• 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 evaporator (12) for a motor vehicle air-conditioning device comprises at least one refrigerating tube (22, 22A) intended to allow the circulation of a cooling fluid and at least one storage member (10) comprising at least one housing ( 16, 20) comprising a so-called thermal storage material (21) for storing frigories and returning them to a ventilation fluid intended to circulate towards a passenger compartment of the vehicle. The housing (16) has a substantially hemispherical shape.
    公开号:FR3025873A1
    申请号:FR1458772
    申请日:2014-09-17
    公开日:2016-03-18
    发明作者:Lionel Robillon；Sylvain Moreau；Aurelie Bellenfant；Julien Tissot
    申请人:Valeo Systemes Thermiques SAS；
    IPC主号:
    专利说明:

    [0001] The invention relates to an evaporator for an air conditioning device of a motor vehicle. The evaporator, connected to the rest of the air conditioning circuit of a motor vehicle, has the function of cooling a ventilation fluid intended to be blown inside a passenger compartment of the vehicle. Generally the ventilation fluid is air from outside the vehicle. The evaporator thus comprises a plurality of refrigerant tubes within which a refrigerant fluid circulates. In contact with these refrigerant tubes, the ventilation fluid gives some of its calories to the refrigerant tubes and is therefore cooled. The circulation of the fluid inside the air conditioning circuit is provided by a compressor driven most often by a motor vehicle engine. Therefore, when the engine of the vehicle is stopped, the flow of refrigerant in the device no longer occurs and the heat exchange between the air and the refrigerant can not operate. The air blown into the passenger compartment of the vehicle is then no longer refreshed. This situation is all the more problematic because fuel economy systems provide for the automatic shutdown of the engine when the car comes to a standstill, thus preventing the air conditioning device from operating. It is known to provide the evaporator with a reservoir of thermal storage material. During engine operation, the refrigerant circulating inside the evaporator simultaneously cools the air flowing through the evaporator and the thermal storage tank. When the engine is stopped, the thermal storage material restores the previously accumulated frigories to cool the air passing through the evaporator. It is recalled that, by analogy with the calorie, the frigory corresponds to the amount of heat necessary to lower the temperature of 1 gram of water by 1 ° C. from 14.5 to 15.5 ° C. under normal atmospheric pressure. It is also known to use, as thermal storage material, a phase change material designated by the acronym PCM, for "phase change material". When the PCM is in contact with the coolant, it solidifies. When the engine is stopped, the PCM liquefies and therefore gives cold air through the evaporator. It is known to arrange the PCM in tubes with checkerboard geometry associated with cooling tubes also arranged in checkerboard. But, because of this arrangement, the pressure distribution within the tubes is heterogeneous. It is therefore necessary to make thicker tubes to support this pressure difference, which makes the evaporator heavier. Also known from applications US-2010 307 180, JP-2011 201 328 and 3025873 -2- JP-2012 037 900, examples of evaporators provided with storage members comprising pluralities of housing forming storage tanks. phase change material. The disclosed evaporators have the disadvantage that they do not homogeneously and completely solidify the PCMs in a sufficiently short time when the vehicle engine is running. Thus, the PCM may not be fully solidified when the vehicle stops, for example at a red light, and does not ensure the cooling of the air blown into the passenger compartment for a sufficient duration. In addition, the heat exchange between the refrigerant fluid and the housing reservoirs of 10 PCM are inefficient, so it is necessary to provide the PCM tanks with fins to improve the efficiency of heat transfer. These fins weigh down the evaporator. In addition, because of the arrangement of the PCM tanks in the evaporator, the ventilation fluid undergoes mechanical friction during the passage of the evaporator. These mechanical friction results in load losses. An object of the invention is therefore to overcome these disadvantages. To do this, according to the invention there is provided an evaporator for a motor vehicle air-conditioning device comprising at least one refrigerant tube intended to allow the circulation of a refrigerant fluid and at least one storage member comprising at least one housing comprising a so-called thermal storage material for storing frigories and returning them to a ventilation fluid intended to flow to a passenger compartment of the vehicle, characterized in that the housing has a substantially hemispherical shape. According to the commonly accepted thermodynamic model of solidification, a spherical solid seed grows in the liquid. This is why, with a housing of hemispherical shape, the solidification of the thermal storage material is carried out homogeneously and quickly. It is no longer necessary to insert fins into the PCM tanks. Preferably, the ventilation fluid is air.
