WO2016157775A1

WO2016157775A1 - Vehicle air conditioner

Info

Publication number: WO2016157775A1
Application number: PCT/JP2016/001472
Authority: WO
Inventors: 洋平霜山; 裕貴渡部; 忠則坂倉
Original assignee: 株式会社デンソー
Priority date: 2015-03-30
Filing date: 2016-03-15
Publication date: 2016-10-06
Also published as: JP6532728B2; JP2016188020A; CN107074070A; CN107074070B

Abstract

This vehicle air conditioner is provided with a blower (21), a cooling heat exchanger (24), and an air-conditioning unit (10). The blower blows air. The cooling heat exchanger is positioned behind the blower in the longitudinal direction of the vehicle. The air-conditioning unit is arranged inside of a center console (1) so as to extend in the longitudinal direction. The cooling heat exchanger is disposed with the upper end portion tilted forward and up. The air-conditioning unit comprises an outlet port (21d), a front air passage (27), and a water discharge unit (28). Air from the blower is blown through the outlet port backward and up towards the cooling heat exchanger. The front air passage guides air from the outlet port to the cooling heat exchanger. The water discharge unit is disposed below the cooling heat exchanger. The front air passage comprises a front bottom surface portion (27a) which is inclined back and down towards the water discharge unit. The front edge (27d) of the front bottom surface portion is positioned forwards of the front edge of the cooling heat exchanger in the longitudinal direction.

Description

Air conditioner for vehicles

Cross-reference of related applications

This application is based on Japanese Patent Application No. 2015-068918 filed on March 30, 2015, the disclosure of which is incorporated into this application by reference.

The present disclosure relates to a vehicle air conditioner, and more particularly, to a rear seat air conditioner provided in a center console of a passenger compartment.

Vehicles such as automobiles are equipped with an air conditioning unit in the instrument panel in front of the vehicle in order to adjust the temperature in the passenger compartment. This air-conditioning unit is generally provided in an instrument panel as cool air, warm air, or a mixed air of these by cooling or heating air taken in by a blower driven by a motor by a heat exchanger such as an evaporator or a heater core. It is comprised so that it may ventilate into a vehicle interior from an air outlet.

On the other hand, in recent years, vehicles having a large vehicle body such as SUV (Sport Utility Vehicle) have been widely used. Such a vehicle has a large indoor space, so it is difficult to reach the rear seats with air conditioning.

In this regard, for example, Patent Document 1 discloses an air conditioner in which an end portion of a rear seat air conditioning duct is connected between an evaporator and a heater core of an air conditioning unit in an instrument panel. In this air conditioner, the cool air before passing through the heater core is guided to the rear seat via the rear air conditioning fan so that the rear seat can be efficiently cooled. Further, for example, Patent Document 2 discloses an air conditioning unit in which an evaporator is arranged in a substantially vertical shape. Patent Document 2 devises a position where a passage to a vehicular refrigerated warehouse is opened, A technique for reducing the size of an air conditioning unit in an instrument panel is disclosed.

JP 2008-081024 A JP 2006-088842 A

However, according to studies by the inventors of the present disclosure, in the air conditioner disclosed in Patent Document 1, the heat exchanger of the air conditioning unit in the instrument panel is shared by the front seat and the rear seat. In general, the larger the size of the heat exchanger, the higher the cooling or heating capability. Therefore, in an air conditioning unit having a heat exchanger of a size that can be placed in a limited space in the instrument panel, the case of a vehicle with a large body such as an SUV Therefore, it is difficult to sufficiently adjust the temperature of the conditioned air to the rear seat.

In such a case, in order to sufficiently adjust the temperature of the conditioned air to the rear seat, the rear seat with a heat exchanger is provided separately from the air conditioning unit disposed in the instrument panel. It is conceivable to provide the air conditioning unit in a center console that extends from the instrument panel to the rear of the vehicle.

However, in general, the center console is sandwiched between the left and right seats, the center tunnel rises upward on the lower vehicle body floor, and various items such as shift levers, switches, storage compartments, armrests, etc. are attached to the upper surface. Yes. Therefore, simply disposing the air conditioning unit in the center console may increase the size of the center console that accommodates the air conditioning unit and reduce the comfort of the passenger compartment.

