JPS6186567A - 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 a radiation type unboxing tube heater installed at the bottom of a cooler.
[Background of the Invention] A conventional refrigerator with this type of structure will be explained with reference to FIGS. 6 and 7. 1 is the refrigerator body, 2.3 is the refrigerator body, This is a freezer compartment formed inside the refrigerator main body 1, and is a refrigerating compartment.

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

9 is a ceiling cover installed between the cooler 6 and the defrosting tube heater 7. This ceiling cover 9 prevents the defrosting water dripping from the cooler 6 from hitting the defrosting tube heater 7 and generating evaporation noise. In addition, this ceiling cover 9 is attached to the rubber cap 8 on the side of the unboxing tube heater 7 by holding the mounting legs 9a at both ends.
The pond attached to the cooler 6 is suspended by supporting legs 9b. 10 is a gutter that receives the defrosting water dripping from the cooler 6. This gutter 10 is installed when filling the refrigerator body 1 with foamed insulation material, as shown in the figure. 11 is a protective body made of aluminum or the like. This is to prevent the defrosting pipe heater 7 from abnormally heating and deforming the defrosting tube heater 7.

Reference numeral 12 denotes a drain provided to drain the defrosting water accumulated in the gutter 10 to the outside of the refrigerator. In addition, the defrosting pipe heater 7
As shown in the figure (see figure), the cold air passage 5 (the passage that returns the cold air discharged to the refrigerator compartment 3 to the cooler 6) is normally used to prevent frost from forming inside the cold air passage 5. It is installed.

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 discharged into the freezer compartment 2 through the partition plate 13 and the fan guard 14 by the blower 15 for forced circulation inside the refrigerator, and is also discharged into the refrigerator compartment 3 although not shown in the figure. It is discharged through the 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 1 again. That is, the cold air in the freezer compartment 2 is returned through the freezer compartment return cold air passage 16, and the cold air in the refrigerator compartment is returned through the cold air passage 5.

While this operation is repeated, frost forms on the cooler 6.

When the defrosting pipe heater 7 is energized to remove this accumulated frost, the cold air around the defrosting pipe heater 7 is heated by the heater 7, rises to the temperature of the cooler 6, and removes the frost attached to the cooler 6. Comb. In this process, the water melted 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 of the light directly hits the defrosting pipe heater 7, and no evaporation noise is generated. Also, when heating this defrosting tube heater 7,
Since the surface of the gutter 10 and the like are covered with a protector 11 made of aluminum, the gutter 10 is prevented from being abnormally heated and deformed.

As mentioned above, conventional refrigerators have been made practical by providing a protector 11 that covers the entire gutter 10, but the cost of the protector that covers the entire gutter 10 is high, and the cooling In a refrigerator in which a ceiling cover 9 and a defrosting tube heater 7 are attached to the container 6, the fan guard 14 and the 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 middle part of the partition wall 4 and the cooler 6 had to be pulled out.

The heat supply from the defrosting tube heater 7 to the cold air passage 5 which cannot be covered with the aluminum protector 11 is as follows.
Since no special measures were taken, there was a problem that if too much heat was supplied from the defrosting pipe heater 7, the heat insulating material of the partition wall 4 forming the cold air passage 5 would be thermally deformed.

[Purpose of the invention]

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

[Summary of the invention]

That is, in a refrigerator that has a defrosting tube heater at the bottom of the cooler and a ceiling cover interposed between the cooler and the defrosting tube heater, the ceiling cover and the defrosting tube heater are heated with defrosting water. It is designed to be fixed to the receiving shaft side.

[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.

27 is a radiation type defrosting tube heater equipped with the present invention. Rubber caps 28 for treating the ends of lead wires (not shown) are provided at both ends of the defrosting tube heater 27.

