JPH08271109A - Control device for refrigerator - Google Patents

Abstract

PURPOSE: To perform a low speed rotation of a compressor and to prevent a foodstuf from being decayed under poor cooling due to a seizure of a winding held in a compressor by a method wherein an operation of the compressor is performed under a low speed rotation in the case that a blower for the compressor can not be operated due to trouble or cutting of wire or the like. CONSTITUTION: A control device for refrigerator is provided with a blower 7 for a compressor and a rotation sensing means 12. When the blower for the compressor is not operated, a compressor 6 is operated under a low speed rotation with a compressor rotating means 24. When the blower for the compressor is not operated, this state is indicated by an alarm means to an alarm device.

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 compressor, and more particularly to a refrigerator in which the compressor is cooled by a blower.

[0002]

2. Description of the Related Art In recent years, in order to effectively use the space in a refrigerator, as shown in Japanese Patent Laid-Open No. 2-136669, the space of a machine room for accommodating a compressor of a refrigeration cycle is made small and compressed. In many cases, a blower for compressor is installed near the machine to keep the cooling capacity by suppressing the temperature rise in the machine room by stirring air. The configuration will be described below with reference to FIGS. 5 and 6.

In FIG. 5, reference numeral 1 denotes a refrigerator main body, which is divided by a partition wall 2 into a freezer compartment 3 at an upper portion and a refrigerating compartment 4 at a lower portion. A machine room 5 is provided at the bottom of the refrigerator body 1. A compressor 6 is provided in the machine room 5 together with a compressor blower 7. 8 is a condenser,
It is provided inside the outer wall of the refrigerator body 1. Reference numeral 9 is a cooler, 10 is a suction pipe, and the compressor 6, the condenser 8,
The decompressor (not shown), the cooler 9, and the suction pipe 10 constitute a series of refrigeration cycles. Reference numeral 11 denotes a blower for forcedly convection the air cooled by the cooler 9 into the freezer compartment 3 and the refrigerating compartment 4.

Reference numeral 12 is an internal temperature sensor. 1
Reference numeral 3 denotes an inside temperature detecting means for detecting the temperature of the freezer compartment 3 by the inside temperature sensor 12. Reference numeral 14 is an outside air temperature sensor. Reference numeral 15 is an outside air temperature detecting means for detecting the outside air temperature by the outside air temperature sensor 14. Reference numeral 16 is an in-compartment temperature determination means that determines whether the in-compartment temperature detected by the in-compartment temperature detection means 13 is within a set temperature range.

Reference numeral 17 denotes an outside air temperature judging means for judging whether the outside air temperature detected by the outside air temperature detecting means 15 is within a set temperature range. Reference numeral 18 is a compressor driving means for driving the compressor 6.

Reference numeral 19 denotes a compressor blower control means for controlling the operation stop of the compressor blower 7 in accordance with the inside temperature determination means 16 and the outside air temperature determination means 17. Reference numeral 20 is a compressor blower driving means for driving the compressor blower 7 based on the result of the compressor blower control means 19.

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

First, in step 100, the inside temperature detecting means 13 detects the temperature inside the freezer compartment 3 by the inside temperature sensor 12. Next, in step 101, the in-compartment temperature determination means 16 determines whether the temperature is higher or lower than a set temperature (for example, -20 ° C.). If the temperature is higher, the process proceeds to step 102. If the in-compartment temperature is lower than the set temperature, Go to step 103. At step 102, the compressor 6 is operated by the compressor driving means 18, and the routine proceeds to step 104. Moreover, in step 103, the compressor 6 is stopped by the compressor driving means 18, and the process proceeds to step 107. In step 104, the outside air temperature detecting means 15 detects the temperature of outside air by the outside air temperature sensor 14.

Next, in step 105, the outside air temperature determining means 17 determines whether the temperature is higher or lower than a set temperature (for example, 20 ° C.). If it is higher, the process proceeds to step 106, and if the outside air temperature is lower than the set temperature, Go to step 107.

In step 106, the compressor blower control means 19 causes the inside temperature determination means 16 to have a high inside temperature, and the outside air temperature determination means 17 causes the outside air temperature to be high. Operate the blower 7.

