JP2010058529A - Arrangement structure of air conditioner for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an arrangement structure of an air conditioner for a vehicle absorbing impact load by a coolant conduit positioned at a front lower side of a heat release heat exchanger when a bumper member receives impact by collision of the vehicle. <P>SOLUTION: A dash panel 13 for partitioning a cabin 12 and an engine room 11 in a vehicle longitudinal direction is provided, and the heat release heat exchanger 2 is arranged at a front side of a power train 40 arranged in the engine room 11. The evaporation heat exchanger 4 is arranged near the dash panel 13, and the heat release heat exchanger 2 and the evaporation heat exchanger 4 are connected by the coolant conduit L6 for forming a coolant circulation route and leading the coolant. The coolant conduit L6 is arranged at a front lower side of the heat release heat exchanger 2 over in a vehicle width direction, and the coolant conduit L6 is covered by the bumper member 46 provided on a front end part of the vehicle. <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 ( Technology has been developed to add an accumulator) to a vehicle air conditioner.

However, each of these Patent Documents 1 to 3 merely discloses a basic refrigeration cycle of a vehicle air conditioner using carbon dioxide refrigerant (CO ₂ refrigerant), and each element constituting the refrigeration cycle is disclosed. There is no disclosure of how to mount and arrange the vehicle.
JP 2007-191125 A JP 2006-327350 A JP 2003-214713 A

  Therefore, 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 exchanger for heat dissipation in front of the powertrain unit disposed in the engine room, and is in the vicinity of the dash panel. An evaporative heat exchanger is disposed in the refrigerant conduit, and the heat dissipation heat exchanger and the evaporative heat exchanger are connected by a refrigerant conduit, and the refrigerant conduit extends across the vehicle width direction below the front of the heat dissipation heat exchanger. The refrigerant conduit is covered with a bumper member provided at the front end portion of the vehicle, so that the dead space between the heat exchanger for heat dissipation and the bumper member is effectively used. In addition, when the bumper member receives an impact due to a vehicle collision, a vehicle air conditioner arrangement structure capable of absorbing the impact load with a refrigerant conduit located below and in front of the heat dissipation heat exchanger is provided. With the goal.

  The arrangement of the vehicle air conditioner according to the present invention includes a compressor for compressing the refrigerant, a heat dissipation heat exchanger, and an evaporation heat exchanger in a refrigerant circulation path through which the refrigerant circulates. An arrangement structure of a vehicle air conditioner including an air conditioner that adjusts the temperature in the passenger compartment by means of a heat exchanger, wherein a dash panel that partitions the passenger compartment and the engine compartment in the vehicle front-rear direction is provided, A refrigerant that guides the refrigerant by forming the refrigerant circulation path by disposing the heat-dissipating heat exchanger in front of the arranged powertrain unit, disposing the evaporating heat exchanger in the vicinity of the dash panel. The heat dissipating heat exchanger and the evaporating heat exchanger are connected by a conduit, and the refrigerant conduit is disposed in the vehicle width direction at the front lower side of the heat dissipating heat exchanger and provided at the front end of the vehicle. By the bumper member It is intended to cover the refrigerant conduit.

According to the said structure, a refrigerant | coolant conduit | pipe can be arrange | positioned using the dead space between the heat exchanger for thermal radiation and a bumper member effectively.
In addition, when the bumper member receives an impact due to a vehicle collision, the impact load can be absorbed by the refrigerant conduit located at the lower front of the heat dissipation heat exchanger.

In one embodiment of the present invention, the refrigerant conduit positioned below the front of the heat-dissipating heat exchanger is disposed so as to be deformable so as to absorb a predetermined energy with respect to a load in the longitudinal direction of the vehicle. is there.
According to the above configuration, since the refrigerant conduit is arranged so as to be deformable, the absorbability of impact (impact load in the vehicle longitudinal direction) is further improved.

In one embodiment of the present invention, the left and right portions of the refrigerant conduit located in the lower front portion of the heat-dissipating heat exchanger are formed as bent portions having a planar view wave shape, and the bent portions perform predetermined energy absorption. It is comprised as follows.
According to the above configuration, the bending portion (the bending portion by the refrigerant conduit itself) is deformed, so that the impact load (displacement in the front-rear direction) at the time of the vehicle collision can be appropriately absorbed without causing an increase in the number of parts. Can do.

