JPS6291307A - Air conditioning device for vehicle - Google Patents

Abstract

PURPOSE:To improve the rate of operation of a compressor, by providing two connections of an A/C switch and an ECO switch in a magnet clutch actuating switch of the compressor and constituting an equipment so as to control a preset temperature and a mixing door to be changed by proper use of the switches. CONSTITUTION:When large room cooling power is necessary, an A/C switch 201 is controlled to switch a switching circuit 21 to a position of A/C, and a compressor is operated to the maximum rate of operation by controlling a setting lever 221 and a magnet clutch 30 by an evaporator temperature 19. When no large room cooling power is required, an ECO switch 203 is controlled to switch the circuit to a position of ECO and decide by an outside air temperature decision circuit 24 an outside air temperature level 25, and if it is not less the preset temperature, an air mixing damper 17 is fixed to a position of cold, and the magnet clutch 30 is controlled by the detection temperature 19. If the temperature is in a value not more than the preset temperature, a mixing door is actuated by a temperature setter 22, and the compressor is on-off controlled. By this constitution, the rate of operation of the compressor is improved.

Description

[Detailed description of the invention] Utilization field of Sanshiba-ni The present invention relates to a dual-purpose air conditioner.

Conventional technology In recent years, this type of vehicle air conditioner has been gaining popularity as an energy-saving measure by reducing the operating rate of the compressor when the outside temperature is not very high (for example,
9-33688).

Conventionally, such control has been carried out, for example, as shown in FIG.
7 resistor 9, mitsuknu actuator control circuit 12,
Mix actuator 10. air mix door 5.2
Consisting of a continuous clutch 8, a thermo circuit 6, a temperature detector 7, and a magnetic clutch 1, 1) the resistance can be arbitrarily changed using the variable resistor 9 (No. 11), and the mix actuator control circuit 12 can mix the resistance depending on the resistance value. The output shearmic store 5 was being operated on the actuator 10.

In addition, independent of this operation, when one of the two-way switch 8 (A/C switch 81) is operated, the temperature of the temperature detector 7 that detects the temperature of the evaporator 2 and the setting on the verge of freezing are set. When the temperature is compared with the temperature by the thermo circuit 6, the magnetic clutch 1 is turned on and off, and the other side of the dual switch 8 (ECO switch 83) is operated, the temperature detector 7 is detected.
This causes the apparent resistance to increase, resulting in a higher temperature set point, which reduces the compressor's operating rate.

Problems to be Solved by the Invention With such a conventional configuration, when the outside temperature is relatively low, when the ECO switch is operated, the cabin temperature will drop below the optimum temperature. In some cases, the vehicle interior temperature is adjusted to the optimum temperature by mixing hot air with hot air, which results in energy saving - 1 - wasteful operation of the compressor.

The present invention has been made in view of the above points, and an object of the present invention is to effectively utilize the operation of the compressor without waste or waste, and to set the vehicle interior temperature to the optimum temperature.

Means for Solving the Problems In order to solve the problems described in 2., the present invention provides an air mix door that changes the mixing ratio of cold air and hot air, a mix actuator that drives the air mix door, and an air mix door that changes the mixing ratio of cold air and hot air. a temperature setting device that changes the opening degree of the evaporator, a temperature detector that detects the temperature of the evaporator or the blowout temperature, a magnetic clutch that connects and disconnects the compressor, a dual switch that operates the magnetic clutch, and an air conditioner controller. The air conditioner controller is actuated by the temperature setting device when one of the dual switches is operated, and a temperature setting value is set for turning the magnetic clutch ON and OFF by comparing it with a signal from the temperature detector. A temperature setting value that fixes the air mix door to the cold side when the outside air temperature is higher than the set value when the other switch is operated and the temperature setting device is used to turn the magnetic clutch ON and OFF. When the outside temperature is below the set value, the mix actuator is activated by the temperature setting device, and the magnetic clutch is turned on and off? ! The temperature is set to 2 degrees higher than the low temperature set point a degree.
'Function With the above configuration, the present invention fixes the air mix door to the cold side by operating the other switch when the outside air temperature is relatively low and exceeds the set value, and furthermore, the temperature sensor is set by the temperature setting device. It is possible to optimally adjust the set temperature compared to the temperature, and when the outside temperature is lower than the set value, that is, when dehumidification is mainly used rather than cooling, the mix actuator is activated by the temperature setting device, and the magnetic clutch is activated. Since the temperature setting value for turning ON-OFF is set to a temperature higher than the minimum temperature, the operation of the compressor can be used effectively and the cabin temperature can be adjusted to the set temperature.

Embodiment FIG. 1 is a diagram showing an embodiment of the vehicle air conditioner according to the present invention. In Figure 1, 30 turns on the compressor.
-Magnetic clutch to be turned off, 14 is evaporator, 1
5 is a ventilation duct, 16 is a heater core, 17 is an air mix door, and 27 is a mix actuator for driving the air mix door, which has a built-in potentiometer 271 for detecting the position of the air mix door 17. A temperature detector 19 detects the temperature of the evaporator 14 and is composed of a thermistor. 20 is a double switch, and when large cooling capacity is required, A/C switch 20 is used.
1, and at this time the A/C lamp 202 lights up.

