• 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 a pyrotechnic separation device for an air conditioner, in particular for an automotive air conditioning system with high-pressure refrigerant, for separating a line of a refrigerant circuit. The separating device comprises a housing (2) which tightly encloses a line (1) and has a cylinder (11) oriented substantially normal to the longitudinal axis of the line, in which a piston (12) is displaceably held, one side of which is displaceable by one Igniter (3) activatable propellant (4) can be acted upon, wherein the cylinder (11) when pushing the line (1) severed. The piston (12) has a through bore (8) which, when the piston (12) is fully extended, is aligned at least with a portion of the clear width from one side of the separate conduit (1a).
    公开号:AT516243A1
    申请号:T50588/2014
    申请日:2014-08-26
    公开日:2016-03-15
    发明作者:
    申请人:Hirtenberger Automotive Safety；
    IPC主号:
    专利说明:

    The invention relates to a pyrotechnic Trenneinrich¬ tung for an air conditioner, in particular for an automotive air conditioning system with high-pressure refrigerant, for separating a line of a refrigerant circuit.
    Air conditioning systems are currently often using R134a refrigerant, which as a fluorinated hydrocarbon, unlike previously used CFCs - does not destroy the ozone layer but is a very powerful greenhouse gas. The impact on global warming is 1400 times that of CO2. Because the air conditioners have tiny leaks and also release small amounts when filling the systems, the automotive industry is looking for alternatives. This one believed to have found in the R1234yf, a flourished propene. This gas also does not harm the ozone layer, and the CO 2 equivalent is only 4.4 times. In various tests, however, it has been found that R1234yf can release flammable hydrogen and thus pose a risk.
    These refrigerants are usually applied only low pressures, so that no nennennen dangerous moments due to the pressure conditions erge¬ben in automotive air conditioning.
    An alternative to the mentioned refrigerants is the use of CO 2 under high pressure. The gas is not flammable and, on release, is not particularly harmful. At present, the use of CO2 as a cooling medium is the major trend in the automotive future air conditioning sector. Due to the high pressures required by the use of CO2, it is necessary to provide a means for the automotive air conditioning systems to withstand the high pressure in the event of an accident to break down quickly. Opening and separating systems for gas or liquid-filled piping systems are widely known, but these are either very expensive or squeeze the lines to bring about their crack or break, so as to achieve a separation of the line. However, arises when squeezing the line of
    Disadvantage that their cross section is considerably reduced and then usually not sufficient for a sufficiently rapid reduction of the pressure.
    The aim of the invention is to avoid these disadvantages and to propose an air conditioning system of the kind mentioned in the introduction, which enables a rapid and reliable reduction of the pressure of the refrigerant when needed and which is characterized by a simple structure.
    This object is achieved in an air conditioning system of the type mentioned in the introduction in that the separating device comprises a housing enclosing a pipe, which has a cylinder oriented substantially normal to the longitudinal axis of the pipe, in which a piston is displaceably held, one side of which is pressurized by an igniter can be acted upon, wherein the piston when pushed through the line and wherein the piston has a through bore, which is aligned with fully extended piston at least a portion of the clear width of one side of the separate line.
    By the proposed measures it is achieved that the line comprised by the housing is cut through and one of the separated parts is pushed away by the piston, while in the other part the gas pressure can be rapidly reduced through the bore in the piston. Since the separation cut is very rapid due to the pyrotechnic blowing agent, a significant reduction in the cross section of the pipe is avoided. In addition, a change in the cross section of the section of the line encompassed by the housing is prevented by this encompassing. The enclosure does not have to be complete in this case, if the main part is included, the effect also occurs.
    It is a further feature of the invention that the piston on its side facing away from the igniter has a substantially guerzur to the longitudinal axis of the line extending cutting edge, which interacts with a counter edge of the housing like a scissor. Thus, a clear cutting edge can be defined in a very simple manner, which smoothly divides the line and at the same time pushes away the part of the line which is not encompassed by means of the piston, whereby the pressure can be rapidly reduced even in this line section.
    According to a further feature of the invention it is provided that the diameter of the bore corresponds approximately to the inner diameter of the conduit enclosed by the housing. As a result, when the piston is pushed out, the bore is fully flush with the clear width of the included and severed conduit, whereby the pressure in the conduit can be relieved as quickly as possible.
