JPS6027880Y2 - ice machine - Google Patents

Description

[Detailed explanation of the invention] This invention relates to an ice making machine that freezes ice making raw water (hereinafter simply referred to as ice making water) in an ice making tank to make block ice.
In particular, the purpose is to obtain transparent block ice by delaying freezing from the water surface of an ice making tank and promoting ice growth from the bottom surface.

Generally, the specific gravity of water reverses at 4°C.

That is, the specific gravity is highest at 4°C, and becomes smaller at temperatures above or below 4°C.

During the ice making process, low temperature (water close to 0°C) is placed at the top of the ice making tank.
of water gathers at the bottom, and at the bottom there is a high temperature (close to 0℃, but the above-mentioned 0℃
(meaning hotter than) water gathers.

It is well known that for this reason, water begins to freeze from the surface.

When the water surface freezes, the air dissolved in the water becomes trapped in the water, and when it freezes, it becomes air bubbles and disperses in the water, forming what is called white water (opaque ice).

Therefore, in the production of ice cubes, an air blowing tube is usually placed in the ice making water to supply air to produce air bubbles to agitate the ice making water to prevent freezing from the water surface and obtain transparent ice.

This proposal further promotes the growth of transparent ice by modifying the piping of the refrigerant evaporation tube to the ice making tank.

An embodiment of the present invention shown in the drawings will be described below.

Reference numeral 1 denotes the main body of the ice making machine, and the main body has an ice making tank 2 in the upper part and a machine room 3 in the lower part.

4 is a door body that opens and closes the top opening of the ice making tank 2, and a heat insulating material 5
At the same time, a door seal 6 is attached to the inner peripheral edge.

Furthermore, the ice making tank 2 has an outer box 7 and refrigerant evaporation pipes 8, 8 and 8 on the outer surface.
... and an inner box 10 equipped with deicing electric heaters 9, 9..., a synthetic resin mouth-shaped frame 11 connecting the upper opening edge of the outer box 7 and the inner box 10, and It is composed of a foamed heat insulating material 12 filled between the boxes 7 and 10.

In the machine room 3, a refrigerant compressor 13, a condenser 14, and an electric blower 15 for cooling the condenser, which together constitute a refrigeration cycle, are arranged and housed.

The refrigerant evaporation tubes 8, 8, . The ice-making water is wrapped around the inner box 10 so that the ice-making water is positioned below the specified water level.

Reference numeral 18 denotes a support plate removably installed on the inner circumferential step 19 of the mouth-shaped frame body 11. The support plate is connected to an air pump 20 built in the door body 4 via a bellows-like gasket 21, and is submerged in ice making water. An air blowing pipe 22 for supplying air and a pair of ice removers 23 are attached to both sides of the blowing pipe.

In the above configuration, when water is poured into the ice making tank 2 up to the specified level of ice making water, the refrigeration cycle is operated to perform a cooling effect, and air is supplied to the ice making water via the air blowing pipe 22 by the air pump 20, transparent ice cubes are formed. I can do it.

In other words, since the refrigerant is introduced from the bottom of the ice-making tank 2 and is returned from the top of the ice-making tank 2, freezing from the water surface is delayed and ice growth from the bottom is promoted, resulting in air blowing. Together with the air supply from the pipe 22, the air can be easily expelled from the ice-making water.

After ice making is completed, the ice making surface rises to the dotted line position due to volume expansion.

As mentioned above, the ice making machine according to the present invention includes an ice making tank that freezes ice making water, a door body that opens and closes the top opening of the ice making tank, and an air pump built into the door body that is connected to supply air into the ice making water. The ice-making tank has a refrigerant evaporation pipe having a refrigerant inlet at the bottom and a refrigerant outlet at the top below the specified water level of the ice-making water, so that freezing from the water surface is prevented. This slows down the ice growth and promotes the growth of ice from the bottom, making it easier to expel air from the ice making water and making it possible to efficiently produce transparent ice cubes.

In addition, almost no frost adheres above the specified water level of the ice-making water in the water-making tank, and it is possible to prevent frost from melting during dehydration and falling onto the ice-making surface to form uneven portions.

[Brief explanation of the drawing]

Figure 1 is a perspective view of the proposed ice maker with the door open, Figure 2 is a cross-sectional side view of the main parts during ice making, Figure 3 is a cross-sectional view showing the relationship between the refrigerant evaporation pipe and the inner box, and Figure 4. FIG. 2 is a side view showing a cross section of the main part of the ice making tank. 2... Ice making tank, 4... Door body, 8. Death・
... Refrigerant evaporation tube, L ... Standard water level of ice making water,
20... Air pump, 22... Air blowing pipe.

Claims (1)

[Scope of utility model registration request] It consists of an ice making tank that freezes ice making water, a door body that opens and closes the top opening of the ice making tank, and an air blowing pipe that is connected to an air pump built into the door body and supplies air into the ice making water. An ice making machine characterized in that a refrigerant evaporation tube having a refrigerant inlet side at the bottom and a refrigerant outlet side at the top is arranged in the water tank below the specified water level of the ice making water.