JP2017227346A - Cold storage - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cold storage with an improved volume efficiency capable of preventing the dew condensation.SOLUTION: A cold storage 1 comprises: a refrigeration room 3 for storing stored items frozen; a cold room 2 which is adjacent to the refrigeration room 3 via an adiabatic wall 7 for reserving stored items cold; a chiller 23 for generating cool air; a cold air passage 21 disposed on the back face of the refrigeration room 3 for accommodating the chiller 23; a cold air passage 22 covered with a cover member 37 having an adiabatic material 38 on its internal surface which is disposed on the back face of the cold room 2 for communicating with the cold air passage 21; and a back face heater 80 disposed between the adiabatic material 38 at the end on the cold air inflow side of the cold air passage 22 and the cover member 37.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a refrigerator provided with a cold air passage in the back of a storage room for storing stored items in a refrigerator.

  A conventional refrigerator is disclosed in Patent Document 1. This refrigerator has a refrigerator compartment and a freezer compartment, which are adjacent to each other at upper and lower portions through heat insulating walls. In the lower part of the refrigerator compartment, there is provided an accessory storage room composed of an isolation room separated from the upper part by a partition plate. A storage container for storing eggs is arranged in the accessory storage room so that it can be pulled out. A wall heater is provided on the heat insulating wall at the bottom of the accessory storage chamber. The wall heater prevents overcooling of the accessory storage chamber.

  A first cold air passage having an outlet opening facing the freezer compartment is disposed on the back of the freezer compartment. A cooler and a blower are arranged in the first cold air passage. Cold air is generated by the cooler, and cold air is sent out by the blower. A second cold air passage communicates with the upper portion of the first cold air passage via a cold air flow inlet. The second cold air passage is arranged at the back of the refrigerator compartment and opens a discharge port facing the refrigerator compartment. A heat insulating material is provided in front of the second cold air passage.

  In the refrigerator having the above configuration, when the blower is driven, the cold air generated by the cooler flows through the first cold air passage and is discharged into the freezer compartment. Thereby, the freezer compartment is cooled. A part of the cold air flowing through the first cold air passage flows into the second cold air passage through the cold air flow inlet and is discharged into the refrigerator compartment. Thereby, the refrigerator compartment is cooled.

JP 2008-304165 A (pages 6 to 8, FIGS. 3 and 5)

  However, according to the conventional refrigerator, there is a problem that condensation occurs at the end of the second cool air passage where the cool air flows from the first cool air passage on the cold air inflow side facing the refrigerator compartment. On the other hand, when the thickness of the heat insulating material in the second cold air passage is increased in order to prevent condensation, there arises a problem that the volumetric efficiency of the refrigerator compartment is lowered.

  An object of the present invention is to provide a refrigerator that has high volumetric efficiency and can prevent condensation.

In order to achieve the above object, the present invention provides:
A first storage room for freezing and storing stored items;
A second storage chamber for refrigerated storage of the stored items adjacent to the first storage chamber through an insulating wall;
A cooler that produces cold air;
A first cold air passage disposed on the back surface of the first storage chamber and housing the cooler;
A second cold air passage which is covered with a cover member provided with a heat insulating material on the inner surface and is arranged on the back surface of the second storage chamber and communicates with the first cold air passage;
A back heater disposed between the heat insulating material at the end of the second cold air passage on the cold air inflow side and the cover member;
It is characterized by having.

  According to the present invention, in the refrigerator configured as described above, the second cold air passage projects from the back surface of the second storage chamber, and the isolation chamber is disposed in the second storage chamber to the side of the second cold air passage. It is preferable that the rear heater has an extending portion that extends on a side wall of the isolation chamber or in the isolation chamber.

  In the refrigerator having the above-described configuration, the isolation chamber is preferably a wiring storage chamber that stores wiring connected to the back heater.

  According to the present invention, in the refrigerator configured as described above, a damper unit is provided that opens the cold air flow inlet facing the first cold air passage to store the damper and has the wiring storage chamber, and the rear heater includes the damper unit. It is preferable to be arranged in

  According to the present invention, in the refrigerator configured as described above, the ice making tray disposed in the first storage chamber, a water supply tank disposed in the second storage chamber, and water in the water supply tank are supplied to the ice making tank via a water supply pipe. It is preferable that a water supply pump for supplying to the dish is provided, and the water supply pump is disposed in the isolation chamber.

