JPH0585375B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a car air conditioner control device that includes an inside/outside air intake switching device, an air cooling device, and an air blowing distribution device.

[Conventional technology]

In order to prevent window glass from fogging, it is common practice to blow air from a ventilation device onto the window glass. In this case, a control device has already been proposed in which the air cooling device is activated and the outside air intake mode is also used in order to maximize the effect of defogging the window glass.

[Problem to be solved by the invention]

In the previously proposed device, the air cooling device is always activated in conjunction with the operation of the defrost device, and the mode is set to outside air intake mode, so there is not much need for a fog removal effect, and it is not desirable to activate the air cooling device. This was inconvenient when the outside air temperature was known to be low enough or dry enough, or when the outside air mode was not set (when the outside air was dirty).

Therefore, the present invention enables manual operation of the air cooling system or the internal/external air intake switching device even when the defrost operating device is operating, and allows the operating state to be set based on the passenger's will without repeating the operation. The purpose is to be able to maintain it at the next operation.

[Means to solve the problem]

In order to achieve the above object, the present invention provides a car air conditioner in which a ventilation device that sends air toward a vehicle interior is equipped with an inside/outside air intake switching device, an air cooling device, and an air blowout distribution device, wherein the blowout distribution device is connected to a window. A defrost operating device that sets a mode for blowing onto glass, and a manual operating device that is provided on a control panel of a car air conditioner so that it can be manually operated by a passenger, and that manually sets the operating state of the air intake switching device, the air cooling device, etc. , an operating state of at least the internal/external air intake switching device of the internal/external air intake switching device and the air cooling device, which is manually set in response to the operation of the manual operating device when the defrost operating device is operating; and a control device that operates at least the internal/external air intake switching device according to the operating state stored in the storage device when the defrost operating device is operated. adopt.

[Function and effect of the invention]

According to the above technical means, by manually operating the manual operating device, the occupant can freely switch at least the internal and external air intake during the defrosting operation according to the occupant's will. Therefore, for example, when driving in a traffic jam in a city, the intake of inside air can be manually set to avoid intake of contaminated outside air.

Moreover, the operating state of the internal/external air intake switching device can be stored in the storage means, and the internal/external air intake switching device can be activated the next time the defrost operation is performed according to the stored contents, so that the same environment can be used. There is no need to set the switch between internal and external air intake each time you drive repeatedly, which greatly reduces the hassle of manual operation.

〔Example〕

In this embodiment, the present invention is applied to a generally known automobile air conditioner using a cold air/warm air mixing method. In FIG. Certain outside air intake ports, 1b and 1b' are inside air intake ports, 2a and 2b are inside and outside air switching dampers that open and close both the intake ports 1a, 1b and 1b', and 3a and 3b are inside and outside air switching dampers 1.
diaphragm actuators for opening and closing a, 1b, 1b', 4a, 4b are solenoid valves, 5 is an electric blower, 6 is a refrigerant evaporator of the refrigeration cycle, 7 is an expansion valve, 8 is a liquid receiver, 9 is a condenser, A compressor 10 is driven by an automobile engine 12 via an electromagnetic clutch 11, and these devices 7 to 11 and the evaporator 6 constitute a refrigeration cycle.

13 is a heater that uses engine cooling water as its heat source;
It is provided in series downstream of the evaporator 6 within the ventilation duct 15, and the flow of engine cooling water is controlled by the electromagnetic valve 14. Reference numeral 16 denotes a temperature adjustment damper, which adjusts the amount of heating by the heater 13 by adjusting the ratio of air passing through the heater 13 to air passing through the bypass passage 17.

Reference numeral 18 denotes a heating outlet, which blows warm air toward the passenger's feet in the vehicle interior. Reference numeral 19 denotes a defrost outlet, which blows out warm air to the front window glass of the vehicle. Reference numeral 20 denotes a cooling air outlet, which blows cold air toward the upper body of the occupant inside the vehicle. 21
a, 21, 21b are these air outlets 1, respectively.
8, 19, and 20 are blow-out mode switching dampers that switch to open and close, 21a is a heating switching damper, 21 is a defrost switching damper, 21b is a cooling switching damper, 22a is a diaphragm actuator that opens and closes the outlet switching damper 21a, 22b is a diaphragm actuator that opens and closes the outlet switching dampers 21 and 21b, and 23a and 23b are solenoid valves.

24 is a diaphragm actuator that opens and closes the temperature adjustment damper 16; 25 is this diaphragm actuator 2;
This is a negative pressure regulator that adjusts the negative pressure supplied to 4. It has two built-in solenoid valves 26 and 27, and these two solenoid valves 26 and 27 open and close the negative pressure pipe 28 and the atmosphere opening 29, respectively. It is structured to do this. The intake negative pressure of the automobile engine 12 is applied to the negative pressure pipe 28.

In FIG. 2 showing the electric control circuit, 40 is a computer for controlling various operating modes, temperature, suction port, and outlet port, and receives various information signals and performs control based on a preset control program. Execute the process and perform the steps 4a and 4.
It electrically commands the operation of the functional elements b, 14, 23a, 23b, 26, and 27.

