JPH0428981A - Refrigerator and ice making tray - Google Patents

Abstract

PURPOSE:To make impurity vaporize outside and to enable making transparent ice by providing an ice making tray which is opened in an upper surface, containing water inside and having a heating means at an upper part. CONSTITUTION:When a heater wire 12 provided on the whole periphery of an ice making tray flange part 9a is turned ON, the heater wire 12 generates heat to heat an upper part of an ice making tray 9 and also transmits heat to an elastic thermal conductor 13 provided around the heater wire 12 to heat the upper part of the ice making tray 9, whereby water supplied into the ice making tray 9 is heated. As to cooling of the ice making tray 9, congelation starts from a lower part of the tray 9 because cool air is made to flow only to the lower part and proceeds to its upper part, where the congelation finishes. In this constitution, as the heater wire 12 is provided on the ice making tray 9, ice making time is prolonged, and further as the upper part of the tray 9 is heated, chlorine, bleaching powder and the like dissolve from inside of the water and go outside. Thus congelated ice includes little impurity and is very transparent.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is based on an automatic ice making device disposed in a refrigeration base circle.
It concerns a refrigerator-freezer that makes transparent ice.

[Conventional technology]

FIG. 6 is shown in, for example, Japanese Utility Model Application Publication No. 57-11681. In Figure 91, which is a partially cutaway perspective view of the freezer compartment of a conventional refrigerator with an automatic ice-making device, (1) is the refrigerator main body, and the interior thereof is divided into two parts: the freezer compartment (3) and the refrigerator compartment (4). ) and are divided into sections. (5) is the freezer compartment door.

(6) is the refrigerator compartment door. (7) is an automatic ice making device, (8
) is an automatic ice making device (7).K is a water storage box that stores the ice cubes made by K. Both of them are installed in the freezer compartment +31.

(9) is an ice tray made of a flexible material that supplies water to make ice cubes, Q[I is the drive motor, α11 is the drive motor a
This is a decorative cover that covers the mechanical part of an automatic ice making device such as a.

Next, the operation will be explained. Ice making tray (91K The supplied water is cooled in an ice making tray made of flexible material, and is twisted by the drive motor frame for each ice making cycle. #Ice is removed from the ice tray and installed at the bottom of the ice making tray. The ice falls into the water storage box (8) and is stored there.

Also, Fig. 7 and Fig. 8 are the actual Sho 5a-tea574, respectively.
This is an ice making device using a conventional heater disclosed in Japanese Utility Model Application Publication No. 1-114880.

A heater az is provided at the top or bottom of an ice tray (9) made of a flexible material, and in FIG. 1, the heater ag brings the opening edge of the top surface of the ice tray into close contact with the top surface of the outer periphery of the heater. In FIG. 8, a heater a3 is attached to the outer surface of the bottom of the ice tray (9), and its periphery is covered with a heat insulating material.

In Figures 7 and S, the heaters are energized and the 7th
The figure shows ice cubes from the top of the ice tray, and Figure 8 shows ice from the bottom to make transparent ice.

[Problem to be solved by the invention]

Since the conventional automatic ice making apparatus is constructed as described above, there is no problem in making ordinary ice, but it has not been possible to make clear and delicious ice. Furthermore, in the conventional device for making transparent ice using a heater, water remains at the bottom of the ice tray, which is not suitable for automatic ice making. Additionally, there was a problem in that the ice tray could not be rotated if the heater was placed close to the top surface.

This invention was made to solve the above-mentioned problems, and it is an object of the present invention to enable an automatic ice-making device to produce transparent and delicious ice.

[Means to solve the problem]

The ice tray according to the first aspect is an ice tray for a refrigerator that has an open top surface and stores water therein, and is provided with heating means at the top.

A refrigerator according to a second aspect of the present invention is equipped with an automatic ice-making device that inverts the ice-making tray according to the first aspect to release ice.

[Effect]

The upper part of the ice tray is heated when it is frozen, so the water in the ice tray freezes from the bottom layer, and the final frozen part becomes the upper layer at the opening of the ice tray.Therefore, impurities evaporate to the outside, making it transparent. You can make ice.

Refrigerators can automatically remove clear ice from ice trays and store water.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 to 5. Reference numerals (1) to a11 indicate the same or equivalent parts as in the conventional device, and their explanations will be omitted. In the figure (9a) is a U-shaped 7 provided around the entire circumference of the ice tray (9).
Lunge part, QX5 is ice tray flange part (9a) FF3
1C is a heater wire, and 01 is a good thermal conductor with elasticity installed around the heater @ CaO so as to efficiently conduct the heater heat (to the ice tray (9)) and press the heater wire α2 to the ice tray (9). , α knob is a U-shaped holder for fixing the heater wire C13 and the thermal conductor α:l'Jk to the ice tray 7 flange portion (9a).Next, the operation will be explained.Ice tray flange portion (9a)
When the heater wire α2' provided around the entire circumference is turned on by an external switch (not shown), the heater chain 3 generates heat and warms the top of the ice tray (9), and the heater wire α2' provided around the heater wire α2 generates heat. Heat is also transferred to the thermal conductor 03, which has good elasticity, and warms the upper part of the Kg ice tray (9) as well as the heater wire α2, and this heat warms the water supplied to the ice tray (9). The cooling of the ice tray (9) is designed so that cold air flows only to the bottom of the ice tray (91), so freezing starts from the bottom of the divided chamber of the ice tray (9) and progresses to the upper part.
The final frozen part becomes the upper part of the ice tray (9).

By providing the heater wire 03t on the ice tray (9), the ice making time becomes longer, and the upper layer is heated by the heater, so that chlorine, limescale, etc. are decomposed from the water and escape to the outside. Therefore, the frozen ice becomes highly transparent and delicious ice with fewer impurities than conventional ice. Note that the heater is turned off after a certain period of time.

In the above embodiment, a good thermal conductor a1d having elasticity is provided around the heater wire az, but the same effect can be achieved by using only the heater wire α2 by increasing the heat generation i1 of the heater wire α2.

〔Effect of the invention〕

The ice-making tray of claim 1 is an ice-making tray for a refrigerator that has an open top and stores water therein, and is configured to include a heating means at the top, so that the top is heated during ice making. The water in the tray freezes from the lower layer, and the final frozen portion becomes the upper layer at the opening of the ice tray. Therefore, impurities evaporate to the outside, making it possible to make transparent ice.

The refrigerator according to the second aspect is equipped with an automatic ice-making device that inverts the ice-making tray according to the first aspect to release ice, so that it has the effect of automatically storing transparent ice.

[Brief explanation of the drawing]

FIG. 1 is a plan view of an embodiment of the ice tray of the present invention, FIG. 2 is a longitudinal sectional view of the center of the plan view, FIG. 3 is a cross-sectional view of the center of the plan view, and FIG. 4 is a partially enlarged view of the same. FIG. 5 is a configuration diagram of the heater section, FIG. 6 is a partially cutaway perspective view of a conventional refrigerator with an automatic ice making device, and FIGS. T and 8 are sectional views of essential parts of a conventional ice making tray. In the figure, (9) is an ice tray, and a3 is a heater wire (heating means). In each figure, the same reference numerals omit the same or corresponding parts.

Claims (2)

[Claims] (1) An ice tray for a refrigerator that has an open top and stores water inside, and is characterized by having a heating means on the top. (2) A refrigerator comprising an automatic ice-making device that inverts the ice-making tray according to claim 1 to release ice.