JP4832966B2 - 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.

  Patent Document 1 discloses a refrigerator that includes 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.

  Patent Document 2 discloses a refrigerator in which a heater is provided in a temperature switching chamber and the temperature switching chamber can be maintained at a temperature higher than room temperature by driving the heater. Thereby, heat insulation of a heating thing, warm cooking, etc. can be performed.

  The temperature switching chamber is arranged side by side with the ice making chamber, and a refrigeration chamber is disposed above the temperature switching chamber and the ice making chamber. A vegetable room is arranged below the temperature switching room, and a freezing room communicating with the ice making room is arranged below the ice making room. The cooler is provided behind the freezer compartment, and the cool air of the cooler is discharged to the ice making chamber and the temperature switching chamber. The cool air discharged into the ice making chamber flows through the ice making chamber and the freezing chamber and then returns to the cooler. The cool air discharged to the temperature switching chamber flows through the temperature switching chamber and then returns to the cooler.

A refrigeration room damper is provided behind the ice making room. When the refrigerator compartment damper is opened, the cooler cooler flows behind the refrigerator compartment and the cooler is discharged into the refrigerator compartment. The cold air discharged into the refrigerator compartment flows through the refrigerator compartment and the vegetable compartment and returns to the cooler.
Japanese Patent Laid-Open No. 10-288440 JP 2006-125705 A

  However, in the refrigerator disclosed in Patent Document 2, cold air is sent to the refrigerating room via a refrigerating room damper disposed behind the ice making room. For this reason, the depth of the ice making chamber is narrowed, and the width of the ice making chamber is required to be wide in order to store the ice normally required. For this reason, there was a problem that the volume of the temperature switching chamber was reduced and the convenience of the refrigerator was poor.

  An object of this invention is to provide the refrigerator provided with the temperature switching chamber which can improve the convenience.

In order to achieve the above object, in the refrigerator of the present invention, cold air generated by the cooler flows through the first cold air passage and is sent to the freezer compartment, and communicates with the first cold air passage through the refrigerator compartment damper. In the refrigerator that flows through the second cold air passage and is sent to the refrigerating chamber, a temperature switching chamber that can be switched to a plurality of indoor temperatures including the freezing temperature, and a side of the temperature switching chamber via a vertical heat insulating wall made of a heat insulating material And an ice making chamber that communicates with the freezer and makes ice.
The freezing room is arranged below the refrigerating room, the temperature switching room and the ice making room are arranged between the refrigerating room and the freezing room, and the refrigerating room damper and the vertical heat insulating wall in front projection It has the feature that it has been arranged in the position which overlaps.

  According to this configuration, the cold air generated by the cooler is guided to the ice making room, the freezing room, and the temperature switching room via the first cold air passage, and the stored items are stored in a frozen state. When the refrigeration chamber damper disposed behind the vertical heat insulating wall that partitions the temperature switching chamber and the ice making chamber is opened, the cold air flowing through the first cold air passage is guided to the second cold air passage and discharged into the cold storage chamber. Thereby, the stored item in the refrigerator compartment is refrigerated. In the temperature switching chamber, the room temperature can be switched to refrigeration, partial, chilled, refrigerated, or the like.

  In the refrigerator having the above-described configuration, the present invention includes a heating device that heats the temperature switching chamber, and the temperature switching chamber is cooled and stored in a refrigerator including frozen storage by cooling with the cooler and heating by the heating device. It is characterized in that it can be switched between a low temperature side and a high temperature side that is higher than normal temperature.

  According to this configuration, when the temperature switching chamber is switched to the low temperature side, cold air is introduced from the cooler, and becomes a low temperature chamber for refrigeration, partial, chilled, refrigeration, and the like. Thereby, the stored product can be stored in a cold state. When the temperature switching chamber is switched to the high temperature side, the heating device is driven, the temperature switching chamber is heated, and the temperature switching chamber becomes the high temperature chamber. Thereby, the heat insulation of the heat-cooked food can be performed temporarily, or the temperature can be cooked in winter.

  In the refrigerator having the above-described configuration, the present invention further includes a refrigerating room blower that is arranged in the second cold air passage and sends out cold air to the refrigerating room, the refrigerating room blower having an axial direction in a vertical direction, It is characterized by being arranged at a position overlapping with a horizontal heat insulating wall surrounding the freezer compartment in front projection. According to this configuration, for example, the refrigerating room blower is disposed behind the heat insulating wall that forms the bottom wall of the refrigerating room. The refrigerating room blower has a low height with its axial direction facing up and down, and is disposed within the thickness of the heat insulating wall.

