JP2018096662A - Refrigerator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress temperature fluctuation with a storage chamber kept evenly at a set temperature band, in a refrigerator capable of setting a temperature of the storage chamber to a plurality of temperature bands.SOLUTION: A refrigerator includes: a refrigeration cycle 41 having a compressor 39, a cooler 34 and a high-temperature side refrigerant flow passage configured to flow to the cooler 34 refrigerant pumped from the compressor 39; and a heat insulation box 2 having a storage chamber 16 to which cold air cooled by the cooler 34 is supplied. The high-temperature side refrigerant flow passage includes: a first heating pipe 58 provided along an inner wall of the storage chamber 16 and configured to heat the inside of the storage chamber 16; a first bypass pipe 43A configured to bypass the first heating pipe 58, and a selector valve 59 configured to switch between the first heating pipe 58 and the first bypass pipe 43A to flow refrigerant.SELECTED DRAWING: Figure 3

Description

  Embodiments of the present invention relate to refrigerators.

  Conventionally, a refrigerator including a temperature switching chamber in which a storage temperature can be set in a plurality of temperature zones is known (for example, see Patent Document 1 below). In this refrigerator, if the temperature of the temperature switching chamber is higher than the set temperature zone, the cold air generated by the cooler of the refrigeration cycle is supplied to the temperature switching chamber, and if it is lower than the set temperature zone, the cold air is supplied by the damper device. By stopping the operation and energizing the heater device, the temperature switching chamber is controlled to be switchable over a wide temperature range. However, in the refrigerator having the above-described configuration, there is a problem that the heater energization amount tends to be large and the power consumption is increased.

Japanese Patent Laid-Open No. 10-288440

  Then, it aims at providing the refrigerator which can set the temperature of a store room in a some temperature zone, suppressing power consumption.

  The refrigerator of the present embodiment is supplied with a refrigeration cycle having a compressor, a cooler, and a high-temperature side refrigerant flow path for flowing a refrigerant pumped from the compressor to the cooler, and cold air cooled by the cooler. The high-temperature side refrigerant flow path is provided along an inner wall of the storage chamber, the first heating pipe for heating the storage chamber, and the first heating pipe. And a switching valve for switching to the first heating pipe and the first bypass pipe to flow the refrigerant.

It is sectional drawing of the refrigerator which concerns on 1st Embodiment of this invention. It is AA sectional drawing of FIG. It is a figure which shows the refrigerating cycle of the refrigerator of FIG. It is BB sectional drawing of FIG. It is a block diagram which shows the electric constitution of the refrigerator shown in FIG. It is a figure which shows the refrigerating cycle of the refrigerator which concerns on 2nd Embodiment.

(First embodiment)
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  The refrigerator 1 which concerns on this embodiment is provided with the heat insulation box 2 opened to the front, as shown in FIG. The heat insulation box 2 is configured by having a heat insulating material such as a vacuum heat insulating material or a foam heat insulating material in a heat insulating space 5 formed between an outer box 3 made of steel plate and an inner box 4 made of synthetic resin. . The heat insulating box 2 is provided with a plurality of storage spaces inside the inner box 4, and the storage spaces are partitioned vertically by a heat insulating partition wall 6.

  The space above the heat insulating partition wall 6 is a storage room that is cooled to a refrigeration temperature zone (for example, 1 to 4 ° C.), and the interior is further partitioned vertically by the partition wall 7. A refrigerating room 10 provided with a plurality of stages of mounting shelves is provided above the partition wall 7, and a vegetable room 12 is provided below the partition wall 7. A refrigeration temperature sensor 25 that measures the temperature in the refrigeration chamber 10 is provided on the back surface of the refrigeration chamber 10.

  The front opening of the refrigerator compartment 10 is provided with a rotating refrigerator compartment door 11 provided with a heat insulating material. An operation panel 8 for operating the refrigerator 1 is disposed on the front surface of the refrigerator compartment door 11. The operation panel 8 switches and sets the cooling intensity of each storage space by operating an operation switch (not shown), or sets a temperature zone of the temperature switching chamber 16 described later.

