JP2018066545A - refrigerator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a refrigerator that can defrost an evaporator and heat a dew receiving tray with a simple configuration.SOLUTION: A refrigerator 10 includes a heat transfer plate 68 and a heating wire 69 serving as heating means extending in the vicinity of a dew receiving tray 60 from the vicinity of an evaporator 30. In a defrosting step, the heat radiated from the energized heating wire 69 is conducted to the evaporator 30 through the heat transfer plate 68 and an inner box 23. The dew receiving tray 60 is also heated by the heat transfer plate 68 and the energized heating wire 69, thereby inhibiting the defrosting water dropping on the dew receiving tray 60 from freezing.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a refrigerator that cools a storage room, and more particularly, to a refrigerator that has a mechanism for efficiently treating frost formation.

  A general refrigerator includes a refrigeration cycle apparatus, and an evaporator included in the refrigeration cycle apparatus includes a plurality of cooling fins arranged in parallel and a refrigerant pipe that contacts the cooling fins.

  When the air in the refrigerator is cooled by such an evaporator, the temperature of the cooling fin is about −30 ° C., so moisture contained in the air flowing between the cooling fins adheres to the surface of the cooling fin and becomes a solid frost. It becomes. Such a phenomenon is generally called frost formation.

  As this frosting progresses, the gaps between the cooling fins of the evaporator are occupied by frost, which hinders the circulation and heat exchange of cold air. In order to prevent this phenomenon, a defrosting operation is regularly performed. In the defrosting operation, the compressor and the blower fan of the refrigeration cycle are stopped, the defrosting heater disposed below the evaporator is energized, and the frost attached to the evaporator is melted by the heat generated from the defrosting heater. To remove.

  Further, defrost water generated by melting frost in the defrosting operation is temporarily stored in a dew tray disposed below the evaporator and then sent to the evaporating dish. In the evaporating dish, the defrost water is evaporated using heat generated from the condensing pipe and the compressor. By doing in this way, it is preventing that defrost water leaks outside from an evaporating dish. The structure of the dew tray and evaporating dish in a common refrigerator is described in Patent Document 1, for example.

JP 2002-147927 A

  However, in the refrigerator configured as described above, since the dew tray is provided in the immediate vicinity of the evaporator, the defrost water once flowing into the dew tray freezes, and the defrost water from the dew tray to the evaporating dish is excellent. There was a risk of not being transferred. In addition, when frost in the form of ice blocks from the evaporator falls on the dew tray, the ice blocks may hinder the flow of defrost water from the dew plate to the evaporating plate. In order to solve such a problem, if a dedicated heater for heating the dew pan is provided, the configuration of the refrigerator becomes complicated and the manufacturing cost may increase.

  This invention is made | formed in view of said situation, The place made into the objective is providing the refrigerator which can implement | achieve the defrost of an evaporator and the heating of a dew tray with a simple structure.

  The refrigerator of the present invention includes a compressor that compresses the refrigerant, a condenser that condenses the compressed refrigerant, expansion means that expands the condensed refrigerant, an evaporator that evaporates the expanded refrigerant, A refrigeration cycle for cooling the cool air blown into the storage room, a dew tray for storing defrost water generated by melting frost attached to the evaporator, the dew tray and the evaporator Heating means, and the heating means is formed from below the dew tray to the side of the evaporator.

  Further, in the refrigerator of the present invention, the storage chamber is formed inside a heat insulation box composed of an outer box, an inner box and a heat insulating material filled in a gap between the two, the evaporator and the dew tray are It is arranged inside the inner box, and the heating means is arranged outside the inner box.

  Further, in the refrigerator of the present invention, the storage chamber is formed inside the heat insulation box composed of an outer box, an inner box, and a heat insulating material filled in a gap between the two, and the refrigerant discharged from the evaporator And an accumulator into which the air flows. The accumulator is disposed in the gap between the inner box and the outer box.

