JP2012091660A - Vehicle air conditioning system - Google Patents

Abstract

A vehicular air conditioning system capable of exchanging a heat exchange unit without draining a refrigerant in a refrigerant pipe.
An air conditioning unit attached to a vehicle body forms an air passage and blows air from a blower fan to blow out air into a vehicle interior. In addition, since the evaporator 40 and a part of the refrigerant pipe 32 are disposed in the air flow path 22 of the air conditioning unit 10A, the air in the air flow path 22 is heat-exchanged with the refrigerant by the evaporator 40. Then, the heat-exchanged air is blown out into the vehicle interior 18. Here, since the heat exchange unit 10B is separate from the air conditioning unit 10A and is detachable from the vehicle body 12, when the heat exchange unit 10B is removed from the air conditioning unit 10A, the refrigerant pipe Therefore, it is not necessary to divide the refrigerant in the refrigerant pipe 32.
[Selection] Figure 1

Description

  The present invention relates to a vehicle air conditioning system having heat exchange and air blowing functions.

  In some vehicle air conditioning systems, a part of the heat exchange unit (heat exchanger and refrigerant pipe) is housed in an air conditioning unit on the vehicle interior side (see, for example, Patent Document 1). In such a vehicle air conditioning system, the refrigerant pipe passes through both the vehicle interior and the vehicle interior.

JP-A-8-268035

  However, in this structure, when the heat exchange unit is replaced, it is necessary to remove the refrigerant in the refrigerant pipe each time.

  In view of the above fact, an object of the present invention is to obtain a vehicle air conditioning system that can replace a heat exchange unit without removing a refrigerant in a refrigerant pipe.

  An air conditioning system for a vehicle according to a first aspect of the present invention is attached to a vehicle body, forms an air flow path, blows air into a vehicle interior, and is separated from the air conditioning unit. A heat exchanger and a refrigerant pipe connected to the heat exchanger are provided, and are detachable from the vehicle body. When attached to the vehicle body, the heat exchanger and a part of the refrigerant pipe are air of the air conditioning unit. And a heat exchange unit disposed in the flow path.

  According to the vehicle air conditioning system of the present invention described in claim 1, the air conditioning unit attached to the vehicle body forms an air flow path and blows air into the vehicle interior. Since the heat exchanger and a part of the refrigerant pipe are arranged in the air flow path of the air conditioning unit, the air in the air flow path is heat-exchanged with the refrigerant by the heat exchanger. Then, the heat-exchanged air is blown out into the passenger compartment.

  Here, since the heat exchange unit is separated from the air conditioning unit and can be attached to and detached from the vehicle body, when the heat exchange unit is removed from the air conditioning unit, the refrigerant piping need not be divided. There is no need to remove the refrigerant from the refrigerant piping.

  The vehicle air conditioning system according to a second aspect of the present invention is the configuration according to the first aspect, wherein the heat exchange unit can be disposed in an air flow path of the air conditioning unit, and the heat exchanger and the refrigerant pipe. In which the portion on the heat exchanger side is housed, and the box is placed in the air flow path of the air conditioning unit, and the box has air in a portion on the upstream side of the air flow path at the arrangement position. An introduction port is formed, an air discharge port is formed at a site on the downstream side of the air flow path at the arrangement position, and a periphery of a site through which the refrigerant pipe is attached is sealed.

  According to the vehicle air conditioning system of the present invention described in claim 2, the heat exchanger side portions of the heat exchanger and the refrigerant pipe are accommodated in the box of the heat exchange unit, and the box is the air flow of the air conditioning unit. It can be placed on the road. When the box is placed in the air flow path of the air conditioning unit, the air on the upstream side of the air flow path enters the box through the air inlet of the box and then exits the box through the air outlet of the box. Circulates downstream of the air flow path. In addition, since the periphery of the portion of the box through which the refrigerant pipe is attached is sealed, the air that has entered the box from the air introduction port flows to the downstream side of the air flow path without leaking from the box.

  In this way, by disposing a box separate from the air conditioning unit in the air flow path of the air conditioning unit, a part of the heat exchanger and the refrigerant pipe can be disposed in the air flow path of the air conditioning unit. Moreover, since the box separate from the air conditioning unit can be removed from the air flow path of the air conditioning unit, the workability of exchanging the heat exchange unit is good.

