JP4429949B2 - refrigerator - Google Patents

Description

  The present invention relates to a refrigerator including a temperature switching chamber that can be switched to a desired room temperature by a user.

  In recent years, where the living environment has changed significantly, more and more families have different times for their families to eat. For this reason, in order to keep the heated food warm, a heat insulation box or a heat storage container is used. Thereby, the effort which cooks many times can be saved.

On the other hand, Patent Document 1 discloses a refrigerator provided with a temperature switching chamber in addition to a freezer compartment and a refrigerator compartment. This refrigerator includes a damper device that opens and closes a passage of cool air sent to the temperature switching chamber, and a heater that raises the temperature of the temperature switching chamber. Thereby, the room temperature of the temperature switching chamber can be switched to a desired low temperature range such as freezing, refrigeration, partial, chilled, etc. according to the user's application.
Japanese Patent Laid-Open No. 10-288440

  However, when a heat insulation box or a storage container is used to keep the heated food warm, there is a problem that it is difficult to secure an installation place and a problem that a user's economic burden is increased. In addition, there is a problem in that it requires a complicated operation of transferring the food and is not convenient.

  It is an object of the present invention to provide a highly convenient refrigerator that reduces economic burden and facilitates securing of a place.

In order to achieve the above-mentioned object, the present invention provides a low temperature side for storing a stored product by cooling with a cooling device that circulates a flammable refrigerant to operate a refrigeration cycle and heating by a heater, and a high temperature for keeping heated food. In the refrigerator having a temperature switching chamber capable of switching the room temperature to the side, the refrigerator includes a blower that circulates the air in the temperature switching chamber, and the heater includes a heat radiation type glass tube heater, and the temperature of the heater is a predetermined temperature. It is characterized in that the cold air generated by the cooling device is sent to the temperature switching chamber when the temperature exceeds .

According to this configuration, when the temperature switching chamber is switched to the low temperature side, cold air is introduced from the cooling device to become a low temperature chamber for freezing, partial, chilled, refrigerated, or the like. Thereby, a store thing can be stored refrigerated or frozen. When the temperature switching chamber is switched to the high temperature side, the heater and the blower are driven, and high temperature air is circulated to raise the temperature of the chamber. As a result, Ru can be temporary warmth of cooked food.

Further, the present invention is characterized in that in the refrigerator having the above-described configuration, the capacity of the heater is reduced when the blower stops. According to this configuration, when the blower stops abnormally, the capacity of the heater is reduced and the temperature rise of the heater is suppressed.

Moreover, the present invention is characterized in that, in the refrigerator having the above-described configuration, the heater is stopped when the blower is stopped . According to this configuration, when the blower stops, the capacity of the heater is reduced and the heater is stopped. Thereby, the temperature rise of a heater is suppressed.

Or the present invention, in the refrigerator structured as described above, the heater is characterized by having a glass tube of singlet covering the heater wire.

According to the present invention, since the temperature switching chamber that can switch the room temperature between the low temperature side for storing the refrigerated or frozen storage and the high temperature side for keeping the heated food is provided, the economic burden for keeping the heated food warm is provided. It is possible to provide a highly convenient refrigerator while reducing the location and making it easy to secure a place. In addition, when the temperature of the heater exceeds a predetermined temperature, the cool air generated by the cooling device is sent to the temperature switching chamber, so that the temperature rise on the glass tube surface can be suppressed and the IEC standard can be satisfied.

  According to the present invention, since the heater is stopped when the blower is stopped, the temperature increase on the surface of the glass tube can be suppressed and the IEC standard can be satisfied even if a single glass tube is used.

Also, according to the present invention, the cost of the refrigerator is reduced by using a heater that covers the heater wire with a single glass tube, and the capacity of the heater is reduced when the blower is stopped. It is possible to satisfy the IEC standard by suppressing the temperature rise on the tube surface.

  Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 are a front view and a right side view showing a refrigerator according to one embodiment. The refrigerator 1 is provided with a refrigerator compartment 2 in the upper stage, and a temperature switching room 3 and an ice making room 4 in the middle stage. A vegetable room 5 and a freezer room 6 are arranged in the lower stage of the refrigerator 1.

  The refrigerating room 2 has a double door and stores stored items in a refrigerator. The temperature switching chamber 3 is provided on the left side of the middle stage, and the room temperature can be switched by the user. The ice making chamber 4 is provided on the right side of the middle stage and performs ice making. The vegetable room 5 is provided on the lower left side, and is maintained at a temperature suitable for storing vegetables (for example, about 8 ° C.). The freezer compartment 6 is provided on the lower right side and communicates with the ice making compartment 4 to store the stored items in a frozen state.

