JP2014077615A - Refrigerator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve energy saving effect by reducing power consumption necessary for cooling, by reducing heat flowing into a storage compartment from a dew-proofing pipe.SOLUTION: A refrigerator includes a heat insulating housing having an opening, a frame member, and a refrigeration cycle. A storage compartment is composed of a storage compartment of a refrigerating temperature zone, and a storage compartment of a freezing temperature zone. The refrigeration cycle has a compressor, a cooler, and a first dew-proofing pipe and a second dew-proofing pipe in which a refrigerant flows. The first dew-proofing pipe is disposed in a state of surrounding the circumference of the opening through right and left side walls of the heat insulating housing, and a front end inner portion of a ceiling wall without passing through the inside of the frame member. The second dew-proofing pipe is disposed at a downstream side of the first dew-proofing pipe with respect to the refrigerant flow, surrounding the circumference of, at least an inlet/outlet of the storage compartment of the freezing temperature zone through the inside of the frame member and front end inner portions of the right and left side walls, and disposed in parallel with the first dew-proofing pipe at a front side of the first dew-proofing pipe at a part passing through a side part of the storage compartment of the freezing temperature zone, of the part passing through the front end inner portions of the right and left side walls.

Description

  Embodiments of the present invention relate to a refrigerator.

  Conventionally, a pipe through which a high-temperature refrigerant constituting a part of the refrigeration cycle passes is provided around the opening of the refrigerator as a dew-proof pipe. In such a refrigerator, dew condensation around the opening is suppressed by heating the periphery of the opening of the refrigerator with the heat of the dew-proof pipe.

  However, if the temperature of the refrigerant flowing in the dew prevention pipe, that is, the temperature of the dew prevention pipe is high, a large amount of the heat flows into the storage chamber, and the temperature in the storage chamber rises. Then, extra power is consumed to cool the raised storage chamber, and the energy saving effect may be hindered. This was particularly significant for storage rooms in the freezing temperature zone where the temperature difference from the outside air was large.

JP 2010-38528 A

  Therefore, by using the pipe through which the refrigerant of the refrigeration cycle flows as a dew-proof pipe, the heat that flows from the dew-proof pipe into the storage chamber is reduced, thereby reducing the power consumption required for cooling. A refrigerator that can be reduced to improve the energy saving effect is provided.

  The refrigerator of the present embodiment has a heat insulating box that has an opening formed on the front surface and has a plurality of storage chambers inside, a frame member that is provided in the heat insulating box and partitions the opening to form an entrance of the storage chamber, A refrigeration cycle for generating cold air for cooling each of the storage chambers. The plurality of storage rooms are composed of a storage room in a refrigeration temperature zone and a storage room in a freezing temperature zone. The refrigeration cycle includes a compressor, a cooler, and a first dew-proof pipe and a second dew-proof pipe that flow the refrigerant pumped from the compressor to the cooler. The first dew-proof pipe is provided so as to surround the opening through the left and right side walls of the heat insulation box and the inside of the front end of the ceiling wall without passing through the inside of the frame member. The second dew proof pipe is on the downstream side of the first dew proof pipe with respect to the flow of the refrigerant, and stores at least the refrigeration temperature zone through the inside of the frame member and the inside of the front end of the left and right side walls. A portion passing through the inside of the front end of the left and right side walls and passing through the side of the storage compartment in the refrigeration temperature zone is on the front side of the first dew prevention pipe It is provided in parallel with the pipe.

Vertical side view showing the refrigerator according to the first embodiment The perspective view which shows schematic structure of a heat insulation box Diagram showing schematic configuration of refrigeration cycle The figure which shows arrangement of the first dew-proof pipe and the second dew-proof pipe The figure which shows arrangement | positioning of a 1st dew prevention pipe and a 2nd dew prevention pipe in the state which expand | deployed the left-right side wall and the ceiling wall of the heat insulation box Transverse plan view along line X6-X6 in FIG. Transverse plan view along line X7-X7 in FIG. FIG. 4 equivalent view according to the second embodiment Figure equivalent to FIG. Transverse plan view along line X10-X10 in FIG.

  Hereinafter, refrigerators according to a plurality of embodiments will be described with reference to the drawings. In addition, in each embodiment, the same code | symbol is attached | subjected to the substantially same component, and description is abbreviate | omitted.

(First embodiment)
As shown in FIGS. 1 and 2, the refrigerator 10 is configured mainly with a heat insulating box 11. The heat insulation box 11 is configured as a vertically long rectangular box having a left side wall 12, a right side wall 13, a ceiling wall 14, a bottom wall 15, and a rear wall 16. An opening 111 surrounded by the left side wall 12, the right side wall 13, the ceiling wall 14, and the bottom wall 15 is formed on one surface of the heat insulating box 11. Hereinafter, the opening 111 side of the heat insulation box 11, that is, the left side in FIG. 1 will be described as the front side of the refrigerator 10.

