High-efficiency seawater ice making device

Abstract

The invention relates to the technical field of seawater ice-making devices, and discloses a high-efficiency seawater ice-making device, comprising an ice-making cylinder, a rotating shaft, a scraper, a spray pipe and a water collecting pipe. The rotating shaft is arranged at the axis of the ice-making cylinder to drive the scraper and the spray pipe to rotate. A gap is arranged in the ice-making cylinder, and a condensing pipe containing a refrigerant is arranged in the gap. The spraying pipe is connected to a water storage tank, and liquid in the water tank is sprayed onto the inner wall of the ice-making cylinder for heat exchange and condensation. Uncondensed liquid is collected by a water collecting tank connected to the water collecting pipe. An auxiliary cold pipe is arranged in the ice-making cylinder, and the inner wall of the ice-making cylinder is cooled by contact with the condensing pipe. The condensing pipe is connected to a brine water delivery pipe. When the ice-making cylinder makes ice, a reagent capable of endothermic reaction is introduced into the condensing pipe, and the ice-making cylinder is cooled by endothermic reaction in the reaction process. The condensation area of ​​the refrigeration cylinder is greatly increased by the endothermic effect of the auxiliary cold pipe and the use in conjunction with the condensing pipe, and the number of condensing pipes that need to be arranged is effectively reduced.

Description

Technical Field

[0001] The invention relates to the technical field of seawater ice-making devices, in particular to a high-efficiency seawater ice-making device. Background Art

[0002] Seawater ice machine, also known as marine ice machine or marine flake ice machine, is a type of ice machine, usually installed on fishing boats, which uses seawater as a cooling source to make ice, and the daily output is generally 1 to 5 tons. The main features of this machine are that it can adapt to the swaying of fishing boats, resist the erosion of seawater, and adapt to the marine environment. The working principle of the seawater ice machine is mainly to use the refrigerant to absorb heat from the seawater during the circulation process, so that the seawater can be cooled and slowly frozen into ice. This process is actually reverse: the refrigerant absorbs heat from the seawater to cool it down, and then the heat is transferred to the evaporator to make the refrigerant gaseous again, thus completing a cycle.

[0003] Because most seawater ice machines, i.e. flake ice machines, use seawater spraying onto the surface of the evaporator to condense it, and then scraping it off with a scraper. Seawater has a certain amount of salt, which causes its condensation temperature to decrease. Therefore, in order to condense seawater on the surface of the evaporator, the ice maker needs to use higher power to ensure its condensation efficiency. And because the refrigeration cylinder generally has a large area, it is necessary to lay out many condensing tubes to ensure that the seawater on the surface can condense. At the same time, during the seawater ice-making process, a large amount of uncondensed salt water will drip, which is difficult for the staff to handle in a centralized manner. This will cause this part of the seawater to come into contact with other metal equipment, causing corrosion, which greatly reduces the service life of the equipment. Summary of the invention

[0004] (I) Technical problems to be solved: In view of the deficiencies of the prior art, the present invention provides a high-efficiency seawater ice-making device, which has the advantages of high-efficiency refrigeration and ice-making, and solves the problems of low seawater condensation and insufficient ice-making efficiency.

[0005] (II) Technical solution: In order to achieve the above-mentioned purpose of efficient refrigeration and ice making, the present invention provides the following technical solution: a high-efficiency seawater ice-making device, comprising an ice-making cylinder, a rotating shaft, a scraper, a spray pipe and a water collecting pipe. The rotating shaft is arranged at the axis of the ice-making cylinder to drive the scraper and the spray pipe to rotate. A gap is provided in the ice-making cylinder, and a condenser pipe containing a refrigerant is provided in the gap. The spray pipe is connected to a water storage tank, and the liquid in the water tank is sprayed onto the inner wall of the ice-making cylinder for heat exchange and condensation. The uncondensed liquid is collected by a water collecting tank connected to the water collecting pipe. An auxiliary cold pipe is provided in the ice-making cylinder, and the inner wall of the ice-making cylinder is cooled by contact with the condenser pipe. The auxiliary cold pipe is connected to a brine water supply pipe, and concentrated brine is added to the auxiliary cold pipe through the brine water supply pipe for dilution to perform auxiliary cooling.

[0006] The condensing tubes and the auxiliary cooling tubes are arranged alternately and in a circular array in the ice making cylinder.

[0007] The condenser is arranged inside the auxiliary cold pipe, and both the condenser and the auxiliary cold pipe are in contact with the inner wall of the ice making cylinder. The auxiliary cold pipe is connected to the brine water delivery pipe. The condenser passes through the auxiliary cold pipe and is connected to each other for communication.

[0008] A brine water collecting tank is provided below the inner wall of the ice making cylinder, and the brine water collecting tank is connected to a brine water collecting pipe, through which the brine collected in the brine water collecting tank can be transported to the brine water delivery pipe.

