JP2006329551A - Defrosting control device for refrigerator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve a problem of having an adverse effect on food due to a temperature rise in a refrigerator caused by defrosting control because the same defrosting control as the case of a normal cooling cycle is performed even when no frost is formed on a cooler due to the degradation, a refrigerant leakage, or the like of a cooling system. <P>SOLUTION: This defrosting control device for the refrigerator comprises: a current carrying time counter 20 for a defrosting heater; a current carrying time determining means 21; first temperature setting 23 of a temperature determining means; a stop counter 19 for integrating the stop time of a compressor; and a stop time determining means 22. When the time of the current carrying time counter 20 is the set time or less and the time of the stop counter 19 is the set time or less, it is determined that cooling performance is degraded due to the occurrence of degradation, refrigerant leakage, or the like of the cooling system, and control is performed to lower the set temperature of the temperature determining means for the next defrosting control, thereby attaining control of suppressing the temperature rise in the refrigerator not to have adverse effect on food. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to defrosting control of a refrigerator.

  Conventionally, defrosting control of a refrigerator cools each chamber by a compressor and a cooler, and after the operation of the compressor is stopped, the defrosting heater is energized to remove the frost attached to the cooler (for example, refer to Patent Document 1). .

  Hereinafter, the conventional defrosting control of the refrigerator will be described with reference to the drawings.

  FIG. 3 is a block diagram of a conventional refrigerator defrost control device. FIG. 4 is a flowchart of a conventional refrigerator defrosting control device. As shown in FIG. 3, the freezer compartment 2 in the refrigerator body 1 is partitioned by a heat insulating wall 3 and a freezer compartment door 4. The freezer compartment door 4 is fixed to the refrigerator main body 1 by a hinge 5. 6 is a compressor and 7 is a cooler. 8 is a defrosting heater, and 9 is a cooler temperature detector for sensing the temperature of the cooler 7. Reference numeral 10 denotes an internal temperature detector that senses the temperature of the freezer compartment. Reference numeral 11 denotes compressor operation means for driving the compressor 6, and 12 denotes an operation timer for integrating the operation time of the compressor. Reference numeral 13 denotes a freezer compartment temperature detection means for detecting the temperature of the freezer compartment sensed by the internal temperature detector 10, and reference numeral 14 denotes a temperature detected by the freezer compartment temperature detector means 13 that is equal to or higher than a set temperature (for example, −20 ° C.). It is the internal temperature determination means which determines these. Reference numeral 15 denotes compressor operation time determination means, which is up when the time of the operation timer 12 reaches a set time (for example, 8 hours). Reference numeral 16 denotes defrost heater driving means for driving the defrost heater 8, and reference numeral 17 denotes cooler temperature detecting means for detecting the temperature detected by the cooler temperature detector 9. Reference numeral 18 is composed of temperature determination means for determining whether the temperature detected by the cooler temperature detection means 17 is equal to or higher than a set temperature (for example, 10 ° C.).

  About the defrost control apparatus of the refrigerator comprised as mentioned above, the operation | movement is demonstrated below.

First, in step 1, the compressor operation means 11 drives the compressor 6, and in step 2, the operation timer 12 starts. Next, in step 3, the internal temperature determination means 14 determines whether or not the temperature detected by the freezer temperature detection means 13 is equal to or lower than a set temperature (for example, -20 ° C.). The operation means 11 stops the compressor 6, stops the operation timer 12 in step 5, and returns to step 3. If the temperature detected by the freezer temperature detecting means 13 at the internal chamber temperature detecting means 14 in step 3 is equal to or higher than a set temperature (for example, −20 ° C.), the process proceeds to step 6 and the compressor operating time determining means 15 times up the operation timer 12. (For example, 8 hours). If the time is up, the process proceeds to step 7. If the time is not up, the process returns to step 2. In step 7, the compressor 6 is stopped by the compressor operating means 11, and the cooling cycle is completed. In step 8, the defrost heater driving means 16 energizes the defrost heater 8 and enters defrost control. Next, in step 9, if the temperature detected by the temperature determination means 18 and the cooler temperature detection means 17 is equal to or higher than a set temperature (for example, 10 ° C.), the process proceeds to step 10 where the defrost heater driving means 16 stops energization of the defrost heater 8. Return to step 1. The refrigerator repeatedly performs this refrigeration cycle and defrost control.
Japanese Examined Patent Publication No. 2-53707

  However, in the above conventional configuration, even if the chiller is not defrosted due to deterioration of the cooling system, refrigerant leakage, etc., the same defrosting control as in the normal cooling cycle is performed. As a result, the temperature rises and the food is adversely affected.