In one embodiment of the present invention, the bumper member includes a foot wiping portion for protecting a pedestrian, and the foot wiping portion covers a refrigerant conduit located at a lower front side of the heat dissipation heat exchanger. is there.
According to the above configuration, at the time of contact between the vehicle and the pedestrian, the pedestrian can be removed by the refrigerant conduit located at the rear portion of the bumper member, and the upper body of the pedestrian is tilted on the hood. And pedestrian protection. And since the above-mentioned refrigerant | coolant conduit | pipe is applied to the member for foot removal of a pedestrian protection, coexistence with the layout efficiency and safety ensuring of this refrigerant | coolant conduit | pipe can be aimed at.

  In one embodiment of the present invention, an conditioned air passage is provided for guiding the conditioned air through the evaporating heat exchanger into the vehicle interior, and the conditioned air is blown to the evaporating heat exchanger in the conditioned air passage. A blower unit, and an air distribution unit that distributes and distributes the conditioned air from the evaporating heat exchanger to a plurality of air conditioned air outlets provided in the vehicle interior, the evaporating heat exchanger and the The blower unit and the air distribution unit are integrated into a single unit and arranged on one side of the dash panel corresponding to the passenger seat.

According to the above configuration, the entire heat exchanger for evaporation, the blower unit, and the air distribution unit are integrated into one unit and arranged on one side of the dash panel, that is, on the passenger seat side. Can secure a sufficient living space, and can secure the maximum living space on the passenger seat side, and it is concentrated on one side to improve the assemblability. be able to.
That is, it is possible to achieve both the comfort in the passenger compartment and the arrangement of an air conditioner such as a refrigerant conduit.

In one embodiment of the present invention, the refrigerant is a carbon dioxide refrigerant.
According to the above configuration, the refrigerant, since a high compression pressure is required carbon dioxide refrigerant (CO ₂ refrigerant), global warming potential minimum, and after that there is no toxicity, it is possible to secure a non-flammable, Effective for 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, the heat dissipation heat exchanger is provided in front of the powertrain unit provided in the engine room, and in the vicinity of the dash panel. An evaporative heat exchanger is disposed in the refrigerant conduit, and the heat dissipation heat exchanger and the evaporative heat exchanger are connected by a refrigerant conduit, and the refrigerant conduit extends across the vehicle width direction below the front of the heat dissipation heat exchanger. Since the refrigerant conduit is covered with the bumper member provided at the front end of the vehicle, the refrigerant conduit is arranged using the dead space between the heat exchanger for heat dissipation and the bumper member. In addition, when the bumper member receives an impact due to a vehicle collision, there is an effect that the impact load can be absorbed by the refrigerant conduit positioned below the front of the heat-dissipating heat exchanger.

  When the bumper member receives an impact due to a vehicle collision, the purpose of absorbing the impact load with the refrigerant conduit is to provide a refrigerant circulation path through which the refrigerant circulates, a compressor that compresses the refrigerant, a heat exchanger for heat dissipation, and evaporation. In a vehicle air conditioner arrangement structure comprising an air conditioner for adjusting the temperature in the vehicle interior by the evaporating heat exchanger, a dash that partitions the vehicle compartment and the engine room in the vehicle longitudinal direction A heat dissipating heat exchanger disposed in front of a powertrain unit disposed in the engine room, the evaporating heat exchanger disposed in the vicinity of the dash panel, and the refrigerant circulation path. The heat dissipation heat exchanger and the evaporation heat exchanger are connected by a refrigerant conduit that guides the refrigerant by forming the refrigerant and the refrigerant conduit is disposed in the vehicle width direction below the front of the heat dissipation heat exchanger. Vehicle The bumper member provided on the front end portion is achieved in construction that covers the refrigerant duct.

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. 10, a variable capacity compressor 1 that compresses a 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 with outside air, particularly traveling wind. 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 an internal heat exchanger 5 that exchanges heat between the refrigerant cooled by the gas cooler 2 and a low-pressure refrigerant that is returned to the compressor 1 from the accumulator 6 to be described later, and the refrigerant that has passed through the evaporator 4 are gas-liquid separated. An accumulator 6 as a pressure accumulator that sends only a gas-phase refrigerant (CO ₂ gas refrigerant) to the compressor 1, and these elements 1 to 6 are connected in a closed loop by lines L 1 to L 7 as refrigerant conduits. In addition to constituting the refrigeration cycle, the refrigerant circulation path 7 through which the refrigerant circulates is formed by these lines L1 to L7 (refrigerant conduits).

