• 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:
    A water injection compressor, which injects the water inside the separator 3 into the compressor and discharges the water at the same time as the compressed air in the separator and then acquires condensed and separated water, stops and then, if it remains stopped for a predetermined period of time without activation, is activated and operates for a fixed period of time.
    公开号:BE1018906A3
    申请号:E2007/0402
    申请日:2007-08-23
    公开日:2011-11-08
    发明作者:Fumio Takeda；Hitoshi Nishimura；Natsuki Kawabata；Masakazu Aoki
    申请人:Hitachi Ind Equipment Sys；
    IPC主号:
    专利说明:

    "Injection compressor"
    Context of the invention (Technological field)
    The present invention relates to a water injection compressor in which water is injected and from which water is discharged together with compressed air.
    (Prior art)
    A water injection compressor is lubricated and sealed by water injected into the compressor. In order that the water discharged together with the compressed air can be reused for injection into the compressor, this water injection compressor has a water circulation system in which the water circulates and is then used. We know that we can achieve a long continuous operation with a low concentration of impurities in the circulating water without any addition of water by supplying compressed air to a water tank, cooling the air compressed from the water tank and then supplying the condensed and separated water to the compressor, the remainder of the circulating water being drained from the water tank. A previous patent disclosure dealing with this subject is found in Patent Document 1.
    [Patent Document 1] Japanese patent made public under No. 2000-45948.
    Summary of the invention
    According to the conventional technique mentioned above, when a compressor part is running, the constant supply of water condensed by the compressed air and the high pressure and temperature in the compressor part prevents the bacteria / germs from proliferating. But when the compressor part is stopped, the time brings the water inside the separator used to separate the air from the water and inside the pipes almost at atmospheric temperature with the result that bacteria / germs proliferate in the water remaining in the separator and the pipes.
    The period from spring to autumn, when the atmospheric temperature is around 30 ° C, is particularly favorable for the spread of bacteria / germs. When the compressor part is not used for a long period of time, it is necessary to change the water frequently and also to wash the equipment and the pipes to prevent propagation.
    An object of the present invention is, therefore, to present a compressor part capable of remaining stationary for a long period of time while preventing the proliferation of bacteria / germs in the separator, the compressor part and the pipes without having need, for example, to change the water before going back to work.
    To achieve the object mentioned, according to the present invention, there is provided a water injection compressor which injects water inside the separator in the compressor part, discharges the water at the same time as the air compressed in the separator and then acquires condensed and separated water and which stops and then, if it remains stationary for a predetermined period of time without receiving an activation request (eg start request) , is activated and operates for a defined period of time.
    According to the embodiments of the present invention, it is possible to prevent bacteria / germs from proliferating in the compressor part and the pipes.
    Brief description of the drawings
    Fig. 1 is a block diagram illustrating an embodiment of the present invention.
    Fig. 2 is a graph showing the ratio of pause and operating periods of time to discharge air temperatures in one embodiment of the present invention.
    Fig. 3 is a graph showing the relationships between atmospheric temperatures and periods of pause and running time in one embodiment of the present invention.
    Fig. 4 is a flowchart showing the operating procedure in one embodiment of the present invention.
    Fig. 5 is a graph showing the ratio of pause and operating time periods and discharge air temperatures.
    Fig. 6 is a block diagram illustrating the composition of the system in another embodiment of the present invention.
    Fig. 7 is a block diagram illustrating the composition of the system in a third embodiment of the present invention.
    Fig. 8 is a block diagram illustrating another composition relating to water quality control.
    Fig. 9 is a block diagram illustrating a third composition relating to water quality control.
    Detailed description of the invention
    Detailed Description of Preferred Embodiments of the Invention
    Referring now to FIG. 1, there is shown the composition of the system of a water injection compressor in one embodiment of the present invention. A compressor part 1 is a volumetric compressor. A screw compressor will be taken as an example in the following explanation.
