JP5656494B2 - refrigerator - Google Patents

Description

  Embodiments described herein relate generally to a refrigerator.

  If the door of the storage chamber is opened and closed when the temperature in the storage chamber becomes lower than the temperature of the outside air using the refrigerator, condensation may be generated on the vertical partition member or the side wall in the storage chamber. In order to prevent the generation of this dew condensation, for example, in Patent Document 1, a dew proof heater is provided in the vicinity of the storage room where the dew condensation is likely to be generated.

JP 2004-353972 A

However, conventionally, the dew proof heater may be driven with a large output even at a temperature at which condensation is not easily generated. Therefore, there is a problem that wasteful power consumption occurs.
Therefore, a refrigerator is provided that can prevent condensation from forming in the storage room and can reduce power consumption used for preventing condensation as much as possible.

The refrigerator of the present embodiment includes a refrigerator main body having a storage chamber whose front surface is open, a storage chamber door that opens and closes the front surface of the storage chamber, a storage chamber temperature sensor that detects the temperature of the storage chamber, and the refrigerator main body. A refrigerating cycle apparatus comprising a refrigerating cycle having an outside air temperature sensor for detecting the temperature of the outside air, a compressor, a condenser, and a refrigerating evaporator for generating cold air for cooling the storage chamber, and the refrigerating cycle A state of a refrigeration cooling operation that is provided between the compressor of the apparatus and the refrigeration evaporator and supplies the refrigerant supplied from the compressor via the condenser to the refrigeration evaporator by opening and closing a valve. And a switching valve for switching to a state of non-refrigeration cooling operation in which the refrigerant supplied from the compressor via the condenser is not supplied to the refrigeration evaporator, a position in contact with outside air, and the storage chamber Ma Is an outside air contact portion provided in a nearby position, a heating means for heating the outside air contact portion, and the detection result of the storage chamber of the storage chamber temperature sensor so that the detection result of the storage chamber is within a predetermined temperature range. Control means for controlling driving and switching the state of the switching valve to adjust the flow of refrigerant supplied to the refrigeration evaporator, and cold air generated by the refrigeration evaporator controlled by the control means A refrigeration blower that generates wind for supplying the storage compartment to the storage compartment, and is configured to stop the drive when the storage compartment door is opened while the refrigeration blower fan is being driven. And a fan .

The control means sets the energization rate of the heating means to a predetermined value based on the detection result of the outside air temperature sensor, and the energization rate of the heating means is condensed on the outside air contact portion during the refrigeration cooling operation. In the non-refrigerated cooling operation, the energization rate of the heating means is set to a value that does not generate condensation in the outside air contact portion and the same outside air temperature detection result is set. The value of the second mode, which is smaller than the value of the first mode, is set , and after the refrigeration cooling operation state is switched to the non-refrigeration cooling operation state, the refrigeration fan is stopped from the driving state. When switching to a state, the energization rate of the heating means is switched from the value of the first mode to the value of the second mode .

A longitudinal side view showing a schematic configuration of the entire refrigerator according to the first embodiment. It is a schematic cross-sectional top view which expands and shows the refrigerator door vicinity, (a) is a figure which shows the state in which the refrigerator door was closed, (b) is the figure in the state in which the refrigerator left door was opened. (C) is the figure of the state where the right door for refrigerator compartments opened. Diagram showing the refrigeration cycle Block diagram showing electrical configuration The figure which shows the relationship between the temperature of outside air and the energization rate of the heater Flow chart showing control of dew proof heater The figure which shows the relationship between the temperature of a store room, each cooling operation, the drive of the ventilation fan for refrigeration, and the mode of electricity supply of a dew-proof heater FIG. 6 equivalent view showing the control of the dew proof heater of the second embodiment.

  Hereinafter, the refrigerator of several embodiment is demonstrated with reference to drawings. In addition, in each embodiment, the same code | symbol is attached | subjected to the substantially same component and description is abbreviate | omitted. Moreover, the door side (for example, the left side in FIG. 1) is demonstrated as a front surface with respect to the refrigerator main body.

(First embodiment)
First, a first embodiment will be described with reference to FIGS. As shown in FIG. 1, the refrigerator body 1 has a plurality of storage chambers arranged in a vertical direction in a vertically long rectangular box-shaped heat insulation box 2 having an open front surface. Specifically, in the heat insulation box 2, a refrigeration room 3 and a vegetable room 4 are provided in order from the top as a storage room having an open front, and an ice making room (not shown) and a small freezer room are provided below the storage room. 5 are arranged side by side, and the freezer compartment 6 is provided below these. A well-known automatic ice making device (not shown) is provided in an ice making chamber (not shown). The heat insulating box 2 is basically composed of a steel plate outer box 2a, a synthetic resin inner box 2b, and a heat insulating material 2c provided between the outer box 2a and the inner box 2b. Yes.

The refrigeration room 3 and the vegetable room 4 are both storage rooms having a refrigeration temperature zone of 1 to 4 ° C., for example, and the refrigeration room 3 and the vegetable room 4 are partitioned vertically by a plastic partition wall 7. .
As shown in FIG. 2, a so-called double door type refrigerator door 8 of a hinged opening / closing type that opens and closes the opening of the front surface of the refrigerator compartment 3 is provided at the opening of the refrigerator compartment 3. That is, the refrigerator compartment door 8 is a door that is pivotally supported on both the left and right sides of the front opening of the refrigerator compartment 3 to open and close the front opening. The refrigerator compartment door 8 functions as a storage compartment door, and includes a refrigerator compartment left door 9 having heat insulation properties and a refrigerator compartment left door 10 having insulation properties. The refrigeration room left door 9 is a door that opens and closes the left half of the front opening of the refrigeration room 3, and the refrigeration room right door 10 is a door that opens and closes the right half of the front opening of the refrigeration room 3.

  A left door hinge (not shown) is provided at the left end of the refrigerator compartment left door 9. This left door hinge (not shown) is attached to the left side of the front opening of the refrigerator compartment 3. Thereby, as shown in FIG. 2A and FIG. 2B, the refrigerator compartment left door 9 is rotatable (rotatable) about a left door hinge (not shown). A frame-like left door packing 11 is provided on the outer peripheral portion of the back side of the refrigerator compartment left door 9, that is, the surface of the refrigerator compartment 3 side.

  A vertical partition hinge 12 is provided on the inner peripheral side of the left door packing 11 and on the right end side of the refrigerator door left door 9 in the rear surface of the refrigerator door left door 9. A vertical partition member 13 is provided on the vertical partition hinge 12. The vertical partition member 13 is provided on the side opposite to the pivot side (the left door hinge side (not shown)) of one door of the refrigerator compartment door 8 (in this case, the refrigerator door left door 9) which is a double door. It attaches and closes between the left door 9 for refrigerator compartments, and the right door 10 for refrigerator compartments by rotating according to the opening / closing operation | movement of the left door 9 for refrigerator compartments. Specifically, the vertical partition member 13 has a plate shape that is long in the vertical direction, the upper end extends to the upper end of the opening on the front face of the refrigerator compartment 3, and the lower end is the lower end of the opening on the front face of the refrigerator compartment 3. It extends to. As shown in FIG. 2A, the horizontal width of the vertical partition member 13 is larger than the gap between the left door 9 for the refrigerator compartment and the right door 10 for the refrigerator compartment, and a frame is formed on the front surface of the vertical partition member 13. The right side of the cylindrical left door packing 11 and the left side of the frame-like right door packing 14 described later can contact each other.

