JP2003072348A - Air conditioner for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely prevent fog on a window glass of a side door by blasting air of an appropriate temperature and a flow rate from a side ventilator 82, when a blast mode is except for a vent mode, in an air conditioner 1 for a vehicle formed by approximately horizontally disposed with an evaporator 33 and a heater core 34 vertically in a unit case 30. SOLUTION: An auxiliary guide port 54 bypassing air passing through the heater core 34 to avoid a side vent guide port 51 and guiding to the side ventilator 82, when the blast mode is except for the vent mode, is provided between the side vent guide port 51 and a defroster guide port 52 in the upper end part of the unit case 30.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle air conditioner, and is particularly referred to as an integrated air conditioner in which a cooling heat exchanger and a heating heat exchanger are vertically arranged in a unit case. Belongs to the technical field of things.

[0002]

2. Description of the Related Art Generally, an integrated air conditioner of this type is a unit installed in an instrument panel provided in a front portion of an interior of an automobile, as disclosed in, for example, Japanese Unexamined Patent Publication No. 10-244820. A case is provided, and an introduction port for introducing the air blown by the blower into the unit case is opened at the lower part of the unit case. In this unit case, an evaporator serving as a cooling heat exchanger located above the inlet and a heater core serving as a heating heat exchanger located above the evaporator are provided. Further, in the unit case, on the vehicle rear side of the heater core, there is provided a bypass passage through which the air passing through the evaporator is caused to bypass the heater core, and the air to be passed to the bypass passage and the air to be passed to the heater core. The flow rate of is adjusted by the air mix damper.

When the blowing mode set by the occupant of the automobile is the vent mode, the air (cooling air) flowing through the bypass passage alone or the air (heated air) that has passed through the heater core to the cooling air. Are merged and led out to a ventilator from a vent outlet provided in the rear of the vehicle at the upper end of the unit case. On the other hand, when the blowout mode is the defroster mode (heat mode), the heating air alone or the heating air is combined with the cooling air, and the defroster (side) is provided from the defroster outlet provided on the vehicle front side of the vent outlet. Includes a demister to prevent fogging of door windshields). Therefore, the temperature of the air blown from the ventilator or the defroster is determined by adjusting the mixing ratio of the cooling air and the heating air, that is, the flow ratio of the air mix damper.

[0004]

By the way, in a vehicle in which a center ventilator and a side ventilator are provided at substantially the center and both ends of the instrument panel, even if the blowout mode is not the vent mode, By blowing out the air, it may be possible to assist the demister in preventing the windshield of the side door from being fogged, or to prevent the frost in the absence of the demister. In this case, air is led to the side ventilator even when the center vent outlet and the side vent outlet are closed by the blowing direction switching damper provided for opening and closing the both vent outlets at the same time. A part of the blowing direction switching damper may be cut out, or a gap may be formed in a part between the blowing direction switching damper and the side vent guiding port with both vent outlets closed. Is common.

However, in such a structure, when the center vent outlet and the side vent outlet are closed by the blowing direction switching damper, a sufficient amount of air can be led from the side vent outlet to the side ventilator. Even if it is difficult and the center vent outlet and side vent outlets are open, an appropriate temperature for preventing fogging of the side window glass, especially when applied to the above integrated air conditioner. There is a problem that it is difficult to draw out the air of the above from the side vent outlet to the side ventilator.

That is, in the integrated air conditioner, the center vent outlet and the side vent outlet are usually provided on the vehicle rear side of the upper end of the unit case, and the defroster outlet is provided on the vehicle front side, and the efficiency during cooling is improved. From the viewpoint of emphasizing the above, it is desirable that the bypass passage is provided so as to extend in the vertical direction on the vehicle rear side of the heater core, and both vent outlets are provided substantially directly above the bypass passage. However, in such a configuration, the heated air that has passed through the heater core needs to be introduced from the side of the bypass passage into the passage to change its flow direction, and then to be discharged from both vent outlet ports. It becomes difficult to stably lead the heated air to the cooling air through the side vent outlet. As a result, the integrated air conditioner cannot sufficiently obtain the effect of preventing the windshield from fogging due to the air blown out from the side ventilator.

The present invention has been made in view of the above problems, and an object of the present invention is to provide an appropriate air conditioner from the side ventilator when the blowout mode is other than the vent mode in the above integrated air conditioner. By blowing out air at a temperature and a flow rate, it is possible to surely prevent fogging of the windshield of the side door.

[0008]

In order to achieve the above object, according to the present invention, the blowout mode is controlled by the blowout direction switching damper between the side vent outlet and the defroster outlet at the upper end of the unit case. When the mode other than the mode in which only the vent outlet and the side vent outlet are opened (vent mode), at least an auxiliary outlet for bypassing the heated air to bypass the side vent outlet to the side ventilator is provided. .

Specifically, according to the first aspect of the invention, a unit case is provided in a central portion in the vehicle width direction inside an instrument panel provided in a vehicle compartment of the automobile, and the unit case is opened, and the unit case is opened. In the case, an inlet for introducing air blown by a blower, and arranged in the unit case above the inlet,
A cooling heat exchanger that allows the air introduced from the inlet to pass therethrough to be cooled, and an air that has been disposed above the cooling heat exchanger in the unit case and has passed through the cooling heat exchanger. A heating heat exchanger that passes and heats the air, which is provided on the vehicle rear side of the heating heat exchanger in the unit case and passes through the cooling heat exchanger,
A bypass passage for bypassing the heating heat exchanger; a merging portion provided in the bypass passage where the air passing through the heating heat exchanger merges with the air flowing through the bypass passage; and the unit case. Of the above-mentioned unit case, which are opened at the upper end of the unit in the state of being aligned in the vehicle width direction, and through which the air in the merging portion of the bypass passage is led out to the center ventilator and the side ventilator, respectively. A defroster outlet for leading the air in the confluence part of the bypass passage to the defroster, which is opened at the upper end part apart from the center vent outlet and the side vent outlet to the front side of the vehicle, and is set by the vehicle occupant. Depending on the blowout mode, at least the center vent outlet, side vent outlet and defrost Target vehicle air-conditioning apparatus provided with a blowing direction switching damper for opening and closing the outlet port.