  As shown in FIG. 1, the heat insulating box 11 is configured by providing a heat insulating member 19 between a steel plate outer box 17 and a synthetic resin inner box 18 that are previously configured in a box shape, for example. In addition, you may comprise the heat insulation box 11 in the box shape combining the wall divided | segmented into plurality. For example, the left side wall 12, the right side wall 13, the ceiling wall 14, the bottom wall 15, and the rear wall 16 may be individually configured and then combined to form a box. As the heat insulating member 19, for example, a filling type such as foaming urethane, a previously formed one such as a vacuum heat insulating panel, or a combination of these is used.

  A plurality of frame members, in this case, an upper horizontal frame member 20, a middle horizontal frame member 21, a lower horizontal frame member 22, and a vertical frame member 23 are located inside the heat insulating box 11 and in the vicinity of the opening 111 in the front-rear direction. Is provided. These frame members 20 to 23 are configured in a rectangular tube whose rear side is closed or opened, for example, by bending a steel plate or the like. Inside the frame members 20 to 23, for example, members having heat insulation properties such as foamed polystyrene, sponge, and urethane foam are provided. The upper horizontal frame member 20 is provided at a substantially central portion in the vertical direction of the heat insulating box 11 and connects the left side wall 12 and the right side wall 13. The middle horizontal frame member 21 is below the upper horizontal frame member 20 and connects the left side wall 12 and the right side wall 13. The lower horizontal frame member is below the middle horizontal frame member 21 and connects the left side wall 12 and the right side wall 13. The vertical frame member 23 is located at a substantially central portion in the left-right direction of the middle horizontal frame member 21 and the lower horizontal frame member 22, and connects the middle horizontal frame member 21 and the lower horizontal frame member 22.

On the rear side of the middle horizontal frame member 21, a heat insulating partition plate 25 having heat insulating properties is provided, and the inside of the heat insulating box 11 is partitioned into storage chambers of different temperature zones. In this case, the upper part of the heat insulation partition plate 25 is set as a storage room in a refrigeration temperature zone, and the lower part of the heat insulation partition plate 25 is set in a storage room in a refrigeration temperature zone.
Specifically, inside the heat insulating box 11 and above the heat insulating partition plate 25, a refrigerating room 30 and a vegetable room 31 are provided in order from the top as a refrigerating temperature zone storage room. The refrigerator compartment 30 and the vegetable compartment 31 are partitioned by a resin partition plate 26 provided on the rear side of the upper horizontal frame member 20. As shown in FIG. 1, a vent hole 261 is formed in the rear part of the partition plate 26, and the refrigerator compartment 30 and the vegetable compartment 31 communicate with each other through the vent hole 261.

  Below the heat insulating partition plate 25, an ice making room 32, an upper freezing room 33, and a lower freezing room 34 are provided as storage rooms for a freezing temperature zone. The ice making chamber 32 and the upper freezing chamber 33 are provided side by side below the heat insulating partition plate 25. The lower freezing chamber 34 is provided below the ice making chamber 32 and the upper freezing chamber 33, that is, at the lowermost portion of the heat insulating box 11.

  In this case, the entrance / exit 301 of the refrigerator compartment 30 is formed to be surrounded by the front end of the left side wall 12, the front end of the right side wall 13, the front end of the ceiling wall 14, and the upper horizontal frame member 20. The entrance 311 of the vegetable compartment 31 is formed so as to be surrounded by the front end of the left side wall 12, the front end of the right side wall 13, the upper horizontal frame member 20, and the middle horizontal frame member 21. The entrance / exit 321 of the ice making chamber 32 is formed by being surrounded by the front end of the left side wall 12, the middle horizontal frame member 21, the lower horizontal frame member 22, and the vertical frame member 23. The entrance / exit 331 of the upper freezer compartment 33 is formed to be surrounded by the front end of the right side wall 13, the middle horizontal frame member 21, the lower horizontal frame member 22, and the vertical frame member 23. The entrance / exit 341 of the lower freezing chamber 34 is formed so as to be surrounded by the front end of the left side wall 12, the front end of the right side wall 13, the front end of the bottom wall 15, and the lower side horizontal frame member 22.

  The refrigerator compartment 30 and the vegetable compartment 31 are usually set to different refrigeration temperature zones. For example, the maintenance temperature of the refrigerator compartment 30 is set to 1 to 5 ° C., and the maintenance temperature of the vegetable compartment 31 is set to 2 to 6 ° C., which is slightly higher than that. As shown in FIG. 1, a hinged refrigeration room heat insulation door 35 is provided on the front surface of the refrigeration room 30. A drawer-type heat insulating door 36 for vegetable rooms is provided on the front surface of the vegetable room 31. A storage container 37 configured in two upper and lower stages is attached to the back surface of the vegetable room heat insulation door 36. The storage container 37 stores vegetables and fruits.

