Special heat exchange disc for ice slurry and heat exchange disc group

Abstract

The application provides a heat exchange disc special for ice slurry and a heat exchange disc group, and belongs to the technical field of ice slurry preparation devices. The heat exchange disc special for ice slurry comprises a disc body and a disc cover, the disc cover is attached to and covers the side wall of the disc body provided with a flow channel and is welded with each other. The disc body is provided with a refrigerant inlet and a refrigerant outlet. Compared with a three-layer structure, the total length of the contact line of the heat exchange disc with a two-layer structure of the disc body and the disc cover at the welded edge is smaller, the heat exchange disc is less likely to leak, and the structure is simple and convenient for production. By arranging a hardening layer on the surface, the wear resistance is effectively improved, and long-term friction of the rotating scraper can be tolerated. The heat exchange disc group comprises a power device, a power shaft, a rotating scraper and the heat exchange disc special for ice slurry. The rotating scraper and the heat exchange disc special for ice slurry are sequentially and alternately arranged, and the rotating scraper simultaneously scrapes off the frost condensed on the two side surfaces of the heat exchange disc special for ice slurry. The heat exchange disc group can select different numbers of the heat exchange disc special for ice slurry according to the preparation scale, and is more flexible to use.

Description

Technical Field

[0001] This application belongs to the technical field of ice slurry preparation equipment, and more specifically, relates to a heat exchange plate and heat exchange plate assembly for ice slurry making. Background Technology

[0002] Ice slurry is a solid-liquid two-phase fluid containing tiny ice crystals. It has good fluidity and high latent heat of phase change, and has broad application prospects in fields such as cold storage air conditioning, food preservation, and industrial cooling. The core equipment for ice slurry production is the ice maker, and the heat exchange plate, as a key component in the ice maker to achieve solution phase change ice making, directly affects the ice-making efficiency and the reliability of equipment operation through its structural design.

[0003] In the prior art, Chinese utility model patent CN223179163U discloses a sandwich panel structure for a smoothie machine, which includes two spaced-apart side plates, with a ring plate assembly installed between the two side plates, thus forming a receiving cavity between the ring plate assembly and the two side plates. Simultaneously, to increase the refrigerant's travel within the sandwich panel, a first baffle and a second baffle are provided internally. However, the sandwich panel in this design is constructed using a three-layer stacked structure. Since the edges where adjacent layers meet are prone to leakage, the longer the edge connection, the higher the probability of internal refrigerant leakage. Furthermore, in the three-layer structure, both sides of the ring plate assembly are connected to the side plates, making leakage even more likely. The three-layer structure and the design of the first and second baffles result in a large number of components, complex internal flow channel processing, and inconvenient manufacturing.

[0004] Meanwhile, Chinese utility model patent CN223925179U discloses an ice slurry machine. The ice slurry machine has two independent heat exchange discs. Water is sprayed onto the surface of the heat exchange device through a nozzle-equipped spray pipe between the discs. A drive shaft rotates a scraper, scraping off the condensed ice on the heat exchange device, which falls to the bottom of the casing and is then discharged from the outlet. However, because the scraper and nozzle are located on opposite sides of the heat exchange discs, the scraper cannot directly scrape off the frost condensed on the side of the heat exchange disc facing the nozzle. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this application provides a dedicated heat exchange plate and heat exchange plate assembly for ice-making slurry, which can reduce the risk of leakage from the heat exchange plate, and has a simple structure that is easy to manufacture. Furthermore, the rotating scraper can simultaneously remove frost from both sides of the dedicated heat exchange plate for ice-making slurry.

[0006] To achieve the above objectives, the technical solution of this application provides a heat exchange plate for ice making slurry, including a plate body and a plate cover. A flow channel is recessed on one side of the plate body. The plate cover fits and covers the side wall of the plate body where the flow channel is opened and seals the flow channel. A shaft hole is opened through the center of the plate body and the plate cover. The outer edge of the plate cover is welded and sealed to the plate body. The inner edge of the plate cover located in the shaft hole is welded and sealed to the edge of the plate body located in the shaft hole. The plate body has a refrigerant inlet and a refrigerant outlet that are respectively connected to both ends of the flow channel.

