JPH11342720A - Air-conditioning unit and car air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To secure a stable opening according to the flow velocity of the outside air introduced, and to obtain the stable opening even if an inside air inlet port is disposed so as to become approximately horizontal when it is fully closed. SOLUTION: This air-conditioning unit is provided with an inside-outside air selector damper 12 which opens an inside air inlet port 11b and an outside air inlet port 11a and selectively switching the inlet air to either of inside air (b) or outside air (a). Then an auxiliary inlet 12a is opened in the one part and an auxiliary damper 13 is attached to it, while it is formed into an inside- outside air box 10 provided with an air receiving plate 15 which receives a flow of the introduced outside air and makes this auxilairy damper 13 operate in the opening direction, and connected to a blower unit and a heater unit, thereby constituting this air-conditioning unit.

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, which is installed in a vehicle such as an automobile and performs air conditioning such as cooling and heating in a passenger compartment.

[0002]

2. Description of the Related Art A vehicle air conditioner capable of providing a comfortable cabin environment for an occupant by air conditioning the interior of a vehicle such as an automobile is provided with a blower fan, a heater core for heating, and various dampers. An air-conditioning unit, a heating source system for introducing high-temperature engine cooling water to a heater core in the air-conditioning unit, and a control unit for controlling the operation of the vehicle air-conditioning apparatus according to various conditions such as temperature and occupant preferences. It consists of. The vehicle air conditioner is provided with a cooling device as required. In this case, an evaporator is installed in the air conditioning unit, and a refrigerant system for supplying a low-temperature and low-pressure liquid refrigerant to the evaporator is added.

FIG. 9 shows a configuration of a conventional air conditioning unit. This air-conditioning unit is an example of what is installed in a general passenger car. In this case, the air-conditioning unit 1 includes an inside / outside air box 10, a blower unit 20,
The air conditioner includes a cooler unit 30 and a heater unit 40, and is installed in an engine room below a dashboard on a passenger seat side when viewed from a vehicle interior side. Hereinafter, the air conditioning unit 1 will be briefly described in the order of air flow.

The air introduced into the air conditioning unit 1 is supplied to the outside air (air outside the vehicle compartment) by opening and closing the inside / outside air switching damper 12 in the inside / outside air box 10.
Alternatively, one of the inside air (air in the vehicle compartment) b is selected. The external air a or the internal air b (hereinafter referred to as “introduced air”) to be introduced is sucked by a blower fan 21 provided in the blower unit 20 or as a traveling wind of the vehicle.
The air is sent to the evaporator 31 in the cooler unit 30 installed downstream of the blower fan 21 through the air conditioning duct AD. The evaporator 31 is supplied with a low-temperature and low-pressure liquid refrigerant from a refrigerant system during the cooling operation, and can perform cooling and dehumidification by exchanging heat with the introduced air passing through the evaporator 31.

[0005] A heater unit 40 is provided downstream of the evaporator 31, and a heater core 42 is provided inside the heater unit 40. During the heating operation, high-temperature engine cooling water is introduced into the heater core 42, and heat can be exchanged with air introduced through the heater core 42 to perform heating. Further, the flow rate of the introduced air passing through the heater core 42 can be adjusted by the opening degree of the air mix damper 43. As a result, the introduced air is adjusted to a desired temperature in the heater unit 40, or
Dampers 4 for the outlets 44, 45, 46 provided in the
By interlocking with the opening and closing operations of 4a, 45a, 46a, so-called head cold foot heat, in which warm air is blown to the feet at the same time as blowing cold air not passing through the heater core 42 to the occupant's head, is also possible.

In such an air conditioning unit 1, a heater core 42 for heating is disposed downstream of the evaporator 31 for cooling and dehumidification. Therefore, the cooled and dehumidified introduced air is reheated to an appropriate temperature. This has the advantage that the temperature can be maintained and the fogging of the windows can be cleared.

