JP2001171332A - Vehicle air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To use in common a part of a case of an air conditioning unit in both a right-hand drive vehicle and a left-hand drive vehicle in a vehicle air conditioner disposed with the air conditioning unit in a nearly central position in the vehicle lateral direction and a blower unit on the front passenger side. SOLUTION: This air conditioner adopts a control method by a hot water valve 27 as a temperature control method for blowoff air to dispense with a guide for equalizing a blowoff air temperature. A division part A of the air conditioning case 20 vertically dividing the case 20 is disposed below a heating heat exchanger 25 and above an air inlet port 211, while the air inlet port 211 differently positioned in the right-hand drive vehicle and the left-hand drive vehicle is formed in a lower case 21. Thereby, upper cases 22a, 22b can be used in common in the right-hand drive vehicle and the left-hand drive vehicle.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner for a vehicle in which an air conditioning unit is arranged at a center position of an instrument panel in a vehicle width direction and a blower unit is arranged on a passenger seat side. Regarding standardization for right-hand drive vehicles and left-hand drive vehicles.

[0002]

2. Description of the Related Art Japanese Unexamined Patent Publication No. Hei 9-123748 discloses that a cooling heat exchanger (evaporator of a refrigeration cycle) is disposed substantially horizontally in an air conditioning unit, and a heating heat exchanger is provided above the cooling heat exchanger. A vehicle air conditioner in which a heat exchanger (heater core) is disposed substantially horizontally and a blower is disposed beside an air conditioning unit is shown. In the conventional device described in this publication, the air blown from the blower is blown in a substantially horizontal direction (vehicle width direction) and blown below the cooling heat exchanger.
Bending air is refracted upward from below the cooling heat exchanger section, passes through the cooling heat exchanger and the heating heat exchanger, controls the temperature to a predetermined temperature, and then blows air into the vehicle interior. I have to.

[0003] Also, the above publication discloses a method of controlling the temperature of blown air, in which an air mix door is used to adjust the ratio of the amount of cold air that bypasses the heating heat exchanger and the amount of warm air that passes through the heating heat exchanger. An air mix method for adjusting the temperature of the blown air and a hot water flow rate adjusting method for adjusting the flow rate of the hot water to the heat exchanger for heating by a hot water valve to adjust the temperature of the blown air are disclosed.

[0004]

However, in the above-mentioned air mixing system, the air mixing door is installed upstream of the heating heat exchanger in order to open and close an air passage leading to the heating heat exchanger. . As a result, the air mixing door affects the flow of air toward the heating heat exchanger, thereby resulting in an uneven distribution of the air velocity toward the heating heat exchanger. Also, the temperature distribution of the hot air passing through becomes uneven. Therefore, a guide for controlling the air flow is provided in the air conditioning case to make the temperature distribution of the blown air uniform, but it is difficult to make the guide symmetrical, so that the right-hand drive vehicle and the left-hand drive It is difficult to use a common air-conditioning case with a car (common use of left and right air-conditioning cases).

On the other hand, in the case of the hot water flow rate adjusting method, since the above-mentioned air mixing door is not used, it is easy to equalize the wind speed distribution of the air toward the heating heat exchanger, and furthermore, the air passes through the heating heat exchanger. It is easy to make the temperature distribution of the hot air uniform. Therefore, the above-mentioned guide is not required, which is advantageous when the left and right air conditioning cases are shared.

[0006] However, there is no description in the above-mentioned publication about the common use of the left and right air-conditioning cases, and with reference to FIG. 5 of the above-mentioned publication, for example, a part of the case of the air conditioning unit and a part of the case of the blower unit are separated. Since it is integrally formed, it is disadvantageous for the common use of the left and right air conditioning cases, and no consideration is given to the common use of the left and right air conditioning cases.

[0007] The present invention has been made in view of the above points,
In a vehicle air conditioner in which an air conditioning unit is arranged at the approximate center position of the instrument panel in the vehicle width direction and a blower unit is arranged on the passenger side, a part of the case of the air conditioning unit is separated by a right-hand drive car and a left-hand drive car. The purpose is to enable commonality.

