JP2015152191A - refrigerator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a refrigerator which suppresses increase in interior temperature and prevents dew condensation from attaching to the inside of the refrigerator under a low humidity environment where humidity of outside air is low.SOLUTION: A refrigerator 1 includes: a refrigerator body 2; a cooler 16 for cooling the inside of the refrigerator body 2; a duct 26 for blowing cold air from the cooler 16 to the inside of the refrigerator; a heating device 30 for defrosting for melting frost attached to the cooler 16; a heating device 40 for dew condensation prevention for preventing attaching of dew condensation outside of the refrigerator; a control device 101 for defrosting for controlling the heating device 30 for defrosting; a control device 102 for dew condensation prevention for controlling the heating device 40 for dew condensation prevention; and a switch device 110 for switching drive of the control device for dew condensation prevention. It is configured so as to stop the drive of the heating device 40 for dew condensation prevention while shortening drive time of the heating device 30 for defrosting from the predetermined drive time.

Description

  Embodiments of the present invention relate to a refrigerator.

  In a conventional refrigerator, when the cooler constituting the refrigeration cycle becomes low temperature, frost adheres to the outer surface of the cooler, and it is known that the cooling capacity of the cooler decreases due to the adhesion of frost to the cooler. It has been. Therefore, removing (defrosting) frost adhering to the cooler is important for improving the performance of the refrigerator. For this reason, in order to defrost the frost in the cooler, the cooler is provided with a defrost heater, and the defrost heater melts the frost in the cooler.

  Moreover, the refrigerator currently disclosed by patent document 1 has the external temperature sensor (21) which measures the temperature outside the refrigerator compartment, and the outdoor air humidity sensor (22) which measures the humidity outside the refrigerator compartment. . And a control means is a frost suppression means (rotation threshold heater 24 of a door) according to the humidity measured by the outside air humidity sensor (22) and the temperature measured by the outside air temperature sensor (21) while the compressor is stopped. , By controlling the heat radiating pipe 33) on the back side of the refrigerator, the humidity of the outside air is accurately detected, the quality is stabilized, dew condensation is suppressed, and power saving is achieved.

JP2013-72595A

  However, in the technique of Patent Document 1, since the operation of the defrosting heater for defrosting the frost in the cooler is not taken into consideration, the defrosting suppression unit and the defrosting heater operate simultaneously. Since the frost removal operation by the frost suppression unit and the defrosting of the cooler by the defrosting heater are combined and the temperature in the warehouse rises, the interior becomes temporarily difficult to cool. There is a risk that.

  The present invention has been made in view of the above, and the object of the present invention is to suppress a rise in the temperature in a low humidity environment in which the humidity of the outside air is low, and dew condensation adheres to the internal temperature. It is to provide a refrigerator that can be made difficult.

  The refrigerator according to the embodiment of the present invention includes a refrigerator body, a cooler that cools the inside of the refrigerator body, a duct that blows cool air from the cooler into the warehouse, and frost attached to the cooler. A defrosting electric heating device that melts the defrosting, a dew condensation prevention heating device that prevents dew condensation outside the cabinet, a defrost control device that controls the defrosting heating device, and a control for controlling the dew condensation prevention heating device A dew condensation prevention control device and a switch device for switching the drive of the dew condensation prevention control device, the drive time of the defrosting electric heating device is reduced from a predetermined drive time, and the dew condensation prevention electric heat The apparatus is configured to stop driving the apparatus.

  Further, the refrigerator according to the embodiment of the present invention is attached to the refrigerator body, a cooler that cools the refrigerator body and the interior of the refrigerator, a duct that blows cool air from the cooler into the interior of the warehouse, and the cooler. The defrosting electric heating device for melting the frost, the dewing prevention electric heating device for preventing the dew condensation outside the warehouse, the defrosting control device for controlling the defrosting electric heating device, and the dew condensation prevention electric heating device A dew condensation prevention control device for controlling the dew condensation prevention control device and a switch device for switching the drive of the dew condensation prevention control device, the drive time of the defrosting electric heating device is not shortened from a predetermined drive time, and the dew condensation The present invention is characterized in that the electric heating device for prevention is driven.