    The water in a separator 3 is supplied by the internal pressure of the separator via a water supply line 20 connected to the separator 3 to the compressor 1. More concretely, the water is cooled by a cooler water-cooled water pipe 4 connected to the water supply pipe 20 and is supplied by a water injection pipe 22 into the compression cavity of the compressor part 1. The compressor part 1 in which bearings water-lubricated are used does not have sufficient pressure to send water into the separator 3 at the time of activation of the compressor part 1, so a pump 29 provided between the water supply line 20 and the air-cooled water cooler 4 activates and increases the water pressure of the separator 3 and supplies the water to the bearings of the compressor part 1 with water injection.
    The compressor part 1 admits the air through an inlet orifice 14 having an inlet air filter, compresses the air, discharges the air through a discharge orifice not shown in the drawing in the separator 3 via a pipe at the same time as the water injected during the compression process. The separator 3 separates the water from the compressed air. The water is stored in the lower part of the separator 3 and is then brought back by the water supply line 20 into the compressor part 1.
    The compressed air is separated by the separator 3, sent by an air discharge line 16 connected to the upper part of the separator 3, cooled by an aftercooler 5, separated from the drainage (water) condensed by a drainage separator 19 and then discharged into a pipe 18 for supplying compressed air.
    At the time of a comparatively long stop, for example at night or during holidays, in other words when the compressor part 1 remains at a standstill without receiving a request for activation from the outside, the compressor part 1, as shown in Fig. 2, when it remains stationary longer than a predetermined pause time toff 23, is automatically activated and operates for a defined time period of tone 24 for the purpose of quality control. the water. Subsequently, the compressor part 1 repeats pause and operation until the water injection compressor is restarted. Pause and operation of the compressor will be explained further with reference to FIG.
    The water injection compressor includes a console 9 to operate and control the entire unit. The console 9 makes it possible to drive the drive motor 2 of the water injection compressor 1, a cooling fan motor 6 and the motor for the pump 29. The console 9 also makes it possible to operate a solenoid valve 45 of a bypass line which opens and closes according to the operation of the pump 29 which is used to pressurize the water at the start-up and a three-way solenoid valve 21 to switch between the pipe to cool the water supplied to the compressor 1 via the air-cooled water cooler 4 and the pipe to supply water to the compressor 1 by maintaining the water at an elevated temperature without being cooled via the water cooler air cooled 4.
    The inlet port 14 has an atmospheric temperature sensing sensor 13 (intake air temperature), a separator temperature sensing sensor 11, and a discharge air temperature sensing sensor 12. to detect the temperature of the air discharged by the compressor 1 with which the console 9 can detect the temperatures of the parts. In addition, by using a timer 10, the console 9 makes it possible to measure a start point in time and a break point in time of the compressor part 1. The console, as represented in FIG. a memory device for storing the data resulting from the setting of the operating time periods and the pause periods for the compressor part 1 as a function of the detected atmospheric (admission) temperatures.
    Now, the operation procedure of the water injection compressor will be explained with reference to FIG. 4.
    For a routine for normal operation, the compressor part 1 activates (step 31). When the daily operating period comes to an end, the compressor part 1 stops (step 32). Then, with the compressor part 1, the timer 10 is used to detect a breakpoint in time (step 33), and the result is stored in a memory device not shown in the drawing. In addition, the atmospheric temperature (inlet air temperature) Ta or the water temperature of the separator Tw is detected (step 34) and the result is stored in the same manner. The resulting atmospheric temperature Ta and the resulting water temperature are used on the basis of the data stored in the memory device to set a toff pause time and a running time duration of the compressor part 1 for the temperature. Ta atmospheric or for water temperature Tw (step 35). Then, the timer 10 is used to detect a point t1 in elapsed time (step 36) and to calculate the duration of the pause time (step 37). If the duration of the pause time exceeds the set time period (step 38), the water injection compressor is activated (step 39).
    When the duration of the pause time does not exceed the set time period, the procedure follows the loop starting at step 34 "sensing the atmospheric (intake) temperature and the water temperature". When the compressor part 1 activates, a start point t2 in time is detected (step 40) and the result is stored. Then, a point t3 in the elapsed time is detected (step 41) and the duration of the operating time is calculated (step 47). The duration of the calculated operation time is compared to the duration of the set operating time (step 42). If the operating time exceeds the set time, the water injection compressor stops (step 43).