  A vehicle air conditioning system according to a third aspect of the present invention is the air conditioning system for a vehicle according to the second aspect, wherein the air conditioning unit is disposed on the vehicle interior side with respect to a partition partitioning the outside of the vehicle interior, and the box is The partition can be disposed in the air flow path of the air conditioning unit from the outside of the passenger compartment through the opening formed in the partition, and can be attached to and detached from the periphery of the opening in the partition. A detachable part is provided.

  According to the vehicle air conditioning system of the present invention described in claim 3, the air conditioning unit is arranged on the vehicle interior side with respect to the partition wall that partitions the exterior and interior of the vehicle interior, and the box is located on the partition wall from the exterior of the vehicle interior to the partition wall. It can be arranged in the air flow path of the air conditioning unit through the opening formed in the air conditioning unit. Moreover, the attachment / detachment part of the box is attached / detached with respect to the peripheral part of the opening part in a partition. For this reason, the air conditioning unit is attached / detached from the vehicle interior side, the heat exchange unit is attached / detached from the vehicle interior side, and each attachment / detachment can be performed independently. For this reason, the assembly | attachment property and exchange workability | operativity of a heat exchange unit improve.

  As described above, according to the vehicle air conditioning system of the first aspect of the present invention, there is an excellent effect that the heat exchange unit can be replaced without removing the refrigerant in the refrigerant pipe.

  According to the vehicle air conditioning system of the second aspect, there is an excellent effect that the assembling property and the exchange workability of the heat exchange unit can be improved.

  According to the vehicle air conditioning system of the third aspect, there is an excellent effect that the assembling property and the exchange workability of the heat exchange unit can be further improved.

It is a longitudinal section showing a part of a vehicle air-conditioning system concerning one embodiment of the present invention. It is a disassembled perspective view which shows a part of vehicle air conditioning system which concerns on one Embodiment of this invention. It is a perspective view which shows the heat exchanger box of the vehicle air conditioning system which concerns on one Embodiment of this invention. It is a lineblock diagram showing the whole air-conditioning system composition for vehicles concerning one embodiment of the present invention. It is a lineblock diagram showing the whole composition at the time of exchanging the heat exchange unit of the air-conditioning system for vehicles concerning one embodiment of the present invention with other heat exchange units.

(Configuration of the embodiment)
A vehicle air conditioning system according to an embodiment of the present invention will be described with reference to FIGS. In these drawings, an arrow FR appropriately shown indicates the vehicle front side, and an arrow UP indicates the vehicle upper side. Moreover, the vehicle air conditioning system according to the present embodiment can be applied to an engine vehicle or the like in addition to an electric vehicle (EV) or a hybrid vehicle (an automobile including an electric motor and an engine).

  FIG. 4 shows the overall configuration of a vehicle air conditioning system 10 according to an embodiment of the present invention. As shown in FIG. 4, the vehicle air conditioning system 10 includes an air conditioning unit 10A and a heat exchange unit 10B.

  The heat exchange unit 10B is separate from the air conditioning unit 10A, and a refrigeration cycle 30 is formed. In the refrigeration cycle 30, a refrigerant (not shown) is contained in the refrigerant pipe 32 and circulated. A compressor (compressor) 34, a condenser (condenser) 36, a receiver dryer 44, an expansion valve (expansion valve) 38, an evaporator (heat radiator) 40 as a heat exchanger, and the like are connected to the refrigerant pipe 32. In the refrigeration cycle 30, in the process in which the refrigerant circulates in the cycle, the state change of the refrigerant is continuously repeated as compression, solidification, expansion, and evaporation, thereby absorbing the heat in the vehicle interior and releasing the heat outside the vehicle interior. Or cooling. Hereinafter, the compressor 34, the condenser 36, the receiver dryer 44, the expansion valve 38, the evaporator 40, and the like connected to the refrigerant pipe 32 will be briefly described.

  The compressor 34 is driven by the rotational power of a motor (or engine) (not shown) being transmitted through a crank pulley and a V-belt, and the refrigerant is converted into a high-temperature and high-pressure gas by suction and sent to the condenser 36. The condenser 36 is attached to the front surface of a radiator (not shown) or the like, and cools the high-temperature and high-pressure refrigerant with the cooling fan 42 or wind (air outside the vehicle) obtained by running the vehicle to make a high-pressure liquid. A receiver dryer 44 having a temporary storage tank is provided on the downstream side of the capacitor 36 in the cycle. The receiver dryer 44 removes moisture and dust contained in the refrigerant so that the refrigerant can be supplied smoothly, and only the liquid refrigerant flows through the expansion valve 38 on the downstream side of the cycle.