  The vertical partition member 13 is provided at a position where it can come into contact with outside air and in the storage room or in the vicinity of the storage room. The vertical partition member 13 of this embodiment is located on the back side of the refrigerator body 1 relative to the refrigerator compartment door 8 when the refrigerator compartment left door 9 is closed, that is, in the refrigerator compartment 3, and the refrigerator compartment 3. Is located at the center in the left-right direction of the opening on the front side. With this configuration, the vertical partition member 13 is easily cooled by the cold air that cools the refrigerator compartment 3. Further, when at least one of the refrigeration room left door 9 and the refrigeration room right door 10 is opened, the vertical partition member 13 is more than when the refrigeration room left door 9 and the refrigeration room right door 10 are closed. It will come into further contact with the outside air. Note that the outside air is generally higher in temperature and humidity than cold air. Thus, since the vertical partition member 13 is provided in a place where the temperature difference is large, when outside air contacts when the surface of the vertical partition member 13 is cold, condensation is likely to be generated on the surface. In particular, the higher the temperature and humidity of the outside air, the easier it is for condensation to form on the vertical partition member 13. In this embodiment, the vertical partition member 13 will be described as an outside air contact portion.

  A right door hinge (not shown) is provided at the right end of the refrigerator compartment right door 10. This unillustrated right door hinge is attached to the right side of the front opening of the refrigerator compartment 3. Thereby, as shown in FIG. 2 (a) and FIG.2 (c), the right door 10 for refrigerator compartments can rotate (rotate | rotate) centering on the hinge for right doors which is not shown in figure. The right door packing 14 described above is provided on the back side of the right door 10 for the refrigerator compartment, that is, around the surface on the refrigerator compartment 3 side.

  According to the configuration of the refrigeration room door 8, as shown in FIG. 2A, when the refrigeration room left door 9 is closed, the left door packing 11 hits the front surface of the vertical partition member 13, and the refrigeration is performed. The space between the room left door 9 and the vertical partition member 13 is closed by the right side of the left door packing 11. Further, when the right door 10 for the refrigerator compartment is closed, the right door packing 14 hits the front surface of the vertical partition member 13, and the space between the right compartment door 10 and the vertical partition member 13 is the right door packing 14. The left side is closed. Thus, the gap between the refrigerator compartment left door 9 and the refrigerator compartment door 10 is sealed by the vertical partition member 13, the left door packing 11 and the right door packing 14.

  When the left door 9 for refrigeration room is opened from the state where the left door 9 for refrigeration room and the right door 10 for refrigeration room are closed, that is, when the left door 9 for refrigeration room is pulled ahead, it will be in FIG.2 (b). As shown, the vertical partition member 13 rotates around the vertical partition hinge 12 and rotates counterclockwise in FIG. 2B, and the refrigerator compartment left door 9 centers around the left door hinge (not shown). Rotation, clockwise in FIG. 2 (b). Thereby, the left door 9 for refrigerator compartments will be in the open state, and the vertical partition member 13 will come into further contact with external air. On the other hand, when the refrigeration room left door 9 and the refrigeration room right door 10 are closed, when the refrigeration room right door 10 is pulled forward, as shown in FIG. 10 rotates around a hinge for a right door (not shown), and rotates counterclockwise in FIG. Thereby, the right door 10 for refrigerator compartments will be in the open state, and the vertical partition member 13 will come into further contact with outside air.

  A refrigerator door opening / closing sensor 15 (see FIG. 4) is provided at the opening on the front surface of the refrigerator compartment 3 of the refrigerator body 1. The refrigerator compartment door opening / closing sensor 15 detects the opening / closing of the refrigerator compartment door 8, and includes, for example, a micro switch, a reed switch, or the like. When the refrigerating room door opening / closing sensor 15 includes a reed switch, a magnet for switching the on / off state of the reed switch is provided in the refrigerating room door 8. In this embodiment, when the refrigerator compartment door 8 is closed, the refrigerator compartment door opening / closing sensor 15 outputs an ON signal, and when the refrigerator compartment door 8 is open, the refrigerator compartment door opening / closing sensor 15 is output. Is assumed to output a signal of OFF.

  As shown in FIG. 2, the vertical partition member 13 has a vertical center which is an outside air contact portion in the center on the front side, that is, the portion corresponding to the space between the left door 9 for the refrigerator compartment and the right door 10 for the refrigerator compartment. A heating means for heating the partition member 13, for example, a dew proof heater 16 is provided extending in the vertical direction. The dew proof heater 16 is a heater that prevents the formation of condensation on the vertical partition member 13, particularly the front surface of the vertical partition member 13, as a part that is easily in contact with the outside air. The dew proof heater 16 will be described later.

As shown in FIG. 1, the inside of the refrigerator compartment 3 is divided into a plurality of stages by a plurality of shelf plates 21. A chilled chamber 22 is provided on the right side at the lowest level in the refrigerator compartment 3, that is, the upper part of the partition wall 7, and an egg case (not shown), an accessory case (not shown), etc. are provided on the left side. Yes.
A drawer-type vegetable compartment door 23 having heat insulation is provided at the opening on the front surface of the vegetable compartment 4. A lower case 24 constituting a storage container is connected to the back side of the vegetable room door 23. An upper case 25 that is smaller than the lower case 24 is provided at the rear of the upper portion of the lower case 24.

  The small freezer compartment 5, the freezer compartment 6, and the ice making chamber (not shown) are all storage rooms in a freezing temperature zone of, for example, −10 to −20 ° C. Further, the vegetable compartment 4, the small freezer compartment 5, and an ice making chamber (not shown) are partitioned vertically by a heat insulating partition wall 26 as shown in FIG. At the opening on the front surface of the small freezer compartment 5, a drawer type small freezer compartment door 27 having heat insulation connected to a storage container is provided. A drawer-type freezer compartment door 28 having a heat insulating property connected to a storage container is also provided at the front opening of the freezer compartment 6. In addition, a drawer-type ice making room door (not shown) having heat insulating properties is also provided at an opening on the front surface of the ice making room (not shown).

A freezer compartment door opening / closing sensor 29 (see FIG. 4) is provided at the opening of the front surface of the freezer compartment 6 of the refrigerator body 1. The freezer compartment door opening / closing sensor 29 detects the opening / closing of the freezer compartment door 28, and has the same configuration as the refrigerator compartment door opening / closing sensor 15. In this embodiment, when the freezer compartment door 28 is closed, the freezer compartment door open / close sensor 29 outputs an ON signal, and when the freezer compartment door 28 is open, the freezer compartment door open / close sensor 29 is output. Is assumed to output a signal of OFF.
The temperature setting of each of the storage chambers 3 to 6 is performed by operating the operation panel 31 provided on the front surface of the refrigerator compartment door 8. The operation panel 31 is provided with an outside air temperature sensor 32. The outside air temperature sensor 32 measures the temperature of outside air outside the refrigerator, and is composed of, for example, a temperature sensitive resistance element such as a thermistor.

