JPS6186568A - refrigerator - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to an invention for efficiently generating heat from a radiation-type defrosting tube heater installed in a cooler for defrosting the cooler.

[Background of the invention]

A conventional refrigerator with this kind of structure will be explained with reference to FIGS. 6 and 7. 1 is a refrigerator main body, 2.3 is a freezing compartment formed inside the refrigerator main body 1; be.

Reference numeral 4 denotes a partition wall that partitions the freezer compartment 2 and the refrigerator compartment 3.

5 indicates a cold air passage formed within the partition wall 4.

6 is a cooler installed at the rear of the freezer compartment 2, and 7 is a radiation type defrosting tube heater installed at the bottom of the cooler 6.

Reference numeral 8 denotes rubber caps attached to both ends of the defrosting tube heater 7, which process the ends of lead wires (not shown).

Reference numeral 9 denotes a ceiling cover installed between the cooling unit 6 and the defrosting pipe heater 7.This ceiling cover 9 allows the defrosting water dripped from the cooler 6 to hit the defrosting pipe heater 7, and produces evaporation noise. In addition, this ceiling cover 9 is attached to the rubber cap 8 on the defrosting tube heater 7 side with the mounting legs 9a at both ends, and is also attached to the cooler 6 with the supporting legs 9b. 10 is a gutter that receives the defrosting water dripping from the cooler 6. As shown in the figure, this gutter 10 is installed once when filling the refrigerator body 1 with foam insulation material. 11 is a protector made of aluminum or the like.This protector 11 prevents the gutter 10 from being abnormally heated by the defrosting tube heater 7 and deformed.

12 is a drain provided for draining the defrosting water accumulated in -10 above to the outside of the refrigerator. In addition, the defrosting pipe heater 7
In order to prevent frost from forming inside the cold air passage 5 shown in the figure (the passage that returns the cold air discharged to the refrigerator compartment 3 to the cooler 6), the cold air passage 5 is usually is set up.

13 is a partition plate that divides the inside of the freezer compartment 2 into a place where the cooler 6 is installed and a place where food is placed; 14 is a fan guard; and 15 is a blower for forced circulation of cold air. In a conventional refrigerator having such a structure, a normal cooling operation is performed as follows. That is, the cold air cooled by the cooler 6 is passed through the partition plate 13 by the blower 15 for forced circulation inside the refrigerator.
While being discharged into the freezer compartment 2 through the fan guard 14,
Although not shown in the figure, the cold air is also discharged into the refrigerator compartment 3 through a cold air passage.

The cold air discharged into the freezer compartment 2 and the refrigerator compartment 3 cools the food in each compartment, and then returns to the cooler 6 section.

That is, the cold air in the freezer compartment 2 is passed through the freezer compartment return cold air passage 16, and
The cold air in the refrigerator compartment returns from the cold air passages 5, respectively.

While this operation is repeated, the cooler 6 becomes frosty.

This accumulated frost should be removed (when power is applied to the defrosting pipe heater 7, the cold air around the defrosting pipe heater 7 is heated by the heater 7, rises to the cooler 6 side, and removes the frost attached to the cooler 6). In this process, the melted water falls from the cooler 6 toward the defrosting pipe heater 7.However, since there is a ceiling cover 9 above the defrosting pipe heater 7, the defrosting water is not exposed to direct light. Water hits the defrosting tube heater 7 and does not produce evaporation noise.Also, when the defrosting tube heater 7 is heating, the surface of the gutter 10, etc. is covered with an aluminum protector 11. This prevents the gutter lO from being abnormally heated and deformed.

As described above, conventional refrigerators have been made practical by providing the protector 11 that covers the entire gutter 10, but the cost of the protector that covers the entire gutter 10 is high, and the cooler 6, ceiling cover 9, defrost pipe heater 7
In refrigeration, the fan guard 14 and partition plate 13 are removed and the cooler 6 is pulled out to the freezer compartment 2 side. When servicing the cooler 6, there was a problem in that the defrosting tube heater 7 hit the zero part of the partition wall 4 and the cooler 6 had to be pulled out.