  In the refrigerator of the present invention, the condenser includes a first meandering portion made of a refrigerant pipe meandering in the vertical direction and a refrigerant pipe made of meandering in the vertical direction behind the first meandering portion. And two meandering portions.

  In the refrigerator of the present invention, the condenser is disposed in a concave region in which the rear surface of the heat insulating box is recessed forward, and is covered from behind by a cover in which an opening is formed.

  The refrigerator of the present invention further includes a blower that blows air toward the condenser below the condenser.

  The refrigerator of the present invention includes a compressor that compresses the refrigerant, a condenser that condenses the compressed refrigerant, expansion means that expands the condensed refrigerant, an evaporator that evaporates the expanded refrigerant, A refrigeration cycle for cooling the cool air blown into the storage room, a dew tray for storing defrost water generated by melting frost attached to the evaporator, the dew tray and the evaporator Heating means, and the heating means is formed from below the dew tray to the side of the evaporator. Therefore, in the defrosting process for removing the frost on the evaporator, the frost is melted and removed by heating the evaporator with heating means, and at the same time, the molten water dripped on the dew tray is frozen by heating the dew tray. Can be prevented. Furthermore, in the defrosting process, since both the dew receiving tray and the evaporator can be heated by one heating means, the configuration of the defrosting device can be simplified.

  Further, in the refrigerator of the present invention, the storage chamber is formed inside a heat insulation box composed of an outer box, an inner box and a heat insulating material filled in a gap between the two, the evaporator and the dew tray are It is arranged inside the inner box, and the heating means is arranged outside the inner box. Therefore, the heat generated from the heating means can be favorably conducted to the evaporator and the dew tray through the inner box. Moreover, it is possible to prevent the heating means from being short-circuited by the defrosting water generated in the defrosting process by arranging the heating means that generates heat by energization outside the inner box.

  Further, in the refrigerator of the present invention, the storage chamber is formed inside the heat insulation box composed of an outer box, an inner box, and a heat insulating material filled in a gap between the two, and the refrigerant discharged from the evaporator And an accumulator into which the air flows. The accumulator is disposed in the gap between the inner box and the outer box. Therefore, since the accumulator is disposed outside the cooling chamber, frost formation on the accumulator is eliminated, so that the heat energy required for defrosting can be reduced by increasing the interval between defrosting strokes and shortening the defrosting stroke itself. Can be reduced.

  In the refrigerator of the present invention, the condenser includes a first meandering portion made of a refrigerant pipe meandering in the vertical direction and a refrigerant pipe made of meandering in the vertical direction behind the first meandering portion. And two meandering portions. Therefore, by constituting the condenser from the first meandering part and the second meandering part arranged in the front-rear direction, a large amount of heat of condensation by the condenser can be secured in a limited space.

  In the refrigerator of the present invention, the condenser is disposed in a concave region in which the rear surface of the heat insulating box is recessed forward, and is covered from behind by a cover in which an opening is formed. Therefore, by storing the condenser in the concave area, the amount of protrusion to the rear is reduced, and the design of the rear portion can be enhanced by covering the condenser with the cover from the rear.

  The refrigerator of the present invention further includes a blower that blows air toward the condenser below the condenser. Accordingly, by blowing the condensation from below with the blower, heat exchange between the refrigerant and the external air can be efficiently performed with the condenser.

It is a figure which shows the refrigerator which concerns on embodiment of this invention, (A) is the perspective view which looked at the refrigerator from the front, (B) is the perspective view which looked at the refrigerator from back. It is side sectional drawing which shows schematic structure of the refrigerator which concerns on embodiment of this invention. In the refrigerator which concerns on embodiment of this invention, it is a sectional side view which shows an evaporator and its peripheral part. It is a rear view which shows the refrigerator which concerns on embodiment of this invention. It is side sectional drawing which shows the rear part of the refrigerator which concerns on embodiment of this invention. It is an upper section showing a refrigerator concerning an embodiment of the present invention.

  Hereinafter, the refrigerator 10 which concerns on embodiment of this invention is demonstrated in detail based on drawing. In the following description, the respective directions of up, down, front, back, left, and right are used as appropriate. Left and right are left and right when the refrigerator 10 is viewed from the front.

