JP2005156105A - Refrigerator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enhance reliability in drainage of defrosting water from an evaporator for a refrigerating chamber while attaining power saving in a refrigerator having evaporators in the refrigerating chamber and a freezing chamber respectively. <P>SOLUTION: In this refrigerator, a radiating pipe 13 constituting a part of a condenser for condensing a refrigerant compressed by a compressor is disposed on the heat insulating foam material 5 side of a refrigerator back face outer plate, and a turn part 13a is provided vertically at the lateral center part. An inlet of a drain hose 9 is positioned near the turn part 13a. Heat of the radiating pipe 13 can thereby be effectively transmitted to the drain hose 9, so that frosting and freezing can be prevented without using a heater or the like, and defrosting reliability can be improved. Further, power saving can be attained because of not using an electric heating source such as a heater. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  TECHNICAL FIELD The present invention relates to a structure for discharging defrost water of a refrigerator for a refrigerator compartment in a refrigerator having a refrigerator compartment and a freezer compartment to the outside.

In the conventional refrigerator, the defrost water drainage path of the evaporator for the refrigerator compartment falls to the defrost water tray located below the evaporator for the refrigerator compartment, flows into the drain hose from the outlet, and the upper stage of the compressor It is discharged to the evaporating dish provided in However, the drain hose provided inside the foam heat insulating material has a problem that frost is formed in the drain hose due to cold air from inside the freezer compartment. Therefore, defrosting in the drain hose is performed by providing the drain hose as far as possible inside the foam heat insulating material, and in a large-sized cold-cooled refrigerator, by providing a heater around the drain hose. (For example, see Patent Document 1)
5 and 6 show a conventional refrigerator described in Patent Document 1. FIG. As shown in FIG. 5 and FIG. 6, the refrigerating room 100 and the freezing room 101 are divided into upper and lower sections, a cabinet 102, an inner box 103 that forms the refrigerating room 100, the cabinet 102 and the inner box 103, A heat insulating material 104 filled in between, a refrigerating room evaporator 105 disposed on the back surface of the refrigerating room 100, a freezer room evaporator 106 disposed on the back surface of the freezing room 101, The frost water receiving tray 107, a drain hose 108 embedded in the heat insulating material 104, a heater 109 covering the drain hose 108, an evaporating tray 110, a compressor 111, a heat radiating pipe 112, and a control board 113 are included. Yes.
JP-A-11-237164

  However, in the conventional configuration, when the outside air temperature is low, sufficient heat transfer cannot be obtained from the outside air, which causes frost formation inside the drain hose. Therefore, in recent years, a drain hose made of a good thermal conductor such as aluminum that transmits the heat using the heat of the defrost heater provided in the vicinity of the evaporator for the cold room is installed to prevent frost formation in the drain hose. doing. However, the hose made of a good thermal conductor has a drawback that it is expensive and increases in weight. In addition, in a large-sized cold-cooled refrigerator, the use of a heater that covers the drain hose has a problem in that it consumes more power than in the past and is not addressed in power saving.

  An object of the present invention is to solve the above-described conventional problems, and to provide a refrigerator that is inexpensive and saves power.

  In order to solve the above-described conventional problems, the refrigerator of the present invention is a refrigeration for cooling a heat insulating box, a compressor, a condenser, and a refrigerator compartment in which a foam heat insulating material is filled between an inner box and an outer box. An evaporator for the room, an evaporator for the freezer for cooling the freezer, a control board for controlling the cooling in the refrigerator, and a drain hose for draining the defrost water of the evaporator for the refrigerator to the outside of the refrigerator In the refrigerator in which the refrigerator compartment formed in the heat insulation box is disposed above the freezer compartment, a heat dissipating pipe constituting a part of the condenser is disposed on the foam insulating material side of the refrigerator outer skin, and a drain hose. Is disposed in the foam heat insulating material, and the heat radiating pipe is disposed in the vicinity of the inlet portion of the drain hose.

  Thereby, the heat from the heat radiating pipe constituting a part of the condenser is transmitted to the drain hose, and frost formation in the drain hose can be prevented.

