JPS6230930B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an air conditioning control device for an automobile that controls air conditioning in a vehicle interior of an automobile.

[Conventional technology]

BACKGROUND ART Conventionally, in order to control the air conditioning inside a vehicle interior, some vehicles are equipped with a main air conditioner that adjusts the temperature of air blown from the front of the vehicle interior, and a rear cooler that provides supplementary air cooling at the rear of the vehicle interior. However, since this rear cooler is not equipped with a temperature control mechanism, the temperature difference between the temperature of the air blown out from the main air conditioner to the front of the passenger compartment and the temperature of the air blown out to the rear of the passenger compartment from the rear cooler can change significantly. There is.

This causes the following problems.

(1) The temperature distribution inside the vehicle is wide.

(2) The temperature distribution inside the vehicle is wide, making it difficult to accurately detect the average temperature inside the vehicle.

(3) When the front and rear airflow rates change, the temperature distribution inside the vehicle changes.

(4) If the influence of the rear cooler on the cabin temperature is large, the room temperature will fluctuate greatly if the rear cooler is interrupted, so depending on certain external conditions (outside air, solar radiation, vehicle speed, etc.) Unable to obtain average temperature.

[Problem that the invention seeks to solve]

The present invention was developed in view of the above problem, and when the auxiliary cooling on the rear seat side of the vehicle interior is activated, the cooling capacity is adjusted in relation to the main air conditioning control on the front seat side, so that the cooling capacity is adjusted appropriately. The purpose is to control indoor air conditioning.

[Means for solving problems]

Therefore, in the present invention, in order to achieve the above object, a first evaporator that cools the surrounding air and a heater core that heats the surrounding air are provided in the first ventilation system that blows air toward the front seat side of the vehicle interior. , provided in the first ventilation system, and continuously adjusting the mixing ratio of air cooled by the evaporator and air heated by the heater core, and flowing from the first ventilation system into the vehicle interior. a first temperature adjustment member that adjusts the temperature of the air blown out; a second evaporator that is disposed in a second ventilation system that blows air toward the rear seat side of the vehicle compartment and that cools the surrounding air; a second temperature control member that continuously adjusts the mixing ratio of the air passing through the second evaporator with the bypassed air to adjust the temperature of the air blown into the vehicle interior from the second ventilation system; A technical means is adopted in which the second temperature regulating member is provided with interlocking means for operating the second temperature regulating member in conjunction with the first regulating member.

[Effect]

By adopting the above technical means, in the first ventilation system, the first temperature regulating member continuously adjusts the mixing ratio of cooled air and heated air. The temperature of the air blown into the front seat side of the vehicle interior is continuously and smoothly controlled. In addition, since the second temperature control member provided in the second ventilation system operates in conjunction with the first temperature control member, the air is blown out from the second ventilation system to the rear seat side of the vehicle interior. The temperature of is also continuously and smoothly controlled in the same way as above.

In this way, the temperature of the air blown into the vehicle interior from the second ventilation system changes in correspondence with the temperature of the air blown into the vehicle interior from the first ventilation system, and the temperature distribution of the air temperature in the vehicle interior changes. becomes smaller.

〔Example〕

Next, the present invention will be explained with reference to embodiments shown in the drawings.

Here, before explaining the characteristic parts of the present invention in this embodiment, the control on the refrigeration cycle of this embodiment will be explained.

FIG. 1 is a block diagram of a refrigeration cycle in the configuration of this embodiment, and FIG. 2 is an overall block diagram showing a control device.

In Fig. 1, 1 is a refrigerant compressor, 2 is a condenser, 3 is a solenoid valve, 4 and 5 are expansion valves, 6 is an evaporator, 7 is an auxiliary evaporator, and 8 is an EPR (Evaporator Pressure).
Regulator). In addition, the auxiliary evaporator 7
The passage of refrigerant can be interrupted or interrupted by a solenoid valve 3.
Furthermore, in FIG. 2, the temperature inside the vehicle compartment 18 is determined by the signals from the room temperature sensor 16, the outside air sensor 17, the potentiometer 11 indicating the position of the air mix damper 10, which is the first temperature adjusting member, and the temperature setting device 14. is processed in the control circuit 15, and the air mix damper 10 is moved via the power servo 13 to adjust the proportion of cooling air that has passed through the evaporator 6 to the heater core 9, thereby mixing cold air and warm air. The purpose is to control the ratio and adjust the temperature inside the vehicle compartment 18 to a predetermined value. 23,2
Reference numeral 4 denotes a blower motor that adjusts the amount of air that is sent into the vehicle compartment 18 from the air outlets 21 and 22, after passing through the evaporator 6, the auxiliary evaporator 7, the heater core 9, and the like to exchange heat. The resistance of the potentiometer 12, which serves as a temperature setting resistance for the rear cooler, whose resistance value changes in conjunction with the resistance value of the temperature sensor 19 installed downstream of the auxiliary evaporator 7 at the air outlet 22 and the air mix damper 10. A solenoid valve 3 which processes the value by a rear cooler amplifier 20 and cuts off the refrigerant passing through the auxiliary evaporator 7.
performs on-off control of the auxiliary evaporator 7.
Controls the abilities of. Further, as shown in FIG. 3, the rear cooler amplifier 20 includes voltage amplifiers 25 and 2 that convert the respective resistance values of the temperature sensor 19 and the potentiometer 12 into voltages and amplify them.
6. A comparator 2 that compares both output voltage levels and turns on and off the relay 28 for controlling the solenoid valve 3.
7, etc. In this way, the compartment 1
At 8, temperature-controlled air is blown out from respective outlets 21 and 22 of the first ventilation system A and the second ventilation system B.

