JP2006347492A - Air-conditioning control device for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air-conditioning control device for vehicle for controlling the switching of air intake ports according to the degree of pollution of air outside a vehicle, capable of adequately controlling the switching of the air intake ports even when the sensitivity of a pollution sensor is changed attributable to the humidity of air outside the vehicle. <P>SOLUTION: The air-conditioning control device comprises a gas sensor 2 for detecting the degree of pollution of air outside a vehicle, a humidity sensor 3 for detecting the humidity of air outside the vehicle, and a control device body 1 having a storage unit 1A to store the correction coefficient for correcting the detected value of the gas sensor 2 based on the detected value of the humidity sensor 3. The control device body 1 takes in the detected value of the gas sensor 2 and the detected value of the humidity sensor 3, corrects the detected value of the gas sensor 2 according to the correction coefficient corresponding to the detected value of the humidity sensor 3 immediately after an ignition switch 4 is turned on, and controls the switching of the air intake ports 10E, 10F of an air-conditioner of an automobile based on the detected value of the corrected gas sensor 2. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a vehicle air conditioning control device.

  In general, a vehicle air-conditioning control device is known in which the degree of air pollution outside the vehicle is detected by a gas sensor, and the air intake is selected based on the detection value of the gas sensor. In such a vehicle air-conditioning control device, when the degree of air pollution outside the vehicle is high due to traffic jams or the like, the air intake port is set so as to take in only the air inside the vehicle, and the so-called inside air circulation mode is set. When the air in the vehicle is fresh, the air intake is set to take in the air outside the vehicle and the so-called outside air introduction mode is set.For example, the air intake is switched according to the degree of air pollution outside the vehicle. (Patent Document 1).

  In such an air conditioning control device for a vehicle, a semiconductor sensor using a metal oxide such as tin oxide is often used as a gas sensor for detecting the degree of air pollution outside the vehicle. This sensor detects the degree of air pollution outside the vehicle using a phenomenon in which a chemical reaction occurs in a metal oxide due to adsorbed carbon monoxide, nitrogen oxide, or the like, and the resistance value of the sensor changes.

By the way, in order to promote the chemical reaction of metal oxide, the sensor is generally heated and used. However, when the humidity is high, the humidity in the air is heated and the sensor is exposed to water vapor. A phenomenon occurs in which the chemical reaction of the metal oxide becomes dull. Therefore, when the humidity is high, the gas sensor may not output an appropriate detection value, and the air intake switching control may not be appropriately performed. In order to solve this problem, there has been proposed a vehicle air-conditioning control device that detects the operating state of a wiper and corrects the sensitivity of a gas sensor in rainy weather with high humidity (Patent Document 2).
JP 59-23722 JP 07-69041 A

  However, in such a vehicle air-conditioning control device, the sensitivity of the gas sensor is corrected based on the operating state of the wiper. Therefore, when the humidity is high, such as when the humidity is fine or cloudy, the wiper does not operate. There is a problem that the sensitivity correction of the gas sensor is not performed and the air intake switching control is not appropriately performed. In addition, even when it is raining, for example, a wiper is generally not operated in a place with a roof such as an underground parking lot. Therefore, even in such a situation, the air intake switching control may not be appropriately performed. There is a problem.

  An object of the present invention is to provide a vehicle air-conditioning control device that performs switching control of an air intake according to the degree of air pollution outside the vehicle, even when the sensitivity of the pollution degree sensor changes due to the humidity of air outside the vehicle. An object of the present invention is to provide a vehicle air-conditioning control device in which air intake switching control is appropriately performed.

  In order to solve the above-mentioned problem, the invention according to claim 1 is a pollution degree detection sensor that detects a pollution degree of air outside a vehicle of a vehicle, a humidity sensor that detects humidity of air inside the vehicle of the vehicle, and A control device main body having a storage unit that stores a correction coefficient for correcting the detection value of the contamination degree detection sensor based on the detection value of the humidity sensor, and the control device main body includes: The detection value and the detection value of the humidity sensor are taken in, the detection value of the contamination degree detection sensor is corrected by the correction coefficient corresponding to the detection value of the humidity sensor immediately after the ignition switch is turned on, and the correction is performed. On the basis of the detection value of the contamination degree detection sensor, the air intake switching control of the automobile air conditioner is controlled.

