JP2010030408A - Arrangement structure of air conditioning device for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an arrangement structure of an air conditioning device for a vehicle in which a heat exchanger for evaporation is arranged outside a cabin (within an engine room), and residential space within the cabin is maximumly ensured, while considering safety of coolant not leaking into the cabin during vehicle impact. <P>SOLUTION: A dash panel 13 for partitioning the interior and the engine room 11 in a longitudinal direction of the vehicle is disposed. The heat exchanger for heat dissipation 2 is arranged in front of a powertrain 40 disposed in the engine room 11. The heat exchanger for evaporation 4 is arranged in front of the dash panel 13C on one side of the powertrain 40 in a vehicle width direction. An air-conditioning wind passage for admitting air-conditioning wind passing through the heat exchanger for evaporation 4 into the interior is disposed. An arrangement side 13C of the heat exchanger for evaporation 4 of the dash panel 13 is arranged in an offset manner on the rear side of the vehicle than the other 13B of the dash panel. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  This invention includes a compressor for compressing the refrigerant, a heat-dissipating heat exchanger, and an evaporating heat exchanger in a refrigerant circulation path through which the refrigerant circulates. The present invention relates to an arrangement structure of a vehicle air conditioner having an air conditioner to be adjusted.

  In general, a vehicle air conditioner is formed by a refrigeration cycle having a basic configuration of a compressor that compresses refrigerant, a condenser as a heat exchanger for heat dissipation, an expansion valve, and an evaporator as an evaporating heat exchanger. The refrigerant compressed by the compressor is condensed by the condenser, and after the condensed refrigerant is decompressed and expanded by the expansion valve, it is evaporated by the evaporator and returned to the compressor. An air conditioner that adjusts the temperature in the passenger compartment is formed by the evaporator.

Conventionally, CFC refrigerants and HCFC refrigerants have been used as the above-mentioned refrigerants. However, these refrigerants are harmful to the ozone layer, and are therefore HFC refrigerants (hydro-fluoro-carbon refrigerants) that have zero ozone destruction coefficient. And HC refrigerant (hydrocarbon refrigerant).
The above-mentioned HFC refrigerant (hydro-fluorocarbon refrigerant) has a problem of a large global warming potential, while HC refrigerant (hydrocarbon refrigerant) has a small global warming potential, but has strong flammability, so it is used for vehicles. Is unsuitable. On the other hand, the conventional ammonia refrigerant has a problem of being toxic while having a global warming potential of zero.

For this reason, as disclosed in Patent Documents 1, 2, and 3, an incombustible and non-toxic CO ₂ refrigerant having a minimum global warming potential is used, and an internal heat exchanger and an accumulator are installed in a conventional refrigeration cycle. In addition, a technology for forming a vehicle air conditioner has been developed.

However, each of these Patent Documents 1 to 3 only discloses a basic refrigeration cycle of a vehicle air conditioner using carbon dioxide refrigerant, and the elements constituting the refrigeration cycle are not limited to the vehicle. There is no disclosure about whether to install or place in the system.
Each of the above-described refrigerants may adversely affect the passengers depending on the components, and therefore, it is desirable that the refrigerant be prevented from entering the passenger compartment even during a vehicle collision.
JP 2007-191125 A JP 2006-327350 A JP 2003-214713 A

  Accordingly, the present invention provides a dash panel that partitions the vehicle compartment and the engine room in the vehicle front-rear direction, disposes a heat dissipation heat exchanger in front of the power train unit provided in the engine room, and An evaporating heat exchanger is disposed in front of the dash panel on one side in the width direction, and an conditioned air passage for guiding the conditioned air passing through the evaporating heat exchanger to the vehicle interior is provided. By disposing the installation side offset from the other side of the dash panel to the rear of the vehicle, the evaporating heat exchanger is installed outside the vehicle compartment while taking into account safety so that the refrigerant does not leak into the vehicle compartment in the event of a vehicle collision ( It is an object of the present invention to provide a vehicle air conditioner arrangement structure that can be disposed in the engine room) and that can ensure maximum cabin space.

  The arrangement structure of the vehicle air conditioner according to the present invention includes a compressor for compressing the refrigerant, a heat exchanger for heat dissipation, a heat exchanger for heat dissipation, and a heat exchanger for evaporation in a refrigerant circulation path through which the refrigerant circulates. And a vehicle air conditioner arrangement structure including an air conditioner that adjusts the temperature of the passenger compartment by the evaporating heat exchanger, wherein a dash panel that partitions the passenger compartment and the engine compartment in the vehicle front-rear direction is provided. The heat dissipation heat exchanger is disposed in front of the powertrain unit disposed in the engine room, and the evaporation heat exchange is disposed in front of the dash panel on one side in the vehicle width direction of the powertrain unit. An air conditioning air passage that guides the conditioned air passing through the evaporating heat exchanger into the vehicle interior, and the evaporating heat exchanger side of the dash panel is arranged on the rear side of the vehicle from the other side of the dash panel. Off In which is disposed in Tsu door.