[0008]

In order to achieve the above object, according to the first aspect of the present invention, an air conditioning unit (2) is disposed at a substantially central position in a vehicle width direction of an instrument panel portion in a vehicle. An air conditioner for a vehicle in which a blower unit (1) for blowing air to a unit (2) is offsetly arranged on a passenger seat side of a vehicle, and an air inlet portion (211) is provided on a surface on a passenger seat side in an air conditioning case (20). The air conditioner for a vehicle has a cooling heat exchanger (23) disposed substantially horizontally, and a heating heat exchanger (25) disposed substantially horizontally above the cooling heat exchanger (23). In the device, a heat exchanger for heating (2
5) A hot water valve (27) for adjusting the amount of hot water flowing into the air conditioning case (20) is provided.
The air-conditioning case (20) is commonly used by right-hand drive vehicles and left-hand drive vehicles by setting the air conditioning case (20) at a position below the heating heat exchanger (25) and above the air inlet (211). It is characterized by being divided into an upper case (22a, 22b) and a lower case (21) exchanged between a right-hand drive vehicle and a left-hand drive vehicle.

According to this, since the hot water flow rate adjusting method which makes it easy to uniform the temperature distribution of the blowing air is adopted as the temperature adjusting method of the blowing air, a guide for making the temperature of the blowing air uniform is unnecessary. Can be In addition, the need for the guide is eliminated, and the lower case is provided with an air inlet portion at a different position between the right-hand drive vehicle and the left-hand drive vehicle, so that the upper case can be made symmetrical. Therefore, the upper case can be shared between the right-hand drive vehicle and the left-hand drive vehicle, and the case manufacturing cost can be reduced.

[0010] In addition, the above-mentioned Japanese Patent Application Laid-Open No. 9-123748.
As compared with the conventional apparatus described in Japanese Patent Application Laid-Open Publication No. H10-205, in which the dividing section is set at the same height as the heating heat exchanger, the dividing section is used for heating as in the invention according to claim 1. By setting it below the heat exchanger, it is possible to expand the range of cases that can be shared between left and right.

In the invention according to claim 2, the dividing section (A)
Is set above the cooling heat exchanger (23).

By the way, in a vehicle air conditioner in which a blower unit is offset to a passenger seat side of a vehicle with respect to an air conditioning unit, a cooling heat exchanger is installed to be inclined such that an air inlet side is slightly upward. In such a case, the case in which the cooling heat exchanger is stored cannot be shared on the left and right sides. On the other hand, by setting the dividing portion above the cooling heat exchanger as in the invention described in claim 2, the upper case can be shared between the left and right even when the cooling heat exchanger is installed at an angle. Is possible.

According to the third aspect of the present invention, the bypass passage (225) through which the blown air flows by bypassing the heating heat exchanger (25) and the sealing surface (226) surrounding the bypass passage (225) are provided in the upper case. (22a, 22b), contacting and separating from the sealing surface (226),
25) open and close the bypass door (30) to the upper case (2).
2a, 22b).

By the way, in a device having a bypass passage beside a heating heat exchanger, the above-mentioned Japanese Patent Application Laid-Open No.
When the dividing portion is set at a position at the same height as the heating heat exchanger as in the conventional device described in Japanese Patent No. 3748, the sealing surface is divided into an upper case side and a lower case side as shown in FIG. As a result, a step is likely to be formed on the sealing surface, and poor sealing occurs when the bypass door is fully closed.

On the other hand, according to the third aspect of the present invention, the sealing surface is formed only on the upper case, so that the sealing surface can be prevented from being divided into upper and lower parts, and therefore, no step is formed on the sealing surface. Therefore, it is possible to prevent poor sealing when the bypass door is fully closed.

According to the fourth aspect of the present invention, there is provided a duct (18) for guiding the blast air of the blower unit (1) to the air inlet (211), and the duct (18) is connected to the blower unit (1) and the air conditioner. It is characterized in that it is formed separately from the unit (2).

As a result, the duct (18) can be shared on the left and right sides, and the case manufacturing cost can be reduced.

According to the present invention, the upper case (2)
2a, 22b) are formed on the air downstream side of the heating heat exchanger (25), and blow-off openings (221 to 223) for blowing out blast air into the vehicle interior; and the upper case (22a, 22b).
22b) and the outlet openings (221-22)
And (3) a blow mode switching door (29) that opens and closes.

