JP2001153406A - Cooling device for ice making and method of operating the device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cooling device for ice making and a method of operating the device to simplify maintenance, excellently separate water from ice, and improve ice making capacity. SOLUTION: A cooler through which water or low density brine passes and which generates ice water forms an evaporator 5. The evaporator 5, a condenser 6, and a compressor 7 are interconnected to form a refrigerating cycle 1 and a heat storage tank 3 to store ice water is provided. The cooler 5 and the heat storage tank 3 are interconnected through ice water flow passages 4 and 4' having a pump and effecting circulation. In a so formed cooling device for ice making, an ice separator 9 is situated in the ice water flow passage in the ice water flow passage. A flow passage through which water or the low density brine separated by the ice separator 9 is fed to the cooler 5 and a flow passage to return separated ice in the heat storage tank 3 are provided. The ice separator 9 is provided with a rotary filter cylinder 10. A washing brush 11 is attached to the internal part of the cylinder and an ice-removing device 12 to the external part thereof. Further, the ice separator is not operated when the temperature of a flow passage for ice water exceeds an ice point.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooling device for ice making, and more particularly, to a method for cooling ice water supplied from a heat storage tank to a cooler.
The present invention relates to an ice making cooling device that generates ice water in a slurry state by separating ice by an ice separator and supplying separated water or low-concentration brine, and an operation method thereof.

[0002]

2. Description of the Related Art A conventional method will be described with reference to FIG.
FIG. 2 is a flow configuration diagram of the cooling device for ice making, wherein 1 is a refrigeration cycle, 2 is a cooler ice water transfer pump, 3 is an ice heat storage tank,
4 is an ice water flow path, 5 is an evaporator (cooler), 6 is a compressor, 7
Indicates a condenser. As shown in FIG. 2, the water or low-concentration brine stored in the ice heat storage tank 3 is transferred to the cooler 5 which is the evaporator of the refrigeration cycle 1 by the cooler ice water transfer pump 2, and is again stored in the ice heat storage tank 3. Will be returned. During the ice making operation, when the temperature of the water or the low-concentration brine stored in the ice heat storage tank 3 and transported to the cooler 5 decreases (for example, 0 ° C. or lower), a part of the water or the low-concentration brine becomes ice and the fluid becomes It becomes ice water. As described above, the cooling device for ice making is a system in which water or low-concentration brine is generated by generating ice-water in a slurry state and heat is stored therein. The ability was reduced. Therefore, there is a problem that the evaporation temperature, the cooling capacity, and the COP are reduced, and further, the tube in the cooler 5 is closed to lower the heat transfer and freeze.

[0003] In order to solve the above problem, a method shown in FIG. 3 is known as a method for removing ice. FIG. 3 is a flow configuration diagram of the cooling device for ice making, and 1 to 7 are the same as those in FIG. 2
5 is a strainer, 26 is a scraper, 27 is a scraper drive motor, and 28 is a scraper drive shaft. As shown in FIG. 3, a strainer 25 is attached inside the ice thermal storage tank 3,
The suction pipe of the cooler ice water transfer pump 2 is connected, and a scraper 26 is attached outside the strainer 25. A motor 27 for driving the scraper is provided via a drive shaft 28 for the scraper.
In this method, the scraper 26 is rotated to remove ice and scrape off the ice attached to the outside of the strainer. In this method, since the strainer 25 is inside the ice heat storage tank 3, it is difficult to empty the inside of the ice heat storage tank 3 at the time of maintenance, and the drive shaft is long and the production cost is expensive. It took time to work. In addition, since the separated ice is located around the strainer, there is a problem in that the separated ice immediately adheres after the separation.

[0004]

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems of the prior art, is easy to maintain, satisfactorily separates water and ice, and has an improved ice-making ability, and a method of operating the same. The task is to provide

[0005]

In order to solve the above-mentioned problems, according to the present invention, a cooler for passing water or low-concentration brine to produce ice water in the form of slurry is used as an evaporator, and the evaporator, the condenser and the compressor are combined. A refrigerating cycle by connecting the cooling device and a heat storage tank for storing the produced ice water, and a cooling device for producing the ice water and a heat storage tank connected by a circulating ice water flow path having a pump for ice making cooling. In the apparatus, an ice separator is installed in the ice water flow path, a flow path for supplying water or low-concentration brine from which the ice is separated by the ice separator to the cooler, and ice separated in the heat storage tank. A flow path for returning to a high density portion is provided. In the ice making cooling device, the ice separator is provided with a rotary filtration cylinder in the flow path of ice water,
A cleaning brush may be provided inside the cylinder, or a cleaning brush may be provided inside the cylinder and an ice removing device may be provided outside. Further, in the present invention, in the method for operating the ice making cooling device, a temperature detector for detecting a temperature of ice water circulating through the cooler and the heat storage tank is provided in the ice water flow path, and the ice temperature is detected based on the detected temperature. It was decided whether to activate the separator.

[0006]

DETAILED DESCRIPTION OF THE INVENTION In the present invention, an evaporator is used as a cooler through which water or low-concentration brine passes to produce slurry ice water, and the evaporator, a condenser and a compressor are connected to form a refrigeration cycle. A cooling tank for storing the generated ice water, and a cooling device for ice making connected by an ice water flow path having a pump for circulating the cooler for generating the ice water and the heat storage tank, wherein the ice separator is provided in the ice water flow path. And water to which ice was separated or low-concentration brine was supplied to the cooler.