  With reference to FIG. 1, schematic structure of the refrigerator 10 of this form is demonstrated. 1A is a perspective view of the refrigerator 10 viewed from the front, and FIG. 1B is a perspective view of the refrigerator 10 viewed from the rear.

  With reference to FIG. 1 (A), the refrigerator 10 is a comparatively small thing whose capacity | capacitance is about 100 liters, for example, arrange | positions it in a living room or a bedroom, and is used auxiliary. The refrigerator 10 has a heat insulation box 11, and a wine chamber 20 and a refrigerator compartment 21 are formed in the heat insulation box 11 from the top. The wine chamber 20 has a volume capable of storing a plurality of wines in a state where the wine to be stored is brought down, stores wine or food other than wine, and is cooled to 0 ° C. or higher and 20 ° C. or lower. The refrigerator compartment 21 stores beverages such as beer other than wine, foods, and the like, and is cooled to, for example, 0 ° C. or more and 10 ° C. or less.

  The front opening of the wine chamber 20 is closed by a heat-insulating drawer-type heat insulating door 12, and by pulling the heat-insulating door 12 forward, it is possible to take out the wine in a fallen state.

  The front opening of the refrigerator compartment 21 is closed with a drawer-type heat insulating door 13, and food and the like can be taken in and out from the front opening of the refrigerator compartment 21 by pulling out and opening the heat insulating door 13.

  In this embodiment, the upper surface of the refrigerator 10 is constituted by a transparent plate 14 made of a transparent member. The transparent plate 14 is made of glass or synthetic resin that closes the opening formed on the upper surface of the heat insulating box 11 from above and transmits visible light. Further, the heat insulating foam, which is a light shielding material, is not filled between the transparent plate material 14 and the wine chamber 20. Therefore, the wine stored in the wine chamber 20 through the transparent plate member 14 can be viewed from above.

  As shown in FIG. 1B, the rear surface side of the refrigerator 10 is covered with a cover 17 made of a steel plate, and a plurality of openings 18 are formed by opening an upper portion of the cover 17. A plurality of openings 16 are formed by opening the lower part of the. As will be described later, outside air for cooling the condenser and the like of the refrigeration cycle is taken in from the lower opening 16, and warm air heated by the condenser and the like is released from the upper opening 18 to the outside.

  With reference to the side sectional view of FIG. 2, the structure of the refrigerator 10 of this embodiment will be further described. The heat insulation box 11 which is the main body of the refrigerator 10 includes an outer box 24 made of a plate material such as a steel plate, an inner box 23 made of a synthetic resin plate disposed inside the outer box 24, and an outer box 24 and an inner box 23. And a heat insulating material 25 made of hard urethane or the like filled in a gap formed therebetween.

  An opening is formed on the upper surface of the inner box 23, and an opening is also formed on the upper surface of the outer box 24. These openings are closed from above by a transparent plate 14 or the like. In addition, the transparent plate material 33, the spacer frame portion 27, the transparent plate material 32, and the spacer frame portion 28 are disposed in the opening from below. The transparent plate members 32 and 33 are made of glass or transparent synthetic resin that transmits visible light. The spacer frame portions 27 and 28 are frame-shaped members made of a synthetic resin having a size equivalent to that of the transparent plate materials 32 and 33 in a plan view, and members for securing a gap between the transparent plate materials 32 and 33. It is. By securing a gap between the transparent plates 32 and 33, the air present in the gap functions as a heat insulating material, and the wine chamber 20 described above can be insulated from the outside atmosphere.

  A storage container 50 that is pulled out together with the heat insulating door 12 is arranged inside the wine chamber 20. A light emitting device (not shown) is disposed below the storage container 50. By illuminating the wine 54 from below with the light emitting device, the user can visually recognize the brand and the like of the wine 54 stored in the wine chamber 20 through the transparent plate 14 and the like.

