JPH08132851A - Air conditioning device for vehicle and method therefor - Google Patents

Abstract

PURPOSE: To provide an air conditioning device for vehicle which can purify air while ensuring a necessary air flow quantity, and the method thereof. CONSTITUTION: In an air conditioning device for vehicle in which a filter 4 purifying passing air is provided in an air passage 11 between an intake door 3 and a fan 5, a ventilation changeover means 21 which takes the air in a car room or the air outside the car room in the air passage 11 without passing through the filter 4 is provided in the air passage 11 between the filter 4 and the fan 5. When the fan 5 is operated at the maximum air flow quantity, in addition to taking air in through the filter 4, a fixed quantity of air without passing through the filter 4 is partially taken in, and hence influence of the ventilation resistance of the filter 4 is lightened so as to ensure a necessary air flow quantity.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle air-conditioning system and a vehicle air-conditioning method, and more particularly to a vehicle air-conditioning system having a filter provided on the upstream side of a fan.

[0002]

2. Description of the Related Art Conventionally, a vehicle air conditioner has been devised so that it can be operated more comfortably in accordance with various vehicle operating modes. For example, as shown in FIG. 5, a filter 4 for cleaning passing air is used. There is one that has.

This vehicle air conditioner 110 has an inside air introduction port 1 for taking in vehicle interior air, an outside air introduction port 2 for taking in vehicle outside air, and these inside air introduction port 1 and the outside air introduction port 2 described above.
And an intake door 3 for selectively opening and closing. A fan 5 for sending the air taken in from the inside air inlet 1 or the outside air inlet 2 toward the downstream side of the air passage 11 is arranged on the downstream side of the intake door 3 and includes the filter 4
Is an air passage 11 between the intake door 3 and the fan 5.
It is provided in.

Further, the vehicle air conditioner 110 includes a fan 5
Has an evaporator 6 connected to the air passage 11 on the downstream side thereof to absorb heat from passing air, and a heater core 8 connected to the air passage 11 on the downstream side of the evaporator 6 to warm the air in the air passage 11. There is a mix door 9 for adjusting the temperature by allowing a part of the cooled air to pass through the heater core 8 to be warmed and the rest to be mixed.

In such a device 110, as the rotation speed of the fan 5 increases, the air volume of the air taken in from the inside air introduction port 1 or the outside air introduction port 2 increases, and the inside air introduction port 1 is opened by the intake door 3. Alternatively, either the outside air inlet 2 is opened to take in the air inside or outside the vehicle.

The air taken in passes through the bell mouth 7 after passing through the bell mouth portion 7 after the fine dust is removed by the filter 4, and the heat of the air is absorbed by the evaporator 6 during cooling, etc. During heating, it is heated by the heater core 8. Here, for example, at the time of maximum cooling, the mix door 9 is moved to the position indicated by the chain double-dashed line in FIG. 5 so that air does not pass through the heater core 8. On the other hand, at the time of maximum heating, the mix door 9 is set.
5 to the position indicated by the solid line in FIG.
Is set to allow air to pass through. In this way,
The cleaned and temperature-controlled air is blown into the vehicle compartment through a blow-out port (not shown).

[0007]

By the way, in the above-mentioned conventional vehicle air conditioner 110, all the air taken in is passed through the filter 4 provided in the air passage 11 upstream of the fan 5, whereby the air is cleaned. It was intended to be realized.

However, in such a vehicle air conditioner 110, even when it is necessary to blow out a large amount of air from the air outlet at the time of maximum cooling or maximum heating, for example, in the upstream of the fan 5. Since the air is taken in through the filter 4 provided in the air passage 11 at all times, the influence of the ventilation resistance of the filter 4 becomes remarkable as the air flow rate increases, and therefore the fan 5
There is a problem that even if the voltage applied to the motor for rotating the motor is increased, the required air volume cannot be obtained, and the effects of rapid cooling or rapid heating cannot be sufficiently obtained.