[0007] Optionally, one side of the disc body has a groove that matches the size of the disc cover, the flow channel is located on the bottom wall of the groove, and the disc cover is placed into the groove and welded to the edge of the groove.

[0008] Optionally, the flow channel includes a left flow channel and a right flow channel symmetrically arranged on the left and right sides. Both the left and right flow channels adopt a shape of continuous serpentine bends and concentric semi-circular arcs. The shaft hole is located at the center of the left and right flow channels. The inner ends of the left and right flow channels are connected to each other, and the refrigerant inlet and refrigerant outlet are connected to the outer ends of the left and right flow channels, respectively.

[0009] Optionally, the surface of the disc body away from the side wall where the flow channel is provided, and the surface of the disc cover away from the side wall where the flow channel is provided, both have a hardened layer.

[0010] Optionally, both the disc body and the disc cover are made of copper metal, and the hardening layer is made of carburized layer, nitrided layer, hard chrome plating layer or physical vapor deposition coating.

[0011] Optionally, both the disc body and the disc cover are made of aluminum metal, and the hardened layer is a dense aluminum oxide hardened layer formed on the surface of the aluminum material by anodizing.

[0012] A heat exchange plate assembly includes a power unit, a power shaft, several rotating scrapers, and several heat exchange plates specifically for ice-making slurry. The rotating scrapers and the heat exchange plates for ice-making slurry are arranged alternately in sequence. One end of the power shaft is connected to the output end of the power unit. The power shaft passes through the shaft holes of all the heat exchange plates for ice-making slurry and can rotate in the shaft holes. The rotating scrapers are fixedly connected to the power shaft and abut against the side walls of the plate body and the side walls of the plate cover of the adjacent heat exchange plates for ice-making slurry.

[0013] Optionally, the ice-making slurry heat exchange plate is divided into several groups, each group of ice-making slurry heat exchange plates includes a connecting pipe and at least two ice-making slurry heat exchange plates connected in series; in each group of ice-making slurry heat exchange plates, the refrigerant outlet of the ice-making slurry heat exchange plate is connected to the refrigerant inlet of the next adjacent ice-making slurry heat exchange plate through the connecting pipe.

[0014] Optionally, a bottom step is distributed around the edge of one of the side walls of the disc body, and each bottom step has a top step at its top, the size of which is smaller than that of the bottom step; the other side wall of the disc body has a mating slot coaxially arranged with the top step, the mating slot having the same size as the top step, and the top step of the disc body is inserted and positioned with the mating slot of the adjacent disc body.

[0015] Optionally, it also includes a support frame, a mounting plate, and a bearing end cap with bearings. The power equipment is fixedly connected to the support frame. The support frame has several bottom steps II, and each bottom step II has a top step II at its top. The size of the top step II is smaller than that of the bottom step II. The top step II is inserted and positioned into a docking slot located on the end ice-making slurry heat exchange plate. The mounting plate has holes distributed on it. The top step I located on the other end ice-making slurry heat exchange plate is inserted and positioned into the corresponding holes. The end of the power shaft away from the power equipment passes through the mounting plate and is connected to the mounting plate through the bearing end cap.

[0016] The advantages of the technical solution in this application compared to the prior art are as follows:

[0017] The heat exchange plate for ice slurry is made of two layers, a plate body and a plate cover, welded together. Compared to a three-layer structure, the total contact line length at the welded edges of the plate body and plate cover is shorter, making it less prone to leakage. At the same time, the two-layer welded structure has fewer components, and the internal flow channels can be machined by milling, which facilitates production.

