JPH086576Y2 - Air conditioning control system for automobiles - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention is capable of dehumidifying and cooling the interior of a vehicle according to the operation of a vehicle air-conditioning control device, particularly a wiper, to remove the fogging of the windshield. The present invention relates to an air conditioning control device.

[Prior Art] Conventionally, as an air conditioning control device for an automobile, when the windshield is easily fogged, such as during rain, the air conditioning device is operated in conjunction with the ON operation of the wiper to dehumidify the vehicle interior. It is generally well-known that the windshield is designed to be clouded.

For example, in Japanese Utility Model Laid-Open No. 58-44214, an air conditioning compressor, clutch means for connecting or disconnecting transmission of power to the compressor, an evaporator in which a refrigerant from the compressor circulates, and an operating state of a wiper are detected. And a wiper operating state detecting means for controlling the operation of the wiper when the wiper is turned on so that the clutch means is connected to turn on the compressor, that is, the air conditioner is cooled.

[Problems to be solved by the invention] However, in the above-described conventional air conditioning control device, the transmission of power to the compressor is turned on / off according to the operating state of the wiper, for example, the ON / OFF state of the wiper motor.
For example, in order to remove dirt on the windshield, the washer fluid is ejected and the wiper motor is turned on only during this ejection period (wiper period operation (MIST)). Will be cooled. In addition, during intermittent wiper operation (INT) in which power to the wiper motor is repeatedly turned on and off, the cooling operation of the air conditioner is turned on / off according to the current state of the wiper motor.
This is repeated, which causes a strange feeling to the occupant and causes a decrease in the life of the clutch means.

The present invention has been made in view of the above problems, and suppresses the cooling operation at the time of the MIST and prevents the ON / OFF of the air conditioner from being repeatedly turned on at the time of INT, and the interior of the vehicle according to the operation of the wiper. An object of the present invention is to provide an air conditioning control device for an automobile capable of dehumidifying and cooling the air.

[Means for Solving the Problem] Therefore, the present invention relates to an automobile including a cooling means for dehumidifying and cooling the interior of the vehicle and a wiper operation detecting means for detecting an operation state of the wiper and outputting a wiper signal. In the air conditioning control device, the first wiper from the wiper operation detection means
The operation of the cooling means is prohibited until the first set period elapses after the ON signal is output, and the wiper ON signal is output within the second set period after the first set period elapses. When the wiper ON signal is interrupted within the second set period, the cooling means is operated until the predetermined time elapses from the time of the interruption. At the same time, when the wiper ON signal is not output within the predetermined time, the operation of the cooling means is stopped, while when the wiper ON signal is output within the predetermined time, the operation of the cooling means is continued. A control means is provided.

[Effect of the Invention] According to the present invention, since the above-mentioned control means is provided, until the predetermined period (first set period) elapses after the wiper operation detection means outputs the first wiper ON signal, The operation of the cooling means is prohibited. Therefore, it is possible to prevent the cooling of the vehicle interior from immediately starting only by turning on the wiper switch, and to suppress the cooling operation during MIST. Further, after the first set period has elapsed, when the wiper ON signal is output within the second set period, the cooling means is operated, so during normal normal high-speed wiper operation in which the wiper motor is energized at all times. Reliably dehumidifies the passenger compartment
Can be air-conditioned. Further, when the wiper ON signal is interrupted within the second set period, the cooling means is operated until a predetermined time elapses from the time of the interruption, and the wiper ON is restarted within the predetermined time. When the signal is output, the operation is continued. Therefore, by appropriately setting the above-mentioned predetermined time, the air conditioner can be continuously cooled without repeating ON / OFF even at the time of INT in which energization / interruption of the wiper motor is repeated.

As a result, while suppressing the cooling operation during MIST and preventing repeated ON / OFF during INT, it is possible to dehumidify and cool the passenger compartment according to the operating state of the wiper, which gives the occupant a sense of discomfort. Without exerting any influence, and without causing a reduction in the life of the clutch for turning on / off the power transmission to the compressor, the wind glass can be effectively deflated in rainy weather or the like.

[Embodiment] An embodiment of the present invention will be described below in detail with reference to the accompanying drawings.

As shown in FIG. 1, the air conditioner 1 according to the present embodiment is
For example, a compressor 2 connected to an output shaft E _S of the engine E via a power transmission means 8 such as a transmission belt, a condenser 3 arranged at the front end of the engine room, and a constant condenser arranged downstream of the condenser 3. Volume receiver tank 4 and expansion valve 5 arranged downstream of the tank 4 and directly upstream of the evaporator 6 (evaporator).
And a refrigerating cycle constituted by serially connecting the refrigerant and the refrigerant pipe 7 in series, and the evaporator 6 constitutes a main part of a cooling unit 12 for cooling the conditioned air in the air conditioning unit 10.

