JPH10152200A - Device for manufacture of cold water - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform the stable mass-production of cold water close to 0 deg.C at a low price. SOLUTION: Water 15 to be cooled is fed from a water ejection port 9 into a container 1, ice grain 16 is fed from an ice grain feed device 13, the turning flow 14 is formed in the container 1 using the jet flow of water 15 to be cooled, and the mixed liquid of water 15 to be cooled and ice grain 16 is generated. The mixed liquid is circulated in the container 1 through a static mixer 5, and ice grain is melted at two parts in the container 1 and the static mixer 5 to make cold water. When the temperature of cold water to be extracted from the static mixer 5 reaches close to 0 deg.C, a valve 6 is opened to take cold water to the load side. Melting of ice grain is greatly promoted, and cold water of large volume close to 0 deg.C can be continuously and stably manufactured.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of mixing water and ice particles (or sherbet ice) to form ice particles (or sherbet ice).
And a chilled water producing apparatus for producing chilled water near 0 ° C. by melting.

[0002]

2. Description of the Related Art As a method for producing cold water at about 0 ° C. for air conditioning and cooling food, a so-called dynamic ice is conventionally produced by mixing ice particles and water to be cooled and melting the ice particles to produce cold water. A heat storage method is known, and specific methods include the following. (1) Ice particles produced by other means are put into water in a water tank, and cold water is extracted while spraying water in a shower form from the upper part of the water tank.

There are the following methods for producing ice particles. (A) An ice block produced by an ice machine is crushed by an ice crusher or the like to produce ice particles. (B) Water is applied to the surface of the metal plate cooled to 0 ° C. or lower to form an ice film, and this is mechanically scraped to obtain ice particles (flake ice method).

(C) Ice is applied to the surface of a metal plate cooled to 0 ° C. or less to generate a large number of independent ice particles, and then the ice making surface is brought to 0 ° C. by means such as reversing the refrigeration cycle. Heat to release ice. (2) Fine ice particles are directly generated in the water in the water tank to form a sherbet-shaped mixed solution, and the cold water is extracted while spraying the water to be cooled in a shower form from the upper part of the water tank.

There are the following means for producing a sherbet-like mixture. (I) Supercooling water is jetted out to hit a baffle plate, and a part of the ice is finely frozen (a sherbet method). (Ii) A refrigerant liquid is directly ejected into water to evaporate it, or a liquid medium such as oil insoluble in water cooled to 0 ° C. or lower is charged to generate fine ice particles directly in the water. (3) The sherbet-shaped mixture obtained by the above method (2) is sent to a heat exchanger by a pump to exchange heat with water to be cooled to obtain cold water.

[0006]

However, according to the conventional cold water producing apparatus, in the above methods (1) and (2), an ice particle layer which is gathered upward by buoyancy and is almost stationary is formed from above. Since only cooling water is sprayed, it is difficult to uniformly flow the cooling water around the ice particles. In addition, ice in a portion corresponding to a water flow coming out of the shower is preferentially melted and a specific path is easily formed, so that it is difficult to obtain a large amount of cold water close to 0 ° C.

In the above method (3), it is easy to obtain relatively high temperature (for example, 7 ° C.) cold water for cooling or the like, but to obtain cold water close to 0 ° C., the temperature difference is small. Extremely large heat exchangers are required. Therefore, an object of the present invention is to provide a cold water producing apparatus capable of obtaining a large amount of cold water close to 0 ° C. stably and at low cost.

[0008]

As is clear from the above,
According to the present invention, a container to which ice particles and water to be cooled are supplied, and circulating water in which the water to be cooled or water in the container is circulated is jetted into the container to form a swirling flow, Swirling flow forming means for generating a mixed liquid of ice particles and the water to be cooled,
A static mixer that is connected to the container and is supplied with the mixed liquid extracted from the container and melts ice particles in a process of passing through the inside to generate cold water, and the output water of the static mixer as the circulating water. And a circulation system for returning to the container.

According to this configuration, the ice particles and the water to be cooled are mixed by the swirling flow in the container, ice and water are always coexisting in the container, and the mixed liquid extracted from the container is statically mixed. The ice particles are supplied to a mixer and melted in the mixer. Therefore, melting of ice particles is greatly promoted, cold water at around 0 ° C. is efficiently obtained, and a large amount of cold water can be stably obtained.

[0010] The swirling flow forming means may be a water jetting port provided on a side wall of the container, for jetting the mixed liquid and rotating the mixed liquid in an inner circumferential direction of the container. According to this configuration, the jet of the water jet port is directed toward the inner wall of the container, and the jet is rotated so as to stir the ice particles in the container and the water to be cooled only by pumping the water to be cooled into the container. I do. Therefore, a swirling flow can be formed without providing a stirring device, and the size and cost of the device can be reduced.

