JP2005180917A - Refrigerator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a controller of a refrigerator for changing a temperature setting value according to operation ratio of a compressor 18. <P>SOLUTION: The refrigerator is equipped with a first series circuit 25 for determining an operation start temperature for operating the compressor in a predetermined temperature range and an operation end temperature for stopping the compressor according to the setting temperature set with a temperature setting means for setting temperature of a refrigerating chamber and a controller 20 for controlling operation of the compressor based on the operation start temperature and the operation end temperature set by the first series circuit and the refrigerating chamber temperature detected by a temperature sensor for detecting the temperature of the refrigerating chamber. The controller 20 calculates the operation ratio of the compressor by measuring the operation time and stopping time of the compressor 18 and a temperature range band of the operation start temperature and the operation end temperature is changed based on the calculated operation ratio. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a refrigerator in which a control temperature range in temperature control of a refrigerator compartment is changed based on an operation rate of a compressor and an on / off cycle time.

  The control device for the cooling device disclosed in Patent Literature 1 preceding the present invention controls the operation of the compressor within a predetermined temperature range based on the detected temperature of the space. Further, the control device is configured to provide the predetermined temperature range when the operation rate of the compressor determined by the ratio of the compressor operation period and the sum of the operation period and the stop period is smaller than a predetermined operation rate. Is configured to expand.

  Further, in Patent Document 2 that precedes the present invention, there is provided a control device that is provided with a sensor that detects an outside air temperature, and that when the outside air temperature is low, the predetermined temperature range is expanded to extend the compressor stop period. It was disclosed.

  In the above-mentioned Patent Document 1, in order to adjust the predetermined temperature range, when the operating rate of the compressor measured and measured is smaller than the predetermined operating rate, the predetermined temperature range is expanded. As a result of this expansion operation, the control differential is expanded (the operation rate of the compressor after changing this temperature range tends to be larger than the predetermined operation rate), and the next operation rate check confirms that the control differential has become larger than the predetermined operation rate. Then, the control differential is reduced. For this reason, in the control operation of expanding the predetermined temperature range when the operation rate is small compared to the predetermined operation rate, the temperature range may increase or decrease for each on / off cycle of the compressor. There was a problem that the temperature of the freezer room was not stabilized by the increase / decrease operation, and the temperature effect on other storage rooms could not be ignored.

  On the other hand, in the control device of Patent Document 2, not only the outside air temperature sensor is increased, but also early cooling is necessary, for example, when a large heat load (for example, warm food) is stored in the cabinet when the outside air temperature is low. Nevertheless, since the outside air temperature is low, the control temperature range is large and it is easy to delay returning to the cooling operation, so the ambient temperature rises and the quality of the surrounding food and the food stored in other storage rooms is reduced. There were problems such as.

An object of this invention is to provide the refrigerator which changed the temperature range in the control means which controls the driving | operation of a compressor based on the operating rate of a compressor.
Japanese Patent Laid-Open No. 2-115673 Japanese Patent Laid-Open No. 56-130573

  The present invention prevents the freezing room from being cooled in a refrigerator that detects the temperature of the refrigerating room, not the freezing room, and controls the temperature of the refrigerator.

  According to the first aspect of the present invention, the operation start temperature for operating the compressor within a predetermined temperature range and the operation stop temperature for stopping the compressor are set based on the set temperature set by the temperature setting means for setting the temperature of the refrigerator compartment. The compressor is operated based on a control temperature setting unit to be determined, and the operation start temperature and the operation stop temperature set by the control temperature setting unit, and the temperature of the refrigerator compartment detected by the temperature detection means for detecting the temperature of the refrigerator compartment. Control means for controlling, the operation time and stop time of the compressor is measured by this control means, the operation rate of the compressor is calculated, and the temperature of the operation start temperature and the operation stop temperature is calculated based on the calculated operation rate. The operating range of the compressor can be appropriately set by changing the width band, and the temperature of the refrigerator compartment can be controlled to prevent the freezer compartment from being cooled.

  Claim 2 of the present invention provides an operation start temperature for operating the compressor within a predetermined temperature range and an operation stop temperature for stopping the compressor based on the set temperature set by the temperature setting means for setting the temperature of the refrigerator compartment. The compressor is operated based on a control temperature setting unit to be determined, and the operation start temperature and the operation stop temperature set by the control temperature setting unit, and the temperature of the refrigerator compartment detected by the temperature detection means for detecting the temperature of the refrigerator compartment. Control means for controlling, measuring the operation time and stop time of the compressor to calculate the operation rate of the compressor, and based on the calculated operation rate, the operation start temperature and the operation stop temperature. When the temperature range is changed, the compressor is forcibly operated when the compressor is turned on and when the compressor is stopped for a certain period of time, and the compressor is compressed even when the outside air temperature is below the set temperature. Can drive the machine I try to do it.

