JPH0791802A - Controller for refrigerator - Google Patents

Abstract

PURPOSE:To prevent the corrosion of food as well as the trouble of a compressor due to the continuation of abnormal condition by a method wherein abnormality is indicated and the stopping of operation of the compressor is effected at every predetermined times when the discharging pipe temperature detector of the compressor has continued the detection of a temperature higher than a predetermined temperature for a predetermined period of time. CONSTITUTION:In a controller 19 for a refrigerator, the output of a temperature detector 3 for detecting the inside temperature of the refrigerator and the output of a discharging pipe temperature detector 8 are inputted into a microcomputer 20 while a driving means 5 for operating a compressor 4, another driving means 7 for operating a fan 6 for cooling the compressor, and the other driving means 22 for operating an abnormality indicator 12 are connected to the output side of the microcomputer 20.

Description

Detailed Description of the Invention

[0001]

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

[0002]

2. Description of the Related Art Conventionally, operation control of a refrigerator is disclosed in Japanese Patent Laid-Open No. 3-8.
There is one disclosed in Japanese Patent No. 4366.

The conventional configuration will be described below with reference to the drawings. FIG. 5 is a block diagram of a conventional refrigerator control device. In FIG. 4, reference numeral 1 is a refrigerator control device, and a temperature detector 3 is input to a control microcomputer 2 (hereinafter referred to as a microcomputer). The output of the microcomputer 2 is connected to the drive means 5 for operating the compressor 4 and the drive circuit 7 for operating the compressor cooling blower 6, respectively. Also, the microcomputer 2
A discharge pipe temperature detector 8 for detecting the discharge pipe temperature of the compressor 4 is input to the.

Reference numeral 9 denotes a refrigerator main body, and a partition wall 10 divides a freezer compartment 11 into an upper portion and a refrigerating compartment 12 into a lower portion. 1
A machine room 3 is provided below the refrigerator main body 9. Here, the compressor 4 and the compressor cooling blower 6 are provided in the machine chamber 13. Reference numeral 14 is a discharge pipe of the compressor 4.

A condenser 15 is provided inside the outer wall of the refrigerator body 9. Reference numeral 16 is a cooler, 17 is a suction pipe, and the compressor 4, the discharge pipe 14, the condenser 15, a pressure reducer (not shown), the cooler 16,
The suction pipe 17 constitutes a series of refrigeration cycles.
Reference numeral 18 denotes the freezer compartment 11 and the refrigerator compartment 12 for the cooler 1
This is a blower for forcedly convection the air cooled in 6.

Then, in the temperature detector 3, the freezer 11
By detecting the temperature inside, the compressor 4 and the blower 18
Is instructed to drive.

In the machine room 13, the compressor 4 and the compressor cooling blower 6 are housed. The discharge pipe 14 and the suction pipe 17 are connected to the compressor 4. A discharge pipe temperature detector 8 for detecting the temperature is connected to the discharge pipe 14.

The operation of the refrigerator control device configured as described above will be described below with reference to the flowchart of FIG.

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 data of the microcomputer 2 is cleared and initialization is performed.

Next, in 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, a signal is output to the driving means 5 to operate the compressor 4 in step 102 to cool it. The vessel 16 performs a cooling action. At the same time, the blower 18 is operated and the cool air cooled by the cooler 16 is forcedly ventilated to the freezing compartment 11 and the refrigerating compartment 12.

Next, in step 103, a signal is output to the driving means 7 to operate the compressor cooling blower 6, and the compressor 4 is operated.
Blow to. For this reason, the temperature of the surface of the compressor 4 is lowered and the winding failure of the winding due to the deterioration of the heat radiation performance is suppressed. Then, in step 104, the discharge pipe temperature detector 8
Is, for example, 130 ° C. or lower, the process returns to step 101 and the same operation is repeated.