  The ice making chamber 32, the upper freezing chamber 33, and the lower freezing chamber 34 are all set to a freezing temperature zone, for example, a minus temperature zone of −10 to −20 ° C. On the front side of the upper freezer compartment 33, a drawer type upper freezer compartment heat insulating door 39 to which a storage container 38 is connected is provided. On the front side of the lower freezer compartment 34, a drawer-type lower freezer compartment heat insulating door 41 to which a storage container 40 configured in two stages is connected is provided. Although not shown in detail, a drawer-type ice making heat insulation door connected to a storage container is also provided on the front side of the ice making room 32.

  The refrigerator 10 incorporates a refrigeration cycle 60 shown in FIG. The refrigeration cycle 60 includes a compressor 61, a condenser 62, a refrigeration cooler 63, and a refrigeration cooler 64, and these are connected in a ring shape. As shown in FIG. 1, the compressor 61 is provided in a machine room 42 formed at the lower rear end of the refrigerator 10. Further, the machine room 42 is provided with an evaporating dish 43, a condenser 62 shown in FIG. 3, a cooling fan (not shown) for cooling the compressor 61 and the condenser 62, and the like. The refrigerating cooler 63 generates cold air for cooling the refrigerating temperature zone storage room, that is, the refrigerating room 30 and the vegetable room 31. The refrigeration cooler 64 generates cold air for cooling the freezing temperature zone storage room, that is, the ice making room 32, the upper freezing room 33, and the lower freezing room 34.

  A refrigeration duct 44 is provided at the rear of the storage room in the refrigerator 10, that is, the refrigeration room 30 and the vegetable room 31. The refrigeration duct 44 has a suction port 441 provided on the vegetable compartment 31 side and a plurality of supply ports 442 provided on the refrigeration chamber 30 side. The inside of the refrigeration duct 44 communicates with the vegetable compartment 31 through the suction port 441, and communicates with the inside of the refrigeration chamber 30 through the supply port 442.

  In the refrigeration duct 44, a refrigeration fan 45 is provided in the vicinity of the suction port 441, and a refrigeration cooler 63 is provided above the refrigeration fan 45. When the refrigeration fan 45 is driven, the air in the vegetable compartment 31 is sucked into the refrigeration duct 44 from the suction port 441 by the air blowing action of the refrigeration fan 45. Then, the air passes through the refrigeration cooler 63 and is cooled, and is supplied as cold air from the supply port 442 into the refrigeration chamber 30. The cool air supplied into the refrigerator compartment 30 cools the refrigerator compartment 30 and then flows into the vegetable compartment 31 through the vent 261. The cold air flowing into the vegetable compartment 31 is sucked into the refrigeration duct 44 from the suction port 441 again after the vegetable compartment 31 is cooled. In this way, cold air circulates and the refrigerator compartment 30 and the vegetable compartment 31 are cooled.

  In addition, a refrigeration drain 46 is provided in the refrigeration duct 44 and below the refrigeration cooler 63. The refrigeration side drainage basin 46 receives the defrost water from the refrigeration cooler 63 and discharges it to the outside. The refrigeration side drainage basin 46 is connected to the evaporating dish 43 of the machine room 42. The defrosted water received by the refrigeration side drainage basin 46 is guided to the evaporating dish 43 and evaporates.

  A refrigeration duct 47 is provided at the rear of the freezing temperature zone, that is, the ice making room 32, the upper freezing room 33, and the lower freezing room 34 in the refrigerator 10. The freezing duct 47 has a plurality of supply ports 471 corresponding to the ice making chamber 32, the upper freezing chamber 33, and the lower freezing chamber 34, and an intake port 472 located at the rear of the lower freezing chamber 34. The inside of the refrigeration duct 47 communicates with the storage chambers 32, 33, and 34 in the freezing temperature zone via the supply port 471, and communicates with the inside of the lower freezing chamber 34 via the suction port 472.

  A refrigeration fan 48 is provided in the vicinity of the supply port 471 in the refrigeration duct 47, and a refrigeration cooler 64 is provided below the refrigeration fan 48. When the refrigeration fan 48 is driven, the air in the lower freezer compartment 34 is sucked into the refrigeration duct 47 from the suction port 472 by the blowing action of the refrigeration fan 48. Then, the air passes through the refrigeration cooler 64, is cooled, and is supplied as cold air from the supply ports 471 to the storage rooms 32, 33, and 34 in the refrigeration temperature zone. Then, the cool air cools the storage chambers 32, 33, and 34 and then is sucked into the freezing duct 47 from the suction port 472 again. In this way, the cold air circulates, and the ice making chamber 32, the upper freezing chamber 33, and the lower freezing chamber 34 are cooled.