Furthermore, since no special measures have been taken to supply heat from the defrosting pipe heater 7 to the cold air passage 5 which cannot be covered with the aluminum protector 11, the heat supply from the defrosting pipe heater 7 is limited. If there is too much, the partition wall 4 forming the cold air passage 5
There were also problems such as thermal deformation of the insulation material.

[Purpose of the invention]

The present invention has been made to solve the various problems mentioned above.

[Summary of the invention]

That is, the heat generating part of the defrosting tube heater is located in a box-shaped cover with an open top surface, the top surface of the defrosting tube heater is covered with a ceiling cover, and the heating is generated by being surrounded by the box-shaped cover and the ceiling cover. The room (the room where the heat generating part of the defrosting tube heater is located) is located in the gutter installed at the bottom of the cooler, and the air intake hole that takes in the cold air returned from the refrigerator to the bottom of the heating chamber, the cooler, etc. An air discharge port is formed to send hot rays and heated air toward.

[Embodiments of the invention]

The details of the present invention will be explained below with reference to an embodiment shown in FIGS. 1 to 5.

Note that the same reference numerals in the drawings indicate the same parts, so the explanation will be omitted.

Reference numeral 27 denotes a radiation type tube heater for removal'*i equipped with the present invention. The defrosting pipe heater 27 has lead wires (
A rubber cap 28 is also provided for handling the terminal (not shown).

29 is a box-shaped cover with an open top. Inside this box-shaped cover 29 is a heat generating part 2 of the radiation type unboxing tube heater 27.
7a is located. Moreover, this box-shaped cover 29
As shown in the figure, its cross-sectional shape is U-shaped.

Further, this box-shaped cover 29 elastically holds the rubber cap 28 with a holding part 29b provided on a side wall 29a.

The box-shaped cover 29 is fixed to the rubber cap 28 as shown in FIG. It is completed when the expansion to (Pl) (Fig. 5) is restricted.

Reference numeral 32 denotes an air intake port provided on the bottom surface of the box-shaped cover 29, etc. From this air intake port 32, the cold air that has cooled the freezing chamber 2 and the cold chamber 3 is supplied to the heating chamber 33, which is composed of the box-shaped cover 29, the ceiling cover 30, the defrosting pipe heater 27, etc. It is something that

34 is an opening provided in the rising piece 29a portion (the rising piece located on the partition side) of the box-shaped cover 29. This opening 34 just faces the return passage 5 from the refrigerator compartment 3, and is an opening suitable for supplying just the right amount of heat to the passage 5 when the defrosting tube heater 27 generates heat.

35 is a guide piece provided above the opening 34.

This guide piece 35 may be about 3 to 10 fins long (and is formed to protrude substantially perpendicularly to the rising piece 29c).

36 is a cutout window formed opposite to the return passage 16 from the freezer compartment 2. Since there is no temperature difference in the return passage 16, the amount of frosting is smaller than in the passage 5. Taking this into consideration, this passage 16 is provided with an eaves 36a to prevent heat from being supplied to the previous passage 5.

Reference numeral 37 denotes a hole provided in the bottom surface of the box-shaped cover 29, which also serves as an air intake port. The size of this hole and the air intake port 32 described above is such that an amount of heat can be supplied to the gutter 10 so that no frost remains in the gutter 10, and the gutter 10 is not deformed.

38 is a support leg provided on the gutter 10. This support leg 38 is formed into an elastic shape as shown in the figure, and the rubber cap 28 is held in the clamping portion 38a through the opening of the support leg 38.
When the support legs 38 are positioned in the gutter 1, the support legs 38
It is fixed above 0. Reference numeral 39 denotes an air discharge port opened in the upper part of the box-shaped cover 29, which has a sufficient opening area to melt frost adhering to the EVP during defrosting.

The defrosting pipe heater 27 is assembled into the refrigerator 1 by sandwiching the rubber cap 28 with the clamping portion 29b of the box-shaped cover 29, and then inserting the ceiling cover 30 into the box-shaped cover 29 so that the box-shaped cover 29 expands. prevent this and perform positioning.

The defrosting tube heater 27 assembled in this way is assembled with a rubber cap 28 on the support leg 38 of the gutter 10 which is assembled into the main body.