  The present invention solves the above-described conventional problems. When the chiller is not frosted due to deterioration of the cooling system, refrigerant leakage, etc., and the compressor stop time is short, the set temperature of the temperature determination means for the defrost control is set. An object of the present invention is to provide a refrigerator that suppresses the temperature rise in the lowered refrigerator cabinet and does not adversely affect food.

  In order to solve the above conventional problems, the defrosting control device of the refrigerator of the present invention determines that the frost attached to the cooler is extremely small if the defrosting control time ends in a short time (for example, 10 minutes) or less, And if the stop time of a compressor is a short time (for example, 1 hour) or less, it is set as control (for example, 0 degreeC) which lowers the setting temperature of the temperature determination means of the next defrost control.

  As a result, when the frost in the cooler is not attached due to deterioration of the cooling system, refrigerant leakage, etc., the set temperature of the defrosting control temperature judgment means is lowered, so that the refrigerator that suppresses the temperature rise in the refrigerator cabinet and does not adversely affect foods. Will be provided.

  If the defrosting control time of the refrigerator of the present invention is finished in a short time (for example, 10 minutes) or less and the stop time of the compressor is short (for example, 1 hour) or less, the cooling system can be deteriorated. It is judged that there is extremely little frost on the cooler due to refrigerant leakage, etc., and the temperature setting means of the next defrost control is lowered to suppress the temperature rise in the refrigerator cabinet and not adversely affect the food Can be in control.

  The invention according to claim 1 is a compressor operation means for operating a compressor, an operation timer for integrating the operation time of the compressor, and a compressor operation time determination for determining whether the integration time of the operation timer is equal to or greater than a set time. Means, an internal temperature detection means for detecting the temperature of the freezer compartment, an internal temperature determination means for determining whether the temperature detected by the internal temperature detection means is equal to or higher than a set temperature, and a stop time of the compressor. Stop counter for integrating, stop time determining means for determining whether the stop counter is equal to or longer than a set time, and driving the defrost heater after the compressor operating time determining means determines that the accumulated time of the operation timer is equal to or longer than the set time Defrosting heater driving means, energization time counter for counting the energization time of the defrosting heater, and the temperature of the cooler. A cooler temperature detecting means, a temperature determining means for determining whether the temperature detected by the cooler temperature detecting means is equal to or higher than a set temperature, and an energization time determination for determining whether the energization time counter is equal to or higher than a set time. Means for determining the energization time of the defrosting heater by the energization time determination means is less than or equal to a set time, and setting the accumulated time of the stop counter for accumulating the stop time of the compressor If it is less than the time, the judgment temperature of the next temperature judgment means is lowered, and the temperature rise in the refrigerator can be suppressed and control can be performed without adversely affecting the food.

  According to a second aspect of the present invention, there is provided a compressor operation means for operating a compressor, an operation timer for integrating the operation time of the compressor, and a compressor operation time determination for determining whether the integration time of the operation timer is equal to or greater than a set time. Means, an internal temperature detection means for detecting the temperature of the freezer compartment, an internal temperature determination means for determining whether the temperature detected by the internal temperature detection means is equal to or higher than a set temperature, and a stop time of the compressor. Stop counter for integrating, stop time determining means for determining whether the stop counter is equal to or longer than a set time, and driving the defrost heater after the compressor operating time determining means determines that the accumulated time of the operation timer is equal to or longer than the set time Defrosting heater driving means, energization time counter for counting the energization time of the defrosting heater, and the temperature of the cooler. A cooler temperature detecting means, a temperature determining means for determining whether the temperature detected by the cooler temperature detecting means is equal to or higher than a set temperature, and an energization time determination for determining whether the energization time counter is equal to or higher than a set time. Means for determining the energization time of the defrosting heater by the energization time determination means is less than or equal to a set time, and setting the accumulated time of the stop counter for accumulating the stop time of the compressor If it is less than the time, the control for stopping the next defrosting control is performed, and the temperature rise in the refrigerator can be suppressed and the control can be performed without adversely affecting the food.