34 is a control panel including various mode switches, a fluorescent display tube that displays the set temperature, and a mode display LED; 35 is a driver for the drive motor of the electric blower 5; 36 is a power supply circuit; 33 is a control panel that includes various sensors (inside air sensor , outside air sensor, solar radiation sensor, post-evaporation sensor, hot water sensor, potentiometer), 32 is an A/D conversion circuit that converts this sensor signal into a digital value, 31 is a CPU (central 39 are various actuators (electromagnetic valves 23a, 23b for switching the outlet, electromagnetic valves 4a, 4b for switching between inside and outside air, electromagnetic valves 26, 27 for controlling the temperature adjustment damper 16, electromagnetic valve 14 for engine cooling water,
This is a driver for a heater relay, a relay for electromagnetic clutch 11).

37 is an ignition switch for the automobile engine 12, and 38 is an in-vehicle battery.

The CPU 31 receives the signal from the sensor 33 converted by the A/D conversion circuit 32, and receives the signal from the control panel 3.
Receives signals from 4, performs data processing and calculations based on these signals, and operates various actuators and blowers 5.
control.

These controls executed by the CPU 31 are illustrated in FIG. 3, and most of the illustrations are well known. A defrost operating routine is incorporated in accordance with the present invention and is shown in detail in FIG.

The features of this device will be explained with reference to FIG. First, in step 101, it is determined whether the defrost operation switch 34 in the mode switch 34 has been manually operated. When the defrost operation switch 34 is operated, data relating to the operation of the suction ports 1a, 1b, 1b' and the compressor 10 in the defrost operation mode is read from the nonvolatile memory 31A in step 102. This data is different from the suction port and compressor data used in other control routines.

Next, in step 103, it is determined whether the outside air intake switch 34e in the mode switch 34 has been operated, and in step 105, it is determined whether the inside air intake switch 34f has been operated. Execute 104 and 106. step
In step 104, the suction port is set to take in outside air, and in step 106, it is set to take in inside air.

Next, in step 107, the compressor operating switch 34g in the mode switch 34 is activated.
Each operation of the compressor stop switch 34h is judged in step 108, and the steps are performed according to the judgment result.
Set the compressor to operate (ON) or stop (OFF) using 109 and 110.

The contents set in steps 104, 106, 109, and 110 are stored in the nonvolatile memory 31A in step 111.
to be newly memorized. This stored content is read out in step 102 the next time the program is processed.

Furthermore, in step 112, a defrost operating mode is set.

In the output routine shown in FIG. 3, a control output is applied to the actuator driver 39 shown in FIG. 2 to operate the car air conditioner according to the settings of the previously processed control routines and defrost operation routine.

In this device, in the defrost operation routine, the inside air intake switch 34f, the outside air intake switch 34e, the compressor operation switch 34g,
According to the manual operation of the compressor stop switch 34h, the internal/external air intake switching dampers 2a, 2b are switched, and the passenger can freely manually switch the operation of the compressor 10 to stop. Moreover,
Since the switching contents based on the passenger's manual operation are memorized, the next time the defrost operation is set, the same state as when it was memorized can be reproduced.
When the vehicle repeatedly travels in the same environment (for example, in a city, a suburb, etc.), there is no need to set the internal/external air intake and the operation stop of the compressor 10 each time.
Therefore, the complexity of manual operation by the occupant can be reduced.
Note that in the above embodiment, the control of the present invention is applied to both the switching between the inside and outside air intakes and the switching of the operation stop of the air cooling system, but the control of the present invention may also be applied only to the switching between the outside and outside air intakes. good.

[Brief explanation of the drawing]

Fig. 1 is an overall configuration diagram of an embodiment of the present invention, Fig. 2
The figure is an electrical wiring diagram, and FIGS. 3 and 4 are flowcharts of the computer control program. 1...Ventilation duct, 2a, 2b...Inside/outside air switching damper forming an inside/outside air intake switching device, 5...Electric blower forming a ventilation device, 6...Evaporator forming an air cooling device, 19...Defrosting blower exit, 2
1, 21a, 21b...Blowout switching damper constituting an air blowout distribution device, 31...Constituting a control device
CPU, 31A...Non-volatile memory serving as storage means,
34...Mode switch serving as a manual operation device.

Claims (1)

[Claims] 1. A ventilation device that sends air toward the vehicle interior,
In a car air conditioner equipped with an inside/outside air intake switching device, an air cooling device, and an air blowout distribution device, a defrost operating device that sets the blowout distribution device to a mode for blowing air onto window glass; a manual operating device that is provided so as to be manually operable and that manually sets operating states of the air intake switching device, the air cooling device, etc.; storage means for storing the operating state of at least the inside/outside air intake switching device of the inside/outside air intake switching device and the air cooling device that have been manually set; A car air conditioner control device comprising: a control device that operates at least the internal/external air intake switching device according to a stored operating state.