Vehicular air-conditioning device

Abstract

To provide a vehicular air-conditioning device which can be downsized, reduced in weight and easily mounted on a vehicle.SOLUTION: A vehicular air-conditioning device 1 is provided with an air-conditioning case 10, an internal air suction port 19, a blow-off opening part 20, an external air suction port 21, an exhaust port 22, an internal air passage 23, an external air passage 27, a blower fan 13 for internal air, a blower fan 14 for external air, an electric motor 15, a compressor 37, a condenser 35, an expansion valve 38, an evaporator 31, and refrigerant piping 39. In the air-conditioning case 10, the internal air passage 23 and the external air passage 27 are arranged to overlap with each other in a vertical direction of a vehicle when mounted on the vehicle. Further, in the air-conditioning case 10, the blower fan 13 for internal air, the blower fan 14 for external air, the compressor 37, the condenser 35 and the evaporator 31 are arranged so as not to overlap with one another in a thickness direction of the air-conditioning case 10.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present disclosure relates to an air conditioning system for a vehicle. [Background technology]

[0002] 2. Description of the Related Art Vehicle air conditioners mounted on vehicles are known. The air conditioning system described in Patent Document 1 has a configuration in which a compressor, a condenser, and an outside air blower fan are arranged outside the vehicle compartment via a mounting panel provided in the rear window of the truck cabin, and an evaporator and an inside air blower fan are arranged inside the vehicle compartment via the mounting panel. The compressor, condenser, evaporator, etc. are connected by refrigerant piping to form a refrigeration cycle. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2016-120816 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, the air conditioner described in Patent Document 1 has a compressor, a condenser, and an outside air blower fan disposed on the rear side of the mounting panel, and an evaporator and an inside air blower fan disposed on the front side of the mounting panel, so that the size of the vehicle in the longitudinal direction is large. In addition, this air conditioner is installed so as to cover almost the entire rear window, so that the size of the vehicle in the width direction is also large. Therefore, this air conditioner has a problem that the bed space in the cabin becomes very narrow, which deteriorates the habitability, and the driver cannot check the rear from the rear window. In addition, this air conditioner is difficult to install in vehicles with a narrow cabin volume, such as bedless cabins of large trucks and medium-sized trucks.

[0005] Furthermore, the air conditioner described in Patent Document 1 is heavy due to an increase in the number of parts, such as the mounting panel provided in the rear window and mounting stays for mounting each component of the air conditioner, etc. Therefore, when this air conditioner is mounted on a truck, the vehicle weight increases, which causes a problem of a corresponding decrease in the maximum load capacity.

[0006] In addition, in the air conditioner described in Patent Document 1, the compressor, the condenser, and the outside air blower fan must be installed from outside the vehicle, and the evaporator and the inside air blower fan must be installed inside the vehicle. This causes a problem that it takes a long time to install the air conditioner in the vehicle. In addition, if the truck to which the air conditioner is to be installed has a loading platform, the air conditioner cannot be installed in the truck because it cannot be installed from outside the vehicle. In addition, this air conditioner requires specialized techniques such as sealing the refrigerant in the refrigerant piping after installing each component of the refrigeration cycle, and therefore cannot be easily installed in the vehicle.

[0007] In view of the above, an object of the present disclosure is to provide a vehicle air conditioner that is compact in size, lightweight, and can be easily attached to a vehicle. [Means for solving the problem]

[0008] According to one aspect of the present disclosure, an air conditioner for a vehicle mounted on a vehicle includes: An air conditioning case (10) that can be attached to a vehicle interior (3); an inside air intake port (19) provided in the air conditioning case for drawing in air from within the vehicle cabin; an air outlet opening (20) provided in the air conditioning case for blowing air into the vehicle interior; an outside air intake port (21) provided in the air conditioning case for drawing in air outside the vehicle compartment; an exhaust port (22) provided in the air conditioning case for discharging air to the outside of the vehicle compartment; an inside air passage (23) through which air sucked in through the inside air intake port flows to the outlet opening; an outside air passage (27) for allowing air drawn in from the outside air intake port to flow to the exhaust port; an indoor air blower fan (13) provided midway through the indoor air passage; an outside air blower fan (14) provided midway through the outside air passage; an electric motor (15) for driving the indoor air blower fan and the outdoor air blower fan; a compressor (37) that draws in, compresses, and discharges a refrigerant; a condenser (35) that condenses a refrigerant discharged from the compressor by heat exchange with air flowing through an outside air passage; an expansion valve (38) for reducing the pressure and expanding the refrigerant flowing out from the condenser; an evaporator (31) for evaporating the refrigerant flowing out of the expansion valve by heat exchange with air flowing through an indoor air passage; a refrigerant pipe (39) connecting a refrigerant discharge port of the compressor, a condenser, an expansion valve, an evaporator, and a refrigerant suction port of the compressor in this order; Within the air conditioning case, the inside air passage and the outside air passage are arranged so as to overlap in the vertical direction of the vehicle when installed in the vehicle, and the inside air blower fan, the outside air blower fan, the compressor, the condenser and the evaporator are arranged so as not to overlap in the thickness direction of the air conditioning case.

[0009] According to this, the vehicle air conditioner is arranged so that the inside air passage and the outside air passage overlap in the vertical direction of the vehicle when installed in the vehicle, and the relatively large components of the refrigeration cycle and the blower fan do not overlap in the thickness direction of the air conditioner case, thereby making it possible to reduce the size of the vehicle. Therefore, when this vehicle air conditioner is installed in the bed space of the cabin of a large truck, for example, the living space is secured and the driver can check the rear through the rear window without blocking the entire surface of the rear window. In addition, this vehicle air conditioner can be installed in vehicles with a small cabin volume, such as the bedless cabin of a large truck or a medium-sized truck.

[0010] Incidentally, the air conditioner described in the above Patent Document 1 is configured to mount a compressor, a condenser, and an outside air blower fan outside the vehicle cabin, and an evaporator and an inside air blower fan inside the vehicle cabin, via a mounting panel provided in the rear window. In contrast, the vehicle air conditioner disclosed herein is configured to mount all of the components of the refrigeration cycle in an air conditioner case and then mounted on the vehicle. Therefore, compared to the air conditioner described in Patent Document 1, the vehicle air conditioner disclosed herein can reduce the number of parts, such as the mounting panel and the mounting stays for each component, and can be made lighter. Therefore, when the vehicle air conditioner disclosed herein is mounted on, for example, a truck, it has little effect on the vehicle weight, and the reduction in the maximum load capacity can be suppressed.

[0011] In addition, this vehicle air conditioner is installed inside the vehicle cabin with the compressor, condenser, and outside air blower fan stored in the air conditioner case, eliminating the need for installation outside the vehicle cabin and significantly shortening the installation time in the vehicle. This vehicle air conditioner can be safely, easily, and quickly installed on trucks that are not limited to cab-equipped chassis, but also on trucks with a loading platform, without tilting the cabin. This vehicle air conditioner can be shipped with the refrigerant sealed in the refrigeration cycle, eliminating the need for specialized techniques such as sealing in the refrigerant when installing it in the vehicle, and can be easily installed in the vehicle.

[0012] The reference symbols in parentheses attached to each component indicate an example of the correspondence between the component and specific components described in the embodiments described below. [Brief description of the drawings]

[0013] [Figure 1] 1 is a perspective view showing a state in which a vehicle air conditioner according to a first embodiment is mounted in a vehicle interior of a truck. [Diagram 2] 2 is a view showing a side surface of the vehicle air conditioner, a cross section of an outlet duct, and a cross section of a bed space of the truck, taken along line II in FIG. 1. [Diagram 3] FIG. 3 is a cross-sectional view taken along line III-III in FIG. [Figure 4] 4 is a cross-sectional view taken along line IV-IV in FIG. 3. [Diagram 5] 4 is a cross-sectional view taken along line VV in FIG. 3. [Figure 6] 6 is a cross-sectional view taken along line VI-VI in FIG. [Figure 7] 7 is a cross-sectional view taken along line VII-VII in FIG. [Figure 8] FIG. 2 is a circuit diagram of the refrigeration cycle device. [Figure 9] 10 is a side view of a vehicle air conditioner according to a second embodiment, a cross-sectional view of an outlet duct, and a cross-sectional view of a bed space of a truck, the cross-sectional view corresponding to FIG. 2. [Figure 10] 10 is a cross-sectional view taken along line XX in FIG. 9. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. In the following embodiments, the same or equivalent parts are denoted by the same reference numerals, and the description thereof will be omitted.

[0015] (First embodiment) The first embodiment will be described with reference to the drawings. As shown in Fig. 1 and Fig. 2, a vehicle air conditioner 1 (hereinafter referred to as "air conditioner 1") of this embodiment is mounted in a vehicle interior 3 of a cabin 2 of a truck, for example. In detail, an air conditioner case 10 provided in the air conditioner 1 is mounted on the left side of the center of the rear window 4 in the vehicle width direction in the bed space in the vehicle interior 3, that is, on the passenger seat side in a right-hand drive vehicle. The rear window 4 is also called a back plate.