  According to the first aspect of the present invention, the operation start temperature for operating the compressor within a predetermined temperature range based on the set temperature set by the temperature setting means for setting the temperature of the refrigerator compartment and the operation stop for stopping the compressor Based on the control temperature setting unit for determining the temperature, the operation start temperature and the operation stop temperature set in the control temperature setting unit, and the temperature in the refrigerator compartment detected by the temperature detection means for detecting the temperature in the refrigerator compartment. Control means for controlling operation, the operation time and stop time of the compressor are measured by the control means, the operation rate of the compressor is calculated, and the operation start temperature and the operation stop temperature are calculated based on the calculated operation rate. Thus, the operating rate of the compressor can be set appropriately, and temperature control of the refrigerator compartment can be prevented from becoming uncooled.

  According to claim 2 of the present invention, the operation start temperature for operating the compressor within a predetermined temperature range based on the set temperature set by the temperature setting means for setting the temperature of the refrigerator compartment and the operation stop for stopping the compressor Based on the control temperature setting unit for determining the temperature, the operation start temperature and the operation stop temperature set in the control temperature setting unit, and the temperature in the refrigerator compartment detected by the temperature detection means for detecting the temperature in the refrigerator compartment. Control means for controlling operation, and the control means measures the operation time and stop time of the compressor to calculate the operation rate of the compressor, and based on the calculated operation rate, the operation start temperature and the operation stop Since the temperature range of the temperature is changed and the compressor is forcibly operated when the compressor is turned on and when the compressor is stopped for a certain time or more, the compressor operating rate is optimized. If you can set Moni, can forcibly drive the compressor even when the outside air temperature is below the set temperature. Based on the operating cycle time of the compressor measured by the cycle time measuring unit and the operating rate measured by the operating rate measuring unit, the temperature differential control unit changes the control differential (that is, the predetermined temperature range) of the freezer compartment. As a result, the control differential can be set as appropriate based on the fluctuations in the operation cycle time and the operation rate, and the temperature control of the freezer can be performed more finely than before, and the refrigerating room or ice greenhouse can be used. Therefore, it is possible to provide a control apparatus suitable for fine temperature control of the entire refrigerator.

  Embodiments of the present invention will be described below with reference to the drawings. 1 is a side sectional view of the refrigerator of the present invention, FIG. 2 is a control circuit diagram of the present invention, FIG. 3 is a switching flow diagram showing a flow of changing the temperature setting range of the present invention, and FIG. 4 is a control of the refrigerator of the present invention. FIG. 5 is a flowchart for explaining the operation of the refrigerator control device of the present invention, FIG. 6 is a flowchart for explaining the operation of the refrigerator control device of the present invention, and FIG. 7 is a flowchart for explaining the operation of the refrigerator of the present invention. The flowchart explaining operation | movement of a control apparatus, FIG. 8 is a flowchart explaining operation | movement of the control apparatus of the refrigerator of this invention.

  Reference numeral 1 denotes a refrigerator. The refrigerator includes an outer box 2 made of a steel plate whose front is opened, an inner box 3 made of hard resin such as ABS with a space inside the outer box, and an inner box and an outer box. A main body 5 is constituted by a foamed urethane heat insulating material 4 filled in-situ by an in-situ foaming system, and the openings of the main body are closed by doors 6 and 7.

  Reference numeral 8 denotes a horizontal partition wall that divides the interior of the main body 5 up and down. The upper part of the horizontal partition wall is a freezer compartment 9 that is cooled to a freezing temperature, and the lower part is a refrigerator compartment 10 that is cooled to a temperature at which food is not frozen. The inner part of the freezer compartment 9 is partitioned forward and backward by a partition plate 11, a cooling chamber 12 is partitioned and formed behind the partition plate, and a cooler 13 is provided vertically in the cooling chamber. A blower 14 is provided above the center of the cooler, and a defrost heater 15 is provided below the cooler 13.