The gas refrigerant that has been sucked and compressed by the compressor 2 and has a high temperature and high pressure is cooled and condensed by heat exchange with traveling wind in the condenser 3 to become a liquid refrigerant.
The expansion valve 5 via the receiver tank 4
And is adiabatically expanded by being depressurized to a predetermined pressure by the valve 5 and evaporated and vaporized while taking heat of vaporization from the surrounding air in the evaporator 6. The vaporized and gasified refrigerant is sucked into the compressor 2 again, and the same cycle is repeated thereafter.

Between the output shaft E _S of the compressor 2 driven shaft of the engine E, a clutch device 9 for example electromagnetic coupling of both the separably is interposed, said electromagnetically in the driving state of the engine E By connecting (ON) the clutch 9, the compressor 2 is driven while consuming a part of the engine power. The electromagnetic clutch 9 is connected to an air-conditioning control unit 40 mainly composed of, for example, a microcomputer so as to be able to send and receive signals, and an ON (connection) / OFF (disconnection) state is controlled by a command signal from the control unit 40. It has become so.

The air conditioning unit 10 includes, in order from the upstream side, a blower unit 11 that takes in air to be conditioned and sends it into the device 10, a cooling unit 12 that cools conditioned air by the evaporator 6, and a cooling water for the engine E as a heat source. Heater unit that heats the conditioned air by the heater core 22
The heater unit 13 is connected to an air-conditioning duct 14 for supplying air-conditioning air into the passenger compartment, and each terminal of the air-conditioning duct 14 communicates with each vent of the vent 15, the heat 16 or the defroster 17. are doing. In addition, the heater unit 13
Is provided with air mix doors 23, 24 for adjusting the temperature of conditioned air by adjusting the amount of air passing through the heater core 22, and the air conditioning duct 14 is provided with a vent door for switching the blowing mode of conditioned air. 25, a heat door 26, and a defroster door 27 are provided.

The air mix doors 23 and 24 are both connected to an air mix door motor 28, and the vent, heat and defroster mode doors 25, 26 and 27 are both connected to a mode door motor 29. 29
Is the air conditioning control unit for controlling the operation of the air conditioning apparatus 1.
Each of them is connected to 40 so that signals can be exchanged. And
By driving each of the door motors 28, 29 according to a control signal from the air conditioning control unit, each of the doors 23, 24, 25,
The openings of 26 and 27 are adjusted to control the temperature of the conditioned air and the blowing mode.

Further, the blower unit 11 includes the inside / outside air switching damper 32.
The air intake box 31 that switches the intake state of the air between the introduction of the outside air and the circulation of the inside air by opening and closing, the blower fan 34 that takes in the outside air or the inside air through the air intake box 31 and sends the air to the downstream side, By adjusting the opening degree of the switching damper 32 by operating the damper driving motor 33 attached to the inside / outside air switching damper 32, which is composed of the blower motor 35 that rotationally drives the fan 34.
The outside air, the inside air, or a mixture of the both can be taken into the device 10, and the amount of conditioned air can be adjusted by controlling the rotation speed of the blower motor 35.

The air conditioner 1 is, for example, a so-called auto air conditioner having an auto control function and an auto mode function. The air conditioning control unit 40 that performs various controls of the auto air conditioner has an input operation for performing an input operation on the control unit 40. Board 60 is connected. The operation panel 60 is provided with a setting input section 61 for setting the air conditioning state of the air conditioning apparatus 1 to a desired state and a display section 62 for displaying the operating state of the air conditioning apparatus 1. Main switch 63 for turning ON / OFF the operation of device 1, auto switch 64 for automatic operation,
Fan switch 65 for manually setting the air flow rate
A temperature setting switch 66 for setting the temperature inside the vehicle, an inside / outside air changeover switch 67 for manually switching the intake air between the inside air circulation and the outside air introduction, and a mode switch group 68 for manually setting the blowing mode of the conditioned air are provided. There is.

When the main switch 63 is pressed once, the air conditioner 1 is turned on, and the compressor 2 is intermittently operated depending on the required cooling power, that is, the electromagnetic clutch 9 is intermittently connected (ECO mode). ) Is set and the push operation is performed twice, the compressor 2 is continuously operated, that is, the electromagnetic clutch 9 is continuously connected,
The air conditioner mode (A / C mode) is instructed to start cooling, and the operation of the air conditioner 1 is turned off by the third pressing operation. Incidentally, instead of this,
A mode switch for switching the operation mode of the air conditioner 1 between the A / C mode and the ECO mode may be provided separately from the main switch 63. Also, the main switch 63
If the auto switch 64 is turned on while the is on,
The A / C and ECO modes are switched and the air conditioner 1 is turned off automatically according to the environmental conditions.