The above object is also achieved by a sherbet ice supply device for producing or storing sherbet ice, and the sherbet ice and cooling water supplied from the sherbet ice supply device and supplied to the sherbet in a process of passing through the inside. This is also achieved by a configuration including a static mixer that melts ice to generate cold water. According to this configuration, the sherbet-like mixed liquid is supplied to the static mixer by mixing the sherbet ice and the water to be cooled, and the sherbet ice is finely divided in the static mixer, so that it is easily melted, and the simple configuration is achieved. Thereby, cold water at around 0 ° C. can be obtained. At this time, by appropriately adjusting the mixing ratio of the sherbet ice and the water to be cooled, the temperature is stably set to 0 ° C.
Nearby cold water can be obtained.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a system diagram (a part of which is shown in a sectional view) showing a first embodiment of a cold water production apparatus according to the present invention. The upper portion of the cylindrical container 1 is opened, and a mixed liquid extraction port 2 for extracting a mixed liquid of ice particles and water is provided on a central wall surface, and a pipe 3a is connected to the mixed liquid extraction port 2. A pump 4 and a static mixer 5 are sequentially provided in the middle of the pipe 3a. The static mixer 5 is installed vertically (vertically), and circulating water is supplied from below. When the static mixer 5 is placed horizontally, buoyancy acts on the ice particles, and the ice particles are unevenly distributed to hinder the flow of the liquid, which is not preferable. If the static mixer 5 is erected and the mixed liquid is supplied from below, the ice particles in the mixed liquid move upward by buoyancy, so that the ice particles can easily pass through the mixer. Since the cooling water passing through the inside of the pump 4 contains ice particles, the pump 4 is a screw pump or the like that is suitable for pumping solid mixed liquid.

A pipe 3b is connected to an end of the pipe 3a,
Valves 6 and 7 are provided on both sides thereof. Valve 6
Outputs cold water. Further, a pipe 8 is provided between the valve 7 and the container 1, and an end of the pipe 8 is provided at a lower portion of a side wall of the container 1 with a water ejection port 9 (a swirl flow forming means).
It is connected to the. The water ejection port 9 is attached at an angle at which the water to be cooled ejected along the inner wall of the container 1 can rotate in the circumferential direction. The pipes 3a, 3b, 8,
A circulation system is formed by the pump 4, the static mixer 5, and the valve 7.

Further, a pipe 10 for supplying cooling water is connected to the pipe 8, and a valve 11 is provided on the way. An ice particle chute 12 is installed diagonally above the container 1, and an ice particle supply device 13 is installed above the ice particle chute 12. Next, the operation of the chilled water production apparatus having the configuration shown in FIG. 1 will be described. The ice particle supply device 13 makes ice using electric power at night or the like and stores the ice. First, the valve 11 is opened while the valves 6 and 7 are closed, and the water to be cooled 15 is jetted from the water jet port 9 into the vessel 1 through the pipes 10 and 8. The valve 11 is closed when the water to be cooled in the container 1 is injected above the position of the mixed liquid extraction port 2. Next, the valve 7 is opened, the pump 4 is operated, and the water to be cooled in the container 1 is circulated through the route of the mixed liquid extraction port 2 → the pump 4 → the static mixer 5 → the valve 7 → the pipe 8 → the water ejection port 9. . At this stage, a predetermined amount of ice particles 16 is supplied from the ice particle supply device 13 into the container 1 via the ice particle chute 12. At this time, not only the water to be cooled but also a mixed liquid containing ice particles is flowing through the pump 4 and the static mixer 5.

The cooling water jetted from the water jetting port 9 is:
Due to its kinetic energy and pressure energy, the container 1
The swirling flow 14 is formed by swirling the inside, and the water 15 to be cooled and the ice particles 16 are stirred. Thus, the cooling water 1
By forcibly stirring the mixture of the ice particles 5 and the ice particles 16, the relative movement speed between the ice particles and the surrounding water is increased, the heat transfer coefficient on the ice particle surface is improved, and the melting of the ice particles is prevented. Greatly promoted.

When the mixed liquid passes through the static mixer 5, ice particles in the mixed liquid can move to the upper part by buoyancy because the static mixer 5 is installed vertically.
Therefore, the ice particles are melted while passing through the static mixer 5 and become cold water at a predetermined temperature. In this way, in addition to the water cooling by stirring in the container 1, further water cooling is achieved.

When the cold water (circulating water) output from the static mixer 5 reaches a set value (around 0 ° C.), the supply of ice particles and the water to be cooled is restarted (the opening operation of the valve 11 and the ice particle supply device 13). ) And the valve 6 is opened, and the obtained cold water is sent to the load (air conditioner, food production equipment, etc.). At this time, the opening of the valve 7 (that is, the amount of circulating water) is appropriately adjusted according to the state of the load. The supply amount of the water to be cooled and the ice particles and the extraction amount of the cold water are controlled such that the temperature of the cold water is kept at a set value and the level of the mixed liquid of the water and the ice particles in the container 1 is constant. .