[0018] By setting a hardened layer on both surfaces of the heat exchange plate for ice slurry, the wear resistance of the plate surface is effectively improved, which can withstand long-term friction from the rotating scraper and significantly extend the service life of the heat exchange plate.

[0019] The left and right flow channels are symmetrically arranged, and both the left and right flow channels adopt a continuous serpentine bend with a concentric semi-circular arc shape. While extending the refrigerant travel, it ensures the uniformity of the plate surface temperature as much as possible, which is conducive to the uniform formation of ice crystals.

[0020] The heat exchanger assembly consists of a power unit, a power shaft, several rotating scrapers, and multiple dedicated heat exchangers for ice-making slurry. Because the rotating scrapers and dedicated heat exchangers for ice-making slurry are arranged alternately, the rotating scrapers, driven by the power unit and power shaft, can simultaneously scrape away the frost that has condensed on both sides of the dedicated heat exchangers for ice-making slurry. Furthermore, the number of dedicated heat exchangers for ice-making slurry can be selected according to the scale of production, making its use more flexible. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 Schematic diagram of the overall structure of the heat exchange plate for ice making slurry;

[0023] Figure 2 This is a front view of the disk structure;

[0024] Figure 3 This is a schematic diagram of the disk structure;

[0025] Figure 4 Schematic diagram of a series heat exchange plate structure for ice making slurry;

[0026] Figure 5 A front view of a heat exchanger assembly with a dedicated heat exchanger for ice-making slurry connected in series and without a power source.

[0027] Figure 6 Schematic diagram of a series heat exchange plate structure for ice making slurry;

[0028] Figure 7 Schematic diagram of the docking structure of the heat exchange plate for ice making slurry;

[0029] Figure 8 This is a schematic diagram of the support frame and mounting plate installation structure.

[0030] Icons: 10. Ice slurry heat exchange plate; 1. Plate body; 11. Flow channel; 12. Shaft hole; 13. Refrigerant inlet; 14. Refrigerant outlet; 15. Groove; 16. Left flow channel; 17. Right flow channel; 18. Bottom step one; 19. Top step one; 20. Connecting slot; 2. Plate cover; 3. Power equipment; 4. Power shaft; 5. Rotating scraper; 51. Blade plate; 6. Connecting pipe; 7. Support frame; 71. Bottom step two; 72. Top step two; 8. Mounting plate; 81. Insertion hole; 9. Bearing end cover. Detailed Implementation

[0031] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0032] Example 1:

[0033] This embodiment provides a heat exchange plate specifically for ice slurry making, based on... Figures 1 to 3 As shown, the device includes a disc body 1 and a disc cover 2. A flow channel 11 is recessed on one side of the disc body 1. The disc cover 2 fits and covers the side wall of the disc body 1 where the flow channel 11 is located, sealing the flow channel 11. A shaft hole 12 is formed through the center of the disc body 1 and the disc cover 2. The outer edge of the disc cover 2 is welded and sealed to the disc body 1, and the inner edge of the disc cover 2 located at the shaft hole 12 is welded and sealed to the edge of the disc body 1 located at the shaft hole 12. The disc body 1 has a refrigerant inlet 13 and a refrigerant outlet 14, which are respectively connected to the two ends of the flow channel 11. The refrigerant inlet 13 and refrigerant outlet 14 are only distinguished by their names and can be interchanged in actual use. In use, a refrigerant with a freezing point lower than that of the external liquid, such as an aqueous solution of ethylene glycol, enters the flow channel 11 through the refrigerant inlet 13 and then flows out through the refrigerant outlet 14. The outer surface temperature of the heat exchange plate 10 for ice slurry decreases, and the external liquid flowing over the outer surface of the heat exchange plate 10 releases heat, forming ice crystals that adhere to the outer surface of the heat exchange plate 10. The shaft hole 12 is used to pass through the power shaft 4, which is equipped with a rotating scraper 5 that abuts against the outer surface of the plate cover 2 and the side wall of the plate body 1 facing away from the plate cover 2. By driving the rotating scraper 5 to rotate, the power shaft 4 can scrape away the ice crystals from the outer surface of the heat exchange plate 10, allowing the ice crystals to enter the external liquid and form ice slurry.

