JPH0299420A - Air-conditioner for vehicle - Google Patents

Abstract

PURPOSE:To prevent an air-conditioning feeling from being deteriorated, by making it possible to freely vary a desired temperature even while a blower is stopped, and also to automatically set a desired temperature, at the restart of the blower, to the value set just before the last stoppage of the blower. CONSTITUTION:An air conditioner has a vehicle-room temperature sensor 1 for detecting temperature in the room of a vehicle, a blower 2 for blowing 2 for blowing air into the room, a blower switch 3 for ordering start and stoppage of the blower 2, a temperature setting device 4 for setting a desired temperature in the room regardless of the operating position of the blower switch 3, and a temperature controller 5 for controlling the temperature of the air blowed into the room by the blower 2. A controller 6 controls the amount of control by the temperature controller 5 so that the vehicle-room temperature detected by the temperature sensor 1 becomes its desired value set by the temperature setting device 4. In this case, memorizing means 7 is provided for memorizing a desired temperature set just before shifting operation of the blower switch 3 from its on-position to off-position. When the blower switch 3, which is then located in its off-position by the above operation, is operated so that it is shifted to its on-position, resetting means 8 resets the value memorized by the memorizing means 7 as a new desired temperature.

Description

DETAILED DESCRIPTION OF THE INVENTION 1. Field of Industrial Application 1. The present invention relates to an air conditioner for a single vehicle that automatically controls the temperature inside a vehicle to a target temperature. 6E Prior Art 1 This type of air conditioner is applicable to a vehicle interior. It is equipped with a temperature setting device to set a target temperature, and automatically controls the temperature inside the vehicle to reach the target temperature set by the temperature setting device. In this case, the temperature setting device is generally configured to set a target temperature regardless of the operating position of the blower switch.

Therefore, if the blower is stopped and the target temperature changes significantly without the mussels noticing, the next time the blower is started, the temperature will be adjusted completely differently than the crew expected. There is a problem that the air conditioning feeling deteriorates. 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. 62-58927).

[Problems to be Solved by the Invention] Incidentally, during actual running, even if the blower is stopped, there is still a running wind, and it is possible to fly in the air using this. However, in the device disclosed in the above publication, the target temperature cannot be changed unless 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 two circumstances (1), 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 can be set to the value immediately before the blower was stopped last time. The purpose of the present invention is to provide a dual-use air conditioner that automatically sets the air conditioner.

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

[Operation 1] In the device configured as described above, the target temperature can be freely changed even when the blower is stopped, thereby making it possible to perform in-vehicle air conditioning control 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.

[Embodiment 1] Hereinafter, an embodiment 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 reset 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. A cooling water temperature sensor 14 detects the temperature of cooling water flowing to the heater, a potentiometer 15 detects the opening of the mix door that determines the mixing ratio of cold air and hot air, a multiplexer 16, and A/D conversion. Each detection signal is inputted via the device 17. 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 operates the intake door actuator 21, the air blower 1! based on each of the above input signals. '1
2, mix door actuator 22, compressor 2
3. Each drive circuit 25 of the mode door actuator 24
A control signal is supplied to 29.

In this air conditioner, a cooling system including a compressor, an I11 chamber system including a heater, and a mix door that determines the mixing ratio of cold air and hot air mainly constitute a temperature control device.

Figure 3 shows the operation panel. As shown in this figure, the compressor switch 18, blower switch 3, and temperature setting device (switch) 4 are arranged on the operation panel 20.
47+3A, t-) (AUTO) switch 3B, and low (LO) switch 3C as a manual switch.
A high (HI) switch 3D is provided. Further, as the temperature setting device 4, an up (UP) switch 4A and a down (DOWN) switch 4B are provided.

Note that 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 control flow.

The microcomputer 10 executes the main routine shown in FIG. The main routine consists of several subroutines, and subroutine I calculates a total signal T necessary for air conditioning control.

In subroutine (2), control element TF values necessary for mode door control are calculated. Then, based on the above calculated value, mix door control is performed in subroutine ■.
The blower is controlled in subroutine V, the mode door is controlled in subroutine V, the intake door is controlled in subroutine ■, the compressor is controlled in subroutine ■, and the display is controlled in subroutine ■.

The problem in the present invention is subroutine I.

The details will be described below based on FIG.

In this routine, first, in steps 10 to 30,
Vehicle interior temperature sensor 1, outside temperature sensor 11, solar radiation sensor 1
Tr, Ta%T, respectively.
Store it as s.

