JPH07208848A - Controller for refrigerator - Google Patents

Abstract

PURPOSE:To prevent seizing trouble of a winding due to deterioration of heat dissipation of a rotary compressor by rotating a compressor blower at a high speed at the time of turning ON a power source, and cooling the compressor. CONSTITUTION:The controller 18 for a refrigerator comprises driving means 6 for operating a rotary compressor 5 by inputting a signal from a temperature sensor 3 to a microcomputer 19, driving means 8 for operating a blower 7 for the compressor, and a blower integrating timer 21 for the compressor connected with number-ofrevolutions control means 20 of the blower 7 to count to integrate tide of operating the blower in the microcomputer 19.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refrigerator using a rotary compressor, and more particularly to a refrigerator in which the rotary compressor is cooled by a blower.

[0002]

2. Description of the Related Art In recent years, in many refrigerators, a small rotary compressor is used as a compressor of a refrigeration cycle in order to effectively use a space in a refrigerator.

As a conventional operation control of a refrigerator, there is one disclosed in Japanese Patent Application Laid-Open No. 2-136669. Hereinafter, operation control of a conventional refrigerator will be described with reference to the drawings.

FIG. 5 is a block diagram of a conventional refrigerator control device. In FIG. 5, reference numeral 1 is a control device, which is a control microcomputer 2 (hereinafter referred to as a microcomputer).
Further, the temperature detector 3 and the outside air temperature detector 4 are input. The output of the microcomputer 2 is connected to a drive means 6 for operating the rotary compressor 5 and a drive means 8 for operating the compressor blower 7, respectively.

FIG. 6 is a sectional view of a refrigerator provided with the control device 1 having the above circuit configuration. 9 is a refrigerator body, and a partition wall 1
0 defines a freezer compartment 11 in the upper part and a refrigerating compartment 12 in the lower part. Reference numeral 13 denotes a machine room, which is provided in the lower part of the refrigerator main body 9 and is provided with both the rotary compressor 5 and the compressor blower 7. A condenser 14 is provided inside the outer wall of the refrigerator body 9. 15 is a cooler, 16
Is a suction pipe, and the rotary compressor 5, condenser 14, decompression (not shown), cooler 15, and suction pipe 16 constitute a series of refrigeration cycles.

Reference numeral 17 is a blower for forcing the air cooled by the cooler 15 into the freezing compartment 11 and the refrigerating compartment 12. 3 detects the temperature in the freezer compartment 11,
It is a temperature detector for instructing the operation of the rotary compressor 5 and the blower 17. Reference numeral 4 denotes an outside air temperature detector for detecting the outside air temperature, which is provided in a part of the outer shell of the refrigerator body 9.

On the back surface of the refrigerator main body 9, a control device 1 having the above-mentioned circuit is attached.

Referring to the flow chart of FIG. 7, the following will describe the control device for the refrigerator constructed as described above.
The operation will be described.

FIG. 7 is a flowchart showing the entire control program stored in the microcomputer 2. When the power is turned on, in step 100, all the microcomputer data is cleared and initialization is performed. Next, at step 101, the state of the temperature detector 3 is read, and if the temperature of the freezer compartment 11 is higher than the set value, at step 102, a signal is output to the driving means 6 to operate the rotary compressor 5, and cooling is performed. The vessel 15 performs a cooling action. At the same time, the blower 17 is operated to cool the cool air cooled by the cooler 15.
1, forced air is blown to the refrigerator compartment 12.

Next, in step 103, the state of the outside air temperature detector 4 is read, and when it is above a predetermined temperature (for example, 20 ° C.), a signal is sent to the driving means 7 to operate the compressor blower 7 in step 104. Is output to the rotary compressor 5.

After that, if the freezer compartment 11 is cooled to a predetermined temperature, it is judged in step 101 that the temperature detector 3 is low, and in step 105, the rotary compressor 5 and the blower 17
The signal of the driving means 6 is cut off in order to stop. Then, in step 106, the signal of the driving means 8 is cut off so as to stop the blower 7 for the compressor.