  Invention of Claim 3 WHEREIN: In invention of Claim 1 or 2, the time of the said electricity supply time counter which counts the electricity supply time of the said defrost heater with the said electricity supply time determination means is below setting time, and If the integration time of the stop counter that integrates the stop time of the compressor is less than or equal to the set time, the control is performed to lower the set temperature of the internal temperature determination means, and the food is suppressed from rising in the refrigerator. Control can be performed without adverse effects.

  According to a fourth aspect of the present invention, in the first or second aspect of the present invention, the first door opening / closing detection means and the door opening / closing determination means are provided, and if the door is opened or closed during the compressor operation before defrosting control, The control is performed to lower the set temperature of the internal temperature determination means, and the temperature rise in the refrigerator can be suppressed to prevent the food from being adversely affected.

  The invention according to claim 5 comprises the second door opening / closing detection means and the door opening time determination means in the invention according to claim 1 or 2, and if the door opening time during the compressor operation before defrosting control is long, It is control which lowers the set temperature of the said internal temperature determination means, and it can be set as control which suppresses the temperature rise in a refrigerator store | warehouse | chamber and does not have a bad influence on foodstuffs.

  The invention according to claim 6 is the invention according to claim 1 or 2, further comprising an outside air temperature detecting means and an outside air temperature determining means, and if the outside air temperature after defrosting control is equal to or higher than a set temperature, the inside temperature The control is performed to lower the set temperature of the determination means, and the control can be made such that the temperature rise in the refrigerator is suppressed and the food is not adversely affected.

  The invention according to claim 7 comprises the defrosting short time counter and the defrosting short time counter determination means in the invention according to claim 1 or 2, and if the defrosting control is completed in a short time continuously, The control is performed to lower the set temperature of the temperature determination means, and the temperature rise in the refrigerator can be suppressed and control that does not adversely affect food.

  Hereinafter, embodiments of the refrigerator will be described with reference to the drawings, but the same reference numerals are given to the same configurations as those of the conventional example or the embodiment described above, and detailed description thereof will be omitted. The present invention is not limited to the embodiments.

(Embodiment 1)
FIG. 1 is a block diagram of a defrosting control device for a refrigerator according to Embodiment 1 of the present invention. FIG. 2 is a flowchart of the defrosting control device for a refrigerator according to Embodiment 1 of the present invention.

  In FIG. 1, the stop counter 19 adds up the stop time of the compressor, the energizing time counter 20 counts the energizing time of the defrost heater, and the energizing time determination means 21 is configured so that the energizing time counter 20 exceeds the set time. (For example, 10 minutes), the stop time determination means 22 is for determining whether the stop counter 20 is longer than a set time (for example, 1 hour), and the first temperature of the temperature determination means. The setting 23 is to lower the temperature setting of the temperature determination means 18 (for example, 0 ° C.).

  About the defrost control apparatus of the refrigerator comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  First, Step 1 to Step 5 are the same as before. Next, in step 101, the stop counter 20 is started, and the process returns to step 3. If the temperature detected by the freezer temperature detection means 13 in the internal chamber temperature detection means 14 in step 3 is equal to or higher than a set temperature (for example, −20 ° C.), the process proceeds to step 102 and the stop counter 20 is stopped and the process proceeds to step 6. Steps 6 to 8 are conventional. In the next step 103, the defrosting heater energization time counter 20 starts and proceeds to step 9. Steps 9 and 10 are the same as conventional ones. In the next step 104, the energization time determination means 21 determines whether the energization time counter 20 is equal to or longer than the set time (for example, 10 minutes). The stop time determination means 22 determines whether the advance / stop counter 20 is equal to or longer than the set time (for example, 1 hour). If it is equal to or less than the set time, the set temperature of the temperature determination means 18 is decreased (for example, 0 ° C.) to step 1. Return. Further, when the set time is longer than the set time in step 104 and when the set time is longer than the set time in step 105, the process proceeds to step 107, the set temperature of the temperature determining means 18 is maintained (for example, 10 ° C.), and the process returns to step 1.

  As described above, in the present embodiment, the defrosting control time ends in a short time (for example, 10 minutes) or less, and the stop time determination means sets the time of the stop counter to a set time (for example, 1 hour) or less. If it is judged that the cooling system is deteriorated, the refrigerant leaks, etc., the cooling performance is lowered, and the temperature setting means of the next defrosting control temperature control means is lowered (for example, 0 ° C.). It is possible to suppress the temperature rise in the refrigerator and to prevent the food from being adversely affected.

