JPH0510654A - Defrosting control device of refrigerator - Google Patents

Abstract

PURPOSE:To hold an integrated value of an operating time of a compressor even in the case that a power failure occurs, to get a proper defrosting period within a short period of time in order to correct the integrated value in response to an indoor temperature when the power supply is turned on, and to prevent always an amount of frosting of a cooler from being remarkably increased. CONSTITUTION:A control device is comprised of a timer means 1 for integrating an operating of a compressor and holding its content even in the case of power failure and a temperature sensing means 4 for sensing a temperature of the cooler. In addition, when the power supply is turned on, an indoor controlling temperature and a detected temperature of the temperature sensing means 4 are compared to each other and in the case that the detected temperature is within a range predetermined by the indoor control temperature, the integrated value of the timer means 1 is continued as it is, and in another case a correction is carried out for increasing the subtracted value of the integrated time in proportion to a temperature difference and then the first calculation processing part 5 for continuing the calculation is provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a defrosting control device for a refrigerator in which the defrosting operation of the cooler is performed every time the integrated value of the operating time of the compressor reaches a preset defrosting set time. .

[0002]

2. Description of the Related Art In recent years, a standard defrosting control device for a refrigerator uses a microcomputer for defrosting operation. For example, there is a defrost control device for a refrigerator disclosed in Japanese Patent Application Laid-Open No. 1-137184. In the refrigerator configured to perform the defrosting operation of the cooler at each predetermined defrosting set time based on the integrated value of the operating time of the compressor, the temperature detecting means for detecting the temperature of the cooler is provided, and the refrigerator is used after the power is turned on. Control for determining the frosting amount of the cooler based on the temperature change rate of the temperature detecting means, and changing the defrosting set time in the first defrosting cycle based on the frosting amount according to the detected frosting amount stage. It is also configured such that means is provided.

[0003]

However, in the above configuration, it takes a long time to make a determination because the amount of frost formed on the cooler is detected based on the temperature change rate of the temperature detecting means.
Further, there is a problem that a highly accurate temperature detection means and an AD conversion circuit are required to shorten the determination time.

In view of the above problems, the present invention provides a defrosting control device for a refrigerator that can obtain an appropriate defrosting cycle in a short time even when a power failure occurs.

[0005]

In order to solve the above-mentioned problems, a defrosting control device for a refrigerator according to the present invention includes timer means for accumulating the operating time of a compressor and holding the contents even during a power failure, and a defrosting device for a cooler. Defrosting means for performing frosting, defrosting control section for controlling the defrosting means, temperature detecting means for detecting the temperature of the cooler, and predetermined defrosting set time based on the integrated time of the timer means The defrosting control unit is controlled periodically for defrosting every time, and when the power is turned on, the temperature inside the refrigerator is compared with the temperature detected by the temperature detecting means to detect the temperature within a predetermined range from the temperature inside the refrigerator. If it is within the range, the integrated value of the timer means is continuously integrated as it is, and if the difference between the detected temperature and the internal control temperature is out of a predetermined range, the subtraction value of the integrated time is proportional to the temperature difference. Continue correction by increasing the correction Those having a structure that the first arithmetic processing unit that.

Further, timer means for accumulating the operating time of the compressor and holding the contents even in case of power failure, defrosting means for defrosting the cooler, defrosting control section for controlling the defrosting means, and the cooling Temperature detecting means for detecting the temperature of the vessel, setting means for setting a temperature difference range for holding the integrated value of the timer means, and a cycle for each predetermined defrosting set time based on the integrated time of the timer means The defrosting control unit is controlled to defrost, and when the power is turned on, the internal control temperature and the temperature detected by the temperature detection unit are compared, and the difference between the detected temperature and the internal control temperature is determined by the setting unit. If the difference between the detected temperature and the internal control temperature is out of the range defined by the setting means, the subtraction value of the integration time is set to the temperature In proportion to the difference Those having a structure of the second arithmetic processing unit that continues to integrate performs a listening corrected.