The upper end of the unit case is opened between the side vent outlet and the defroster outlet, and the outlet mode is opened by the outlet direction switching damper to open only the center vent outlet and the side vent outlet. When the mode is other than the above mode, it is assumed that at least an auxiliary outlet for letting air that has passed through the heating heat exchanger bypass the side vent outlet and be led to the side ventilator.

With the above structure, when the center vent outlet and the side vent outlet are closed by the outlet direction switching damper (when the outlet mode is the defroster mode, etc.), the merging portion of the bypass passage is Since the air is mainly heated air, the heated air is led to the side ventilator from the auxiliary outlet. This auxiliary outlet can be set to an optimum size, unlike a case where the damper is provided with a notch or the like. On the other hand, when the blowout mode is other than the bench mode and the center vent outlet and the side vent outlet are in the open state (when in the bi-level mode in which conditioned air is blown out from both the ventilator and the occupant's feet) The cooling air is mainly discharged to the center ventilator and the side ventilator from the center vent outlet and the side vent outlet. At this time, at least heated air bypasses the side vent outlet from the auxiliary outlet and is discharged to the side ventilator. As a result, even if the heated air cannot be stably discharged from the side vent outlet to the side ventilator, the heated air is discharged to the side ventilator from the auxiliary outlet, so that the air at a temperature suitable for fogging prevention can be obtained. Can be blown out from the side ventilator. As a result, air having a temperature and flow rate suitable for preventing fogging can be blown out from the side ventilator to reliably prevent fogging of the windshield of the side door.

Since the auxiliary outlet port is provided between the side vent outlet port and the defroster outlet port, when the side vent outlet port and the side ventilator are connected by a duct, the side vent outlet port of the duct is connected. If the opening on the outlet side is enlarged toward the front of the vehicle with respect to the side vent outlet so as to cover both the side vent outlet and the auxiliary outlet, the auxiliary outlet and the side vent outlet can be provided by a single duct side ventilator. Can be connected to at the same time. Further, the defroster outlet needs to be moved to the vehicle front side by the amount of the auxiliary outlet, but it is preferable because it can be brought closer to the defroster.

According to a second aspect of the invention, in the first aspect of the invention, a center vent duct connecting the center vent outlet and the center ventilator and a side vent duct connecting the side vent outlet and the side ventilator are provided. The side vent outlet side opening of the side vent duct covers the side vent outlet port and the auxiliary outlet port, and the center vent outlet port side opening of the center vent duct covers the center vent outlet port,
It is assumed that the center vent outlet is large on the front side of the vehicle.

As a result, the auxiliary outlet and the side vent outlet can be simultaneously connected to the side ventilator by one duct as described above, and the center vent outlet side opening of the center vent duct is connected to the side vent duct. The size of the side vent outlet can be made approximately the same as the size of the side vent outlet. Even when the air flow rate is considerably reduced, the flow rate of the air flowing through the center vent duct can be sufficiently secured.

According to a third aspect of the present invention, in the first or second aspect of the invention, the bypass passage is provided so as to extend in a substantially vertical direction on the vehicle rear side of the heating heat exchanger, and has a center vent outlet and a side vent. The outlet is assumed to be provided almost directly above the bypass passage.

As a result, the cooling air becomes a linear air flow, so that the energy loss particularly during cooling can be suppressed as much as possible. On the other hand, with such a configuration, it becomes considerably difficult to stably lead the heated air from the side vent outlet to the side ventilator when the blowout mode is the bilevel mode or the like. However, in the present invention, since the auxiliary outlet is provided, it is possible to reliably prevent the windshield of the side door from being fogged, and the effect of the invention of claim 1 can be effectively exhibited.

According to a fourth aspect of the present invention, in any one of the first to third aspects of the invention, the unit case has a center line in the vehicle width direction of a portion excluding an upper end portion of the unit case when viewed from the vehicle front-rear direction. It is assumed that the instrument panel is disposed so as to be displaced toward the passenger seat side with respect to the center of the vehicle in the vehicle width direction.

By so doing, a space for the clutch or accelerator provided at the foot of the driver's seat and its connecting member can be secured, and at the upper end of the unit case provided with the center vent outlet and the side vent outlet,
The center line in the vehicle width direction can be made to substantially coincide with the center of the instrument panel in the vehicle width direction, and the driver seat side and the passenger seat side can be made to blow out air of substantially the same flow rate.

According to a fifth aspect of the invention, in any one of the first to fourth aspects of the invention, the unit case has a driver seat side portion and a passenger seat side portion which are divided into two in the vehicle width direction,
There is a plurality of fastening portions for fastening the driver seat side portion and the passenger seat side portion with screws, and at least one of the plurality of fastening portions is provided between the center vent outlet and the defroster outlet. It shall be provided so as to project to the outside of the unit case.