The mixed liquid of ice particles and water in the container 1 is water (water to be cooled and reflux water) jetted tangentially to the inner wall surface of the container 1.
Orbit by the kinetic energy and pressure energy of
Since the mixture is stirred by the three-dimensional flow generated thereby, the melting of the ice particles in the container 1 is promoted, and the ice particles in the mixture are dispersed. The ratio of ice particles becomes stable. The static mixer 5 has a capacity such that ice particles in the passing mixture completely melt inside.

FIG. 2 is a system diagram (a static mixer is shown in a sectional view) showing another embodiment of the cold water producing apparatus according to the present invention. In FIG. 2, the same reference numerals are used for the same components as those in FIG. 1, and therefore, duplicate description will be omitted below. As described above, there is a sherbet method as a means for obtaining cold water. In the conventional sherbet method, fine ice particles were directly generated in water in a water tank to form a sherbet-like mixed solution, and cold water was extracted while spraying water to be cooled in a shower form from the upper part of the water tank. . However, since only the water to be cooled is sprayed from above on the ice particle layer in a stationary state, it is difficult to uniformly flow the water to be cooled around the ice particles, and the ice in the portion that hits the water flow has priority. It was easy to form a specific pass, and it was difficult to obtain a large amount of cold water close to 0 ° C.

On the other hand, in the configuration of FIG. 2, the sherbet ice supply device 17 and the static mixer 5 are combined,
A mixture of sherbet ice and water to be cooled is supplied to the static mixer 5 so that the sherbet ice is melted in the static mixer 5. That is, the pipe 18 is connected to the sherbet ice supply device 17, and the pump 4 and the valves 19 and 11 are sequentially provided in the middle thereof. The static mixer 5 is connected between the valve 19 and the valve 11, a pipe 20 is connected to an outlet side thereof, and the valve 6 is provided in the middle of the pipe 20.

The operation of the chilled water producing apparatus shown in FIG. 2 will be described. The valves 11 and 6 are opened to supply water to be cooled to the standing static mixer 5 from below. At the same time, the valve 19 is opened and the sherbet ice supply device 17 and the pump 4 are operated to supply sherbet ice from the sherbet ice supply device 17 to the static mixer 5. Thus, the mixed liquid of the sherbet ice and the water to be cooled is supplied to the static mixer 5. In the course of the mixture passing through the static mixer 5, the fine ice particles in the mixture are easily melted, and the water to be cooled is cooled. At this time, by appropriately adjusting the mixing ratio of the sherbet-shaped mixed liquid and the water to be cooled, it is possible to stably and continuously obtain cold water at about 0 ° C. In addition, the cold water production device can have an extremely simple configuration.

[0022]

As described above, according to the present invention, ice particles and water to be cooled are mixed in a container by a swirling flow, and the mixed liquid extracted from the container is supplied to a static mixer to melt the ice particles. Since it is performed, cold water at around 0 ° C. can be efficiently obtained, and a large amount of cold water can be continuously and stably obtained.

In the present invention, the sherbet ice and the water to be cooled are mixed to form a sherbet-like mixed liquid by a static mixer, and the cold water is obtained by melting the sherbet ice. Can be generated. In addition, the chilled water production device can have a very simple configuration.

[Brief description of the drawings]

FIG. 1 is a system diagram showing a first embodiment of a cold water producing apparatus according to the present invention.

FIG. 2 is a system diagram showing a second embodiment of the chilled water production apparatus according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Container 2 Mixed-liquid extraction port 3a, 3b, 8, 10, 18 Piping 5 Static mixer 7, 11, 19 Valve 9 Water ejection port 13 Ice particle supply device 14 Swirling flow 15 Cooling water 17 Sherbet ice supply device

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Toshio Yoshida 2-1, Nakayama 7-chome, Aoba-ku, Sendai, Miyagi Prefecture Tohoku Electric Power Company R & D Center (72) Inventor Aritaka Tatsumi Kida Yomachi, Tsuchiura City, Ibaraki Prefecture 3550 Hitachi Cable Co., Ltd.

Claims (3)

[Claims] 1. A container to which ice particles and water to be cooled are supplied, and circulating water in which the water to be cooled or water in the container is circulated is jetted into the container to form a swirling flow, A swirling flow forming means for generating a mixed liquid of particles and the water to be cooled; and the mixed liquid extracted from the container connected to the container is supplied, and ice water is melted in a process of passing through the inside to produce cold water. And a circulating system for returning output water of the static mixer to the container as the circulating water. 2. A water jet port provided on a side wall of the container, wherein the swirl flow forming means is a water jet port for jetting the mixed liquid and rotating the mixed liquid in an inner circumferential direction of the container. Cold water production equipment. 3. A sherbet ice supply device for producing or storing sherbet ice, and sherbet ice and water to be cooled supplied from the sherbet ice supply device are supplied to melt the sherbet ice in a process of passing through the inside. An apparatus for producing cold water, comprising: a static mixer that generates cold water.