JPH08169232A - Air conditioner for vehicle with air purifying function - Google Patents

Abstract

PURPOSE: To prevent the reduction in the air quantity at the time of quick cooling or at the time of quick heating by arranging both an air changeover door and a second indoor-air intake port between an intake door and an air- purifying unit, so that the air inside the cabin can be taken into the case without passing through the air purifying unit. CONSTITUTION: When the presence of an intake door 3 in the position A is detected by a position detecting part 12, and the drawing-out of an ash tray is detected by a detecting part 15, and the fouling of the indoor air is transmitted, and also when the air quantity detecting part 15 of a blower 5 transmits the normal air quantity, an air changeover door 9 is changed over to the position C by an air changeover door control part 13. In other words, the passage on the side of an air purifying unit 8 is opened, and the air inside the cabin is passed through the air purifying unit 8 and is purified. At that time, when the air quantity detecting part 15 transmits a large quantity of air, the air changeover door 9 is changed over to the position D for shutting off the passage on the side of the air purifying unit 8, and the air inside the cabin is taken inside a case 4 through a second indoor-air intake port 10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner having an air cleaning function for vehicles.

[0002]

2. Description of the Related Art As an air conditioner having an air cleaning function for a conventional vehicle, there is, for example, one shown in FIG.

In the figure, reference numeral 4 is a case, a blower 5 and an evaporator 6 are arranged in the case 4, and an intake door 3 is arranged on the upstream side of the blower 5.

There are two flow paths on the upstream side of the intake door 3.
One is connected to the outdoor air intake 1, the other is connected to the indoor air intake 2 through the air cleaning unit 8,
The flow path is selected according to the position of the intake door 3.

The downstream side of the evaporator 6 communicates with a heater unit, a ventilator, a defroster, etc., which are not shown.

When the intake door 3 is in the position B in the figure, the outdoor air is taken into the case 4 from the outdoor air intake 1, and when the intake door 3 is in the position A in the figure, the indoor air is taken into the room. The air is taken into the case 4 from the air intake 2 through the air cleaning unit 8.

[0007]

However, in such a conventional one, when the intake door 3 is at the position A and the inside air is taken in from the indoor air intake 2 into the case 4, the total amount of the air flow rate is increased. Will pass through the air cleaning unit 8.

Therefore, especially during rapid cooling or rapid heating, it is necessary to operate the motor of the blower 5 at a high speed to flow a large amount of air, so that the load of the motor of the blower 5 is increased due to the ventilation resistance of the air cleaning unit 8. Therefore, it is necessary to increase the capacity of the blower 5 motor.

Further, there is a problem that noise is increased due to an increase in ventilation resistance of the air cleaning unit 8 and an increase in motor capacity of the blower 5.

Therefore, according to the present invention, even during rapid cooling or rapid heating, there is no reduction in the air flow rate, and therefore there is no need to particularly increase the capacity of the motor of the blower 5 and no noise is generated. It is to provide an air conditioner with an air purifying function for use.

[0011]

In order to solve the above problems, the present invention is directed to a conventional intake door 3 for switching between indoor air and outdoor air shown in FIG. 2, a blower 5, an evaporator 6,
In an air conditioner with an air cleaning function for a vehicle, in which a heater unit is installed and an air cleaning unit 8 is installed in the indoor air intake 2 part, an intake door 3 and an air cleaning unit 8 are provided.
It is characterized in that an air switching door and a second indoor air intake are provided between them.

Further, an intake door position detecting section for detecting a dirty state of indoor air such as smoking in the room and cleaning the indoor air through the air cleaning unit only when the indoor air is dirty, an air switching door control It is characterized by a combination of a room, an indoor air pollution transmitter, and an air flow transmitter.

[0013]

[Action]

According to this structure, when the intake door position detection unit detects that the intake door has the flow path on the inside air side in the open position, and the indoor air pollution transmission unit transmits that the indoor air is dirty. In the case of the blower, when the air volume transmitter of the blower transmits a normal air volume, the air switching door control unit is activated to move the air switching door to the open position on the flow path of the air cleaning unit side to open the air cleaning unit side. Open the passage to clean the room air through the air cleaning unit.

However, even if the intake door position detection unit detects that the intake door is in the open position of the flow path on the inside air side, and the indoor air pollution transmitting unit detects that the indoor air is dirty, the blower blower is detected. When the air volume transmission unit of the unit transmits a large air volume, the air switching door control unit determines that it is during rapid cooling or rapid heating and controls the air switching door to a position for directly taking in the inside air to control the air cleaning unit. The indoor air is taken into the case without blocking the passage and opening the second indoor air intake port and passing the air cleaning unit.

When the intake door is located on the inside air intake side and the ashtray is open / closed, the air switching door control unit controls the position where the air switching door directly takes in indoor air regardless of whether the blower air volume is large or small. It is fixed to.

Further, when the intake door is located on the outside air intake side, the air switching door control unit controls the air switching door to directly take in the indoor air or the air regardless of the size of the indoor air pollution and the air volume of the blower. It is fixed at one of the positions where the flow path on the cleaning unit side is released.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG.