[0007]

However, in the above-mentioned conventional air conditioner unit, for example, in a defrost operation mode in which the windshield is defrosted,
When the heating operation is performed by introducing outside air, the heating capacity of the heater core 42 may be insufficient and sufficient heating may not be performed. Since such a problem occurs in a cold region where the outside air temperature is particularly low, for example, the air conditioner unit 1 for a vehicle called a cold region specification has the following countermeasures.

FIG. 10 shows the inside / outside air box 10, the blower unit 20 and the cooler unit 30 of the air conditioner unit 1 mounted on a cold district specification vehicle. The inside / outside air switching damper 12 has an auxiliary damper 13 attached thereto. Have been.
When the outside air a is introduced, the auxiliary damper 13 switches the inside / outside air switching damper 1 that keeps the inside air introduction port 11b in a fully closed state.
2, the auxiliary air inlet 12a is opened, and warm air in the passenger compartment is also introduced to increase the temperature of the introduced air and reduce the load on the heater core 42. . The auxiliary damper 13 is swingably supported by a shaft 13a, and normally closes the auxiliary inlet 12a by its own weight.

However, since the auxiliary damper 13 having the above-described configuration is opened by a pressure difference generated by the flow rate of the outside air a introduced from the outside air inlet 11a, the opening degree tends to be unstable. Therefore, auxiliary inlet 1
There is a problem that the amount of inside air a introduced from 2a is not stable. For this reason, the temperature of the introduced air that passes through the heater core 42 and is heated also becomes unstable. Therefore, in order to provide a comfortable vehicle interior environment, improvement of the auxiliary damper 13 has been desired.

When the inside / outside air switching damper 12 at the time of introducing outside air is vertical or almost vertical, the weight of the auxiliary damper 13 mounted in parallel with the vertical damper does not significantly affect the opening / closing operation due to the pressure difference. Absent. However, when the inside / outside air switching damper 12 that completely closes the outside air introduction port 11b forms an inclined surface, that is, there is a fulcrum supported by the shaft 12b on the outside air introduction port 11a side (upstream side), and the blower fan 21 side The swinging tip of the shaft 12
In the case where an inclined surface located inside the inside / outside air box 10 (in the direction of opening the damper on the right side of the paper) from the line hanging down from b is formed, the weight of the auxiliary damper 13 greatly affects the opening / closing operation. Therefore, as the angle of the inclined surface increases and approaches the horizontal, the auxiliary damper 13 is only driven by the above-described pressure difference.
It becomes a difficult situation to open.

Therefore, the present invention can provide a stable opening degree in accordance with the flow velocity of the introduced outside air, and can be arranged so that the inside air introduction port has an inclined surface which is nearly horizontal when fully closed. It is an object of the present invention to provide an air conditioner for a vehicle in which an auxiliary damper capable of obtaining a stable opening degree is provided in an inside / outside air switching damper.

[0012]

In order to solve the above problems, the present invention employs the following means. Claim 1
The air-conditioning unit described in (1) is provided with an inside / outside air switching damper that opens the inside air intake port and the outside air intake port and selectively switches the introduced air to either the inside air or outside air, and assists a part of the inside / outside air switching damper. An inside / outside air box provided with an aerodynamic urging means for opening the introduction port and attaching the auxiliary damper, and receiving the flow of the outside air introduced from the outside air introduction port to operate the auxiliary damper in the opening direction; and A blower unit provided with a blower fan that sucks and blows air downstream, a heater core that is installed in a heater unit case and heats the introduced air that passes therethrough, and air that adjusts a flow rate of the introduced air that passes through the heater core A heater unit comprising a mix damper and a plurality of outlets opened to the heater unit case and each provided with a damper. When and is characterized by being configured by connecting. In the case of an air conditioning unit having a cooling function, a cooler unit in which an evaporator for exchanging heat between the refrigerant and the introduced air passing through the cooler unit case is added.

According to such an air conditioning unit, since the aerodynamic biasing means which receives the flow of the outside air when the outside air is introduced opens the auxiliary damper, a partly warm inside air is introduced in addition to the low temperature outside air. , The temperature of the introduced air can be increased. Further, since the aerodynamic urging means urges the auxiliary damper in the opening direction according to the flow rate of the outside air, a stable damper opening can be maintained.