[0034] In this embodiment, the disk body 1 and disk cover 2 are preferably made of a metal disk body 1 with good thermal conductivity, such as copper or aluminum. Copper has stronger thermal conductivity, while aluminum has the advantages of low cost and light weight. The disk body 1 has a certain thickness, preferably 30 mm to 50 mm, to ensure sufficient strength and to allow for the machining of flow channels 11 with a certain depth. The flow channels 11 are machined by CNC milling. The surface roughness Ra of the flow channels 11 is ≤ 3.2 μm to reduce flow resistance. After the disk cover 2 fits and covers the side wall of the disk body 1 where the flow channels 11 are formed, the outer edge of the disk cover 2 is sealed to the disk body 1 by continuous laser welding, and the inner edge of the disk cover 2 located in the shaft hole 12 is sealed to the edge of the disk body 1 located in the shaft hole 12 by continuous laser welding to prevent leakage of the flow channels 11. Because the heat exchange plate 10 for ice making slurry is made of two layers, plate body 1 and plate cover 2, welded together, compared with the three-layer structure in the prior art, the total length of the contact line at the welded edge of plate body 1 and plate cover 2 is smaller, making it less prone to leakage. The two-layer welded structure has fewer components, and the internal flow channel 11 is machined by milling, which facilitates production.

[0035] Preferably, one side of the disc body 1 has a groove 15 that matches the size of the disc cover 2. The flow channel 11 is located on the bottom wall of the groove 15. The disc cover 2 is placed into the groove 15 and welded to the edge of the groove 15. The groove 15 facilitates the positioning between the disc cover 2 and the disc body 1. The thickness of the disc cover 2 is the same as the depth of the groove 15. After the disc cover 2 is placed in the groove 15, the outer surface of the disc cover 2 is flush with the outer surface of the disc body 1, which facilitates welding. The bottom wall of the groove 15 and the surface of the disc cover 2 facing the flow channel 11 must be sufficiently flat to prevent the flow channel 11 from interconnecting.

[0036] In this embodiment, the flow channel 11 includes a left flow channel 16 and a right flow channel 17 symmetrically arranged. Both the left and right flow channels 16 and 17 adopt a continuous serpentine bend with a concentric semi-circular arc shape. The shaft hole 12 is located at the center of the left and right flow channels 16 and 17, respectively. The inner ends of the left and right flow channels 16 and 17 are connected to each other, and the refrigerant inlet 13 and refrigerant outlet 14 are connected to the outer ends of the left and right flow channels 16 and 17, respectively. This flow channel 11 design can make full use of the internal space of the disk body 1. The refrigerant flows in the continuously serpentine bend of the flow channel 11, which extends the heat exchange path. After sufficient heat exchange with the liquid outside the disk body 1, it flows out, improving the heat utilization efficiency and ensuring the uniformity of the surface temperature of the disk body 1 as much as possible, which is conducive to the uniform formation of ice crystals.

[0037] Furthermore, both the sidewall of the disc body 1 away from the sidewall where the flow channel 11 is located, and the sidewall of the disc cover 2 away from the sidewall where the flow channel 11 is located, have a hardened layer. The thickness of the hardened layer is preferably 0.05 mm to 0.5 mm, and the hardness is preferably HV500 or higher. The hardened layer effectively improves the wear resistance of the disc surface, can withstand long-term friction from the rotating scraper 5, and significantly extends the service life of the heat exchange disc. For the disc body 1 and disc cover 2 made of copper, the hardened layer is a carburized layer, a nitrided layer, a hard chrome plating layer, or a physical vapor deposition (PVD) coating. For the disc body 1 and disc cover 2 made of aluminum, the hardened layer is a dense alumina hardened layer formed on the aluminum surface by anodizing.