    Next, it is decided whether or not the normal activation switch (start switch) of the water injection compressor is depressed to request activation (step 44). If the normal activation switch is depressed, normal continuous operation starts (step 31). If the switch is not pressed, the pause and operation repeat starts for the water quality check (the procedure returns to step 33).
    When, after stopping, the compressor part 1 operates for water quality control, it is desirable that the sterilization effect on the water be increased by operation with a discharge air temperature higher than in normal operation. Concretely, it is normal for the feed water to be cooled by the air-cooled water cooler 4 shown in FIG. 1 before serving for feeding, but the use of the three-way solenoid valve lanes 21 allows the water not to pass through the water cooler 4 and go directly into the compressor part 1. This makes it possible to raise the temperature of the water to a high temperature, adding to the effect of sterilization on the water. Here, operation at a discharge air temperature of 85 ° C or higher (ie the water temperature for discharge takes a similar value) for 15 minutes or more guarantees the sterilization effect on the water.
    It should be noted that, in order for the discharge air temperature to not become too high after reaching a set temperature, it is desirable that the three-way solenoid valve 21 be activated to control the passage and the bypass for what is the water cooler 4 in order to adjust the temperature of the discharge air (water temperature) to a set temperature or that the engine 6 is controlled in the number of revolutions that drives a cooling fan 7 for the air-cooled water chiller 4 in order to change its flow rate and adjust the cooling of the water.
    FIG. 6 shows an embodiment in which the cooling of the water is carried out by a water-cooled water cooler 27. The water in a separator 3 is supplied by the internal pressure of the separator 3 via of a water supply pipe 20, is cooled by the water-cooled water cooler 27 and is sent via a water injection pipe 22 into the compression cavity of a compressor 1.
    The compressor 1 in which water lubricated bearings are used does not have sufficient pressure inside the separator at the time of activation of the compressor 1 for the water quality control, so a pump 29 provided between the water supply line 20 and the water-cooled water cooler 27 gives an increased pressure and supplies the water to the bearings of the water-injection compressor 1. The compressor 1 admits the air through a inlet port 14 having an inlet air filter, compresses the air, discharges the air through a discharge port in the separator 3 via a discharge line 15 together with the water injected during the process of compression. The separator 3 separates the water from the compressed air. The water is stored in the lower part of the separator 3 and is then brought back by the water supply line 20 into the compressor part 1.
    The compressed air is separated by the separator 3, sent by an air discharge line 16 connected to the upper part of the separator 3, cooled by an aftercooler 5, separated from the drainage (water) condensed by a drainage separator 19 and then discharged into a pipe 18.
    At the time of a comparatively long stoppage, for example at night or during holidays, the water-injection compressor 1, as shown in FIG. 2, is automatically activated and operates for a set time of 24 hours for the purpose of water quality control, when it remains at rest longer than a predetermined pause time toff 23. Thereafter, the compressor repeats pause and operation until the injection compressor of water 1 is restarted.
    Pause and operation of the compressor 1 will be explained further with reference to FIG. 6. The water injection compressor comprises a console 9 for operating and controlling the entire unit, which console makes it possible to drive the drive motor 2 of the compressor water injection and the motor for the pump 29. The console 9 also allows to operate a solenoid valve 45 which opens and closes according to the operation of the pump 29 which is used to pressurize the water at start-up time and a three-way solenoid valve 21 for switching between the pipe for cooling the water supplied to the compressor 1 through the water-cooled water cooler 27 and a water injection pipe 22 for supplying directly the compressor 1 in water without cooling the water through the water chiller water cooled 27.
    The inlet port 14 has an atmospheric temperature detection sensor 13 (inlet), a temperature sensor of the separator 11 and a discharge air temperature sensor 12 for detecting the temperature of the the air discharged by the compressor 1 with which the console 9 can detect the temperatures of the parts. In addition, using a timer 10, the console 9 makes it possible to measure a start point in time and a breakpoint in the time of the compressor 1.
