JPS6140595Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention provides a vehicle air conditioner that repeatedly switches between internal air circulation and outside air intake during cooling.
If a passenger forcibly switches the air conditioner to internal air circulation while the air conditioner is operating in cooling mode, even if the air conditioner is stopped and then started again in cooling mode, the air conditioner will automatically switch to internal air circulation. The present invention relates to a vehicle air conditioner that performs air conditioning control.

BACKGROUND ART Conventionally, as this type of vehicle air conditioner, there is a device as shown in FIG. 1, for example, and its operation is as shown in FIG.

In FIG. 1, each sensor including a solar radiation sensor 3, an outside temperature sensor 4, and a vehicle room temperature sensor 5, as well as switches such as an inside air circulation switch 6 and a compressor relay 7, are connected to an intake door control device 20 composed of a microcomputer. Furthermore, the intake door control device 20 is actuated by an operation command signal from the intake door control device 20, and the intake door 8 is operated.
An intake door drive mechanism section comprising an actuator 9 and an indicator 13 for displaying the internal air circulation state is connected.

Here, when power is supplied from the battery 2 to the intake door control device 20 by turning on the accessory switch 1 linked to the ignition switch, program control of the intake door 8 starts, and the program control of the intake door 8 starts as shown in FIG. It operates according to the operation flow.

First, the operation of the refrigerant compressor is determined based on the detection signal from the compressor relay 7, and if the air conditioner is in the heating mode and the compressor is stopped, the intake door drive mechanism is A command signal for introducing outside air is output to the intake door 8, and the actuator 9 drives the intake door 8 so as to close the inside air inlet 11, and outside air is introduced into the vehicle interior from the outside air inlet 12 by the blower 10. . Then, until the inside air circulation switch 6 is turned on, the air conditioning control is performed while the outside air introduction state is maintained.

On the other hand, if the air conditioner is in cooling mode and the compressor is operating, the solar radiation sensor 3, outside temperature sensor 4, An operation command signal for the intake door 8 corresponding to each detection data of the room temperature sensor 5 is output from the intake door control device 20 to the intake door drive mechanism, and the intake door 8 driven by the actuator 9 receives the operation command signal. According to shyness introduction,
The air conditioning control is performed by repeating the outside air introduction state or the inside air circulation state based on the operation control pattern described above until the outside air introduction switching operation is performed and the inside air circulation switch 6 is turned on.

Here, when the air conditioner is operating in the heating mode or the cooling mode as described above, when the inside air circulation switch 6 is turned on, the intake door control device 20 generates an inside air circulation display signal and an inside air introduction command signal. is output, the indicator 13 lights up, the intake door 8 is driven by the actuator 9 so as to close the outside air inlet 12, and the inside air is circulated in the vehicle interior through the inside air inlet 11 by the blower 10. Then, air conditioning control is performed while the inside air circulation state is forcibly maintained until the inside air circulation switch 6 is turned off.

Incidentally, when the inside air circulation switch 6 is turned off, the indicator 13 goes out and the intake door 8 corresponding to the heating mode or the cooling mode is operated again.

By the way, when the above-mentioned air conditioner operates in cooling mode, it automatically repeats the introduction of outside air and circulation of inside air according to a predetermined pattern in order to maintain the optimal air condition in the passenger compartment. When operating in this mode, it automatically maintains the outside air intake state to prevent the windows inside the vehicle from fogging up.
Furthermore, it is advantageous in that the air conditioning can be controlled in a forcedly internal air circulation state by turning on the internal air circulation switch 6 according to the passenger's will.

However, each time the air conditioner is started by turning on the accessory switch 1 linked to the ignition switch, the program control of the intake door control device 20 is initialized, and the operation of the air conditioner is always started from the beginning of the predetermined program. This process follows the same flow, so during particularly hot summer months, when a passenger operates the air conditioner in cooling mode and wants to keep the internal air circulating to increase the cooling effect, the driver operates the air conditioner every time he or she gets into the vehicle and turns on the ignition switch. Force internal air circulation switch 6
There was a problem that the switch operation was troublesome.