(Embodiment 2)
FIG. 5 is a block diagram of a defrosting control device for a refrigerator according to Embodiment 2 of the present invention. FIG. 6 is a flowchart of the defrosting control device for a refrigerator according to Embodiment 2 of the present invention. The operation and action will be described below.

  First, Step 1 to Step 104 are the same as in the first embodiment. In the next step 105, the stop time determination means 22 determines whether or not the stop counter 20 is equal to or longer than the set time (for example, 1 hour), and if it is less than the set time, the compressor operation means 11 drives the compressor 6 in step 201, In step 202, the operation timer 12 is started. Next, in step 203, the internal temperature determination means 14 determines whether or not the temperature detected by the freezer temperature detection means 13 is equal to or lower than a set temperature (for example, −20 ° C.). The operation means 11 stops the compressor 6, stops the operation timer 12 in step 205, and returns to step 203. If the temperature detected by the freezer temperature detection means 13 at the step 203 is equal to or higher than a set temperature (for example, −20 ° C.), the process proceeds to step 206 and the compressor operation time determination means 15 times up the operation timer 12. (For example, 8 hours). If time is up, return to step 1. Further, when the set time is exceeded in step 104 and when the set time is exceeded in step 105, the process returns to step 1.

  As described above, in the present embodiment, the energization time determination unit determines that the time of the energization time counter is a set time (for example, 10 minutes) or less, and the stop time determination unit determines the time of the stop counter. Is determined to be less than a set time (for example, 1 hour), it is determined that the cooling performance has deteriorated due to deterioration of the cooling system, refrigerant leakage, and the like, and the refrigerator is controlled by canceling the next defrosting control. It is possible to suppress the temperature rise inside and to prevent the food from being adversely affected.

(Embodiment 3)
FIG. 7 is a block diagram of a defrosting control device for a refrigerator according to Embodiment 3 of the present invention. FIG. 8 is a flowchart of the defrosting control device for a refrigerator in the third embodiment of the present invention.

  In FIG. 7, the first temperature setting 24 of the internal temperature determination means lowers the temperature setting of the internal temperature determination means 14 (for example, −22 ° C.).

  About the defrost control apparatus of the refrigerator comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  First, Step 1 to Step 106 are the same as those in the first embodiment. After step 106, the process proceeds to step 301, where the first temperature setting 24 of the internal temperature determination means lowers the set temperature of the internal temperature determination means 14 (for example, −22 ° C.) and returns to step 1. When the set time is exceeded in step 104 and the set time is exceeded in step 105, the process proceeds to step 107 and the set temperature of the temperature determining means 18 is maintained (for example, 10 ° C.). The set temperature of 14 is maintained (for example, −20 ° C.), and the process returns to Step 1.

  As described above, in the present embodiment, the energization time determination unit determines that the time of the energization time counter is a set time (for example, 10 minutes) or less, and the stop time determination unit determines the time of the stop counter. Is determined to be less than the set time (for example, 1 hour), it is determined that the cooling system is deteriorated, the refrigerant leaks, etc., and the cooling performance is lowered, and the set temperature of the temperature determination means for the next defrosting control is lowered ( For example, by controlling the temperature of the internal temperature determination means to be lowered (for example, −22 ° C.) at the same time as 0 ° C., it is possible to suppress the temperature increase in the refrigerator and prevent the food from being adversely affected.

(Embodiment 4)
FIG. 9 is a block diagram of a defrosting control device for a refrigerator according to Embodiment 4 of the present invention. FIG. 10 is a flowchart of the defrosting control device for a refrigerator according to Embodiment 4 of the present invention.

  In FIG. 9, a door opening / closing detector 25 detects opening / closing of the freezer compartment door 4, and a first door opening / closing detection means 26 counts the opening / closing detected by the door opening / closing detector 25. The means 27 is for judging whether the opening / closing frequency counted by the first door opening / closing detection means 26 is equal to or more than a set number (for example, once), and the second temperature setting 28 of the internal temperature determination means is the internal temperature determination. The temperature setting of the means 14 is lowered (for example, −24 ° C.).