  A freezing side drainage basin 49 is provided in the freezing duct 47 and below the freezing cooler 64. The freezing side drainage basin 49 receives the defrosted water from the freezing cooler 64 and discharges it to the outside. The freezing drain 49 is connected to the evaporating dish 43 in the machine room 42. The defrost water received by the freezing side drainage basin 49 is guided to the evaporating dish 43 and evaporates. In addition, a control device 50 is provided near the lower rear portion of the refrigerator 10. The control device 50 includes a microcomputer, a timer, a storage device, and the like (not shown). The control device 50 controls the compressor 61 of the refrigeration cycle 60, the refrigeration fan 45, the refrigeration fan 48, and the like.

  Next, the configuration of the refrigeration cycle 60 will be described. The refrigeration cycle 60 is configured from the discharge side of the compressor 61 to the three-way valve 65 by a single flow without branching. The three-way valve 65 is branched into two flows of the refrigeration cooler 63 side and the refrigeration cooler 64, and then merges and is connected to the suction side of the compressor 61.

  First, the configuration from the three-way valve 65 to the compressor 61 will be described. The three-way valve 65 has one inlet and two outlets. A refrigeration side capillary tube 66 and a refrigeration cooler 63 are sequentially connected to one of the two outlets of the three-way valve 65, and then connected to the suction side of the compressor 61 via a refrigeration side suction pipe 67. Has been. A freezing side capillary tube 68 and a freezing cooler 64 are sequentially connected to the other of the two outlets of the three-way valve 65, and then the compressor 61 is connected via the freezing side suction pipe 69 and the check valve 70. It is connected to the.

  The three-way valve 65 is connected to the control device 50. The three-way valve 65 is driven in response to a control command from the control device 50, and selectively switches one of the two outlets communicating with the inlet. Thereby, the refrigerant pumped from the compressor 61 is supplied to either the refrigeration cooler 63 side or the refrigeration cooler 64 side. The refrigerant supplied from the three-way valve 65 to the refrigeration cooler 63 side or the refrigeration cooler 64 side is depressurized by the capillary tubes 66, 68 and then vaporized by the coolers 63, 64 to thereby cool the coolers 63, 64. Reduce the temperature. The refrigerant having a low temperature in the coolers 63 and 64 undergoes heat exchange with outside air or the like while passing through the suction pipes 67 and 69, and is sucked into the compressor 61 in a state where the temperature is raised to some extent.

  Next, the configuration from the compressor 61 to the three-way valve 65 will be described. From the high-pressure discharge side of the compressor 61 to the three-way valve 65, in the order of refrigerant flow, the evaporating pipe 71, the condenser 62, the rear side heat radiating pipe 73, the right side heat radiating pipe 74, the ceiling side heat radiating pipe 75, the left side heat radiating pipe 76, A first dew-proof pipe 77, a second dew-proof pipe 78, and a dryer 79 are connected. The downstream side of the dryer 79 is connected to the three-way valve 65. The evaporation pipe 71 is provided near the evaporation dish 43 in the machine chamber 42. The evaporating dish 43 is heated by the heat of the high-temperature and high-pressure refrigerant flowing in the evaporating pipe 71, thereby promoting the evaporation of the defrosted water in the evaporating dish 43.

  The condenser 62 is constituted by, for example, a fin tube having a large number of heat radiation fins, and is provided on the back side of the heat insulating box 11. Each of the heat radiating pipes 73, 74, 75, 76 is made of a metal pipe such as iron or copper. Among these, the rear side heat radiating pipe 73 is provided around the inside of the rear wall 16. The right heat radiating pipe 74 is provided by being routed around the right side wall 13. The ceiling side heat radiating pipe 75 is provided by being routed around the ceiling wall 14. The left heat radiating pipe 76 is routed around the left side wall 12.

  The first dew-proof pipe 77 and the second dew-proof pipe 78 are made of different materials and different members. In this case, the first dew-proof pipe 77 is made of, for example, a relatively inexpensive iron pipe. On the other hand, the second dew-proof pipe 78 is made of a copper tube that is more expensive than the first dew-proof pipe 77 but has excellent corrosion resistance and thermal conductivity. Here, the arrangement of the first dew-proof pipe 77 and the second dew-proof pipe 78 will be described with reference to FIGS.

  In the machine room 42, the upstream end of the first dew proof pipe 77 is connected to the downstream end of the left radiating pipe 76 by brazing or the like. Thereafter, as shown in FIGS. 4 and 5, the first dew-proof pipe 77 enters the lower end of the left side wall 12 from the lower rear end portion of the left side wall 12, and the inside of the lower end portion of the left side wall 12 passes through the lower end portion of the left side wall 12. It extends forward along the lower edge. Thereafter, the first dew-proof pipe 77 is bent upward near the front end of the left side wall 12, that is, in the vicinity of the opening 111 of the heat insulating box 11. The first dew-proof pipe 77 linearly extends upward in the front end of the left side wall 12 along the front end edge of the left side wall 12. At this time, as shown in FIGS. 6 and 7, the first dew proof pipe 77 is located slightly rearward of the front edge of the left side wall 12 and is in contact with the inside of the outer box 17. Thereafter, when the first dew proof pipe 77 reaches the height position of the ceiling wall 14, the first dew prevention pipe 77 is bent rightward and becomes horizontal and enters the front end portion of the ceiling wall 14.

