JP6493231B2 - Air conditioner for vehicles - Google Patents

Description

  The present invention relates to a vehicle air conditioner that adjusts the temperature of air and blows it out into a passenger compartment.

  2. Description of the Related Art A vehicle air conditioner that is installed in a vehicle interior and blows air into the vehicle interior is known. In such a vehicle air conditioner, the temperature of the air blown out is adjusted by a heat exchanger or the like in order to maintain the temperature in the passenger compartment at a value comfortable for the passenger.

  For example, the following Patent Document 1 describes a vehicle air conditioner that is attached to a ceiling of a passenger compartment and cools air by an evaporator. The evaporator is a heat exchanger that exchanges heat between the refrigerant flowing through the internal flow path and the air passing through the outer surface. The flow path in the evaporator is supplied with a refrigerant whose temperature has been reduced by passing through a condenser or an expansion valve after being compressed by a compressor. The low-temperature liquid-phase refrigerant flowing in the evaporator takes heat from the air and vaporizes it, thereby cooling the air. The air thus cooled and lowered in temperature is blown into the passenger compartment, thereby cooling the passenger compartment.

JP 2002-331819 A

  In the vehicle air conditioner described in Patent Document 1, when the ceiling of the passenger compartment is exposed to strong solar radiation in summer or the like, the vehicle air conditioner that has received heat moving from the ceiling becomes high temperature. As a result, there has been a problem that the evaporator cannot properly cool the air.

  As a countermeasure to such a problem, for example, a heat insulating material may be disposed between the ceiling and the vehicle air conditioner to suppress heat transfer from the ceiling to the vehicle air conditioner. However, even in this case, it cannot be avoided that the vehicle air conditioner is heated to a high temperature due to prolonged exposure to the solar radiation, which is not a sufficient measure.

  The present invention has been made in view of such problems, and an object thereof is to provide a vehicle air conditioner that can reduce the heat received by the evaporator from the ceiling of the passenger compartment and reduce the load on the compressor. There is to do.

  In order to solve the above-described problems, a vehicle air conditioner according to the present invention is a vehicle air conditioner (10, 10A) that adjusts the temperature of air and blows it into a passenger compartment (VC), and compresses a refrigerant. A compressor (21), a condenser (22) for exchanging heat between the refrigerant supplied from the compressor and air, an expansion valve (23) for expanding the refrigerant supplied from the condenser, and the expansion valve An evaporator (24) for exchanging heat between the refrigerant supplied from the air and air, a fan (252) for blowing the air that has passed through the evaporator into the vehicle compartment, the compressor, the condenser, the expansion valve, A casing that houses the evaporator and the fan and has a mounting wall (31) that is mounted in the vehicle interior , Comprising a. At least a part of a refrigerant pipe for flowing refrigerant from the evaporator to the compressor is disposed between the evaporator and the mounting wall.

  In the vehicle air conditioner according to the present invention, at least a part of the refrigerant pipe is disposed between the evaporator and the mounting wall of the casing. Therefore, if the mounting wall of the casing is attached to the ceiling of the passenger compartment and the vehicle air conditioner is installed, the heat transfer from the ceiling to the evaporator can be reduced by the refrigerant pipe disposed between them. .

  The refrigerant pipe flows refrigerant from the evaporator to the compressor. In many cases, the refrigerant supplied from the evaporator to the compressor is a mixture of a gas-phase refrigerant and a liquid-phase refrigerant. Among these, when the ratio of the liquid phase refrigerant increases, an excessive load may be applied to the compressor during compression. Therefore, the refrigerant supplied to the compressor is preferably in a gas phase state as much as possible.

  In the vehicle air conditioner according to the present invention, since the refrigerant pipe is disposed between the evaporator and the mounting wall, the refrigerant pipe is configured to receive heat moving from the ceiling more easily than the evaporator. For this reason, it becomes possible to increase the temperature of the refrigerant in the refrigerant pipe to promote vaporization and supply the refrigerant to the compressor in a state where the ratio of the gas-phase refrigerant is increased. In other words, according to the present invention, it is possible to reduce the heat transfer from the ceiling of the passenger compartment to the evaporator and to reduce the load on the compressor by effectively using the configuration used for supplying the refrigerant from the evaporator to the compressor. It becomes.