[0009] A reverse osmosis membrane is arranged in the pipe connecting the water storage tank and the spray pipe, and a high-concentration pipe is arranged on the high-pressure side of the reverse osmosis membrane, the high-concentration pipe is connected to the brine water pipe, and the pipe on the other side of the reverse osmosis membrane is a low-concentration pipe connected to the spray pipe.

[0010] The reverse osmosis membrane is made of polyamide membrane.

[0011] The outer side of the scraper is provided with spiral patterns.

[0012] (III) Beneficial effects: Compared with the prior art, the present invention provides a highly efficient seawater ice-making device, which has the following beneficial effects:

[0013] 1. This high-efficiency seawater ice-making device can dilute the brine by passing high-concentration brine into auxiliary cold water. This process is an endothermic process that can absorb heat from the condenser. This not only helps to reduce the temperature of the inner wall of the ice-making cylinder in contact with the auxiliary cold pipe and maintain its efficient ice-making performance, but also reduces the need for additional cooling, thereby reducing energy consumption. By collecting and reusing dripping high-concentration brine, it not only reduces wastewater discharge, but also realizes resource recycling, which not only helps environmental protection, but also reduces production costs, improves the economic benefits of enterprises, and reduces the steps of treating wastewater and replenishing fresh water, which not only improves the convenience of operation, but also reduces maintenance and management costs.

[0014] 2. The high-efficiency seawater ice-making device, through the pre-desalination effect of the reverse osmosis membrane, divides seawater into desalinated seawater and high-salinity seawater, and uses the desalinated seawater to make ice. After the high-salinity seawater is passed into the auxiliary cooling pipe for dilution, it absorbs heat to assist in cooling the wall of the ice-making tube. Using desalinated seawater to make ice can significantly reduce the salt and other impurities in the ice, making the ice produced purer and meeting the high requirements for water quality in various applications. The dilution process of high-salinity seawater in the auxiliary cooling pipe will absorb heat, which helps to reduce the temperature of the auxiliary cooling pipe and improve the ice-making efficiency. This natural cooling method reduces the additional cooling demand, reduces energy consumption, and also reduces the discharge of coolant, which is more environmentally friendly. The high-salinity seawater separated by the reverse osmosis membrane is not wastewater, but can be passed into the auxiliary cooling pipe for reuse. This recycling method not only reduces the discharge of wastewater, but also improves the utilization efficiency of water resources, and realizes the maximum utilization of resources. At the same time, the seawater with high salt concentration can be discharged and treated in a centralized manner, avoiding the possibility of seawater corroding other metal equipment.

[0015] 3. The high-efficiency seawater ice-making device is arranged inside the auxiliary cold pipe through a condenser, and the condenser and the auxiliary cold pipe are in contact with the inner wall of the ice-making cylinder, the auxiliary cold pipe is connected with the brine water delivery pipe, and the condenser passes through the auxiliary cold pipe and is connected to each other for communication, and the condenser is wrapped by the auxiliary cold pipe, which effectively reduces the cold air loss on the non-contact surface between the condenser and the inner wall of the ice-making cylinder, which means that more cold air is used in the ice-making process instead of escaping into the environment, thereby further improving the refrigeration efficiency, and because the liquid inside the auxiliary cold pipe has a high salt content, its condensation point is greatly reduced, and while having the same temperature as the condenser, it will not freeze itself, thereby increasing the condensation area on the inner wall of the ice-making cylinder, and due to the existence of the auxiliary cold pipe, the condensation area on the inner wall of the ice-making cylinder is increased, which means that in the same time, more seawater can condense into ice on the inner wall of the ice-making cylinder, thereby improving the ice-making output, effectively reducing the number of condenser pipes that need to be laid, reducing the use of refrigerant and reducing power. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the present invention;

[0017] Figure 2 It is a schematic cross-sectional view of Embodiment 1 and Embodiment 3 of the present invention;

[0018] Figure 3 Detailed schematic diagram of pipelines of Embodiment 1 and Embodiment 3 of the present invention;

[0019] Figure 4 This is a schematic diagram of the arrangement of auxiliary cooling pipes in Embodiment 1 and Embodiment 2 of the present invention;

[0020] Figure 5 This is a schematic diagram of the arrangement of auxiliary cooling pipes in Embodiment 3 and Embodiment 4 of the present invention;

[0021] Figure 6 It is a sectional isometric view of Embodiment 2 and Embodiment 4 of the present invention;

[0022] Figure 7 It is a cutaway formal diagram of Embodiment 2 and Embodiment 4 of the present invention;

[0023] Figure 8 It is a schematic diagram of the cutaway details of Embodiment 2 and Embodiment 4 of the present invention;

[0024] Fig. 9 This is a schematic diagram of the position of the reverse osmosis membrane in the second and fourth embodiments of the present invention.