[0038] Example 2:

[0039] This embodiment provides a heat exchange disk assembly, based on Figure 4As shown, the device includes a power unit 3, a power shaft 4, several rotating scrapers 5, and several ice-making slurry-specific heat exchange plates 10. The "several ice-making slurry-specific heat exchange plates 10" refers to at least one ice-making slurry-specific heat exchange plate 10, and the number of rotating scrapers 5 is one more than the number of ice-making slurry-specific heat exchange plates 10. The rotating scrapers 5 and the ice-making slurry-specific heat exchange plates 10 are arranged alternately in sequence, ensuring that rotating scrapers 5 are provided on both sides of all ice-making slurry-specific heat exchange plates 10. The power unit 3 uses a motor with a reducer. One end of the power shaft 4 is connected to the output end of the power unit 3. The power shaft 4 passes through the shaft holes 12 of all ice-making slurry-specific heat exchange plates 10 and can rotate within the shaft holes 12. The rotating scrapers 5 are fixedly connected to the power shaft 4 and abut against the side walls of the plate body 1 and the plate cover 2 of adjacent ice-making slurry-specific heat exchange plates 10. To facilitate the rotation of the power shaft 4, a bearing is provided between the power shaft 4 and each shaft hole 12.

[0040] In actual use, all rotating scrapers 5 and ice-making slurry heat exchange plates 10 extend from the side into the chamber containing the solution to be condensed, while the power unit 3 is located outside the chamber. Both the rotating scrapers 5 and the ice-making slurry heat exchange plates 10 are submerged in the solution. The refrigerant inlet 13 and refrigerant outlet 14 in the ice-making slurry heat exchange plates 10 are connected to the outside via external pipelines, through which refrigerant is supplied to the ice-making slurry heat exchange plates 10. In this way, the solution in the chamber continuously condenses into ice crystals on the surface of the ice-making slurry heat exchange plates 10. The power unit 3 drives the rotating shaft to rotate, and the rotating scrapers 5 follow the rotation of the power shaft 4, scraping away the ice crystals condensed on the surfaces of adjacent ice-making slurry heat exchange plates 10 and allowing them to enter the solution to form ice slurry.

[0041] In this embodiment, the rotating scraper 5 includes two blades 51 that are centered on the power shaft 4 and spaced 180 degrees apart from each other. The two blades 51 simultaneously abut against the surfaces of the ice-making slurry-specific heat exchange plates 10 on both sides to ensure that the power shaft 4 is subjected to uniform force during rotation.

[0042] Furthermore, the multiple ice-making slurry-specific heat exchange plates 10 are divided into several groups, and each group of ice-making slurry-specific heat exchange plates 10 includes a connecting pipe 6 and at least two ice-making slurry-specific heat exchange plates 10 connected in series. Here, "several groups" refers to at least one group. In this embodiment, based on... Figure 5 As shown, the heat exchanger assembly comprises 21 dedicated heat exchangers 10 for ice slurry and 22 rotating scrapers 5. The 21 dedicated heat exchangers 10 are divided into seven groups, each group containing two connecting pipes 6 and three dedicated heat exchangers 10 connected in series. In actual design, the total number of dedicated heat exchangers 10, the number of groups, and the number of dedicated heat exchangers 10 in each group can be adjusted according to different specifications. Within each group of dedicated heat exchangers 10, based on… Figure 6As shown, the refrigerant outlet 14 of the ice-making slurry heat exchange plate 10 is connected to the refrigerant inlet 13 of the next adjacent ice-making slurry heat exchange plate 10 via a connecting pipe 6. Thus, when the refrigerant enters the flow channel 11 from the refrigerant inlet 13 of the leftmost ice-making slurry heat exchange plate 10 through an external pipe, it will continuously flow through the flow channels 11 of all three ice-making slurry heat exchange plates 10 before exiting. Since the total length of the internal flow channels 11 of a single ice-making slurry heat exchange plate 10 is limited, the refrigerant flow path can be extended many times over by connecting them in series, ensuring sufficient travel and time for heat exchange, thereby improving heat utilization efficiency.