According to a second aspect of the present invention, there is provided an air conditioner for a vehicle,
An inside / outside air switching damper is provided for opening the inside air intake port and the outside air intake port to selectively switch the introduced air to either the inside air or outside air, and an auxiliary introduction port is opened to a part of the inside / outside air switching damper to provide an auxiliary damper. And an inside / outside air box provided with aerodynamic urging means for receiving the flow of the outside air introduced from the outside air introduction port and operating the auxiliary damper in the opening direction, and sucking the introduced air and blowing it to the downstream side. A blower unit provided with a blower fan, a heater core installed in a heater unit case for heating the introduced air passing therethrough, an air mix damper for adjusting a flow rate of the introduced air passing through the heater core, and the heater unit case And a heater unit comprising a plurality of blowout ports each having a damper, and a heater unit having a plurality of blowout ports each having a damper. And add units and is characterized with a heating source system which introduces engine cooling water to the heater core, and a control unit for controlling the operation of the air conditioning unit and the heat source system, by being configured by. In the case of an air conditioner having a cooling function, a compressor for compressing a gaseous refrigerant, a condenser for exchanging heat of a high-pressure gas refrigerant with outside air and condensing, and a low-temperature and low-pressure A refrigerant system including an expansion valve for converting to a liquid refrigerant is added, and a low-temperature and low-pressure liquid refrigerant is supplied to an evaporator provided in addition to the air conditioning unit.

According to such a vehicle air conditioner,
In the air conditioning unit, the aerodynamic biasing means receiving the flow of the outside air at the time of introducing the outside air opens the auxiliary damper, so that in addition to the low-temperature outside air, a part of the warm inside air is also introduced, thereby increasing the temperature of the introduced air. be able to. Further, since the aerodynamic urging means urges the auxiliary damper in the opening direction according to the flow rate of the outside air, a stable damper opening can be maintained.

According to a third aspect of the present invention, there is provided an air conditioner for a vehicle.
The vicinity of the lower end of the auxiliary damper is swingably supported by the inside / outside air switching damper, and the aerodynamic urging means urges the lower end of the auxiliary damper in a direction of pressing down to open the auxiliary introduction port. It is a feature.

According to such a vehicle air conditioner,
Since the auxiliary damper is urged in the downward direction, the auxiliary damper is less affected by the weight of the auxiliary damper. Therefore, the auxiliary damper can be opened with a relatively small urging force.

According to a fourth aspect of the present invention, there is provided an air conditioner for a vehicle,
The aerodynamic biasing means is a wind receiving plate protruding inward in a closed state from the lower end of the auxiliary damper substantially perpendicularly to the flow direction of the outside air.

According to such a vehicle air conditioner,
Since the wind receiving plate receiving the flow of the outside air pushes down the lower end of the auxiliary damper, the auxiliary damper swings around the shaft and the upper end is lifted and opened.

According to a fifth aspect of the present invention, there is provided an air conditioner for a vehicle,
The upper end of the auxiliary damper is swingably supported by the inside / outside air switching damper, and the aerodynamic urging means attached to the lower end of the auxiliary damper urges the lower end of the auxiliary damper in the pulling-up direction. And opening the auxiliary introduction port.

According to such a vehicle air conditioner,
Since the aerodynamic urging means receiving the flow of the outside air provides a lift in the direction of lifting the lower end of the auxiliary damper, the auxiliary damper swings around the shaft on the upper end side, and the lower end side is lifted and opened.

A vehicle air conditioner according to claim 6 is
The aerodynamic biasing means is a western kite attached to the auxiliary damper via a universal joint.

According to such a vehicle air conditioner,
The auxiliary damper can be pulled up and opened with the force of the Western kite that has received the flow of outside air trying to rise. In addition, the presence of the universal joint allows the attitude of the western kite to be changed according to the flow direction of the outside air.