  The partition plate 11 is provided with an outlet 16 for blowing cool air into the freezer compartment 9 upward and a return port 17 for returning the cold air blown into the freezer compartment 9 to the lower side of the cooler 13.

  The cooler 13 is supplied with the refrigerant compressed by the compressor 18 provided on the lower back surface of the main body 5, and performs heat exchange with the air in the box to cool the inside of the box.

  Reference numeral 19 denotes a temperature sensor that detects the temperature in the refrigerator compartment 10, and this temperature sensor is a temperature at which the compressor 18 is on / off controlled when the temperature in the refrigerator compartment 10 exceeds the operation start temperature or the operation stop temperature within the temperature setting range. The detection means of the control device 20 is formed.

  As shown in FIG. 2, the temperature control device 20 includes a microcomputer 21, a first resistor 22, a second resistor 23, and a variable resistor connected to the microcomputer for setting an operation start temperature and an operation stop temperature. 24, a first series circuit 25 with 24, a second series circuit 27 with a third resistor 26 for detecting the temperature of the refrigerator compartment 10 and a temperature sensor 19, and a closed circuit 29 with a compressor 18 and a power supply 28 (contact points ( And a third series circuit 32 of a transistor 31 and a relay 30 having a not-shown). The microcomputer 21 outputs to the transistor 31 of the third series circuit 32 by the input signals from the first series circuit 25 for temperature setting and the second series circuit 27 for temperature detection in the refrigerator compartment 10 to operate the relay 30. Then, the operation of the compressor 18 is stopped by turning the contacts on and off, the on time and the off time due to the stop of the operation of the compressor are detected, and the operation rate by the on time and the off time is calculated.

  The microcomputer 21 controls the compressor 18 to be forcibly operated when the power supply 28 is turned on or when the compressor 18 has not been operated for a certain period of time.

  The temperature set value set by the first series circuit 25 is a high temperature range (operation start temperature 10.0 ° C., operation stop temperature 7.0 ° C., differential 3 ° C.), medium temperature range (operation start temperature 8.0 ° C., Shutdown temperature 6.0 ° C, differential 2 ° C), medium / low temperature range (starting temperature 7.0 ° C, shutdown temperature 5.0 ° C, differential 2 ° C), low temperature range (starting temperature 5.0 ° C) , Operation stop temperature 4.0 ° C., differential 1.0 ° C.).

  As shown in FIG. 3, when the temperature setting value is operated in the high temperature range, the compressor 18 continues to operate at the temperature setting value when the operation rate is 32% or more, and when the operation rate is 32% or less. The temperature setting value is changed to the middle temperature range.

  When the temperature setting value is operated in the middle temperature range, the operation is continued at the temperature setting value when the operation rate is between 21% and 50%, and the temperature setting value is within the high temperature range when the operation rate is 50% or more. When the operating rate is 21% or less, the temperature set value is changed to the middle / low temperature range.

  When the temperature setting value is operated in the middle and low temperature range, the operation is continued at the temperature setting value when the operation rate is between 10% and 38%, and the temperature setting value is within the medium temperature range when the operation rate is 38% or more. When the operating rate is 10% or less, the temperature set value is changed to the low temperature range.

  When the temperature set value is operated in the low temperature range, the operation is continued at the temperature set value when the operation rate is 25% or less, and the temperature set value is changed to the medium / low temperature range when the operation rate is 25% or more. The

  Based on the above configuration, the operation flow of the temperature control device 20 of the refrigerator compartment 10 will be described with reference to the flowcharts of FIGS. 3 to 8. First, the presence or absence of operation of the compressor 18 is detected in step S1. If it is in operation, the process proceeds to step S6, the forced operation counter is incremented and it is determined whether or not 5 minutes have elapsed in step S7, and if 5 minutes have not elapsed, the process proceeds to step S9. If five minutes have elapsed, the forcible operation flag is reset in step S8, and the process proceeds to step S9.

  If the continuous operation flag is set in step S9, the process proceeds to step S16. If the continuous operation flag is reset in step S9, the continuous operation counter is increased in step S10, and the compressor 18 is continuously operated in step S11. If one hour has not elapsed, the process proceeds to step S16. If one hour has elapsed in step S11, the compressor 18 is stopped. In step S12, a flag for continuous operation is set, and in step S13, control method 2 is entered. change.