  The expansion valve 38 expands the refrigerant abruptly and sends it to the evaporator 40 as a low-temperature / low-pressure liquid (mist). The evaporator 40 performs heat exchange between the sent refrigerant and the air passing outside to take heat from the air (cools), and sends the refrigerant to the compressor 34 as a low-temperature and low-pressure gas.

  On the other hand, the air conditioning unit 10A adjacent to the evaporator 40 constitutes an HVAC main body. In FIG. 1, a part of a vehicle air conditioning system 10 including an air conditioning unit 10 </ b> A is shown in a longitudinal sectional view. The air conditioning unit 10 </ b> A includes an air conditioning case (air conditioning duct) 20 disposed on the inner side (vehicle front side) of an instrument panel (not shown). The air conditioning case 20 of the air conditioning unit 10A is disposed on the side of the vehicle interior 18 with respect to the dash panel 14 as a partition wall that partitions the outside of the vehicle interior, and is attached to the dash panel 14 by fasteners (bolts and nuts) not shown. . The dash panel 14 constitutes a part of the vehicle body 12, and a part of a portion facing the air conditioning case 20 is penetrated to form a substantially rectangular opening 14A shown in FIG. A bolt insertion hole 14B is formed in the vicinity of the corner 14A. Further, as shown in FIG. 1, a cowl 16 is joined to the upper end of the dash panel 14, and the cowl 16 is formed with an outside air intake port 16A for introducing outside air into the air conditioning unit 10A. ing.

  In the air conditioning case 20 of the air conditioning unit 10A, an air flow path 22 communicating with the outside of the vehicle interior is formed. In FIG. 1, the air flow direction in the air flow path 22 is indicated by arrows A1 and A2. An outside air introduction port 20A for introducing outside air is formed in the upper part of the air conditioning case 20, and one end of an outside air introduction duct 15 is connected to the outside air introduction port 20A. The other end of the outside air introduction duct 15 is connected to the outside air intake port 16 </ b> A of the cowl 16. Thus, the air flow path 22 communicates with the outside 28 of the passenger compartment. Although not shown, the air conditioning case 20 has an inside air introduction port for introducing the inside air adjacent to the outside air introduction port 20A. The outside air introduction port 20A and the inside air introduction port are not shown. The opening and closing can be switched by. Further, the air conditioning case 20 is formed with a plurality of air outlets (not shown), and these air outlets communicate with an air outlet (not shown) through a duct (not shown). The air outlet is opened toward the vehicle interior 18.

  The air conditioning case 20 is formed with a recess 24 that is recessed toward the opposite side of the dash panel 14 at a portion corresponding to the opening 14A of the dash panel 14 (see FIG. 2). The recess 24 is provided at a portion from the center in the up-down direction to the lower portion of the air conditioning case 20, and functions as a housing and functions as a partition that forms the air flow path 22. A first opening 124A is formed through the upper wall portion 24A of the recess 24, and a second opening 124B is formed through the lower portion of the vertical wall portion 24B on the concave bottom side of the recess 24. A portion between the first opening 124A and the second opening 124B is also a part of the air flow path 22.

  In the air conditioning case 20, a blower fan 26 for blowing air is provided above the upper wall portion 24 </ b> A of the recess 24. The blower fan 26 is configured to suck air from the outside air introduction port 20A or the inside air introduction port (not shown) into the air conditioning case 20 by operating the blower motor, and further send this air toward the evaporator 40. . That is, the air conditioning unit 10 </ b> A blows and blows air into the vehicle interior 18.

  A heat exchanger box 46 constituting a part of the heat exchange unit 10B can be arranged in the concave inner space of the concave portion 24 of the air conditioning case 20, in other words, in the air flow path 22 of the air conditioning unit 10A. 2 and 3, the heat exchanger box 46 has an opening side of the box body 46A abutted against a flat lid body 46B, and an opening side flange 346A of the box body 46A is connected to a fastener (bolt). 46C and nut 46D) are attached to the lid 46B. In addition, about the structure which couple | bonds the box 46A and the cover body 46B, other structures, such as a nail fitting, may be sufficient besides bolt fastening. Further, the heat exchanger box 46 is an attachment / detachment portion 48 in which the outer peripheral portion of the lid 46 </ b> B is provided for attachment / detachment to the dash panel 14. The detachable portion 48 is provided on the outer peripheral side of a portion that forms the internal space of the heat exchanger box 46, and constitutes the outer peripheral edge portion of the heat exchanger box 46. Bolt insertion holes 48 </ b> A are formed through the four corners of the attaching / detaching portion 48.