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 heat of the high-temperature and high-pressure CO ₂ refrigerant with the outside air, mainly with the traveling wind, radiates and liquefies, 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 takes heat of the inside / outside air (air conditioned air) passing through the evaporator 4 to evaporate the refrigerant, and the evaporator 4 adjusts the temperature in the vehicle interior.

  The accumulator 6 (pressure accumulator) gas-liquid separates the refrigerant discharged from the evaporator 4, temporarily pools the liquid refrigerant to prevent liquid compression by the compressor 1, and exchanges only the gas refrigerant for the internal heat exchange in the next stage. It returns to the compressor 1 through the vessel 5.

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 room 11 in the front-rear direction of the vehicle includes a dash central recess 13 </ b> A that is recessed toward the vehicle rear at the center in the vehicle width direction. The dash side portions 13B and 13C extending from the front end of the dash center concave portion 13A to both sides in the vehicle width direction are formed, and the dash side portion 13B (corresponding to the general surface of the dash lower panel) on the driver's seat side extends straight in the vehicle width direction. On the other hand, the dash side portion 13C on the passenger seat side is formed in a convex shape projecting toward the engine room 11 side.

  As shown in the side view in FIG. 1 and in the plan view in FIG. 2, the center of the floor panel 14 in the vehicle width direction protrudes upward into the passenger compartment 12 and extends in the longitudinal direction of the vehicle. Is provided with a tunnel portion 19 extending in the direction. The tunnel portion 19 extends between the dash lower panel 13 and the bulkhead 17 (see FIG. 1) 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-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 side sills 20, 20 extend forward to a position where they overlap with the rear of the vehicle.

  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.

As shown in FIGS. 1 and 2, a front cross member 30 (so-called No. 1.5 cross member) having a closed cross-sectional structure extending in the vehicle width direction is provided between the pair of left and right front side frames 29, 29. .
In addition, as shown in FIG. 2, a bumper rain 32 (specifically, front front) extends in front of a pair of left and right front side frames 29, 29 via crash cans 31, 31 (impact energy absorbing member). Bumper reinforcement).

  Wheel houses 33 and 33 (see FIG. 6, only the wheel house on the right side of the vehicle is shown) are provided outside the pair of left and right front side frames 29 and 29 described above. As shown in FIG. 6, a suspension tower 33T (specifically, a suspension tower) is integrally provided on the inner side of the vehicle 33 in the vehicle width direction and at a substantially central portion in the front-rear direction of the wheel house 33.

  Further, as shown in FIG. 6, 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 each 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.

By the way, as shown in FIG. 1, 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 front of the engine 38 in the engine room 11. It is inclined and arranged. Here, the radiator 37 and the cooling fan 36 described above are integrated to constitute a radiator unit.
Further, as shown in FIGS. 1 and 2, a gas cooler 2 as a heat-dissipating heat exchanger is provided upright in front of the radiator 37 so that the traveling wind is most likely to hit the gas cooler 2. ing.

An internal heat exchanger 5 is disposed on the back portion of the gas cooler 2 (rear portion in the vehicle longitudinal direction), and an expansion valve 3 is disposed on the right side of the back portion of the internal heat exchanger 5.
Further, the accumulator 6 is provided upright in a dead space surrounded by the gas cooler 2, the right front side frame 29, and the front cross member 30.

  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, but the reciprocating engine is illustrated in the drawings.

  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.
That is, a front bumper 46 as a bumper member is provided at the front end portion of the vehicle, and the front bumper 46 is provided with a foot wiper 46a for protecting a pedestrian at the lower part thereof.

  Further, as shown in FIG. 3, the front window 47 covers a front window opening formed between the left and right front pillars 48, 48, the front end of the roof portion 49, and the upper end of a cowl portion (not shown). It is.

  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 the wheel house 33 shown in FIG.
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 dash side 13B (the other dash side) on the left side of the vehicle and the steering wheel 56. The driver seat 61 includes a seat cushion 61C and a seat back 61B. It has.

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

  Left and right rear seats 63 and 63 (rear row seats) each provided with a seat cushion 63C and a seat back 63B are disposed behind the front row seat 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.