  About the defrost control apparatus of the refrigerator comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  Steps 1 and 2 are conventional. Next, the first door opening / closing detection means 26 counts the opening / closing detected by the door opening / closing detector 25 in step 401 and proceeds to step 3. Step 3 to step 106 are the same as those in the third embodiment. In the next step 402, the door opening / closing determination means 27 determines whether the door is open or closed. The set temperature is lowered (for example, −20 ° C.), and the process returns to Step 1. If there is an open / close, the process proceeds to step 403 to further lower the set temperature of the internal temperature determination means 13 (for example, −24 ° C.) and return to step 1.

  As described above, in the present embodiment, the time of the energization time counter that counts the energization time of the defrosting heater is determined to be equal to or less than a set time, and the stop time determination means sets the time of the stop counter. If it is determined that the door is open or closed during the compressor operation before the defrosting control is less than the time (for example, 1 hour), it is determined that the cooling performance is further deteriorated due to deterioration of the cooling system or refrigerant leakage, Control that lowers the set temperature of the internal temperature determination means (for example, −24 ° C.) can suppress the temperature increase in the refrigerator and can prevent the food from being adversely affected.

(Embodiment 5)
FIG. 11 is a block diagram of a defrosting control device for a refrigerator according to Embodiment 5 of the present invention. FIG. 12 is a flowchart of the refrigerator defrosting control apparatus according to Embodiment 5 of the present invention.

  In FIG. 11, the second door opening / closing detection means 29 detects the door opening / closing detected by the door opening / closing detector 25 and integrates the door opening time. The door opening time determination means 30 is the second door opening / closing detection means 29. It is determined whether the door opening time counted is equal to or longer than a set time (for example, 2 hours).

  About the defrost control apparatus of the refrigerator comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  Steps 1 and 2 are conventional. Next, from the opening / closing detected by the door opening / closing detector 25 in step 501, the second door opening / closing detection means 29 adds up the door opening time and proceeds to step 3. Steps 3 to 106 are the same as those in the third embodiment. In the next step 502, the door opening time determination means 30 determines whether the door opening time is longer than the set time (for example, 2 hours). If there is, the process proceeds to step 301 and the set temperature of the internal temperature determination means 13 is lowered (for example, −20 ° C.), and the process returns to step 1. If it is equal to or longer than the set time, the process proceeds to step 403, where the set temperature of the internal temperature determination means 13 is further lowered (for example, −24 ° C.), and the process returns to step 1.

  As described above, in the present embodiment, the time of the energization time counter that counts the energization time of the defrosting heater is determined to be equal to or less than a set time, and the stop time determination means sets the time of the stop counter. If it is less than the time (for example, 1 hour) and it is determined that the door is open for the set time or longer during the compressor operation before defrosting control, the cooling performance is further deteriorated and the cooling performance is further deteriorated. By determining and controlling the temperature of the internal temperature determining means to be lowered (for example, −24 ° C.), it is possible to suppress the temperature increase in the refrigerator and to prevent the food from being adversely affected.

(Embodiment 6)
FIG. 13 is a block diagram of a defrosting control device for a refrigerator according to Embodiment 6 of the present invention. FIG. 14 is a flowchart of the defrosting control device for a refrigerator in the sixth embodiment of the present invention.

  In FIG. 13, an outside air temperature detector 31 is on the top of the refrigerator 1 and senses the outside air temperature, and an outside air temperature detecting means 32 detects the temperature sensed by the outside air temperature detector 31. The determination unit 33 determines whether the temperature of the outside air temperature detection unit 31 is equal to or higher than a set temperature (for example, 25 ° C.).

  About the defrost control apparatus of the refrigerator comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  First, step 1 to step 106 are the same as those in the first embodiment, and it is determined by the outside air temperature determining means 33 in the next step 601 whether or not the outside air temperature detecting means 32 is equal to or higher than a set temperature (for example, 25 ° C.). If the temperature is equal to or lower than the temperature, the process proceeds to step 301, the set temperature of the internal temperature determination means 13 is lowered (for example, -22 ° C), and the process returns to step 1. If it is equal to or longer than the set time, the process proceeds to step 403, where the set temperature of the internal temperature determination means 13 is further lowered (for example, −24 ° C.), and the process returns to step 1. When the set time is exceeded in step 104 and the set time is exceeded in step 105, the process proceeds to step 107 and the set temperature of the temperature determining means 18 is maintained (for example, 10 ° C.). The set temperature of 14 is maintained (for example, −20 ° C.), and the process returns to Step 1.

