• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to an air conditioning system (1) for a motor vehicle comprising a computer capable of determining a recycling rate, an air conditioning and heating unit comprising means for controlling and controlling the state of the vehicle. air in the passenger compartment, a dryer (2) comprising a regenerable adsorbent material, a flap for dosing the amount of air passing through the dryer (2), and at least one regeneration means (7) for heating and desorbing the adsorbent material and the water it contains,
    公开号:FR3064535A1
    申请号:FR1752827
    申请日:2017-04-03
    公开日:2018-10-05
    发明作者:Gerard Olivier；Laetitia Del Fabbro；Eduin Le-Nain
    申请人:Renault SAS；
    IPC主号:
    专利说明:

    ® FRENCH REPUBLIC
    NATIONAL INSTITUTE OF INDUSTRIAL PROPERTY © Publication number:
    (to be used only for reproduction orders)
    ©) National registration number
    064 535
    52827
    COURBEVOIE © Int Cl 8 : B 60 H1 / 00 (2017.01), B 60 H 3/02, 3/06, 1/22, B 01 D 53/26, 53/04
    A1 PATENT APPLICATION
    (© Date of filing: 03.04.17. ©) Applicant (s): RENAULT S.A.S Joint-stock company ©) Priority: simplified - FR. @ Inventor (s): OLIVIER GERARD, DEL FABBRO LAETITIA and LE-NAIN EDUIN. (43) Date of public availability of the request: 05.10.18 Bulletin 18/40. ©) List of documents cited in the report preliminary research: Refer to end of present booklet (© References to other national documents (73) Holder (s): RENAULT S.A.S Société par actions sim- related: folded. ©) Extension request (s): ©) Agent (s): CASALONGA.
    (Ô4J AIR CONDITIONING SYSTEM FOR MOTOR VEHICLE WITH REGENERABLE DRYER AND METHOD FOR CONTROLLING SUCH A SYSTEM.
    FR 3,064,535 - A1 _ The invention relates to an air conditioning system (1) for a motor vehicle comprising
    -a computer capable of determining a recycling rate,
    an air conditioning and heating unit comprising means for monitoring and controlling the state of the air in the passenger compartment,
    -a dryer (2) comprising a regenerable adsorbent material, a flap for metering the amount of air passing through the dryer (2), and at least one regeneration means (7) for heating and desorbing the adsorbent material and the water that it contains,


    i
    Air conditioning system for a motor vehicle with regenerable dryer and method for controlling such a system
    The subject of the present invention is a regenerable dryer, in particular an adsorption air dryer, intended to equip an air conditioning system, in particular for a motor vehicle, as well as a method for controlling such a system.
    The object of the invention is to provide an air conditioning system capable of drying the air of a passenger compartment by adsorption.
    The adsorption consists in using an adsorbent material such as for example a zeolite, a silica gel, a material of the family of MOF ("Metal Organic Framework", in English) or other materials. This material is capable of absorbing part of the water molecules contained in the air.
    The adsorption reaction is exothermic, that is to say it produces heat which is partly transmitted to the air which passes through the material.
    When the material is saturated and no longer has the capacity to retain water, it must be regenerated. It can also be regenerated before being saturated.
    Regeneration is carried out by heating the material or the air which passes through the material in order to evaporate the water. The air which passes through the material to regenerate it, or desorb, is then heated and humidified and is, as part of an integration in a motor vehicle, preferably returned to the outside.
    During air drying, this system does not consume energy. It has the particularity to give off heat during the adsorption phase and to require heat during the regeneration phase.
    The drying of air in a passenger compartment is known by using the evaporator of the air conditioning system which cools the air intended for the passenger compartment while drying it, but the evaporator then consumes a surplus of energy.
    Passive adsorption drying is not used in the automotive industry. Its regeneration is one of its main constraints.
    The documents FR2848500 and FR2905311 disclose a regenerable gas filter for a motor vehicle. The filter is regenerated by taking air from the passenger compartment and passing it through the filter. The air is then sent to the outside of the vehicle via a bypass, or "bypass" in English.
    Document US5566880 discloses the integration of a dryer in the heating unit of a motor vehicle downstream of the recycling flap, and upstream of the heating system.
    The bypass duct allows air to bypass the dryer.
    In this document, an additional regeneration means is provided for regenerating the dryer and is arranged upstream or around the dryer.
    The documents EP2143574, EP2075148 and US20100107656 describe an adsorption dryer having a regeneration function by electrification to heat the sorbent element of the dryer, an air flow reversal function, and a function of separate outlets of the dried air. and humidified air.
    Document FR2780144 describes a heating and air conditioning installation for a motor vehicle comprising a dryer for drying the evaporator after using the air conditioning mode in order to avoid the phenomenon of fogging in heat pump mode or the development of microorganisms, sources of odors . The dryer is placed in parallel with the evaporator and the fan to dry the evaporator in a closed loop while the vehicle is stopped. Regeneration is carried out when the vehicle is stopped. The dryer is traversed by the hot pipe which supplies the heating unit heater in order to be able to heat the material during regeneration. Regeneration can also be carried out when the vehicle is started. Drying can also be carried out by rolling, thus allowing, as we understand, to also dry the recycled air or the outside air.