  The front opening of the vegetable compartment 12 is closed by a drawer-type vegetable compartment door 13 provided with a heat insulating material. A pair of left and right support frames for holding the storage container 14 is fixed to the inside of the vegetable compartment door 13 so that the storage container 14 is pulled out of the storage as the door is opened.

  In the space below the heat insulating partition wall 6, as shown in FIG. 2, an ice making chamber 15 equipped with an automatic ice making machine and a temperature switching chamber 16 are provided side by side via a heat insulating partition wall 22, and heat insulation is provided below the heat insulating partition wall 6. A freezer compartment 17 is provided via a partition wall 23.

  Both the ice making room 15 and the freezing room 17 are cooled to a freezing temperature zone (for example, −17 ° C. or lower). A freezing temperature sensor 26 for measuring the temperature in the freezer compartment 17 is provided on the back surface of the freezer compartment 17.

  The temperature switching chamber 16 is partitioned by a heat insulating partition walls 6, 22, and 23 into a vegetable compartment 12 that is cooled to a refrigeration temperature zone, an ice making chamber 15 and a freezer compartment 17 that are cooled to a freezing temperature zone. A switching chamber temperature sensor 27 for measuring the temperature in the temperature switching chamber 16 is provided on the back surface of the temperature switching chamber 16.

  The openings of the ice making room 15, the temperature switching room 16, and the freezing room 17 are closed by drawer-type doors 18 and 19 equipped with a heat insulating material, like the vegetable room 12, and fixed to the back side of each door 18 and 19. The storage containers 20, 21, and 29 are held by the pair of left and right support frames, and the storage containers 20, 21, and 29 are configured to be pulled out of the cabinet as the door is opened.

  At the rear of the refrigerator compartment 10 and the vegetable compartment 12, a refrigerator refrigerator 32 that is divided forward and backward by an evaporative cover 50 and a duct 33 that connects the refrigerator compartment 10 and the refrigerator refrigerator chamber 32 are formed. The refrigeration cooler chamber 32 stores a refrigeration cooler 30 and a refrigeration fan 31, and the air in the refrigeration cooler chamber 32 cooled by the refrigeration cooler 30 is sent to the refrigeration chamber 10 through the duct 33 by the refrigeration fan 31. Supplied.

  Further, at the rear of the ice making chamber 15, the temperature switching chamber 16, and the freezing chamber 17, there are a refrigeration cooler chamber 36 partitioned by an evaporative cover 51 provided with a heat insulating material, and an ice making chamber 15, the temperature switching chamber 16, and A duct 37 that connects the freezing chamber 17 and the freezing cooler chamber 36 is formed.

  The refrigeration cooler chamber 36 houses a refrigeration cooler 34 and a refrigeration fan 35, and the air in the refrigeration cooler chamber 36 cooled by the refrigeration cooler 34 is cooled by the refrigeration fan 35 through the duct 37, The temperature is supplied to the temperature switching chamber 16 and the freezing chamber 17.

  The refrigeration cooler 30 and the refrigeration cooler 34 constitute a refrigeration cycle 41 together with a compressor 39 and a condenser 42 housed in a machine room 38 provided at the lower back of the heat insulating box 2.

  As shown in FIG. 3, the refrigeration cycle 41 includes, in order from the discharge side of the compressor 39 that discharges a high-temperature and high-pressure gaseous refrigerant, an evaporation pipe 40, a condenser 42, a heat radiation pipe 43, a dew-proof pipe 44, a dryer. 45 and the inlet side of the three-way valve 46 are connected.

  The heat radiating pipe 43 and the dew proof pipe 44 are refrigerant pipes provided between the outlet side of the condenser 42 and the inlet side of the three-way valve 46, and the refrigerant is decompressed by the refrigerated capillary tube 47 and the frozen capillary tube 54. It constitutes a part of the high temperature side refrigerant flow path through which the previous liquid refrigerant flows. The heat radiating pipe 43 and the dew proof pipe 44 are embedded in the heat insulating space 5 of the heat insulating box 2 so as to come into contact with the outer box 3 after entering the heat insulating space 5 from the machine room 38 through the outer box 3. ing.