This gas cooler 2 is arranged between a pair of left and right front side frames 29, 29, like the radiator 37. A line L6 (from the accumulator 6 to the internal heat exchanger 5 ( 10) is disposed across the vehicle width direction as shown in FIG.
The above-mentioned line L6 is a refrigerant conduit that guides the refrigerant by forming the refrigerant circulation path 7 as shown in FIG.

An internal heat exchanger 5 is disposed on the back surface of the gas cooler 2, that is, on the vehicle rear surface of the gas cooler 2, and the expansion valve 3 is attached to the right side of the back of the internal heat exchanger 5.
Further, the accumulator 6 is disposed upright in a dead space surrounded by the gas cooler 2, the right front side frame 29, and the right front portion of the front cross member 30.

As shown in FIGS. 1 to 3, the above-described evaporator 4, blower unit 8, and air distribution unit 9 constitute an air conditioning unit 64, and these elements, that is, the evaporator 4, blower unit 8, and air distribution The above-described air conditioning unit 64 is configured as a unit with the unit 9, and the air conditioning unit 64 is disposed immediately after the dash side portion 13 </ b> C on the passenger seat side in the dash lower panel 13.
4 is an enlarged side view of the main part of FIG. 1, FIG. 5 is an enlarged plan view of the main part of FIG. 2, and FIG. 6 is a plan view showing a related structure between the air distribution unit and the air-conditioning air outlet.

As shown in FIGS. 4 to 6, the elements 4, 8, and 9 are integrated into a single housing 65, and the conditioned air passage 66 (see FIGS. 4 and 5) in the housing 65. Is set.
The conditioned air passage 66 is a passage that guides the conditioned air passing through the evaporator 4 into the vehicle compartment 12 via the air distribution unit 9 (that is, the air distribution box).
The conditioned air passage 66 has a blower unit 8 for blowing conditioned air (especially inside and outside air) to the evaporator 4 and a plurality of conditioned air outlets provided in the vehicle compartment 12 for the conditioned air from the evaporator 4. An air distribution unit 9 that distributes and distributes air is provided.

  As shown in FIGS. 4 and 5, the blower unit 8 described above has an air-conditioning air discharge portion 8 </ b> A, an inside / outside air suction port 8 </ b> B, and a blower motor 8 </ b> M. Located at the front.

  As shown in a plan view in FIG. 5, the evaporator 4 and the air distribution unit 9 are juxtaposed in the vehicle width direction behind the blower unit 8 in the air conditioning unit 64, and the evaporator is disposed outward in the vehicle width direction. 4 are arranged so that the air distribution units 9 are respectively positioned inward in the vehicle width direction.

As shown in FIG. 6, a defroster communication portion 67 and a vent communication portion 68 are connected to the downstream portion (air blowing side) of the air distribution unit 9.
A defroster duct 70 having a large number of defroster outlets 69, 69... Is connected to the above-described defroster communication portion 67 so as to prevent the front window 47 from being fogged.

Further, the vent communication portions 68 are connected to the vent ducts 71 and 72 on the driver's seat side and the passenger seat side, respectively, and drivers are provided from the left and right vent outlets 73 and 73 formed in the vent duct 71 on the driver's seat side. The air-conditioning wind is blown out toward.
Further, the air-conditioning air is blown out from the left and right vent outlets 74 and 74 formed in the vent duct 72 on the passenger seat side toward the passenger.

In FIG. 6, reference numerals 75 and 76 denote rear-seat air-conditioning air connections, and ducts (not shown) are connected to the connection parts 75 and 76 to form an air-conditioning path for rear-seat passengers. is there.
That is, the above-mentioned air distribution unit 9 distributes the air-conditioning air to the defroster air outlet 69 and the vent air outlets 73 and 74 as the air-conditioning air outlet and distributes the air.

  Further, the air conditioning unit 64 incorporating the evaporator 4, the blower unit 8, and the air distribution unit 9 is disposed immediately after the dash side portion 13C (dash side convex portion) formed in a convex shape toward the front of the vehicle. Thus, the evaporator 4 is disposed on one side in the vehicle width direction of the power train 40, that is, in the vicinity of the dash panel 13 on the right side in the vehicle width direction corresponding to the passenger seat.