According to the above configuration, in consideration of safety so that the refrigerant does not leak into the passenger compartment in the event of a vehicle collision, the heat dissipation heat exchanger is disposed in front of the powertrain unit in the engine room, and the evaporation heat exchanger is Since the asymmetric dash panel is disposed in front of the vehicle offset to the rear of the vehicle (outside the passenger compartment), the evaporating heat exchanger can be laid out while ensuring the maximum living space in the passenger compartment.
In short, it is possible to achieve both a secure living space in the passenger compartment and the arrangement of an evaporating heat exchanger, and an optimal layout can be achieved by the asymmetric structure of the dash panel. In addition, since the evaporating heat exchanger is disposed outside the vehicle compartment (engine room), safety can be ensured in the event of a collision.

  In one embodiment of the present invention, the dash panel is formed with a tunnel portion recessed in the vehicle interior direction so that the power train unit is disposed at the center thereof, and the passenger seat side from the tunnel portion. The vehicle width direction side of is offset to the rear of the vehicle.

According to the above configuration, the heat exchanger for evaporation is disposed in front of the dash panel on the side of the passenger seat offset to the rear, with the offset side toward the rear of the vehicle being the passenger seat side, the non-offset side being the driver's seat side, is there.
As a result, it is possible to secure a sufficient living space on the driver's seat side and to secure a maximum living space on the passenger seat side.

  In one embodiment of the present invention, a blower unit for blowing conditioned air to the evaporating heat exchanger is provided upstream of the evaporating heat exchanger in the conditioned air passage. It is arranged side by side in the front-rear direction in front of the heat exchanger for use.

According to the above configuration, since the blower unit and the heat exchanger for evaporation are arranged in parallel in the front-rear direction, the following effects are obtained.
That is, a space (excess space) elongated in the vehicle front-rear direction is present on the side of the powertrain unit and in front of the dash panel. Thus, by arranging the blower unit and the evaporation heat exchanger side by side in the front-rear direction, the blower unit and the evaporation heat exchanger are arranged by effectively using this surplus space. Can be laid out compactly.

In one embodiment of the present invention, the conditioned air from the evaporating heat exchanger is provided downstream of the evaporating heat exchanger in the air conditioning passage to a plurality of conditioned air outlets provided in the vehicle interior. An air distribution unit that distributes and distributes air is provided, and the air distribution units are arranged side by side in the vehicle width direction on the side of the center of the evaporating heat exchanger.
According to the above configuration, the evaporating heat exchanger and the air distribution unit are arranged side by side in the vehicle width direction, so that the three including these and the blower unit can be laid out in a compact manner by effectively using the surplus space. can do.

In one embodiment of the present invention, the evaporating heat exchanger, the blower unit, and the air distribution unit are integrated into a unit and disposed in the engine room in front of the dash panel.
According to the above configuration, since the whole unitized unit is located in the engine room as the outside of the passenger compartment, safety in the event of a collision can be ensured, and the whole unitized unitized unit Are integrated and laid out on one side of the dash panel. Therefore, it is possible to reduce the size of the dash panel and improve the assemblability.

In one embodiment of the present invention, the evaporating heat exchanger and the air distribution unit are arranged so as to be substantially V-shaped with the rear side of the vehicle open in plan view.
According to the above configuration, the evaporation heat exchanger and the air distribution unit are arranged in a V shape corresponding to the shape of the front side frame immediately in front of the dash panel, in other words, the shape of the surplus space in plan view. Therefore, it is possible to achieve both the capacity of the evaporating heat exchanger and the space occupied by the air distribution unit while reducing the layout of both.

In one embodiment of the present invention, the refrigerant is a carbon dioxide refrigerant.
According to the above configuration, since the refrigerant is a carbon dioxide refrigerant, the global warming potential is minimal, nontoxic, and nonflammability can be ensured, which is effective in terms of safety.

  According to the present invention, the dash panel that partitions the vehicle compartment and the engine room in the vehicle front-rear direction is provided, and the heat exchanger for heat dissipation is disposed in front of the power train unit disposed in the engine room. An evaporating heat exchanger is disposed in front of the dash panel on one side in the vehicle width direction, and an air conditioned air passage for guiding the conditioned air passing through the evaporating heat exchanger into the vehicle interior is provided. Is disposed offset from the other side of the dash panel to the rear of the vehicle, so that the evaporative heat exchanger can be installed outside the vehicle compartment in consideration of safety so that the refrigerant does not leak into the vehicle compartment in the event of a vehicle collision ( In addition to being disposed in the engine room, there is an effect that the living space in the vehicle compartment can be secured to the maximum.

  A compressor that compresses the refrigerant in a refrigerant circulation path through which the refrigerant circulates for the purpose of ensuring safety in the event of a vehicle collision, ensuring a living space in the passenger compartment, and disposing a heat exchanger for evaporation. And a heat exchanger for heat dissipation, and a heat exchanger for evaporation, and an arrangement structure of a vehicle air conditioner that includes an air conditioner that adjusts the temperature of the vehicle interior by the heat exchanger for evaporation. A dash panel is provided for partitioning the engine room in the vehicle longitudinal direction, the heat-dissipating heat exchanger is disposed in front of the power train unit disposed in the engine room, and one side in the vehicle width direction of the power train unit is disposed. The evaporating heat exchanger is disposed in front of the dash panel, an conditioned air passage for guiding the conditioned air passing through the evaporating heat exchanger to the vehicle interior is provided, and the evaporating heat exchanger of the dash panel is arranged. The side Offset rearward from the other Sshupaneru are realized by configurations that disposed.

