JP6301746B2 - refrigerator - Google Patents

Description

  Embodiments of the present invention relate to refrigerators.

  2. Description of the Related Art Conventionally, there is known a refrigerator that opens a door that closes a front opening of a cabinet by a door opening device provided on an upper front portion of a ceiling wall of the cabinet. In such a refrigerator, a storage recess that is depressed downward is formed in the front upper portion of the ceiling wall of the cabinet, and the door opening device is stored in the storage recess.

JP 2002-71262 A

  However, at the front of the ceiling wall of the cabinet, the heat insulation thickness of the cabinet tends to be thinner than other parts, and if a storage recess for storing the door opening device is provided, the heat insulation performance is insufficient and condensation occurs around it. It becomes easy.

  Accordingly, an object of the present invention is to provide a refrigerator capable of suppressing the occurrence of dew condensation around the storage recess in the refrigerator provided with a storage recess for storing the door opening device in the front upper portion of the ceiling wall of the cabinet.

  The refrigerator of the present embodiment includes a cabinet in which a heat insulating material is provided between the inner box and the outer box, and a storage chamber that opens to the front is formed inside the inner box, and a door that closes the front opening of the cabinet. A door opening device for opening the cabinet, a vacuum heat insulating material provided on the ceiling wall of the cabinet, a refrigeration cycle for cooling the storage chamber, and a part of the high-temperature side refrigerant pipe of the refrigeration cycle. A ceiling heat dissipating pipe provided on the wall from one end to the other in the width direction, and a storage recess in which the front opening portion of the ceiling wall of the cabinet is depressed downward and the door opening device is stored, The ceiling heat radiating pipe is provided above the vacuum heat insulating material and in the vicinity of the housing recess.

It is sectional drawing of the refrigerator which concerns on one Embodiment of this invention. It is AA sectional drawing of FIG. It is a figure which shows the refrigerating cycle of the refrigerator of FIG. It is a block diagram which shows the electric constitution of the refrigerator of FIG. It is a principal part enlarged view of FIG. It is a top view of the refrigerator of FIG. It is a perspective view which shows the installation structure of a heat radiating pipe and a dew prevention pipe from a back direction.

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

  The refrigerator 1 which concerns on this embodiment is provided with the cabinet 2 opened to the front, as shown in FIG.1 and FIG.2. The cabinet 2 has a heat insulating material in a heat insulating space formed between an outer box 4 made of steel plate and an inner box 6 made of synthetic resin. A plurality of storage rooms are provided inside the cabinet 2. Specifically, as shown in FIG. 1, a refrigerating room 10 and a vegetable room 12 are provided in order from the top, and an ice making room 14 is provided below the storage room 10. Small freezer compartments (not shown) are provided side by side, and a freezer compartment 16 is provided below them. An automatic ice making device 18 is provided in the ice making chamber 14.

  The refrigerator compartment 10 and the vegetable compartment 12 are both storage compartments that are cooled to a refrigeration temperature zone (for example, 1 to 4 ° C.), and are partitioned vertically by a partition wall 20 made of synthetic resin. . A rotating heat insulating door 10 a pivotally supported by a hinge 5 is provided at the front opening of the refrigerator compartment 10. On the front surface of the heat insulating door 10a, there is an operation panel 13 provided with a display unit for displaying the internal temperature, a sound unit for emitting a buzzer sound and a sound, and an operation unit for adjusting the internal temperature, and a door by a user operation. An opening switch 17 for operating the opening device 15 is provided.

  As shown in FIG. 5, the door opening device 15 includes a solenoid 15 a and a plunger 15 b made of a magnetic material that moves by being magnetically attracted in the axial direction when the solenoid 15 a is energized. The upper part of the upper surface of the ceiling wall 2c of the cabinet 2 corresponding to the upper end is stored in a storage recess 15c formed by being depressed downward, and the upper part of the door opening device 15 is covered by a cover body 15d.

  The front end of the plunger 15b is provided with a knock pin 15e that comes into contact with the back surface of the heat insulating door 10a. When the operation of the door opening switch 17 is received, the solenoid 15a is energized, and the knock pin is moved in accordance with the forward movement of the plunger 15b. When the knock pin 15e presses the back surface side of the heat insulating door 10a forward, the heat insulating door 10a is pushed forward and opened.