[0007]

According to the present invention, the integrated value of the operating time of the compressor is held even when a power failure occurs due to the above configuration, and when the power is turned on, the control temperature inside the refrigerator is compared with the temperature detected by the temperature detecting means to detect the temperature and control inside the refrigerator. If the temperature difference is within a predetermined range or within the range determined by the setting means, the integrated value of the timer means is continuously integrated as it is, and the difference between the detected temperature and the internal control temperature is predetermined. If it is out of the specified range or out of the range determined by the setting means, an appropriate defrost cycle can be obtained in a short time by correcting the subtraction value of the integrated time so that the temperature difference is proportionally increased. The start time of driving will not be delayed,
It is possible to prevent the amount of frost formed on the cooler from increasing abnormally.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A defrosting control apparatus for a refrigerator according to an embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram of a defrost control device for a refrigerator according to the first embodiment of the present invention. In FIG. 1, reference numeral 1 is a timer means for accumulating the operating time of the compressor and holding the content even in the event of a power failure. Reference numeral 2 is a defrosting unit that defrosts the cooler, 3 is a defrosting control unit that controls the defrosting unit 2, and 4 is a temperature detecting unit that detects the temperature of the cooler.

Numeral 5 is the defrosting control section 3 periodically based on the accumulated time of the timer means 1 every predetermined defrosting set time.
Is controlled to defrost, and when the power is turned on, the internal control temperature is compared with the detection temperature of the temperature detecting means 4, and if the difference between the detected temperature and the internal control temperature is within a predetermined range, the timer means is set. If the difference between the detected temperature and the internal control temperature is outside the predetermined range, the integrated value of 1 is continued and integrated so that the subtraction value of the integrated time is increased in proportion to the temperature difference. Is provided with a configuration of a first arithmetic processing unit for continuing.

The operation of the defrosting control device for a refrigerator constructed as above will be described below with reference to the flowchart of FIG. First, when the power is turned on, in step 1, the first arithmetic processing unit 5 takes in the current temperature of the cooler from the temperature detecting means 4. In step 2, the first arithmetic processing unit 5 compares the difference between the internal control temperature and the detected temperature, and if the result is within a predetermined range, proceeds to step 4 and otherwise proceeds to step 3. . In step 3, the first arithmetic processing unit 5 subtracts the integrated time of the timer means 1 by a predetermined time proportional to a predetermined temperature difference, writes it in the timer means 1, and proceeds to step 4.

With the above, the initial processing upon power-on is completed, and at step 4, the first arithmetic processing section 5 reads the integrated time of the timer means 1 and sets the timer means 1 to the set time for defrosting.
It is determined whether the integrated time of has reached the defrosting set time. If the accumulated time of the timer means 1 has reached the set time for defrosting, the operation proceeds to step 5, and if the accumulated time of the timer means 1 has not reached the set time for defrosting, the operation proceeds to step 4. Wait until the progress time has elapsed. In step 5, the first arithmetic processing section 5 resets the integrated time of the timer means 1 to zero. In step 6, the first calculation processing section 5 controls the defrosting control section 3 that controls the defrosting means 2, operates the defrosting means, controls the slow defrosting operation, and proceeds to step 4.

As described above, according to the first embodiment, the timer means 1 for accumulating the operating time of the compressor and holding the contents even during a power failure, the defrosting means 2 for defrosting the cooler,
Defrost control section 3 for controlling the defrosting means 2, temperature detecting means 4 for detecting the temperature of the cooler, and the timer means 1
The defrosting control unit 3 is periodically controlled based on the accumulated time of the defrosting to control the defrosting, and when the power is turned on, the internal control temperature and the temperature detected by the temperature detecting unit 4 are compared. If the difference between the detected temperature and the in-compartment control temperature is within a predetermined range, the integrated value of the timer means 1 is continued and integrated, and the difference between the detected temperature and the in-compartment control temperature is predetermined. If it is out of the range, it is appropriate in a short time even when a power failure occurs by providing the first arithmetic processing unit that corrects the subtraction value of the integration time to increase it in proportion to the temperature difference and continues the integration. It is possible to obtain a different defrosting cycle, the delay in the start time of the defrosting operation is prevented, and it is possible to prevent a decrease in cooling efficiency.