Therefore, it is necessary to accommodate the air conditioning unit in the center console in a compact manner. However, in the air conditioning unit disclosed in Patent Document 2, since the evaporator is arranged substantially vertically, the size of the evaporator is limited to the height of the space in the center console, and the cooling performance may be reduced. .

In order to prevent the cooling performance from deteriorating, it is also conceivable to arrange the evaporator at an inclination to reduce the height dimension. However, since condensed water can drip not only directly below the lower end portion of the evaporator but also from the upper end portion, there is a possibility that the condensed water from the upper end portion cannot be drained by simply placing the evaporator at an inclination.

Therefore, the present disclosure aims to provide a vehicle air conditioner including an air conditioning unit capable of reliably draining condensed water dripping from any part of the evaporator without lowering the cooling performance of the evaporator. To do.

The vehicle air conditioner of the present disclosure includes a blower, a cooling heat exchanger, and an air conditioning unit. The blower blows air. The cooling heat exchanger is located behind the blower in the longitudinal direction of the vehicle. The air conditioning unit is disposed in the center console so as to extend in the front-rear direction. The cooling heat exchanger is provided such that the upper end of the cooling heat exchanger is inclined forward and upward. The air conditioning unit has a blowout port, a front ventilation path, and a drainage part. The air outlet blows out the air blown from the blower rearward and upward to the cooling heat exchanger. A front ventilation path guides air from a blower outlet to the heat exchanger for cooling. The drainage part is provided below the cooling heat exchanger. The front ventilation path has a front lower surface portion that is inclined rearward and downward toward the drainage portion. The front end of the front lower surface portion is located in front of the front end of the cooling heat exchanger in the front-rear direction.

According to the present disclosure, since the upper end portion of the cooling heat exchanger is inclined forward and upward, the larger size and higher cooling capacity cooling heat exchange is provided in the center console that is restricted in the height direction. A vessel can be provided. Moreover, since it has a blower outlet that blows out air from the blower to the cooling heat exchanger toward the rear upper side, the flow direction of the main flow of the air blown out from this blower outlet is the direction perpendicular to the surface of the cooling heat exchanger. The airflow resistance in the cooling heat exchanger can be reduced. Furthermore, since the front ventilation path has a front lower surface portion that is inclined rearward and downward toward the drainage portion, air can flow through the entire cooling heat exchanger. In addition, since the front end of the front lower surface portion is located in front of the front end of the cooling heat exchanger in the front-rear direction, even when the cooling heat exchanger is inclined and disposed, Condensed water dripping from the upper end of the heat exchanger can also be drained reliably.

The above and other objects, features, and advantages of the present disclosure will become more apparent from the following detailed description with reference to the accompanying drawings.
It is a perspective view of the center console provided with the vehicle air conditioner concerning one embodiment of this indication. It is a longitudinal cross-sectional view in the front-back direction of the vehicle of the center console shown in FIG. It is a longitudinal cross-sectional view of the front-back direction which shows a part of air conditioning unit shown in FIG. It is a right view of the air conditioning unit shown in FIG. It is a top view of the air conditioning unit shown in FIG. It is a bottom view of the air conditioning unit shown in FIG. It is a top view of the vehicle body floor surface under the air conditioning unit shown in FIG.

Hereinafter, an embodiment of a vehicle air conditioner to which the present disclosure is applied will be described with reference to the drawings. It should be noted that arrows F and R appropriately shown in the figure indicate the forward direction and the backward direction of the vehicle, respectively.

The vehicle air conditioner of the present embodiment is provided in a center console in a passenger compartment of a passenger car such as an FR (front engine-rear drive) vehicle or a four-wheel drive vehicle. The structure of the center console is shown in FIG. Show.

A center console 1 extending from the lower part of the front dashboard (not shown) toward the rear (arrow R in the figure) is provided in the passenger compartment so as to separate the left and right front driver's seats from the passenger seat (not shown). It has been.