[0025] In the figure: 1, ice making cylinder; 2, rotating shaft; 21, scraper; 22, spray pipe; 23, water collecting pipe; 101, condenser pipe; 102, auxiliary cooling pipe; 201, brine water delivery pipe; 202, brine water collecting pipe; 203, brine water collecting tank; 204, high concentration pipe; 205, low concentration pipe; 231, water collecting tank. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Example

[0027] See also Figure 1-Figure 3The invention discloses a high-efficiency seawater ice-making device, comprising an ice-making cylinder 1, a rotating shaft 2, a scraper 21, a spray pipe 22 and a water collecting pipe 23. The rotating shaft 2 is arranged at the axis of the ice-making cylinder 1 to drive the scraper 21 and the spray pipe 22 to rotate. A gap is arranged in the ice-making cylinder 1, and a condensing pipe 101 containing a refrigerant is arranged in the gap. The spray pipe 22 is connected to a water storage tank to spray the liquid in the water tank onto the inner wall of the ice-making cylinder 1 for heat exchange and then condensation. The uncondensed liquid is collected by a water collecting tank 231 connected to the water collecting pipe 23. The ice-making cylinder 1 is provided with an auxiliary cold pipe 102, which is connected to the condensing pipe 101. The inner wall of the ice making cylinder 1 is cooled by contact. The condenser 101 is connected to the brine water pipe 201. When the ice making cylinder 1 is making ice, the auxiliary cooling pipe 102 is connected to the brine water pipe 201. Concentrated brine is added into the auxiliary cooling pipe 102 through the brine water pipe 201 and then diluted to perform auxiliary cooling. This is because when the concentrated brine is diluted, the increase in water molecules causes the distance between salt molecules to increase. This process requires the absorption of heat to overcome the interaction force between molecules. Part of the heat is absorbed through this endothermic process, so that the temperature of the inner wall of the ice making cylinder 1 is reduced.

[0028] See also Figure 4 The condensing tube 101 and the auxiliary cooling tube 102 are arranged alternately in a circular array in the ice-making cylinder 1. Because the auxiliary cooling tube 102 is close to the condensing tube 101, when the condensing tube 101 cools down the inner wall of the ice-making cylinder 1, it will also cool down the auxiliary cooling tube 102. Moreover, because the liquid inside the auxiliary cooling tube 102 has a high salt content, its freezing point is greatly reduced. While having the same temperature as the condensing tube 101, it will not freeze itself, thereby increasing the condensation area on the inner wall of the ice-making cylinder 1. At the same time, concentrated brine is continuously added to the auxiliary cooling tube 102 for dilution to perform an endothermic reaction. By using fewer condensing tubes 101, a larger cooling area and higher cooling efficiency can be obtained, thereby greatly improving the ice-making efficiency.

[0029] See also Figure 2-Figure 3A salt water collecting tank 203 is provided below the inner wall of the ice making cylinder 1, and the salt water collecting tank 203 is connected to the salt water collecting pipe 202. The salt water collected in the salt water collecting tank 203 can be transported to the salt water delivery pipe 201 through the salt water collecting pipe 202. During the condensation process of seawater, when the seawater temperature drops below the freezing point, the water molecules in the seawater will begin to crystallize to form ice crystals. In this process, the salt in the seawater cannot participate in the crystallization process, so it will be excluded from the ice crystals to form uncondensed seawater with higher salinity. When ice crystals are formed, they will repel the surrounding water molecules, causing the water molecules to form a layer of uncondensed liquid around the ice crystals. This layer of liquid contains a higher salt content, because the salt cannot enter the ice crystals. When the seawater temperature continues to drop, more water molecules will crystallize to form ice crystals, and the salt concentration in the uncondensed liquid will become higher and higher. This part of the high-salt concentration liquid will flow down from the wall of the ice making cylinder 1 and enter the salt water collecting tank 203. After being collected in the water tank 203, the brine is added to the auxiliary cooling pipe 102 from the brine water pipe 201. The whole process does not require additional concentrated brine. The concentrated brine precipitated when the seawater freezes is used to collect and reuse it, which improves the resource utilization rate. At the same time, the seawater with high salt concentration is collected to avoid it dripping on the metal equipment or deck on the ship. The seawater contains a high concentration of salt, especially chloride ions, which makes most metal structures have high corrosion activity in seawater. Chloride ions can react with the oxide film on the metal surface, destroying its protective effect, and then accelerating the corrosion process of the metal. Secondly, the electrical conductivity of seawater is very high, which makes it an ideal electrolyte that can accelerate the electrochemical corrosion process of the metal. In electrochemical corrosion, the metal is oxidized as the anode, and the dissolved oxygen in the seawater accepts electrons as the cathode to form a corrosion current, causing the metal to gradually dissolve. Its collection protects metal equipment that has not been treated with anti-corrosion from corrosion.