    Further, the console, as shown in FIG. 3, is provided with a memory device for storing the data resulting from the setting of the operating time periods and the pause time periods as a function of the detected admission temperatures. Now, the operating procedure of the water injection compressor 1 will be explained with reference to FIG. 4.
    For a routine for normal operation, compressor 1 turns on (step 31). When, at the end of the daily operating period, the supply of compressed air lines stops, the compressor stops (step 32). Then, with the console 9 having a memory device not shown in the drawings, the timer 10 is used to store a breakpoint in the time t0 (step 33) and to detect the atmospheric temperature (air temperature d 'admission) Ta or the water temperature inside the separator Tw (step 34) and store the temperature. The atmospheric temperature Ta or the resulting water temperature Tw is used on the basis of the data stored in the memory device to set a toff pause time and a running time of the compressor 1 for the atmospheric temperature. Ta or for the water temperature Tw (step 35). Then, the timer 10 is used to detect a point t in the elapsed time (step 36). If the duration of the pause time exceeds the set time period (step 38), the water injection compressor is activated (step 39).
    Then a start point in time is detected (step 40) and a point in the elapsed time is detected on a regular basis. If the operating time exceeds the set time, the compressor stops. Then, it is decided whether the compressor 1 has started or not by pressing its normal activation switch (step 44). If the normal activation switch is depressed, normal continuous operation starts (step 31). If the switch is not pressed, the pause and operation repeat starts for the water quality check (the procedure returns to step 33). It should be noted that the control of the temperature of the discharge air is carried out by varying the volume of cooling water in the water cooler 27 by using the solenoid valve 46.
    The compressor 1 is protected against a high discharge temperature because its housing, rotors, bearings and shaft seals have sufficient thermal stability to be used at fixed discharge temperatures. The clearance between rotors, between rotor and housing, and between bearing diameters has sufficient values to ensure that no damage occurs during operation at fixed discharge temperatures. The pipes, the separator, the sealing materials, the solenoid valves and the temperature sensing sensors also have sufficient thermal stability for operation at fixed discharge temperatures.
    As described so far, the water injection compressor stops and then, if it remains stationary for a predetermined period of time, ie a period long enough for bacteria / germs to propagate without that the compressor part 1 is activated, it is activated and stopped normally with the advantage that the absence of water remaining intact for a long period of time in the separator 3, the water pipes and the compressor part 1, as well as high water temperatures prevent bacteria / germs from proliferating in the water inside the separator and in the devices.
    In addition, the atmospheric temperature or the temperature of the separator 3 is detected, and the operating times and their intervals for the water-injection compressor are set in accordance therewith. So, even in summer, a particularly favorable season for the spread of bacteria / germs, it is possible to prevent bacteria / germs from proliferating without fail.
    In addition, in winter when the atmospheric temperature is low, a season unfavorable to the propagation of bacteria / germs, the extension of the interval between the starting points in time for the compressor with water injection has the advantage of save the compressor drive energy required for water quality control.
    In addition, when the water injection compressor is running for water quality control, it is possible that the sterilization effect on the water is further increased by operation with the discharge air temperature. the compressor part 1 greater than a temperature set for normal operation and therefore with the water temperature approximating the discharge temperature. It should be noted that operation for quality control of water at a discharge air temperature of 85 ° C or higher for 15 minutes or more guarantees the effect of sterilization on water.
    In addition, the water injection compressor has the compressor part 1, the separator 3 and the pipes which are composed so as to have a sufficient thermal stability for operation at fixed high discharge temperatures and for fixedly set stops. appropriate. This prevents these main parts of the compressor 1 such as bearings, rotors and housing from expanding and being thermally affected, and thus prevents damage such as deformations and contacts and deterioration of operation such as compression performance decreases. and leaks.