    [0002] This is the most commonly used ventilation fluid. According to one embodiment, the thermal storage material comprises a phase change material. With such a material, the solid / liquid phase change takes place over a restricted temperature range. It is then necessary to provide little energy to effect the solidification. Advantageously, at least one wall of the refrigerant tube forms a wall of the housing. A single wall then separates the PCM and the refrigerant, heat transfer is more efficient. The evaporators described in the applications US-2010 307 180, JP-2011 201 328 and JP-2012 037 900 present cooling tubes arranged partially in contact with PCM tanks. In particular, the evaporator described in the application US-2010 307 180 comprises tanks of thermal storage material whose section is of variable size. Thus, the reservoir is not systematically in contact with the refrigerant tube and the heat transfer is therefore not optimal. In addition, in the evaporators of the prior documents, two walls separate the coolant from the PCM, which decreases the efficiency of the heat transfer. Preferably, the member has at least two housings, the housing being interconnected in fluid communication. The risks of overpressure within a single dwelling are thus limited. According to one embodiment, the housings are interconnected by means of a connecting channel. Advantageously, the ratio between the radius of a housing and a dimension of the connecting channel connecting this housing to the other housing is between 0.5 and 1. When this ratio is close to 0.5, it is found that the solidification is done quickly.
    [0003] According to one embodiment, each housing has a substantially hemispherical shape. Preferably, the radius of a housing is different from that of the other housing. Advantageously, the storage member comprises a plurality of housings distributed at the nodes of a regular network. The dwellings then form a regular distribution in the space. This regular distribution can be characterized by its elemental mesh. The elemental mesh is the simplest housing distribution that is repeated throughout the storage organ. In the two-dimensional space, one knows in particular the networks of the orthorhombic type, possibly centered, tetragonal or hexagonal.
    [0004] Thus, the pressure drop of the air passing through the evaporator is limited to 30% with respect to an evaporator without a tank of thermal storage material. According to the invention, provision is also made for an air-conditioning device for a motor vehicle characterized in that it comprises an evaporator as described above. One embodiment of the invention will now be described, by way of nonlimiting example, with the aid of the following figures: FIG. 1 is a perspective view of a storage member of the invention; - Figure 2 is a perspective view in section of a housing comprising the thermal storage material; and FIG. 3 is a sectional view of a portion of an evaporator carrying a storage member according to a variant of the embodiment of the invention; FIG. 4 is a perspective view of an evaporator comprising several members; storage, according to the invention. FIGS. 1 to 3 show a storage unit 10 for an evaporator 12 for a motor vehicle air conditioning device according to a first embodiment of the invention. The storage member 10 is in the form of a plate and comprises two orifices 14 for connecting the member 10 to the other elements forming the evaporator 12 by means of conventional assembly means (not shown). As can be seen in particular in FIGS. 1 and 2, the storage member 10 comprises a plurality of housings 16 having a substantially hemispherical shape and interconnected in fluid communication by means of connecting channels 18. fluidic communication two adjacent dwellings 16. Along the axis (XX ') extending transversely to the storage member 10, the height of the connecting channel 18 is smaller than the radius of the housings 16. In this embodiment, the hemispherical housings 16 have the same radius, here 3.5 millimeters. According to a variant of the present embodiment, at least two hemispherical housings have radii which differ. Here, the ratio between the radius of a housing 16 and the dimension along the axis (XX ') of the connecting channel 18 is 0.5 but according to variants, this radius is between 0.5 and 1. From more, the plurality of housings 16 is distributed to the nodes of a regular network said hexagonal primitive by analogy with the networks of Bravais. According to variants, the housings 16 are distributed in another type of regular one-dimensional, two-dimensional or even three-dimensional network. The size and the distribution of the housings 16 have been designed taking into account the shaping constraints of the aluminum which is the material from which the storage member 10 is produced. Aluminum is a light material and consequently due to the absence of fins in the housings 16, the weight of the evaporator 12 is relatively low. In addition, the shape of the housings 16 and their distribution in the storage member 10 are intended to limit the pressure drop experienced by a ventilation fluid passing through the evaporator 12. Here, the pressure drop does not exceed 30 % compared to a similar evaporator without storage member 10, or to an evaporator having storage members distributed approximately every four tubes. In this embodiment of the invention, each housing 16 of the storage member 10 has a substantially hemispherical shape. According to a variant illustrated in FIG. 3, housings 16 of substantially hemispherical shape are connected to other housings 20 which have substantially semi-ellipsoidal shapes. The housings 16 or 20 are intended to store frigories. To do this, the housings 16, 20 and the connecting channels 18 are filled with a so-called thermal storage material which is here a phase-change material (or PCM) 21 of a type known per se. The evaporator 12 also comprises a plurality of refrigerant tubes 22 in which a refrigerant circulates. This fluid may in particular be of the HFO1234yf type or any other refrigerant fluid suitable for use in air conditioning devices of a motor vehicle. The evaporator 12 further comprises a plurality of rows of fins 24. Each row of vane 24, sometimes called corrugated spacer, is positioned, along the axis (XX '), next to at least one tube 22. These fins extend between two tubes 22, 22A of refrigerant as the storage member 10.