[0030] The scraper 21 is provided with a spiral pattern on the outside. The scraper design with the spiral pattern makes the ice scraping process more continuous and uniform. When the scraper 21 rotates, the spiral pattern can effectively scrape the ice layer from the surface of the evaporator, and this continuous scraping action can prevent the excessive accumulation of ice layer in a local position, thereby ensuring the uniformity and consistency of the ice. The spiral pattern helps to improve the ice scraping efficiency of the scraper 21. Due to the special design of the spiral pattern, the scraper 21 can generate a greater scraping force during the rotation process, making it easier to scrape the ice layer, which can not only reduce the time and energy required for scraping ice, but also improve the overall efficiency of the ice maker. The spiral pattern can also help reduce the damage of the scraper 21 to the evaporator surface. Compared with scrapers 21 of other shapes, the scraper 21 with spiral pattern can better adapt to the curvature change of the evaporator surface during the ice scraping process, reduce friction and impact during the scraping process, and thus extend the service life of the evaporator. The scraper 21 with spiral pattern can also help prevent ice blockage and accumulation. During the ice scraping process, the spiral pattern can effectively push the scraped ice flakes to the ice drop port to prevent them from being blocked and accumulated on the scraper 21 or the evaporator surface. This can not only maintain the normal operation of the ice maker, but also reduce the frequency of maintenance and cleaning. Example

[0031] See also Figure 1 and Figure 6-Figure 8 The invention discloses a high-efficiency seawater ice-making device, comprising an ice-making cylinder 1, a rotating shaft 2, a scraper 21, a spray pipe 22 and a water collecting pipe 23. The rotating shaft 2 is arranged at the axis of the ice-making cylinder 1 to drive the scraper 21 and the spray pipe 22 to rotate. A gap is arranged in the ice-making cylinder 1, and a condensing pipe 101 containing a refrigerant is arranged in the gap. The spray pipe 22 is connected to a water storage tank to spray the liquid in the water tank onto the inner wall of the ice-making cylinder 1 for heat exchange and then condensation. The uncondensed liquid is collected by a water collecting tank 231 connected to the water collecting pipe 23. The ice-making cylinder 1 is provided with an auxiliary cold pipe 102, which is connected to the condensing pipe 101. The inner wall of the ice making cylinder 1 is cooled by contact. The condenser 101 is connected to the brine water pipe 201. When the ice making cylinder 1 is making ice, the auxiliary cooling pipe 102 is connected to the brine water pipe 201. Concentrated brine is added into the auxiliary cooling pipe 102 through the brine water pipe 201 and then diluted to perform auxiliary cooling. This is because when the concentrated brine is diluted, the increase in water molecules causes the distance between salt molecules to increase. This process requires the absorption of heat to overcome the interaction force between molecules. Part of the heat is absorbed through this endothermic process, so that the temperature of the inner wall of the ice making cylinder 1 is reduced.

[0032] See also Figure 4The condensing tube 101 and the auxiliary cooling tube 102 are arranged alternately in a circular array in the ice-making cylinder 1. Because the auxiliary cooling tube 102 is close to the condensing tube 101, when the condensing tube 101 cools down the inner wall of the ice-making cylinder 1, it will also cool down the auxiliary cooling tube 102. Moreover, because the liquid inside the auxiliary cooling tube 102 has a high salt content, its freezing point is greatly reduced. While having the same temperature as the condensing tube 101, it will not freeze itself, thereby increasing the condensation area on the inner wall of the ice-making cylinder 1. At the same time, concentrated brine is continuously added to the auxiliary cooling tube 102 for dilution to perform an endothermic reaction. By using fewer condensing tubes 101, a larger cooling area and higher cooling efficiency can be obtained, thereby greatly improving the ice-making efficiency.

[0033] See also Fig. 9 A reverse osmosis membrane is arranged in the pipe connecting the water storage tank and the spray pipe 22, and a high-concentration pipe 204 is arranged on the high-pressure side of the reverse osmosis membrane. The high-concentration pipe 204 is connected to the salt water delivery pipe 201, and the pipe on the other side of the reverse osmosis membrane is a low-concentration pipe 205 connected to the spray pipe 22. The reverse osmosis membrane is a semi-permeable membrane made of a polymer material, which is manufactured by a special process and only allows water molecules to pass through, while preventing salt and other impurities from passing through. When seawater passes through the reverse osmosis membrane, water molecules can pass through the membrane layer, while salt and other dissolved substances are retained on one side of the membrane, thereby realizing the desalination of seawater. The desalinated seawater enters the spray pipe 22, and the desalinated seawater is sprayed onto the inner wall of the ice making cylinder 1 through the spray pipe 22. Because the internal salt content is greatly reduced after the seawater is desalinated, it is more convenient to use. It is easy to condense, thereby increasing the ice-making efficiency of the ice-making device. The salt that has not passed through the reverse osmosis membrane is under pressure and is carried into the high-concentration pipe 204 along with part of the seawater. The diameter of the high-concentration pipe 204 is small, so that most of the seawater passes through the reverse osmosis membrane and enters the low-concentration pipe 205. A small part of the seawater carries the salt that has not passed through and enters the high-concentration pipe 204, which increases the salt concentration of the seawater. The seawater with a high salt concentration is introduced into the brine water delivery pipe 201, and the seawater with a high salt concentration is introduced into the auxiliary cooling pipe 102 for dilution, and then heat is absorbed. The seawater can be simply desalinated and divided into two seawaters with different salt contents. At the same time, the setting of the high-concentration pipe 204 can effectively avoid the rupture of the reverse osmosis membrane due to excessive pressure when the seawater is pressed through the reverse osmosis membrane.

