JPS60228876A - 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 refrigerator that uses a defrosting tube heater as a heating means for removing a box attached to the cooler, and in particular, the present invention relates to a refrigerator that uses a defrosting tube heater as a heating means for removing a box attached to the cooler. The present invention relates to an invention in which the heated rays are efficiently applied to frosted areas around the cooler.

[The troubles of invention]

The structure of a conventional refrigerator of this type will be explained with reference to FIG. 1. Reference numeral 1 denotes a refrigerator body, and the body 1 has a freezer compartment 2 and a refrigerator compartment 3 formed therein. 4 and 5 are a freezer compartment door and a refrigerator compartment door that close the front openings of the freezer compartment 2 and the refrigerator compartment 3. 6
indicates a partitioning thermal wall that partitions the freezer compartment 2 and the refrigerator compartment 3.

As shown in the figure, inside the partitioning thermal wall 6, a cold air return passage 7 from the freezer compartment 2 and a cold air return passage 8 from the refrigerator compartment 3 are formed. 9 is a cooler, 10 is an internal fan for forcedly circulating cold air cooled by the cooler 9 to the freezer compartment 2 and the refrigerator compartment 3, and 11 is a fan guard. A gutter 12 is provided at the bottom of the cooler 9 and receives defrosting water generated when the cooler 9 is defrosted. 12a is a drain pipe of the gutter 12, and although this drain pipe 12a is not shown in the figure, it is connected to a vibrator that leads the defrosting water out of the refrigerator.

Reference numeral 13 denotes a defrosting tube heater, which usually has a structure in which a coiled nichrome wire is covered with a quartz glass tube. Therefore, when the defrosting pipe heater 13 is energized, it radiates heat rays in a radial shape.

Reference numeral 14 denotes a roof made of an aluminum plate or the like provided between the defrosting circular tube heater 13 and the cooler 9.

This roof 14 prevents the defrosting water dripping from the cooler 9 during removal from coming into contact with the direct-light defrosting circular tube heater 13, evaporating, and producing sound.

Reference numeral 15 denotes a defrosting performance guarantee heater provided at the bottom of the cold air return passage 8 from the refrigerator compartment, and is energized in synchronization with the defrosting pipe heater 13 during defrosting.

Reference numeral 16 denotes a protective cover made of aluminum or the like provided to prevent the gutter 12 and the portion of the partitioning thermal wall 6 facing the defrosting tube heater from being overheated and deformed. Since the fan 10 also stops when the operation is stopped, the relatively heavy cold air existing around the cooler 9 flows freely in the cold air return passage 8 from the refrigerator compartment, and in this air return passage 8. It collides with the relatively light yet high mixed air (about 10 centimeters) coming in from the saving room, creating ice cubes on the walls of the passageway. In particular, if the temperature is low, the operation stop time will be extended, and the water bottle will gradually grow into a large block of ice. In order to remove this ice block during defrosting, the defrosting performance guarantee heater 15 described above is required.

Therefore, during defrosting, both the defrosting tube heater 13 and the defrosting performance guaranteeing heater 15 are energized, resulting in an increase in the amount of power consumption required for defrosting. Also,
- There is also a problem in that the parts cost of the defrosting performance preservation heater 15 and the processing cost for its installation are costly.゛ [Object of the Invention] In order to improve the above-mentioned problems, the present invention improves the defrosting performance by efficiently applying the heat rays radiated from the defrosting tube heater to the radiated area around the cooler. The purpose is to remove the heater.

[Summary of the invention]

That is, the surface of a conductive member such as an aluminum plate attached to a cold air return passage from a refrigerator compartment provided in a partitioned thermal wall, which is a sheath around the cooler, is painted black.

[Embodiments of the invention]

Hereinafter, a simple embodiment of the present invention will be explained with reference to FIGS. 2 and 3. Note that the same reference numerals in the drawings as in the conventional example indicate the same members, and therefore the description thereof will be omitted.