The vehicle air conditioner according to claim 7 is
The aerodynamic biasing means may be a lift generating body attached to the auxiliary damper by forming an outside air passage. Note that specific lift generators include wings, inclined plates, kite-shaped members, and the like.

According to such a vehicle air conditioner,
The auxiliary damper can be pulled up and opened by the lift generated by the lift generator receiving the flow of the outside air.

[0026]

Embodiments of the present invention will be described below with reference to the drawings. FIGS. 1 to 3 are diagrams showing the configuration of an air conditioner for a vehicle according to the present invention. The air conditioner for a vehicle mainly includes an air conditioning unit 1 for performing air conditioning such as cooling and heating, and an air conditioning unit for cooling operation. It is composed of a refrigerant system 2 for supplying a refrigerant to the unit 1, a heating source system 3 for supplying an engine cooling water as a heat source to the air conditioning unit 1 during a heating operation, and a control unit 4 for controlling the operation of the entire apparatus. I have.

As shown in FIG. 1, the air-conditioning unit 1 has an inner and outer air box 10, a blower unit 20, a cooler unit 30, and a heater unit 40 integrally connected as a first embodiment. This air conditioning unit 1
In the case of a general passenger car, as shown in FIG. 2 and FIG. 3, it is disposed horizontally on the left passenger side as viewed from the vehicle interior, and at the rear of the engine room 6 located below the dashboard 5. I have. Hereinafter, the air conditioning unit 1 will be described in the order of air flow.

The first inside / outside air box 10 is a portion having a function of selectively switching the air introduced into the air conditioning unit 1 to either the outside air (air outside the vehicle compartment) a or the inside air (air inside the vehicle compartment) b. is there. Here, an outside air introduction port 11a communicating with the outside of the vehicle compartment and an inside air introduction port 11b communicating with the inside of the vehicle interior are shown.
One of the inlets 11a and 11b is closed by the inside / outside air switching damper 12, and the air to be introduced (hereinafter, referred to as introduced air) is selected. Further, the inside / outside air switching damper 12 is provided with an auxiliary damper 13 with an opening at the auxiliary introduction port 12a so as to be opened when the outside air a is introduced so as to partially take in the inside air b. This auxiliary damper 13
In order to receive the bias in the opening direction by the flow of the introduced outside air a,
An aerodynamic urging means described later is provided. As a result, the inside / outside air switching damper 12 has a double damper structure including the auxiliary damper 13 which is opened by the action of the aerodynamic urging means.

The blower unit 20 is provided downstream of the inside / outside air box 10 and has a function of selectively sucking outside air a or inside air b by the operation of the blower fan 21 to blow air to a cooler unit 30 described later. doing. The blower fan 21 uses an electric motor 22 as a driving source, and generally can switch a plurality of air volumes in addition to a stop position. When the outside air a is introduced while the vehicle is running, the outside air a, which is the running wind, can flow to the cooler unit 30 even when the blower fan 21 is stopped. Further, depending on the air conditioning unit 1, the blower unit 20 may be installed on the downstream side of the cooler unit 30 described later.

The cooler unit 30 includes the blower unit 2
It has a function of cooling and dehumidifying the introduced air blown from zero. The cooler unit 30 includes an evaporator 31 that is a heat exchanger, and a cooler unit case 32 that stores the evaporator 31. The evaporator 31 receives supply of a low-temperature and low-pressure liquid refrigerant from a refrigerant system 2 described later during cooling operation, and exchanges heat between the introduced air that is blown from the blower unit 20 and passes through the evaporator 31 and the liquid refrigerant. As a result,
The introduced air is deprived of heat by the refrigerant and becomes cooled and dehumidified cold air, which is guided to the heater unit 40. The cooler unit case 32 has an upstream end connected to the blower unit 20 and a downstream end connected to the heater unit 40 to form a part of an air conditioning duct AD serving as a flow path for the introduced air. Resin molded parts. When the cooler unit 30 does not require the cooling / dehumidifying function, the evaporator 31 is not installed, and the cooler unit case 32 is not provided.
Only the inlet air flow path is provided.