As a result, the strength near the center vent outlet or the defroster outlet, which normally extends over the driver's seat side and the passenger's seat side, can be sufficiently secured, and in the vicinity of these outlets, the driver seat side can be secured. It is possible to prevent air from leaking to the outside of the unit case from a gap formed between the portion and the passenger seat side portion. Also, since the fastening part is provided so as to project to the outside of the unit case, the fastening work with screws becomes easier and the inner space can be maximized as compared to the case where the fastening part is provided inside the unit case. can do. Since there is no need to provide an auxiliary outlet between the center vent outlet and the defroster outlet, a sufficient space can be secured for the fastening portion to project outside the unit case. Further, particularly when the opening of the center vent duct on the side of the center vent outlet is formed larger on the vehicle front side than the center vent outlet, the fastening portion is housed in the duct. can do.

[0021]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. 1 to 6 show a vehicle air conditioner 1 (hereinafter, referred to as an air conditioner 1) according to an embodiment of the present invention. The air conditioner 1 is inside an instrument panel 2 provided in a front portion of a vehicle compartment of an automobile. It is installed in. This vehicle is a so-called right-hand drive vehicle in which a driver's seat and a passenger's seat are provided on the right side and the left side of the vehicle, respectively, and a dash panel P separates the engine room at the front of the vehicle from the front side of the vehicle compartment.

The air conditioner 1 has a blower unit 3 for blowing air, an air conditioner unit 4 for introducing air blown from the blower unit 3 to adjust the temperature, and a blower unit 3 for blowing air to the air conditioner unit 4. And an intermediate duct 5 for sending the compressed air.

The air conditioning unit 4 is arranged in the instrument panel 2 at a substantially central portion in the vehicle width direction, while the air blowing unit 3 is separated from the air conditioning unit 4 to the left side of the vehicle and is located in the passenger seat. It is located in the front. Further, the lower end of the blower unit 3 is positioned above the lower end of the air conditioning unit 4 so as to secure a wide foot space for passengers in the passenger seat.

The blower unit 3 is provided with a casing 6 which is divided into two in the vehicle width direction at a substantially central portion in the vehicle width direction, and they are integrated by using a fastener or the like. The upper half of the casing 6 serves as an air intake portion 7 for taking in air to the blower unit 3, while the remaining portion has a blower portion for blowing the taken-in air to the air conditioning unit 4. It is supposed to be 8.

At the upper part of the air intake portion 7, an outside air intake 10 for taking in air outside the vehicle compartment and an inside air intake 11 for taking in air inside the vehicle interior are formed. Either one of 10, 11
The inside / outside air switching damper 12, which is operated by an actuator 15 provided on the right side wall of the casing 6, closes the other side while the other side opens. That is, when the outside air intake 10 is fully opened by the inside / outside air switching damper 12, the inside air intake 11 is fully closed, and the outside air intake mode for taking in only the air outside the vehicle compartment is set, while the outside air intake 10 is opened. Is fully closed, the inside air intake port 11 is fully opened, and the inside air circulation mode for taking in only the air in the vehicle compartment is set. A lattice-shaped grill 13 is attached to the inside air intake 11.

On the other hand, a filter arranging portion 21 in which a filter 20 for filtering the air taken in through the outside air inlet 10 or the inside air inlet 11 is arranged below the air intake portion 7. An opening is formed on the vehicle rear side of the filter arrangement portion 21, and the filter 20 can be exchanged through this opening. The blower unit 8 is provided below the filter arrangement unit 21, and inside the blower unit 8, a centrifugal multi-blade fan 23 as a blower has its rotation axis directed vertically. A fan drive motor 24 for driving the fan 23 is provided below the fan 23.

The left end portion of the intermediate duct 5 is connected to the right side wall portion of the casing 6 in the blower section 8. The intermediate duct 5 is formed so as to extend obliquely downward from the left end portion thereof toward the lower end side of the air conditioning unit 4, and the right end portion thereof is opened at the lower end portion of the unit case 30 of the air conditioning unit 4 and The unit case 3
It is connected to an inlet port 25 for introducing air into 0. The intermediate duct 5 has a substantially rectangular cross section that is long in the vehicle front-rear direction, and a control circuit 26 for controlling the rotation speed of the fan drive motor 24 is arranged on the upper wall thereof. .

The air conditioning unit 4 has a unit case 30 which is long in the vertical direction as a whole and is formed in a rectangular box shape larger than the casing 6 of the blower unit 3. The unit case 30 is divided into a bottom wall portion 31 and a main body portion 32 above the bottom wall portion 31, and the main body portion 32 is similar to the blower unit 3 in the above.
It is divided into two parts in the vehicle width direction at a substantially central part in the vehicle width direction, and is composed of a driver seat side part 32a and a passenger seat side part 32b. These driver side 32a and passenger side 32b
Are fastened to each other by screws at a plurality of fastening portions 30a provided so as to project to the outside of the unit case 30. One of the plurality of fastening portions 30a (may be two or more) is provided with a center vent outlet 50 described later.
And the defroster outlet 52.

An evaporator 33 as a heat exchanger for cooling that cools the air introduced into the unit case 30 through the inlet 25 is provided above the inlet 25 in the unit case 30. It is arranged. Further, above the evaporator 33 in the unit case 30, a heater core 34 as a heat exchanger for heating that allows the air passing through the evaporator 33 to pass therethrough is disposed. The air thus introduced into the unit case 30 through the introduction port 25 flows upward from the lower end in the unit case 30.