An embodiment of the present invention will be described in detail with reference to the drawings.
The drawing shows the arrangement structure of a vehicle air conditioner. First, the configuration of a refrigeration cycle using CO ₂ (carbon dioxide) as a refrigerant will be described with reference to FIG.

  As shown in FIG. 8, a variable capacity compressor 1 that compresses the refrigerant, and a gas cooler 2 as a heat-dissipating heat exchanger that cools the high-temperature and high-pressure refrigerant compressed by the compressor 1 by outside air, particularly by running air. And an expansion valve 3 as decompression means for decompressing the refrigerant cooled by the gas cooler 2, and an evaporator 4 as an evaporating heat exchanger that removes heat from the inside and outside air to evaporate the refrigerant decompressed by the expansion valve 3. And the internal heat exchanger 5 that exchanges heat between the refrigerant cooled by the gas cooler 2 and the low-pressure refrigerant that recirculates to the compressor 1, and the refrigerant that has passed through the evaporator 4 is gas-liquid separated into a gas-phase refrigerant And an accumulator 6 that sends only the refrigerant to the compressor 1, and these elements 1 to 6 are connected in a closed loop by lines L1 to L7 as refrigerant pipes to constitute a refrigeration cycle, and each of these lines L1 to L7 ( Refrigerant distribution Refrigerant forms a refrigerant circulation path 7 that circulates through).

Here, the above-described compressor 1 is driven by an engine 38 to be described later, compresses the CO ₂ gas refrigerant, and discharges the high-temperature and high-pressure refrigerant to the line L1.
The gas cooler 2 exchanges the heat of the high-temperature and high-pressure CO ₂ refrigerant with the outside air, mainly with the traveling wind, radiates and liquefies it, and cools it to an intermediate temperature.
The internal heat exchanger 5 exchanges heat between the refrigerant cooled by the gas cooler 2 and the low-temperature and low-pressure refrigerant evaporated by the evaporator 4 to further cool the refrigerant sent from the gas cooler 2 to the expansion valve 3.

The expansion valve 3 depressurizes the medium-temperature and high-pressure refrigerant cooled by the internal heat exchanger 5 and sends it to the evaporator 4 as a low-temperature and low-pressure mist refrigerant.
The evaporator 4 removes heat from the inside and outside air passing through the evaporator 4 to evaporate the refrigerant, and the evaporator 4 adjusts the temperature in the vehicle interior.

  The accumulator 6 gas-liquid separates the refrigerant discharged from the evaporator 4, temporarily pools the liquid refrigerant to prevent liquid compression by the compressor 1, and only the gas refrigerant passes through the internal heat exchanger 5. Reflux to 1.

Next, the overall structure of the vehicle will be described with reference to FIGS. 1 is a side view of the vehicle, FIG. 2 is a plan view of the vehicle, and FIG. 3 is a front view of the vehicle.
1 to 3, a dash lower panel 13 is provided as a dash panel that partitions the engine room 11 and the vehicle compartment 12 in the vehicle front-rear direction, and the lower part of the dash lower panel 13 extends substantially horizontally toward the rear. A floor panel 14 that forms the bottom surface of the chamber 12 is integrally or integrally provided, and a kick-up portion 15 that rises upward and a substantially horizontal rear seat pan 16 are formed at the rear of the floor panel 14. A rear floor 18 (floor panel) is connected to the rear seat pan 16 substantially horizontally via a bulkhead 17. The rear floor 18 forms a bottom surface of a rear cargo room 53 described later.

  As shown in FIG. 2, the dash lower panel 13 that partitions the vehicle compartment 12 and the engine compartment 11 in the front-rear direction of the vehicle has a dash central recess 13 </ b> A (car interior) recessed toward the vehicle rear at the center in the vehicle width direction. And a dash side portion 13B, 13C extending from the front end of the dash center concave portion 13A to both sides in the vehicle width direction, and a passenger seat with respect to the dash side portion 13B on the driver's seat side. The side 13C is formed at a position offset by a predetermined amount toward the rear of the vehicle.

  As shown in the plan view of FIG. 2, a tunnel portion 19 that protrudes upward into the passenger compartment 12 and extends in the front-rear direction of the vehicle is provided at the center of the floor panel 14 in the vehicle width direction. . As shown in a side view in FIG. 1, the tunnel portion 19 extends between the dash lower panel 13 and the bulkhead 17 in the vehicle front-rear direction, and the tunnel portion 19 is the center of the vehicle body rigidity. A tunnel member (a so-called high-mount backbone frame) that extends in the front-rear direction of the vehicle along the upper portion of the tunnel portion 19 may be provided on the upper portion of the tunnel portion 19.

  Further, as shown in FIGS. 2 and 3, side sills 20 extending in the front-rear direction of the vehicle are bonded and fixed to the left and right sides of the floor panel 14 described above. The side sill 20 is a vehicle body rigid member having a side sill closed section 23 (see FIG. 3) that joins the side sill inner 21 and the side sill outer 22 and extends in the front-rear direction of the vehicle. A side sill reinforcement is interposed between the side sill inner 21 and the side sill outer 22 as necessary.