    In heating mode, the use of the dryer however limits the air flow sent to the passenger compartment and impacts thermal comfort. In regeneration mode while driving, the air flow sent to the passenger compartment is also restricted.
    Document US Pat. No. 5,697,223 discloses a dryer which takes air from the passenger compartment to dry it when the heat pump system is used in order to avoid fogging of the windows. The dryer is then regenerated by means of a hot source, for example an electrical resistance, placed upstream of the dryer. The housing containing the dryer is located in the passenger compartment and is independent of the housing containing the air conditioning - heating system.
    In this document, the dryer does not take into account the air humidified by the heat pump when it starts up. It is traversed by a flow of air taken from the passenger compartment, which induces a inertia long enough to effectively ensure that the windows will not be fogged. Reducing fogging with the dryer is then ineffective in a large number of situations where the heat pump is started while the air conditioning mode was used in a previous mode.
    The documents EP2511116, EP2614973, and EP2881274 propose a module taking air from the passenger compartment and containing a dryer for drying, if necessary, the air supplying the windshield in order to combat the risks of fogging. Regeneration is carried out with an electric heater placed upstream of the dryer. The humidified air is then discharged to the outside. The patent also describes several shapings of the adsorbent material in the dryer.
    Patent JP5083035 proposes a dryer in two parts, integrated in a module housed in the passenger compartment and intended to send dried air to the windshield or to the head of the front passengers.
    It is understood, on reading the document US5509275, that an air conditioning and heating system comprises a wheel-shaped dryer rotating around an axis, and a part of which is used to dry while the other part is regenerated at l using a hot spring.
    Document EP0803685 describes an adsorbent material capable of drying and reducing volatile organic compounds.
    The invention relates to an air conditioning system with air drying by adsorption using an adsorbent material of the zeolite, silica gel, or MOF type.
    This system can be regenerated by desorption by heating the adsorbent material and the water it contains.
    The invention is mainly dedicated to electric vehicles with the aim of gaining consumption but also finds an advantageous application in the starting phases of thermal vehicles, and more generally to any type of vehicle with the aim of reducing the risks of fogging.
    Recirculating interior air in the air conditioning unit - heating the air conditioning system improves energy efficiency and reduces consumption of the air conditioning system. For example, the potential gain in air conditioning mode is between 20% and 60% of air conditioning consumption, in particular to reduce the variability of range and increase the range of an electric vehicle or an electrified vehicle in electric mode.
    However, the use of air recycling presents constraints linked to the recycling of air which is difficult to control, more particularly in heating mode, and which is constrained by the risks of humidity which can cause the windows to fog up. .
    Air recycling is also limited by the risks of excessively increasing the CO2 level in the passenger compartment.
    These risks of CO2 and fogging are mainly linked to the presence of the occupants in the passenger compartment. It is generally recommended that the fresh air flow outside be around 20 to 30 m3 / h per passenger to keep the CO2 level below 1000 ppm.
    In addition, air recirculation with a recirculation inlet traditionally located at the front of the cabin can degrade the thermal comfort of passengers in the rear area of the cabin.
    It is noted, on certain vehicles, that the activation of air recycling causes a risk of direct sending of outside air to the passenger compartment against the direction of the air recycling branch because of the vehicle speed and the dynamic pressures generated.
    The piloting of air recycling sometimes causes a variation in the noise coming from the air conditioning - heating unit with an increase in the sound level induced by the opening of the shutter and the rise in pressure fluctuations generated, in particular by the blower through the air recycling branch.
    Furthermore, on electrified vehicles and more particularly electric vehicles, the consumption in heating mode can be very high.
    In addition, the heating mode is widely used in many geographic regions.
    Consequently, the present invention provides solutions making it possible to optimize the air recycling rate at a higher value while effectively protecting against the risks of misting and limiting the other constraints listed above.
    Air drying for the passenger compartment is a solution which makes it possible to reduce the mass of water in the air and to accept a higher rate of recycling of the passenger compartment air.
    A passive air drying solution is to use the physical principle of adsorption.
    This adsorption reaction is exothermic and therefore causes the dried air to heat up, which is beneficial in heating mode.
    In heating mode, air drying by adsorption is therefore particularly suitable since it allows, without drawing on the energy available in the vehicle, to increase the air recycling rate and to heat the air thanks to to the exothermic reaction.
    In air conditioning mode, the air conditioning uses a cold heat exchanger including the evaporator. This, in the case of a vapor compression loop system, cools the air while condensing part of the air humidity, in particular the humidity generated by the occupants via the recirculation of air .
    Passive drying of the air by adsorption can then constitute a constraint although it reduces the latent energy of the cold exchanger because it heats the air and increases the sensitive energy spent in the cold exchanger to cool the air. The energy balance is therefore of limited interest.
    In this context, adsorption drying is particularly advantageous during heating modes to reduce consumption and increase the range of electrified vehicles and mainly electric vehicles. It is used to improve air recycling when this is limited by a risk of misting.
    Drying may not be used, or may be used until a recycling rate limit is reached without exceeding it and reducing the humidity in the passenger compartment. The supply of fresh air then serves to sufficiently oxygenate the passenger compartment. In this case, drying makes it possible to reduce the humidity in the passenger compartment and to avoid the risk of misting the windows.