  As described above, in the present embodiment, the time of the energization time counter that counts the energization time of the defrosting heater is determined to be equal to or less than a set time, and the stop time determination means sets the time of the stop counter. If it is determined that the time is less than the time (for example, 1 hour) and the outside air temperature is equal to or higher than the set temperature, it is determined that the cooling performance is further deteriorated due to deterioration of the cooling system or refrigerant leakage, and the internal temperature determination By controlling the temperature of the means to be lowered (for example, −24 ° C.), it is possible to suppress the temperature rise in the refrigerator and to prevent the food from being adversely affected.

(Embodiment 7)
FIG. 15 is a block diagram of a defrosting control device for a refrigerator according to Embodiment 7 of the present invention. FIG. 16 is a flowchart of the defrosting control device for a refrigerator in the seventh embodiment of the present invention.

  In FIG. 15, the defrosting short time counter 34 counts if the energization time of the defrosting heater of the energization time counter 20 is short, and the defrosting short time counter determination means 35 counts the defrosting short time counter 34 for a set number of times (for example, 2). Times) or more.

  About the defrost control apparatus of the refrigerator comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  First, Step 1 to Step 106 are the same as those in the sixth embodiment. In the next Step 701, the defrosting short time counter 34 counts and the process proceeds to Step 702. In step 702, the defrosting short time counter determining means 35 determines whether or not the number of times that the defrosting short time counter 34 has counted is equal to or more than the set number (for example, twice). The set temperature of the means 13 is lowered (for example, −22 ° C.), and the process returns to Step 1. If it is equal to or longer than the set time, the process proceeds to step 403, where the set temperature of the internal temperature determination means 13 is further lowered (for example, −24 ° C.), and the process returns to step 1. When the set time is exceeded in step 104 and the set time is exceeded in step 105, the process proceeds to step 107 and the set temperature of the temperature determining means 18 is maintained (for example, 10 ° C.). The set temperature of 14 is maintained (for example, −20 ° C.), and the process returns to Step 1.

  As described above, in the present embodiment, the time of the energization time counter that counts the energization time of the defrosting heater is determined to be equal to or less than a set time, and the stop time determination means sets the time of the stop counter. It is determined that the cooling performance is further deteriorated because it is less than the time (for example, 1 hour) and frost does not adhere to the cooler even after two refrigeration cycles, the cooling system has deteriorated, the refrigerant has leaked, etc. In addition, by controlling to lower the set temperature of the internal temperature determination means (for example, −24 ° C.), it is possible to suppress the temperature increase in the refrigerator and to prevent the food from being adversely affected.

  As described above, since the defrosting control device for a refrigerator according to the present invention can be controlled so as to suppress the temperature rise in the refrigerator cabinet and do not adversely affect the food, the cooling provided with the same defrosting device is not limited to the refrigerator. Applicable to equipment.

The block diagram of the defrost control apparatus of the refrigerator in Embodiment 1 of this invention Flowchart of the refrigerator defrost control device according to Embodiment 1 of the present invention. Block diagram of a conventional refrigerator defrost control device Flowchart of a conventional refrigerator defrost control device The block diagram of the defrost control apparatus of the refrigerator in Embodiment 2 of this invention Flowchart of refrigerator defrost control device in Embodiment 2 of the present invention The block diagram of the defrosting control apparatus of the refrigerator in Embodiment 3 of this invention Flowchart of refrigerator defrosting control device in Embodiment 3 of the present invention The block diagram of the defrost control apparatus of the refrigerator in Embodiment 4 of this invention Flowchart of refrigerator defrosting control apparatus in Embodiment 4 of the present invention The block diagram of the defrost control apparatus of the refrigerator in Embodiment 5 of this invention Flowchart of refrigerator defrosting control apparatus in Embodiment 5 of the present invention The block diagram of the defrost control apparatus of the refrigerator in Embodiment 6 of this invention. Flowchart of refrigerator defrost control device in Embodiment 6 of the present invention The block diagram of the defrost control apparatus of the refrigerator in Embodiment 7 of this invention. Flowchart of refrigerator defrosting control apparatus according to Embodiment 7 of the present invention