  Further, as shown in FIGS. 1 and 2, in the middle part of the dash lower panel 13 and the kick-up part 15 in the vehicle front-rear direction, the upper part of the floor panel 14 has a vertical wall of the tunnel part 19 and side sill inners 21. Left and right floor cross members 24, 24 are provided to connect the two in the vehicle width direction, and a closed cross section 25 extending in the vehicle width direction is formed between the floor cross member 24 having a hat-shaped cross section and the floor panel 14. ing.

  As shown in FIGS. 2 and 3, a pair of left and right floor frames 26 extending in the front-rear direction of the vehicle are provided at the lower portion of the floor panel 14 at the intermediate portion in the vehicle width direction between the tunnel portion 19 and the side sill 20 described above. , 26 (vehicle body rigid member) are joined and fixed, and a closed cross section 27 (see FIG. 3) extending in the front-rear direction of the vehicle is formed between the floor frame 26 and the floor panel 14 having an inverted cross section hat shape. Yes.

  Further, as shown in FIGS. 1 and 2, a pair of left and right rear side frames 28 and 28 (vehicle body rigid members) extending in the front-rear direction of the vehicle are joined and fixed to both lower sides of the rear floor 18 (reverse cross-section hat). A closed cross section (not shown) extending in the front-rear direction of the vehicle is formed between the rear side frame 28 and the rear floor 18 (in the shape), and the front portions of the pair of rear side frames 28, 28 are shown in FIG. As shown, the front sill 20 extends forward to a position where it overlaps the vehicle longitudinal direction.

  On the other hand, as shown in FIG. 2, a pair of left and right front side frames 29, 29 extending in the front-rear direction of the vehicle are provided on the left and right sides of the engine room 11. Each of these front side frames 29 and 29 is a vehicle body rigid member that extends forward from the dash side portions 13B and 13C, and each of these front side frames 29 and 29 has a rear portion that is a dash lower panel as shown in FIG. 13 extends downward along the front surface, and the rear end of the front side frame 29 is connected to the front end of the floor frame 26. The front side frame 29 and the floor frame 26 are shown in FIG. As described above, it is continuous in a substantially straight line in the front-rear direction of the vehicle in plan view.

1 and 2, a front cross member 30 (so-called No. 1.5 cross member) having a closed sectional structure extending in the vehicle width direction is provided between the pair of left and right front side frames 29, 29. On the other hand, a bumper rain 32 (specifically, a front bumper reinforcement) extending in the vehicle width direction is provided in front of the pair of front side frames 29, 29 via crash cans 31, 31 (impact energy absorbing member). Yes.
In the vehicle width direction intermediate portion of the bumper rain 32, an intermediate retreating portion 32A that retreats backward is formed, and side retreating portions 32B and 32C that retreat backward are formed in both left and right ends of the bumper rain 32, The overall shape seen from the plane of the bumper rain 32 is substantially W-shaped.

  Wheel houses 33, 33 are provided on the vehicle outer side of the pair of left and right front side frames 29, 29 described above. The wheel houses 33, 33 are inside in the vehicle width direction and in the front-rear direction of the wheel house 33. A suspension tower 33T (specifically, a suspension tower) is integrally attached to the substantially central portion.

  Further, as shown in FIG. 4, apron reinforcement 34 as a vehicle body rigid member extending substantially in the front-rear direction of the vehicle is provided at the upper part of the left and right wheel houses 33. A shroud door member (not shown) is connected to the front part, while a cowl side part 35 is connected to the rear part of the apron reinforcement 34.

Incidentally, as shown in FIG. 1, in the vicinity of the front cross member 30 described above, a radiator 37 having a cooling fan 36 at the rear is provided between the pair of left and right front side frames 29, 29 in a front, low, and rear height. Inclined and arranged. Here, the radiator 37 and the cooling fan 36 described above are integrated to constitute a radiator unit. This radiator unit is disposed in front of the engine 38 described below.
As shown in FIGS. 1 and 2, a gas cooler 2 as a heat-dissipating heat exchanger is disposed further forward of the radiator 37, an internal heat exchanger 5 is disposed on the back of the gas cooler 2, and the gas cooler is disposed. The accumulator 6 is arranged upright on either the left or right side immediately after 2.

  As shown in FIGS. 1 and 2, a power train unit 40 (hereinafter simply referred to as an internal combustion engine 38) and a transmission 39 is provided at the rear of the engine room 11 and outside the tunnel portion 19. (Abbreviated as “powertrain”). The power train 40 is disposed corresponding to the above-described dash central recess 13A, and a so-called front side is provided by reversing an engine 38 and a transmission 39 as heavy objects as far as possible in the center in the longitudinal direction of the vehicle.・ Mid-ship engine vehicle, designed to reduce yaw moment of inertia and improve steering stability. Here, a reciprocating engine or a rotary engine can be used as the engine 38 described above.

  Further, a propeller shaft 42 for transmitting the output of the transmission 39 to the rear differential device 41 is provided on the vehicle exterior side of the tunnel portion 19, and the differential output of the rear differential device 41 is extended to the left and right extending in the vehicle width direction. These are configured to transmit to the left and right rear wheels 44, 44 via the drive shafts 43, 43 (see FIG. 2), thereby forming an FR (front engine rear wheel drive) type vehicle.