[0016] In FIG. 1, the upper, lower, front, rear, left side, and right side of the vehicle are indicated by arrows. In the following, for convenience of explanation, it is assumed that the up-down direction of the air conditioning case 10 included in the air conditioning device 1 substantially coincides with the up-down direction of the vehicle and the thickness direction of the air conditioning case 10 substantially coincides with the front-rear direction of the vehicle when the air conditioning device 1 is attached to the rear window 4. Also, for convenience of explanation, it is assumed that the width direction of the air conditioning case 10 substantially coincides with the left-right direction of the vehicle, that is, the vehicle width direction. The width direction of the air conditioning case 10 refers to a direction perpendicular to the up-down direction of the vehicle and perpendicular to the thickness direction of the air conditioning case 10. Also, for convenience of explanation, it is assumed that one side of the width direction of the air conditioning case 10 is the left side of the vehicle width direction, and the other side of the width direction of the air conditioning case 10 is the right side of the vehicle width direction.

[0017] As shown in Figs. 1 to 8, the air conditioner 1 includes an air conditioner case 10, an outlet duct 12, an inside air blower fan 13, an outside air blower fan 14, an electric motor 15, a refrigeration cycle 16, and the like.

[0018] The air conditioning case 10 is composed of a base case 17 and a design case 18. The base case 17 is disposed on the outside of the vehicle, i.e., on the rear side of the vehicle, and the design case 18 is disposed on the vehicle interior 3 side, i.e., on the front side of the vehicle. In this specification, the outside of the vehicle means the side closer to the outside of the vehicle (for example, the side closer to a window or wall such as the rear window 4), and the inside of the vehicle 3 side means the side closer to the center of the vehicle interior 3 (for example, the side farther from a window or wall such as the rear window 4). The air conditioning case 10 is provided with an inside air intake 19, an outlet opening 20, an outside air intake 21, and an exhaust 22. The inside air intake 19 is provided in the design case 18, and the outside air intake 21 and the exhaust 22 are provided in the base case 17.

[0019] As shown in Figures 1, 3, 4 and 6, the inside air intake port 19 is an opening for drawing air from within the vehicle cabin into the air conditioning case 10. The inside air intake port 19 is provided in a portion of the air conditioning case 10 on one side in the width direction from the center. Specifically, the inside air intake port 19 is provided in a portion of the air conditioning case 10 on the left side in the vehicle width direction from the center, facing toward the front of the vehicle. In Figure 3, the position of the inside air intake port 19 is indicated by a dashed line.

[0020] The blow-out opening 20 is an opening for blowing out the air that has been sucked into the air-conditioning case 10 from the inside air inlet 19 and passed through an inside air passage 23 (described later) into the vehicle interior 3. The blow-out opening 20 is provided in a portion of the air-conditioning case 10 on the other side in the width direction from the center. Specifically, the blow-out opening 20 is provided in a portion of the air-conditioning case 10 on the right side in the vehicle width direction from the center, facing diagonally upward. The blow-out opening 20 is connected to the blow-out duct 12.

[0021] As shown in Fig. 1 and Fig. 2, the blow-out duct 12 is connected to the blow-out opening 20. The blow-out duct 12 is a duct for guiding the conditioned air blown out from the blow-out opening 20 to the vicinity of the body of the occupant. The conditioned air flowing through the inside air passage 23 is blown out from the blow-out opening 20 through the blow-out duct 12 into the vehicle interior 3. The blow-out duct 12 is disposed above the rear window 4. This ensures a rearward visibility space from the rear window 4.

[0022] As shown in FIG. 1, the end of the blow-out duct 12 opposite to the blow-out opening 20 is provided with a plurality of grills 24, 25, 26 capable of adjusting the blow-out direction and the amount of air of the conditioned air. Specifically, one grill 24 is provided at the tip of the blow-out duct 12 in the direction in which the flow path axis extends, and two grills 25, 26 are provided in the middle of the blow-out duct 12. By adjusting the direction of the one grill 24 provided at the tip of the blow-out duct 12, it is possible to blow the conditioned air to the upper body of the occupant lying on the bed 5 and the upper body of the occupant sitting in the driver's seat. By adjusting the direction of the two grills 25, 26 provided in the middle of the blow-out duct 12, it is possible to blow the conditioned air to the upper and lower bodies of the occupant lying on the bed 5. In this way, the air conditioner 1 can intensively condition the area around the passengers by using the conditioned air blown out from the outlet duct 12, so it consumes less power and can be used for a long time even when operated using the main battery of the vehicle as a power source. In addition, the passengers can be kept comfortable even in the harsh environment of a midsummer day.

[0023] 2 and 3, the outside air intake 21 is an opening for drawing air outside the vehicle cabin into the air conditioning case 10. The outside air intake 21 is provided in a portion of the air conditioning case 10 on the other side in the width direction from the center. Specifically, the outside air intake 21 is provided in a portion of the air conditioning case 10 on the right side in the vehicle width direction from the center, protruding from the rear window 4 to the outside of the vehicle cabin.

[0024] 2, 3, and 5, the exhaust port 22 is an opening for discharging air that has been drawn into the air-conditioning case 10 from the outside air inlet 21 and passed through an outside air passage (described later) to the outside of the vehicle cabin. The exhaust port 22 is provided in a portion of the air-conditioning case 10 on the other side in the width direction from the center. Specifically, the exhaust port 22 is provided in a portion of the air-conditioning case 10 on the right side in the vehicle width direction from the center, protruding from the rear window 4 to the outside of the vehicle cabin.

[0025] As shown in Figs. 3 to 7, an inside air passage 23 and an outside air passage 27 are provided in the air conditioning case 10. The inside air passage 23 is a passage through which air sucked in from the inside air inlet 19 flows to the blow-out opening 20. The outside air passage 27 is a passage through which air sucked in from the outside air inlet 21 flows to the exhaust port 22. As shown in Fig. 3, a partition wall 28 is provided in the air conditioning case 10 to separate the inside air passage 23 and the outside air passage 27. The partition wall 28 extends in the width direction of the air conditioning case 10 while being inclined or bent in the vertical direction. Therefore, in the air conditioning case 10, the inside air passage 23 and the outside air passage 27 are arranged so as to overlap in the vertical direction of the vehicle when mounted on the vehicle. Specifically, in the air conditioning case 10, the inside air passage 23 is arranged above the outside air passage 27 in the vertical direction of the vehicle when mounted on the vehicle.

[0026] As shown in Figs. 3, 4 and 6, the inside air passage 23 has an upstream inside air passage 231 and a downstream inside air passage 232. In the area above the partition wall 28 in the air conditioning case 10, an inside air blower case 29 and an evaporator case 30 are provided. The upstream inside air passage 231 is a passage formed outside the inside air blower case 29 and the evaporator case 30. The downstream inside air passage 232 is a passage formed inside the inside air blower case 29 and the evaporator case 30. Here, the upstream inside air passage 231 is formed in a relatively wide space outside the inside air blower case 29 and the evaporator case 30 in the air conditioning case 10, so that the pressure loss of the air flowing therethrough can be reduced. In addition, the downstream inside air passage 232 extends in the width direction of the air conditioning case 10, so that the pressure loss of the air flowing therethrough can be reduced.

[0027] 3, 4 and 7, an evaporator 31 constituting the refrigeration cycle 16 is provided inside the evaporator case 30. The evaporator 31 is, for example, a stacked heat exchanger configured so that refrigerant flows through a plurality of refrigerant passages stacked at predetermined intervals and air flows through the gaps between the refrigerant passages.

[0028] As shown in Figs. 3, 4 and 6, the inside air blower fan 13 is provided inside the inside air blower case 29. That is, the inside air blower fan 13 is provided midway through the inside air passage 23. The inside air blower fan 13 is provided at a portion of the air conditioning case 10 on one side in the width direction from the center, that is, on the left side in the vehicle width direction. For example, a centrifugal fan is used as the inside air blower fan 13. A bell mouth 291 provided in the inside air blower case 29 corresponds to the suction portion of the inside air blower fan 13. A cylindrical surface connecting the rear edges of multiple blades of the inside air blower fan 13 in the circumferential direction corresponds to the blowing portion of the inside air blower fan 13.

[0029] When the inside air blower fan 13 rotates, air in the vehicle cabin is drawn from the inside air inlet 19 into the upstream inside air passage 231 in the air conditioning case 10. The air is drawn into the inside of the inside air blower fan 13 through a bell mouth 291 provided in the inside air blower case 29, and then blown out radially outward from the inside air blower fan 13. The air then passes through the downstream inside air passage 232 and the evaporator 31, and is blown out from the blow-out opening 20 through the blow-out duct 12 into the vehicle cabin 3.

