JP2007078264A - Refrigerator-freezer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve reliability in draining defrost water from an evaporator for a refrigerating compartment while saving power in a refrigerator having the evaporators respectively in the refrigerating compartment and a freezing compartment. <P>SOLUTION: In this refrigerator-freezer comprising a heat insulating housing formed by filling a foam heat insulating material 5 between an inner case 4 and an outer case 3, a refrigerating temperature zone compartment 1a formed in the heat insulating housing, a freezing temperature zone compartment 2c formed in the heat insulating housing at a lower portion with respect to the refrigerating temperature zone compartment 1a, the evaporator 6 of the refrigerating compartment for cooling the refrigerating temperature zone compartment 1a, the evaporator 7 of the freezing compartment for cooling the freezing temperature zone compartment 2c, a drain hose 9 for refrigerating buried in the foam heat insulating material 5 for draining the defrost water of the evaporator 6 for the refrigerating compartment to the outside of the refrigerator, and a radiating pipe 15 mounted at a form heat insulating material 5 side of a back plate 3a, the radiating pipe 15 is mounted near the drain hose 9 for refrigerating mounted in the foam heat insulating material 5 at the back of the freezing temperature zone compartment 2c. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

 The present invention relates to a refrigerator-freezer that uses heat from a heat radiating pipe in order to prevent freezing in a drain hose of defrost water. In particular, it is equipped with an evaporator for refrigeration chambers for refrigeration temperature zones such as a refrigerator compartment and a vegetable compartment, and an evaporator for freezer compartments for refrigeration temperature zones such as a freezer compartment and an ice storage compartment, with a refrigeration temperature compartment at the top. Further, the present invention relates to a refrigerator-freezer comprising a refrigerator for a refrigerator compartment and having a freezing temperature zone chamber and an evaporator for a freezer compartment in the lower part.

  In the conventional refrigerator-freezer, the defrost water of the evaporator falls to the defrost water receiving tray located below the evaporator, flows into the drain hose, and is discharged to the evaporation tray provided in the machine room.

  However, there arises a problem that the defrost water is frozen in the drain hose and the drain hose is clogged.

  For this reason, it has been conventionally proposed to warm the drain hose with a heating wire heater to prevent freezing. Moreover, since adoption of a heating wire heater is disadvantageous in terms of power consumption, it has been conventionally proposed to prevent freezing by using heat from a heat radiating pipe (Patent Document 1). Furthermore, it has been conventionally proposed to prevent freezing of defrosted water from the evaporator for the refrigerator compartment in the drain hose with this heat radiating pipe (Patent Document 2).

  The conventional refrigerator-freezer described in this patent document 2 is demonstrated referring FIG. 4, FIG. 4 is a cross-sectional view of the refrigerator-freezer, and FIG. 5 is a rear view of the refrigerator-freezer.

  In this refrigerator-freezer, a refrigerator compartment 1 as a refrigeration temperature zone and a refrigerator compartment 2 as a refrigeration temperature zone are vertically partitioned, and the refrigerator compartment 1 is arranged above the freezer compartment 2.

  A heat insulating material 5 is foam-filled between the outer box 3 and the inner box 4, and an evaporator 6 for the refrigerator compartment is disposed on the back of the refrigerator compartment 1. An evaporator 7 is arranged.

  The defrost 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 evaporation tray 11 provided in the upper portion of the compressor 12. The defrosted water receiving tray 13 below the freezer evaporator 7 is connected to the drain hose 14, and the outlet side of the drain hose 14 faces the evaporation tray 11 provided in the upper portion of the compressor 12. The drain hoses 9 and 14 are disposed in the foam heat insulating material 5.

  As shown in FIG. 5, the heat radiating pipe 15 constituting 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 plate, and is in the vertical direction of the substantially right and left central part. Has a turn part 15a, and an inlet of the drain hose 9 is positioned in the vicinity of the turn part 15a.

  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.

  The defrosting of the refrigerator 6 for the refrigerator compartment is performed by an off-cycle defrost method that is performed when no refrigerant is passed through the evaporator without using a heater.

About this freezing refrigerator, the freezing prevention of the defrost water from the evaporator 6 for refrigerator compartments is demonstrated. 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. Then, the operation time of the compressor is counted by a microcomputer in a control board (not shown), 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 15 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 rear outer plate, and in the vertical direction of the substantially right and left central part. Since it has the turn part 15a and the inlet of the drain hose 9 is located in the vicinity of the turn part 15a, the heat of the heat radiating pipe 15 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.