Although not shown in the figure, the evaporator 33 is formed by stacking a large number of tubes made of thin metal plates such as aluminum so as to extend in the same direction, and forming the same thin metal plates between adjacent tubes. The corrugated fins are interposed. This evaporator 3
A low-temperature refrigerant circulates in the tube of No. 3, and this refrigerant cools the air passing through the evaporator 33. Also, this evaporator 3
In Fig. 3, tanks communicating with the tubes are provided at both ends of the tube, and one of the tanks has an inflow tank portion and an outflow tank portion by a partition plate arranged at the central portion in the stacking direction of the tubes. It is divided into The refrigerant flowing into the inflow tank section flows to one side of the other tank via the upstream tube connected to the inflow tank section, and then the refrigerant flowing to the other side of the other tank is the downstream side. It flows through the tube to the outflow tank portion of the one tank. A cooler pipe is connected to each of the inflow tank portion and the outflow tank portion, and each of the cooler pipes extends from the left side wall portion of the unit case 30 to the outside of the unit case 30 and then extends to the front of the vehicle. Has been formed.

Further, the evaporator 33 is arranged obliquely so that the tube extending direction substantially coincides with the vehicle front-rear direction and the vehicle rear side of the evaporator 33 is located above the vehicle front side. This is an evaporator 33
This is to allow the condensed water generated in the above to flow to the drain portion 35 (described later) in front of the vehicle. The unit case 30
All the air introduced therein passes through the evaporator 33.

When the evaporator 33 cools the air, the condensed water generated in the evaporator 33 is discharged to the outside of the vehicle through the drain portion 35 provided in the bottom wall portion 31 of the unit case 30. . The drain portion 35 is provided with a drain passage integrally formed with the bottom wall portion 31 at a vehicle left side portion of the unit case 30 bottom wall portion 31 on the vehicle front end side, and an upstream end of the drain passage is a unit. The opening faces the case 30 so as to project from the left side wall portion of the unit case 30 to the left side of the vehicle, and the downstream side portion of the drain passage extends to the front side of the vehicle.

Like the evaporator 33, the heater core 34 is composed of laminated tubes and fins, and engine cooling water is circulated in the tubes so that the air passing through the heater core 34 is heated. It has become. Similarly to the cooler pipes of the evaporator 33, the heater core 34 is also provided with heater pipes for inflowing and outflowing the engine cooling water. The heater pipes extend outward from the left side wall of the unit case 30. It is formed so as to extend to the front of the vehicle after extending to.

A bypass passage 38 is provided on the vehicle rear side of the heater core 34 in the unit case 30 so that the air passing through the evaporator 33 bypasses the heater core 34. The bypass passage 38 is provided so as to extend in a substantially vertical direction from an inlet opening 48 provided at substantially the same height as the heater core 34 to an upper wall portion (upper end portion) of the unit case 30.

The heater core 34 is the unit case 3
It is housed in a heating chamber 42 that is partitioned and formed in 0,
The lower wall portion of the heating chamber 42 is located between the evaporator 33 and the heater core 34. And this heating chamber 42
In the rear part of the vehicle in the lower wall part, an inlet port 4 for allowing the air passing through the evaporator 33 to flow into the heating chamber 42.
3 is formed so as to face the inlet opening 48 of the bypass passage 38. Further, an auxiliary inlet 44 for allowing the air passing through the evaporator 33 to flow into the heating chamber 42 together with the inlet 43 is formed in the vehicle front portion of the lower wall portion of the heating chamber 42.

Between the inlet opening 48 of the bypass passage 38 and the inlet 43 of the lower wall portion of the heating chamber 42, the inlet opening 4 is provided.
8 is provided with an air mix damper 36 for adjusting the opening between the inlet 8 and the inlet 43. This air mix damper 36
Is a position (flow direction) in which the inlet opening 48 is fully closed about an axis extending in the vehicle width direction by an actuator 45 arranged on the left side wall of the unit case 30 and an operating mechanism 46 operated by the actuator 45. The inlet 43 is in a fully opened state) and the inlet opening 48 is in a fully opened state (the inlet 43 is in a fully closed state).

An auxiliary inlet opening / closing damper 37 for adjusting the opening of the auxiliary inlet 44 is provided near the lower side of the auxiliary inlet 44 of the lower wall of the heating chamber 42. The auxiliary inlet opening / closing damper 37 is interlocked with the rotation of the air mix damper 36 by the operating mechanism 46, and the auxiliary inlet 44 is fully opened and closed around an axis extending in the vehicle width direction. And the position where the air mix damper 36 is provided.
3 is less than or equal to a predetermined value, the auxiliary inlet 44
On the other hand, when the opening degree of the inflow port 43 is larger than the predetermined value, the opening degree of the auxiliary inflow port 44 is increased as the opening degree is increased. The air mix damper 36 and the auxiliary inlet opening / closing damper 37 adjust the opening degrees of the inlet opening 48, the inlet 43, and the auxiliary inlet 44, so that the bypass passage 38 of the air passing through the evaporator 33 is adjusted. The flow rate ratio of the air flowing into the heating chamber 42 to the air flowing into the heating chamber 42 is adjusted.

In the vicinity of the upper wall portion of the unit case 30 in the bypass passage 38, there is provided a first wall portion passing through the heater core 34 and provided between the bypass passage 38 and the heating chamber 42.
A merging portion 38 a is provided in which the air flowing in through the opening 39 merges with the air flowing in the bypass passage 38. In the upper wall portion of the unit case 30 just above the merging portion 38a of the bypass passage 38, the air in the merging portion 38a communicating with the merging portion 38a is supplied to the instrument panel 2.
A center vent outlet port 50 and a side vent outlet port 51 for leading out to a center ventilator 81 and a side ventilator 82, which are respectively provided at substantially the center portion and the left and right end portions in the vehicle width direction, are opened. That is, the center vent outlet 50 is formed in the substantially central portion of the portion of the vehicle rear portion of the upper wall portion of the unit case 30 which is inclined downward toward the vehicle rear side, and the two side vent outlets 51 are formed on both left and right sides thereof. Has been done. In addition, at a substantially central portion in the vehicle width direction of the center vent outlet 50, a joint portion of the driver seat side portion 32a and the passenger seat side portion 32b in the main body portion 32 of the unit case 30 is located.