  ADVANTAGE OF THE INVENTION According to this invention, while reducing the heat which an evaporator receives from the ceiling of a compartment, the vehicle air conditioner which can aim at the load reduction of a compressor can be provided.

It is a mimetic diagram showing the state where the air-conditioner for vehicles concerning a 1st embodiment was attached. It is a schematic diagram which shows the cross section of the vehicle air conditioner of FIG. It is a schematic diagram which shows the casing of the vehicle air conditioner which concerns on 2nd Embodiment. It is sectional drawing which shows the IV-IV cross section of FIG.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In order to facilitate the understanding of the description, the same constituent elements in the drawings will be denoted by the same reference numerals as much as possible, and redundant description will be omitted.

  A vehicle air conditioner 10 (hereinafter also referred to as “air conditioner 10”) according to the first embodiment will be described with reference to FIGS. 1 and 2. FIG. 1 is a schematic view of a vehicle VH to which an air conditioner 10 is attached as viewed from the left. FIG. 2 schematically shows a cross section of the air conditioner 10 in a cross section perpendicular to the left-right direction of the vehicle VH.

  The air conditioner 10 is a device that adjusts the temperature in the passenger compartment VC of the vehicle VH. The air conditioner 10 is attached to the ceiling VL of the passenger compartment VC. As shown in FIG. 1, a front row seat S <b> 1 and a rear row seat S <b> 2 are provided in the passenger compartment VC. The air conditioner 10 is disposed above the heads of the occupants P1, P2 seated on the seats S1, S2, respectively.

  In the present specification, the direction in which the vehicle VH moves forward is referred to as “front”, and the direction in which the vehicle VH moves backward is referred to as “rear”. Further, the left direction when the passengers P1 and P2 face the front direction will be referred to as “left”, and the right direction will be referred to as “right”. Further, the description will be made by referring to the vertically upward direction as “up” and the vertically downward direction as “down”.

  As shown in FIG. 2, the air conditioner 10 includes a refrigeration cycle 20, a casing 30, and an exhaust duct 40.

  The refrigeration cycle 20 is a device that circulates a refrigerant and exchanges heat between the refrigerant and air. The refrigeration cycle 20 includes a compressor 21, a condenser 22, an expansion valve 23, an evaporator 24, a first fan 251, and a second fan 252. In addition, the refrigeration cycle 20 is connected to the compressor 21 or the like to form an annular flow path, and includes a first refrigerant pipe 212, a second refrigerant pipe 223, a third refrigerant pipe 234, and a fourth refrigerant pipe 241. And.

  The compressor 21 is a fluid device that compresses the refrigerant. The compressor 21 is driven by power supply. The power supply to the compressor 21 is controlled by an electronic control device (not shown).

  A first refrigerant pipe 212 and a fourth refrigerant pipe 241 are connected to the compressor 21. When the compressor 21 is driven by receiving power supply, the refrigerant supplied from the fourth refrigerant pipe 241 is compressed and supplied to the capacitor 22 via the first refrigerant pipe 212.

  The condenser 22 is a heat exchanger that exchanges heat between the refrigerant flowing inside and the air passing through the outer surface. The capacitor 22 has a plurality of tubes and fins (not shown). Each tube is a metallic tubular member in which a flow path for flowing a refrigerant is formed. Each fin is a so-called corrugated fin, and is formed by bending a thin metal plate. The plurality of tubes and fins are provided to be alternately stacked.

  The capacitor 22 is connected to the first refrigerant pipe 212 and the second refrigerant pipe 223. The refrigerant that has passed through the flow path in the capacitor 22 is supplied to the expansion valve 23 via the second refrigerant pipe 223.

  The expansion valve 23 is a device that expands the supplied refrigerant. The temperature of the refrigerant supplied to the expansion valve 23 decreases with expansion.

  The expansion valve 23 is connected to the second refrigerant pipe 223 and the third refrigerant pipe 234. The refrigerant that has expanded at the expansion valve 23 and has a lowered temperature is supplied to the evaporator 24 via the third refrigerant pipe 234.

  The evaporator 24 is a heat exchanger that exchanges heat between the refrigerant flowing inside and the air passing through the outer surface. The evaporator 24 has a plurality of tubes and fins (not shown). Each tube is a metallic tubular member in which a flow path for flowing a refrigerant is formed. Each fin is a so-called corrugated fin, and is formed by bending a thin metal plate. The plurality of tubes and fins are provided to be alternately stacked.