[0043] Furthermore, based on Figure 6 and Figure 7 As shown, bottom steps 18 are distributed along the edge of one side wall of the plate body 1, and each bottom step 18 has a top step 19 at its top. The size of the top step 19 is smaller than that of the bottom step 18. A docking slot 20 is distributed on the other side wall of the plate body 1, coaxially arranged with the top step 19. The docking slot 20 has the same size as the top step 19, and the top step 19 of the plate body 1 is inserted into the docking slot 20 of the adjacent plate body 1 for positioning. This allows for the positioning of adjacent ice-making slurry heat exchange plates 10, facilitating assembly. In this embodiment, the plate body 1 is square, with bottom steps 18, top steps 19, and docking slots 20 at its four corners. The height of the bottom step 18 is the same as or slightly larger than the height of the rotating scraper 5, ensuring that after the two ice-making slurry heat exchange plates 10 are positioned and inserted, the rotating scraper 5 will not be tightly pressed down, and its rotation will not be hindered.

[0044] Furthermore, based on Figure 4 , Figure 5 and Figure 8As shown, the system also includes a support frame 7, a mounting plate 8, and a bearing end cap 9 with bearings. The power unit 3 is fixedly connected to the support frame 7. The support frame 7 has several bottom steps 71, and each bottom step 71 has a top step 72 at its top. The size of the top step 72 is smaller than that of the bottom step 71. The number of bottom steps 71 is the same as the number of docking slots 20 on the plate body 1, and their positions are opposite. The top step 72 is inserted into and positioned with the docking slots 20 located on the end ice-making slurry heat exchange plate 10. The power unit 3 and the ice-making slurry heat exchange plate 10 are located on opposite sides of the support frame 7. The power shaft 4 passes through the support frame 7 and then through the shaft holes 12 on all the ice-making slurry heat exchange plates 10. Meanwhile, the mounting plate 8 has insertion holes 81 distributed on it. The number of insertion holes 81 is the same as the number of top steps 19 on the plate body 1, and their positions are opposite. The top step 19 on the ice-making slurry heat exchange plate 10 at the other end is inserted and positioned into the corresponding insertion hole 81. The end of the power shaft 4 away from the power device 3 passes through the mounting plate 8 and is connected to the mounting plate 8 through the bearing end cover 9. At this time, the bearing end cover 9 realizes axial limitation between the power shaft 4 and the ice-making slurry heat exchange plate 10.

[0045] The heat exchange plate group in this embodiment has a flexible layout and is easy to expand. It is convenient to adjust the heat exchange area according to the capacity of the ice maker to meet different scale ice making needs.

[0046] Example 3:

[0047] This embodiment provides a heat exchange disk assembly, based on Figure 4 As shown, the assembly includes a power unit 3, a power shaft 4, several rotating scrapers 5, and several of the aforementioned ice-making slurry-specific heat exchange plates 10. The difference between this embodiment and Embodiment 2 is that the multiple ice-making slurry-specific heat exchange plates 10 are independent of each other and not connected in series. In actual use, the refrigerant inlet 13 and refrigerant outlet 14 of each ice-making slurry-specific heat exchange plate 10 are connected to the outside via external pipelines, and refrigerant is supplied to the ice-making slurry-specific heat exchange plate 10 through these external pipelines.

[0048] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A heat exchange plate specifically for ice-making slurry, characterized in that: The device includes a disc body and a disc cover. A flow channel is recessed on one side of the disc body. The disc cover fits and covers the side wall of the disc body where the flow channel is located and seals the flow channel. A shaft hole is formed through the center of the disc body and the disc cover. The outer edge of the disc cover is welded and sealed to the disc body. The inner edge of the disc cover located in the shaft hole is welded and sealed to the edge of the disc body located in the shaft hole. The disc body has a refrigerant inlet and a refrigerant outlet that are respectively connected to both ends of the flow channel.

