JPS601013A - Car air conditioner - Google Patents

Abstract

PURPOSE:To prevent unintended and wasteful control of an air conditioner and improve the fuel saving by erasing air conditioning conditions during the preceding travel except a preset temperature when an ignition switch is turned off. CONSTITUTION:When an ignition key 44 is turned off at the end of the travel, air conditioning conditions are erased by an erasing means 45, and a preset temperature is stored in a memory means 43a. Later, when the key switch 44 is turned on, an intake door and a blowout port are stored in the first setting means 43b automatically or based on the information of a manual switch, and a fan and a compressor are turned off. Thereby, the air conditioner is controlled based on the stored contents from the setting means 43b. Accordingly, there is no trouble to stop the air conditioner operation on purpose or change the conditions, and the fuel saving effect is large.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an automatic mode vehicle air conditioner in which air Iij, +J control is carried out appropriately.

(b) Conventional technology 11r Some vehicles are equipped with a near conditioner (hereinafter referred to as "air conditioner") that dehumidifies the interior of the vehicle and adjusts it to an optimal temperature. There is a tendency for luxury cars to be equipped with air conditioners called automatic air conditioners, which automatically adjust the temperature to the optimum temperature in response to changes in temperature and driving conditions. Fig. 1 shows the general configuration of this type of air conditioner together with a control circuit.The intake door 1 is switched to a blower core 3 rotated by a motor 2, which takes in outside air A or inside air B from an air intake 4 to the evaporator. 5, after which the air is dehumidified and cooled, a part of the air is heated by the heater core 7 according to the opening degree of the air mix door 6, and mixed with the unheated part again to obtain air at a desired temperature. Air is blown upward into the room from the vent outlet 9 and from the defroster outlet 10 to the defroster nozzle. Reference numerals II and 12.13 are a foot door, a vent door, and a differential door that control the air outlet 8.9 and IO, respectively. Evaporator 5
is a compressor 15 that can be moved by 15 sections by the engine 14.
When the refrigerant is compressed into a liquid state and vaporized, the heat of vaporization cools and dehumidifies the sucked air. (2) 6 is a condenser that liquefies the vaporized refrigerant, and 17 is an expansion valve. Cooling water from the engine 14 is circulated through the heater core 7 via a water cock 18 to heat the air. The intake door 1, air mix door 6, and each blowout differential door ■1.12.13 are driven by actuators 19.20.21.22.23 provided respectively, and these actuators are driven by respective solenoid valves 24.25. 26.27.28. Each solenoid valve is supplied with negative pressure from a vacuum tank 29 connected to the intake manifold of the engine 14, and is energized based on a command from a control section shown in FIG.

FIG. 2 is a block diagram showing the control circuit of the air conditioner, in which the control section 30 controls the desired vehicle room temperature set by the room temperature setting device 31, the 11 radiation sensor 32, the cooling air temperature sensor 33, and the outside temperature. The required blowout temperature is calculated based on the temperatures detected by the sensor 34 and the room temperature sensor 35, respectively, and the opening degree of the air mix door 6 is calculated based on the required blowout temperature. .0 is selected to control the position of the intake door l.

In addition, when the mode selection switch 36 is operated to select the pie level mode, which blows out hot air from the air outlet 8 and the cold air from the air outlet 9, and the defroster mode, which removes fog from the windshield, the air outlet changes accordingly. Can be switched to air outlet.

In addition to setting the desired cabin temperature, the temperature setting device 31 can also be set to maximum heating mode or maximum cooling mode. The provided water cock 18 is closed.

On the other hand, the control section 30 controls the rotational speed of the pro-fan motor 2 by controlling 30 transistors 37 based on the temperature difference between the set temperature and the room temperature, thereby controlling the air volume. In this case, the engine water temperature is detected by the engine water temperature sensor 38, and the timing of blowing out the hot air is controlled.

In addition, in order to prevent the evaporator 5 from freezing using the output of the cooling air temperature sensor 33 provided on the outlet side of the evaporator 5, the compressor 1
It controls the on/off of 5. In addition, 36 is an air outlet selection switch that automatically or manually controls the air outlet;
0 is a solenoid valve that controls opening and closing of the water cock I8, 41 is a fan switch that automatically or manually controls the blower fan, and 42 is a manual changeover switch for the intake door.

By the way, as shown in Figure 81S3, on rainy days, to prevent the window from clouding, the intake door is sometimes used to turn on the outside air, the old JIO is set to the differential mode, and the fan is set to the maximum landscape setting. . However, these air conditioning conditions were conventionally selected by lever operation, so even if the ignition key is turned off, the air conditioning conditions are maintained as they are, and when you get in the car and turn on the ignition key, the air conditioning condition will be changed to the previous air 6J condition. will be carried out.

In the case of such an air conditioner, if you do not ride the vehicle for a long time during periods of unfavorable weather or the change of seasons, and then return to the vehicle (even though the outside temperature or 1-I radiation conditions have changed), Since the operation starts with the previous air conditioning conditions stored in the storage means 43, there is a risk that the air conditioning conditions will be unexpectedly different from the desired ones.