After that, when 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 signal of the driving means 5 is sent to stop the compressor 4 and the blower 18. Cut off. Then, in step 106, the signal of the driving means 7 is cut off so as to stop the blower 6 for cooling the compressor. After that, this action is repeated to perform a normal cooling action.

If the cooling system becomes abnormal during such a cooling operation, for example, if the compressor cooling blower 6 fails and becomes inoperable, the temperature of the surface of the compressor 4 rises and the heat radiation performance is reduced. The temperature of the discharge pipe 14 rises because the temperature of the compressed refrigerant gas becomes high due to deterioration. Therefore, if the discharge pipe temperature detector 8 is, for example, 150 ° C. or higher in step 104, the signal of the driving means 5 is shut off in step 105 to stop the compressor 4 and the blower 18. Then, returning to step 104, the discharge pipe temperature detector 8 is continued until the temperature becomes 130 ° C. or less, and seizure failure of the winding of the compressor 4 is suppressed.

[0014]

However, in the above-mentioned conventional configuration, since the compressor 4 and the blower 18 are stopped after the cooling system becomes in an abnormal state, the temperature inside the refrigerator has already risen when the user notices. There was a drawback that the food inside was corrupted. Further, there is a drawback that the compressor 4 is continuously operated and fails due to the continuous abnormal state, which makes repair difficult.

The present invention solves the problems of the prior art by notifying the user of an abnormality before the cooling system goes into an abnormal state and keeping the cooling food from spoiling while keeping the cooling performance under the condition that the compressor does not fail. The purpose is to prevent.

[0016]

To achieve this object, a control device for a refrigerator according to the present invention comprises a discharge pipe temperature detector for detecting the temperature of a discharge pipe of a compressor, and the discharge pipe temperature detector has a predetermined temperature. When the above is continued for a predetermined time, an abnormality is displayed and the operation of the compressor is stopped every predetermined time.

[0017]

In the refrigerator control device of the present invention, when the discharge pipe temperature detector of the compressor continues to be above a predetermined temperature for a predetermined time, an error is displayed and the cooling operation is continued while protecting the compressor. By keeping the cooling performance until the user notices the condition and repairing it, it is possible to prevent the compressor from failing and prevent the food from spoiling.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a control device for a refrigerator according to the present invention will be described below with reference to FIGS. In addition,
The same configurations as the conventional ones will be denoted 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 the present invention. In FIG. 1, reference numeral 19 is a control device for a refrigerator, and a drive means 22 for operating an abnormality indicator 21 for displaying an abnormality of a cooling system is connected to an output of a control microcomputer 20 (hereinafter referred to as a microcomputer). .

The abnormality indicator 21 is attached to the front surface of the door 23 of the freezer compartment 11. In addition, a control device 19 having the above-described circuit on the rear surface of the refrigerator main body 9
Is installed.

The operation of the refrigerator control device configured as described above will be described below with reference to the flowchart of FIG.

FIG. 3 is a flowchart showing the entire control program stored in the microcomputer 20. When the power is turned on, in step 200, all data of the microcomputer 20 is cleared and initialization is performed.

Next, in step 201, the state of the temperature detector 3 is read, and if the temperature of the freezer compartment 11 is higher than the set value, a signal is output to the driving means 5 to operate the compressor 4 in step 202 to cool it. The vessel 16 performs a cooling action. At the same time, the blower 18 is operated and the cool air cooled by the cooler 16 is forcedly ventilated to the freezing compartment 11 and the refrigerating compartment 12.

Next, in step 203, a signal is output to the driving means 7 to operate the compressor cooling blower 6, and the compressor 4 is operated.
Blow to. For this reason, the temperature of the surface of the compressor 4 is lowered and the winding failure of the winding due to the deterioration of the heat radiation performance is suppressed. Then, in step 204, the discharge pipe temperature detector 8
If, for example, 110 ° C. or lower, the signal of the driving means 22 is cut off in order to stop the abnormality indicator 21 in step 205, and the process returns to step 201 to repeat the same operation.