According to this, since the blowout opening is also formed in the upper case, the range of the case which can be made common to the left and right can be further expanded.

Note that the reference numerals in parentheses of the above means indicate the correspondence with specific means described in the embodiments described later.

[0021]

1 to 5 show one embodiment of the present invention. FIG. 1 is a front view showing the entire structure of a vehicle air conditioner, and FIG. 2 is a diagram showing an air conditioner unit from the left side of FIG. FIG. 3 is a side sectional view of the air conditioning unit viewed from the left side of FIG. 1, FIG. 4 is a graph of a flow rate adjustment characteristic of a hot water valve, and FIG. 5 is a graph of an opening degree characteristic of a bypass door.

The vehicle air conditioner is roughly divided into two parts, a blower unit 1 and an air conditioner unit 2. The blower unit 1 is offset from the center of the instrument panel at the front of the passenger compartment toward the passenger seat (right-hand drive vehicle). (Offset to the left in the vehicle width direction). On the other hand, the air conditioning unit 2 is arranged at the center of the instrument panel in the vehicle width direction.

The blower unit 1 has an inside / outside air switching box 1 for switching and introducing between the vehicle interior air and the vehicle exterior air in an upper portion thereof.
The inside / outside air switching box 11 is provided with an outside air inlet 12 and an inside air inlet 13. Inside and outside air switching doors (not shown) for opening and closing the two inlets 12, 13 are provided therein. Is installed.

A blower 14 is arranged below the inside / outside air switching box 11, and the blower 14 includes a blower fan 15 composed of a centrifugal multi-blade fan (radial fan) and a fan drive motor 16. It is housed in a resin scroll casing (blower case) 17.

The rotation axis of the fan 15 is disposed so as to be directed substantially vertically, and the rotation of the fan 15 causes suction from the inside / outside air switching box 11 through a bell mouth-shaped suction port (not shown) in the upper part of the scroll casing 17. The air is blown in a substantially horizontal direction toward the outlet of the scroll casing 17 (from the left side to the right side of the vehicle compartment).

On the other hand, the air conditioning unit 2 has a resin air conditioning case 20 forming an air passage. This air conditioning case 2
Reference numeral 0 denotes a plurality of cases (three in this example) in which the overall shape is formed into a substantially box shape and a device described below is accommodated.
And these cases are combined. Specifically, the air-conditioning case 20 is vertically divided into an upper case and a lower case 21 by an upper and lower division A, and the upper case is further divided by a left and right division B into a first upper case in the vehicle width direction (left and right). 22a and a second upper case 22a.

An air inlet 211 is provided at the lower part of the lower case 21 on the side facing the scroll casing 17. The air inlet 211 is connected to the air outlet of the scroll casing 17 by an intermediate duct 18 made of resin. 171 is connected. Then, the air blown by the blower unit 1 flows through the lower duct 21 through the intermediate duct 18.
The air is introduced into the air inflow space 212. The air inflow space 212 is formed at the lowermost portion inside the lower case 21 over the entire length in the vehicle width direction.

The air inflow space 2 inside the lower case 21
Above 12, an evaporator (cooling heat exchanger) 23 of the refrigeration cycle is installed in a substantially horizontal state. However,
The evaporator 23 is installed so as to be inclined slightly upward on the air inlet portion 211 side (left side in the vehicle width direction). For this reason, the blown air from the blower unit 1 is introduced into the evaporator 23 from below, and is drawn out upward.
The evaporator 23 is formed by stacking a number of flat tubes made of aluminum, arranging corrugated fins made of aluminum between the tubes, and forming an aluminum tank at both ends in the longitudinal direction of the tubes (in this example, the left-right direction of the vehicle). Are arranged, and the whole has a thin rectangular shape.

A drain pipe 213 is integrally formed on the bottom of the lower case 21 and on the front side of the vehicle.
The condensed water generated in the three parts is discharged to the outside of the vehicle through a drain pipe 213. The expansion valve 24 of the refrigeration cycle is housed on the front surface of the lower case 21 and on the left end side in the vehicle width direction, and the expansion valve 24 is assembled to the tank of the evaporator 23.

