KR102609495B1 - Ice making system using supercooling - Google Patents

Abstract

The supercooled ice slurry ice-making system according to the present invention includes an ice-making water supply unit; A storage unit where ice slurry is accommodated; an ice-making water heating unit that melts ice particles contained in the ice-making water; A filter unit that filters out foreign substances and ice particles; a subcooler that converts it into supercooled ice-making water; a supercooling freezer that provides a cold heat source to the supercooler; A supercooling reliever that generates ice slurry by relieving the supercooling state; Circulation piping section; and an ice-making water circulation pump that supplies the ice-making water to the ice-making water heating unit, wherein the ice-making water heating unit supplies the ice-making water connected to the circulation piping unit between the ice-making water circulation pump and the filter unit to circulate the ice-making water. An ice-making water preheating heat exchanger for heating, an ice-making water storage tank connected to the ice-making water supply unit so that the ice-making water flows in and connected to supply the ice-making water to the storage unit, and the ice-making water in the ice-making water storage tank is supplied via the ice-making water preheating heat exchanger. It is characterized by including an ice-making water heat exchange line portion arranged to perform a heat exchange process while circulating.

Description

Supercooled ice slurry ice making system {Ice making system using supercooling}

The present invention relates to a supercooled ice slurry ice making system. More specifically, the present invention relates to a supercooled ice slurry ice making system, and more specifically, is capable of melting ice grains present in the water fed into the supercooler without using a preheater that requires energy in the ice slurry manufacturing process, and is capable of melting the entire ice slurry. This relates to a supercooled ice slurry ice making system that can improve the stability and ice making efficiency of the ice making process by not only reducing energy costs by shortening time but also improving the efficiency of the supercooling freezer.

In general, seawater ice slurry is manufactured using supercooling and has excellent cooling efficiency, so it is widely used for storage, storage, and distribution of marine products such as fish. Here, supercooling refers to a phenomenon in which the liquid or gas does not crystallize into a solid and is cooled below the freezing point when nuclei are lacking or absent in the process of lowering the temperature of the liquid or gas.

The seawater ice slurry ice-making system using supercooling continuously produces fluid seawater ice slurry through supercooling and can stably provide it as a source of cold and heat for marine products. It first eliminates the supercooling of the supercooled aqueous solution produced by supercooling, thereby relieving the ice slurry of the ice slurry. After converting it into a format, save it and use it.

Figure 1 is a schematic diagram showing a conventional supercooled ice slurry ice-making system, as shown therein, an ice storage unit 15, a seawater supply unit 20, a seawater circulation pump 21, a heater 25, and a filter 30. ), a brine refrigerator (35), a supercooler (45), and a supercooling eliminator (46).

Here, as is well known, the brine refrigerator 35 includes a brine tank 35a, a brine pump 35b, a compressor 35c, a condenser 35d, a receiver 35e, a filter drier 35f, and an expansion valve 35g. ), an evaporator (35h), a gas-liquid separator (35i), etc., and is comprised of a device commonly referred to as a brine refrigerator.

When explaining the ice slurry manufacturing process of the conventional supercooled ice slurry ice-making system described above, fresh water and seawater with a salinity concentration of 2 to 3 wt% are adjusted to have a salinity concentration of approximately 1% to produce salinity control water (hereinafter referred to as ice-making water). After being formed, it is supplied to an ice storage unit such as an ice storage tank, and when the seawater in the storage unit reaches a low level or higher, the seawater circulation pump (21) is operated to transfer seawater to the heater (25), filter (30), supercooler (45), and supercooling. Ice slurry is produced through a process of passing through the resolver 46 and then circulating back to the ice storage unit 15.

To be more specific, at the beginning of operation, the preheating heater does not operate because the temperature of the seawater is room temperature, and seawater with a salinity concentration of 1% begins to freeze when the temperature (T1) falls below -0.5℃, and the seawater is cooled in a supercooler. It is supercooled to a temperature about 2~3℃ lower than the freezing temperature. Here, if there are ice particles in the supercooled seawater, there is a problem that the supercooler is frozen and closed as the supercooling is resolved within the supercooler. Therefore, the preheating heater 25 is used to remove fine ice particles contained in the seawater entering the supercooler 45. It melts and removes ice grains or fine particles in the ice-making water that do not melt even after overheating using a filter.

And, if the temperature of the brine of the brine cooler (35) within the subcooler (45) is too low, the heat exchange surface temperature of the subcooler heat exchanger becomes low, supercooling is eliminated within the subcooler, and freeze closure of the subcooler may occur, so the brine The temperature of the brine supplied from the freezer must be supplied at a constant temperature.

Seawater, which has been supercooled in the supercooler 45 and has a supercooling degree of about 2°C and a salt concentration of 1 wt%, is supplied to the supercooler desolver 46 and then discharged from the outlet of the supercooler desolver as an ice slurry with an ice ratio of about 2%. After that, it is supplied to the storage unit (15).

In the low ice section, the ice floats to the top and the water is separated to the bottom due to the difference in specific gravity between the ice and seawater. Therefore, if the seawater circulation pump continues the circulation process of water in the lower layer, the water in the sea water continuously turns into ice and is stored in the upper part of the low ice section. It piles up. Afterwards, only the water component in seawater turns into ice, and the salt component remains dissolved in the liquid. As ice is formed, the amount of water in the seawater decreases and the salt concentration in the seawater increases. As the ice fraction (IPF) increases within the deicing unit, the salt concentration of unfrozen seawater increases. Depending on the changed salinity concentration, the freezing temperature of seawater also changes. For example, if the ice fraction in 1% raw seawater becomes 30%, the salinity concentration of seawater becomes 1.43% and the freezing temperature at this time becomes -0.8°C. As the ice fraction (IPF) increases, the ice content increases, which worsens the fluidity of seawater ice slurry and makes transportation by pump difficult. Therefore, the ice storage unit concentrates and stores ice up to the ice concentration corresponding to the set ice fraction.

Then, when the ice slurry in the ice storage unit 15 reaches the set ice fraction, the stirrer in the storage tank is activated, the operation of the seawater circulation pump 21 is stopped, and the stirrer is rotated to mix the ice and seawater in the storage tank. It is maintained and supplied to the place of use by the ice slurry supply pump (83).

The conventional supercooled ice slurry ice making system as described above can conveniently produce seawater ice slurry using supercooling, but has the following limitations.