As shown in a plan view in FIG. 5, a line L6 as a refrigerant conduit from the accumulator 6 to the internal heat exchanger 5 includes a right side portion 80 extending in the front-rear direction, a front side portion 81 extending in the vehicle width direction, and a front-rear direction. The left side portion 82 and the left side portion 82 are integrally formed in this order, and the right side portion 80 and the left side portion 82 described above absorb predetermined energy with respect to a load in the vehicle front-rear direction (input load at the time of a vehicle collision). It is arranged to be deformable.
That is, in this embodiment, as shown in a plan view in FIG. 5, the right side portion 80 and the left side portion 82 of the line L6 are formed in the bent portions α, α having a plan view wave shape, and these left and right bent portions α, α. Therefore, it is configured to perform predetermined energy absorption.

The front side 81 is supported on the lower front surface of the gas cooler 2 by a plurality of support members 83, 83. The support member 83 includes a rod provided integrally with the front side portion 81 and a pipe that is integrally attached to the gas cooler 2 and that inserts the rod so as to move back and forth.
Furthermore, the front side portion 81 in the above-described line L6 is disposed so as to be positioned in front of the vehicle with respect to the bumper rain 32 as shown in FIGS.

  As shown in FIG. 4, the line L6 is covered with a foot wiper 46a of a front bumper 46 as a bumper member. As shown in FIG. A pedestrian is wiped off at a line L6 (especially, its front side 81) located immediately after 46a, and the upper body of the pedestrian is tilted onto the hood 45 as shown in FIG. It is configured to protect pedestrians.

On the other hand, as shown in a plan view in FIG. 5, the gas cooler 2 and the internal heat exchanger 5 are connected to each other at the right ends of the lines 2 and 5 through a line L 2, and the internal heat exchanger 5 and the expansion valve 3 are connected. Are connected by a line L3.
The outlet portion of the expansion valve 3 and the evaporator 4 are connected by a line L4 extending substantially in the front-rear direction of the vehicle. The evaporator 4 and the accumulator 6 are lines extending substantially in the front-rear direction of the vehicle substantially parallel to the line L4. Connected with L5.

Here, bent portions β1 and β2 as displacement-permissible portions extending in the vehicle width direction are integrally formed at intermediate portions of the portions extending in the vehicle front-rear direction in the lines L4 and L5 described above. A predetermined displacement is allowed at each of the bent portions β1 and β2 to prevent the refrigerant conduit from being damaged at the time of a vehicle collision, and the bent portions β1 and β2 are set to be damaged by a collision load exceeding a predetermined value. , Β2 is configured to discharge a nonflammable CO ₂ refrigerant into the engine room 11 to prevent a vehicle fire when it is damaged.
In the figure, arrow F indicates the front of the vehicle, and arrow R indicates the rear of the vehicle.

  Thus, the arrangement structure of the vehicle air conditioner according to the embodiment shown in FIGS. 1 to 7 includes the compressor 1 that compresses the refrigerant in the refrigerant circulation path 7 through which the refrigerant circulates, and the heat exchanger for heat dissipation. (Refer to the gas cooler 2) and an evaporating heat exchanger (see the evaporator 4), and an air conditioner (see the air conditioning unit 64) that adjusts the temperature in the passenger compartment 12 by the evaporating heat exchanger (evaporator 4). The vehicle air-conditioning apparatus is provided with a dash lower panel 13 that partitions the vehicle compartment 12 and the engine room 11 in the vehicle front-rear direction, and in front of the power train 40 provided in the engine room 11. The heat dissipating heat exchanger (gas cooler 2) is disposed, the evaporating heat exchanger (see the evaporator 4) is disposed in the vicinity of the dash lower panel 13, and the refrigerant circulation path 7 is formed to guide the refrigerant. The heat dissipation heat exchanger (gas cooler 2) and the evaporation heat exchanger (evaporator 4) are connected by a medium conduit, and the refrigerant conduit (see line L6) is connected to the front of the heat dissipation heat exchanger (gas cooler 2). The refrigerant conduit (see the line L6) is covered with a bumper member (see the front bumper 46) provided at the front end of the vehicle. (See FIGS. 5 and 10).

According to this configuration, the refrigerant conduit (line L6) can be disposed by effectively utilizing the dead space between the heat exchanger for heat dissipation (gas cooler 2) and the bumper member (front bumper 46).
Moreover, when the bumper member (front bumper 46) receives an impact due to a vehicle collision, the impact load can be absorbed by the refrigerant conduit (line L6) positioned in front of and below the heat dissipation heat exchanger (gas cooler 2). Thus, the influence on the engine room 11 can be mitigated.