    In air conditioning mode, it is preferable not to use it so as not to saturate it too quickly and thus increase its cycle of use at the end of which it must be regenerated.
    Adsorption drying can also be used simply to prevent fogging. This is interesting then for all types of vehicles (thermal vehicles and electrified vehicles). The system is used when a risk of mist is detected, that is to say when sensors detect that approaching conditions favoring the appearance of fogging on the windows.
    The drying of the air also makes it possible in this case to limit the energy consumed to demister or prevent fogging.
    When the risk of fogging is not detected, it is preferable not to use drying in order not to saturate the adsorbent material too quickly and thus to increase its cycle of use at the end of which it must be regenerated.
    The dryer is used less and the cycle of use is longer, or its size is reduced than in the previous case of optimizing air recycling to reduce consumption. Drying is used in this case above all for reasons of visibility and safety and possibly, in particular in the case of electrified vehicles, for reasons of energy saving.
    Adsorption drying can also be combined with the use of a reversible air conditioning loop with heating by a heat pump. If the same exchanger is used in air conditioning mode to cool the air and in heating mode with the heat pump to heat the air, there is a risk of causing rapid and complete fogging of the panes as soon as the pump is started. heat.
    This phenomenon can occur, for example, in the intermediate season when air conditioning is used to cool the air and the heat pump is used a few hours or a few days later to heat the air. At the end of the air conditioning mode, a layer of water from the condensation of humidity remains on the surface of the exchanger.
    When the heat pump is started, this water is very quickly evaporated and entrained in the air flow, then condenses on the cold surfaces of the passenger compartment windows, forming a layer of mist which is problematic for reasons lack of visibility and insecurity.
    This use of air drying concerns vehicles using an exchanger capable of producing cold or heat.
    In general, this type of exchanger relates for example to reversible refrigeration loops operating in air conditioning and heat pump mode and delivering cold and hot on the same exchanger.
    When the exchanger has been used to produce cold and it is desired to use it to produce hot, the drying placed downstream of the exchanger allows the start of the heating mode to retain part of the humidity of the hot air charged with the water which had been deposited on the exchanger during the cooling mode.
    After a few seconds, when the exchanger has dried out, the dryer enters a longer regeneration phase using the air heated by the exchanger, which this time gradually loads with the humidity of the dryer without risking d '' mist the windows. The humidity of the exchanger is thus dissipated over time thanks to the dryer. To facilitate this regeneration phase, a regeneration means can be used in addition to increase the desorption temperature of the material.
    The vehicles concerned are mainly electrified vehicles and particularly electric vehicles comprising a heat pump advantageously limiting energy losses in heating mode. Other types of vehicle may also be affected.
    In view of the above, the invention relates to an air conditioning system for a motor vehicle comprising a computer capable of determining a recycling rate, an air conditioning and heating unit comprising means for monitoring and controlling the state of the air in the passenger compartment, and a dryer comprising a regenerable adsorbent material, a flap making it possible to dose the amount of air passing through the dryer, and at least one regeneration means for heating and desorbing the adsorbent material and the water that 'it contains.
    The dryer flap can be controlled by the computer.
    According to one embodiment, the means for controlling and controlling the state of the air in the passenger compartment include in particular an air recycling flap capable of controlling the flow of air coming from outside, controlled by the computer, an air recycling branch leading the air upstream of the air recycling shutter, an outside fresh air inlet branch leading the air upstream of the recycling shutter, a common air branch recycled - fresh outside air leading the air downstream of the recycling flap and upstream of the openings made in the passenger compartment of the vehicle.
    a hot branch in fluid communication with the common branch recycled air - outside fresh air by means of an opening made at the interface therewith, a mixing shutter capable of partially or completely closing the opening made between the branch common recycled air - outside fresh air and the hot branch, a blower in the common branch recycled air - outside fresh air, and an evaporator in the common area recycled air - outside fresh air.
    According to another embodiment, the air conditioning and heating unit comprises a bypass duct connecting a point downstream of the blower 8 to the outside air intake zone.
    According to another embodiment, the air conditioning and heating box comprises a bypass duct connecting the upstream side of the air distribution flap to the vehicle windshield to the outside air intake area.
    According to another embodiment, the air conditioning and heating unit comprises a bypass duct connecting a point downstream of the blower to a direct outlet to the outside.
    According to another embodiment, the air conditioning and heating unit uses the existing outlet located under the evaporator exchanger as a bypass to the outside and which returns the condensates to the outside.
    According to another embodiment, the dryer is integrated into the air recycling branch of the air conditioning and heating unit.
    According to another embodiment, the dryer is integrated into the outside air inlet branch of the air conditioning and heating unit.
    ίο
    According to another embodiment, the dryer is located in the common branch of recycled air - fresh air outside the air conditioning and heating unit.
    According to another embodiment, the air conditioning and heating unit further comprises an air heater for heating the hot branch.
    According to another embodiment, the evaporator of the air conditioning and heating unit is coupled to a condenser, and in which the dryer of the air conditioning and heating unit is located in the hot branch.
    According to another embodiment, the regeneration means of the dryer is chosen from an electrical resistance integrated in the dryer or the dryer material, an electrical resistance integrated upstream of the dryer, a PTC type resistance, the air heater, the condenser .