It is a perspective view showing the whole refrigerator concerning a 1st embodiment of the present invention. It is a front view which shows the kannon door etc. of the upper part of the refrigerator shown in FIG. It is sectional drawing of the vertical direction of the refrigerator shown in FIG. It is a block diagram which shows the electrical structural example of a refrigerator. It is a flowchart which shows the operation example of a refrigerator. It is a flowchart which shows another operation example of a refrigerator. It is a block diagram which shows the electrical structural example of the refrigerator of 2nd Embodiment of this invention. It is a figure which shows the example at the time of making the drive of the electric heating apparatus for condensation prevention into an ON state, and making it into an OFF state when the temperature of external air and the humidity of external air are considered.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out the present invention (hereinafter referred to as embodiments) will be described with reference to the drawings.

(First embodiment)
FIG. 1 is a perspective view showing an entire refrigerator according to an embodiment of the present invention.

  A refrigerator 1 shown in FIG. 1 has a main body (refrigerator main body) 2 formed of a heat insulating box. A storage compartment is formed inside the heat insulation box of the main body 2, and the storage compartment is divided into a plurality of storage rooms such as a freezing compartment and a refrigeration compartment by a partition wall. The main body 2 has a refrigerated compartment 5 and a vegetable compartment 7 that are refrigerated compartments, an ice making compartment 8, an upper freezer compartment 9 and a freezer compartment 10 that are refrigerated compartments.

  At the uppermost position of the main body 2, there is provided a refrigerator compartment 5 that is opened and closed by double-opening left and right doors 3 and 4. These doors 3 and 4 are attached so as to be openable and closable around the rotation shafts 3A and 4A of the main body 2, respectively. Below the refrigerator compartment 5 is provided a vegetable compartment 7 that is opened and closed by a drawer-type door 7a.

  An ice making room 8 and an upper freezing room 9 are arranged side by side in the lower part of the vegetable room 7. The ice making chamber 8 is opened and closed by a drawer type door 8a, and the upper freezing chamber 9 is opened and closed by a drawer type door 9a. A freezing room 10 is arranged at the lowermost part of the main body 2 and below the ice making room 8 and the upper freezing room 9. The freezer compartment 10 is opened and closed by a drawer type door 10a.

  FIG. 2 is a front view showing the doors 3 and 4 and the like on the upper part of the refrigerator 1 shown in FIG.

  As shown in FIG. 2, for example, an operation unit 50 is disposed on the left door 3. The operation unit 50 includes operation buttons and the like for performing various setting operations when the user touches with a finger. For example, as illustrated in FIG. 1, the operation unit 50 includes an outdoor air humidity threshold setting unit 120. The outside air humidity threshold setting unit 120 is configured to allow the control unit 100 (see FIG. 4) to determine whether the numerical value of the outside air humidity is higher or lower than a predetermined threshold. On the other hand, a predetermined threshold value (a constant value) of the outside air humidity can be input in advance.

  FIG. 3 is a longitudinal sectional view of the refrigerator 1 shown in FIG.

  As shown in FIG. 3, the vegetable room 7 is located in the lower part of the refrigerator room 5 in the main body 2. An ice making room 8 and an upper freezer room 9 are arranged at the lower part of the vegetable room 7, and a freezer room 10 is arranged at the lowermost part. A cold air passage 11 is provided at the back of the refrigerator compartment 5 and the vegetable compartment 7. The refrigerated compartment and the freezer compartment are separated and insulated. In the main body 2, a cooling fan 13 and a refrigeration cooler 14 are disposed on the back of the refrigerator compartment 5 and the vegetable compartment 7. The cooling fan 13 is rotated by a fan motor. A duct 25 is provided in the vicinity of the cooling fan 13.

  In the main body 2, a cooling fan 15 and a refrigeration cooler 16 are disposed behind the ice making chamber 8, the upper freezing chamber 9, and the freezing chamber 10. The cooling fan 15 is rotated by a fan motor. In the vicinity of the cooling fan 15, a duct 26 is provided for guiding the cool air generated by the cooler 16 to the ice making chamber 8, the upper freezing chamber 9, and the freezing chamber 10.

  A compressor (compressor, not shown) or the like is disposed in the machine chamber 17 below the main body 2. The compressor has a refrigerator compartment and a freezer compartment by coolers 14 and 16, a condenser 18 and the like. A refrigeration cycle for cooling is configured.

