JPH05296627A - Heat exchanger for ice crystallization - Google Patents

Abstract

PURPOSE:To provide a heat exchanger for ice crystallization used in an ice crystal maker which can make ice crystal in succession, whose constitution is simple and whose size is minimized. CONSTITUTION:The heat exchanger for ice crystallization is provided with a heat exchanger body having an inlet 2 of water and an outlet 3 of ice crystal, a cooling coil 5 to cool an exterior wall surface of the heat exchanger 1 and a scraping blade 8 to revolve inside the heat exchanger body 1 to make water or ice crystal flow from the inlet 2 to the outlet 3 and also to scrape an interior wall surface of the heat exchanger body 1. By this, ice crystal can be manufactured in succession. Thus the size of the heat exchanger can be minimized, and also there is no need to provide a pump to feed out the ice crystal.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ice crystal heat exchanger used in an ice crystal production apparatus for producing a fluid latent heat storage agent.

[0002]

2. Description of the Related Art A conventional heat exchanger for ice crystals used in an ice crystal production apparatus for producing sherbet-like ice crystals (referred to as latent heat storage agent) that undergo a phase change at about -5 ° C to -25 ° C. An example of is shown in FIGS.

The main body 11 of the heat exchanger has an inlet 12 and an outlet 13 which are respectively connected to the lower portion and the upper portion of the heat storage tank 20, and a pump 14 is provided at the inlet 12. In the main body 11, cooling coils 15 are stacked and installed in multiple stages, and the cooling coils 15 are flat plate-shaped scraping tools 1.
6 are inserted into a large number of holes.

In this conventional heat exchanger, the water 21 in the heat storage tank 20 is driven into the inlet 12 by driving the pump 14.
And then flows into the main body 11 and is filled therein. The water is cooled by exchanging heat with the brine flowing in the cooling coil 15, and fine sherbet-like ice, that is, ice crystals 22, are formed on the outer surface of the cooling coil 15. Subsequently, the ice crystals 22 are scraped from the cooling coil 15 by reciprocating the scraping tool 16 by driving a motor (not shown).

Next, when the pump 14 is driven, the ice crystals 22 scraped off are pushed up by the water 21 flowing from the heat storage tank 20 to move upward in the main body 11 and sent to the heat storage tank 20 from the outlet 13.

Thereafter, by repeating the above steps, ice crystals are produced in the heat exchanger and stored in the heat storage tank 20.

[0007]

In the conventional heat exchanger for ice crystals, the pump 14 is required to introduce water into the main body 11 and to send the ice crystals scraped from the cooling coil 15 to the heat storage tank 20. In addition, since the ice crystals are produced batchwise, the cooling coil 15 installed in the main body 11 becomes large in size, which causes a problem of increased cost.

The present invention is intended to provide a heat exchanger for ice crystals which can solve the above-mentioned problems.

[0009]

A heat exchanger for ice crystals according to the present invention comprises a heat exchanger body having an inlet for water inflow and an outlet for ice crystal outflow, and an outer wall surface of the heat exchanger body. A cooler for cooling and a scraping blade that rotates in the heat exchanger body to cause water or ice crystals to flow from the inlet to the outlet and scrape the inner wall surface of the heat exchanger body It is characterized by

[0010]

Since the present invention has the above-mentioned structure, the following operation is brought about. That is, as the scraping blade rotates, water flows into the heat exchanger body from the inlet, and this water is cooled by the cooler to form ice crystals, which are generated on the inner wall surface of the heat exchanger body. To do. The ice crystals move inside the heat exchanger body while being scraped by the rotation of the scraping blade, and flow out from the outlet. As a result, ice crystals are continuously produced in the heat exchanger.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described with reference to FIG. The body 1 of the heat exchanger has a cylindrical shape, and an inlet 2 is provided at a lower portion of a side portion thereof, and an outlet 3 is provided at an upper portion thereof. The inlet 2 and the outlet 3 are connected to the heat storage tank 20. A cooling coil 5 is wound around the outer wall surface of the main body 1, and a low temperature brine flows through the cooling coil 5. The shaft 7 that is vertically installed in the center of the main body 1 and is driven to rotate by the motor 6 is provided with a screw-type scraping blade 8. When the scraping blade 8 rotates, water or ice crystals are moved downward. It is designed to flow upward from. Further, the outer peripheral end of the scraping blade 8 is arranged so as to come into contact with the inner wall surface of the main body 1 or to have a slight gap.