  A drawer-type heat insulating door 12 a is provided at the front opening of the vegetable compartment 12. An upper and lower two-stage storage case 22 constituting a storage container is connected to the back surface of the heat insulating door 12a.

  The ice making room 14, the small freezing room, and the freezing room 16 are all storage rooms that are cooled to a freezing temperature zone (for example, −10 to −20 ° C.), the vegetable room 12, the ice making room 14, and the small freezing room. The space is partitioned vertically by a heat insulating partition wall 28 provided with a heat insulating material inside. A drawer-type heat insulating door 14a is provided at the front opening of the ice making chamber 14, and an ice storage container 30 is connected to the back surface of the heat insulating door 14a. Although not shown, a drawer-type heat insulating door connected to a storage container is also provided at the front opening of the small freezer compartment. Also at the front opening of the freezer compartment 16, a drawer-type heat insulating door 16 a to which two upper and lower storage containers 32 are connected is provided.

  A refrigeration cycle 50 (see FIG. 3) for cooling each storage chamber is incorporated in the cabinet 2. Although the details will be described later, the refrigeration cycle 50 includes a refrigeration room 10 that is a storage room in a refrigeration temperature zone, a refrigeration cooler 52 for cooling the vegetable compartment 12, an ice making room 14 that is a storage room in a refrigeration temperature zone, The freezing room and the freezing cooler 54 for cooling the freezing room 16 are comprised. As shown in FIG. 1, a machine room 34 is provided on the outer side of the outer box 4 of the cabinet 2, in this example, on the lower end of the back surface of the cabinet 2. In the machine room 34, a compressor 56 and a condenser 58 (see FIG. 3) constituting the refrigeration cycle 50, a cooling fan 57 (see FIG. 4) for cooling them, and the like are disposed.

  A refrigerated cooler room 36 and a duct 38 are formed in the back of the storage room (the refrigerated room 10 and the vegetable room 12) in the refrigerated temperature zone of the cabinet 2. The refrigeration cooler chamber 36 is provided with a refrigeration cooler 52 and a refrigeration fan 53, and the refrigeration fan 53 transmits the air in the refrigeration cooler chamber 36 cooled by the refrigeration cooler 52 through the duct 38. By supplying to 10 and the vegetable compartment 12, these storage compartments are cooled.

  A refrigeration cooler room 40 and a duct 44 are provided at the back of the storage room (the ice making room 14, the small freezer room, the freezer room 16) in the freezing temperature zone of the cabinet 2. A refrigeration cooler 54 and a refrigeration fan 55 are provided inside the refrigeration cooler chamber 40. The refrigeration fan 55 provided in the refrigeration cooler chamber 40 supplies the air in the refrigeration cooler chamber 40 cooled by the refrigeration cooler 54 to the ice making chamber 14, the small freezer compartment, and the freezer compartment 16 through the duct 44. Cool these storage chambers.

  A control board 46 on which a microcomputer or the like for controlling the refrigerator 1 is mounted is provided on the outside of the cabinet 2, for example, on the upper rear portion of the ceiling wall 2c of the cabinet 2. As shown in FIG. 4, the control board 46 includes a cabinet such as an operation panel 13, a door opening device 15, a door opening switch 17, a refrigeration fan 53, a refrigeration fan 55, a compressor 56, a cooling fan 57, and a three-way valve 70. 2 are electrically connected by lead wires 90, based on signals input from various sensors and switches and a control program stored in a memory in advance, operation panel 13, door The operation of the opening device 15, the refrigeration fan 53, the refrigeration fan 55, the compressor 56, the cooling fan 57 and the three-way valve 70 is controlled to control the overall operation of the refrigerator 1.

  Next, the configuration of the refrigeration cycle 50 will be described in detail. As shown in FIG. 3, the refrigeration cycle 50 includes, in order from the discharge side of the compressor 56 that discharges a high-temperature and high-pressure gaseous refrigerant, an evaporation pipe 60, a condenser 58, a heat radiating pipe 64, a dew-proof pipe 66, and a dryer. 68 and the inlet side of the three-way valve 70 are connected.