[0034] The reverse osmosis membrane is made of a polyamide membrane, which has a high flux characteristic, which means that it can process more seawater in the same time, thereby improving the desalination efficiency. The polyamide membrane has a high interception rate for salt, impurities and other pollutants in seawater, and can effectively remove salt from seawater, thereby achieving rapid desalination of seawater. The polyamide membrane has good stability to chemical substances in seawater, can resist chemical corrosion, and ensure the effect of long-term use.

[0035] Working principle: The seawater ice making machine used in fishing boats is usually a flake ice machine. A water pump is used to pump seawater into a circulating water storage tank. The seawater in the water storage tank is kept in a relatively low temperature range, usually 0~2℃. This temperature range helps the seawater to condense into ice more effectively in the subsequent ice-making process. The seawater in the water tank is sprayed onto the inner wall of the ice-making cylinder 1 through the spray pipe 22. The ice-making cylinder 1 is provided with a condenser 101 containing a refrigerant, so that the seawater and the refrigerant can exchange heat, so that the temperature of the seawater is rapidly reduced. As the temperature drops, the seawater begins to condense into an ice layer on the inner wall surface of the ice-making cylinder 1. When the ice layer condenses, When it reaches a certain thickness, the scraper 21 is rotated around the rotating shaft 2 to scrape off the ice layer. The freezing point of seawater is about -1.8°C, while the freezing point of fresh water is 0°C. This is because seawater contains a large amount of salt, which will lower the freezing point of seawater. During the condensation process of seawater, when the seawater temperature drops below the freezing point, the water molecules in the seawater will begin to crystallize to form ice crystals. In this process, the salt in the seawater cannot participate in the crystallization process, so it will be excluded from the ice crystals, forming uncondensed seawater with higher salinity. When ice crystals are formed, they will repel the surrounding water molecules, causing the water molecules to A layer of uncondensed liquid is formed around the ice crystals. This layer of liquid contains a high salt content. Because the salt cannot enter the ice crystals, when the seawater temperature continues to drop, more water molecules will crystallize to form ice crystals, and the salt concentration in the uncondensed liquid will become higher and higher. This part of the high-salt concentration liquid will flow down from the wall of the ice-making cylinder 1 and enter the brine collection tank 203. After being collected by the brine collection tank 203, it will be added to the auxiliary cooling pipe 102 from the brine water pipe 201. The auxiliary cooling pipe 102 contains a certain amount of low-concentration brine, and the added concentrated brine will be diluted to a certain extent. The dilution process of concentrated brine is an endothermic process. This is because when concentrated brine is diluted, the increase in water molecules causes the distance between salt molecules to increase. This process requires the absorption of heat to overcome the interaction force between molecules. Part of the heat is absorbed through this endothermic process, so that the temperature of the inner wall of the ice-making cylinder 1 is reduced. At the same time, the auxiliary cold pipe 102 has a high salt content, which can also effectively avoid low-temperature freezing. It can cool the inner wall of the ice-making cylinder 1 together with the condenser 101. When using a smaller number of condensers 101, the refrigeration area can be effectively increased, which greatly improves the refrigeration efficiency. Example

[0036] See also Figure 1-Figure 3The invention discloses a high-efficiency seawater ice-making device, comprising an ice-making cylinder 1, a rotating shaft 2, a scraper 21, a spray pipe 22 and a water collecting pipe 23. The rotating shaft 2 is arranged at the axis of the ice-making cylinder 1 to drive the scraper 21 and the spray pipe 22 to rotate. A gap is arranged in the ice-making cylinder 1, and a condensing pipe 101 containing a refrigerant is arranged in the gap. The spray pipe 22 is connected to a water storage tank to spray the liquid in the water tank onto the inner wall of the ice-making cylinder 1 for heat exchange and then condensation. The uncondensed liquid is collected by a water collecting tank 231 connected to the water collecting pipe 23. The ice-making cylinder 1 is provided with an auxiliary cold pipe 102, which is connected to the condensing pipe 101. The inner wall of the ice making cylinder 1 is cooled by contact. The condenser 101 is connected to the brine water pipe 201. When the ice making cylinder 1 is making ice, the auxiliary cooling pipe 102 is connected to the brine water pipe 201. Concentrated brine is added into the auxiliary cooling pipe 102 through the brine water pipe 201 and then diluted to perform auxiliary cooling. This is because when the concentrated brine is diluted, the increase in water molecules causes the distance between salt molecules to increase. This process requires the absorption of heat to overcome the interaction force between molecules. Part of the heat is absorbed through this endothermic process, so that the temperature of the inner wall of the ice making cylinder 1 is reduced.