  Although not shown in detail, the refrigerator main body 1 is provided with a refrigeration cycle apparatus 35 having a refrigeration evaporator 33 and a refrigeration evaporator 34 and constituting a refrigeration cycle. The refrigeration evaporator 33 generates cold air for cooling the refrigeration room 3 and the vegetable room 4, and is provided on the back surface of the refrigerator body 1. The freezing evaporator 34 generates cold air for cooling the small freezing room 5, the freezing room 6, and an ice making room (not shown), and is a rear part of the refrigerator main body 1 and below the refrigerating evaporator 33. Is provided.

A machine room 36 is provided on the lower back surface of the refrigerator body 1. Although not shown in detail, in this machine room 36, a compressor 37, a condenser 38 (see FIG. 3) constituting the above-described refrigeration cycle apparatus 35, a cooling fan for cooling the compressor 37 and the condenser 38 are provided. (Not shown), a defrosted water evaporating dish 39 and the like are provided.
Near the lower part of the back surface of the refrigerator main body 1, a control device 40 is provided as a control means in which a microcomputer for controlling the whole is mounted. The control device 40 will be described later. In addition, although not illustrated, the ground wire of the electric equipment provided in the refrigerator main body 1 is grounded via the outer box 2a or the like.

A freezing evaporator chamber 41 is provided on the back surface of the freezing chamber 6 of the refrigerator body 1. The refrigeration evaporator chamber 41 is provided with a refrigeration evaporator 34, a defrost heater 42 (see FIG. 4), a refrigeration blower fan 43, and the like. The defrost heater 42 is for removing frost adhering to the refrigeration evaporator 34. The refrigeration blower fan 43 generates air by the blowing action caused by the rotation of the fan and supplies cold air generated by the refrigeration evaporator 34 to the small freezer compartment 5, the freezer compartment 6, and an ice making chamber (not shown). The refrigeration evaporator 34 is provided above. The refrigeration blower fan 43 is periodically driven by an input signal from the control device 40, and is stopped when the freezer compartment door 28 is opened while being driven.
A cold air outlet 41a is provided in front of the freezing evaporator chamber 41, and a return port 41b is provided below the cold air outlet 41a.

  In this configuration, when the refrigerant is supplied to the driving of the refrigeration blower fan 43 and the refrigeration evaporator 34 to operate the refrigeration cycle by the refrigeration cycle device 35, wind is generated by the blowing action of the refrigeration blower fan 43. The cold air generated by the refrigeration evaporator 34 is supplied to the small freezer compartment 5, the freezer compartment 6 and an ice making chamber (not shown) from the cold air outlet 41a, and is returned to the refrigeration evaporator compartment 41 from the return port 41b. To do. Thereby, the small freezer compartment 5, the freezer compartment 6, and the ice making chamber not shown are cooled. A drainage basin 44 for receiving defrost water when the refrigeration evaporator 34 is defrosted is provided below the refrigeration evaporator 34. The defrost water received by the drainage basin 44 is guided to the defrost water evaporating dish 39 provided in the machine room 36 and evaporated at the defrost water evaporating dish 39.

  In the refrigerator main body 1, a refrigeration evaporator 33, a cold air duct 45, a refrigeration blower fan 46 and the like are provided behind the refrigeration room 3 and the vegetable room 4. That is, a refrigeration evaporator chamber 47 constituting a part of the cold air duct 45 is provided behind the chilled chamber 22 at the lowermost stage of the refrigeration chamber 3 in the refrigerator main body 1. The refrigeration evaporator 33 is provided in the refrigeration evaporator chamber 47. The cold air duct 45 forms a passage for supplying the cold air generated by the refrigerating evaporator 33 to the refrigerating room 3 and the vegetable room 4. The refrigeration blower fan 46 generates air by the blowing action caused by the rotation of the fan and supplies the cold air generated by the refrigeration evaporator 33 to the refrigeration chamber 3 and the vegetable compartment 4. It is provided below. The refrigeration blower fan 46 is periodically driven by an input signal from the control device 40, and is stopped when the refrigeration room door 8 is opened while being driven.

A cold air supply duct 48 extending upward is provided above the refrigeration evaporator chamber 47, and the upper end portion of the refrigeration evaporator chamber 47 communicates with the lower end portion of the cold air supply duct 48. In this case, a cold air duct 45 is constituted by the refrigeration evaporator chamber 47 and the cold air supply duct 48. A front wall 47 a that forms the front side wall of the refrigeration evaporator chamber 47 bulges forward from the cold air supply duct 48. In front of the cold air supply duct 48, a plurality of cold air supply ports 49 that open into the refrigerator compartment 3 are provided.
A drainage basin 50 is provided in the refrigeration evaporator chamber 47 and below the refrigeration evaporator 33. The drainage basin 50 receives the defrosted water from the refrigeration evaporator 33. The defrost water received by the drainage basin 50 is also guided to the defrosting water evaporating dish 39 provided in the machine room 36 in the same manner as the defrosting water received by the drainage basin 44, and the defrosting water evaporating dish is provided. It is evaporated at 39.

  An air duct 51 is provided behind the vegetable compartment 4. The air duct 51 is composed of an air duct forming member 52 extending vertically and an inner box 2b. The refrigeration blower fan 46 described above is provided in the blower duct 51. The air duct 51 has a suction port 52a. The suction port 52 a is formed in the blower duct forming member 52 so as to surround the refrigeration blower fan 46. The blower duct 51 communicates with the refrigeration evaporator chamber 47 (cold air duct 45) so that the upper end of the blower duct 51 circulates the drainage basin 50.

  An air supply duct 53 extending vertically is provided in front of the air duct 51. The air supply duct 53 includes an air supply duct forming member 54 that extends vertically and a blower duct forming member 52. The air supply duct 53 has an upper end connected to the rear bottom of the chilled chamber 22 and a lower end connected to the rear of the vegetable chamber 4. A suction port 52 a of the air duct 51 is located at the lower end of the rear portion of the air supply duct 53.

  In this configuration, when the refrigeration blower fan 46 is driven, wind is generated by the blowing action. That is, the air in the vegetable compartment 4 is sucked into the refrigeration blower fan 46 side from the suction port 52a and blown out to the blower duct 51 side. The air blown to the air duct 51 side passes through the refrigeration evaporator chamber 47 and the cold air supply duct 48 of the cold air duct 45, and is blown out from the plurality of cold air supply ports 49 into the refrigerator room 3. The air blown into the refrigerator compartment 3 is also supplied into the vegetable compartment 4 through a communication port (not shown), and finally sucked into the refrigerator fan 46 for refrigerator. The air in the refrigerator compartment 3 and the chilled chamber 22 is also sucked into the refrigerator fan 46 from the air supply duct 53.

  In this way, the wind is circulated by the air blowing action of the refrigeration blower fan 46. When the refrigerant is supplied to the refrigeration evaporator 33 and the cooling operation by the refrigeration cycle is performed during the wind circulation process, the air passing through the refrigeration evaporator chamber 47 is cooled by the refrigeration evaporator 33 and is cooled. Then, the cold air is supplied to the refrigerator compartment 3 and the vegetable compartment 4, whereby the refrigerator compartment 3 and the vegetable compartment 4 are cooled to a temperature in the refrigerator compartment.

