JPH0538927A - Air conditioner for vehicle - Google Patents

Abstract

PURPOSE:To make comfortable temperature fluctuation control according to the temperature and heat environment of a crew by temperature fluctuation operating an air conditioner main body in a temperature variation width corresponding to an equivalently set temperature. CONSTITUTION:An air conditioner main body 3, temperature conditioning air in a casing 1, is temperature fluctuation controlled with a control apparatus 6 in a vehicle air conditioner A. Here, a temperature variation width, predetermined in relation to the degree of a set temperature set by a driver M, is corrected by his sense of heat measured with an infrared ray sensor 4. The air conditioner main body 3 is temperature fluctuation operated in a temperature variation width corresponding to an equivalently set temperature with a set temperature as a standard, changing cabin temperature. This allows comfortable temperature fluctuation control according to the temperature and heat environment of a crew.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle air conditioner for controlling temperature fluctuations.

[0002]

2. Description of the Related Art In Japanese Patent Laid-Open No. 1-212615, when the temperature inside a vehicle is within a set range, the temperature of blown air at a face outlet is varied in a preset pattern.
A technique for preventing a feeling of stagnation due to a feeling of comfort is described.

[0003]

However, in the above technique, when the occupant has a heat history due to the environment and exercise before riding, the above pattern does not match, and conversely gives an unpleasant feeling. is there. An object of the present invention is to provide a vehicle air conditioner capable of performing comfortable temperature fluctuation control according to the thermal environment of an occupant.

[0004]

[Means for Solving the Problems] In order to solve the above problems,
The present invention relates to a casing having a blowout port into a vehicle compartment, a blower for generating an airflow toward the blowout port in the casing, an air conditioner main body for controlling the temperature of air in the casing, and a vehicle compartment temperature setting. Means, a room temperature sensor for detecting a passenger compartment temperature, a temperature sensation grasping means for recognizing a passenger's temperature sensation, and a temperature change width determined in advance in relation to whether the set temperature is high or low. Equivalent set temperature calculation means for correcting the set temperature according to the temperature fluctuation control means for operating the air conditioner body so that the passenger compartment temperature fluctuates, and the temperature sensation grasped by the temperature sensation grasping means. And the temperature fluctuation control means employs a structure in which the temperature fluctuation operation of the air conditioner main body is performed within a temperature change width corresponding to the equivalent set temperature.

[0005]

The function of the blower is to generate an airflow toward the outlet in the casing. The room temperature sensor detects the passenger compartment temperature.
The temperature sensation grasping means grasps the occupant's temperature sensation. The equivalent set temperature calculation means, according to the temperature sensation grasped by the temperature sensation grasping means,
Calculate the equivalent set temperature. The temperature fluctuation control means operates the air conditioner main body so that the detected vehicle room temperature fluctuates within the temperature change width corresponding to the equivalent set temperature with reference to the set temperature.

[0006]

EFFECTS OF THE INVENTION A predetermined temperature change width related to the level of the set temperature is corrected by a sense of warmth, and the air conditioner main body is subjected to temperature fluctuation operation within the temperature change width corresponding to the equivalent set temperature. Therefore, comfortable temperature fluctuation control is performed according to the thermal environment of the occupant.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 1, a vehicle air conditioner A includes an air conditioning casing 1 arranged in a front part of an automobile 100, a blower 2 for generating an airflow in the casing 1, and an air conditioner for controlling the temperature of air in the casing 1. Body 3 and infrared sensor 4
A vehicle room temperature sensor 5 for detecting a vehicle compartment temperature, a control device 6 for controlling temperature fluctuation of the air conditioner body 3, and a temperature setting lever 7.

The air conditioning casing 1 has an outside air introduction port 11 and an inside air introduction port 12 in the front, and a differential air outlet 13, a face air outlet 14, a foot air outlet 15 and the like, which communicate with the inside of the vehicle compartment 120, in the rear. Have. In addition, 13
Reference numeral 1 is a differential blowing damper. The blower 2 is arranged in the front part of the air conditioning casing 1 and has blown out ports 13 at the rear,
An airflow directed to 14, 15 is generated in the air conditioning casing 1. The air conditioner body 3 includes an evaporator 31, a heater core 32, an air mix damper 33, an outlet switching damper 34, and the like, and controls the temperature of the taken-in air. The infrared sensor 4 measures the skin temperature on the face of the driver M, and a skin temperature signal 4 corresponding to the measured skin temperature.
It is a sensor that sends out 1 and is arranged at a predetermined position on the instrument panel. The warmth S'of the driver M is corrected according to the skin temperature-warmth correction straight line shown in FIG. In this embodiment, it is assumed that the driver M was in a hot place, immediately after exercising or working, or in a hot place before getting on, and has a positive warmth S. The vehicle room temperature sensor 5 is arranged substantially above the driver M and sends out a vehicle room temperature signal 51 corresponding to the detected vehicle room temperature.