Further, a spacer 10 is provided between the drain hose 9 and the inner box 4 to position the refrigerator heat insulating material 5 toward the refrigerator back outer plate.
JP-A-10-267508 JP-A-2005-156105

  However, in the conventional configuration, the prevention of freezing in the drain hose 9 for the defrost water of the evaporator 6 for the refrigerator compartment has not been sufficient.

  The defrost water of the evaporator 6 for the refrigerator compartment flows through the drain hose 9, and the drain hose 9 passes through the heat insulating material behind the freezer compartment 2. In this part, it is considered that the drain hose is below the freezing point due to the influence of the freezer 2 and freezing occurs.

  An object of this invention is to provide the refrigerator-freezer which solves said subject.

  In order to solve the above-described conventional problems, the refrigerator-freezer of the present invention is formed in a heat insulation box body filled with a foam heat insulating material (5) between the inner box (4) and the outer box (3), and the heat insulation box body. A refrigerated temperature zone chamber (1a), a refrigeration temperature zone chamber (2c) formed in the heat insulation box and disposed below the refrigeration temperature zone chamber (1a), and the refrigeration temperature zone chamber (1a). Refrigerating room evaporator (6) for cooling, freezing room evaporator (7) for cooling the freezing temperature zone (2c), and defrosted water of the refrigerating room evaporator (6) The drainage hose (9) for refrigeration embedded in the foam insulation (5) to drain the outside of the chamber, and the heat radiating pipe (15) disposed on the foam insulation (5) side of the back plate (3a) In the refrigerator-freezer comprising It was set up.

  Thereby, the heat from the heat radiating pipe 15 is transmitted to the drain hose, and freezing in the refrigeration drain hose near the freezer compartment can be prevented.

  A first embodiment of the present invention will be described. 1 to 3 show the refrigerator-freezer of Example 1, FIG. 1 is a conceptual diagram of a longitudinal section of the refrigerator-freezer, FIG. 2 is a front view of the refrigerator-freezer with the door removed, and FIG. It is sectional drawing which shows the state which cut | disconnected the freezer compartment part of the freezer refrigerator horizontally.

As shown in FIGS. 1 and 2, this refrigerator-freezer has a refrigerator compartment 1a and a vegetable compartment 1b that are refrigerated temperature zones, and an ice storage compartment 2a, a small freezer compartment 2b, and a freezer compartment 2c that are refrigeration compartments. The refrigeration temperature zone chambers 1a, 1b are arranged above the freezing temperature zone chambers 2a, 2b, 2c.

  A heat insulating material 5 is foam-filled between an outer box 3 made of a steel plate and a resin inner box 4 to form a heat insulating box. The back plate 3 a forms the back portion of the outer box 3, and the side plate 3 b forms the left and right side portions of the outer box 3. A heat insulation partition 23 is disposed at the lower part of the vegetable compartment 1b of the heat insulation box, and is partitioned from the lower freezing temperature zone rooms 2a, 2b and 2c. Moreover, the refrigerator 6 for refrigerator compartments is arrange | positioned at the back surface of the refrigerator compartment 1a, and the evaporator 7 for freezer compartments is arrange | positioned at the back surface of the freezer compartment 2a.

  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. The defrosted water receiving tray 13 below the freezer evaporator 7 is connected to the drain hose 14, and the outlet side of the drain hose 14 faces the evaporation tray 11 provided in the upper portion of the compressor 12.

  A glass tube heater (not shown) is provided below the refrigerator 6 for the refrigerator compartment. Cooling of the refrigerating temperature zone chambers 1 a and 1 b is performed by flowing a refrigerant through the refrigerating chamber evaporator 6 and operating the refrigerating cold air circulation fan 21. Further, the defrosting of the refrigerator for the refrigerator compartment 6 employs both the off-cycle defrost that is performed by operating the cold-air circulation fan 21 when the refrigerant is not supplied to the evaporator 6 and the glass tube heater that is energized. . In this refrigerator-freezer, normally, off-cycle defrost is performed, and defrosting with a glass tube heater is performed once every time off-cycle defrost is performed six times. Also, defrosting with a glass tube heater is performed even when cooling is poor.

  A glass tube heater (not shown) is provided below the freezer compartment evaporator 7. The freezing temperature zone chambers 2a, 2b, and 2c are cooled by flowing a refrigerant through the freezing chamber evaporator 7 and operating the freezing cold air circulation fan 22. Further, the defrosting of the freezer compartment evaporator 7 is performed by energizing the glass tube heater without flowing the refrigerant through the evaporator 7 every predetermined time.

