JP2015196452A - Vehicular air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To inhibit swinging of a steering 7 and an instrument panel 3 within a cabin 2 from making an occupant feel uncomfortable.SOLUTION: An air conditioning unit 10 of a vehicle air conditioner includes a heater unit 20 and a blower unit 30. A central portion S2 in the vehicle width direction of a blower case 60 of the blower unit 30 is offset on a driver side relative to a central portion S1 in the vehicle width direction of a reinforcement member 5. Thus, the blower case 60 is mounted to a portion where the amplitude of vibration of the reinforcement member 5 is small compared to the central portion S1 in the vehicle width direction of the reinforcement member 5. As a result, vibration of the reinforcement member 5 caused by vibration of fans 80a, 80b can be suppressed.

Description

  The present invention relates to a vehicle air conditioner.

  2. Description of the Related Art Conventionally, an indoor air conditioning unit of a vehicle air conditioner includes a blower unit and a heater unit that adjusts the temperature of the air flow blown from the blower unit toward the vehicle interior, and the heater unit and the blower unit are supported by the steering member. (For example, Patent Document 1).

  Generally, the steering member is a beam member extending in the vehicle width direction, and both longitudinal ends thereof are fixed to the vehicle chassis.

JP 2000-355210 A

  In order to reduce the size of the indoor air conditioning unit, the present inventors have studied a suction-type indoor air conditioning unit in which a blower unit is arranged on the downstream side of the air with respect to the heater unit.

  According to the present inventors, in the suction-type indoor air conditioning unit 10a of FIG. 10, if the weight balance in the rotational direction of the fan constituting the blower unit 30a is unbalanced, the blower unit is accompanied with the rotation of the fan. Vibration occurs at 30a. Therefore, when the blower unit 30a is supported at the center in the vehicle width direction of the steering member 5a, when vibration is transmitted from the blower unit 30a to the steering member 5a, the steering member 5a vibrates and the vibration is amplified. . Accordingly, the vibration of the steering member 5a is transmitted to the steering 7 and the instrument panel 3, and the steering 7 and the instrument panel 3 are shaken to give the passenger an uncomfortable feeling.

  The present invention has been made in view of the above points, and an object of the present invention is to provide a vehicle air conditioner that reduces vibrations in the passenger compartment.

  In order to achieve the above object, according to the first aspect of the present invention, a heat exchange case (21) for circulating an air flow and a heat exchanger (in the heat exchange case for exchanging heat between the air flow ( 42, 44), a blower case (60) having a blow opening (64a to 64e) for blowing an air flow blown from the heat exchange case into the vehicle compartment, and a blower case And a blower unit (30) provided with fans (80a, 80b) that blow the air flow blown out of the heat exchange case into the vehicle interior from the blowout opening as it rotates. Both ends in the longitudinal direction are formed to extend in the width direction and are supported by beam members (4, 5) fixed to the chassis (6a, 6b) of the vehicle, respectively. Parts, characterized in that it is offset with respect to the vehicle width direction central portion of the beam member.

  According to invention of Claim 1, the vehicle width direction center part of the blower case is offset with respect to the vehicle width direction center part of a beam member. For this reason, the blower case is attached to a location where the vibration amplitude of the beam member is smaller than that of the beam member in the vehicle width direction center. Therefore, it is possible to suppress the vibration of the beam member due to the vibration of the fan, so that the vibration in the passenger compartment can be reduced.

  In addition, the code | symbol in the bracket | parenthesis of each means described in this column and the claim shows the correspondence with the specific means as described in embodiment mentioned later.

It is a figure which shows the figure which mounted the air conditioning unit of the vehicle air conditioner in 1st Embodiment of this invention in the vehicle. It is a schematic diagram which shows schematic internal structure of the vehicle air conditioner of FIG. FIG. 3 is a sectional view taken along line III-III in FIG. 2. It is IV-IV sectional drawing in FIG. It is sectional drawing of the blower unit in a comparative example. It is the figure which expanded the air-conditioning unit periphery of FIG. It is the figure which expanded the air-conditioning unit periphery in a comparative example. It is a figure which shows the figure which mounted the air conditioning unit of the vehicle air conditioner in 2nd Embodiment of this invention in the vehicle. It is a figure which shows the figure which mounted the air conditioning unit of the vehicle air conditioner in the modification of this invention in the vehicle. It is a figure which shows the figure which mounted the air conditioning unit of the vehicle air conditioner in a comparative example in the vehicle.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following embodiments, parts that are the same or equivalent to each other are given the same reference numerals in the drawings in order to simplify the description.