The control device 6 includes an A / D converter 61 for A / D converting the skin temperature signal 41, the passenger compartment temperature signal 51, etc., an operation switch 62 for selecting normal temperature control, temperature fluctuation control, etc.
A blower motor drive circuit 63 that drives the blower 2, an air mix damper drive circuit 64 that drives the air mix damper motor 641, a mode switching damper drive circuit 65 that drives the mode switching damper 651, and a microcomputer 66. The analog signals of the solar radiation sensor 611, the blow-out temperature sensor 612, and the air volume sensor 613 are also input to the AD converter 61.

The microcomputer 66 controls the skin temperature T
Temperature sensation grasping means 66 for obtaining the thermal sensation S ′ of the driver M from s
1. Equivalent set temperature calculation means 662 for correcting the position P1 corresponding to the temperature change width ΔT corresponding to the set temperature Ta with the sense of temperature S ′.
Further, a temperature fluctuation control means 663 is provided for operating the air mix damper drive circuit 64 to perform temperature fluctuation within the corrected temperature change width ΔT ′ of the position P2.

The temperature setting lever 7 is a knob for setting the set temperature Ta, and a variable resistor is attached to the temperature setting lever 7. The temperature setting signal sent from the variable resistor is input to the microcomputer 66.

Next, the operation of the vehicle air conditioner A under the control of the microcomputer 66 will be described with reference to the flowchart of FIG. In step 701, the microcomputer 66 (not shown below) operates the operation switch 62.
It is determined whether is on the normal temperature control side. If Yes, it is determined to be on the temperature fluctuation control side, and step 702
Proceed to. In the case of No, the normal temperature control is the solar radiation sensor 611,
The approximate position of the air mix damper 33 and the air volume of the blower 2 are determined based on the amount of solar radiation, the air outlet temperature, and the air volume detected by the air temperature sensor 612 and the air volume sensor 613, and the detected vehicle room temperature is set to the set temperature Ta. The position of the air mix damper 33 (Hot side-Cool side) is finely adjusted so that In step 702, it is determined whether the operation switch 62 is on the temperature fluctuation control side.
In the case of Yes, it progresses to step 703, and in the case of No, it returns to step 701 and continues normal temperature control. Step 7
At 03, the digital value (vehicle interior temperature) obtained by A / D converting the vehicle interior temperature signal 51 is read, and the routine proceeds to step 704. This reading is repeated N times at a fixed sampling period, and N pieces of room temperature data are stored in the memory. In step 704, it is determined whether the temperature is normal (detection vehicle room temperature ≈ set temperature). If the difference between the maximum value and the minimum value of the room temperature data is within a predetermined range (for example, ± 0.5 ° C.), it is determined to be steady and the process proceeds to step 705. If it exceeds the predetermined range, the process returns to step 703 to read again (substantially, normal temperature control is continued during this loop). In step 705, the digital value (detected skin temperature) obtained by A / D converting the skin temperature signal 41 is read, and the flow advances to step 706. In step 706, the skin temperature Ts is converted into the warm sensation S ′ by the conversion line m of the skin temperature → warm sensation S conversion graph shown in FIG.
To step 707. In step 707, the equivalent set temperature Ta ′ corresponding to the warm sensation S ′ is obtained from the conversion line n of the warm sensation S ′ → equivalent set temperature conversion graph shown in FIG.
Go to step 708. In step 708, the set temperature T
The position P1 corresponding to the temperature change width ΔT corresponding to a is changed to the corrected position P2 corresponding to the equivalent set temperature Ta ′, and the temperature change width ΔT ′ is obtained (see FIG. 5). The comfortable range in FIG. 5 that does not cause habituation is experimentally obtained. In step 709, the air mix damper drive circuit 64 is controlled so that the detected room temperature fluctuates within the temperature change width ΔT ′ based on the set temperature Ta. At the same time, the air outlet switching damper 34 closes the foot air outlet 15 and controls the mode switching damper drive circuit 65 so that the air volume from the face air outlet 14 increases. During the temperature fluctuation control, the solar radiation sensor 611 and the blow-out temperature sensor 61.
2 and the detection data of the air volume sensor 613 is not used, and the air volume of the blower 2 is set to a predetermined value (constant). Step 71
At 0, it is determined whether the operation switch 62 is on the normal temperature adjustment side. In the case of Yes, the temperature fluctuation control ends. In No, it returns to step 709 and continues temperature fluctuation control.

