Supercooling water ice maker based on instantaneous cavitation crystal promotion technology and operation method thereof

Abstract

The application discloses supercooled water ice maker based on instantaneous cavitation crystallization technology, relates to the technical field of supercooled water ice making, and comprises a supercooled water preparation unit, an instantaneous cavitation crystallization unit, a filter and an ice slurry storage unit, the supercooled water preparation unit comprises a lower fixed plate and an upper fixed plate, cold air inlets, cold air outlets, liquid inlets and liquid outlets are arranged at the four corners of the lower fixed plate and the upper fixed plate respectively; the gas in the fixed block is stirred by the first fan blade, so that the temperature of the cold air in the fixed block is relatively uniform, local high air in the fixed block is avoided, the ice-water mixture of the liquid outlet can normally flow from the inside of the conveying pipeline, the ice block condensation of the liquid outlet can be broken by the second fan blade when being relatively large, blockage of the liquid outlet and the conveying pipeline is avoided, the ice-water mixture is ensured to flow from the conveying pipe, and the fixed pipe and the conveying pipeline are in the ice-water mixture state.

Description

Technical Field

[0001] This invention relates to the field of subcooled water ice-making technology, specifically to a subcooled water ice maker and its operating method based on instantaneous cavitation crystallization technology. Background Technology

[0002] Subcooled water ice making is a highly efficient ice-making technology based on the supercooling phenomenon of water. Subcooled water is metastable water that remains liquid even when its temperature is below 0°C. Its formation depends on conditions such as high purity, absence of effective crystal nuclei, and environmental stability. Thermodynamically, it is in a metastable state and requires external triggering to break through the nucleation barrier and complete the phase change. The core of subcooled water ice making technology is to first stably produce subcooled water through a plate heat exchanger, and then induce a phase change to generate ice slurry through crystallization. It is widely used in ice storage air conditioning, food preservation, industrial cooling and other fields. In the existing technology, the subcooled water ice maker based on instantaneous cavitation crystallization technology has certain drawbacks. The cooling air is located inside the plate heat exchanger and cools the liquid temperature inside the fixed tube, which can easily cause local temperature differences inside the fixed block. This affects the effect of ice crystal condensation inside the fixed tube. The temperature inside the fixed block is too low, causing the liquid at the liquid outlet to condense into large lumps, which can easily block the liquid inside the liquid outlet and also affect the flow of the ice-water mixture in the liquid outlet. Summary of the Invention

[0003] The purpose of this invention is to provide a subcooled water ice maker and its operation method based on instantaneous cavitation crystallization technology, so as to solve the problems mentioned in the background art.

[0004] The objective of this invention can be achieved through the following technical solutions: A subcooled water ice maker based on instantaneous cavitation crystallization technology includes a subcooled water preparation unit, an instantaneous cavitation crystallization unit, a filter, and an ice slurry storage unit. The subcooled water preparation unit includes a lower fixed plate and an upper fixed plate. A cold air inlet, a cold air outlet, a liquid inlet, and a liquid outlet are respectively located at the four corners of the lower and upper fixed plates. A freezing assembly is disposed between the lower and upper fixed plates. The freezing assembly includes several sets of fixing blocks arranged in rows between the lower and upper fixed plates. Two corners of each fixing block have openings for gas flow. The first and second venting grooves are provided. A first drive motor is installed on the surface of the upper fixed plate. A second fixed shaft is installed at the output end of the first drive motor. A first fan blade is sleeved in the middle of the second fixed shaft and inside each fixed block. The first fan blade is used to stir the airflow in the fixed block. A staggered fixed tube is installed inside each fixed block. The liquid inside the fixed tube is in contact with the cooling airflow inside the fixed block. The liquid in the fixed tube is in contact with the gas in the fixed block for heat exchange. The two ends of the fixed tube are connected to the liquid inlet and the liquid outlet, respectively.

[0005] As a preferred embodiment of the present invention, the liquid outlet, instantaneous cavitation crystallization unit, filter and ice slurry storage unit of the supercooled water preparation unit are connected in sequence. Each of the first venting grooves is located at the contact point between the cold air inlet and each of the fixed blocks. Each of the second venting grooves is located at the contact point between the cold air outlet and each of the fixed blocks. A mixing chamber is opened inside the fixed block. A sealing gasket is installed at the contact point of each fixed block and at the edge of the mixing chamber. The sealing gasket is used to prevent gas from leaking from the fixed block.