Therefore, an object of the present invention is to provide a vehicle air conditioner and a vehicle air conditioning method capable of cleaning the air while ensuring a required air volume.

[0010]

SUMMARY OF THE INVENTION To achieve the above object, the present invention provides an inside air inlet for taking in vehicle interior air, an outside air inlet for taking in vehicle exterior air, the inside air inlet and the outside air inlet. An intake door that selectively opens and closes, a fan that is provided on the downstream side of the intake door and that sends the air taken in from the inside air introduction port or the outside air introduction port toward the downstream side of the air passage, and the intake door. In a vehicle air conditioner provided with an air passage between the fan and a filter for cleaning air passing therethrough, the vehicle interior air or the vehicle exterior air is taken into the air passage without passing through the filter, Alternatively, the vehicle air conditioner is characterized in that ventilation switching means for blocking the inflow of air is provided in the air passage between the filter and the fan.

Further, the ventilation switching means is provided for the air inside the vehicle,
Inside air vents that communicate with outside air and air passages,
A cylindrical air introduction chamber in which an outside air port and an air passage port are formed, and provided inside the cylindrical air introduction chamber,
A switching valve that is rotatably supported around a cylindrical shaft that connects the inside air port or the outside air port with the air passage port, or blocks the inside air port and the outside air port from the air passage port. Can be configured to have.

In the vehicle air conditioning method using such a vehicle air conditioner, when the fan has the maximum air volume, the vehicle inside air introduction port is opened when the vehicle interior air is introduced, and the vehicle does not pass through the filter. When a predetermined amount of indoor air is taken in by the ventilation switching means and the outside air of the vehicle compartment is introduced, the outside air introduction port is opened, and the outside air which does not pass through the filter is taken in by the ventilation switching means by a predetermined amount, and the fan is operated at maximum. When the air volume is not, the inflow of air that does not pass through the filter is blocked by the ventilation switching means.

Further, in the above method, when the fan does not have the maximum air volume, when only the air in the vehicle compartment is introduced, the inside air introduction port is opened, and the inflow of air that does not pass through the filter is blocked by the ventilation switching means. When only the air outside the vehicle compartment is introduced, the outside air introduction port is opened, and the inflow of air that does not pass through the filter is blocked by the ventilation switching means, and the outside air of the vehicle compartment is introduced at a predetermined ratio smaller than the air inside the vehicle compartment. When the inside air introduction port is opened and the outside air that does not pass through the filter is taken in by a predetermined amount by the ventilation switching means, the outside air introduction port is introduced when the inside air is introduced at a predetermined ratio smaller than the outside air It is possible to employ a method in which the outside air that does not pass through the filter is taken in by a predetermined amount by the ventilation switching means.

Further, in the vehicle air conditioning method using the vehicle air conditioner, when the filter is clogged by a predetermined amount or more, the vehicle interior air that does not pass through the filter or the vehicle exterior air is switched to the ventilation. It is characterized by being taken in by means.

[0015]

In the present invention thus constructed, when the vehicle air conditioner is operated, it is first determined whether or not the fan has the maximum air volume. Here, when the fan has the maximum air volume, the inside air introduction port is opened when introducing the vehicle interior air, and a predetermined amount is taken in by the ventilation switching means that does not pass through the filter, and when the vehicle exterior air is introduced. A predetermined amount is taken in by the ventilation switching means, which opens the outside air introduction port and does not pass through the filter. Thereby, for example, during maximum cooling or maximum heating, when it is necessary to blow out a large amount of air from the outlet, other than taking in air by passing through a filter provided in the air passage upstream of the fan, A predetermined amount of air that does not pass through the filter is taken in. Therefore, the effect of the ventilation resistance of the filter is mitigated to obtain the required air volume, and most of the air passes through the filter to be cleaned and blown into the vehicle interior. On the other hand, when the fan does not have the maximum air volume, the inflow of air that does not pass through the filter is blocked by the air flow switching means. In this way, when the influence of the ventilation resistance of the filter is not so great, the air that has been cleaned by passing through the filter is taken in.