[0030] As shown in Figs. 3, 5, 6 and 7, the outside air passage 27 has an upstream outside air passage 271 and a downstream outside air passage 272. In the area below the partition wall 28 in the air conditioning case 10, the upstream outside air passage case 32, the condenser case 33 and the outside air blower case 34 are provided. The upstream outside air passage case 32 is provided above the condenser case 33, on the passenger compartment 3 side (i.e., the vehicle front side) and outside the outside air blower case 34. The upstream outside air passage 271 is a passage formed inside the upstream outside air passage case 32 and outside the outside air blower case 34 and the condenser case 33. The downstream outside air passage 272 is a passage formed inside the condenser case 33 and the outside air blower case 34. As shown in Fig. 5, at least a part of the upstream outside air passage 271 is disposed on the passenger compartment 3 side, i.e., the vehicle front side, with respect to the downstream outside air passage 272 when mounted on the vehicle. In other words, at least a part of the downstream outside air passage 272 is disposed outside the passenger compartment, that is, on the vehicle rear side, relative to the upstream outside air passage 271 when the vehicle is mounted thereon.

[0031] Here, the outside air passage 27 is substantially U-shaped with the upstream outside air passage 271 and the downstream outside air passage 272. The upstream outside air passage 271 extends in the width direction of the air conditioning case 10, so that the pressure loss of the air flowing therethrough can be reduced. In addition, the downstream outside air passage 272 also extends in the width direction of the air conditioning case 10, so that the pressure loss of the air flowing therethrough can be reduced.

[0032] As shown in FIG. 3, FIG. 5, and FIG. 7, the condenser 35 constituting the refrigeration cycle 16 is provided inside the condenser case 33. The condenser 35 is, for example, a fin-and-tube type heat exchanger having a tube through which the refrigerant flows and a plurality of fins connected to the outer wall of the tube. The condenser 35 is disposed obliquely with respect to the center of the flow path of the downstream outside air passage 272 when viewed from the top-bottom direction of the vehicle. In detail, an end 351 of the condenser 35 on the side of the outside air blower fan 14 is disposed on the outside of the vehicle cabin, i.e., on the rear side of the vehicle, when mounted on the vehicle, and an end 352 of the condenser 35 opposite to the outside air blower fan 14 is disposed on the inside 3 side of the vehicle cabin, i.e., on the front side of the vehicle, when mounted on the vehicle. This allows the size of the air conditioner 1 to be reduced and the pressure loss of the air passing through the condenser 35 to be reduced.

[0033] The condenser 35 is provided at an end 352 opposite to the outside air blower fan 14 with a modulator 36 as a gas-liquid separator. The modulator 36 is a liquid reservoir that separates the refrigerant flowing out from the upstream tube of the condenser 35 into a gas phase refrigerant and a liquid phase refrigerant and stores them, and flows only the liquid phase refrigerant to the downstream tube of the condenser 35. The modulator 36 is provided at a location of the condenser case 33 that protrudes outward from the downstream side outside air passage 272 and where there is almost no wind flow. Therefore, the pressure loss of the air flowing through the downstream side outside air passage 272 can be reduced.

[0034] As shown in Figs. 3, 5 and 6, the outside air blower fan 14 is provided inside the outside air blower case 34. That is, the outside air blower fan 14 is provided midway through the outside air passage 27. The outside air blower fan 14 is provided at a portion of the air conditioning case 10 on one side in the width direction from the center, that is, on the left side in the vehicle width direction. For example, a centrifugal fan is used as the outside air blower fan 14. A bell mouth 341 provided in the outside air blower case 34 corresponds to the suction part of the outside air blower fan 14. A cylindrical surface connecting the trailing edges of multiple blades of the outside air blower fan 14 in the circumferential direction corresponds to the blowing part of the outside air blower fan 14.

[0035] When the outside air blower fan 14 rotates, air outside the vehicle cabin is drawn from the outside air inlet port 21 into the upstream outside air passage 271 in the air conditioning case 10. The air is drawn into the inside of the outside air blower fan 14 through a bell mouth 341 provided in the outside air blower case 34, and then blown outward in the radial direction of the outside air blower fan 14. The air then passes through the downstream outside air passage 272 and the condenser 35, and is then exhausted to the outside of the vehicle cabin from the exhaust port 22.

[0036] 3 and 6, the electric motor 15 and a motor drive circuit board 152 that drives the electric motor 15 are provided between the inside air blower fan 13 and the outside air blower fan 14. Note that in Fig. 6, the electric motor 15 and the motor drive circuit board 152 are illustrated as an integrated unit. The electric motor 15 and the motor drive circuit board 152 are provided in the inside air passage 23 above the partition wall 28.

[0037] The rotation axis CL of the inside air blower fan 13, the rotation axis CL of the outside air blower fan 14, and the rotation axis CL of the electric motor 15 coincide with each other and extend in the vertical direction of the vehicle when mounted on the vehicle. A double-shaft electric motor 151 is used as the electric motor 15. The double-shaft electric motor 151 has shafts 153, 154 extending on both sides of the rotation axis CL. The inside air blower fan 13 is fixed to a portion 153 of the shafts 153, 154 that extends from the double-shaft electric motor main body toward the upper side of the vehicle, and the outside air blower fan 14 is fixed to a portion 154 of the shafts 153, 154 that extends from the double-shaft electric motor main body toward the lower side of the vehicle. The double-shaft electric motor 151 is capable of rotating the inside air blower fan 13 and the outside air blower fan 14 simultaneously.

[0038] As shown in Figs. 3 to 8, a refrigeration cycle 16 is provided inside the air conditioning case 10. The refrigeration cycle 16 is a vapor compression refrigeration cycle in which a compressor 37, a condenser 35, a modulator 36, an expansion valve 38, an evaporator 31, and the like are connected by a refrigerant pipe 39 to circulate the refrigerant. Note that in Figs. 3 to 7, the expansion valve 38 and the refrigerant pipe 39 are omitted from illustration. For example, an HFC-based refrigerant (e.g., R134a) or an HFO-based refrigerant (e.g., R1234yf) is used as the refrigerant circulating through the refrigeration cycle 16. Note that a natural refrigerant (e.g., carbon dioxide) or the like may also be used as the refrigerant. An arrow RF in Fig. 8 indicates the direction in which the refrigerant flows through the refrigerant pipe 39.

[0039] As shown in FIG. 3, FIG. 6, and FIG. 8, the compressor 37 is an electric compressor having an electric motor 40, a refrigerant compression section 41, and the like. The electric motor 40 is driven to rotate by power supplied from an inverter 42. The refrigerant compression section 41 is driven by the electric motor 40, compresses the refrigerant sucked from a refrigerant suction port 43, and discharges the refrigerant from a refrigerant discharge port 44. When mounted on the vehicle, the compressor 37 is disposed below the inside air blower fan 13 and the outside air blower fan 14 in the direction of gravity. The compressor 37 is fixed to the air conditioning case 10 by a compressor holding bracket 45. When mounted on the vehicle, the compressor 37 is disposed so that the rotation axis CL_comp of the electric motor 15 and the refrigerant compression section 41 intersects with the rotation axis CL of the inside air blower fan 13, the outside air blower fan 14, and the dual-shaft electric motor 151, specifically, is substantially horizontal. When mounted on the vehicle, the inverter 42 is disposed inside the air conditioning case 10 on the outer side of the vehicle compartment relative to the compressor 37, that is, on the rear side of the vehicle.

[0040] The high-temperature, high-pressure refrigerant discharged from the refrigerant discharge port 44 of the compressor 37 flows into the condenser 35. The condenser 35 is a heat exchanger that exchanges heat between the refrigerant and air. The refrigerant flowing through the condenser 35 dissipates heat to the air flowing through the outside air passage 27 and is condensed. The refrigerant that flows out of the upstream tube of the condenser 35 flows into the modulator 36 and is separated into a gas phase refrigerant and a liquid phase refrigerant, and only the liquid phase refrigerant flows into the downstream tube of the condenser 35 and is supercooled.

[0041] The refrigerant flowing out from the tube on the downstream side of the condenser 35 is decompressed and expanded when passing through the expansion valve 38, and flows into the evaporator 31 in a gas-liquid two-phase state. As the expansion valve 38, a variable throttle such as a temperature type expansion valve or an electronic expansion valve, or a fixed throttle may be used.

[0042] The evaporator 31 is a heat exchanger that exchanges heat between the refrigerant and air. The refrigerant flowing through the evaporator 31 absorbs heat from the air flowing through the indoor air passage 23 and evaporates. Therefore, the air flowing through the indoor air passage 23 is cooled when passing through the evaporator 31, and becomes conditioned air. The refrigerant flowing out of the evaporator 31 is sucked into the refrigerant suction port 43 of the compressor 37.

[0043] The compressor 37, condenser 35, and evaporator 31, which constitute the above-mentioned refrigeration cycle 16, and the inside air blower fan 13 and outside air blower fan 14 are arranged so as not to overlap in the thickness direction of the air conditioning case 10. The air conditioner 1 is arranged so that the inside air passage 23 and the outside air passage 27 overlap in the vertical direction of the vehicle when mounted on the vehicle within the air conditioning case 10, and the relatively large components of the refrigeration cycle 16 and the blower fan are arranged so as not to overlap in the thickness direction of the air conditioning case 10, thereby making it possible to reduce the size of the air conditioner.

[0044] In the manufacturing process of the air conditioner 1, the components of the refrigeration cycle 16 described above, the cases 29, 30, 32, 33, and 34 that form the indoor air passage 23 and the outdoor air passage 27, the indoor air blower fan 13, the outdoor air blower fan 14, and the electric motor 15 are assembled to the base case 17 of the air conditioning case 10. After refrigerant is injected into the refrigerant piping 39 of the refrigeration cycle 16, the air conditioner 1 is shipped with the base case 17 and the decorative case 18 assembled.