  The storage room formed as the internal space of the inner box 23 is divided into an upper wine room 20 and a lower refrigerator room 21, and the wine room 20 and the refrigerator room 21 are partitioned by a heat insulating partition 38. Yes.

  In the refrigerator compartment 21, storage containers 51 and 52 that can be pulled out forward are arranged. Since the indoor temperature of the refrigerator compartment 21 is lower than that of the wine compartment 20, the storage containers 51 and 52 can store beverages such as beer and food.

  A blower chamber 41 and a cooling chamber 40 partitioned by partition plates 45 and 46 made of a synthetic resin plate are formed on the back side of each storage chamber described above. The cooling chamber 40 incorporates an evaporator 30 for cooling the cool air blown to each storage chamber.

  The evaporator 30 forms a vapor compression refrigeration cycle by being connected via a compressor 31, a condenser pipe 63 as a condenser, an expansion means (not shown) and a refrigerant pipe. Here, the compressor 31 compresses the refrigerant, the condenser pipe 63 condenses the compressed refrigerant, the expansion means expands the condensed refrigerant, and the evaporator 30 evaporates the expanded refrigerant. The operation of the vapor compression refrigeration cycle is controlled by a control device (not shown). In the blower chamber 41, the cool air that is cooled in the cooling chamber 40 and blown into each storage chamber once flows and functions as a blower passage.

  A blower 47 for blowing cool air cooled inside the cooling chamber 40 is attached to the partition plate 46 that divides the cooling chamber 40 forward. In addition, an outlet duct 42, an outlet 44, and a return outlet 43 are formed in the partition plate 45 that partitions the front of the blower chamber 41. Cold air is blown out from the blowout duct 42 toward the wine chamber 20, and cold air is blown out from the blowout port 44 toward the refrigerating chamber 21. The cold air that has cooled the refrigerator compartment 21 returns to the cooling chamber 40 from the return port 43. The cold air that has cooled the wine chamber 20 returns to the cooling chamber 40 via a return port (not shown).

  The operation of the refrigerator 10 having the above configuration is as follows. When the control device operates the compressor 31 based on the output of the temperature sensor that measures the temperature of each storage chamber, the evaporator 30 cools the air inside the cooling chamber 40. The cool air cooled inside the cooling chamber 40 is blown to each storage chamber by a blower 47 that rotates based on an instruction from the control device. Specifically, the cool air blown by the blower 47 is blown into the blower chamber 41 formed in front of the cooling chamber 40 and then blown into the wine chamber 20 via the blowout duct 42. The cold air that has cooled the wine chamber 20 returns to the cooling chamber 40 via a return port (not shown). A part of the cold air that has flowed into the blower chamber 41 is blown from the blower outlet 44 to the refrigerator compartment 21. The cold air that has cooled the refrigerator compartment 21 returns to the cooling chamber 40 via the return port 43. When the indoor temperature of each storage chamber reaches a predetermined temperature due to the circulation of cold air through each storage chamber through such a path, the control device stops the operation of the compressor 31 and the blower 47.

  With reference to FIG. 2, a storage area 64 that is a space sandwiched between the outer box 24 of the heat insulation box 11 and the cover 17 is formed behind the heat insulation box 11. In the storage area 64, a condenser pipe 63 bent into a meandering shape is arranged. A blower 62 is disposed below the condenser pipe 63 in the storage area 64. As described above, the opening 18 and the opening 16 are formed in the upper part and the lower part of the cover 17.

  Thus, by arranging the condenser pipe 63 in the storage area 64 covered with the cover 17, the condenser pipe 63 formed in a meandering shape does not appear in the appearance design, so that the design of the refrigerator 10 as a whole is improved. I can do it.

  With reference to FIG. 3 and FIG. 4, the structure of the evaporator 30 and its vicinity is explained in full detail. 3 is a side sectional view showing the evaporator 30 and the like, and FIG. 4 is a rear view showing the structure of the condenser pipe 63 and the like as viewed from the rear.

