JPH0749168A - Refrigerator - Google Patents

Abstract

PURPOSE:To prevent trouble in the rotary compressor from occurring in burnout of the coil caused by deterioration in the heat-releasing performance under high outside- air temperature by operating, when the outside-air temperature is high, a compressor- cooling fan for a prescribed period of time after the rotary compressor is stopped. CONSTITUTION:When the power is turned on, the data in a controlling means 19 are all cleared. Then the condition detected by a freeze-chamber-temperature detective means 4 is read and, when the temperature of the freeze chamber is higher than the set value, the rotary compressor 6 is actuated. Next, after clearing a timer 22, the condition detected by an outside-air-temperature detective means 4 is read and, when the temperature is, for example, 20 deg.C or higher, a compressor-cooling fan 10 is turned on, whereas, when the temperature is below 20 deg.C, this compressor fan 10 is turned off. When the temperature detected by the freeze-chamber-temperature detective means 4 is below a prescribed point, the rotary compressor 6 is turned off. When the temperature detected by the outside-air- -temperature detective means 4 is, for example, below 30 deg.C, the compressor fan 10 is turned off, whereas, when the temperature is 30 deg.C or higher, the timer 22 is started and the compressor fan 10 is turned on. When the timer has counted up, the compressor fan 10 is turned off.

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 the control means of a conventional refrigerator. In FIG. 4, reference numeral 1 is a control means, which is formed by an external information storage means 2, an operation order determination means 3, etc., and the operation order determination means 3 determines the next operation depending on the order of confirmation of the operation and the state at that time. Contains the program. Reference numeral 4 is a freezing room temperature detecting means, 5 is an outside air temperature detecting means, the output of which is input to the control means 1. The output of the control means 1 is connected to the drive means 7 for operating the rotary compressor 6 and the drive circuit 9 for operating the compressor cooling blower 8, respectively.

FIG. 5 is a sectional view of a refrigerator provided with the control device having the above circuit configuration. 10 is a refrigerator main body, and a partition wall 1
1 divides into a freezer compartment 12 in the upper part and a refrigerating compartment 13 in the lower part. A machine room 14 is provided at the bottom of the refrigerator body 10. A rotary compressor 6 is provided in the machine room 14 together with a compressor cooling blower 8.
A condenser 15 is provided inside the outer wall of the refrigerator body 10. 16 is a cooler, 17 is a suction pipe,
The rotary compressor 6, condenser 15, decompression (not shown),
The cooler 16 and the suction pipe 17 constitute a series of refrigeration cycles. Reference numeral 18 denotes a blower for forcing the air cooled by the cooler 16 into the freezer compartment 12 and the refrigerating compartment 13. Reference numeral 4 is a freezing room temperature detecting means for detecting the temperature in the freezing room 12 and instructing the operation of the rotary compressor 6 and the blower 18. Reference numeral 5 denotes an outside air temperature detecting means for detecting the outside air temperature, which is provided in a part of the outer shell of the refrigerator body 10.

With reference to the flowchart of FIG. 6, the following will describe the control device for the refrigerator constructed as described above.
The operation will be described.

When the power is turned on, in step 100, all data of the microcomputer is cleared and initialization is performed. Next, at step 101, the state of the freezer compartment temperature detecting means 4 is read, and if the temperature of the freezer compartment 12 is higher than the set value, at step 102 a signal is output to the driving means 7 to operate the rotary compressor 6. The cooler 16 performs a cooling operation. At the same time, the blower 18 is operated and the cool air cooled by the cooler 16 is forcedly ventilated into the freezing compartment 12 and the refrigerating compartment 13.

Next, in step 103, the state of the outside air temperature detecting means 5 is read, and when the temperature is, for example, 20 ° C. or higher, a signal is output to the driving means 9 to operate the compressor cooling blower 8 in step 104. , To the rotary compressor 6. For this reason, the temperature of the surface of the rotary compressor 6 is lowered, and the seizure failure of the winding due to the deterioration of the heat radiation performance is suppressed.

In step 103, when the outside air temperature detecting means 5 is, for example, less than 20 ° C., in step 105, the signal of the drive circuit 9 is cut off so as to stop the blower 8 for cooling the compressor. Therefore, when the temperature of the rotary compressor 6 does not originally rise, that is, when the outside air temperature is sufficiently low, the compressor cooling blower 8 provided for the rotary compressor 6 stops unnecessarily. There is no need to operate the cooling blower 8 and useless consumption of electric power or shorten the life of the compressor cooling blower 8.

After that, if the freezer compartment 12 is cooled to a predetermined temperature, it is judged in step 101 that the temperature detector 4 is low, and in step 106, the rotary compressor 6 and the blower 18 are placed.
The signal of the driving means 7 is cut off in order to stop. Then, in step 105, the signal of the driving means 9 is cut off to stop the compressor cooling blower 8.

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

[0012]

However, according to the above-mentioned conventional configuration, the temperature of the rotary compressor does not easily drop even if the rotary compressor is stopped under the bad environmental conditions of summer when the outside air temperature is particularly high, and the rotary compressor is not cooled again. There was a drawback in that the temperature became abnormally high when starting operation, and if this was repeated, seizure failure of the winding was induced.

The present invention solves the conventional problems.
It is intended to prevent winding seizure failure due to deterioration of heat radiation performance of the rotary compressor when the outside air temperature is high.