In the conventional supercooled ice slurry de-icing system, the preheating heater 15 does not operate because the temperature of the sea water included in the ice-making water is room temperature at the beginning of operation, but the temperature (T1) of sea water with a salinity concentration of 1% is -0.5°C or lower. When seawater slurry ice is produced by supercooling it to a temperature about 2-3℃ lower than the freezing temperature of seawater in a supercooler, ice and seawater coexist in the ice storage tank, and seawater is cooled using a seawater circulation pump. When transferring from an ice storage tank to a supercooler, fine ice particles exist in the seawater, which can eliminate supercooling within the supercooler and close the supercooler. Therefore, there is a disadvantage in that excessive energy costs are incurred because the preheater must be continuously operated to melt the ice grains present in the seawater transferred from the ice storage tank to the supercooler.

Korean Patent No. 10-2439174 “Seawater ice slurry ice-making system using supercooling” Japanese Patent Publication No. 2017-72369 “Ice storage tank and sherbet ice making system”

The present invention was proposed in light of the above contents, and can melt ice grains present in the water fed into the supercooler without using a preheater that requires energy in the ice slurry manufacturing process, and reduces energy costs by shortening the total ice-making time. The purpose is to provide a supercooled ice slurry ice-making system that can reduce .

Another object of the present invention is to provide a supercooled ice slurry ice making system that improves the stability of the ice making process and the ice making efficiency by not only reducing energy costs but also improving the efficiency of the supercooling refrigeration unit.

In order to achieve the above object, a supercooled ice slurry ice making system according to the present invention includes: an ice water supply unit that generates and supplies ice water having a set standard salinity using seawater and fresh water; an ice storage unit that accommodates the ice-making water and ice slurry produced by the ice-making water; an ice-making water heating unit connected to the ice storage unit and performing an action of melting ice particles contained in the ice-making water; a filter unit that filters out foreign substances and ice particles contained in the ice-making water that has passed through the ice-making water heating unit; a supercooler that receives the ice-making water via the filter unit and converts it into supercooled ice-making water having a set standard supercooling temperature; a supercooled freezer that provides a cooling heat source to the supercooler to form the supercooled ice-making water; a supercooling reliever disposed between the supercooler and the ice storage unit and generating ice slurry by relieving the supercooled state of the supercooled ice water supplied from the supercooler; a circulation piping unit disposed between the ice storage unit, the ice-making water heater unit, the filter unit, the supercooler, and the supercooler desiccant unit; and an ice-making water circulation pump disposed in the circulation piping section between the ice storage unit and the ice-making water heating unit to supply the ice-making water to the ice-making water heating unit, wherein the ice-making water heating unit is configured to circulate the ice-making water. An ice-making water preheating heat exchanger connected to the circulation pipe between the pump and the filter unit to heat the ice-making water passing through, connected to the ice-making water supply unit so that the ice-making water flows in, and connected to supply the ice-making water to the ice storage unit. An ice-making water storage tank, and an ice-making water heat exchange line portion arranged to perform a heat exchange process while the ice-making water in the ice-making water storage tank circulates through the ice-making water preheating heat exchanger.

The ice-making water heat exchange line unit includes an ice-making water supply line for heat exchange, one end of which is connected to the ice-making water storage tank; an ice-making water heat exchange member connected to the other end of the ice-making water supply line for heat exchange and disposed inside the ice-making water preheat heat exchanger; An ice-making water recovery line for heat exchange connected between the ice-making water heat exchange member and the ice-making water storage tank; An ice water supply pump installed in the ice water supply line for heat exchange; an ice storage unit connection line branched from the ice water supply line for heat exchange and connected to the ice storage unit; and an ice-making water supply control valve installed at a branch of the ice storage unit connection line.

The supercooled ice slurry ice-making system according to the present invention includes a first temperature sensing unit installed to detect the temperature of the ice-making water discharged from the ice storage unit; and a second temperature sensing unit installed to detect the temperature of the ice-making water flowing into the supercooler.

Preferably, the ice-making water heat exchange line unit includes: an ice-making water bypass line connected between the ice-making water supply line for heat exchange between the ice-making water supply pump and the ice-making water supply control valve and the ice-making water recovery line for heat exchange; A bypass control valve installed in the ice-making water bypass line; And a first temperature controller that controls the opening and closing of the bypass control valve so that the temperature detected from the detection signal of the second temperature detection unit is higher than the temperature detected from the detection signal of the first temperature detection unit by a set temperature. You can.

The supercooled ice slurry ice making system according to the present invention includes a refrigerant heat acquisition unit formed in a refrigerant line through which high-temperature and high-pressure refrigerant gas moves in the refrigerant cycle of the supercooled refrigeration unit; a heat storage tank that accommodates heat exchange water heated by the refrigerant heat acquisition unit; and a refrigerant heat exchange means configured to heat the ice-making water flowing into the ice-making water storage tank by the heat-exchange water stored in the heat storage tank.

The refrigerant heat exchange means includes a heat exchange water supply line, one end of which is connected to the heat storage tank; a refrigerant heat exchange member having one end connected to the other end of the heat exchange water supply line and disposed inside the ice making water storage tank; a heat exchange water recovery line connected between the other end of the refrigerant heat exchange member and the heat storage tank; and a heat exchange water supply pump installed in the heat exchange water recovery line.

Meanwhile, the supercooled ice slurry ice making system according to the present invention includes a refrigerant heat acquisition unit formed in a refrigerant line through which high-temperature and high-pressure refrigerant gas moves in the refrigerant cycle of the supercooling refrigeration unit, and heat exchange water warmed by the refrigerant heat acquisition unit. a heat storage tank and a refrigerant heat exchange means configured to heat the ice-making water flowing into the ice-making water storage tank by heat exchange water stored in the heat storage tank, wherein the refrigerant heat exchange means includes a heat-exchange water supply line having one end connected to the heat storage tank. , a refrigerant heat exchange member having one end connected to the other end of the heat exchange water supply line and disposed inside the ice-making water storage tank, a heat exchange water recovery line connected between the other end of the refrigerant heat exchange member and the heat storage tank, and installed in the heat exchange water recovery line. a heat exchange water supply pump, a seventh temperature sensor installed to detect the temperature of the ice water moving to the ice water supply line for heat exchange, and when the temperature detected from the detection signal of the seventh temperature sensor falls below the set temperature, the It may include a second temperature controller that drives a heat exchange water supply pump to circulate the heat exchange water.

