JPS6221898Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a refrigerator that prevents defrosting water from a freezing compartment from freezing in a drain pipe.

Conventionally, in refrigerators that have a freezer compartment and a refrigerator compartment, a drain pipe is provided to connect the bottom of the freezer compartment and the top of the refrigerator compartment, and an electric heater is attached around the drain pipe to prevent water leakage while the compressor is in operation. That is, during cooling operation, moisture, defrost water, etc. are frozen in the upper part of the drain pipe, thereby blocking the drain pipe and cutting off the communication between the freezer compartment and the refrigerator compartment. The convection of cold air between the rooms is eliminated, and when defrosting, the electric heater is energized to generate heat to melt the ice at the top of the drain pipe and connect the freezer and refrigerator compartments, thereby preventing the ice from being removed from the freezer compartment. The frost water is led to the water receiving gutter in the refrigerator compartment through the drain pipe. By the way, according to the above-mentioned conventional configuration, the freezer compartment and the refrigerator compartment are in a non-communicating state during cooling operation, so there is a problem that the freezer compartment becomes negative pressure and it becomes difficult to open the freezer compartment door. For this reason, in the past, the back of the freezer compartment and the back of the refrigerator compartment were communicated with each other through a small-diameter communication pipe, and an electric heater was attached around this communication pipe, and the electric heater was energized to generate heat during cooling operation. This is to prevent the communication pipe from becoming clogged due to freezing due to moisture or the like.
However, in the above-mentioned conventional configuration, the freezer compartment and the refrigerator compartment must be connected through two routes, a drain pipe and a communication pipe, and an electric heater must be attached to each, resulting in a complicated configuration. However, it is expensive and requires an electric heater, which increases power consumption.

The present invention was developed in view of the above circumstances, and its purpose is to discharge defrosting water from the freezer compartment and communicate with the freezer compartment and refrigerator compartment using only one drainage pipe, and to To provide a refrigerator that can prevent defrosting water from freezing in a drain pipe, has a simple structure and assembly, can be manufactured at low cost, and can save power.

An embodiment of the present invention will be described below with reference to the drawings.

1 is an outer box having a back plate 2; 3 is a plastic back plate 4 disposed at the upper part of the inside of the outer box 1;
A rectangular box-shaped freezer compartment cooler 5 has an inner box made of plastic, and a foaming heat insulator 6 is filled between these inner boxes. The inside of the inner box 5 is used as a refrigerator compartment 8.
A refrigerator compartment cooler 9 is disposed in the rear upper part of the refrigerator compartment 8 so as to be inclined downward toward the rear.
A water receiving gutter 1 is installed so as to face the rear end from below.
0 is placed. 11 is the back plate 2 of the outer box 1
This is a condenser pipe that is attached in a meandering manner to the inner surface of the refrigeration cycle, and together with a compressor (not shown), the freezer compartment cooler 3, the refrigerator compartment cooler 9, etc., it constitutes a well-known refrigeration cycle. The heat generated in the condenser pipe 11 when the compressor is driven is dissipated from the back plate 2.