In step 107, the compressor blower control means 19 has the inside temperature determination means 16 having a high inside temperature, and the outside air temperature determination means 17 has a low outside air temperature. The blower 7 is stopped.

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

[0013]

However, in such a configuration, when the compressor blower cannot operate due to a failure of the compressor blower or a disconnection of the wiring, the compressor has insufficient cooling air flow and the compressor does not have enough air flow. Will become hot and will cause winding failure due to deterioration of heat dissipation performance.

The present invention solves the conventional problems.
The purpose is to prevent the failure of the compressor even when the blower for the compressor fails.

[0015]

In order to solve the above-mentioned problems, a control device for a refrigerator according to the present invention comprises an internal temperature detecting means for detecting the internal temperature, and a compressor blower for forcibly cooling the compressor. A rotation detecting means for detecting the rotation of the compressor blower, and a compressor rotating means for operating the compressor at a low speed when the compressor blower detects a stop from the rotation detecting means when an operation command is issued. .

[0016] Further, it is provided with an alarm device and an alarm means for issuing an alarm when the rotation of the compressor blower is detected by the rotation detecting means when an operation command is issued.

[0017]

With the above-described structure, the control device for a refrigerator of the present invention detects the rotation of the compressor blower when the compressor blower is operating and outputs it, and when the compressor blower is not rotating, operates the compressor at a low speed. Therefore, it is possible to perform the operation control so that the heat radiation performance is not deteriorated and the food in the refrigerator is not damaged before the winding is baked.

Further, the rotation of the compressor blower is detected, and when it is not rotating, the compressor winding is burned, and the user is informed before the cooling failure occurs, and the defective portion is repaired. Can be done.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below 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, detailed description thereof will be omitted, and only different portions will be described.

Reference numeral 21 is a rotation detecting means for detecting the operating state of the compressor blower 7. 22 is the rotation detecting means 2
The state detected by 1 is rotation determination means for determining rotation or stop. A compressor control unit 23 controls the operating state of the compressor 6 by means of the internal temperature determination unit 16 and the rotation determination unit 22. Reference numeral 24 is a compressor rotating means for operating the compressor 6 at normal rotation or low speed rotation.

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

In step 105, the outside air temperature determining means 17 determines whether the temperature is higher or lower than the set temperature (for example, 20 ° C.). If the temperature is higher, the process proceeds to step 106. If the outside air temperature is lower than the set temperature, the process proceeds to step 200. move on. In step 106, the compressor blower control means 19 has the inside temperature determination means 16 having a high inside temperature, and the outside air temperature determination means 17 has a high outside air temperature. Therefore, the compressor blower driving means 20 causes the compressor blower 7 to operate. To drive. Step 2
At 00, the inside air temperature is determined by the inside air temperature determination means 16 by the compressor blower control means 19, and the outside air temperature is low by the outside air temperature determination means 17. Therefore, the compressor blower drive means 20 drives the compressor blower 7 Stop, step 204
Proceed to.

In step 201 following step 106, the rotation detecting means 21 detects the operating (rotating) state of the compressor blower 7. Next, in step 202, the rotation determining means 22 determines whether the compressor blower 7 is rotating or in a stopped state. When the compressor blower 7 is in the stop state, the process proceeds to step 203, and when the compressor blower 7 is in the rotating state, step 204 is performed. Proceed to.

In step 203, when the compressor blower 7 is stopped, the compressor rotating means 24 operates the compressor 6 at a low speed, and the compressor driving means 18 operates the compressor 6 at a low speed. In step 204, since the compressor blower 7 is rotating normally, the compressor rotating means 24 operates the compressor 6 at normal rotation, and the compressor driving means 1
At 8, the compressor 6 is operated normally. In step 205,
The compressor 6 is stopped by the compressor rotating means 24 and the compressor 6 is stopped by the compressor driving means 18.

Therefore, in this embodiment, when the blower for a compressor is instructed to operate but is not rotating due to a failure or a break in the wiring, it is detected by the rotation detecting means that the compressor is operated at a low speed. It is possible to prevent the compressor windings from being burnt out by operating at.