  Referring to FIG. 3, the evaporator 30 includes a heat dissipating fin 55 composed of a plurality of metal plates arranged in a stacking direction along the width direction of the refrigerator 10, and a heat dissipating fin 55 that passes through the heat dissipating fin 55. And a heat transfer tube 56 through which the gas flows. The heat transfer tubes 56 are arranged in parallel at the front end portion and the rear end portion of the radiating fins 55, and a plurality of stages are arranged along the vertical direction.

  The width of the radiating fin 55 in the front-rear direction is the same as or substantially the same as the width of the cooling chamber 40 in the front-rear direction. Therefore, the rear side of the heat radiating fin 55 is in contact with the front surface of the inner box 23 of the heat insulating box 11 or arranged in the immediate vicinity thereof, and the front side of the heat radiating fin 55 is in contact with the rear surface of the partition plate 46 or in the immediate vicinity thereof. Placed in.

  A dew tray 60 is formed by making the lower bottom portion of the cooling chamber 40 concave. In the dew tray 60, defrost water generated by melting frost attached to the evaporator 30 is temporarily stored. In addition, ice debris may fall from the evaporator 30 onto the dew tray 60. The defrosted water stored in the dew tray 60 is guided to the evaporating dish 61 through the drain pipe 71.

  In this embodiment, a heat transfer plate 68 and a heating wire 69 as heating means are disposed in the vicinity of the evaporator 30 and the dew tray 60. The heat transfer plate 68 is a plate-like or foil-like heat conductor made of a metal such as aluminum. The heat transfer plate 68 is in close contact with the rear surface of the inner box 23 of the heat insulating box 11. The heat transfer plate 68 is formed outside the cooling chamber 40 when viewed from the cooling chamber 40 side, and the heat transfer plate 68 is formed inside the heat insulating box 11 when viewed from the heat insulating box 11 side. Further, the heat transfer plate 68 extends continuously from a portion that extends in the vertical direction of the inner box 23 to partition the cooling chamber 40 to a portion that extends in the horizontal direction of the inner box 23 and constitutes the dew tray 60. Yes. The upper end of the heat transfer plate 68 is disposed above the upper end of the evaporator 30. Although not shown here, the left end of the heat transfer plate 68 extends to the left of the left end of the evaporator 30, and the right end of the heat transfer plate 68 is the evaporator. It extends to the right rather than the right end of 30. By doing in this way, the evaporator 30 can be heated entirely via the heat exchanger plate 68, and the defrosting of the evaporator 30 can be performed efficiently.

  The lower end of the heat transfer plate 68 extends forward from the dew tray 60. By doing in this way, the dew tray 60 can be heated entirely, it can suppress that the defrost water stored in the dew tray 60 freezes, and the ice block which fell to the dew tray 60 can be fuse | melted. The heat transfer plate 68 may be composed of a single metal foil or a plurality of metal foils.

  A heating wire 69 formed in a meandering shape is in contact with the main surface on the rear side of the heat transfer plate 68. The heating wire 69 is made of a conductor having high electrical resistance, and generates heat when energized. In the vertical direction, the position of the heat transfer tube 56 of the evaporator 30 coincides with the position of the heating wire 69. That is, at the front view, at least a part of the heat transfer tube 56 and the heating wire 69 coincide in the vertical direction. By doing in this way, the frost formation of the heat exchanger tube 56 can be efficiently defrosted with the heat emitted from the heating wire 69. Further, as will be described later, the heat generated from the heating wire 69 during the defrosting operation is conducted to the evaporator 30 and the dew receiving tray 60 through the inner box 23 after spreading over the entire heat transfer plate 68.

  On the bottom surface of the dew receiving tray 60, a drain pipe 71 for guiding the defrost water temporarily stored in the dew receiving tray 60 to the evaporating tray 61 is disposed. The drain pipe 71 is a tubular member that penetrates the heat insulating box 11 in the lower part of the dew receiving tray 60, and defrosted water is transferred from the dew tray 60 to the evaporating dish 61 via the drain pipe 71.