(First embodiment)
1 and 2 are sectional views of an air conditioning unit of a vehicle air conditioner according to the first embodiment of the present invention. In FIG. 1 and FIG. 2, the front, rear, left, right, upper, and lower arrows indicate directions when the vehicle air conditioner is mounted on a vehicle. In the present embodiment, an example in which the air conditioning unit 10 is mounted on a vehicle in which the front right seat 1a is a driver seat (Dr) and the front left seat 1b is a passenger seat (Pa) is shown.

  The air conditioning unit 10 according to the present embodiment is a two-layered inside / outside air conditioning unit, and includes a heater unit 20 and a blower unit 30. The blower unit 30 is arranged offset to the right side (that is, the driver's seat side) with respect to the center part in the vehicle width direction in the lower part of the instrument panel 3 in the vehicle interior 2. The heater unit 20 is disposed in the lower part of the instrument panel 3 in the vehicle interior 2 so as to be offset from the center part S1 'in the left-right direction of the vehicle to the left side (that is, the passenger seat side).

  The heater unit 20 in FIG. 2 includes a heater case 21. The heater case 21 is made of a resin molded product, such as polypropylene, which has some elasticity and is excellent in strength. The heater case 21 is located on the vehicle rear side (that is, the vehicle interior 2) with respect to the firewall 4. The firewall 4 is a metal wall that is disposed in front of the vehicle interior 2 and isolates the interior of the vehicle interior 2 from the exterior of the vehicle interior. The firewall 4 is formed to extend in the vehicle width direction. The right side of the firewall 4 in the vehicle width direction is fixed to the chassis 6a, and the left side of the firewall 4 in the vehicle width direction is fixed to the chassis 6b. The heater case 21 is supported by a reinforcing member (phosphorus hose) 5 as a beam member. The reinforcing member 5 is a metal beam member that is formed to extend in the vehicle width direction and reinforces the chassis (frames) 6a and 6b of the vehicle. The reinforcing member 5 is disposed at the lower part of the instrument panel 3. The reinforcing member 5 is fixed to the chassis 6a at the right end in the longitudinal direction. The left end side in the longitudinal direction of the reinforcing member 5 is fixed to the chassis 6b.

  The heater case 21 includes a resin wall 23 as a partition wall that partitions the upper air passage 22a and the lower air passage 22b. The upper air passage 22a and the lower air passage 22b allow the air flow introduced from the outside air introduction port 24a and the inside air introduction port 24b to flow toward the vehicle interior 2. The outside air introduction port 24 a and the inside air introduction port 24 b are formed in the heater case 21. The outside air introduction port 24a is formed to introduce outside air (air outside the passenger compartment) into the air passages 22a and 22b. The inside air introduction port 24b is formed to introduce inside air (vehicle compartment air) into the air passages 22a and 22b. The air passages 22a and 22b are a general term for the upper air passage 22a and the lower air passage 22b.

  The heater unit 20 includes an inside / outside air switching door 25 that opens at least one of the outside air introduction port 24a and the inside air introduction port 24b. The inside / outside air switching door 25 is driven by an actuator (not shown). Further, the heater unit 20 includes an inside / outside air guide 26. The inside / outside air guide 26 guides outside air introduced from the outside air introduction port 24a to the upper air passage 22a in a state where the outside air introduction port 24a and the inside air introduction port 24b are opened by the inside / outside air switching door 25, and from the inside air introduction port 24b. This is a guide for guiding the inside air to be introduced to the lower air passage 22b.

  The heater unit 20 includes a filter 40, a cooling heat exchanger 42, a heater core 44, and air mix doors 48a and 48b.