In the first and second upper cases 22a and 22b, a heater core 25 for heating the blast air using the engine cooling water (warm water) as a heat source is provided in a horizontal state downstream of the evaporator 23 (above the vehicle cabin). Installed. The heater core 25 is formed by laminating a number of flat tubes made of aluminum and disposing aluminum core corrugated fins between the tubes, and core portions 25a at both ends in the longitudinal direction of the tubes (in the vehicle front-rear direction in this example). It has aluminum tank portions 25b and 25c, and has a thin rectangular shape as a whole.

In the heater core 25 of this embodiment, the inlet tank 25b is located on the rear side of the vehicle so as to be adjacent to the bypass passage 225, and the outlet tank 25c is located on the front side of the vehicle. Therefore, the heater core 25 is connected to the inlet tank 25b.
Is configured as a one-way flow type (all-pass type) in which hot water flows through all the flat tubes of the core portion 25a in one direction from the vehicle rear side to the vehicle front side.

One end (left side in the vehicle width direction) of the heater core 25 is exposed to the outside through the second upper case 22b, so that a hot water pipe is connected outside the case. The engine cooling water (hot water) flows into the hot water valve 27 through the first hot water inlet pipe 26a, and flows into the inlet tank 25b of the heater core 25 from the hot water valve 27 through the second hot water inlet pipe 26b. . Heater core 2
The hot water that has passed through the core portion 25a of
5c flows into a hot water valve 27 via a first hot water outlet pipe 26c, and is returned from the hot water valve 27 to a water pump (not shown) via a second hot water outlet pipe 26d.

The hot water valve 27 adjusts the flow rate of hot water flowing into the heater core 25 to adjust the temperature of air blown into the vehicle interior, and is driven by a servomotor 28. Specifically, an electric signal corresponding to the set temperature is generated by an outlet air temperature setting lever provided on the air conditioning control panel, and the operation amount of the servo motor 28 is controlled based on the electric signal of the set temperature. The opening of the hot water valve 27 is adjusted.

In the first and second upper cases 22a and 22b, a resin-made rotary door (blow-out mode switching door) 29 for switching a blow-out mode is provided at a position downstream of the heater core 25 in the air (above the vehicle compartment). It is installed movably. The rotary door 29 has a semi-cylindrical circumferential wall 291 having an arc range of approximately 180 °, and the inside of the circumferential wall 291 constantly communicates with the downstream side of the heater core 25 in the air.
1 has a communication hole 292 that communicates the inside and outside of the circumferential wall 291.

Rotary shafts 293 integrally formed at both ends of the rotary door 29 are provided with first and second upper cases 22a and 22b.
A link mechanism (not shown) is attached to the rotating shaft 293 outside the first and second upper cases 22a and 22b, and further via a cable (not shown). , Is connected to an air outlet mode switching lever provided on an air conditioning control panel (not shown) in the vehicle compartment. This allows the rotary door 29 to rotate based on a manual operation of the blowout mode switching lever. Note that the rotary door 29 can be driven by a servomotor.

In the first and second upper cases 22a and 22b, in the region where the rotary door 29 rotates, three blowout openings 221 222 and 223 are formed in the rotation direction (circumferential direction) of the rotary door 29. Are formed adjacent to each other,
The circumferential wall 291 of the rotary door 29 slides at the leading end of the partition wall of the first and second upper cases 22a and 22b forming the three blowout openings 221 222 and 223.

The three outlet openings 221, 222, 223
Of these, the face outlet 221 located closest to the rear of the vehicle communicates with a face outlet (not shown) that blows air toward the upper side (occupant head side) in the vehicle interior.
Also, the defroster blowout opening 2 located at the middle of the three blowout openings 221, 222, 223 in the vehicle front-rear direction.
Reference numeral 22 communicates with a defroster outlet (not shown) for blowing air toward the inner surface of the vehicle windshield.

The three outlet openings 221, 222, 223
Foot outlet opening 22 located at the most front side of the vehicle.
3 is connected to the foot duct 40 via an upper foot air passage 224 formed integrally with the first and second upper cases 22a and 22b and a lower foot air passage 215 formed integrally with the lower case 21. I have. Then, the air is guided to below the lower case 21 by the foot duct 40,
The heater core 25 that blows air from the foot outlet 40a toward the feet of the occupant in the front seat is located in the first and second upper cases 22a and 22b on the vehicle front side, and is located on the side of the heater core 25 (vehicle). On the rear side), the heater core 2
5, a bypass passage 225 for allowing air to flow therethrough and a sealing surface 226 surrounding the bypass passage 225 are formed. A rotatable, plate-shaped bypass door 30 that opens and closes the bypass passage 225 while being in contact with and separating from the seal surface 226 is installed at the bypass passage 225.