  An evaporating dish 61 is disposed below the dew receiving tray 60. The evaporating dish 61 is a dish-shaped container having a capacity that can receive defrosted water flowing from the dew receiving tray 60, and is housed in the machine chamber 34 together with the compressor 31 and the like as shown in FIG. The evaporating dish 61 is disposed in the vicinity of the compressor 31 and the condenser, and heat generated from the compressor 31 and the condenser is conducted to the evaporating dish 61, so that the defrost water stored in the evaporating dish 61 evaporates. Released to the outside.

  A defrosting process using the heat transfer plate 68 and the heating wire 69 as the heating means will be described. If the cooling of the cool air by the evaporator 30 is continued as described above, frosting proceeds in the evaporator 30 and the efficiency of heat exchange and blowing is reduced due to the frosting. A frost process is in progress. That is, based on the output of a timer indicating that a certain time has elapsed, the control device stops the compressor 31 and the blower 47 of the refrigeration cycle and starts the defrosting process.

  In the defrosting process, the heating wire 69 is energized to generate heat based on an instruction from the control device. Then, the heat generated from the heating wire 69 spreads around by the heat transfer plate 68 and then is conducted to the radiation fins 55 of the evaporator 30 through the inner box 23. The inner box 23 has a thickness of about 1 mm to 2 mm, and the rear side surface of the radiation fin 55 is in contact with the inner box 23. Therefore, the heat generated from the heating wire 69 is conducted well to the evaporator 30 through the heat transfer plate 68 and the inner box 23, and the frost adhering to the evaporator 30 is effectively and in a short time. Can be melted. The defrost water generated by the defrosting is temporarily stored in the dew receiving tray 60 formed below the evaporator 30 and then flows into the evaporating tray 61 and evaporates.

  Further, as described above, the heat transfer plate 68 and the heating wire 69 are formed up to the lower surface of the dew tray 60. Therefore, the defrost water stored in the dew tray 60 is prevented from freezing by being heated by the heat transfer plate 68 and the heating wire 69. Further, even if the frost in the form of ice blocks falls on the dew tray 60, the ice blocks are melted by the heat generated from the heating wire 69 to become defrost water, and are led to the evaporating dish 61. Therefore, the drain pipe 71 is also prevented from being blocked by this ice block-like frost.

  When the defrosting process is completed, the control device stops the supply of current to the heating wire 69 and starts the compressor 31 of the refrigeration cycle so that the inside temperature of each storage chamber is in a constant temperature range. Here, the control device continues the defrosting process until a predetermined time elapses or until the room temperature of the cooling chamber 40 reaches a predetermined temperature.

  As described above, in this embodiment, the frost adhering to the evaporator 30 is melted by the heat generated from the heating wire 69 disposed in the immediate vicinity of the evaporator 30, so that the defrosting can be performed efficiently. Moreover, since it is not necessary to arrange | position a defrost heater under the evaporator 30, the magnitude | size of the up-down direction of the evaporator 30 can be ensured, and the heat capacity of the evaporator 30 can be enlarged. Furthermore, by eliminating the defrosting heater, the flow of cool air below the evaporator 30 can be improved, and the overall configuration of the apparatus can be simplified.

  Further, as shown in FIG. 3, in this embodiment, the accumulator 59 is not disposed in the cooling chamber 40 but is disposed in the heat insulating box 11, that is, in the heat insulating material 25. By doing in this way, since accumulator 59 does not contact cold air, it can control that accumulator 59 forms frost. Furthermore, since it is not necessary to secure a space for storing the accumulator 59 in the cooling chamber 40, space saving of the cooling chamber 40 can be realized. Further, the accumulator 59 is disposed in the vicinity of the upper side of the evaporator 30. By doing so, the accumulator 59 and the evaporator 30 can be brought close to each other.