  As shown in FIG. 3, for example, one of the doors 3 and 4 is provided with a humidity sensor 21. The humidity sensor 21 is provided at the upper position of any one of the doors 3 and 4, but the position to be provided is not particularly limited. This humidity sensor 21 detects the humidity of the outside air (outdoor humidity) in the room environment where the refrigerator 1 is installed.

  As shown in FIG. 3, a dew condensation prevention electric heating device (condensation prevention electric heater) 40 is disposed on the inner surface of the door of the door 3 facing the door 4. Partition portions 3S and 4S are formed between the doors 3 and 4, respectively. The partition portions 3S and 4S are a part of a plastic inner box formed so as to protrude inside the refrigerator compartment 5. The vicinity of the partition portions 3S and 4S is exposed to the outside air when the user opens and closes the doors 3 and 4. Since the temperature in the refrigerator compartment 5 is a refrigeration temperature, the partition parts 3S and 4S may become below the dew point temperature of external air, and the water | moisture content in external air may condense on the partition parts 3S and 4S. For this reason, the dew condensation prevention electric heating device 40 is disposed in the vicinity of the partition portions 3S, 4S, and when energized, the temperature in the vicinity of the partition portions 3S, 4S is made higher than the dew point temperature of the outside air, Prevents condensation from occurring.

  In addition, a defrosting electric heating device (defrosting heater) 30 is arranged in the cooler 16 shown in FIG. The defrosting electric heating device 30 is provided to melt and remove frost attached to the cooler 16. When the cooler 16 constituting the refrigeration cycle becomes a low temperature, frost adheres to the outer surface of the cooler 16, but the cooling capacity of the cooler decreases due to the adherence of frost to the cooler 16. Therefore, in order to defrost the frost in the cooler 16, the cooler 16 is provided with the defrosting electric heating device 30, and the defrosting electric heating device 30 melts the frost in the cooler 16.

  FIG. 4 is a block diagram illustrating an electrical configuration example of the refrigerator 1.

  As shown in FIG. 4, the refrigerator 1 has a control unit 100, and this control unit 100 is arranged at a predetermined position of the main body 2 shown in FIG. The control unit 100 includes a processing unit 90, a defrost control device 101, and a dew condensation prevention control device 102. The humidity sensor 21 is connected to the processing unit 90. The humidity sensor 21 detects the humidity of the outside air and sends the humidity signal SH of the outside air to the processing unit 90. The processing unit 90 receives the outside air from the humidity signal SH of the outside air. Get the humidity value of.

  As shown in FIG. 4, the defrosting control device 101 causes the defrosting electric heating device 30 to generate heat (drive) for a predetermined driving time by sending a predetermined current SC, or to remove the defrosting electric heating device. It is possible to generate heat (drive) by shortening the drive time of 30 heat generation (drive) from a predetermined drive time.

  As shown in FIG. 4, the dew condensation prevention control device 102 sends a current SR to the switch device 110 and sends an on / off switching signal CS to the switch device 110. Accordingly, the switch device 110 is turned on when receiving the ON switching signal CS, and sends the drive current SR from the dew condensation prevention control device 102 to the dew condensation prevention heating device 40 through the switch device 110, thereby preventing dew condensation. The electric heating device 40 can generate heat (drive).

  Further, the switch device 110 is turned off when receiving the off switching signal CS, and the drive current SR cannot be sent from the dew condensation prevention control device 102 to the dew condensation prevention heating device 40 through the switch device 110, thereby preventing dew condensation. Heat generation (driving) of the electrical heating device 40 can be stopped. As described above, the switch device 110 can turn on or off the drive operation (heat generation operation) of the dew condensation prevention heating device 40.

  Next, an operation example of the refrigerator 1 will be described with reference to the flowchart of FIG.

  First, in step S <b> 1 of FIG. 5, the humidity sensor 21 shown in FIG. 4 detects the humidity of the outside air and sends the humidity signal SH of the outside air to the processing unit 90 of the control unit 100. In the control unit 100, when the processing unit 90 determines that the humidity of the outside air is not more than a predetermined value (threshold value) based on the humidity signal SH of the outside air (determined that the humidity of the outside air is low), in step S2, The defrosting control device 101 causes the defrosting electric heating device 30 to generate heat for a driving time shorter than a predetermined driving time by sending a driving current SC. Moreover, in step S3, the switch device 110 of FIG. 4 is turned off in response to the OFF switching signal CS, and sends the drive current SR from the dew condensation prevention control device 102 to the dew condensation prevention electric heating device 40 through the switch device 110. The heat generation (driving) of the dew condensation prevention electric heating device 40 is stopped.