  Since the refrigerator of the present invention can prevent frosting and freezing on the drain hose without using a heater, it can save power.

  The invention according to claim 1 is a heat insulating box body in which a foam heat insulating material is filled between an inner box and an outer box, a compressor, a condenser, an evaporator for a refrigerator compartment for cooling the refrigerator compartment, A freezer compartment evaporator for cooling the chamber, a control board for controlling the cooling in the cabinet, and a drain hose for draining the defrost water of the evaporator for the refrigerator compartment outside the cabinet, In the refrigerator in which the refrigerator compartment formed above is disposed above the freezer compartment, the heat dissipating pipe constituting a part of the condenser is disposed on the foam heat insulating material side of the refrigerator back outer plate, and the drain hose is disposed in the foam heat insulating material. In addition, by disposing the heat radiating pipe in the vicinity of the drain hose inlet, the amount of heat transfer into the drain hose increases, frost formation is prevented, and a heater is not used, so that power saving can be achieved.

  The invention according to claim 2 is the invention according to claim 1, wherein the turn part is provided while increasing the heat dissipating capability by providing a turn part to the heat radiating pipe and bringing the turn part and the inlet part of the drain hose close to each other. By effectively increasing the heat transfer to the drain hose, frost formation and freezing can be prevented. In addition, since no heater is used, power saving can be achieved. Further, due to the improvement of the heat dissipation capability of the condenser, the operation rate of the refrigerator is reduced, and power saving can be achieved.

  The invention according to claim 3 is the invention according to claim 1, wherein the drain hose is arranged at the rear end of the refrigerator, so that the drain hose suppresses cooling from the freezer compartment as compared to the central part. Therefore, frosting and freezing in the drain hose can be prevented efficiently.

  The invention according to claim 4 is the invention according to any one of claims 1 to 3, wherein a spacer is provided between the inner box and the drain hose, so that the drain hose is securely placed on the refrigerator back outer plate side. Positioning can be performed, there is no variation during assembly, and the influence of cooling from the freezer compartment can be minimized.

  According to a fifth aspect of the present invention, in the invention according to any one of the first to fourth aspects, the defrosting of the refrigerating room evaporator is performed when no refrigerant is allowed to flow through the evaporator without using a heater. Since it is off-cycle defrost and the evaporator defrost does not use a heater, the area around the drain hose that drains defrost water is likely to be cooler than the heater. By providing the heat dissipating pipe in the vicinity of the inlet portion of the drain hose, frosting and freezing in the drain hose can be prevented without using a heater. Furthermore, when applied to an off-cycle defrosted one, there is no frosting due to rapid defrosting, no falling of ice clumps, clogging in the drain hose hardly occurs, and drainage reliability is improved.

  The invention according to claim 6 is the invention according to any one of claims 1 to 5, wherein the drain hose is arranged in the projection surface of the control board for controlling the cooling in the cabinet, thereby Effective use of heat generation becomes possible, and the temperature in the drain hose rises and frost formation can be reliably prevented.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. The present invention is not limited to the embodiments.

(Embodiment 1)
FIG. 1 shows a cross-sectional view of the refrigerator according to Embodiment 1 of the present invention. FIG. 2 shows a rear view of the refrigerator in the same embodiment.

  In FIG. 1, the refrigerator compartment 1 and the freezer compartment 2 are divided into upper and lower parts, and the refrigerator compartment 1 is disposed above the freezer compartment 2. A heat insulating material 5 is filled and foamed between the cabinet 3 and the inner box 4. A refrigerator 6 for the refrigerator compartment is disposed on the back of the refrigerator compartment 1, and the evaporator for the refrigerator compartment is disposed on the back of the refrigerator compartment 2. A vessel 7 is provided. The defrosted water receiving tray 8 below the evaporator 6 for the refrigerator compartment is connected to the drain hose 9, and the outlet side of the drain hose 9 faces the evaporating tray 11 provided in the upper portion of the compressor 12. In addition, the drain hose 9 is arrange | positioned at the refrigerator back outer plate side in the foam heat insulating material 5. FIG.

