JP2007017069A - Defrosting control device for refrigerator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a refrigerator, in which temperature rise of the inside of the refrigerator is suppressed, when a cooler is not defrosted due to deterioration of a cooling system, leakage of refrigerant or the like, by reducing a set temperature of a temperature determination means for defrosting control so as not to adversely affect foods. <P>SOLUTION: This control device comprises a defrosting heater current-carrying time counter 14, a current-carrying time determination means 17, and a first temperature set 18 of the temperature determination means. When the defrosting heater current-carrying time during defrosting control is a set time (e.g., 10 min) or less, the set temperature of the temperature determination means for the following defrosting control is reduced (e.g., 5°C). According to this, the temperature rise of the inside of the refrigerator can be suppressed so as not to adversely affect foods. <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 frost attached to the cooler (see, for example, Patent Document 1). .

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

  FIG. 11 is a block diagram of a conventional refrigerator defrost control device. FIG. 12 is a flowchart of a conventional refrigerator defrosting control device.

  As shown in FIG. 11, 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 compressor operation means for driving the compressor 6, and 11 denotes an operation timer for integrating the operation time of the compressor. Reference numeral 12 denotes compressor operation time determination means, which is timed up when the time of the operation timer 11 reaches a set time (for example, 8 hours). Reference numeral 13 denotes defrost heater driving means for driving the defrost heater 8, and reference numeral 14 denotes cooler temperature detecting means for detecting the temperature detected by the cooler temperature detector 9. Reference numeral 15 is composed of temperature determination means for determining whether or not the temperature detected by the cooler temperature detection means 14 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, at step 1, the compressor operation means 10 drives the compressor 6, and at step 2, the operation timer 11 is started. Next, in step 3, the compressor operation time determination means 12 determines whether the operation timer 11 has timed up (for example, 8 hours). In step 4, the compressor 6 is stopped and the cooling cycle is completed. In step 5, the defrost heater driving means 13 energizes the defrost heater 8 and enters defrost control. Next, in step 6, if the temperature detected by the cooler temperature detecting means 14 is equal to or higher than a set temperature (for example, 10 ° C.), the process proceeds to step 7, the energization of the defrosting heater 8 is stopped, and the process returns 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-mentioned conventional problems, and when the frost in the cooler is not attached due to deterioration of the cooling system or leakage of the refrigerant, the set temperature of the temperature determination means of the defrost control is lowered to increase the temperature in the refrigerator cabinet. It aims at providing the refrigerator which does not have a bad influence on the foodstuff to suppress.

  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, The control is performed to lower the set temperature of the temperature determination means for the next defrost control (for example, 5 ° C.).

  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.

  When the defrost control time of the refrigerator of the present invention is completed within a short time (for example, 10 minutes) or less, the cooling system is deteriorated, the refrigerant leaks, etc., and the frost attached to the cooler is extremely reduced. It can be determined that the amount is low, the temperature set in the temperature determination means for the next defrost control is lowered, the temperature rise in the refrigerator is suppressed, and the food is not adversely affected.

  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. Detecting by means, defrost heater driving means for driving the defrost heater, energizing time counter for counting energizing time of the defrost heater, cooler temperature detecting means for detecting the temperature of the cooler, and the cooler temperature detecting means Temperature determining means for determining whether the measured temperature is equal to or higher than a set temperature, and energization time determining means for determining whether the energization time counter is equal to or higher than the set time, wherein the compressor operating time determining means is integrated with the operation timer. It is determined whether the time has reached the set time, and if so, the compressor is stopped and a cooling cycle is performed. Is finished, the defrosting control is started, the defrosting heater driving means energizes the defrosting heater, and the temperature determination means stops the defrosting heater when the temperature of the cooler temperature detection means exceeds the set temperature, and the defrosting control is finished. If the time of the energization time counter for counting the energization time of the defrosting heater by the energization time determination means is less than or equal to the set time, the determination temperature of the next temperature determination means is lowered, and the temperature in the refrigerator compartment Control can be made to suppress the rise and not adversely affect the food.

  The invention according to claim 2 is the invention according to claim 1, further comprising first door opening / closing detection means and door opening / closing determination means, and if the door is opened or closed during the compressor operation before defrosting control, the temperature determination means. Since the frost does not adhere to the cooler even when the door is opened or closed, it is possible to accurately determine the degree of deterioration of the cooling system, leakage of refrigerant, etc. Control can be made so as not to adversely affect the food.

