JPH05106949A - Frozen grain production equipment - Google Patents

Abstract

(57) [Summary] [Purpose] Refrigerant such as liquefied nitrogen is not required for cooling the frozen fluid. [Configuration] The ice making chamber 1 and the refrigerator 6 are connected by a duct 10,
The fan 8 circulates and cools the air in the ice making chamber 1. Frozen fluid 2a sprayed from the sprayer 2
Heat-exchanges the air in the low temperature ice making chamber 1 to become frozen particles. [Effect] Since a refrigerant such as liquefied nitrogen is no longer needed, running costs can be reduced, and there is no need for auxiliary equipment for storing the refrigerant.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for producing fine frozen particles such as ice particles used for various surface treatments as abrasives and abrasives.

[0002]

2. Description of the Related Art FIG. 2 shows, for example, JP-A-62-196574.
FIG. 1 is a structural diagram of a conventional apparatus for producing frozen fine particles, which is disclosed in Japanese Patent Laid-Open No. 62-196575 and the like. In the figure, 1 is an ice making chamber, 2 is a sprayer arranged downward in the upper part of the ice making chamber 1, 3 is a collecting device such as a conveyor, 4 is a nozzle,
Reference numeral 5 is a refrigerant such as liquefied nitrogen stored in the ice making chamber 1.

Next, the operation will be described. Frozen fluid 2a such as water sprayed downward from the upper sprayer 2
Is cooled by the refrigerant 5 such as liquefied nitrogen stored in the ice making chamber 1 and the vaporized gas to become fine frozen particles, which sink to the bottom of the ice making chamber 1. The frozen particles thus formed are collected by the collecting device 3, sprayed from the nozzle 4 by a pressure feeding device (not shown), and used for surface treatment of, for example, a semiconductor.

[0004]

Since the conventional apparatus for producing frozen frozen particles is cooled by using the refrigerant such as liquefied nitrogen as described above, the running cost due to the consumption of the refrigerant is high and a large amount of the refrigerant is stored. Equipment was required.

The present invention has been made to solve the above problems, and an object thereof is to obtain an apparatus for producing fine frozen particles which does not require a refrigerant such as liquefied nitrogen for cooling the fluid to be frozen. Is.

[0006]

In the apparatus for producing fine frozen particles according to the present invention, the gas in the ice making chamber is circulated to a refrigerator so that the ice making chamber can be cooled to an extremely low temperature of -130 ° C or less. Is.

[0007]

The refrigerator according to the present invention cools the inside of the ice making chamber to an extremely low temperature by circulating the gas, and therefore does not require a refrigerant which has been used conventionally.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. In FIG. 1, 6 is a Stirling refrigerator, 6a is this cooling portion, 7 is a drive motor for the Stirling refrigerator 6, 8 is a cooling air circulation fan, 9 is a drive motor for the same.
Reference numeral 0 is a circulation duct for cold air. Since the other configurations are similar to those of the conventional one, the same reference numerals are given and the description thereof will be omitted.

Next, the operation of the above device will be described. The cooling part 6a of the Stirling refrigerator is cooled to a low temperature. A gas such as air in the ice making chamber 1 is circulated in the duct 10 by the fan 8 and cooled in the cooling portion 6a.
The frozen fluid 2a sprayed from the sprayer 2 exchanges heat with the air in the ice making chamber 1 having a low temperature, freezes, and accumulates in the lower portion.

In the above embodiment, a Stirling refrigerator is used as the refrigerator, but the same effect can be obtained even if a mechanical refrigerator of another type is used.

[0011]

As described above, according to the present invention, since the air in the ice making chamber is cooled by the refrigerator and the refrigerant such as liquefied nitrogen is not used, the running cost is reduced and the equipment for storing the refrigerant is also required. There is an excellent effect such as not doing.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an apparatus for producing frozen fine particles according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a conventional apparatus for producing frozen particles.

[Explanation of symbols]

 1 Ice Maker 2 Sprayer 3 Recovery Device 4 Nozzle 6 Stirling Refrigerator 7 Motor 8 Fan 9 Motor 10 Duct

Claims (2)

[Claims] 1. An ice making chamber for producing fine frozen particles, a sprayer disposed in the ice making chamber for spraying a fluid to be frozen, and a recovery device for collecting the frozen particles from the ice making chamber, wherein the ice making chamber is provided. A device for producing finely-frozen particles, characterized in that a gas such as the air is communicated with a refrigerator and is circulated through the refrigerator. 2. The apparatus for producing fine frozen particles according to claim 1, wherein a Stirling refrigerator is used as the refrigerator.