  FIG. 3 is a right side sectional view of the refrigerator 1. The freezing compartment 6 and the ice making compartment 4 are provided with a storage case 11 for storing stored items. A similar storage case 11 is also provided in the vegetable room 5 and the temperature switching room 3. The refrigerator compartment 2 is provided with a plurality of storage shelves 41 on which stored items are placed. A storage pocket 42 is provided on the door of the refrigerator compartment 2. Thereby, the usability of the refrigerator 1 is improved. A chilled chamber 23 maintained at a chilled temperature zone (about 0 ° C.) is provided in the lower part of the refrigerator compartment 2.

  A cold air passage 31 is provided behind the freezer compartment 6, and an evaporator 17 connected to the compressor 35 is disposed in the cold air passage 31. A cold air passage 32 communicating with the cold air passage 31 is provided behind the refrigerator compartment 2. A refrigeration cycle is operated by driving a compressor 35 connected to a condenser and an expander (both not shown) to circulate combustible refrigerant such as isobutane. As a result, the evaporator 17 on the low temperature side of the refrigeration cycle exchanges heat with air to generate cold air. Therefore, the compressor 35 and the evaporator 17 constitute a cooling device that generates cold air together with the condenser and the expander.

  Further, blowers 18 and 28 are arranged in the cold air passages 31 and 32, respectively. As will be described in detail later, the cold air generated by the evaporator 17 is supplied to the freezer compartment 6, the ice making chamber 4, the chilled chamber 23, and the temperature switching chamber 3 through the cold air passage 31 by driving the blower 18. Further, the fan 28 is supplied to the refrigerator compartment 2 and the vegetable compartment 5 through the cold air passage 32.

  FIG. 4 is a right side sectional view showing the temperature switching chamber 3. The upper and lower surfaces of the temperature switching chamber 3 are partitioned from the refrigerator compartment 2 and the vegetable compartment 5 by heat insulating walls 7 and 8. The front surface of the temperature switching chamber 3 can be opened and closed by a rotating door 9. The back surface of the temperature switching chamber 3 is covered with a back plate 33. A drawer type storage case 11 is provided in the temperature switching chamber 3.

  An introduction ventilation path 12 is provided behind the back plate 33 and the heat insulating wall 10 that forms the outer wall. The introduction air passage 12 connects an inflow port 33a provided in the back plate 33 and a cold air passage 31 (see FIG. 3). Further, a temperature switching chamber discharge damper 13 is provided in the introduction ventilation path 12. By opening the temperature switching chamber discharge damper 13, cold air generated in the evaporator 17 (see FIG. 3) is guided to the temperature switching chamber 3.

  A blower 14 is provided between the temperature switching chamber discharge damper 13 and the inflow port 33a. An outflow port 33b opens below the back plate 33, and the cool air in the cold air passage 31 is easily guided to the temperature switching chamber 3 through the inflow port 33a by the drive of the blower 14, and flows out from the outflow port 33b. Further, the air volume flowing into the temperature switching chamber 3 from the introduction ventilation path 12 is adjusted by opening and closing the temperature switching chamber discharge damper 13.

  A return ventilation path 19 for returning air to the cooling device 17 is provided behind the outflow port 33b. A temperature switching chamber return damper 20 that opens to face the outlet 33 b is provided in the return ventilation path 19. Openings 20b and 20c are formed behind and above the temperature switching chamber return damper 20, and a rotatable baffle 20a that alternatively closes the openings 20b and 20c is provided.

  By closing the opening 20 c and opening the opening 20 b, the air flowing out from the outlet 33 b can flow through the return ventilation path 19. When the opening 20b is closed and the opening 20c is opened, the air flowing out from the outlet 33b is guided to the intake side of the blower 14 as shown in FIG. As a result, a communication passage 36 is formed which communicates from the outlet port 33b to the intake side of the blower 14 through the opening 20c of the temperature switching chamber return damper 20. Therefore, the air in the temperature switching chamber 3 can be circulated through the communication path 36 by driving the blower 14.

  A heater 15 is provided at the rear upper part of the back plate 33 of the temperature switching chamber 3. FIG. 6 is a side sectional view showing the heater 15. The heater 15 is a thermal radiation type glass tube heater, and the heater wire 15a is covered with a single glass tube 15b. Both ends of the glass tube 15b are sealed with caps 15c and 15d made of rubber or the like. Since the heater wire 15a is covered with the single glass tube 15b, the heater 15 can be configured at low cost. Therefore, the cost of the refrigerator 1 can be reduced.

