JPH08313146A - Defrosted water draining device for refrigerator with deep freezer - Google Patents

Abstract

PURPOSE: To prevent the leakage or overflow of defrosted water in a freezing chamber at the time of defrosting. CONSTITUTION: The refrigerator with a deep freezer comprises a cooler disposed in the depth of a heat insulation box, a drip pan 17 disposed under the cooler, a defrosting heater 18 disposed between the pan 17 and the cooler, and thermal conductors 20 locked at the upper end to the heater 18, where the lower ends of the conductors 20a to 20d are inserted fixedly to the drain hole 21 of the pan 17.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a defrosting water discharge device for a refrigerator / freezer.

[0002]

2. Description of the Related Art A conventional defrost water discharge device for a refrigerator-freezer will be described. A defrosting heater covered with a glass tube is installed below a cooler equipped with a large number of radiation fins, and a drainage pan made of resin or the like is arranged below this defrosting heater, and the hole of the drainage pan is provided. The dew tray was formed of a metal plate such as aluminum provided with a through hole conforming to. Defrosting is performed periodically, and during defrosting, the defrosting heater is energized to radiate heat radially around the glass tube. The upper part is used as a heat source to melt the frost attached to the cooler, and the lower part radiates heat to the dew tray, and after frost, ice, and cold water fall, the drain is buried in the urethane foam through the holes after making water above 0 ° C. It is led to the evaporating dish outside the refrigerator through.

However, when the frosted state or the outside air temperature is low, there is a possibility that frost or ice may not be completely melted, or that the drain may be clogged due to surface tension on the evaporation dish. As a conventional example for avoiding this, there is, for example, Japanese Utility Model Publication No. 50-32390. This conventional example will be described with reference to FIG. The hook portion at the upper end of the rod-shaped good thermal conductor 100 is hooked on the heater tube 101, and the lower end portion is the dew tray 10
It is inserted into the drainage hole 103 of No. 2 and has a rod-shaped good thermal conductor 100.
Then, the heat of the heater tube 101 of the defrosting heater, which generates heat during defrosting, is conducted by the rod-shaped good conductor 100 to heat the vicinity of the drainage hole 103 of the dew tray 102 to melt the ice blocks formed by freezing the defrosting water. Further, defrosting water remaining due to surface tension or the like near the drain hole 103 is collected by a rod-shaped good thermal conductor to improve the draining action and minimize the remaining defrosting water.

[0004]

In such a conventional example, since the good thermal conductor is fixed only at the upper end portion, it falls off from the heater tube when it receives a strong shock during transportation of the refrigerator / freezer or installation of the refrigerator / freezer. There is. Also, when a user accidentally pushes a small piece of food into the dew tray from the cold air outlet or cold air inlet of the partition plate of the partition wall in the deep part of the freezer compartment, or when assembling a refrigerator / freezer, the parts are mistakenly placed in the dew tray. When it is dropped into the freezing tray, the drain hole of the dew tray is closed and the drainage is clogged to cause water leakage and water overflow into the freezing compartment.

Further, when the other end of the good thermal conductor is located at the center of the hole diameter of the drainage hole, ice having a diameter half the hole diameter is passed through the water distribution pipe. Therefore, when the drain pipe embedded in the urethane foam is bent, it becomes an ice block,
When the drain pipe is blocked or the drain pipe is in contact with the inner wall of the refrigerating compartment, there is a problem that cold air in the refrigerating compartment conducts heat and re-freezes in the drain duct to clog the drain duct. Further, when the good thermal conductor is not in the center of the hole diameter and contacts the end of the hole, an ice block having almost the same diameter as the hole diameter passes through the drain hole and flows into the drain pipe, so that the problem of drain pipe clogging becomes more serious.

The present invention focuses on the above-mentioned drawbacks of the prior art, prevents defrost water from leaking and overflowing in the freezing chamber during defrosting in the freezing chamber, and allows the defrosting water to pass through the drain pipe. An object of the present invention is to provide a freezer-refrigerator that can be reliably guided to a dew tray.

[0007]

[Means for Solving the Problems] A cooler arranged in the inner part of a heat insulating box, a dew tray arranged under the cooler, and a dew tray and the cooler. In a refrigerating refrigerator including a defrost heater and a good heat conductor whose upper end is locked to the defrost heater, the lower end of the good heat conductor is inserted and fixed in the drain hole of the dew tray. Preferably,
A spirally wound spiral portion is formed at the lower end of the good thermal conductor, and the spiral portion is fitted and fixed in the drain hole of the dew tray. More preferably, a spirally wound spiral portion is formed at the lower end of the good thermal conductor, and the outer diameter of the lowest end of the spiral portion is smaller than the inner diameter of the drain hole of the dew tray. A defrosting water discharge device for a refrigerator-freezer characterized in that the spiral portion is set to a size and fitted and fixed in the drainage hole.