  A refrigeration capillary tube 72, a refrigeration cooler 52, a refrigeration accumulator 74, and a refrigeration suction pipe 76 as decompression means are sequentially connected to one outlet of the three-way valve 70 by piping. A freezing capillary tube 78, a freezing cooler 54, a freezing accumulator 80, a freezing suction pipe 82, and a check valve 84 are sequentially connected to the other outlet of the three-way valve 70 by piping. The outlet side of the check valve 84 and the outlet side of the refrigeration suction pipe 76 are connected together and connected to the suction side of the compressor 56.

  The three-way valve 70 is a switching valve that switches the flow path so that the refrigerant liquefied by the condenser 58 is alternately supplied to the refrigeration cooler 52 and the refrigeration cooler 54. The three-way valve 70 switches from the compressor 56 to the condenser 58 and the refrigeration. The state of the refrigeration cooling operation in which the low-temperature refrigerant supplied through the capillary tube 72 is supplied to the refrigeration cooler 52, and the state of the refrigeration cooling operation in which the refrigerant is supplied to the refrigeration cooler 54 without being supplied to the refrigeration cooler 52. Switch.

  In the refrigeration cycle 50, the refrigerant is compressed by the compressor 56, converted into a high-temperature and high-pressure gaseous refrigerant, and becomes a liquid refrigerant while radiating heat through the condenser 58, the heat radiating pipe 64, and the dew prevention pipe 66. . The liquid refrigerant is sent to the refrigerated capillary tube 72 or the freezing capillary tube 78 by the three-way valve 70, and is decompressed so that it can be easily vaporized in each capillary tube 72, 78, and then in the refrigerating cooler 52 or the freezing cooler 54. Cold air is generated by evaporating and taking heat away from the surroundings. The refrigerant that has taken heat from the surroundings flows to the accumulators 74 and 80, respectively. In each accumulator 74 and 80, the gas-liquid mixture refrigerant is separated into a gaseous refrigerant and a liquid refrigerant, respectively. Only the refrigerant returns to the compressor 56 through the suction pipes 76 and 82 and is compressed again to become a high-temperature and high-pressure gaseous refrigerant.

  Next, a specific configuration of the cabinet 2 will be described with reference to the drawings.

  The left side wall 2a, the right side wall 2b, the ceiling wall 2c, the bottom wall 2d, and the back wall 2e of the cabinet 2 are flat vacuum heat insulating materials 7a, 7b in a heat insulating space formed between the outer box 4 and the inner box 6. , 7c, 7d, and 7e. Further, in the heat insulating space of the cabinet 2, vacuum heat insulating materials such as the periphery of the machine room 34, the corners of the cabinet 2, the space on the outer box 4 side of the ceiling wall 2 c and the bottom wall 2 d, the inside of the heat insulating partition wall 28, etc. In the non-existing location, a heat insulating material 9 different from the vacuum heat insulating material such as urethane foam, polystyrene foam, corrugated cardboard, etc., as well as a heat radiating pipe 64, a dew proof pipe 66, a refrigerated capillary tube 72, a refrigerated suction pipe 76, a frozen capillary tube 78 Refrigerant pipes such as the frozen suction pipe 82 and lead wires 90 that electrically connect the electrical components provided inside or outside the cabinet 2 and the control board 46 are provided.

  Specifically, the steel plate outer box 4 constituting the outer shell of the cabinet 2 has a box shape opened to the front surface having the left side plate 4a, the right side plate 4b, the top plate 4c, the bottom plate 4d and the back plate 4e. . The left side plate 4a, the right side plate 4b, and the top plate 4c are formed by bending a single long steel plate into a substantially U shape. The bottom plate 4d and the back plate 4e are members provided separately from the left side plate 4a, the right side plate 4b, and the top plate 4c. The step plate 4d-1 for forming the machine room 34 is folded on the bottom plate 4d. A song is formed.

  Further, as shown in FIG. 2, in the left side plate 4a and the right side plate 4b, flange portions 4a-1 and 4b-1 projecting inward are formed at the front end portion, and the front end portion is directed forward. The flange portions 4a-2 and 4b-2 are formed. Further, flange portions 4e-1 and 4e-2 that are inserted and engaged with the flange portions 4a-2 and 4b-2 of the left side plate 4a and the right side plate 4b are formed at the left and right ends of the back plate 4e. .