  The invention according to claim 3 is the invention according to claim 1, further comprising an outside air temperature detection means and an outside air temperature determination means, and if the outside air temperature after defrosting control is equal to or higher than a predetermined temperature, the determination by the temperature determination means. The temperature is controlled to be lowered, and frost does not adhere to the cooler even at high outside air temperatures, so it is possible to accurately determine the degree of cooling system deterioration, refrigerant leakage, etc. Control can be made so as not to adversely affect the food.

  According to a fourth aspect of the present invention, in the first aspect of the invention, the second door opening / closing detecting means and the door opening / closing time determining means are provided, and if the door opening / closing time during the compressor operation before defrosting control is long, the temperature This is a control that lowers the judgment temperature of the judgment means. Since the frost does not adhere to the cooler even when the door is opened, it is possible to accurately judge the degree of cooling system deterioration, refrigerant leakage, etc. Control can be made to suppress the rise and not adversely affect the food.

  The invention according to claim 5 comprises the defrosting short time counter and the defrosting short time counter determining means in the invention according to claim 1, and if the defrosting control is completed in a short time continuously, the temperature determining means This is a control that lowers the judgment temperature. Since there is no frost adhering to the cooler even after two refrigeration cycles, it is possible to accurately judge the degree of cooling system deterioration, refrigerant leakage, etc. It is possible to control the temperature rise so as not to adversely affect the 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)
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 energization time counter 16 counts the energization time of the defrosting heater, and the energization time determination means 17 determines whether the energization time counter 16 is equal to or longer than a set time (for example, 10 minutes). The first temperature setting 18 of the temperature determination means is to lower the temperature setting of the temperature determination means 15 (for example, 5 ° C.).

  About the defrost control apparatus of the refrigerator comprised as mentioned above, the operation | movement and an effect | action are demonstrated below in FIG. First, Step 1 to Step 5 are the same as before. Next, in step 101, the defrosting heater energization time counter 16 is started and the process proceeds to step 6. Steps 6 and 7 are the same as in the prior art. In the next step 102, the energization time determination means 17 determines whether the energization time counter 16 is equal to or longer than the set time (for example, 10 minutes). Then, the set temperature of the temperature determination means 15 is lowered (for example, 5 ° C.) and the process returns to Step 1. If it is longer than the set time, the process proceeds to step 104, the set temperature of the temperature determination means 15 is maintained (for example, 10 ° C.), and the process returns to step 1.

  As described above, in the present embodiment, if the defrosting control time is completed in a short time (for example, 10 minutes) or less, the cooling system is deteriorated, the refrigerant leaks, etc., and the frost attached to the cooler is extreme. Therefore, it is possible to control so as not to adversely affect the food by suppressing the temperature rise in the refrigerator cabinet by lowering the set temperature of the temperature determination means of the next defrost control (for example, 5 ° C.). .

(Embodiment 2)
FIG. 3 is a block diagram of a defrosting control device for a refrigerator according to Embodiment 2 of the present invention. FIG. 4 is a flowchart of the defrosting control device for a refrigerator according to Embodiment 2 of the present invention.

  In FIG. 3, the door opening / closing detector 19 detects the opening / closing of the freezer compartment door 4, and the first door opening / closing detecting means 20 counts the door opening / closing detected by the door opening / closing detector 19. The open / close determining means 21 determines whether or not the door has been opened and closed. The second temperature setting 22 of the temperature determining means lowers the temperature setting of the temperature determining means 15 (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 in FIG.

  First, step 1 and step 2 are conventional. Next, in step 201, the open / close state of the freezer compartment door opening / closing detection means is counted, and the process proceeds to step 3. Steps 3 to 7 are the same as those in the first embodiment. In the next step 102, the energization time determination means 17 determines whether the energization time counter 16 is equal to or longer than the set time (for example, 10 minutes). If there is, the process proceeds to step 202, and if it is equal to or longer than the set time, the process proceeds to step 104, the set temperature of the temperature determination means 15 is maintained (for example, 10 ° C.), and the process returns to step 1. In step 202, the door opening / closing determination means 21 determines whether the door has been opened or closed. If there is no opening / closing, the process proceeds to step 103, the temperature setting means 15 is lowered (for example, 5 ° C.), and the process returns to step 1. If there is an open / close, the process proceeds to step 203, the set temperature of the temperature determining means 15 is further lowered (for example, 0 ° C.), and the process returns to step 1 and thereafter is the same as in the first embodiment.