    [0005] FIG. 4 shows an evaporator 12 comprising a plurality of storage members 10. The storage members 10 are regularly arranged along the axis (XX ') between two refrigerating tubes 22. During the operation of the air conditioning device , the ventilation fluid, here air coming from outside the vehicle, passes through the rows of fins 24. If the engine 20 of the vehicle is in operation, the refrigerant circulates throughout the air conditioning device. The coolant therefore arrives cold in the evaporator 12 and then gives air frigories which passes through the rows of fins 24. The cooled air then flows to the passenger compartment of the vehicle which can thus be air conditioned. At the same time, the refrigerant gives up some of its frigories to the PCM, which solidifies. Due to the shape of the housings 16, 20, the solidification is fast and homogeneous. Moreover, since solidification is an exogenous process, the PCM is therefore a "reservoir of frigories". The heat transfer, especially between the refrigerant tube 22A and the housings 16, 20 is all the more effective that, as seen in Figure 3, a wall 26 defining the refrigerant tube 22A is also a wall defining the housing 16 , 20. Thus, only a partition separates the tube 22A and the housings 16, 20. In addition, since the wall 26 is common to the housing 16, 20 and the refrigerant tube 22A, over the entire surface of the wall 26, the PCM is in contact with the refrigerant tube 22A which also substantially improves the heat transfer efficiency between the PCM and the coolant inside the tube 22A. When the vehicle engine is not running due to a short stop of the vehicle, and a user of the vehicle actuates the air conditioning device, the PCM of housing 16, 20 liquefies . As the liquefaction is endothermic, the PCM gives up the accumulated frigories during solidification to the coolant of the refrigerant tubes 22, 22A. The cooling liquid cools and in turn gives rise to air frigories flowing through the rows of fins 24. The cooled air is then blown into the passenger compartment of the vehicle that it is cooling. Of course, we can make many changes to the invention without departing from the scope thereof. In particular, it is possible to modify the shape or arrangement of the fins, to vary the arrangement of the storage members 10 and the refrigerant tubes 22 relative to one another within the evaporator 12. It will also be possible to use various regular patterns during the arrangement of the housings 16, 20 of the storage member 10.
    权利要求:
    Claims (11)
    [0001]
    REVENDICATIONS1. Evaporator (12) for a motor vehicle air-conditioning device comprising at least one refrigerating tube (22, 22A) intended to allow the circulation of a refrigerant fluid and at least one storage member (10) comprising at least one housing (16, 20) comprising a so-called thermal storage material (21) for storing frigories and returning them to a ventilation fluid intended to circulate towards a passenger compartment of the vehicle, characterized in that the housing (16) has a substantially hemispherical shape.
    [0002]
    2. Evaporator (12) according to the preceding claim, wherein the ventilation fluid is air.
    [0003]
    An evaporator (12) according to at least one of the preceding claims, wherein the thermal storage material (21) comprises a phase change material (21).
    [0004]
    Evaporator (12) according to at least one of the preceding claims, wherein at least one wall (26) of the refrigerant tube (22A) forms a wall (26) of the housing (16, 20).
    [0005]
    5. Evaporator (12) according to at least one of the preceding claims, wherein the member (10) has at least two housings (16, 20), the housings (16, 20) being interconnected in fluid communication. . 25
    [0006]
    6. Evaporator (12) according to the preceding claim, wherein the housings (16, 20) are interconnected by means of a connecting channel (18).
    [0007]
    7. Evaporator (12) according to the preceding claim, wherein the ratio between the radius of a housing (16, 20) and a dimension of the connecting channel (18) connecting this housing (16, 20) to the other housing (16, 20) is between 0.5 and 1.
    [0008]
    An evaporator (12) according to at least one of claims 5 to 7, wherein each housing (16, 20) is substantially hemispherical in shape. 35
    [0009]
    Evaporator (12) according to at least one of the preceding claims, wherein the radius of a housing (16, 20) is different from that of another housing (16, 20).
    [0010]
    An evaporator (12) according to any one of the preceding claims, wherein the storage member (10) comprises a plurality of housings (16, 20) distributed at the nodes of a regular network.
    [0011]
    11. An air conditioning device for a motor vehicle characterized in that it comprises an evaporator (12) according to at least one of the preceding claims.
