JPH01306787A - Production of ice containing ozone - Google Patents

Abstract

PURPOSE:To dissolve much amount of ozone and prevent the releasing of the same upon freezing, by a method wherein ozone is dissolved into cold water, cooled to a temperature immediately before the freezing point, and, thereafter, the water is cooled to a temperature below the freezing point and ozone is dissolved further while shock is applied on the supercooled water to freeze it. CONSTITUTION:Material water in a cooling tank 1 is cooled by a first cooler 24a to a temperature immediately before the freezing point (0 deg.C) and ozone is supplied from a supplying pipe 31 while the cold water in the tank 1 is circulated through a circulating pipe 7 to promote the dissolution of ozone. The cold water, supplied into a supercooling unit 10 through an inflow port 11, is cooled to a temperature below the freezing point or -3 deg.C, for example, and ozone is dissolved further through the supplying pipe 32. When the cold water is dropped to the bottom of an ice producing tank 41, the supercooled water containing ozone is frozen instantaneously by shock. The ice is compressed by the tip end of a forming rod 42 to form cubic ice, for example, whereby high-density ice may be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a method for producing ice containing ozone.

(Prior Art) Various proposals have been made regarding methods for producing ozone-containing ice, which generates ice that is effective for cooling food storage, drinking water, etc. by incorporating ozone (03), which has excellent sterilization and deodorizing effects, into water. is being done.

For example, Japanese Patent Publication No. 42-23758 discloses an ozone system that deaerates raw water to remove nitrogen, cools the raw water to dissolve ozone, and then sends this cold water to an ice-making process. A method for producing ice containing ice is disclosed, and JP-A-60-29569 discloses a method for producing ozone ice in which ice is produced by spraying cold water containing ozone into an evaporator of a cooling circuit. ing.

(Problem to be solved by the invention) However, in all conventional manufacturing methods, the raw water is simply cooled to around the freezing point (0°C) and ozone is dissolved in the cold water, so the solubility of ozone is low, and There is a problem in that the temperature of the cold water rises until the process reaches the stage, releasing ozone and reducing its solubility. In the latter case, ozone in the cold water is released when ozone-containing cold water is sprayed into the evaporator, and since it takes time to make ice, ozone in the cold water is released and its solubility is significantly reduced. There was a problem.

The present invention has been made in view of the above problems, and provides a method for producing ozone-containing ice that can increase the solubility of ozone in raw water and prevent the release of ozone during ice making. The purpose is to

(Means for Solving the Problems) In order to achieve the above object, the present invention cools raw water just before the freezing point, dissolves ozone in the cold water, cools the cold water below the freezing point, and adds ozone to the supercooled water. The feature is that the supercooled water is melted, and the supercooled water is subjected to impact to freeze.

(Function) According to the present invention, the raw water is cooled stepwise to just before the freezing point and below the freezing point, and ozone is dissolved at each cooling stage, so that a large amount of ozone is dissolved into the raw water at the same time as cooling. It turns out. Furthermore, since ice is formed by applying shock to the supercooled water, ice is made instantaneously, so no ozone is released during ice making.

(Example) An embodiment of the present invention will be described below with reference to the drawings.

Figure 1 shows an ozone-containing ice manufacturing apparatus. In the figure, 1 is a cooling tank, 10 is a supercooling section, 20 is a cooling circuit, 30 is an ozone generator, 40 is an ice generation section, and 50 is a water storage section. be.

The cooling tank 1 is made of a material with high ozone resistance, such as stainless steel, and has an internal space capable of storing cold water. A feeding vibrator 4 for feeding raw water is connected to the upper part of the cooling tank 1, which sequentially interposes a purifier 2 equipped with a filter 2a and a denitrification device 3. The feeding vibe 4
A spray nozzle 5 is installed at one end protruding into the cooling tank 1.
is attached, and the other end is connected to a water faucet, etc. Furthermore, circulation vibrators 7 with circulation pumps 6 interposed therebetween are connected to the cooling tank 1 at upper and lower positions thereof.

The supercooling section 10 is formed into a hollow cylindrical shape from a material such as stainless steel with high ozone resistance, and has an inlet 1 provided at one end.
1 to the bottom of the cooling tank 1, and an outlet 1 to the other end.
It is equipped with 2.

The cooling circuit 20 includes a compressor 21 , a condenser 22 , an expansion valve 23 , a vib-shaped first cooler 24 a disposed within the cooling tank 1 , and a circuit wound around the outer circumference of the supercooling section 10 . A pipe-shaped second cooler 24b is arranged, and the refrigerant circulating in the circuit cools the first and second coolers.
The coolers 24a and 24b generate heat absorption to cool the water in the cooling tank 1 and the supercooling section 10.

The ozone generator 30 is capable of supplying internally generated ozone from two supply pipes 31 and 32,
One supply pipe 31 is connected to the bottom of the cooling tank 1, and the other supply pipe 32 is connected to the bottom of the supercooling section 10 near the outlet 12. The ozone generator 30 can be manufactured using various well-known manufacturing methods, but an oxygen gas discharge method is preferred because it generates fewer impurities.