    According to another embodiment, the dryer of the air conditioning and heating unit is coupled to a gas filter.
    According to another embodiment, the air conditioning system comprises at least one means of measurement among a humidity sensor, a temperature sensor, a CO2 sensor, and a detector of the number of passengers in the vehicle.
    According to another embodiment, the computer is connected to said at least one measurement means to determine the rate of air recycling.
    According to another embodiment, the computer is capable of determining when the material of the dryer is saturated by means of said at least one measurement means, and can order the activation of the regeneration means of the dryer.
    The invention also relates to a method of controlling an air conditioning for a vehicle comprising a step of determining the rate of recycling of air by the computer, a step of heating and desorption of the adsorbent material and of the water that it contains, and a step for controlling the dryer flap to measure the amount of air passing through the dryer.
    According to one embodiment of the method, the step of determining the rate of recycling of air by the computer is carried out by means of at least one measuring means among a hygrometry sensor, a temperature sensor, a CO2 sensor, and a detector of the number of passengers in the vehicle.
    The step of heating and desorbing the adsorbent material and the water it contains can be implemented by the regeneration means of the dryer, on request from the computer.
    The invention also relates to a motor vehicle comprising an air conditioning system as defined above.
    Other objects, advantages and characteristics of the invention will appear on reading the detailed description of an embodiment of the invention, not limiting, illustrated in the accompanying drawings, in which:
    Figure 1 illustrates an air conditioning system with a bypass duct and comprising a dryer in the air recycling branch, Figure 2 illustrates an air conditioning system without a bypass duct and comprising a dryer in the air recycling branch , Figure 3 illustrates an air conditioning system with a bypass duct and comprising a dryer in the outdoor air branch, Figure 4 illustrates an air conditioning system without a bypass duct and comprising a dryer in the air-outdoor branch, Figure 5 illustrates different positions of a dryer in the common branch recycled air - fresh air outside the air conditioning system, FIG. 6 is a diagram of a dryer installed in parallel with an air filter in an independent box in the passenger compartment of the vehicle, Figure 7 is a diagram of an independent box a dryer installed upstream of a gas filter in an independent box da ns the passenger compartment of the vehicle, FIG. 8 illustrates an air conditioning system in which the evaporator exchanger is also associated with a condenser function, and FIG. 9 is a diagram of a dryer coupled to a gas filter.
    The invention relates to an air conditioning system 1 with drying of the air by adsorption using an adsorbent material of the zeolite, silica gel, or MOF type.
    This system can be regenerated by desorption by heating the adsorbent material and the water it contains.
    The invention is mainly dedicated to electric vehicles with the aim of gaining consumption but also finds an advantageous application in the starting phases of thermal vehicles, and more generally to any type of vehicle with the aim of reducing the risks of fogging.
    The dryer 2 can be used when the increase in air recycling is limited by the risk of fogging until reaching a limit imposed by the rate of CO2 in the passenger compartment, in order to optimize the partial recycling of the cabin air to reduce the consumption of electrified vehicles in heating mode and increase their range.
    According to one embodiment, the dryer 2 is used when the risks of fogging appear.
    The dryer 2 can also be used when starting the heating mode with the hot exchanger 3. Advantageously, provision can be made to use only a single hot and cold exchanger 3 in order to save space, cost and weight on vehicles, in particular on electrified vehicles, equipped with a reversible air conditioning - heat pump type system.
    In these different uses, drying, by its exothermic reaction, provides "free" air heating and increases the performance of the heating mode of the air conditioning system 1.
    The regulation means which can be used comprise detection means comprising:
    a hygrometry sensor which makes it possible to provide information on the risk of misting the windows, a cabin air temperature sensor and / or a window temperature sensor which makes it possible, with the hygrometry sensor, to provide information on the risk of window fogging, a CO2 sensor which provides information on the need to renew the air and increase the oxygen level, and a passenger count detector which provides an estimate of the production of humidity and CO2 generated by the occupants in the passenger compartment.
    The regulation means also include actuators comprising:
    an air recycling flap 4 which allows the flow of air coming from outside to be measured. The complement of the air flow is recycled air from the passenger compartment, a control flap 5 of the dryer 2 which makes it possible to dose the air flow which passes through the dryer 2. The complement of the flow circulating in the branch bypasses the dryer 2, a shutter used in the regeneration mode of the dryer 2 and which allows the evacuation of the regeneration air flow, a regeneration means 7 used in the regeneration mode and which makes it possible to heat and desorb the dryer 2 and l the water it contains, known components, such as the blower 8, the heating system and the cooling system.
    In addition, a duly programmed computer controls these actuators, in particular from a recycling rate.
    The present invention makes it possible to adjust the air flow rate passing through the dryer 2 in order to preserve its autonomy as a function of the need and to meet the need to reduce the humidity of the air which can be to prevent fogging. It also makes it possible to optimize the recycling of air without the risk of fogging to reduce consumption in heating mode or to take charge of condensates evaporated by an evaporator exchanger used as a condenser, or evapo-condenser, in heating mode. It also makes it possible to adjust the flow of fresh air coming from outside in order to regenerate the air in the passenger compartment according to the number of occupants or the level of CO2.