And the refrigerant heat exchange means includes a heat exchange water supply line, one end of which is connected to the heat storage tank; an external heat exchanger whose one end is connected to the other end of the heat exchange water supply line; A heat exchange water recovery line connected between the other end of the external heat exchanger and the heat storage tank; and a heat exchange water supply pump installed in the heat exchange water recovery line, wherein the ice water recovery line for heat exchange is disposed in the ice water storage tank after passing through the external heat exchanger to warm the flowing ice water for heat exchange. It is characterized by

Meanwhile, the supercooled ice slurry ice making system according to the present invention includes a refrigerant heat acquisition unit formed in a refrigerant line through which high-temperature and high-pressure refrigerant gas moves in the refrigerant cycle of the supercooling refrigeration unit, and heat exchange water warmed by the refrigerant heat acquisition unit. a heat storage tank and a refrigerant heat exchange means configured to heat the ice-making water flowing into the ice-making water storage tank by heat exchange water stored in the heat storage tank, a heat-exchange water supply line having one end connected to the heat storage tank, and the heat-exchange water supply line. an external heat exchanger, one end of which is connected to the other end of the , and a heat exchange water recovery line connected between the other end of the external heat exchanger and the heat storage tank; A heat exchange water supply pump installed in the heat exchange water recovery line; A seventh temperature detection unit installed to detect the temperature of the ice water moving to the ice water supply line for heat exchange, and driving the heat exchange water supply pump when the temperature detected from the detection signal of the seventh temperature detection unit falls below the set temperature. and a second temperature controller that circulates the heat exchange water, wherein the heat exchange ice water recovery line may be disposed in the ice water storage tank after passing through the external heat exchanger to warm the flowing ice water for heat exchange.

The supercooling freezer unit includes a brine tank connected to the supercooler and accommodating cooled brine therein; a brine pump provided between the brine tank and the supercooler to supply brine contained in the brine tank to the supercooler; A compressor that compresses low-temperature and low-pressure gaseous refrigerant into high-temperature and high-pressure gaseous refrigerant; A condenser that is connected to the compressor and condenses the high-temperature and high-pressure gaseous refrigerant discharged from the compressor into a medium-temperature and high-pressure liquid refrigerant by exchanging heat with external air; A receiver connected to the condenser to temporarily store excess medium-temperature and high-pressure liquid refrigerant that has passed through the condenser and transmits it to an expansion valve; A filter dryer that removes impurities and moisture contained in the medium-temperature and high-pressure liquid refrigerant that has passed through the receiver; An expansion valve that reduces the pressure of the medium-temperature and high-pressure liquid refrigerant that has passed through the filter drier and expands it into low-temperature and low-pressure liquid refrigerant; an evaporator connected to the expansion valve, the supercooler, and the brine tank, respectively, and evaporating the low-temperature, low-pressure liquid refrigerant discharged from the expansion valve into a low-temperature, low-pressure gaseous refrigerant by heat-exchanging it with the medium-temperature brine discharged from the supercooler; and a gas-liquid separator provided between the evaporator and the compressor to separate the liquid refrigerant mixed in the low-temperature, low-pressure gaseous refrigerant that has passed through the evaporator to prevent the liquid refrigerant from flowing into the suction side of the compressor, and obtaining heat from the refrigerant. The unit may be formed by being connected to the refrigerant line through which the high-temperature, high-pressure refrigerant gas discharged from the compressor moves.

According to the supercooled ice slurry ice-making system according to the present invention, the amount of preheating (the amount of heat for removing ice grains) required in the ice slurry ice-making process is provided using ice-making water stored in the ice-making water storage tank and is in a high temperature state. This has the effect of reducing production costs by reducing the required power consumption.

And according to the supercooled ice slurry ice making system according to the present invention, the high-temperature and high-pressure refrigerant gas in the refrigerant cycle moving from the compressor to the condenser radiates heat in the heat storage tank through the refrigerant heat acquisition unit, so supercooling in the condenser increases and condensation occurs. As the pressure is reduced, the efficiency of the brine cooler can be improved, thereby improving the stability of the ice-making process and ice-making efficiency.

Meanwhile, according to the supercooled ice slurry ice-making system according to the present invention, the ice-making water stored in the ice-making water storage tank circulates through the ice-making water heat exchange line unit and goes through a pre-cooling process in which it becomes cold in the ice-making water preheating heat exchanger, thereby providing initial cooling during ice slurry ice-making. It has the effect of increasing daily production by shortening the cooling time in the process. In addition, as described above, since the ice water stored in the ice water storage tank is precooled, the cooling time of the ice water when making ice slurry can be shortened, thereby reducing energy costs required for cooling.

1 is a schematic diagram showing a conventional supercooled ice slurry ice making system;
Figure 2 is a configuration diagram showing a supercooled ice slurry ice making system according to the first embodiment of the present invention;
Figure 3a is an enlarged view of one side of Figure 2;
Figure 3b is an enlarged view of the other side of Figure 2;
Figure 4 is a configuration diagram showing a supercooled ice slurry ice-making system according to a second embodiment of the present invention;
Figure 5a is an enlarged view of one side of Figure 4;
Figure 5b is an enlarged view of the other side of Figure 4.

Hereinafter, preferred embodiments of the present invention will be described in detail based on the attached drawings, and like reference numerals will be assigned to the same components.

Meanwhile, in each drawing, detailed descriptions of the configuration and its operations and effects that can be easily understood by a person with ordinary knowledge in the field from general techniques are simplified or omitted. In addition, since the present invention is characterized by a supercooled ice slurry ice-making system, the related parts will be shown and explained, and the description of the remaining parts will be simplified or omitted.

Figure 2 is a configuration diagram showing a supercooled ice slurry ice-making system according to the first embodiment of the present invention, Figure 3a is an enlarged view of one side of Figure 2, and Figure 3b is an enlarged view of the other side of Figure 2. .

2 to 3B, the supercooled ice slurry ice-making system according to the first embodiment of the present invention includes an ice-making water supply unit (1), an ice storage unit (2), an ice-making water heating unit (3), and a filter unit (4). ), supercooler (5), supercooling freezer (6), supercooling desiccant (7), circulation piping unit (81), ice-making water circulation pump (82), ice slurry transfer pump (83). and a control unit (not shown) to control the operation of the above-mentioned main components, and can melt ice particles present in the water fed into the supercooler without using a conventional preheating heater that requires power. It is unique in that it is designed to shorten the ice making time.

The ice-making water supply unit 1 is a component that mixes seawater and fresh water to produce seawater with a set standard salinity used in the production of seawater ice slurry and supplies it to the ice storage unit 2. Hereinafter, seawater with the above-set standard salinity is referred to as 'ice-making water' to facilitate understanding.