  As described above, in the present embodiment, even if the door is opened and closed during the comp operation before defrosting control, if the defrosting control time is short, the set temperature of the temperature determination means is set lower (for example, 0 ° C.). Because the frost does not adhere to the cooler even when the door is opened and closed, it is possible to accurately determine the degree of deterioration of the cooling system, leakage of refrigerant, etc., and to control the temperature rise in the refrigerator to prevent adverse effects on food. it can.

(Embodiment 3)
FIG. 5 is a block diagram of a defrosting control device for a refrigerator according to Embodiment 3 of the present invention. FIG. 6 is a flowchart of the defrosting control device for a refrigerator according to Embodiment 3 of the present invention.

  In FIG. 5, the outside air temperature detector 23 is located on the top of the refrigerator 1 and senses the outside air temperature, and the outside air temperature detecting means 24 detects the temperature sensed by the outside air temperature detector 23. The determination unit 25 determines whether or not the temperature of the outside air temperature detection unit 24 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 in FIG.

  First, steps 1 to 7 are the same as those in the first embodiment. In the next step 102, the energization time determination means 17 determines whether the energization time counter 16 is equal to or longer than a set time (for example, 10 minutes), and is set. If it is less than the time, the process proceeds to step 301, and if it is greater than or equal to the set time, the process proceeds to step 104 where the set temperature of the temperature determination means 15 is maintained (for example, 10 ° C.) and the process returns to step 1. In step 301, it is determined whether or not the outside air temperature is equal to or higher than a set temperature (for example, 25 ° C.), and if it is lower than the set temperature, the process proceeds to step 103 and the set temperature of the temperature determining means 15 is decreased (for example, 5 ° C.). Return to step 1. If the temperature is equal to or higher than the set temperature, the process proceeds to step 203, the set temperature of the temperature determination unit 15 is further lowered (for example, 0 ° C.), and the process returns to step 1 and thereafter.

  As described above, in the present embodiment, even if the outside temperature is high, if the defrosting control time is short, the set temperature of the temperature determination means is set lower (for example, 0 ° C.), so that the cooler can be used even at a high outside temperature. Since there is no adhesion of frost to the water, it is possible to accurately determine the degree of deterioration of the cooling system, the leakage of the refrigerant, etc., and to control the temperature rise in the refrigerator to prevent food from being adversely affected.

(Embodiment 4)
FIG. 7 is a block diagram of a defrosting control device for a refrigerator according to Embodiment 4 of the present invention. FIG. 8 is a flowchart of the defrosting control device for a refrigerator in the fourth embodiment of the present invention.

  In FIG. 7, the second door opening / closing detection means 26 detects the door opening / closing detected by the door opening / closing detector 19 and also counts the door opening time. The door opening / closing time determining means 27 is the second door opening / closing detection means. It is determined whether or not the counted door opening time is a set time (for example, 2 hours) or more.

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

  First, steps 1 to 102 are the same as those in the first embodiment. In step 401, the second door opening / closing detection means 26 counts the door opening time and proceeds to step 3. Steps 3 to 7 are the same as those in the first embodiment. In the next step 102, the energization time determination means 17 determines whether the energization time counter 16 is equal to or longer than the set time (for example, 10 minutes). If there is, the process proceeds to step 402, and if it is longer than the set time, the process proceeds to step 104, the set temperature of the temperature determination means 15 is maintained (for example, 10 ° C.), and the process returns to step 1. In step 402, the second door opening / closing time determining means 27 determines whether or not the door opening time is longer than a set time (for example, 2 hours). If it is shorter than the set time, the process proceeds to step 103 and the set temperature of the temperature determining means 15 is decreased ( (For example, 5 ° C.) Return to Step 1. If it is longer than the set time, the process proceeds to step 203, the set temperature of the temperature determining means 15 is further lowered (for example, 0 ° C.), and the process returns to step 1 and thereafter, as in the first embodiment.

  As described above, in the present embodiment, if the door opening is longer than the set time and the defrost control time is shorter during the comp operation before the defrost control, the set temperature of the temperature determination means is set lower (for example, 0 ° C.). Therefore, even if the door is opened, there is no frost sticking to the cooler, so the degree of deterioration of the cooling system or leakage of the refrigerant is accurately judged, and the temperature rise in the refrigerator is suppressed and the control is made so as not to adversely affect the food. Can do.

(Embodiment 5)
FIG. 9 is a block diagram of a defrosting control device for a refrigerator according to Embodiment 5 of the present invention. FIG. 10 is a flowchart of the defrosting control device for a refrigerator in the fifth embodiment of the present invention.