In the case of the present embodiment, as shown in FIG. 1, a center tunnel 3 is provided with a convex shape on the upper side at the center of the vehicle body floor surface 2 in the width direction of the vehicle. The center tunnel 3 accommodates a propeller shaft, an exhaust pipe, and the like (not shown) extending in the front-rear direction. The center console 1 is provided above the center tunnel 3 along the center tunnel 3.

The center console 1 is a box-shaped storage portion that opens downward and has a space between the top surface of the center tunnel 3.

A shift lever portion 4a of the shift device 4 capable of performing a gear shifting operation of the vehicle is provided in a protruding manner in front of the upper surface of the center console 1 (direction indicated by an arrow F). An operation switch 5 for operating a vehicle-mounted device such as navigation is mounted behind the shift lever portion 4a.

Further, on the upper surface of the center console 1, two cup holders 6 arranged in the width direction (left-right direction) of the vehicle storing cups, bottles and the like are integrally formed behind the operation switch 5.

Further, on the upper surface of the center console 1, behind the cup holder 6, there is provided an accessory case 7 for a front seat for storing accessories. The accessory case 7 includes a storage portion 7a and an opening / closing lid 7b. The storage portion 7a is integrally formed on the upper surface of the center console 1 and opens upward. The open / close lid 7b is hinged to the center console 1 and opens / closes the opening of the storage portion 7a. The open / close lid 7b is configured so that the upper surface portion of the open / close lid 7b serves as an armrest for a front seat occupant seated in a driver seat or a passenger seat. 1 and 2 show the open / close lid 7b in a closed state.

Furthermore, a rear air conditioning switch 8 is mounted above the back of the center console 1 behind the accessory case 7. A rear air conditioning unit 10 which is an air conditioning unit for a rear seat, which will be described later, is operated by a rear seat passenger operating the rear air conditioning switch 8. Below the air conditioning switch 8, there is provided a discharge port 9 through which air (air conditioned air) from the rear air conditioning unit 10 is discharged into the passenger compartment.

As shown in FIG. 2, a rear air conditioning unit 10 and

air conditioning ducts

11 and 12 are provided in the center console 1 described above. The rear air conditioning unit 10 is provided on the upper surface of the center tunnel 3 provided on the vehicle body floor surface 2 so as to extend in the front-rear direction. The

air conditioning ducts

11 and 12 guide the air from the rear air conditioning unit 10 to the rear.

The rear air conditioning unit 10 includes a unit main body 20 constituting a part thereof. The unit main body 20 includes an air blower 20a, an air conditioning unit 20b, and a discharge unit 20c that are integrally formed. The air blower 20a blows air taken from the passenger compartment downstream. The air conditioning unit 20b cools or heats the air blown from the blower unit 20a, thereby producing conditioned air that is cold air, warm air, or a mixed air thereof. The discharge unit 20c discharges the conditioned air to the rear seat.

The shift device 4 is supported by a pedestal portion 13 provided on the center tunnel 3 below and is fixed to the vehicle body floor surface 2 via the pedestal portion 13. In the space below the pedestal 13, the blower 20 a of the rear air conditioning unit 10 is accommodated.

Next, the internal structure of the rear air conditioning unit 10 will be described in detail with reference to FIG. FIG. 3 is a sectional view taken along line III-III of the rear air conditioning unit 10 of FIG.

As shown in FIG. 3, the rear air conditioning unit 10 includes a blower 21 and a blower motor 22 that rotationally drives the blower 21. The blower 21 and the blower motor 22 are disposed in the air blowing unit 20 a located in the front of the rear air conditioning unit 10. The blower 21 and the blower motor 22 are provided to face each other in the width direction. In the following description, in the width direction, the side on which the blower 21 is provided is referred to as “blower side”, and the side opposite to the blower side and on which the blower motor 22 is provided is referred to as “motor side”.