  Thereby, when the humidity of the outside air is equal to or less than a predetermined value (threshold value) based on the frequency of the outside air humidity of the refrigerator 1, the driving time of the defrosting electric heating device 30 is set to a predetermined driving time. Since the defrosting time is shortened by driving shorter than the time and the driving of the dew condensation prevention electric heating device 40 is stopped, the operation of the dew condensation prevention electric heating device 40 is performed in a low humidity environment where the humidity of the outside air is low. It can stop and make it hard to raise the temperature in a store | warehouse | chamber and it can make it hard to form dew condensation in a store | chamber interior.

  Further, in step S1 of FIG. 5, the control unit 100 determines that the processing unit 90 determines that the outside air humidity exceeds a predetermined value (threshold) based on the outside air humidity signal SH (if the outside air humidity is high). Then, in step S4, the defrosting control device 101 sends the driving current SC to cause the defrosting electric heating device 30 to generate heat for a predetermined driving time, that is, to generate heat without shortening the driving time. . In addition, in step S5, the switch device 110 is turned on when receiving the ON switching signal CS, and sends the drive current SR from the dew condensation prevention control device 102 to the dew condensation prevention electric heating device 40 through the switch device 110. The electric heating device 40 for preventing condensation is heated (driven).

  Thereby, on the basis of the frequency of the humidity of the outside air of the refrigerator 1, when the humidity of the outside air exceeds a predetermined value (threshold), the driving time of the defrosting electric heating device 30 is set to the predetermined driving time. The defrosting time is not shortened by driving, and the driving of the dew condensation preventing electric heating device 40 is performed without stopping. In other words, in an environment where the humidity of the outside air is high, the driving time of the defrosting electric heating device 30 is not shortened and the electric heating device 40 for preventing condensation is driven. In other words, a low humidity environment where the humidity of the outside air is low. The operation of the dew condensation prevention electric heating device 40 can be stopped below to make it difficult to raise the temperature in the cabinet, and it is possible to prevent condensation from adhering to the inside of the cabinet.

  When the humidity of the outside air is equal to or lower than a predetermined value, when the driving of the dew condensation prevention electric heating device 40 of FIG. 4 is stopped in step S3 of FIG. The temperature guarantee operation is stopped. The temperature guarantee operation in the cabinet is to stop the operations of the vegetable room heater, the water supply heater, etc. in the refrigerator compartment, for example. As a result, if the humidity outside the warehouse is below a predetermined value, the temperature inside the warehouse is raised by stopping the temperature guarantee operation inside the warehouse at the same time as the operation of the dew condensation prevention heating device 40 is stopped. It is possible to prevent condensation from adhering to the inside of the cabinet.

  Furthermore, when the humidity of the outside air is equal to or lower than a predetermined value, when the driving of the dew condensation prevention electric heating device 40 is stopped in step S3 of FIG. 5, the defrosting control device 101 performs the defrosting electric heating device. The period for generating 30 heats (driving) is extended. If the humidity of the outside air is below a predetermined value, the environment should be difficult to condense. For this reason, the defrosting control device 101 sets the driving cycle of the defrosting electric heating device 30 (empty time during which no energization is performed from the energization of the driving current to the energization of the next driving current) as the length of the predetermined driving cycle. By extending the length, the defrosting time is reduced. That is, by extending the driving cycle of the defrosting electric heating device 30, it is possible to reduce the defrosting time (the driving time of the defrosting electric heating device 30) and the frequency of performing the defrosting operation. Thereby, power saving of the refrigerator 1 can be achieved.

  Furthermore, when the humidity of the outside air is equal to or lower than a predetermined value, when the driving of the dew condensation prevention control device 40 is stopped in step S3 of FIG. 5, the operating temperature range in the cabinet can be expanded. If the humidity of the outside air is below a predetermined value, the environment should be difficult to condense. For this reason, the operating temperature range in a warehouse can be expanded and the operating rate of a compressor (compressor) can be reduced. Thereby, power saving of the refrigerator 1 can be achieved.

  FIG. 6 is a flowchart showing another operation example of the refrigerator 1.