The ice-making water supply unit (1) includes an ice-making water production tank (11) into which seawater and fresh water are mixed, and a seawater supply line (12) connected to the ice-making water production tank and through which seawater with a salinity of 2 to 3.5 is normally supplied. ), a fresh water supply line 13 that is connected to the ice-making water generation tank 11 and supplies fresh water without salt, and an ice-making water supply line 14 that supplies the ice-making water to the point of use.

The ice storage unit 2 is a component that accommodates the ice-making water and the ice slurry produced by the ice-making water, and is installed in the ice-making tank 21 for stirring and includes a blade unit for stirring and a stirring motor. A stirrer (22) is provided.

The ice making tank 21 is installed with a low water level sensor (LL) that detects a set low water level, a mid water level sensor (LM) that detects a set middle water level, and a high water level sensor (LH) that detects a set high water level.

The ice-making water heating unit 3 is connected to the ice storage unit 2 and is a component that melts ice particles contained in the ice-making water. It is a circulation pipe between the ice-making water circulation pump 82 and the filter unit 4. An ice-making water preheating heat exchanger (31) connected to the unit (81) to heat the ice-making water passing through, an ice-making water storage tank connected to the ice-making water supply unit (1) to allow ice-making water to flow in, and connected to supply ice-making water to the ice storage unit (2). (32), an ice-making water heat exchange line unit 33 is arranged so that the ice-making water in the ice-making water storage tank 32 circulates through the ice-making water preheating heat exchanger 31 to perform a heat exchange process.

In addition, a first temperature detection unit (T1) and a second temperature detection unit (T2) are installed in the circulation piping unit (81) to measure the temperature of the ice-making water circulated for controlling the operation of the ice-making water heating unit (3).

The first temperature sensing unit (T1) is a temperature sensor installed to detect the temperature of the ice-making water discharged from the ice-making tank 21 of the ice storage unit 2, and is located between the ice-making water supply pump 82 and the ice-making tank 21. It is installed in the circulation piping section (81).

The second temperature sensing unit (T2) is a temperature sensor installed to detect the temperature of the ice-making water flowing into the supercooler (5) and is installed in the circulation piping unit (81) between the filter unit (4) and the supercooler (5). It is done.

The ice-making water heat exchange line unit 33 includes ice-making water supply lines 331, L3 and L4 for heat exchange, one end of which is connected to the ice-making water storage tank 32 so that ice-making water (ice-making water for heat exchange) is supplied for heat exchange. An ice-making water heat exchange member 332 connected to the other end of the solvent ice-making water supply line 331 and disposed inside the ice-making water preheat heat exchanger 31, and an ice-making water heat exchange member 332 and ice-making water so that the ice-making water used for heat exchange is recovered. The ice-making water recovery line 333 for heat exchange connected between the storage tanks 32, the ice-making water supply pump 334 installed in the ice-making water supply line 331 for heat exchange, and the ice-making water supply line 331 branched off to the ice storage unit ( 2), and an ice-making water supply control valve (MV2) installed at a branch of the low-ice connection line (L5) and the low-ice connection line (L5).

And the ice-making water heat exchange line unit 33 further includes an ice-making water bypass line (L6), a bypass control valve (MV1), and a first temperature eliminator (TC1).

The ice-making water bypass line (L6) is connected between the ice-making water supply line 331 for heat exchange between the ice-making water supply pump 334 and the ice-making water supply control valve (MV2) and the ice-making water recovery line 333 for heat exchange. This is a pipe for bypass.

The bypass control valve (MV1) is a control valve installed in the ice-making water bypass line (L6) and is preferably configured as a proportional control valve.

The first temperature controller (TC1) is a component that controls the temperature detected from the detection signal of the second temperature detection unit (T2) to be higher than the temperature detected from the detection signal of the first temperature detection unit (T1) by a set temperature, By controlling the opening and closing of the bypass control valve (MV1), the ice-making water bypass line (L6) is blocked so that the ice-making water does not flow to the ice-making water recovery line 333 for heat exchange, and from L3 to L4 of the ice-making water supply line 331 for heat exchange. Let it flow. At this time, the first temperature controller TC1 can control the opening and closing of the ice-making water supply control valve MV2 to control the flow rate of the ice-making water flowing into the ice storage connection line L5 or close it to block the flow.

The filter unit (4) is a component that filters foreign substances and ice particles contained in the ice-making water via the ice-making water preheating exchanger (31) of the ice-making water heating unit (3), and is a microfilter applied in the field of ice slurry production. It consists of:

The supercooler 5 is a component that performs the function of converting the ice water that flows in through the filter unit 4 into supercooled ice water with a set standard supercooling temperature, and is supplied from the evaporator of the supercooled freezer unit 6, which will be described later. The brine and heat exchange process supercools the supercooled ice-making water to a preset standard supercooling temperature.

The supercooled refrigeration unit 6 is a component that provides a cold heat source to the supercooler 5 for the formation of supercooled ice water, and includes a brine tank 61, a brine pump 62, a compressor 63, a condenser 64, It consists of a device commonly referred to as a brine refrigerator, which is equipped with a water receiver (65), a filter drier (66), an expansion valve (67), an evaporator (68), and a gas-liquid separator (69).

The brine tank 61 is connected to the supercooler 5 through a pipe, and cooled brine is accommodated inside the brine tank 35a.

The brine pump 62 is installed in a pipe installed to pass through the brine tank 61 and the subcooler 5 and supplies the brine contained in the brine tank 61 to the subcooler 5, and the compressor 63 is It is configured to compress a low-temperature and low-pressure gaseous refrigerant into a high-temperature and high-pressure gaseous refrigerant. The condenser 64 is connected to the compressor 63 and exchanges heat with the external air to convert the high-temperature and high-pressure gaseous refrigerant discharged from the compressor into a medium-temperature and high-pressure liquid refrigerant. It performs a condensing action.

The receiver (65) is connected to the condenser (64) and temporarily stores the excess of the medium-temperature and high-pressure liquid refrigerant that has passed through the condenser (64) to supply the medium-temperature and high-pressure liquid refrigerant to the capacity required by the evaporator (68) through the expansion valve (67). It functions as a kind of safety device that transmits

The filter dryer (66) is connected to the receiver (65) and is configured to remove impurities and moisture contained in the medium-temperature and high-pressure liquid refrigerant that has passed through the receiver, and the expansion valve (67) is connected to the filter driver (66) to expand. It performs the function of reducing the pressure of the medium-temperature and high-pressure liquid refrigerant that has passed through the filter dryer 66 through a fine nozzle provided inside the valve 67 and expanding it into a low-temperature and low-pressure liquid refrigerant.