  As described above, the condenser pipe 63 as a condenser is disposed behind the heat insulating box 11. As shown in FIG. 4, the capacitor pipe 63 has a meandering shape that meanders in the vertical direction, thereby ensuring a large amount of heat to be exchanged by increasing the pipe length. Referring to FIG. 3, the capacitor pipe 63 includes a first meandering portion 66 formed in a meandering shape at the front and a second meandering portion 67 formed in a meandering shape at the rear.

  The first meandering portion 66 and the second meandering portion 67 are mechanically supported by a metal support wire 65 extending in the vertical direction. Here, in order to clarify the configuration, the first meandering portion 66 and the second meandering portion 67 are shown separated in the front-rear direction, but in reality, the first meandering portion 66 and the second meandering portion 67 are in close contact with each other in the front-rear direction. May be.

  In this way, by configuring the capacitor pipe 63 from a plurality of meandering portions, the capacitor pipe 63 having a sufficient length can be formed in a limited space, and a sufficient amount of heat can be ensured. In particular, since the refrigerator 10 of this embodiment has a small capacity to be used supplementarily, the height of the refrigerator 10 is limited. However, by configuring the condenser pipe 63 as described above, a sufficient amount of heat is ensured. be able to.

  Here, a part of the capacitor pipe 63 may be routed to a front opening formed in front of the heat insulating box 11 shown in FIG. By doing in this way, while ensuring further large calorie | heat amount emitted from the capacitor | condenser pipe 63, the periphery of the opening part of the heat insulation box 11 can be warmed, and dew condensation can be suppressed.

  With reference to FIG. 5 and FIG. 6, the structure etc. in which the capacitor pipe 63 is accommodated will be described. FIG. 5 is a side sectional view showing the rear side of the refrigerator 10, and FIG. 6 is an upper sectional view showing the rear part of the refrigerator 10.

  Referring to FIG. 5, the capacitor pipe 63 is stored in a storage area 64 formed on the rear side of the heat insulating box 11. The storage area 64 is defined as a space sandwiched between the outer box 24 and the cover 17 of the heat insulating box 11. Since the condenser pipe 63 having a meandering shape is covered with the cover 17 from the rear and does not appear on the appearance, the design of the rear surface portion of the refrigerator 10 can be improved.

  The cover 17 is a plate-like member made of a steel plate, and a plurality of openings 18 are formed by opening an upper portion thereof. A plurality of openings 18 are formed in a matrix in the upper part of the capacitor pipe 63 or above it. Thereby, the warm air exchanged with the condenser pipe 63 can be efficiently discharged to the outside via the opening 18.

  An opening 16 is formed by opening a lower portion of the cover 17. A plurality of openings 16 are formed in a matrix form below the capacitor pipe 63. Thereby, the low temperature external air taken in from the opening part 16 can be supplied to the condenser pipe 63 from below, and the heat exchange of the condenser pipe 63 with the external air can be promoted.

  A blower 62 is disposed below the condenser pipe 63. The blower 62 promotes heat exchange between the refrigerant in the condenser pipe 63 and the outside by blowing air toward the condenser pipe 63.

  With reference to FIG. 6, the recessed area | region 58 is formed by denting the rear surface of the heat insulation box 11 toward the front. The concave area 58 extends in a duct shape in the vertical direction, and the concave area 58 is covered with the cover 17 from the rear, so that a storage area 64 for storing the capacitor pipe 63 is formed. All or part of the capacitor pipe 63 is accommodated in the concave region 58. Moreover, the capacitor pipe 63 is attached to the heat insulation box 11 via a fixture. Further, the rear end portion of the heat insulating box 11 forming the concave region 58 is filled with the heat insulating material 25 to ensure sufficient strength.

  With reference to FIG. 5, a description will be given of matters in which heat is exchanged between the refrigerant and the external atmosphere in the condenser pipe 63 when the refrigeration cycle is operated. When the compressor 31 of the refrigeration cycle is operated, the high-temperature refrigerant compressed by the compressor 31 is introduced into the condenser pipe 63 that is a condenser. At the same time, the air blown upward by the blower 62 is blown to the condenser pipe 63. The flow path of the air for cooling the condenser pipe 63 will be described in detail. First, the low temperature outside air is taken into the machine room 34 of the refrigerator 10 through the opening 16 formed in the lower part of the cover 17. Furthermore, outside air also enters the machine room 34 from below the refrigerator 10. The air that has entered the machine chamber 34 is sucked toward the blower 62 while being in contact with the compressor 31 and the evaporating dish 61. At this time, the defrost water stored in the evaporating dish 61 is heated and evaporated.