The present invention was developed in view of the above, and in a vehicle air conditioner that repeatedly switches between internal air circulation and outside air intake during cooling, the air conditioner cools down every time the ignition switch is turned on during the season when the outside temperature is high. To save you the trouble of operating the forced inside air recirculation switch to improve effectiveness, once you operate the forced inside air circulation switch, even if you turn off the ignition switch, when you turn it on again, if the air conditioner is running, the inside air will be turned off. It is designed to operate by circulation.

Hereinafter, the present invention will be explained based on the drawings.

FIG. 3 is a configuration diagram showing an embodiment of the present invention. First, to explain the configuration, each sensor such as a solar radiation sensor 3, an outside temperature sensor 4, and a vehicle room temperature sensor 5, and switches such as an inside air circulation switch 6 and a compressor relay 7 are connected to an input interface 21 of an intake door control device 20. In addition to the interface 21, the intake door control device 20 further includes a memory 2 consisting of a program memory section that stores execution programs and a data memory section that stores data such as intake door operation control patterns.
2a, a memory 22b that stores the ON operation of the internal air circulation switch 3, a central processing unit 23 that performs arithmetic processing according to the execution program stored in the program memory section of the memory 22a, and an output interface 24. It consists of a computer. Intake door control device 20
The output interface 24 of the intake door 8
and an indicator 1 that lights up when the internal air circulation switch 6 is turned on.
3 is connected. By operating the intake door 8, the air conditioner's inside air inlet 11 and outside air inlet 12 are opened.
are opened alternately, and inside air or outside air from the opened inside air inlet 11 or outside air inlet 12 is introduced into the vehicle interior by the blower 10.

Further, when the accessory switch 1 is turned on, power from the battery 2 is supplied to the intake door control device 20.

Although not shown, the data memory section of the memory 22a that stores the intake door operation control pattern and the memory 22b that stores the internal air circulation switch operation retain their stored contents even when the accessory switch 1 is turned off. For example, a backup power source is connected to a separate system.

Next, the operation will be explained with reference to the operation flow diagram shown in FIG.

First, set accessory switch 1 on block 200.
When power is supplied to the air conditioner by turning on the air conditioner, the process proceeds to a determination block 201, where a signal from the compressor relay 7 is input, and the operating state of the compressor is determined. Here the air conditioner operates in heating mode,
If the compressor is stopped, judgment block 2
02, it is determined whether the ON operation of the internal air circulation switch 6 is stored in the memory 22b. If it is not stored, the process goes to block 204, where the intake door controller 20 sends the intake door to the actuator 9 via the output interface 24. 8 outputs an operation command signal for closing the inside air inlet 11. Then, when the intake door 8 driven by the actuator 9 closes the inside air inlet 11, outside air is introduced into the vehicle from the outside air inlet 12 by the blower 10, and air conditioning control is performed. The air conditioning control continues with the outside air being introduced until it is determined that the inside air circulation switch 6 has been turned on. If the occupant turns on the inside air circulation switch 6 while the air conditioning control is continuing in the outside air introduction state, the process advances from decision block 207 to block 208, and the turning on operation of the inside air circulation switch 6 is stored in the memory 22b. This memory may be stored, for example, by setting a predetermined bit in the memory to "0" in response to the ON operation of the internal air circulation switch 6.
to "1". Next, in block 209, indicator 1 indicating the internal air circulation state is selected.
3 is lit and the process proceeds to block 210, where the intake door control device 20 outputs an operation command signal to the actuator 9 via the output interface 24 for the intake door 8 to close the outside air inlet 12, and the actuator 9 The driven intake door 8 closes the outside air inlet 12, and the blower 10 circulates inside air through the inside air inlet 11 in the passenger compartment until the determination block 211 determines that the inside air circulation switch 6 has been turned off. air conditioning control continues. When the air conditioning is being controlled in this internal air circulation state, when the occupant gets out of the vehicle, the air conditioning system is stopped, the accessory switch 1 linked to the ignition switch is turned off, and then the occupant gets back into the vehicle and turns on the accessory switch 1. When the air conditioner is operated, the program control starts again from block 200 and goes to decision block 20.
1, the flow advances to a determination block 202, where it is determined that the ON operation of the internal air circulation switch 6 is stored in the memory 22b, and the flow advances to block 203, where the memory 22b is stored.
After clearing the memory contents, the program proceeds to block 204, where air conditioning control is performed in the same outside air introduction state as described above.