Next, the present invention will be described in detail with reference to the drawings. FIG. 1 is a flow configuration diagram of the ice making cooling device of the present invention. In FIG. 1, 1 is a refrigeration cycle, 2 is a cooler ice water transfer pump, 3 is an ice heat storage tank, 4, 4 ′ is an ice water flow path,
5 is an evaporator (cooler), 6 is a compressor, 7 is a condenser, 9 is an ice separator, 10 is a rotary filtration cylinder, 11 is a spiral inner surface cleaning brush, 12 is an outer surface cleaning cutter, and 13 is a filtration cylinder driving motor. , 14 is a filter cylindrical drive shaft, 15 is an ice pool, 16 is an ice return pipe, 17 is an ice return valve, 18 is an ice separator control device, 19 is an ice water temperature detecting end, 20 is a backwash pipe, and 21 is a reverse pipe. The washing pump 22 is an ice separator differential pressure detector.

As shown in FIG. 1, the water or low-concentration brine stored in the ice heat storage tank 3 is conveyed to a cooler 5 which is an evaporator of the refrigeration cycle 1 by a cooler ice water transfer pump 2 and is provided with an ice water flow path. It is returned to the ice heat storage tank 3 again via 4 '. During the ice making operation, the temperature of the water or the low-concentration brine stored in the ice heat storage tank 3 and transported to the cooler 5 decreases (for example, 0%).
℃ or less), part of the water or low-concentration brine becomes ice and the fluid becomes ice water. When a normal strainer is installed to remove ice, ice adheres to the stitches and becomes clogged, making continuous operation impossible, and there is no means for returning the accumulated ice. In the present invention, ice in ice water is separated and returned to the ice heat storage tank 3, and water or low-concentration brine is transported to the cooler 5.

The structure of the ice separator is such that the rotary filtration cylinder 10 is rotated between the spiral inner surface cleaning brush 11 and the outer surface cleaning cutter 12 to flow ice water and automatically prevent ice from being clogged. Is what you do. By the above operation, water or low-concentration brine from which ice has been separated flows into the cooler 5, and the separated ice passes through the ice reservoir 15, and is returned to the ice heat storage tank 3 via the ice return pipe 16 and the ice return valve 17. It is.

When the temperature of the water or the low-concentration brine is higher than the freezing point, it is not necessary to operate the ice separator 9 in particular. , The filtration cylinder drive motor 13 is stopped, and the ice return valve 17 is closed. In rare cases, ice may adhere to the outside of the rotary filtration cylinder 10. In that case,
Since the differential pressure at the ice water inlet / outlet of the ice separator 9 increases, the differential pressure is detected by the ice separator differential pressure detector 22 and the backwash pump 21
Is operated to remove ice outside the rotary filtration cylinder 10. Since the present apparatus is outside the ice heat storage tank 3, it is not necessary to drain the ice water from the ice heat storage tank 3 at the time of maintenance, so that the apparatus can be easily performed.

[0011]

According to the present invention, during the ice making operation, even if the temperature of the water or the low-concentration brine stored in the ice heat storage tank 3 and conveyed to the cooler 5 is lowered (for example, lower than O ° C.), cooling is performed. It is possible to transport water or low-concentration brine from which ice has been removed, and the removed ice is returned to the ice storage tank, increasing the ice making capacity, shortening the rise time, and further cooling. There is an effect that there is no blockage of the vessel tube and freezing can be prevented.

[Brief description of the drawings]

FIG. 1 is a flow configuration diagram showing an example of an ice making cooling device of the present invention.

FIG. 2 is a flow configuration diagram of a conventional ice making cooling device.

FIG. 3 is a flow configuration diagram of a conventional cooling device for ice making.

[Explanation of symbols]

1: refrigeration cycle, 2: cooler ice water transfer pump, 3: ice heat storage tank, 4, 4 ': ice water flow path, 5: evaporator (cooler),
6: compressor, 7: condenser, 9: ice separator, 10: rotary filtration cylinder, 11: spiral inner surface cleaning brush, 12: outer surface cleaning cutter, 13: filtration cylinder drive motor, 14: filtration cylinder drive shaft, 15 : Ice pool, 16: ice return pipe, 17: ice return valve, 18: ice separator control device, 19: ice water temperature detection end, 20: backwash pipe, 21: backwash pump, 22: ice separator Differential pressure detector

 ──────────────────────────────────────────────────続 き Continuing the front page (72) Takashi Okada, Inventor 11-1 Haneda Asahi-cho, Ota-ku, Tokyo Inside Ebara Works Co., Ltd. (72) Nozomi Kusumoto 1-2-27 Jomi, Chuo-ku, Osaka-shi, Osaka No. 22nd floor of Crystal Tower Sunwell Japan Co., Ltd.

Claims (3)

[Claims] An evaporator is a cooler that generates slurry ice water through which water or low-concentration brine passes, and a refrigerating cycle is formed by connecting the evaporator, a condenser and a compressor. In a cooling device for ice making in which a heat storage tank for storing ice water and a cooler for generating the ice water and a heat storage tank are connected by a circulating ice water flow path having a pump, an ice separator is installed in the ice water flow path. A flow path for supplying water or low-concentration brine from which ice has been separated by an ice separator to the cooler, and a flow path for returning the separated ice to a high-density ice portion in the heat storage tank are provided. A cooling device for ice making. 2. The ice separator according to claim 1, wherein a rotary filtration cylinder is provided in a flow path of the ice water, and a washing brush is provided inside the cylinder, or a washing brush is provided inside the cylinder and an ice removing device is provided outside. The cooling device for ice making according to claim 1, wherein: 3. The method for operating an ice making cooling device according to claim 1, wherein a temperature detector for detecting a temperature of ice water circulating in the cooler and the heat storage tank is provided in the ice water flow path. A method for operating an ice making cooling device, comprising determining whether to operate the ice separator according to a temperature.