JPH08156582A - Air conditioner control device for vehicle - Google Patents

Abstract

PURPOSE: To quickly and surely remove smells even when it is high in humidity by providing a deodorizing means which deodorizes air in a cabin through a filter and then send the air back to the cabin and executing control in such a way that the more offensive detected smells are, and the higher it is in humidity, the greater the flow rate of air sucked in by the deodorizing means will be. CONSTITUTION: When a vehicle is in operation, the existence of smells is examined based on detection signal voltage from a gas sensor 8, and when the existence of smells is made sure, it is judged based on the detected signal from a humidity sensor 9 whether or not a humidity gain is for example, 1/2, and when it is found to be 1/2, the flow rate Q1 of air sucked in corresponding to smell detection signal voltage is selected, and the revolution speed of a fan motor 5 is so controlled that the flow rate will meet the aforesaid flow rate. On the other hand, a humidity gain is found not to be 1/2, it is judged whether or not its gain is 1, and when it is found to be 1, the flow rate Q2 of air sucked in is selected, and the revolution speed of the fan motor 5 is so controlled that the flow rate will meet the aforesaid flow rate. Besides, when a humidity gain is 2, the flow rate Q3 of air sucked in (Q1 <Q2 <Q3 ) is selected.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicular air-conditioning control device, and more particularly to a vehicular air-conditioning control device capable of reliably removing odor generated in a vehicle compartment.

[0002]

2. Description of the Related Art Conventionally, an air purifier is provided in order to remove the odor of cigarettes generated in the passenger compartment, the exhaust gas entering the passenger compartment, and the odor of gasoline and the like. In this type of air purifier, the air in the vehicle compartment is sucked by a fan, passes through a filter to remove the odor, and is then returned to the vehicle compartment. In addition, this air purifier has a built-in odor detection sensor, which detects the odor of sucked air by the odor detection sensor and changes the fan speed in proportion to the strength of the detected odor. ing.

[0003]

However, even if the air purifier as described above is provided, the odor cannot be removed and remains inside the vehicle when the humidity is high such as during the rainy season. The present invention has been made in view of the above problems, and an object of the present invention is to provide an air conditioning control device for a vehicle that can remove odor even in high humidity.

[0004]

In order to achieve the above object, the present invention relates to an odor detecting means for detecting an odor in a vehicle interior, a humidity detecting means for detecting a humidity in the vehicle interior, and a suction of air in the vehicle interior. Not only the strong odor detected by the odor detecting means and the odor detecting means for removing the odor through the filter and returning it to the passenger compartment, and the higher the humidity detected by the humidity detecting, the more the odor is sucked in by the odor removing means. And a control means for largely controlling the air volume.

The odor removing means is preferably an air purifier which is installed in the rear of the vehicle compartment and sucks air in the vehicle compartment by a fan to pass a filter to remove the odor and then return the air to the vehicle compartment. In addition, instead of an air purifier, it is installed in the rear or front of the passenger compartment, and it cools and dehumidifies the air inside the passenger compartment with a fan, cools and dehumidifies it with a heat exchanger, and removes odors through a filter before returning it to the passenger compartment. It can also be a device.

[0006]

According to the above construction, the control means further increases the amount of air sucked by the odor removing means when the odor detected by the odor detecting means is strong and the humidity detected by the humidity detecting means is high. Therefore, when the humidity is high, a large amount of air in the vehicle is sucked into the odor removing means, passes through the filter, and removes the odor.

[0007]

Next, an embodiment of the present invention will be described with reference to the accompanying drawings. FIG. 1 shows a first embodiment of the present invention, in which an air purifier 1 is used as a deodorizing means. The air purifier 1 has a fan 6 driven by a fan motor 5 and a filter 7 containing activated carbon contained in a casing 4 having an inlet 2 and an outlet 3. The air purifier 1 is installed inside a rear parcel panel behind a rear seat of an automobile, and has an intake port 2 and an outlet port 3.
Is opened on the rear parcel panel toward the passenger compartment.

The gas sensor 8 is the odor detecting means in the present invention, and utilizes the phenomenon that electric conductivity increases when a low concentration of flammable gas or cigarette smoke is adsorbed on the semiconductor composed of SnO ₂ particles. A detection signal voltage corresponding to the gas concentration is output. The gas sensor 8 can be installed not only in the air flow path inside the air purifier 1 but also in an appropriate place in the vehicle compartment.

The humidity sensor 9 is the humidity detecting means in the present invention, and is adapted to detect the humidity in the vehicle compartment. Like the gas sensor 8, the humidity sensor 9 can be provided inside the air purifier 1 or at an appropriate place in the vehicle interior.

The controller 10 controls the rotation of the fan motor 5 of the air purifier 1 based on the gas sensor 8 and the humidity sensor 9. The control device 10 has a built-in memory, and the memory shown in FIG.
As shown in, the humidity is in a low range of 50% or less (hereinafter, referred to as humidity gain 1/2), a middle range of 50 to 80% (hereinafter, referred to as humidity gain 1), and high in 80% or more. Data indicating the relationship between the odor detection signal voltage and the intake air volume is stored for each of the three levels of humidity gain in the range (hereinafter referred to as humidity gain 2).