On the other hand, as shown in FIG. 1, the upper part of the engine room 11 is covered with a hood 45 and the front of the engine room 11 is covered with a front bumper 46.
The front window 47 has a front window opening formed between the left and right front pillars 48, 48 shown in FIG. 3, the front end of the roof portion 49, and the upper end of the cowl portion 50 (see FIGS. 1 and 6). The lower end portion of the front window 47 is supported by a cowl panel 51 constituting the cowl portion 50. The cowl panel 51 is attached to the upper part of the dash lower panel 13 via a dash upper panel 52.

  On the other hand, as shown in FIG. 1, this vehicle is configured so that the opening of the rear luggage compartment 53 above the rear floor 18 is covered with a rear gate 55 (opening / closing member) having a rear gate window 54 so as to be freely opened and closed. The rear luggage compartment 53 communicates with the interior of the passenger compartment 12 and is configured so that the luggage can be easily taken in and out by opening the rear gate 55 described above.

1-3, 56 is a steering wheel, 57 is an instrument panel, 58 is a steering rack, 59 is a sub-frame, 60 is a front wheel tire stored in a wheel house 33 (see FIGS. 2 and 4) in a steerable manner. It is.
On the other hand, as shown in FIG. 2, a driver seat 61 and a passenger seat 62 are juxtaposed side by side in the vehicle width direction inside the passenger compartment 12 behind the dash lower panel 13 and the instrument panel 57. . The driver seat 61 is disposed on the left side of the vehicle corresponding to the left dash side 13B (the other dash side) and the steering wheel 56. The driver seat 61 includes a seat cushion 61C and a seat back 61B. I have.

  The passenger seat 62 is disposed on the right side of the vehicle corresponding to the right dash side 13C (one dash side), and the passenger seat 62 includes a seat cushion 62C and a seat back 62B.

  Left and right rear seats 63 and 63 (rear row seats) having a seat cushion 63C and a seat back 63B are disposed behind the front row seats including the driver seat 61 and the passenger seat 62. Here, each of the seats 61, 62, 63, 63 in the front and rear rows is constituted by a separate seat (bucket seat).

Next, the arrangement structure of the vehicle air conditioner will be described in detail.
As shown in FIG. 2, the compressor 1 driven by the engine 38 is attached to the front of the engine 38, while the front of the power train 40 in the engine room 11, as shown in FIGS. 1 and 2, Specifically, a gas cooler 2 as a heat exchanger for heat dissipation is disposed further in front of the engine 38 and the radiator 37.

Further, an evaporator 4 as a heat exchanger for evaporation is disposed in front of the dash lower panel 13 on one side in the vehicle width direction of the engine 38 constituting the power train 40, that is, in front of the dash side portion 13C.
In this embodiment, the above-described evaporator 4 is disposed in the engine room 11 so as to correspond to the passenger seat 62 and the one dash side portion 13C.

4 is an enlarged plan view of the main part of FIG. 2, FIG. 5 is a plan view showing the internal structure of the air conditioning unit, and FIG. 6 is an enlarged side view of the main part of FIG. The air distribution unit 9 constitutes an air conditioning unit 64, and the evaporator 4, the blower unit 8, and the air distribution unit 9 are integrated into a unit to form an air conditioning unit 64, and the air conditioning unit 64 is connected to the dash lower panel 13. Is disposed in the engine room 11 in front of the dash side portion 13C.
Further, the evaporator 4, the blower unit 8, and the air distribution unit 9 described above are integrated into a single housing 65 as shown in FIG. 5, and the inside of the housing 65 is set as an air conditioning air passage 66. Yes.

The conditioned air passage 66 is a passage that guides the conditioned air passing through the evaporator 4 into the passenger compartment 12 via the air distribution unit 9 (that is, the air distribution box).
Here, the side on which the evaporator 4 is disposed in the above-described dash lower panel 13 is disposed offset from the other side of the dash panel 13 to the rear of the vehicle. In other words, one dash side portion 13C is disposed offset from the other dash side portion 13B toward the rear of the vehicle to form a left-right asymmetric dash lower panel 13.

  As shown in FIG. 4, the dash lower panel 13 has a dash central recess 13A (tunnel) that is recessed in the interior of the vehicle compartment 12 so that the power train 40 is disposed at the center in the vehicle width direction. Part) is formed, and the dash side part 13C is formed by offsetting the side in the vehicle width direction on the passenger seat side from the dash center recess 13A toward the rear of the vehicle.

Further, as shown in FIG. 5, a blower unit 8 that blows conditioned air to the evaporator 4 is provided upstream of the evaporator 4 in the above-described conditioned air passage 66, and this blower unit 8 is located in front of the evaporator 4. Are arranged side by side in the front-rear direction.
The above-described blower unit 8 is a blowing means for blowing conditioned air (inside and outside air) to the evaporator 4 located downstream thereof, and this blower unit 8 includes a discharge portion 8A for conditioned air and a suction port 8B for inside and outside air. And a blower motor 8M. In FIG. 5, a dotted arrow indicates the direction in which the conditioned air flows.

The air distribution unit 9 described above is provided downstream of the evaporator 4 in the air conditioning air passage 66 and distributes the air conditioning air that has passed through the evaporator 4 to the vehicle interior. 9 (so-called air distribution box) is arranged side by side in the vehicle width direction on the side of the evaporator 4 on the vehicle center side.
More specifically, as shown in a plan view in FIG. 5, the evaporator 4 and the air distribution unit 9 are disposed so as to be substantially V-shaped with the rear side of the vehicle open in plan view.