When the fan does not have the maximum air volume, the inside air introduction port, the outside air introduction port, and the ventilation switching means cooperate with each other without blocking the inflow of air that does not pass through the filter as described above. The outdoor air may be mixed with a predetermined ratio and introduced.

Further, when the filter is clogged with a predetermined amount or more, a predetermined amount of air is taken in by the ventilation switching means without passing through the filter. As a result, for example, even when the filter is frozen, a predetermined minimum air volume is secured.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic configuration diagram of a vehicle air conditioner according to an embodiment of the present invention, FIG. 2 is an enlarged view of a sub door 21 as a ventilation switching unit shown in FIG. 1, and FIG. FIG. 6B is a diagram showing a state in which the vehicle is open, FIG. 7B is a diagram showing a state in which the air outside the vehicle compartment is introduced, and FIG.

As shown in FIG. 1, the vehicle air conditioner 10 of the present embodiment includes an intake unit 41 for selectively taking in vehicle interior air or vehicle exterior air, and a cooler unit 42 for cooling the taken air. And a heater unit 43 that heats air and blows it to a predetermined position in the vehicle interior,
These are connected to each other.

The intake unit 41 is formed with an inside air inlet 1 for taking in the air inside the vehicle and an outside air inlet 2 for taking in the air outside the vehicle, and an intake door 3 for selectively opening and closing these inlets 1, 2. Is openable and closable. Further, a fan 5 for sending the taken-in air to the cooler unit 42 is provided.

In the intake unit 41 of this embodiment,
The filter 4 is arranged in the air passage 11 between the intake door 3 and the fan 5. By passing the air through the filter 4, dust and odors in the air taken into the intake unit 41 are removed.

In particular, in the air passage 11 between the filter 4 and the fan 5, the sub door 2 as a ventilation switching means.
1 is provided. This sub door 21 is, as shown,
Inside air port 22, outside air port 23, and air passage port 24, which communicate with vehicle interior air, vehicle exterior air, and air passage 11, respectively.
Has a cylindrical air introduction chamber 25 in which
A bypass passage 28 that connects the outside air inlet 23 of the air introduction chamber 25 and the outside air inlet 2 is provided. Also,
Inside the cylindrical air introduction chamber 24, a switching valve 26 rotatably supported around a cylindrical shaft 27 is provided.

As shown in the enlarged view of FIG. 2, the switching valve 26 has a fan-shaped main body portion 26d having a cross section close to a semi-cylindrical shape, and seal portions 26a to 26c formed so as to project from the arc side surfaces.
Have and. When the switching valve 26 is rotated to the position shown in FIG.
And 26c close the outside air port 23, and the seal portions 26a and 26c allow the inside air port 22 and the air passage 11 to communicate with each other, so that the air in the vehicle interior can be taken into the air passage 11 without passing through the filter 4. it can. Further, when the switching valve 26 is rotated to the position shown in FIG. 2B (hereinafter referred to as the B position), the seal portions 26a and 26 are
The inside air port 22 is closed by b, and the seal portion 26
The outside air port 23 and the air passage 11 communicate with each other by a and 26c, and the air outside the vehicle compartment can be taken into the air passage 11 without passing through the filter 4. On the other hand, FIG.
When the switching valve 26 is rotated to the position shown in (C) (hereinafter referred to as the C position), the seal portions 26a to 26c close all of the inside air port 22, the outside air port 23, and the air passage 11, and the filter 4 is closed. It is possible to block the inflow of air that does not pass through.

By adopting the rotary sub door 21 as described above, the size is made compact. The air taken in by the sub door 21 and the air taken in by the inside air introducing port 1 or the outside air introducing port 2 pass through the bell mouth portion 7 (see FIG. 1) and are sent to the cooler unit 42 by the fan 5. .