[0006] As a preferred embodiment of the present invention, the second fixing shaft passes through the center of each fixing block, and a rubber ring is fitted on the cylindrical surface of the second fixing shaft at the intersection of the second fixing shaft and each fixing block. The rubber ring is used to prevent gas leakage inside each fixing block.

[0007] As a preferred embodiment of the present invention, the cooling gas from the cold air inlet enters the interior of each fixed block and is discharged from the cold air outlet, and the liquid from the liquid inlet enters the interior of each fixed block and is discharged from the liquid outlet. The liquid flow rate is less than the cooling gas flow rate, ensuring that the substance discharged from the liquid outlet is an ice-water mixture.

[0008] As a preferred embodiment of the present invention, the fixed tube is arranged in a mesh shape, and the horizontal position of the fixed tube is offset from the horizontal position of the first fan blade. Blocks are provided on both sides of the fixed tube, and the blocks on both sides are respectively locked onto the two side walls of the fixed block.

[0009] As a preferred embodiment of the present invention, both sides of the fixed tube are connected to two plugs by nuts, and the interior of the fixed tube is connected to the liquid inlet and the liquid outlet by the plugs on both sides. The inner diameter of the fixed tube is greater than or equal to 1 / 10 of the diameter of the liquid outlet.

[0010] As a preferred embodiment of the present invention, an ice-breaking assembly is provided inside the liquid outlet. The ice-breaking assembly includes a second motor, which is mounted on the upper surface of the upper fixed plate. A first fixed shaft is provided at the output end of the second motor. The first fixed shaft is located inside the liquid outlet. A plurality of second fan blades are sleeved on the outside of the first fixed shaft. The second fan blades rotate synchronously with the first fixed shaft. The first fixed shaft is used to prevent the ice-water mixture inside the liquid outlet from condensing and thus preventing it from moving along the inside of the liquid outlet.

[0011] The operating method of the subcooled water ice maker based on instantaneous cavitation crystallization technology, applied to the aforementioned subcooled water ice maker, includes the following steps: S1. Equipment preparation before operation: Check each component unit in the subcooled water preparation unit, instantaneous cavitation crystallization unit, ice slurry storage unit and filter to ensure that the connections between each piece of equipment are secure. S2. Raw material preparation and parameter setting: Pure water is injected into the interior of each fixed block through the liquid inlet. The mixture of ice and water is discharged through the liquid outlet after being processed by the refrigeration component. The temperature of the cold air inlet and the temperature of the liquid inlet are set, as well as the flow rate of the liquid and the flow rate of the cooling gas are set. S3, Subcooled water preparation stage: The subcooled water preparation unit is started to exchange heat between the purified water and the cooling gas through the plate heat exchanger, and gradually cools down to the preset subcooled water target temperature. S4. Pretreatment of cavitation crystallization unit: Compressed air is introduced into the high-pressure gas tank of the instantaneous cavitation crystallization unit, and the air pressure is adjusted by the control system to reach the preset initial pressure. S5. Subcooled water delivery and cavitation triggering: After the subcooled water temperature stabilizes in the target range, the delivery pump is started to deliver the subcooled water to the interior of the instantaneous cavitation crystallization unit. The air is depressurized instantaneously according to the preset depressurization rate, generating a cavitation effect and triggering rapid nucleation of the subcooled water. S6. Crystal nucleus and undercooling monitoring: Detect the number and size distribution of crystal nuclei during cavitation-induced crystallization. S7. Processing the accumulation of crystal nuclei: When the accumulation of crystal nuclei is large, the ice-breaking component is activated to break up the accumulated crystal nuclei, thereby facilitating the transport of crystal nuclei along the conveying pipe. S8. Ice Slurry Generation and Storage: After cavitation-induced crystallization, supercooled water undergoes phase change to generate ice slurry. After the ice slurry passes through a filter to remove excess impurities and large agglomerated ice crystals, it enters the ice slurry storage unit for temporary storage. S9. Shutdown procedure: Stop cavitation triggering and subcooled water preparation, stop supplying compressed air to the cavitation chamber, stop subcooled water generation and delivery, then drain all the ice slurry in the ice slurry storage unit, turn off the main power supply of the ice maker, and release the remaining pressure in the high-pressure gas tank.