  In this example, the heat radiating pipe 43 includes a left heat radiating pipe 43 </ b> A provided on the left side wall of the heat insulating box 2 and a ceiling provided on the ceiling wall of the heat insulating box 2 in order from the upstream side (compressor side) in the refrigerant flow direction. A heat radiation pipe 43B, a back plate heat radiation pipe 43C provided on the back wall of the heat insulation box 2, and a right heat radiation pipe 43D provided on the right wall of the heat insulation box 2 are connected in series. The ends of the left heat radiating pipe 43A, the ceiling heat radiating pipe 43B, the back plate heat radiating pipe 43C, and the right heat radiating pipe 43D constituting the heat radiating pipe 43 are drawn from the heat insulating box 2 to the machine room 38 and connected to each other in the machine room 38. Has been.

  A first heating pipe 58 and a first switching valve 59 are provided between the condenser 42 and the ceiling heat radiating pipe 43B in addition to the left heat radiating pipe 43A.

  The first heating pipe 58 is composed of a refrigerant pipe provided in parallel with the left heat radiating pipe 43A, and extends along the upper surface side of the heat insulating partition wall 23 constituting the lower surface of the temperature switching chamber 16, as shown in FIGS. Are provided.

  The first switching valve 59 is a three-way valve provided in the machine room 38. As for the 1st switching valve 59, the inlet side is connected to the condenser 42, and the left heat radiating pipe 43A and the heating pipe 58 are connected to the outlet side.

  The first switching valve 59 is a three-way valve provided in the machine room 38, and has an inlet side connected to the condenser 42 and a left heat radiating pipe 43A and a first heating pipe 58 connected to the outlet side. The first switching valve 59 switches the refrigerant immediately after flowing through the condenser 42 between the first heating pipe 58 and the left heat radiating pipe 43A. As a result, the high-temperature refrigerant flows through the first heating pipe 58 to heat the inside of the temperature switching chamber 16, or bypasses the first heating pipe 58 and flows into the left heat radiating pipe 43A, thereby causing the left side wall of the heat insulating box 2 to move. Or heating.

  That is, in this embodiment, the left heat radiating pipe 43 </ b> A functions as a bypass pipe that bypasses the first heating pipe 58.

  The dew proof pipe 44 is a refrigerant pipe connected to the downstream side of the right heat radiating pipe 43D in the refrigerant flow direction, and is provided at the front opening of each of the storage chambers 10, 12, 15, 16, 17 provided in the heat insulation box 2. It is arrange | positioned at a peripheral part and the dew condensation around a door is suppressed with the condensation heat. In this example, the dew-proof pipe 44 is sequentially arranged around the front opening of the ice making room 15, the temperature switching room 16, the vegetable room 12, and the refrigerating room 10 from the freezer compartment 17 located at the bottom of the heat insulation box 2. Established. The downstream side of the dew-proof pipe 44 disposed in the front opening of the refrigerator compartment 10 enters the machine room 38 and is connected in turn to the inlet side of the dryer 45 and the three-way valve 46.

  A refrigeration capillary tube 47, a refrigeration cooler 30, a refrigeration accumulator 48, and a refrigeration suction pipe 49 as pressure reducing means are sequentially connected to one outlet of the three-way valve 46 by piping. To the other outlet of the three-way valve 46, a refrigeration capillary tube 54, a refrigeration cooler 34, a refrigeration accumulator 55, a refrigeration suction pipe 56 and a check valve 57 as pressure reducing means are sequentially connected by piping. The outlet side of the check valve 57 and the outlet side of the refrigerated suction pipe 49 are connected together and connected to the suction side of the compressor 39.