  Further, in the refrigerator having the above-described configuration, the foam heat insulating material is filled between the inner box that forms the inner surface of the main body and the outer box that forms the outer surface of the refrigerator. It is characterized in that it is injected into the heat insulating wall communicating with the box at the same time and foamed integrally.

  Further, in the refrigerator having the above-described configuration, the present invention includes a temperature switching chamber discharge damper that takes in the cold air generated by the cooler into the temperature switching chamber, and the refrigerator compartment damper is disposed above the vertical heat insulating wall, and The temperature switching chamber discharge damper is arranged in the lower part behind the temperature switching chamber. According to this configuration, when the temperature switching chamber discharge damper is opened, cool air from the cooler flows into the temperature switching chamber.

  In the refrigerator having the above-described configuration, the cooler includes a meandering refrigerant pipe and an accumulator connected to an upper end of the refrigerant pipe, and is installed behind the freezer compartment, and the accumulator is installed on the ice making compartment side. It is characterized by being arranged at the end.

  According to the present invention, in the refrigerator configured as described above, the volume of the temperature switching chamber is larger than the volume of the ice making chamber.

  According to the present invention, the vertical heat insulating wall that partitions the temperature switching chamber and the ice making chamber and the refrigeration chamber damper are arranged so as to overlap in front projection, so that the depth direction of the ice making chamber and the temperature switching chamber can be widened. Therefore, even if the width of the ice making chamber is narrowed, a necessary volume can be secured and a wide temperature switching chamber can be secured, and the convenience of the refrigerator is improved.

  Further, according to the present invention, the temperature switching chamber can be changed to a temperature higher than room temperature, so that the dead space behind the thick vertical heat insulating wall can be reduced and the volumetric efficiency can be improved.

  Further, according to the present invention, since the refrigerator compartment fan is arranged at a position where the axial direction of the refrigerator compartment fan is oriented in the vertical direction and overlaps in the front projection with the horizontal heat insulation wall surrounding the refrigerator compartment or the freezer compartment, it is frequently used. A wide internal volume of the refrigerator compartment can be secured. Therefore, the convenience of the refrigerator is further improved.

  Further, according to the present invention, the foamed heat insulating material stock solution is simultaneously injected between the outer box and the inner box into the heat insulating wall communicating therewith and foamed integrally, so that the heat insulating wall can be formed easily and thinly, The volume of the refrigerator compartment can be secured more widely.

  Further, according to the present invention, the refrigerator compartment damper is arranged at the upper part of the vertical heat insulation wall and the temperature switching chamber discharge damper is arranged at the lower part behind the temperature switching chamber, so that the interference between the refrigerator compartment damper and the temperature switching chamber discharge damper is caused. The refrigerator compartment damper can be arranged behind the vertical heat insulation wall.

  According to the present invention, since the cooler is installed behind the freezer compartment and the accumulator is disposed at the end of the ice making chamber, interference between the temperature switching chamber discharge damper and the accumulator can be easily avoided.

  In addition, according to the present invention, the volume of the temperature switching chamber is made larger than the volume of the ice making chamber, so that it is possible to ensure a necessary amount of ice storage and to keep more stored items warm or cold. Therefore, the convenience of the refrigerator can be further improved.

  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 at the top, and below the refrigerator compartment 2, a temperature switching chamber 3 and an ice making chamber 4 are arranged side by side. A freezing room 6 is arranged below the temperature switching room 3 and the ice making room 4, and a vegetable room 5 is arranged below the freezing room 6.

  The refrigerator compartment 2 stores stored items in a refrigerator, and the vegetable compartment 5 cools and preserves vegetables at a room temperature (about 8 ° C.) higher than the refrigerator compartment 2. As will be described later in detail, the temperature switching chamber 3 can be switched by the user at room temperature. The freezer 6 stores the stored items in a frozen state, and the ice making chamber 4 communicates with the freezer 6 to make ice.

  FIG. 3 is a right side sectional view of the refrigerator 1. The main body of the refrigerator 1 is filled with a foam heat insulating material 1c between the outer box 1a and the inner box 1b. The ice making chamber 4 and the temperature switching chamber 3 are separated from the refrigerator compartment 2 by a heat insulating wall 7, and the freezer compartment 6 and the vegetable compartment 5 are separated from each other by a heat insulating wall 8. Further, the temperature switching chamber 3 and the freezing chamber 6 are separated by a heat insulating wall 35 (see FIG. 4), and the temperature switching chamber 3 and the ice making chamber 4 are separated by a vertical heat insulating wall 36 (see FIG. 4). ing.