  The user operates the humidity threshold setting unit 120 of the operation unit 50 shown in FIG. 2 to determine whether the outside air humidity value is high or low with reference to a predetermined threshold. In order to be able to determine the reference), a predetermined threshold value of the outside air humidity (a constant value) is input to the control unit 100 so that the user determines the constant value of the outside air humidity. Can do.

  In step S <b> 11 of FIG. 6, the humidity sensor 21 shown in FIG. 4 detects the humidity of the outside air and sends the humidity signal SH of the outside air to the processing unit 90. In the control unit 100, based on the outside air humidity signal SH, the processing unit 90 determines that the environment is likely to condense when the outside air humidity exceeds a predetermined threshold value (a constant value), and proceeds to step S12. .

  In step S12, in order to prevent dew condensation, the dew condensation prevention control device 102 shown in FIG. 4 sends a drive current SR to the switch device 110, and the switch device 110 turns on when receiving an on switching signal CS. Thus, the dew condensation prevention electric heating device 40 can be heated (driven) by sending the drive current SR from the dew condensation prevention control device 102 to the dew condensation prevention electric heating device 40 through the switch device 110.

  On the other hand, when the control unit 100 determines in step S11 in FIG. 6 that the humidity of the outside air is equal to or lower than a predetermined value (threshold value), that is, an environment in which condensation does not occur, the switch device 110 is turned off. The switching signal CS is received. As a result, the drive current SR cannot be sent from the dew condensation prevention control device 102 to the dew condensation prevention electric heating device 40 through the switch device 110, and the heat generation (drive) of the dew condensation prevention electric heating device 40 is stopped.

  In step S14 of FIG. 6, the control unit 100 determines whether or not the activation condition of the defrosting electric heating device 30 is satisfied, and proceeds to step S15 if satisfied. In step S14, if the control unit 100 determines that the activation condition of the defrosting electric heating device 30 is not satisfied, the process returns to step S11.

  In step S15, if the driving of the dew condensation prevention electric heating device 40 is turned on in step S12, it is an environment in which condensation is likely to occur. Therefore, in step S16, the defrosting electric heating device 30 is set to a normal predetermined driving time ( The defrosting of the cooler 16 is performed in (defrosting time).

  On the other hand, in step S15, if the driving of the dew condensation prevention electric heating device 40 is not on but off in step S12, it is an environment in which dew condensation is difficult. Therefore, in step S17, the defrosting electric heating device 30 is set in advance as usual. The cooler 16 is defrosted with a driving time (defrosting time) that is shorter than a predetermined driving time (defrosting time).

  As a result, in a low humidity environment where the humidity of the outside air is lower than a predetermined humidity (threshold value) in advance, the operation of the dew condensation prevention electric heating device 40 is stopped to make it difficult to raise the temperature in the cabinet, and condensation is formed in the cabinet. It can be made difficult to adhere.

Further, when the user wants to surely prevent condensation, the processing unit 90 is informed that the humidity is always high and the condensation is likely to occur unless the humidity is 0% by setting the threshold value to 0%. Judgment can be made. On the other hand, if the user does not want to prevent condensation very much, the threshold value is set to 100%, and the humidity is always low except when the humidity is 100%. Judgment can be made. Thereby, the user can substantially control the driving of the electric heating device 40 for preventing condensation from the input of the threshold value of the user. Note that instead of the user inputting a threshold value, the user may be able to select switching on and off of the switch device 110.
(Second Embodiment)
FIG. 7 is a block diagram showing an example of the electrical configuration of the refrigerator according to the second embodiment of the present invention.

  The block diagram of the second embodiment shown in FIG. 7 is different from the block diagram of the first embodiment shown in FIG. 4 in that a temperature sensor 200 for detecting the temperature of the outside air is added, and the other configuration. Are the same. The temperature sensor 200 is provided, for example, at the upper position of any one of the doors 3 and 4 similarly to the humidity sensor 21, but the position to be provided is not particularly limited. The temperature sensor 200 can detect the temperature of outside air (outside temperature) in the room environment where the refrigerator 1 is installed. In this way, by allowing the temperature of the outside air of the refrigerator 1 to be detected, the operation of the defrosting heating device 30 and the dew condensation prevention heating device 40 in consideration of not only the humidity of the outside air but also the temperature of the outside air. Can be controlled.

  FIG. 8 shows an example in which the driving of the dew condensation prevention electric heating device 40 is turned on and turned off in consideration of only the outside air humidity or both the outside air temperature and the outside air humidity. Yes.