  In such a refrigeration cycle 41, the refrigerant is compressed by the compressor 39 and changed into a high-temperature and high-pressure gaseous refrigerant, and the evaporation pipe 40, the condenser 42, the heat radiating pipe 43, the heating pipe 58, and the dew prevention pipe 44. It becomes a liquid refrigerant while dissipating heat. The liquid refrigerant is sent to the refrigerated capillary tube 47 or the frozen capillary tube 54 by the three-way valve 46, and is decompressed so that it can be easily vaporized in each capillary tube 47, 54, and then the refrigerated cooler 30 or the freezer cooler 34. It vaporizes and cools the refrigeration cooler 30 or the freezing cooler 34. The refrigerant that has cooled the refrigeration cooler 30 or the refrigeration cooler 34 flows to the accumulators 48 and 55, respectively. In each of the accumulators 48 and 55, the refrigerant in the gas-liquid mixture is changed into a gaseous refrigerant and a liquid refrigerant, respectively. Only the gaseous refrigerant is separated, returns to the compressor 39 via the suction pipes 49 and 56, and is compressed again to become a high-temperature and high-pressure gaseous refrigerant.

  The refrigeration cooler 30 exchanges heat with the air in the refrigeration cooler chamber 32 to generate cold air. The generated cold air is introduced into the refrigerator compartment 10 and the vegetable compartment 12 through the duct 33 by the blowing action of the refrigerator fan 31, and cools the storage compartments 10 and 12. The cold air that has finished cooling the refrigerator compartment 10 and the vegetable compartment 12 is returned to the refrigerator refrigerator chamber 32 from the suction port again, and is cooled again by exchanging heat with the refrigerator refrigerator 30.

  The refrigeration cooler 34 exchanges heat with the air in the refrigeration cooler chamber 36 to generate cold air. The generated cold air is introduced into the ice making chamber 15, the temperature switching chamber 16 and the freezing chamber 17 through the duct 37 by the blowing action of the freezing fan 35, and cools the storage chambers 10 and 12. The cold air that has finished cooling the ice making chamber 15, the temperature switching chamber 16, and the freezer compartment 17 is returned to the freezer cooler chamber 36 through the suction port and is cooled by exchanging heat with the freezer cooler 34.

  In such a refrigerator 1, the temperature switching chamber 16 includes a damper 62 that changes the opening degree of the outlet 61 from which the cold air generated in the refrigeration cooler chamber 36 blows out, and a heater 60 that heats the air in the temperature switching chamber 16. , And a first heating pipe 58 is provided. Thereby, the temperature switching chamber 16 has a storage temperature (internal temperature) of a plurality of temperature zones, for example, a weak freezing temperature zone of −9 ° C. to −8 ° C. or lower, a partial temperature zone of −4 ° C. to −3 ° C., 0 The temperature can be changed to a chilled temperature range of 1 ° C to 1 ° C.

  Specifically, the temperature switching chamber 16 includes the heat insulating partition wall 6 that forms the upper surface wall, the heat insulating partition wall 23 that forms the lower surface wall, the heat insulating partition wall 22 that forms the left side wall, and the heat insulation that forms the right side wall. The box body 2 is partitioned by a right side wall 2a and an evaporative cover 51 constituting the back wall, and the front surface of the temperature switching chamber 16 is closed by a door 18. That is, the temperature switching chamber 16 is partitioned by the heat insulating material at the top, bottom, left, and right. The heat insulating partition walls 6, 22, and 23 that partition the temperature switching chamber 16, the right side wall 2 a of the heat insulating box 2, and the heat cover 51 may be any foam insulating material such as urethane or polystyrene, or a vacuum heat insulating material. However, a plurality of types of heat insulating materials may be used in combination, and it is preferable to use a vacuum heat insulating material and urethane foam in combination.

  As shown in FIGS. 2 and 4, a heater 60 is provided on the heat insulating partition wall 23 constituting the lower surface wall of the temperature switching chamber 16 together with the first heating pipe 58 described above. The heater 60 is a sheet-like heater such as an aluminum foil heater provided along the upper surface of the heat insulating partition wall 23, and heats the air in the temperature switching chamber 16 from below by energization.

  In the present embodiment, the first heat pipe 58 and the heater 60 are all provided in the heat insulating partition wall 23 constituting the lower surface wall of the temperature switching chamber 16, but provided on any wall surface that partitions the temperature switching chamber 16. Alternatively, the first heating pipe 58 and the heater 60 may be provided on different wall surfaces.