  The air sucked into the blower 62 is blown upward by the blowing action, and rises inside the duct-shaped storage area 64 while absorbing heat from the meandering capacitor pipe 63. The air heated to a high temperature by cooling the condenser pipe 63 further rises in the storage area 64 and is discharged from the opening 18 to the outside. Furthermore, since the cover 17 made of a good heat conductor is close to or in contact with the capacitor pipe 63, a part of the heat generated from the capacitor pipe 63 is discharged to the outside through the cover 17 having a large area. be able to.

  As described above, the air taken in from the opening 16 is circulated through the storage area 64 and then discharged to the outside from the opening 18, thereby cooling the condenser pipe 63 stored in the storage area 64 well. The condensation efficiency can be increased, and the defrost water can be favorably evaporated by the evaporating dish 61.

  As mentioned above, although embodiment of this invention was shown, this invention is not limited to the said embodiment.

DESCRIPTION OF SYMBOLS 10 Refrigerator 11 Heat insulation box 12 Heat insulation door 13 Heat insulation door 14 Transparent plate material 16 Opening part 17 Cover 18 Opening part 20 Wine room 21 Refrigeration room 23 Inner box 24 Outer box 25 Thermal insulation material 27 Spacer frame part 28 Spacer frame part 30 Evaporator 31 Compressor 32 Transparent plate material 33 Transparent plate material 34 Machine room 38 Heat insulation partition 40 Cooling chamber 41 Blowing chamber 42 Blowing duct 43 Return port 44 Blowing port 45 Partition plate 46 Partition plate 47 Blower 50 Storage container 51 Storage container 54 Wine 55 Radiation fin 56 Heat transfer pipe 58 Concave area 59 Accumulator 60 Dew tray 61 Evaporation dish 62 Blower 63 Condenser pipe 64 Storage area 65 Support wire 66 First meander part 67 Second meander part 68 Heat transfer plate 69 Heating wire 71 Drain pipe

Claims (6)

A storage chamber having a compressor for compressing the refrigerant, a condenser for condensing the compressed refrigerant, an expansion means for expanding the condensed refrigerant, and an evaporator for evaporating the expanded refrigerant. A refrigeration cycle for cooling the cool air blown into
A dew tray in which defrost water generated by melting frost attached to the evaporator is stored;
Heating means for heating the dew tray and the evaporator,
The refrigerator, wherein the heating means is formed from below the dew tray to the side of the evaporator. The storage chamber is formed inside a heat insulation box composed of an outer box, an inner box and a heat insulating material filled in a gap between the two,
The evaporator and the dew tray are arranged inside the inner box,
The refrigerator according to claim 1, wherein the heating unit is disposed outside the inner box. The storage chamber is formed inside a heat insulation box composed of an outer box, an inner box and a heat insulating material filled in a gap between the two,
An accumulator into which the refrigerant discharged from the evaporator flows,
The refrigerator according to claim 1 or 2, wherein the accumulator is disposed in the gap between the inner box and the outer box.   The condenser has a first meandering portion composed of a refrigerant pipe meandering in the vertical direction and a second meandering portion consisting of a refrigerant pipe meandering in the vertical direction on the rear side of the first meandering portion. The refrigerator in any one of Claims 1-3 characterized by these.   2. The refrigerator according to claim 1, wherein the condenser is disposed in a concave region in which a rear surface of the heat insulating box is recessed forward, and is covered from behind by a cover in which an opening is formed.   The refrigerator according to any one of claims 1 to 5, further comprising a blower that blows air toward the condenser below the condenser.

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