    Now another embodiment of the present invention will be described with reference to Fig. 7. The system shown in Fig. 7 comprising a water injection compressor 1 and its peripheral composition is the same in composition As shown in Fig. 1, in this embodiment, the compressor 1 or the volume control mechanism provided on its periphery performs the volume control. Operating the compressor part 1 implements energy savings during the water quality control. For example, the compressor part 1 has a suction relief device (restriction mechanism) 48 provided on the intake port to limit the volume of air. Decreasing the air intake or compressor 1 reduces the operating capacity of the compressor part 1.
    In addition, when an inverter 49 for supplying alternating current to a motor 2 driving the compressor part 1 to carry out the control of the number of revolutions is used for the water quality control operation, having a the smaller number of revolutions of the engine 2 to drive the compressor part 1 makes it possible to reduce the operating power of the compressor part 1.
    Now another composition relating to water quality control will be explained with reference to FIG. 8. A water purification device 50 employing reverse osmosis membranes is connected by a water make-up line 52 to a separator 3. The water purification device 50 is connected to a water supply line 51 and a drain line 53 for draining water containing salt that is not passed through the osmosis membranes. reverse (not shown in the drawings). Operating the compressor 1 for sterilization, draining the water within the separator through a drain line 54, and also supplying the purified water through the water purification device 50 through the water line. water booster 52 allows to get rid of the water whose quality has deteriorated, to save the compressor running time, reduce the operating capacity of the compressor part 1 and thus to obtain effects energy saving.
    A third composition relating to water quality control will be explained with reference to Fig. 9. An ultraviolet sterilizer 55 is installed midway through the water supply line 20 connected to the separator 3. The ultraviolet sterilizer 55 has a flow path connected to the water supply line 20 and an ultraviolet emitting lamp 57 installed on this flow path for emitting ultraviolet light. The ultraviolet emitting lamp 57 is supplied with electricity by a power source 56 to emit light. The ultraviolet light is directed through an ultraviolet light transmitting portion not shown in the drawing and is emitted into the water passing through the flow path. The sterilization of the water with ultraviolet light saves the operating time of the compressor part 1 and thus obtains energy saving effects.
    References of Figures Figure 2
    Discharge air temperature (° C) Discharge air temperature (° C)
    Time (h) Time (h)
    Figure 3
    Atmosphere (intake) temperature Temperature (intake)
    Ts (° C) atmospheric Ts (° C)
    Pausing time duration toff (h) Duration of pause time toff (h)
    Operating time duration ton (h) Duration of operating time ton (h)
    Figure 4 31 The compressor is activated 32 The compressor stops 33 The break point in the time tO is detected 34 The atmospheric or water temperatures Ta or Tw are detected 35 The duration of the pause time and the time Operating time toff and tone for the atmospheric temperature Ta are obtained 36 The point in time flows t1 is detected 37 The duration of the pause time (t1 - tO) is calculated 38 (t1 - tO)> toff 39 The compressor starts route 40 The start point in time t2 is detected 41 The point in elapsed time t3 is detected 47 The duration of the operating time (t3 -12) is calculated 42 (t3 -12)> tone 43 The compressor stops 44 The compressor turns on
    Figure 5
    Atmosphere (intake) temperature Temperature (intake)
    Ts (° C) atmospheric Ts (° C)
    Pausing time duration toff (h) Duration of pause time toff (h)
    Operating time duration ton (h) Duration of operating time ton (h)
    权利要求:
    Claims (11)
    [1]
    1. Water injection compressor comprising a compressor part in which water is injected and a separator for separating the air discharged by the compressor part of the water injected into the compressor part, in which the compressor part is stopped. and then, if it remains stationary for a predetermined period of time without receiving an activation request, is activated or started and operates for a fixed period of time.
    [2]
    The water injection compressor according to claim 1, which further comprises a sensor for detecting the atmospheric temperature of the air admitted by the compressor part, thus changing the predetermined duration of the pause time and the fixed duration of the dwell time. operation according to the detected atmospheric temperature.