  The first dew-proof pipe 77 extends to the right side wall 13 along the front edge of the ceiling wall 14 along the front edge of the ceiling wall 14. Also in this case, the first dew-proof pipe 77 is located slightly behind the front edge of the ceiling wall 14. Thereafter, the first dew-proof pipe 77 is bent downward and becomes vertical and enters the front end portion of the right side wall 13. The first dew proof pipe 77 linearly extends downward in the front end portion of the right side wall 13 along the front end edge portion of the right side wall 13. Also at this time, as in the case of the left side wall 12, the first dew proof pipe 77 is located slightly behind the front edge of the right side wall 13 and is in contact with the inside of the outer box 17.

  When the first dew-proof pipe 77 reaches the vicinity of the bottom wall 15, the first dew-proof pipe 77 is bent backward and becomes horizontal, and extends rearward along the lower edge of the right side wall 13 in the lower end portion of the right side wall 13. Then, the first dew proof pipe 77 goes out of the right side wall 13 from the lower rear end of the right side wall 13 and enters the machine room 42. The downstream end of the first dew proof pipe 77 that enters the machine room 42 is connected to the upstream end of the second dew proof pipe 78 in the machine room 42.

  The second dew-proof pipe 78 enters the inside of the lower end of the right-side wall 13 from the lower rear end portion of the right-side wall 13 and below the first dew-proof pipe 77. The second dew proof pipe 78 extends forward in the lower end portion of the right side wall 13 along the lower end edge of the right side wall 13 in parallel with the first dew proof pipe 77. Thereafter, the second dew-proof pipe 78 bends upward at the front end of the right side wall 13, that is, near the opening 111 of the heat insulation box 11 and on the front side of the first dew-proof pipe 77. Thereafter, the second dew-proof pipe 78 is located inside the front end of the right side wall 13 and in front of the first dew-proof pipe 77 along the front end edge of the right side wall 13 in parallel with the first dew-proof pipe 77. Extends upward. At this time, as shown in FIG. 6, the second dew proof pipe 78 is located at the front edge portion inside the front end of the right side wall 13 and is in contact with the inside of the outer box 17. FIG. 6 shows a cross section of the left side wall 12, but when viewed as a cross section of the right side wall 13, the configuration is symmetrical.

  When the second dew-proof pipe 78 reaches the height position of the upper horizontal frame member 20, it bends to the left and becomes horizontal and enters the upper horizontal frame member 20. The second dew-proof pipe 78 extends leftward inside the upper horizontal frame member 20, and then enters the front end of the left side wall 12 and bends downward. The second dew-proof pipe 78 extends downward in the front end portion of the left side wall 12 and along the front end edge of the left side wall 12 at the front side of the first dew-proof pipe 77. Also at this time, as shown in FIG. 6, the second dew proof pipe 78 is located at the front edge portion inside the front end of the left side wall 12 and is in contact with the inside of the outer box 17.

  When the second dew proof pipe 78 reaches the height position of the middle horizontal frame member 21, it bends to the right and enters the middle horizontal frame member 21. After that, the second dew-proof pipe 78 extends rightward inside the middle horizontal frame member 21, is folded before the right side wall 13, and is routed around the vertical frame member 23 on the way, and then left again. Enter the front end of the wall 12. Thereafter, the second dew-proof pipe 78 is bent downward and extends downward in the front end portion of the left side wall 12. When the second dew proof pipe 78 reaches the height position of the lower horizontal frame member 22, it bends to the right and enters the lower horizontal frame member 22. Thereafter, the second dew-proof pipe 78 extends rightward inside the lower horizontal frame member 22, is folded back before the right side wall 13, and then extends leftward inside the lower horizontal frame member 22. It enters the front end of the left side wall 12 again.

  Thereafter, the second dew-proof pipe 78 bends downward and extends downward along the front edge of the left side wall 12. When the second dew proof pipe 78 reaches the vicinity of the bottom wall 15, it bends to the right and enters the front end of the bottom wall 15. Thereafter, the second dew-proof pipe 78 extends rightward in the front end portion of the bottom wall 15, turns back in front of the right side wall 13, then extends leftward in the front end portion of the bottom wall 15, and again on the left side. Enter the front end of the wall 12. The second dew proof pipe 78 is located in the lower end portion of the left side wall 12 and below the first dew proof pipe 77 in parallel with the first dew proof pipe 77 along the lower end edge of the left side wall 12. Extending backwards. Thereafter, the second dewproof pipe 78 exits the left side wall 12 from the lower rear end of the left side wall 12 and enters the machine room 42. The downstream end of the second dew-proof pipe 78 that has entered the machine room 42 is connected to the upstream side of the dryer 79 in the machine room 42.