  The evaporator 24 is connected to the third refrigerant pipe 234 and the fourth refrigerant pipe 241. The refrigerant that has passed through the flow path in the evaporator 24 is supplied to the compressor 21 via the fourth refrigerant pipe 241.

  Each of the first fan 251 and the second fan 252 is a blower that is driven by power supply. The power supply to the first fan 251 and the second fan 252 is controlled by an electronic control device (not shown). When the first fan 251 and the second fan 252 are driven, air is sucked and blown out, respectively.

  The casing 30 is a housing that forms the outer shell of the air conditioner 10. The casing 30 has a mounting wall 31 and a front wall 33. The mounting wall 31 and the front wall 33 are arranged to face each other with a predetermined interval. The front wall 33 is formed such that the first grill 331 and the second grill 332 are separated from each other. Each of the first grill 331 and the second grill 332 is an assembly of a plurality of holes penetrating in the thickness direction of the front wall 33.

  The casing 30 has a side wall 32 that connects the side portions of the mounting wall 31 and the front wall 33. In the casing 30, a housing space 35 is defined by an attachment wall 31, a side wall 32, and a front wall 33.

  In addition, an intake port 321 and an exhaust port 322 that are openings are formed in the side wall 32 of the casing 30. The intake port 321 and the exhaust port 322 communicate with the inside and outside of the accommodation space 35. The plurality of holes of the first grill 331 and the second grill 332 described above also communicate with the inside and outside of the accommodation space 35.

  The refrigeration cycle 20 described above is disposed in the accommodation space 35 of the casing 30. The compressor 21 is disposed at a position near the front wall 33 and between the first grill 331 and the second grill 332. The first refrigerant pipe 212 connected to the compressor 21 is disposed so as to extend from the compressor 21 toward the first grill 331 along the front wall 33.

  The capacitor 22 is disposed at a position near the front wall 33 and corresponding to the first grill 331. A first fan 251 is disposed between the capacitor 22 and the first grill 331. The second refrigerant pipe 223 connected to the capacitor 22 is disposed at a position closer to the mounting wall 31 than the capacitor 22 so as to extend toward the second grill 332 side.

  The expansion valve 23 is disposed at a position closer to the mounting wall 31 than the compressor 21 and the condenser 22. The third refrigerant pipe 234 connected to the expansion valve 23 is disposed so as to extend from the expansion valve 23 toward the second grill 332 side.

  The evaporator 24 is disposed at a position near the front wall 33 and facing the second grill 332. A second fan 252 is disposed between the evaporator 24 and the second grill 332. Further, the evaporator 24 is arranged so as to sandwich the compressor 21 between the condenser 22 and the evaporator 22.

  In addition, the evaporator 24 is connected to the third refrigerant pipe 234 at the rear end that is the end near the compressor 21. Further, the evaporator 24 is connected to the fourth refrigerant pipe 241 at a front end portion which is an end portion farther from the compressor 21. The fourth refrigerant pipe 241 extends toward the compressor 21 at a position closer to the attachment wall 31 than the evaporator 24, and a part of the fourth refrigerant pipe 241 is disposed between the evaporator 24 and the attachment wall 31.

  An exhaust duct 40 is connected to the side wall 32 of the casing 30. The exhaust duct 40 is a tubular member having a flow path inside. One end of the exhaust duct 40 is connected to the side wall 32 so that the flow path communicates with the exhaust port 322. The other end of the exhaust duct 40 (not shown) extends outside the vehicle compartment VC.

  The air conditioner 10 configured as described above is installed in the passenger compartment VC by attaching the mounting wall 31 to the ceiling VL. At this time, the air conditioner 10 may be attached by bringing the attachment wall 31 and the ceiling VL into contact with each other, or the attachment wall 31 may be attached to the ceiling VL via a jig (not shown). In any case, the air conditioner 10 is installed by being fixed to the ceiling VL at the mounting wall 31 of the casing 30.

  When the air conditioner 10 is attached to the ceiling VL, the first grill 331 and the second grill 332 of the casing 30 are arranged so as to face downward. In addition, the casing 30 is arranged so that the intake port 321 faces the front direction and the exhaust port 322 faces the rear direction. The exhaust duct 40 is disposed so as to extend rearward from the exhaust port 322.