  A control unit 24 that controls the overall operation of the refrigerator 1 is provided at the upper back of the heat insulating box 2. As shown in FIG. 5, the control unit 24 is a non-volatile recording medium such as a signal input from various sensors such as the operation panel 8, the refrigeration temperature sensor 25, the refrigeration temperature sensor 26, the switching room temperature sensor 27, or the like. Based on a control program stored in the memory 28, various electric components such as the refrigeration fan 31, the refrigeration fan 35, the compressor 39, the three-way valve 46, the heater 60, the first switching valve 59, and the damper 62 are controlled. Then, each chamber is cooled to a predetermined temperature.

  Specifically, when cooling the refrigerator compartment 10 and the vegetable compartment 12 in the refrigerator temperature zone, the control unit 24 switches the three-way valve 46 provided in the refrigeration cycle 41 so that the refrigerant flows into the refrigerator refrigerator 30. And the refrigeration mode for operating the refrigeration fan 31 is executed. Thereby, the air in the refrigeration cooler chamber 32 cooled by the refrigeration cooler 30 is blown to the refrigeration chamber 10 and the vegetable compartment 12 through the duct 33, and the refrigeration temperature sensor 25 provided on the back surface of the refrigeration chamber 10. The refrigerator compartment 10 and the vegetable compartment 12 are cooled so that the detected temperature falls within a predetermined temperature range.

  When cooling the ice making chamber 15 and the freezing chamber 17, the control unit 24 switches the three-way valve 46 provided in the refrigeration cycle 41 so that the refrigerant flows to the refrigeration cooler 34 and operates the refrigeration fan 35. The refrigeration mode is executed. Thereby, the air cooled by the freezer cooler 34 is blown to the ice making chamber 15 and the freezing chamber 17 so that the temperature detected by the freezing temperature sensor 26 provided on the back surface of the freezing chamber 17 falls within a predetermined temperature range. 15 and the freezer compartment 17 are cooled.

  When the temperature switching chamber 16 is cooled, the first switching valve 59 is switched while controlling the opening degree of the damper 62 and adjusting the amount of cool air supplied to the temperature switching chamber 16 during the execution of the refrigeration mode. By controlling the amount of heat generated by the heater 60, the temperature switching chamber 16 is cooled so that the temperature detected by the switching chamber temperature sensor 27 provided on the back surface of the temperature switching chamber 16 falls within the set temperature range.

  For example, when the storage temperature of the temperature switching chamber 16 is set to the weak refrigeration temperature zone, the control unit 24 bypasses the first heating pipe 58 so that the refrigerant flows through the left radiating pipe 43A and the right radiating pipe 43D. The flow path of the 1 switching valve 59 is switched, and the power supply to the heater 60 is shut off. That is, when the temperature switching chamber 16 is set in the weak refrigeration temperature zone, the control unit 24 introduces cold air to be introduced into the temperature switching chamber 16 without heating the temperature switching chamber 16 by the first heating pipe 58 or the heater 60. By adjusting the amount, the temperature of the temperature switching chamber 16 is controlled to the weak freezing temperature range.

  When the storage temperature of the temperature switching chamber 16 is set to the partial temperature range, the control unit 24 controls the first switching valve 59 so that the refrigerant flows alternately to the first heating pipe 58 and the left heat radiating pipe 43A, The power supply to the heater 60 is cut off. That is, when the temperature switching chamber 16 is set in the partial temperature zone, the control unit 24 heats the temperature switching chamber 16 with the first heating pipe 58 without heating the temperature switching chamber 16 with the heater 60, The temperature of the temperature switching chamber 16 is controlled to the partial temperature zone by adjusting the amount of cold air introduced into the switching chamber 16. Further, if necessary, the opening degree of the damper 62 is controlled during execution of the refrigeration mode to supply cold air to the temperature switching chamber 16.