Now, 12 is a drain pipe line, which is a first drain pipe 1 integrally formed at the lower end of the back plate 4.
3, a second drain pipe 14 made of a metal with a small heat capacity, such as aluminum, and a third drain pipe 15 made of a material with a large heat capacity, such as plastic. The front opening opens downward and communicates with the inside of the freezing chamber 7, and a square annular flange portion 13a is formed at the lower opening, and the second drain pipe 14 and the third drain pipe 15 are square. While being formed in a cylindrical shape, the lower half of the third drain pipe 15 is formed in a tapered shape. In this case, the second drain pipe 14 is set to have a length of 24 mm on one side and a height of 70 mm. The upper end of the second drain pipe 14 is fitted and connected to the flange portion 13a of the first drain pipe 13, and the lower end of the second drain pipe 14 is fitted into the upper half of the third drain pipe 15. They are connected together, and a third
The tapered lower end of the drain pipe 15 passes through the top plate 5a of the inner box 5 in an airtight manner so as to face the rear end of the refrigerator compartment cooler 9 in the refrigerator compartment 8 from above. Reference numeral 16 denotes a heat transfer member, which is formed by bending a long belt-like plate made of aluminum, and includes heat transfer parts 16b, 16b, which are both legs of a relatively long heat receiving part 16a in the center. They are curved so that they approach each other, and then curved so that they become parallel to each other from the middle, forming a so-called flared shape. Heat transfer portions 16b, 1 in this heat transfer member 16
The tip portions of 6b are attached to the outer surfaces of two opposing side walls of the second drain pipe 14 by welding. Reference numeral 17 denotes an intervening body formed by wrapping a metal foil, for example, aluminum foil 17b around the outer periphery of a soft heat insulator, for example, a soft urethane foam 17a;
An adhesive layer (not shown) is applied to the surface of 7b. This intervening body 17 has one surface portion adhered to a part of the condenser pipe 11 and the inner surface of the back plate 2, and the other side surface portion adhered to the heat receiving portion 16a of the heat transfer member 16. Then, the heat receiving part 16
a and the condenser pipe 11. Incidentally, as shown in FIG. 3, this intervening body 17 is bonded in advance to the inner surface of the back plate 2, and the back plate 2 is attached to the rear opening of the outer box 1 to close it. At the same time, the heat receiving part 16a of the heat transfer member 16
It is designed to be bonded by pressure contact.

During operation of the compressor (not shown), that is, during cooling operation, part of the heat of the condenser pipe 11 is received by the heat receiving portion 16a of the heat transfer member 16 via the aluminum foil 17b of the intervening body 17 and transferred. The second drain pipe 14 via the hot parts 16b, 16b
Therefore, the second drain pipe 1
4 is now heated by the heat of the condenser pipe 11, and even if the defrosting water flowing down the drain pipe 12 during defrosting remains as water droplets in the second drain pipe 14, it will not freeze. This prevents it from becoming larger over time.

According to this embodiment, the following effects can be obtained. That is, the lower back part of the freezer compartment 7 and the upper back part of the refrigerator compartment 8 are communicated with each other through a drain pipe line 12 consisting of first, second, and third drain pipes 13, 14, and 15, and the second drain pipe Since the heat from the condenser pipe 11 is transferred to the condenser pipe 14 through the heat transfer member 16, during defrosting, the defrosting water from the freezer compartment 7 is transferred to the water receiving gutter in the refrigerator compartment 8 via the drain pipe 12. 1
Furthermore, during the cooling operation, the defrosting water remaining in the drain pipe 12 can be prevented from freezing, and the freezer compartment 7 and the refrigerator compartment 8 can be kept in communication with each other. This can prevent the inside of the freezer compartment 7 from becoming negative pressure and prevent the freezer compartment door (not shown) from becoming difficult to open. Since the lower half of the drain pipe 15 is tapered, it is possible to prevent cold air from flowing between the freezer compartment 7 and the refrigerator compartment 8 as much as possible. Therefore, the single drainage pipe 12 can both discharge the defrosting water from the freezer compartment 7 and communicate the freezer compartment 7 and the refrigerator compartment 8, making the structure simpler and cheaper than before. Moreover, the heat of the condenser pipe 11 can be transferred to the second pipe by the heat transfer member 16.
Since the power is transmitted to the drain pipe 14 of the heater, the wiring work during assembly can be simplified compared to the conventional method that uses an electric heater, and there is no need to consider electrical insulation, making the structure even simpler and cheaper to manufacture. Moreover, by not using an electric heater, it is possible to save power. Furthermore, since the upper end and lower end of the second drain pipe 14 having heat conductive properties are connected to the first drain pipe 13 and the third drain pipe 15, respectively, which have heat insulating properties, the second drain pipe 14 The heat transferred to the freezer compartment 7
This can reliably prevent the heat from being transmitted to the refrigerator compartment 8. Then, the heat receiving part 1 of the heat transfer member 16
6a and the capacitor pipe 11, an intervening body 17 made of a soft urethane foam 17a wrapped around an aluminum foil 17b is interposed.
For example, unlike the case where the heat receiving part 16a of the heat transfer member 16 is brought into direct contact with the condenser pipe 11, the heat receiving part 16a may become separated from the condenser pipe 11 due to variations in manufacturing precision and assembly precision, making it impossible to receive heat. Without that, the heat receiving part 16
a is in indirect and reliable contact with the condenser pipe 11 via the intervening body 17 and can reliably receive heat from the condenser pipe 11;
Variations in manufacturing accuracy and assembly accuracy can be fully absorbed.Furthermore, the intervening body 17 can be adhered to the inner surface of the back plate 2 in advance, and the back plate 2 can be attached to the rear opening of the outer box 1. When the intervening body 17 is attached to the heat receiving part 16a of the heat transfer member 16 to close the heat receiving part 16a, the intervening body 17 is simultaneously pressed and bonded to the heat receiving part 16a of the heat transfer member 16, which has the advantage that assembly is extremely simple.