  An intake duct 67 that guides the inside and outside air to the blower unit 8 is provided inside the housing 65 of the air conditioning unit 64 described above. As shown in FIGS. 5 and 6, the intake duct 67 extends obliquely forward and obliquely upward from a duct portion 67 a extending rearward from the suction port 8 </ b> B of the blower unit 8 and a rear portion (upstream portion) of the duct portion 67 a. The duct portion 67b (outside air introduction duct portion) reaching the inside of the cowl portion 50 and the rear portion of the duct portion 67a from the rear portion of the duct portion 67a toward the rear of the extension line of the duct portion 67a. And a duct portion 67c (inside air introduction duct portion) extending in an integrated manner.

Further, in the cowl portion 50 formed above the dash lower panel 13, an outside air introduction port 51 a for introducing outside air is formed in the cowl panel 51, and the duct portion 67 b is formed in the cowl portion 50. An outside air intake port 68 is formed at the upper end of the duct portion 67, and an interior air intake port 69 is formed at the rear end of the duct portion 67c behind the dash side portion 13C.
Further, the above-described intake duct 67 includes an air intake path 70 to the suction port 8B of the blower unit 8 therein.

By the way, as shown in FIG. 4, the defroster communication part 71 and the vent communication part 72 are connected to the downstream part (air blowing side) of the air distribution unit 9.
A defroster duct 74 having a large number of defroster outlets 73, 73... Is connected to the above-described defroster communication portion 71 so as to prevent the front window 47 from being fogged.

The vent communication portion 72 is connected to the vent ducts 75 and 76 on the driver's seat side and the passenger's seat side. The left and right vent outlets 77 and 77 formed in the vent duct 75 on the driver seat side are connected to the driver. The air-conditioning wind is blown out.
Further, the conditioned air is blown out from the left and right vent outlets 78, 78 formed in the vent duct 76 on the passenger seat side toward the passenger. In FIG. 4, reference numerals 79 and 80 denote rear-seat air-conditioning air connection portions, and ducts (not shown) are connected to the connection portions 79 and 80 to form an air-conditioning path for rear-seat passengers. is there.

In short, the above-described air distribution unit 9 distributes the conditioned air from the evaporator 4 to a plurality of conditioned air outlets (see the defroster outlet 73 and the vent outlets 77 and 78) provided in the vehicle interior. This unit distributes air.
On the other hand, as shown in a plan view in FIG. 4, a partition plate 10 is provided between the suspension tower 33 </ b> T and the air conditioning unit 64.

As shown in FIGS. 2, 4, and 7, the partition plate 10 includes a vertical wall portion 10a extending in the vehicle front-rear direction along the side of the power train 40, particularly the engine 38, and a front end of the vertical wall portion 10a. A lateral wall portion 10b that extends further outward in the vehicle width direction and extends to the upper portion of the wheel house 33 in which the front wheel tire 60 (see FIG. 2) is stored, and a joining piece 10c that extends rearward from the vehicle width direction outer end of the lateral wall portion 10b. A joint piece 10d extending rearward from the lower end of the lateral wall portion 10b so as to follow the upper shape of the wheel house 33, and a joint extending inward in the vehicle width direction so as to follow the upper shape of the front side frame 29 from the lower end of the vertical wall portion 10a. A piece 10e and a rear piece 10f extending inward in the vehicle width direction from the rear end of the vertical wall portion 10a are provided, and these elements 10a to 10f are integrally formed.
And as shown in FIG. 4, the above-mentioned joining piece 10e is joined and fixed to the upper part of the front side frame 29 by welding etc., and the intensity | strength improvement of the front side frame 29 is aimed at.

Further, the joining piece 10d is joined and fixed to the upper part of the wheel house 33 and the upper part of the front side frame 29 by welding or the like to improve the strength of the wheel house 33, and the lateral wall part 10b is attached to the rear part of the suspension tower 33T by welding or the like. It is configured to connect and fix to improve the rigidity of the suspension tower 33T, to further improve the rigidity of supporting the front suspension by the suspension tower 33T, and to prevent the suspension tower 33T from falling inward.
Furthermore, the joining piece 10c is joined and fixed to the inner side in the vehicle width direction of the apron reinforcement 34 as a vehicle body strength member by welding or the like, thereby improving the strength of the apron reinforcement 34 and the partition plate 10 itself. It is configured to achieve both improved support rigidity.

The partition plate 10 described above is connected and fixed to the apron reinforcement 34 as the vehicle body rigid member and the front side frame 29, and the joining piece 10d is joined to the wheel house 33. The support strength of the lateral wall portion 10b is improved, and the lateral wall portion 10b having a high support strength is connected and fixed to the suspension tower 33T to prevent the suspension tower 33T from falling down more reliably.
In the figure, arrow F indicates the front of the vehicle, arrow R indicates the rear of the vehicle, arrow IN indicates the inside of the vehicle, and arrow OUT indicates the outside of the vehicle.