  Next, the operation during the cooling operation of the air conditioner 10 will be described with reference to FIG. The electronic control device described above supplies power to the compressor 21, the first fan 251, and the second fan 252 to drive each device.

  As the compressor 21 is driven, the refrigerant supplied from the fourth refrigerant pipe 241 to the compressor 21 is compressed and becomes a high-temperature and high-pressure gas-phase refrigerant. The refrigerant is supplied to the capacitor 22 via the first refrigerant pipe 212 and flows into the flow path in each tube of the capacitor 22.

  The first fan 251 sucks air from the passenger compartment VC through the first grill 331 as indicated by the arrow F1. The air passes between adjacent tubes of the condenser 22. The refrigerant flowing in each tube of the condenser 22 is cooled by exchanging heat with the air, the temperature is lowered, and a liquid phase is obtained.

  Further, the air passing through the condenser 22 also performs heat exchange on the surface of the fin disposed between the adjacent tubes. That is, the fin functions to increase the area where heat exchange between the refrigerant flowing in the tube and the air is performed, and to promote the heat exchange. As indicated by the arrow F1, the air that has passed through the capacitor 22 is discharged out of the passenger compartment VC via the exhaust port 322 and the exhaust duct 40.

  Next, the refrigerant discharged from the capacitor 22 is supplied to the expansion valve 23 via the second refrigerant pipe 223. When the refrigerant passes through the expansion valve 23, its volume expands, and the temperature further decreases accordingly.

  The refrigerant that has passed through the expansion valve 23 is supplied to the evaporator 24 via the third refrigerant pipe 234. Between the adjacent tubes of the evaporator 24, as indicated by an arrow F2, air that the second fan 252 sucks from the interior of the vehicle compartment VC via the air inlet 321 passes. For this reason, the liquid refrigerant flowing in each tube of the evaporator 24 exchanges heat with the air. The air also performs heat exchange on the surfaces of the fins arranged between adjacent tubes. That is, the fin functions to increase the area where heat exchange between the refrigerant flowing in the tube and the air is performed, and to promote the heat exchange.

  The air passing through the evaporator 24 is deprived of heat by the liquid-phase refrigerant in the evaporator 24 and the temperature is lowered. Further, the air is dehumidified by removing the contained water as condensed water in the evaporator 24. The temperature is lowered by passing through the evaporator 24, and the dehumidified air is supplied from the second grill 332 into the vehicle interior VC as indicated by an arrow F2.

  On the other hand, the temperature of the refrigerant that has exchanged heat with air in the evaporator 24 rises. When this refrigerant is discharged from the evaporator 24, it is supplied again to the compressor 21 through the fourth refrigerant pipe 241.

  Here, the ceiling VL of the passenger compartment VC may be exposed to strong solar radiation in summer or the like and become hot. If heat is transferred from the ceiling VL to the evaporator 24 of the air conditioner 10, the evaporator 24 may not be able to properly cool the air.

  However, in the air conditioner 10, at least a part of the fourth refrigerant pipe 241 is disposed between the evaporator 24 and the mounting wall 31 of the casing 30. Therefore, if the mounting wall 31 of the casing 30 is attached to the ceiling VL of the passenger compartment VC and the air conditioner 10 is installed, the heat transfer from the ceiling VL to the evaporator 24 is performed, and the fourth refrigerant pipe 241 disposed between them. Can be reduced.

  The fourth refrigerant pipe 241 is a pipe through which the refrigerant flows from the evaporator 24 to the compressor 21. In many cases, the refrigerant supplied from the evaporator 24 to the compressor 21 is a mixture of a gas-phase refrigerant and a liquid-phase refrigerant. Among these, when the ratio of the liquid phase refrigerant increases, an excessive load may be applied to the compressor 21 during compression. Therefore, the refrigerant supplied to the compressor 21 is preferably in a gas phase state as much as possible.

  In the air conditioner 10, the fourth refrigerant pipe 241 is disposed between the evaporator 24 and the mounting wall 31, and therefore the fourth refrigerant pipe 241 is more susceptible to heat moving from the ceiling VL than the evaporator 24. It has become. For this reason, it becomes possible to increase the temperature of the refrigerant in the fourth refrigerant pipe 241 to promote vaporization and supply the refrigerant to the compressor 21 in a state where the ratio of the gas-phase refrigerant is increased. That is, according to the air conditioner 10, the configuration used for supplying the refrigerant from the evaporator 24 to the compressor 21 is effectively used to reduce heat transfer from the ceiling VL to the evaporator 24 and to reduce the load on the compressor 21. It becomes possible.

