JPH0113619Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Field of Application) This invention relates to a compressor control device that operates a compressor intermittently during the off-season of an automobile cooling system.

(Prior art) Conventionally, as this type of device, for example,
As shown in Japanese Patent No. 9777, a compressor drive circuit is connected to a starting switch of a central greasing system, and the compressor is operated in conjunction with the opening and closing of the starting switch. .

(Problems to be solved by the invention) However, in the above conventional example, a central lubrication device is essential, and it cannot be applied to vehicles that do not have this device. However, there was a problem in that if the central lubrication system was used while the engine was stopped, the cooling system would not be driven and the purpose could not be fully achieved.

Therefore, the object of this invention is to provide a compressor control device for an automobile cooling system during the off-season, which can be applied to all types of vehicles and operates reliably.

(Means for solving the problem) The gist of this invention is to provide a counting means for counting the number of times the driving engine is driven;
a determining means for determining whether or not it is the off-season time; and when the determining means determines that it is the off-season time, the number of times the driving engine is driven as counted by the counting means is equal to or greater than a predetermined value; The present invention relates to a compressor control device for an automobile cooling system, which has a drive means for sometimes driving a compressor.

(Function) Therefore, each time the driving engine is driven, the number of times it is driven is counted, and when this counted value exceeds a predetermined value during the off-season, the compressor is forcibly driven. It is possible to accomplish the task.

(Example) Hereinafter, an example of this invention will be described with reference to the drawings.

In FIG. 1, 1 is a driving engine, 2 is a belt transmission mechanism, 3 is an electromagnetic clutch, and 4 is a compressor (not shown) for compressing refrigerant in a cooling cycle.
By operating the belt transmission mechanism 2
The driving engine 1 drives the engine 1 via the belt transmission mechanism 2. The electromagnetic clutch 3 is operated by the excitation of the excitation coil 3a by the drive circuit 5.

On the other hand, 6 is a power source, and a key switch 7 and a cooling switch 8 are connected in series to the power source 6. One end of the key switch 7 is connected to an engine circuit (not shown) and an alternator 9, and when the key switch 7 is turned on, a voltage is applied to the engine circuit and the alternator 9, so that each starts operating. Further, one end of the air conditioner switch 8 is connected to an arithmetic circuit 10 which will be described later, and cooling is performed when the air conditioner switch 8 is turned on.

The calculation circuit 10 calculates and outputs a signal for controlling the operation of the drive circuit 5 based on detection signals from a temperature setting device 11 that sets the temperature inside the vehicle interior and a temperature sensor 12 that detects the temperature inside the vehicle interior. By opening and closing the air conditioner switch 8, it is determined whether or not it is the off-season of the air conditioner, and if the air conditioner switch 8 is closed, it is determined that it is the season and a count determination circuit 13 (described later) is reset. Output a signal.

The counting judgment circuit 13 counts the number of times the key switch 7 is turned on, that is, the driving engine 1 is driven, and is connected to one of the output terminals of the alternator 9, so that the output terminal changes from the "L" signal to the "H" signal.
Counting is performed by detecting the change in signal.

FIG. 2 shows a block diagram of this counting judgment circuit 13, and 14 is a counter circuit that counts the number of times the alternator 9 is operated up to a predetermined number of times. A trigger signal is output to the monostable oscillation circuit 15. Furthermore, if the cooling switch 8 is turned on during counting, the count value is returned to zero by a reset signal output from the arithmetic circuit 10, and the counting is started again. The monostable oscillation circuit 15 outputs an "H" signal to the drive circuit 5 for a predetermined period of time in response to a trigger signal from the counter circuit 14. The drive circuit 5 is activated by this "H" signal and excites the electromagnetic clutch 3. Further, the monostable oscillation circuit 1
The "H" output signal of No. 5 is also applied to the counter circuit 14, and the count value of the counter circuit 14 is set to zero.

In the above configuration, the key switch 7 is turned on to start the driving engine 1. When the key switch 7 is turned on, the driving engine 1 starts operating via an engine circuit (not shown). At the same time, the alternator 9 also starts operating, an "H" signal is output to the output terminal connected to the count determination circuit 13, and the counter circuit 14 sets the count value to 1. After that, while the air conditioner switch 8 is not turned on,
Each time the key switch 7 is turned on, the count value is incremented by one, and when it reaches a predetermined value, a trigger signal is output. The monostable oscillation circuit 15 receives this trigger signal and outputs an "H" signal for a predetermined period of time. This "H" signal causes the counter circuit 14 to set the count value to zero, while the drive circuit 5 excites the electromagnetic clutch 3. Therefore, the compressor 4 is driven while the monostable oscillation circuit 15 outputs an "H" signal for a predetermined period of time.

Next, if the cooling switch 8 is turned on before the count value of the counter circuit 14 reaches a predetermined value, the counter circuit 14
A reset signal is output to the counter circuit 14.
returns the count value to zero and starts counting again from the beginning.

In this embodiment, the starting of the driving engine 1 is detected based on the output signal of the alternator 9, but opening/closing of the key switch 7 may be directly detected.

(Effects of the invention) As described above, according to this invention, the number of times the driving engine is driven is counted, and when this counted value exceeds a predetermined value during the off-season of the air conditioner, the compressor is driven. So,
The present invention can be applied to any vehicle equipped with an air conditioner, and since the control is performed based on the number of times the driving engine is driven, the compressor can be driven reliably.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram of a compressor control device according to the invention, and FIG. 2 is a block diagram of a count determination circuit used in the same compressor control device. 7...Key switch, 8...Cooling switch, 9
...Alternator, 13...Counting judgment circuit, 14
... Counter circuit, 15 ... Monostable oscillation circuit.

Claims (1)

[Claims for Utility Model Registration] 1. A counting means for counting the number of times the driving engine is driven, a determining means for determining whether or not it is the off-season time, and a determination means for determining whether it is the off-season time. a compressor control device for an automobile cooling system, comprising: a drive means for driving the compressor when the number of times the driving engine is driven as counted by the counting means exceeds a predetermined value; 2. A compressor control device for an automobile cooling system according to claim 1, wherein the counting means inputs an open/close signal of a key switch. 3. A compressor control device for an automobile cooling system according to claim 1 or 2, wherein the determining means inputs an opening/closing signal of an air conditioner switch.