[0045] When mounting the air conditioner 1 on a vehicle, the rear window 4 can be replaced with a back plate designed specifically for the vehicle, and the air conditioner 1 can be attached to the vehicle using an attachment designed specifically for the vehicle. The air conditioner 1 can be installed on the vehicle by performing work only inside the vehicle compartment 3.

[0046] The air conditioner 1 of the first embodiment described above provides the following advantages. (1) In the air conditioner 1 of this embodiment, the inside air passage 23 and the outside air passage 27 are arranged so as to overlap in the vertical direction of the vehicle when mounted on the vehicle inside the air conditioner case 10. Also, inside the air conditioner case 10, the inside air blower fan 13, the outside air blower fan 14, the compressor 37, the condenser 35, and the evaporator 31 are arranged so as not to overlap in the thickness direction of the air conditioner case 10. This allows the air conditioner 1 to be compact in size in the thickness direction of the air conditioner case 10. Therefore, when this air conditioner 1 is mounted, for example, in the bed space of the cabin 2 of a large truck, living space is ensured and the driver can check behind through the rear window 4 without blocking the entire surface of the rear window 4. In addition, this air conditioner 1 can be mounted in vehicles with a small cabin volume, such as the bedless cabin of a large truck or a medium-sized truck.

[0047] Incidentally, the air conditioner described in the above Patent Document 1 is configured to mount a compressor, a condenser, and an outside air blower fan outside the vehicle cabin, and an evaporator and an inside air blower fan inside the vehicle cabin, via a mounting panel provided in the rear window. In contrast, the air conditioner 1 of the present embodiment is configured to mount all of the components of the refrigeration cycle 16 in the air conditioner case 10, and is mounted on the vehicle. Therefore, compared to the air conditioner described in Patent Document 1, the air conditioner 1 of the present embodiment can reduce the number of parts, such as the mounting panel and the mounting stays for each component, and can be made lighter. Therefore, when the air conditioner 1 of the present embodiment is mounted on, for example, a truck, it has little effect on the vehicle weight, and the reduction in the maximum load capacity can be suppressed.

[0048] In addition, the air conditioner 1 of this embodiment is installed in the vehicle interior 3 with the compressor 37, condenser 35, and outside air blower fan 14 stored in the air conditioner case 10, eliminating the need for installation outside the vehicle, and significantly shortening the installation time to the vehicle. Furthermore, this air conditioner 1 can be safely, easily, and quickly installed without tilting the cabin 2, even if the truck to which it is to be installed is not limited to a cab-equipped chassis, but is equipped with a loading platform. Furthermore, since this air conditioner 1 can be shipped with the refrigerant sealed in the refrigeration cycle 16, specialized techniques such as sealing in the refrigerant are not required when installing it to the vehicle, and it can be easily installed to the vehicle.

[0049] (2) In this embodiment, the inside air intake port 19 is provided in a portion on one side in the width direction from the center of the air conditioning case 10. The blow-out opening portion 20 is provided in a portion on the other side in the width direction from the center of the air conditioning case 10. The inside air passage 23 extends in the width direction of the air conditioning case 10. This allows air to flow through the indoor air passage 23 in a single stroke, reducing pressure loss of the air flowing through the indoor air passage 23. This improves the blowing efficiency of the indoor air blower fan 13 and reduces power consumption of the electric motor 15.

[0050] (3) In this embodiment, both the outside air inlet 21 and the exhaust port 22 are provided in a portion on the other widthwise side of the center of the air conditioning case 10. The outside air blower fan 14 is provided in a portion on one widthwise side of the center of the air conditioning case 10. At least a portion of the upstream outside air passage 271 is disposed on the passenger compartment 3 side with respect to the downstream outside air passage 272 when mounted on the vehicle. According to this, the outside air passage 27 becomes U-shaped, and it is possible to reduce the pressure loss of the air flowing through each of the upstream outside air passage 271 and the downstream outside air passage 272. Therefore, it is possible to improve the blowing efficiency of the outside air blower fan 14 and reduce the power consumption of the electric motor 15. In addition, by arranging the upstream outside air passage 271 on the passenger compartment 3 side relative to the downstream outside air passage 272 in which the condenser 35 is provided, the heat of the refrigerant flowing through the condenser 35 can be prevented from being transmitted to occupants in the passenger compartment 3.

[0051] (4) In this embodiment, a fin-and-tube type heat exchanger is used for the condenser 35, and is disposed at an angle with respect to the center of the flow path of the downstream outside air passage 272 when viewed from the top-bottom direction of the vehicle. In detail, an end 351 of the condenser 35 on the side of the outside air blower fan 14 is disposed outside the vehicle cabin when mounted on the vehicle, and an end 352 of the condenser 35 opposite the outside air blower fan 14 is disposed inside the vehicle cabin 3 when mounted on the vehicle. According to this, by disposing the condenser 35 at an angle, the size of the air conditioner 1 can be reduced, and further, the pressure loss of the air passing through the condenser 35 in the downstream outside air passage 272 can be reduced. Therefore, the blowing efficiency of the outside air blower fan 14 can be improved, and the power consumption of the electric motor 15 can be reduced.

[0052] (5) In this embodiment, when installed in the vehicle, the air conditioning case 10 is attached to a portion on the left side of the center of the rear window 4 of the vehicle in the vehicle width direction. However, the air conditioning device described in the above Patent Document 1 is large in size, so it covers almost the entire area of ​​the rear window of a large truck and is installed with a large protrusion into the vehicle cabin. Therefore, it interferes with the upper body of the occupant when he sleeps in the bed space, making it less comfortable to live in. In addition, the movement line when the occupant moves from the driver's seat to the bed space is narrow. In addition, the air conditioning device described in the above Patent Document 1 does not allow the driver to check the rear from the rear window. Furthermore, the air conditioning device described in the above Patent Document 1 cannot be installed in vehicles with a small cabin volume, such as bedless cabins of large trucks and medium-sized trucks. In contrast, the air conditioner 1 of this embodiment is compact due to the all-in-one package, so it can be installed on the left or right side of the center of the rear window 4 of a large truck in the vehicle width direction. This ensures a living space for the occupant to sleep in the bed. In addition, the movement line of the occupant when moving from the driver's seat to the bed space is not narrowed. In addition, since the air conditioner 1 of this embodiment is configured to cover only a part of the rear window 4, a rear visibility space can be ensured on the rear window 4, and the driver can check the rear from the rear window 4. Furthermore, the air conditioner 1 of this embodiment can be installed in vehicles with a small cabin volume, such as a bedless cabin of a large truck or a medium-sized truck.

[0053] (6) In this embodiment, when the device is installed in the vehicle, the outside air intake port 21 and the exhaust port 22 protrude from the rear window 4 to the outside of the vehicle compartment. According to this, outside air can be taken into the outside air passage 27 through the outside air inlet 21. Also, the outside air can be exhausted from the exhaust port 22 to the outside of the vehicle compartment.

[0054] (7) The air conditioner 1 of this embodiment includes the outlet duct 12 connected to the outlet opening 20. The conditioned air flowing through the interior air passage 23 is blown out from the outlet opening 20 through the outlet duct 12 into the vehicle interior 3. However, the air conditioner described in the above Patent Document 1 consumes a lot of power to condition the entire cabin. Therefore, when it operates using the main battery of the vehicle as a power source, it cannot be used for a long time. In addition, when the cooling capacity is restricted to reduce power consumption, the passengers feel hot and cannot be comfortable. In contrast, the air conditioner 1 of this embodiment can intensively condition the area around the passengers by using the conditioned air blown out from the outlet duct 12, so it consumes less power and can be used for a long time even when operated using the main battery of the vehicle as a power source. In addition, passengers can be kept comfortable even in the harsh environment of a midsummer day. By arranging the outlet duct 12 at the upper or lower part of the rear window 4, a rearward visibility space can be secured.

[0055] (8) In this embodiment, the air outlet duct 12 is provided with a plurality of grilles 24, 25, 26 that can adjust the direction and volume of the conditioned airflow. According to this, by adjusting the multiple grilles 24, 25, 26 provided on the air outlet duct 12, the area around the driver can be intensively air-conditioned both when the driver is resting in the driver's seat and when the driver is resting on the bed 5.

[0056] (9) In this embodiment, a dual-shaft electric motor 151 is used to simultaneously operate the indoor air blower fan 13 and the outdoor air blower fan 14. The indoor air blower fan 13, the outdoor air blower fan 14 and the dual-shaft electric motor 151 have the same rotation axis CL. However, the air conditioner described in Patent Document 1 includes an electric motor that operates an inside air blower fan and another electric motor that operates an outside air blower fan, which results in problems such as an increase in the size and weight of the air conditioner and an increase in manufacturing costs. In contrast, the air conditioner 1 of this embodiment utilizes a dual-shaft electric motor 151 that simultaneously operates the inside air blower fan 13 and the outside air blower fan 14, making it possible to reduce the number of electric motors 15. This allows for a smaller size, reduced weight, and reduced manufacturing costs. Furthermore, by using a blower fan that draws in air from both sides of the rotation axis CL in conjunction with the use of the dual-shaft electric motor 151, the air blowing efficiency can be improved and the power consumption of the dual-shaft electric motor 151 can be reduced.