The blower 21 includes a centrifugal fan 21a and a scroll case 21b. Centrifugal fan 21a has a plurality of fins arranged in the circumferential direction, and rotates around a rotation axis extending in the width direction to push out air in the radial direction by the rotation of the plurality of fins. The scroll case 21b has a spiral shape and covers the outer periphery and one side surface of the centrifugal fan 21a.

The scroll case 21b has an inlet 21c and an outlet 21d. The suction port 21c is located at the center of the side surface on the blower side of the scroll case 21b, and sucks air from the passenger compartment into the rear air conditioning unit 10. The air outlet 21d is located rearward and lower than the rotation shaft, and blows air upward and rearward. In other words, the air outlet 21d is located below the blower 21. The scroll case 21b is formed such that the cross-sectional area of the flow path between the inner periphery and the outer periphery of the centrifugal fan 21a is gradually enlarged from the winding start portion p to the winding end portion q of the scroll case 21b. Yes.

The blower motor 22 is attached to the back surface of the scroll case 21b of the blower 21. The blower motor 22 includes an output shaft (not shown) arranged coaxially with the rotation shaft of the centrifugal fan 21a. The output shaft is inserted through the back of the scroll case 21b so as to transmit the rotational torque to the centrifugal fan 21a, and is connected to the rotational shaft of the centrifugal fan 21a. The blower motor 22 has a substantially cylindrical outer shape, and has an outer diameter smaller than the outer diameter of the scroll case 21 b of the blower 21. Further, the blower motor 22 is configured to be able to control its rotational speed in accordance with the air volume operation of the air conditioning switch 8.

The rear air conditioning unit 10 includes an expansion valve (expansion valve block) 23 and an evaporator (cooling heat exchanger) 24. The expansion valve 23 injects the liquid refrigerant in a mist toward the air conditioning unit 20b behind the blower unit 20a. The evaporator 24 cools the air with the heat of vaporization of the refrigerant sprayed in a mist form by the expansion valve 23.

The upper end 24a of the evaporator 24 is inclined forward and upward. That is, the evaporator 24 is inclined in the front-rear direction so that the upper end portion 24a is closer to the upstream side (indicated by the arrow F) in the air flow direction and the lower end portion 24b is closer to the downstream side in the air flow direction (backward as indicated by the arrow R). Placed in a different posture.

The upper tank 24 and the lower tank 24b are respectively provided with an upper tank and a lower tank. Between the upper side tank and the lower side tank, there are provided a plurality of tubes (not shown) in which the refrigerant flows inside and a plurality of fins (not shown) are joined to the outer surface. The upper tank and the lower tank distribute (divide) the refrigerant flowing into the evaporator 24 into a plurality of tubes. The evaporator 24 is configured such that the air flowing between the plurality of fins is cooled by the refrigerant that evaporates in the plurality of tubes.

A refrigerant supply pipe 25 and a refrigerant discharge pipe 26 are connected to the expansion valve 23. The refrigerant supply pipe 25 supplies the expansion valve 23 with liquid refrigerant that is compressed and discharged at a high temperature and high pressure in a compressor (not shown). The refrigerant discharge pipe 26 discharges the refrigerant in the expansion valve 23. Further, the evaporator 24 has an inlet and an outlet of the refrigerant flow path connected to the expansion valve 23 via connection pipes (refrigerant pipes) 23a and 23b, respectively. In other words, the connecting

pipes

23 a and 23 b are provided in the front ventilation path 27 and are connected to both the evaporator 24 and the expansion valve 23.

According to the above-described configuration, the liquid refrigerant supplied from the compressor to the expansion valve 23 via the refrigerant supply pipe 25 is sprayed in a mist form by the expansion valve 23 and supplied to the evaporator 24 via the connection pipe 23a. The atomized refrigerant supplied to the evaporator 24 is vaporized by exchanging heat with air in a plurality of tubes. The gas refrigerant vaporized in the plurality of tubes of the evaporator 24 is returned to the compressor via the connection pipe 23b and the refrigerant discharge pipe 26. The gas refrigerant returned to the compressor is compressed to high temperature and high pressure by the compressor, cooled and liquefied by a condenser (not shown), and temporarily stored in a receiver (not shown). The stored liquid refrigerant is supplied again from the receiver to the expansion valve 23 and the evaporator 24.