In the present embodiment, the air conditioning control unit 40 has a wiper 50
Is connected to the wiper switch 46, the wiper switch 46, via the wiper control unit 47,
It is connected to the wiper motor 48 that drives the wiper 50. If the wiper switch 46 is turned on,
The cooling operation is performed according to the operation state of 50.

Although not specifically shown, the wiper switch 46 is used when the wiper 50 is intermittently operated at a relatively low speed such as a MIST switch used for removing dirt on the windshield and a light rain. It is provided with an INT switch and a normal wiper switch used when operating the wiper 50 at a relatively high speed such as during normal rain. When the MIST switch is turned ON (for example, pushed), the wiper motor 48 is turned on only while the ON operation is continued.
Is energized to drive the wiper 50 and the washer fluid is ejected, and the wiper motor is stopped when the ON operation is stopped.
Power to 48 is cut off. When the normal wiper switch is turned on, the wiper motor 48 is continuously energized and the wiper 50 operates at high speed. Further, when the INT switch is turned on, the wiper motor 48 is repeatedly energized / interrupted, and the wiper 50 intermittently operates in response to the repeated energization.

As shown in FIG. 2, the air conditioning control unit 40 turns ON / OFF the compressor 2 via the judgment control section 41 to which the wiper switch 46 and each switch of the input operation panel 60 are connected and the electromagnetic clutch 9. And a compressor control unit 42 for controlling. The wiper motor 48 detects a voltage difference between both ends of the motor 48 and outputs a Hi signal (wiper ON signal) when the voltage difference is equal to or more than a predetermined value (for example, 5 volts). In this case, a wiper operation detecting means 49 for outputting a Lo signal is additionally provided, and the wiper operation detecting means 49 is connected to the determination control section 41.

Further, the judgment control unit 41 includes the wiper operation detecting means.
First to determine that a predetermined setting period T ₁ (first setting period) has elapsed since the wiper ON signal was first input from 49
A timer circuit 43 and a second timer circuit 44 for judging that the second setting period T ₂ has elapsed after the first setting period T ₁ has elapsed.
And are attached.

The determination control unit 41 includes a setting input signal from each switch of the input operation panel 60, an input signal from the wiper switch 46, a wiper operation signal from the wiper operation detecting means 49,
Although not specifically shown, the ON / OFF signal of the ignition switch and the output signal from the engine control unit are input, and further the solar radiation sensor 46 (see FIG. 1) for detecting the solar radiation amount, mainly the evaporator 6 Detection signals are input from various sensors such as an evaporator sensor 47 that detects the temperature, an in-car sensor 48 that detects the temperature inside the vehicle, and an outside air sensor 49 that detects the temperature outside the vehicle.

Air-conditioning control of the air-conditioning control unit 40 configured as described above when the wiper is operated will be described with reference to the flowchart of FIG. 3 and the graphs of FIGS. 4 to 7.

First, the system is started by turning on the wiper switch 46, and it is determined in step # 1 whether the wiper ON signal is output. If the determination result is NO, step # 1 is repeated. The above judgment result is YES
In the case of, that is, when the first wiper ON signal is output, the first timer circuit 43 is turned on in step # 2, and the determination of whether or not the wiper ON signal is output is continued in step # 3, Even when the above signal is output (in the case of YES), it is ignored and the compressor 2 is maintained in the inoperative state (step # 4). And step # 5
Then, it is determined whether or not a predetermined first setting period T ₁ (for example, 1 minute) has elapsed since the first wiper ON signal was output, and when the setting period T ₁ has elapsed, the _first setting period T ₁ The 1-timer circuit 43 is reset (step # 6), and the second timer circuit 44 is turned on in step # 7.

Next, in step # 8, it is determined whether or not the wiper ON signal is output. If the determination result is NO, it is determined in advance that the second timer circuit 44 is turned on in step # 9. It is determined whether the second set period T ₂ (for example, 30 seconds) has elapsed. And if this determination result is YES,
That is, when the wiper ON signal is not output within the second set period T ₂ , the second timer circuit is output in step # 10.
When 44 is reset, the system is returned to the initial state (step # 11).

That is, for example, as shown in FIG. 4, when the MIST switch is pressed only once, the first setting period T ₁ has elapsed after the first wiper ON signal was output, and the second setting period following the first setting period T ₁ has passed. when in T ₂ not output wiper oN signal is not to the air conditioning apparatus 1 is operated cooling. If the determination result in step # 9 is NO, step # 9
8 is repeated.