  Moreover, this invention is a refrigerator of the said structure, The pipe heater which heats the said water supply pipe is provided, The 1st connector by which the said back heater is connected to the electric power supply side, The 2nd connector connected to the said pipe heater side, Preferably it has.

  Moreover, this invention is a refrigerator of the said structure. WHEREIN: The wall surface heater distribute | arranged to the said heat insulation wall is provided, The 1st connector with which the said back heater is connected to the electric power supply side, and the 2nd connector connected to the said wall surface heater side And preferably.

  According to the present invention, the back heater is provided between the heat insulating material at the end of the second cool air passage disposed on the back surface of the second storage chamber on the cold air inflow side and the cover member. Thereby, while reducing the thickness of a heat insulating material and improving volumetric efficiency, the condensation on the back surface of a refrigerator compartment can be prevented.

The front view which shows the refrigerator of 1st Embodiment of this invention. Front sectional drawing which shows the refrigerator of 1st Embodiment of this invention. AA sectional view of FIG. Top surface sectional drawing which shows the refrigerator compartment of the refrigerator of 1st Embodiment of this invention The perspective view which looked at the damper unit of the refrigerator of 1st Embodiment of this invention from the front side The perspective view which looked at the damper unit of the refrigerator of 1st Embodiment of this invention from the back side The front view which shows the damper unit of the refrigerator of 1st Embodiment of this invention. BB sectional view of FIG. The front view which shows the back heater of the refrigerator of 1st Embodiment of this invention. The side view which shows the ice making apparatus inside the refrigerator of 1st Embodiment of this invention. The front view which shows the damper unit of the refrigerator of 2nd Embodiment of this invention. Sectional drawing which looked at the cross section which passes on the 1st cold air path and 2nd cold air path of the refrigerator of 3rd Embodiment of this invention from the right side surface side.

<First Embodiment>
Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a front view showing the refrigerator of the first embodiment. The refrigerator 1 is provided with a plurality of storage rooms inside the heat insulating box 1a. In the upper part of the refrigerator 1, a refrigerator compartment 2 (second storage compartment) that stores the stored items in a refrigerator and is opened and closed by doors 2 a and 2 b is arranged. A plurality of door pockets 2e are provided on the inner surfaces of the doors 2a and 2b.

  A tank chamber 12, an accessory storage chamber 13, and a chilled chamber 14, which are separated from the upper portion by a partition plate 15, are provided side by side at the lower portion of the refrigerator compartment 2. The tank chamber 12 stores a water supply tank 10 for ice making. A storage container 13a that can be pulled out is arranged in the accessory storage chamber 13, and the storage container 13a stores small stored items such as eggs. The chilled chamber 14 is maintained at a lower temperature than the upper part of the refrigerator compartment 2.

  Below the refrigerating room 2, a freezing room 3 (first storage room) and an ice making room 5 (first storage room) are arranged adjacent to the refrigerating room 2 via a heat insulating wall 7. The ice making chamber 5 is opened and closed by a door 5a, and water is supplied from a water supply tank 10 to make ice and store ice as will be described in detail later. The freezer compartment 3 stores stored items in a frozen state, and has an upper chamber 3c opened and closed by a door 3a and a lower chamber 3d opened and closed by a door 3b. The upper chamber 3c and the ice making chamber 5 are arranged side by side with a partition wall 11 therebetween. The lower chamber 3d is partitioned from the upper chamber 3c and the ice making chamber 5 by a partition wall 8 (see FIGS. 2 and 3) provided at the front, and communicates with the upper chamber 3c and the ice making chamber 5 behind the partition wall 8.

  Below the freezer compartment 3, the vegetable compartment 4 is arranged via the heat insulation wall 9 (refer FIG. 2, FIG. 3). The vegetable compartment 4 is opened and closed by a door 4a, and is maintained at a temperature higher than that of the refrigerator compartment 1 and suitable for refrigerated storage of vegetables and fruits.