[0037] See also Figure 5 The condenser 101 is arranged inside the auxiliary cold pipe 102, and both the condenser 101 and the auxiliary cold pipe 102 are in contact with the inner wall of the ice-making cylinder 1, the auxiliary cold pipe 102 is connected with the brine water pipe 201, and the condenser 101 passes through the auxiliary cold pipe 102 and is connected to each other for communication, and the condenser 101 is wrapped by the auxiliary cold pipe 102, which effectively reduces the cold air loss on the non-contact surface between the condenser 101 and the inner wall of the ice-making cylinder 1, and because the salt content of the liquid inside the auxiliary cold pipe 102 is relatively high, its condensation point is greatly reduced. While having the same temperature as the condenser 101, it will not freeze itself, thereby increasing the condensation area on the inner wall of the ice-making cylinder 1, and at the same time, concentrated brine is continuously added to the auxiliary cold pipe 102 for dilution to perform an endothermic reaction, and by using fewer condensers 101, a larger refrigeration area and higher refrigeration efficiency can be obtained, thereby greatly improving the ice-making efficiency.

[0038] A brine collecting tank 203 is provided below the inner wall of the ice making cylinder 1, and the brine collecting tank 203 is connected to the brine collecting pipe 202. The brine collected in the brine collecting tank 203 can be transported to the brine water delivery pipe 201 through the brine collecting pipe 202. During the condensation process of seawater, when the seawater temperature drops below the freezing point, the water molecules in the seawater will begin to crystallize to form ice crystals. In this process, the salt in the seawater cannot participate in the crystallization process, so it will be excluded from the ice crystals to form uncondensed seawater with higher salinity. When ice crystals are formed, they will repel the surrounding water molecules, causing the water molecules to form a layer of uncondensed liquid around the ice crystals. This layer of liquid contains a higher salt content, because the salt cannot enter the ice crystals. When the seawater temperature continues to drop, more water molecules will crystallize to form ice crystals, and the salt concentration in the uncondensed liquid will become higher and higher. This part of the high-salt concentration liquid will flow down from the wall of the ice making cylinder 1 and enter the brine collecting tank 203. After being collected in the water tank 203, the brine is added to the auxiliary cooling pipe 102 from the brine water pipe 201. The whole process does not require additional concentrated brine. The concentrated brine precipitated when the seawater freezes is used to collect and reuse it, which improves the resource utilization rate. At the same time, the seawater with high salt concentration is collected to avoid it dripping on the metal equipment or deck on the ship. The seawater contains a high concentration of salt, especially chloride ions, which makes most metal structures have high corrosion activity in seawater. Chloride ions can react with the oxide film on the metal surface, destroying its protective effect, and then accelerating the corrosion process of the metal. Secondly, the electrical conductivity of seawater is very high, which makes it an ideal electrolyte that can accelerate the electrochemical corrosion process of the metal. In electrochemical corrosion, the metal is oxidized as the anode, and the dissolved oxygen in the seawater accepts electrons as the cathode to form a corrosion current, causing the metal to gradually dissolve. Its collection protects metal equipment that has not been treated with anti-corrosion from corrosion. Example

[0039] See also Figure 1 and Figure 6-Figure 8The invention discloses a high-efficiency seawater ice-making device, comprising an ice-making cylinder 1, a rotating shaft 2, a scraper 21, a spray pipe 22 and a water collecting pipe 23. The rotating shaft 2 is arranged at the axis of the ice-making cylinder 1 to drive the scraper 21 and the spray pipe 22 to rotate. A gap is arranged in the ice-making cylinder 1, and a condensing pipe 101 containing a refrigerant is arranged in the gap. The spray pipe 22 is connected to a water storage tank to spray the liquid in the water tank onto the inner wall of the ice-making cylinder 1 for heat exchange and then condensation. The uncondensed liquid is collected by a water collecting tank 231 connected to the water collecting pipe 23. The ice-making cylinder 1 is provided with an auxiliary cold pipe 102, which is connected to the condensing pipe 101. The inner wall of the ice making cylinder 1 is cooled by contact. The condenser 101 is connected to the brine water pipe 201. When the ice making cylinder 1 is making ice, the auxiliary cooling pipe 102 is connected to the brine water pipe 201. Concentrated brine is added into the auxiliary cooling pipe 102 through the brine water pipe 201 and then diluted to perform auxiliary cooling. This is because when the concentrated brine is diluted, the increase in water molecules causes the distance between salt molecules to increase. This process requires the absorption of heat to overcome the interaction force between molecules. Part of the heat is absorbed through this endothermic process, so that the temperature of the inner wall of the ice making cylinder 1 is reduced.