  In addition, the evaporator 24 and the compressor 21 are arranged so as not to overlap each other when viewed from the mounting wall 31. Thus, a space for arranging the fourth refrigerant pipe 241 between the evaporator 24 and the mounting wall 31 is ensured, and the compressor 21 that becomes high temperature as the refrigerant is compressed is arranged far from the evaporator 24, so that the compressor 21 It is possible to suppress the heat transfer from to the evaporator 24.

  Further, the fourth refrigerant pipe 241 is connected to a front end portion on the far side from the compressor 21 among the end portions of the evaporator 24. Thereby, the pipe length of the fourth refrigerant pipe 241 can be increased, and the heat transfer from the ceiling VL to the evaporator 24 can be reliably reduced by the fourth refrigerant pipe 241.

  Further, the evaporator 24 is arranged so as to sandwich the compressor 21 between the condenser 22 and the evaporator 22. Accordingly, a space for arranging the fourth refrigerant pipe 241 between the evaporator 24 and the mounting wall 31 is secured, and the capacitor 22 through which the high-temperature refrigerant flows is arranged far from the evaporator 24, and the capacitor 22 is transferred from the evaporator 24 to the evaporator 24. It is possible to suppress the heat transfer.

  Next, referring to FIGS. 3 and 4, a vehicle air conditioner 10 </ b> A according to the second embodiment (hereinafter also referred to as “air conditioner 10 </ b> A”). This air conditioner 10A is an apparatus that is attached to the ceiling VL of the passenger compartment VC and adjusts the temperature in the passenger compartment VC, similarly to the air conditioner 10 according to the first embodiment. The shape of the casing 30A of the air conditioner 10A is different from the casing 30 according to the first embodiment. In the air conditioner 10A, the same components as those of the air conditioner 10 are denoted by the same reference numerals, and description and illustration are omitted as appropriate.

  3 and 4 show only a part of the casing 30A in the air conditioner 10A. The air conditioner 10A is arranged such that a fourth refrigerant pipe 241A for flowing the refrigerant from the evaporator 24 to the compressor 21 is in contact with the mounting wall 31A of the casing 30A. Specifically, the fourth refrigerant pipe 241 </ b> A is disposed inside the mounting wall 31.

  The configuration of the casing 30A will be described in detail. As shown in FIG. 4, the mounting wall 31A of the casing 30A is formed by a pair of outer shell bodies 31A1 and 31A2. The outer shell body 31A2 defines the above-described accommodation space 35 therein. The outer shell body 31A1 is provided so as to cover the outer surface of the outer shell body 31A2. The outer shells 31A1 and 31A2 are bonded together by an adhesive 34 and integrated.

  Further, the outer shell 31A1 is formed with a protruding portion 36 that protrudes upward so that the cross section has a semicircular arc shape. As shown in FIG. 3, the protruding portion 36 is formed so as to exhibit a substantially S-shape when viewed from above. Further, as shown in FIG. 4, a protrusion 37 is formed at a position corresponding to the protrusion 36 in the outer shell 31A2. The protruding portion 37 protrudes downward so that the cross section has a semicircular arc shape.

  As the outer shell body 31A1 and the outer shell body 31A2 are integrated, the flow path 26 through which the refrigerant flows is formed between the protruding portion 36 and the protruding portion 37. In other words, the fourth refrigerant pipe 241A is a tubular portion constituted by the protruding portion 36 and the protruding portion 37, and is arranged to meander within the mounting wall 31 as shown in FIG. .

  A tube 27 is connected to one end of the fourth refrigerant pipe 241A, and a tube 28 is connected to the other end. Each of the tubes 27 and 28 is a flexible tubular member, and a flow path is formed therein. Both the tubes 27 and 28 are connected so that the flow path inside thereof communicates with the flow path 26 in the fourth refrigerant pipe 241A.

  The tube 27 is connected to the evaporator 24, and the tube 28 is connected to the compressor 21. Thereby, the refrigerant discharged from the evaporator 24 first flows into the flow path 26 from one end of the fourth refrigerant pipe 241 via the tube 27. The refrigerant flows while meandering through the flow path 26. The refrigerant that has flowed to the other end of the fourth refrigerant pipe 241 is discharged from there to the tube 28 and supplied to the compressor 21.