  When the heater wire 15a is energized, radiant heat is released through the back plate 33, and the temperature switching chamber 3 is heated. IEC (International Electrotechnical Commission) standard 60335-2-24 defines safety when a flammable refrigerant leaks. According to this, it is necessary to make the surface temperature of the heater 15 exposed to the flammable refrigerant lower by 100 K or more than the ignition temperature of the flammable refrigerant. For this reason, the blower 14 is disposed so as to blow toward the surface of the heater 15. Thereby, the surface temperature of the heater 15 can be lowered and safety can be improved. Further, as described in detail later, the IEC standard is satisfied by controlling the heater 15.

  A temperature sensor 16 is provided in the lower part behind the back plate 33. The temperature sensor 16 detects the temperature in the temperature switching chamber 3 and sends a detection signal to a control unit (not shown). Thereby, a control part controls the heater 15, the temperature switching chamber discharge damper 13, and the air blower 14 based on the detection result of the temperature sensor 16, and maintains the inside of the temperature switching chamber 3 at preset temperature.

  A temperature sensor 24 is provided adjacent to the upper side of the heater 15. The temperature sensor 24 is in close contact with the upper surface of the back plate 33 surrounding the heater 15. Thereby, the temperature sensor 24 detects a temperature substantially equal to the surface temperature of the heater 15. A temperature fuse 30 is provided above the temperature sensor 16. When the temperature fuse 30 reaches a predetermined temperature, the heater 15 is turned off.

  FIG. 7 shows a front sectional view of the vicinity of the middle stage of the refrigerator 1. The cool air passage 31 behind the freezer compartment 6 opens at the upper front of the blower 18, and air is sent to the ice making chamber 4 by the blower 18. A freezer compartment damper 22 is provided below the freezer compartment 6 that communicates with the ice making compartment 4. A return ventilation path 21 (see FIG. 3) is provided in the lower rear portion of the freezer compartment 6 to guide air to the evaporator 17 via the freezer damper 22 and return it to the cool air passage 31. The air volume of the air coming out of the freezer compartment 6 is adjusted by opening and closing the freezer compartment damper 22.

  The upper part of the cold air passage 31 communicates with the cold air passage 32 via the refrigerator compartment damper 27. Further, the cold air passage 31 is branched to form the introduction ventilation path 12, communicates with the chilled chamber 23 via the chilled chamber damper 25, and enters the temperature switching chamber 3 via the temperature switching chamber discharge damper 13 as described above. Communicate.

  A refrigerator outlet (not shown) is opened below the back of the refrigerator compartment 2, and a vegetable compartment inlet (not shown) is provided in the vegetable compartment 5. The refrigerator compartment outlet and the vegetable compartment inlet are connected by a passage (not shown) passing through the back surface of the temperature switching chamber 3 so that the refrigerator compartment 2 and the vegetable compartment 5 communicate with each other.

  A return ventilation path 19 communicating with the temperature switching chamber 3 extends downward from the temperature switching chamber return damper 20 and is disposed behind the temperature switching chamber 3 and the vegetable chamber 5. The air in the temperature switching chamber 3 is guided to the evaporator 17 through the return ventilation paths 19 and 21 by opening the temperature switching chamber return damper 20. In addition, a vegetable room outlet (not shown) communicating with the return ventilation path 19 is provided on the back of the vegetable room 5.

  FIG. 8 is a cold air circuit diagram showing the flow of cold air in the refrigerator 1. The cold air generated in the evaporator 17 is sent up to the ice making chamber 4 by raising the cold air passage 31 as shown by an arrow A (see FIG. 7) by driving the blower 18. The cold air sent to the ice making room 4 flows through the ice making room 4 and the freezing room 6 and flows out from the freezing room damper 22. And it returns to the evaporator 17 via the return ventilation path 21. As a result, the ice making chamber 4 and the freezing chamber 6 are cooled.

  The cold air branched at the top of the cold air passage 31 by driving the blower 28 circulates through the cold air passage 32 through the cold room damper 27 as shown by an arrow B (see FIG. 7) and is sent to the cold room 2. Further, as shown by an arrow C (see FIG. 7), the air flows through the introduction ventilation path 12 and is sent to the chilled chamber 23.