The center vent outlet 50 is connected to the center ventilator 81 by a center vent duct 83 provided in the instrument panel 2, and the side vent outlets 51 are also provided in the instrument panel 2. The side vent ducts 84 are connected to the respective side ventilators 82, respectively, and the air in the merging portion 38a of the bypass passage 38 is blown out from the respective ventilators 81, 82 toward the upper body of the occupant.

A defroster outlet chamber 88 is provided above the heating chamber 42 in the unit case 30, and the bypass passage 38 joins the wall portion between the defroster outlet chamber 88 and the bypass passage 38. A second opening 40 is provided for introducing the air in the portion 38a into the defroster outlet chamber 88. The air that has flowed into the defroster outlet chamber 88 (that is, the air in the merging portion 38a of the bypass passage 38) is placed on the upper wall portion of the unit case 30 at a position near the vehicle front side above the defroster outlet chamber 88 (the instrument panel 2 Defroster lead-out ports 52 are formed for leading out to the demisters 85a provided at both left and right ends of the upper surface. That is, in the upper wall portion of the unit case 30, the center vent outlet 5
The defroster outlet 52 is formed over the entire vehicle width direction in a state in which the defroster outlet 52 is away from the front side of the vehicle and the side vent outlet 51. In addition, at a substantially central portion in the vehicle width direction of the defroster outlet 52, a joint portion of the driver seat side portion 32a and the passenger seat side portion 32b in the main body portion 32 of the unit case 30 is located.

The defroster outlet 52 is connected to the defroster 85 (demister 85a) by a defroster duct 89 provided in the instrument panel 2.
From the defroster 85 (demister 85a), the air in the defroster outlet chamber 88 is blown out toward the inner surface of the windshield of the front window or the side door.

A foot lead-out chamber 91 is provided on the vehicle front side of the defroster lead-out chamber 88 in the unit case 30.
A third opening 92 for allowing the air in the defroster outlet chamber 88 to flow into the foot outlet chamber 91 is formed in the wall portion between the foot outlet chamber 91 and the defroster outlet chamber 88. Further, left and right foot outlets for leading the air in the foot outlet chamber 91 to the feet of the occupants in the driver's seat and the passenger seat are provided at the vehicle front end portions of the upper portions of the left and right side wall portions of the unit case 30. 53 are formed respectively. That is, the left and right foot outlets 53 have left and right foot ducts 56, 56 extending downward along the left side wall portion and the right side wall portion of the unit case 30, respectively.
57 is connected, and both of these foot ducts 56 and 57 are
There are openings at the feet of the occupants in the driver's seat and the passenger's seat, respectively.
The air in the foot lead-out chamber 91 is configured to blow out toward the feet of each occupant through the one opening 55).

The right side (driver's seat side) foot duct 57 communicates with two connecting portions 58 connected to a duct (not shown) extending to the rear seat, and the air in the foot outlet chamber 91 is in the rear seat. It also blows off to the feet of the occupants.

In the vicinity of the center vent outlet 50 and the side vent outlet 51 in the unit case 30, the center vent outlet 50 and the side vent outlet 5 depending on the blowing mode set by the vehicle occupant.
One first outlet direction switching damper 60 that simultaneously opens and closes one
Is provided. This first blowing direction switching damper 60
Is the center vent outlet 5 around the axis extending in the vehicle width direction.
0 and the side vent outlet 51 are mutually rotated between a position in which they are fully closed and a position in which they are fully open. The first outlet direction switching damper 60 is located at a position where the center vent outlet 50 and the side vent outlet 51 are fully opened, and the second outlet of the wall portion between the bypass passage 38 and the defroster outlet chamber 88. The part 40 is adapted to be fully closed.

In the vicinity of the defroster outlet 52 in the unit case 30, there is provided a second outlet direction switching damper 61 for opening and closing the defroster outlet 52 according to the outlet mode. The second blowing direction switching damper 61 is configured to rotate about a shaft extending in the vehicle width direction between a position in which the defroster outlet 52 is in a fully closed state and a position in which the defroster outlet 52 is in a fully open state. . The second blowing direction switching damper 61 is located at a position where the defroster outlet 52 is fully opened and the defroster outlet chamber 88 is located in the defroster outlet chamber 88.
The third opening 92 in the wall between the foot outlet chamber 91 and the foot lead-out chamber 91 is fully closed.

The first and second blowing direction switching dampers 6
0 and 61 are rotated by an actuator 63 provided on the left side wall portion of the unit case 30 and an operating mechanism 62 operated by the actuator 63. The vent mode, the defroster mode, the foot mode,
The center vent outlet port 50, the side vent outlet port 51, the defroster outlet port 52, and the third opening portion 92 are provided in accordance with a blowing mode such as a bi-level mode in which the conditioned air is blown from both the ventilators 81 and 82 and the foot of the occupant. Each open / closed state of is switched.

