JPH0379202B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a vehicle air conditioner that automatically controls the interior temperature of a vehicle to a target temperature.

[Prior Art] This type of air conditioner is equipped with a temperature setting device that sets a target temperature inside the vehicle, and automatically controls the temperature inside the vehicle so that it reaches the target temperature set by the temperature setting device. The temperature setting device in this case is generally capable of setting the target temperature regardless of the operating position of the blower switch.

Therefore, if the target temperature changes significantly without the occupants noticing while the blower is stopped, the next time they start the blower, the temperature adjustment may be completely different from what the occupants expected. However, there is a problem in that the air conditioning feeling is deteriorated. To solve this problem, a technique has been proposed in which the target temperature cannot be changed when the blower switch is in the OFF state (Japanese Patent Publication No. 58927/1983).

[Problems to be Solved by the Invention] By the way, when the vehicle is actually running, there is a running wind even if the blower is stopped, so air conditioning can be performed using this wind. However, in the device disclosed in the above-mentioned publication, the target temperature cannot be changed when the blower switch is in the OFF state, so there is a problem in that the desired air conditioning control cannot be performed during that time.

In view of the above circumstances, the present invention enables air conditioning control using running wind even when the blower is stopped, and when the blower is restarted next time, the target temperature is automatically set to the value immediately before the blower was stopped last time. It is an object of the present invention to provide a vehicle air conditioner that does the following.

[Means for Solving the Problems] As shown in FIG. 1, the air conditioner of the present invention includes a vehicle interior temperature sensor 1 that detects the interior temperature of the vehicle, an air blower 2 that blows air into the vehicle interior, and a system that controls the starting and stopping of the air blower 2. a temperature setting device 4 that can set a target temperature inside the car regardless of the operating position of the blower switch 3; and a temperature adjustment device 5 that adjusts the temperature of the air blown into the car by the blower 2.
and a control device 6 for controlling the amount of adjustment of the temperature adjustment device 5 so that the temperature inside the vehicle detected by the temperature sensor 1 becomes the target temperature set by the temperature setting device 4. storage means 7 for storing the target temperature immediately before the operation when the blower switch 3 is switched from the on position to the off position; The present invention is characterized in that a resetting means 8 is provided for resetting the value stored in the storage means 7 as a new target temperature.

[Function] In the device configured as described above, the target temperature can be freely changed even when the blower is stopped, and thereby the vehicle interior air conditioning can be controlled using the running wind. Further, when the blower is restarted, the target temperature is automatically set to the value immediately before the blower was stopped last time. Therefore, even if the target temperature has changed significantly when the blower is stopped, it will be returned to the target temperature suitable for forced air blowing when the blower is restarted.

[Example] Hereinafter, an example of the present invention will be described with reference to FIGS. 2 to 5.

FIG. 2 is a block diagram showing the basic configuration of the control system of the air conditioner according to the embodiment. In this device, a microcomputer 10 constitutes the above-mentioned control device 6, storage means 7, and resetting means 8.

The microcomputer 10 includes a vehicle interior temperature sensor 1 that detects the temperature inside the vehicle, an outside temperature sensor 11 that detects the temperature of the outside air, a solar radiation sensor 12 that detects the amount of solar radiation, and a temperature sensor that detects the temperature of the cold air downstream of the evaporator. Duct sensor 13, cooling temperature sensor 1 that detects the temperature of cooling water flowing to the heater
4. Each detection signal is input via the multiplexer 16 and the A/D converter 17 from the potentiometer 15 which detects the opening degree of the mix door which determines the mixing ratio of cold air and hot air. In addition to this, operation signals or command signals from the compressor switch 18, blower switch 3, and temperature setting device 4 are input.

The microcomputer 10 controls the intake door actuator 2 based on each of the above input signals.
1, Blower 2, Mix door actuator 2
2. Supplying control signals to each drive circuit 25 to 29 of the compressor 23 and mode door actuator 24. In this air conditioning device, the temperature conditioning device mainly includes a cooling system including a compressor, a heating system including a heater, and a mix door that determines the mixing ratio of cold air and hot air.

Figure 3 shows the operation panel. As shown in this figure, the operation panel 20 is provided with the compressor switch 18, a blower switch 3, and a temperature setting device (switch) 4. The blower switch 3 includes an OFF switch 3A, an auto (AUTO) switch 3B, also as a manual switch low (LO) switch 3C, high (HI)
A switch 3D is provided. Further, as the temperature setting device 4, an up (UP) switch 4A and a down (DOWN) switch 4B are provided.
The blower switch 3 is turned off when the off switch 3A is operated, and turned on when any other switch is operated.

Next, we will describe the operation along with the flow of control.

The microcomputer 10 executes the main routine shown in FIG. The main routine consists of several subroutines, and the subroutines calculate a total signal T necessary for air conditioning control.
In the subroutine, control element TF values necessary for mode door control are calculated. Based on the above calculated values, mix door control is performed in the subroutine, blower control is performed in the subroutine, mode door control is performed in the subroutine, intake door control is performed in the subroutine, compressor control is performed in the subroutine, and display control is performed in the subroutine.

The subject matter of the present invention is the subroutine, the details of which will be described below with reference to FIG.