    Further, it is a feature of the invention that in the conduit-facing end portion of the cylinder there is provided a projection projecting into its clear space, which serves as a guide for the piston so that it is non-rotatable in the cylinder. As a result, this can not cause any rotation of the piston during operation, the functionality of the separating device is ensured.
    It is a further feature of the invention that the housing is fixedly connected, preferably soldered or welded, to the conduit of the air conditioning system so that the housing remains connected to one side of the conduit even after separation of the conduit. This results in a secure connection between the cable and the housing and a secure connection to the electric vehicle ground.
    Specifically in this case, the electrical ground connection can be made via the line so that the electrical connection cable requires less wire.
    According to a further feature of the invention it is provided that the piston is secured in the cylinder in its starting position, for example by a shearing element. By virtue of this feature, unwanted movements due to vibrations can be avoided.
    It is also a feature of the invention that a propellant charge is provided in the cylinder on the lighter side of the piston. If the force for complete separation of the line through the igniter alone is not sufficient, the provision of a propellant charge can increase the force acting on the piston to be ejected or extend the force duration of action.
    In order to be able to produce the separating device in a simple, cost-effective manner, a further feature of the invention is that the housing is made of aluminum, an aluminum alloy or of steel.
    Further, in order to minimize the cost of materials, it is a feature of the invention that the piston is made in multiple parts and the part facing the propellant is made of plastic and a cutting element having the cutting edge made of metal or ceramic. In this case, the cutting edge can be encapsulated with plastic in order to form the piston held in the cylinder.
    Finally, a feature of the invention is that the igniter is a plastic lighter or primer to further reduce the overall production cost of the separator.
    In order to avoid misfires, it is appropriate to use at least one EMC protection measure, e.g. a ferrite core, a coil or a twisted wire to provide.
    The electrical contacting can via a cable with Steckererfolgen or via a plug connection to the separating device.
    The invention will now be explained in more detail with reference to the drawings.
    1 shows a section through a Trenneinrich¬tung invention, and
    2 shows a section along the line II-II in Fig. 1st
    The line 1 is comprised of a two-part housing 2, des¬sen parts 9a, 9b are connected to each other by means of screws 10 and clamp the line 1, whereby an electrical connection to the vehicle ground is given.
    But it is also possible to carry out the housing in one piece and provide for receiving the line 1 a bore and to solder the Ge¬ housing with the line or to weld.
    In this case, the housing 2 has a cylinder 11 in which a piston 12 is held tightly but displaceably. This piston 12 has a cutting element 5, which is provided with a transverse to the longitudinal direction of the line 1 extending flat surface 13, which forms the cutting edge 14 at its lower end. Further, a bore 8 extending perpendicularly to the flat surface 13 is provided whose diameter substantially corresponds to the clear diameter of the conduit 1 (see FIG. 2).
    The piston 12 is sealed by means of a 0-ring 6 held in an annular groove 7 and has at its end facing away from the cutting element 5 an end-side recess 15, in the initial position of a blowing agent 4 is added. When an impeller 3 with current is arranged above the piston 12, the propellant 4 burns off and the piston 12 together with the cutting element 5 is driven against the line 1 and divides it into two parts 1a, 1b.
    As can be seen from Fig. 1, the cutting element 5 cooperates with the housing part 9b, which has a counter edge 18 to the cutting edge 14, similar to a striking shear.
    In order on the one hand to assure a correct assembly of the piston 12 and to prevent twisting of the piston 12 in the cylinder 11, the housing part 9a has at its end facing the line 1 a shoulder 16 which projects into the clear transverse direction section of the cylinder 11 protrudes and has a surface 17 on which the flat surface 13 of the cutting element 5 abuts.
    If the separator is triggered, the igniter 3 ignites the propellant 4 and this burns off, which is driven due to the associated expansion of the resulting gases, the piston 12 against the line 1 and the cutting element, the line 1 is severed. In this case, the one line section lb ausgeo¬gen and the bore 8 of the cutting element 5 comes in one with the other section la of the line 1, which is firmly enclosed by the housing 2, aligned position, whereby a rapid outflow of the guided in the conduit 1 refrigerant can take place.