The heat radiating pipe 15 that constitutes a part of the condenser that condenses the refrigerant compressed by the compressor 12 is provided on the foam heat insulating material 5 side of the refrigerator-freezer back plate as shown in FIGS. The heat radiating pipe 15 is arranged in the vicinity of the refrigeration drain hose 9 in the vicinity of the freezing temperature zone 2a, 2b, 2c. The drain hoses 9 and 14 are disposed in the foam heat insulating material 5. As described above, the refrigerator compartments 1 a and 1 b and the freezer compartments 2 a, 2 b and 2 c include the refrigerator compartment evaporator 6 and the freezer compartment evaporator 7. Cooling control of each is controlled to a predetermined temperature. And the operation time of the compressor 12 is counted by the microcomputer in a control board (not shown), and 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

  The heat radiating pipe 15 that constitutes a part of the condenser that condenses the refrigerant compressed by the compressor 12 is disposed on the surface of the refrigerator back plate 3a on the foam heat insulating material 5 side. Before the foaming, the heat-dissipating pipe 15 is attached to the foam insulating material side of the back plate 3a with the aluminum tape 24 and then foamed. Further, as shown in FIG. 2, the refrigeration drain hose 9 is not placed straight down from the defrost water receiving tray 8 as shown in FIG. 2, and is placed along the inner box 4 on the right side (the heat radiating pipe 15 during assembly). Side) and attached to the inner box 4. Then, by combining the inner box 4 and the outer box 3, both are arranged at close positions and fixed by foaming. The refrigeration drain hose 9 is close to the heat radiating pipe 15 in the heat insulating material at the back of the freezing temperature zone 2a, 2b, 2c. Particularly in the first embodiment, the refrigeration drain hose 9 is disposed between the heat radiating pipes 15 that are bent in a U-shape.

  Thus, since the heat of the heat radiating pipe 15 can be effectively transmitted to the drain hose 9, it is possible to prevent the defrost water in the drain hose 9 from freezing around the freezing temperature zone. In the proximity region between the refrigeration drain hose 9 and the heat radiating heat pipe 15, the both 9 and 15 are arranged vertically, and the work for bringing them into close proximity does not become complicated. Further, the mounting position of the refrigerating room evaporator 6 is designed so as to be separated from the heat insulating partition 23 so that the bending of the refrigerating drain hose 9 can be completed in the heat insulating material behind the refrigerating temperature zone chambers 1a and 1b.

  As described above, in the first embodiment of the present invention, the refrigerator-freezer in which the refrigerator compartment, the vegetable compartment, and the freezer compartment are arranged from the top is described. However, in the present application, the refrigerator compartment, the freezer compartment, and the vegetable compartment are arranged from the top. It can also be applied to freezer refrigerators.

It is a figure for demonstrating the outline of the longitudinal cross-section of the refrigerator-freezer of Example 1 of this invention. It is the figure from the front of the state which removed the door of the refrigerator-freezer of Example 1. FIG. It is sectional drawing which shows the state which cut | disconnected the freezer compartment part of the freezer refrigerator of Example 1 horizontally. It is sectional drawing of the conventional freezer refrigerator. It is a rear view of the conventional refrigerator-freezer.

Explanation of symbols

1a Refrigerated room (refrigerated temperature zone),
2c Freezing room (freezing temperature room),
3 Outer box,
3a Back plate (part of outer box 3),
3b side plate (a part of the outer box 3),
4 inner box,
5 Foam insulation,
6 Cold room evaporator,
7 Freezer compartment evaporator,
9 Drain hose for refrigeration,
15 Heat dissipation pipe.

Claims (1)

A heat insulating box filled with a foam heat insulating material between the inner box and the outer box, a refrigeration temperature zone chamber formed in the heat insulation box, and formed below the refrigeration temperature zone chamber formed in the heat insulation box. Refrigeration temperature zone chamber, refrigeration chamber evaporator for cooling the refrigeration temperature zone chamber, freezer compartment evaporator for cooling the refrigeration temperature zone chamber, and defrost water of the refrigeration chamber evaporator In a refrigerator-freezer comprising a drain hose for refrigeration embedded in the foam heat insulating material to drain the outside of the refrigerator, and a heat radiating pipe disposed on the foam heat insulating material side of the back plate,
A refrigerator-freezer, wherein the heat radiating pipe is disposed in the vicinity of the refrigeration drain hose disposed in the foam heat insulating material behind the freezing temperature zone.

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