  According to a second aspect of the present invention, the air intake port includes an outside air intake port for taking in air outside the vehicle and an inside air intake port for taking in air in the vehicle, and the control device main body is configured to perform the correction. The air intake switching control is performed so that at least one of the outside air intake and the inside air intake is selected based on the detection value of the degree detection sensor.

  According to the above configuration, the humidity of the air in the vehicle immediately after the ignition switch is turned on is regarded as equivalent to the humidity of the air outside the vehicle, and the sensitivity correction of the pollution degree sensor is performed based on this humidity. Even when the sensitivity of the degree sensor changes, the air intake switching control is appropriately performed.

  According to the present invention, in a vehicle air-conditioning control device that performs switching control of an air intake according to the degree of air pollution outside the vehicle, even when the sensitivity of the pollution degree sensor changes due to the humidity of air outside the vehicle. It is possible to realize a vehicle air conditioning control device in which air intake switching control is appropriately performed.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 is a schematic diagram of a configuration of a vehicle air-conditioning control apparatus according to the present embodiment.

  The air conditioner main body 50 includes, in order from the upstream side, a blower unit 10 that takes air into the air conditioner main body 50, a cooling unit 20 that includes an evaporator 20A that cools the air taken in using the heat of vaporization of the refrigerant, an engine The heater unit 30 includes a heater core 30A that warms the air taken in using cooling water (not shown).

  The blower unit 10 and the cooling unit 20 are connected by a duct 40A, and the cooling unit 20 and the heater unit 30 are connected by a duct 40B. The downstream side of the duct 40B communicates with an air outlet (not shown) provided in the vehicle, and air whose temperature and air volume are controlled is supplied into the vehicle through the air outlet.

  The blower unit 10 includes an outside air intake 10E that is an intake of outside air (hereinafter referred to as outside air), an inside air intake 10F that is an intake of inside air (hereinafter referred to as inside air), and an outside air intake 10E. An intake door 10A that switches the inside air intake port 10F, an intake door actuator 10B that drives the intake door 10A, a blower fan 10C that takes in air and sends it to the downstream side, and a blower motor 10D that drives the blower fan 10C are provided.

  When the air intake is switched and controlled according to the degree of contamination of the outside air, the intake door actuator 10B is shown in FIG. 1 by the control device body 1 (see FIG. 2) according to the degree of contamination of the outside air detected by the gas sensor 2 (described later). Driven in the direction of arrow A, intake door 10A is set to an appropriate position.

  On the other hand, when the air intake is manually adjusted by the air conditioning operation unit 60 (described later), the intake door actuator 10B is moved by the control device body 1 in the direction of arrow A in FIG. 1 according to the air intake selected by the air conditioning operation unit 60. The intake door 10A is set to an appropriate position.

  Here, when the air intake door 10A is at the position P1 in FIG. 1, the outside air intake port 10E is shielded, and the outside air is not introduced and the inside air circulation mode is set. On the other hand, when the air intake door 10A is at the position P2 in FIG. 1, the inside air intake mode is set such that the inside air intake port 10F is shielded and the inside air is not introduced but only the outside air is introduced. When the air intake door 10A is at a position between P1 and P2 in FIG. 1, the inside air and the outside air are mixed and supplied into the vehicle according to the position of the air intake door 10A.

  Thus, the air taken in by the blower unit 10 passes through the cooling unit 20 and is cooled.

  The air cooled by the cooling unit 20 is further adjusted in temperature by the heater unit 30 according to the position of the air mix door 30B, and then supplied into the vehicle through the air outlet. That is, when the air mix door 30B is at the position P3 in FIG. 1, the air cooled by the cooling unit 20 is supplied directly into the vehicle without passing through the heater unit 30. On the other hand, when the air mix door 30B is at the position P4 in FIG. 1, the air cooled by the cooling unit 20 is appropriately heated by the heater unit and supplied into the vehicle. When the air mix door 30B is in a position between P3 and P4 in FIG. 1, the air cooled by the cooling unit 20 and the air appropriately heated by the heater unit are mixed according to the position of the air mix door 30B, Supplied in the car.

  FIG. 2 shows an electrical block diagram of the present embodiment.

  The control device body 1 is electrically connected to the air conditioning operation unit 60, the inside air temperature sensor 70, and the outside air temperature sensor 80, and the temperature, air volume, air intake mode, etc. set in the air conditioning operation unit 60, and the inside air temperature sensor The air conditioner main body 50 is controlled based on the inside air temperature detected by the air temperature sensor 70 and the outside air temperature detected by the outside air temperature sensor 80 to perform air conditioning control. Here, the air-conditioning operation unit 60 is provided near the center of the instrument panel 90 as shown in FIG. The room temperature sensor 70 is provided near the air conditioning operation unit 60. The outside air temperature sensor 80 is provided near the front grille (not shown).