The cooler unit 42 contains an evaporator 6 in which a refrigerant circulates, and heats the refrigerant and air to cool the air. The evaporator 6 includes a compressor, a condenser,
A cooling cycle is constituted with an expansion valve and the like.

A heater core 8 for heating air is provided in the heater unit 43 so as to have a passage 50. The engine cooling water circulates in the heater core 8,
A mix door 9 is provided on the front surface of the heater core 8 so as to be openable and closable. When this mix door 9 is rotated to the full hot position shown by the solid line in the figure, maximum heating operation is performed,
When it is rotated to the full cool position shown by the dotted line, the maximum cooling operation is performed. Further, when the mix door 9 is rotated to the intermediate position, the air from the cooler unit 42 passes through the heater core 8 and the passage 50 at a ratio according to the rotated position, is mixed, and is adjusted to a predetermined temperature. It

A mix chamber 55 for mixing warm air and cold air is formed downstream of the heater core 8, and the mix chamber 5 is formed.
A defrost port, a vent port, and a foot port, which are not shown, are provided in order to take out the air inside 5. Also,
A defrost door, a vent door, and a foot door (which are collectively referred to as “mode door”) (not shown) for opening and closing each of these openings are provided so as to be openable and closable. The air conditioning mode of the vehicle air conditioner 10 includes a vent mode in which air is blown from the vent port toward the upper body of the occupant, a foot mode in which air is blown from the foot port toward the feet, and an air is blown from the defrost port to remove fog in the wind. There are various modes such as a differential mode that blows out the air, and these air conditioning modes are realized by switching the position of the mode door.

FIG. 3 is a vehicle air conditioner 1 shown in FIG.
It is a schematic block diagram of 0. The vehicle air conditioner 10 is a so-called automatic air conditioner, and has an auto amplifier 32 for controlling the driving of various doors attached to the air conditioner.

The vehicle air conditioner 10 detects changes in the vehicle interior temperature due to changes in the outside air temperature, the amount of solar radiation, or changes in the occupant with various sensors during automatic control, and maintains the vehicle interior at the target temperature. , The temperature of blown air, the amount of blown air, the air inlet, and the outlet are automatically changed. The auto amplifier 32 includes a motor 33 for rotating the fan 5.
A fan control circuit 39 for adjusting the voltage applied to the
A sub door actuator 34 for driving the sub door 21,
An intake door actuator 35 that drives the intake door 3, a mix door actuator 36 that drives the mix door 9, and a mode door actuator 37 that drives the mode door 40 are connected. Further, the auto amplifier 32 includes a sensor group 41 for detecting the temperature outside the vehicle,
A / C switch 4 for operating the automatic air conditioner
2, temperature setting switch 4 to set the target temperature in the passenger compartment
3, a fan switch 44 for manually selecting the fan air volume in, for example, four stages, and a diff switch 4 for selecting a diff mode
5, a REC switch 46 for selecting the inside air circulation mode, an FRE switch 47 for selecting the outside air introduction mode, a clogging detection means 48 for detecting clogging of the filter 4 due to dust and the like are connected. And the auto amplifier 65
Controls the actuators 34 to 37 and the fan control circuit 39 by arithmetically processing signals from the sensor group, the temperature setting switch, and other switches by a built-in microcomputer.

Particularly in this embodiment, the auto amplifier 32 is
When the fan 5 has the maximum air volume, the inside air introduction port 1 is opened when introducing the cabin air, the sub door 21 is rotated to the position A, and the outside air introduction port 2 is opened when the cabin outside air is introduced. The sub door 21 is opened and rotated to the B position.
Here, the case where the fan 5 has the maximum air volume refers to the case where the voltage applied to the motor 33 that rotationally drives the fan 5 is equal to or higher than a predetermined voltage P (V) in the present embodiment, but is not limited thereto. It is also possible to substitute other physical quantity instead of the physical quantity.

