JPH0761762B2 - Vehicle air conditioner - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention automatically controls blowout temperature, blown air volume, etc. so that the temperature inside the vehicle interior is maintained at a set temperature according to environmental changes inside and outside the vehicle interior. The present invention relates to a vehicle air conditioner.

(Prior Art) Some vehicles are equipped with an air conditioner that controls the temperature and humidity inside the vehicle to make the inside of the vehicle comfortable. However, recently, if the passenger sets a desired temperature, the temperature inside the vehicle can be adjusted. Some vehicles have an automatic air conditioning system that automatically controls the temperature of the vehicle.

This type of air conditioner detects the temperature inside and outside the passenger compartment and the strength of sunlight, and controls the air mix door opening, air volume control, outlet control, etc. so that the temperature is set according to the detected temperature. Is done automatically.

FIG. 4 shows the relationship between the blown air volume Q and the blown air temperature T at which the supply and consumption of heat in the vehicle compartment are balanced and stable.
The air conditioner of the automatic air conditioner is controlled so as to move along the line in the direction in which the blown air volume decreases. For example, when the temperature inside the passenger compartment is higher than the set temperature, a large amount of air is sent at a low outlet temperature as shown by A in the figure. Then, when the temperature inside the passenger compartment decreases and approaches the set temperature, the outlet temperature rises. At the same time, the amount of blown air is also reduced to control so as to be balanced in the portion B of the figure where the amount of blown air is small. On the contrary, when the temperature in the vehicle compartment is lower than the set temperature, a large amount of air is sent at a high blowout temperature as shown by C in the figure. After that, when the temperature in the vehicle compartment rises and approaches the set temperature, the blowout temperature is changed. When the air flow rate is lowered, the blown air volume is also reduced to control the equilibrium point so as to move in the direction of B in the figure (see Japanese Patent Laid-Open No. 58-43816).

By the way, in order to purify the air in the passenger compartment, this type of air conditioner may be provided with an air purifier 1 sharing the blower 2 of the air conditioner as shown in FIG. As the air purifier 1, for example, an electrostatic air purifier that collects dust by charging dust in the air is used. In FIG. 5, 3 is an evaporator, 4 is a heater, and 5 is an air mix door that determines the degree of mixing of cold air and warm air by opening and closing the air door.
Indicates the air outlet, and the arrow indicates the air flow.

However, as is well known, an air purifier cannot function normally without a certain amount of air flow, so in the conventional air conditioner, the air flow rate at the equilibrium point as shown in FIG. 4B is low. , If the air purifier is operated when the air volume Q _P (for example, 3 m ³ / min) required to operate the air purifier is greater than that, the capacity of the air purifier cannot be exerted and the air in the vehicle interior is sufficiently purified. There is a problem that if it is impossible to do so, and if the blown-out air volume is increased, it deviates from the equilibrium point in FIG. 4 and the comfortable air conditioning state is impaired.

(Object and Structure of the Invention) The present invention has been made in view of the above points, and is a calculation in which the blowout temperature and the blown air volume of air blown into the vehicle compartment are calculated based on at least the temperature inside and outside the vehicle compartment and the set temperature. In addition to controlling the air flow to reach a certain value, the blower blows air, and in an air conditioning system for vehicles that incorporates an air purifier that shares the blower, secures an air volume that satisfies the function of the air purifier without impairing comfortable air conditioning. The purpose is to do.

In order to achieve such an object, as shown in the overall configuration diagram of the present invention in FIG. 1, the detecting means 7 detects at least the temperature inside and outside the vehicle compartment, and the room temperature setting means 8 sets a desired vehicle interior temperature. Based on the outputs of the detection means 7 and the temperature setting means 8, the calculation means 9 calculates the blown air volume and the blown temperature of the air blown into the vehicle compartment by a predetermined calculation formula, and blows the air by the blower means 10, and the blower means 10 When the operation of the air purifier 11 sharing the same is detected by the purifier operation detection means 12, when the calculated value of the blown air volume is smaller than the reference value required for the operation of the air purifier 11, the correction means 13
By correcting the blown air volume to its standard value,
The correction is made so that the same amount of heat as the calculated value is supplied.

(Example) The present invention will be described below with reference to the drawings.

FIG. 2 shows a block diagram of an embodiment of a vehicle air conditioner according to the present invention.

In the figure, 15 is an auto amplifier composed of a microcomputer, 16 is an inside air temperature sensor that detects the temperature inside the vehicle, 17 is an outside air temperature sensor that detects the outside air temperature, 18 is a solar radiation sensor that detects the amount of solar radiation, and 19 is Room temperature setting device that sets the cabin temperature to a desired temperature, 20 is an engine water temperature sensor that detects the temperature of engine cooling water, 21 is an air mix door opening control circuit, 22 is an air volume control circuit, and 23 is an outlet control circuit. , 24 are air mix doors according to the signal from the air mix door opening control circuit 21.
An actuator that drives 25 to an optimum opening degree, 26 is a fan motor whose rotation speed is controlled by a signal from the air volume control circuit 22, and 27 is an air outlet (the chest, An actuator that controls opening and closing of the door 28 of the foot, defroster), and 29 is a purifier switch that is turned on when the air purifier 12 operates.