In the bypass door 30, an integrally formed rotating shaft 301 is rotatably supported by the first and second upper cases 22a and 22b, and the first and second upper cases are mounted on the rotating shaft 301. A link mechanism (not shown) is mounted outside of 22a and 22b. This link mechanism is connected to the servomotor 28.

Next, the operation of this embodiment based on the above configuration will be described.

When the air conditioner switch (not shown) of the present embodiment is turned on, the air flowing from the inside / outside air switching box 11 flows in the scroll casing 17 in a substantially horizontal direction by the blower 14 and flows to the intermediate duct 18. And
The blown air flowing through the intermediate duct 18 and flowing to the lower surface of the evaporator 23 is cooled and dehumidified by the evaporator 23, and thereafter,
Heated by the heater core 25, the air is blown into the vehicle interior through the blowout openings 221 to 223 selected by the rotary door 29.

FIGS. 4 and 5 illustrate the temperature adjusting operation of this embodiment. The horizontal axis in FIGS. 4 and 5 indicates the operating position of the blow-off air temperature setting lever provided on the air conditioning control panel. The hot water valve 27 is fully closed at the maximum cooling position (lowest temperature position) of the blow-out air temperature setting lever and fully opened at the maximum heating position (highest temperature position). When the outlet air temperature setting lever is operated from the maximum cooling position to the maximum heating position, the opening degree (opening area) of the hot water valve 27 increases, and the flow rate of hot water passing through the hot water valve 27 increases as shown in FIG. Characteristics.

FIG. 5 shows the opening degree characteristics of the bypass door 30. The bypass door 30 is fully closed at the maximum heating position of the blow air temperature setting lever, and the blow air temperature setting lever is moved to a predetermined intermediate position from the maximum heating position. Until the position C is operated, the fully closed state of the bypass door 30 is maintained. When the blow air temperature setting lever reaches the intermediate position C, the bypass door 30 opens, and when the blow air temperature setting lever is operated from the intermediate position C to the maximum cooling side, the opening degree of the bypass door 30 (the bypass passage 225). (Opening area) continuously increases, and the opening degree characteristic is such that the bypass door 30 is fully opened at the maximum cooling position of the blowout air temperature setting lever.

Therefore, according to the present embodiment, at the maximum cooling position of the blow-off air temperature setting lever, the hot water valve 27 is fully closed, and the bypass door 30 fully opens the bypass passage 225 to reduce the ventilation resistance. We can show ability to the maximum. In the maximum heating position of the blow-off air temperature setting lever, the hot water valve 27 is fully opened, the bypass door 30 is fully closed, and the entire amount of the blown air is reduced by the heater core 25.
, The heating capacity can be maximized.

While the outlet air temperature setting lever is operated from the maximum heating position to the intermediate position C, the bypass door 3
Since 0 holds the fully closed state, the blowing temperature of the heater core 25 is adjusted only by the flow rate adjusting action of the hot water valve 27 during this time. In addition, the outlet air temperature setting lever is moved to the intermediate position C.
When operating from the maximum cooling side, the bypass door 3
0 is opened, and the cool air passes through the bypass passage 225. Therefore, between the intermediate position C and the maximum cooling position, the cool air mixes with the warm air that has passed through the heater core 25 to become the conditioned air at the desired temperature.

That is, between the intermediate position C and the maximum cooling position, the flow rate of hot water to the heater core 25 is adjusted by the hot water valve 27 in accordance with the characteristics of FIG. ) By the bypass passage 225
Is adjusted, and the blowing temperature is adjusted by a combination of the hot water flow rate adjustment and the cold air amount adjustment.

Next, the features of this embodiment will be described.