The ice generating section 40 is a bottomed ice generating section I! arranged below the outlet 12 of the supercooling section 10 at a predetermined interval.
41, and a molded rod 42 that is slidably disposed along the bottom of the ice generation tank 41, and a through hole 41a for ice discharge is provided at the bottom of one side of the ice generation tank 41. A door 43 that can be opened and closed is provided in the through hole 41a.

The forming rod 42 is reciprocated by a drive device (not shown).

The water storage section 50 is composed of a box-shaped storage tank 51 with an upper opening 51a located below the through hole 41a, and a cooler 52 disposed at the upper part of the storage tank 51.
An ice outlet 51b is provided on one side of the storage tank 51,
Further, the ice outlet 51b is provided with a door 53 that can be opened and closed. Further, a cooling circuit (not shown) is connected to the cooler 52, and the inside of the storage tank 51 is cooled to -5°C to -20°C by the cooler 52.

Next, the operation of the manufacturing apparatus will be explained.

After impurities in the water are removed by a filter 2 and nitrogen in the water is removed by a denitrification device 3 from the tap water used as raw material water, the water is sprayed into the cooling tank 1 by a nozzle 5. The raw water stored in this cooling tank 1 is supplied to the first cooler 24.
The supply pipe 3 is cooled just before the freezing point (0°C) at
Ozone supplied through 1 is dissolved. At this time, the circulation pump is operated to circulate the cold water in the cooling tank 1 through the circulation vibrator 7, thereby promoting heat exchange in the first cooler 24a and dissolution of ozone into the cold water.

The above-mentioned ozone-containing cold water is supplied to the supercooling section 10 through the inlet 11, and the cold water is cooled to below the freezing point, for example, -3° C., in the first cooler 24a, and the ozone-containing water supplied through the supply pipe 32 is is dissolved. This supercooling section 1
It is desirable that the flow of cold water in the cooling section 10 be static water, and that the amount of ozone discharged into the supercooling section 10 be set to such an extent that it does not interfere with the supercooling.

The ozone-containing supercooled water that falls from the outlet 12 of the supercooling section 10 to the bottom of the ice generation tank 41 instantly freezes due to the impact when it hits the bottom. Since the ice generated here is of low density, the ice of low body density is then slid at the tip of the molding rod 42 and compressed into a square shape, for example, to convert it into high density ice. . Then, this high-density ice is dropped into the water storage tank 51 through the through hole 41a of the ice generation tank 41. This ice is cooled and stored in the ice generation tank 41, so if necessary, the door 53 is opened and the ice inside is taken out and used.

According to this embodiment, the raw water is cooled just before the freezing point in the cooling tank 1 to dissolve ozone in the cold water, and then the cold water is cooled to below the freezing point (-3°C) in the supercooling section 10. Since ozone is further dissolved by supercooling, a large amount of ozone can be dissolved into the raw water at the same time as cooling. In addition, since ozone-containing supercooled water is dropped from the outlet 12 of the supercooling section 10 to the bottom of the ice generation tank 41 and is frozen by applying a shock to the supercooled water, ice is made instantaneously. Ozone is not released during ice making, and ice containing high concentration of ozone can be produced.

FIG. 2 shows another embodiment of the ice generating section, which is different from the embodiment described above, in which a valve 13 is connected to the outlet 12 of the supercooling section 10.
A water conduit 14 is provided to guide the supercooled water to the bottom of the ice generation bath 41 without impacting it, and a hammer 44 driven by a drive device (not shown) is provided in a part of the ice generation bath 41 and is rotatable. It differs in that it is set in

In this embodiment, when ice is generated, the valve 13 is opened for a certain period of time, supercooled water is gently flowed out from the conduit 14 of the supercooling section 10, and a predetermined amount is stored in the ice generation tank 41.
The supercooled water is instantly frozen by the impact, and although the method of impacting the supercooled water is different from that of the above embodiment, it is possible to achieve the same effect as described above.

(Effects of the Invention) As explained above, according to the present invention, raw water is cooled stepwise to just before the freezing point and below the freezing point, and ozone is dissolved at each cooling stage, so a large amount of ozone is released at the same time as cooling. It can be dissolved in raw water to increase the solubility of ozone.

In addition, since ice is formed by applying shock to supercooled water containing ozone, ice is made instantaneously, so no ozone is released during ice making, making it possible to produce ice containing high concentrations of ozone. can.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram of an ozone-containing ice production apparatus according to the present invention, and FIG. 2 is a side view of essential parts showing another embodiment of the ice generation section. 1... Cooling tank, 10... Supercooling section, 20...
cooling. Circuit, 30... Ozone generator, 40... Ice generation section,
50... Water storage section. Patent applicant Sanden Co., Ltd. agent
Patent Attorney Yoshi 1) Yoshitaka

Claims (1)

[Claims] The method is characterized in that the raw water is cooled just before the freezing point, ozone is dissolved in the cold water, the cold water is cooled below the freezing point, the ozone is dissolved in the supercooled water, and the supercooled water is subjected to a shock to freeze. A method for producing ozone-containing ice.