  In step S14, the control method change data is cleared. In step S15, the change data acquisition start flag is reset, and the process proceeds to step S16. In addition, when it is not operated in step S1, the stop time counter is increased and it is determined whether or not 1 hour has passed in step S3. If 1 hour has not passed, the process proceeds to step S16 and 1 hour has passed. If it is, the forced operation flag is set in step S4, the forced operation counter is cleared in step S5, and the process proceeds to step S16.

  In step S16, the control change delay counter is increased, and in step S17, it is determined whether or not the delay counter has elapsed for one hour. If one hour has not elapsed, the process proceeds to step S19, and if one hour has elapsed, step is performed. In S18, the control change delay flag is reset, and the process proceeds to Step S19. In step S19, it is determined whether or not the compressor 18 is operating. If the compressor 18 is operating, the first operating time counter is increased in step S20, the first normal time counter is increased in step S21, and the process proceeds to step S22. If so, the process proceeds to step S22 via step S21.

  In step S22, it is determined whether or not 1 hour has passed. If 1 hour has passed, the start flag of the second counter is set in step S23, and the process proceeds to step S24. The process proceeds to S24.

  It is determined whether or not 2 hours have elapsed since the start flag of the second counter was set in step S24. If 2 hours have not elapsed, the process proceeds to step S28, and if 2 hours have elapsed, in step S25. The control change start flag is set, the first operating time counter is copied to the confirmation RAM in step D26, the first operating time counter is cleared in step S27, and the process proceeds to step S28.

  In step S28, the presence or absence of the start flag of the second counter is determined. If this start flag is set, the presence or absence of operation of the compressor 18 is determined in step S29. If it is operated, the operation time is determined in step S30. The second counter is increased, the normal time second counter is increased in step S31, and the process proceeds to step S32. If the compressor 18 is not operated in step S29, the process proceeds to step S32 via step S31. It is determined in step S32 whether or not 2 hours have passed. If 2 hours have not passed, the process proceeds to step S36. If 2 hours have passed, a control change start flag is set in step S33, and operation is performed in step S34. Copy the second time counter to the confirmation RAM and clear the second operation time counter in step S35. To migrate to 36. If the start flag of the second counter is reset in step S28, the process proceeds to step S36.

  In step S36, the presence / absence of a change data acquisition start flag is determined. If this start flag is reset, the process proceeds to step S38. If the start flag is set, the presence / absence of a control change delay flag is determined in step S37. If this delay flag is set, the process proceeds to step S38. If the control change delay flag is reset, the process proceeds to step S39, and the control method change data is cleared in step S38, and the process proceeds to step S39.

  In step S39, it is determined whether or not there is a control change start flag. If this start flag is reset, the process proceeds to step S58. If the control change start flag is set, whether or not the compressor 18 is operating in step S40. When the compressor 18 is stopped in step S40, the process proceeds to step S58, and when the compressor 18 is operated, the process proceeds to step S41.

  In step S41, it is determined whether or not the control method is 1, and if the current operation is operated in the control method 1, the process proceeds to step S42, and the operation time stored in the RAM in steps S26 and S34 is obtained. When the operation time is shorter than T1 (39 minutes) in step S42, the process proceeds to step S43, the control method 2 is changed, and the process proceeds to step S56. When the operation time is longer than T1 in step S42, the process proceeds to step S57 without changing the control method.

  If the current operation is not operated in the control method 1 in step S41, the process proceeds to step S44. In step S44, it is determined whether the operation of the compressor 18 is the control method 2, and the current operation is controlled. When the system 2 is operated, the process proceeds to step S45, and the operation time stored in the RAM in step S26 and step S34 is compared with T2S (26 minutes) in step S45, and the operation time is shorter than this T2S. Sometimes the process proceeds to step S46, the control method 3 is changed, and the process proceeds to step S56. When the operation time is longer than T2S in step S45, the process proceeds to step S47. In step S47, the operation time stored in the RAM in step S26 and step S34 is compared with T2L (60 minutes) in step S47. When the operation time is longer than T2L, the process proceeds to step S48 to change to the control method 1, and the process proceeds to step S56. When the operation time is shorter than T2L in step S47, the process proceeds to step S57 without changing the control method.

  If the current operation is not operated in the control method 2 in step S44, the process proceeds to step S49. In step S49, it is determined whether or not the operation of the compressor 18 is the control method 3, and the current operation is performed in the control method 3. If the operation time is shorter than this T3S, the process proceeds to step S50 and the operation time stored in the RAM in step S26 and step S34 is compared with T3S (13 minutes) in step S50. The process proceeds to step S51 to change to the control method 4, and the process proceeds to step S56.