Explanation of symbols

6 Compressor 8 Defrosting heater 11 Compressor operating means 12 Operation timer 13 Internal temperature detecting means 14 Internal temperature determining means 15 Compressor operating time determining means 16 Defrosting heater driving means 17 Cooler temperature detecting means 18 Temperature determining means 19 Stop counter 21 Energization Time determination means 20 Energizing time counter 22 Stop time determination means 26 First door open / close detection means 27 Door open / close determination means 29 Second door open / close detection means 30 Door open time determination means 32 Outside air temperature detection means 33 Outside air temperature determination means 34 Short defrosting Time counter 35 Defrosting short-time counter judgment

Claims (7)

  Compressor operation means for operating the compressor, an operation timer for integrating the operation time of the compressor, a compressor operation time determination means for determining whether the integration time of the operation timer is equal to or greater than a set time, and detecting the temperature of the freezer An internal temperature detecting means for determining, an internal temperature determining means for determining whether the temperature detected by the internal temperature detecting means is equal to or higher than a set temperature, a stop counter for integrating the stop time of the compressor, and the stop counter A stop time determining means for determining whether or not the engine operating time is equal to or longer than a set time, a defrost heater driving means for driving the defrost heater after the compressor operating time determining means determines that the accumulated time of the operation timer is equal to or greater than the set time, and the defrosting Energizing time counter for counting the energizing time of the heater, and cooler temperature detecting means for detecting the temperature of the cooler A temperature determination unit that determines whether the temperature detected by the cooler temperature detection unit is equal to or higher than a set temperature; and an energization time determination unit that determines whether the energization time counter is equal to or higher than a set time. If the time of the energization time counter that counts the energization time of the defrosting heater by the determination means is less than or equal to the set time and the accumulated time of the stop counter that accumulates the stop time of the compressor is less than or equal to the set time, next time The refrigerator defrost control device which lowers the determination temperature of the temperature determination means.   Compressor operation means for operating the compressor, an operation timer for integrating the operation time of the compressor, a compressor operation time determination means for determining whether the integration time of the operation timer is equal to or greater than a set time, and detecting the temperature of the freezer An internal temperature detecting means for determining, an internal temperature determining means for determining whether the temperature detected by the internal temperature detecting means is equal to or higher than a set temperature, a stop counter for integrating the stop time of the compressor, and the stop counter A stop time determining means for determining whether or not the engine operating time is equal to or longer than a set time, a defrost heater driving means for driving the defrost heater after the compressor operating time determining means determines that the accumulated time of the operation timer is equal to or greater than the set time, and the defrosting Energizing time counter for counting the energizing time of the heater, and cooler temperature detecting means for detecting the temperature of the cooler A temperature determination unit that determines whether the temperature detected by the cooler temperature detection unit is equal to or higher than a set temperature; and an energization time determination unit that determines whether the energization time counter is equal to or higher than a set time. If the time of the energization time counter that counts the energization time of the defrosting heater by the determination means is less than or equal to the set time and the accumulated time of the stop counter that accumulates the stop time of the compressor is less than or equal to the set time, next time The defrost control apparatus of the refrigerator made into control which interrupted defrost control.   The energization time counter that counts the energization time of the defrost heater by the energization time determination means is less than or equal to a set time, and the accumulated time of the stop counter that accumulates the stop time of the compressor is less than or equal to the set time. 3. The defrosting control device for a refrigerator according to claim 1, wherein control is performed to lower a set temperature of the internal temperature determination means.   3. The control according to claim 1, further comprising a first door opening / closing detection unit and a door opening / closing determination unit, wherein if the door is opened / closed during the compressor operation before the defrosting control, the control is performed to lower the set temperature of the internal temperature determination unit. Defrost control device for refrigerator.   The control device according to claim 1, further comprising a second door opening / closing detection unit and a door opening time determination unit, wherein if the door opening time during the compressor operation before the defrosting control is long, control is performed to lower the set temperature of the internal temperature determination unit. The refrigerator defrost control apparatus of description.   3. The refrigerator according to claim 1, further comprising an outside air temperature detection unit and an outside air temperature determination unit, wherein if the outside air temperature after defrosting control is equal to or higher than a set temperature, the control is performed to lower the set temperature of the internal temperature determination unit. Defrost control device.   The refrigerator according to claim 1 or 2, further comprising a defrosting short-time counter and a defrosting short-time counter determination unit, wherein when the defrosting control is completed in a short time continuously, the set temperature of the internal temperature determination unit is decreased. Defrost control device.

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