  The filter 40 is disposed in the heater case 21 so as to straddle the upper air passage 22a and the lower air passage 22b. The filter 40 filters the airflow introduced from the inlets 24a and 24b and flowing through the upper air passage 22a, and filters the airflow introduced from the inlets 24a and 24b and flowing through the lower air passage 22b.

  The cooling heat exchanger 42 is disposed in the heater case 21 so as to straddle the upper air passage 22a and the lower air passage 22b. The cooling heat exchanger 42 is disposed on the downstream side of the air flow with respect to the filter 40. The cooling heat exchanger 42 absorbs the latent heat of evaporation of the refrigerant in the well-known refrigeration cycle from the air that has passed through the filter 40 and cools this air. That is, the cooling heat exchanger 42 cools the air flow for each air passage by heat exchange between the air flow that has passed through the filter 40 and the refrigerant, and blows out cold air.

  The heater core 44 is arranged in the heater case 21 on the downstream side of the air flow with respect to the cooling heat exchanger 42 and so as to straddle the upper air passage 22a and the lower air passage 22b. The heater core 44 heats the cold air that has passed through the upper air passage 22a with engine cooling water (hot water). The heater core 44 heats the cool air by heat exchange between the cool air that has passed through the lower air passage 22b and the engine coolant (warm water), and blows out the warm air.

  A bypass passage 46a is formed in the upper air passage 22a to allow the cool air from the cooling heat exchanger 42 to flow through the heater core 44 toward the passenger compartment. In the lower air passage 22b, a bypass passage 46b is formed in which the cool air from the cooling heat exchanger 42 flows through the heater core 44 toward the vehicle interior.

  The air mix door 48a is a door that is disposed in the upper air passage 22a and changes the ratio of the amount of air flowing through the heater core 44 and the amount of air flowing through the bypass passage 46a out of the amount of air blown from the cooling heat exchanger 42. The air mix door 48b is a door that is disposed in the lower air passage 22b and changes the ratio of the amount of air flowing through the heater core 44 and the amount of air flowing through the bypass passage 46b out of the amount of air blown from the cooling heat exchanger 42. . In the present embodiment, as the air mix doors 48a and 48b, slide doors that are supported with respect to the heater case 21 so as to be slidable are provided.

  An actuator 50a that outputs a driving force to the air mix door 48a and a power transmission mechanism 51a that transmits the drive output of the actuator 50a to the air mix door 48a are disposed in the upper air passage 22a. The actuator 50 a and the power transmission mechanism 51 a are arranged on the downstream side of the air flow with respect to the filter 40 in the heater case 21.

  An actuator 50b that outputs a driving force to the air mix door 48b and a power transmission mechanism 51b that transmits the drive output of the actuator 50b to the air mix door 48b are disposed in the lower air passage 22b. The actuator 50 b and the power transmission mechanism 51 b are disposed on the downstream side of the air flow with respect to the filter 40 in the heater case 21.

  In the present embodiment, the actuators 50 a and 50 b and the power transmission mechanisms 51 a and 51 b are supported by the heater case 21. As the actuators 50a and 50b, electric motors such as servo motors are used. Each of the power transmission mechanisms 51a and 51b is constituted by a plurality of gears, rotating shafts, and the like, and is a link mechanism that transmits the drive output of the actuators 50a and 50b to the air mix door 48b.

  The heater case 21 is formed with an air outlet 28a of the upper air passage 22a and an air outlet 28b of the lower air passage 22b. The air outlet 28a is disposed on the downstream side of the air flow with respect to the heater core 44 and the bypass passage 46a. The air outlet 28b is disposed on the downstream side of the air flow with respect to the heater core 44 and the bypass passage 46b.

  The blower unit 30 includes a blower case 60. The blower case 60 is located on the vehicle rear side (that is, the vehicle interior 2) with respect to the firewall 4. The blower case 60 is fixed to the reinforcing member 5. That is, the blower case 60 is supported by the reinforcing member 5. A center portion S2 (see FIG. 1) in the vehicle width direction (vehicle left-right direction) of the blower case 60 is offset to the driver seat (vehicle right side) side with respect to the center portion S1 of the reinforcing member 5 in the vehicle width direction. Has been placed. In the present specification, for convenience of explanation, the central portion in the vehicle width direction of the reinforcing member 5 is S1 and the central portion in the left-right direction of the vehicle is S1 '.

