JPS6268109A - Air conditioner for vehicle - Google Patents

Abstract

PURPOSE:To make it possible in an air conditioner provided with multiple selection switches for instructing operation modes to switch to a desired mode even if any one of the selection switches is stuck to the on condition due to malfunction by providing multiple decision means. CONSTITUTION:An air conditioner 1 is provided, at its operation section 3 for instructing operation mode switching of the main body 2 of the air conditioner, with a fan operation switch 4 and a switch unit 5 and others having multiple selection switches 51 through 58 for instructing operation mode switching of the main body 2. Here are provided a first decision unit 6 for discriminating switches that are on among the selection switches 51 through 58 and a second decision unit 7 for discriminating the switch that has been lastly turned on among the selection switches 51 through 58. It is made that the output of the first decision unit 6 is selected when the operation switch 4 is operated and that the output of the second decision unit 7 is selected when any one of the selection switches is operated respectively by means of a selection means 8.

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to a vehicle air conditioner.

(Prior Art) Electronic lock type or mechanical exclusive type switches are widely used as operating switches for conventional vehicle air conditioners. When operated, only that selection button is mechanically or electronically locked in the on state, and the other selection buttons are turned off.

(Problem to be Solved by the Invention) Therefore, in an air conditioner using this type of switch, if a malfunction occurs in which one selection button is stuck in the on state, the other There is a problem that if the selection button cannot be operated, the function of the device will be paralyzed.

Therefore, an object of the present invention is to operate the air conditioner by using other non-faulty switches even if the operation switch is malfunctioning and it is no longer possible to control the operation of the air conditioner by operating the switch. An object of the present invention is to provide a vehicle air conditioner that can be controlled according to desired conditions.

(Means for Solving the Problems) The configuration of the present invention for achieving the above object includes an air conditioner body, a plurality of selection switches for instructing the operation mode of the air conditioner body, and an air conditioner body. an operation switch provided in connection with a required operation of the device main body; a first discriminating means for discriminating a selection switch that is in an on state in response to actuation of the plurality of selection switches; a second determining means for determining which selection switch was operated last in response to the operation; and a first determining means when the operating switch is operated in response to the operation of the operating switch and the plurality of selection switches. selection means for selecting an output from the second determining means when one of the plurality of selection switches is operated, the selection means for selecting the output from the second discrimination means, at least the operation of the operation switch and the selection means; It is characterized in that the operation of the air conditioner main body is controlled in response to the output from the air conditioner.

(Function) If none of the selection switches are locked in the on state, there is no output from the first discrimination means, and on the other hand, the second
The determining means determines which selection switch was operated last among the plurality of selection switches, and outputs the determination result. In this state, the selection means selects the output from the second discrimination section by operating the selection switch), and the air conditioner main body is selected by the output from the second discrimination section. Operated in working mode.

If a failure occurs in which one of the selection switches is locked in the ON state, the second determination means, which has only the function of determining the selection switch operated most recently, will detect whether the locked selection switch It becomes impossible to switch to the operating mode that should be selected. Therefore,
When the selection means selects the output from the first discrimination means by operating the operation switch, the selection means:
The output from the first determining means that determines which selection switch is kept on due to the locked state is selected. As a result, when the operation switch is operated, an output indicating the selection switch that is currently kept on is given to the air conditioner body instead of the output indicating the selection switch operated most recently, and this locks the air conditioner. This can be done by switching to the operating mode indicated by the closed selection switch.

(Embodiment) FIG. 1 shows a block diagram of an embodiment of a vehicle air conditioner according to the present invention. The vehicular air conditioner 1 includes an air conditioner main body 2 and an operation section 3 for instructing switching of the operating mode of the air conditioner main body 2. The operation unit 3 includes an operation switch 4 for turning on/off a fan (not shown) provided in the air conditioner main body 2, and an operation switch 4 for instructing switching of the operation mode of the air conditioner main body 2. The selection switches 5 to 58 are connected to the '1st and N2 discrimination sections 6' and 7, respectively.

Here, the selection switches 5 to 51 are switches that are turned on only when they are pressed.

The first discrimination unit 6 discriminates which selection switch is in the on state among the selection switches 51 to 5s, and first discrimination output 0. is from the first discrimination section 6 to the selection section 8
has been entered. The second determination unit 7 includes a selection switch 51
The switch unit 5 and the second determining section 7 have a function of determining the selection switch operated last in 5 seconds and outputting a second determination output 01 indicating the determination result.
It constitutes a so-called electronic lock switch.