  When the operation time is longer than T3S in step S50, the process proceeds to step S52. The operation time stored in the RAM in step S26 and step S34 is compared with T3L (45 minutes) in step S52, and the operation time from this T3L. Is long, the process proceeds to step S53 to change to the control method 2, and the process proceeds to step S56. When the operation time is shorter than T3L in step S52, the process proceeds to step S57 without changing the control method.

If the current operation is not operated in the control method 3 in step S49, the process proceeds to step S54, and the operation time stored in the RAM in step S26 and step S34 is compared with T4 (30 minutes) in step S54. When the operating time is longer than T4, the process proceeds to step S55 to change to the control method 3, and the process proceeds to step S56 to set the control change delay flag and clear the control change delay counter, and the control is performed in step S57. The change start flag is reset, and the process proceeds to step S58.

  In step S39 or step S57, the control change start flag for changing to either control method is reset. In step S58, it is determined whether or not the control change start flag is control method 1. In S59, the operation stop temperature is set to the set value plus 1 ° C., and in Step S60, the differential temperature is set to 3 ° C., and the process proceeds to Step S69.

  If the control change start flag is not the control method 1 in step S58, the process proceeds to step S61. In step S61, it is determined whether the control change start flag is the control method 2. If the control change start flag is the control method 2, the operation stop temperature is determined in step S62. Is set to a set value, the differential temperature is set to 2 ° C. in step S63, and the process proceeds to step S69.

  If the control change start flag is not the control method 2 in step S61, the process proceeds to step S64. In step S64, it is determined whether the control change start flag is the control method 3. If the control change start flag is the control method 3, the operation stop temperature is determined in step S65. Is set to a set value minus 1 ° C., the differential temperature is set to 2 ° C. in step S66, and the process proceeds to step S69.

  If the control change start flag is not output in step S64 in step S64, the process proceeds to step S67. In step S67, the operation stop temperature is set to the set value minus 2 ° C. In step S68, the differential temperature is set to 1 ° C. Control goes to step S69.

  In step S69, it is determined whether or not there is a forced operation flag. If the forced operation flag is set in step S69, the process proceeds to step S77. If the forced operation flag is reset, the process proceeds to step S70 and the compressor. 18 is determined. When the compressor 18 is in operation, the process proceeds to step S71. In step S71, the temperature sensor 19 is compared with the operation stop temperature, and the temperature detected by the temperature sensor 19 is detected. If the temperature is equal to or lower than the operation stop temperature, the process proceeds to step S72 to stop the operation of the compressor 18, the change data acquisition start flag is set in step S73, the continuous operation flag is set in step S74, and the process proceeds to step S1. . If the temperature detected by the temperature sensor 19 in step S71 is equal to or higher than the operation stop temperature, the process proceeds to step S1.

  When the compressor 18 is not operated in step S70, the process proceeds to step S75, the operation start temperature is set in step S75, the temperature sensor 19 is compared with the operation start temperature in step S76, and the temperature sensor 19 detects it. When the temperature to be operated is equal to or higher than the operation start temperature, the process proceeds to step S77 to start the operation of the compressor 18, the stop counter is cleared in step S78, the process proceeds to step S1, and the cycle is repeated.

  As described above, since the temperature setting range of the refrigerator compartment is changed by the temperature control unit 20 based on the fluctuation of the operating rate in the temperature setting range, the optimum temperature setting is set according to the operating rate of the compressor 18. When the outside air temperature is lower than the set temperature, the power supply 28 is turned on or the compressor 18 has not been operated for a certain time or more. The compressor 18 is forced to operate, the compressor is not operated at a low outside temperature such as in winter, and the freezer compartment 9 rises in temperature, or when the refrigerator 1 is installed, the compressor is not operated and the product is treated as a defective product. So that it can be prevented.

  As described above, since the temperature setting range of the refrigerator compartment is changed by the temperature control unit 20 based on the fluctuation of the operating rate in the temperature setting range, the optimum temperature setting is set according to the operating rate of the compressor 18. When the outside air temperature is lower than the set temperature, the power supply 28 is turned on or the compressor 18 has not been operated for a certain time or more. The compressor 18 is forced to operate, the compressor is not operated at a low outside temperature such as in winter, and the freezer compartment 9 rises in temperature, or when the refrigerator 1 is installed, the compressor is not operated and the product is treated as a defective product. So that it can be prevented.