The heater unit 40 includes the cooler unit 3
It has a function of selectively heating the introduced air sent from 0 and blowing out the conditioned air from the outlet corresponding to the operation mode. This heater unit 4
Reference numeral 0 denotes a heater core 42 installed inside the heater unit case 41, an air mix damper 43 for adjusting the flow rate of the introduced air passing through the heater core 42, and a damper which is open to the heater unit case 41 and can be opened and closed. Outlet 4 provided with 44a, 45a, 46a
4, 45, and 46. The upstream end of the heater unit case 41 has the cooler unit 30.
And forms a part of the air conditioning duct AD. The heater unit case 41 is provided with a defroster outlet 44, a face outlet 45, and a foot outlet 46, and a defroster damper 44a, a face damper 45a, and a foot damper 46a are attached to each outlet. Heater core 4
The heating unit 2 receives a supply of high-temperature engine cooling water from a heating source system 3 described later during a heating operation, and heats the introduced air blown from the cooler unit 30. The introduced air sent to the heater unit 40 is heated through the heater core 42 according to the opening degree of the air mix damper 43,
They are classified as those that do not pass through the heater core 42.

The above-mentioned defroster outlet 44 is provided with hot air and dehumidified air to directly hit the inner surface of the windshield or the like in order to remove defrost on the windshield before running in winter and to remove fogging of the windshield during running in rainy weather. This air-conditioning operation mode is called a defroster blowing mode. The face outlet 45 blows cold air toward the upper body of the occupant mainly during a cooling operation in summer, and such an air-conditioning operation mode is called a face outlet mode.
The foot outlet 46 blows out warm air to the feet of the occupant mainly during a heating operation in winter, and is called a foot outlet mode. Note that there is also an air-conditioning operation mode called a bi-level blowing mode, which is mainly used in the middle period of spring or autumn, and blows air-conditioned air from both the face outlet 45 and the foot outlet 46. In this case, the face outlet is used. Generally, the wind blown from the head 45 is head cold foot heat at a lower temperature than the foot outlet 46.

Next, the structure of the refrigerant system 2 will be described with reference to FIG. The refrigerant system 2 supplies a low-temperature and low-pressure liquid refrigerant to the evaporator 31, and includes a compressor 51, a condenser 52, a receiver 53, and an expansion valve (not shown). When the cooling / dehumidifying function is not required, installation of the refrigerant system 2 is omitted together with the evaporator 31 described above. The compressor 51 compresses the low-temperature and low-pressure gas refrigerant vaporized by removing heat in the cabin by the evaporator 31 and converts the low-temperature and low-pressure gas refrigerant into a condenser
It is sent to. For automotive air conditioners,
The compressor 51 normally receives a driving force from the engine 54 via a belt and a clutch. The capacitor 52 is
The compressor 51 is provided in front of the engine room 6.
The high-temperature and high-pressure gas refrigerant supplied from the above is cooled by outside air to condense and liquefy the gaseous refrigerant. The liquefied refrigerant is sent to the receiver 53 to separate gas and liquid, and sent to an expansion valve (not shown) as a high-temperature and high-pressure liquid refrigerant. The expansion valve decompresses and expands the high-temperature and high-pressure liquid refrigerant into a low-temperature and low-pressure liquid (mist-like) refrigerant and supplies the refrigerant to the evaporator 31. The expansion valve is usually installed at an appropriate place in the cooler unit 30 together with the evaporator 31.

Next, the configuration of the heating source system 3 will be briefly described with reference to FIG. The heating source system 3 includes a heater core 42
To supply high-temperature engine cooling water as a heat source to
A part of an engine cooling water system circulating between the engine 54 and the radiator 55 is flow-controlled by a water valve 56 to be introduced into the air conditioner.