2. The heat exchange plate for ice-making slurry as described in claim 1, characterized in that: The disc body has a groove on one side that matches the size of the disc cover. The flow channel is located on the bottom wall of the groove. The disc cover is inserted into the groove and welded to the edge of the groove.

3. The heat exchange plate for ice-making slurry as described in claim 1, characterized in that: The flow channel includes a left flow channel and a right flow channel symmetrically arranged. Both the left and right flow channels adopt a shape of continuous serpentine bends and concentric semi-circular arcs. The shaft hole is located at the center of the left and right flow channels. The inner ends of the left and right flow channels are connected to each other. The refrigerant inlet and the refrigerant outlet are respectively connected to the outer ends of the left and right flow channels.

4. The heat exchange plate for ice-making slurry as described in claim 1, 2, or 3, characterized in that: The surface of the disc body away from the side wall where the flow channel is located, and the surface of the disc cover away from the side wall where the flow channel is located, both have a hardened layer.

5. The heat exchange plate for ice-making slurry as described in claim 4, characterized in that: Both the disc body and the disc cover are made of copper metal, and the hardening layer is a carburized layer, a nitrided layer, a hard chromium plating layer, or a physical vapor deposition coating.

6. The heat exchange plate for ice-making slurry as described in claim 4, characterized in that: Both the disc body and the disc cover are made of aluminum metal, and the hardened layer is a dense aluminum oxide hardened layer formed on the surface of the aluminum material by anodizing.

7. A heat exchange disk assembly, characterized in that: The device includes a power unit, a power shaft, several rotating scrapers, and several heat exchange plates for ice-making slurry as described in any one of claims 1-6. The rotating scrapers and the heat exchange plates for ice-making slurry are arranged alternately in sequence. One end of the power shaft is connected to the output end of the power unit. The power shaft passes through the shaft holes of all the heat exchange plates for ice-making slurry and is able to rotate in the shaft holes. The rotating scrapers are fixedly connected to the power shaft and abut against the side walls of the plate body and the side walls of the plate cover of the adjacent heat exchange plates for ice-making slurry.

8. The heat exchange disk assembly as described in claim 7, characterized in that: The ice-making slurry heat exchange plate is divided into several groups. Each group of ice-making slurry heat exchange plates includes a connecting pipe and at least two ice-making slurry heat exchange plates connected in series. In each group of ice-making slurry heat exchange plates, the refrigerant outlet of the ice-making slurry heat exchange plate is connected to the refrigerant inlet of the next adjacent ice-making slurry heat exchange plate through the connecting pipe.

9. The heat exchange disk assembly as described in claim 7 or 8, characterized in that: A bottom step is distributed around the edge of one of the side walls of the disc body, and each bottom step has a top step at the top, the size of which is smaller than that of the bottom step. A docking slot is distributed on the other side wall of the disc body, which is coaxially arranged with the top step. The docking slot is the same size as the top step, and the top step of the disc body is inserted and positioned with the docking slot of the adjacent disc body.

10. The heat exchange disk assembly as described in claim 9, characterized in that: It also includes a support frame, a mounting plate, and a bearing end cap with a bearing, wherein the power equipment is fixedly connected to the support frame; The support frame has several bottom steps, and each bottom step has a top step at its top. The size of the top step is smaller than that of the bottom step. The top step is inserted into and positioned with the docking slot located on the ice-making slurry heat exchange plate at the end. The mounting plate has holes distributed on it. The top step on the ice-making slurry heat exchange plate at the other end is inserted and positioned into the corresponding hole. The end of the power shaft away from the power equipment passes through the mounting plate and is connected to the mounting plate through the bearing end cover.

Images