  According to the present invention, the control for determining the operation start temperature for operating the compressor within the predetermined temperature range and the operation stop temperature for stopping the compressor based on the set temperature set by the temperature setting means for setting the temperature of the refrigerator compartment. The operation of the compressor is controlled on the basis of the temperature setting unit, the operation start temperature and the operation stop temperature set by the control temperature setting unit, and the temperature of the refrigerator compartment detected by the temperature detection means for detecting the temperature of the refrigerator compartment. Control means, the operation time and stop time of the compressor is measured by the control means, the operation rate of the compressor is calculated, and the temperature range of the operation start temperature and the operation stop temperature based on the calculated operation rate Therefore, the operating rate of the compressor can be set appropriately, and it is possible to prevent the freezer compartment from being cooled by controlling the temperature of the refrigerator compartment.

  According to the present invention, the control for determining the operation start temperature for operating the compressor within the predetermined temperature range and the operation stop temperature for stopping the compressor based on the set temperature set by the temperature setting means for setting the temperature of the refrigerator compartment. The operation of the compressor is controlled on the basis of the temperature setting unit, the operation start temperature and the operation stop temperature set by the control temperature setting unit, and the temperature of the refrigerator compartment detected by the temperature detection means for detecting the temperature of the refrigerator compartment. Control means, the operation time and stop time of the compressor is measured to calculate the operation rate of the compressor, the temperature range of the operation start temperature and the operation stop temperature based on the calculated operation rate Since the belt is changed and this compressor is forcibly operated when the compressor is turned on and when the compressor is stopped for a certain time or more, the operating rate of the compressor can be set optimally, Outside Temperature can be forcibly operated compressor even when below the set temperature.

  Based on the operating cycle time of the compressor measured by the cycle time measuring unit and the operating rate measured by the operating rate measuring unit, the temperature differential control unit changes the control differential (that is, the predetermined temperature range) of the freezer compartment. As a result, the control differential can be set as appropriate based on the fluctuations in the operation cycle time and the operation rate, and the temperature control of the freezer can be performed more finely than before, and the refrigerating room or ice greenhouse can be used. Therefore, it is possible to provide a control apparatus suitable for fine temperature control of the entire refrigerator.

It is side surface sectional drawing of the refrigerator of this invention. It is a control circuit diagram of the present invention. It is a switching flowchart which shows the flow of a change of the temperature setting range of this invention. It is a flowchart explaining operation | movement of the control apparatus of the refrigerator of this invention. It is a flowchart explaining operation | movement of the control apparatus of the refrigerator of this invention. It is a flowchart explaining operation | movement of the control apparatus of the refrigerator of this invention. It is a flowchart explaining operation | movement of the control apparatus of the refrigerator of this invention. It is a flowchart explaining operation | movement of the control apparatus of the refrigerator of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Refrigerator 10 Refrigeration room 18 Compressor 19 Temperature sensor 20 Temperature control apparatus

Claims (2)

Operation start temperature for operating the compressor within a predetermined temperature range based on the set temperature set by the freezing room, the refrigerating room, and the temperature setting means for setting the temperature of the refrigerating room, and the operation stop for stopping the compressor A control temperature setting unit for determining a temperature; and the operation start temperature and the operation stop temperature set by the control temperature setting unit, and the temperature of the refrigerator compartment based on the temperature detection means for detecting the temperature of the refrigerator compartment. In a refrigerator provided with a control means for controlling the operation of the compressor,
The control means measures the operation time and stop time of the compressor, calculates the operation rate of the compressor, and changes the temperature range of the operation start temperature and the operation stop temperature based on the calculated operation rate. Refrigerator characterized by letting. Operation start temperature for operating the compressor within a predetermined temperature range based on the set temperature set by the freezing room, the refrigerating room, and the temperature setting means for setting the temperature of the refrigerating room, and the operation stop for stopping the compressor A control temperature setting unit for determining a temperature; and the operation start temperature and the operation stop temperature set by the control temperature setting unit, and the temperature of the refrigerator compartment based on the temperature detection means for detecting the temperature of the refrigerator compartment. In a refrigerator provided with a control means for controlling the operation of the compressor,
The control means measures the operation time and stop time of the compressor, calculates the operation rate of the compressor, and changes the temperature range of the operation start temperature and the operation stop temperature based on the calculated operation rate. And a compressor forcibly operating the compressor when the compressor is turned on and when the compressor is stopped for a predetermined time or longer.

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