  Moreover, the heat radiating pipe 13 which constitutes a part of the condenser that condenses the refrigerant compressed by the compressor 12 is disposed on the foam heat insulating material 5 side of the refrigerator back outer plate, and is turned in the vertical direction at the substantially central portion on the left and right. It has a portion 13a, and the inlet of the drain hose 9 is positioned in the vicinity of the turn portion 13a.

  Moreover, the spacer 10 is provided between the drain hose 9 and the inner box 4, and the positioning to the refrigerator back outer plate side in the foam heat insulating material 5 is strengthened.

  Further, the control board 14 for controlling the cooling in the cabinet is housed in a recess (not shown) on the refrigerator back outer plate, and the drain hose 9 is disposed so as to pass through a substantially central portion in the projection plane of the control board 14. ing.

  Moreover, the defrosting of the evaporator 6 for refrigerator compartments is made into the off cycle defrost system performed when a refrigerant | coolant is not poured through an evaporator without using a heater.

  About the refrigerator comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  The refrigerator compartment 1 and the freezer compartment 2 are controlled to be cooled to predetermined temperatures by the cooling action of the refrigerator compartment evaporator 6 and the refrigerator compartment evaporator 7, respectively. The operation time of the compressor is counted by the microcomputer in the control board 14, and defrosting (defrosting) is performed every predetermined time. The defrosted water from the evaporator 6 for the refrigerator compartment is stored in the evaporator tray 11 provided in the upper part of the compressor 12 through the drain hose 9 from the defrost water receptacle 8 below the evaporator 6 for the refrigerator compartment. Evaporates using the heat of

  Here, the heat radiating pipe 13 that constitutes a part of the condenser that condenses the refrigerant compressed by the compressor 12 is disposed on the foam heat insulating material 5 side of the refrigerator back outer plate, and in the vertical direction of the substantially right and left central part. Since it has the turn part 13a and the inlet of the drain hose 9 is located in the vicinity of the turn part 13a, the heat of the heat radiating pipe 13 can be effectively transmitted to the drain hose 9, so that a heater or the like is not used. Defrosting and freezing can be prevented and defrosting reliability is improved. In addition, since an electric heating source such as a heater is not used, power saving can be achieved.

  In addition, the heat dissipating pipe 13 is provided with a turn part 13a, and the turn part 13a and the inlet part of the drain hose 9 are brought close to each other, so that the heat of the turn part 13a is made into a turn shape while improving the heat dissipating ability. It can be used more effectively, and frost formation and freezing can be reliably prevented by efficiently increasing the heat transfer to the drain hose.

  Moreover, since the spacer 10 is provided between the drain hose 9 and the inner box 4 and the positioning to the refrigerator back outer plate side in the foam heat insulating material 5 is strengthened, the drain hose 9 is reliably connected to the refrigerator rear outer plate. It can be positioned to the side, there is no variation during assembly, and the influence of cooling from the freezer compartment 2 can be minimized.

  In addition, the defrosting of the evaporator 6 for the refrigerator compartment is an off-cycle defrost method that is performed when the refrigerant is not supplied to the evaporator without using a heater, and the heater is not used when the evaporator is defrosted. The drain hose 9 around which the defrost water is drained tends to be lower in temperature than that using a heater, but a heater is used by providing a heat dissipating pipe arranged on the outer plate of the refrigerator back near the inlet of the drain hose. It is possible to prevent frost and freezing in the drain hose. Furthermore, when applied to an off-cycle defrosted one, there is no frosting due to rapid defrosting, no falling of ice clumps, clogging in the drain hose hardly occurs, and drainage reliability is improved. Further, by adopting the off-cycle defrost method, the moisture of defrost water can be reduced into the refrigerator compartment 1, the inside of the refrigerator compartment 1 can be made highly humid, and the stored food can be prevented from drying.