As a result, for example, when it is necessary to blow out a large amount of air from the air outlet at the time of maximum cooling or maximum heating, the air passage 1 upstream of the fan 5 is provided.
The air can be taken in without partially passing through the filter 4 in addition to taking in the air through the filter 4 provided in 1. Therefore, it is possible to obtain the required air volume by alleviating the effect of the ventilation resistance of the filter 4 (a phenomenon in which the increase in the air volume reaches a peak).

On the other hand, when the fan 5 does not have the maximum air volume, in this embodiment, the auto amplifier 32 includes the sensor group 41.
Based on the temperature of the blown air determined by the above, etc., the inside air introduction mode (100% introduction of air inside the vehicle), 20% outside air introduction mode (80% introduction of air inside the vehicle and 20% outside air), 20% introduction mode of inside air (outside the vehicle interior) 80% air and 20% air inside the vehicle) or outside air introduction mode (air outside the vehicle 10
0% introduction) is selected. That is, after rotating the intake door 3 to a predetermined position, the sub door 21 is rotated to the C position in the inside air introduction mode and the outside air introduction mode, and the sub door 21 is moved to the B position in the outside air 20% introduction mode. When the inside air 20% introduction mode is turned to the position, the sub-door 21 is turned to the position A to enable the above selection.

Further, when the clogging detection means 48 detects that the filter 4 provided in the intake unit 41 is clogged by a predetermined amount or more, the auto amplifier 32 is set to the air introduction mode at that time. On the basis of,
The sub door 21 is controlled to be rotated to the A position or the B position, and is displayed on a display unit (not shown) to notify the occupant. As a result, the minimum air volume can always be ensured. Although the clogging of the filter 4 is detected by the amount of change in the current consumption value of the motor 33 that drives the fan 5 to rotate, the method is not limited to this.
For example, light is applied to the filter 4 and the amount of transmission is detected by a light receiving element, the difference between the pressure at the front of the filter and the atmospheric pressure is checked, and it is checked whether the pressure difference before and after the filter exceeds a predetermined value. You may judge it.

Even when the introduction of the inside / outside air is manually selected by the REC switch 46 and the FRE switch 47,
The auto amplifier 32 controls the sub-door 21 based on the voltage applied to the motor 33, the air introduction mode, and the detection value of the clogging detection means 48, as in the above. further,
Even when the air volume is manually set by the fan switch 44, the sub door 21 is controlled in the same manner.

Next, the operation of this embodiment will be described. FIG.
4 is a flowchart of an air introduction operation of the vehicle air conditioner 10 of the present embodiment.

First, when the A / C switch 42 (see FIG. 3) is turned on and the vehicle air conditioner 10 which is an automatic air conditioner is operated, whether or not the fan 5 has the maximum air volume, that is, the fan 5 is turned on. It is determined whether the voltage applied to the rotationally driven motor 33 is equal to or higher than a predetermined voltage P (V) (step S1).

When the fan 5 has the maximum air volume, the process proceeds to step S2, and the auto amplifier 32 determines whether the current air introduction mode is the inside air introduction mode. Then, in the inside air introduction mode, the inside air introduction port 1 is opened (step S3), and the sub door 21 is rotated to the position A (step S4). In the outside air introduction mode, the outside air introduction port 2 is opened. Open (step S5), and sub door 2
1 is rotated to the B position (step S6).

As a result, when it is necessary to blow out a large amount of air from the outlet, for example, during maximum cooling or heating, or when the diff mode is selected by the diff switch 45, the air upstream of the fan 5 can be used. In addition to passing air through the filter 4 provided in the passage 11, a predetermined amount of air can be taken in without passing through the filter 4. Therefore, it is possible to reduce the influence of the ventilation resistance of the filter 4 and obtain a required air volume, and most of the air passes through the filter 4 to be cleaned and blown into the vehicle interior.