  As illustrated in FIG. 8, when the processing unit 90 illustrated in FIG. 4 or the processing unit 90 illustrated in FIG. 7 determines that the humidity of the outside air is, for example, 40% or more by the humidity sensor 21, the dew condensation prevention control device 102 is Assuming that the environment is likely to cause dew condensation, the dew condensation prevention electric heating device 40 is turned on and driven. However, if the processing unit 90 determines that the state continues for, for example, 2 hours in a state where the humidity of the outside air is 0% or more and less than 30%, the dew condensation prevention electric heating device 40 is turned off because it is difficult to condense. Stop driving.

  Further, when the processing unit 90 determines that the state continues for, for example, 4 hours in a state where the humidity of the outside air is 30% or more and less than 40%, it is assumed that the dew condensation prevention control device 102 is an environment in which dew condensation is difficult. The electric heating device 40 for preventing condensation is turned off to stop driving.

  Furthermore, as illustrated in FIG. 8, for example, when the processing unit 90 illustrated in FIG. 7 determines that the temperature of the outside air obtained by the temperature sensor 200 is, for example, 15 ° C. or higher, the dew condensation preventing electric heating device 40 is in principle. Turn on and drive.

  However, depending on the value of the humidity of the outside air obtained by the humidity sensor 21, the dew condensation prevention control device 102 uses the switch device 110 to drive the dew condensation prevention electric heating device 40 on or off. It can be prevented from driving.

  For example, if the humidity of the outside air is a slightly high humidity exceeding, for example, 70%, the dew condensation preventing electric heating device 40 is turned on regardless of the temperature of the outside air. If the humidity of the outside air is determined to be 100%, the dew condensation prevention electric heating device 40 is always turned on regardless of the temperature of the outside air. On the other hand, if the humidity of the outside air is determined to be 0%, the dew condensation preventing electric heating device 40 is always turned off regardless of the temperature of the outside air. If the humidity of the outside air is 40% or more and 70% or less, it is possible to determine whether to turn on or off the dew condensation prevention heating device 40 in relation to the temperature of the outside air.

  The refrigerator of the embodiment of the present invention includes a refrigerator main body, a cooler that cools the interior of the refrigerator main body, a duct that blows cool air from the cooler into the refrigerator, and a defrost that melts frost attached to the cooler. An electrical heating device, an anti-condensation heating device that prevents dew condensation outside the cabinet, a defrosting control device that controls the defrosting heating device, and a dew condensation prevention control device that controls the condensation prevention heating device And a switch device that switches the drive of the dew condensation prevention control device. The drive time of the defrosting heating device is reduced from a predetermined drive time, and the drive of the condensation prevention heating device is stopped.

  Thereby, in a low humidity environment where the humidity of the outside air is low, it is possible to suppress an increase in the temperature in the warehouse and to prevent condensation from adhering to the inside of the warehouse. That is, in a low-humidity environment where the humidity of the outside air is lower than the predetermined humidity of the outside air, the driving time of the defrosting electric heating device that hardly forms frost on the cooler is shortened from the predetermined driving time. Occasionally, the drive of the electric heater for preventing condensation for preventing the adhesion of condensation outside the warehouse is stopped. For this reason, in a low-humidity environment where the humidity of the outside air is low, an increase in the internal temperature can be suppressed, the internal temperature can be easily cooled, and an environment in which condensation does not easily adhere to the internal can be achieved.

  Moreover, the refrigerator of the embodiment of the present invention melts the refrigerator main body, the cooler that cools the refrigerator main body and the interior of the refrigerator, the duct that blows cool air from the cooler into the interior of the refrigerator, and the frost attached to the cooler. Defrosting electric heating device, anti-condensation heating device for preventing dew condensation outside the cabinet, defrosting control device for controlling defrosting heating device, and anti-condensation control for controlling dew condensation heating device And a switch device that switches the drive of the dew condensation prevention control device, and is configured to drive the dew condensation prevention heat heating device without reducing the drive time of the defrosting heat heating device from a predetermined drive time. .