  FIG. 2 shows a front sectional view of the refrigerator 1. FIG. 3 shows a cross-sectional view taken along the line AA of FIG. A cold air passage 21 (first cold air passage) is disposed on the back of the freezer compartment 3 and the ice making compartment 5. A blower fan 24 is disposed in the upper part of the cool air passage 21. In the lower part of the cool air passage 21, a cooler chamber 21a that is widened to the left and right is provided, and the cooler 23 is accommodated in the cooler chamber 21a. The cooler 23 is connected to a compressor 29 (see FIG. 3) in the machine room 28 and is arranged on the low temperature side of the refrigeration cycle, and generates heat by exchanging heat with the air flowing through the cool air passage 21.

  A discharge port 3e that faces the freezer compartment 3 is opened in the upper part of the cooler chamber 21a, and a return port 3f that faces the cooler 23 and returns cool air to the cool air passage 21 is opened in the lower part.

  A cold air passage 22 (second cold air passage) is provided at the center of the rear side of the refrigerator compartment 2 in the left-right direction so as to protrude on the rear surface of the refrigerator compartment 2 and extend vertically. The cold air passage 22 is covered with a cover member 37 having an inner surface provided with a heat insulating material 38 and communicates with the cold air passage 21. The cover member 37 is made of, for example, ABS resin, and the heat insulating material 38 is made of, for example, polystyrene foam. The end of the cold air passage 22 on the cold air inflow side is formed by the damper unit 30, and the cold air passage 22 communicates with the cold air passage 21 via the cold air inlet 35 (see FIG. 3) of the damper unit 30. A damper 25 is disposed at the cold air flow inlet 35. At both ends of the cover member 37 above the damper unit 30, a plurality of discharge ports 22 a facing the inside of the refrigerator compartment 2 are opened side by side.

  A ceiling duct 60 communicating with the cold air passage 22 is provided extending in the front-rear direction at the center in the left-right direction of the ceiling surface of the refrigerator compartment 2. A ceiling discharge port 60 a for discharging cool air is opened in front of the ceiling duct 60.

  The lower part (upstream part) of the cool air passage 22 branches downstream of the damper unit 30, and a discharge port 14 a for discharging cool air to the chilled chamber 14 is provided. An outlet 2d through which the cool air in the refrigerator compartment 2 flows out opens at one end of the back surface of the chilled chamber 14.

  On the upper surface of the vegetable compartment 4, an inflow port 4b opens at one end in the left-right direction. A connecting passage 26 that connects the outlet 2d and the inlet 4b is provided on the side of the cold air passage 21. In addition, a return port (not shown) that opens at the lower end of the cold air passage 21 is formed at the other end of the upper surface of the vegetable chamber 4 in the left-right direction.

  FIG. 4 is a top sectional view showing the refrigerator compartment 2 and shows a section through the damper unit 30. A damper unit 30 is provided at the lower back of the refrigerator compartment 2. The damper unit 30 is screwed to the heat insulating box 1a with screws (not shown) or the like. The damper unit 30 is disposed on the back surface of the tank chamber 12 and the accessory storage chamber 13 and includes a wiring storage chamber 40 and a pump chamber 70.

  A cold air flow inlet 35 is opened at the lower end of the damper unit 30, and the cold air flow inlet 35 is opened and closed by the damper 25. The damper 25 rotates in the vertical direction to open and close the cold air flow inlet 35. Since an installation space and a rotation space for the damper 25 are required in the damper unit 30, the front end of the damper unit 30 is in front of the cool air passage 22 above the damper unit 30 as shown in FIGS. 3 and 4. Protruding. A rear heater 80 (see FIG. 5) is disposed between the cover member 37 and the heat insulating material 38 of the damper unit 30.

  A wiring storage chamber 40 is adjacent to the left side of the cold air passage 22. The wiring storage chamber 40 is composed of an isolation chamber separated from the refrigerator compartment 2, and stores wirings 83 and 84 (see FIG. 9) connected to the rear heater 80.

  An opening 41 (see FIG. 5) on the front surface of the wiring storage chamber 40 can be opened and closed by a lid 42. Further, a notch 43 is provided on the bottom surface of the wiring storage chamber 40. The wirings 83 and 84 can be inserted into the wiring storage chamber 40 through the notch 43.