[0012] In a preferred embodiment of the present invention, the initial temperature of the purified water in step S3 is 25°C, and the target temperature range of the subcooled water is -3.0°C to -0.5°C. The subcooled water temperature is monitored in real time using a platinum resistance thermometer to ensure that the temperature remains stable within the set range. In step S4, the initial air pressure is 1.8 MPa. In step S5, the subcooled water is delivered to the cavitation cavity of the instantaneous cavitation crystallization unit at a flow rate of 1 m / s, and the pressure inside the cavitation cavity drops to 0.1 MPa. In step S6, the number of crystal nuclei is stabilized at 1.2 × 10⁻⁶. 5 per mL.

[0013] In a preferred embodiment of the present invention, in step S3, pure water enters from the liquid inlet and exits from the liquid outlet, while cooling gas enters from the cold air inlet and exits from the cold air outlet. The first fan blade is used to accelerate the heat exchange between the cooling gas and the pure water. In step S8, the number of crystal nuclei is greater than 2.0 × 10⁻⁶. 5When the number of crystals is 1 / mL, the second blade breaks the crystal nucleus.

[0014] Compared with the prior art, the beneficial effects of the present invention are: It is equipped with a refrigeration component, which stirs the gas inside the fixed block through the first fan blade to make the temperature of the cold air inside the fixed block more uniform and avoid local high temperature of the air inside the fixed block. Equipped with an ice-breaking component, the liquid at the liquid outlet condenses into ice fragments. The ice-water mixture at the liquid outlet can flow normally inside the delivery pipe. When the ice at the liquid outlet is large, it can be broken by the second fan blade to avoid blockage of the liquid outlet and the delivery pipe. The freezing and ice-breaking components work together to ensure that the liquid flowing inside the fixed tube is cooled to a suitable temperature, thus reaching the crystallization temperature. The second blade can break up larger crystals, ensuring that the ice-water mixture flows from the delivery pipe, keeping the fixed tube and delivery pipe in an ice-water mixture state. Attached Figure Description

[0015] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0016] Figure 1 This is a structural diagram of the main body of the present invention; Figure 2 This is a schematic diagram of the supercooled water preparation unit of the present invention; Figure 3 This is a schematic diagram of the freezing component of the present invention; Figure 4 This is a schematic diagram of the first drive motor and the first fan blade of the present invention; Figure 5 This is a schematic diagram of the first fan blade and rubber ring of the present invention; Figure 6 This is a schematic diagram of the fixing tube and plug of the present invention; Figure 7 This is a schematic diagram of the ice-breaking component of the present invention; Figure 8 This is a schematic diagram of the first drive motor and the liquid outlet of the present invention; Figure 9 This is a flowchart of the method of the present invention.

[0017] In the diagram: 100, supercooled water preparation unit; 200, instantaneous cavitation crystallization unit; 300, ice slurry storage unit; 400, filter; 500, freezing assembly; 600, ice-breaking assembly; 101, cold air inlet; 102, cold air outlet; 103, liquid inlet; 104, liquid outlet; 105, lower fixed plate; 106, upper fixed plate; 501, fixed block; 502, mixing chamber; 503, first drive motor; 504, first fan blade; 505, fixed pipe; 506, second fixed shaft; 507, rubber ring; 508, block; 509, first venting groove; 510, second venting groove; 601, second motor; 602, first fixed shaft; 603, second fan blade. Detailed Implementation

[0018] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Example 1:

[0019] Please see Figure 1 - Figure 6As shown, a subcooled water ice maker based on instantaneous cavitation crystallization technology includes a subcooled water preparation unit 100, an instantaneous cavitation crystallization unit 200, a filter 400, and an ice slurry storage unit 300. The subcooled water preparation unit 100 includes a lower fixed plate 105 and an upper fixed plate 106. At the four corners of the lower fixed plate 105 and the upper fixed plate 106, a cold air inlet 101, a cold air outlet 102, a liquid inlet 103, and a liquid outlet 104 are respectively provided. The subcooled water preparation unit 100 uses a plate heat exchanger. Pure water enters the interior of the fixed blocks 501 of the subcooled water preparation unit 100 from the liquid inlet 103, and the liquid inside each fixed block 501 is discharged from the liquid outlet 104. Cooling gas is generated by compressed gas and introduced into the cold air inlet 101. The cooling gas and liquid form a convection differential, causing the cooling gas to exit from the cold air outlet 102. A refrigeration assembly 500 is disposed between the lower fixed plate 105 and the upper fixed plate 106. The refrigeration assembly 500 includes several sets of fixing blocks 501, which are arranged in rows between the lower fixed plate 105 and the upper fixed plate 106. Two corners of each fixing block 501 have a first vent groove 509 and a second vent groove 510 for gas flow. Cooling gas from the cold air inlet 101 enters the fixing block 501 through the first vent groove 509, and gas from the cold air outlet 102 exits through the second vent groove 510. The air is discharged from the gas trough 510. A first drive motor 503 is mounted on the surface of the upper fixed plate 106. A second fixed shaft 506 is mounted on the output end of the first drive motor 503. A first fan blade 504 is sleeved in the middle of the second fixed shaft 506 and inside each fixed block 501. The first fan blade 504 is used to stir the airflow in the fixed block 501. The first drive motor 503 drives the second fixed shaft 506 to rotate, so that the first fan blade 504 outside the second fixed shaft 506 stirs the gas inside the fixed block 501. The gas can exchange heat with the liquid inside the fixed tube 505, thereby transferring the heat of the cooling air to the inside of the fixed tube 505. The liquid inside the fixed tube 505 is cooled to a temperature range of -3.0℃ to -0.5℃. Each fixed block 501 has staggered fixed tubes 505 installed inside. The liquid inside the fixed tube 505 comes into contact with the cooling airflow inside the fixed block 501, and the liquid in the fixed tube 505 comes into contact with the gas in the fixed block 501 for heat exchange. The two ends of the fixed tube 505 are connected to the liquid inlet 103 and the liquid outlet 104, respectively. The cooling gas inside the fixed block 501 can lower the liquid in the fixed tube 505, thereby lowering the liquid to an ice-water mixture state. The ice-water mixture flows with the water flow, ensuring that it can flow while also preparing for ice making.

[0020] Please see Figure 2 and Figure 3As shown, the liquid outlet 104, instantaneous cavitation crystallization unit 200, filter 400 and ice slurry storage unit 300 of the supercooled water preparation unit 100 are connected in sequence. Each of the first venting grooves 509 is located at the contact point between the cold air inlet 101 and each of the fixed blocks 501. Each of the second venting grooves 510 is located at the contact point between the cold air outlet 102 and each of the fixed blocks 501. A mixing chamber 502 is opened inside the fixed block 501. A sealing gasket is installed at the contact point of each fixed block 501 and at the edge of the mixing chamber 502. The sealing gasket is used to prevent gas from leaking from the fixed block 501. The supercooled water preparation unit 100 is started to exchange heat between the purified water and the refrigerant. Compressed air is introduced into the high-pressure tank of the instantaneous cavitation crystallization unit 200. When the supercooled water is delivered to the cavitation chamber of the instantaneous cavitation crystallization unit 200 by the delivery pump, the supercooled water is delivered to the cavitation chamber of the instantaneous cavitation crystallization unit 200.

[0021] Please see Figure 4 and Figure 5 As shown, the second fixed shaft 506 passes through the center of each fixed block 501. A rubber ring 507 is fitted on the cylindrical surface of the second fixed shaft 506 at the intersection of the second fixed shaft 506 and each fixed block 501. The rubber ring 507 is used to prevent gas leakage inside each fixed block 501. The second fixed shaft 506 is sealed by the rubber ring 507, thereby preventing gas from leaking out of the fixed block 501. The rotation of the second fixed shaft 506 drives the first fan blade 504 to rotate, which can exchange heat between the cooling gas and the liquid.