  Thereby, in a low humidity environment where the humidity of the outside air is low, it is possible to suppress an increase in the temperature in the warehouse and to prevent condensation from adhering to the inside of the warehouse. That is, in an environment where the humidity of the outside air is higher than the predetermined humidity of the outside air, the cooler is likely to form frost, so the driving time of the defrosting electric heating device is not shortened from the predetermined driving time in advance. The driving is performed for a predetermined driving time, and at this time, the driving of the dew condensation prevention electric heating device is performed without stopping the driving of the dew condensation prevention electric heating device for preventing the adhesion of dew condensation outside the chamber. For this reason, in other words, in a low humidity environment where the humidity of the outside air is low, it is possible to suppress an increase in the temperature inside the cabinet, and the temperature inside the cabinet can be easily cooled, so that condensation does not easily adhere to the inside of the cabinet. Can do.

  In the refrigerator of the embodiment of the present invention, when the drive of the dew condensation prevention control device is stopped, the temperature guarantee operation in the refrigerator is stopped. The inside temperature guarantee operation is, for example, an operation of stopping the operation of the vegetable room heater, the water supply port heater, etc. in the refrigerator compartment. As a result, if the humidity outside the storage is below a predetermined value, the internal temperature is also low. It is possible to suppress the rise in the temperature in the cabinet and make it difficult for condensation to adhere to the inside of the cabinet.

  In the refrigerator of the embodiment of the present invention, when driving of the dew condensation prevention control device is stopped, the cycle for driving the defrosting electric heating device is extended. Thereby, by extending the drive cycle of the defrosting electric heating device, it is possible to increase the time during which the driving of the defrosting electric heating device is stopped, and to reduce the defrosting time and the frequency of performing the defrosting operation. . For this reason, power saving of the refrigerator can be achieved.

  In the refrigerator of the embodiment of the present invention, when the drive of the dew condensation prevention control device is stopped, the operating temperature range in the refrigerator is expanded. Thereby, in this case, since it should be an environment in which condensation does not occur, the operating temperature range in the warehouse can be expanded, and the operating rate of the compressor (compressor) can be reduced. For this reason, power saving of the refrigerator can be achieved.

  As mentioned above, although embodiment of this invention was described, embodiment is shown as an example and is not intending limiting the range of invention. The novel embodiment can be implemented in various other modes, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

  Each embodiment of the present invention mentioned above can be combined arbitrarily. Moreover, the structure of the refrigerator 1 shown in FIG. 1 is an example, and can employ | adopt arbitrary structures.

DESCRIPTION OF SYMBOLS 1 Refrigerator 2 Main body 16 Cooler 21 Humidity sensor 26 Duct 30 Defrosting electric heating device 40 Condensation prevention electric heating device 100 Control unit 101 Defrosting control device 102 Condensation prevention control device 110 Switch device

Claims (5)

The refrigerator body,
A cooler for cooling the inside of the refrigerator body;
A duct for blowing cool air from the cooler into the cabinet;
An electric heating device for defrosting that melts frost adhering to the cooler;
An anti-condensation heating device that prevents adhesion of condensation outside the cabinet;
A defrosting control device for controlling the defrosting electric heating device;
A dew condensation prevention control device for controlling the dew condensation prevention electric heating device;
A switch device for switching the drive of the dew condensation prevention control device,
A refrigerator characterized in that the driving time of the defrosting electric heating device is shortened from a predetermined driving time and the driving of the dew condensation prevention heating device is stopped. The refrigerator body,
A cooler for cooling the refrigerator body and the interior of the refrigerator;
A duct for blowing cool air from the cooler into the cabinet;
An electric heating device for defrosting that melts frost adhering to the cooler;
An anti-condensation heating device that prevents adhesion of condensation outside the cabinet;
A defrosting control device for controlling the defrosting electric heating device;
A dew condensation prevention control device for controlling the dew condensation prevention electric heating device;
A switch device for switching the drive of the dew condensation prevention control device,
A refrigerator characterized in that the driving time of the defrosting electric heating device is not shortened from a predetermined driving time, and the condensation prevention electric heating device is driven.   The refrigerator according to claim 1 or 2, wherein when the drive of the dew condensation prevention control device is stopped, the temperature guarantee operation in the cabinet is stopped.   The refrigerator according to any one of claims 1 to 3, wherein a period for driving the defrosting electric heating device is extended when driving of the dew condensation prevention control device is stopped.   The refrigerator according to any one of claims 1 to 4, wherein when the drive of the dew condensation prevention control device is stopped, the operating temperature range in the cabinet is expanded.

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