[0057] (10) In this embodiment, the motor drive circuit board 152 is provided in the interior air passage 23. According to this, even if rain or the like enters the outside air passage 27 from the outside air inlet 21, the motor drive circuit board 152 can be prevented from getting wet.

[0058] (11) In this embodiment, when mounted on the vehicle, the compressor 37 is disposed below the inside air blower fan 13 and the outside air blower fan 14 in the direction of gravity. According to this, by disposing the compressor 37, which is heavier among the components of the refrigeration cycle 16, on the lower side in the direction of gravity, the position of the center of gravity can be lowered, and vibration of the air conditioning case 10 can be suppressed.

[0059] (12) In this embodiment, the inverter 42 that supplies power to the electric motor 40 of the compressor 37 is disposed inside the air conditioning case 10 on the vehicle exterior side relative to the compressor 37 . This can prevent noise generated by the inverter 42 from being transmitted to passengers in the vehicle interior 3.

[0060] (13) In this embodiment, when mounted on the vehicle, the compressor 37 is positioned so that the rotation axis CL_comp of the electric motor 15 intersects with the rotation axis CL of the inside air blower fan 13, the outside air blower fan 14, and the dual-shaft electric motor 151. According to this, the compressor 37 is generally large in size in the direction in which the rotation axis CL_comp of the electric motor 15 extends. Therefore, by disposing the rotation axis CL_comp of the electric motor 15 in a direction intersecting the rotation axis CL of the indoor air blower fan 13, etc., the compressor 37 can reduce the size of the air conditioner 1.

[0061] (14) In this embodiment, the modulator 36 serving as a gas-liquid separator is disposed on the opposite side of the condenser 35 from the outside air blower fan 14 . This can reduce the pressure loss of the air flowing through the outside air passage 27. As a result, the blowing efficiency of the outside air blower fan 14 can be improved and the power consumption of the electric motor 15 can be reduced.

[0062] Second embodiment The second embodiment will be described. The second embodiment is different from the first embodiment in that the configuration of the outside air passage 27 is changed so that the vehicle interior 3 can be ventilated, and other aspects are the same as those of the first embodiment, so only the differences from the first embodiment will be described.

[0063] 9 and 10, in the second embodiment, an inside air intake port for ventilation 46 is provided in the air conditioning case 10. In detail, the inside air intake port for ventilation 46 is provided in a surface of the air conditioning case 10 facing the right side in the vehicle width direction. The inside air intake port for ventilation 46 communicates with the upstream outside air passage 271. The inside air intake port for ventilation 46 is an opening for allowing air in the vehicle cabin to flow into the upstream outside air passage 271.

[0064] Further, a ventilation door 47 is provided in the upstream outside air passage 271. The ventilation door 47 can switch between communication and blocking between the ventilation inside air intake port 46 and the upstream outside air passage 271, and can switch between communication and blocking between the outside air intake port 21 and the upstream outside air passage 271.

[0065] 10, the ventilation door 47 communicates the ventilation inside air intake port 46 with the upstream outside air passage 271 and blocks the outside air intake port 21 with the upstream outside air passage 271. In this state, when the outside air blower fan 14 rotates, air inside the vehicle cabin is sucked from the ventilation inside air intake port 46 into the upstream outside air passage 271, and the air passes from the outside air blower fan 14 through the downstream outside air passage 272 and is exhausted to the outside of the vehicle cabin through the exhaust port 22. Therefore, the air inside the vehicle cabin can be ventilated.

[0066] 10, the ventilation door 47 blocks the ventilation inside air intake 46 from the upstream outside air passage 271 and connects the outside air intake 21 to the upstream outside air passage 271. In this state, when the outside air blower fan 14 rotates, air outside the vehicle cabin is sucked from the outside air intake 21 into the upstream outside air passage 271, and the air passes from the outside air blower fan 14 through the downstream outside air passage 272 and is exhausted to the outside of the vehicle cabin from the exhaust port 22, as in the first embodiment.

[0067] The air conditioner 1 of the second embodiment described above provides the following advantageous effects in addition to the advantageous effects described in the first embodiment. In the second embodiment, the air conditioner 1 further includes a ventilation inside air inlet 46 and a ventilation door 47. According to this, by operating the ventilation door 47, the ventilation inside air intake 46 is connected to the upstream outside air passage 271 and the outside air intake 21 is blocked from the upstream outside air passage 271, so that the air inside the vehicle cabin can be exhausted to the outside of the vehicle cabin, thereby ventilating the interior 3 of the vehicle cabin.

[0068] (Other embodiments) (1) In each of the above embodiments, the air conditioner 1 is described as being installed in, for example, a truck, but this is not limiting. The air conditioner 1 can also be installed in various vehicles, such as a pickup truck, a bus, or a camper.

[0069] (2) In each of the above embodiments, the air conditioner 1 has been described as being mounted, for example, to the left of the center of the rear window 4 in the bed space inside the vehicle interior 3 in the vehicle width direction, but this is not limited to the above. The air conditioner 1 may be mounted, for example, to the right of the center of the rear window 4 in the bed space inside the vehicle interior 3 in the vehicle width direction, or may be mounted in the center of the rear window 4. Alternatively, the air conditioner 1 may be mounted in any location inside the vehicle interior 3 other than the rear window 4.

[0070] (3) In each of the above embodiments, the double-shaft electric motor 151 is used as the electric motor 15 that drives the indoor air blower fan 13 and the outdoor air blower fan 14, but this is not limited to the above. For example, the electric motor 15 may be two electric motors, such as a single-shaft electric motor that drives the indoor air blower fan 13 and a single-shaft electric motor that drives the outdoor air blower fan 14.

[0071] (4) In each of the above embodiments, the inside air passage 23 is disposed above the outside air passage 27 in the vehicle vertical direction within the air conditioning case 10. However, this is not limited to this. The inside air passage 23 may be disposed below the outside air passage 27 in the vehicle vertical direction within the air conditioning case 10.

[0072] (5) In each of the above embodiments, for convenience of explanation, one side in the width direction of the air conditioning case 10 is the left side in the vehicle width direction and the other side in the width direction of the air conditioning case 10 is the right side in the vehicle width direction, but this is not limited to this. One side in the width direction of the air conditioning case 10 may be the right side in the vehicle width direction and the other side in the width direction of the air conditioning case 10 may be the left side in the vehicle width direction.

[0073] (6) In each of the above embodiments, the compressor 37 is disposed so that the rotation axis CL_comp of the electric motor 15 and the refrigerant compressing section 41 intersects with the rotation axis CL of the indoor air blower fan 13, the outdoor air blower fan 14, and the dual-shaft electric motor 151. However, this is not limited to this. The compressor 37 may be disposed so that the rotation axis CL_comp of the electric motor 15 and the refrigerant compressing section 41 is parallel to the rotation axis CL of the indoor air blower fan 13, the outdoor air blower fan 14, or the dual-shaft electric motor 151.

[0074] The present disclosure is not limited to the above-mentioned embodiments, and can be appropriately modified within the scope of the claims. In addition, the above-mentioned embodiments and parts thereof are not unrelated to each other, and can be appropriately combined except when the combination is clearly impossible. In addition, in each of the above-mentioned embodiments, it goes without saying that the elements constituting the embodiment are not necessarily essential, except when it is specifically stated that they are essential or when it is clearly considered to be essential in principle. In addition, in each of the above-mentioned embodiments, when the numbers, values, amounts, ranges, etc. of the components of the embodiment are mentioned, they are not limited to the specific numbers, except when it is specifically stated that they are essential or when it is clearly limited to a specific number in principle. In addition, in each of the above-mentioned embodiments, when the shape, positional relationship, etc. of the components are mentioned, they are not limited to the shape, positional relationship, etc., except when it is specifically stated that they are essential or when it is clearly limited to a specific shape, positional relationship, etc. in principle.