  As described above, in the air conditioner 10A according to the second embodiment, the fourth refrigerant pipe 241A is disposed so as to be in contact with the attachment wall 31A. Thereby, if the mounting wall 31A of the casing 30A is attached to the ceiling VL of the passenger compartment VC and the air conditioner 10A is installed, the fourth refrigerant pipe 241A has a configuration more easily receiving heat moving from the ceiling VL. As a result, the heat transfer from the ceiling VL to the evaporator 24 can be reliably reduced. Further, it is possible to supply the refrigerant to the compressor 21 in a state where the temperature of the refrigerant is increased in the fourth refrigerant pipe 241A to promote vaporization and the ratio of the gas-phase refrigerant is further increased.

  The fourth refrigerant pipe 241A is disposed inside the mounting wall 31A. Thereby, the heat transferred from the ceiling VL is further received by the refrigerant flowing through the fourth refrigerant pipe 241A, and the heat transfer from the ceiling VL to the evaporator 24 can be reliably reduced.

  The fourth refrigerant pipe 241A is arranged to meander inside the mounting wall 31A. As a result, heat transferred from the ceiling VL can be further received by the refrigerant flowing through the fourth refrigerant pipe 241A in a wide range within the mounting wall 31A, and heat transfer from the ceiling VL to the evaporator 24 can be reliably reduced. Become.

  The embodiments of the present invention have been described above with reference to specific examples. However, the present invention is not limited to these specific examples. In other words, those specific examples that have been appropriately modified by those skilled in the art are also included in the scope of the present invention as long as they have the characteristics of the present invention. Each element included in each of the specific examples described above and their arrangement, material, condition, shape, size, and the like are not limited to those illustrated, and can be appropriately changed.

  In the above embodiment, the operation of the air conditioner 10 during the cooling operation is described. However, the vehicle air conditioner according to the present invention is not limited to one that performs only the cooling operation. For example, in the air conditioner 10, the heating operation for increasing the temperature in the passenger compartment VC may be performed by changing the direction in which the first fan 251 or the second fan 252 sucks or blows air. Specifically, air that has risen in temperature through the condenser 22 may be returned into the passenger compartment VC, and air that has been reduced in temperature through the evaporator 24 may be discharged out of the passenger compartment VC.

10, 10A: Vehicle air conditioner 21: Compressor 22: Condenser 23: Expansion valve 24: Evaporator 241, 241A: Fourth refrigerant pipe (refrigerant pipe)
252: Second fan (fan)
30, 30A: Casing 31, 31A: Mounting wall VC: Vehicle compartment VL: Ceiling

Claims (7)

A vehicle air conditioner (10, 10A) that adjusts the temperature of air and blows it into a passenger compartment (VC)
A compressor (21) for compressing the refrigerant;
A condenser (22) for exchanging heat between the refrigerant supplied from the compressor and air;
An expansion valve (23) for expanding the refrigerant supplied from the capacitor;
An evaporator (24) for exchanging heat between the refrigerant supplied from the expansion valve and the air;
A fan (252) for blowing the air that has passed through the evaporator into the passenger compartment;
A casing having a mounting wall (31) for housing the compressor, the condenser, the expansion valve, the evaporator, and the fan, and being mounted in a vehicle interior;
An air conditioner for a vehicle, wherein at least a part of a refrigerant pipe for flowing a refrigerant from the evaporator to the compressor is disposed between the evaporator and the mounting wall.   2. The vehicle air conditioner according to claim 1, wherein the evaporator and the compressor are arranged so as not to overlap each other when viewed from the mounting wall.   The said refrigerant | coolant piping is a vehicle air conditioner of Claim 2 connected to the edge part far from the said compressor among the edge parts of the said evaporator.   The vehicle air conditioner according to claim 3, wherein the evaporator is disposed so as to sandwich the compressor between the evaporator and the condenser.   The vehicle air conditioner according to claim 1 or 4, wherein the refrigerant pipe is disposed so as to be in contact with the mounting wall.   The vehicular air conditioner according to claim 5, wherein the refrigerant pipe is disposed inside the mounting wall.   The vehicle air conditioner according to claim 6, wherein the refrigerant pipe is disposed so as to meander inside the mounting wall.

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