  The blower case 60 is made of a resin-molded product, such as polypropylene, having a certain degree of elasticity and excellent strength. The blower case 60 includes a resin wall 62 as a partition wall that partitions the upper air passage 61a and the lower air passage 61b. The blower case 60 is provided with an air inlet 63a that guides an air flow blown from the air outlet 28a of the heater case 21 into the upper air passage 61a. The blower case 60 is provided with an air inlet 63b that guides an air flow blown from the air outlet 28b of the heater case 21 into the lower air passage 61b.

  A duct 70 is disposed between the heater case 21 and the blower case 60. The duct 70 constitutes an air conditioning case together with the heater case 21 and the blower case 60, and is made of a molded resin product having a certain degree of elasticity and excellent strength, such as polypropylene. The duct 70 includes a resin wall 72 that partitions the upper air passage 71a and the lower air passage 71b. The upper air passage 71a is used to guide the air flow blown from the air outlet 28a of the heater case 21 into the upper air passage 61a. The lower air passage 71b is used to guide the air flow blown from the air outlet 28b of the heater case 21 into the lower air passage 61b.

The duct 70 of the present embodiment is such that the area of the cross section orthogonal to the main air flow direction of the air flow blown out from the heater case 21 decreases from the air outlets 28a and 28b toward the air inlets 63a and 63b. It is formed in a taper shape.
The main flow is an air flow having a large air volume among a plurality of air flows blown from the heater case 21 to the blower case 60.

  The blower unit 30 includes fans 80 a and 80 b and a blower motor 82. The fan 80a is supported on one side (upper side in the drawing) of the rotation shaft 81 in the axial direction. The fan 80b is supported on the other side (lower side in the figure) of the rotating shaft 81 in the axial direction.

  The fan 80a is a centrifugal fan that sucks air in the upper air passage 61a from the other axial side of the rotating shaft 81 (lower side in the figure) and blows it outward in the radial direction. The fan 80b is a centrifugal fan that sucks air in the lower air passage 61b from one side (upper side in the drawing) of the rotating shaft 81 and blows it outward in the radial direction.

  The rotation shaft 81 is disposed so as to penetrate the resin wall 62 and extend in the up-down direction (top-bottom direction). The rotation shaft 81 is disposed offset to the right side (that is, the driver's seat side) with respect to the vehicle center portion S1 'in the left-right direction. The blower motor 82 is an electric motor that rotationally drives the fans 80 a and 80 b via the rotation shaft 81. The blower motor 82 is disposed below the blower case 60.

  Face blowout openings 64a and 64b and a defroster blowout opening 65 are formed outside the blower case 60 in the radial direction centering on the rotation shaft 81 with respect to the fan 80a. The face blowing openings 64a and 64b are arranged adjacent to each other. The face blowing opening 64a is an opening for blowing an air flow toward the driver's upper body through the FACE duct 7a and the driver's seat face blowing outlet 8a. The face blowing opening 64b is an opening for blowing an air flow toward the upper half of the passenger seat through the FACE duct 7b and the passenger seat side face outlet 8b. The defroster blowing opening 64c is an opening for blowing an air flow toward the inner surface of the windshield through the DEF duct and the defroster blowing outlet (not shown).

  The face blowing opening 64a is opened and closed by the mode door 84a. The face blowing opening 64b is opened and closed by the mode door 84b. The defroster outlet 64c is opened and closed by the mode door 84c.

  Foot blowout openings 64d and 64e are formed on the blower case 60 on the radially outer side centering on the rotation shaft 81 with respect to the fan 80b. The foot blowing opening 64d is an opening for blowing an air flow toward the driver's lower body through the FOOT duct 7d and the foot blowing outlet 8d. The foot blowing opening 64e is an opening for blowing an airflow toward the passenger seat lower body through the FOOT duct 7e and the foot blowing outlet 8e. The foot outlet opening 64d is opened and closed by the mode door 84d. The foot outlet opening 64e is opened and closed by the mode door 84e.

