JPH0464883A - Defrosting device for freezing and/or refrigerating chamber - Google Patents

Abstract

PURPOSE:To permit securing of the volume of a cold air passage immediately below a cooler sufficiently and eliminate the direct dripping of water produced by defrosting onto a defrosting heater by receiving the defrosting heater in a recessed part formed on the inner wall surface of the deep side of an inner casing under a condition that the heater is thrown thereinto. CONSTITUTION:A defrosting heater 4 made of a glass tube is received in a recessed part 9a, formed in the inner wall surface of the deep side of an inner casing 9 together with a supporting device 5b formed integrally at the rear part of the opening rim of a tray 5a for receiving water, produced by defrosting, from a cooler 3 under a condition that it is thrown thereinto. Under the receiving condition, the fore end of the defrosting heater 4 is at the rear side than the rear surface of the cooler 3 at all times considering so that dripping water from the cooler 3 will never hit the defrosting heater 4. Water, produced by defrosting frost, adhered to the cooler 3, by heating effected by the defrosting heater 4, drops directly into the tray 5a and will never drop onto the defrosting heater 4. On the other hand, anything which bothers the circulation of cold air is eliminated in a cold air passage A immediately below the cooler 3. A penthouse, covering at least the upper part of the defrosting heater 4, can be provided at the top rim of the recessed part 9a. The defrosting heater is not limited to the glass tube heater.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an improvement in a defrost device for a freezer or refrigerator, which includes a defrost heater provided below a cooler in an inner box.

[Prior Art] Fig. 4, Fig. 5, and Fig. 6 are, for example, those of Utility Model Application Publication No. 60-1.
This figure shows a conventional defrosting device for a freezer/refrigerator disclosed in Publication No. 01670. In these figures, (1) is the main body of the freezer/refrigerator, and (2) is the one located at the upper part of the back inside the refrigerator. The cover for creating the cold air passage (A) is provided with a cold air discharge hole (2a) in the upper part and a cold air return hole (2b) in the lower part. (3) is a cooler in the cold air path located behind this cover, and (4) is a glass tube defrost heater for this cooler, which uses defrost water from the cooler (3). Both ends of the receiving tray (5a) are supported by supports (5b) that are integrally provided at the rear of the opening edge of the receiving tray (5a). (5c) is a heater roof provided on this support (5b), (6) is an insulating air duct plate superimposed and fixed on the back surface of the cover (2), (
7) is an aluminum sheet for heat reflection attached to the lower back surface of the insulating air passage plate (6) facing the defrost heater (4), and (8) is the defrost dripping from the cooler (3). The drain pipe attached to the bottom of the tray to lead water out of the refrigerator, (9) is the inner box of the freezer/refrigerator body, and (10) is attached to the inner wall on the back side of this inner box (9). and the above defrost heater (4
) is an aluminum tape for reflecting the heat of the glass, and (11) is an electric fan for circulating cold air installed directly above the cooler (3).

Next, the operation will be explained. The cold air generated by the cooler (3) inside the freezer body (1) is transferred to the electric fan (1).
1) is sent into the refrigerator from the discharge hole (2a) on the front thereof, and after cooling the inside of the refrigerator, returns to the cooler (3) through the return hole (2b) provided at the bottom of the cover (2). .

This series of cycles cools the food in the refrigerator, but
Moisture absorbed from the food adheres to the cooler (3) as frost, and as this frost grows, the heat exchange efficiency decreases. In order to stop this decrease in heat exchange efficiency, the defrost heater (
4) to heat the cooler (3) and drip the adhering frost into the tray (5a) directly below as defrosting water. In addition, in order to prevent the dripping water from falling directly onto the heated defrost heater (4), the above-mentioned heater roof (5c) is provided, which roughly protects nearby parts from the heat of the defrost heater (4). The above aluminum sheet (7) and aluminum tape (10
) is used for pasting.