  The cold air sent to the refrigerator compartment 2 and the chilled compartment 23 flows through the refrigerator compartment 2 and the chilled compartment 23 and then flows into the vegetable compartment 5. The cold air flowing into the vegetable compartment 5 flows through the vegetable compartment 5 and returns to the evaporator 17 via the return passages 19 and 21. Thereby, the inside of the refrigerator compartment 2 and the vegetable compartment 5 is cooled, and if it becomes preset temperature, the refrigerator compartment damper 27 and the chilled compartment damper 23 will be closed.

  Further, the cold air branched at the upper portion of the cold air passage 31 by the drive of the blower 14 flows through the introduction ventilation path 12 and reaches the temperature via the temperature switching chamber discharge damper 13 as shown by an arrow D (see FIGS. 4 and 7). It flows into the switching chamber 3. The cold air flowing into the temperature switching chamber 3 flows through the temperature switching chamber 3 and flows out from the outlet 33b. And as shown to the arrow E (refer FIG. 4, FIG. 7), it returns to the evaporator 17 via the return ventilation path 19 and 21. FIG. Thereby, the inside of the temperature switching chamber 3 is cooled.

  As described above, the temperature switching chamber 3 can switch the room temperature by the user. For example, the user can select each temperature zone of frozen (−15 ° C.), partial (−8 ° C.), chilled (0 ° C.), refrigerated (3 ° C.), vegetable (8 ° C.), and the like. Thereby, the user can preserve | save the stored matter frozen or refrigerated at desired temperature. The indoor temperature can be switched by changing the amount of opening the temperature switching chamber discharge damper 13 and the air volume of the blower 14.

  At this time, the baffle 20a of the temperature switching chamber return damper 20 is disposed so as to open the return air passage 19 and close the communication passage 36 as shown in FIG. For this reason, the cold air flowing in from the inflow port 33 a flows through the return ventilation path 19 via the temperature switching chamber return damper 20 without circulating through the communication path 36. Therefore, a short circuit due to the communication path 36 can be prevented, and the blowing efficiency of the blower 14 can be improved.

  For example, when the temperature switching chamber 3 is switched from the freezing indoor temperature to the refrigerated indoor temperature, the heater 15 may be energized to raise the temperature. Thereby, it can switch to desired room temperature rapidly. Further, by energizing the heater 15, the room temperature of the temperature switching chamber 3 is switched from the low temperature side where the stored items are stored frozen or refrigerated to the high temperature side where the cooked heated food is temporarily kept warm or cooked. Can be done.

  FIG. 9 is a flowchart showing the operation when the temperature switching chamber 3 is switched to the high temperature side. In step # 11, the blower 14 is turned on and the heater 15 is turned on. In step # 12, the temperature switching chamber discharge damper 13 is closed and the opening 20b is closed by the baffle 20a of the temperature switching chamber return damper 20, as shown in FIG. As a result, the air sent from the blower 14 as shown by the arrow F flows through the communication path 36 through the outlet 33b as shown by the arrow G. As a result, the air in the temperature switching chamber 3 is guided to the blower 14 through the temperature switching chamber return damper 20 and circulates as shown by the broken line S in FIG.

  In step # 13, it is detected by the temperature sensor 16 whether or not the room temperature of the temperature switching chamber 3 has risen to a predetermined upper limit temperature. If the temperature switching chamber 3 has not been heated to the upper limit temperature, the process proceeds to step # 15. When the temperature switching chamber 3 is heated to the upper limit temperature, the heater 15 is stopped in step # 14.

  In step # 15, it is detected by the temperature sensor 16 whether or not the room temperature of the temperature switching chamber 3 has dropped to a predetermined lower limit temperature. When the temperature switching chamber 3 is not lowered to the lower limit temperature, the process proceeds to step # 17. When the temperature switching chamber 3 is lowered to the lower limit temperature, the heater 15 is driven in step # 16. Thereby, ON and OFF of the heater 15 are repeated, and the temperature switching three chambers are maintained at a predetermined temperature.

  Therefore, the temperature switching chamber 3 can be sealed to prevent warm air from flowing out, and the blower 14 can be driven to make the temperature distribution in the temperature switching chamber 3 on the high temperature side uniform. Smoke, etc. can be prevented.

  In step # 17, it is detected whether or not the blower 14 has been stopped due to an abnormality such as a failure. When the blower 14 is driven, the process proceeds to step # 20. When the blower 14 is stopped, the capacity of the heater 15 is reduced at step # 18. Thereby, the temperature rise on the surface of the glass tube 15b of the heater 15 can be suppressed and the above IEC standard can be satisfied.