  A pump chamber 70 is adjacent to the left side of the wiring storage chamber 40. The pump chamber 70 is composed of an isolation chamber separated from the refrigerating chamber 2 and houses the water supply pump 17 (see FIG. 10) of the ice making device 27 (see FIG. 10).

  The side wall of the wiring storage chamber 40 and the side wall of the pump chamber 70 are formed integrally with the cover member 37. Note that the side wall of the wiring storage chamber 40 and the side wall of the pump chamber 70 may be formed by a member different from the cover member 37.

  5 and 6 show perspective views of the damper unit 30 as viewed from the front side and the back side, respectively. FIG. 7 shows a front view of the damper unit 30. FIG. 8 shows a cross-sectional view taken along the line BB in FIG.

  On the back surface of the cover member 37, an aluminum foil 100 welded with a back heater 80 is attached with a double-sided adhesive tape (not shown) or the like. The heat insulating material 38 is attached to the back surface (inner surface) of the cover member 37 to which the back heater 80 is attached, for example, with a double-sided adhesive tape (not shown).

  A temperature sensor 39 made of a thermistor is disposed at the upper right end of the cover member 37 of the damper unit 30. The temperature sensor 39 detects the temperature in the refrigerator compartment 2, and the compressor 29 is driven and stopped, and the damper 25 is opened and closed based on the detection result of the temperature sensor 39.

  FIG. 9 shows a front view of the back heater 80. The back heater 80 is formed of a linear cord heater and includes a back surface portion 80a and an extending portion 80b. The back surface portion 80 a meanders and is welded onto the sheet-like aluminum foil 100, and is disposed between the cover member 37 and the heat insulating material 38 of the damper unit 30. Thereby, the heat of the back surface part 80a of the back surface heater 80 can transmit the aluminum foil 100, and the back surface of the refrigerator compartment 2 can be heated uniformly.

  The extending portion 80b extends leftward from the back surface portion 80a, and is disposed in the wiring storage chamber 40 as shown in FIG. 7 through the notch portion 43 (see FIG. 5). Thereby, the temperature of the wiring storage chamber 40 is raised by the extending portion 80b. The extended portion 80b may be attached to the side wall of the wiring storage chamber 40 with an adhesive tape or the like. Further, the extended portion 80 b may be welded to a sheet-like aluminum foil similar to the aluminum foil 100. Thereby, the inside of the wiring storage chamber 40 can be heated uniformly.

  A wiring 83 is connected to one end of the extended portion 80b through a connection terminal 85. Since the connection terminal 85 is not disposed between the heat insulating material 38 and the cover member 37, the thickness of the heat insulating material 38 is prevented from being reduced by the connection terminal 85 having a diameter larger than that of the rear heater 80. A first connector 81 is connected to one end of the wiring 83. The first connector 81 is connected to the power supply side. Further, the wiring 84 is led out from the first connector 81, and the second connector 82 is connected to one end of the wiring 84. The second connector 82 is connected to the pipe heater 18 (see FIG. 10) described later, and the rear heater 80 is connected in parallel with the pipe heater 18. Thereby, the back surface heater 80 can be easily retrofitted between the power supply side and the pipe heater 18. The back heater 80 and the pipe heater 18 may be connected in series.

  The refrigerator 1 also includes an ice making device 27. FIG. 10 is a side view showing the ice making device 27. The ice making device 27 includes a water supply tank 10, a water supply pipe 16, a water supply pump 17, a pipe heater 18, an ice tray 5 b, and an ice removing motor 19. The ice making tray 5 b and the ice removing motor 19 are arranged in the ice making chamber 5.

  Ice-making water is stored in the water supply tank 10, and the water supply tank 10 is detachably installed in the tank chamber 12. The water supply tank 10 can be taken in and out of the refrigerator compartment 2 by opening and closing the door 2a.

  The water supply pipe 16 is led out from the water supply tank 10 and is provided extending to the ice tray 5b. The water supply pump 17 is arranged in the pump chamber 70 in the path of the water supply pipe 16, pumps water from the water supply tank 10, and supplies it to the ice tray 5 b through the water supply pipe 16.