When the outside air temperature detector 4 is lower than a predetermined temperature (for example, 20 ° C.) in step 103, step 1
At 06, the signal of the drive circuit 8 is cut off to stop the compressor blower 7.

Thereafter, this operation is repeated to perform a normal cooling operation.

[0014]

However, in the above-mentioned conventional configuration, the blower for the compressor is normally rotating in a high load state in which the temperature inside the warehouse is high when the power is turned on, and the cooling air volume is insufficient to allow the rotary compressor to operate. However, there is a drawback in that the temperature becomes high and the baking failure of the winding due to the deterioration of the heat radiation performance is induced.

The present invention solves the conventional problems.
The purpose of this is to prevent the seizure failure of the winding due to the deterioration of the heat radiation performance of the rotary compressor under high load when the power is turned on.

[0016]

In order to achieve this object, a control device for a refrigerator according to the present invention is provided with a compressor blower for cooling a rotary compressor, which is provided during operation of the compressor when the power is turned on. The blower for a compressor is operated at high speed.

[0017]

In the controller of the refrigerator of the present invention, when the power is turned on, the blower for the compressor operates at high speed, so that the temperature of the surface of the rotary compressor is lowered and the winding failure due to the deterioration of the heat radiation performance is prevented. It can be prevented.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A refrigerator according to an embodiment of the present invention will be described with reference to FIGS. It should be noted that the same components as those of the related art are designated by the same reference numerals, and detailed description thereof will be omitted.

FIG. 1 is a block diagram of a control device for a refrigerator according to this embodiment. In FIG. 1, reference numeral 18 denotes a control device, and a rotation speed control means 20 for increasing the rotation speed of the compressor blower 7 is connected to the output of a control microcomputer 19 (hereinafter, referred to as a microcomputer).

Further, inside the microcomputer 19, there is provided a compressor blower integration timer 21 for integrating and counting the time during which the compressor blower 7 is operating.

FIG. 2 is a sectional view of a refrigerator provided with the control device having the above-described circuit configuration of the present invention, and the control device 18 having the above-mentioned circuit is attached to the rear surface.

With reference to the flow chart of FIG. 3, the control device for the refrigerator constructed as described above will be described below.
The operation will be described. FIG. 3 is a flowchart showing the entire control program stored in the microcomputer 19.

When the power is turned on, in step 200, all the data of the microcomputer 19 is cleared and initialization is performed. Next, at step 201, an initial flag which is one of the data of the microcomputer 19 is set.
Next, in step 202, the state of the temperature detector 3 is read,
If the temperature of the freezer compartment 11 is higher than the set value, step 2
At 03, a signal is output to the driving means 6 to operate the rotary compressor 5, and the cooler 15 performs a cooling action. At the same time, the blower 17 is operated and the cool air cooled by the cooler 15 is forcibly blown to the freezing compartment 11 and the refrigerating compartment 12.

Next, at step 204, the state of the initial flag is read, and when the initial flag is reset, at step 205 the rotation speed of the compressor blower 7 is set to the normal rotation (for example, 3600 rpm) by the rotation speed control means 20. To do. Then, in step 206, a signal is output to the drive unit 8 to operate the compressor blower 7 and the air is blown to the rotary compressor 5.

Further, in step 204, the state of the initial flag is read, and when the initial flag is set, in step 207, the rotation speed of the compressor blower 7 is set to a high speed rotation (for example, 4000 rpm) by the rotation speed control means 20. set. Then, in step 206, a signal is output to the driving means 8 to operate the compressor blower 7.

After that, if the freezing compartment 11 is cooled to a predetermined temperature, it is judged in step 202 that the temperature detector 3 is low, and in step 208, the drive means 6 is operated to stop the rotary compressor 5 and the blower 17. Block the signal, step 20
At 9, the initial flag is reset. Then, in step 210, the signal of the driving means 8 is cut off so as to stop the blower 7 for the compressor.

For this reason, during the operation of the compressor when the power is turned on, the blower 7 for the compressor operates at a high speed until the compressor is first stopped, so that the cooling air volume increases and the surface temperature of the rotary compressor 5 increases. It is possible to suppress the seizure failure of the winding due to the deterioration of the heat radiation performance.