[0075] (In view of the present disclosure) The present disclosure described above can be understood from the following viewpoints, for example. [First viewpoint] In an air conditioner for a vehicle, An air conditioning case (10) that can be attached to a vehicle interior (3); an inside air intake port (19) provided in the air conditioning case for taking in air from within the vehicle cabin; an air outlet opening (20) provided in the air conditioning case for blowing air into the vehicle interior; an outside air intake port (21) provided in the air conditioning case for drawing in air outside the vehicle compartment; an exhaust port (22) provided in the air conditioning case for discharging air to the outside of the vehicle compartment; an inside air passage (23) through which air sucked through the inside air suction port flows to the outlet opening; an outside air passage (27) through which air sucked in through the outside air inlet flows to the exhaust port; an indoor air blower fan (13) provided midway through the indoor air passage; an outside air blower fan (14) provided midway through the outside air passage; an electric motor (15) for driving the indoor air blower fan and the outdoor air blower fan; a compressor (37) that draws in, compresses, and discharges a refrigerant; a condenser (35) that condenses the refrigerant discharged from the compressor by heat exchange with air flowing through the outside air passage; an expansion valve (38) for reducing the pressure and expanding the refrigerant flowing out from the condenser; an evaporator (31) that evaporates the refrigerant flowing out of the expansion valve by heat exchange with air flowing through the indoor air passage; a refrigerant piping (39) connecting a refrigerant discharge port of the compressor, the condenser, the expansion valve, the evaporator, and a refrigerant suction port of the compressor in this order, within the air conditioning case, the inside air passage and the outside air passage are arranged so as to overlap in the vertical direction of the vehicle when mounted on the vehicle, and the inside air blower fan, the outside air blower fan, the compressor, the condenser and the evaporator are arranged so as not to overlap in the thickness direction of the air conditioning case. [Second viewpoint] When the direction perpendicular to the vehicle up-down direction when the air conditioning case is installed in the vehicle and perpendicular to the thickness direction of the air conditioning case is referred to as the width direction of the air conditioning case, The inside air intake port is provided at a portion of the air conditioning case that is closer to one side in a width direction than a center thereof, The air outlet opening is provided at a portion of the air conditioning case on the other side in a width direction from a center thereof, The vehicle air conditioner according to a first aspect, wherein the inside air passage extends in a width direction of the air conditioning case. [Third Perspective] The outside air intake port is provided at a portion of the air conditioning case on the other side in a width direction from a center thereof, The exhaust port is also provided at a portion of the air conditioning case that is on the other side in the width direction from the center, The outside air blower fan is provided at a portion of the air conditioning case that is closer to one side in a width direction than a center thereof, the outdoor air passage includes an upstream outdoor air passage (271) that communicates between the outdoor air inlet and a suction portion of the outdoor air blower fan, and a downstream outdoor air passage (272) that communicates between a blowing portion of the outdoor air blower fan and the exhaust port, The condenser is provided in the downstream outside air passage, The vehicle air conditioner according to the first or second aspect, wherein at least a portion of the downstream outside air passage is disposed on the outer side of the vehicle compartment relative to the upstream outside air passage when the vehicle is mounted thereon. [Fourth viewpoint] the condenser is a fin-and-tube heat exchanger having a tube through which a refrigerant flows and a plurality of fins connected to an outer wall of the tube, The vehicle air conditioning device according to a third aspect, wherein the condenser is disposed obliquely with respect to a flow path center of the downstream outside air passage when viewed from a top-bottom direction of the vehicle, an end (351) of the condenser on the outside air blower fan side is disposed outside the vehicle cabin when mounted on the vehicle, and an end (352) of the condenser opposite the outside air blower fan is disposed inside the vehicle cabin when mounted on the vehicle. [Fifth viewpoint] an inside air intake port (46) for ventilation provided in the air conditioning case and for allowing air in the vehicle cabin to flow into the upstream outside air passage; The vehicle air conditioning device according to the third or fourth aspect, further comprising a ventilation door (47) that switches between communication between the ventilation inside air inlet and the upstream outside air passage and between communication between the outside air inlet and the upstream outside air passage. [Sixth viewpoint] The vehicle air conditioner according to any one of the first to fifth aspects, wherein, when mounted on a vehicle, the air conditioning case can be attached to a portion on the right or left side of a center of a rear window (4) of the vehicle in a vehicle width direction. [Seventh viewpoint] The vehicle air conditioner according to any one of the first to sixth aspects, wherein, when mounted on the vehicle, the outside air inlet and the exhaust port protrude from a rear window of the vehicle to the outside of the vehicle compartment. [Eighth viewpoint] The air outlet further includes an air outlet duct (12) connected to the air outlet opening, The vehicle air conditioner according to any one of the first to seventh aspects, wherein the conditioned air flowing through the interior air passage is blown out from the blow-out opening through the blow-out duct into the vehicle compartment. [Ninth viewpoint] The vehicle air conditioner according to an eighth aspect, wherein the outlet duct is provided with a plurality of grilles (24, 25, 26) capable of adjusting the direction and volume of the conditioned air that is blown out. [10th viewpoint] The vehicle air conditioning device according to any one of the first to ninth aspects, wherein the electric motor is a dual-shaft electric motor (151) that simultaneously operates the inside air blower fan and the outside air blower fan, and the inside air blower fan, the outside air blower fan, and the dual-shaft electric motor have respective rotational axes (CL) that coincide with each other. [Eleventh viewpoint] A motor drive circuit board (152) for driving the electric motor is further provided, The vehicle air conditioner according to any one of the first to tenth aspects, wherein the motor drive circuit board is provided in the inside air passage. [12th viewpoint] The vehicle air conditioner according to any one of the first to eleventh aspects, wherein, when mounted on the vehicle, the compressor is disposed below the inside air blower fan and the outside air blower fan in a direction of gravity. [13th viewpoint] The compressor is an electric compressor having an electric motor (40) and a refrigerant compression section (41), The compressor further includes an inverter (42) for supplying power to the electric motor of the compressor, The vehicle air conditioner according to any one of the first to twelfth aspects, wherein, when mounted on the vehicle, the inverter is disposed inside the air conditioning case and on an outer side of the vehicle compartment with respect to the compressor. [14th viewpoint] The vehicle air conditioning device according to any one of the first to thirteenth aspects, wherein, when mounted on a vehicle, the compressor is positioned so that a rotational axis (CL_comp) of the electric motor intersects with rotational axes of the inside air blower fan, the outside air blower fan, and the electric motor. [15th viewpoint] a gas-liquid separator (36) that separates the refrigerant flowing out from the upstream tube of the condenser into a gas phase refrigerant and a liquid phase refrigerant and stores the refrigerant, and flows only the liquid phase refrigerant into the downstream tube of the condenser, The vehicle air conditioner according to any one of the first to fourteenth aspects, wherein the gas-liquid separator is disposed on an opposite side of the condenser from the outside air blower fan. [Explanation of symbols]

[0076] 1: vehicle air conditioning device, 3: vehicle interior, 10: air conditioning case, 13: inside air blower fan, 14: outside air blower fan, 15: electric motor, 19: inside air intake port, 20: outlet opening, 21: outside air intake port, 22: exhaust port, 23: inside air passage, 27: outside air passage, 31: evaporator, 35: condenser, 37: compressor, 38: expansion valve, 39: refrigerant piping.

Claims

1. In a vehicle air conditioner mounted on a vehicle, an air conditioning case (10) that can be attached to a vehicle interior (3); an inside air intake port (19) provided in the air conditioning case for drawing in air from inside the vehicle compartment; a blow-out opening (20) provided in the air conditioning case for blowing air into the vehicle interior; an outside air intake port (21) provided in the air conditioning case for drawing in air outside the vehicle compartment; an exhaust port (22) provided in the air conditioning case for discharging air to the outside of the vehicle compartment; an inside air passage (23) for allowing air drawn in from the inside air intake port to flow to the outlet opening; an outside air passage (27) for allowing air drawn in from the outside air intake port to flow to the exhaust port; an inside air blower fan (13) provided midway through the inside air passage; an outside air blower fan (14) provided in the middle of the outside air passage; an electric motor (15) for driving the inside air blower fan and the outside air blower fan; a compressor (37) that draws in, compresses, and discharges a refrigerant; a condenser (35) that condenses the refrigerant discharged from the compressor by heat exchange with air flowing through the outside air passage; an expansion valve (38) for reducing the pressure and expanding the refrigerant flowing out from the condenser; an evaporator (31) that evaporates the refrigerant flowing out from the expansion valve by heat exchange with air flowing through the inside air passage; a refrigerant pipe (39) connecting a refrigerant discharge port of the compressor, the condenser, the expansion valve, the evaporator, and a refrigerant suction port of the compressor in this order; Within the air conditioning case, the inside air passage and the outside air passage are arranged to overlap in the vehicle up-down direction when the air conditioning case is installed in the vehicle, and the inside air blower fan, the outside air blower fan, the compressor, the condenser, and the evaporator are arranged so as not to overlap in the thickness direction of the air conditioning case, When the width direction of the air conditioning case is defined as a direction perpendicular to the vertical direction of the vehicle when the air conditioning case is installed in the vehicle and perpendicular to the thickness direction of the air conditioning case, the inside air intake port and the inside air blower fan are provided at a position on one side of the center of the air conditioning case in a width direction, the air outlet opening is provided at a position on the other side in the width direction from the center of the air conditioning case, The vehicle air conditioner, wherein the downstream side inside air passage (232) of the inside air passage extends in the width direction of the air conditioning case from the inside air blower fan to the blow-out opening.