[0022] Please see Figure 2 - Figure 4 As shown, the cooling gas from the cold air inlet 101 enters the interior of each fixed block 501 and is discharged from the cold air outlet 102. The liquid from the liquid inlet 103 enters the interior of each fixed block 501 and is discharged from the liquid outlet 104. The liquid flow rate is less than the cooling gas flow rate, ensuring that the substance discharged from the liquid outlet 104 is an ice-water mixture. The liquid flow rate being less than the cooling gas flow rate ensures that the gas absorbs the heat from the liquid, thereby reducing the liquid temperature to a suitable level.

[0023] Please see Figure 4 and Figure 6 As shown, the fixed pipe 505 is arranged in a mesh shape, which allows the cooling gas to fully exchange heat with the liquid. The horizontal position of the fixed pipe 505 is offset from the horizontal position of the first fan blade 504. The offset between the fixed pipe 505 and the first fan blade 504 can prevent the first fan blade 504 from damaging the fixed pipe 505. Blocks 508 are provided on both sides of the fixed pipe 505. The blocks 508 on both sides are respectively locked into the two side walls of the fixed block 501. The blocks 508 are inserted into the two side walls of the fixed block 501, so that the fixed block 501 can be installed on the two side walls of the fixed block 501.

[0024] Please see Figure 6 As shown, both sides of the fixed tube 505 are connected to two plugs 508 by nuts. The interior of the fixed tube 505 is connected to the liquid inlet 103 and the liquid outlet 104 through the plugs 508 on both sides. The inner diameter of the fixed tube 505 is greater than or equal to 1 / 10 of the diameter of the liquid outlet 104. The liquid flows from one end of the fixed tube 505 to the other end. The diameter of the fixed tube 505 is limited to prevent the liquid inside the fixed tube 505 from cooling and crystallizing and blocking it, so that the liquid inside the fixed tube 505 cools into an ice-water mixture.

[0025] Please see Figure 2 , Figure 7 and Figure 8 As shown, an ice-breaking assembly 600 is provided inside the liquid outlet 104. The ice-breaking assembly 600 includes a second motor 601, which is mounted on the upper surface of the upper fixed plate 106 by bolts, allowing the second motor 601 to rotate normally. A first fixed shaft 602 is provided at the output end of the second motor 601, located inside the liquid outlet 104. A plurality of second fan blades 603 are sleeved on the outside of the first fixed shaft 602. The first fixed shaft 602 rotates synchronously. The first fixed shaft 602 is used to prevent the ice-water mixture inside the liquid outlet 104 from condensing and thus preventing it from moving along the inside of the liquid outlet 104. The second motor 601 drives the first fixed shaft 602 to rotate, causing the second fan blade 603 on the first fixed shaft 602 to rotate. The second fan blade 603 can break up larger condensed blocks inside the liquid outlet 104, preventing ice blocks inside the liquid outlet 104 from blocking the inside of the liquid outlet 104, and ensuring that the ice blocks inside the fixed tube 505 and the liquid outlet 104 do not form large lumps.