    [3]
    The water injection compressor according to claim 1, which further comprises a sensor for detecting the temperature of the water within the separator, thereby changing the predetermined duration of the pause time and the fixed duration of the dwell time. operation according to the temperature of the water detected.
    [4]
    The water injection compressor according to claim 1, which further comprises a water injection pipe for supplying water to the interior of the separator to the compressor and a water cooler provided between the water pipe. water injection and the separator to cool the water inside the separator, thereby decreasing the cooling volume of the water cooler during the set time of the operating time for the compressor part.
    [5]
    The water injection compressor according to claim 1, which further comprises a sensor for detecting the temperature of the air discharged from the compressor portion, thereby maintaining a discharge air temperature of 85 ° C or higher for 15 minutes or more for the compressor part during the set time of the operating time for the compressor part.
    [6]
    The water injection compressor according to claim 1, which further comprises a water injection pipe for supplying water to the interior of the separator to the compressor and a water cooler provided between the water pipe. water injection and separator for cooling the water inside the separator, wherein the water cooler using external water to cool the water of the separator varies the volume of water sent to the cooler of water to control the water of the separator.
    [7]
    The water injection compressor according to claim 1, wherein after stopping the compressor, if it remains stationary for a predetermined period of time without receiving an activation request, the compressor part is activated and operating. while controlling the compression volume of the compressor part.
    [8]
    The water injection compressor according to claim 7, which further comprises a restriction mechanism at the inlet of the compressor part so as to change the air intake of the compressor.
    [9]
    The water injection compressor of claim 1 which further comprises an inverter for supplying the drive motor with AC power to drive the compressor, thereby controlling the number of revolutions of the drive motor.
    [10]
    The water injection compressor of claim 1, which further comprises a water purification device having reverse osmosis membranes and a water make-up line connecting the water purification device to the separator, wherein after stopping the compressor part, if it remains stationary for a predetermined period of time without receiving an activation request, is activated and operates for a fixed period of time while draining the water inside separator and also bringing the purified water through the water purification device to the separator.
    [11]
    The water injection compressor of claim 1, which further comprises an ultraviolet sterilizer provided for a conduit between the separator and the compressor.
    类似技术:
    公开号 | 公开日 | 专利标题
    BE1018906A3|2011-11-08|COMPRESSOR WITH WATER INJECTION.
    WO1990007061A1|1990-06-28|Pumping system for obtaining high vacuum
    FR2934087A3|2010-01-22|Battery cooling system for e.g. car, has battery cooling circuit including cooling fluid inlet with connection unit that permits sealed connection/disconnection of cooling circuit to/from external cooling fluid source, in alternate manner
    FR2473912A1|1981-07-24|High-pressure cleaning appts. - has fuel pump and burner and is compact with drive motor cooled by cold cleaning fluid
    FR2936980A1|2010-04-16|MOTOR VEHICLE WITH ELECTRIC MOTOR COMPRISING A COOLING CIRCUIT OF THE ELECTRONIC POWER CIRCUIT CONNECTED TO A HEATING RADIATOR OF THE HABITACLE
    FR2956153A1|2011-08-12|DEVICE FOR MONITORING A LOW FREEZING WORK FLUID CIRCULATING IN A CLOSED CIRCUIT OPERATING ACCORDING TO A RANKINE CYCLE AND METHOD USING SUCH A DEVICE
    FR2579305A1|1986-09-26|APPARATUS FOR COOLING THE ENGINE OF A REFRIGERATOR
    FR2910561A1|2008-06-27|FUEL SUPPLY SYSTEM OF AN INTERNAL COMBUSTION ENGINE
    EP0886724B1|2002-04-03|Method and installation for recuperating heat in the surcharging air of an engine
    JP4774351B2|2011-09-14|Water jet compressor
    JP4350136B2|2009-10-21|Water jet compressor
    FR2909713A1|2008-06-13|Temperature control system for engine, has cooling circuits with control valves that are controlled by eurotherm regulators depending on temperature of coolant, where heat exchangers are mounted in series in engine coolant circuit
    FR2909410A1|2008-06-06|Oil supply system for internal combustion engine, has two pumps for supplying oil to lubrication system and nozzles, respectively, where lubrication system includes supplementary by-pass circuit connecting one pump to nozzles
    JP5049811B2|2012-10-17|Water lubrication compressor
    FR3050486A1|2017-10-27|METHOD FOR LIMITING THE FUEL LEAKAGE OF AN INJECTOR AFTER THE MOTOR STOPPING BY FORCE COOLING OF THE INJECTION RAIL
    EP3682174A1|2020-07-22|Method for starting a coolant fluid circuit comprising a liquid pump
    FR2934672A1|2010-02-05|METHOD FOR FREEZING A HEAT GENERATION SYSTEM AND ASSOCIATED HEAT PRODUCTION PLANT
    EP0629037B1|2001-08-29|Power supply control process and device for an electric asynchronous motor
    US20180010554A1|2018-01-11|System and method for operating a cryogenic fuel system
    EP1682368A1|2006-07-26|Device for storing cold for an evaporator
    FR3026142A1|2016-03-25|OXYGEN SENSOR DIAGNOSTIC SYSTEM
    BE1015817A3|2005-09-06|Safety device and control compressor machine cooling.
