JPS6349676A - Refrigerator control device - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a control device for a refrigerator-freezer that performs quick freezing operation.

[Conventional technology]

FIG. 4 is a schematic configuration diagram showing a control device for this type of refrigerator-freezer. In the figure, 1 is the refrigerator body, 2 is the freezer compartment divided into compartments, 3 is the quick freezing operation switch installed on the door of the freezer compartment 2, and 4 is installed in the cooling room behind the freezer compartment 2. 5 is a blower disposed above the cooler 4, 6 is a refrigeration cycle compressor, 7 is a control unit that controls the blower 5, compressor 6, etc. in accordance with signals from the operation switch 3, etc.; 8 is an AC type.

FIG. 5 is a diagram showing a conventional control circuit configuration in a refrigerator-freezer control device having the above configuration. In the figure, 9 is a resistor connected in series with the operation switch 3, and 10 is a microcomputer (hereinafter referred to as microcomputer) that controls the entire operation, and a timer 1.
Built-in 0a. 11 and 12 are microcontroller 1 respectively
a drive circuit for the compressor 6 and the blower 5 connected to 13;
．． Relays 14 are controlled by drive circuits 11 and 12, and their contacts are connected between the compressor 6, the blower 5, and the AC power source 8.

15 is a capacitor for driving the blower motor.

The conventional refrigerator/freezer control device is configured as described above.
When the refrigerant is compressed and circulated by the compressor 6, the cooler 4
The surrounding air is cooled. This cool air is agitated by the blower 5 and circulates within the refrigerator as shown by the arrow in FIG.

The temperature inside the freezer compartment 2 is adjusted to a set temperature by operating and stopping the compressor 6 and the blower 5 by the control unit 7.

Next, specific operations will be described with reference to the flowchart in FIG. This flowchart shows a quick freezing operation program stored in the microcomputer 10.

When the quick freezing operation switch 3 is operated, the connection between the switch 3 and the resistor 9 becomes H (high level).
The microcomputer 10 sets the quick freezing start flag F to 1. Then, in step 21, it is determined whether or not this quick freezing start flag F is 1, and if it is 1, the process of driving (ON) the compressor 6 is performed in step 22, and in step 23
1A filling is performed to drive the air blower R5. Specifically, a signal is sent to each drive circuit 11.12 of the compressor 6 and blower 5 to energize each relay 13.14.

Now, the drive current from the AC power supply 8 is supplied to the compressor 6 and the blower 5, and the quick freezing operation is started. At this time,
The rotational speed of the blower 5 is determined by the capacity of the driving capacitor 15, and the blower 5 rotates at a constant rotational speed.

Next, in step 24, timer 1 built into the microcomputer 10 is activated.
0a is operated to integrate the time since the start of rapid freezing, and in step 25 it is determined whether the integrated time has elapsed for a certain period of time. If a certain period of time has elapsed, the compressor 6 is stopped (OFF) in step 26, and the blower 5 is stopped in step 27. That is, the respective drive circuits 11.1 of the compressor 6 and the air blower 15
2, and both relays 13 and 14 are deenergized. Then, in step 28, the quick freezing start flag F is set to O, and the quick freezing operation ends.

[Problem that the invention seeks to solve]

However, with the conventional refrigerator/freezer control device described above, the rotation speed of the fan remains constant even during quick freezing operation, which increases the time required for quick freezing and consumes a large amount of power. There was a problem.

The present invention was made to solve these problems, and an object of the present invention is to provide a control device for a refrigerator-freezer that can shorten quick freezing time and reduce power consumption.

(Means for Solving Problems) A control device for a refrigerator-freezer according to the present invention includes a blower that blows cold air cooled by a cooler into a freezer compartment, and operates a compressor of a refrigeration cycle and the blower during quick freezing operation. This is a control device for a refrigerator/freezer that operates for a fixed period of time, and is equipped with a control unit that makes the drive capacitor of the blower variable in capacity, and increases the capacitor capacity during rapid freezing operation to increase the rotation speed of the blower. .

(Function) The il control section increases the capacity of the drive capacitor of the blower motor during quick freezing operation to reduce the rotation speed of the blower. This shortens the quick freezing time and controls power consumption.