[0026] Please see Figure 9 The operating method of a subcooled water ice maker based on instantaneous cavitation crystallization technology, applied to the aforementioned subcooled water ice maker, includes the following steps: S1. Equipment preparation before operation: Check each component unit in the subcooled water preparation unit 100, instantaneous cavitation crystallization unit 200, ice slurry storage unit 300 and filter 400 to ensure that the connections between each device are secure. Confirm that the connections of each component unit of the subcooled water ice maker are secure and leak-free, and that each component is in good working order. Check the subcooled water preparation unit 100, instantaneous cavitation crystallization unit 200, ice slurry storage unit 300, filter 400, control system and related testing equipment. S2. Raw material preparation and parameter setting: Pure water is injected into the interior of each fixed block 501 through the liquid inlet 103. After being processed by the refrigeration component 500, the ice-water mixture is discharged through the liquid outlet 104. The temperature of the cold air inlet 101 and the temperature of the liquid inlet 103 are set, as well as the flow rate of the liquid and the flow rate of the cooling gas. Pure water that meets the requirements is injected to ensure that the water quality is free of impurities and to avoid affecting the crystal nucleus generation and equipment operation. Key operating parameters are preset through the PLC control system, including the target temperature of the subcooled water, the target pressure after decompression, the decompression rate, and the flow rate of the subcooled water in the cavitation chamber. S3, Subcooled Water Preparation Stage: The subcooled water preparation unit 100 is started to exchange heat between the purified water and the refrigerant through a plate heat exchanger, gradually cooling the water to the preset subcooled water target temperature. During this period, the subcooled water temperature is monitored in real time by a platinum resistance thermometer to ensure that the temperature remains stable within the set range. S4. Pre-treatment of cavitation crystallization unit: Compressed air is introduced into the high-pressure gas tank of instantaneous cavitation crystallization unit 200. The air pressure is adjusted by the control system to reach the preset initial pressure. At the same time, ensure that there is no leakage in the gas delivery pipeline and related valves, and wait for the trigger command. S5. Subcooled water delivery and cavitation triggering: After the subcooled water temperature stabilizes in the target range, the delivery pump is started to deliver the subcooled water to the interior of the instantaneous cavitation crystallization unit 200. The air is instantaneously depressurized according to the preset depressurization rate, generating a cavitation effect and triggering rapid nucleation of the subcooled water. After the subcooled water temperature stabilizes in the target range, the delivery pump is started to deliver the subcooled water to the cavitation cavity of the instantaneous cavitation crystallization unit 200 at a flow rate of 1 m / s. The control system triggers the solenoid valve to achieve instantaneous depressurization of the air according to the preset depressurization rate, thereby reducing the pressure in the cavitation cavity and generating a cavitation effect, triggering rapid nucleation of the subcooled water. S6. Crystal nucleus and undercooling monitoring: Detect the number and size distribution of crystal nuclei during cavitation-induced crystallization. S7. Treating the accumulation of crystal nuclei: When the accumulation of crystal nuclei is large, the ice-breaking component 600 is activated to break up the accumulated crystal nuclei, thereby facilitating the transport of crystal nuclei along the conveying pipe and preventing ice from blocking the liquid outlet 104. S8. Ice Slurry Generation and Storage: After cavitation crystallization, supercooled water undergoes phase change to generate ice slurry. After passing through filter 400 to remove excess impurities and agglomerated large ice crystals, the ice slurry enters the ice slurry storage unit 300 for temporary storage. During the storage process, the ice content of the ice slurry is monitored in real time to ensure that it is stable at about 45% and there is no obvious agglomeration of large ice crystals. S9. Shutdown Procedure: Stop cavitation triggering and subcooled water preparation, stop supplying compressed air to the cavitation chamber, stop subcooled water generation and delivery, then drain all the ice slurry from the ice slurry storage unit 300, turn off the main power supply of the ice maker, release the remaining pressure in the high-pressure gas tank, close the solenoid valve through the control system, stop supplying compressed air to the cavitation chamber, terminate the cavitation crystallization process, turn off the heat exchanger and delivery pump of the subcooled water preparation unit 100, stop subcooled water generation and delivery, drain all the ice slurry from the ice slurry storage unit 300, and then clean the cavitation chamber, filter 400, delivery pipeline and other components to remove residual ice crystals and impurities to prevent freezing and blockage.

[0027] In step S3, the initial temperature of the purified water is 25℃, and the target temperature range of the subcooled water is -3.0℃ to -0.5℃. The subcooled water temperature is monitored in real time using a platinum resistance thermometer to ensure that the temperature remains stable within the set range. In step S4, the initial air pressure is 1.8MPa. In step S5, the subcooled water is delivered to the cavitation chamber of the instantaneous cavitation crystallization unit 200 at a flow rate of 1m / s, and the pressure inside the cavitation chamber drops to 0.1MPa. In step S6, the number of crystal nuclei is stabilized at 1.2×10⁻⁶. 5 per mL.

[0028] In step S3, pure water enters through liquid inlet 103 and exits through liquid outlet 104, while cooling gas enters through cold air inlet 101 and exits through cold air outlet 102. The first fan blade 504 is used to accelerate the heat exchange between the cooling gas and pure water. In step S8, the number of crystal nuclei is greater than 2.0 × 10⁻⁶. 5 When the number of crystals per mL is 603, the second blade breaks the crystal nuclei.