  As the mode doors 84a, 84b, 84c, 84d, 84e of the present embodiment, a butterfly door that is rotatably supported with respect to the blower case 60 is used.

  In the blower case 60, there are an actuator 90a that outputs driving force to the mode doors 84a, 84b, and 84c, and a power transmission mechanism (not shown) that transmits the driving output of the actuator 90a to the mode doors 84a, 84b, and 84c. Has been placed. For this reason, by outputting the output of the actuator 90a to the mode door 84a through the power transmission mechanism, the mode doors 84a, 84b, and 84c are independently rotated. The power transmission mechanism is a link mechanism including a plurality of gears, a rotating shaft, and the like.

  In the blower case 60, an actuator 90b that outputs driving force to the mode doors 84d and 84e, and a power transmission mechanism (not shown) that transmits the driving output of the actuator 90b to the mode doors 84d and 84e are arranged. . Therefore, by outputting the output of the actuator 90a to the mode doors 84d and 84e through the power transmission mechanism, the mode doors 84d and 84e are independently rotated. The power transmission mechanism is a link mechanism including a plurality of gears, a rotating shaft, and the like.

  Here, the actuators 90a and 90b are disposed on the downstream side of the air flow with respect to the filter 40, and are located at the boundary between the upper air passage 61a and the lower air passage 61b.

  In the present embodiment, the actuators 90 a and 90 b and the two power transmission mechanisms are supported by the blower case 60. An electric motor such as a servo motor is used as the actuators 90a and 90b.

  Next, the inside / outside air two-layer mode will be described as a specific example of the operation of the air conditioning unit 10 of the present embodiment.

  First, the inside / outside air switching door 25 opens the outside air introduction port 24a and the inside air introduction port 24b. Then, the blower motor 82 rotates the fans 80 a and 80 b via the rotation shaft 81. For this reason, in the heater case 21, the airflow which flows toward the vehicle interior from the inlets 24a and 24b side generate | occur | produces.

  Accordingly, the outside air introduced from the outside air introduction port 24a is guided to the upper air passage 22a by the inside / outside air switching door 25 and the inside / outside air guide 26. The guided outside air passes through the filter 40 and then flows to the cooling heat exchanger 42. Thus, cold air is blown out from the cooling heat exchanger 42 in the upper air passage 22a.

  Here, a part of the cold air blown out from the cooling heat exchanger 42 flows to the heater core 44. Along with this, warm air is blown out from the heater core 44. On the other hand, of the cold air blown out from the cooling heat exchanger 42, the remaining cold air other than the cold air flowing through the heater core 44 flows into the bypass passage 46a. Accordingly, the warm air blown from the heater core 44 and the cold air that has passed through the bypass passage 46a are mixed and blown from the air outlet 28a of the upper air passage 22a to the upper air passage 71a of the duct 70.

  At this time, the air mix door 48a changes the ratio of the amount of air flowing through the heater core 44 and the amount of air flowing through the bypass passage 46a out of the amount of air blown out from the cooling heat exchanger 42, whereby the air blown out from the air outlet 28a. The temperature can be adjusted.

  The air flow adjusted in this way passes through the upper air passage 71a of the duct 70 and then flows into the upper air passage 61a of the blower case 60. Accordingly, this air flow is sucked from the other side in the axial direction with respect to the fan 80a. Therefore, the fan 80a blows out the sucked air outward in the radial direction.

  For example, when the mode door 84a opens the face blowout opening 64a, the airflow blown from the fan 80a is directed from the face blowout opening 64a toward the driver's upper body through the FACE duct 7a and the face blowout port 8a. Can be blown out. When the mode door 84b opens the face blowing opening 64b, the air flow blown from the fan 80a is blown from the face blowing opening 64b toward the upper body of the passenger seat through the FACE duct 7b and the face blowing port 8b. Can do. When the mode door 84c opens the defroster blowout opening 64c, the airflow blown from the fan 80a flows from the defroster blowout opening 64c toward the inner surface of the windshield in the vehicle interior through the DEF duct and the defroster blowout. Can be blown out.