First, in the present embodiment, the blow-out temperature adjustment system in which the hot water flow rate adjustment and the cold air flow amount adjustment are combined is adopted. However, the guide for uniformizing the blow-out air temperature used in the air-mix system is as follows. Not required. That is, since the bypass door 30 for adjusting the amount of cool air does not open and close the air passage leading to the heater core 25, the heater core 2
5 is located on the side of the heater core 25, not on the upstream side of the air, and hardly affects the flow of air toward the heater core 25. Therefore, as in the case of the hot water flow control method using only the hot water valve, it is easy to equalize the wind speed distribution of the air toward the heater core 25, and furthermore, to equalize the blown air temperature, and the above-mentioned guide is unnecessary. As described above, by adopting the method of adjusting the blow-out temperature by using the hot water valve 27, a guide is not required, which is advantageous for the common use of the left and right air conditioning cases 20.

In response to this, the upper and lower divisions A of the air conditioning case 20 are set at positions below the heater core 25 and above the air inlet 211. According to this, since the position of the air inlet 211 is different between the right-hand drive vehicle and the left-hand drive vehicle, the lower case 21 is exchanged (selected) between the right-hand drive vehicle and the left-hand drive vehicle. On the other hand, the fact that the guide is not required as described above and the fact that the air inlet portion 211 is formed in the lower case 21 are combined, so that the first and second air inlets 211 are formed.
The upper cases 22a and 22b can be made symmetrical, so that the first and second upper cases 22a and 22b can be shared between the right-hand drive vehicle and the left-hand drive vehicle, thereby reducing the case manufacturing cost. .

When the evaporator 23 is installed at an angle so that the air inlet 211 side is slightly upward, the evaporator 23
The upper and lower divisions A of the air-conditioning case 20 are set at a position higher than the evaporator 23 so that the case where the evaporator 23 is installed at an angle can be used. The first and second upper cases 22a and 22b can be made common to the left and right.

In addition, since the upper and lower divisions A are set below the heater core 25, the above-mentioned Japanese Patent Application Laid-Open No.
The range of the case where the left and right sides can be shared can be expanded as compared with the conventional apparatus described in Japanese Patent No. 3748, in which the upper and lower divisions of the air conditioning case are set at the same height as the heater core.

When the hot water valve 27, the rotary door 29 and the bypass door 30 are disposed separately in the lower case 21 and the first and second upper cases 22a and 22b,
In order to accurately set the mutual positional relationship, a high processing accuracy is required at the time of manufacturing the lower case 21 and the first and second upper cases 22a and 22b. On the other hand, in the present embodiment, the hot water valve 27, the rotary door 29, the bypass door 30, the link mechanism and the servomotor 28 can all be assembled to the first and second upper cases 22a and 22b. , The lower case 21 and the first and second upper cases 22a, 22b are not required to have high processing accuracy, and thus the case manufacturing cost can be reduced.

By the way, in the apparatus having the bypass passage 225 on the side (rear side of the vehicle) of the heater core 25 as in this embodiment, the upper and lower sides of the air-conditioning case are located at the same height as the heater core as in the apparatus described in the above publication. When the dividing portion is set, the sealing surface 226 is divided into the first and second upper cases 22a and 22b and the lower case 21 as shown in FIG. Then, the first and second upper cases 22a, 22
b, the sealing surface 226
It is difficult to form a fitting portion for positioning on the mating surface of the seal surface 226. Therefore, as shown in FIG.
In this case, when the bypass door 30 is fully closed, poor sealing occurs.

On the other hand, according to the present embodiment, since the upper and lower divided portions A of the air conditioning case 20 are set at positions below the heater core 25 and the sealing surface 226, the sealing surface 226 is in the first and second positions. (2) The seal surface 226 is formed only on the upper cases 22a and 22b and can be prevented from being divided into upper and lower parts. Therefore, since there is no step on the seal surface 226, it is possible to prevent poor sealing when the bypass door 30 is fully closed. Can be.

In this embodiment, since the upper case is divided into left and right, the sealing surface 226 is divided into the first upper case 22a and the second upper case 22b. Since it is possible to form a fitting part for positioning on the mating surface with the second upper case 22b,
The positioning fitting portion can accurately position the first upper case 22a and the second upper case 22b. Therefore, the sealing surface 226 on the first upper case 22a side and the second upper case 22b side can be accurately positioned. The level difference from the sealing surface 226 can be made small enough to have no practical problem.

