JPH0740224U - Automotive air conditioner - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a comfortable air-conditioning system for automobiles with less offensive noise. [Structure] A gas sensor 21 for detecting the degree of contamination of air is arranged downstream of the air cleaning filter 20.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a vehicle air conditioner.

[0002]

[Prior art]

 Conventionally, as an air conditioner for a vehicle, for example, a selection device that selectively communicates the upstream side with the vehicle interior and the vehicle exterior, while communicating the downstream side with the vehicle interior, and selects the air inside or outside the vehicle interior There is an air blower unit provided with the air blower unit, an air cleaning filter arranged on the downstream side of the air blower unit, and a gas sensor provided outside the vehicle for detecting the degree of air pollution. Then, the gas sensor detects the degree of pollution of the air outside the vehicle, and the selection device switches the flow path of the air according to the degree of pollution to establish the outside air introduction state or the inside air introduction state.

[0003]

[Problems to be solved by the device]

 However, the pollution degree of the air outside the vehicle changes frequently in response to changes in the environment, and accordingly, the selection device also frequently operates. Therefore, the switching sound of the selection device and the changing air suction sound are unpleasant and uncomfortable to use.

In view of the above problems, it is an object of the present invention to provide an automobile air conditioner that produces less harsh sound and is comfortable to use.

[0005]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the vehicle air conditioner according to the present invention selectively communicates the upstream side with the inside and the outside of the vehicle compartment, while communicating the downstream side with the inside of the vehicle and the inside or outside the vehicle. It consists of an air blower unit equipped with a selection device for selecting air, an air cleaning filter placed in the outside air inlet flow path, and a gas sensor that detects the degree of air pollution.The degree of air pollution detected by this gas sensor is a specified value. In the above case, the gas sensor is arranged downstream of the air cleaning filter in an automobile air conditioner that maintains the inside air introduction state by the selection device.

[0006]

[Action]

 Therefore, according to the present invention, the gas sensor detects the degree of pollution of the air that has passed through the air cleaning filter.

[0007]

【Example】

 Next, an embodiment of an automobile air conditioner according to the present invention will be described with reference to FIG. The air conditioner for an automobile according to this embodiment includes a blower unit 10, an air cleaning filter 20 arranged on the downstream side of the air blowing unit 10, and a gas sensor 21 arranged on the downstream side of the air cleaning filter 20. It consists of

The blower unit 10 is provided with an inside / outside air switching damper 11, which is a selection device, so as to be rotatable, and a blower 12. Then, by rotating the damper 11 to a predetermined position and rotating the blower 12 via a driving mechanism (not shown), the inside air is circulated from the suction port 13 communicating with the inside of the vehicle or the outside of the vehicle. The outside air is taken in through the suction port 14 communicating with the.

The air cleaning filter 20 is arranged near the exhaust port 15 located on the downstream side of the blower unit 10.

The gas sensor 21 detects the degree of pollution of the air that has passed through the filter 20, for example, a flammable gas of low concentration, cigarette smoke, etc., and sends a detection signal to the control means 22. More specific examples include a Figaro gas sensor (TGS 800) and the like.

Then, the detection signal from the gas sensor 21 sent to the control means 22 is compared with a reference value in the control means 22, and when the pollution degree exceeds the reference value, a drive mechanism (not shown) is used. The damper 11 is rotated to close the suction port 14 that communicates with the outside of the vehicle, and open the suction port 13 that communicates with the inside of the vehicle to bring the inside air into the inside state and maintain this state.

In the above-described embodiment, the case where the air cleaning filter 20 is provided on the downstream side of the blower unit 10 has been described, but the present invention is not limited to this, and the filter 20 may be provided in the outside air introduction flow path. For example, it may be provided outside the suction port 14 for introducing the outside air, or in the outside air introducing passage in the blower unit 10.

[0013]

[Effect of device]

 As is clear from the above description, according to the present invention, the gas sensor detects the pollution level of the air previously cleaned by the air cleaning filter even when the pollution level of the air outside the vehicle is extremely high. Therefore, the damper does not rotate unless the air pollution outside the vehicle is extremely high. For this reason, unlike the conventional example, the damper does not rotate frequently according to the change in the degree of pollution of the outside air, so that annoying noise is reduced, and a comfortable air-conditioning system for automobiles can be obtained.

[Brief description of drawings]

FIG. 1 is a schematic cross-sectional view showing an embodiment of an automobile air conditioner according to the present invention.

[Explanation of symbols]

10 ... Blower unit, 11 ... Inside / outside air switching damper, 12
... Blower, 14 ... Suction port, 20 ... Air cleaning filter, 21 ... Gas sensor.

Claims (1)

[Scope of utility model registration request] 1. A blower unit that selectively communicates the upstream side with the vehicle interior and the vehicle exterior, while communicating the downstream side with the vehicle interior, and has a selection device that selects air inside or outside the vehicle interior, It consists of an air purifying filter arranged in the outside air introduction channel and a gas sensor that detects the degree of air pollution,
In an automobile air conditioner that maintains an inside air introduction state by the selection device when the degree of air pollution detected by this gas sensor is equal to or greater than a predetermined value, the gas sensor is arranged downstream of the air cleaning filter. Air-conditioning system for automobiles.