  When the foam heat insulating material 1c is filled between the outer box 1a and the inner box 1b, the heat insulating walls 7 and 8 are filled simultaneously. That is, the stock solution of the foam heat insulating material 1c is injected simultaneously between the outer box 1a and the inner box 1b and into the heat insulating walls 7 and 8 communicating with the outer box 1a, and is foamed integrally. For the conventional heat insulating walls 7 and 8, a heat insulating material such as a polystyrene foam different from the foam heat insulating material 1c between the outer box 1a and the inner box 1b has been used. By filling the heat insulating walls 7 and 8 simultaneously with the space between the outer box 1a and the inner box 1b with the foam heat insulating material 1c such as urethane foam heat insulating material, the heat insulating walls 7 and 8 can be easily formed thin. Therefore, the volume of the refrigerator compartment 2 can be ensured widely.

  Moreover, the exterior of the heat insulating walls 7 and 8 is made of a separate member from the inner box 1b, and the side surfaces of the heat insulating walls 7 and 8 are opened before filling with the foam heat insulating material 1c. Open oppositely. By filling the foam heat insulating material 1c, the openings on the side surfaces of the heat insulating walls 7 and 8 and the opening of the inner box 1b are connected and integrated. Thereby, the leakage of cold air or warm air between the storage chambers separated by the heat insulating walls 7 and 8 in different temperature zones is prevented. Thereby, energy saving by reduction of heat loss can be achieved. Moreover, the abnormal noise which generate | occur | produces by the vibration of the heat insulation walls 7 and 8 and the sliding of the heat insulation walls 7 and 8 and the inner case 1b by this vibration can be prevented. In addition, the structural strength can be increased by integral formation.

  The ice making room 4, the freezing room 6, the vegetable room 5 and the temperature switching room 3 are provided with a storage case 43 for storing stored items. The refrigerator compartment 2 is provided with a plurality of storage shelves 41 on which stored items are placed. A plurality of storage pockets 42 are provided on the door of the refrigerator compartment 2. Thereby, the usability of the refrigerator 1 is improved. Further, a chilled chamber 21 which is an isolation chamber maintained in a chilled temperature range (about 0 ° C.), for example, in a temperature range different from that of the refrigerated chamber 2 is provided in the lower part of the refrigerator compartment 2. Instead of the chilled chamber 21, an ice greenhouse maintained at an ice temperature (about −3 ° C.) may be used.

  A machine room 50 is provided behind the vegetable room 5, and a compressor 57 is disposed in the machine room 50. The compressor 57 is connected to a condenser, an expander (not shown), and a cooler 11, and a refrigerant such as isobutane is circulated by driving the compressor 57 to operate a refrigeration cycle. Thereby, the cooler 11 becomes the low temperature side of the refrigeration cycle.

  6 to 8 show a side view, a rear view, and a plan view in the machine room 50. The back surface of the machine room 50 is covered with a back cover 50a made of metal. An electrical component cover 52 is attached to the back cover 50a, and an electrical component 51 covered with the back cover 50a and the electrical component cover 52 is provided.

  The electrical component 51 includes electrical components including a control board 53 that controls the compressor 57 and each blower. Since the electrical unit 51 is installed in the machine room 50, it is possible to secure a large volume of the refrigerator room 2 that is frequently used as compared with the case where it is installed behind the refrigerator room 2, and to improve the convenience of the refrigerator 1. it can.

  A hole 52 a is provided on a side surface of the electrical cover 52. A lead wire holding portion 54 made of a resin molded product is fitted into the hole 52a. The lead wire holding unit 54 relays a lead wire (not shown) connected to the electrical component in the electrical component unit 51.

  The back cover 50 a and the electrical box 52 are in close contact with each other by a seal member 58. The seal member 58 is made of, for example, a rubber in a ring-like state, a sponge formed by independent foaming, or the like. A space between the lead wire holding portion 54 and the hole 52a is sealed by a seal member (not shown). Thereby, while the inside of the electrical equipment part 51 is sealed and waterproofed, when the combustible refrigerant leaks, it is possible to prevent ignition due to the intrusion of the combustible refrigerant into the electrical equipment part 51.

  The electrical cover 52 is formed by drawing a metal plate and can easily dissipate heat generated by the electrical component. In addition, a resin support base 55 that supports the control board 53 is brought into close contact with the electrical cover 52 so that heat generated by the control board 53 can be easily transmitted to the electrical cover 52.

  A condenser (not shown) is disposed on the bottom surface of the main body portion in front of the machine room 50, and a condenser fan 60 that cools the condenser is provided on the front surface of the machine room 50. When the condenser fan 60 is driven, outside air is taken in from an intake port 56 provided on the bottom surface of the main body, and the air exchanged heat with the condenser flows into the machine chamber 50 via the condenser fan 60. The condenser fan 60 sends air toward the electrical cover 52 and heat-exchanges with the electrical cover 52, and then cools the compressor 57. And it flows out from the corner side of the back cover 50a near the compressor 57 to the outside.