[0040] See also Figure 5 The condenser 101 is arranged inside the auxiliary cold pipe 102, and both the condenser 101 and the auxiliary cold pipe 102 are in contact with the inner wall of the ice-making cylinder 1, the auxiliary cold pipe 102 is connected with the brine water pipe 201, and the condenser 101 passes through the auxiliary cold pipe 102 and is connected to each other for communication, and the condenser 101 is wrapped by the auxiliary cold pipe 102, which effectively reduces the cold air loss on the non-contact surface between the condenser 101 and the inner wall of the ice-making cylinder 1, and because the salt content of the liquid inside the auxiliary cold pipe 102 is relatively high, its condensation point is greatly reduced. While having the same temperature as the condenser 101, it will not freeze itself, thereby increasing the condensation area on the inner wall of the ice-making cylinder 1, and at the same time, concentrated brine is continuously added to the auxiliary cold pipe 102 for dilution to perform an endothermic reaction, and by using fewer condensers 101, a larger refrigeration area and higher refrigeration efficiency can be obtained, thereby greatly improving the ice-making efficiency.

[0041] A reverse osmosis membrane is arranged in the pipe connecting the water storage tank and the spray pipe 22, and a high-concentration pipe 204 is arranged on the high-pressure side of the reverse osmosis membrane, the high-concentration pipe 204 is connected to the salt water delivery pipe 201, and the pipe on the other side of the reverse osmosis membrane is a low-concentration pipe 205 connected to the spray pipe 22. The reverse osmosis membrane is a semi-permeable membrane made of a polymer material, which is manufactured by a special process and only allows water molecules to pass through, while preventing salt and other impurities from passing through. When seawater passes through the reverse osmosis membrane, water molecules can pass through the membrane layer, while salt and other dissolved substances are retained on one side of the membrane, thereby achieving the desalination of seawater. The desalinated seawater enters the spray pipe 22, and the desalinated seawater is sprayed onto the inner wall of the ice making cylinder 1 through the spray pipe 22. Because the internal salt content is greatly reduced after the seawater is desalinated, it is more convenient to use. It is easy to condense, thereby increasing the ice-making efficiency of the ice-making device. The salt that has not passed through the reverse osmosis membrane is under pressure and is carried into the high-concentration pipe 204 along with part of the seawater. The diameter of the high-concentration pipe 204 is small, so that most of the seawater passes through the reverse osmosis membrane and enters the low-concentration pipe 205. A small part of the seawater carries the salt that has not passed through and enters the high-concentration pipe 204, which increases the salt concentration of the seawater. The seawater with a high salt concentration is introduced into the brine water delivery pipe 201, and the seawater with a high salt concentration is introduced into the auxiliary cooling pipe 102 for dilution, and then heat is absorbed. The seawater can be simply desalinated and divided into two seawaters with different salt contents. At the same time, the setting of the high-concentration pipe 204 can effectively avoid the rupture of the reverse osmosis membrane due to excessive pressure when the seawater is pressed through the reverse osmosis membrane.

[0042] The reverse osmosis membrane is made of a polyamide membrane, which has a high flux characteristic, which means that it can process more seawater in the same time, thereby improving the desalination efficiency. The polyamide membrane has a high interception rate for salt, impurities and other pollutants in seawater, and can effectively remove salt from seawater, thereby achieving rapid desalination of seawater. The polyamide membrane has good stability to chemical substances in seawater, can resist chemical corrosion, and ensure the effect of long-term use.

[0043] The scraper 21 is provided with a spiral pattern on the outside. The scraper design with the spiral pattern makes the ice scraping process more continuous and uniform. When the scraper 21 rotates, the spiral pattern can effectively scrape the ice layer from the surface of the evaporator, and this continuous scraping action can prevent the excessive accumulation of ice layer in a local position, thereby ensuring the uniformity and consistency of the ice. The spiral pattern helps to improve the ice scraping efficiency of the scraper 21. Due to the special design of the spiral pattern, the scraper 21 can generate a greater scraping force during the rotation process, making it easier to scrape the ice layer, which can not only reduce the time and energy required for scraping ice, but also improve the overall efficiency of the ice maker. The spiral pattern can also help reduce the damage of the scraper 21 to the evaporator surface. Compared with scrapers 21 of other shapes, the scraper 21 with spiral pattern can better adapt to the curvature change of the evaporator surface during the ice scraping process, reduce friction and impact during the scraping process, and thus extend the service life of the evaporator. The scraper 21 with spiral pattern can also help prevent ice blockage and accumulation. During the ice scraping process, the spiral pattern can effectively push the scraped ice flakes to the ice drop port to prevent them from being blocked and accumulated on the scraper 21 or the evaporator surface. This can not only maintain the normal operation of the ice maker, but also reduce the frequency of maintenance and cleaning.