On the other hand, if the decision result in the step # 8 is YES, a cooling signal is output from the decision control unit 41 to the compressor control unit 42 in the step # 12, the electromagnetic clutch 9 is connected, and the compressor 2 is operated. By being made
Cooling of the passenger compartment is started. Simultaneously with the start of cooling, the second timer circuit 44 is once reset (step # 1).
3). After that, it is continuously determined whether or not the wiper ON signal is output (step # 14),
The cooling operation is continued during YES. That is, for example, as shown in FIG. 6, when it is raining, the wiper 50 operates normally at high speed and the wiper motor 48 is always energized, so that the vehicle interior is continuously dehumidified and cooled.

When the result of the determination in step # 14 is NO, that is, when the output of the wiper ON signal is cut off, the second timer circuit 44 is turned on again in step # 15. It should be noted that, in this step # 15, it is also possible to separately provide another time-limit means having a set time different from that of the second timer circuit 44 and turn on the time-limit means.

Then, it is continuously determined whether or not the wiper ON signal is output (step # 16). If YES, step # 17
Then, the second timer circuit 44 is reset, and cooling of the vehicle interior is continued. That is, for example, as shown in FIG.
Even during INT operation in which energization / interruption of the wiper motor 48 is repeated in a predetermined short cycle, by setting the set time T ₂ of the second timer circuit 44 longer than the Lo output period of the wiper motor 48, ON / OFF The cooling operation can be continued without repeating.

On the other hand, when the result of the determination in step # 16 is NO, it is determined in step # 18 whether or not the predetermined time T ₂ has elapsed since the second timer circuit 44 was turned on. Repeats step # 16. Also, above step # 18
If the result of the determination is YES, that is, if the wiper ON signal is not output within the predetermined time T ₂ after the wiper ON signal is cut off, the cooling operation of the air conditioner 1 is stopped in step # 19. At the same time, the second timer circuit 44 is reset (step # 20), and the system is returned to the initial state. That is, for example, as shown in FIG. 7, when the MIST switch is pushed once and then the second push operation is accidentally performed within the second set period T ₂ , the vehicle interior is temporarily cooled. Although started, the cooling is stopped after a predetermined time T ₂ after the _second pressing operation is finished, and unnecessary cooling operation at the time of MIST is suppressed.

As described above, according to the present embodiment, the unnecessary cooling operation at the time of MIST is suppressed and the ON / OFF repetition is prevented at the time of INT, and the vehicle interior is dehumidified according to the operating state of the wiper 50. The air conditioner can be cooled, and the windshield can be deflated in the rain or the like without giving an occupant a strange feeling and without shortening the life of the electromagnetic clutch 9.

[Brief description of drawings]

The drawings are all for explaining the embodiments of the present invention. FIG. 1 is an overall configuration diagram schematically showing an air conditioning system and its control device for a vehicle, and FIG. 2 is a block configuration diagram of the air conditioning control device. , FIG. 3 is a flow chart for explaining the air conditioning control when the wiper is operated by the air conditioning control device, and FIGS. 4, 5, 6 and 7 are respectively,
MIST operation, INT operation, high speed operation, and repeat twice M
It is a graph which shows a wiper motor signal at the time of IST operation, and a cooling operation state. 1 ... Air conditioner, 2 ... Compressor, 9 ... Electromagnetic clutch,
10 ... Air conditioning unit, 12 ... Cooling unit, 40 ... Air conditioning control unit, 41 ... Judgment control unit, 42 ... Compressor control unit, 43 ... First timer circuit, 44 ... Second timer circuit, 48 ... Wiper motor, 49 ... Wiper operation Detection means, 50 ... Wiper, T ₁
… First setting period, T ₂ … Second setting period.

Claims (1)

[Scope of utility model registration request] 1. An air conditioning control device for an automobile, comprising: a cooling means for dehumidifying and cooling the interior of the vehicle compartment; and a wiper operation detecting means for detecting an operating state of the wiper and outputting a wiper signal. The operation of the cooling means is prohibited until the first set period elapses after the first wiper ON signal is output, and the wiper is turned on within the second set period after the first set period elapses. When the signal is output, the cooling means is operated, and when the wiper ON signal is interrupted within the second set period, the cooling means is operated from the time of the interruption until a predetermined time elapses. While operating the, while the operation of the cooling means is stopped when the wiper ON signal is not output within the predetermined time, while the wiper ON signal is output within the predetermined time, the cooling means Air conditioning control device of a motor vehicle, characterized in that a control means to continue moving.