After that, if the freezing chamber 11 is cooled to a predetermined temperature, it is judged in step 201 that the temperature detector 3 is low, and in step 206, the signal of the driving means 5 is sent to stop the compressor 4 and the blower 18. Cut off. Then, in step 206, in order to stop the blower 6 for cooling the compressor, the signal of the driving means 7 is cut off, and the process proceeds to steps 204 and 205, and then returns to step 201. After that, this action is repeated to perform a normal cooling action.

If the cooling system becomes abnormal during such a cooling operation, for example, if the compressor cooling blower 6 fails and becomes inoperable, the temperature of the surface of the compressor 4 rises and the heat radiation performance is reduced. The temperature of the discharge pipe 14 rises because the temperature of the compressed refrigerant gas becomes high due to deterioration. Therefore, if the discharge pipe temperature detector 8 is, for example, 120 ° C. or higher in step 204 (this temperature is set to a temperature sufficiently lower than the temperature at which the compressor 4 fails), in step 208, for example, after continuing for 3 hours, At 209, a signal is output to the drive means 22 to operate the abnormality indicator 21.

Then, in step 210, a signal is output to the driving means 5 to operate the compressor 4 for a predetermined time (for example, 30 minutes), and the cooler 16 performs a cooling action. At the same time, the blower 18 is operated and the cool air cooled by the cooler 16 is forcedly ventilated to the freezing compartment 11 and the refrigerating compartment 12. And 30
After a lapse of minutes, the signal of the driving means 5 is cut off to stop the compressor 4 and the blower 18 for a predetermined time (for example, 30 minutes).
The control of this step 210 for a predetermined time is repeated,
The cooling condition is maintained.

Therefore, the user can notice abnormally before the food in the refrigerator is spoiled due to the abnormal cooling system,
By keeping the cooling performance until some repair procedure is performed,
Can prevent food spoilage.

[0029]

As is apparent from the above embodiments, according to the present invention, a refrigeration cycle including a compressor, a condenser, a cooler and a suction pipe, a temperature detector for detecting the temperature inside the refrigerator, and the compression A blower for cooling the compressor, which is provided in a machine room accommodating the machine and is forcibly cooled in synchronization with the operation of the compressor, and a discharge pipe temperature detector for detecting the discharge pipe temperature of the compressor. Since the discharge pipe temperature detector displays an abnormality when the temperature exceeds a predetermined temperature for a predetermined time, and a refrigerator control device that stops the operation of the compressor every predetermined time, the cooling system is in an abnormal state. Before the user notices, not only can the food spoilage be prevented by reviewing the installation environment of the refrigerator, for example, but also by switching to operation control for a predetermined time, high load operation can be continued for a long time. Failure by the compressor can be prevented, further repair action can be prevented during food spoilage until repair is very easily and quickly manageable, has a great effect.

[Brief description of drawings]

FIG. 1 is a block diagram of a control circuit of a refrigerator showing 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 rear view of a main part of a machine room of the refrigerator.

FIG. 7: Flow chart of the refrigerator

[Explanation of symbols]

 3 Temperature Detector 4 Compressor 6 Blower for Cooling Compressor 8 Temperature Detector for Discharge Pipe 13 Machine Room 14 Discharge Pipe 15 Condenser 16 Cooler 17 Suction Pipe 19 Controller 20 Microcomputer 21 Abnormality Indicator

Claims (1)

[Claims] 1. A refrigeration cycle including a compressor, a condenser, a cooler and a suction pipe, a temperature detector for detecting a temperature inside the refrigerator, and an operation of the compressor provided in a machine room accommodating the compressor. A compressor cooling blower that synchronously forcibly cools the compressor and a discharge pipe temperature detector that detects the discharge pipe temperature of the compressor are provided, and the discharge pipe temperature detector continues at a predetermined temperature or higher for a predetermined time. Then, a control device for the refrigerator that displays an abnormality and stops the operation of the compressor at predetermined intervals.