The refrigeration cycle having the above configuration will be described with reference to FIG.
In the refrigeration cycle apparatus 35 shown in FIG. 3, a condenser 38 is connected to the discharge port 37 a of the compressor 37 via a muffler 61 and an evaporation pipe 62. A heat radiating pipe 63 and a dew proof pipe 64 are connected in series to the outlet of the condenser 38. In addition, although not shown in figure, the heat radiating pipe 63 is located in the both sides | surfaces and back surface of the heat insulation box 2, and the dew prevention pipe 64 is located in the surrounding part of each storage chamber 3-6, the opening part of the front surface of the ice making chamber which is not shown in figure. doing.

  The outlet of the dewproof pipe 64 is connected to the dryer 65. The outlet of the dryer 65 is connected to an inlet port 66a of a three-way valve 66 that functions as a switching valve. One outlet port 66 b of the three-way valve 66 is connected to the inlet of the refrigeration evaporator 33 via a refrigeration capillary tube 67. The other outlet port 66 c is connected to the inlet of the freezing evaporator 34 via the freezing capillary tube 68. That is, the three-way valve 66 is provided between the compressor 37 and the refrigeration evaporator 33 in the refrigeration cycle. An expansion valve may be used as the refrigeration capillary tube 67 and the freezing capillary tube 68.

The outlet of the refrigeration evaporator 33 is connected to the inlet port 69 a of the T-shaped tube 69. On the other hand, the outlet of the refrigeration evaporator 34 is connected to the other inlet port 69 b of the T-tube 69 via an accumulator 70 and a check valve 71.
An outlet port 69 c of the T-shaped tube 69 is connected to the suction pipe 72. The outlet of the suction pipe 72 is connected to the suction port 37 b of the compressor 37.
Next, the electrical configuration of the above configuration will be described with reference to FIG.

  In FIG. 4, the control device 40 is composed mainly of a microcomputer, for example. The control device 40 includes a ROM 40a, a RAM 40b, a non-volatile storage medium such as an EPPROM 40c, a timer 40d, and the like. Various control programs are stored in the ROM 40a. In the RAM 40b, data is written as necessary during the cooling operation. The EEPROM 40c stores a part of data used for the program of the ROM 40a, for example, data such as a temperature threshold value. With the configuration in which data is stored in the EEPROM 40c, the threshold value can be easily changed according to the capacity of the refrigerator and the size of the outside air contact portion (vertical partition member 13).

  The control device 40 includes an operation panel 31, an outside air temperature sensor 32, a refrigerating room temperature sensor 74 serving as a storage room temperature sensor, a freezing room temperature sensor 75 serving as a storage room temperature sensor, an evaporator temperature sensor 76, and a door opening / closing of the refrigerating room. Signals from the sensor 15, the freezer door open / close sensor 29, a defrost sensor (not shown), and the like are input. As shown in FIG. 1, the refrigerating room temperature sensor 74 is provided at the lower rear of the refrigerating room 3 and measures the temperature in the refrigerating room 3, and has the same configuration as the outside air temperature sensor 32. The freezer compartment temperature sensor 75 is provided behind the freezer compartment 6 and measures the temperature in the freezer compartment 6, and has the same configuration as the outside air temperature sensor 32. The evaporator temperature sensor 76 is provided on the upper surface of the refrigeration evaporator 33 and measures the temperature of the refrigeration evaporator 33, and has the same configuration as the outside air temperature sensor 32.

  Based on these input signals, the control device 40 executes the program stored in the ROM 40a using the data in the EEPROM 40c and the data written in the RAM 40b as necessary. The control device 40 controls, for example, the drive / stop / rotation speed of the compressor 37 shown in FIG. 4 and opens / closes the valve to switch the refrigerant supply destination to at least one of the refrigeration evaporator 33 and the refrigeration evaporator 34. Switching of the state of the three-way valve 66, driving / stopping of the refrigeration blower fan 43, driving / stopping of the refrigeration blower fan 46, driving / stopping of the defrosting heater 42, driving / stopping of the radiating fan (not shown), etc. are not shown. Control is performed via a drive circuit. And the control apparatus 40 is set so that the temperature of the refrigerator compartment 3 and the vegetable compartment 4 may fall in the temperature range of the refrigerator temperature zone, and the temperature of the small freezer compartment 5, the freezer compartment 6, and the ice making chamber (not shown) is in the refrigerator temperature zone. The above control is performed so as to be within the temperature range.

  The control device 40 controls the refrigeration cooling operation and the non-refrigeration cooling operation. In the refrigeration cooling operation, the refrigeration room 3 and the vegetable room 4 that are storage rooms in the refrigeration temperature zone are cooled. In the non-refrigeration cooling operation, the storage rooms other than the storage room in the refrigeration temperature zone, that is, the small freezing room 5 and the freezing room 6 that are storage rooms in the freezing temperature zone, and an ice making room (not shown) are cooled.

  In the refrigeration cooling operation, the control device 40 drives the compressor 37 as shown in FIG. 3, and the outlet of the three-way valve 66 so that the temperature of the refrigeration room 3 and the vegetable room 4 is within the temperature range of the refrigeration temperature zone. Open port 66b and close outlet port 66c. Thereby, the refrigerant discharged from the discharge port 37a of the compressor 37 is a muffler 61, an evaporation pipe 62, a condenser 38, a heat radiation pipe 63, a dew prevention pipe 64, a dryer 65, a three-way valve 66, a refrigeration capillary tube 67, The refrigerant is returned to the compressor 37 from the suction port 37 b through the refrigeration evaporator 33, the T-shaped tube 69, and the suction pipe 72. Thereby, the refrigeration cooling operation in which cold air is generated by the refrigeration evaporator 33 is performed.

  When the temperatures of the refrigerator compartment 3 and the vegetable compartment 4 reach the set temperature or lower, the control device 40 performs a non-refrigerated cooling operation. In the non-refrigerated cooling operation, the control device 40 drives the compressor 37 as shown in FIG. 3 so that the temperatures of the small freezer compartment 5, the freezer compartment 6 and the ice making chamber (not shown) are within the temperature range of the freezing temperature zone. In addition, the outlet port 66c of the three-way valve 66 is opened and the outlet port 66b is closed. Thereby, the refrigerant discharged from the discharge port 37a of the compressor 37 is the muffler 61, the evaporation pipe 62, the condenser 38, the heat radiation pipe 63, the dew prevention pipe 64, the dryer 65, the three-way valve 66, the freezing capillary tube 68, The refrigerant is returned from the suction port 37 b into the compressor 37 through the refrigeration evaporator 34, the accumulator 70, the check valve 71, the T-shaped tube 69, and the suction pipe 72. Thus, a non-refrigerated cooling operation in which cold air is generated by the refrigeration cooler 34, that is, a refrigeration cooling operation is performed.