  Since air is sent toward the electrical cover 52 by the condenser fan 60, the heat generated by the electrical components can be radiated more efficiently. Alternatively, the electrical cover 52 may be formed of a resin molded product having a frame part on the front side, and a metal plate may be fitted to the frame part.

  In FIG. 3, a cold air passage 31 is provided behind the freezer compartment 6, and a cooler 11 is disposed in the cold air passage 31. Behind the refrigerator compartment 2 is provided a cold air passage 32 communicating with the cold air passage 31 via the refrigerator compartment damper 20. The cooler 11 on the low temperature side of the refrigeration cycle exchanges heat with the air flowing through the cold air passage 31 to generate cold air. A defrost heater 33 for defrosting the cooler 11 is provided below the cooler 11.

  In the cold air passages 31 and 32, the freezer compartment fan 12 and the refrigerator compartment fan 23 are respectively arranged. As will be described in detail later, the cold air generated by the cooler 11 flows through the front portion 31 a of the cold air passage 31 by driving the freezer compartment fan 12, and is supplied to the freezer compartment 6, the ice making chamber 4, and the temperature switching chamber 3. . The cold air is supplied to the refrigerator compartment 2, the chilled compartment 21 and the vegetable compartment 5 through the cold passage 32 by driving the refrigerator compartment fan 23.

  The refrigerating room blower 23 is composed of an axial fan, and is arranged with the axial direction directed up and down. Thereby, the refrigerator compartment fan 23 becomes low in a height direction, and the refrigerator compartment fan 23 and the heat insulation wall 7 can be arrange | positioned in the same horizontal surface so that it may overlap in a front projection. Therefore, the volume of the refrigerator compartment 2 with high use frequency can be secured widely. Further, the cold air can be guided to the cold air passage 32 with a low pressure loss. The refrigerator compartment fan 23 may be formed by a centrifugal fan. At this time, the suction port of the centrifugal fan is directed downward and the discharge port is disposed in the left-right direction, and the air flow is directed upward when discharging from the discharge port or after discharging.

  FIG. 4 shows a front sectional view of the refrigerator 1. The cold air passage 31 behind the freezer compartment 6 opens the front surface of the freezer compartment fan 12, and air is sent out to the ice making room 4 and the freezer compartment 6 by the freezer compartment fan 12. A freezer compartment return port 22 is provided at the lower part of the freezer compartment 6 communicating with the ice making chamber 4. Further, an introduction ventilation path 15 that branches from the cold air passage 31 and guides the cold air to the temperature switching chamber 3 is provided.

  The upper part of the cold air passage 31 communicates with the cold air passage 32 via the refrigerator compartment damper 20. When the refrigerator compartment damper 20 is opened and the freezer compartment fan 12 is driven, cold air is supplied to the refrigerator compartment 2 and the chilled compartment 21. The refrigerator compartment damper 20 is arranged behind the vertical heat insulation wall 36 so as to overlap the vertical heat insulation wall 36 in front projection.

  In order to secure a large volume of the temperature switching chamber 3, the vertical heat insulating wall 36 that separates the temperature switching chamber 3 and the ice making chamber 4 is arranged to be biased to the right side in the drawing. The cold air passage 32 branches from the outlet side of the cold room damper 20 to the left and right so that the cold air is discharged from the entire cold room 2. At this time, if the refrigerator compartment damper 20 is arranged in the center in the left-right direction, the cold air can be evenly circulated through the cold air passage 32 branched to the left and right.

  However, if the front part 31 a of the cold air passage 31 and the baffle of the refrigerator compartment damper 20 are provided behind the temperature switching chamber 3, heat is released from the temperature switching chamber 3 to the cold air in the cold air passage 31. If cold air flowing through the cold air passage 31 is generated at, for example, -23 ° C and the temperature switching chamber 3 is controlled to a temperature higher than the cold air (for example, 3 ° C, 8 ° C, or 50 ° C), heat loss increases. . For this reason, the baffle of the refrigerator compartment damper 20 and the front part 31a (see FIG. 3) of the cold air passage 31 are provided behind the vertical heat insulation wall 36, and release of heat from the temperature switching chamber 3 to the cold air is prevented. Accordingly, the refrigerator compartment damper 20 can be brought closer to the center in the left-right direction, and the cooling efficiency can be further improved.