The second discrimination output 0 words is input to the selection section 8.

The selection section 8 includes the operation switch 4 and selection switches 51 to 5.
I, and the selection unit 8 outputs the first discrimination output 0.I in response to the operation switch 4 being switched from the OFF state to the ON state. On the other hand, select switches 51 to 5I
The configuration is such that the second control output 01 is selected in response to any one of the two being operated. The selection output SO from the selection unit 8 is input to the air conditioner main body 2 and
The switching of the operating mode of the air conditioner main body 2 is controlled according to this selection output SOK. The operation switch 4 is also connected to the air conditioner main body 2, and is configured to turn on and off a fan (not shown) in response to the on/off operation of the operation switch 40.

The operation unit 3 is further provided with a power switch 9 for turning the power on and off, an automatic temperature control switch 10, and a temperature setting device 11, each of which is connected to the air conditioner main body 2. has been done.

Next, the operation of the vehicle air conditioner 1 shown in FIG. 1 will be explained. First, let's talk about the case where the operation section 3 is functioning normally. When the switch unit 5 is not operated, all selection switches 51 to 5- are turned off, and the first control output 01 is turned off at any time. On the other hand, the second discrimination output 01 outputs the second discrimination output 02 indicating the selection switch operated most recently. Therefore, in a state where the operation switch 4 is already turned on and the selection switch is operated at least once after that, the selection section 8 outputs the second discrimination output 0. , the second discrimination output 03 is the selection output S
It is supplied to the air conditioner main body 2 as O. Therefore, the air conditioner main body 2 outputs the second discrimination output 0! The vehicle is being operated in a driving mode that follows. In this state, when the required selection switch is pressed to change the operation mode, the second
The determination unit 7 responds to the on-→off change state of the selection switch, and the content of the second determination output 02 is changed to the content indicating the selection switch that has just been pressed.

As a result, the operation mode of the air conditioner main body 2 is changed, and in this way, it is possible to switch to an arbitrary operation mode.

Next, the operation when any one of the selection switches fails and is locked in the on state will be described. As can be seen from the above explanation, in order to change the operation mode, the required selection switch must be turned on and off, but if the required selection switch is locked in the on state, the operation cannot be performed. I can't do it anymore,
Therefore, depending on the electronic lock type switch constituted by the switch unit 5 and the second discriminator 7, it becomes impossible to switch to the operation mode assigned to the faulty selection switch. This problem can be remedied by performing K as follows. That is, since the first determination unit 6 determines which selection switch is in the on state, the operation switch 4 is
When turned on after being turned off, the selection unit 8 selects the first control output 01 indicating the selection switch locked in the on state instead of the first discrimination output 01. , the operating mode of the air conditioner main body 2 is switched to the operating mode assigned to the selection switch locked in the on state. After entering this state, when a necessary selection switch is operated to switch to another operation mode, the second discrimination section 7 discriminates this selection switch, and at the same time, the selection section 8 selects the first discrimination switch. Output 0! The selection section 8 is controlled so that the selection section 8 is selected. Therefore, by specifying another operation mode using the selection switch, it is possible to switch to the specified operation mode.

In this way, even if the selection switch is locked in the on state, the above-mentioned configuration makes it possible to select the operation mode assigned to the selection switch that has been locked in the on state. The operation mode of the harmonizing device can be switched without any hindrance until the selection switch is repaired without causing any hindrance to the operation of the harmonizing device.

FIG. 2 shows another embodiment of the vehicle air conditioner according to the present invention. In the embodiment shown in FIG. 2, each function of the first discrimination section 6, second discrimination section 7, and selection section 8 shown in FIG. They differ in how they are realized.

The vehicle air conditioner 21 shown in FIG.
2 and a control section 23, and an operation section 25.

In the mechanism section 22, C531 is a compressor to which the rotational force from the ennon 32 is transmitted via the magnetic clutch 33 and is driven by K, 34 is a capacitor, and 35 is a duct, which includes an intake door 36 and a pro-air. 37, an evaporator 38, an air mix door 39, a heater core 40, and a mode door 41 are arranged as shown.

The outlet end of the duct 35 opens into the passenger compartment 43 of the vehicle 42, and has a defroster outlet 44, a vent outlet 45, and a foot outlet 46. Since these individual elements and the arrangement of these elements are well known, detailed explanation thereof will be omitted.