[0008]

The other end of the good thermal conductor whose upper end is locked to the defrosting heater is inserted and fixed in the drain hole of the dew tray, and preferably the other end is spirally fitted and fixed in the drain hole. , When the good thermal conductor receives a strong impact, it may fall off from the heater tube, or the user may accidentally remove a small piece of food from the cold air outlet or cold air inlet of the partition plate of the partition wall at the inner part of the freezing room. It may be pushed down to the dew tray, or the components may be accidentally dropped into the dew tray when assembling the refrigerator / freezer or when repairing the refrigerator / freezer.
The defrosting water does not leak into the freezer because the fallen object blocks the drain hole of the dew tray and causes drainage clogging.

[0009]

Embodiments of the present invention will be described below with reference to the drawings.
1 is a vertical sectional view of a refrigerator-freezer, FIG. 2 is an enlarged vertical side view of a dew tray portion, FIG. 3 is a perspective view of a good heat conductor attached to a dew tray and a defrost heater, and FIG. It is a perspective view explaining an operation of a good conductor.

In FIG. 1, reference numeral 1 is a refrigerator-freezer, and the refrigerator-freezer 1 is a heat-insulating box body 2 having a front opening which constitutes its main body.
And doors 3 and 4 that close the opening of the box.
The door 3 is a rotary door corresponding to a freezer compartment 5 described later, and the door 4 is a rotary door corresponding to a refrigerating compartment 6 described later. Reference numeral 7 is a horizontal partition wall that divides the inside of the heat-insulating box 2 into upper and lower two chambers.
In this embodiment, the freezing chamber 5 where the food is cooled to a freezing temperature (for example, around -20 ° C) above the partition wall 7 and the refrigerating chamber 6 where the food is cooled to a temperature at which the food is not frozen (for example, about 3 ° C). I am trying.

Further, a partition plate 8 is arranged at the back of the freezer compartment 5,
A cooler chamber 11 in which a plate-fin type cooler 9 as a cooler and a blower 10 such as a propeller fan are arranged is formed in the rear part of the heat insulating box 2 behind the partition plate 8. Reference numeral 8a is an outlet for blowing the cool air cooled by the cooler 9 to the freezer compartment 5, and 8b is an inlet for returning the cool air circulated in the freezer compartment 6 to the cooler compartment 11.

Reference numeral 12 is a cold air duct to the refrigerating compartment 6, and distribution of the cool air to the refrigerating compartment 6 is controlled by opening and closing the baffle of the damper thermostat 13. A machine room 16 in which the compressor 14 and the evaporation tray 15 are arranged is formed in the rear part of the lower part of the heat insulating box 2. Reference numeral 17 is a dew tray arranged below the cooler 9, and 18 is a defrosting heater made of glass tube arranged between the dew tray 17 and the cooler 9. The defrost heater 18 integrates the operating time of the compressor 14 with a timer or the like and is periodically energized to perform defrost and cool the cooler 9
Defrosting is completed by a demetallization detection bimetal thermostat (not shown) attached to.

A drain pipe 19 guides defrost water from the dew tray 17 to the evaporation tray 15. Next, the rod-shaped good thermal conductor 20 used in the present invention will be described. Rod-shaped good conductor 20
Is made of aluminum, which has good heat conductivity and good workability,
As shown in FIGS. 3 and 4, the upper end portion 20a is locked to the defrosting heater 18 located above, and the lower end portion 20b has a gap (pitch) P.
Spiral part 20 with a few millimeters to 1 cm open
c is formed, and the outer dimension D of the lowermost one turn 20d is
The size is set to be slightly smaller than the inner diameter dimension D2 of the drain hole 21 of the dew tray 17, and one turn 20d of the spiral portion 20c is fitted and fixed in the drain hole 21.