  The pipe heater 18 is provided in contact with the water supply pipe 16 and is energized at, for example, 3 W. Thereby, freezing of the water which distribute | circulates the inside of the water supply pipe 16 can be prevented. A pipe heater 18 may be provided around the water supply tank 10. Thereby, freezing of the water in the water supply tank 10 can be prevented.

  The ice tray 5b is supplied with water from the water supply tank 10 through the water supply pipe 16, and ice ice K is made in the ice making chamber 5 below the freezing point. The ice removal motor 19 has a motor shaft 19a connected to the ice tray 5b, rotates the ice tray 5b, and twists the ice tray 5b to perform ice removal.

  In the refrigerator 1 having the above-described configuration, the refrigeration cycle is operated by driving the compressor 29 (see FIG. 3), and the cooler 23 is maintained at a low temperature. The air flowing through the cool air passage 21 by driving the blower fan 24 exchanges heat with the cooler 23, and the cool air is discharged into the freezer compartment 3 from the discharge port 3 e. The cold air discharged from the discharge port 3e flows through the freezer compartment 3 and the ice making chamber 5 and returns to the cooler 23 through the return port 3f. Thereby, the freezing room 3 and the ice making room 5 are cooled.

  When the damper 25 is opened from the closed position indicated by the alternate long and short dash line 25 ′ (FIG. 8), a part of the cool air flowing through the cool air passage 21 flows into the cool air passage 22 through the cold air inlet 35. A part of the cool air flowing through the cool air passage 22 is discharged from the discharge port 14 a to the chilled chamber 14. Cold air immediately after heat exchange with the cooler 23 is sent to the chilled chamber 14 so that the chilled chamber 14 is maintained at a lower temperature than the upper portion of the refrigerator compartment 2.

  Cold air (arrow S, see FIG. 3) that circulates in the cold air passage 22 above the chilled chamber 14 is discharged into the refrigerator compartment 2 from the discharge port 22a. The cold air discharged from the discharge port 22a flows forward in the refrigerator compartment 2, and the inside of the refrigerator compartment 2 is cooled by the cold heat radiated from the cold air moving forward in the center in the left-right direction.

  The cold air flowing through the ceiling duct 60 discharges the cold air along the ceiling surface of the refrigerator compartment 2 through the ceiling discharge port 60a. The cool air discharged from the ceiling discharge port 60a flows in front of the refrigerator compartment 2 and flows down along the doors 2a and 2b to cool the inside of the door pocket 2e. And the cool air which cooled the refrigerator compartment 2 and the chilled chamber 14 flows out from the outflow port 2d.

  The cold air flowing out from the outlet 2d flows through the connecting passage 26 and flows into the vegetable compartment 4 through the inlet 4b. The cold air that has flowed into the vegetable compartment 4 flows through the vegetable compartment 4 and returns to the cooler 23 via a return port (not shown). Thereby, the vegetable compartment 4 is cooled.

  At this time, a back heater 80 (back surface portion 80 a) is disposed between the heat insulating material 38 and the cover member 37 of the damper unit 30 disposed at the end of the cool air passage 22 on the cold air inflow side. As a result, the surface of the damper unit 30 disposed on the cold air inflow side end of the cold air passage 22 where the temperature is lowered because the cold air flowing toward the cold chamber 2 first passes (the cover member 37). ) Is heated by the back heater 80. Therefore, condensation on the surface (cover member 37) of the damper unit 30 on the refrigerator compartment 2 side can be prevented. Thereby, the thickness of the heat insulating material 38 of the damper unit 30 is reduced, the amount of protrusion to the front of the damper unit 30 is reduced, and the dew condensation on the back surface of the refrigerator compartment 2 is prevented while improving the volumetric efficiency of the refrigerator compartment 2. be able to.

  In addition, the extending portion 80 b is disposed in the wiring storage chamber 40. Thereby, the temperature of the wiring storage chamber 40 adjacent to the cool air passage 22 is raised, and the dew condensation and freezing of the wirings 83 and 84 in the wiring storage chamber 40 can be prevented.

  Further, the pipe heater 18 is also driven when the rear heater 80 is driven. Thereby, freezing of the water which distribute | circulates the inside of the water supply pipe 16 of the ice making apparatus 27 can be prevented.