  Thus, the arrangement structure of the vehicle air conditioner according to the embodiment has the refrigerant circulation path 7 through which the refrigerant circulates, the compressor 1 that compresses the refrigerant, the heat exchanger for heat dissipation (see the gas cooler 2), and the evaporation. A vehicle air conditioner including an air conditioner (see an air conditioning unit 64) that adjusts the temperature in the passenger compartment 12 by the evaporating heat exchanger (see the evaporator 4). A dash lower panel 13 for partitioning the vehicle compartment 12 and the engine room 11 in the vehicle front-rear direction is provided, and the heat dissipating heat exchanger (gas cooler) is disposed in front of the power train 40 provided in the engine room 11. 2) and the evaporating heat exchanger (see the evaporator 4) in front of the dash lower panel 13 on one side in the vehicle width direction of the power train 40, An air conditioning air passage 66 for guiding the conditioned air passing through the heat generating heat exchanger (see the evaporator 4) into the vehicle compartment 12 is provided, and the evaporating heat exchanger (see the evaporator 4) on the dash lower panel 13 is disposed (one side). Of the dash side panel 13C) is offset from the other side of the dash lower panel 13 (see the other dash side portion 13B) (see FIGS. 1, 2, 6, and 8).

  According to this configuration, the heat exchanger for heat dissipation (gas cooler 2) is disposed in front of the power train 40 in the engine room 11 in consideration of safety so that the refrigerant does not leak into the passenger compartment 12 at the time of a vehicle collision. Since the evaporating heat exchanger (see evaporator 4) is arranged in front of the side of the asymmetric dash lower panel 13 that is offset to the rear of the vehicle (outside the passenger compartment), the evaporation space can be secured while maximizing the living space in the passenger compartment. A heat exchanger (see evaporator 4) can be laid out.

  In short, it is possible to achieve both a living space in the passenger compartment 12 and the arrangement of an evaporating heat exchanger (see the evaporator 4), and an optimal layout is possible due to the asymmetric structure of the dash lower panel 13 It can be. Moreover, since the evaporating heat exchanger (see the evaporator 4) is disposed outside the vehicle compartment (see the engine room 11), it is possible to ensure safety during a collision.

  The dash lower panel 13 is formed with a tunnel portion (see a dash center recess portion 13A) that is recessed in the vehicle interior direction so that the power train 40 is disposed at the center portion. The vehicle width direction side on the passenger seat side is offset from the recess 13A) toward the rear of the vehicle (see FIG. 2).

According to this configuration, the offset side to the rear of the vehicle is the passenger seat side, the non-offset side is the driver's seat side, and the dash lower panel 13 on the front passenger seat side offset to the rear is an evaporative heat exchanger (see the evaporator 4). Is disposed.
As a result, it is possible to secure a sufficient living space on the driver's seat side and to secure a maximum living space on the passenger seat side.

  Furthermore, a blower unit 8 for blowing conditioned air to the evaporating heat exchanger (see the evaporator 4) is provided upstream of the evaporating heat exchanger (see the evaporator 4) in the conditioned air passage 66, and the blower The unit 8 is arranged in the front-rear direction in front of the evaporation heat exchanger (see the evaporator 4) (see FIG. 5).

According to this configuration, since the blower unit 8 and the evaporation heat exchanger (see the evaporator 4) are arranged in the front-rear direction, the following effects are obtained.
That is, a space (excess space) elongated in the vehicle front-rear direction is present on the side of the power train 40, particularly on the side of the engine 38 and in front of the dash lower panel 13. Therefore, by arranging the blower unit 8 and the evaporation heat exchanger (see the evaporator 4) side by side in the front-rear direction, this excess space can be used effectively to make the blower unit 8 and the evaporation heat exchanger ( The evaporator 4 (see FIG. 4) is disposed, and both of these can be laid out in a compact layout.

In addition, the conditioned air from the evaporating heat exchanger (see the evaporator 4) is provided in the vehicle compartment 12 downstream of the evaporating heat exchanger (see the evaporator 4) in the air conditioning passage 66. An air distribution unit 9 that distributes and distributes air to a plurality of air-conditioning air outlets (see defroster outlet 73 and vent outlets 77 and 78) is provided, and the air distribution unit 9 includes the evaporation heat exchanger (evaporator). 4) is arranged side by side in the vehicle width direction on the side of the vehicle center side (see FIGS. 4 and 5).
According to this configuration, the evaporating heat exchanger (see the evaporator 4) and the air distribution unit 9 are arranged side by side in the vehicle width direction. Therefore, the three parties 4, 8 and 9 including both of them 4 and 9 and the blower unit are arranged. Can be laid out compactly by effectively using the surplus space.

Further, the evaporating heat exchanger (see the evaporator 4), the blower unit 8 and the air distribution unit 9 are integrated into a unit (see the air conditioning unit 64), and the interior of the engine room 11 in front of the dash lower panel 13 is provided. (See FIG. 2).
According to this configuration, the whole unitized unit (the entire air conditioning unit 64) is located in the engine room 11 as the outside of the passenger compartment, so that safety at the time of collision can be ensured, Since the whole unitized unit is aggregated and laid out on one side of the dash lower panel 13 (see one dash side portion 13C), it is possible to reduce the size and improve the assemblability. be able to.