  On the other hand, the inside air is introduced into the lower air passage 22b through the inside / outside air switching door 25 and the inside / outside air guide 26 from the inside air introduction port 24b. The inside air flows through the filter 40 and then flows into the cooling heat exchanger 42. Thus, cold air is blown out from the cooling heat exchanger 42 in the lower air passage 22b.

  Here, a part of the cold air blown out from the cooling heat exchanger 42 flows to the heater core 44. Along with this, warm air is blown out from the heater core 44. On the other hand, the remaining cold air other than the cold air flowing through the heater core 44 out of the cold air blown out from the cooling heat exchanger 42 flows into the bypass passage 46b. Accordingly, the warm air blown from the heater core 44 and the cold air that has passed through the bypass passage 46b are mixed and blown from the air outlet 28b of the lower air passage 22b to the lower air passage 71b of the duct 70.

  At this time, the air mix door 48b changes the ratio of the amount of air flowing through the heater core 44 and the amount of air flowing through the bypass passage 46a out of the amount of air blown out from the cooling heat exchanger 42, whereby the air blown out from the air outlet 28b. The temperature can be adjusted.

  The air flow thus adjusted in temperature passes through the lower air passage 71b of the duct 70 and then flows into the lower air passage 61b of the blower case 60. Accordingly, this air flow is sucked from one side in the axial direction with respect to the fan 80b. Therefore, the fan 80b blows out the sucked air outward in the radial direction.

  For example, when the mode door 84d opens the foot outlet opening 64d, the air flow blown from the fan 80b is directed from the foot outlet opening 64d toward the driver's lower body through the FOOT duct 7d and the foot outlet 8d. Can be blown out. When the mode door 84e opens the foot blowout opening 64e, the airflow blown from the fan 80b is blown from the foot blowout opening 64e through the FOOT duct 7e and the foot blowout port 8e toward the passenger's lower body. be able to.

  According to the present embodiment described above, the air conditioning unit 10 of the vehicle air conditioner includes the heater unit 20 and the blower unit 30. The heater unit 20 includes a heater case 21, a cooling heat exchanger 42 disposed in the heater case 21 for exchanging heat between the air flow and the refrigerant, and an air flow and engine cooling water disposed in the heater case 21. And a heater core 44 for heat exchange. The blower unit 30 has air passages 61a and 61b through which an air flow blown from the air outlets 28a and 28b of the heater case 21 circulates, and a blow-off opening that blows the air flow that has passed through the air passages 61a and 61b into the vehicle interior. 64a, 64b,... 64e, and a blower case 60. The blower unit 30 is disposed in the blower case 60, and includes fans 80a and 80b that suck the air flow in the air passages 61a and 61b and blow out the air flow from the blowing openings 64a, 64b,. The blower case 60 is supported by the reinforcing member (beam member) 5. The reinforcing member 5 is formed so as to extend in the vehicle width direction, and both ends in the longitudinal direction are fixed to the chassis 6a and 6b of the vehicle, respectively. The vehicle width direction center portion (vehicle left-right direction center portion) S2 of the blower case 60 of the blower unit 30 is offset to the vehicle width direction driver seat side with respect to the vehicle width direction center portion S1 of the reinforcing member 5. It is characterized by.

  Accordingly, the blower case 60 is attached to a portion of the reinforcing member 5 where the amplitude of vibration of the reinforcing member 5 is smaller than that of the central portion S1 in the vehicle width direction. Therefore, it is possible to suppress the reinforcing member 5 from vibrating due to the vibrations of the fans 80a and 80b, thereby suppressing the steering 7 and the instrument panel 3 in the vehicle interior from shaking and giving the passenger an uncomfortable feeling. Can do.

  In the present embodiment, the face blowing openings 64a and 64b are arranged adjacent to each other. The rotation shaft 81 is disposed offset to the right side (that is, the driver's seat side) with respect to the vehicle center portion S1 'in the left-right direction.

  For example, as shown in the comparative example of FIG. 5, when the rotation shaft 81 is located in the left and right center part S1 ′ of the vehicle, the air volume blown from the fan 80a through the face blowing opening 64b is It becomes larger than the air volume blown out through the blowout opening 64a. This is because the face blowing opening 64b is located on the front side in the rotation direction of the rotation shaft 81 with respect to the face blowing opening 64a.