Finally, the configuration of the control unit 4 will be briefly described. The control unit 4 controls the operation of the air conditioning unit 1, the refrigerant system 2, and the heating source system 3 that constitute the air conditioning apparatus. Usually, a control circuit is provided on an operation panel 57 on which an occupant performs various settings. And installed at the center of the instrument panel 7. The control unit 4 can perform switching operation of the inside / outside air switching damper 12, selection switching of various operation modes, switching of the air volume of the blower fan 21, and desired temperature setting operation.

In the air conditioning unit 1 described above, the inside / outside air switching damper 12 provided in the inside / outside air box 10 has a double damper structure provided with an auxiliary damper 13 which opens by the action of the aerodynamic urging means. ing. Therefore, the inside / outside air switching damper 12 and the auxiliary damper 13
Will be described in detail with reference to FIG. 4 and FIG.

FIG. 4 is a diagram schematically showing a cross section of a main part of the inside / outside air box 10, in which reference numeral 11a denotes an outside air inlet, 11b denotes an inside air inlet, 12 denotes an inside / outside air switching damper, and 13 denotes an auxiliary damper. ing. In this embodiment, the inside air inlet 11b
Are opened on the inclined wall surface 10a of the inside / outside air box 10. In the inclined wall surface 10a, the downstream side of the introduced air is inclined toward the inside of the inside / outside air box 10. Inside / outside air switching damper 12
Is pivotally supported at its upper end by a shaft 12b, which is connected to a damper opening / closing operation mechanism (not shown). Accordingly, the inside / outside air switching damper 12 is substantially horizontal by the operation of the damper opening / closing operation mechanism, and the inside air introduction position where the outside air introduction port 11a is fully closed, and the inside air introduction port 11b which is parallel to the inclined wall surface 10a.
Can be swung between the outside air introduction position and the outside air closing position.

The inside / outside air switching damper 12 described above includes:
An auxiliary inlet 12a penetrating near the center is provided. A rib 12c protrudes around the entire periphery of the auxiliary inlet 12a, and an insulation 14 slightly higher than the rib 12c is attached to the outer periphery of the rib 12c. At the lower end of the auxiliary inlet 12a, an auxiliary damper 13 is attached to a rib 12c of the inside / outside air switching damper via a shaft 13a so as to be swingable. The auxiliary damper 13 is larger than the opening area of the auxiliary inlet 12a, and can be fully closed by its own weight by supporting the lower side of the inclined surface. Although not shown, a stopper is provided at an appropriate position to limit the opening of the auxiliary damper 13. FIG.
Are the auxiliary damper 13 and the inside / outside air switching damper 12 when fully closed.
The end of the auxiliary damper 13 comes into contact with the insulation 14 at a position higher than the rib 12c. As a result, the interference sound when the auxiliary damper 13 is closed can be eliminated.

The auxiliary damper 13 described above is provided with a wind receiving plate 15 as aerodynamic biasing means. The air receiving plate 15 is arranged so as to be substantially perpendicular to the flow of the outside air introduced from the lower end of the auxiliary damper 13 in the closed state.
It protrudes toward the inside of. As a result, the center of gravity of the auxiliary damper 13 moves downward and is inclined in the closed state, so that the weight of the auxiliary damper 13 itself does not easily act in a direction that hinders the opening operation. Therefore, when the flow of the outside air hits the wind receiving plate 15, the auxiliary damper 1
3, the lower end is pushed down with the shaft 13a as a fulcrum, and the upper end is lifted away from the insulation 14, so that the auxiliary inlet 12a is opened and a part of the inside air is introduced. During the opening operation of the auxiliary damper 13, a pressure difference generated between the inside and the outside of the inside / outside air box 10 also assists the opening operation of the auxiliary damper 13.

FIG. 6 shows a second embodiment in which the upper end of an auxiliary damper 13 is swingably attached to an inside / outside air switching damper 12 by a shaft 13a. The aerodynamic urging means in this case is the western kite 16 attached to the lower end of the auxiliary damper 13. The kite 16 includes universal joints 17 provided at both ends of an arm 17.
Since it is mounted via the a and 17b, the posture can be freely changed with respect to the flow direction of the introduced outside air. Therefore, the lower end of the auxiliary damper 13 is raised by raising the western kite 16 which has received the flow of the outside air, so that the auxiliary introduction port 12a is opened to allow a part of the inside air to be introduced. In addition, Western kite 1
6, the posture changes in accordance with the flow of the outside air as the auxiliary damper 13 opens, so that a stable opening degree can be maintained.