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, set the predetermined value α to the duct internal temperature Td.
uct (step 60), and step 8
Go to 0. If NO, proceed to step 70. In step 70, the temperature detected by the duct sensor 13 is Tduct.
, and then proceed to step 8o.

Next, in step 80, turn on the blower switch (FANSW).
3 is in the OFF position (OFF switch 3A was operated)
It is determined whether or not. If YES, proceed to step 90;
The target temperature Td immediately before the blower switch 3 is turned off is stored in the A register, and in step 100, 7lag (FLAG) 1 is set to "1" for determining that the blower switch 3 is turned off. If the determination in step 80 is No, the process proceeds to step 110 without performing the operation of storing the target temperature in the A register.

In step 110, it is determined whether or not the AUTO switch 3B of the blower switch 3 has been operated. If YES, the process proceeds to step 130; if NO, the process proceeds to step 1200, and the MANUAL switch of the blower switch 3, that is, the LO switch. 3C or HI switch 3D
Determine whether or not has been operated. If YES, proceed to step 130. If No, proceed directly to step 160.

In step 130, it is determined whether the 7lag 1 is '1' or not, that is, whether this is the first on operation after the blower switch 3 is operated to the off position.If flag 1 is '1',
In other words, if YES, set 7lag 1 to O'' (Step 140), store the target temperature immediately before turning off the blower switch 3, and reset the value of the A register as the new target temperature Td ( step 150).Then, the process proceeds to step 160.

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

If No, it is determined in step 170 whether or not the up switch 4A has been operated. The determination in step 170 is N.
If o, proceed to step 200.

If YES, the target temperature Td=32 in step 180.
．． 0 (highest value) and YES (Td=3
2.0), Td is not changed because the target temperature is maximum,
Proceed to step 230. If No, the process proceeds to step 190 and Td is increased by 0.5, and the process proceeds 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 determination in step 200 is No, the process advances to step 230. Y
In the case of ES, step 210 sets the target temperature Td=18.
Determine f1 whether it is 0 (minimum value) and YES (T, (=18
．． 0), the process proceeds to step 230 without changing Td because the target temperature is the lowest. If No, the process proceeds to step 220, where Td is decreased by 5, and the process proceeds to step 230.

Then, in step 230, the vehicle interior temperature Tr, the outside temperature T
a, a total signal T is calculated based on the solar radiation temperature Ts and the duct internal temperature Tduct, and the process moves to the next subroutine 5UBII.

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 of the island immediately before the previous off operation is set again.

[Effect 1 of the Invention As explained above, according to the air conditioner of the present invention,
Even when the air blower is stopped, the target temperature can be changed freely, making it possible to control the air conditioning using the 8-travel air.

In addition, when a stopped blower is restarted, the target temperature is automatically set to the value immediately before the blower was stopped, so even if the target temperature has changed significantly when the blower is stopped, forced air will be blown when the blower is restarted. The temperature is returned to a target temperature that is suitable for the air conditioner, and the deterioration of the air conditioning feeling is prevented.

[Brief explanation of the drawing]

Fig. 1 is a block diagram showing the configuration of an air conditioner according to the present invention, and Figs. 2 to 5 are explanatory diagrams of an embodiment of the present invention.
, Figure 2 is a block diagram showing the control system of the air conditioner,
FIG. 3 is a schematic diagram of the operation panel, FIG. 4 is a 70-chart showing the main routine of processing performed by the microcomputer, and FIG. 5 is a subroutine (SO
12 is a flowchart showing the contents of Bl). 1...In-vehicle temperature sensor, 2...Blower, 3...Blower switch, 4...Temperature setting device, 5...Temperature control Muscle apparatus, 6...
Control device, 7... Storage means, 8... Resetting means.

Claims (1)

[Scope of Claims] A vehicle interior temperature sensor that detects the interior temperature of the vehicle, a blower that blows air into the vehicle interior, a blower switch that commands the start and stop of the blower, and a target temperature inside the vehicle that can be set regardless of the operating position of the blower switch. a temperature setting device, a temperature adjustment device that adjusts the temperature of the air blown into the car by the blower, and a temperature control device that adjusts the temperature inside the car detected by the temperature sensor to reach the target temperature set in the temperature setting device. In a dual-use air conditioner having 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, a means for storing a target temperature immediately before the operation;
and 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.