    The control can be coupled with the optimization of the air quality in the passenger compartment, for example by controlling the flow of fresh air outside depending on the pollution in the outside environment while ensuring in the long term desired oxygenation in the passenger compartment.
    The optimization of partial recycling thanks to the dryer advantageously makes it possible to limit the flow of outside air, and to limit the entry of pollution in gas or in particles coming from outside. The fresh air flow can thus advantageously be controlled as a function of the state of the external pollution thanks to information coming from an external pollution sensor, or else from a mapping of the external pollution.
    Regeneration is implemented when the performance of dryer 2 decreases to a low level which justifies regeneration. We can measure the amount of water introduced into dryer 2 from the temperature and humidity readings upstream and downstream of dryer 2.
    The air conditioning system illustrated in FIGS. 1 to 9 comprises a single, non-mobile one-piece dryer 2.
    The dryer 2 is fitted with a flap allowing the quantity of air which must pass through the dryer 2 to be determined in order to meet the objective of the desired level of humidity in the passenger compartment and on the windows. The rest of the air volume is diverted to bypass dryer 2.
    This shutter can be piloted progressively to obtain an optimal position or it can be piloted on / off, that is to say alternately open / closed, favoring one or the other of the two positions to obtain the quantity optimal drying average sought.
    The control of the shutter allows to retain in the dryer 2 the quantity of water just necessary for the desired objective and thus to save the longevity of the dryer 2 before it is saturated and it becomes ineffective for drying the air . It also makes it possible to advantageously limit the loss of air pressure and the consumption linked to the use of dryer 2.
    In addition, in the phases where the dryer 2 should not be used, because there is no risk of misting, or that the air conditioning mode is activated, the entire flow of the branch bypasses the dryer 2 .
    The regeneration phase is preferably carried out during a period of parking in the vehicle parking lot and in particular when it is connected to an electrical terminal in order to benefit from the available electrical energy. Vehicles that can be connected to the fixed electrical network, such as electric vehicles, hybrid vehicles, or connectable thermal vehicles, are particularly suitable.
    Regeneration can, if necessary, be carried out while the vehicle is running, although it is in these conditions likely to interfere with thermal comfort in the passenger compartment.
    Regeneration is carried out by heating the material. The regeneration means 7 can be produced in different ways by means of an electrical resistance integrated in the dryer 2 or the material of the dryer 2, or an electrical resistance, for example of PTC type, integrated in the air branch. just upstream of the dryer 2 if we consider the direction of air circulation in regeneration mode of the dryer 2. The heating means heats the air which passes through the dryer 2 by evaporating the water and transporting it.
    An already existing regeneration means 7 such as an air heater 9, a heat pump condenser, an electrical resistance can advantageously be used to regenerate the adsorbent material of the dryer 2.
    During the regeneration of the dryer 2, the air which feeds the dryer 2 can come from the passenger compartment by the air recycling branch 6, or from the outside by the outside air inlet branch.
    During the regeneration mode of the dryer 2, the air which passes through it transports the water and can then be evacuated towards the outside in the opposite direction into the air inlet by means of a bypass duct 11 arranged in the air conditioning unit. - heating and which connects the air distribution area to the windshield and the outside air intake area. The flap used can then come from the air distribution flap to the windshield fitted to allow air to be directed towards the outside air intake during the regeneration mode.
    It can also be evacuated to the outside via an outlet added to the housing and dedicated to regeneration mode. A flap also added allows the orientation of air to this outlet.
    It can also be evacuated to the outside via the existing outlet located under the evaporator and usually used to evacuate the condensates generated during the evaporator's cold production mode. In this case, the distribution flaps can block the passage of air to the passenger compartment and force the passenger through the condensate passage opening.
    In another embodiment, the air is exhausted to the passenger compartment.
    The dryer 2 is sized according to the desired use, its performance and its autonomy.
    The autonomy of dryer 2 could be similar to that of a battery on an electrified vehicle in order to benefit from the battery recharge period to regenerate dryer 2.
    It can also be limited to one vehicle journey.
    The presence of the dryer 2 can make it possible to gain in energy consumption of the heating mode and to reduce the dimensioning of the heating system or the auxiliary heating of a thermal vehicle, for example, of an electrical resistance and thus to save in cost.
    FIG. 1 represents an arrangement in which the dryer 2 is integrated in the air recycling branch.
    Depending on the number of occupants in the passenger compartment, the computer determines the air recycling rate, i.e. the minimum quantity necessary to limit the CO2 rate or else to limit the humidity in the cockpit and on the windows, and thus determines the amount of air which can be recycled from the cockpit, thereby making it possible to limit the consumption of the heating air conditioning system 1 or else to avoid the risks of fogging in the cockpit.
    In this configuration, only the part of the recycled air flow coming from the passenger compartment can pass through the dryer 2.
    The dryer 2 is equipped with a shutter which can be controlled by the computer and which allows the quantity of air which passes through the dryer 2 to be measured in order to meet the desired level of humidity level in the passenger compartment and on the windows. The rest of the air volume is diverted to bypass dryer 2.
    This shutter can be controlled gradually to obtain an optimal position or it can be controlled in a binary manner, that is to say alternately open / closed, favoring one or the other of the two positions to obtain the quantity optimal drying average sought.