  Further, the control board 14 for controlling the cooling in the cabinet is housed in a concave portion (not shown) of the refrigerator rear outer plate, and the drain hose 9 is disposed so as to pass through a substantially central portion in the projection plane of the control board 14. Therefore, the heat generation of the control board 14 can be effectively used, the temperature in the drain hose 9 is further increased, and frost formation can be reliably prevented.

  In addition, the refrigerator 6 for refrigerator compartments may be a direct cooling type plate-like thing. In this case, there is no need for a refrigerator cooling fan, and the cost can be reduced.

(Embodiment 2)
FIG. 3 shows a rear view of the refrigerator in the second embodiment of the present invention. FIG. 4 shows a top view of the embodiment. Note that the description of the same configuration as that of Embodiment 1 is omitted.

  3 and 4, the drain hose 15 is disposed on the side of the foam heat insulating material 5 in the vicinity of the end part of the outer plate of the rear surface of the refrigerator, and forms a part of a condenser that condenses the refrigerant compressed by the compressor 12. 13 is provided in the vicinity of the drain hose 15. And the evaporating dish 11 provided in the upper part of the compressor 12 and the compressor 12 is also shifted and arrange | positioned from the center in the side in which the drain hose 15 was arrange | positioned.

  With the above configuration, since the drain hose 15 can suppress cooling from the freezer compartment 2 rather than being arranged in the center, frosting and freezing in the drain hose 15 can be efficiently prevented. Further, by arranging the drain hose 15 at the rear end of the refrigerator, a synergistic effect with the heat insulating material on the side wall surface can suppress the influence of cold heat on the drain hose 15 compared to the case where it is arranged at the center, and the heat radiating pipe. The heat of 13 can be used effectively.

  As described above, the refrigerator according to the present invention increases the amount of heat transfer in the drain hose, and can save power by not using a heater and by improving the heat exchange efficiency of the heat radiating pipe. It can also be applied to applications such as Peltier refrigerators.

Sectional drawing of the refrigerator in Embodiment 1 of this invention The rear view of the refrigerator in Embodiment 1 of this invention The rear view of the refrigerator in Embodiment 2 of this invention Top view of the refrigerator in Embodiment 2 of the present invention Cross-sectional view of a conventional refrigerator Rear view of conventional refrigerator

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Refrigerating room 2 Freezing room 3 Cabinet 4 Inner box 5 Foam insulation 6 Refrigerating room evaporator 7 Freezing room evaporator 8 Defrost water tray 9, 15 Drain hose 10 Spacer 11 Evaporating dish 12 Compressor 13 Radiation pipe 13a Turn Part 14 Control board

Claims (6)

For heat insulation box filled with foam insulation between inner box and outer box, compressor, condenser, refrigerator for refrigerating room for cooling refrigerator compartment, and freezer room for cooling freezer room The refrigerator having a evaporator, a control board for controlling cooling in the refrigerator, and a drain hose for draining defrosted water of the evaporator for the refrigerator to the outside of the refrigerator. In the refrigerator disposed above the chamber, the heat radiating pipe constituting a part of the condenser is disposed on the foam heat insulating material side of the refrigerator rear outer plate, the drain hose is disposed in the foam heat insulating material, and the heat radiating pipe is disposed on the drain. A refrigerator characterized by being arranged in the vicinity of an inlet portion of a hose. 2. The refrigerator according to claim 1, wherein the heat radiating pipe has a turn portion, and the turn portion and an inlet portion of the drain hose are brought close to each other. The refrigerator according to claim 1, wherein an inlet portion of the drain hose is provided in the vicinity of the rear end portion of the refrigerator. The refrigerator according to any one of claims 1 to 3, wherein a spacer is provided between the inner box and the drain hose. The defrosting of the evaporator for a refrigerator compartment is made into the off cycle defrost performed when a refrigerant | coolant is not flowed into an evaporator without using a heater, The any one of Claims 1-4 characterized by the above-mentioned. refrigerator. The refrigerator according to any one of claims 1 to 5, wherein the drain hose is arranged in a projection plane of a control board that controls cooling in the cabinet.

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