Since the intermediate duct 18 is formed separately from the blower unit 1 and the air conditioning unit 2,
The left and right intermediate ducts 18 can be shared, and the case manufacturing cost can be reduced.

(Other Embodiments) In the above embodiment, the hot water valve 27 and the bypass door 30 are driven by the servo motor 28, and the servo motor 28 is driven based on an electric signal corresponding to the operating position of the blow air temperature setting lever. 28, the hot water valve 27 and the bypass door 30 are connected to the blow air temperature setting lever by a purely mechanical connecting mechanism such as a link mechanism, and the hot water valve is operated by operating the blow air temperature setting lever. 27 and the bypass door 30 may be linked mechanically.

In the above embodiment, the air conditioning unit 2 having the bypass passage 225 and the bypass door 30
As described above, the present invention is applied to the bypass passage 225.
Also, the present invention can be applied to an air conditioning unit having no bypass door 30.

[Brief description of the drawings]

FIG. 1 is a front view showing an overall configuration of a vehicle air conditioner according to an embodiment of the present invention.

FIG. 2 is a side view of the air conditioning unit of FIG.

FIG. 3 is a side sectional view of the air conditioning unit of FIG. 1;

FIG. 4 is a graph showing flow rate adjustment characteristics of the hot water valve of FIG. 1;

FIG. 5 is a graph of an opening characteristic of the bypass door of FIG. 3;

FIG. 6 is a sectional view of a main part of an air conditioning unit shown for comparison with the device of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Blower unit, 2 ... Air-conditioning unit, 20 ... Air-conditioning case, 21 ... Lower case, 211 ... Air inlet part, 22a,
22b: first and second upper cases, 221 to 223, blow-out openings, 23, evaporators (heat exchangers for cooling), 25, heater cores (heat exchangers for heating), 27, hot water valves, 29, rotary doors (Blowout mode switching door), A: Upper and lower divisions.

Claims (5)

[Claims] An air conditioning unit (2) is arranged at a substantially central position in a vehicle width direction of a vehicle interior instrument panel, and a blower unit (1) for blowing air to the air conditioning unit (2) is provided on a passenger seat side of the vehicle. An air-conditioning case (20) forming an air passage of the air-conditioning unit (2); and an air-conditioning unit (2) formed on a surface of the air-conditioning case (20) on the front passenger seat side, An air inlet (211) for introducing the air blown from the unit (1), and a cooling unit arranged substantially horizontally in the air-conditioning case (20) for cooling the air blown to the air inlet (211). A heat exchanger (23); a heat exchanger for heating arranged substantially horizontally above the cooling heat exchanger (23) in the air conditioning case (20) to heat the blast air using hot water as a heat source. Tableware (25)
A hot water valve (27) for adjusting an amount of hot water flowing into the heating heat exchanger (25), and a vertically divided portion (A) of the air conditioning case (20). To
The air-conditioning case (20) is shared by a right-hand drive vehicle and a left-hand drive vehicle by setting the air conditioning case (20) below the heating heat exchanger (25) and above the air inlet (211). An air conditioner for a vehicle, which is divided into an upper case (22a, 22b) to be used and a lower case (21) exchanged between a right-hand drive vehicle and a left-hand drive vehicle. 2. The air conditioner for a vehicle according to claim 1, wherein the dividing portion (A) is set above the cooling heat exchanger (23). 3. The upper case (22a, 22b) comprising: a bypass passage (225) through which air is blown, bypassing the heating heat exchanger (25); and a sealing surface (226) surrounding the bypass passage (225). The bypass door (30) which opens and closes the bypass passage (225) by contacting and separating from the sealing surface (226) is disposed in the upper case (22a, 22b). 3. The vehicle air conditioner according to 2. 4. A duct (18) for guiding blast air of the blower unit (1) to the air inlet (211), and the duct (18) is connected to the blower unit (1).
The air conditioner for a vehicle according to any one of claims 1 to 3, wherein the air conditioner is formed separately from the air conditioning unit (2). 5. An air outlet (22) formed in the upper case (22a, 22b) downstream of the heating heat exchanger (25) to blow air into the vehicle interior.
And a blow mode switching door (29) disposed in the upper case (22a, 22b) to open and close the blow openings (221 to 223). The vehicle air conditioner according to any one of 1 to 4.