  A refrigerator compartment outlet 2 a is opened at the lower back of the refrigerator compartment 2, and a vegetable compartment inlet (not shown) is provided in the vegetable compartment 5. The refrigerator compartment outlet 2 a and the vegetable compartment inlet are connected by a connection path 34 that passes through the back surface of the temperature switching chamber 3, and the refrigerator compartment 2 and the vegetable compartment 5 communicate with each other. A return ventilation path 46 (see FIG. 3) communicating with the cold air passage 31 is provided at the upper back of the vegetable compartment 5.

  A temperature switching chamber blower 18 and a heater 16 are disposed on the upper portion of the temperature switching chamber 3. A temperature switching chamber discharge damper 37 is provided at the lower right of the temperature switching chamber 3. The temperature switching chamber discharge damper 37 is disposed on the introduction ventilation path 15, and the temperature switching chamber blower 18 is disposed on the introduction ventilation path 15. When the temperature switching chamber discharge damper 37 is opened and the temperature switching chamber blower 18 is driven, cold air flows from the cooler 11 into the temperature switching chamber 3 through the introduction ventilation path 15. The amount of air flowing into the temperature switching chamber 3 from the introduction ventilation path 15 is adjusted by the opening / closing amount of the temperature switching chamber discharge damper 37.

  A temperature switching chamber return damper 38 is provided at the lower left portion of the temperature switching chamber 3. The temperature switching chamber return damper 38 opens and closes the return ventilation path 17 extending downward, and the air in the temperature switching chamber 3 returns to the cool air passage 31 via the return ventilation path 17.

  The cooler 11 is formed by meandering refrigerant pipes 11a through which refrigerant flows, and left and right ends of the refrigerant pipes 11a are supported by end plates 11b. A large number of fins (not shown) for heat dissipation are provided in contact with the refrigerant pipe 11a.

  The air flowing through the return air passage 17 is returned to the cooler 11 from an outlet 17 a provided in the middle of the cooler 11 in the vertical direction. The cold air flowing out from the freezer compartment 6 through the freezer return port 22 returns to the lower part of the cooler 11, and the cold air flowing out from the vegetable compartment 5 and passing through the return passage 46 returns to the lower part of the cooler 11. Therefore, the cold air flowing out from each storage chamber is returned to the cooler 11 in a dispersed manner. For this reason, the frost by the cold air containing the water | moisture content which circulated through each store room and returned does not generate | occur | produce intensively, but disperse | distributes and generate | occur | produces in the whole cooler 11. Thereby, clogging of the cold air flow due to frost is prevented, and a decrease in cooling performance of the cooler 11 can be prevented.

  In addition, the cold air that has flowed through the temperature switching chamber 3 with a small volume is cooled at the upper part of the cooler 11, and the cold air that has flowed through the large-sized refrigerating chamber 3, the vegetable room 5, and the freezer room 6 Cooled by. Therefore, the cold air flowing out from the temperature switching chamber 3 is not heat exchanged with the cooler 11 more than necessary, and the heat exchange efficiency of the cooler 11 can be improved.

  Further, the cold air flowing out from the freezer compartment 6 through the freezer return port 22 is guided between the end plates 11b on both sides. The cold air flowing out from the vegetable compartment 5 is guided to the entire left and right direction inside and outside the end plates 11b on both sides of the cooler 11 via a return ventilation path 46 (see FIG. 3).

  Thereby, the heat exchange area of the cold air flowing out from the vegetable compartment 5 becomes larger than the heat exchange area of the cold air flowing out from the freezer compartment 6. Therefore, the low temperature cold air returning from the freezer compartment 6 is not cooled more than necessary, and the high temperature cold air returning from the vegetable compartment 5 is cooled by the entire cooler 11 so that the heat exchange efficiency of the cooler 11 can be further improved.

  Since the temperature switching chamber 3 may be maintained at the freezing temperature, the end plate 11b is provided with a notch (not shown) at a position facing the outlet 17a of the return ventilation path 17. Thereby, the cold air that has flowed out of the temperature switching chamber 3 can be guided between the end plates 11b on both sides.

  An accumulator 45 is connected to the upper part of the refrigerant pipe 11a. The accumulator 45 is disposed at the end of the ice making chamber 4 away from the temperature switching chamber 3. Thereby, even if the temperature switching chamber discharge damper 37 is disposed below the temperature switching chamber 3, it does not interfere with the accumulator 45. As a result, it is possible to avoid the interference between the refrigerator compartment damper 20 and the temperature switching chamber discharge damper 37 and arrange the refrigerator compartment damper 20 behind the vertical heat insulating wall 36.