  The inner box 6 made of synthetic resin is integrally formed by a vacuum molding machine, and the left side plate 6a facing the left side plate 4a, right side plate 4b, top plate 4c, bottom plate 4d and back plate 4e of the outer box 4, respectively. It has a box shape opened to the front surface having the right side plate 6b, the top plate 6c, the bottom plate 6d and the back plate 6e.

  The bottom plate 6d of the inner box 6 is formed with a step portion 6d-1 for forming the machine chamber 34 corresponding to the step portion 4d-1 of the bottom plate 4d of the outer box 4.

  A flange portion 6a-1 inserted and engaged with flange portions 4a-1 and 4b-1 of the left side plate 4a and the right side plate 4b of the outer box 4 is provided at the front end portions of the left side plate 6a and the right side plate 6b of the inner box 6. 6b-1 is formed.

  Moreover, as shown in FIG.1 and FIG.2, the chamfering part which protrudes inward of the inner box 6 rather than the said corner | angular part is formed in the corner | angular part which the back plate 6e of the inner box 6 and the other board connected to this make. 6ae, 6be, and 6ce are formed. Specifically, a chamfered portion 6ae for connecting the left side plate 6a and the back plate 6e is provided along the vertical direction at a corner portion formed by the left side plate 6a and the back plate 6e of the inner box 6. A chamfered portion 6be that connects the right side plate 6b and the back plate 6e is provided along a vertical direction at a corner portion formed by the right side plate 6b and the back plate 6e, and the top plate 6c and the back plate 6e of the inner box 6 are provided. A chamfered portion 6ce that connects the top plate 6c and the back plate 6e is provided in the corner portion formed along the refrigerator width direction.

  The electrical components provided inside or outside the cabinet 2 such as the refrigeration fan 53, the freezing fan 55, the compressor 56, the cooling fan 57, and the three-way valve 70 are heat insulating spaces of the chamfered portions 6ae, 6be, and 6ce of the inner box 6. The lead wire 90 arranged along the side is electrically connected to the control board 46 provided on the rear upper surface of the ceiling wall 2 c of the cabinet 2.

  The refrigeration capillary tube 72 and the refrigeration suction pipe 76 of the refrigeration cycle 50 are integrated so as to exchange heat with each other by brazing or the like to form a refrigeration pipe body 73. The refrigeration capillary tube 78 and the refrigeration suction pipe 82 of the refrigeration cycle 50 are The refrigeration pipe body 79 is integrated by heat brazing or the like so as to exchange heat with each other.

  The refrigerated pipe body 73 and the refrigerated pipe body 79 penetrate the inner box 6 and enter the heat insulating space, pass through the heat insulating space side of the chamfered portions 6ae, 6be, 6ce, and the stepped portion 4d of the bottom plate 4d of the outer box 4. -1 through the machine room 34. The refrigeration pipe body 73 and the refrigeration pipe body 79 are separated into capillary tubes 72 and 78 and suction pipes 76 and 82 in the machine chamber 34, and the capillary tubes 72 and 78 are connected to the outlet side of the three-way valve 70. Is connected to the suction side of the compressor 56.

  The heat radiating pipe 64 and the dew proof pipe 66 are refrigerant pipes provided between the outlet side of the condenser 58 and the inlet side of the three-way valve 70, and the refrigerant is decompressed by the refrigerated capillary tube 72 and the frozen capillary tube 78. This constitutes a part of the high-temperature side refrigerant pipe through which the previous liquid refrigerant flows, and is embedded in the heat insulating space of the cabinet 2 so as to be in contact with the outer box 4. In this example, as shown in FIG. 7, the heat radiating pipe 64 penetrates the stepped portion 4 d-1 of the outer box 4 from the machine room 34 and enters the heat insulating space, and is provided on the back wall 2 e of the cabinet 2. The back plate radiating pipe 64E, the right radiating pipe 64B provided on the right side wall 2b, the ceiling radiating pipe 64C provided on the ceiling wall 2c, and the left radiating pipe 64A provided on the left side wall 2a. .

