An ice making mechanism of an ice maker

Abstract

This utility model relates to the field of ice maker technology, and more particularly to an ice-making mechanism for an ice maker, including an ice-making cylinder. The ice-making cylinder includes an outer cylinder and an inner cylinder coaxially disposed inside the outer cylinder. Both the front and rear ends of the inner cylinder have flared portions that expand outwards. The outer edges of the flared portions at both ends of the inner cylinder are welded and fixed to the inner sidewall of the outer cylinder. The inner sidewall of the outer cylinder, the outer sidewall of the inner cylinder, and the outer sidewalls of the flared portions at the front and rear ends of the inner cylinder together form an axially extending cooling channel. The front end of the outer cylinder is provided with a leak-proof component for sealing it. The leak-proof component includes a sealing cover plate, the outer circumferential side of which is welded and fixed to the inner sidewall of the front end of the outer cylinder. By using the position between the front end face of the sealing cover plate and the inner sidewall of the outer cylinder as the grinding position, compared to grinding existing welded positions, the welding position of this sealing cover plate will not leak after grinding, thus solving the problem of air leakage during grinding.

Description

Technical Field

[0001] This utility model relates to the field of ice maker technology, and in particular to an ice-making mechanism for an ice maker. Background Technology

[0002] Ice makers, widely used in commercial, catering, and household applications, primarily function to freeze water or beverages into ice pellets or slushies using a refrigeration system. The ice-making mechanism, a key component, directly impacts ice-making efficiency, finished product quality, and equipment reliability. During the ice-making process, refrigerant circulates within the refrigeration channels of the ice cylinder, gradually freezing the water or beverage through heat exchange with the outer cylinder wall. The frozen ice layer is then scraped off by a spiral scraper and further broken up and agitated, ultimately forming the desired ice product.

[0003] Currently, common ice-making mechanisms typically employ an outer cylinder and an inner cylinder to form a refrigeration channel. In existing technology, the refrigeration channel is constructed by welding front and rear sealing rings between the outer and inner cylinders; that is, the inner wall of the outer cylinder, the outer wall of the inner cylinder, and the end faces of the front and rear sealing rings together form an annular channel. While this structure can achieve refrigeration, the presence of multiple welded joints results in poor overall structural strength and pressure resistance. Especially during high-pressure refrigerant circulation, weld cracking or leakage is prone to occur, affecting refrigeration efficiency and equipment lifespan.

[0004] Furthermore, existing ice-making mechanisms also have certain defects in the assembly of the sealing cover. In conventional designs, the sealing cover is usually welded to the outer edge of the front end of the outer cylinder to prevent water or beverages from leaking out of the ice-making chamber. This welded structure often requires surface grinding after welding to ensure a smooth appearance or facilitate subsequent assembly. However, the grinding process easily damages the weld, leading to decreased sealing performance and even water or beverage leakage, increasing the rework rate and quality control difficulty during manufacturing. Therefore, this paper provides an ice-making mechanism for an ice maker to solve the above-mentioned technical problems. Utility Model Content

[0005] The purpose of this utility model is to provide an ice-making mechanism for an ice maker that addresses the shortcomings of existing technologies, thereby solving the technical problems of poor high-pressure resistance of the refrigeration channel and easy air leakage at the welded joints of the sealing cover in the processing steps of existing ice-making mechanisms.

[0006] To achieve the above objectives, the technical solution of this utility model is as follows: An ice-making mechanism for an ice maker includes a mounting housing and an ice-making cylinder mounted on the front side of the mounting housing. A drive module is mounted on the rear side of the mounting housing. The output shaft of the drive module passes through the mounting housing and is connected to a rotating shaft, which passes through the interior of the ice-making cylinder. A spiral scraper for scraping off the ice layer on its outer surface is fitted on the outside of the ice-making cylinder. The end of the rotating shaft passes through the ice-making cylinder and is fixed to the spiral scraper. The ice maker includes an outer cylinder and an inner cylinder coaxially disposed inside the outer cylinder. The front and rear ends of the inner cylinder are formed with flared portions that expand outwards. The outer edges of the flared portions at both ends of the inner cylinder are welded and fixed to the inner sidewall of the outer cylinder. The inner sidewall of the outer cylinder, the outer sidewall of the inner cylinder, and the outer sidewalls of the flared portions at the front and rear ends of the inner cylinder together form a refrigeration channel extending along the axial direction. The front end of the outer cylinder is provided with a leak-proof assembly for sealing it; the leak-proof assembly includes a sealing cover plate, the outer circumferential side of which is welded and fixed to the inner side wall of the front end of the outer cylinder.