On the other hand, the control unit 23 has first to third actuators 51, 52, and 53 for operating the intake door 36, the air mix door 39, and the mode door 41, respectively.
The first to third actuators 51 to 53 operate in response to first to third control signals sl to S3 outputted from the microcomputer 54, respectively.
to 57, respectively. A fourth drive circuit 58 turns on and off the magnetic clutch 33 in response to the fourth control signal S4 from the micro combinator 54;
9 is the fifth control signal Ss from the microcomputer 54
This is a fifth control circuit that turns the proar 37 on and off and rotates at a required speed in response to the above. The air conditioner for a vehicle has an automatic adjustment function that can automatically maintain the temperature inside the vehicle compartment 43 at a desired set temperature. A switch is provided. That is, in order to output the first detection signal Dl indicating the temperature inside the vehicle interior 43, the room temperature sensor 60. A position sensor 61 that outputs a second detection signal D2 that indicates the position of the air mix door 39, a solar radiation sensor 62 that outputs a third detection signal Ds that indicates the intensity of solar radiation, and a fourth detection signal D that indicates the outside temperature.
Outside temperature riser 62 that outputs 4, Eva+7? rater 38
A mode sensor 63 that outputs a fifth detection signal D indicating the temperature of the outlet of the heater core 40 and a water temperature switch 64 outputting a sixth detection signal D indicating that the temperature of the heater core 40 has exceeded a predetermined value are provided. There is. First to fifth detection signals DI
In other words, analog-to-digital (A/D) converter 6
The f4 zotal input data DXN is converted into the f4 zotal input data DXN by the micro combinator 54. When the temperature of the heater core 4° is lower than a predetermined value, the sixth detection signal D6 is set to the “L” level.
A signal that reaches the rHJ level when the r value is equal to or higher than the fixed value is used, and is therefore directly input to the micro combinator 54.

The operation unit 25 is used to provide command information regarding the control of the air conditioner body 24 to the control unit 23, and in addition to the switch unit 5 shown in FIG. The temperature setting device 71 outputs the setting signal AI indicating the setting signal AI, and the signal A! indicating the selection state of either automatic temperature control or manual temperature control. automatic/manual switch 72 that outputs 0N for giving power on and off commands.
It has a power switch 73 that outputs a 10FF signal As, and a proer regulator 74 that outputs a proer control signal A4 for turning on/off the proer 37 and setting its air volume. The switch unit 5 outputs signals Bl corresponding to the eight selection switches 51 to 5s included therein.
B8 to B8 are input to the micro combinator 54.

Here, the operation modes assigned to the selection switches 51 to 5s are as shown in the table below.

Table selection switch 51 Defroster mode
5. Defroster/heater mode tt
5g heat mode〃 54
Pie level mode, 5. Pent mode/I 56 Automatic mode 57 Internal air circulation mode l 5s
Outside air introduction mode Next, digital input data D
IN, sixth detection signal D6 and other input signals A1 to A
4 and B1 to B8, the microconbeater 5
The control program executed in 4 will be explained based on the flowcharts shown in FIGS. 3 and 4.

To explain the flowchart in Figure 3, Stella 7
After initialization is performed in '81, step f82
At this point, the ON state of each of the selection switches 5x to 58 of the switch unit 5 is checked. In this step, it is determined that the switch is in the on state only if it has been on for a predetermined period of time or more. In step 83,
It is determined whether or not there is a selection switch determined to be in the on state, and if the determination result is YES,
Proceeding to step 84, the contents of the memory storing data regarding the selection switch in the OFF state are updated according to the check result in step 82;
Proceed to step 85. Note that if the determination result in step 83 is No, the process directly proceeds to step 85.

In step 85, the operation mode is set according to the operation of the switch of the switch unit 5 in accordance with a predetermined priority order. The setting of this operating mode will be explained in detail later with reference to FIG. 4.

When the operation mode setting in step 85 is completed, the process proceeds to step 86, where the operation of each selection switch of the switch unit 5 is checked.

That is, a check is made to see if any selection switch has been operated to change from an on state to an off state, and if any selection switch has been operated in this way, that selection switch is The data indicated is stored in the memory described above. In this case, data already stored in memory is erased.

In step 87, automatic temperature adjustment control is performed to maintain the temperature inside the vehicle at a set temperature based on other input data and signals. After that, Proa 37
A check is performed in the Stella f8B to see if an operation has been performed in which the operation is turned OFF and then turned ON again.

If such control is not performed, the process returns to step 83 without executing step 82, and steps 83 to 83 are performed.
88 is executed. Therefore, in this case step 82
step 8 because the level input check is not performed.
30 determination result is NO, in step 85,
The operating mode is always switched according to the result checked in step 86.