On the other hand, when the fan 5 does not have the maximum air volume, the auto amplifier 32 determines which mode the current air introduction mode is set to (step S7,
S12, S16, S21). If the inside air introduction mode is selected in step S7, the inside air introduction port 1 is opened (step S7).
8) If the filter 4 is not clogged by a predetermined amount or more (step S9), the sub door 21 is rotated to the C position (step S10). Thus, when the influence of the ventilation resistance of the filter 4 is not so great, the air that has been passed through the filter 4 and purified is taken in.

However, when the filter 4 is clogged by a predetermined amount or more (step S9), the sub door 21
Is rotated to the A position (step S11), and a predetermined amount of air is taken in without passing through the filter 4. Thereby, for example, even when the filter 4 is frozen or when the filter 4 is used without being replaced and the filter 4 is clogged, it is possible to always ensure a predetermined minimum air volume. At this time,
A display (not shown) indicates that the filter is clogged to notify the occupant (the same applies hereafter).

In the step S12, if the outside air 20% introduction mode is selected, the inside air introduction port 1 is opened (step S1).
3) If the filter 4 is not clogged by a predetermined amount or more (step S14), the sub door 21 is rotated to the B position (step S15). With this configuration, it is not necessary to control the intake door actuator 35 so as to hold the intake door 3 at the midway position as in the conventional case, and a mode in which vehicle interior air and vehicle exterior air are simply introduced at a predetermined ratio Can be set. However, when the filter 4 is clogged by a predetermined amount or more (step S14), the sub door 21 is rotated to the position A (step S11), and the air in the vehicle interior does not pass through the filter 4 by a predetermined amount. It is taken in and the minimum air volume is secured.

When the fan 5 is not at the maximum air volume and is in the outside air introduction mode or the inside air 20% introduction mode, the same operation is performed according to the inside air introduction mode or the outside air 20% introduction mode. That is, when the outside air introduction mode is set in step S16, the outside air introduction port 2 is opened (step S17), and the filter 4 is not clogged by a predetermined amount or more (step S1).
8), rotate the sub door 21 to the C position (step S
19). However, when the filter 4 is clogged by a predetermined amount or more (step S18), the sub door 21 is rotated to the B position (step S20), and a predetermined amount of air is taken in without passing through the filter 4. In the case where the inside air 20% introduction mode is set in step S21, the outside air introduction port 2 is opened (step S22), and if the filter 4 is not clogged by a predetermined amount or more (step S23), the sub-door 21 is opened. It is rotated to the position (step S24). However,
When the filter 4 is clogged by a predetermined amount or more (step S23), the sub door 21 is rotated to the B position (step S20).

When the differential mode switch is pressed, the outside air is introduced and the sub doors can be uniformly operated in the B position. As a result, the outside air is always secured at the time of diff, and it is possible to surely remove the defrost.

It should be noted that the embodiments described above are described for facilitating the understanding of the present invention, and not for limiting the present invention. Therefore, each element disclosed in the above embodiments is intended to include all design changes and equivalents within the technical scope of the present invention. For example, the sub door 21 is not limited to the above configuration, but can be variously modified. For example, the positions and sizes of the inside air outlet 22, the outside air outlet 23, and the air passage 11 can be determined according to the specifications, whereby the ratio of air that does not pass through the filter 4 to the total air taken in (in this embodiment, about 20%). It is also possible to set appropriately. Further, the ventilation switching is not limited to the rotary type as long as the ventilation switching can be performed, and the ventilation switching may be performed by, for example, reciprocating movement of a piston having an air passage.

[0045]

As described above, according to the present invention, the filter provided in the air passage between the intake door and the fan and the ventilation switching means provided in the air passage between the filter and the fan are provided. Therefore, when the fan has the maximum air volume, for example, during maximum cooling or heating, or when the differential mode is selected, when it is necessary to blow out a large amount of air from the air outlet, the air passage upstream of the fan In addition to taking in air through the provided filter, it is possible to take in a predetermined amount of air without passing through some filters. Therefore, it becomes possible to reduce the influence of the ventilation resistance of the filter and obtain the required air volume. Moreover, most of the air can be passed through the filter 4 to be cleaned and blown into the vehicle interior. on the other hand,
When the fan does not have the maximum air volume, the effect of the ventilation resistance of the filter is not so large, so that all the taken-in air can be passed through the filter to be cleaned.