    FR3071913A1|2019-04-05|HEAT PUMP AND METHOD OF OPERATION
    FR2635146A1|1990-02-09|METHOD FOR IMPROVING THE PROFITABILITY OF A PRESSURE SYSTEM OR THE LIKE
    FR2983282A1|2013-05-31|Refrigeration installation for cooling e.g. cold room, for preserving perishable goods i.e. milk, has light radiation sensor controlling operation of compressors of refrigerating units in accordance with light radiation
    同族专利:
    公开号 | 公开日
    US8459957B2|2013-06-11|
    US20080089795A1|2008-04-17|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    EP0974754A2|1998-07-23|2000-01-26|Ishikawajima-Harima Heavy Industries Co., Ltd.|Screw compressor|
    JP2000045948A|1998-07-23|2000-02-15|Ishikawajima Harima Heavy Ind Co Ltd|Water jet type air compressor and water quality control method|
    JPH07117052B2|1991-04-12|1995-12-18|株式会社神戸製鋼所|Oil-free injection type screw compressor|
    US5240179A|1991-11-22|1993-08-31|Drinkwater Don L|Anti-freeze assist apparatus|
    JP3593365B2|1994-08-19|2004-11-24|大亜真空株式会社|Variable helix angle gear|
    US5544645A|1994-08-25|1996-08-13|Lennox Industries Inc.|Combination water heating and space heating apparatus|
    DE4447097A1|1994-12-29|1996-07-04|Guenter Kirsten|Compressor system|
    US8758720B2|1996-08-12|2014-06-24|Debasish Mukhopadhyay|High purity water produced by reverse osmosis|
    JP2000240573A|1999-02-16|2000-09-05|Hokuetsu Kogyo Co Ltd|Circulation water circulating circuit for water injection compressor|
    WO2005042947A1|2003-10-30|2005-05-12|Alstom Technology Ltd|Method for operating a power plant|
    EP1684014A1|2004-12-01|2006-07-26|Riello S.p.a.|Method of controlling operation of a liquid-fuel combustion appliance|JP5236619B2|2009-11-30|2013-07-17|株式会社日立産機システム|Injection scroll air compressor|
    JP5542468B2|2010-02-10|2014-07-09|株式会社日立産機システム|Water-injected scroll air compressor|
    US10975807B2|2017-05-04|2021-04-13|Clark Equipment Company|Source of water for water injection system|
    法律状态:
    2020-05-29| MM| Lapsed because of non-payment of the annual fee|Effective date: 20190831 |
    优先权:
    申请号 | 申请日 | 专利标题
    JP2006280869A|JP4774351B2|2006-10-16|2006-10-16|Water jet compressor|
    JP2006280869|2006-10-16|
    JP2007090131|2007-03-30|
    JP2007090131A|JP4350136B2|2007-03-30|2007-03-30|Water jet compressor|
    [返回顶部]