  As shown in FIG. 1, a portion on the evaporator 40 side in the evaporator 40 and the refrigerant pipe 32 is accommodated in the heat exchanger box 46. The refrigerant pipe 32 is attached to the lid 46B by being inserted into an attachment hole (not shown) formed in the lid 46B of the heat exchanger box 46 via an elastic seal member 50. As a result, the periphery of the portion of the heat exchanger box 46 where the refrigerant pipe 32 is attached is sealed by the seal member 50 (see FIG. 2).

  As shown in FIG. 3, in the box body 46A of the heat exchanger box 46, a part of the upper wall portion 146A on the upper side in the installed state penetrates to form an air inlet 52, and the lid body 46B. An air discharge port 54 is formed through a lower portion of the vertical wall portion 246 </ b> A that is opposed to the upper wall 246 </ b> A. As shown in FIG. 1, the air inlet 52 of the heat exchanger box 46 is connected to the air flow path 22 at the arrangement position in a state where the heat exchanger box 46 is arranged in the air flow path 22 of the air conditioning unit 10 </ b> A. It is formed at a site on the upstream side. On the other hand, the air discharge port 54 of the heat exchanger box 46 is connected to the downstream side of the air flow path 22 at the arrangement position in a state where the heat exchanger box 46 is arranged in the air flow path 22 of the air conditioning unit 10A. It is formed in the site.

  As shown in FIGS. 1 and 2, the heat exchanger box 46 can be disposed in the air flow path 22 of the air conditioning unit 10 </ b> A through the opening 14 </ b> A from the outside 28 of the vehicle compartment with respect to the dash panel 14. At the same time, the detachable portion 48 is attached to the peripheral portion of the opening 14A in the dash panel 14 by fasteners (bolts 56A and nuts 56B (see FIG. 1) passing through the bolt insertion holes 48A and 14B (see FIG. 2)). . That is, the detachable part 48 is detachable with respect to the peripheral part of the opening 14A. When the detachable part 48 is attached to the dash panel 14, the detachable part 48 is connected to the opening 14A of the dash panel 14 and the heat exchanger box. The gap with 46 is sealed. As described above, in the heat exchange unit 10B, the heat exchanger box 46 can be attached to and detached from the dash panel 14 of the vehicle body 12, and the heat exchanger box 46 is attached to the dash panel 14 as shown in FIG. Then, the evaporator 40 and a part of the refrigerant pipe 32 are arranged in the air flow path 22 of the air conditioning unit 10A.

  In addition, although illustration is abbreviate | omitted, as for the heat exchange unit 10B, components other than the heat exchanger box 46 are attached to the vehicle body 12 with the fastener (bolt and nut), and can be attached or detached with respect to the vehicle body 12. .

  Next, the vehicle air conditioning system 60 when the heat exchange unit 10B in the vehicle air conditioning system 10 is replaced with the heat exchange unit 60A shown in FIG. 5 will be outlined. Note that components that are substantially the same as those of the vehicle air conditioning system 10 (see FIG. 4) are assigned the same reference numerals, and descriptions thereof are omitted. As shown in FIG. 5, a refrigeration cycle 62 is formed in the heat exchange unit 60A. The refrigeration cycle 62 encloses a refrigerant (not shown) in the refrigerant pipe 32 and circulates in the cycle including the components of the Peltier unit 64, the first radiator 66, and the second radiator 68 as a heat exchanger. Let The Peltier unit 64 is for cooling in which a plurality of Peltier elements are connected, and is connected to the first radiator 66 and the second radiator 68 through the refrigerant pipe 32.

  In the heat exchange unit 60A, the second radiator 68 and the portion of the refrigerant pipe 32 on the second radiator 68 side are accommodated in the heat exchanger box 46 (see FIG. 1). For this reason, the heat exchange unit 60A is configured such that the heat exchanger box 46 (see FIG. 1) can be attached to and detached from the dash panel 14 (see FIG. 1) and is attached to the vehicle body 12 (see FIG. 1). The two radiators 68 and a part of the refrigerant pipe 32 are arranged in the air flow path 22 of the air conditioning unit 10A.