The control operation of the fan motor 5 by the control device 10 will be described below with reference to the flow chart shown in FIG. First, in step 101, the presence or absence of odor is detected based on the detection signal voltage V from the gas sensor 8, and if there is no odor, the odor removal is stopped in step 102.
If there is an odor, it is determined in step 103 based on the detection signal from the humidity sensor 9 whether or not the humidity gain is 1/2, and if it is 1/2, in step 104 the gain 1 / shown in FIG. According to the relationship of 2, the suction air volume Q ₁ corresponding to the odor detection signal voltage V is selected, and the rotation speed of the fan motor 5 is controlled so as to be the air volume.

In step 103, the humidity gain is 1 /
If it is not 2, it is determined in step 105 based on the detection signal from the humidity sensor 9 whether or not the humidity gain is 1, and if it is 1, the gain 1 shown in FIG.
The suction air volume Q ₂ corresponding to the odor detection signal voltage V is selected in accordance with the above relationship, and the rotation speed of the fan motor 5 is controlled so as to attain the air volume.

If the humidity gain is not 1 in step 105, the gain is 2. Therefore, in step 107, the odor detection signal voltage V is obtained according to the relationship of gain 2 shown in FIG.
The intake air volume Q ₃ corresponding to the above is selected, and the rotation speed of the fan motor 5 is controlled so that the air volume becomes the same.

FIG. 4 shows a second embodiment of the present invention, in which a cooler device 11 is used as a deodorizing means. The cooler device 11 is a conventionally known air conditioner provided in front of the passenger compartment, and uses the fan 14 to suck the air sucked from the outside air suction port 13a or the inside air suction port 13b selected by operating the suction port door 12. It is sent to the evaporator 16 through the filter 15, the air cooled here is diverted by operating the mix damper 17, and a part or all of it is passed through the heater core 18,
After mixing cold air and warm air to adjust the temperature, the vent door 19
a, temperature-controlled air is blown out from any one of the ventilation outlet 20a, the floor outlet 20b, or the defroster outlet 20c selected by operating the heat door 19b or the differential door 19c. Has become.

The cooler device 11 is provided with a control device 10 for performing a general air conditioning control operation and an odor removing operation according to the present invention as in the first embodiment. That is, the rotation of the fan motor 14a that drives the fan 14 is controlled based on the gas sensor 8 and the humidity sensor 9 arranged in the same manner as in the first embodiment. However, if the odor removal operation is performed while the control device 10 is performing the air conditioning control for maintaining the temperature of the vehicle interior at the set temperature, the temperature of the air blown out from the outlets 20a, 20b, 20c due to a change in the air volume. Change and the air-conditioning state is disturbed, so that it becomes necessary to correct the setting of the blowout temperature by changing the opening degree of the mix damper 17 according to the change of the air volume accompanying the odor removal operation. Therefore, as the air volume increases, the set temperature is lowered during heating and the set temperature is raised during cooling.

FIG. 5 shows a third embodiment of the present invention in which a rear cooler device 21 is used as a deodorizing means. The rear cooler device 21 is installed inside the rear parcel panel P at the rear of the vehicle compartment, and has a suction port 2
Casing 2 forming an air passage from 2 to outlet 23
4, a filter 25, an evaporator 26, and a fan 27 driven by a fan motor 27a are provided. In this device, the air sucked from the suction port 22 by the rotation of the fan 27 is cleaned by the filter 25, cooled by the evaporator 26, and blown into the vehicle interior from the blowout port 23.

The rear cooler device 21 is also provided with the gas sensor 8, the humidity sensor 9 and the control device 10, and performs the general air conditioning control operation and the odor removing operation according to the present invention as in the first embodiment. .

[0018]

As is clear from the above description, according to the present invention, as the odor is stronger and the humidity is higher, the amount of air sucked in by the odor removing means is controlled to be larger, so that the odor is high. Even if the smell inside the car is removed quickly and reliably, it is comfortable.

[Brief description of drawings]

FIG. 1 is a block diagram of a first embodiment of an air conditioning control device according to the present invention.

FIG. 2 is a diagram showing the relationship between the odor detection signal voltage and the amount of sucked air with respect to the level of humidity gain.

FIG. 3 is a flowchart showing the operation of the control device.

FIG. 4 is a block diagram of a second embodiment of the air conditioning control device according to the present invention.

FIG. 5 is a block diagram of a third embodiment of the air conditioning control device according to the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Air purifier (odor removing means), 5 ... Fan motor, 6 ... Fan, 7 ... Filter, 8 ... Gas sensor (odor detecting means), 9 ... Humidity sensor (humidity detecting means), 10
... Control device (control means), 11 ... Cooler device (scent removal means), 14 ... Fan, 14a ... Fan motor, 1
5 ... Filter, 21 ... Rear cooler device (smell removing means), 25 ... Filter, 27 ... Fan, 27a ... Fan motor.

Claims (1)

[Claims] 1. An odor detecting means for detecting an odor in a passenger compartment, a humidity detecting means for detecting a humidity in the passenger compartment, and an odor for sucking in air in the passenger compartment, filtering it to remove an odor, and then returning it to the passenger compartment. The odor removing means is provided with not only a strong odor detected by the odor detecting means, but also a control means for controlling the intake air volume by the odor removing means to be larger as the humidity detected by the humidity detection is higher. A vehicle air-conditioning controller.