  The control device body 1 is electrically connected to the gas sensor 2, the humidity sensor 3, the ignition switch 4, the intake door actuator 10B, the air mix door actuator 30C, and the blower motor 10D.

  The gas sensor 2 is a semiconductor sensor having a characteristic that the resistance value changes when the degree of contamination of the outside air such as carbon monoxide or nitrogen oxide in the atmosphere is detected, and is between the intake door 10A and the blower fan 10C. Provided (see FIG. 1). This gas sensor 2 corresponds to the contamination degree detection sensor in the claims.

  On the other hand, the humidity sensor 3 is a sensor that measures the relative humidity of air from the change in the dielectric constant accompanying the absorption and release of moisture in the polymer film, and is provided near the center of the instrument panel 90 (see FIG. 3).

  The ignition switch 4 is a switch for turning on / off the power supply of the vehicle electrical equipment including the air conditioning control device, and is provided near the handle 95 in the vehicle (see FIG. 3).

  The intake door actuator 10B is driven by the control device body 1 to change the position of the intake door 10A.

  The air mix door actuator 30C is driven by the control device main body 1 to change the position of the air mix door 30B.

  The blower motor 10D is driven by the control device body 1 to rotate the blower fan 10C.

  The control device main body 1 includes a storage unit 1A, and stores a correction coefficient of the detection value of the gas sensor 2 that performs correction based on the detection value of the humidity sensor 3 for each predetermined humidity resolution. Here, as shown in FIG. 4, the humidity resolution is ds%, and the correction coefficient when the humidity is h% is k (h) in the humidity range of s% to s + n × ds (described as nds in FIG. 4)%. Is stored. Here, n is a positive integer. For example, the correction coefficient when the humidity h is h = s + 3ds% is k (s + 3ds), and the correction coefficient when the humidity h is h = s + (n−2) ds% is k (s + (n−2) ds). It is.

  The correction coefficient k (h) can be set in advance as follows. That is, first, the gas sensor 2 is installed in an experimental container capable of adjusting humidity so that the output value of the gas sensor 2 can be detected. Next, gas contained in the running air, such as carbon monoxide and nitrogen oxides, is mixed in the test container at a predetermined concentration, and the humidity is changed for each predetermined resolution within a predetermined range. Measure the output value of 2. In the above-described example, the humidity is increased every ds% from s% to s + n × ds%, and the output value of the gas sensor 2 is measured each time. The correction coefficient k (h) can be set by calculating so that the measured output value at each humidity is equal to the output value at the humidity at which the gas sensor 2 does not change in sensitivity.

  Next, details of the operation of this embodiment will be described with reference to the flowchart shown in FIG.

  In step S101, it is determined whether the ignition switch 4 (described as an IGN switch in FIG. 5) is on or off. If the ignition switch 4 is on, the flow moves to step S102. On the other hand, if the ignition switch 4 is off, the flow returns to step S101.

  In step S102, the gas sensor 2 detects the degree F of outside air contamination. Here, the contamination degree F is calculated by F = RS / R0, where R0 is the reference output resistance value of the gas sensor 2 in clean air and RS is the detection value of the gas sensor 2 exposed to the outside air. After this, the flow moves to step S103.

  In step S103, the humidity sensor 3 detects the humidity h of the air in the vehicle. After this, the flow moves to step S104.

  In step S104, the value of the index L used in the subsequent flow branch is set to L = 1. After this, the flow moves to step S105.

  In step S105, the value of L is determined. If the value of L is 1, the flow moves to step S106. On the other hand, if the value of L is not 1, the flow moves to step S108.

  In step S106, the correction coefficient k of the detection value of the gas sensor 2 is set to the correction coefficient k (h) corresponding to the humidity h stored in the storage unit 1A in advance. After this, the flow moves to step S107.

  In step S107, the value of the index L is set to L = L + 1. After this, the flow moves to step S109.

  In step S108, the correction coefficient k of the detection value of the gas sensor 2 is left as it is. After this, the flow moves to step S109.

  In step S109, the correction value of the degree F of outside air detected by the gas sensor 2 is calculated as F = k × F. After this, the flow moves to step S110.