  FIG. 5 shows a side sectional view of the temperature switching chamber 3. The upper and lower surfaces of the temperature switching chamber 3 are insulated from the refrigerator compartment 2 and the freezer compartment 6 by heat insulation walls 7 and 35. The front surface of the temperature switching chamber 3 can be opened and closed by a pivotable door 9. The back surface of the temperature switching chamber 3 is covered with a back plate 40. An air inlet 40 a through which air flows into the temperature switching chamber 3 is provided at the upper part of the back plate 40. An air outlet 40 b through which air flows out from the temperature switching chamber 3 is provided at the lower part of the back plate 40.

  The temperature switching chamber blower 18 is provided facing the air inlet 40a, and the heater 16 is disposed between the temperature switching chamber blower 18 and the air inlet 40a. The heater 16 is formed of a heat radiation type glass tube heater, and raises the temperature of the temperature switching chamber 3 by radiant heat released through the back plate 40. The temperature switching chamber blower 18 is disposed so as to blow toward the surface of the heater 16. Thereby, the surface temperature of the heater 16 can be lowered and safety can be improved. A temperature sensor 24 that detects abnormal heating by the heater 16 is provided above the heater 16. The air outlet 40b is provided with a temperature sensor (not shown) for detecting the temperature in the temperature switching chamber 3.

  A panel heater 44 that uniformly dissipates heat from the entire surface is provided below the temperature switching chamber 3. The panel heater 44 is disposed between the heat insulating wall 35 via a gap d, and uniformly heats from the upper and lower surfaces to raise the temperature in the temperature switching chamber 3. Heat dissipation can be improved by dissipating heat from both sides. The gap d is preferably 10 to 20 mm. Thereby, while ensuring the volume in the temperature switching chamber 3, the raise of the surface temperature of the heat insulation wall 35 can be suppressed, and the heat leak to the freezer compartment 6 can be prevented.

  The storage case 43 in the temperature switching chamber 3 is made of metal and placed on the panel heater 44. Thereby, the stored item in the storage case 43 can be efficiently heated. The panel heater 44 may be pivotally supported at the rear end. Thereby, the front part of the panel heater 44 can be lifted and the lower part of the panel heater 44 can be easily cleaned.

  A temperature switching chamber return damper 38 is disposed behind the air outlet 40b. The temperature switching chamber return damper 38 has an opening 38a that opens downward and an opening 38b that opens backward, and has a baffle 38c that opens one and closes the other by rotation. The opening 38 a faces the return ventilation path 17 extending downward, and the opening 38 b communicates with the intake side of the temperature switching chamber blower 18 through the communication path 30.

  When the opening 38b of the temperature switching chamber return damper 38 is opened, the air flowing out from the air outlet 40b is guided to the intake side of the temperature switching chamber blower 18, and the return ventilation path 17 is closed. Therefore, when the opening 38 a and the temperature switching chamber discharge damper 37 (see FIG. 4) are closed, the air in the temperature switching chamber 3 can be circulated by driving the temperature switching chamber blower 18. In the following description, the case where the opening 38a is opened and the opening 38b is closed is referred to as a state where the temperature switching chamber return damper 38 is opened, and the case where the opening 38a is closed and the opening 38b is opened. The switching chamber return damper 38 is in a closed state.

  FIG. 9 is a cold air circuit diagram showing the flow of cold air in the refrigerator 1. The freezer compartment 6, the refrigerator compartment 2, and the temperature switching chamber 3 are each arranged in parallel. The ice making room 4 is arranged in series with the freezer room 6, and the vegetable room 5 is arranged in series with the refrigerator room 2. The cold air generated by the cooler 11 is sent to the ice making room 4 and the freezing room 6 by driving the freezing room blower 12. The cold air sent to the ice making room 4 flows through the ice making room 4 and the freezing room 6, flows out from the freezing room return port 22, and returns to the cooler 11. As a result, the ice making chamber 4 and the freezing chamber 6 are cooled.

  The cold air branched on the exhaust side of the freezer compartment fan 12 is sent to the refrigerating compartment 2 and the chilled compartment 21 through the refrigerating compartment damper 20 by driving the refrigerating compartment blower 23. The cold air that has flowed through the refrigerator compartment 2 and the chilled compartment 21 and exchanged heat with the stored material flows into the vegetable compartment 5 through the connection path 34. The cold air flowing into the vegetable compartment 5 circulates in the vegetable compartment 5 and returns to the cooler 11 through the return ventilation path 46. Thereby, the inside of the refrigerator compartment 2 and the vegetable compartment 5 is cooled, and when it becomes preset temperature, the refrigerator compartment damper 20 will be closed.