[0007] Furthermore, the leak-proof assembly also includes a connecting cover body placed in front of the sealing cover plate. A sleeve body is formed at the center of the connecting cover body and fitted onto the outside of the rotating shaft. An oil seal ring and a bearing are arranged front and rear between the rotating shaft and the inner wall of the sleeve body. The oil seal ring is used to fill the gap between the rotating shaft and the inner wall of the sleeve body, and the bearing is used to support the rotating shaft. A sealing ring is provided between the connecting cover body and the sealing cover plate.

[0008] Furthermore, the leak-proof assembly also includes a connecting housing disposed on the rear side of the sealing cover, with the connecting cover and the connecting housing fixedly disposed together.

[0009] Furthermore, a mounting recess is formed in the middle of the side of the sealing cover away from the connecting housing, and the sealing ring is placed in the mounting recess.

[0010] Furthermore, a connecting component is provided between the connecting housing and the connecting cover to fix the two together. Several connecting components are provided and arranged in an array around the center point of the sealing cover.

[0011] Furthermore, the connecting component includes a connecting seat formed inside the connecting housing, and a positioning sleeve formed on the side of the connecting cover near the connecting housing. The positioning sleeve is used to fit over the outside of the connecting seat. The connecting cover is formed with a threaded hole that communicates with the positioning sleeve and is used to accommodate a bolt. The bolt's shank is threadedly connected to the connecting seat, and the bolt's head is placed inside the threaded hole. A sealing plug is inserted into the opening of the threaded hole with an interference fit.

[0012] Furthermore, the refrigeration channel is in the shape of an annular column, and the inner wall of the inner cylinder is provided with a liquid supply connection pipe and a gas supply connection pipe that connect to the refrigeration channel. One end of the liquid supply connection pipe and the gas supply connection pipe extends outward toward the ice-making cylinder. The liquid supply connection pipe and the gas supply connection pipe are arranged vertically, and the diameter of the liquid supply connection pipe is smaller than the diameter of the gas supply connection pipe.

[0013] Furthermore, a baffle is installed inside the refrigeration channel, and the end of the liquid infusion connecting pipe that connects to the refrigeration channel is aligned with the baffle.

[0014] Furthermore, a connecting flange is provided on the outer rear end of the outer cylinder, and the connecting flange is formed with several fixing grooves arranged in an equidistant array along its circumference; the mounting shell is formed with mounting holes for the outer cylinder to pass through, and the inner sidewall of the mounting holes is formed with mounting bosses for fixed connection with the connecting flange.

[0015] Furthermore, a fixing frame is installed on the side of the mounting housing away from the drive module. The fixing frame is provided with a sealing filler for filling the gap between the connecting flange and the mounting boss, as well as the gap between the outer wall of the outer cylinder and the inner wall of the mounting boss.

[0016] The beneficial effects of this utility model are: the inner cylinder and the outer cylinder are coaxially positioned through the tolerance fit of the flared part, ensuring that the radial width of the formed refrigeration channel is uniform.

[0017] Welding not only secures the components but also ensures leak-free connections through weld sealing. The flared ends of the inner cylinder create refrigeration channels, making them more resistant to high pressure. Furthermore, welding at two locations allows the welding device to perform laser welding directly from the outside of the ice-making cylinder, eliminating the need to insert the welding head into the refrigeration channels and improving welding efficiency. Additionally, after welding and airtightness testing, no leakage in the refrigeration channels indicates a successful weld; if leakage is detected, the weld is unsuccessful and requires rework. Repairs can be performed directly from the outside of the ice-making cylinder, increasing the yield rate of the welding process.

