JPH03125890A - Refrigerator - Google Patents

Abstract

PURPOSE:To permit proper cooling operation by constituting a stop timer so that the operation of the same is stopped during operation of a defrosting means. CONSTITUTION:A refrigerator 1 is provided with a control circuit 11, equipped with a temperature detector 8, detecting a temperature in the refrigerator 1 to stop and/or operate a compressor 9, a defrosting means 22, starting defrosting when the operating time of the compressor is accumulated for a predetermined period of time, and a stopping timer 21, operated when the temperature in the refrigerator is higher than a predetermined temperature indicating the operation of the compressor and the compressor is being stopped, while bringing the refrigerator into an initial condition upon throw-in of a power source when the stopping timer has accumulated for more than a predetermined period of time and stopping the operation of the stopping timer during the operation of the defrosting means. Accordingly, the rottenness of foods in the refrigerator due to faulty cooling caused by remaining frost when the operation of the refrigerator is initialized by the decision of faulty cooling condition occured by the malfunction of a control circuit when the temperature in the refrigerator is increased by the stopping of the compressor during defrosting and the like may be prevented and proper cooling operation may be effected.

Description

[Detailed description of the invention] Industrial applications The present invention relates to operational control in a refrigerator.

2. Description of the Related Art Conventionally, when a refrigerator is in a non-cooling state due to abnormal operation, it has been common to adopt a configuration as shown in Japanese Patent Application Laid-Open No. 63-238380. The configuration will be explained below with reference to FIGS. 4 to 6.

In the figure, 1 is the refrigerator main body, which is a forced ventilation type refrigerator in which air cooled by a main cooler 4 housed in a cooling chamber 3 constructed in a partition wall 2 is circulated by a blower 6 to a freezing chamber 6 and to complete refrigeration. Dechiru. 8 is a temperature detector such as a thermistor that detects the temperature of the freezer compartment 6 of the refrigerator, and outputs an operation signal to operate the compressor 9 of the refrigerator. A damper thermostat 10 is provided at the entrance of the refrigerator compartment 70 to adjust the amount of cold air flowing into the refrigerator compartment 70.

Next, the control circuit will be explained.

11 is a control circuit, a microcomputer ('CPU)
12, RAM 13, ROM 14, etc., and ROM 14 stores a program for confirming the first operation and determining the next operation based on the state at that time. 15 is equipped with a freezer compartment temperature IIJ control device t; a temperature detector 8 such as a thermistor, resistors R1, R2, R3, and a comparator 1e, and the output of the fmE comparator 16 is
It is input to the control circuit 11. Further, a suction relay coil 19 for opening and closing the relay contact 18 is connected vertically to the output cover of the control circuit 11, the base of the transistor 1, and the collector of the transistor 17.

The compressor 9 is connected in series with the relay contact 18 and then connected to a power source. 22 is a defrosting means, which starts a defrosting operation and stops the operation of the compressor 9 when the operating time of the compressor 9 is accumulated for a predetermined time. Also, 21 is a stop timer,
This is to integrate the state in which the temperature detector 8 is above a set temperature and the compressor 9 is stopped for a certain period of time.

Explain the movements in power/karuta purchasing.

When the power is turned on, all data in the RAM 13 is cleared and initialized as step 1. Next, in step 2, check the state of the temperature sensor 8. For example, if the temperature of the freezing compartment 6 is higher than the set value, the temperature detector 8 of the freezing compartment 6
The resistance value RT' becomes smaller and the resistance value RT of
The potential at point A determined by resistor R1 is resistor R2,
The output of the comparator 16 which is higher than the potential at point B determined by R3 becomes .H'' and is stored in the RAM 13.