  As described above, when the temperatures of the small freezer compartment 5, the freezer compartment 6 and the ice making chamber (not shown) reach the set temperature or lower, the control device 40 repeatedly executes the control of the refrigeration cooling operation and the non-refrigeration cooling operation. Note that when any of the storage chambers 3 to 6 and the ice making chamber reach the set temperature or lower, the operation of the compressor 37 may be stopped to stop the operation of the refrigeration cycle, or the rotation speed of the compressor 37 may be reduced. . In this embodiment, the operation in which the refrigerant is not supplied to the refrigeration evaporator 33 is referred to as a non-refrigeration cooling operation. The control device 40 opens both the outlet port 66b and the outlet port 66c of the three-way valve 66, supplies refrigerant to both the refrigeration evaporator 33 and the freezing evaporator 34, and stores the storage chambers 3-6 and You may perform control which cools the ice making chamber which is not illustrated simultaneously. In this case, since the refrigerant is supplied to the refrigeration evaporator 33, the refrigeration cooling operation is performed.

  Furthermore, as described above, the control device 40 controls the driving / stopping of the refrigeration blower fan 46 based on the signal from the refrigeration room door opening / closing sensor 15. Specifically, when the refrigerator compartment door 8 is closed, the control device 40 controls to periodically drive the refrigerator fan 46 based on the ON signal from the refrigerator compartment door opening / closing sensor 15. I do. Further, when the refrigerator compartment door 8 is opened while the refrigerator fan 46 is being driven, the control device 40 causes the refrigerator fan 46 to be based on an OFF signal from the refrigerator door open / close sensor 15. Control to stop.

  Further, the control device 40 controls driving / stopping of the refrigeration blower fan 43 based on a signal from the freezer compartment door opening / closing sensor 29. Specifically, when the freezer compartment door 28 is closed, the control device 40 periodically drives the freezing fan 43 based on the ON signal from the freezer compartment door opening / closing sensor 29. I do. Further, when the freezer compartment door 28 is opened while the freezing blower fan 43 is being driven, the control device 40 causes the freezer blower fan 43 based on the OFF signal from the freezer compartment door opening / closing sensor 29. Control to stop.

  Furthermore, as shown in FIG. 5, the control device 40 determines a current rate of the dew proof heater 16 based on the detection result of the outside air temperature sensor 32, that is, a first mode value or a second value described later. Set the mode value to control. The energization rate indicates the ratio of the actual output of the dew proof heater 16 when the output when the unit time is applied at a predetermined current value heated by the dew proof heater 16 is 100%. In this embodiment, the current values are the same, and the magnitude of the energization rate is changed by changing the ratio of the applied voltage time, that is, the duty ratio of the applied voltage time. For example, when the energization rate of the dew proof heater 16 is 90%, the control device 40 applies 90% of the time in the unit time at the predetermined current value heated by the dew proof heater 16, and the remaining 1 Control without applying the split time is repeated.

  The solid line waveform of the energization rate of the dew proof heater 16 in FIG. 5 indicates the value of the energization rate in the first mode, and when the refrigerant is supplied to the refrigeration evaporator 33, The minimum energization rate value of the dew-proof heater 16 that can prevent the formation of condensation is shown. The broken line waveform of the energization rate of the dew proof heater 16 in FIG. 5 indicates the value of the energization rate in the second mode, and when the refrigerant is not supplied to the refrigeration evaporator 33, The minimum energization rate value of the dew-proof heater 16 that can prevent the formation of condensation is shown.

  In this embodiment, when the energization rate is the value of the first mode, the control device 40 is a case where the temperature of the outside air is less than 15 ° C. based on the signal from the outside air temperature sensor 32 and the refrigeration evaporator 33 is used. When the refrigerant is supplied, the energization rate of the dew proof heater 16 is set to 20%. When the temperature of the outside air is 15 ° C. or more and 35 ° C. or less based on a signal from the outside air temperature sensor 32 and the refrigerant is supplied to the refrigeration evaporator 33, the control device 40 As the temperature increases, the energization rate of the dew proof heater 16 is also set to a large value. Further, when the temperature of the outside air exceeds 35 ° C. based on a signal from the outside air temperature sensor 32 and the refrigerant is supplied to the refrigeration evaporator 33, the control device 40 energizes the dew proof heater 16. Set the rate to 90%. When the temperature of the outside air is less than 15 ° C., the temperature difference between the temperature of the outside air and the refrigerator compartment 3 is small, so that condensation is not easily generated in the vertical partition member 13. Therefore, the energization rate of the dew proof heater 16 may be a constant small value. When the temperature of the outside air exceeds 35 ° C., the difference between the temperature of the outside air and the temperature of the refrigerating chamber 3 becomes large, so that condensation is likely to be generated in the vertical partition member 13. Therefore, by increasing the value of the energization rate of the dew-proof heater 16, no condensation is generated on the vertical partition member 13.

  Further, the control device 40 supplies the refrigerant to the refrigeration evaporator 33 in the case where the temperature of the outside air is less than 15 ° C. based on the signal from the outside air temperature sensor 32 when the energization rate is the value of the second mode. If not, the energization rate of the dew proof heater 16 is set to 10%. Further, when the temperature of the outside air is 15 ° C. or more and 35 ° C. or less based on the signal from the outside air temperature sensor 32 and the refrigerant is not supplied to the refrigeration evaporator 33, the control device 40 As the temperature increases, the energization rate of the dew proof heater 16 is also set to a large value. Further, when the temperature of the outside air exceeds 35 ° C. based on the signal from the outside air temperature sensor 32 and the refrigerant is not supplied to the refrigeration evaporator 33, the control device 40 energizes the dew proof heater 16. Set the rate to 80%. Even when the energization rate is the value of the second mode, if the temperature of the outside air is less than 15 ° C., the difference between the temperature of the outside air and the temperature of the refrigerating chamber 3 is small. . Therefore, the energization rate of the dew proof heater 16 may be a constant small value. When the temperature of the outside air exceeds 35 ° C., the temperature difference between the temperature of the outside air and the refrigerator compartment 3 is large, so that condensation is likely to be generated on the front surface of the vertical partition member 13. Therefore, by increasing the value of the energization rate of the dew-proof heater 16, no condensation is generated on the vertical partition member 13.

  Here, the control device 40 sets the value of the power supply rate in the second mode to be lower than the value of the power supply rate of the dew-proof heater 16 than in the first mode at a given temperature of the outside air, for example, FIG. In this case, the temperature is set to be 10% lower in all temperature ranges of the outside air. When the temperature of the outside air is the same, the temperature when the refrigerant is not supplied to the refrigeration evaporator 33 and the temperature of the refrigeration chamber when the refrigerant is supplied to the refrigeration evaporator 33 are greater. This is because the difference between the temperature 3 and the temperature of the vertical partition member 13 is not easily generated. Thereby, the power consumption of the dew-proof heater 16 is reduced by 10% when the refrigerant is not supplied to the refrigeration evaporator 33 than when the refrigerant is supplied to the refrigeration evaporator 33.

Next, the control of the dew proof heater 16 by the control device 40 will be described with reference to FIG.
When a “power” switch (not shown) on the operation panel 31 is pressed, the control device 40 performs a cooling operation for each storage room. First, as shown in FIG. 6, the control device 40 detects each temperature with the outside air temperature sensor 32, the refrigerator temperature sensor 74, the freezer temperature sensor 75, the evaporator temperature sensor 76, and the like (step S1). When the detected temperature of the refrigerating room temperature sensor 74 is a predetermined temperature, specifically, the temperature of the refrigerating room 3 is not, for example, 3 ° C. or less (step S2: No), the control device 40 starts the timer 40d (step S2). S3), cooling in the storage room in the refrigeration temperature zone, that is, the refrigeration cooling operation is started (step S4).

