JPH0791793A - Refrigerator - Google Patents

Abstract

PURPOSE:To eliminate a seizing trouble of a winding due to deterioration of a heat dissipating performance of a rotary compressor even if the compressor is so operated that the compressor is continuously operated for a long time that an interior of a refrigerator is not cooled at all at the time of energizing a power source by rotating a blower for cooling the compressor at a high speed during operating of the compressor at the time of energizing the power source and strongly cooling the compressor. CONSTITUTION:The refrigerator comprises drive means 6 connected at its input with a refrigerating chamber temperature sensor 4 to operate a rotary compressor 5, drive means 8 for operating a compressor cooling blower 7, and control means 18 connected at its output to number-of-revolutions control means 21 of the blower 7.

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. 4 is a block diagram of a conventional refrigerator control device. In FIG. 4, reference numeral 1 denotes a control device composed of an external information storage means 2, an action order determination means 3 and the like,
The freezer compartment temperature detection means 4 is input. The output of the control means 1 is connected to a drive means 6 for operating the rotary compressor 5 and a drive means 8 for operating the compressor cooling blower 7, respectively.

FIG. 5 is a sectional view of a refrigerator provided with the control device having the above circuit configuration. 9 is a refrigerator body, and a partition wall 10
Is divided into a freezer compartment 11 at the top and a refrigerating compartment 12 at the bottom. A machine room 13 is provided below the refrigerator body 9. A rotary compressor 5 is provided in the machine room 13 together with the compressor blower 7. A condenser 14 is provided inside the outer wall of the refrigerator body 9.

Reference numeral 15 is a cooler and 16 is a suction pipe. The rotary compressor 5, condenser 14, decompression (not shown), cooler 15 and suction pipe 16 constitute a series of refrigeration cycles. . Reference numeral 17 denotes a blower for forcedly convection the air cooled by the cooler 15 into the freezer compartment 11 and the refrigerating compartment 12. Reference numeral 4 denotes a freezing compartment temperature detecting means for detecting the temperature in the freezing compartment 11 and issuing an instruction to operate the rotary compressor 5 and the blower 17.

Further, a control device 1 having the above-mentioned circuit is attached to the rear surface of the refrigerator body 9.

Referring to the flow chart of FIG. 6, the following will describe the control device for the refrigerator constructed as described above.
The operation will be described.

FIG. 6 is a flowchart showing the entire control program stored in the control means 1. When the power is turned on, in step 100, all data in the control means 1 is cleared and initialization is performed. Next, at step 101, the state of the freezer compartment temperature detection means 4 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 drive means 6 to operate the rotary compressor 5. 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 forcedly ventilated into the freezing compartment 11 and the refrigerating compartment 12.

Next, in step 103, a signal is output to the drive means 8 to operate the compressor cooling blower 7 and the air is blown to the rotary compressor 5. For this reason, the temperature of the surface of the rotary compressor 5 is lowered, and the seizure failure of the winding due to the deterioration of the heat radiation performance is suppressed.

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 104, 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 105, the signal of the driving means 8 is cut off in order to stop the compressor cooling blower 7.

After that, this operation is repeated to perform a normal cooling operation.

[0013]

However, in the above-mentioned conventional structure, the rotary compressor is continuously operated for a long time when the inside of the refrigerator is not cooled at the time of turning on the power, and the blower for cooling the compressor is used. Since the number of rotations is the same as that during normal operation, there is a drawback that the amount of cooling air is insufficient and a winding failure of the winding is caused due to deterioration of heat dissipation performance.

The present invention solves the conventional problems.
It is intended to prevent winding failure due to deterioration of heat radiation performance of the rotary compressor when the rotary compressor is continuously operated for a long time when the power is turned on.

[0015]

To achieve this object, a control device for a refrigerator according to the present invention is provided with a compressor cooling blower for cooling a rotary compressor, and the rotary compressor is turned on when the power is turned on. Is to operate the blower for cooling the compressor at high speed.

[0016]

In the refrigerator control device of the present invention, the compressor cooling blower is operated at a high speed while the rotary compressor is on when the power is turned on. Even with continuous operation, the cooling air volume is increasing, so the temperature of the surface of the rotary compressor is reduced, and it is possible to prevent seizure failure of the winding.