The structure will be described below. However, the same parts as those of the structure of this embodiment and the structure of the conventional example are designated by the reference numerals used in the conventional example, and the description of the same parts will be omitted.

Reference numeral 9 is an air switching door, which is arranged between the intake door 3 and the air cleaning unit 8 of the conventional example.

Further, the upstream side of the air switching door 9 is branched into two flow paths, one of which is connected to the second indoor air intake port 10, and the other flow path is the same as in the conventional example.
Through the first indoor air intake 11 to select the first indoor air intake 11 and the second indoor air intake 10.

The position detector 1 of the intake door 3
2 and an ashtray open / close detection unit 14 as an indoor dirt transmission unit and an air switching door control unit 13 for controlling the position of the air switching door 9 by inputting respective detection results of the air volume detection unit 15 as an air volume transmission unit of the blower 5. Has been done.

The air cleaning unit 8 may be a filter paper filter, a charging filter having a charging effect, or an electric dust collecting filter for charging dust by corona discharge to collect the dust.

Further, it is possible to provide a deodorizing function by arranging a deodorizing agent by a physical adsorption method and a deodorizing agent by a chemical adsorption method.

The details of the control of the air switching door controller 13 of this embodiment are shown in Table 1 below.

[0026]

[Table 1]

The operation of this embodiment will be described below with reference to Table 1.

First, when the intake door position detection unit 12 detects that the intake door 3 is in the A position, and the ashtray open / close detection unit 14 pulls out the ashtray, it is reported that the indoor air is dirty. When the air volume detection unit 15 of No. 5 transmits a normal air volume, the air switching door control unit 13 operates to open the air switching door 9 by C
By controlling the position, the passage on the side of the air cleaning unit 8 is opened and the air in the room is cleaned through the air cleaning unit 8.

Next, when the intake door position detection unit 12 detects that the intake door 3 is in the A position, and the ashtray open / close detection unit 14 sends out that the indoor air is dirty by pulling out the ashtray. However, when the air volume detection unit 15 of the blower 5 transmits a large air volume, the air switching door control unit 13 determines that it is during rapid cooling or heating and controls the air switching door 9 to the D position to clean the air. The indoor air is taken into the case 4 without blocking the passage on the unit 8 side and opening the second indoor air intake port 10 and passing the air cleaning unit 8. At this time, the flow volume does not decrease and the noise of the flow path system is small.

When the intake door 3 is in the A position and the ashtray is closed, the second indoor air is controlled by controlling the air switching door 9 to the D position regardless of the air volume of the blower 5. Air is taken in through the intake 10. In this case, the life of the cleaning unit 8 is extended without the room air passing through the air cleaning unit 8 unnecessarily.

When the intake door 3 is in the B position, it is not necessary to particularly explain that the position of the air switching door 9 may be either the C position or the D position regardless of whether the ashtray is opened or closed and the air volume is large or small.

In the above embodiment, the ashtray open / close detection unit 14
May be a room air pollution detection unit that directly detects dirt in the room air, or the air flow rate detection unit may be a blower motor rotation speed detection unit that detects the rotation speed of the motor of the blower 5 instead of directly detecting the air flow rate. Good.

[0033]

As described above, according to the present invention, when the air is taken in from the indoor air intake port, the intake air is taken in only when the air volume is not large during rapid cooling or rapid heating. Since the indoor air is not passed through the air cleaning unit 8 at the time of rapid cooling or rapid heating, it is not necessary to increase the capacity of the motor of the blower 5 and the air volume is not reduced. There is an effect that the noise of the flow path system can be reduced.

Further, in the present invention, when a filter paper filter, a charging filter, an electrostatic precipitator filter or a cyclone type filter is provided on the upstream side of the outdoor air intake 1, the intake air is cleaned.

Furthermore, a deodorizing effect can be provided by adding a deodorizing agent by a physical adsorption method or a chemical adsorption method to these air purification filters.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing an embodiment of the present invention.

FIG. 2 is an explanatory diagram showing a conventional example.

[Explanation of symbols]

 1 ... Outdoor air intake 2 ... Indoor air intake 3 ... Intake door 4 ... Case 5 ... Blower 6 ... Evaporator 8 ... Air cleaning unit 9 ... Air switching door 10 ... Second indoor air intake 11 ... First room Intake port 12 ... Intake door position detector 13 ... Air switching door controller 14 ... Ashtray open / close detector 15 ... Air volume detector

Claims (2)

[Claims] 1. An intake door, a blower, an evaporator, and a heater unit are sequentially arranged from upstream to downstream along an air flow path in a case, and an air cleaning unit is provided in an indoor air intake flow path selected by the intake door. And an air conditioner provided with a first indoor air intake, wherein an air switching door and a second indoor air intake are provided between the intake door and the air cleaning unit. Air conditioner with air purifying function. 2. An intake door position detection unit, an air switching door control unit, an indoor air pollution transmission unit, and an air volume transmission unit are provided, and the intake door is input to the indoor air intake position by using the intake door position and the air volume as inputs. The air switching door control unit for controlling the position of the air switching door to the side of the second indoor air intake when the air volume becomes large is provided. Air conditioner with air cleaning function for vehicles.