  In step # 19, it is notified that the blower 14 has been stopped by a light emitting element, a buzzer, or the like. Thereby, a user can recognize abnormality easily. The heater 15 may be stopped when the blower 14 is stopped. Thereby, the temperature rise on the surface of the glass tube 15b of the heater 15 can be suppressed and the above IEC standard can be satisfied.

  In Step # 20, it is detected by the temperature sensor 24 whether or not the surface temperature of the heater 15 has increased to a predetermined upper limit temperature. If the heater 15 has not been heated to the upper limit temperature, the process proceeds to step # 22. When the heater 15 is heated to the upper limit temperature, the temperature switching chamber discharge damper 13 is opened in step # 21, and the opening 20b is opened by the baffle 20a of the temperature switching chamber return damper 20. Thereby, the cold air that has flowed in through the temperature switching chamber discharge damper 13 passes through the temperature switching chamber 3. Therefore, the temperature increase on the surface of the glass tube 15b can be suppressed and the IEC standard can be satisfied.

  In step # 22, it is determined whether or not the opening 20b of the temperature switching chamber discharge damper 13 and the temperature switching chamber return damper 20 is open. When the opening 20b of the temperature switching chamber discharge damper 13 and the temperature switching chamber return damper 20 is closed, the process proceeds to step # 24. If the opening 20b of the temperature switching chamber discharge damper 13 and the temperature switching chamber return damper 20 is open, it is determined in step # 23 whether or not the surface temperature of the heater 15 has decreased to a predetermined temperature.

  When the surface temperature of the heater 15 falls to a predetermined temperature, the process returns to step # 12, and the opening 20b of the temperature switching chamber discharge damper 13 and the temperature switching chamber return damper 20 is closed. And the operation | movement after step # 13 is performed. If the surface temperature of the heater 15 has not decreased to the predetermined temperature, it is determined in step # 24 whether or not the set temperature of the temperature switching chamber 3 has been switched to the low temperature side. When the set temperature of the temperature switching chamber 3 is switched to the low temperature side, the process proceeds to the processing at the low temperature side switching. When the set temperature of the temperature switching chamber 3 is not switched to the low temperature side, the process proceeds to step # 13, and steps # 13 to # 24 are repeatedly performed.

  The room temperature of the temperature switching chamber 3 on the high temperature side is 50 ° C. or more in consideration of tolerance of heater capacity, temperature distribution in the temperature switching chamber 3 and the like because the growth temperature of main food poisoning bacteria is 30 ° C. to 45 ° C. It is good to. Thereby, propagation of miscellaneous bacteria can be prevented. Moreover, since the heat-resistant temperature of the general resin parts used for a refrigerator is 80 degreeC, when the room temperature of a high temperature side shall be 80 degrees C or less, it can implement | achieve cheaply.

  In order to sterilize food poisoning bacteria, for example, in the case of enterohemorrhagic E. coli (pathogenic E. coli O157), heating at 75 ° C. for 1 minute is required. Therefore, it is more preferable that the room temperature on the high temperature side is set to 80 ° C. in consideration of the tolerance of the heater capacity and the temperature distribution in the temperature switching chamber 3.

The following are the test results on the sterilization of food poisoning bacteria at 55 ° C. In the initial state, E. coli 2.4 × 10 ³ CFU / mL, Staphylococcus aureus 2.0 × 10 ³ CFU / mL, Salmonella 2.1 × 10 ³ CFU / mL, Vibrio parahaemolyticus 1.5 × 10 ³ CFU / ML, Cereus 4.0 × 10 ³ CFU / mL. This test sample was heated from 3 ° C. to 55 ° C. over 40 minutes, kept at 55 ° C. for 3.5 hours, then returned from 55 ° C. to 3 ° C. over 80 minutes, and the amount of each bacterium was examined again. As a result, all the bacteria were reduced to a level of 10 CFU / mL or less (not detected). Therefore, even if the set temperature on the high temperature side of the temperature switching chamber 3 is 55 ° C., there is a sufficient sterilization effect.

  As described above, the heater 15 is a thermal radiation type glass tube heater. If the heater 15 is a heat conduction heater such as an inexpensive sheet-like aluminum vapor deposition heater, the heating speed is slow. For this reason, when the temperature switching chamber 3 is set to the high temperature side, it takes a long time to pass through the temperature range of 30 to 45 ° C., which is the growth temperature range of food poisoning bacteria, and the food hygiene safety is lowered. If the capacity of the heater is increased in order to increase the heating speed, there is a restriction on the heat resistant temperature (usually about 80 ° C.) of the peripheral parts to which the heater is attached. Moreover, since the heat radiation surface becomes wide and extends to the vicinity of the temperature switching chamber 3, there is a risk that the user may be burned.