FIG. 7 shows a third embodiment.
The aerodynamic urging means is different from that of the second embodiment shown in FIG. In this case, a lift generator 19 that forms an outside air passage 18 is provided at the lower end of the auxiliary damper 13.
The outside air passage 18 is formed between the surface of the auxiliary damper 13 and the lift generator 19, and generates a force in the direction in which the lift generator 19 lifts the lower end of the auxiliary damper 13 by the outside air flowing through the passage. As the lift generator 19 for generating such a lift, for example, a wing as shown in FIG. 8A, an inclined plate as shown in FIG.
There is a kite-shaped member as shown in FIG.

In the vehicle air conditioner thus configured, by driving the blower fan 21, the outside air a
Alternatively, the inside air b is introduced into the air conditioning duct AD from the outside air introduction port 11a or the inside air introduction port 11b of the inside / outside air box 10, and the introduced air passes through the blower unit 20 and passes through the air conditioning duct A.
The inside of D is sent to the cooler unit 30 on the downstream side. For example, when operating in a defroster blowing mode in which the windshield is fogged in winter, the inside / outside air switching damper 12 closes the inside air introduction port 11b and introduces cold outside air a. Since the aerodynamic urging means such as 15 opens the auxiliary damper 13, a relatively warm inside air b is also partially introduced. As a result, the temperature of the introduced air rises due to the mixture of cold outside air and relatively warm inside air,
The burden on the heater core 42 is reduced. In addition, since the aerodynamic urging means urges the auxiliary damper 13 in the opening direction, it is possible to maintain a stable opening degree of the auxiliary damper 13 and perform stable air conditioning, and it is mounted on a nearly horizontal inclined surface. The stable opening can be maintained for the inside / outside air switching damper 12.

[0043]

According to the present invention described above, the following effects can be obtained. According to the air conditioning unit of the first aspect, since the aerodynamic urging means urges the auxiliary damper in the opening direction, a stable opening can be maintained. For this reason, it is possible to stably introduce warm inside air, and it is possible to reliably increase the temperature of the introduced air.

According to the vehicle air conditioner of the second aspect, the temperature of the introduced air can be reliably raised, so that a high heating capacity can be obtained even in a cold region, and This has the effect of significantly improving the marketability of the air conditioner and the vehicle equipped with the air conditioner.

According to the vehicle air conditioner of the third aspect, since the auxiliary damper is hardly affected by its own weight,
The auxiliary damper can be reliably and stably opened by the extremely small aerodynamic bias.

According to the vehicle air conditioner of the fourth aspect, it is possible to obtain an aerodynamic bias that opens the auxiliary damper with a simple structure and reliably.

According to the air conditioner for a vehicle according to the fifth aspect, aerodynamic bias is exerted by the flow of the introduced air.
The auxiliary damper can be reliably and stably opened.

According to the vehicle air conditioner of the present invention, the lift of the kite acts as an aerodynamic bias, and the universal joint keeps the kite in the best direction with respect to the flow of introduced air. Therefore, the auxiliary damper can be reliably and stably opened.

According to the vehicle air conditioner of the present invention, since the lift generator applies aerodynamic bias, the auxiliary damper can be opened reliably and stably.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view illustrating a structure of an air conditioning unit according to an embodiment of the present invention.

FIG. 2 is a perspective view of an engine room of the vehicle, showing an outline of a configuration and an arrangement of the vehicle air conditioner.

FIG. 3 is a perspective view showing an installation example of a vehicle air conditioning unit as viewed from a passenger compartment side.

FIG. 4 is a sectional view showing a configuration of an inside / outside air switching damper and an auxiliary damper according to the first embodiment of the present invention.