  In addition, although illustration is abbreviate | omitted, as for the heat exchange unit 60A, components other than the heat exchanger box 46 (refer FIG. 1) are also attached to the vehicle body 12 (refer FIG. 1) with the fastener (bolt and nut), It can be attached to and detached from the vehicle body 12.

(Operation and effect of the embodiment)
Next, the operation and effect of the above embodiment will be described.

  As shown in FIG. 1, the air conditioning unit 10 </ b> A attached to the vehicle body 12 forms an air flow path 22 and blows air from the blower fan 26 to blow out air into the vehicle interior 18. In addition, since the evaporator 40 and a part of the refrigerant pipe 32 are disposed in the air flow path 22 of the air conditioning unit 10A, the air in the air flow path 22 is heat-exchanged with the refrigerant by the evaporator 40. Then, the heat-exchanged air is blown out into the vehicle interior 18.

  Here, since the heat exchange unit 10B is separate from the air conditioning unit 10A and is detachable from the vehicle body 12, when the heat exchange unit 10B is removed from the air conditioning unit 10A, the refrigerant pipe Therefore, it is not necessary to divide the refrigerant in the refrigerant pipe 32.

  In the present embodiment, the evaporator 40 and a part of the refrigerant pipe 32 are accommodated in the heat exchanger box 46 of the heat exchange unit 10B, and the heat exchanger box 46 is located in the air flow path 22 of the air conditioning unit 10A. It can be placed in. In a state in which the heat exchanger box 46 is disposed in the air flow path 22 of the air conditioning unit 10 </ b> A, the air on the upstream side of the air flow path 22 flows into the heat exchanger box 46 from the air inlet 52 of the heat exchanger box 46. After entering (see the direction of arrow A1), the air flows out of the heat exchanger box 46 from the air outlet 54 of the heat exchanger box 46 (see the direction of arrow A2) and flows downstream of the air flow path 22. In addition, since the periphery of the portion of the heat exchanger box 46 through which the refrigerant pipe 32 is attached is sealed by the sealing member 50, the air that has entered the heat exchanger box 46 from the air inlet 52 is transferred to the heat exchanger. It flows to the downstream side of the air flow path 22 without leaking from the box 46.

  Thus, by disposing the heat exchanger box 46 separate from the air conditioning unit 10A in the air flow path 22 of the air conditioning unit 10A, the evaporator 40 and a part of the refrigerant pipe 32 are connected to the air flow of the air conditioning unit 10A. It can be placed in the path 22. Further, since the heat exchanger box 46 separate from the air conditioning unit 10A can be removed from the air flow path 22 of the air conditioning unit 10A, the workability of the heat exchange unit 10B is good.

  In the present embodiment, the air conditioning unit 10A is disposed on the vehicle interior 18 side with respect to the dash panel 14 that partitions the exterior of the vehicle interior, and the heat exchanger box 46 is dashed from the vehicle exterior 28 side with respect to the dash panel 14. It can be arranged in the air flow path 22 of the air conditioning unit 10 </ b> A through the opening 14 </ b> A formed in the panel 14. Further, the attaching / detaching portion 48 of the heat exchanger box 46 is attached to and detached from the peripheral portion of the opening 14 </ b> A in the dash panel 14. Therefore, the air conditioning unit 10A is attached / detached from the vehicle interior 18 side, the heat exchange unit 10B is attached / detached from the vehicle interior outside 28 side, and each attachment / detachment can be performed independently. For this reason, the assembling property and the exchange workability of the heat exchange unit 10B are improved.

  As described above, according to the vehicle air-conditioning system 10 according to the present embodiment, the heat exchange unit 10B can be replaced without removing the refrigerant in the refrigerant pipe 32.

  In the present embodiment, the heat exchange units 10B and 60A (see FIG. 5) may be mounted on the vehicle after the refrigerant is injected into the refrigerant pipe 32 in a state where the air conditioning unit 10A is disposed in the vehicle interior 18. Since it becomes possible (in other words, it is not necessary to inject the refrigerant after the heat exchange units 10B and 60A are mounted on the vehicle), it is possible to reduce the number of man-hours during assembly.