  As shown in FIG. 2, the back plate heat radiating pipe 64E, the right heat radiating pipe 64B, and the left heat radiating pipe 64A are recessed grooves 7e-1, 7b- provided on the outer casing 4 side of the vacuum heat insulating materials 7e, 7b, 7a. 1, 7a-1, and contacts the back plate 4e, the right side plate 4b, and the left side plate 4a of the outer box 4 that covers the outside of the vacuum heat insulating materials 7e, 7b, and 7a.

  As shown in FIGS. 5 and 6, the ceiling heat radiating pipe 64 </ b> C is provided between the vacuum heat insulating material 7 c provided on the ceiling wall 2 c of the cabinet 2 and the top plate 4 c of the outer box 4. It is embed | buried so that the top plate 4c may be contacted.

  The vacuum heat insulating material 7c provided on the ceiling wall 2c is affixed over a wide range from the rear end portion to the front end portion of the top plate 6c of the inner box 6. Specifically, the front part of the vacuum heat insulating material 7c is vertically arranged with at least a part of the storage concave part 15c (at least the rear part of the storage concave part 15c) provided at the front upper part of the ceiling wall 2c and the heat insulating material 9. The heat insulating portion 46a of the control board 46 such as a transformer is preferably disposed at the rear part of the vacuum heat insulating material 7c at least a part of the control board 46 provided on the rear upper surface of the ceiling wall 2c of the cabinet 2. It arrange | positions so that a part of control board 46 containing may overlap with an up-down direction.

  The ceiling heat radiating pipe 64 </ b> C is disposed closer to the rear of the housing recess 15 c in which the door opening device 15 is housed than the control board 46 provided on the ceiling wall 2 c of the cabinet 2, and is provided on the left and right side walls 2 a and 2 b of the cabinet 2. At the upper end, the left and right heat radiating pipes 64A, 64B extending forward from the rear end are connected to one end from the other in the width direction of the ceiling wall 2c.

  In such a heat radiating pipe 64, the high-temperature and high-pressure refrigerant that has flowed out of the condenser 58 flows in the order of the back plate heat radiating pipe 64E, the right heat radiating pipe 64B, the ceiling heat radiating pipe 64C, and the left heat radiating pipe 64A. Flow into.

  Note that the back plate heat radiating pipe 64E, the right heat radiating pipe 64B, and the left heat radiating pipe 64A are outside the vacuum heat insulating materials 7e, 7b, 7a in the heat insulating space (on the outer box 4 side) and close to the peripheral edge thereof. You may arrange. The front end portions of the left and right side walls 2a and 2b of the cabinet 2 and the corner portions of the left and right side walls 2a and 2b and the back wall 2e are difficult to provide a vacuum heat insulating material, compared with the places covered with the vacuum heat insulating material. Although it is difficult to ensure the heat insulation performance, the heat insulation performance is ensured by arranging the back plate heat radiation pipe 64E, the right heat radiation pipe 64B, and the left heat radiation pipe 64A close to the outer peripheral edge of the vacuum heat insulating material 7e, 7b, 7a. It is possible to suppress the occurrence of condensation at the front end and corner of the difficult cabinet 2.

  Moreover, although this embodiment demonstrated the case where the ceiling heat radiating pipe 64C was provided in the linear form extended in the width direction, ceiling heat radiation is carried out from the width direction one end to the other end of the ceiling wall 2c of the cabinet 2, meandering back and forth or right and left. A pipe 64C may be provided.

  The dew proof pipe 66 is a refrigerant pipe connected to the downstream side of the left heat radiating pipe 64 </ b> A in the refrigerant flow direction, and is disposed at the peripheral edge of the front opening of each storage chamber 10, 12, 14, 16 provided in the cabinet 2. The condensation heat suppresses the dew around the door.

  In this example, the dew-proof pipe 66 is sequentially arranged around the front opening of the ice making room 14, the small freezing room, the vegetable room 12, and the refrigeration room 10 from the freezing room 16 positioned at the bottom of the cabinet 2. . And the dewproof pipe 66 arrange | positioned at the front opening part of the refrigerator compartment 10 located in the uppermost stage of the cabinet 2 passes through each front end part of the left side wall 2a of the cabinet 2, the ceiling wall 2c, and the right side wall 2b. When reaching the lower front end of the right side wall 2 b of the cabinet 2, it bends backward and extends rearward along the lower end of the right side wall 2 b and enters the machine room 34 and is connected to the dryer 68.