    This control of the shutter makes it possible to retain in the dryer 2 the quantity of water just necessary for the desired objective and thus to save the longevity of the dryer 2 before it is saturated and it becomes ineffective for drying the air. . It also makes it possible to limit the air pressure drop and the consumption linked to the use of dryer 2.
    Furthermore, in the phases where the dryer 2 must not be used, the entire flow rate of the branch bypasses the dryer 2.
    The appropriate time to regenerate the dryer 2 can be determined from the performance of the dryer 2. In fact, when the effect of the dryer 2 on the humidity in the passenger compartment becomes weak and insufficient despite the air flow which passes through dryer 2, the computer provides information on the need to regenerate dryer 2 as soon as possible.
    The size of dryer 2 determines its drying performance and its service life before regeneration.
    Regeneration can be carried out during a parking stop of the vehicle, especially when the vehicle is connected to a stationary electrical network, for example to recharge a battery.
    It can also be considered during a rolling phase.
    In FIG. 1, the recycling flap 4 is closed, thus allowing the blower 8 to only suck air from the passenger compartment.
    The power level of the blower 8 is adjusted to optimize the air flow through the dryer 2 as well as its regeneration.
    The control flap 5 of the dryer 2 is in the position allowing all the air flow to pass through the dryer 2.
    The electrical resistance upstream of the dryer 2 makes it possible to heat to an optimal temperature.
    In a variant, the electrical resistance is integrated in the dryer 2 then allowing the material and its volume of water to be heated directly.
    The air, passing through the dryer 2, is charged with moisture then passes through the blower 8 then the filter and the evaporator then joins the area of the air distribution flaps. The air distribution flaps are in a position which prevents the passage of air to the various outlets to the passenger compartment and allows passage through a bypass duct 11 specially fitted for regeneration mode and connecting the upstream of the flap distributing air to the windshield at the outside air intake area.
    In other variants, this bypass duct 11 could connect any point downstream of the blower 8 to the outside air intake zone.
    The recycling flap 4 being in the closed position, the moist air is then returned to the outside against the direction of the usual use of suction of outside air.
    The installation of the dryer 2 in the air recycling branch 6 advantageously makes it possible to attenuate the variations in noise level in the passenger compartment linked to the use of the recycling of the air in the passenger compartment and to direct air contact. between the blower 8 and the passenger compartment, and reduce the risks of direct passage of air from the outside to the passenger compartment linked to the speed of the vehicle and the pressure balance.
    Figure 2 is a variant with, in replacement of the bypass duct 11, an air outlet to the outside and its flap fitted specifically for the regeneration mode.
    In this case, the recycling flap 4 can have any position and the air can come from outside or from the passenger compartment.
    In regeneration mode, the air outlet flap opens and prevents passage to the evaporator.
    Variants have been shown in the embodiments of FIGS. 1 and 2 in FIGS. 3 and 4 where the dryer 2 is installed in the branch of the outside air inlet.
    In FIG. 3, the electrical resistance which is used during the regeneration phase can also be used in heating mode as an addition to the heating system. This electrical resistance can also be located in the bypass duct 11. It can also be located in the independent box 12 and be used as a heating system on the one hand and as a means of regenerating the dryer 2 on the other hand.
    FIG. 5 represents several possible locations of the dryer 2 downstream of the air recycling flap 4.
    The drying illustrated in FIG. 5 is composed of a single monobloc dryer 2 and is not mobile.
    We can also consider a system broken down into 2 parts with an active part to dry the air and the other part in regeneration mode. The next phase then consists in reversing the operations by using the regenerated part to dry the air and by regenerating the other part. The phase change can be achieved with a mobile system, for example in rotation, or by crossing the air circuits.
    The blower 8 is preferably located upstream as illustrated in FIG. 5. It can also be double, in order to supply the two parts of the drying independently. The part of the dryer 2 being regenerated with its electric heating system can be supplied with recycled air or with outside air and the humidified air at the outlet is discharged to the outside via an outlet located just downstream.
    The drying and regeneration phases are obtained by controlling the upstream and downstream components of the drying.
    In another embodiment, an interchangeable removable cartridge system can be provided. This solution has the advantage of eliminating the regeneration phase which is not carried out in the vehicle. It can make it possible to undersize dryer 2 by making the change more often. The cartridge can either be disposable or be regenerated outside the vehicle by the user or be regenerated in store.
    Figures 6 and 7 show the dryer 2 located in an independent box 12 located in the passenger compartment. Preferably, a cabin air filtration system is also installed in this box.
    In Figure 6 the dryer 2 is in a branch parallel to that of the air treatment.
    In Figure 7, the dryer 2 is downstream of the air treatment.
    The invention also relates to a vehicle equipped with an exchanger 3, or evaporator, producing cold or heat for example with an air conditioning system-heat pump 1 as seen in FIG. 8. The dryer 2 is installed downstream of the dual-function exchanger 3, instead of the independent heat exchanger.
    When the heating mode is started after a cycle of use of the air conditioning mode, the condensates trapped on the surface of the exchanger 3 evaporate. The dryer 2 advantageously makes it possible to retain them and to avoid misting the windows of the passenger compartment.
    The mixing flap is used as the pilot flap 5 of the dryer 2 to adjust the proportion of the air flow through the dryer 2.