Reference numeral 17 denotes a heat transfer member such as an aluminum plate attached to the cold air return passage 8 from the refrigerator compartment. The light surface of a portion 17a of the heat transfer member 17, such as an aluminum plate, located near the defrosting pipe heater 13 and relatively susceptible to radiant heat rays is painted black. 8a is the end of the cold air return passage 8 from the refrigerator compartment that is remote from the defrosting tube heater 13.

This cold air passage end 8a is formed so as to easily receive the heat rays emitted from the defrosting tube heater 13, and a heat transfer member 17 such as an aluminum plate with a black surface is pasted on that surface. It is something.

According to this embodiment, the heat rays radiated from the defrosting pipe heater 13 are efficiently transferred to the black surface 1 of the heat transfer member 17 such as an aluminum plate.
The cold air is absorbed in the cold air return passage 8 from the refrigerator compartment by heat conduction, and it becomes possible to heat the inside of the cold air return passage 8.

In addition to heat conduction, the cold air passage end 8a absorbs radiant heat and is sufficiently heated.

〔Effect of the invention〕

As explained above, the present invention has a radiant-type defrosting pipe heater at the bottom of the cooler, and this defrosting pipe heater is installed facing the cold air return passage from the refrigerator compartment. In a refrigerator in which a conductive member such as an aluminum plate is disposed in a part of the cold air return passage to transmit heat from the defrosting tube heater to the frosted part of the cold air return passage by conduction, radiant heat is transferred to the conductive member. Since the surface treatment has been applied with black coating to facilitate the absorption of heat, the heat rays radiated from the defrosting circular tube heater can be efficiently used to heat the cold air return passage, which was previously required. The defrosting performance guarantee heater can be removed. Therefore, it is possible not only to reduce the power consumption required for defrosting, but also to significantly reduce costs.

In addition, among the surfaces of aluminum plates etc. pasted on the cold air passages,
Since the portions that are more likely to receive radiant heat from the defrosting tube heater are painted black, the portions that are more likely to be frosted can be heated more efficiently and extra than the portions that are not painted black.

Furthermore, since a surface that is susceptible to radiant heat is created at the end of the cold air passage away from the defrosting pipe heater and a black aluminum plate or the like is pasted on that surface, it is possible to Even in a place relatively far away from the defrosting pipe heater, it can heat more than others, so it is very effective for removing 1M.

[Brief explanation of the drawing]

Figure 1 is a vertical sectional view of the main parts of a refrigerator with a conventional structure, Figure 2
The figure is a longitudinal cross-sectional view of essential parts of a refrigerator equipped with the structure of the present invention. 1... Refrigerator body, 2... Freezer compartment, 3... Refrigerator compartment, 4... Freezer compartment door, 5... Refrigerator compartment door, 6... Partitioning thermal wall, 7... Freezer Room cold air return passageway, 8...
Cold air return passage from the refrigerator compartment, 8a... End of the cold air return passage 8 from the refrigerator compartment, 9... Cooler, 10... Internal fan, 11... Fan guard, 12 ...Gutter, 12
a...Gutter drain pipe, 13...Defrosting pipe heater, 14
... Roof, 15... Heater for guaranteeing defrosting performance, 16.
... Protective cover, 17... Conductive member, 17a... Black surface portion of the conductive member. Agent Patent Attorney Akio Takahashi

Claims (1)

[Claims] 1. A radiant defrosting tube heater is provided at the bottom of the cooler, and this defrosting tube heater is installed facing the cold air return passage from the refrigerator compartment, and the cold air return In a refrigerator in which a conductive member such as an aluminum plate is disposed in a part of the cold air passage to conduct heat from the defrosting pipe heater to the frost forming part of the cold air passage, radiant heat is transferred to the conductive member. A refrigerator that is characterized by a surface treatment that facilitates absorption. 2. The refrigerator according to claim 1, wherein the surface of the conductive member, such as an aluminum plate, located in a location that is likely to receive radiant heat from the defrosting tube heater is black. 3. A surface that is susceptible to radiant heat is created at the end of the cold air return passage away from the defrosting tube heater, and the surface of the conductive material such as an aluminum plate attached thereto is made black. A refrigerator according to claim 1.