As described above, the refrigeration operation in the configured refrigerator is approximately the same as that described in the conventional example, or during defrosting, the defrosting water from the cooler 6 is dripped toward the defrosting pipe heater 27. This is prevented by the ceiling cover 30 as in the past, while most of the heat generated by the defrosting tube heater 27 is supplied to the box-shaped cover 29 without being supplied to unnecessary areas or areas that should not be heated. It is used to heat the air temperature in the heating chamber 33 formed by the ceiling cover 30 and the ceiling cover 30.This is because the ceiling cover 30 and the box-shaped cover 29 are made of a highly reflective metal such as aluminum. The heat rays emitted from the tube heater in the circumferential direction are diffusely reflected inside the heating chamber, except through openings such as holes made as necessary, and are used to raise the air temperature within the heating chamber as a result. Therefore, the warmed air generated by convection in this part is gradually supplied to the cooler side through the air outlet 39 provided at the upper part of the heating chamber, so that the defrosting process is accelerated.

In this process, a controlled amount of heat is supplied to the cold air passage 5 or the bottom of the gutter.

〔Effect of the invention〕

As explained above, the present invention locates the heat generating part of the defrosting tube heater in a box-shaped cover with an open top surface, covers the top surface of the defrosting tube heater with a ceiling cover, and combines the box-shaped cover and the ceiling cover. The enclosed heating room (the room where the heat generating part of the defrosting pipe heater is located) is located at the bottom of the cooler (in the gutter installed here), and the cold air returned from inside the refrigerator is taken into the bottom of the heating chamber. Since it has an air intake port and an air discharge port that sends hot rays and heated air toward the cooler, etc., it is possible to defrost efficiently.
This prevents deformation of the gutter without providing a large protective body as in the past, and prevents the inside of the cold air passage from being abnormally heated and thermally deformed.

[Brief explanation of the drawing]

Figure 1 is a cross-sectional view of the main parts of a refrigerator equipped with the present invention, Figure 2 is a diagram showing the fixing structure of the defrosting tube heater shown in Figure 1, and Figure 3 is a diagram showing a cover installed in the gutter. FIG. 4 is a perspective view of essential parts of a defrosting tube heater, FIG. 4 is a sectional view taken along the line xx in FIG. 3, FIG. 1 is a partial sectional view of a conventional refrigerator, and FIG. 7 is a diagram showing the fixing structure of the defrosting tube heater shown in FIG. , 3... Refrigerator room, 4... Middle partition wall, 5... Refrigeration passage, 6... Cooler, 27... Defrosting tube heater, 27a... Heat generating part of tube heater, 28... Rubber cap, 29... Box-shaped cover, 29a... Side wall, 29b... Holding part, 29c
...Rising piece, 3゜...Ceiling cover, 30a...
Leg, 31... Notch hole, 32... Air intake port, 33.
... Heating chamber, 34... Opening, 35... Guide piece, 3
6... Notch window, 36a... Eaves, 37... Hole,
38... Support leg, 38a... Support leg clamping part, 39
...Air outlet. ,〆), Agent Patent Attorney Akio Takahashi 1; 13α Fig. 4 χ No. SI2] fi:16(b

Claims (1)

[Claims] 1. As detailed in the main text, the heat generating part of the defrosting tube heater is located in a box-shaped cover with an open top surface, and the top surface of the defrosting tube heater is covered with a ceiling cover, The heating room surrounded by the box-shaped cover and the ceiling cover (the room where the heat generating part of the defrosting tube heater is located) is located in the gutter installed at the bottom of the cooler, and the heating room is located at the bottom of the heating chamber. A refrigerator characterized in that an air intake port takes in returned cool air from inside the refrigerator, and an air discharge port sends hot rays and heated air toward a cooler, etc. 2. The refrigerator according to claim 1, wherein the box-shaped cover and the ceiling cover are made of a metal with high reflectivity, such as a thin aluminum plate. 3. The refrigerator according to claim 1, wherein an opening or a hole is provided in the upright piece located on the partition side of the box-shaped cover and in the bottom surface.