    When the exchanger 3 is dry and no longer releases water vapor, the shutter can be closed and allow the entire air flow to bypass the dryer 2.
    If you want to regenerate the dryer 2 during heating mode, the shutter can open partially to let a quantity of hot air pass through the dryer 2. An electrical resistance can be placed upstream of the dryer 2, or integrated into that to increase the temperature of this air. The humidified air flow is adjusted according to the humidity in the passenger compartment and near the windows in order to avoid fogging.
    The bypass duct between the air distribution area and the outside air inlet can optionally be added in order to reject the humidified air flow during the regeneration phase.
    FIG. 9 represents the coupling in a single component of the air filtration and air drying functions. The air treatment system can come from suitable technology, such as for example a plasma coupled to an adsorbent filter 13.
    In certain provisions, the presence of the dryer 2 and its regeneration system make it possible to envisage the regeneration of the gas filter 10 in order to advantageously increase the life of the filter as well as its gas abatement performance. This is possible when the heat source allowing the regeneration of the dryer 2 is located upstream of the gas filter 10. A variant consists in having a filter incorporating an internal electrical resistance in order to heat it during the regeneration phase.
    The drying of the evaporator makes it possible to limit the odors linked to the development of microorganisms on the surface of the exchanger 3. This can be achieved by the dried air upstream of the evaporator or else by the source of heat used in regeneration mode of dryer 2 when it is located upstream of the evaporator as illustrated in FIG. 5.
    As will be appreciated, the invention which has just been described makes it possible to ensure the regeneration of the dryer 2 with reheating and rejection to the outside of the humidified air without disturbing the use of the vehicle.
    In addition, the drying function can be controlled and not be used in certain modes of use, for example when using the air conditioning to cool the passenger compartment.
    Finally, the drying function can be controlled as closely as possible to optimize its efficiency to meet objectives and optimize its autonomy.
    In addition to the advantages linked to the reduction in consumption, the reduction in the risks of fogging and the possibility of a single exchanger 3 for generating cold and heat, the invention makes it possible to attenuate the variations in noise level in the passenger compartment linked to the use of recycling air from the passenger compartment and to direct air contact between the blower 8 and the passenger compartment.
    The invention makes it possible to reduce the risks of direct passage of air from the outside to the passenger compartment linked to the speed of the vehicle and the balance of pressures.
    Advantageously, the dryer 2 allows the acceleration from comfort setting to vehicle starting in heating mode.
    Coupling the dryer 2 with the air filtration system illustrated in FIG. 9 also makes it possible, advantageously, to regenerate the gas filter 10 and thus to increase the life of the filter as well as its performance in reducing the gas.
    The drying of the evaporator, the filter and the air ducts thus making it possible advantageously to combat odors linked to the development of microorganisms on the surface of these components.
    权利要求:
    Claims (20)
    [1" id="c-fr-0001]
    1. Air conditioning system (1) for a motor vehicle, comprising a computer capable of determining a recycling rate, an air conditioning and heating unit comprising means for monitoring and controlling the state of the air in the passenger compartment , characterized in that it comprises a dryer (2) comprising a regenerable adsorbent material, a flap making it possible to dose the amount of air passing through the dryer (2), and at least one regeneration means (7) for heating and desorbing the adsorbent material and the water it contains, and in that the dryer flap (2) can be controlled by the computer.
    [2" id="c-fr-0002]
    2. Air conditioning system (1) according to claim 1, in which the means for controlling and piloting the state of the air in the passenger compartment comprise an air recycling flap (4) capable of controlling the flow rate. of air from outside, controlled by the computer, an air recycling branch (6) leading the air upstream of the air recycling flap (4), a fresh air inlet branch outside leading the air upstream of the recycling flap (4), a common branch of recycled air - outside fresh air (14) leading the air downstream of the recycling flap (4) and upstream of the openings made in the passenger compartment of the vehicle, a hot branch in fluid communication with the common branch of recycled air - outside fresh air (14) by means of an opening made at the interface therewith, a mixing flap capable of partially or completely closing the opening between the recirculated air - outdoor fresh air branch erector (14) and the hot branch, a blower (8) in the common branch recycled air - outside fresh air (14), and an evaporator in the common area recycled air - outside fresh air.
    [3" id="c-fr-0003]
    3. The air conditioning system according to claim 2, wherein the air conditioning and heating unit comprises a bypass duct (11) connecting a point downstream of the blower (8) to the outside air intake area.
    [4" id="c-fr-0004]
    4. Air conditioning system according to claim 2, wherein the air conditioning and heating unit comprises a bypass duct connecting a point downstream of the blower to a direct outlet to the outside.
    [5" id="c-fr-0005]
    5. The air conditioning system as claimed in claim 2, in which the air conditioning and heating unit uses the existing outlet located under the evaporator exchanger and which returns the condensates to the outside as a bypass duct to the outside.
    [6" id="c-fr-0006]
    6. Air conditioning system according to any one of claims 3, 4 and 5, wherein the air conditioning and heating unit comprises a bypass duct (11) connecting the upstream of the air distribution flap to the barrier vehicle breeze to outside air intake area.