Based on the signals from the sensors and the room temperature setting device 19, the auto amplifier 15 calculates the blown air volume and blown temperature at the equilibrium point shown in FIG. During operation of the air cleaner 11, the calculated value of the air flow rate obtained earlier is the reference value Q _P required for the operation of the air purifier 11.
When it is smaller than (for example, 3 m ³ / min), the blowout air amount is corrected to its reference value, and the blowout temperature is corrected so that the same amount of heat as the previously calculated value is supplied.

Next, the operation will be described with reference to the flowchart of FIG.

First, the auto amplifier 15 detects whether the purifier switch 29 is turned on (F-1), and if it is not turned on (when the air purifier 11 is not operating), normal auto air conditioner control is performed (F-). 2). That is, based on the signals from the sensors 16, 17, 18, 20 and the room temperature setting device 19, the auto-amplifier 15 calculates the optimum blowing temperature and blowing air amount on the balance line of FIG. A control signal is output to the control circuits 21, 22 and 23, and the opening degree of the air mix door 25, the rotation speed of the fan motor 26, and the opening degree of the outlet door 28 are set to optimum values accordingly. As a result, the cold air that has been dehumidified and cooled by the evaporator and the warm air that has been warmed by the heater are mixed by the air mix door 25, and are provided in the center of the instrument panel and the air outlets provided on both sides and the lower part of the windshield. The air is blown into the passenger compartment from the air outlet (called defroster) or the foot outlet at the foot.

This automatic air conditioner control is performed so as to move on the balance line in FIG. 4 in the direction in which the blown air volume decreases.

Next, when the purifier switch 29 is turned on (air purifier
(When 12 operates), it is judged whether the blown air volume Q is larger than the reference value Q _P required to operate the air purifier 12 (F
-3), outlet air amount Q is larger than the reference value Q _P automatic air conditioner control is performed (F-2). The magnitude of the blown air volume is determined by the voltage applied to the fan motor 12. Smaller than blown-air amount Q is the reference value Q _P increases the blowout air quantity Q is corrected to the reference value Q _P, the outlet temperature, so that the same amount of heat as for the value obtained by the arithmetic expression is the value provided (F-4). That is, in summer, the amount of blown air is increased and the temperature of blown air is increased to a value that does not change the amount of heat supply as a whole to maintain the balance between heat consumption and heat supply. Also, in winter, the amount of blown air is increased and the temperature of blown air is reduced to a value that does not change the heat supply as a whole.
As a result, the occupant does not feel cold in the summer and does not feel hot in the winter even if the amount of blown air increases, and can maintain a comfortable state.

(Effects of the Invention) As described above, in the present invention, when the calculated value of the blown air volume during operation of the air purifier is smaller than the reference value required for the operation of the air purifier, the blown air volume is set to the reference value. By making the correction and correcting the blowout temperature to a value that supplies the same amount of heat as the calculated value, the heat consumption in the passenger compartment and the heat supply are balanced, so a comfortable air conditioning condition is achieved. It is possible to obtain the effect that it is possible to always secure the amount of blown air that satisfies the function of the air purifier without damaging the air conditioner.

[Brief description of drawings]

1 is an overall configuration diagram of an air conditioner according to the present invention, FIG. 2 is a block diagram of an embodiment of an air conditioner according to the present invention, and FIG.
FIG. 4 is a flow chart of the main part of the air conditioning operation according to the present invention, FIG. 4 is a diagram showing the relationship between the blown air volume Q and the blown air temperature T when heat supply and heat consumption are balanced in the vehicle interior, and FIG. It is a schematic diagram which shows the structure of an air conditioner. 1,11 …… Air purifier, 2 …… Blower, 3 …… Evaporator, 15 …… Auto amplifier, 25 …… Air mix door, 26
...... Fan motor, 29 purifier switch

Claims (1)

[Claims] 1. A detection means for detecting at least the temperature inside and outside the vehicle interior, a room temperature setting means for setting the vehicle interior temperature, and a vehicle interior according to a predetermined arithmetic expression based on the outputs of the detection means and the room temperature setting means. A calculating means for calculating the blown air volume and the blown temperature of the blown air, a blower means for blowing the air having the blown air volume and the blown temperature calculated by the calculating means, and a blown temperature adjusting means and a blown air volume adjustment in the blower means. An air purifier arranged in series with the means, a purifier operation detecting means for detecting whether the air purifier is operating, and the purifier operation detecting means detects the operation of the air purifier, When the calculated value of the blown air volume by the calculation means is smaller than the reference value required for the operation of the air purifier, the blown air volume is corrected to the reference value, and the blowout temperature is Air conditioning system characterized by having a correction means the same amount of heat as for serial operation value is corrected to a value that is supplied.