Purpose of the Invention and Outcomes The present invention has been made in view of the above points.It is an object of the present invention to perform appropriate air conditioning control in consideration of the weather when using a car, and for that purpose, the ignition When the switch is turned off, the set temperature data erases the 1.a information regarding the air outlet, air volume, and intake door air conditioning conditions, and when the ignition switch is turned on afterwards, the intake door and air outlet are reset to the set temperature or manual switch. When the fan switch is pressed, the air conditioning is controlled, including the blowout air volume and compressor control.

) Example The present invention will be explained below based on the drawings.

The configuration of the air conditioner according to the present invention is as shown in FIG. 4, and its functional flowchart is as shown in FIGS. 3 and 5, which is different from the conventional example shown in FIG. ing. That is, as shown in Figures 3 and 5, the air conditioning control conditions during the previous run were: the outlet mode was fixed at the vent outlet, the blower fan speed was at low speed, the intake door was in the outside air position, and the set temperature was 26. Suppose it is ℃ (
F-1) When the vehicle finishes driving and turns the ignition key 42 to the OFF position (F-2), the erasing means 45 erases the air conditioning control conditions and the set temperature is stored in the storage means 43a.

(F-3) After that, when you get in the car and turn on the ignition key switch 44, the intake door and one air outlet are automatically stored in the first setting means 43b based on the information from the manual switch, and the fan and compressor are Turned off (F-4) (F-5). That is, the setting means 4
The air conditioning is controlled based on the memory contents from 3b.

In an environment where you can drive under comfortable temperature conditions without having to turn on the fan or compressor, it is a good idea to prevent the fan and compressor from turning on automatically when you operate the ignition key in order to save energy. It is also convenient. Also, if you wish to perform cooling, dehumidification, and air volume control, press the fan switch 41 (F
-6) Information regarding the strength of the air volume and on/off of the compressor is stored in the second setting means 43c, and air conditioning is controlled based on the stored contents and the stored contents of the first setting means 43b (F-7).

As shown in Figure 3, with conventional air conditioners, the air conditioning conditions at the time of the previous trip are maintained even when the ignition switch is turned off, and when the ignition switch is turned on after riding the vehicle, the air conditioning operates again under the same air conditioning conditions. but .

It will be done.

In this way, in the present invention, when the ignition key is turned on for restart after turning off the ignition key, only the set temperature of the air conditioning conditions during the previous run is memorized and other air conditioning conditions are erased. So there was an unintended sky 1. 'il fli! It is possible to prevent unnecessary control and is useful in terms of fuel efficiency.

(e) As described in detail, in the present invention, the air conditioning conditions at the time of the previous run, except for the set temperature, are erased by turning off the ignition switch, and then when the ignition switch is turned on, the air conditioning conditions at the intake door and air conditioner are erased. The air conditioning is controlled based on the information about the outlet, and when the fan switch is turned on, the air conditioning operation is performed based on the information about the blowout air volume and the compressor, so there is no need to stop the air conditioning operation or change the conditions. You can also expect a fuel efficiency □ effect.

[Brief explanation of the drawing]

Fig. 1 is a schematic configuration diagram of a conventional air conditioner, Fig. 2 is a block diagram of a control circuit of the conventional air conditioner, Fig. 3 is a diagram showing the air conditioning conditions of the conventional air conditioner, and Fig. 4 5 is a block diagram of an embodiment of the control circuit for an air conditioner according to the present invention.
This figure is a flowchart showing the control operation of the air conditioner shown in FIG. 4. 1...Intake door 2...Blower fan motor 3...Blower fan 5...Evaporator 6...
Air mix door 7... Heater core 8.9.10.
...Air outlet 14...Engine 15-...Compressor 16...Condenser 18...Water cock
19-22...Actuator 24-28...Solenoid valve controller...Control unit 31...Room temperature setter 32...Solar radiation sensor 34...Outside temperature sensor 35...Room temperature sensor 36...・Full 1 old” selection switch 4I…Fan switch patent applicant Nissan Motor Co., Ltd. agent Patent attorney Hiroshi Suzuki

Claims (1)

[Claims] Automatically or manually switch the air outlet, air volume, and intake door air conditioning conditions based on the required air outlet temperature calculated based on at least the vehicle interior temperature, outside air temperature, and set temperature.ii;! In a fully functional vehicle air conditioner, there is a set temperature record means for retaining the set temperature data when the ignition switch is turned off, and a means for storing the set temperature data on the air outlet 1 and the intake door (3) when the ignition switch is turned on. a first setting means for storing information; a second setting means for storing information regarding the blowout air volume and compressor control when the sun switch is turned on;
The empty i stored in the setting means and the second setting means
The vehicle air conditioner is characterized in that the air conditioning is controlled based on the set temperature data stored in the set temperature storage means set by 2 degrees (D'IJ), and the erasing means for erasing the 117 information regarding the 'l'J condition. Device.