The evaporator 68 is connected to the expansion valve 67, the subcooler 5, and the brine tank 61, respectively, and converts the low-temperature, low-pressure liquid refrigerant discharged from the expansion valve 67 into the medium-temperature and low-pressure liquid refrigerant discharged from the subcooler (5). It exchanges heat with the brine and evaporates it into a low-temperature, low-pressure gas refrigerant. Then, the medium-temperature brine discharged from the supercooler 5 in the evaporator 68 passes through the evaporator and is converted into low-temperature brine by the low-temperature and low-pressure liquid refrigerant inside the evaporator 68, and the low-temperature brine is stored in the brine tank ( 61).

The gas-liquid separator 69 is provided between the evaporator 68 and the compressor 63 and separates the liquid refrigerant mixed in the low-temperature, low-pressure gaseous refrigerant that has passed through the evaporator 68 to prevent the liquid refrigerant from flowing into the suction side of the compressor. performs the function.

The supercooling reliever 7 is disposed between the supercooler 5 and the ice storage unit 2 and functions to generate ice slurry by relieving the supercooled state of the supercooled ice water supplied from the supercooler.

The supercooling reliever 7 can be constructed by applying a known supercooling reliever used in producing seawater ice slurry. For example, the supercooling eliminator 7 includes an accommodating part 71 that accommodates the supercooled ice-making water supplied from the supercooler 5, and an ultrasonic device provided at the bottom of this accommodating part to generate ultrasonic waves having a preset reference frequency and reference power density. A plurality of ultrasonic vibrators (c) are attached between the generator (not shown), the receiver 71, and the ultrasonic generator to transmit the cavitation shock caused by the vibration of ultrasonic waves generated by the ultrasonic generator to the receiver 71. Equipped with

The circulation piping unit 81 is disposed between the ice storage unit 2, the ice water preheating exchanger 31 of the ice water heating unit 3, the filter unit 4, the supercooler 5, and the supercooling eliminator 7. This line is composed of piping of a size appropriate for the set flow rate or flow rate, and is made of a corrosion-resistant material.

The ice-making water circulation pump 82 is disposed in the circulation piping part 81 between the ice-making water storage unit 2 and the ice-making water preheating heat exchanger 31 in the ice-making water heating part to supply ice-making water to the ice-making water preheating exchanger 31. performs a pumping action.

Meanwhile, the supercooled ice slurry ice making system according to the first embodiment of the present invention is formed by being connected in a zigzag structure to the refrigerant line (CL) through which high-temperature and high-pressure refrigerant gas moves in the refrigerant cycle of the supercooling refrigeration unit (6). A refrigerant heat acquisition unit 35, a heat storage tank 36 containing heat exchange water heated by the refrigerant heat acquisition unit 35, and ice-making water flowing into the ice-making water storage tank 32 by the heat exchange water contained in the heat storage tank 36. It is further provided with a refrigerant heat exchange means (37) configured to heat.

The refrigerant heat exchange means 37 includes a heat exchange water supply line 371, one end of which is connected to the heat storage tank 36, and a refrigerant that has one end connected to the other end of the heat exchange water supply line 371 and is disposed inside the ice-making water storage tank 32. Equipped with a heat exchange member 372, a heat exchange water recovery line 373 connected between the other end of the refrigerant heat exchange member 372 and the heat storage tank 36, and a heat exchange water supply pump 374 installed in the heat exchange water recovery line 373. do.

Preferably, the refrigerant heat exchange means 37 is a seventh temperature detection unit (T7) installed to detect the temperature of ice-making water moving to the ice-making water supply line 333 for heat exchange, and the temperature detected from the detection signal of the seventh temperature detection unit. When the temperature falls below the set temperature, it is provided with a second temperature controller (TC2) that operates the heat exchange water supply pump 374 to circulate the heat exchange water.

Meanwhile, T3 to T5, which are not explained in the attached drawings, such as Figures 2 to 3b, indicate a temperature sensing part, 91 and 92 indicate a valve, and 93 a check valve, as is widely known in piping symbols, and the remaining unexplained symbols or letters indicate It can be understood as a notice used in the piping and brine refrigerator fields. In addition, the temperature displayed on the circulation piping unit 81 indicates the temperature of the relevant area to aid understanding of the invention, and other unexplained symbols and letters are understood as symbols or letters used in the field of supercooled ice slurry ice making. It should be.

Hereinafter, the operation of the supercooled ice slurry ice-making system according to the first embodiment of the present invention will be described.

Referring to FIGS. 2 to 3B, the ice-making water supply unit 1 uses an automatic salinity concentration controller (not shown) when sea water or fresh water with a salinity concentration of 2 to 3.5 flows into the ice-making water generating tank 11. The set standard salinity (1 wt% salinity concentration) is made into ice-making water and then supplied to the ice-making water storage tank 32 for storage.

The ice-making water in the ice-making water storage tank 32 is supplied to the ice-making water supply pump 334 with the bypass control valve MV1 closed and the flow path opened to the low-ice connection line L5 by the ice-making water supply control valve MV2. ) flows into the ice-making tank (21) when the pumping action is performed.

When the ice making water supply pump 82 operates, the ice water in the ice making tank 21 is supplied to the ice making water preheating unit 3, the ice making water preheating heat exchanger 31, and the filter unit 4 through the circulation piping unit 81. , flows along the supercooler (5) and supercooler (7).

And, when the ice-making water in the ice-making tank (21) flows into the ice-making water preheating heat exchanger (31) of the ice-making water heating unit (3), the ice-making water in the ice-making water storage tank (32) is used for heat exchange through the ice-making water heat exchange line unit (33). Because it is circulated, the temperature of the ice-making water flowing into the ice-making water preheating heat exchanger 31 increases by about 0.6°C. More specifically, in the conventional ice slurry de-icing system, an electric heater was used to increase the temperature of sea water flowing into the supercooler, but in the present invention, the ice-making water storage tank 32 is separately configured to provide an ice-making water supply unit (1). The seawater to be flowed into the supercooler 5 is heated by the ice-making water (seawater with a 1 wt% salinity concentration) supplied from ), and the temperature of the seawater used in this embodiment is about 22°C.