  On the other hand, the heat radiation type glass tube heater has a high heating speed and is safe for food hygiene. In addition, since the occupied space is small even if the capacity is increased, the risk of burns to the user is reduced by arranging it at the back of the temperature switching chamber 3 as shown in FIG.

  According to the present embodiment, since the temperature switching chamber capable of switching the room temperature between the low temperature side for storing the stored product in a refrigerated or frozen state and the high temperature side for maintaining the heated food is provided, an economic burden for keeping the heated food warm. In addition, it is possible to provide a highly convenient refrigerator by making it easy to secure a place.

  Moreover, the cost of the refrigerator 1 can be reduced by using the heater 15 which covers the heater wire 15a with the single glass tube 15b. In addition, when the blower 14 stops, the capacity of the heater 15 is reduced or the heater 15 is stopped. For this reason, even if the single glass tube 15b is used, the temperature rise on the surface of the glass tube 15b can be suppressed to a temperature lower by 100K or more than the ignition temperature (494 ° C.) of isobutane which is a flammable refrigerant, and the IEC standard can be satisfied. .

  In addition, when the temperature of the heater 15 exceeds a predetermined temperature, the cold air generated by the evaporator 17 is sent to the temperature switching chamber 3, so that even if a single glass tube 15b is used, the temperature of the surface of the glass tube 15b is increased. It can be suppressed to meet the IEC standard.

  In the present embodiment, a damper may be provided at the outlet of the vegetable compartment 5. Thereby, when the temperature switching chamber 3 is switched from the high temperature side to the low temperature side, it is possible to prevent the hot air from the temperature switching chamber 3 from flowing backward into the vegetable chamber 5 by closing the damper. In addition, when the blower 18 is stopped when the temperature switching chamber 3 is switched from the high temperature side to the low temperature side, the freezer compartment damper 22 is closed. Thereby, it is possible to prevent hot air from flowing backward from the freezer damper 22 into the freezer compartment 6 by driving the blower 14.

  ADVANTAGE OF THE INVENTION According to this invention, it can utilize for the refrigerator provided with the temperature switching chamber which can switch room temperature by the user.

The front view which shows the refrigerator of embodiment of this invention The right view which shows the refrigerator of embodiment of this invention Sectional drawing of right side which shows the refrigerator of embodiment of this invention Cross section of the right side showing the temperature switching chamber of the refrigerator of the embodiment of the present invention Cross section of the right side showing the temperature switching chamber of the refrigerator of the embodiment of the present invention Sectional drawing which shows the heater of the refrigerator of embodiment of this invention Front sectional drawing which shows the middle step part of the refrigerator of embodiment of this invention Cold air circuit diagram showing the flow of cold air in the refrigerator of the embodiment of the present invention The flowchart which shows the operation | movement at the time of making the temperature switching chamber of the refrigerator of embodiment of this invention into the high temperature side.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Refrigerator 2 Refrigeration room 3 Temperature switching room 4 Ice making room 5 Vegetable room 6 Freezing room 9 Door 12 Introduction ventilation path 13 Temperature switching room discharge damper 14, 18, 28 Blower 15 Heater 15a Heater wire 15b Glass tube 17 Evaporator 16, 24 Temperature sensor 19, 21 Return ventilation path 20 Temperature switching chamber return damper 22 Freezing chamber damper 25 Chilled chamber damper 30 Thermal fuse 31, 32 Cold air passage 33 Back plate 33a Inlet 33b Outlet 35 Compressor 36 Communication passage

Claims (4)

A temperature switching room that can switch the room temperature between the low temperature side that cools the stored items and the high temperature side that keeps the heated food by cooling with the cooling device that circulates the flammable refrigerant to operate the refrigeration cycle and heating with the heater In the refrigerator with
The heater comprises a heat radiation type glass tube heater and a blower that circulates the air in the temperature switching chamber.
A refrigerator characterized in that cold air generated by the cooling device is sent to the temperature switching chamber when the temperature of the heater exceeds a predetermined temperature.   The refrigerator according to claim 1, wherein the capacity of the heater is reduced when the blower is stopped.   The refrigerator according to claim 1 or 2, wherein the heater is stopped when the blower is stopped. The refrigerator according to any one of claims 1 to 3, wherein the heater has a single glass tube covering the heater wire.

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