  In the refrigeration cooling operation, the control device 40 drives the compressor 37 and opens the outlet port 66b of the three-way valve 66 to supply the refrigerant to the refrigeration evaporator 33. Moreover, the control apparatus 40 drives the refrigeration blower fan 46 regularly. Thus, the cold air generated by the refrigeration evaporator 33 passes through the cold air supply duct 48 by the wind generated by the air blowing action of the refrigeration blower fan 46, and passes from the plurality of cold air supply ports 49 to the refrigeration chamber 3 and the chilled chamber 22. Supplied. Furthermore, the cold air supplied to the refrigerator compartment 3 and the chilled room 22 contributes to the cooling of stored items such as food, and then merges and is supplied to the vegetable compartment 4 from a communication port (not shown). The cold air supplied to the vegetable compartment 4 contributes to the cooling of stored items such as vegetables, and is then sucked into the refrigeration fan 46 side from the suction port 52a and is again cooled by the refrigeration evaporator 33. .

  Next, based on the temperature of the outside air and the solid line waveform shown in FIG. 5, the control device 40 sets the energization rate of the dew proof heater 16 to a value corresponding to the temperature of the outside air in the first mode (step S5). ). Since the energization rate of the dew-proof heater 16 is the value of the first mode, when the refrigerator compartment door 8 is opened, the difference between the temperature of the surface of the vertical partition member 13 and the temperature of the outside air of the refrigerator compartment 3 is small. Condensation is not generated on the partition member 13.

  Next, as in step S1, the control device 40 detects each temperature using the outside air temperature sensor 32, the refrigerator temperature sensor 74, the freezer temperature sensor 75, the evaporator temperature sensor 76, and the like (step S6). And the control apparatus 40 resets the timer 40d (step S8), complete | finishes a refrigeration cooling operation (step S9), and complete | finishes a refrigeration cooling operation (step S7: Yes), and performs control of a non-refrigeration cooling operation. Is determined (step S10). The condition for ending the refrigeration cooling operation is, for example, when the temperature of the refrigeration chamber 3 is a predetermined temperature or lower, for example, 1 ° C. or lower, or when the timer 40d has passed a predetermined time or longer. When the temperature of the refrigerator compartment 3 is higher than a predetermined temperature, for example, higher than 1 ° C. and the timer 40d has not elapsed for a predetermined time, the controller 40 repeatedly performs the refrigerator cooling operation (step S7: No).

  When the temperature of the refrigerator compartment 3 is 3 degrees C or less in determination of step S2 (step S2: Yes), or when above-mentioned step S9 is complete | finished, the control apparatus 40 performs the control shown below. When the temperature of the refrigeration evaporator 33 detected by the evaporator temperature sensor 76 is higher than a predetermined temperature, for example, −18 ° C. (step S10: No), the control device 40 starts the timer 40d (step S11). Then, the non-refrigerated cooling operation is started (step S12).

  In the non-refrigeration cooling operation, the control device 40 continues to drive the compressor 37, closes the outlet port 66b of the three-way valve 66 to prevent the refrigerant from being supplied to the refrigeration evaporator 33, and the outlet port of the three-way valve 66. 66 c is opened and the refrigerant is supplied to the refrigeration evaporator 34. Further, the control device 40 periodically drives the refrigeration blower fan 43. Thus, the cold air generated by the freezing evaporator 34 is supplied to the small freezer compartment 5, the freezer compartment 6, and an ice making chamber (not shown) by the wind generated by the air blowing action of the freezing fan 43. Furthermore, the cold air supplied to the small freezer 5, the freezer 6 and the ice making chamber (not shown) joins and cools the stored items such as foods, and is then sucked into the freezing fan 43 and frozen again. The circulation of cooling by the evaporator 34 is repeated.

  Next, when the timer 40d has elapsed for a predetermined time, that is, when the non-refrigerated cooling operation is performed for a predetermined time (step S13: Yes), the control device 40, based on the temperature of the outside air and the waveform of the broken line shown in FIG. The energization rate of the dew proof heater 16 is switched to the value of the second mode (step S14). At this time, since the refrigerant is not supplied to the refrigeration evaporator 33, the difference between the temperature of the refrigeration chamber 3 and the temperature of the outside air is smaller in the non-refrigeration cooling operation than in the refrigeration cooling operation. Here, since the energization rate of the dew-proof heater 16 is the value of the second mode, the power consumption can be reduced more than the value of the first mode, and no dew condensation is generated on the vertical partition member 13. Even when the timer 40d does not elapse in step S13 (step S13: No), when the refrigeration blower fan 46 is switched from the drive state to the stop state during the non-refrigeration cooling operation (step S19: Yes). The control device 40 switches the energization rate of the dew proof heater 16 to the value of the second mode based on the temperature of the outside air and the broken line waveform shown in FIG. 5 (step S14). As a result, when the refrigeration evaporator 33 is sufficiently cooled, the refrigeration blower fan 46 is not driven, so that the refrigeration chamber 3 is not cooled too much. Therefore, the difference between the temperature of the refrigerator compartment 3 and the temperature of the outside air is small, and no dew condensation is generated on the vertical partition member 13 even when the energization rate of the dew proof heater 16 is the value of the second mode. In step S13, when the timer 40d has not elapsed (step S13: No), and when the refrigeration blower fan 46 is driven during the non-refrigeration cooling operation, the refrigeration evaporator 33 is used. Is still sufficiently cooled, so that the controller 40 sets the energization rate of the dew proof heater 16 in the first mode so that condensation does not occur in the vertical partition member 13 even if this cold air is supplied to the refrigerator compartment 3. While maintaining the value, the non-refrigerated cooling operation is continuously repeated (step S19: No).

  Next, similarly to step S1, the control device 40 detects each temperature by the outside air temperature sensor 32, the refrigerator temperature sensor 74, the freezer temperature sensor 75, the evaporator temperature sensor 76, and the like (step S15). And the control apparatus 40 resets the timer 40d (step S17), complete | finishes a non-refrigeration cooling operation (step S18), when complete | finishing a non-refrigeration cooling operation (step S16: Yes), and transfers to step S1. The condition for terminating the non-refrigerated cooling operation is, for example, when the temperature of the freezer compartment 6 is equal to or lower than a predetermined temperature, for example, −20 ° C. or lower, or when the timer 40d elapses for a predetermined time. The control device 40 repeatedly performs the non-refrigeration cooling operation when the temperature of the freezer compartment 6 is equal to or higher than a predetermined temperature, for example, higher than −20 ° C. and the timer 40d has not elapsed for a predetermined time (step S16: No).

  Note that, during operation and completion of the refrigeration cooling operation and the non-refrigeration cooling operation, data is written and data for the next operation is read as necessary. Although not shown, the control device 40 drives the defrost heater 42 based on a defrost sensor (not shown) as necessary to remove frost attached to the refrigeration evaporator 34.