2. A vehicle air conditioning system mounted on a vehicle, an air conditioning case (10) that can be attached to a vehicle interior (3); an inside air intake port (19) provided in the air conditioning case for drawing in air from inside the vehicle compartment; a blow-out opening (20) provided in the air conditioning case for blowing air into the vehicle interior; an outside air intake port (21) provided in the air conditioning case for drawing in air outside the vehicle compartment; an exhaust port (22) provided in the air conditioning case for discharging air to the outside of the vehicle compartment; an inside air passage (23) for allowing air drawn in from the inside air intake port to flow to the outlet opening; an outside air passage (27) for allowing air drawn in from the outside air intake port to flow to the exhaust port; an inside air blower fan (13) provided midway through the inside air passage; an outside air blower fan (14) provided in the middle of the outside air passage; an electric motor (15) for driving the inside air blower fan and the outside air blower fan; a compressor (37) that draws in, compresses, and discharges a refrigerant; a condenser (35) that condenses the refrigerant discharged from the compressor by heat exchange with air flowing through the outside air passage; an expansion valve (38) for reducing the pressure and expanding the refrigerant flowing out from the condenser; an evaporator (31) that evaporates the refrigerant flowing out from the expansion valve by heat exchange with air flowing through the inside air passage; a refrigerant pipe (39) connecting a refrigerant discharge port of the compressor, the condenser, the expansion valve, the evaporator, and a refrigerant suction port of the compressor in this order; Within the air conditioning case, the inside air passage and the outside air passage are arranged to overlap in the vehicle up-down direction when the air conditioning case is installed in the vehicle, and the inside air blower fan, the outside air blower fan, the compressor, the condenser, and the evaporator are arranged so as not to overlap in the thickness direction of the air conditioning case, the outside air intake port is provided at a position on the other side in a width direction of the air conditioning case from the center, The exhaust port is also provided at a position on the other side in the width direction from the center of the air conditioning case, the outside air blower fan is provided at a position on one side of the center of the air conditioning case in a width direction, the outside air passage has an upstream outside air passage (271) that communicates the outside air intake port with the suction portion of the outside air blower fan, and a downstream outside air passage (272) that communicates the blowing portion of the outside air blower fan with the exhaust port, the condenser is provided in the downstream outside air passage, At least a portion of the downstream outside air passage is disposed outside the passenger compartment relative to the upstream outside air passage when the air conditioner is mounted on the vehicle.

3. The condenser is a fin-and-tube heat exchanger having a tube through which a refrigerant flows and a plurality of fins connected to the outer wall of the tube, 3. The vehicle air conditioning system according to claim 2, wherein the condenser is disposed at an angle with respect to a flow path center of the downstream outside air passage when viewed from the top-bottom direction of the vehicle, and an end (351) of the condenser on the outside air blower fan side is disposed outside the vehicle compartment when mounted on the vehicle, and an end (352) of the condenser opposite to the outside air blower fan is disposed inside the vehicle compartment when mounted on the vehicle.

4. An inside air intake port (46) for ventilation provided in the air conditioning case and for allowing air in the vehicle cabin to flow into the upstream outside air passage; 3. The vehicle air conditioning system according to claim 2, further comprising a ventilation door (47) that switches between communication between the ventilation inside air intake port and the upstream outside air passage and between communication between the outside air intake port and the upstream outside air passage.

5. A vehicle air conditioning system mounted on a vehicle, an air conditioning case (10) that can be attached to a vehicle interior (3); an inside air intake port (19) provided in the air conditioning case for drawing in air from inside the vehicle compartment; a blow-out opening (20) provided in the air conditioning case for blowing air into the vehicle interior; an outside air intake port (21) provided in the air conditioning case for drawing in air outside the vehicle compartment; an exhaust port (22) provided in the air conditioning case for discharging air to the outside of the vehicle compartment; an inside air passage (23) for allowing air drawn in from the inside air intake port to flow to the outlet opening; an outside air passage (27) for allowing air drawn in from the outside air intake port to flow to the exhaust port; an inside air blower fan (13) provided midway through the inside air passage; an outside air blower fan (14) provided in the middle of the outside air passage; an electric motor (15) for driving the inside air blower fan and the outside air blower fan; a compressor (37) that draws in, compresses, and discharges a refrigerant; a condenser (35) that condenses the refrigerant discharged from the compressor by heat exchange with air flowing through the outside air passage; an expansion valve (38) for reducing the pressure and expanding the refrigerant flowing out from the condenser; an evaporator (31) that evaporates the refrigerant flowing out from the expansion valve by heat exchange with air flowing through the inside air passage; a refrigerant pipe (39) connecting a refrigerant discharge port of the compressor, the condenser, the expansion valve, the evaporator, and a refrigerant suction port of the compressor in this order; Within the air conditioning case, the inside air passage and the outside air passage are arranged to overlap in the vehicle up-down direction when the air conditioning case is installed in the vehicle, and the inside air blower fan, the outside air blower fan, the compressor, the condenser, and the evaporator are arranged so as not to overlap in the thickness direction of the air conditioning case, When mounted on a vehicle, the air conditioning case can be attached to a position on the right or left side of the center of a rear window (4) of the vehicle in a vehicle width direction.

6. A vehicle air conditioning system mounted on a vehicle, an air conditioning case (10) that can be attached to a vehicle interior (3); an inside air intake port (19) provided in the air conditioning case for drawing in air from inside the vehicle compartment; a blow-out opening (20) provided in the air conditioning case for blowing air into the vehicle interior; an outside air intake port (21) provided in the air conditioning case for drawing in air outside the vehicle compartment; an exhaust port (22) provided in the air conditioning case for discharging air to the outside of the vehicle compartment; an inside air passage (23) for allowing air drawn in from the inside air intake port to flow to the outlet opening; an outside air passage (27) for allowing air drawn in from the outside air intake port to flow to the exhaust port; an inside air blower fan (13) provided midway through the inside air passage; an outside air blower fan (14) provided in the middle of the outside air passage; an electric motor (15) for driving the inside air blower fan and the outside air blower fan; a compressor (37) that draws in, compresses, and discharges a refrigerant; a condenser (35) that condenses the refrigerant discharged from the compressor by heat exchange with air flowing through the outside air passage; an expansion valve (38) for reducing the pressure and expanding the refrigerant flowing out from the condenser; an evaporator (31) that evaporates the refrigerant flowing out from the expansion valve by heat exchange with air flowing through the inside air passage; a refrigerant pipe (39) connecting a refrigerant discharge port of the compressor, the condenser, the expansion valve, the evaporator, and a refrigerant suction port of the compressor in this order; Within the air conditioning case, the inside air passage and the outside air passage are arranged to overlap in the vehicle up-down direction when the air conditioning case is installed in the vehicle, and the inside air blower fan, the outside air blower fan, the compressor, the condenser, and the evaporator are arranged so as not to overlap in the thickness direction of the air conditioning case, When the air conditioner is mounted on a vehicle, the outside air intake port and the exhaust port protrude from a rear window of the vehicle to the outside of the vehicle compartment.

7. A vehicle air conditioning system mounted on a vehicle, an air conditioning case (10) that can be attached to a vehicle interior (3); an inside air intake port (19) provided in the air conditioning case for drawing in air from inside the vehicle compartment; a blow-out opening (20) provided in the air conditioning case for blowing air into the vehicle interior; an outside air intake port (21) provided in the air conditioning case for drawing in air outside the vehicle compartment; an exhaust port (22) provided in the air conditioning case for discharging air to the outside of the vehicle compartment; an inside air passage (23) for allowing air drawn in from the inside air intake port to flow to the outlet opening; an outside air passage (27) for allowing air drawn in from the outside air intake port to flow to the exhaust port; an inside air blower fan (13) provided midway through the inside air passage; an outside air blower fan (14) provided in the middle of the outside air passage; an electric motor (15) for driving the inside air blower fan and the outside air blower fan; a compressor (37) that draws in, compresses, and discharges a refrigerant; a condenser (35) that condenses the refrigerant discharged from the compressor by heat exchange with air flowing through the outside air passage; an expansion valve (38) for reducing the pressure and expanding the refrigerant flowing out from the condenser; an evaporator (31) that evaporates the refrigerant flowing out from the expansion valve by heat exchange with air flowing through the inside air passage; a refrigerant pipe (39) connecting a refrigerant discharge port of the compressor, the condenser, the expansion valve, the evaporator, and a refrigerant suction port of the compressor in this order; Within the air conditioning case, the inside air passage and the outside air passage are arranged to overlap in the vehicle up-down direction when the air conditioning case is installed in the vehicle, and the inside air blower fan, the outside air blower fan, the compressor, the condenser, and the evaporator are arranged so as not to overlap in the thickness direction of the air conditioning case, Further provided is a blow-out duct (12) connected to the blow-out opening, The conditioned air flowing through the interior air passage is blown out from the outlet opening into the vehicle compartment via the outlet duct.

8. An air conditioning system for a vehicle as described in Claim 7, wherein the outlet duct is provided with a plurality of grilles (24, 25, 26) that can adjust the direction and volume of the air-conditioned air being blown out.