  In step S110, opening / closing control of the intake door 10A is performed according to the calculated degree F of outside air contamination. For example, when F is less than the first predetermined value, the intake door 10A is driven to the position P2 in FIG. 1 to enter the outside air introduction mode, and F is greater than or equal to the first predetermined value and less than the second predetermined value. Drives the intake door 10A to a position between P1 and P2 in FIG. 1 according to the value of F. If the value of F is equal to or greater than a third predetermined value, the intake door 10A is moved to the position of P1 in FIG. To the inside air circulation mode. After this, the flow returns to step S101.

  By the above operation, the humidity of the air in the vehicle immediately after the ignition switch 4 is turned on is regarded as the humidity of the outside air, and the contamination degree F calculated from the detection value of the gas sensor 2 based on the humidity of the air in the vehicle is corrected. Even when the humidity of the air outside the vehicle is high, the air intake switching control can be appropriately performed.

  Also, once the flow has reached step S110, the value of L is no longer 1, so the value of correction coefficient k is the value of k (h) set in the previous flow thereafter. That is, immediately after the ignition is turned on, the value of k (h) set in the first flow is used in the subsequent opening / closing control of the intake door 10A. Therefore, when the air conditioner body 50 is operated to control the humidity in the vehicle and the humidity in the vehicle has changed from the humidity of the outside air, the pollution degree F is corrected based on the controlled humidity in the vehicle. There is no.

  Further, when correcting the pollution degree F based on the humidity, the humidity sensor for detecting the humidity of the air in the vehicle, which is normally provided in the air conditioning control device, is used. Does not cause up.

  As mentioned above, although the Example of this invention was explained in full detail with drawing, an Example is only an illustration of this invention and this invention is not limited only to the structure of an Example. Accordingly, it is a matter of course that the present invention includes any design change within a range not departing from the gist of the present invention.

  For example, the gas sensor 2 is not limited to the operation principle shown in the embodiment, and may be any sensor that can detect the degree of air contamination.

  Moreover, the attachment position of the gas sensor 2 and the humidity sensor 3 is not limited to the position shown in the Example.

  Further, the value of the correction coefficient k (h) is not limited to that shown in FIG. 4, and the humidity resolution ds% and the humidity range s% to s + n × ds% are arbitrarily set as necessary. The correction coefficient k (h) corresponding to each can be appropriately set and used. Also, instead of setting the correction coefficient k (h) for each predetermined humidity, for example, one correction coefficient k (h) is set for each predetermined humidity range for s% to s + 5 × ds%. Also good.

It is a schematic diagram of the structure of the Example of this invention. It is a block diagram of the Example of this invention. It is a figure which shows the attachment position of the component of the Example of this invention. It is a figure which shows the correction coefficient of the pollution degree F of the external air of the Example of this invention. It is a flowchart of the Example of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Control apparatus body 2 Gas sensor 3 Humidity sensor 4 Ignition switch 10 Blower unit 10A Intake door 10B Intake door actuator 10C Blower fan 10D Blower motor 10E Outside air intake 10F Inside air intake 20 Cooling unit 20A Evaporator 30 Heater unit 30A Heater core 40A, 40B Duct 50 Air-conditioner main body 60 Air-conditioning operation unit 70 Inside air temperature sensor 80 Outside air temperature sensor 90 Instrument panel 95 Handle

Claims (2)

A pollution degree detection sensor for detecting the degree of pollution of air outside the automobile;
A humidity sensor for detecting the humidity of the air inside the automobile;
A control device main body having a storage unit storing a correction coefficient for correcting the detection value of the contamination degree detection sensor based on the detection value of the humidity sensor;
The control device main body takes in the detection value of the contamination degree detection sensor and the detection value of the humidity sensor, and the contamination degree detection sensor by the correction coefficient corresponding to the detection value of the humidity sensor immediately after the ignition switch of the automobile is turned on The vehicle air-conditioning control apparatus is characterized in that, based on the detection value of the contamination degree detection sensor that has performed the correction, switching control of the air intake port of the air-conditioning apparatus of the automobile is performed. . The air intake port includes an outside air intake port for taking in air outside the vehicle and an inside air intake port for taking in air in the vehicle, and the control device main body is based on the detection value of the contamination degree detection sensor that has performed the correction. 2. The vehicle air conditioning control device according to claim 1, wherein switching control of the air intake is performed so that at least one of an outside air intake and the inside air intake is selected.

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