JPH03232547A - Air cleaner to be mounted in vehicle - Google Patents

Abstract

PURPOSE:To prevent the generation of a malfunction by providing a temp. sensor which detects the temp. in a vehicle near the part where a gas sensor is mounted and controlling the input of a motor according to a difference in the signals between the gas sensor and the temp. sensor. CONSTITUTION:The in-vehicle air sucked from a suction port 18 is subjected to removal of dust by a wire net 25 of an electric discharge device 19 when a motor 13 is driven. The fine dust is adsorbed by an electrostatic filter 28. The temp. of the gas sensor 2 rises as the gas sensor 2 adsorbs the gaseous components entering from a ventilation port 5. The motor 13 is controlled by a control circuit 26 according to this signal. The signal from the gas sensor 2 and the signal from the temp. sensor 8 are compared and the contamination of the air in the vehicle room is detected by making investigation that the temp. rise of the gas sensor 2 is not the temp. rise in the vehicle. Since the generation of the malfunction is obviated in this way, the state in the vehicle is maintained always clean.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an on-vehicle air cleaner mounted on the rear tray of an automobile.

2. Description of the Related Art In recent years, the number of in-vehicle air purifiers that purify cigarette smoke and odors in automobiles has increased, and it has become common for these in-vehicle air purifiers to be attached to the rear tray.

Conventionally, this type of vehicle air cleaner mounted on a rear tray has a configuration as shown in FIGS. 6 and 7.

In other words, the vehicle air purifier main body 31 has a fan 32 inside.
The motor 33 is held between the partition wall 35 and the main body 31 via a support rubber 34. The fan 32 is arranged horizontally, and the suction port 37 that opens into the thin chamber 36 that covers it faces upward, and the ventilation port 37
' is provided facing downward, and is designed to suck air from above and below.

A discharge device 3 is installed in an intake port 38 provided on the side of the main body 31.
9 is provided, and a filter 40 bent into a V-shape is provided behind the discharge device 39. Note that the discharge device 3
A wire mesh 45 is attached to the intake port side of the valve 9.

A control circuit 46 for controlling the motor 33 is provided below the filter 40, and a metallic shield plate 47 is formed above the control circuit 46 to cover the control circuit 46. is in contact with the lower side of the filter 40.

The filter 40 is formed by pasting together an electrostatic filter 48 and an activated carbon filter 49 incorporating activated carbon.

A printed circuit board 50 is provided on the side of the filter 40,
A gas sensor 51 is attached to this printed circuit board 50. Then, the control circuit 46 responds to the input from the gas sensor 51.
The input to the motor 33 is controlled by.

The mounting portion of the gas sensor 51 is isolated from the air passage within the main body by a protective wall 52, and smoke enters the gas sensor 51 through the ventilation port 53.

When the motor 33 is driven in the above configuration, the intake port 38
Relatively coarse dust is removed from the in-vehicle air that has been sucked in by the wire mesh 45 of the discharge device 39, and the fine dust is given a positive charge when passing through the discharge device 39 and is transferred to the negative polarity electrostatic filter 48 at the rear. The odor particles are adsorbed by the activated carbon filter 49 and removed.

The clean air thus purified is introduced into the dim chamber 36 and is discharged into the vehicle through the exhaust port 54.

The above operation is performed when the gas sensor 51 detects air pollution such as smoke, and automatically performs a purification action depending on the dirt condition inside the car to keep the air inside the car clean at all times.

When the gas sensor 51 adsorbs gas, its temperature rises, and the control circuit 46 controls the motor 33 in response to the signal.

Problems to be Solved by the Invention In such a conventional configuration, since the degree of temperature rise of the gas sensor 51 is detected, it is affected by temperature changes within the vehicle interior. In other words, the interior of the vehicle is not dirty (but if the temperature inside the vehicle rises, the gas sensor 51 senses this and activates the vehicle air purifier.

Furthermore, even if the air inside the vehicle is dirty, when the cold air cooled by the air conditioner reaches the gas sensor 51, the temperature of the gas sensor 51 does not rise, so air pollution cannot be detected and the air purifier is not operated. In this way, a malfunction occurs in the detection of air pollution in the vehicle interior, and the in-vehicle air purifier does not function properly.

The present invention solves these problems by providing an on-vehicle air purifier that uses a sensor to detect dirt in the air regardless of changes in the temperature inside the vehicle, and operates immediately in response to the level of dirt in the air inside the vehicle. The purpose is to

Means for Solving the Problem In order to solve this problem, the present invention installs a temperature sensor close to the mounting part of the gas sensor, detects the temperature inside the vehicle interior at the same time as the air pollution inside the vehicle interior, and detects the temperature. The motor input is controlled according to the difference.

Function: With this configuration, it is possible to provide an in-vehicle air purifier that allows the gas sensor 51 to accurately detect the degree of contamination without being affected by temperature changes in the vehicle interior, and which operates immediately in response to the degree of contamination of the air in the vehicle interior, thereby reducing waste. This means that the air inside the vehicle can be kept clean at all times without using much electricity.