Further, the evaporating heat exchanger (see the evaporator 4) and the air distribution unit 9 are arranged so as to be substantially V-shaped with the rear side of the vehicle open in plan view (FIGS. 2 and 5). reference).
According to this configuration, the evaporating heat exchanger (evaporator 4) and the air distribution unit 9 described above correspond to the shape of the front side frame 29 in the front portion of the dash lower panel 13, in other words, the shape of the surplus space in plan view. Are arranged in a V-shape so that the capacity of the evaporating heat exchanger (see the evaporator 4) can be secured (that is, air conditioning performance can be secured) It is possible to achieve both the occupation space securing of the unit 9.

Furthermore, the refrigerant is a carbon dioxide refrigerant (CO ₂ refrigerant) (see FIG. 8).
According to this configuration, since the refrigerant is a carbon dioxide refrigerant, the global warming potential is minimal, nontoxic, and nonflammability can be ensured, which is effective in terms of safety.

In the correspondence between the configuration of the present invention and the above-described embodiment,
The heat dissipation heat exchanger of the present invention corresponds to the gas cooler 2 of the embodiment,
Similarly,
The evaporating heat exchanger corresponds to the evaporator 4,
The dash panel corresponds to the dash lower panel 13,
The dash panel on one side in the vehicle width direction corresponds to the dash side portion 13C,
The tunnel portion corresponds to the dash center recess 13A,
The powertrain unit is compatible with the powertrain 40,
The air conditioner corresponds to the air conditioning unit 64,
Air-conditioning air outlets correspond to the defroster outlet 73 and the vent outlets 77 and 78,
The present invention is not limited to the configuration of the above-described embodiment.
For example, in the above embodiment, the arrangement structure of the vehicle air conditioner is applied to the left-hand drive vehicle, but this may be applied to the right-hand drive vehicle.

The side view which shows the arrangement | positioning structure of the vehicle air conditioner of this invention The top view which shows the arrangement | positioning structure of a vehicle air conditioner Front view showing arrangement structure of vehicle air conditioner The main part enlarged plan view of FIG. Plan view showing the internal structure of the air conditioning unit 1 is an enlarged side view of the main part of FIG. Perspective view of partition plate Configuration diagram of refrigeration cycle using CO ₂ refrigerant

Explanation of symbols

1 ... Compressor 2 ... Gas cooler (heat exchanger for heat dissipation)
4 ... Evaporator (heat exchanger for evaporation)
7 ... Refrigerant circulation path 8 ... Blower unit 9 ... Air distribution unit 11 ... Engine room 12 ... Vehicle compartment 13 ... Dash lower panel (dash panel)
13A ... Dash central recess (tunnel)
13C ... Dash side 40 ... Powertrain (Powertrain unit)
64 ... Air conditioning unit (air conditioner)
66 ... Air-conditioning air passage 73 ... Defroster outlet (air-conditioning outlet)
77, 78 ... Vent outlet (air-conditioning outlet)

Claims (7)

The refrigerant circulation path through which the refrigerant circulates includes a compressor that compresses the refrigerant, a heat exchanger for heat dissipation, and a heat exchanger for evaporation.
An arrangement structure of a vehicle air conditioner provided with an air conditioner that adjusts the temperature in the passenger compartment by the evaporation heat exchanger,
A dash panel is provided to partition the vehicle compartment and engine room in the vehicle longitudinal direction.
While disposing the heat dissipating heat exchanger in front of the powertrain unit disposed in the engine room,
The heat exchanger for evaporation is disposed in front of the dash panel on one side in the vehicle width direction of the power train unit,
An air-conditioning air passage for guiding the air-conditioning air passing through the heat exchanger for evaporation into the passenger compartment;
An arrangement structure of a vehicle air conditioner in which the evaporating heat exchanger side of the dash panel is offset from the other side of the dash panel to the rear of the vehicle. The dash panel is formed with a tunnel portion recessed in the vehicle interior direction so that the power train unit is disposed at the center thereof,
2. The vehicle air conditioner arrangement structure according to claim 1, wherein a side of the passenger seat side in the vehicle width direction is offset rearward of the vehicle from the tunnel portion. A blower unit for blowing conditioned air to the evaporating heat exchanger is provided upstream of the evaporating heat exchanger in the conditioned air passage,
The vehicle air conditioner arrangement structure according to claim 1 or 2, wherein the blower unit is arranged in front and rear in front of the evaporation heat exchanger. An air distribution unit that distributes air by distributing the conditioned air from the evaporating heat exchanger to a plurality of air conditioned air outlets provided in the vehicle compartment, downstream of the evaporating heat exchanger in the air conditioning passage. Is provided,
The arrangement structure of the vehicle air conditioner according to any one of claims 1 to 3, wherein the air distribution unit is arranged side by side in the vehicle width direction on the side of the evaporation heat exchanger on the vehicle center side. . The arrangement of the vehicle air conditioner according to claim 3 or 4, wherein the evaporating heat exchanger, the blower unit, and the air distribution unit are integrated into a unit and disposed in an engine room in front of the dash panel. Construction. The vehicle air conditioner according to any one of claims 3 to 5, wherein the evaporating heat exchanger and the air distribution unit are disposed so as to be substantially V-shaped with a rear side of the vehicle open in a plan view. Arrangement structure. The arrangement structure of a vehicle air conditioner according to any one of claims 1 to 6, wherein the refrigerant is a carbon dioxide refrigerant.

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