  According to the present embodiment, the back heater 80 is disposed between the heat insulating material 38 and the cover member 37 at the end of the cold air passage 22 (second cold air passage) on the cold air inflow side. Thereby, the back surface of the refrigerator compartment 2 (second storage chamber) in the vicinity of the cold air inflow side end of the cold air passage 22 is heated by the back heater 80. Therefore, the thickness of the heat insulating material 38 can be reduced to improve the volumetric efficiency of the refrigerator compartment 2, and condensation on the back surface of the refrigerator compartment 2 can be prevented.

  In addition, a wiring storage chamber 40 (isolation chamber) disposed on the side of the cold air passage 22 is provided in the refrigerating chamber 2, and the back heater 80 has an extending portion 80 b that extends into the wiring storage chamber 40. Thereby, the wiring storage chamber 40 is heated by the extension part 80b. Therefore, dew condensation and freezing of the wiring 83 and 84 in the wiring storage chamber 40 can be prevented.

  In addition, the cold air inlet 35 facing the cold air passage 21 is opened to store the damper 25 and the damper unit 30 having the wiring storage chamber 40 is provided, and the rear heater 80 is arranged in the damper unit 30. Thereby, the wiring 83 and 84 of the back heater 80 can be easily accommodated in the wiring storage chamber 40, and the back heater 80 can be easily attached.

  Further, the rear heater 80 has a first connector 81 connected to the power supply side, and a second connector 82 connected to the pipe heater 18 side. Thereby, the back heater 80 can be retrofitted easily.

Second Embodiment
Next, a second embodiment of the present invention will be described. FIG. 11 shows a front view of the damper unit 30 of the second embodiment. For convenience of explanation, the same reference numerals are assigned to the same parts as those in the first embodiment shown in FIGS. In the second embodiment, the arrangement of the extended portion 80b of the back heater 80 is different from that of the first embodiment. Other parts are the same as those in the first embodiment.

  An insertion hole (not shown) opens in the side wall that partitions the wiring storage chamber 40 and the pump chamber 70. The extended portion 80b inserted into the wiring storage chamber 40 through the notch 43 is drawn out into the pump chamber 70 through the insertion hole. Thereby, the extending part 80b is arranged in the pump chamber 70 (isolation chamber). Freezing of the feed water pump 17 can be prevented by the heat of the extended portion 80b. The extended portion 80b may be attached to the side wall of the pump chamber 70 with an adhesive tape or the like.

  In this embodiment, the same effect as that of the first embodiment can be obtained, and the extending portion 80b of the back heater 80 is arranged in the pump chamber 70 (isolation chamber). Thereby, the feed water pump 17 is heated and freezing of the feed water pump 17 is prevented.

<Third Embodiment>
Next, a third embodiment of the present invention will be described. FIG. 12: has shown sectional drawing which looked at the cross section which passes on the cold air | gas channel | paths 21 and 22 of the refrigerator 1 of 3rd Embodiment from the right side surface side. For convenience of explanation, the same reference numerals are assigned to the same parts as those in the first embodiment shown in FIGS. The third embodiment is different from the first embodiment in that a wall surface heater 90 is provided on the heat insulating wall 7. Other parts are the same as those in the first embodiment.

  A thin plate-shaped wall heater 90 is embedded in the heat insulating wall 7 below the accessory storage chamber 13. The wall heater 90 and the pipe heater 18 are connected in parallel. The first connector 81 (see FIG. 9) of the rear heater 80 is connected to the power supply side, and the second connector 82 (see FIG. 9) is connected to the wall heater 90 side.

  When the rear heater 80 is driven, the wall heater 90 is also driven. Thereby, overcooling of small stored items such as eggs in the storage container 13a of the accessory storage chamber 13 can be prevented. Further, the inside of the storage container 13a is heated from the back and the bottom by the back heater 80 and the wall heater 90, respectively. Thereby, the temperature distribution in the storage container 13a can be made uniform.

  In this embodiment, the same effect as that of the first embodiment can be obtained. Moreover, since the wall surface heater 90 arrange | positioned at the heat insulation wall 7 is provided, overcooling of small stored items, such as an egg in the accessory storage chamber 13, can be prevented. At this time, the rear heater 80 has a first connector 81 connected to the power supply side and a second connector 82 connected to the wall surface heater 90 side. Thereby, the back heater 80 can be easily attached or detached, and it can respond easily to various product developments, such as the presence or absence of the accessory storage chamber 13.