[Fruitful example]

Examples of the present invention will be described below.

FIG. 1 is a circuit diagram showing an embodiment of the present invention.

In the figure, numerals 3 and 5 to 15 are the same constituent elements as those of the prior art described above with the same symbols, so the details will be omitted. The drive capacitor for the blower motor consists of a condenser 15 during normal operation and a capacitor 16 during quick freezing operation, which are switched by a relay 17. and,
This relay 17 is 11 controlled by a drive circuit 18,
When the relay 17 is energized during quick freezing operation, the capacitor 17 is connected to the blower motor, and the number of revolutions of the blower 5 increases.

Next, the operation will be explained with reference to the flowchart shown in FIG. Note that the control program shown in this flowchart is stored in the microcomputer 10, and
The operations of steps 21 to 28 are similar to those of the same step numbers in FIG.

When the quick freezing operation is started, at the same time as the compressor 6 and the blower 5 are driven, the condenser for driving the blower motor is switched in step 29. Specifically, a signal is sent from the microcomputer 10 to the drive circuit 18 to energize the switching relay 17. Now the blower motor has capacitor 1 during normal operation.
Better than 5! A large capacitor 16 is connected, and the rotation speed of the blower 5 becomes higher than during normal operation. Next, in step 25, it is determined whether a certain period of time set by the timer 10a has elapsed, and if so, the compressor 6 and the blower 5 are stopped. Here, the setting time of the timer 10a can be made shorter than conventionally. This is because the rotational speed of the blower 5 is increased during the quick freezing operation, which shortens the quick freezing time and prevents excessive power consumption. Simultaneously with the stop F of the compressor 6 and blower 5, the drive capacitor is switched in step 30, and the capacitor 15 in normal operation is connected to the blower motor. Finally, the quick freezing start flag F is set to O, and the quick freezing operation is ended.

FIG. 3 is a circuit diagram showing another embodiment of the present invention. In the above-mentioned embodiment, the capacitor for driving the blower motor was changed in capacity by switching between the capacitor 15 during normal operation and the separately provided capacitor 16 using the relay 17, but in this embodiment, the capacitor for driving the blower motor The drive capacitor is capacitor 15 during normal operation.
and a capacitor 19 connected in parallel with this during rapid freezing operation. That is, during normal operation, the capacitor 15 is connected without going through the contacts of the relay 17, and during quick freezing operation, the relay 17 is energized to connect the capacitor 15.
A capacitor 19 is connected in parallel with the capacitor 19 to increase the capacitance. Even with such a configuration, the rotation speed of the blower 5 can be increased during the quick freezing operation, and the quick freezing time can be shortened.

〔Effect of the invention〕

As explained above, according to the present invention, the drive capacitor of the blower motor is made variable in capacity, and the capacity of the capacitor is increased during quick freezing operation to increase the rotation speed of the blower, thereby shortening the quick freezing time. This has the effect of reducing power consumption.

[Brief explanation of drawings]

Fig. 1 is a circuit diagram showing one embodiment of the present invention, Fig. 2 is a flowchart showing its operation, Fig. 3 is a circuit diagram showing another embodiment of the invention, and Fig. 4 is a diagram of a refrigerator-freezer. FIG. 6, a circuit diagram of the control device, is a flowchart showing its operation. 1...Refrigerator body 2---- Freezer compartment 4...Cooler 5...Blower 6...Compressor 7...- ;fu control unit 15...drive capacitor 16-...capacitor 19...capacitor Note that the same reference numerals in the drawings indicate the same or equivalent parts.

Claims (2)

[Claims] (1) In a control device for a refrigerator-freezer that is equipped with a blower that blows cold air cooled by a cooler into a freezer compartment and that drives a refrigeration cycle compressor and the blower for a certain period of time during rapid freezing operation, a capacitor for driving the blower motor is used. A control device for a refrigerator-freezer, comprising a control unit that makes the capacitor variable, increases the capacitance of the capacitor during quick freezing operation, and increases the rotational speed of the blower. (2) The refrigerator-freezer according to claim 1, wherein the drive capacitor of the blower motor consists of a capacitor during normal operation and a capacitor connected in parallel with this capacitor during quick freezing operation. Control device.