In addition, a refrigerant conduit (see line L6) located at the front lower side of the heat dissipating heat exchanger (see gas cooler 2) is arranged to be deformable so as to absorb a predetermined energy with respect to a load in the longitudinal direction of the vehicle. (See FIGS. 4 and 5).
According to this configuration, since the refrigerant conduit (see line L6) is disposed so as to be deformable, the shock absorption is further improved.

Further, both the left and right parts (see the left side part 82 and the right side part 80) of the refrigerant conduit (see the line L6) located in the lower front part of the heat dissipation heat exchanger (see the gas cooler 2) are bent portions α having a plan view wave shape. The bent portion α is configured to absorb a predetermined energy (see FIG. 5).
According to this configuration, the bending portion α is deformed, so that it is possible to appropriately absorb the impact load at the time of the vehicle collision without causing an increase in the number of parts.

Moreover, the bumper member (refer to the front bumper 46) includes a foot wiper 46a for protecting a pedestrian, and the foot wiper 46a is a refrigerant positioned below and forward of the heat dissipation heat exchanger (see the gas cooler 2). It covers the conduit (see line L6) (see FIG. 4).
According to this configuration, when the vehicle and the pedestrian are in contact with each other, the foot wiper 46a of the bumper member (front bumper 46) can also remove the pedestrian by the refrigerant conduit (see line L6) located at the rear. As shown in FIG. 7, the upper body of the pedestrian can be tilted on the hood 45 to protect the pedestrian. And since the above-mentioned refrigerant | coolant conduit | pipe (refer line L6) is applied to the member for foot removal of a pedestrian protection, it can aim at coexistence with the layout efficiency and safety | security ensuring of this refrigerant | coolant conduit | pipe (refer line L6).

  In addition, an air-conditioning air passage 66 that guides the air-conditioning air through the evaporating heat exchanger (see the evaporator 4) into the passenger compartment 12 is provided, and the air-conditioning air passage 66 has the evaporating heat exchanger (see the evaporator 4). ) And a plurality of air-conditioning air outlets (defroster outlet 69, vents) provided in the vehicle compartment 12 with the air-conditioning air from the heat exchanger for evaporation (see the evaporator 4). An air distribution unit 9 that distributes and distributes the air to the outlets 73 and 74), and the heat exchanger for evaporation (see the evaporator 4), the blower unit 8, and the air distribution unit 9 are integrated into a unit. (Refer to the air conditioning unit 64) and disposed on one side of the dash lower panel 13 corresponding to the passenger seat (see FIGS. 2, 5, and 6).

According to this configuration, the entire heat exchanger for evaporation (evaporator 4), the blower unit 8 and the air distribution unit 9 (see the air conditioning unit 64) are integrated, and one side of the dash lower panel 13, that is, Since it is installed on the passenger seat side, a sufficient living space can be secured on the driver's seat side, and a maximum living space can be secured on the passenger seat side. Since it arrange | positions, the improvement of the assembly property can be aimed at.
That is, it is possible to achieve both the comfort in the passenger compartment 12 and the arrangement of an air conditioner (air conditioning unit 64) such as a refrigerant conduit.

Further, the refrigerant is a carbon dioxide refrigerant (see FIG. 10).
According to this configuration, since the refrigerant is a carbon dioxide refrigerant (CO ₂ refrigerant) that requires high compression pressure, the global warming potential is minimal and nontoxic, and nonflammability can be ensured. Effective for safety.

In place of the air conditioning unit 64 shown in FIG. 4, an air conditioning unit 64 shown in FIG. 8 may be used.
That is, the air conditioning unit 64 shown in FIG. 4 is configured such that the upper surface of the front side frame 29 in front of the dash lower panel 13 and the lower surface of the housing 65 of the air conditioning unit 64 substantially coincide with each other. The unit 64 is formed by extending a housing 65 at a portion where the evaporator 4 and the air distribution unit 9 are installed downward on the passenger compartment side of the dash lower panel 13, and by this extension, the internal volume of the housing 65 is expanded. Correspondingly, the evaporator 4 and the air distribution unit 9 having a large vertical dimension are arranged in the housing 65.

If comprised in this way, since the large sized evaporator 4 can be used, the improvement of an air conditioning performance can be aimed at. In the embodiment of FIG. 8 as well, other configurations, operations, and effects are the same as those of FIG. 4, and therefore, in FIG. 8, the same parts as those in FIG. To do.
Further, the refrigerant conduit layout shown in FIG. 9 may be adopted instead of the refrigerant conduit layout shown in FIG.