Next, the effect of the vehicle air conditioner A will be described. (A) The position P1 corresponding to the temperature change width ΔT corresponding to the set temperature Ta is corrected by the temperature sensation S ′, and the detected room temperature changes in the temperature change width ΔT ′ at the corrected position P2. The damper 33 is controlled. Therefore, the temperature fluctuation control according to the warmth S'of the driver M is performed, and the driver M
Can be comfortable. (B) Foot outlet 1 with the outlet switching damper 34
Since the temperature fluctuation control is performed by closing 5 and increasing the air volume from the face outlet 14, the temperature fluctuation effect of preventing the feeling of stagnation due to comfortable habituation is further enhanced. (C) The temperature fluctuation control is possible only when the detection vehicle room temperature ≈ the set temperature. Therefore, the reference does not deviate, and reliable temperature fluctuation control can be performed.

The present invention includes the following embodiments in addition to the above embodiments. a. When a significantly large or small temperature sensation S'is detected, the temperature fluctuation control may be stopped and only the cold air or only the hot air may be blown out. b. The temperature sensation S ′ may be grasped by using a temperature sensation sensor that detects the blood flow rate, the amount of perspiration, etc. Alternatively, the temperature sensation S ′ may be manually selected by a panel key or the like or performed by voice. You can figure it out. c. The detection of the skin temperature, the blood flow rate, the sweat rate, and the like may be performed by a method (which can be wireless) in which the sensor is directly brought into contact with the body of the occupant to detect the temperature and transmitted to the control device 6. d. The temperature fluctuation control may be performed according to the warmth of the occupants other than the driver. e. Within the corrected temperature variation width ΔT ′ of the position P2, the variation pattern of the temperature fluctuation control is free, and the variation width may be arbitrary.

[Brief description of drawings]

FIG. 1 is a principle explanatory view of a vehicle air conditioner according to the present invention.

FIG. 2 is a flowchart of a microcomputer of the air conditioner.

FIG. 3 is a graph of skin temperature → warmness conversion.

FIG. 4 is a graph of conversion from warm feeling to equivalent set temperature.

FIG. 5 is a graph showing a comfortable range without getting used to.

[Explanation of symbols]

 1 Air Conditioning Casing 2 Blower 3 Air Conditioner Main Unit 5 Car Room Temperature Sensor 7 Temperature Setting Lever (Temperature Setting Means) 14 Face Blowout (Blowout) 661 Temperature Sensing Means 662 Equivalent Set Temperature Calculating Means 663 Temperature Fluctuation Control Means 120 Cabin A Vehicle air conditioner S'Warm sensation Ta set temperature Ta 'Equivalent set temperature ΔT, ΔT' Temperature change range

Claims (1)

[Claims] 1. A casing having a blow-out port into the vehicle compartment, a blower for generating an air flow toward the blow-out port in the casing, an air conditioner body for controlling the temperature of the air in the casing, and a vehicle compartment temperature. A setting means, a room temperature sensor for detecting the passenger compartment temperature, a temperature feeling grasping means for grasping the occupant's temperature sensation, and a predetermined temperature change range related to the high or low of the set temperature,
Correction of the set temperature according to the temperature fluctuation control means for operating the air conditioner body and the temperature sensation grasped by the temperature sensation grasping means so that the detected passenger compartment temperature fluctuates based on the set temperature. And an equivalent set temperature calculation means for performing the temperature fluctuation control means, wherein the temperature fluctuation control means performs a temperature fluctuation operation on the air conditioner main body within a temperature change width corresponding to the equivalent set temperature.