Next, a refrigerator control device according to another embodiment will be described with reference to FIGS. The same components as those of the conventional and the previous embodiments are designated by the same reference numerals, detailed description thereof will be omitted, and only different portions will be described.

Reference numeral 25 is an alarm means for driving an alarm device 26 such as a buzzer or an LED installed on the door or the like of the refrigerator body 1.

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

In step 106, the compressor blower control means 19 has the inside temperature determination means 16 with a high inside temperature, and the outside air temperature determination means 17 has a high outside air temperature. The air blower 7 is operated and the process proceeds to step 201. In step 201, the rotation detection means 21 detects the operating (rotating) state of the compressor blower 7. Next, at step 202, the rotation determining means 22 determines whether the compressor blower 7 is in a rotating or stopped state. When the compressor blower 7 is in the stop state, the process proceeds to step 300, and when the compressor blower 7 is in the rotating state, step 100 is performed. Return to and repeat the cycle.

In step 300, the compressor blower driving means 20 operates the compressor blower 7, but the rotation determining means 22 determines that the compressor blower 7 is not operating (rotating), and the compressor blower 7 fails. Alternatively, it is considered that there is an abnormality such as disconnection of the wiring, and the alarm means 25 outputs an alarm so that the alarm device 26 gives an alarm.

Therefore, in this embodiment, when the blower for the compressor is instructed to operate but is not rotating due to a failure or a break in the wiring, the rotation detecting means detects that it is stopped, and the alarm means gives an alarm. It can be output to the device and notified to the user to prevent the compressor winding from being burned.

[0032]

As described above, according to the control device for a refrigerator of the present invention, the compressor blower is in a state in which it cannot be operated (rotated) due to a failure or disconnection of wiring, and the compressor winding has a seizure compressor. A rotation detection means for detecting the rotation of the compressor blower, which damages the food in the refrigerator and a failure, and a low speed operation of the compressor when the compressor blower detects a stop from the rotation detection means at the time of the operation command. By including the compressor rotating means for performing the above, it is possible to suppress heat radiation of the compressor by operating the compressor at a low speed, prevent the baking of the winding, and prevent the food in the refrigerator from being damaged.

Further, it is possible that the blower for the compressor cannot be operated (rotated) due to a failure or disconnection of the wiring, the winding of the compressor is burned, the compressor is also damaged, and the food in the refrigerator is damaged.
By providing a rotation detection unit that detects the rotation of the compressor blower, an alarm device, and an alarm unit that issues an alarm when the compressor blower detects a stop from the rotation detection unit at the time of an operation command, the compressor The user can be informed before the windings burn.

[Brief description of drawings]

FIG. 1 is a block diagram of a control device for a refrigerator showing an embodiment of the present invention.

FIG. 2 is a flowchart in FIG.

FIG. 3 is a block diagram of a control device for a refrigerator showing another embodiment of the present invention.

FIG. 4 is a flowchart in FIG.

FIG. 5 is a block diagram of a conventional refrigerator control device.

FIG. 6 is a flowchart in FIG.

[Explanation of symbols]

 5 Machine room 6 Compressor 7 Compressor blower 8 Condenser 9 Cooler 10 Suction pipe 13 In-compartment temperature detecting means 21 Rotation detecting means 24 Compressor rotating means 25 Alarm means 26 Alarm device

Claims (2)

[Claims] 1. A refrigeration cycle including a compressor, a condenser, a cooler, and a suction pipe, an in-compartment temperature detecting means for detecting an in-compartment temperature, and a compressor provided in a machine room for accommodating the compressor. When a blower for a compressor that forcibly cools the compressor in synchronization with the operation, a rotation detecting unit that detects the rotation of the blower for the compressor, and a stop of the blower for the compressor is detected by the rotation detecting unit at the time of the operation command, A control device for a refrigerator, comprising: a compressor rotating unit that operates the compressor at a low speed. 2. The control device for a refrigerator according to claim 1, further comprising an alarm device and an alarm means for issuing an alarm when the rotation detecting means detects a stop of the blower for a compressor.