When the fan does not have the maximum air volume, instead of passing all the taken air through the filter,
By using the ventilation switching means, it is possible to set a mode in which the air inside the vehicle and the air outside the vehicle are introduced at a predetermined ratio. In this case, it can be achieved by a simple method, and it is not necessary to perform complicated control such as holding the intake door at the midway position as in the conventional case.

Further, since the ventilation switching means is a rotary type having a cylindrical air introduction chamber and a switching valve rotatably supported around a cylindrical shaft, it has an extremely compact structure. It becomes possible to do.

Further, even when the filter is frozen or when the filter is used without being replaced and the filter is still clogged, a predetermined minimum air volume can always be secured by using the ventilation switching means.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a vehicle air conditioner according to an embodiment of the present invention.

2A and 2B are enlarged views of a sub-door as the ventilation switching unit shown in FIG. 1, in which FIG. 2A is a diagram showing a state where air is introduced into the passenger compartment, and FIG. , (C) are diagrams showing a closed state.

3 is a schematic block diagram of the vehicle air conditioner shown in FIG. 1. FIG.

FIG. 4 is a flowchart of an air introduction operation of the vehicle air conditioner of this embodiment.

FIG. 5 is a schematic configuration diagram of a conventional vehicle air conditioner.

[Explanation of symbols]

1 ... Inside air inlet, 2 ... Outside air inlet, 3 ... Intake door, 4 ... Filter, 5 ... Fan,
11 ... Air passage, 21 ... Sub door,
22 ... Inside air port, 23 ... Outside air port, 24 ... Air passage port, 25 ... Air introduction chamber, 26 ... Switching valve.

Claims (5)