The rear air conditioning unit 10 is formed in front of the evaporator 24 (upstream in the air flow direction), and has a front ventilation path 27 that guides the air blown from the air outlet 21d of the scroll case 21b to the evaporator 24. . The front ventilation path 27 has a front lower surface portion 27 a (a rear lower inclined lower surface portion) that is inclined rearward and downward toward a drain (drainage portion) 28 provided below the rear end portion of the evaporator 24. . The front lower surface portion 27 a is configured such that the front end of the front lower surface portion 27 a is positioned in front of the evaporator 24. As a result, the water droplets that adhere to the fins of the evaporator 24 and eventually drip are reliably discharged from the drain 28 to the outside of the vehicle compartment through the front lower surface portion 27a. Moreover, the front lower surface part 27a is comprised so that it may continue via the ridgeline with the lower surface part of the blower outlet 21d provided in the back upper inclination.

Further, the expansion valve 23 is provided in the front ventilation path 27 and connected to the evaporator 24. The front end 27 d of the front lower surface portion 27 a is located in front of the lower end portion 23 c of the front surface of the expansion valve 23. As a result, the water droplets that adhere to the expansion valve 23 and eventually drop are reliably discharged from the drain 28 to the outside of the vehicle compartment through the front lower surface portion 27a.

Similarly, the connecting

pipes

23a and 23b, the refrigerant supply pipe 25, and the refrigerant discharge pipe 26 are provided in the front ventilation path 27 and are arranged so as to extend from the expansion valve 23 to the side or the rear of the vehicle. As a result, water droplets that adhere to the

connection pipes

23a and 23b, the refrigerant supply pipe 25, and the refrigerant discharge pipe 26 and eventually drop are reliably discharged from the drain 28 to the outside of the vehicle compartment through the front lower surface portion 27a.

As shown in FIG. 5, the front ventilation path 27 is provided such that the motor side surface 27 b expands from the blower 21 toward the evaporator 24 toward the motor side. Further, the front ventilation path 27 has a front upper surface portion 27c (inclined upper surface portion) that is inclined rearward and upward. The front upper surface portion 27 c is directed to the lower end of a tank (upper tank portion) provided at the upper end portion 24 a of the evaporator 24. In other words, the front upper surface portion 27 c extends toward the lower end portion of the upper tank portion provided at the upper end portion 24 a of the evaporator 24.

The rear air conditioning unit 10 has a rear ventilation path 29 that guides air cooled by the evaporator 24 to an air mix door 34 described later, behind the evaporator 24. As shown in FIG. 5, the blower-side side surface 29 a of the rear ventilation path 29 is offset from the blower-side side face 27 b of the front ventilation path 27 toward the motor side.

The rear ventilation path 29 has a rear lower surface portion 29b (rear upper inclined lower surface portion) inclined rearward and upward. The upper end of the back lower surface part 29b is located below the extended surface L of the lower surface part of the blower outlet 21d. Further, the rear ventilation path 29 has an upper surface portion 29 c that is inclined rearward and downward from the upper end portion 24 a of the evaporator 24 toward the air mix door 34.

The rear air conditioning unit 10 includes a heater core 30 as a heat exchanger for heating on the downstream side of the evaporator 24. The heater core 30 reheats the air by exchanging heat between the engine coolant that flows through the heater core 30 and the air that has passed through the evaporator 24.

A water supply pipe 31 and a drain pipe 32 are connected to the heater core 30. The water supply pipe 31 supplies the engine cooling water heated by an engine (not shown) to warm water to the heater core 30. The drain pipe 32 discharges the engine coolant used for heating the air from the heater core 30 to the radiator side.

In the rear air conditioning unit 10, a bypass passage 33 is formed above the heater core 30 to bypass the heater core 30 and guide the air downstream.

The rear air conditioning unit 10 includes an air mix door 34 that adjusts the flow rate ratio between the flow rate of hot air that passes through the heater core 30 and the flow rate of cool air that bypasses the heater core 30 and passes through the bypass passage 33. Yes.