On the other hand, when the air conditioner is operating in the cooling mode and the judgment block 201 determines that the compressor is operating based on the signal from the compressor relay 7, the process proceeds to a judgment block 205, and the memory 22b stores the ON operation of the internal air circulation switch 6. If it is not stored, the process advances to block 206, where an operation command signal is output from the intake door control device 20 in accordance with the operation control pattern stored in the data memory section of the memory 22a, and the intake door 8 is closed to the inside air. The automatic switching operation between intake and outside air introduction is performed, and then the process proceeds to block 207, where the inside air circulation state and outside air introduction state are automatically switched according to the operation control pattern described above until it is determined that the inside air circulation switch 6 has been turned on. air conditioning control continues. On the other hand, if cooling was forcibly performed in the inside air circulation state by turning on the inside air circulation switch 6 before operating in this cooling mode, the turning on operation is stored in the memory 22b, so the determination block The process proceeds from block 205 to block 209, where the indicator 13 indicating the internal air circulation state is turned on, and the process proceeds to block 210, where the actuator 9 switches the intake door 8 to the internal air circulation state based on the actuation command signal from the intake door control device 20. The air conditioner forcibly performs air conditioning control in the inside air circulation state until it is determined in the judgment block 211 that the inside air circulation switch 6 is turned off.

In both the heating mode and the cooling mode, when it is determined in the judgment block 211 that the inside air circulation switch 6 has been turned off, the process proceeds to block 212, where the indicator 13 indicating the inside air circulation state is turned off, and in the block 213, it is stored in the memory 22b. After clearing the ON operation data of the inside air circulation switch 6, the intake door 8 corresponding to each of the heating mode and cooling mode is operated.

As described above, in this embodiment, the ON operation of the internal air circulation switch 6 is stored in the memory 22b while the air conditioner is operating in the cooling mode or the heating mode, and when the air conditioner is turned on again in the cooling mode after the air conditioner is stopped,
According to the data stored in the memory 22b, the air conditioner is forcibly put into the internal air circulation state, and when the heating mode is turned on again, the memory 22b is automatically turned on to prevent the windows inside the vehicle from fogging, which occurs in the internal air circulation state. 2
The stored data of 2b is cleared and air conditioning control is performed in a predetermined operating state in which outside air is introduced. In addition, if it is desired to cancel the internal air circulation operation during cooling after the ignition is turned on, by turning off the internal air circulation switch 6, the internal air circulation can be canceled and the normal automatic switching between internal and external air can be resumed.

As explained above, according to the present invention, in a vehicle air conditioner whose configuration automatically switches between internal air circulation and outside air intake according to predetermined control conditions, when the air conditioner is operating in cooling mode, When a passenger forcibly switches the internal air circulation mode, that operation is memorized, and when the air conditioner is stopped and then the cooling mode is started again, the system automatically switches to the internal air circulation mode according to the memory. This eliminates the need to operate a switch when restarting the air conditioner in the cooling mode to force the internal air circulation state, resulting in the realization of a more effective vehicle air conditioner.

[Brief explanation of drawings]

Fig. 1 is a configuration diagram showing an example of a conventional air conditioner, Fig. 2 is an operation flow diagram showing the operation of the conventional air conditioner shown in Fig. 1, and Fig. 3 is a configuration showing an example of the present invention. 4 are operational flowcharts showing the operation of one embodiment of the present invention shown in FIG. 3. 1...Accessory switch, 2...Battery, 3...Solar radiation sensor, 4...Outside temperature sensor, 5
...Car room temperature sensor, 6...Inside air circulation switch, 7
... Compressor relay, 8 ... Intake door, 9 ... Actuator, 10 ... Blower, 1
1... Inside air inlet, 12... Outside air inlet, 13...
... indicator, 20 ... intake door control device, 21 ... input interface, 22a ... memory, 22b ... internal air circulation switch operation memory,
23...Central processing unit, 24...Output interface.

Claims (1)

[Scope of utility model registration request] In a device that repeatedly switches between inside air circulation and outside air intake during cooling, there is a memory means for remembering that the forced inside air circulation switch was activated during cooling operation, and when the ignition switch is turned on again after being turned off. . A vehicle air conditioner comprising: command means for instructing switching to an inside air circulation state based on the memory in the storage means when the air conditioner is in the cooling operating state.