  Therefore, in order to make the airflows blown from the face outlets 8a and 8b close to each other, it is necessary to generate a pressure loss in the air flow in the FACE duct 7b. In other words, in order to bring the blown air blown out from the face outlets 8a and 8b closer to each other, it is necessary to provide a bent part in the FACE duct 7b or to add a loss body to the FACE duct 7b that generates pressure loss in the air flow. become. For this reason, noise is generated when an air flow flows through the FACE duct 7b.

  On the other hand, in the present embodiment, as described above, the rotation shaft 81 is disposed offset to the right side with respect to the center portion S1 'in the left-right direction of the vehicle. The FACE duct 7a on the driver seat side can be shortened, and the FACE duct 7b on the passenger seat side can be lengthened. That is, the pressure loss of the FACE duct 7a on the driver seat side can be reduced, and the pressure loss of the FACE duct 7b on the passenger seat side can be increased. Thereby, the ventilation volume blown from the face blower outlets 8a and 8b can be closely approached, without providing a bending part and a loss body in the FACE duct 7b.

  Further, the same effects as those of the face outlets 8a and 8b can be obtained at the foot outlets 8d and 8e.

  In the present embodiment, as described above, the rotation shaft 81 is disposed offset to the right side with respect to the center portion S1 'in the left-right direction of the vehicle. As a result, the defroster outlet 64c is offset to the driver's seat side with respect to the lateral center S1 'of the vehicle. For this reason, the air quantity which blows off from the defroster blower outlet to the driver's seat side among windshield inner surfaces can be increased. For this reason, the visibility ahead of the vehicle through the windshield can be improved.

  In general, as shown in FIG. 6, the firewall 4 is provided with a through hole 9 for allowing the hot water pipe and the refrigerant pipe to pass through between the vehicle interior and the engine room (the vehicle exterior space in front of the vehicle). Yes. The through hole 9 is disposed in the center portion of the firewall 4 in the vehicle width direction. This is because the parts constituting the vehicle are made common even though the mounting position of the steering wheel 7 is either the left or right position.

  In the present embodiment, the center portion S <b> 2 in the vehicle width direction of the blower case 60 is disposed offset from the center portion S <b> 1 in the vehicle width direction of the reinforcing member 5. For this reason, compared with the comparative example (refer FIG. 7) which arrange | positions the center part S2 of the vehicle width direction of the blower case 60 in the left-right direction center part S1 ', refer to the heat exchanger 42 for cooling, the heater core 44, and the through-hole 9. The distance between can be shortened. Therefore, the refrigerant pipe 42a connected to the cooling heat exchanger 42 and the hot water pipe (not shown) connected to the heater core 44 can be shortened. 5 and 6 illustrate the cooling heat exchanger 42 in the heater unit 20, and the heater core 44 is not illustrated.

(Second Embodiment)
In the first embodiment, the example in which the vehicle width direction central portion S2 of the blower case 60 is offset toward the driver's seat side with respect to the vehicle width direction central portion S1 of the reinforcing member 5 has been described. As shown, the vehicle width direction center portion S2 of the blower case 60 may be offset to the vehicle width direction passenger seat side with respect to the vehicle width direction center portion S1 of the reinforcing member 5. 8, the same reference numerals as those in FIG. 1 denote the same components, and the description thereof is omitted. Also in this case, in the present embodiment, as described above, the rotation shaft 81 may be disposed offset to the left side with respect to the center portion S1 ′ in the left-right direction of the vehicle.

(Other embodiments)
In the first and second embodiments, the example in which the reinforcing member 5 is used as the beam member of the present invention has been described. However, instead of this, the firewall 4 may be used as the beam member of the present invention. In this case, the blower case 60 is fixed to the firewall 4 (see FIG. 9). It is necessary to fix the right side of the firewall 4 in the vehicle width direction to the chassis 6a and the left side of the firewall 4 in the vehicle width direction to the chassis 6b. In this case, the center portion S2 in the vehicle width direction of the blower case 60 may be arranged offset to the driver seat side with respect to the center portion of the firewall 4 in the vehicle width direction. Alternatively, the center portion S2 in the vehicle width direction of the blower case 60 may be arranged offset to the passenger seat side with respect to the center portion of the firewall 4 in the vehicle width direction.