  Next, each temperature (the temperature of the refrigerator compartment 3, the temperature of the freezer compartment 6, the temperature of the refrigeration evaporator 33), the refrigeration cooling operation and the non-refrigeration cooling operation, the driving / stopping of the refrigeration blower fan 43, and the prevention The relationship with the mode of energization rate of the dew heater 16 will be described with reference to FIG.

FIG. 7A schematically shows the relationship between time and each of the above temperatures, and the waveform of line A shows the change in temperature of the refrigerating room 3, that is, the temperature detected by the refrigerating room temperature sensor 74, and line B. The waveform of C shows the change in the temperature of the freezer compartment 6, that is, the detected temperature of the freezer temperature sensor 75, and the waveform of the C line shows the temperature of the refrigeration evaporator 33, that is, the change in the detected temperature of the evaporator temperature sensor 76.
FIG. 7B shows which of the refrigeration cooling operation and the non-refrigeration cooling operation is being performed. As shown in FIG. 7B, the control device 40 performs the refrigeration cooling operation when the temperature of the refrigerator compartment 3 exceeds a predetermined temperature and when the non-refrigeration cooling operation satisfies a predetermined condition. The control device 40 performs the non-refrigeration cooling operation when the refrigeration cooling operation satisfies the predetermined condition and the temperature of the freezer compartment 6 exceeds the predetermined temperature.

FIG. 7C shows a state in which the refrigeration blower fan 46 is turned on (driven) and turned off (stopped). As described above, the control device 40 periodically drives and stops the refrigeration fan 46 to circulate the air in the storage room in the refrigeration temperature zone. Moreover, the control apparatus 40 is performing control which stops the ventilation fan 46 for refrigeration when the door 8 for refrigeration rooms opens. Thereby, even if the door 8 for refrigeration rooms opens, the cold air in the storage room of a refrigeration temperature zone will remain in the said storage room (refrigeration room 3) as much as possible.
FIG. 7 (d) shows a mode of energization rate of the dew proof heater 16. As described above, the control device 40 sets the energization rate of the dew-proof heater 16 to the value of the first mode at the start of the refrigeration cooling operation. As shown in step S13 and step S19 of FIG. 6, the end point of the setting in the first mode is when the refrigeration fan 46 is turned on when a predetermined time has elapsed from the start of the non-refrigeration cooling operation or during the non-refrigeration cooling operation. Until the time when the driving state is switched to the stopping state. Here, in FIG. 7D, the time from the start of the non-refrigeration cooling operation to the elapse of the predetermined time is indicated as “t”. The end of the setting in the second mode is until the refrigeration cooling operation is started.

According to the first embodiment described above, the following effects can be obtained.
The control device 40 sets the energization rate of the dew proof heater 16 to a predetermined value based on the detection result of the outside air temperature sensor 32, and sets the energization rate of the dew proof heater 16 to the vertical partition member 13 during the refrigeration cooling operation. The value of the first mode in which condensation is not generated is set, and during the non-refrigerated cooling operation, the energization rate of the dew proof heater 16 is such that no condensation is generated in the vertical partition member 13 and is the same outside air temperature detection result. The value of the second mode is set smaller than the value of the first mode. Since the energization rate of the second mode is smaller than the energization rate of the first mode when the outside air temperature is the same, it is possible to prevent condensation from forming on the vertical partition member 13 and always in the first mode. Power consumption can be reduced as compared with driving the dew-proof heater 16.

  The control device 40 performs control to switch the energization rate of the dew proof heater 16 from the value of the first mode to the value of the second mode after switching from the refrigeration cooling operation state to the non-refrigeration cooling operation state. That is, during the refrigeration cooling operation in which condensation is likely to be generated in the vertical partition member 13, the energization rate of the dew proof heater 16 is set to the value of the first mode. Thereby, it can prevent reliably that dew condensation produces | generates in the vertical partition member 13. FIG.

  The control device 40 switches the refrigeration heater 16 after switching from the refrigeration cooling operation state to the non-refrigeration cooling operation state (during the non-refrigeration cooling operation) and when the refrigeration blower fan 46 switches from the driving state to the stop state. Control is performed to switch the energization rate from the value of the first mode to the value of the second mode. That is, during the refrigeration cooling operation in which condensation is likely to be generated in the vertical partition member 13, the energization rate of the dew proof heater 16 is set to the value of the first mode. Thus, immediately after switching from the refrigeration cooling operation to the non-refrigeration cooling operation, when the refrigeration evaporator 33 is still cold, cold air is supplied to the vertical partition member 13 by the blast operation of the refrigeration blower fan 46, and the vertical partition It is possible to reliably prevent condensation from forming on the member 13.

  In the refrigerator including the refrigerator door 8 that is a double door, and the vertical partition member 13 that closes between the refrigerator door left door 9 and the refrigerator door right door 10. It is possible to prevent condensation from being generated on the vertical partition member 13 by the control, and it is possible to reduce power consumption.

(Second Embodiment)
A second embodiment will be described with reference to FIG.
In the second embodiment, the control of the dew proof heater 16 is different from the first embodiment. That is, as shown in FIG. 8, the control device 40 of the second embodiment performs step S20 instead of step S13 (see FIG. 6) in the flowchart of the control of the dew proof heater 16 of the first embodiment.
Next, control in which the control device 40 performs step S20 will be described. In addition, since steps other than step S20 of 2nd Embodiment are the same as that of 1st Embodiment, description is abbreviate | omitted about the same step.

  The control device 40 starts the non-refrigeration cooling operation similarly to the first embodiment (step S12), and then the temperature of the refrigeration evaporator 33 is equal to or higher than a predetermined temperature, for example, −20 ° C. (step S20: Yes). ), Switching the energization rate of the dew proof heater 16 to the value of the second mode (step S14). Further, even when the temperature of the refrigeration evaporator 33 is equal to or higher than a predetermined temperature, for example, lower than −20 ° C. in Step S20 (Step S20: No), the refrigeration blower fan 46 is stopped from the drive state during the non-refrigeration cooling operation. When switching to (step S19: Yes), the control device 40 switches the energization rate of the dew proof heater 16 to the value of the second mode (step S14). In step S20, the temperature of the refrigeration evaporator 33 is a predetermined temperature or higher, for example, lower than −20 ° C. (step S20: No), and the refrigeration blower fan 46 is driven during the non-refrigeration cooling operation. If it is, the control device 40 repeatedly performs the non-refrigeration cooling operation with the value of the energization rate in the first mode (step S19: No).

Next, effects of the second embodiment will be described.
When the detection result of the refrigeration evaporator 33 of the evaporator temperature sensor 76 is equal to or higher than a predetermined temperature, the control device 40 changes the energization rate of the dew proof heater 16 from the value of the first mode to the value of the second mode. Control to switch to. The cold air generated by the refrigeration evaporator 33 is supplied to the refrigeration room 3 and the vegetable room 4 by the blowing action of the refrigeration blower fan 46. Therefore, when the refrigeration cooling operation is switched from the refrigeration cooling operation to the non-refrigeration cooling operation based on the temperature of the refrigeration chamber 3, if the refrigeration evaporator 33 is sufficiently cooled even during the non-refrigeration cooling operation, Condensation may be generated in the vertical partition member 13 when supplied to the refrigerator compartment 3 and the vegetable compartment 4 and the output of the dew proof heater 16 is small. In this embodiment, even if the non-refrigeration cooling operation is started, when the temperature of the refrigeration evaporator 33 does not become a predetermined temperature or higher, the energization rate of the dew prevention heater 16 is set to the value of the first mode. Thereby, it can prevent reliably that dew condensation produces | generates in the vertical partition member 13. FIG.