[Problems to be Solved by the Invention] Since the conventional defrost device for freezers and refrigerators is configured as described above, the defrost heater (4) and the heater roof ( 5c) is located in a protruding state, which obstructs the circulation of cool air inside the refrigerator, and also causes problems such as abnormal noises when evaporating because the defrosting water drips onto the heater roof, which is heated to a high temperature. Ta.

This invention was made to solve the above-mentioned problems, and its purpose is to ensure sufficient cold air passage volume directly below the cooler and to prevent defrosting water from dripping directly onto the defrosting heater. shall be.

[Means for Solving the Problems] The defroster device for freezers and refrigerators according to the present invention eliminates the heater roof that covers the defrost heater, and also replaces the defrost heater with
The cooler is housed in a recess formed on the inner wall of the inner box that accommodates the cooler so that its front end is located behind the rear surface of the cooler.

[Function] In the defrosting device for a freezer/refrigerator according to the present invention, the defrosting heater is housed in a recessed state formed in the inner wall on the back side of the inner box. There are no obstacles in the way, and there is no chance of defrost water dripping onto the defrost heater.

[Example] An example of the present invention will be described below. That is, in FIGS. 1 and 2, parts that are the same as or equivalent to those of the conventional one are given the same reference numerals, and redundant explanation thereof will be omitted. 4) is a support (4) integrally formed at the rear of the opening edge of the tray (5a) that receives the defrosting water from the cooler (3).
5b), and is housed in a recessed state (9a) formed on the rear inner wall of the inner box (9), and in this stored state, the front end of the defroster heater (4) is closer to the rear surface of the cooler (3) It is characterized in that it is always located at the rear, and care is taken to prevent dripping water from the cooler (3) from hitting the defrost heater (4).

With the above configuration, the defrosting water, in which the frost adhering to the cooler (3) is thawed by the heating by the defrost heater (4), falls directly into the tray (5a) and flows onto the defrost heater (4). It won't fall. Furthermore, there is no obstacle to the circulation of cold air in the cold air passage (A) directly below the cooler (3).

Note that in the above embodiment, no special device is applied to the recess (9a) formed on the inner wall of the inner box (9) on the rear side; however, as in the other embodiment shown in FIG. An eave (A) that covers at least the upper part of the defroster heater (4) may be provided on the top edge of the heater (4). Other defroster heaters are not limited to glass tube heaters.

[Effects of the Invention] Since the defrosting device for freezers and refrigerators of this invention is constructed as described above, defrosting water does not fall directly onto the defrosting heater, and the cold air air path directly under the cooler is prevented from falling directly onto the defrosting heater. This has the effect of eliminating obstructions that impede the circulation of cold air from within.

[Brief explanation of the drawing]

FIG. 1 is a vertical sectional view of a main part showing a defrost device for a freezer/refrigerator according to the present invention, and FIG. 2 is a partially enlarged perspective view showing a support for a defrost heater in a defrost device for a refrigerator/freezer according to the present invention.
FIG. 3 is a diagram corresponding to FIG. 1 showing another embodiment of the present invention;
Fig. 4 is a perspective view of a conventional freezer/refrigerator with the door open, Fig. 5 is a sectional view taken along the line ■-■ of Fig. 4, and Fig. 6 is a partially enlarged perspective view of a support for a conventional defroster heater. It is a diagram. In the figure, (3) is the cooler, (4) is the defroster heater, and (5a)
) is the tray, (5b) is the support, (9) is the inner box, (9a
) is a concave part. In other figures, the same reference numerals indicate the same parts. Figure Figure

Claims (2)

[Claims] (1) A refrigerator equipped with a defrost heater installed below the cooler in the inner box to thaw the frost attached to the cooler, and a tray installed below the cooler to receive defrosting water. - A defrost device for a refrigerator, characterized in that the defrost device for a refrigerator includes a recess formed on an inner wall of the inner box facing the defrost heater to accommodate the defrost heater. (2) The defrosting device for a freezer/refrigerator according to claim 1, wherein the freezer/refrigerator is of a cold air forced circulation type.