  Moreover, you may use both the reinforcement member 5 and the firewall 4 as a beam member of this invention. In this case, the blower case 60 is fixed to each of the reinforcing member 5 and the firewall 4.

  In this case, the center portion S2 in the vehicle width direction of the blower case 60 is offset toward the driver's seat with respect to the center portion in the vehicle width direction of the firewall 4 and the center portion S1 of the reinforcing member 5 in the vehicle width direction. May be arranged. Alternatively, the center portion S2 in the vehicle width direction of the blower case 60 is offset to the passenger seat side with respect to the center portion in the vehicle width direction of the firewall 4 and the center portion S1 of the reinforcing member 5 in the vehicle width direction. May be arranged.

  In the first and second embodiments, the example used in the heater unit 20 including the cooling heat exchanger 42 and the heater core 44 has been described. However, instead of the cooling heat exchanger 42 and the heater core 44, Either one may be used for the heater unit 20.

  In addition, this invention is not limited to above-described embodiment, In the range described in the claim, it can change suitably. Further, the above embodiments are not irrelevant to each other, and can be combined as appropriate unless the combination is clearly impossible. In each of the above-described embodiments, it is needless to say that elements constituting the embodiment are not necessarily essential unless explicitly stated as essential and clearly considered essential in principle. Yes.

  Next, the correspondence between the claims of the present invention and the components of this embodiment will be described.

  First, the heat exchange case corresponds to the heater case 21, the heat exchanger corresponds to the cooling heat exchanger 42 and the heater core 44, the air passage corresponds to the upper air passage 61a and the lower air passage 61b, and the blowout opening portion. Corresponds to the face outlet openings 64a and 64b, the defroster outlet opening 65c, and the foot outlet openings 64d and 64e. The beam member corresponds to the firewall 4 or the reinforcing member 5.

4 Firewall 5 Reinforcement member 6a, 6b Chassis 10 Air conditioning unit 20 Heater unit (heat exchange unit)
21 Heater case 30 Blower unit 42 Heat exchanger for cooling 44 Heater core 48a, 48b Air mix door 60 Blower case 80a, 80b Fan

Claims (5)

A heat exchange unit (20) comprising a heat exchange case (21) for circulating an air flow, and a heat exchanger (42, 44) disposed in the heat exchange case and exchanging heat with the air flow; ,
A blower case (60) provided with blow-off openings (64a to 64e) for blowing the air flow blown from the heat exchange case into a vehicle compartment, and the blower case (60) disposed in the blower case and blown from the heat exchange case. A blower unit (30) provided with fans (80a, 80b) for blowing the air flow into the vehicle compartment from the blowing opening as the air flows,
The blower case is supported by beam members (4, 5) which are formed to extend in the vehicle width direction and are fixed to the vehicle chassis (6a, 6b) at both ends in the longitudinal direction.
A vehicle air conditioner characterized in that a vehicle width direction center portion of the blower case is offset with respect to a vehicle width direction center portion of the beam member.   2. The vehicle air conditioner according to claim 1, wherein a vehicle width direction center portion of the blower case is offset toward a vehicle width direction driver seat side with respect to a vehicle width direction center portion of the beam member. .   The vehicle air conditioner according to claim 1, wherein a center portion in the vehicle width direction of the blower case is offset toward a passenger seat side in the vehicle width direction with respect to the center portion in the width direction of the beam member. . The fan is supported by a rotating shaft, and rotates together with the rotating shaft so as to suck the air flow blown from the heat exchange case and blow it out from the blowing opening into the vehicle interior. And
The vehicle air conditioner according to any one of claims 1 to 3, wherein the rotation shaft is offset with respect to a center portion in a vehicle width direction of the vehicle.   The beam member includes a firewall (4) disposed in front of the vehicle interior to isolate the interior of the vehicle interior from the exterior of the vehicle interior, and a reinforcement member (5) for reinforcing the chassis of the vehicle. The vehicle air conditioner according to any one of claims 1 to 4, wherein the vehicle air conditioner is at least one of them.

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