The air mix door 34 is a flat plate-type rotary door that can rotate around a shaft 34a extending in the width direction within a predetermined angle range, and the flow rate ratio can be changed according to the angle. As shown in FIG. 3, when the air mix door 34 faces the angle a, the flow rate ratio of the warm air heated through the heater core 30 is maximized, and when the air mix door 34 faces the angle b, the cool air passing through the bypass passage 33 The flow rate ratio is maximized. Further, when the air mix door 34 faces a substantially horizontal angle c, the front end of the turning locus of the air mix door 34 indicated by a broken line in FIG. 3 is located in front of the lower end portion 24 b of the evaporator 24. Furthermore, when the air mix door 34 is turned to the angle b, that is, when it is rotated downward, the air mix door 34 is directed to the upper end of the tank on the lower side of the evaporator 24.

As shown in FIG. 4, the air mix door 34 is rotated at a desired angle by a drive mechanism 35 disposed on the side surface on the blower side behind the evaporator 24 in the rear air conditioning unit 10. The drive mechanism 35 is configured such that the rotation angle can be controlled in accordance with the temperature set by operating the air conditioning switch 8.

The rear air conditioning unit 10 includes an upper discharge port 36, a lower discharge port 37, and a mode door 38 in a discharge unit 20c formed downstream of the air conditioning unit 20b. The upper discharge port 36 discharges the conditioned air upward to the rear seat. The lower discharge port 37 discharges the conditioned air below the rear seat. The mode door 38 changes the flow rate ratio between the conditioned air discharged from the upper discharge port 36 and the conditioned air discharged from the lower discharge port 37.

The mode door 38 is a flat-plate-type rotary door that can rotate around a shaft 38a in the width direction, and the flow rate ratio can be changed according to the angle. As shown in FIG. 3, when the mode door 38 faces the angle d, the flow rate (flow rate ratio) of the conditioned air discharged from the upper discharge port 36 is maximized, and when the mode door 38 faces the angle e, the air is discharged from the lower discharge port 37. The flow rate (flow rate ratio) of the conditioned air is maximized.

As shown in FIG. 4, the mode door 38 is rotated at a desired angle by a drive mechanism 39 disposed on the side surface on the blower side behind the evaporator 24 in the rear air conditioning unit 10. The drive mechanism 39 controls the rotation angle of the mode door 38 according to the switching operation of the discharge mode such as the face mode blowing from the upper discharge port 36 and the foot mode blowing from the lower discharge port 37 in the air conditioning switch 8. It is configured.

As shown in FIG. 6, the unit main body 20 of the rear air conditioning unit 10 includes a sheet-like seal member 45 made of an elastic member such as urethane on the bottom surface 20e. The seal member 45 is formed with a plurality of through holes 45a to 45d into which the

various pipes

25, 26, 28, 31, 32 are inserted.

Here, the upper surface of the center tunnel 3 on the vehicle body floor surface 2 will be described with reference to FIG.

As shown in FIG. 7, on the upper surface of the center tunnel 3, the seal surface portion 3a facing the seal member 45 of the rear air conditioning unit 10 is provided with a plurality of openings 3b to 3e that are opened outside the passenger compartment. The

various pipes

25, 26, 28, 31, 32 extend outside the vehicle compartment through these openings 3b-3e.

Further, since the evaporator 24 is disposed at an inclination, an increase in the height of the rear air conditioning unit 10 can be suppressed even if the evaporator 24 is enlarged in order to increase the cooling capacity.

Next, the air flow path in the rear air conditioning unit 10 will be described with reference to FIG.

When the blower 21 is driven by the rotation of the blower motor 22, the air in the passenger compartment is sucked from the suction port 21c of the blower 21 and is pumped from the inside of the scroll case 21b to the front ventilation path 27 through the outlet 21d. The air pressure-fed to the front ventilation path 27 is cooled by heat exchange with the refrigerant when passing through the evaporator 24.