  According to this, at least one of the first dew-proof pipe 77 and the second dew-proof pipe 78 is provided around the entrances 301, 311, 321, 331, and 341 of the storage chambers 30, 31, 32, 33, and 34. Is provided. For this reason, the surroundings of the respective entrances 301, 311, 321, 331, 341 are heated to the dew point temperature or higher by the first dew prevention pipe 77 and the second dew prevention pipe 78. Thereby, it can suppress that dew generation arises around each entrance / exit 301, 311, 321, 331, 341 by the temperature difference of the inside of each store room 30, 31, 32, 33, 34 and the exterior. .

  Since the first dew prevention pipe 77 is provided on the upstream side of the refrigerant flow with respect to the second dew prevention pipe 78, the temperature is higher than that of the second dew prevention pipe 78. The first dew-proof pipe 77 passes through the inside of the front end of the left side wall 12, the ceiling wall 14, and the right side wall 13 of the heat insulating box 11 without passing through the frame members 20, 21, 22, 23, and the entire opening 111. It is provided so as to surround the perimeter. On the other hand, since the second dew prevention pipe 78 is provided downstream of the first dew prevention pipe 77 with respect to the refrigerant flow, the second dew prevention pipe 78 has a lower temperature than the first dew prevention pipe 77. The second dew-proof pipe 78 passes through the inside of the front end of the left side wall 12, the right side wall 13 and the bottom wall 15 and the inside of the frame members 20, 21, 22 and 23.

  As a result, the second dew-proof pipe 78 surrounds the entrance / exit of each storage room in the freezing temperature zone, that is, the entrance / exit 321 of the ice making chamber 32, the entrance / exit 331 of the upper freezing chamber 33, and the entrance / exit 341 of the lower freezing chamber 34. Surrounding. Further, the second dew prevention pipe 78 also surrounds the periphery of the entrance / exit 311 of the vegetable room 31 in the storage room in the refrigerated temperature zone. The second dew-proof pipe 78 has at least a part passing through the inside of the front ends of the left and right side walls 12 and 13 passing through the storage chambers 32, 33 and 45 in the freezing temperature zone. 77 is provided in front of the first dew-proof pipe 77. In the case of this embodiment, the second dew proof pipe 78 has all the portions extending in the vertical direction passing through the inside of the front ends of the left and right side walls 12, 13 and located on the front side of the first dew proof pipe 77. 77 in parallel.

  According to this, the surroundings of the respective entrances 321, 331, 341 of the storage chambers 32, 33, 341 in the freezing temperature zone that are easily affected by the heat inflow from the outside are the second temperature lower than that of the first dew prevention pipe 77. It is surrounded by a dew proof pipe 78. For this reason, the heat | fever which flows in into the storage rooms 32, 33, 34 of the freezing temperature zone from the 2nd dew prevention pipe 78 can be reduced. Thereby, the temperature rise of each store room 32, 33, 34 of the freezing temperature zone by heat inflow from a dew prevention pipe can be controlled, and the power consumption required for cooling can be reduced. As a result, the refrigerator 10 can obtain a high energy saving effect.

  Further, around the entrances 321, 331, and 341 of the storage chambers 32, 33, and 34 in the freezing temperature zone, the second dew prevention pipe 78 is arranged in the vertical direction inside the middle horizontal frame member 21 and the lower horizontal frame member 22. It is provided to be double. And inside the vertical frame member 23, the 2nd dew prevention pipe 78 is provided so that it may become double in the left-right direction. Further, around the entrances 321, 331, 341 of the storage chambers 32, 33, 34 in the freezing temperature zone, the first dew proof pipe 77 and the second dew proof pipe 78 are arranged in the front end portions of the left and right side walls 12, 13. It is provided so as to overlap in the direction.

  According to this, even if it is the comparatively low temperature 2nd dew-proof pipe 78, since the circumference | surroundings of each entrance / exit 321,331,341 can be fully heated, dew can be suppressed more effectively. . The surroundings of each of the entrances 321, 331, and 341 are different from the case of a single high temperature dew pipe, that is, only the periphery of the single dew pipe is locally heated to a high temperature. There is no. Therefore, since the surroundings of the respective entrances 321, 331, and 341 are uniformly warmed at a comparatively low temperature, it is possible to more effectively suppress dew while reducing the inflow of heat into the storage chambers 32, 33, and 34. Can do.

  The first dew proof pipe 77 is arranged so that the refrigerant flows from the left side wall 12 side to the right side wall 13 side. That is, the first dew-proof pipe 77 is arranged such that the upstream side left side wall 12 side has a higher temperature than the downstream side right side wall 13 side. On the other hand, the second dew prevention pipe 78 is arranged so that the refrigerant flows from the right side wall 13 side to the left side wall 12 side. That is, the second dew proof pipe 78 is arranged such that the upstream side right side wall 13 side is hotter than the downstream side left wall 12 side. Thus, the refrigerant flowing through the first dew-proof pipe 77 and the second dew-proof pipe 78 is reversed in the left and right side walls 12 and 13. According to this, it is possible to obtain an average without biasing the temperatures of the front end portions of the left and right side walls 12 and 13. Therefore, it is possible to more uniformly suppress the dew around the doorways 321, 331, and 341.