    [7" id="c-fr-0007]
    7. Air conditioning system according to any one of claims 1 to 6, wherein the dryer (2) is integrated in the air recycling branch (6) of the air conditioning and heating unit.
    [8" id="c-fr-0008]
    8. Air conditioning system according to any one of claims 3 to 6 wherein the dryer (2) is integrated in the air intake branch outside the air conditioning and heating unit.
    [9" id="c-fr-0009]
    9. Air conditioning system according to any one of claims 3 to 6 wherein the dryer (2) is located in the common branch recycled air - outside fresh air (14) of the air conditioning and heating unit.
    [10" id="c-fr-0010]
    10. Air conditioning system according to any one of claims 2 to 9, wherein the air conditioning and heating unit further comprises an air heater (9) for heating the hot branch.
    [11" id="c-fr-0011]
    11. Air conditioning system according to any one of claims 2 to 6, in which the evaporator of the air conditioning and heating unit is coupled to a condenser, and in which the dryer (2) of the air conditioning and heating unit is located in the hot branch.
    [12" id="c-fr-0012]
    12. Air conditioning system according to claim 11, in which the regeneration means (7) of the dryer (2) is chosen from an electrical resistance integrated in the dryer (2) or the material of the dryer (2), an integrated electrical resistance. upstream of the dryer (2), a PTC type resistor, a heater (9), or the condenser.
    [13" id="c-fr-0013]
    13. Air conditioning system according to any one of claims 1 to 12, wherein the dryer (2) of the air conditioning and heating unit is coupled to a gas filter (10).
    [14" id="c-fr-0014]
    14. Air conditioning system according to any one of claims 1 to 13, comprising at least one measuring means chosen from a hygrometry sensor, a temperature sensor, a CO2 sensor, and a detector of the number of passengers in the vehicle.
    [15" id="c-fr-0015]
    15. The air conditioning system as claimed in claim 14, in which the computer is connected to said at least one measuring means for determining the rate of recycling of the air.
    [16" id="c-fr-0016]
    16. Air conditioning system according to any one of claims 14 and 15, in which the computer is capable of determining when the material of the dryer (2) is saturated by means of said at least one measuring means, and of ordering the activation of the regeneration means (7) of the dryer (2).
    [17" id="c-fr-0017]
    17. A method of controlling an air conditioning system according to any one of claims 1 to 16, characterized in that it comprises a step of determining the rate of air recycling by the computer, a step of heating and desorption adsorbent material and the water it contains, and a step of piloting the dryer flap (2) to measure the amount of air passing through the dryer (2).
    5
    [18" id="c-fr-0018]
    18. The control method as claimed in claim 17, in which the step of determining the air recycling rate by the computer is carried out by means of at least one measuring means chosen from a humidity sensor, a sensor. temperature, a CO2 sensor, and a detector of the number of passengers in the vehicle.
    10
    [19" id="c-fr-0019]
    19. Control method according to claims 17 and 18, wherein the step of heating and desorption of the adsorbent material and the water it contains is implemented by the regeneration means (7) of the dryer (2 ), on request from the computer.
    [20" id="c-fr-0020]
    20. Motor vehicle comprising a system of
    15 air conditioning according to any one of claims 1 to 19.
    1/5
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    同族专利:
    公开号 | 公开日
    FR3064535B1|2019-04-26|
    EP3385101A1|2018-10-10|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE4304077A1|1993-02-11|1994-08-18|Behr Gmbh & Co|Device for reducing the air humidity in a passenger compartment of a motor vehicle|
    FR2773114A1|1997-12-30|1999-07-02|Valeo Climatisation|Heating and ventilation assembly for vehicle air conditioning equipment|
    JP2015174463A|2014-03-13|2015-10-05|マツダ株式会社|Air conditioner for vehicle|
    FR3102235B1|2019-10-16|2021-11-05|Renault|AIR DRYING DEVICE OF A MOTOR VEHICLE INTERIOR|
    FR3102099A1|2019-10-16|2021-04-23|Renault|AIR DRYING DEVICE OF A MOTOR VEHICLE INTERIOR|
    FR3111588A1|2020-06-17|2021-12-24|Renault|Device for air drying a motor vehicle interior.|
    法律状态:
    2018-04-20| PLFP| Fee payment|Year of fee payment: 2 |
    2018-10-05| PLSC| Search report ready|Effective date: 20181005 |
    2019-04-18| PLFP| Fee payment|Year of fee payment: 3 |
    2020-04-20| PLFP| Fee payment|Year of fee payment: 4 |
    2021-04-23| PLFP| Fee payment|Year of fee payment: 5 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1752827A|FR3064535B1|2017-04-03|2017-04-03|AIR CONDITIONING SYSTEM FOR A MOTOR VEHICLE WITH REGENERABLE DRYER AND METHOD FOR CONTROLLING SUCH A SYSTEM|
    FR1752827|2017-04-03|FR1752827A| FR3064535B1|2017-04-03|2017-04-03|AIR CONDITIONING SYSTEM FOR A MOTOR VEHICLE WITH REGENERABLE DRYER AND METHOD FOR CONTROLLING SUCH A SYSTEM|
    EP18165386.6A| EP3385101A1|2017-04-03|2018-04-03|Air-conditioning system for a motor vehicle with regenerative dryer and method for controlling such a system|
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