  As shown in FIGS. 1 and 2, the left radiating pipe 64A, the right radiating pipe 64B, and the back radiating pipe 64E are recessed on the inner surfaces of the left side plate 4a, the right side plate 4b, and the back plate 4e of the outer box 4. The vacuum heat insulating materials 7a, 7b, 7e are adhered to the inner surface of the top plate 4c of the outer box 4 with an adhesive such as a surface adhesive tape or hot melt in a state of being accommodated in the grooves 7a-1, 7b-1, 7e-1. The ceiling heat radiating pipe 64C is fixed by a metal foil tape or the like at a position close to the housing recess 15c. Further, vacuum heat insulating materials 7c and 7d are bonded to the outer surfaces of the top plate 6c and the bottom plate 6d of the inner box 6 by an adhesive such as a double-sided adhesive tape or hot melt.

  Then, the inner box 6 is arranged inside the left side plate 4a, the right side plate 4b, and the top plate 4c of the outer box 4, and the flanges 6a-1a and 6b-1a of the left side plate 6a and the right side plate 6b of the inner box 6 are arranged. The left side plate 4a and the right side plate 4b of the outer box 4 are inserted and engaged with the flange portions 4a-1 and 4b-1.

  After that, in the heat insulating space formed between the inner box 6 and the outer box 4, the heat radiating pipe 64, the dew proof pipe 66, the refrigerated capillary tube 72, the refrigerated suction pipe 76, the refrigeration capillary are provided in a place where the vacuum heat insulating material 7 does not exist. A lead wire 90 that electrically connects the refrigerant pipe such as the tube 78 and the frozen suction pipe 82 and the electrical components provided inside or outside the cabinet 2 and the control board 46 is disposed.

  Then, the bottom plate 4d of the outer box 4 is attached to the left side plate 4a and the right side plate 4b of the outer case 4, and the back plate 4e of the outer box 4 is attached to the left side plate 4a, the right side plate 4b, and the bottom plate 4d to the back plate 4e. The provided vacuum heat insulating material 7 e is pressed against the outer surface of the back plate 6 e of the inner box 6.

  Thereafter, the front opening of the outer box 4 and the inner box 6 is directed downward, and a foaming jig is fitted in the inner box 6 so that an injection (not shown) provided on the back plate 4e of the outer box 4 is performed. A cabinet 2 is formed by injecting a stock solution of foam heat insulating material such as urethane foam from the hole and foam filling the heat insulating material 9 in places where the vacuum heat insulating materials 7a, 7b, 7c, 7d, 7e do not exist in the heat insulating space. The

  In the present embodiment as described above, the ceiling heat radiating pipe 64 </ b> C constituting a part of the high temperature side refrigerant pipe is provided on the ceiling wall 2 c of the cabinet 2 in the vicinity of the storage recess 15 c that stores the door opening device 15. Therefore, it is possible to heat the storage recess 15c that tends to have insufficient heat insulation performance, and to suppress the occurrence of condensation around the storage recess 15c. Moreover, since the ceiling heat radiating pipe 64C is disposed above the vacuum heat insulating material 7c, the heat of the ceiling heat radiating pipe 64C is less likely to leak into the cabinet, and the area around the storage recess 15c is efficiently suppressed while suppressing the rise in the temperature inside the cabinet. Can be heated.

  Moreover, in this embodiment, the vacuum heat insulating material 7c is provided in the ceiling wall 2c of the cabinet 2 so that it may overlap with the at least one part of the storage recessed part 15c in the up-down direction, and heat insulation performance is provided to the storage recessed part 15c which is hard to ensure heat insulation thickness. Since the high vacuum heat insulating material 7c is arrange | positioned, dew condensation can be suppressed in the circumference | surroundings of the accommodation recessed part 15c. Moreover, since the heat insulating material 9 different in kind from the vacuum heat insulating material such as the foam heat insulating material is provided between the housing recess 15c and the vacuum heat insulating material 7c, the heat insulating material 9 is provided at a place where it is difficult to arrange the vacuum heat insulating material. By providing the heat insulation performance around the storage recess 15c, it is possible to suppress condensation.