At this time, when warm air sucked into the rear air conditioning unit 10 hits the fins of the evaporator 24 and is cooled below the dew point temperature, moisture in the air is condensed and water droplets adhere to the fins of the evaporator 24. The water droplets adhering to the fins eventually drop or flow down below the fins, and are discharged from the drain 28 to the outside of the passenger compartment through the front lower surface portion 27a of the front ventilation path 27.

The cooled air is distributed to the bypass passage 33 side or the heater core 30 side or both sides by the air mix door 34. The air distributed to the heater core 30 side is reheated by the heater core 30. The cool air that has passed through the bypass passage 33, the warm air that has passed through the heater core 30, or the mixed air in which these air has been mixed is directed from the at least one

discharge port

36, 37 selected by the mode door 38 toward the rear seat in the vehicle interior. Discharged.

As described above, according to the present embodiment, the evaporator 24 is provided with the upper end portion 24a inclined forward and upward, so that the evaporator 24 is larger and cooled in the center console 1 having a restriction in the height direction. An evaporator 24 having a high capacity can be provided. Moreover, according to this embodiment, it has the blower outlet 21d which blows off air toward back upper direction from the blower 21 to the evaporator 24. As shown in FIG. As a result, the air blown out from the air outlet 21d has its main flow direction directed to the direction perpendicular to the surface of the evaporator 24, and the ventilation resistance at the evaporator 24 can be reduced. Further, the front ventilation path 27 has a front lower surface portion 27 a that is inclined rearward and downward toward the drain 28. The front end of the front lower surface portion 27 a is located in front of the vehicle with respect to the front end of the evaporator 24. As a result, air can flow through the entire evaporator 24, and even when the evaporator 24 is inclined, the condensed water dripping from the upper end portion 24 a of the evaporator 24 by the front lower surface portion 27 a is surely drained. can do.

Further, according to the present embodiment, the drain 28 is provided below the lower end 24 b of the evaporator 24. As a result, the rear air conditioning unit 10 can be compactly arranged in the center console 1 in the front-rear direction. In other words, the mounting space in the front-rear direction of the rear air conditioning unit 10 in the center console 1 can be reduced.

Moreover, according to this embodiment, the blower outlet 21d is formed in the back lower part of the blower 21. FIG. As a result, the air can be blown in the direction perpendicular to the evaporator 24, and the air conditioning performance in the evaporator 24 can be ensured.

Moreover, according to this embodiment, the front lower surface part 27a is continuing via the ridgeline with the lower surface part of the blower outlet 21d provided inclining back and upward. As a result, the main flow of the air blown out from the outlet 21d can easily be directed in a direction parallel to the lower surface portion, and air entrainment in the vicinity of the front lower surface portion 27a of the front ventilation path 27 can be reduced. Therefore, the ventilation resistance in the front ventilation path 27 can be reduced.

Moreover, according to this embodiment, the rear ventilation path 29 has the back lower surface part 29b which inclines back upwards, and the upper end is located below the extension surface L of the lower surface part of the blower outlet 21d. As a result, the airflow resistance of the air passing through the evaporator 24 can be reduced, and the air conditioning performance in the evaporator 24 can be ensured.

Further, according to the present embodiment, the front ventilation path 27 has the front upper surface portion 27 c inclined rearward and upward, and the front upper surface portion 27 c extends toward the lower end portion of the upper tank portion provided in the evaporator 24. ing. As a result, the air guided by the front ventilation path 27 can pass through the entire evaporator 24, and the air conditioning performance in the evaporator 24 can be ensured.

Further, according to the present embodiment, the expansion valve 23 is provided in the front ventilation path 27, and the front end 27 d of the front lower surface portion 27 a is located in front of the vehicle from the front lower end portion 23 c of the expansion valve 23. As a result, water droplets that adhere to the expansion valve 23 and eventually drip can be surely discharged from the drain 28 to the outside of the passenger compartment through the front lower surface portion 27a.