Next, a defrosting control device for a refrigerator according to a second embodiment will be described with reference to the drawings. The same components as those in the first embodiment are designated by the same reference numerals and detailed description thereof will be omitted.

FIG. 3 is a block diagram of a defrost control device for a refrigerator according to the second embodiment of the present invention. In FIG.
Reference numeral 6 designates a setting means 6 for setting a temperature difference range for holding the integrated value of the timer means, and the defrost control section periodically based on the integrated time of the timer means 1 every predetermined defrosting set time. 3 to control defrosting, and when the power is turned on, the control temperature inside the refrigerator is compared with the temperature detected by the temperature detecting means, and the difference between the detected temperature and the control temperature inside the refrigerator is the range of the temperature difference set by the setting means 6. If it is within the range, the integrated value of the timer means 1 is continuously integrated as it is, and if the difference between the detected temperature and the internal control temperature is outside the range of the temperature difference set by the setting means 6, the integration time is subtracted. It is provided with a configuration of a second arithmetic processing unit 7 for performing correction for increasing the value in proportion to the temperature difference and continuing integration.

The operation of the defrosting control device for a refrigerator constructed as above will be described below with reference to the flowchart of FIG.

First, when the power is turned on, at step 7, the second arithmetic processing section 7 takes in the current temperature of the cooler from the temperature detecting means 4. In step 8, the second arithmetic processing unit 7 reads the temperature difference range determined by the setting unit 6. In step 9, the second arithmetic processing unit 7 takes the difference between the internal control temperature and the detected temperature, and if the result is within the range of the temperature difference determined by the setting means 6, the second arithmetic processing unit 7 should proceed to step 11. Step 1
Go to 0. In step 10, the second arithmetic processing unit 7
The integrated time of the timer means 1 is subtracted by a predetermined time which is proportional to the temperature difference between the internal control temperature and the detected temperature, the timer means 1 is written, and the process proceeds to step 11.

With the above, the initial processing upon power-on is completed, and at step 11, the second arithmetic processing section 7 causes the timer means 1 to operate.
The integrated time is read and it is determined whether the integrated time of the timer means 1 has reached the defrosting set time. Here, if the accumulated time of the timer means 1 has reached the set time for defrosting, proceed to step 12, and if the accumulated time of the timer means 1 has not reached the set time for defrosting, proceed to step 10. Wait for the accumulated time. In step 12, the second arithmetic processing unit 7 resets the integrated time of the timer means 1 to zero. In step 13, the second arithmetic processing unit 7 controls the defrosting unit 2 to perform the defrosting control unit 3
Is controlled to operate the defrosting means to control the slow defrosting operation and proceed to step 11.

As described above, according to the second embodiment, the timer means 1 for accumulating the operating time of the compressor and holding the contents even in the case of power failure, and the defrosting means 2 for defrosting the cooler
A defrosting control unit 3 that controls the defrosting unit 2, a setting unit 6 that sets a temperature difference range that holds the integrated value of the timer unit, and a predetermined amount based on the integrated time of the timer unit 1. The defrost control unit 3 is periodically controlled for defrosting at every set time for defrosting, and when the power is turned on, the control temperature inside the refrigerator is compared with the detection temperature of the temperature detecting means to detect the temperature and the control temperature inside the refrigerator. Is within the range of the temperature difference determined by the setting means 6, the integrated value of the timer means 1 is continued and integrated, and the difference between the detected temperature and the in-chamber control temperature is set by the setting means 6. When the temperature difference is out of the specified range, the second arithmetic processing unit 7 that continues the integration by performing the correction to increase the subtraction value of the integration time in proportion to the temperature difference is provided in the case of a power failure. The proper defrost cycle in a short time A reduction in starting time prevents the delayed cooling efficiency of the defrosting operation can be prevented.