  Further, the inside of the accessory storage chamber 13 is heated from behind and below by a back heater 80 and a wall heater 90, respectively. Thereby, the temperature distribution in the accessory storage chamber 13 can be made uniform.

  The wall heater 90 may be embedded in the heat insulating wall 7 below the tank chamber 12. Thereby, freezing of the water supply tank 10 can be prevented.

  In the present embodiment, the extended portion 80 b of the back heater 80 may be disposed on the side wall of the pump chamber 70 or in the pump chamber 70 as in the second embodiment.

  Moreover, in 1st Embodiment-3rd Embodiment, although the refrigerator compartment 2 and the freezer compartment 3 are distribute | arranged to the upper part and the lower part of the refrigerator 1, respectively, it replaces with this and the freezer compartment to the upper part and the lower part of the refrigerator 1, respectively. 3 and the refrigerator compartment 2 may be arranged.

  ADVANTAGE OF THE INVENTION According to this invention, it can utilize for the refrigerator which provided the cold air | gas channel | path in the back surface of the store room which preserve | saves refrigerated goods.

1 Refrigerator 2 Refrigerated room (second storage room)
2d Outlet 3 Freezer room (first storage room)
3e Discharge port 3f Return port 4 Vegetable room 4b Inlet 5 Ice making room 5b Ice making plate 5c Ice storage container 7, 9 Heat insulation wall 10 Water supply tank 11 Partition wall 12 Tank room 13 Small storage room 14 Chilled room 15 Partition plate 16 Water supply pipe 17 Water supply Pump 18 Pipe heater 19 Deicing motor 21 Cold air passage (first cold air passage)
22 Cold air passage (second cold air passage)
22a discharge port 23 cooler 24 blower fan 25 damper 26 connecting passage 27 ice making device 28 machine room 29 compressor 30 damper unit 35 cold air inlet 37 cover member 38 heat insulating material 39 temperature sensor 40 wiring storage room 41 opening 42 lid part 43 Notch 60 Ceiling duct 60a Ceiling outlet 70 Pump chamber 80 Rear heater 80a Back surface 80b Extension part 81 First connector 82 Second connector 83, 84 Wiring 90 Wall heater

Claims (7)

A first storage room for freezing and storing stored items;
A second storage chamber for refrigerated storage of the stored items adjacent to the first storage chamber through an insulating wall;
A cooler that produces cold air;
A first cold air passage disposed on the back surface of the first storage chamber and housing the cooler;
A second cold air passage which is covered with a cover member provided with a heat insulating material on the inner surface and is arranged on the back surface of the second storage chamber and communicates with the first cold air passage;
A back heater disposed between the heat insulating material at the end of the second cold air passage on the cold air inflow side and the cover member;
A refrigerator characterized by comprising. The second cold air passage projects above the back surface of the second storage chamber, and an isolation chamber is provided in the second storage chamber and is disposed to the side of the second cold air passage.
The refrigerator according to claim 1, wherein the rear heater has an extending portion that extends on a side wall of the isolation chamber or in the isolation chamber.   The refrigerator according to claim 2, wherein the isolation chamber is a wiring storage chamber that stores wiring connected to the rear heater.   The apparatus includes a damper unit that opens a cold air flow inlet facing the first cold air passage to store a damper and has the wiring storage chamber, and the rear heater is disposed in the damper unit. 3. The refrigerator according to 3.   An ice tray provided in the first storage chamber, a water supply tank provided in the second storage chamber, and a water supply pump for supplying water from the water supply tank to the ice tray via a water supply pipe, The refrigerator according to claim 2, wherein a water supply pump is disposed in the isolation chamber.   The pipe heater for heating the water supply pipe is provided, and the back heater has a first connector connected to the power supply side and a second connector connected to the pipe heater side. The refrigerator described.   3. A wall heater disposed on the heat insulating wall, wherein the rear heater includes a first connector connected to a power supply side, and a second connector connected to the wall heater side. -The refrigerator in any one of Claim 5.

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