  And the 1st dew prevention pipe 77 which does not pass the inside of the frame members 20, 21, 22, and 23 is comprised with the iron pipe | tube made comparatively cheap. On the other hand, the second dew-proof pipe 78 passing through the inside of the frame members 20, 21, 22, 23 is composed of a copper tube having excellent corrosion resistance and thermal conductivity. That is, the first dew-proof pipe 77 with a relatively low risk of being exposed to water or the like is made of an inexpensive material, and the second dew-proof pipe 78 with a relatively high risk of being exposed to water or the like is expensive but has high corrosion resistance and heat. It is made of a material with excellent functionality such as conductivity. According to this, the first dew-proof pipe 77 and the second dew-proof pipe 78 as a whole can achieve cost reduction while ensuring necessary functions such as corrosion resistance and thermal conductivity. Note that the first dew-proof pipe 77 made of iron may have a function such as corrosion resistance by plating or painting.

(Second embodiment)
Next, a second embodiment will be described with reference to FIGS. In this 2nd embodiment, arrangement | positioning of the 1st dew prevention pipe 77 in the circumference | surroundings of the opening 111 of the heat insulation box 11 differs from the said 1st embodiment.
That is, in the second embodiment, the first dew proof pipe 80 corresponding to the first dew proof pipe 77 enters the inside of the lower rear end of the left side wall 12 from the machine room 42 as in the first embodiment. Then, the inside of the lower end portion of the left side wall 12 extends forward along the lower end edge portion of the left side wall 12. Thereafter, the first dew proof pipe 80 is bent upward near the front end of the left side wall 12, that is, in the vicinity of the opening 111 of the heat insulating box 11. The first dew proof pipe 80 extends vertically upward along the front end edge of the left side wall 12 inside the front end of the left side wall 12. At this time, the first dew-proof pipe 80 is located slightly rearward of the front edge of the left side wall 12 and is in contact with the inside of the outer box 17, as in FIG. 6 in the first embodiment.

  Thereafter, when the first dew proof pipe 80 reaches the height position of the upper horizontal frame member 20, the first dew proof pipe 80 advances while rising and ascending, and advances to the front edge of the left side wall 12 as shown in FIG. Extends towards. Also here, the first dew-proof pipe 80 is in contact with the inside of the outer box 17. When the first dew proof pipe 80 reaches the ceiling wall 14, it bends to the right and becomes horizontal and enters the front end of the ceiling wall 14. Thereafter, the first dew-proof pipe 80 extends inside the front end of the ceiling wall 14 to the right side wall 13 along the front end edge of the ceiling wall 14. In this case, the first dew proof pipe 80 is located in front of the first dew proof pipe 77 of the first embodiment in the front end portion of the ceiling wall 14.

  Thereafter, the first dew-proof pipe 80 is bent downward and becomes vertical and enters the front end portion of the right side wall 13. The first dew proof pipe 80 extends vertically downward along the front end edge of the right side wall 13 in the front end of the right side wall 13. Thereafter, when the upper horizontal frame member 20 reaches slightly above, it retracts while descending, and then extends vertically downward again. Here too, the first dew proof pipe 80 is in contact with the inner side of the outer case 17 in the same manner as the portion provided on the left side wall 12 shown in FIG. The first dew proof pipe 80 reaches the bottom wall 15 in the same manner as the first dew proof pipe 77 of the first embodiment, and then extends in the lower end portion of the right side wall 13 so It goes out of the right side wall 13 from the end and enters the machine room 42. The downstream end portion of the first dew prevention pipe 77 that enters the machine room 42 is connected to the upstream end portion of the second dew prevention pipe 78 in the machine chamber 42. The arrangement of the second dew-proof pipe 78 is the same as in the first embodiment.

  Here, a portion of the first dew proof pipe 80 that passes through the inside of the front end of the left and right side walls 12, 13 and is provided behind the second dew proof pipe 78 and parallel to the second dew proof pipe 78. Is a lower first dew-proof pipe 801, and a portion not parallel to the second dew-proof pipe 78 is an upper first dew-proof pipe 802. In this case, an inclined portion 803 that connects the lower first dew prevention pipe 801 and the upper first dew prevention pipe 802 is formed between the lower first dew prevention pipe 801 and the upper first dew prevention pipe 802. Has been.

  The lower first dew-proof pipe 801 is located on the side of the vegetable room 31 among the storage rooms 32, 33, and 34 in the freezing temperature zone and the storage room in the refrigeration temperature zone. The upper first dew-proof pipe 802 is located on three sides of the refrigerating room 30 in the refrigerating temperature zone, in this case, on the left and right sides and on the upper side. Then, as shown in FIG. 10, the upper first dew-proof pipe 802 is positioned in front of the front edge portion inside the front ends of the left and right side walls 12, 13, that is, the lower first dew-proof pipe 801.