In addition, the temperature of the ice-making water pumped from the ice-making tank 21 toward the supercooler 5 is about -0.5°C, and the ice-making water (22°C) in the ice-making water storage tank 32 is supplied through the ice-making water heat exchange line unit 33. As the ice-making water circulates through the preheating heat exchanger (31) and performs a heat exchange function, it raises the temperature by about 0.6°C.

At this time, the ice-making water supply control valve (MV2) operates to allow seawater to flow from L3 to L4 of the ice-making water supply line 331 for heat exchange and operates the ice-making water supply pump 334. The temperature at the inlet of the supercooler (5) is measured from the detection signal of the second temperature detection unit (T2), and the temperature of the second temperature detection unit (T2) is approximately 0.6 lower than the temperature measured by the first temperature detection unit (T1). The opening and closing of the bypass control valve (MV1) is controlled under the control of the first temperature eliminator (TC1) so that the temperature rises.

When the temperature of the second temperature sensing unit (T2) is higher than the temperature of the first temperature sensing unit (T1) by more than 0.6°C, the opening degree of the bypass control valve (MV1) is opened under the control of the first temperature eliminator (TC1) to release the ice-making water. Bypass line (L6), part of the ice-making water is bypassed through the ice-making water recovery line (333) for heat exchange, and the flow rate of high-temperature (22°C) ice-making water to L3 is reduced, so that the ice-making water heat exchanger ( As the heating capacity in 332) is reduced, the temperature detected by the second temperature sensing unit (T2) is lowered. Conversely, when the temperature detected by the second temperature sensing unit (T2) falls below the temperature of the first temperature sensing unit (T1) by 0.6°C, the opening degree of the bypass control valve (MV1) is adjusted under the control of the first temperature eliminator (TC1). Close it to increase the flow rate of high temperature (22°C) ice water to L3, thereby increasing the heating capacity in the ice water preheating heat exchanger (31).

Through the above-described process, the temperature of the second temperature sensing unit (T2) is maintained at a temperature that is 0.6°C higher than the temperature of the first temperature sensing unit (T1), and the ice-making water stored in the ice-making water storage tank 32 at an initial temperature of about 22°C is maintained. As it is provided for heat exchange, the temperature decreases during the ice-making process, and when the temperature drops below a certain temperature, the heating ability as ice-making water for heat exchange is lost. Accordingly, a seventh temperature sensor (T7) is installed at the outlet of the ice-making water storage tank 32 to measure the temperature of the ice-making water discharged from the ice-making water storage tank 32, and the second temperature controller TC2 is installed at the outlet of the ice-making water storage tank 32. ) When the temperature of the ice-making water falls below a certain temperature, the heat-exchange water supply pump 374 operates to circulate the heat-exchange water to heat the ice-making water in the ice-making water storage tank 32, thus maintaining the temperature above a certain level.

Here, the heat exchange water supply pump 374 transfers the heat exchange water of about 40°C, warmed by the refrigerant heat acquisition unit 35 and contained in the heat storage tank 36, to the ice making water storage tank 32 by the refrigerant heat exchange member 372. Raise the temperature of the ice-making water whose temperature has dropped.

More specifically, in the circulation process of ice-making water for ice-making, the brine refrigerator applied as the supercooling refrigeration unit (6) converts high-temperature and high-pressure refrigerant gas during the compression process of the compressor (63), and at this time, the compressor discharge gas is about 75 to 120 degrees Celsius. It is moved to the condenser as a superheated gas at ℃ and condensed. The refrigerant liquefied in the condenser 64 is stored in the receiver 65 and sent to the low-pressure evaporator 68 through the expansion valve 67. In the evaporator (68), the liquefied refrigerant is evaporated by receiving heat from the low-temperature and high-temperature brine, and changes into a complete gas state to be recirculated to the compressor (69).

In addition, in the refrigerant cycle of the above-described brine refrigerator, the high-temperature, high-pressure refrigerant gas at the outlet of the compressor (63) flows through the refrigerant heat acquisition unit (35) disposed inside the heat storage tank (36), thereby dissipating a certain amount of heat into the heat storage tank (36). As the heat exchange water is heated, some of it is liquefied and some of it flows into the condenser in a gaseous state and then changes to a liquid state. In this way, because the high-temperature and high-pressure refrigerant gas dissipates heat in the heat storage tank 36 through the refrigerant heat acquisition unit 35, the temperature at the outlet of the condenser 64 is discharged further. As supercooling in the condenser 64 increases and condensation pressure decreases, the enthalpy at the inlet of the evaporator 68 decreases after passing through the expansion valve 67, and the enthalpy difference between the inlet and outlet of the evaporator increases, thereby reducing the amount of refrigerant circulation. . Accordingly, the efficiency of the cooler increases.

Meanwhile, in the ice slurry deicing process as described above, when the ice fraction (IPF) reaches the required level (IPF 30%), the ice making process is stopped, and the ice slurry transfer pump 83 is operated to remove the ice from the ice making tank 21. The slurry is transported to the place of use through the ice slurry transfer pipe (85) and the ice making tank (21) is emptied. At this time, the operation of the ice-making water circulation pump 82 is stopped and the stirring motor of the agitator 22 of the ice-making tank 21 is operated at maximum so that the ice slurry in the ice-making tank 21 can be uniformly mixed.

And, when the water level level of the ice making tank 21 is detected by the low water level sensor LL, all of the ice slurry has been discharged, and the operation of the ice slurry transfer pump 83 is stopped under the control of the control unit based on this detection signal. When the ice-making water supply pump 334 performs a pumping operation with the pass control valve (MV1) closed and the flow path to the ice-making water supply control valve (MV2) opened to the ice-making water connection line (L5), the ice-making water storage tank The ice-making water at (32) flows into the ice-making tank 21 through the ice-making water supply line for heat exchange (L3) and the ice storage connection line (L5). Afterwards, when the water level in the ice making tank 21 is detected by the mid-water level sensor (LM), the inflow of ice water into the ice storage connection line (L5) is blocked and the ice making water circulation pump 82 is operated to de-ice the ice slurry described above. The process can be performed repeatedly.

In addition, the ice-making water flowing into the ice-making tank 21 undergoes a pre-cooling process in which the ice-making water circulates through the ice-making water heat exchange line unit 33 during the previously implemented ice slurry manufacturing process and is cooled by heat exchange in the ice-making water preheating heat exchanger 31. Since the temperature has decreased over time, the ice making process is started by supplying low-temperature ice water to the ice making tank 21. Therefore, when making ice slurry, the cooling time is shortened during the initial cooling process by the supercooling freezer 6, thereby reducing energy costs. can be reduced and daily production can be increased.