[Claims] 1. An inside air introduction port (1) for taking in air in a vehicle compartment
An outside air inlet (2) for taking in the air outside the vehicle compartment; an intake door (3) for selectively opening and closing the inside air inlet (1) and the outside air inlet (2); and this intake door (3) A fan (5) provided downstream of the inside air inlet (1) or the outside air inlet (2) for sending air toward the downstream side of the air passage (11), and the intake door (3) ) And the fan (5) in the air passageway (11), which has a filter (4) for cleaning the air passing therethrough, without passing through the filter (4). The ventilation switching means (21) for taking in the vehicle interior air or the vehicle exterior air into the air passageway (11) or blocking the inflow of air is provided with the filter.
A vehicle air conditioner provided in an air passageway (11) between (4) and the fan (5). 2. The ventilation switching means (21) is provided in the vehicle interior air,
A cylindrical air introduction chamber (25) formed with an inside air port (22), an outside air port (23) and an air passage port (24) which communicate with the outside air and the air passageway (11), respectively, and this cylindrical shape Provided inside the air introduction chamber (25), the inside air port (22) or the outside air port (23) and the air passage port (2
4) A switching valve that is rotatably supported around a cylindrical shaft (27) that communicates with the inside air port (22) or the outside air port (23) and the air passage port (24). The vehicle air conditioner according to claim 1, further comprising (26). 3. An inside air introduction port (1) for taking in the air inside the vehicle
And an outside air inlet (2) for taking in the air outside the vehicle compartment, an intake door (3) for selectively opening and closing the inside air inlet (1) and the outside air inlet (2), and this intake door (3) A fan (5) which is provided on the downstream side of the air intake port (1) or the outside air introduction port (2) for sending air toward the downstream side of the air passage (11), and the intake door (3 ) And the fan (5) in the air passage (11), and a vehicle air conditioner having a filter (4) for cleaning the passing air. (4) and the fan (5) are provided with a ventilation switching means (21) that takes in the air inside the vehicle or the air outside the vehicle into the air passage (11) without passing through the air passage) or shuts off the inflow of air. It is installed in the air passageway (11) between and, and when the fan (5) has the maximum air volume, the air inside the vehicle is introduced. When the inside air introduction port (1) is opened and the air inside the vehicle that does not pass through the filter (4) is passed through the ventilation switching means (2
When a predetermined amount is taken in by 1) and the air outside the vehicle is introduced, the outside air inlet (2) is opened, and the outside air that does not pass through the filter (4) is taken in by a predetermined amount by the ventilation switching means (21), When the fan (5) is not at the maximum air volume, the inflow of air that does not pass through the filter (4) is changed to the ventilation switching means (21).
A vehicle air-conditioning method characterized in that it is shut off by 4. The inside air inlet for taking in the air inside the vehicle (1)
And an outside air inlet (2) for taking in the air outside the vehicle compartment, an intake door (3) for selectively opening and closing the inside air inlet (1) and the outside air inlet (2), and this intake door (3) A fan (5) which is provided on the downstream side of the air inlet (1) or the outside air introduction port (2) for sending air toward the downstream side of the air passage (11), and the intake door (3). ) And the fan (5) in the air passage (11), and a vehicle air conditioner having a filter (4) for cleaning the passing air. (4) and the fan (5) are provided with a ventilation switching means (21) that takes in the air inside the vehicle or the air outside the vehicle into the air passage (11) without passing through the air passage) or shuts off the inflow of air. It is installed in the air passageway (11) between and, and when the fan (5) has the maximum air volume, the air inside the vehicle is introduced. When the inside air introduction port (1) is opened and the air inside the vehicle that does not pass through the filter (4) is passed through the ventilation switching means (2
When a predetermined amount is taken in by 1) and the air outside the vehicle is introduced, the outside air inlet (2) is opened, and the outside air that does not pass through the filter (4) is taken in by a predetermined amount by the ventilation switching means (21), When the fan (5) does not have the maximum air volume, when only the air inside the vehicle is introduced, the inside air introduction port (1) is opened, and the inflow of air that does not pass through the filter (4) is changed to the ventilation switching means (21). ), And when only the air outside the vehicle compartment is introduced, the outside air inlet (2) is opened, and the inflow of air that does not pass through the filter (4) is blocked by the ventilation switching means (21). When the air is introduced at a predetermined ratio smaller than the air inside the vehicle, the inside air inlet (1) is opened, and the outside air that does not pass through the filter (4) is taken in by a predetermined amount by the ventilation switching means (21), A predetermined ratio of air inside the vehicle less than air outside the vehicle The air-conditioning method for a vehicle, characterized in that the outside air introduction port (2) is opened and only the outside air that does not pass through the filter (4) is taken in by the ventilation switching means (21) by a predetermined amount when the air is introduced. 5. An inside air introduction port (1) for taking in vehicle interior air
And an outside air inlet (2) for taking in the air outside the vehicle compartment, an intake door (3) for selectively opening and closing the inside air inlet (1) and the outside air inlet (2), and this intake door (3) A fan (5) which is provided on the downstream side of the air intake port (1) or the outside air introduction port (2) for sending air toward the downstream side of the air passage (11), and the intake door (3 ) And the fan (5) in the air passage (11), and a vehicle air conditioner having a filter (4) for cleaning the passing air. (4) and the fan (5) are provided with a ventilation switching means (21) that takes in the air inside the vehicle or the air outside the vehicle into the air passage (11) without passing through the air passage) or shuts off the inflow of air. It is provided in the air passageway (11) between and, when the filter (4) is clogged more than a predetermined amount, An air conditioning method for a vehicle, characterized in that air inside the vehicle or air outside the vehicle that does not pass through the filter (4) is taken in by the ventilation switching means (21).