EXAMPLE Hereinafter, an example of the present invention will be described with reference to the accompanying drawings.

In FIGS. 1 to 5, reference numeral 11 denotes a vehicle air purifier body, which has a built-in motor 13 that drives a fan 12.
It is held between the main body 11 and L).

The fan 12 is arranged horizontally, and a whirlpool chamber 1 covering it
The suction port 17 opened at 6 is provided upward, and the ventilation port 17' is provided downward, so that air is sucked in from above and below.

A discharge device 19 is provided in an intake port 18 provided on the side of the main body 11, and a filter 2o bent into a V-shape is provided behind the discharge device 19.

A discharge device 19 is provided in front of the filter 20,
A wire mesh 25 is attached to the inlet side of the discharge device 19.

A control circuit 26 for controlling the motor 13 is provided below the filter 20, and a metallic shield plate 27 is formed above the control circuit 26 to cover the control circuit 26. is in contact with the lower side of the filter 20. The filter 2° is formed by pasting together an electrostatic filter 28 and an activated carbon filter 29 incorporating activated carbon.

The gas sensor 2 is attached to the printed circuit board 1, and the motor 1 is controlled by the control circuit 26 in response to the input from the gas sensor 2.
Controls input 3.

The mounting portion of the gas sensor 2 forms a small chamber 4 with a protective wall 3, and is blocked from the air passage within the main body, so that smoke enters the gas sensor 2 through a ventilation port 5.

A temperature sensor 8 is installed next to the gas sensor 2 and is insulated by a shielding wall 7, and this temperature sensor 8 detects the atmospheric temperature inside the vehicle.

In the above configuration, when the motor 13 is driven, relatively coarse dust is removed from the air sucked into the vehicle through the intake port 18 by the wire mesh 25 of the discharge device 19, and fine dust is removed from the discharge device 1.
9, the odor particles are given a positive charge and are electrically adsorbed by the rear electrostatic filter 28 of negative polarity, and odor particles are adsorbed by the activated carbon filter 29 and removed. The air thus purified is introduced into the dim chamber 16 and discharged into the vehicle through the exhaust port 6.

The temperature of the gas sensor 2 increases by adsorbing gas components entering through the ventilation port 5, and the motor 13 is controlled by the control circuit 26 in response to the signal. At that time, the signal from the gas sensor 2 and the signal from the temperature sensor 8 are compared to check that the temperature rise of the gas sensor 2 is not a rise in the temperature inside the vehicle, thereby reliably detecting contamination of the air inside the vehicle.

Therefore, it is possible to provide an on-vehicle air purifier that allows the gas sensor 2 to accurately detect the degree of dirtiness without being affected by temperature changes inside the vehicle, and which operates immediately in response to the degree of dirtiness inside the vehicle.

Effects of the Invention As is clear from the description of the above embodiments, the present invention has a temperature sensor installed close to the mounting part for attaching the gas sensor of the air purifier, so that the temperature inside the car can be detected at the same time as the dirt inside the car. Since the motor input is controlled according to the difference, the gas sensor accurately detects the level of dirt without being affected by temperature changes inside the car, making it possible to provide an in-vehicle air purifier that operates immediately in response to the level of dirt inside the car. You can always keep the inside of your car clean without using unnecessary electricity.

In addition, since there is a shielding wall between the gas sensor and the temperature sensor, there is no effect such as heat generation between the two sensors, and the atmosphere in the nearby area can be detected. It can be made to work as desired, such as being able to react sensitively to air.

[Brief explanation of drawings]

Fig. 1 is a sectional view of a main part showing an embodiment of the present invention, Fig. 2 is an overall sectional view of the same, Fig. 3 is a perspective view of the same, Fig. 4 is a control circuit diagram of the same, and Fig. 5 is a diagram of the same sensor. 6 is a cross-sectional view of the conventional example, FIG. 7 is a cross-sectional view of a main part thereof, and FIG. 8 is a perspective view thereof. 1... Printed circuit board, 2... Gas sensor, 4... Small chamber, 5... Ventilation port, 7...
...shielding wall, 8. old... temperature sensor, 12...
...Fan, 13...Motor, 26...
...Control circuit.

Claims (2)

[Claims] (1) A dust collector consisting of a discharge device and a filter, a fan and a motor that drives the fan are arranged in a box-shaped main body, and the output signal of the gas sensor and sensor that detects the degree of pollution in the air inside the car is arranged. A control circuit is built in to control the input to the motor accordingly, and a temperature sensor is installed near the mounting part of the gas sensor to detect the temperature inside the vehicle,
The gas sensor is of a type that increases the temperature by adsorbing gas, and the vehicle air purifier controls the input of the motor according to the difference in signals between the gas sensor and the temperature sensor. (2) Claim 1, wherein a heat insulating wall is provided between the gas sensor and the temperature sensor to block heat generated from each sensor.
Car air purifier listed.