    权利要求:
    Claims (14)
    [1]
    Claims 1. A pyrotechnic divider for an air conditioner, in particular for an automotive air conditioner with high pressure refrigerant, for separating a duct of a refrigerant circuit, characterized in that the divider comprises a housing (2) enclosing a duct (1) which has a housing Has substantially normal to the longitudinal axis of the line oriented cylinder (11) in which a piston (12) is slidably held, one side of which is acted upon by a detonator (3) with pressure, said piston (12) when pushed out the line (1 ) and wherein the piston (12) has a through bore (8) which, when the piston (12) is fully extended, is aligned with at least a portion of the clear width from one side of the separate conduit (1a).
    [2]
    2. Pyrotechnic separating device according to claim 1, characterized in that the piston (12) on its side facing away from the igniter (3) has a substantially transverse to the longitudinal axis of the line extending cutting edge (14) with a mating edge (16) of the Housing (2) schlagsche¬renartig cooperates.
    [3]
    3. Pyrotechnic separating device according to claim 1 or 2, characterized in that the diameter of the bore (8) corresponds approximately to the inner diameter of the housing (2) enclosed line (1).
    [4]
    4. Pyrotechnic separating device according to one of claims 1 to 3, characterized in that in the line (1) facing the end portion of the cylinder (11) projecting into a clear space projection (16) is provided which serves as a guide for the piston (12). serves, so that this in Zy¬linder (11) is non-rotatable.
    [5]
    5. Pyrotechnic separating device according to one of claims 1 to 4, characterized in that the housing (2) with the line (1) of the air conditioning is firmly connected, preferably soldered or welded, so that the housing (2) even after separation of the line (1) one side of the line (la) remains connected.
    [6]
    6. Pyrotechnic separating device according to one of claims 1 to 5, characterized in that the electrical ground connection via the line (1).
    [7]
    7. Pyrotechnic separating device according to one of claims 1 to 6, characterized in that the piston (12) in the cylinder (11) is secured in its initial position, for example by a shearing element.
    [8]
    8. Pyrotechnic separating device according to one of claims 1 to 7, characterized in that in the cylinder (11) on the igniter side of the piston (12) a propellant charge is provided.
    [9]
    9. Pyrotechnic separating device according to one of claims 1 to 8, characterized in that the housing (2) is made of aluminum, an aluminum alloy or made of steel.
    [10]
    10. Pyrotechnic separating device according to one of claims 1 to 9, characterized in that the piston (2) is mehrtei¬lig formed and the blowing means (3) facing part of plastic and the cutting edge (14) aufwei¬sendes cutting element (5) Metal or ceramic herge¬stellt.
    [11]
    A pyrotechnic separator according to any one of claims 1 to 10, characterized in that the igniter (3) is a plastic lighter or a squib.
    [12]
    12. Pyrotechnic separating device according to one of claims 1 to 11, characterized in that at least one EMC protection measure, e.g. a ferrite core, a coil or a twisted wire, is provided.
    [13]
    13. Pyrotechnic separating device according to one of claims 1 to 12, characterized in that the electrical Kon¬taktierung via a cable with plug.
    [14]
    14. Pyrotechnic separating device according to one of claims 1 to 12, characterized in that the electrical Kon¬taktierung via a plug connection to the Trenneinrich¬tung.
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    同族专利:
    公开号 | 公开日
    AT516243B1|2017-04-15|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE2343025A1|1973-07-20|1975-02-06|Cbf Systems Inc|SHEAR VALVE WITH DESTRUCTIBLE CONNECTOR|
    DE19615319C1|1996-04-17|1997-03-20|Daimler Benz Ag|Safety device for automotive air-conditioning system|
    DE102006004781A1|2006-02-02|2007-08-09|Thomas Magnete Gmbh|Expansion valve for air conditioning|
    EP2020548A1|2007-08-02|2009-02-04|Autoliv ASP, INC.|Flameless relief valve|US11079042B2|2018-08-29|2021-08-03|Ford Global Technologies, Llc|Motor vehicle component displacement limiting system and method|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    ATA50588/2014A|AT516243B1|2014-08-26|2014-08-26|Pyrotechnic separator for an air conditioning system|ATA50588/2014A| AT516243B1|2014-08-26|2014-08-26|Pyrotechnic separator for an air conditioning system|
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