Then, in step 3, it is determined from the RAM 13 whether the temperature detector 8 has detected a temperature equal to or higher than the set temperature. At this time, if the temperature is higher than the set temperature, the RAM 13
The state of the compressor 9 is set to ON, and stored to be reset to OFF. Then, in step 5, the status of the compressor 9 is output, but since it is set to ON here, the transistor 17 is turned on, the relay coil 19 is conducted, the relay contact 18 is closed, and the compressor 9 is started. be done. Then, in step 6, the state of the temperature detector 8 is determined, and if the temperature is higher than the set temperature, the state of the compressor 9 is determined in step 7, and if it is not in the OFF state, the state of the compressor 9 is determined.
If the toe 5 is ON, the process advances to step 8 and the stop timer 21 is cleared. This process from step 2 to step 8 continues, and when the temperature of the freezing compartment 6 becomes lower than the set temperature, in step 2, the resistance value Rr of the temperature sensor 8 of the freezing compartment 6 is large, and the AX position is higher than the B potential. Therefore, the comparator 16 generates an L'' signal and stores it in the RAM 13.Then, in step 3, the RAM 13 determines that the temperature detector 8 has detected a temperature below the set temperature, and in step 9, the RAM 13 stores the state of the compressor 9 to ON. is reset and stored to be set to OFF.Then, in step 5, the state of the compressor 9 is output, but since OFF is set here, the transistor 1 is set to OFF.
The relay coil 19 is turned FF and conduction to the relay coil 19 is cut off, the relay contact 18 is opened, and the compressor 9 and the blower are stopped. Then, in step 6, the state of the temperature detector 8 is determined, and if the temperature is below the set temperature, the stop timer 21 is activated in step 8.
Clear. In the following 2, such cooling operation is repeated.

However, during such cooling operation, R
If the data of AM13 becomes abnormal, for example, even though the temperature detector 8 is above the set temperature, the status of the compressor 9 is reset to ON, set to OFF, and the compressor 9 is stopped, proceed to step 6. It is determined that the temperature is higher than the set temperature, and the process proceeds to step 7, where the state of the compressor 9 is
Since OFF is set, at 7 hoops 10,
The stop timer 21 is activated to start integration. Then, in step 11, it is determined whether the stop timer 21 has finished accumulating the predetermined time, and if it is in the process of accumulating, the process returns to step 2 and this operation is repeated. Stop timer 21 at step 11
When the integration has finished for the predetermined time, go to step 1 and store the RAM
Clear all 13 data, initialize, input and import normal data in step 2, and perform normal cooling operation again. Therefore, it is possible to prevent the compressor 9 from continuing to stop any longer and damaging the food in the refrigerator.

Problems to be Solved by the Invention However, during such cooling operation, the compressor 9
When the operating time of 1. is accumulated for a predetermined time, the defrosting means 22 is activated. Defrosting is started and the compressor 9 is stopped. During this defrosting, the temperature of the freezer compartment 6 becomes higher than the set value, the temperature detector 8 indicates that the temperature is not higher than the set temperature, and the compressor 9 is stopped, so the stop timer 21 operates and when the integration is completed for a certain period of time, However, after initialization, the cooling operation is restarted and the defrosting operation is not performed, resulting in poor cooling due to residual frost, etc.

The present invention solves the above problems and aims to provide appropriate cooling operation.

Means for Solving the Problems In order to solve the above problems, the present invention is configured to stop the operation of the stop timer while the defrosting means is in operation.

Effect: With the above-described configuration, the present invention not only restarts the correct cooling operation by turning on the power when the non-cooling state occurs due to abnormal operation, but also turns on the power when the temperature inside the refrigerator rises during defrosting. Since defrosting is performed reliably and proper cooling operation is performed, adverse effects such as spoilage of food in the refrigerator can be prevented.

EXAMPLE Hereinafter, an example of the present invention will be described with reference to FIGS. 1 to 3. Incidentally, the same configurations as those of the prior art will be given the same reference numerals, detailed explanations thereof will be omitted, and only the different achievements will be described.

The operation of such a groove bottom will be explained with reference to FIG.

When the power is turned on, as step 1, all data in the RAM 13 is cleared and initialized. Next, in step 2, the state of the temperature sensor 8 is checked, for example in the freezer compartment 6.
If the temperature of
The potential at point A determined by resistor R1 is resistor R2,
The potential at point B determined by R3 becomes higher, and the output of the comparator 16 becomes °H''9, which is stored in the RAM 13.Furthermore, in step 12, it is determined whether the weight removing means is operating, and the operation is started. If not, as step 3, RA
Based on M13, it is determined whether the temperature detector 8 has detected a temperature equal to or higher than the set temperature. At this time, if the temperature is above the set temperature, the state of the compressor 9 is stored in the RAM 13 in step 4 so as to set ON and OFF on IJ. Then, in step 6, the status of the compressor 9 is output.
Since ON is set here, transistor 1
7 turns on and relay coil 19 conducts 1) V-contact 1
8 is closed and the compressor 9 is operated. Then, in step 6, the state of the temperature detector 8 is determined, and if the temperature is above the set temperature, the state of the compressor 9 is determined at the end of the step, and if it is not in the OFF state, and if it is in the QN state, Proceed to step 8 and clear the stop timer 21. The process from step 2 to step 8 continues until the freezer compartment 6
When the temperature becomes lower than the set temperature, the resistance value RT of the temperature sensor 8 of the freezing compartment 6 increases in step 2, and the A potential becomes smaller than the B potential, so the comparator 16 generates an "L" signal and stores it in the RAM 13. do. Then, in step 3, it is determined from the RAM 13 that the temperature detector 8 has detected a temperature below the set temperature, and in step 9, the state of the compressor 9 is reset to ON and stored in the RAM 13 to be set to OFF. Then, in step 6, the state of the compressor 9 is output, but since it is set to OFF here, the transistor 17 is turned off and the relay coil 19 is turned off.
The conduction to is cut off, the relay contact 18 is opened, and the compressor 9 and the blower are stopped. Then, in step 6, the state of the temperature detector 8 is determined, and if the temperature is below the set temperature, the stop timer 21 is cleared in step 8. Thereafter, such cooling operation is repeated.