  Further, the cold air branched on the exhaust side of the freezer compartment fan 12 flows into the temperature switching chamber 3 through the temperature switching chamber discharge damper 37 by driving the temperature switching chamber blower 18. The cold air that has flowed into the temperature switching chamber 3 flows through the temperature switching chamber 3, flows out of the temperature switching chamber return damper 38, and returns to the cooler 11 through the return ventilation path 17. 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 a user's operation. The operation modes of the temperature switching chamber 3 are wine (8 ° C.), refrigeration (3 ° C.), chilled (0 ° C.), soft freezing (−8 ° C.), and freezing (−15 ° C.) depending on the temperature zone. Provided.

  Thus, the user can store the refrigerated product at a desired temperature by refrigeration or refrigeration. The room temperature can be switched by varying the amount of opening of the temperature switching chamber discharge damper 37. For example, the heater 16 or the panel heater 44 may be energized to switch the temperature from the frozen room temperature to the refrigerated room temperature. Thereby, it can switch to desired room temperature rapidly.

  Further, by energizing the heater 16 and the panel heater 44, the room temperature of the temperature switching chamber 3 can be switched from the low temperature side where the stored items are cooled and stored to the high temperature side higher than the normal temperature. Thereby, temporary heat insulation, warm cooking, etc. of the cooked heated food can be performed.

  When the temperature switching chamber 3 is switched to the high temperature side, the opening 38a of the temperature switching chamber return damper 38 and the temperature switching chamber discharge damper 37 are closed. Then, the temperature switching chamber blower 18 and the heater 16 are driven to shift to a temperature raising period in which the temperature in the temperature switching chamber 3 is raised.

  When the temperature switching chamber 3 is heated to a predetermined temperature, the temperature switching chamber blower 18 and the heater 16 are stopped, and the panel heater 44 is driven. Thereby, it transfers to the heat retention period which maintains the temperature switching chamber 3 at predetermined temperature, and heats a stored thing. During the heat retention period, the panel heater 44 is turned on and off in the vicinity of the set temperature to maintain the set temperature.

  By driving the heater 16 and the panel heater 44 having a large capacity during the temperature raising period, the temperature can be quickly raised to a desired room temperature. Further, since the temperature switching chamber blower 18 and the heater 16 are stopped and the panel heater 44 having a small capacity is driven during the heat retention period, the power can be saved and the room can be easily maintained at a uniform temperature. Moreover, since the temperature switching chamber blower 18 is stopped, the hot air is not directly applied to the stored item, and drying of the stored item can be prevented or reduced.

  Since the growth temperature of the main food poisoning bacteria is 30 ° C. to 45 ° C., the indoor temperature on the high temperature side is preferably set to 50 ° C. or more in consideration of the tolerance of the heater capacity, the temperature distribution in the temperature switching chamber 3, and the like. Thereby, propagation of food poisoning 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 addition, 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 desirable to set the indoor temperature on the high temperature side to 75 ° C to 80 ° C.

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.

  According to the present embodiment, since the refrigerator compartment 2, the temperature switching chamber 3, the freezer compartment 6, and the vegetable compartment 5 are arranged in this order from the top, the width of the freezer compartment 6 and the vegetable compartment 5 is widened, and the convenience of the refrigerator 1 is improved. To do. In addition, since the temperature switching chamber 3 and the freezer compartment 6 are adjacent to each other, the cool air path from the cooler 11 provided close to the freezer compartment 6 to the temperature switching chamber 3 is shortened. For this reason, the temperature rise of the cold air supplied to the temperature switching chamber 3 maintained at the freezing temperature can be prevented, and the cooling efficiency can be improved.

  Moreover, the convenience of the refrigerator 1 improves by arrange | positioning the refrigerator compartment 2 with a high usage frequency in the uppermost stage. In addition, since the vegetable compartment 5 is disposed below the refrigerator compartment 2, the cold air in the refrigerator compartment 2 can be easily guided to the vegetable compartment 5 by its own weight, and a reduction in blowing efficiency can be prevented. Furthermore, since the temperature switching chamber 3 is disposed above the freezer compartment 6 and the vegetable compartment 3, it is possible to easily put in and out a heavy and hot pan or the like while the user is standing. Therefore, the convenience of the refrigerator 1 can be further improved, and the risk of turning over the pan or the like can be reduced, thereby improving safety.

  Further, since the vertical heat insulating wall 36 that separates the temperature switching chamber 3 and the ice making chamber 4 and the refrigerator compartment damper 20 are arranged so as to overlap in front projection, the depth direction of the ice making chamber 4 and the temperature switching chamber 3 can be widened. it can. Therefore, even if the lateral width of the ice making chamber 4 is narrowed, the necessary volume can be secured and the temperature switching chamber 3 can be secured widely, and the convenience of the refrigerator 1 is improved.