Further, according to the present embodiment, the connecting

pipes

23a, 23b, the refrigerant supply pipe 25, and the refrigerant discharge pipe 26 are provided in the front ventilation path 27, and these pipes (refrigerant pipes) 23a, 23b, 25, 26 are The expansion valve 23 is disposed so as to extend laterally or rearward of the vehicle. As a result, water droplets that adhere to these

pipes

23a, 23b, 25, and 26 and eventually drop can be reliably discharged from the drain 28 to the outside of the passenger compartment through the front lower surface portion 27a.

(Other embodiments)
The present disclosure is not limited to the illustrated embodiments, and various improvements and design changes can be made without departing from the scope of the present disclosure.

For example, in the present embodiment, the vehicle air conditioner is mounted on a passenger car, but may be mounted on, for example, a construction machine vehicle, an agricultural machine vehicle, or the like.

Further, in the present embodiment, the rear air conditioning unit 10 performs air conditioning by taking in the air in the passenger compartment. However, the rear air conditioning unit 10 may perform air conditioning by taking in at least one of air inside or outside the vehicle.

As described above, according to the present disclosure, it is possible to provide a vehicle air conditioner including an air conditioning unit that can reliably drain the condensed water dripping from the evaporator without reducing the cooling performance of the evaporator. The present disclosure can be suitably used in the technical field of manufacturing a vehicle air conditioner or a vehicle equipped with the same.

Claims

A blower (21) for blowing air;
A cooling heat exchanger (24) located behind the blower in the longitudinal direction of the vehicle;
An air conditioning unit (10) disposed in the center console (1) so as to extend in the front-rear direction,
The cooling heat exchanger (24) is provided such that an upper end portion of the cooling heat exchanger (24) is inclined forward and upward,
The air conditioning unit (10)
An air outlet (21d) that blows out the air blown from the blower (21) to the cooling heat exchanger (24) rearward and upward,
A front ventilation path (27) for guiding air from the air outlet (21d) to the cooling heat exchanger (24);
A drainage part (28) provided below the cooling heat exchanger (24),
The front ventilation path (27) has a front lower surface part (27a) inclined rearward and downward toward the drainage part (28),
A vehicle air conditioner in which a front end (27d) of the front lower surface portion (27a) is positioned in front of the front end of the cooling heat exchanger (24) in the front-rear direction.
The vehicle air conditioner according to claim 1, wherein the drainage part (28) is provided below a rear end part of the cooling heat exchanger (24).
The blower (21) is provided so as to rotate around an axis extending in the width direction of the vehicle,
The said air outlet (21d) is a vehicle air conditioner of Claim 1 or Claim 2 currently formed in the back lower part of the said blower (21).
The said front lower surface part (27a) is following the lower surface part of the said blower outlet (21d) inclined and provided in back upper direction via the ridgeline, The any one of Claims 1-3. Vehicle air conditioner.
The air conditioning unit (10) has a rear ventilation path (29) for guiding air behind the cooling heat exchanger (24),
The rear ventilation passage (29) has a rear lower surface portion (29b) inclined rearward and upward,
5. The vehicle air conditioner according to claim 1, wherein an upper end of the rear lower surface portion (29 b) is located below an extended surface (L) of the lower surface portion of the air outlet (21 d). .
The front ventilation path (27) has a front upper surface part (27c) inclined rearward and upward,
The said front upper surface part (27c) is extended in any one of the Claims 1-5 extended toward the lower end part of the upper side tank part (24a) provided in the said heat exchanger for cooling (24). The vehicle air conditioner described in 1.
The air conditioning unit (10) is provided with an expansion valve block (23) connected to the cooling heat exchanger (24) in the front ventilation path (27),
The front end (27d) of the front lower surface portion (27a) is located in front of the lower end portion (23c) of the front surface of the expansion valve block (23) in the front-rear direction. The vehicle air conditioner according to Item.
In the air conditioning unit (10), refrigerant pipes (23a, 23b) connected to the cooling heat exchanger (24) and the expansion valve block (23) are provided in the front ventilation path (27). ,
The vehicle air conditioner according to claim 7, wherein the refrigerant pipe (23a, 23b) is disposed so as to extend laterally from the expansion valve block (23) or rearward in the front-rear direction.