As described above, since the dimension of D1 is smaller than that of D2, it is easy to fit, and the portion one turn up comes into contact with the dew tray 17. The spiral part 2 which is the lowermost end of the rod-shaped good conductor 20
Since one turn 20d of 0c is fitted and fixed in the drainage hole 21 of the dew tray 17, the defrosting heater 18 is pushed upward and the dew tray 17 is pushed downward so that the refrigerator / cooler is transported. It does not come off easily even if it receives a vibration such as a shock at the time of installation, and the user accidentally pushes a small piece 22 of food from the cold air outlet 8a or the cold air inlet 8b of the partition plate 8 of the freezer compartment 5 and the dew tray 1
Even if the screw 23 and the component 24 are dropped into the dew tray 17 by mistake when dropping to No. 7, when assembling the freezer / refrigerator or repairing the freezer / refrigerator, the spiral portion 20c of the good thermal conductor 20 prevents the screw 23 and the component 24 from damaging the drain hole. There is no possibility that 21 will be clogged and clogged with drainage to cause water leakage or water overflow into the freezing compartment. Also, one turn 20d of the lowermost end of the rod-shaped good conductor 21b
Since the outer diameter of the one is slightly smaller than the inner diameter of the drainage hole 21 of the dew tray 17, the spiral portion 20c one pitch of one turn 20d contacts the inner edge of the drainage hole 21 of the dew tray 17. Thus, the heat from the defrost heater 19 can be evenly transmitted, and the spiral portion 20c of the rod-shaped good thermal conductor 20 can be transmitted.
It becomes possible to drain the ice blocks 25 that have been dammed up by sufficiently melting them.

[0015]

As described above, the present invention provides a dew tray having a drain hole arranged below the cooler, and a defrosting heater for the cooler arranged between the dew pan and the cooler. In a freezer-refrigerator provided with a good conductor that locks to this defrost heater, the lower end of the good conductor whose upper end is locked to the defrost heater is inserted and fixed in the drain hole of the dew tray, and preferably a spiral of good conductor. Since the part is fitted in and fixed to the drainage hole, it can be prevented from coming off even when subjected to shock and vibration during transportation and installation of the refrigerator / freezer.

When a user accidentally pushes a small piece of food into the dew tray through the cold air outlet or cold air inlet of the partition plate of the freezer compartment, or when defrosting, an ice block larger than the drain hole is discharged from the cooler. When is dropped, since it is dammed by the spiral portion of the good thermal conductor, only the defrost water can be passed through the drain pipe and guided to the evaporation tray without clogging the drain hole of the dew tray.

Further, since the outer diameter of the lowermost one turn of the good thermal conductor is set to be smaller than the inner diameter of the drainage hole of the dew tray, it is easy to fit and the upper end one pitch higher than the one end of the lowermost turn. One roll of the part comes into contact with the inner edge of the drain hole of the dew tray, so that the heat from the defrost heater can be evenly transmitted, and the ice block dammed by the spiral part of the good thermal conductor can be melted sufficiently before draining. .

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a refrigerator-freezer according to the present invention.

FIG. 2 is an enlarged vertical side view of a dew tray portion of the present invention.

FIG. 3 is a perspective view of a rod-shaped good thermal conductor attached to the dew tray and the defrost heater of the present invention.

FIG. 4 is a perspective view for explaining the action of the good thermal conductor of the present invention.

FIG. 5 is a perspective view in which a rod-shaped good thermal conductor of a conventional example is attached.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Refrigerator / refrigerator 2 Heat insulation box 9 Cooler 15 Evaporating dish 17 Dew tray 18 Defrost heater 20 Good thermal conductor 20a Upper end of good thermal conductor 20b Lower end of good thermal conductor 20c Spiral part 20d One turn of spiral part 21 Drain hole

Claims (3)

[Claims] 1. A cooler arranged in the inner part of the heat insulation box, a dew tray arranged below the cooler, and a defrost heater arranged between the dew tray and the cooler. A refrigerator with a good heat conductor whose upper end is locked to the defrost heater, wherein the lower end of the good heat conductor is inserted and fixed in a drain hole of the dew tray. Frost water discharge device. 2. A cooler arranged in the inner part of the heat insulation box, a dew tray arranged below the cooler, and a defrost heater arranged between the dew tray and the cooler. In a refrigerating refrigerator provided with a good thermal conductor whose upper end is locked to this defrost heater, a spirally wound spiral part is formed at the lower end of the good thermal conductor, and this spiral part of the dew tray is formed. A defrost water discharge device for a refrigerator / freezer, which is fitted and fixed in a drain hole. 3. A cooler arranged inside the heat insulating box, a dew tray arranged below the cooler, and a defrost heater arranged between the dew tray and the cooler. In a refrigerating refrigerator including a good thermal conductor whose upper end is locked to the defrost heater, a spirally wound spiral portion is formed at the lower end of the good thermal conductor, and the lowermost end of the spiral portion is formed. The defrosted water discharge device for a refrigerator / freezer, wherein the outer size of one roll is set to be smaller than the inner diameter of the drain hole of the dew tray, and the spiral portion is fitted and fixed in the drain hole.