  The control device 40 is switched from the refrigeration cooling operation state to the non-refrigeration cooling operation state (during the non-refrigeration cooling operation), and the detection result of the refrigeration evaporator 33 of the evaporator temperature sensor 76 becomes a predetermined temperature or higher. When the refrigeration blower fan 46 is switched from the driving state to the stopped state, whichever is earlier, the control for switching the energization rate of the dew proof heater 16 from the value of the first mode to the value of the second mode is performed. Is going. Thereby, the start of the setting of the electricity supply rate by a 2nd mode is advanced, and the reduction time of power consumption can be lengthened.

In addition, the second embodiment has the same effects as the first embodiment.
As described above, the control means of the refrigerator of the present embodiment sets the energization rate of the heating means to a predetermined value based on the detection result of the outside air temperature sensor, and sets the energization rate of the heating means to the outside air during the refrigeration cooling operation. Set to the value of the first mode in which condensation does not occur in the contact part, and the non-refrigerated cooling operation is such that the energization rate of the heating means is such that condensation does not occur in the outside air contact part and the detection result of the temperature of the same outside air The value of the second mode is set smaller than the value of the first mode. As a result, the energization rate of the dew-proof heater becomes the value of the second mode having a smaller energization rate than the value of the first mode during the non-refrigerated cooling operation in which condensation does not easily occur. Therefore, it is possible to prevent condensation from being generated in the storage room, and to reduce power consumption used for preventing condensation as much as possible.

The refrigerator described above is not limited to the above-described embodiment, and can be applied by appropriately changing to various embodiments without departing from the gist thereof.
Although the door opening / closing sensor has been described as detecting the opening / closing of the doors of the refrigerator compartment and the freezer compartment, the door opening / closing sensor may detect the opening / closing of each door of the vegetable compartment, the small freezer compartment, and the ice making compartment. Alternatively, the refrigeration blower fan may be stopped when the vegetable compartment door is opened, and the refrigeration blower fan may be stopped when the small freezer compartment or ice making compartment door is opened.

  As an outside air contact portion of the present embodiment, a vertical partition member has been described as an example. However, in the storage room, when the storage room door is open, it is in a position where it can come into contact with the outside air and is a refrigeration evaporator. In a storage room at a position where cold air generated by the air can affect (for example, a position where the cold air contacts the back side of the outside air contact portion) or a position near the storage room where condensation may occur If there is, it may be other than the vertical partition member. For example, a portion of the side wall constituting the storage room where condensation is likely to occur may be used as the outside air contact portion, or the front end portion of the vertical partition member (where it contacts the door) or the upper wall of the box (shown as 2d in FIG. 1). The front end or the like may be used as an outside air contact portion, and a dew-proof heater may be provided at these outside air contact portions to perform the same control as in this embodiment.

  In the drawings, 1 is a refrigerator main body, 3 is a refrigerator compartment (storage compartment), 6 is a freezer compartment (storage compartment), 8 is a refrigerator compartment door (storage compartment door), 13 is a vertical partition member (outside air contact portion), 16 is a dew-proof heater, 32 is an outside air temperature sensor, 33 is a refrigeration evaporator, 35 is a refrigeration cycle device, 37 is a compressor, 38 is a condenser, 40 is a control device (control means), 46 is a refrigeration blower fan (Refrigeration blower), 66 is a three-way valve (switching valve), 74 is a refrigerator temperature sensor (storage chamber temperature sensor), 75 is a freezer temperature sensor (storage chamber temperature sensor), and 76 is an evaporator temperature sensor. .

Claims (4)

A refrigerator body having a storage room with an open front;
A storage room door for opening and closing the front surface of the storage room;
A storage room temperature sensor for detecting the temperature of the storage room;
An outside air temperature sensor for detecting the temperature of the outside air of the refrigerator body;
A refrigeration cycle apparatus comprising a compressor, a condenser, and a refrigeration evaporator for generating cold air for cooling the storage chamber, and constituting a refrigeration cycle;
Refrigeration cooling provided between the compressor of the refrigeration cycle apparatus and the refrigeration evaporator and supplying refrigerant supplied from the compressor via the condenser to the refrigeration evaporator by opening and closing a valve A switching valve for switching to one of a state of operation and a state of non-refrigeration cooling operation in which the refrigerant supplied from the compressor through the condenser is not supplied to the refrigeration evaporator;
An outside air contact portion provided at a position in contact with outside air and at or near the storage chamber;
Heating means for heating the outside air contact portion;
Refrigerant supplied to the refrigeration evaporator by controlling the driving of the compressor and switching the state of the switching valve so that the detection result of the storage chamber of the storage chamber temperature sensor falls within a predetermined temperature range. Control means for adjusting the flow of
A refrigeration blower fan configured to generate wind for supplying cold air generated by the refrigeration evaporator controlled by the control means to the storage compartment, and for the storage compartment during driving of the refrigeration blower fan A refrigeration fan configured to stop driving when the door is opened ,
The control means sets the energization rate of the heating means to a predetermined value based on the detection result of the outside air temperature sensor, and the energization rate of the heating means is condensed on the outside air contact portion during the refrigeration cooling operation. In the non-refrigerated cooling operation, the energization rate of the heating means is set to a value that does not generate condensation in the outside air contact portion and the same outside air temperature detection result is set. The value of the second mode, which is smaller than the value of the first mode, is set , and after the refrigeration cooling operation state is switched to the non-refrigeration cooling operation state, the refrigeration fan is stopped from the driving state. The refrigerator which switches the electricity supply rate of the said heating means from the value of the said 1st mode to the value of the said 2nd mode when switching to a state . An evaporator temperature sensor for detecting a temperature of the refrigeration evaporator;
When the detection result of the evaporator temperature sensor is equal to or higher than a predetermined temperature during the non-refrigerated cooling operation, the control means changes the power supply rate of the heating means from the value of the first mode. The refrigerator according to claim 1, which is set to a value of the second mode . An evaporator temperature sensor for detecting the temperature of the refrigeration evaporator;
In the non-refrigeration cooling operation, the control means is configured to detect when the detection result of the evaporator temperature sensor is equal to or higher than a predetermined temperature or when the refrigeration blower fan is switched from a drive state to a stop state. 3. The refrigerator according to claim 1, wherein the power supply rate of the heating unit is set from the value of the first mode to the value of the second mode when it is earlier . The storage room door is a double door that is pivotally supported on both right and left sides of the front opening of the storage room to open and close the front opening.
The outside air contact portion is attached to the side opposite to the pivotal support side of one of the double doors, and is rotated according to the opening and closing operation of the double doors, thereby opening the double doors. The refrigerator according to any one of claims 1 to 3, wherein the refrigerator is a vertical partition member that closes the wall.

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