  In this embodiment, since the vacuum heat insulating material 7c provided on the ceiling wall 2c of the cabinet 2 is affixed to the top plate 6c of the inner box 6, the flat vacuum heat insulating material 7c is disposed at a predetermined position in the heat insulating space. Cheap.

  In the present embodiment, a control board 46 for controlling the overall operation of the refrigerator 1 is provided at the rear upper surface of the ceiling wall 2c of the cabinet 2, and the ceiling heat radiating pipe 64C is placed closer to the housing recess 15c than the control board 46. 2c, the rear part of the ceiling wall 2c can be heated by the heat generated from the control board 46, and the front part of the ceiling wall 2c can be heated by the heat of the ceiling heat radiating pipe 64C. Condensation can be suppressed.

  In the present embodiment, the dew-proof pipe 66 provided at the upper end of the front opening of the cabinet 2, that is, the front end of the ceiling wall 2c is provided downstream of the ceiling heat radiating pipe 64C in the refrigerant flow direction. In addition, a dew-proof pipe 66 through which a refrigerant having a lower temperature than the ceiling heat radiating pipe 64C flows can be disposed at the front end of the cabinet 2 where it is difficult to dispose the vacuum heat insulating material, and the heat of the high-temperature side refrigerant pipe leaks into the cabinet. Can be suppressed.

  As mentioned above, although embodiment of this invention was described, these embodiment was shown as an example and is not intending limiting the range of invention. These embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. These embodiments and modifications thereof are included in the invention described in the claims and equivalents thereof as well as included in the scope and gist of the invention.

DESCRIPTION OF SYMBOLS 1 ... Refrigerator, 2 ... Cabinet, 2c ... Ceiling wall, 4 ... Outer box, 4c ... Top plate, 6 ... Inner box, 6c ... Top plate, 7a-7e ... Vacuum heat insulating material, 9 ... Heat insulating material, 10 ... Cold room DESCRIPTION OF SYMBOLS 10a ... Thermal insulation door, 12 ... Vegetable room, 14 ... Ice making room, 15 ... Door opening apparatus, 15a ... Solenoid, 15b ... Plunger, 15c ... Storage recessed part, 15d ... Cover body, 15e ... Knock pin, 16 ... Freezing room, 17 ...... Opening switch, 46 ... Control board, 50 ... Refrigeration cycle, 52 ... Refrigeration cooler, 54 ... Refrigeration cooler, 56 ... Compressor, 58 ... Condenser, 64 ... Radiation pipe, 64A ... Left radiation pipe, 64B ... Right heat radiation pipe, 64C ... Ceiling heat radiation pipe, 64E ... Back plate heat radiation pipe, 66 ... Dew prevention pipe

Claims (6)

A cabinet in which a heat insulating material is provided between the inner box and the outer box, and a storage chamber is formed on the inner side of the inner box and opened to the front;
A door opening device for opening a door closing the front opening of the cabinet;
Vacuum heat insulating material provided on the ceiling wall of the cabinet;
A refrigeration cycle for cooling the storage chamber;
A ceiling heat dissipating pipe that constitutes a part of the high temperature side refrigerant pipe of the refrigeration cycle and is provided from one end to the other end in the width direction on the ceiling wall of the cabinet;
A storage recess formed by sinking the upper front portion of the ceiling wall of the cabinet downward and storing the door opening device, and
The ceiling heat radiating pipe is a refrigerator provided above the vacuum heat insulating material and in proximity to the housing recess.   The refrigerator according to claim 1, wherein at least a part of the storage recess overlaps with the vacuum heat insulating material in a vertical direction.   The refrigerator according to claim 2, wherein a different type of heat insulating material from the vacuum heat insulating material is provided between the housing recess and the vacuum heat insulating material.   The refrigerator according to any one of claims 1 to 3, wherein the vacuum heat insulating material is attached to the inner box. Comprising a control board provided at the rear upper surface of the ceiling wall of the cabinet;
The refrigerator according to any one of claims 1 to 4, wherein the ceiling heat radiating pipe is provided on the ceiling wall closer to the housing recess than the control board.   6. The dew proof pipe constituting a part of the high temperature side refrigerant pipe and provided downstream of the ceiling heat radiating pipe in the refrigerant flow direction is provided at an upper end of the front opening of the cabinet. The refrigerator of Claim 1.

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