[0017]

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 composed of an external information storage means 19, an operation order determination means 20, etc., to which the freezer compartment temperature detection means 4 is input. The output of the control means 18 is connected to a rotation speed control means 21 for increasing the rotation speed of the compressor cooling blower 7.

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 above will be described below.
The operation will be described. FIG. 3 is a flowchart showing the entire control program stored in the control means 18.

When the power is turned on, as step 200, all the data of the control means 18 are cleared and initialization is performed. Next, at step 201, the state of the freezer compartment temperature detecting means 4 is read. If the temperature of the freezer compartment 11 is higher than the set value, at step 202 the rotary compressor 5 is read.
In order to operate, the cooler 15 performs a cooling action by outputting a signal to the driving means 6. 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 203, the rotational speed of the blower 7 for cooling the compressor is set to a high speed (for example, 4000 rpm).
The rotation speed control means 21 is set to. Then, in step 204, a signal is output to the drive means 7 to operate the compressor blower 7. If the freezing compartment 11 is cooled to a predetermined temperature, the freezing compartment temperature detecting means 4 is determined to be low in step 201, and the rotary compressor 5 and the blower 17 are stopped in step 205 so as to stop the driving means 6. Cut off the signal.

Then, in step 206, the signal of the driving means 8 is cut off so as to stop the blower 7 for the compressor. Therefore, even if the rotary compressor operates continuously for a long time when the power is turned on, the blower for cooling the compressor operates at high speed, so that the cooling air volume increases, the surface temperature of the rotary compressor decreases, and the winding seizure failure occurs. Can be prevented.

Next, at step 207, the state of the freezer compartment temperature detecting means 4 is read, and if the temperature of the freezer compartment 11 is higher than the set value, at step 208 a signal is sent to the driving means 6 to operate the rotary compressor 5. Is output, 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 forcedly ventilated into the freezing compartment 11 and the refrigerating compartment 12.

Next, at step 209, the rotation number of the compressor cooling blower 7 is set to the normal rotation (for example, 3600 rp).
The rotation speed control means 21 is set to m). Then, in step 210, in order to operate the blower 7 for cooling the compressor, a signal is output to the drive means 8 to blow air to the rotary compressor. For this reason, the temperature of the surface of the rotary compressor 5 is lowered, and the seizure failure of the winding due to the deterioration of the heat radiation performance during the normal operation is suppressed.

After that, if the freezing chamber 11 is cooled to a predetermined temperature, it is judged in step 207 that the temperature detecting means 4 is low, and in step 211, the rotary compressor 5 and the blower 1
The signal of the driving means 6 is cut off in order to stop 7. And
In step 212, the signal of the driving means 8 is cut off to stop the compressor cooling blower 7.

After that, this operation is repeated to perform a normal cooling operation.

[0028]

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, a temperature detector for detecting the temperature inside the refrigerator, and It has a compressor cooling blower for forcibly cooling the rotary compressor in synchronism with the operation of the rotary compressor provided in a machine room that houses the rotary compressor, and when the rotary compressor is operating when the power is turned on, Since the compressor cooling blower is provided with a control circuit for rotating the blower at high speed, even if the rotary compressor continues to operate continuously for a long time when the inside of the refrigerator is not cooled at the time of turning on the power, the compressor The cooling blower rotates at a high speed to increase the amount of cooling air blown to the rotary compressor, the surface temperature of the rotary compressor is lowered, and the seizure failure of the winding due to the deterioration of the heat radiation performance is suppressed, which has a great effect.

[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 block diagram of a control circuit of a refrigerator showing a conventional example.

FIG. 5 is a sectional view of the refrigerator.

FIG. 6 is a flowchart of the refrigerator.

[Explanation of symbols]

 4 Freezing Room Temperature Detection Means 5 Rotary Compressor 7 Compressor Cooling Blower 13 Machine Room 18 Controller 21 Rotation Speed Control Means

Claims (1)

[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. A refrigerator having a compressor cooling blower that forcibly cools the rotary compressor in synchronism with the operation of, and a control circuit that rotates the compressor cooling blower at a high speed during the operation of the rotary compressor when the power is turned on. .