[0019]

As described above, the present invention controls the timer means for accumulating the operating time of the compressor and holding the contents even in the case of power failure, the defrosting means for defrosting the cooler, and the defrosting means. Defrosting control section, temperature detecting means for detecting the temperature of the cooler, and the defrosting control section for periodically controlling the defrosting control section for each predetermined defrosting set time based on the integrated time of the timer means. When the power is turned on, the internal control temperature is compared with the detection temperature of the temperature detecting means, and if the difference between the detected temperature and the internal control temperature is within a predetermined range, the integrated value of the timer means is continued as it is. The first calculation that continues the integration by performing the integration, and if the difference between the detected temperature and the internal control temperature is out of the predetermined range, the subtraction value of the integration time is increased in proportion to the temperature difference. By providing a processing unit, power failure Even when it occurs, an appropriate defrost cycle can be obtained in a short time, the start timing of the defrost operation will not be delayed, and a decrease in cooling efficiency can be prevented.

Further, timer means for accumulating the operating time of the compressor and holding the contents even in case of power failure, defrosting means for defrosting the cooler, defrosting control section for controlling the defrosting means, A temperature detecting means for detecting the temperature of the cooler, a setting means for setting a temperature range for holding the integrated value of the timer means, and a cycle for every predetermined defrosting set time based on the integrated time of the timer means. The defrosting control unit is controlled to defrost, and when the power is turned on, the internal control temperature is compared with the temperature detected by the temperature detecting means, and the difference between the detected temperature and the internal control temperature is set by the setting means. If it is within the temperature difference range, the integrated value of the timer means is continuously integrated as it is, and if the difference between the detected temperature and the internal control temperature is outside the temperature difference range set by the setting means, the integration time Subtract the temperature difference By providing a second processing unit to continue the integration performs a correction to increase by example,
Even if a power failure occurs, an appropriate defrost cycle can be obtained in a short time, the start time of the defrost operation will not be delayed, cooling efficiency can be prevented from lowering, and the temperature difference range for correction can be adjusted. By setting it, it is possible to obtain a more appropriate defrost cycle for the defrosting operation in response to changes in the contents and capacity in the refrigerator.

[Brief description of drawings]

FIG. 1 is a block diagram of a defrosting control device for a refrigerator according to a first embodiment of the present invention.

FIG. 2 is a flowchart of a defrosting control device for a refrigerator according to the first embodiment of the present invention.

FIG. 3 is a block diagram of a defrost control device for a refrigerator according to a second embodiment of the present invention.

FIG. 4 is a flowchart of a defrosting control device for a refrigerator according to a second embodiment of the present invention.

[Explanation of symbols]

1 timer means 2 defrosting means 3 Defrost control section 4 Temperature detection means 5 First arithmetic processing unit 6 setting means 7 Second arithmetic processing unit

Claims (2)

[Claims] 1. A timer means for accumulating the operating time of a compressor and holding the contents even during a power failure, a defrost means for defrosting a cooler, a defrost control section for controlling the defrost means, Temperature detection means for detecting the temperature of the cooler, and performs defrosting by periodically controlling the defrosting control unit for each predetermined defrosting set time based on the integrated time of the timer means,
When the power is turned on, the internal control temperature is compared with the temperature detected by the temperature detecting means. If the difference between the detected temperature and the internal control temperature is within a predetermined range, the integrated value of the timer means is continuously integrated as it is. If the difference between the detected temperature and the in-compartment control temperature is outside the predetermined range, a correction is made to increase the subtraction amount of the integration time in proportion to the temperature difference, and the first arithmetic processing unit that continues the integration. A defrosting control device for a refrigerator characterized by being provided. 2. A setting means for setting a temperature difference range for holding an integrated value of the timer means, and a cycle for every predetermined defrosting set time based on the integrated time of the timer means. The defrosting control unit is controlled to defrost, and when the power is turned on, the control temperature inside the refrigerator is compared with the temperature detected by the temperature detecting means, and the difference between the detected temperature and the control temperature inside the refrigerator is within the range set by the setting means. If it is within the range, the integrated value of the timer means is continuously integrated as it is, and if the difference between the detected temperature and the internal control temperature is out of the range set by the setting means, the subtraction value of the integrated time is used as the temperature difference. A defrosting control device for a refrigerator, comprising: a second arithmetic processing unit that performs a proportionally large correction and continues integration.