That is, in the embodiment shown in FIG. 5, the line L6 is disposed only between the pair of left and right front side frames 29, 29. However, in this embodiment shown in FIG. The line L6 is disposed so as to extend in the direction and substantially correspond to the length of the bumper rain 32 in the vehicle width direction.
If comprised in this way, expansion of the foot-pasting area | region by the line L6, especially the front side part 81 can be aimed at.

  In the embodiment of FIG. 9 as well, other configurations, operations, and effects are almost the same as those in FIG. 5, and therefore, in FIG. 9, the same parts as those in FIG. Omitted.

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 air conditioner corresponds to the air conditioning unit 64,
The dash panel corresponds to the dash lower panel 13,
The powertrain unit is compatible with the powertrain 40,
The refrigerant conduit corresponds to the line L6 among the plurality of lines L1 to L7,
The bumper member corresponds to the front bumper 46,
The air-conditioning air outlet corresponds to the defroster outlet 69 and the vent outlets 73 and 74.
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. Moreover, the refrigerant | coolant conduit | pipe arrange | positioned across the vehicle width direction in the front lower direction of the gas cooler 2 is replaced with the line L6 of each said Example by the line L2 which connects between the gas cooler 2 and the internal heat exchanger 5. FIG. Alternatively, it may be the line L7 connecting the internal heat exchanger 5 and the compressor 1.

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 1 is an enlarged side view of the main part of FIG. The main part enlarged plan view of FIG. The top view which shows the related structure of an air distribution unit and an air-conditioning wind outlet Explanatory drawing at the time of contact between vehicle and pedestrian Side view showing another embodiment of arrangement structure of vehicle air conditioner The top view which shows other Example of the arrangement | positioning structure of a vehicle air conditioner 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)
40 ... Powertrain (Powertrain unit)
46 ... Front bumper (bumper member)
46a ... foot payer 64 ... air conditioning unit (air conditioner)
66 ... Air-conditioning air passage 69 ... Defroster outlet (air-conditioning outlet)
73, 74 ... Vent outlet (air conditioning outlet)
L6 ... line (refrigerant conduit)
α: Bending part

Claims (6)

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,
Disposing the heat dissipation heat exchanger in front of the powertrain unit disposed in the engine room,
The evaporation heat exchanger is disposed in the vicinity of the dash panel,
The heat dissipation heat exchanger and the evaporation heat exchanger are connected by a refrigerant conduit that forms the refrigerant circulation path and guides the refrigerant,
The refrigerant conduit is disposed across the vehicle width direction below the front of the heat dissipation heat exchanger,
An arrangement structure of a vehicle air conditioner in which the refrigerant conduit is covered by a bumper member provided at a front end portion of the vehicle. The arrangement of the vehicle air conditioner according to claim 1, wherein the refrigerant conduit positioned below and in front of the heat-dissipating heat exchanger is arranged so as to be deformable so as to absorb a predetermined energy with respect to a load in the longitudinal direction of the vehicle. Construction structure. The left and right portions of the refrigerant conduit located in the lower front part of the heat-dissipating heat exchanger are formed in a bent portion having a plan view wave shape, and the bent portion absorbs predetermined energy. Arrangement structure of vehicle air conditioner. The bumper member includes a foot wiper for pedestrian protection,
The arrangement structure of the vehicle air conditioner according to any one of claims 1 to 3, wherein a refrigerant conduit located at a lower front side of the heat radiating heat exchanger is covered by the foot wiping portion. An conditioned air passage that guides the conditioned air through the evaporating heat exchanger into the passenger compartment;
A blower unit that blows conditioned air to the evaporating heat exchanger and conditioned air from the evaporating heat exchanger are distributed to the plurality of conditioned air outlets provided in the vehicle interior in the conditioned air passage. An air distribution unit for air distribution is provided,
The said heat exchanger for evaporation, the said blower unit, and the said air distribution unit are unitized integrally, and it has arrange | positioned in one side of the dash panel corresponding to a passenger seat. Arrangement structure of vehicle air conditioner. The arrangement structure of a vehicle air conditioner according to any one of claims 1 to 5, wherein the refrigerant is a carbon dioxide refrigerant.

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