Next, a control device for a refrigerator according to another embodiment will be described with reference to the flow chart of FIG. The same components as those in the conventional example and the first embodiment are designated by the same reference numerals, and detailed description thereof will be omitted.

In step 204, the state of the initial flag is read. When the initial flag is set, the state of the blower accumulating timer 21 for the compressor is read in step 300. When it is less than the predetermined integration time, in step 207 the blower for the compressor is read. The rotation speed of 7 is changed to high speed rotation speed control means 2
0 is set, and a signal is output to the driving means 8 to operate the compressor blower 7 in step 206. When the compressor blower integration timer 21 reaches the predetermined time in step 300, the process proceeds to step 205, and the compressor blower 7
The rotation speed control means 20 is set to the normal rotation speed.

After that, if the freezing chamber 11 is cooled to a predetermined temperature, it is determined in step 202 that the temperature detector 3 is low, and in step 208, the driving means 6 of the driving means 6 is operated to stop the rotary compressor 5 and the blower 17. Block the signal, step 20
At 9, the initial flag is reset. Then, in step 210, the signal of the driving means 8 is cut off so as to stop the blower 7 for the compressor.

Therefore, during operation of the compressor when the power is turned on,
Since the compressor blower 7 operates at a high speed for a certain period of time, the cooling air volume increases, the surface temperature of the rotary compressor 5 decreases, and seizure failure of the winding due to deterioration of heat dissipation performance is suppressed.

[0032]

As is apparent from the above embodiments, according to the present invention, a refrigeration cycle including a rotary compressor, a condenser, a cooler and a suction pipe, and a temperature detector for detecting the temperature inside the refrigerator,
Provided in a machine room accommodating the rotary compressor, having a compressor blower for forcibly cooling the rotary compressor in synchronization with the operation of the rotary compressor, and when the power is turned on, the blower for the compressor is Since it has a control circuit that rotates at high speed, when the temperature inside the refrigerator is high when the power is turned on, the compressor blower rotates at high speed to determine that the load is high, and cooling is performed to blow air to the rotary compressor. The amount of air flow increases, the surface temperature of the rotary compressor decreases, and the seizure failure of the winding due to the deterioration of the heat radiation performance is suppressed, and a great effect is surely obtained.

[Brief description of drawings]

FIG. 1 is a block diagram of a control circuit of a refrigerator according to an embodiment of the present invention.

FIG. 2 is a sectional view of the refrigerator.

[Fig. 3] Flow chart of the refrigerator

FIG. 4 is a flowchart of a refrigerator according to another embodiment of the present invention.

FIG. 5 is a block diagram of a control circuit of a refrigerator showing a conventional example.

FIG. 6 is a sectional view of the refrigerator.

FIG. 7: Flow chart of the refrigerator

[Explanation of symbols]

 3 Temperature Detector 5 Rotary Compressor 7 Compressor Blower 13 Machine Room 14 Condenser 15 Cooler 16 Suction Pipe 18 Control Device 19 Microcomputer 20 Rotation Speed Control Means 21 Compressor Blower Integrated Timer

Claims (2)

[Claims] 1. A refrigeration cycle composed of a rotary compressor, a condenser, a cooler and a suction pipe, a temperature detector for detecting a temperature inside the refrigerator, and a rotary compressor provided in a machine room accommodating the rotary compressor. Of the compressor for forcibly cooling the rotary compressor in synchronism with the operation of the compressor, and a blower integration timer for integrating the operating time of the compressor blower, and when the power is turned on, the in-compartment temperature detector has a predetermined temperature. In the above case, the refrigerator control device including the control circuit for rotating the compressor blower at high speed until the compressor stops during the first operation of the compressor. 2. The refrigerator according to claim 1, wherein at the time of power-on, when the temperature inside the refrigerator is equal to or higher than a predetermined temperature, the compressor blower is rotated at high speed until the blower integration timer finishes integration for a predetermined time. Control device.