  When the storage temperature of the temperature switching chamber 16 is set to the chilled temperature zone, the control unit 24 controls the first switching valve 59 so that the refrigerant flows alternately to the first heating pipe 58 and the left heat radiating pipe 43A, The energization amount supplied to the heater 60 is controlled. That is, when the temperature switching chamber 16 is set in the chilled temperature zone, the control unit 24 heats the temperature switching chamber 16 with the first heating pipe 58 or the heater 60 or sets the amount of cold air introduced into the temperature switching chamber 16. By adjusting the temperature, the temperature of the temperature switching chamber 16 is controlled in a chilled temperature range. Further, if necessary, the opening degree of the damper 62 is controlled during execution of the refrigeration mode to supply cold air to the temperature switching chamber 16.

  In the case where the storage temperature of the temperature switching chamber 16 is controlled, the control unit 24 controls the switching of the first switching valve 59 and the amount of heat generated by the heater 60 as necessary other than during the execution of the freezing mode, The temperature switching chamber 16 may be heated.

  In such a refrigerator 1 of this embodiment, since the 1st heating pipe 58 and the heater 60 which heat the air of the temperature switching chamber 16 are provided in the wall surface which comprises the temperature switching chamber 16, the temperature range which can be switched is provided. The temperature can be set over a wide temperature range, and the internal temperature of the temperature switching chamber 16 can be accurately controlled.

  Moreover, in the refrigerator 1 of this embodiment, since the 1st heating pipe 58 heats the temperature switching chamber 16 in addition to the heater 60, while being able to heat the temperature switching chamber 16 while suppressing the energization amount of the heater 60, high temperature The refrigerant flowing through the refrigerant passage on the side can be cooled by exchanging heat with the cold heat of the temperature switching chamber 16, and the power consumption of the refrigerator 1 can be suppressed.

  Further, in the present embodiment, in addition to the first heating pipe 58, the temperature switching chamber 16 is provided with a heater 60 for heating the temperature switching chamber 16, so that the temperature switching chamber 16 is provided regardless of the operating state of the refrigeration cycle 41. It can be heated and controlled to a set temperature range.

  In the present embodiment, when the temperature switching chamber 16 is set to the partial temperature zone, the heater 60 is not energized, the temperature switching chamber 16 is heated by the first heating pipe 58, and the temperature switching chamber 16 is set to the partial temperature zone. When set to a lower chilled temperature zone, the temperature switching chamber 16 is heated by the heater 60 in addition to the first heating pipe 58. Thus, in this embodiment, since the 1st heating pipe 58 is used preferentially over the heater 60, electricity supply of the heater 60 can be suppressed as much as possible, and the power consumption of the refrigerator 1 can be suppressed.

  Moreover, in this embodiment, since the partition wall which partitions the temperature switching chamber 16 is provided with a heat insulating material, and the temperature switching chamber 16 is partitioned not only outside but also with an adjacent storage chamber, the temperature switching chamber 16 The heat leakage from the refrigerator 1 can be suppressed, and the power consumption of the refrigerator 1 can be suppressed.

  In the present embodiment, the heater 60 is provided in the temperature switching chamber 16 in addition to the first heating pipe 58. However, the first heating pipe 58 is provided in the temperature switching chamber 16 without providing the heater 60, and the temperature switching chamber 16. May be heated by the first heating pipe 58.

(Second Embodiment)
The second embodiment will be described mainly with reference to FIG. 6 with a focus on differences from the first embodiment. In addition, the same code | symbol is attached | subjected about the thing of the same structure as 1st Embodiment, and description of the structure is abbreviate | omitted.

  As shown in FIG. 6, in the present embodiment, a first heating pipe 58 and a first switching valve 59 are provided between the condenser 42 and the ceiling heat radiating pipe 43B, and the back plate heat radiating pipe 43C and the dew proof pipe 44 are provided. The 2nd heating pipe 63 and the 2nd switching valve 64 are provided between these.

  The 2nd heating pipe 63 consists of a heat radiating pipe provided in parallel with the right heat radiating pipe 43D, and is provided along the upper surface side of the heat insulation partition wall 23 which comprises the lower surface of the temperature switching chamber 16, for example.