Hereinafter, another embodiment according to the present invention will be described, but detailed description of components similar to those shown in the above-described first embodiment will be omitted and description will focus on components having differences. In addition, in other embodiments below, any structure that can be adopted among the components shown in the first embodiment or the components shown in different embodiments may be selectively applied, and detailed descriptions or illustrations in the drawings are omitted.

Figure 4 is a configuration diagram showing a supercooled ice slurry ice-making system according to a second embodiment of the present invention, Figure 5a is an enlarged view of one side of Figure 4, and Figure 4b is an enlarged view of the other side of Figure 4. .

5 to 6B, the supercooled ice slurry ice-making system according to the second embodiment of the present invention includes an ice-making water supply unit 1, an ice storage unit 2, and ice-making water temperature in the same manner as the first embodiment described above. Unit (3), filter unit (4), supercooler (5), supercooling freezer (6), supercooling desiccant (7), circulation piping unit (81); It is equipped with an ice-making water circulation pump (82) and an ice slurry transfer pump (83), and the ice-making water heating unit (3) includes an ice-making water preheating heat exchanger (31), an ice-making water storage tank (32), and an ice-making water heat exchange line unit (33). , a refrigerant heat acquisition unit (35), a heat storage tank (36), a refrigerant heat exchange means (37), a seventh temperature sensing unit (T7), and a second temperature controller (TC2), and the refrigerant heat exchange means (37) is provided with ice-making water. The heat exchange means for exchanging heat with the ice water in the storage tank 32 is installed outside the ice water storage tank 32 rather than inside.

To be more specific, the refrigerant heat exchange means 37 includes a heat exchange water supply line 371, one end of which is connected to the heat storage tank 36, and an external heat exchanger 375, one end of which is connected to the other end of the heat exchange water supply line 371. , a heat exchange water recovery line 373 connected between the other end of the external heat exchanger 375 and the heat storage tank 36, and a heat exchange water supply pump 374 installed in the heat exchange water recovery line 373.

In addition, the ice-making water recovery line 333 for heat exchange is disposed between the ice-making water preheating heat exchanger 31 and the ice-making water storage tank 32, and is arranged to pass through the external heat exchanger 375 to warm the flowing ice-making water for heat exchange. .

As described above, the supercooled ice slurry ice-making system according to the second embodiment of the present invention has the same or similar ice-making process and effect as the above-described first embodiment, so detailed description is omitted, but the ice-making water storage tank 32 Since the heat exchange means that performs heat exchange with the ice water storage tank (32) consists of an external heat exchanger (375) installed outside the ice water storage tank (32), it is easy to install, convenient to manage, and speeds up maintenance work. , it has the advantage of being easy to perform.

Terms such as “include,” “comprise,” or “have,” as used above, unless specifically stated to the contrary, mean that the corresponding component may be present, and do not exclude other components. It should be interpreted that it may further include other components. All terms, including technical or scientific terms, unless otherwise defined, have the same meaning as generally understood by a person of ordinary skill in the technical field to which the present invention pertains. Commonly used terms, such as terms defined in a dictionary, should be interpreted as consistent with the contextual meaning of the related technology, and should not be interpreted in an idealized or overly formal sense unless explicitly defined in the present invention.

The configuration and operation of the supercooled ice slurry ice-making system according to an embodiment of the present invention described above have been described, but this is illustrative and those skilled in the art will understand the above-mentioned information without departing from the technical spirit of the present invention. It will be appreciated that it is possible to substitute and modify portions of an embodiment.

Therefore, the scope of protection of the present invention should be understood to extend to the invention described in the patent claims and equivalents thereof.

1: Ice-making water supply unit 11: Ice-making water generation tank
2: Ice storage unit 21: Ice tank
22: Agitator 3: Ice-making water heating unit
31: Ice-making water preheating heat exchanger 32: Ice-making water storage tank
33: Ice-making water heat exchange line section 4: Filter section
5: Supercooler 6: Supercooling freezer
61: Brine tank 62: Brine pump
63: Compressor 64: Condenser
65: Receiver 66: Filter dryer
67: Expansion valve 68: Evaporator
69: Gas-liquid separator 7: Supercooling reliever
81: Circulation piping unit 82: Ice-making water circulation pump

Claims (9)