29 is a box-shaped cover with an open top. Inside this box-shaped cover 29 is the heat generating part 2 of the radiation type defrosting 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 fixation of the box-shaped cover 29 to the rubber cap 28 is as shown in FIG. ) is completed when the spread (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 freezer compartment 2 and the refrigerator compartment 3 is supplied to a heating chamber 33 that is composed of the box-shaped cover 29, the ceiling cover 30, the defrosting tube heater 27, etc. It is something.

34 is an opening provided on the rising piece 29a (inner partition side) of the box-shaped cover 29. This opening 34 is exactly opposite to the return passage 5 from the refrigerator compartment 3; The opening is suitable for supplying just the right amount of heat to the passage 5 when the defrosting pipe heater 27 generates heat.

35 is a guide piece provided above the opening 34. As shown in FIG.

This guide piece 35 may have a weight of about 3 to 10 W, and is formed to protrude substantially perpendicularly to the rising piece 29c.

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

Reference numeral 37 indicates 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.

1,' 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. 40 is a leg for positioning 1a. This leg 40 is integrally formed with the gutter 10 and positions the cooler 6. Therefore, since the defrosting tube heater 27, ceiling cover 30, and cooler 6 are assembled based on the gutter 10, there is no misalignment between the three.

The refrigeration operation in the refrigerator configured as described above is substantially the same as that described in the conventional example, or during defrosting, the dripping of defrosting water from the cooler 6 toward the dew pipe heater 27 is performed. While being prevented by the ceiling cover 30 as in the past, most of the heat generated by the defrosting tube heater 27 is not supplied to unnecessary areas or areas that should not be heated, and is instead heated by the box-shaped cover 29. It is used to heat the air inside the heating chamber 33 formed with the ceiling cover 30. This is because the ceiling cover 30 and the box-shaped cover 29 are made of highly reflective metal such as aluminum, so that the heat rays emitted from the radiant tube heater in the circumferential direction can be released as needed. It is diffusely reflected inside the heating chamber except through openings such as holes, and is used to raise the air temperature inside the heating chamber as a result. Therefore, convection occurs in this area, and the warmed air 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 provides a ceiling cover and a defrosting tube in a refrigerator having a defrosting tube heater in the lower part of the cooler and a ceiling cover interposed between the cooler and the defrosting tube heater. Since the heater is fixed to the shaft side that receives the defrosting water, not only can efficient defrosting be performed, but also when servicing the cooler, the cooler can be attached to the freezer compartment side regardless of the defrosting pipe heater. In addition, in the present invention, the positioning legs provided on the shaft side reduce the installation error of the cooler with respect to the gutter, so the width of the ceiling cover can be minimized and the width of the ceiling cover can be minimized. It is less likely to inhibit the rise of warm air heated by the frost tube heater.

[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 the main parts of the defrosting tube heater, FIG. 4 is a sectional view taken along the line xx in FIG. 3, FIG. A partial cross-sectional view of a refrigerator showing the conventional structure,
FIG. 7 is a diagram showing a fixing structure of the defrosting tube heater shown in FIG. 1. 1... Refrigerator body, 2... Freezer compartment, 3... Refrigerator compartment, 4... Partition wall, 5... Refrigeration passage, 6... Cooler, 27... For 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, 3o...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, 39... Air discharge port, 38a...
- Support leg clamping part, 40... positioning leg. Agent Patent Attorney Akio Takahashi No. 40 Figure S Figure 62

Claims (1)

[Scope of Claims] 1. As detailed in the main text, in a refrigerator having a defrosting pipe heater at the bottom of the cooler and a ceiling cover interposed between the cooler and the defrosting pipe heater, the ceiling cover and a refrigerator characterized in that a defrosting tube heater is fixed to a gutter side that receives defrosting water. 2. The refrigerator according to claim 1, wherein the positioning legs provided on the gutter side reduce the mounting error of the cooler with respect to the gutter. 3. A refrigerator characterized in that the defrosting pipe heater is fixed to a gutter after a ceiling cover is fixed to the rubber caps provided at both ends of the defrosting pipe heater using mounting legs.