Next, the operation of the above configuration will be explained.
Now, air mix damper 10 is set to maximum cooling (max.
cool) position, the potentiometer 12, which is the temperature setting resistance of the rear cooler, shows a resistance value equivalent to max cool, and the rear cooler amplifier 20 keeps the solenoid valve 3 in the on state, and the cooling capacity of the auxiliary evaporator 7 can be maximized. Next, when the air mix damper 10 moves to the hot side, the potentiometer 12 shows a resistance value according to the amount of movement, and the rear cooler amplifier 20 responds to this by turning the solenoid valve 3 on and off, and the The average temperature of the air blown into the chamber 18 from the rear cooler is increased by an amount corresponding to the amount of movement of the air mix damper 10. As a result, the air outlet 21, 22
The temperature difference between the blown air can be further reduced, the temperature distribution between the front seats and the rear seats in the passenger compartment 18 is improved, a more comfortable air-conditioned space in the passenger compartment can be obtained, and the error of the room temperature sensor 16 can be reduced. It is smaller and easier to control the air conditioning inside the vehicle.

Furthermore, when the air mix damper 10 moves to the hot side, the resistance value of the potentiometer 12 becomes a very large value, the solenoid valve 3 remains in the OFF state, and the cooling operation of the auxiliary evaporator 7 is automatically stopped. I can do it.

Therefore, in a car equipped with a rear cooler,
By adjusting the cooling capacity of the rear cooler in accordance with the temperature of the air blown out from the main air conditioner, it is possible to reduce the temperature difference between various parts in the vehicle interior 18, thereby controlling comfortable air conditioning.

Next, specific examples of the second temperature regulating member and interlocking means of the present invention will be described. Figure 4 shows an example of this, in which in the second ventilation system B of the rear cooler,
On the air suction side of the auxiliary evaporator, there is a second temperature regulating member that continuously adjusts the mixing ratio of the air passing through the auxiliary evaporator 7 and the air passing through the bypass passage 22b without being cooled. An air mix damper 30 is provided.

The second air mix damper 30 is adjusted by an actuator 29 that is interlocked with the actuator 13 that adjusts the opening of the first air mix damper.

As a result, the opening degree of the evaporator 10 in the first ventilation system A and the opening degree of the evaporator 30 in the second ventilation system B are continuously adjusted in substantially the same manner. It becomes possible to perform much finer temperature control than temperature control based only on refrigeration cycle control, and it becomes possible to further reduce the temperature difference between each part of the vehicle compartment 18.

In this case, the solenoid valve 3 may be turned off at times other than during cooling, or the solenoid valve 3 may be omitted.

Further, in the embodiment shown in FIG. 2, a potentiometer 12, a temperature sensor 19, a rear cooler amplifier 20
Although the solenoid valve 3 was shown to be on-off controlled in the above, a thermostat is used instead, and the setting value of the thermostat is changed by another actuator that operates proportionally to the actuator 13, and the solenoid valve 3 on-off control may be performed.

In addition, the auxiliary evaporator 7 in the rear cooler
In addition to the cooling capacity control, the blower motor 24 of the rear cooler may also be controlled to change speed according to the opening degree of the air mix damper 10, and in this case, the capacity of the rear cooler can be further finely adjusted.

As described above, in the present invention, the second temperature adjustment member continuously changes the amount of adjustment in conjunction with the first temperature adjustment member, so that the amount of air blown into the vehicle interior from the second ventilation system is adjusted. The temperature changes appropriately in accordance with the temperature of the air blown into the vehicle interior from the first ventilation system, and there is an excellent effect that the distribution of air temperature in the vehicle interior can be kept small.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing a refrigeration cycle of an automobile air conditioner to which the present invention is applied, FIG. 2 is an overall block diagram showing the control section of the above-mentioned automobile air conditioner, and FIG. 3 is a main part of FIG. 2. Electrical wiring diagram showing detailed configuration, No. 4
The figure is a partial configuration diagram showing an embodiment of the present invention. 3... Solenoid valve, 6... Evaporator, 7... Auxiliary evaporator, 9... Heater core, 10... Air mix damper, 12... Potentiometer, 19... Temperature sensor, 20... Rear cooler amplifier forming control means.

Claims (1)

[Scope of Claims] 1. A first evaporator that is disposed in a first ventilation system that blows wind toward the front seat side of the vehicle interior, that cools ambient air, and a heater core that heats ambient air; It is provided in a ventilation system and continuously adjusts the mixing ratio of the air cooled by the evaporator with the air heated by the heater core to control the air blown into the vehicle interior from the first ventilation system. a first temperature control member that adjusts temperature; a second evaporator that is disposed in a second ventilation system that blows air toward the rear seat side of the vehicle compartment and that cools ambient air; and a second evaporator that cools ambient air. a second temperature control member that continuously adjusts the mixing ratio of the passing air and the bypassed air to adjust the temperature of the air blown into the vehicle interior from the second ventilation system; An air conditioning control device for an automobile, comprising interlocking means for operating a temperature regulating member in conjunction with the first regulating member.