Furthermore, when the cooling capacity is not so necessary, the EC◯ switch 203 is operated, and at this time the ECO lamp 204 lights up. 22 is a temperature setting device, 31 is an A/C control circuit,
This A/C control circuit includes an A/C@EC○ switching circuit 21,
Thermo circuit 18, outside air temperature determination circuit 24, mix actuator control circuit 26, E CO, lfL resistor 23,
It is composed of an outside air lrA Iq detector 25.

In the old days, when a large cooling capacity was required, the A/C was set up by Kokichi, who operated the A/C switch 201.
-EC01 male changer 11 +1 person 21 directly connects the resistance 41 of the I setting device 22 to the mix actuator control circuit 26, and when the setting lever 221 is operated two times, the current 11L resistance value is controlled by the mix actuator. When the circuit 26 reads and drives the mix actuator 27, it also reads the resistor of the potentiometer at the same time, so that the air mix door 17 is in a predetermined position.
M＜It is moving.

Further, the A/C-EC◯ switching circuit 21 outputs a signal to the thermo circuit 18 such that the set temperature is the lowest.

y) The thermo circuit 18 compares and determines the temperature from the temperature detection Hg 19 with the lowest set value, and outputs an ON-OFF signal to the magnetic clutch, so that the operating rate of the compressor is at its maximum.

If the cooling capacity is not so required, by operating the EC○ switch 203, the EC○ mode is inputted to the A/C-EC0 switching circuit 21, and the EC○ mode is set. At this time, the outside air temperature determination circuit 24 reads the outside air temperature from the outside air temperature detector 25, and when it is higher than the set temperature, outputs a signal of the content to the A/C-EC0 switching circuit 21.
By the C-EC○ switching circuit 21, the resistance of the temperature setting device 22 is connected in series with the temperature detector 19, and when viewed from the thermo circuit 18, the apparent resistance of the temperature sensor 19 is increased, and the temperature setting device 22 is connected in series with the temperature sensor 19. The magnetic clutch 30 of the thermo circuit 18 is turned ON according to the arbitrary position of the setting lever 221 of 22.
-The set temperature for turning off can be freely adjusted to a higher value.

At the same time, the A/C/ECO switching circuit 21 outputs a signal to the mix actuator control circuit 26 to fix the air mix door 17 to the cool side.

Furthermore, when the outside air temperature is below the set temperature, that is, when dehumidification is mainly performed rather than cooling, the outside air temperature determination circuit 24 outputs the content to the A/C-EC0 switching circuit 21, and the A/C
-The pEco resistor 23 is connected in series to the temperature detector 19 by the -EC0 switching circuit 21, and the thermo circuit 18 turns the magnet clamp 30 ON -OFF.Whether the set temperature is higher? Fixed and spread each time. At the same time, the air mix door is moved in accordance with the arbitrary position of the setting lever 221 by directly connecting the resistor of the crystal regulator 22 to the mix actuator control circuit 26.

Effects of the Invention As described above, the present invention enables the variable resistor for operating the air mix door in the A/C mode to be set to a thermostat when the outside air temperature is within the set temperature range in the ECOC mode. Used as a variable resistor to adjust the temperature of the circuit, and forcibly fixes the air mix door in the cool side position, and increases the set temperature of the thermo circuit when the outside temperature is below the set 1Q degrees. The compressor is used as a variable resistor to operate the air mix door.
This allows efficient operation of the sensor without waste.

[Brief explanation of drawings]

FIG. 1 shows a vehicle JTI air 10 according to an embodiment of the present invention.
・Circuit diagram showing a conditioner; FIG. 2 is a circuit diagram showing a conventional vehicle air conditioner. 14... Evaporator, 15... Ventilation duct,
16...τ? Mikusudo'γ...Heater core, 17......,
1B...Thermo circuit-19...Temperature detector, 20...Double switch, 21...
・A/C-EC○ switching circuit, 22...Temperature setting device, 23...ECO resistor, 24...Outside air temperature determination circuit, 25...Outside air Temperature detector, 26.
...Mix actuator control circuit, 27...
...Mix actuator, 29...Battery, 30...Magnetic clutch, 31.
...A/C control circuit. Name of agent: Patent attorney Toshio Nakao Haka 1/7
-1 Niami, ■Cusdoor 19- Temperature detector 20 - Dual switch type II prisoner 22 - Temperature setting device 2
7--Mix actuator 30--Magneztokura Sochi Fig. 2

Claims (1)

[Claims] An air mix door that changes the mixing ratio of cold air and hot air, a mix actuator that drives the air mix door, a temperature setting device that changes the opening degree of the air mix door, and a temperature that detects the temperature of the evaporator or the blowout temperature. a detector;
The air conditioner controller is equipped with a magnetic clutch that connects and disconnects the compressor, a dual switch that operates the magnetic clutch, and an air conditioner controller, and the air conditioner controller is activated by the temperature setting device when one of the dual switches is operated. and compares the signal from the temperature sensor to set the temperature setting value that turns the magnetic clutch ON and OFF to the lowest temperature, and when the other switch is operated, the mix door is turned on when the outside temperature is higher than the set value. It is fixed to the cold side, and the temperature setting device is used to change the temperature setting value that turns the magnetic clutch ON and OFF, and when the outside temperature is below the set value, the mix actuator is actuated by the temperature setting device, and the magnetic clutch is turned ON. - A vehicle air conditioner in which a temperature setting value for turning off is set at a temperature higher than a minimum temperature.