If one of the selection switches in the switch unit 5 is malfunctioning and is locked in the on state, and you want to switch to the operation mode corresponding to the selection switch that has been locked in the on state, , Blower O
When the FF40N operation is performed, the screen returns to Stella f82, so that it is determined which selection switch is locked in the on state. This determined selection switch.

Since the data related to the above are input into the required memory in step 84, the setting of the operating mode in step 85 is changed to the operating mode corresponding to the selection switch checked in Stella 7682. Thereafter, unless the selection switch in the switch unit 5 is operated, this operation mode will continue. When a non-faulty selection switch is operated in this state, data indicating the selection switch is written in a required memory in Stella 7'86, and switching to a desired operation mode is performed.

Next, the operation mode setting step 85 shown in FIG. 3 will be explained with reference to FIG. 4. First, in step 91, it is determined whether or not the selection switch 51 has been operated by checking the contents of the memory described above.

If the determination result in step 91 is YES, step 9
The program proceeds to Step 2, where control processing for operating in defroster (DEF) mode is performed, and the program proceeds to Stella f86. If the determination result in step 91 is NO, the process advances to step 93, and thereafter, in steps 93 to 99, whether or not the selection switches 5F to 5I have been operated is checked in accordance with the contents of the memory described above. That is, if the determination result in step 93 is YES, the defroster/heater (DF
, F/H) mode (S f 77” 100
), sf 7' 94 (D discrimination result'jL i:
If YES, the mode is switched to the heater (HEAT) mode (Stella 7'l 01), and if the determination result of Stella f95 is YES, the pie level (BI-LEVEL) is switched.
mode (Stella 7”l O2), and if the determination result in step 96 is YES, the pen) (VENT)
mode (step 103). Further, if the determination result in step 97 is YES, the mode is switched to automatic mode (step 104), if the Stellar f980 determination result is YES, it is switched to internal air circulation mode (step 105), and if the determination result in step 99 is YES, the mode is switched to automatic mode (step 104). If so, the mode is switched to outside air introduction mode (step 106). If any of the determination steps from steps 91 to 99 is NQ
If so, the mode is not switched and the process proceeds to step 86.

As can be seen from the above description, the determinations in steps 91 to 99 are performed sequentially from Stella f91, and when a YES determination result is obtained for the first time, the operation mode is switched in accordance with the determination content. If the determination result is YES in any of steps 91 to 99, the subsequent steps are not executed.

As a result, the priority order for determining whether or not each selection switch is operated is determined in the order of steps 91 to 99. If multiple selection switches are locked in the on state, among these selection switches, Switching to the operating mode according to the selection switch whose operation is determined more quickly will be executed preferentially. Therefore, it is desirable to configure the program so that, among the operating modes, the switching of the operating mode with higher priority is performed first.

(Effects) According to the present invention, as described above, since the operating state of the switch for selecting the driving mode can be detected by both edge input and level input, the switch for selecting the driving mode can be detected. Even if the device is stuck in the on state due to a failure, it is possible to switch to the desired operation mode without any inconvenience, and the control function will not be reduced by half.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing one embodiment of the vehicle air conditioner according to the present invention, FIG. 2 is a block diagram showing another embodiment of the vehicle air conditioner according to the present invention, and FIGS. 3 and 4 3 is a flowchart showing a control program executed by the microconbeater shown in FIG. 2. FIG. 1.21...Vehicle air conditioner, 2.24...Air conditioner main body, 3, 25...Operation unit, 4...Operation switch, 5...Switch unit, 51 to 5・
...Selection switch, 6...First discrimination section, 7...Second
Discrimination part. 8...Selection section. Patent applicant: Diesel Kiki Co., Ltd. Agent: Patent attorney: Masatoshi Takano Diagram 1 Blindness

Claims (1)

[Claims] 1. An air conditioner main body, a plurality of selection switches for instructing the operation mode of the air conditioner main body, an operation switch provided in connection with a required operation of the air conditioner main body, and one of the plurality of selection switches. a first determining means for determining which selection switch is in an on state in response to an operation; a second determining means for determining a selection switch that was operated most recently in response to the operation of the plurality of selection switches; In response to the operation of the operation switch and the plurality of selection switches, when the operation switch is operated, the output from the first discrimination means is selected, and when any of the plurality of selection switches is operated, the output from the first discrimination means is selected. selection means for selecting the output from the second determination means, and the operation of the air conditioner main body is controlled in response to at least the operation of the operation switch and the output from the selection means. Vehicle air conditioner.