Each side vent outlet 51 and defroster outlet 52 in the upper wall of the unit case 30.
And the blowout mode is a mode other than the mode (vent mode) in which only the center vent outlet 50 and the side vent outlet 51 are opened by the first and second blowout direction switching dampers 60 and 61. The air that has passed through 34 (air in the heating chamber 42) is bypassed through each side vent outlet 51, and each side ventilator 8 described above.
Two left and right auxiliary outlets 54 for leading out to the respective 2 are opened. That is, each auxiliary outlet 54
Is covered by the side vent outlet 50 on the corresponding side as well as the side vent outlet 84 side opening of the side vent duct 84. As described later, the center vent outlet 50 and the side vent outlet 51 are the first outlets. When fully closed by the direction switching damper 60,
Air (mainly heated air) in the merging portion 38a of the bypass passage 38 is led out to the side ventilator 82 from the auxiliary outlet 54.

The opening on the side of the center vent outlet 50 in the center vent duct 83 is the center vent outlet 5.
It is formed to be large on the vehicle front side with respect to the center vent outlet 50 while covering 0. That is, the center vent outlet 5 in the upper wall of the unit case 30
0 and the defroster outlet 52, the auxiliary outlet 54 as described above is not provided, but the opening of the center vent duct 83 on the side of the center vent outlet 50 is the side vent of the side vent duct 84. The size is set to be substantially the same as the opening on the outlet 51 side. This is because the vehicle-mounted component (here, the navigation device 95) is disposed immediately above the center vent outlet 50, and the size of the center vent duct 83 in the vertical direction in the vicinity of the center vent outlet 50 is considerably reduced. Even in such a case, the flow area is increased by enlarging the opening of the center vent duct 83 in the vehicle front-rear direction.
This is for ensuring a sufficient flow rate of air flowing through the center vent duct 83.

As described above, since the opening of the center vent duct 83 on the side of the center vent outlet 50 is formed larger on the vehicle front side than the center vent outlet 50, the center vent outlet 50 and the defroster outlet 82. The fastening portion 30 a located between the above and the above is housed in the center vent duct 83.

In the unit case 30, when viewed from the vehicle front-rear direction, the vehicle width direction center line of the portion excluding the upper end portion (the portion above the heater core 34) of the unit case 30 is the vehicle width of the instrument panel 2. It is arranged so as to be displaced toward the passenger seat side with respect to the center in the direction. That is, the lower part of the unit case 30 from the heater core 34 on the passenger seat side is recessed inward more largely than the driver seat side with respect to the upper part of the heater core 34, and a clutch (left In the case of a wheeled vehicle, the space between the accelerator and its connecting members is secured.
On the other hand, in the portion above the heater core 34, the center line in the vehicle width direction is made substantially coincident with the center in the vehicle width direction of the instrument panel 2, and air of substantially the same flow rate is blown out on the driver side and the passenger side. I am trying to let you.

A pair of case-integrated bracket portions 68 are provided as attachment portions for automobiles on both left and right sides of the air blowing portion 8 of the air blowing unit 3, and the right side of the vehicle is on the right side of the filter arrangement portion 21. A case-integrated bracket portion 69 is provided so as to project obliquely upward toward.
On the other hand, the mounting portion of the air conditioning unit 4 includes a flange 70 integrally formed with the drain portion 35 and a pair of flanges 71 provided on both the left and right sides of the upper portion of the unit case 30.
Consists of.

Through-holes are formed in the flanges 68 to 71 of the blower unit 3 and the air-conditioning unit 4, respectively, while stud bolts are formed in the dash panel P so as to correspond to the positions of the through-holes. Is attached. Further, the dash panel P is formed with through holes corresponding to the positions of the cooler pipe and the heater pipe of the evaporator 33 and the heater core 34, and the drain passage of the drain portion 35. Then, when the blower unit 3 and the air conditioning unit 4 are positioned on the dash panel P by inserting stud bolts into the through holes in the respective flanges 68 to 71, the cooler pipe and the heater pipe are inserted from the through holes of the dash panel P to the engine room. Come to face. In this state, the blast bolt 3 and the air conditioning unit 4 are fixed to the dash panel P by screwing the nuts onto the stud bolts, and the pipes in the engine room are connected to the respective pipes to form a drain. A drain pipe is connected to the drain passage of the portion 35.

Next, the flow of air in the air conditioning unit 4 will be described. First, the fan 23 of the blower unit 3 will be described.
The air blown by the air passes through the intermediate duct 5 and the inlet 2
5 is introduced into the unit case 30.

Subsequently, the air introduced into the unit case 30 flows upward immediately after being introduced and passes through the evaporator 33, and at this time, is cooled by the evaporator 33. If the inlet 43 and the auxiliary inlet 44 of the lower wall portion of the heating chamber 42 and the inlet opening 48 of the bypass passage 38 are all in the open state, a part of the air (cooling air) that has passed through the evaporator 33 is the inlet. 43 and auxiliary inlet 4
4 flows into the heating chamber 42, while the remaining air flows from the inlet opening 48 of the bypass passage 38 to the bypass passage 38.
It flows in and rises.

The air flowing into the heating chamber 42 rises and passes through the heater core 34, and is heated by the heater core 34 at this time, and the heated air (heating air) flows between the bypass passage 38 and the heating chamber 42. First provided on the wall between
The cooling air flowing in the bypass passage 38 flows into the merging portion 38 a of the bypass passage 38 through the opening 39 and merges with the cooling air. The center vent outlet 50 and the side vent outlet 51 have the first outlet direction switching damper 60 as in the case where the outlet mode is the defroster mode or the foot mode.
When it is in a fully closed state due to
The heated air flowing into the a merges with the cooling air flowing in the bypass passage 38, and the heating air and the cooling air are mixed at the merging portion 38a to form a wall between the bypass passage 38 and the defroster outlet chamber 88. Second opening 40 provided in the section
And is introduced into the defroster outlet chamber 88. A part of the air introduced into the defroster outlet chamber 88 is led out to the side ventilator 82 from the auxiliary outlet 54. In addition, the remaining air is discharged to the defroster 85 (demister 85a) from the defroster outlet 52 or the foot outlet chamber 9 from the third opening 92 according to the blowing mode.
After being flowed into the vehicle 1, the vehicle is led out from the foot outlet 53 through the left and right foot ducts 56 and 57 to the feet of the occupants in the driver's seat, the passenger seat, and the rear seat.