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    同族专利:
    公开号 | 公开日
    FR3025873B1|2016-12-23|
    JP2017532519A|2017-11-02|
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    EP3194877A1|2017-07-26|
    ES2699361T3|2019-02-08|
    US20170253103A1|2017-09-07|
    WO2016042048A1|2016-03-24|
    EP3194877B1|2018-08-29|
    CN107110617A|2017-08-29|
    KR20170059455A|2017-05-30|
    引用文献:
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    DE102007048416A1|2007-10-09|2009-04-16|Ingenieurtechnik-Vritex Gmbh|Ice storage for use in industrial refrigerating system, has heat exchange line provided at heat exchange unit, where heat exchange line includes deflections, and heat exchange surface of heat exchange unit is small|
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    WO2013125533A1|2012-02-23|2013-08-29|サンデン株式会社|Cold storage heat exchanger|WO2017212198A1|2016-06-10|2017-12-14|Hutchinson|Heat exchanger-accumulator|
    WO2017212201A1|2016-06-10|2017-12-14|Hutchinson|Method for heat exchange and conditioning of a heat exchanger|
    WO2018134442A1|2017-01-23|2018-07-26|Valeo Systemes Thermiques|Heat exchanger, in particular evaporator, having a reservoir of phase change material|
    WO2018234452A1|2017-06-22|2018-12-27|Valeo Systemes Thermiques|Method of manufacturing a heat exchanger having a reservoir for phase change material comprising a tab for retaining and closing off a filling tube, and a corresponding heat exchanger|JP4122608B2|1998-12-10|2008-07-23|株式会社デンソー|Refrigerant evaporator|
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    DE102009034655A1|2009-07-24|2011-01-27|J. Eberspächer GmbH & Co. KG|Latent heat storage|
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    JP2012247093A|2011-05-26|2012-12-13|T Rad Co Ltd|Flat tubes for header-plate-less heat exchanger|
    JP5868088B2|2011-09-15|2016-02-24|株式会社ケーヒン・サーマル・テクノロジー|Cooling unit for vehicle air conditioner|
    US9046287B2|2013-03-15|2015-06-02|Whirlpool Corporation|Specialty cooling features using extruded evaporator|
    FR3007514B1|2013-06-20|2017-12-15|Valeo Systemes Thermiques|PHASE CHANGE MATERIAL TANK TUBE FOR HEAT EXCHANGE BEAM, IN PARTICULAR FOR EVAPORATOR OF A VEHICLE AIR CONDITIONING CIRCUIT|WO2016194656A1|2015-05-29|2016-12-08|カルソニックカンセイ株式会社|Heat exchanger|
    CN107860255A|2017-10-26|2018-03-30|珠海格力电器股份有限公司|Regenerative apparatus and air conditioner|
    法律状态:
    2015-09-30| PLFP| Fee payment|Year of fee payment: 2 |
    2016-03-18| PLSC| Search report ready|Effective date: 20160318 |
    2016-09-28| PLFP| Fee payment|Year of fee payment: 3 |
    2017-09-29| PLFP| Fee payment|Year of fee payment: 4 |
    2018-09-28| PLFP| Fee payment|Year of fee payment: 5 |
    2019-09-30| PLFP| Fee payment|Year of fee payment: 6 |
    2020-09-30| PLFP| Fee payment|Year of fee payment: 7 |
    2021-09-30| PLFP| Fee payment|Year of fee payment: 8 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1458772A|FR3025873B1|2014-09-17|2014-09-17|EVAPORATOR STOCKEUR WITH DESIGN WAFER PLATES FACILITATING PCM FREEZING|FR1458772A| FR3025873B1|2014-09-17|2014-09-17|EVAPORATOR STOCKEUR WITH DESIGN WAFER PLATES FACILITATING PCM FREEZING|
    PCT/EP2015/071265| WO2016042048A1|2014-09-17|2015-09-16|Storage evaporator with corrugated plate design facilitating the freezing of the pcm|
    KR1020177010164A| KR20170059455A|2014-09-17|2015-09-16|Storage evaporator with corrugated plate design facilitating the freezing of the pcm|
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    US15/512,384| US10131198B2|2014-09-17|2015-09-16|Storage evaporator with corrugated plate design facilitating the freezing of the PCM|
    CN201580060956.3A| CN107110617A|2014-09-17|2015-09-16|The storage evaporator of corrugated plating design with the freezing for contributing to phase-change material|
    EP15763609.3A| EP3194877B1|2014-09-17|2015-09-16|Storage evaporator with corrugated plate design facilitating the freezing of the pcm|
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