5 is an enlarged view of a portion A in FIG. 4;

FIG. 6A is a cross-sectional view of an inside / outside air switching damper and an auxiliary damper according to a second embodiment of the present invention, and FIG. 6B is a perspective view illustrating an appearance of a western kite.

FIG. 7 is a sectional view showing a configuration of an inside / outside air switching damper and an auxiliary damper according to a third embodiment of the present invention.

FIG. 8 is a view showing a specific example of the aerodynamic urging means of FIG. 7;
(A) shows a wing, (b) shows an inclined plate, and (c) shows a kite-shaped member.

FIG. 9 is a cross-sectional view illustrating a structure of an air conditioning unit according to a conventional example.

FIG. 10 is an enlarged sectional view showing the inside and outside air box and the blower unit of FIG. 9;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Air conditioning unit 2 Refrigerant system 3 Heat source system 4 Control part 10 Inner / outer air box 12 Inner / outer air switching damper 13 Auxiliary damper 15 Air receiving plate (aerodynamic urging means) 16 Yo kite (aerodynamic urging means) 17a, 17b Universal joint 19 Lift generator 20 Blower unit 21 Blower fan 30 Cooler unit 40 Heater unit

Claims (7)

[Claims] An inside / outside air switching damper is provided for opening and closing an inside air intake port and an outside air intake port to selectively switch introduced air to either inside air or outside air, and an auxiliary introduction port is provided in a part of the inside / outside air switching damper. Opening and attaching an auxiliary damper, an inner / outer air box provided with aerodynamic urging means for operating the auxiliary damper in the opening direction by receiving the flow of the external air introduced from the external air inlet, and sucking the introduced air. A blower unit provided with a blower fan that blows downstream, a heater core installed in a heater unit case to heat the introduced air passing therethrough, and an air mix damper that adjusts a flow rate of the introduced air passing through the heater core. And a heater unit having a plurality of outlets each having a damper, each opening to the heater unit case. Air conditioning unit, characterized in that the configuration was. 2. An inside / outside air switching damper for opening and closing the inside air intake port and the outside air intake port to selectively switch the introduced air to either the inside air or the outside air, and an auxiliary introduction port is provided in a part of the inside / outside air switching damper. Opening and attaching an auxiliary damper, an inner and outer air box provided with aerodynamic urging means for receiving the flow of the external air introduced from the external air inlet and operating the auxiliary damper in the opening direction, and sucking the introduced air. A blower unit provided with a blower fan that blows air downstream, a heater core installed in a heater unit case to heat the introduced air passing therethrough, and an air mix damper that adjusts a flow rate of the introduced air passing through the heater core. And a heater unit having a plurality of outlets each having a damper, each opening to the heater unit case. A vehicle air conditioner comprising: a configured air conditioning unit; a heating source system that introduces engine cooling water into the heater core; and a control unit that controls operation of the air conditioning unit and the heating source system. apparatus. 3. The auxiliary damper is supported by the inside / outside air switching damper so as to be pivotable in the vicinity of a lower end of the auxiliary damper, and the aerodynamic urging means urges the lower end of the auxiliary damper in a direction to push down the auxiliary damper. The vehicle air conditioner according to claim 2, wherein the mouth is opened. 4. The aerodynamic biasing means is a baffle plate projecting inward from a lower end of the auxiliary damper in a closed state substantially perpendicular to a flow direction of outside air. The air conditioner for vehicles according to any one of the preceding claims. 5. An upper end portion of said auxiliary damper is pivotally supported by said inside / outside air switching damper, and said aerodynamic urging means attached to a lower end portion of said auxiliary damper raises a lower end portion of said auxiliary damper. The vehicle air conditioner according to claim 2, wherein the auxiliary inlet is opened by urging in a direction. 6. The air conditioner according to claim 5, wherein the aerodynamic biasing means is a western kite attached to the auxiliary damper via a universal joint. 7. The vehicle air conditioner according to claim 5, wherein the aerodynamic biasing means is a lift generating body attached to the auxiliary damper by forming an outside air passage.