In the above embodiment, the intervening body 17 was bonded in advance to the inner surface of the back plate 2, but instead, the intervening body 17 was bonded in advance to the heat receiving portion 16a of the heat transfer member 16. When the back plate 2 is attached to the rear opening of the outer box 1, the inner surface of the back plate 2 and a part of the condenser pipe 11 may be pressed and bonded to the intervening body 17 at the same time.

In addition, the present invention is not limited to the embodiments described above and shown in the drawings, but can of course be implemented with appropriate modifications within the scope of the gist.

As explained above, the present invention is designed to connect the drain pipe that discharges defrosting water from the freezer compartment to the refrigerator compartment side with an insulating first pipe.
a drain pipe, a heat conductive second drain pipe, and an insulating third drain pipe whose lower part is tapered,
Since the heat of the condenser pipe is transferred to the second drain pipe via a heat transfer member, only one drainage pipe route is required to discharge defrost water from the freezer compartment and communicate the freezer compartment and refrigerator compartment. Furthermore, it is possible to reliably prevent the defrosting water from freezing in the drain pipe, it is easy to configure and assemble, it can be manufactured at low cost, it can save power, and it is also possible to An intervening body made of a soft heat insulator wrapped with metal foil is interposed between the heat member and the condenser pipe, so the refrigerator can reliably transfer the heat from the condenser pipe to the heat transfer member. can be provided.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, with Fig. 1 being a vertical sectional side view of the main parts, Fig. 2 being a perspective view of the second drain pipe and the heat transfer member, and Fig. 3 showing the whole for explaining the operation. FIG. In the drawing, 1 is an outer box, 2 is a back plate (back), 3 is a freezer cooler, 4 is a back plate, 7 is a freezer compartment, 8 is a refrigerator compartment, 11 is a condenser pipe, 12 is a drainage pipe, 13 is a first drain pipe, 14 is a second drain pipe,
15 is a third drain pipe, 16 is a heat transfer member, 16a is a heat receiving part, 17 is an intervening body, 17a is a soft urethane foam (soft heat insulator), and 17b is an aluminum foil (metal foil).

Claims (1)

[Scope of utility model registration request] A condenser pipe is attached to the back plate of an outer box that has a freezer compartment and a refrigerator compartment formed therein through a heat insulator, and the defrosting water from the freezer compartment is discharged to the refrigerator compartment side through a drain pipe. In the apparatus, the drain pipe is connected to an insulating first drain pipe provided in a lower part of the back of the freezer compartment so as to communicate with the freezer compartment, and an upper end thereof is connected to the first drain pipe. a heat-conductive second drain pipe, and a third heat-insulating drain pipe whose upper end is connected to the lower end of the second drain pipe, whose lower end is tapered, and which faces into the refrigerator compartment. , one side of a heat transfer member is attached to the second drain pipe in order to transfer the heat of the condenser pipe to the second drain pipe, and between the other side of the heat transfer member and the condenser pipe. A refrigerator characterized in that an intervening body made of a soft heat insulating material wrapped with metal foil is interposed therein.