[0044] Working principle: The seawater ice making machine used in fishing boats is usually a flake ice machine. A water pump is used to pump seawater into a circulating water storage tank. The seawater in the water storage tank is kept in a relatively low temperature range, usually 0~2℃. This temperature range helps the seawater to condense into ice more effectively in the subsequent ice making process. The seawater in the water tank is sprayed onto the inner wall of the ice making cylinder 1 through the spray pipe 22. The ice making cylinder 1 is provided with a condensing pipe 101 containing a refrigerant, so that the seawater and the refrigerant can exchange heat, so that the temperature of the seawater is rapidly reduced. As the temperature increases, the seawater will be cooled and the ice will be cooled. As the temperature drops, seawater begins to condense into an ice layer on the inner wall surface of the ice making cylinder 1. When the ice layer condenses to a certain thickness, the scraper 21 is used to rotate around the rotating shaft 2 to scrape off the ice layer. A reverse osmosis membrane is arranged in the pipeline connecting the water storage tank and the spray pipe 22, and a high-concentration pipe 204 is arranged on the high-pressure side of the reverse osmosis membrane. The high-concentration pipe 204 is connected to the brine water delivery pipe 201, and the pipeline on the other side of the reverse osmosis membrane is a low-concentration pipe 205 connected to the spray pipe 22. The diameter of the high-concentration pipe 204 is small, so that most of the The seawater passes through the reverse osmosis membrane and enters the low-concentration pipe 205, and a small part of the seawater carries the salt that has not passed through and enters the high-concentration pipe 204, thereby increasing the salt concentration of the seawater. The seawater with a high salt concentration is passed into the salt water delivery pipe 201, and is added to the auxiliary cold pipe 102 from the salt water delivery pipe 201. The auxiliary cold pipe 102 contains a certain amount of low-concentration salt water, and the added concentrated salt water will be diluted to a certain extent. The dilution process of the concentrated salt water is an endothermic process. This is because when the concentrated salt water is diluted, the increase in water molecules causes the distance between salt molecules to increase. This process requires the absorption of heat to overcome the interaction force between molecules. Part of the heat is absorbed through this endothermic process, so that the temperature of the inner wall of the ice-making cylinder 1 is reduced. At the same time, the auxiliary cold pipe 102 has a high salt content, which can also effectively avoid low-temperature freezing, and can cool the inner wall of the ice-making cylinder 1 together with the condenser 101. When using a small number of condensers 101, the refrigeration area can be effectively increased, which greatly improves the refrigeration efficiency.

[0045] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0046] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-efficiency seawater ice-making device, comprising an ice-making cylinder (1), a rotating shaft (2), a scraper (21), a spray pipe (22) and a water collecting pipe (23), wherein the rotating shaft (2) is arranged at the axis of the ice-making cylinder (1) to drive the scraper (21) and the spray pipe (22) to rotate, a gap is arranged in the ice-making cylinder (1), a condensing pipe (101) containing a refrigerant is arranged in the gap, the spray pipe (22) is connected to a water storage tank, and liquid in the water tank is sprayed onto the inner wall of the ice-making cylinder (1) for heat exchange and condensation, and uncondensed liquid is collected by a water collecting tank (231) connected to the water collecting pipe (23), and the device is characterized in that: The ice-making cylinder (1) is provided with an auxiliary cooling pipe (102) which cools the inner wall of the ice-making cylinder (1) through contact with the condensing pipe (101). The auxiliary cooling pipe (102) is connected to a salt water delivery pipe (201). When the ice-making cylinder (1) is making ice, concentrated salt water is added to the auxiliary cooling pipe (102) through the salt water delivery pipe (201) for dilution to perform auxiliary cooling. A salt water collection tank (203) is provided below the inner wall of the ice-making cylinder (1). The salt water collection tank (203) The water tank is connected to a salt water collecting pipe (202), and salt water collected in a salt water collecting tank (203) can be transported to a salt water delivery pipe (201) through the salt water collecting pipe (202). A reverse osmosis membrane is provided in a pipe connecting the water storage tank and the spray pipe (22), and a high-concentration pipe (204) is provided on the high-pressure side of the reverse osmosis membrane. The high-concentration pipe (204) is connected to the salt water delivery pipe (201), and the pipe on the other side of the reverse osmosis membrane is a low-concentration pipe (205) connected to the spray pipe (22).

2. The high-efficiency seawater ice-making device according to claim 1, characterized in that: The condensing tubes (101) and the auxiliary cooling tubes (102) are arranged in a staggered manner and in a circular array in the ice making cylinder (1).

3. The high-efficiency seawater ice-making device according to claim 1, characterized in that: The condenser tube (101) is arranged inside the auxiliary cooling tube (102), and both the condenser tube (101) and the auxiliary cooling tube (102) are in contact with the inner wall of the ice-making cylinder (1), the auxiliary cooling tube (102) is connected to the brine water delivery tube (201), and the condenser tube (101) passes through the auxiliary cooling tube (102) and is connected to each other for communication.

4. The high-efficiency seawater ice-making device according to claim 1, characterized in that: The reverse osmosis membrane is made of polyamide membrane.

5. The high-efficiency seawater ice-making device according to any one of claims 1 to 4, characterized in that: The scraper (21) has spiral patterns on its outer side.

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