  Further, since the temperature switching chamber 3 can be changed to a temperature higher than room temperature, the dead space behind the thick vertical heat insulating wall 36 can be reduced and the volumetric efficiency can be improved.

  In addition, since the refrigerator compartment fan 23 is arranged at a position where the axial direction of the refrigerator compartment fan 23 is oriented in the vertical direction and overlaps with the horizontal heat insulation wall 7 surrounding the refrigerator compartment 2 in front projection, the refrigerator compartment 1 having a high use frequency is used. A large internal volume can be secured. Therefore, the convenience of the refrigerator 1 is further improved. In the case where another storage room is provided between the freezer compartment 6 (including the ice making room 4 communicating with the freezer compartment 6) and the refrigerator compartment 2, the refrigerator compartment fan 23 is placed horizontally around the freezer compartment 6. You may arrange | position in the position which overlaps in a heat insulation wall and front projection.

  Further, since the volume of the temperature switching chamber 3 is made larger than the volume of the ice making chamber 4, it is possible to ensure a necessary amount of ice storage and to keep more stored items warm or cold. Therefore, the convenience of the refrigerator 1 can be further improved.

  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 freezer compartment fan 12 is stopped when the temperature switching chamber 3 is switched from the high temperature side to the low temperature side, a passage opening / closing mechanism (for example, a damper) is provided so that the freezer compartment return port 22 is closed. Also good. Thereby, it is possible to prevent the hot air from flowing backward from the freezer return port 22 into the freezer compartment 6 by driving the temperature switching chamber blower 18.

  According to the present invention, it can be used for a refrigerator having a temperature switching chamber.

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 Front sectional drawing 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 The side view which shows the machine room of the refrigerator of embodiment of this invention The rear view which shows the machine room of the refrigerator of embodiment of this invention The top view which shows the machine room 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

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Refrigerator 2 Refrigeration room 3 Temperature switching room 4 Ice making room 5 Vegetable room 6 Freezer room 7, 8, 35 Insulation wall 9 Door 11 Cooler 11a Refrigerant pipe 11b End plate 12 Freezer room blower 15 Inlet ventilation path 16 Heater 17 Return ventilation path DESCRIPTION OF SYMBOLS 18 Temperature switching room blower 20 Refrigeration room damper 22 Freezing room return port 23 Refrigeration room blower 24 Temperature sensor 36 Vertical heat insulation wall 37 Temperature switching room discharge damper 38 Temperature switching room return damper 44 Panel heater 45 Accumulator 50 Machine room 50a Back cover 51 Electrical equipment Section 52 Electrical cover 53 Control board 54 Lead wire holding section 57 Compressor 60 Condenser fan

Claims (5)

The cold air generated by the cooler flows through the first cold air passage and is sent to the freezer compartment,
The second cold air passage communicating with the first cold air passage through the cold room damper is circulated and sent to the cold room.
A temperature switching chamber capable of switching to a plurality of indoor temperatures including a freezing temperature or a temperature higher than the temperature of the cold air; and
An ice making chamber which is arranged on the side of the temperature switching chamber through a vertical heat insulating wall made of a heat insulating material and which makes ice in communication with the freezing chamber;
With
While disposing the freezer compartment below the refrigerator compartment, arranging the temperature switching chamber and the ice making chamber between the refrigerator compartment and the freezer compartment,
In front projection, a baffle of the refrigerator compartment damper and a part of the front portion of the first cold air passage leading to the baffle are provided behind the vertical heat insulating wall,
While bringing the baffle of the refrigerator compartment damper closer to the center in the left-right direction,
A refrigerator, wherein a baffle of the refrigerator compartment damper and a part of a front part of the first cold air passage are arranged at a position overlapping the vertical heat insulation wall, avoiding the back of the temperature switching chamber.   A heating device that heats the temperature switching chamber; a low temperature side that performs cold storage including freezing storage of stored items by cooling by the cooler and heating by the heating device; and a high temperature that is higher than normal temperature The refrigerator according to claim 1, wherein the refrigerator can be switched to the side. A temperature switching chamber discharge damper for taking in the cool air generated by the cooler into the temperature switching chamber;
While disposing the refrigerator compartment damper on top of the vertical insulation wall,
The refrigerator according to claim 1 or 2, wherein the temperature switching chamber discharge damper is disposed in a lower part behind the temperature switching chamber.   The cooler includes a meandering refrigerant pipe and an accumulator connected to an upper end of the refrigerant pipe, and is installed behind the freezer compartment, and the accumulator is disposed at an end portion on the ice making chamber side. The refrigerator according to claim 3.   The refrigerator according to any one of claims 1 to 4, wherein a volume of the temperature switching chamber is made larger than a volume of the ice making chamber.

Images