  In FIG. 9, a defrosting short time counter 28 counts if the energizing time of the defrosting heater of the energizing time counter 16 is short, and the defrosting short time counter determining means 29 counts the set number of times (for example, the defrosting short time counter 28) 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 in FIG. First, steps 1 to 7 are the same as those in the first embodiment. In the next step 102, the energization time determination means 17 determines whether the energization time counter 16 is equal to or longer than a set time (for example, 10 minutes), and is set. If it is less than the time, the process proceeds to step 501. If it is greater than the set time, the process proceeds to step 104, where the set temperature of the temperature determination means 15 is maintained (for example, 10 ° C.). Return to step 1. In step 501, the defrosting short time counter 28 counts and proceeds to step 503. In step 503, the defrosting short time counter determining means 29 determines whether or not the count of the defrosting short time counter 28 is equal to or greater than a set number (for example, 2 times). Is lowered (for example, 5 ° C.) to return to Step 1. If the temperature is equal to or higher than the set temperature, the process proceeds to step 203, the set temperature of the temperature determination unit 15 is further lowered (for example, 0 ° C.), and the process returns to step 1 and thereafter.

  As described above, in the present embodiment, if the defrosting control is continuously completed in a short time (for example, two times or more), the set temperature of the temperature determination unit is set to a lower value (for example, 0 ° C.), thereby 2 Since there is no frost sticking to the cooler even after multiple refrigeration cycles, it is possible to accurately determine the degree of cooling system deterioration, refrigerant leakage, etc. can do.

  As described above, the defrosting control device for a refrigerator according to the present invention causes the frost attached to the cooler to deteriorate due to deterioration of the cooling system, leakage of the refrigerant, or the like if the defrosting control time ends in a predetermined time or less. It is possible to reduce the set temperature of the temperature determinator for the next defrost control and suppress the temperature rise in the refrigerator cabinet so that it does not adversely affect food. It can be applied to defrost control.

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. 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 Block diagram of a conventional refrigerator defrost control device Flowchart of a conventional refrigerator defrost control device

Explanation of symbols

6 Compressor 8 Defrosting heater 9 Cooler temperature detector 10 Compressor operating means 11 Operation timer 12 Compressor operating time determining means 13 Defrosting heater driving means 14 Cooler temperature detecting means 15 Temperature determining means 16 Energizing time counter 17 Energizing time determining means 20 1 door opening / closing detection means 21 door opening / closing determination means 24 outside air temperature detection means 25 outside air temperature determination means 26 second door opening / closing detection means 27 door opening / closing time determination means 28 defrosting short time counter 29 defrosting short time counter determination means

Claims (5)

  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 a defroster for driving the defrost heater Whether the temperature detected by the heater driving means, the energizing time counter for counting the energizing time of the defrost heater, the cooler temperature detecting means for detecting the temperature of the cooler, and the temperature detected by the cooler temperature detecting means is equal to or higher than a set temperature. Temperature determining means for determining whether the energizing time counter is equal to or greater than a set time, and whether the compressor operating time determining means has reached the set time of the operation timer. If it has reached, the compressor is stopped and the cooling cycle is completed. The defrosting heater driving means energizes the defrosting heater and the temperature determination means stops the defrosting heater when the temperature of the cooler temperature detection means is equal to or higher than a preset temperature, and the defrosting control is terminated, and the energization time determination means If the time of the energization time counter for counting the energization time of the defrosting heater is less than or equal to the set time, the defrosting control device for a refrigerator that lowers the determination temperature of the next temperature determination means.   The refrigerator defrosting 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 determination temperature of the temperature determination unit is lowered. apparatus.   The defrost control device for a refrigerator according to claim 1, further comprising an outside air temperature detection unit and an outside air temperature determination unit, wherein the determination temperature of the temperature determination unit is lowered when the outside air temperature after the defrost control is equal to or higher than a predetermined temperature.   2. The refrigerator according to claim 1, further comprising a second door opening / closing detection unit and a door opening / closing time determination unit, wherein the determination temperature of the temperature determination unit is lowered when the door opening / closing time during the compressor operation before the defrosting control is long. Defrost control device.   The defrosting control device for a refrigerator according to claim 1, further comprising a defrosting short-time counter and a defrosting short-time counter determination unit, wherein the determination temperature of the temperature determination unit is decreased when the defrosting control is completed in a short time continuously. .

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