However, during such cooling operation, R
If the data of AM13 becomes abnormal, for example, even though the temperature detector 8 is above the set temperature, the status of the compressor 9 is reset to ON, set to OFF, and the compressor 9 is stopped. It is determined that the temperature is higher than the set temperature, and the step is completed, and the state of the compressor 9 is as follows.
Since OFF is set, the Stella 7''12 determines whether the defrosting means is operating, and if it is not defrosting, the stop timer 21 is operated in Step 10 to start integration.Then, in Step 11 Then, it is determined whether the stop timer 21 has finished integrating the predetermined time, and if the integration is in progress, step 2 is performed.
It returns and this operation is repeated. When the stop timer 21 finishes accumulating the predetermined time in step 11, the process goes to step 1.

All data in the RAM 13 is cleared and initialized, and from step 2, normal data is input and normal cooling operation is performed again. Therefore, it is possible to prevent the compressor 9 from stopping any further and damaging the food in the refrigerator.

Further, when the operating time of the compressor 9 is accumulated for a predetermined time during this cooling operation, the defrosting means 22 is activated.

In step 12, the process advances to step 9 and the compressor 9 is turned off. Furthermore, from step 6, the process proceeds to step 6, and when the temperature detector 8 becomes higher than the set temperature during this defrosting, the process proceeds to the stemper, where the compressor 9 is in the FF state because defrosting is in progress, and in step 13, the defrosting is performed. Since the means is operating, defrosting is completed without being initialized until the stop timer 21 is cleared in step 8, and an appropriate cooling operation is performed.

Effects of the Invention As is clear from the above description, the present invention includes a temperature detector that detects the temperature inside the refrigerator and stops the compressor, and a defrosting means that starts defrosting when the operating time of the compressor is accumulated for a predetermined time. and a stop timer that operates when the temperature inside the refrigerator is higher than a predetermined temperature that instructs the compressor to operate, and the compressor is stopped, and when the stop timer has accumulated for a predetermined time or more, the refrigerator is powered on. Since the control circuit is provided with a control circuit that sets the initial state at the time and stops the operation of the stop timer while the defrosting means is in operation, the control circuit will not malfunction when the temperature inside the refrigerator rises due to the stop of the compressor during weight removal. It is possible to prevent spoilage of food in the city due to insufficient cooling due to leftover boxes, etc. when it is determined that the system is in an uncooled state and is initialized, and it has a great effect because appropriate cooling operation is performed.

[Brief explanation of the drawing]

FIG. 1 is a flowchart of a refrigerator showing an embodiment of the present invention, FIG. 2 is a control circuit diagram of FIG. 1, FIG. 3 is a sectional view of the refrigerator, and FIG. 4 is a flowchart of a conventional example. 6th
The figure is a control circuit diagram showing a conventional example, and FIG. 6 is a sectional view of the same refrigerator. 8...Temperature detector, 9...Compressor, 21...Stop timer, 22...Defrosting means.

Claims (1)

[Claims] a temperature detector that detects the temperature inside the refrigerator and stops the compressor; a defrosting means that starts defrosting when the operating time of the compressor is accumulated for a predetermined time; and a temperature detector that detects the temperature inside the refrigerator and stops the operation of the compressor; and a stop timer that operates when the compressor is stopped, and when the stop timer has accumulated a predetermined time or more, the refrigerator is brought into the initial state when the power is turned on, and while the defrosting means is in operation, A refrigerator including a control circuit that stops the operation of the stop timer.