On the other hand, when only the center vent outlet 50 and the side vent outlet 51 are in the open state and the second opening 40 is in the fully closed state, as in the case where the blowout mode is the vent mode, the bypass passage is formed. The heated air that has flowed into the confluence portion 38a of 38 merges with the cooling air and is drawn out from the center vent outlet 50 and the side vent outlet 51 to the center ventilator 81 and the side ventilator 82, respectively.

When the center vent outlet 50, the side vent outlet 51, and the second opening 40 are all open as in the bilevel mode, the merging portion 38a of the bypass passage 38 is formed. Part of the heated air that has flowed into the cooling air is merged with the cooling air and is discharged from the center vent outlet 50 and the side vent outlet 51 to the center ventilator 81 and the side ventilator 82, respectively. It is introduced into the defroster outlet chamber 88 through the portion 40, and the side vent outlet port 5
1 is bypassed from the auxiliary outlet 54 to the side ventilator 51, and after flowing into the foot outlet chamber 91 from the third opening 92, it is operated from the foot outlet 53 through the left and right foot ducts 56 and 57. It is also delivered to the feet of the passengers in the seat, passenger seat and rear seat.

Therefore, in the above embodiment, between the side vent outlet 51 and the defroster outlet 52 at the upper end of the unit case 30, at least the heated air is supplied to the side vent outlet when the blowing mode is other than the vent mode. Side ventilator 82 bypassing 51
Since the auxiliary outlet 54 is provided for leading out to the center vent outlet 50 and the side vent outlet 5
1 is closed by the first blowing direction switching damper 60 (when the blowing mode is the defroster mode or the foot mode, etc.), the merging portion 3 of the bypass passage 38 is provided.
The air of 8a is mainly heated air, and even if the flow rate of the cooling air is relatively large, the air is discharged from the auxiliary outlet 54 to the side ventilator 82 in a state where the cooling air and the heated air are sufficiently mixed, The heated air can be stably discharged to the side ventilator 82. On the other hand, when the blowout mode is other than the bench mode and the center vent outlet and the side vent outlet are open (when the blowout mode is the bi-level mode, etc.),
Even if the heated air cannot be stably discharged from the side vent outlet 51 to the side ventilator 82, the heated air is discharged to the side ventilator 82 from the auxiliary outlet 54, so that the temperature suitable for fogging prevention can be obtained. Air can be blown out of the side ventilator 82. As a result, when the blowout mode is other than the vent mode, it is possible to surely prevent the windshield of the side door from being fogged by blowing out air having a temperature and a flow rate suitable for preventing fog from the side ventilator 82.

Further, since the opening of the side vent duct 84 on the side vent lead-out port 51 side covers the side vent lead-out port 51 and the auxiliary lead-out port 54, left and right respectively.
The side vent outlet 51 and the auxiliary outlet 54 can be simultaneously connected to the side ventilator 82 by one side vent duct 84.

Further, since the opening of the center vent duct 83 on the side of the center vent outlet 50 covers the center vent outlet 50 and is formed larger on the vehicle front side than the center vent outlet 50, the center vent is formed. Even if an on-vehicle device such as the navigation device 95 is present immediately above the outlet 50, the center vent duct 8
A sufficient flow rate of the air flowing through 3 can be secured.

Further, the bypass passage 38 has the heater core 3
4 is provided on the vehicle rear side so as to extend in a substantially vertical direction, and has a center vent outlet 50 and a side vent outlet 5.
Since 1 is provided almost directly above the bypass passage 38, the cooling air can be made into a linear air flow, and the energy loss particularly during cooling can be suppressed as much as possible. On the other hand, with such a configuration, it becomes very difficult to stably draw out the heated air from the side vent outlet 51 to the side ventilator 82 when the blowout mode is the bi-level mode or the like, but in this embodiment, Since the auxiliary outlet 54 is provided as described above, there is no problem at all.

In addition, the main body 32 of the unit case 30
Since one of the plurality of fastening portions 30a for fastening the driver seat side portion 32a and the passenger seat side portion 32b in the above with a screw is provided between the center vent outlet 50 and the defroster outlet 52. The strength of the vicinity of the center vent outlet 50 and the defroster outlet 52 that straddle the driver side 32a and the passenger side 32b can be sufficiently secured, and the center vent outlet 50 and the vicinity of the defroster outlet 52 can be secured. It is possible to prevent the air from leaking to the outside of the unit case 30 through a gap at the joint between the driver seat side portion 32a and the passenger seat side portion 32b. Further, since the fastening portion 30a is provided so as to project to the outside of the unit case 30, the fastening portion 30a
Compared with the case where a is provided inside the unit case 30, the fastening work with screws becomes easier and the inner space can be secured to the maximum. Further, between the center vent outlet 50 and the defroster outlet 52,
Since it is not necessary to provide the auxiliary outlet 54, the fastening portion 30a
It is possible to secure a sufficient space for providing the projecting state outside the unit case 30.