  The 2nd switching valve 64 consists of a three-way valve provided in the machine room 38, the inlet side is connected to the back plate heat radiating pipe 43C, and the right heat radiating pipe 43D and the second heating pipe 63 are connected to the outlet side. The second switching valve 64 switches the refrigerant immediately after flowing through the back plate heat radiating pipe 43C between the second heating pipe 63 and the right heat radiating pipe 43D. As a result, the high-temperature refrigerant flows through the second heating pipe 63 to heat the inside of the temperature switching chamber 16, or bypasses the second heating pipe 63 and flows into the right heat radiating pipe 43D, whereby the right side wall of the heat insulating box 2 Or heating.

  That is, in this embodiment, the left heat radiating pipe 43A functions as a bypass pipe that bypasses the first heating pipe 58, and the right heat dissipation pipe 43D functions as a bypass pipe that bypasses the second heating pipe 63.

  In such an embodiment, since the second heating pipe 63 and the second switching valve 64 are provided downstream of the first heating pipe 58 in the refrigerant flow direction, the refrigerant having a temperature lower than that of the first heating pipe 58 is second heated. The temperature switching chamber 16 can be heated by flowing through the pipe 63. Therefore, the temperature switching chamber 16 can be heated with heat sources having different temperatures, and the storage temperature of the temperature switching chamber 16 can be accurately controlled within a set temperature range.

  Other configurations and operational effects are the same as those of the first embodiment described above, and detailed description thereof is omitted.

(Third embodiment)
The third embodiment will be described with a focus on differences from the first embodiment.

  In this embodiment, the outside temperature sensor which detects the temperature (outside temperature) of the installation atmosphere of the refrigerator 1 is provided in the refrigerator compartment door 11, for example, and the control part 24 is based on the detected value of this temperature sensor. Controls the first switching valve 59.

  Specifically, when the detected temperature of the outside temperature sensor is equal to or higher than a predetermined temperature, the control unit 24 causes the amount of refrigerant flowing through the first heating pipe 58 to be smaller than when the detected temperature is lower than the predetermined temperature. The first switching valve 59 is controlled.

  If the temperature detected by the outside temperature sensor is equal to or higher than the predetermined temperature, the amount of heat entering the temperature switching chamber 16 from outside the chamber increases, and the storage temperature of the temperature switching chamber 16 tends to increase. In the refrigerator of this embodiment, since the amount of the refrigerant flowing through the first heating pipe 58 is reduced by controlling the first switching valve 59, the storage temperature of the temperature switching chamber 16 can be accurately controlled.

  Note that the ice making room 15 and the freezing room 17 have a lower storage temperature than other storage rooms, and heat easily enters from outside the storage room. For this reason, if the temperature detected by the outside temperature sensor is equal to or higher than the predetermined temperature, the execution time of the freezing mode becomes long and the freezing cooler 34 may be in a low temperature state for a long time, and the temperature switching chamber 16 becomes freezing cooler 34. If it is arranged in the vicinity, the cold heat of the refrigeration cooler 34 may enter the temperature switching chamber 16 and the storage temperature of the temperature switching chamber 16 tends to be lowered. Therefore, in such a case, if the detected temperature of the outside temperature sensor is equal to or higher than the predetermined temperature, the amount of refrigerant flowing through the first heating pipe 58 is increased as compared with the case where the detected temperature is lower than the predetermined temperature. Alternatively, the first switching valve 59 may be controlled.

  Other configurations and operational effects are the same as those of the first embodiment described above, and detailed description thereof is omitted.

(Fourth embodiment)
The fourth embodiment will be described with a focus on differences from the first embodiment.

  In the first embodiment described above, a case has been described in which the machine room 38 is provided in the lower back portion of the heat insulation box 2 and the compressor 39, the first switching valve 59, and the like are housed therein. A machine room in which the compressor 39 and the first switching valve 59 are housed may be provided at the upper back of the machine.

  In this embodiment, it becomes easy to ensure the installation space of the 1st switching valve 58 in a machine room by making the space of the back upper part of the heat insulation box 2 difficult to use effectively in a store | warehouse | chamber.

  Other configurations and operational effects are the same as those of the first embodiment described above, and detailed description thereof is omitted.