In this routine, first, in steps 10 to 30, detection signals are acquired from the vehicle interior temperature sensor 1, the outside temperature sensor 11, and the solar radiation sensor 12.
Remember as Tr, Ta, Ts.

Next, in step 40, it is determined whether the blower switch 3 is in the off position. If YES, proceed to step 70; if NO, proceed to step 50.
In step 50, it is determined whether the compressor switch 18 is in the on mode. If YES, the predetermined value α is stored as the duct internal temperature Tduct (step 60), and the process proceeds to step 80. If NO, proceed to step 70. In step 70, the detected temperature from the duct sensor 13 is stored as Tduct, and then the process proceeds to step 80.

Next, in step 80, the blower switch (FAN
SW) 3 is in the OFF position (OFF switch 3A was operated). If YES, proceed to step 90, store the target temperature Td immediately before turning the blower switch 3 to the OFF position in the A register, and
At step 100, a flag (FLAG) 1 for determining that an off operation has been performed is set to "1". If the determination in step 80 is NO, the operation to store the target temperature in the A register is not performed and the process proceeds to step 110.
Proceed to.

In step 110, it is determined whether the AUTO switch 3B of the blower switch 3 has been operated, and if YES, the process proceeds to step 130. If NO, the process proceeds to step 1200, where it is determined whether the manual switch of the blower switch 3, that is, the LO switch 3C or the HI switch 3D, has been operated. If YES, proceed to step 130. If NO, proceed directly to step 160.

In step 130, it is determined whether flag 1 is "1" or not, that is, after blower switch 3 is operated to the OFF position.
It is determined whether this is the first on operation. If flag 1 = “1”, that is, if YES, flag 1
is set to "0" (step 140), and the value of register A, which stores the target temperature immediately before turning off the blower switch 3, is reset as a new target temperature Td (step 150). And the steps
Proceed to 160.

In step 160, it is determined whether both the up switch 4A and down switch 4B of the temperature setting device 4 have been operated, and if YES, the operation is invalidated as an error and the process proceeds to step 230.

If NO, go to step 170 and turn on switch 4.
It is determined whether or not A has been operated. step 170
If the determination is NO, proceed to step 200. YES
In this case, it is determined in step 180 whether the target temperature Td=32.0 (maximum value), and if YES (Td=32.0), the target temperature is the maximum, so Td is not changed and the process proceeds to step 230. If NO, proceed to step 190
Increase Td by 0.5 and proceed to step 230.

Steps 200 to 220 are processing steps corresponding to the operation of the down switch 4B, and in step 200 it is determined whether the down switch 4B has been operated. If the judgment of step 200 is NO, step
Proceed to 230. If YES, it is determined in step 210 whether the target temperature Td = 18.0 (minimum value), and YES is determined.
If (Td=18.0), the target temperature is the lowest, so Td is not changed and the process proceeds to step 230. If NO, proceed to step 220, reduce Td by 0.5, and step 230
Proceed to.

Then, in step 230, a comprehensive signal T is calculated based on the vehicle interior temperature Tr, outside air temperature Ta, solar radiation temperature Ts, and duct interior temperature Tduct, and the next subroutine is executed.
Let's move on to SUB processing.

As understood from the above process flow, the target temperature can be changed even when the blower switch 3 is in the OFF position. Also, when restarting,
The target temperature will be reset to the previous target temperature when the power was turned off last time.

[Effects of the Invention] As described above, according to the air conditioner of the present invention, the target temperature can be freely changed even when the blower is stopped, and air conditioning control using running wind is possible. In addition, when a stopped blower is restarted, the target temperature is automatically set to the value immediately before the last time the blower was stopped, so even if the target temperature has changed significantly when the blower was stopped, the forced air flow will be resumed when the blower is restarted. The temperature is returned to the appropriate target temperature, and deterioration of the air conditioning feeling is prevented.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the configuration of an air conditioner according to the present invention, FIGS. 2 to 5 are explanatory diagrams of an embodiment of the present invention, and FIG. 2 is a block diagram showing the control system of the air conditioner. 3 is a schematic diagram of the operation panel, FIG. 4 is a flowchart showing the main routine of processing performed by the microcomputer, and FIG. 5 is a flowchart showing the contents of the subroutine (SUB) directly related to the present invention. It is. 1...In-vehicle temperature sensor, 2...Blower, 3...
Blower switch, 4...Temperature setting device, 5...Temperature adjustment device, 6...Control device, 7...Storage means, 8
...Resetting means.

Claims (1)

[Scope of Claims] 1. An interior temperature sensor that detects the interior temperature of the vehicle, a blower that blows air into the interior of the vehicle, a blower switch that commands the start and stop of the blower, and a target temperature inside the vehicle that is set regardless of the operating position of the blower switch. a temperature setting device that can adjust the temperature of the air blown into the car by the blower, and a temperature control device that adjusts the temperature of the air blown into the car by the blower, and a temperature control device that adjusts the temperature of the inside of the car detected by the temperature sensor inside the car to reach the target temperature set by the temperature setting device. In a vehicle air conditioner comprising a control device for controlling the adjustment amount of the temperature adjustment device, when the blower switch is operated from an on position to an off position, means for storing a target temperature immediately before the operation; A vehicle characterized by comprising: resetting means for resetting the value stored in the storage means as a new target temperature when the blower switch, which is in the OFF position due to the above operation, is next operated to the ON position. Air conditioner.