[0014]

To achieve this object, a control device for a refrigerator of the present invention comprises a compressor cooling blower for cooling a rotary compressor, and when the outside air temperature is high, the rotary compressor is provided. This blower for cooling the compressor is operated for a predetermined time after the stop.

[0015]

In the refrigerator control means of the present invention, when the outside air temperature is high, the compressor cooling blower is operated for a predetermined time even after the rotary compressor is stopped, so that the surface temperature of the rotary compressor decreases.

[0016]

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 the control means of the refrigerator of this embodiment. In FIG. 1, reference numeral 19 is a control means, which includes an external information storage means 20, an operation order determination means 21, and a timer 22 for counting the time for operating the compressor cooling blower after the rotary compressor is stopped when the outside air temperature is high. Has been formed.

FIG. 2 is a sectional view of a refrigerator provided with the control device having the above-mentioned circuit configuration of the present invention. The operation of the refrigerator control device configured as described above will be described below with reference to the flowchart of FIG.

When the power is turned on, in step 200, all data in the control means 20 is 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 12 is higher than the set value, at step 202 the rotary compressor 6 is read.
In order to operate, the cooler 16 performs a cooling operation by outputting a signal to the driving means 7. At the same time, the blower 18 is operated and the cool air cooled by the cooler 16 is forcedly blown to the freezing compartment 12 and the refrigerating compartment 13.

Next, after the timer 22 is cleared in step 203, the state of the outside air temperature detecting means 4 is read in step 204. For example, when the temperature is 20 ° C. or higher, step 20
After turning on the compressor cooling blower 5 in step 5, step 20
Return to 1.

When the state of the outside air temperature detecting means 5 is less than 20 ° C. in step 204, the process proceeds to step 206, the compressor cooling blower 10 is turned off, and then the process returns to step 201.

Therefore, when the temperature of the outside air temperature detecting means 5 is high during the operation of the rotary compressor 6, the blower 1 for cooling the compressor 1
0 is operated to cool the rotary compressor 6 and the temperature of the rotary compressor 6 does not originally rise, that is, when the outside air temperature is sufficiently low, a compressor cooling blower 8 provided for the rotary compressor 6 Therefore, the compressor cooling blower 8 is not operated unnecessarily, and power consumption is not wasteful and the life of the compressor cooling blower 8 is not shortened.

When the temperature of the freezer compartment temperature detecting means 4 is lower than the predetermined temperature in step 201, the operation proceeds to step 207, the rotary compressor 6 is turned off and the operation proceeds to step 208. Step two
When the temperature of the outside air temperature detecting means 5 is less than 30 ° C. in 08, the routine proceeds to step 206, where the compressor cooling blower 10 is turned off.
FF, and if step 208 is above 30 ° C, step 2
Go to 09. After the timer 22 is started in step 209, the process proceeds to step 210 and the compressor cooling blower is turned on.
N and proceed to step 211.

If the timer has not counted up in step 211, the process returns to step 201. If the timer has counted up, the timer is cleared in step 212 and the process proceeds to step 206 to turn off the compressor cooling blower 10.

Therefore, when the outside air temperature is high, the compressor cooling blower 10 is operated for a predetermined time even after the rotary compressor 6 is stopped, so that the surface temperature of the rotary compressor 6 can be sufficiently lowered. Even when the outside air temperature is particularly high, it is possible to prevent the winding seizure failure due to the deterioration of the heat dissipation performance.

[0026]

As is apparent from the above embodiments, according to the present invention, a refrigerating cycle composed of a rotary compressor, a condenser, a cooler and a suction pipe, and a freezer compartment temperature detecting means for detecting the temperature inside the refrigerator, Provided in the machine room that houses the rotary compressor,
It has a compressor blower for forcedly cooling the rotary compressor, an outside air temperature detecting means for detecting the outside air temperature, and a timer for counting the time for operating the compressor cooling blower after stopping the rotary compressor when the outside air temperature is high. When the outside air temperature is high, the blower for cooling the compressor is operated for a predetermined time even after the rotary compressor is stopped, so that the surface temperature of the rotary compressor is sufficiently lowered even when the outside air temperature is particularly high. Therefore, it is possible to prevent the winding failure of the winding due to the deterioration of the heat radiation performance, which has a great effect.

[Brief description of drawings]

FIG. 1 is a block diagram of a control unit 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 unit 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 Detecting Means 5 Outside Air Temperature Detecting Means 6 Rotary Compressor 10 Compressor Cooling Blower 14 Machine Room 15 Condenser 16 Cooler 17 Suction Pipe 19 Control Means 22 Timer

Claims (1)

[Claims] 1. A refrigeration cycle including a rotary compressor, a condenser, a cooler, and a suction pipe, a freezer compartment temperature detecting means for detecting a temperature inside the refrigerator, and a rotation chamber provided in a machine room accommodating the rotary compressor. It has a blower for cooling the compressor for forcibly cooling the compressor, and an outside air temperature detecting means for detecting the outside air temperature, and cools the compressor when the outside air temperature detecting means is above a predetermined temperature during the operation of the rotary compressor. Of the rotary compressor O when the temperature of the outside air temperature detecting means is particularly high by operating the blower
A refrigerator provided with a control means for operating the blower for cooling the compressor for a certain period of time after FF.