In the supercooled ice slurry ice making system,
An ice-making water supply unit that generates and supplies ice-making water having a set standard salinity using seawater and fresh water; an ice storage unit that accommodates the ice-making water and ice slurry produced by the ice-making water; an ice-making water heating unit connected to the ice storage unit and performing an action of melting ice particles contained in the ice-making water; a filter unit that filters out foreign substances and ice particles contained in the ice-making water that has passed through the ice-making water heating unit; a supercooler that receives the ice-making water via the filter unit and converts it into supercooled ice-making water having a set standard supercooling temperature; a supercooled freezer that provides a cooling heat source to the supercooler to form the supercooled ice-making water; a supercooling reliever disposed between the supercooler and the ice storage unit and generating ice slurry by relieving the supercooled state of the supercooled ice water supplied from the supercooler; a circulation piping unit disposed between the ice storage unit, the ice-making water heater unit, the filter unit, the supercooler, and the supercooler desiccant unit; an ice-making water circulation pump disposed in the circulation piping section between the ice storage unit and the ice-making water heating unit to supply the ice-making water to the ice-making water heating unit; a first temperature sensing unit installed to detect the temperature of the ice-making water discharged from the ice storage unit; and a second temperature sensing unit installed to detect the temperature of the ice-making water flowing into the supercooler, wherein the ice-making water temperature unit is connected to the circulation pipe between the ice-making water circulation pump and the filter unit. An ice-making water preheating heat exchanger that warms the ice-making water passing through, an ice-making water storage tank connected to the ice-making water supply unit so that the ice-making water flows in and connected to supply the ice-making water to the storage unit, and the ice-making water of the ice-making water storage tank is supplied to the ice-making water storage tank. It includes an ice water heat exchange line unit arranged to perform a heat exchange process while circulating through an ice water preheat exchanger,
The ice-making water heat exchange line unit includes an ice-making water supply line for heat exchange, one end of which is connected to the ice-making water storage tank; an ice-making water heat exchange member connected to the other end of the ice-making water supply line for heat exchange and disposed inside the ice-making water preheat heat exchanger; An ice-making water recovery line for heat exchange connected between the ice-making water heat exchange member and the ice-making water storage tank; An ice water supply pump installed in the ice water supply line for heat exchange; an ice storage unit connection line branched from the ice water supply line for heat exchange and connected to the ice storage unit; And an ice-making water supply control valve installed at a branch of the low-ice connection line,
The ice-making water heat exchange line unit includes an ice-making water bypass line connected between the ice-making water supply line for heat exchange and the ice-making water recovery line for heat exchange between the ice-making water supply pump and the ice-making water supply control valve; A bypass control valve installed in the ice-making water bypass line; And a first temperature controller that controls the opening and closing of the bypass control valve so that the temperature detected from the detection signal of the second temperature detection unit is higher than the temperature detected from the detection signal of the first temperature detection unit by a set temperature. A supercooled ice slurry ice making system, characterized in that.
delete delete According to paragraph 1,
A refrigerant heat acquisition unit formed in a refrigerant line through which high-temperature, high-pressure refrigerant gas moves in the refrigerant cycle of the supercooling refrigeration unit;
a heat storage tank that accommodates heat exchange water heated by the refrigerant heat acquisition unit; and
A supercooled ice slurry ice-making system comprising a refrigerant heat exchange means configured to heat the ice-making water flowing into the ice-making water storage tank by the heat-exchanged water contained in the heat storage tank.
According to clause 4,
The refrigerant heat exchange means,
A heat exchange water supply line, one end of which is connected to the heat storage tank;
a refrigerant heat exchange member having one end connected to the other end of the heat exchange water supply line and disposed inside the ice making water storage tank;
a heat exchange water recovery line connected between the other end of the refrigerant heat exchange member and the heat storage tank; and
A supercooled ice slurry ice making system comprising a heat exchange water supply pump installed in the heat exchange water recovery line.
According to paragraph 1,
The refrigerant heat acquisition unit formed in the refrigerant line through which the high-temperature and high-pressure refrigerant gas moves in the refrigerant cycle of the supercooling refrigeration unit, the heat storage tank in which the heat exchange water warmed by the refrigerant heat acquisition unit is received, and the heat exchange water contained in the heat storage tank. It includes a refrigerant heat exchange means configured to heat the ice-making water flowing into the ice-water storage tank,
The refrigerant heat exchange means includes a heat exchange water supply line with one end connected to the heat storage tank, a refrigerant heat exchange member with one end connected to the other end of the heat exchange water supply line and disposed inside the ice-making water storage tank, and the other end of the refrigerant heat exchange member. A heat exchange water recovery line connected between the heat storage tanks, a heat exchange water supply pump installed in the heat exchange water recovery line, a seventh temperature detection unit installed to detect the temperature of the ice water moving to the heat exchange ice water supply line, and the 7. A supercooled ice slurry ice making system comprising: a second temperature controller that operates the heat exchange water supply pump to circulate the heat exchange water when the temperature detected from the detection signal of the temperature sensor falls below the set temperature.
According to clause 4,
The refrigerant heat exchange means,
A heat exchange water supply line, one end of which is connected to the heat storage tank;
an external heat exchanger whose one end is connected to the other end of the heat exchange water supply line;
A heat exchange water recovery line connected between the other end of the external heat exchanger and the heat storage tank; And a heat exchange water supply pump installed in the heat exchange water recovery line,
The supercooled ice slurry ice making system, wherein the heat exchange ice water recovery line passes through the external heat exchanger to warm the flowing ice water for heat exchange and then is disposed in the ice water storage tank.
According to paragraph 1,
The refrigerant heat acquisition unit formed in the refrigerant line through which the high-temperature and high-pressure refrigerant gas moves in the refrigerant cycle of the supercooling refrigeration unit, the heat storage tank in which the heat exchange water warmed by the refrigerant heat acquisition unit is received, and the heat exchange water contained in the heat storage tank. It includes a refrigerant heat exchange means configured to heat the ice-making water flowing into the ice-water storage tank,
A heat exchange water supply line with one end connected to the heat storage tank, an external heat exchanger with one end connected to the other end of the heat exchange water supply line, and a heat exchange water recovery line connected between the other end of the external heat exchanger and the heat storage tank; A heat exchange water supply pump installed in the heat exchange water recovery line; A seventh temperature detection unit installed to detect the temperature of the ice water moving to the ice water supply line for heat exchange, and driving the heat exchange water supply pump when the temperature detected from the detection signal of the seventh temperature detection unit falls below the set temperature. and a second temperature controller that circulates the heat exchange water, wherein the ice water recovery line for heat exchange is disposed in the ice water storage tank after passing through the external heat exchanger to warm the flowing ice water for heat exchange. Supercooled ice slurry ice making system.
According to claim 6 or 8,
The supercooling freezer unit,
A brine tank connected to the supercooler and containing cooled brine therein;
a brine pump provided between the brine tank and the supercooler to supply brine contained in the brine tank to the supercooler;
A compressor that compresses low-temperature and low-pressure gaseous refrigerant into high-temperature and high-pressure gaseous refrigerant;
A condenser that is connected to the compressor and condenses the high-temperature and high-pressure gaseous refrigerant discharged from the compressor into a medium-temperature and high-pressure liquid refrigerant by exchanging heat with external air;
A receiver connected to the condenser to temporarily store excess medium-temperature and high-pressure liquid refrigerant that has passed through the condenser and transmits it to an expansion valve;
A filter dryer that removes impurities and moisture contained in the medium-temperature and high-pressure liquid refrigerant that has passed through the receiver;
An expansion valve that reduces the pressure of the medium-temperature and high-pressure liquid refrigerant that has passed through the filter drier and expands it into low-temperature and low-pressure liquid refrigerant;
an evaporator connected to the expansion valve, the supercooler, and the brine tank, respectively, and evaporating the low-temperature, low-pressure liquid refrigerant discharged from the expansion valve into a low-temperature, low-pressure gaseous refrigerant by heat-exchanging it with the medium-temperature brine discharged from the supercooler; and
A gas-liquid separator is provided between the evaporator and the compressor to separate the liquid refrigerant mixed in the low-temperature, low-pressure gaseous refrigerant that has passed through the evaporator to prevent the liquid refrigerant from flowing into the suction side of the compressor,
A supercooled ice slurry ice making system, characterized in that the refrigerant heat acquisition unit is connected to the refrigerant line through which the high-temperature, high-pressure refrigerant gas discharged from the compressor moves.

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