(Fifth embodiment)
The fifth embodiment will be described with a focus on differences from the first embodiment.

  In the first embodiment described above, when the storage temperature of the temperature switching chamber 16 is set to a temperature zone higher than a predetermined temperature (for example, a chilled temperature zone or a higher temperature zone), the storage temperature is set to a predetermined temperature or lower. Compared to the above, the operating frequency of the compressor 39 is set higher.

  In this embodiment, the amount of refrigerant flowing through the first heating pipe 58 can be controlled according to the temperature zone set in the temperature switching chamber 16, and the storage temperature of the temperature switching chamber 16 is set in the set temperature zone. Can be accurately controlled.

  Other configurations and operational effects are the same as those of the first embodiment described above, and detailed description thereof is omitted.

(Other embodiments)
As mentioned above, although embodiment of this invention was described, these embodiment was shown as an example and is not intending limiting the range of invention. These embodiments can be implemented in various other forms, 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 invention described in the claims and equivalents thereof as well as included in the scope and gist of the invention.

DESCRIPTION OF SYMBOLS 1 ... Refrigerator, 2 ... Thermal insulation box, 10 ... Cold room, 12 ... Vegetable room, 15 ... Ice making room, 16 ... Temperature switching room, 17 ... Freezing room, 22 ... Thermal insulation partition wall, 23 ... Thermal insulation partition wall, 24 ... Control part, 25 ... Refrigeration temperature sensor, 26 ... Refrigeration temperature sensor, 27 ... Switching room temperature sensor, 30 ... Refrigeration cooler, 31 ... Refrigeration fan, 32 ... Refrigeration cooler room, 34 ... Refrigeration cooler, 35 ... Refrigeration fan 36 ... Refrigeration cooler room, 38 ... Machine room, 39 ... Compressor, 40 ... Evaporation pipe, 41 ... Refrigeration cycle, 42 ... Condenser, 43 ... Radiation pipe, 43A ... Left heat radiation pipe, 43B ... Ceiling heat radiation pipe, 43C ... Back plate heat radiating pipe, 43D ... Right heat radiating pipe, 44 ... Dew proof pipe, 51 ... Eva cover, 58 ... First heating pipe, 59 ... First switching valve, 60 ... Heater, 61 ... Air outlet, 62 ... Damper

Claims (6)

A heat insulating box having a refrigeration cycle having a compressor, a cooler, and a high-temperature side refrigerant flow path for flowing the refrigerant pumped from the compressor to the cooler, and a storage chamber to which cold air cooled by the cooler is supplied In a refrigerator with a body,
The high temperature side refrigerant flow path is provided along an inner wall of the storage chamber and heats the storage chamber, a first bypass pipe that bypasses the first heating pipe, and the first heating pipe. A refrigerator comprising: a switching valve that switches to the first bypass pipe and flows a refrigerant.   The high temperature side refrigerant flow path is provided on the downstream side of the first heating pipe and the first bypass pipe along the inner wall of the storage chamber, and a second heating pipe for heating the storage chamber, and the second heating pipe The refrigerator according to claim 1, further comprising: a second bypass pipe that bypasses the pipe; and a second switching valve that switches to the second heating pipe and the second bypass pipe to flow the refrigerant.   The refrigerator according to claim 1 or 2, further comprising a heater provided along the inner wall of the storage chamber to heat the storage chamber by energization. A controller that controls the first switching valve and the heater to switch the temperature in the storage chamber to a different temperature zone;
The controller controls the first switching valve so that the refrigerant flows through the first heating pipe while stopping energization of the heater when the temperature in the storage chamber is set to a predetermined temperature or lower, The refrigerator according to claim 3, wherein when the temperature is higher than the predetermined temperature, the first switching valve is controlled so that the refrigerant flows through the first heating pipe while energizing the heater. It has a temperature sensor that detects the temperature of the installation atmosphere of the refrigerator,
The refrigerator according to any one of claims 1 to 4, wherein the first switching valve is controlled based on a detection value of the temperature sensor.   The refrigerator according to any one of claims 1 to 5, wherein a heat insulating material is provided on a partition wall that partitions the storage chamber.

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