Although the air conditioner 1 is mounted on the right-hand drive vehicle in the above embodiment, it may be installed on the left-hand drive vehicle. In this case, the air conditioner 1 may be configured so that the left and right are in a relationship that is substantially opposite to that of the above embodiment.

[0064]

As described above, according to the vehicle air conditioner of the present invention, the blowout mode is controlled by the blowout direction switching damper between the side vent outlet and the defroster outlet at the upper end of the unit case. Provide an auxiliary outlet for bypassing at least the air that has passed through the heating heat exchanger to the side ventilator by bypassing the side vent outlet when the mode other than the mode in which only the outlet and the side vent outlet are opened Therefore, when the blowing mode is other than the vent mode, it is possible to surely prevent the fogging of the windshield of the side door by blowing the air having a temperature and a flow rate suitable for preventing fogging from the side ventilator.

[Brief description of drawings]

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

FIG. 2 is a perspective view of the vehicle air conditioner seen from a direction different from that in FIG.

FIG. 3 is a view of the vehicle air conditioner viewed from the vehicle rear side.

FIG. 4 is a perspective view showing an instrument panel.

FIG. 5 is a view corresponding to FIG. 3 showing an outline of a vehicle air conditioner.

FIG. 6 is a vertical cross-sectional view of an air conditioning unit of the vehicle air conditioner.

[Explanation of symbols]

1 Vehicle air conditioner 2 Instrument panel 23 Centrifugal multi-blade fan (blower) 25 entrance 30 unit case 30a fastening part 32a driver's side 32b passenger side 33 Evaporator (cooling heat exchanger) 34 Heater core (heat exchanger for heating) 38 Bypass passage 38a Confluence part 50 Center vent outlet 51 Side vent outlet 52 Defroster outlet 54 Auxiliary outlet 60 First blowing direction switching damper 61 Second blowing direction switching damper 81 Center ventilator 82 Side ventilator 83 Center vent duct 84 Side vent duct 85 Defroster

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Koji Aso             3-11 Yoshikawa Industrial Park, Higashihiroshima City, Hiroshima Prefecture             In ceremony company Japan Climate Systems (72) Inventor, Taisuke Takenoshita             3-11 Yoshikawa Industrial Park, Higashihiroshima City, Hiroshima Prefecture             In ceremony company Japan Climate Systems F-term (reference) 3L011 BJ00

Claims (5)

[Claims] 1. A unit case disposed in a central portion in a vehicle width direction inside an instrument panel provided in a vehicle compartment of an automobile, and air blown by a blower into the unit case, the unit case being opened. An inlet for introducing air, a cooling heat exchanger that is disposed above the inlet in the unit case and cools the air introduced from the inlet by passing it, and the inside of the unit case And a heating heat exchanger which is disposed above the cooling heat exchanger and heats by passing the air passing through the cooling heat exchanger, and a vehicle of the heating heat exchanger in the unit case. A bypass passage that is provided on the rear side and that allows the air that has passed through the cooling heat exchanger to flow by-passing the heating heat exchanger; and a bypass passage that is provided in the bypass passage. The air passing through the exchanger is opened at the confluence portion where the air flowing through the bypass passage merges with the converging portion at the upper end of the unit case in the vehicle width direction. A center vent outlet and a side vent outlet for leading out to the side ventilator, respectively, and an opening at the upper end of the unit case away from the center vent outlet and the side vent outlet toward the vehicle front side, and the bypass passage. The defroster outlet for discharging the air in the confluence part of the vehicle to the defroster, and the blowing direction switching that opens and closes at least the center vent outlet, side vent outlet, and defroster outlet according to the blowing mode set by the vehicle occupant. A vehicle air-conditioning system equipped with a damper, comprising: At a portion other than the mode in which only the center vent outlet and the side vent outlet are opened by the outlet direction switching damper, the outlet is opened between the side vent outlet and the defroster outlet in the section. An air conditioner for a vehicle, comprising: an auxiliary outlet port for bypassing the side vent outlet port and leading the air that has passed through the heating heat exchanger to the side ventilator. 2. The vehicle air conditioner according to claim 1, further comprising a center vent duct connecting the center vent outlet and the center ventilator, and a side vent duct connecting the side vent outlet and the side ventilator, The side vent outlet side opening of the side vent duct covers the side vent outlet port and the auxiliary outlet port, and the center vent outlet port side opening of the center vent duct covers the center vent outlet port and the center vent outlet port. An air conditioner for a vehicle, wherein the air conditioner is formed to be large on the front side of the vehicle with respect to the outlet. 3. The vehicle air conditioner according to claim 1, wherein the bypass passage is provided so as to extend in a substantially vertical direction on the vehicle rear side of the heating heat exchanger, and the center vent outlet port and the side vent guide port are provided. An outlet for air conditioning is provided right above the bypass passage. 4. The vehicle air conditioner according to any one of claims 1 to 3, wherein the unit case is a center line in a vehicle width direction of a portion excluding an upper end portion of the unit case when viewed from the vehicle front-rear direction. Is disposed so as to be displaced toward the passenger seat side with respect to the center of the instrument panel in the vehicle width direction. 5. The vehicle air conditioner according to any one of claims 1 to 4, wherein the unit case has a driver seat side portion and a passenger seat side portion divided into two in the vehicle width direction. , A plurality of fastening portions for fastening the driver seat side portion and the passenger seat side portion with screws, and at least one of the plurality of fastening portions is provided between the center vent outlet and the defroster outlet. In the vehicle air conditioner, the vehicle air conditioner is provided so as to project to the outside of the unit case.