[0029] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to any specific implementation. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A subcooled water ice maker based on instantaneous cavitation crystallization technology, comprising a subcooled water preparation unit (100), an instantaneous cavitation crystallization unit (200), a filter (400), and an ice slurry storage unit (300), wherein the subcooled water preparation unit (100) comprises a lower fixed plate (105) and an upper fixed plate (106), and a cold air inlet (101), a cold air outlet (102), a liquid inlet (103), and a liquid outlet (104) are respectively provided at the four corners of the lower fixed plate (105) and the upper fixed plate (106), characterized in that, A refrigeration assembly (500) is disposed between the lower fixed plate (105) and the upper fixed plate (106). The refrigeration assembly (500) includes several sets of fixing blocks (501). The fixing blocks (501) are arranged in rows between the lower fixed plate (105) and the upper fixed plate (106). A first venting groove (509) and a second venting groove (510) for gas flow are provided at two corners of the fixing blocks (501). A first drive motor (503) is mounted on the surface of the upper fixed plate (106). A second fixed shaft (506) is mounted on the output end of the first drive motor (503). The second fixed shaft (506) is located in the middle and inside each fixed block (501) and is fitted with a first fan blade (504). The first fan blade (504) is used to stir the airflow in the fixed block (501). Each fixed block (501) is equipped with staggered fixed tubes (505). The liquid inside the fixed tube (505) is in contact with the cooling airflow inside the fixed block (501). The liquid in the fixed tube (505) is in contact with the gas in the fixed block (501) for heat exchange. The two ends of the fixed tube (505) are connected to the liquid inlet (103) and the liquid outlet (104) respectively.

2. The subcooled water ice maker based on instantaneous cavitation crystallization technology according to claim 1, characterized in that, The liquid outlet (104), instantaneous cavitation crystallization unit (200), filter (400) and ice slurry storage unit (300) of the supercooled water preparation unit (100) are connected in sequence. Each of the first venting grooves (509) is located at the contact point between the cold air inlet (101) and each of the fixed blocks (501). Each of the second venting grooves (510) is located at the contact point between the cold air outlet (102) and each of the fixed blocks (501). A mixing chamber (502) is opened inside the fixed block (501). A sealing gasket is installed at the contact point of each fixed block (501) and at the edge of the mixing chamber (502).

3. The subcooled water ice maker based on instantaneous cavitation crystallization technology according to claim 2, characterized in that, The second fixed shaft (506) passes through the center of each fixed block (501), and a rubber ring (507) is fitted on the cylindrical surface of the second fixed shaft (506) at the intersection of the second fixed shaft (506) and each fixed block (501).

4. The subcooled water ice maker based on instantaneous cavitation crystallization technology according to claim 3, characterized in that, The cooling gas from the cold air inlet (101) enters the interior of each fixed block (501) and is discharged from the cold air outlet (102). The liquid from the liquid inlet (103) enters the interior of each fixed block (501) and is discharged from the liquid outlet (104). The liquid flow rate is less than the cooling gas flow rate, ensuring that the substance discharged from the liquid outlet (104) is an ice-water mixture.

5. The subcooled water ice maker based on instantaneous cavitation crystallization technology according to claim 4, characterized in that, The fixed tube (505) is arranged in a mesh shape, and the horizontal position of the fixed tube (505) is offset from the horizontal position of the first fan blade (504). Blocks (508) are provided on both sides of the fixed tube (505), and the blocks (508) on both sides are respectively stuck on the two side walls of the fixed block (501).

6. The subcooled water ice maker based on instantaneous cavitation crystallization technology according to claim 5, characterized in that, Both sides of the fixed tube (505) are connected to two plugs (508) by nuts. The inside of the fixed tube (505) is connected to the liquid inlet (103) and the liquid outlet (104) through the plugs (508) on both sides. The inner diameter of the fixed tube (505) is greater than or equal to 1 / 10 of the diameter of the liquid outlet (104).