[0018] In addition, welding the outer circumferential side of the sealing cover to the inner front wall of the outer cylinder not only achieves a fixed connection between the two, but also ensures that there is no leakage at the connection point through the sealing of the weld. Furthermore, the position between the front face of the sealing cover and the inner wall of the outer cylinder is used as the grinding position. Compared with grinding the welding position of the existing sealing cover, the welding position of this sealing cover will not leak after grinding, thus solving the problem of air leakage during grinding. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0020] Figure 2 This is a structural schematic diagram from another perspective of the present invention.

[0021] Figure 3 This is an exploded view of the present invention.

[0022] Figure 4 This is a schematic diagram of the structure of the ice-making cylinder of this utility model.

[0023] Figure 5 This is a structural schematic diagram of the leak-proof component of this utility model.

[0024] Figure 6 This is an exploded view of the leak-proof component of this utility model.

[0025] Figure 7 This is an exploded view of the leak-proof component of this utility model from another perspective.

[0026] The reference numerals in the figures include: 1. Mounting housing; 11. Mounting hole; 12. Mounting boss; 13. Fixing frame; 14. Sealing filler; 2. Ice maker; 21. Outer cylinder; 22. Inner cylinder; 23. Flared end; 24. Refrigeration passage; 25. Liquid inlet pipe; 26. Gas inlet pipe; 27. Baffle; 28. Connecting flange; 29. ​​Fixing groove; 3. Rotating shaft; 4. Spiral scraper; 5. Drive module; 6. Leak-proof assembly; 61. Sealing cover; 62. Mounting recess; 63. Connecting housing; 64. Connecting cover; 65. Sealing ring; 66. Connecting seat; 67. Positioning sleeve; 68. Bolt; 69. Sealing plug; 610. Sleeve body; 611. Bearing; 612. Oil seal ring; 613. Screw hole; 614. Temperature sensor. Detailed Implementation

[0027] The ice-making mechanism of an ice maker according to this utility model will be described in detail below with reference to the accompanying drawings.

[0028] like Figure 1-3 As shown, an embodiment of the ice-making mechanism of an ice maker according to the present invention includes a mounting housing 1 and an ice-making cylinder 2 installed on the front side of the mounting housing 1. The mounting housing 1 is the rear cover of the ice-making chamber (not shown in the figure). After the mounting housing 1 is installed in the ice-making chamber and its rear is sealed, the ice-making cylinder 2 is placed in the ice-making chamber. Then, water or beverage can be poured into the ice-making chamber and the ice-making cylinder 2 can be immersed in the water or beverage. Refrigerant is injected into the ice-making cylinder 2, and the water or beverage is ice-making process is performed through the ice-making cylinder 2.

[0029] A drive module 5, which is a drive motor, is located on the rear side of the mounting housing 1. A rotating shaft 3 is connected to the output shaft of the drive module 5, which passes through the mounting housing 1. The rotating shaft 3 is inserted inside the ice-making cylinder 2, and its axis is coaxial with the centerline of the ice-making cylinder 2. A spiral scraper 4 is fitted on the outer side of the ice-making cylinder 2 to scrape off the ice layer from its outer surface. The end of the rotating shaft 3 passes through the ice-making cylinder 2 and is fixed to the spiral scraper 4. When an ice layer forms on the outer surface of the ice-making cylinder 2, the drive module 5 is activated, driving the spiral scraper 4 to rotate via the rotating shaft 3. This scrapes off the ice layer from the outer surface of the ice-making cylinder 2 and mixes it with water or beverages. By repeatedly scraping off the ice layer and mixing, the water or beverage can be made into a slushie.