In the present embodiment configured as described above, when the scraping blade 8 is rotationally driven by the motor 6,
As the scraping blade 8 rotates, the water 2 in the heat storage tank 20
1 flows into the main body 1 through the inlet 2 and flows from the lower part to the upper part in the main body 1 and is cooled by exchanging heat with the brine flowing in the cooling coil 5; That is, it becomes ice crystals 22 and grows on the inner wall surface of the main body 1. The ice crystals 22 are moved upward in the main body 1 while being scraped by the rotation of the scraping blade 8 and fed into the heat storage tank 20 from the outlet 3.

In this way, the water 21 continuously flows into the main body 1 as the scraping blade 8 rotates, and the ice crystals 22 generated on the inner wall surface of the main body 1 are scraped off to store the heat in the heat storage tank 20.
Stored in. Therefore, unlike the conventional heat exchangers shown in FIGS. 4 and 5, a pump for flowing water or ice crystals is not required and the heat exchanger can be downsized.

A second embodiment of the present invention will be described with reference to FIG. In the present embodiment, a scraping blade 8 of the type that combines the flow of water or ice crystals and scraping in the first embodiment is used.
In place of the above, as shown in FIG. 2, propeller-type blades 8a arranged side by side on a shaft 7 driven to rotate by a motor 6
And a scraping blade consisting of a plurality of scraping spatulas 8b attached at several positions on the outer peripheral edge of the blade 8a, water or ice crystals are made to flow by the blade 8a, and the ice crystals are scraped by the scraping spatula 8b. It is the one. Also in this embodiment, the same operation and effect as those of the first embodiment can be obtained.

A third embodiment of the present invention will be described with reference to FIG. In the first embodiment, the heat exchanger body 1
Is installed outside the heat storage tank 20, but in the present embodiment, the heat exchanger body 1 is installed inside the heat storage tank 20. That is, the heat exchanger main body 1 having the same structure as in the first embodiment, including the screw type scraping blade 8 attached to the shaft 7 which is rotationally driven by the cooling coil 5 and the motor 6, is installed in the heat storage tank 2 The heat exchanger main body 1 has an inlet 2 at its lower end and an outlet 3 at its upper end.
Are provided respectively. Further, the outer surface of the cooling coil 5 is covered with a heat insulating material 9 so that the outer surface of the cooling coil 5 is not directly frozen.

Also in this embodiment, the same operation and effect as those of the first embodiment can be obtained.

[0017]

According to the heat exchanger for ice crystals of the present invention, water flows from the inlet into the heat exchanger main body as the scraping blade rotates, and the heat exchanger main body passes through the cooler. Since the ice crystals generated on the wall surface are scraped and allowed to flow out from the outlet, it is possible to continuously produce ice crystals, and as a result, a small heat exchanger can be used to produce a large amount of ice crystals. Well, it is possible to eliminate the need for a conventional pump for flowing water or ice crystals, and it is possible to reduce the cost.

[Brief description of drawings]

FIG. 1 is a schematic cross-sectional view of a first embodiment of the present invention.

FIG. 2 is an external view of a scraping blade according to a second embodiment of the present invention.

FIG. 3 is a schematic sectional view of a third heat exchanger of the present invention.

FIG. 4 is a schematic cross-sectional view of a conventional ice crystal heat exchanger.

FIG. 5 is an external view of a cooling coil of the conventional ice crystal heat exchanger.

[Explanation of symbols]

 1 Heat Exchanger Main Body 2 Inlet 3 Outlet 5 Cooling Coil 6 Motor 7 Shaft 8 Scraping Blade 8a Blade 8b Scraping Spatula 20 Heat Storage Tank 21 Water 22 Ice Crystals

Claims (1)

[Claims] 1. A heat exchanger body having an inlet for water inflow and an outlet for ice crystal outflow, a cooler for cooling an outer wall surface of the heat exchanger body, and a rotor rotating in the heat exchanger body. A heat exchanger for ice crystals, comprising: a scraping blade that scrapes the inner wall surface of the heat exchanger body while flowing water or ice crystals from the inlet to the outlet.