  Further, since the inside of the heat exchanger box 46 becomes an air circulation portion corresponding to the heat exchanger (evaporator 40, second radiator 68) in the heat exchanger box 46, the air conditioning unit 10A can be shared. . In other words, using the air conditioning unit 10A as a common unit, different types of heat exchangers (evaporator 40, second radiator 68) can be replaced independently (module replacement).

  Further, in the present embodiment, the air conditioning unit 10A is disposed in the vehicle interior 18, and the heat exchanger (evaporator 40, second radiator 68) outside the vehicle interior 28 is disposed adjacent to the air conditioning unit 10A, thereby air conditioning. The air is hardly affected by the heat outside the passenger compartment 28, and the length of the air conditioning duct can be suppressed. Therefore, heat exchange performance and air blowing performance are easily ensured.

(Supplementary explanation of the embodiment)
In the above embodiment, the heat exchanger (evaporator 40, second radiator 68) and a part of the refrigerant pipe 32 are accommodated in the heat exchanger box 46. For example, a non-box-like support structure portion (for example, a support structure composed of support columns) that can be arranged in an air flow path of an air conditioning unit and supports a heat exchanger and a heat exchanger side portion of refrigerant piping And a structure in which the support structure is coupled to a plate-like body (a member corresponding to the lid 46B) for closing the opening 14A. When such a structure is applied, it is preferable that the recess 24 is formed in the air conditioning case 20 as in the above embodiment. As another modification of the above-described embodiment, the heat exchange unit may be configured not to include a box (heat exchanger box 46) (a configuration in which the heat exchanger is directly attached to and detached from the vehicle body).

  In the above embodiment, the air conditioning unit 10A is disposed on the vehicle interior 18 side. However, for example, the air conditioning unit may be disposed on the vehicle interior outside 28 side. In this case, the box (heat exchanger box 46) may be configured to be attached to and detached from the vehicle body 12 via the air conditioning unit (10A).

  Furthermore, in the structure in which the heat exchange units 10B and 60A include the heat exchanger box 46 as in the above embodiment, a configuration in which the recess 24 is not formed in the air conditioning case 20 in the above embodiment is possible.

  Furthermore, the concept of “detachable with respect to the vehicle body” in claim 1 includes that the vehicle body 12 can be directly attached to and detached from the vehicle body 12 as in the above embodiment, and can be attached to and detached from the vehicle body through other members. Is included. In addition, in the said embodiment, although the attachment / detachment part 48 is attached to the dash panel 14, the attachment / detachment part 48 may be attached together with the dash panel 14 and attached to the air conditioning case 20 of 10 A of air conditioning units.

  In addition, the said embodiment and the above-mentioned some modification can be implemented combining suitably.

DESCRIPTION OF SYMBOLS 10 Vehicle air conditioning system 10A Air conditioning unit 10B Heat exchange unit 12 Car body 14 Dash panel (partition wall)
14A Opening 18 Car interior 22 Air flow path 28 Car interior outside 32 Refrigerant piping 40 Evaporator (heat exchanger)
46 Heat exchanger box (box)
48 Detachable part 52 Air inlet 54 Air outlet 60 Vehicle air conditioning system 60A Heat exchange unit 68 Second radiator (heat exchanger)

Claims (3)

An air conditioning unit attached to the vehicle body, forming an air flow path and blowing air into the passenger compartment;
A heat exchanger and a refrigerant pipe connected to the heat exchanger are provided separately from the air conditioning unit, and are detachable from the vehicle body. When attached to the vehicle body, the heat exchanger and the refrigerant A heat exchange unit in which a part of the piping is disposed in the air flow path of the air conditioning unit;
Vehicular air conditioning system. The heat exchange unit includes a box that can be disposed in an air flow path of the air conditioning unit and that accommodates the heat exchanger side portion of the heat exchanger and the refrigerant pipe,
The box is disposed in the air flow path of the air conditioning unit, and an air introduction port is formed at a site on the upstream side of the air flow path at the arrangement position. The vehicle air conditioning system according to claim 1, wherein an air discharge port is formed at a downstream portion, and the periphery of the portion where the refrigerant pipe is attached is sealed. The air conditioning unit is disposed on the vehicle interior side with respect to the partition wall that partitions the interior and exterior of the vehicle interior,
The box can be disposed in the air flow path of the air conditioning unit through the opening formed in the partition wall from the outside of the passenger compartment with respect to the partition wall, and around the opening of the partition wall. The vehicle air conditioning system according to claim 2, further comprising an attaching / detaching portion that is attached to and detached from the vehicle.