9. A vehicle air conditioning system mounted on a vehicle, an air conditioning case (10) that can be attached to a vehicle interior (3); an inside air intake port (19) provided in the air conditioning case for drawing in air from inside the vehicle compartment; a blow-out opening (20) provided in the air conditioning case for blowing air into the vehicle interior; an outside air intake port (21) provided in the air conditioning case for drawing in air outside the vehicle compartment; an exhaust port (22) provided in the air conditioning case for discharging air to the outside of the vehicle compartment; an inside air passage (23) for allowing air drawn in from the inside air intake port to flow to the outlet opening; an outside air passage (27) for allowing air drawn in from the outside air intake port to flow to the exhaust port; an inside air blower fan (13) provided midway through the inside air passage; an outside air blower fan (14) provided in the middle of the outside air passage; an electric motor (15) for driving the inside air blower fan and the outside air blower fan; a compressor (37) that draws in, compresses, and discharges a refrigerant; a condenser (35) that condenses the refrigerant discharged from the compressor by heat exchange with air flowing through the outside air passage; an expansion valve (38) for reducing the pressure and expanding the refrigerant flowing out from the condenser; an evaporator (31) that evaporates the refrigerant flowing out from the expansion valve by heat exchange with air flowing through the inside air passage; a refrigerant pipe (39) connecting a refrigerant discharge port of the compressor, the condenser, the expansion valve, the evaporator, and a refrigerant suction port of the compressor in this order; Within the air conditioning case, the inside air passage and the outside air passage are arranged to overlap in the vehicle up-down direction when the air conditioning case is installed in the vehicle, and the inside air blower fan, the outside air blower fan, the compressor, the condenser, and the evaporator are arranged so as not to overlap in the thickness direction of the air conditioning case, The electric motor is a dual-shaft electric motor (151) that simultaneously operates the inside air blower fan and the outside air blower fan, and the inside air blower fan, the outside air blower fan, and the dual-shaft electric motor have the same rotation axis (CL).

10. A vehicle air conditioning system mounted on a vehicle, an air conditioning case (10) that can be attached to a vehicle interior (3); an inside air intake port (19) provided in the air conditioning case for drawing in air from inside the vehicle compartment; a blow-out opening (20) provided in the air conditioning case for blowing air into the vehicle interior; an outside air intake port (21) provided in the air conditioning case for drawing in air outside the vehicle compartment; an exhaust port (22) provided in the air conditioning case for discharging air to the outside of the vehicle compartment; an inside air passage (23) for allowing air drawn in from the inside air intake port to flow to the outlet opening; an outside air passage (27) for allowing air drawn in from the outside air intake port to flow to the exhaust port; an inside air blower fan (13) provided midway through the inside air passage; an outside air blower fan (14) provided in the middle of the outside air passage; an electric motor (15) for driving the inside air blower fan and the outside air blower fan; a compressor (37) that draws in, compresses, and discharges a refrigerant; a condenser (35) that condenses the refrigerant discharged from the compressor by heat exchange with air flowing through the outside air passage; an expansion valve (38) for reducing the pressure and expanding the refrigerant flowing out from the condenser; an evaporator (31) that evaporates the refrigerant flowing out from the expansion valve by heat exchange with air flowing through the inside air passage; a refrigerant pipe (39) connecting a refrigerant discharge port of the compressor, the condenser, the expansion valve, the evaporator, and a refrigerant suction port of the compressor in this order; Within the air conditioning case, the inside air passage and the outside air passage are arranged to overlap in the vehicle up-down direction when the air conditioning case is installed in the vehicle, and the inside air blower fan, the outside air blower fan, the compressor, the condenser, and the evaporator are arranged so as not to overlap in the thickness direction of the air conditioning case, Further provided is a motor drive circuit board (152) that drives the electric motor, The motor drive circuit board is provided in the inside air passage.

11. A vehicle air conditioning system mounted on a vehicle, an air conditioning case (10) that can be attached to a vehicle interior (3); an inside air intake port (19) provided in the air conditioning case for drawing in air from inside the vehicle compartment; a blow-out opening (20) provided in the air conditioning case for blowing air into the vehicle interior; an outside air intake port (21) provided in the air conditioning case for drawing in air outside the vehicle compartment; an exhaust port (22) provided in the air conditioning case for discharging air to the outside of the vehicle compartment; an inside air passage (23) for allowing air drawn in from the inside air intake port to flow to the outlet opening; an outside air passage (27) for allowing air drawn in from the outside air intake port to flow to the exhaust port; an inside air blower fan (13) provided midway through the inside air passage; an outside air blower fan (14) provided in the middle of the outside air passage; an electric motor (15) for driving the inside air blower fan and the outside air blower fan; a compressor (37) that draws in, compresses, and discharges a refrigerant; a condenser (35) that condenses the refrigerant discharged from the compressor by heat exchange with air flowing through the outside air passage; an expansion valve (38) for reducing the pressure and expanding the refrigerant flowing out from the condenser; an evaporator (31) that evaporates the refrigerant flowing out from the expansion valve by heat exchange with air flowing through the inside air passage; a refrigerant pipe (39) connecting a refrigerant discharge port of the compressor, the condenser, the expansion valve, the evaporator, and a refrigerant suction port of the compressor in this order; Within the air conditioning case, the inside air passage and the outside air passage are arranged to overlap in the vehicle up-down direction when the air conditioning case is installed in the vehicle, and the inside air blower fan, the outside air blower fan, the compressor, the condenser, and the evaporator are arranged so as not to overlap in the thickness direction of the air conditioning case, The compressor is an electric compressor having an electric motor (40) and a refrigerant compression section (41), The compressor further includes an inverter (42) that supplies power to the electric motor of the compressor. When mounted on a vehicle, the inverter is disposed inside the air conditioning case and on the outer side of the vehicle compartment relative to the compressor.

12. A vehicle air conditioning system mounted on a vehicle, an air conditioning case (10) that can be attached to a vehicle interior (3); an inside air intake port (19) provided in the air conditioning case for drawing in air from inside the vehicle compartment; a blow-out opening (20) provided in the air conditioning case for blowing air into the vehicle interior; an outside air intake port (21) provided in the air conditioning case for drawing in air outside the vehicle compartment; an exhaust port (22) provided in the air conditioning case for discharging air to the outside of the vehicle compartment; an inside air passage (23) for allowing air drawn in from the inside air intake port to flow to the outlet opening; an outside air passage (27) for allowing air drawn in from the outside air intake port to flow to the exhaust port; an inside air blower fan (13) provided midway through the inside air passage; an outside air blower fan (14) provided in the middle of the outside air passage; an electric motor (15) for driving the inside air blower fan and the outside air blower fan; a compressor (37) that draws in, compresses, and discharges a refrigerant; a condenser (35) that condenses the refrigerant discharged from the compressor by heat exchange with air flowing through the outside air passage; an expansion valve (38) for reducing the pressure and expanding the refrigerant flowing out from the condenser; an evaporator (31) that evaporates the refrigerant flowing out from the expansion valve by heat exchange with air flowing through the inside air passage; a refrigerant pipe (39) connecting a refrigerant discharge port of the compressor, the condenser, the expansion valve, the evaporator, and a refrigerant suction port of the compressor in this order; Within the air conditioning case, the inside air passage and the outside air passage are arranged to overlap in the vehicle up-down direction when the air conditioning case is installed in the vehicle, and the inside air blower fan, the outside air blower fan, the compressor, the condenser, and the evaporator are arranged so as not to overlap in the thickness direction of the air conditioning case, When mounted on a vehicle, the compressor is disposed so that a rotational axis (CL_comp) of the electric motor intersects with rotational axes of the inside air blower fan, the outside air blower fan, and the electric motor.

13. A vehicle air conditioning system mounted on a vehicle, an air conditioning case (10) that can be attached to a vehicle interior (3); an inside air intake port (19) provided in the air conditioning case for drawing in air from inside the vehicle compartment; a blow-out opening (20) provided in the air conditioning case for blowing air into the vehicle interior; an outside air intake port (21) provided in the air conditioning case for drawing in air outside the vehicle compartment; an exhaust port (22) provided in the air conditioning case for discharging air to the outside of the vehicle compartment; an inside air passage (23) for allowing air drawn in from the inside air intake port to flow to the outlet opening; an outside air passage (27) for allowing air drawn in from the outside air intake port to flow to the exhaust port; an inside air blower fan (13) provided midway through the inside air passage; an outside air blower fan (14) provided in the middle of the outside air passage; an electric motor (15) for driving the inside air blower fan and the outside air blower fan; a compressor (37) that draws in, compresses, and discharges a refrigerant; a condenser (35) that condenses the refrigerant discharged from the compressor by heat exchange with air flowing through the outside air passage; an expansion valve (38) for reducing the pressure and expanding the refrigerant flowing out from the condenser; an evaporator (31) that evaporates the refrigerant flowing out from the expansion valve by heat exchange with air flowing through the inside air passage; a refrigerant pipe (39) connecting a refrigerant discharge port of the compressor, the condenser, the expansion valve, the evaporator, and a refrigerant suction port of the compressor in this order; Within the air conditioning case, the inside air passage and the outside air passage are arranged to overlap in the vehicle up-down direction when the air conditioning case is installed in the vehicle, and the inside air blower fan, the outside air blower fan, the compressor, the condenser, and the evaporator are arranged so as not to overlap in the thickness direction of the air conditioning case, The refrigerant circulation system further includes a gas-liquid separator (36) that separates the refrigerant flowing out of the upstream tube of the condenser into a gas phase refrigerant and a liquid phase refrigerant and stores the separated refrigerant, and flows only the liquid phase refrigerant into the downstream tube of the condenser, The gas-liquid separator is disposed on an opposite side of the condenser from the outside air blower fan.

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