  According to this, the upper first dew-proof pipe 802 is disposed at a position closer to the entrance / exit 301 of the refrigerator compartment 30. For this reason, the periphery of the entrance / exit 301 of the refrigerator compartment 30 can be efficiently heated by the upper side first dew-proof pipe 802. Therefore, the dew-proof performance of the entrance / exit 301 of the refrigerator compartment 30 by the 1st dew prevention pipe 80 can be improved, and the dew condensation around the entrance / exit 301 of the refrigerator compartment 30 can be suppressed more effectively.

In each of the above embodiments, the direction in which the refrigerant flows may be reversed for the first dew-proof pipes 77 and 79 and the second dew-proof pipe 78.
Further, the number of the frame members 20, 21, 22, 23 may be increased or decreased.

  According to the configuration of the embodiment described above, the refrigerator includes the first dew-proof pipe and the second dew-proof pipe. The first dew-proof pipe is provided so as to surround the entire opening of the heat insulating box through the left and right side walls and the inside of the front end of the ceiling wall without passing through the inside of the frame member. The second dew prevention pipe is provided on the downstream side of the first dew prevention pipe with respect to the flow of the refrigerant. The second dew-proof pipe passes through the inside of the frame member and the inside of the front end of the left and right side walls, and surrounds the entrance / exit of the storage room in the freezing temperature zone. The second dew-proof pipe is parallel to the first dew-proof pipe, with the part passing through the side of the storage room in the freezing temperature zone among the parts passing through the front end inside the left and right side walls in front of the first dew-proof pipe. It is provided as follows.

  According to this, in what suppresses the dew around the opening by the dew proof pipe through which the high-temperature refrigerant flows, the heat flowing from the dew proof pipe into the storage chamber can be reduced. Thereby, the power consumption required for cooling can be reduced by suppressing the temperature rise in the storage chamber, and as a result, the energy saving effect can be improved.

  Although several embodiments of the present invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and equivalents thereof.

  In the drawings, 10 is a refrigerator, 11 is a heat insulating box, 111 is an opening, 12 is a left side wall, 13 is a right side wall, 14 is a ceiling wall, 20 is an upper horizontal frame member (frame member), and 21 is a middle horizontal frame member ( Frame member), 22 is a lower horizontal frame member (frame member), 23 is a vertical frame member (frame member), 30 is a refrigeration room (a storage room in a refrigeration temperature zone), 301 is a refrigerator entrance, 31 is a vegetable room (refrigeration) (Temperature zone storage room), 311 is the entrance / exit of the vegetable room, 32 is the ice making room (freezing temperature zone storage room), 321 is the ice making room entrance / exit, 33 is the upper freezing room (freezing temperature zone storage room), 331 is Entrance and exit of the upper freezer compartment, 34 is the lower freezer compartment (storage room in the freezing temperature zone), 341 is the entrance and exit of the lower freezer compartment, 60 is the refrigeration cycle, 61 is a compressor, 62 is a condenser, 63 is a refrigerator for refrigeration ( , 64 is a refrigeration cooler (cooler), 77 and 80 are first dew-proof pipes, 78 It shows a second anti-dew pipe.

Claims (4)

An insulation box having an opening formed on the front surface and a plurality of storage chambers inside;
A frame member provided in the heat insulation box to partition the opening and form an entrance of the storage chamber;
A refrigeration cycle for generating cold air for cooling each storage room,
The plurality of storage rooms are composed of a storage room in a refrigeration temperature zone and a storage room in a refrigeration temperature zone,
The refrigeration cycle includes a compressor, a cooler, and a first dew-proof pipe and a second dew-proof pipe that flow the refrigerant pumped from the compressor to the cooler.
The first dew-proof pipe is provided so as to surround the opening through the left and right side walls of the heat insulation box and the inside of the front end of the ceiling wall without passing through the inside of the frame member,
The second dew proof pipe is on the downstream side of the first dew proof pipe with respect to the flow of the refrigerant, and stores at least the refrigeration temperature zone through the inside of the frame member and the inside of the front end of the left and right side walls. A portion passing through the inside of the front end of the left and right side walls and passing through the side of the storage compartment in the refrigeration temperature zone is on the front side of the first dew prevention pipe A refrigerator installed in parallel with the pipe.   The refrigerator according to claim 1, wherein a portion of the first dew-proof pipe that passes through the inside of the front end of the left and right side walls extends linearly in the vertical direction.   The portion of the first dew-proof pipe that passes through the inside of the front end of the left and right side walls and that is not parallel to the second dew-proof pipe is in front of the portion that is parallel to the second dew-proof pipe. The refrigerator according to claim 1, which is located.   The refrigerator according to any one of claims 1 to 3, wherein the first dew-proof pipe is made of iron, and the second dew-proof pipe is made of copper.

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