7. The subcooled water ice maker based on instantaneous cavitation crystallization technology according to claim 6, characterized in that, An ice-breaking assembly (600) is provided inside the liquid outlet (104). The ice-breaking assembly (600) includes a second motor (601). The second motor (601) is mounted on the upper surface of the upper fixed plate (106). A first fixed shaft (602) is provided at the output end of the second motor (601). The first fixed shaft (602) is located inside the liquid outlet (104). A plurality of second fan blades (603) are sleeved on the outside of the first fixed shaft (602). The second fan blades (603) rotate synchronously with the first fixed shaft (602).

8. A method for operating a subcooled water ice maker based on instantaneous cavitation crystallization technology, applicable to the subcooled water ice maker based on instantaneous cavitation crystallization technology as described in claim 7, characterized in that, Includes the following steps: S1. Equipment preparation before operation: Check each component unit in the supercooled water preparation unit (100), instantaneous cavitation crystallization unit (200), ice slurry storage unit (300) and filter (400) to ensure that the connections between each device are secure. S2. Raw material preparation and parameter setting: Pure water is injected into the interior of each fixed block (501) through the liquid inlet (103). The mixture of ice and water is discharged through the liquid outlet (104) after being processed by the refrigeration component (500). The temperature at the cold air inlet (101) and the temperature at the liquid inlet (103) are set, as well as the flow rate of the liquid and the flow rate of the cooling gas are set. S3, Subcooled water preparation stage: Start the subcooled water preparation unit (100) to exchange heat between the purified water and the cooling gas through the plate heat exchanger, and gradually cool down to the preset subcooled water target temperature; S4. Pretreatment of cavitation crystallization unit: Compressed air is introduced into the high-pressure gas tank of the instantaneous cavitation crystallization unit (200), and the air pressure is adjusted by the control system to reach the preset initial pressure. S5. Subcooled water delivery and cavitation triggering: After the subcooled water temperature stabilizes in the target range, the delivery pump is started to deliver the subcooled water to the interior of the instantaneous cavitation crystallization unit (200). The air is instantaneously depressurized according to the preset depressurization rate, generating a cavitation effect and triggering rapid nucleation of the subcooled water. S6. Crystal nucleus and undercooling monitoring: Detect the number and size distribution of crystal nuclei during cavitation-induced crystallization. S7. Processing the accumulation of crystal nuclei: When the accumulation of crystal nuclei is large, start the ice-breaking component (600) to break up the accumulated crystal nuclei. S8. Ice slurry generation and storage: After cavitation crystallization, supercooled water undergoes phase transformation to generate ice slurry. After the ice slurry passes through a filter (400) to remove excess impurities and agglomerated large ice crystals, it enters the ice slurry storage unit (300) for temporary storage. S9. Shutdown procedure: Stop cavitation triggering and subcooled water preparation, stop supplying compressed air to the cavitation chamber, stop subcooled water generation and delivery, then export all the ice slurry in the ice slurry storage unit (300), turn off the main power supply of the ice maker, and release the remaining pressure in the high-pressure gas tank.

9. The operating method of the subcooled water ice maker based on instantaneous cavitation crystallization technology according to claim 8, characterized in that, In step S3, the initial temperature of the purified water is 25℃, and the target temperature range of the subcooled water is -3.0℃ to -0.5℃. The subcooled water temperature is monitored in real time using a platinum resistance thermometer to ensure that the temperature remains stable within the set range. In step S4, the initial air pressure is 1.8MPa. In step S5, the subcooled water is delivered to the cavitation chamber of the instantaneous cavitation crystallization unit (200) at a flow rate of 1m / s, and the pressure inside the cavitation chamber drops to 0.1MPa. In step S6, the number of crystal nuclei is stabilized at 1.2×10⁻⁶. 5 per mL.

10. The operating method of the subcooled water ice maker based on instantaneous cavitation crystallization technology according to claim 9, characterized in that, In step S3, the purified water enters from the liquid inlet (103) and exits from the liquid outlet (104), while the cooling gas enters from the cold air inlet (101) and exits from the cold air outlet (102); in step S8, the number of crystal nuclei is greater than 2.0 × 10⁻⁶. 5 When the number of crystals is 1 / mL, the second blade (603) breaks the crystal nuclei.

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