[0030] A leak-proof component 6 is installed at the front end of the ice maker 2 (i.e., the end of the ice maker 2 away from the mounting housing 1). The leak-proof component 6 is used to seal the front end of the ice maker 2, and the rotating shaft 3 is rotatably connected to the leak-proof component 6. By setting the leak-proof component 6, water or beverages inside the ice-making chamber are prevented from leaking out from the gap between the rotating shaft 3 and the inside of the ice maker 2. While achieving a seal, the rotating shaft 3 can still rotate.

[0031] like Figure 3-4 As shown, the ice-making cylinder 2 includes an outer cylinder 21 and an inner cylinder 22 coaxially disposed inside the outer cylinder 21. Both the outer cylinder 21 and the inner cylinder 22 are cylindrical and their axes are arranged transversely. The front end and rear end of the inner cylinder 22 are formed with flared portions 23 that expand outward. The diameter of the flared portion 23 is larger than the diameter of the inner cylinder 22, and the diameter of the flared portion 23 is smaller than the diameter of the outer cylinder 21. A welded gap is formed between the outer circumference of the flared portion 23 and the inner wall of the outer cylinder 21, and the outer edges of the flared portions 23 at both ends of the inner cylinder 22 are welded and fixed to the inner wall of the outer cylinder 21.

[0032] The inner wall of the outer cylinder 21, the outer wall of the inner cylinder 22, and the outer walls of the flared portions 23 at the front and rear ends of the inner cylinder 22 together form an axially extending refrigeration channel 24, which is annular in shape. The inner cylinder 22 and the outer cylinder 21 are coaxially positioned through the tolerance fit of the flared portions 23, ensuring that the radial width of the formed refrigeration channel 24 is uniform. The refrigeration channel 24 is used for the flow of refrigerant and achieves the ice-making function through heat exchange with the ice-making area on the outside of the outer cylinder 21.

[0033] Welding not only secures the components but also ensures leak-free connections through weld sealing. The flared ends 23 at both ends of the inner cylinder 22 form cooling channels 24, making them more resistant to high pressure. Furthermore, welding at these two locations allows the welding device to perform laser welding directly from the outside of the ice-making cylinder 2, eliminating the need to insert the welding head into the cooling channels 24, thus improving welding efficiency. Additionally, after welding and airtightness testing, no leakage in the cooling channels 24 indicates a successful weld; if leakage is detected, the weld is unsuccessful and requires rework. Repairs can be performed directly from the outside of the ice-making cylinder 2, increasing the yield rate of the welding process.

[0034] The inner wall of the inner cylinder 22 is provided with a liquid delivery pipe 25 and a gas delivery pipe 26 that connect to the refrigeration channel 24. The liquid delivery pipe 25 is used to directly inject liquid refrigerant into the refrigeration channel 24. After the refrigerant is converted into a gaseous state in the refrigeration channel 24, it is transported out of the refrigeration channel 24 through the gas delivery pipe 26. One end of both the liquid delivery pipe 25 and the gas delivery pipe 26 extends outward from the ice-making cylinder 2. The liquid delivery pipe 25 and the gas delivery pipe 26 are arranged vertically, and the diameter of the liquid delivery pipe 25 is smaller than the diameter of the gas delivery pipe 26.

[0035] The ends of the liquid inlet pipe 25 and the gas inlet pipe 26 are connected to the refrigeration system (not shown in the figure). The refrigeration system consists of a compressor, a condenser, and a throttling device. The suction end of the compressor is connected to the gas inlet pipe 26 through a pipe (to receive the refrigerant vaporized in the refrigeration channel 24). The outlet of the throttling device is connected to the liquid inlet pipe 25 through a pipe (to supply low-temperature liquid refrigerant to the refrigeration channel 24).

[0036] The compressor draws low-temperature, low-pressure gaseous refrigerant from the refrigeration channel 24, compresses it to become high-temperature, high-pressure gaseous refrigerant, at which point the refrigerant carries a large amount of heat converted from electrical energy. This high-temperature, high-pressure gaseous refrigerant is then pumped into the condenser (the heat dissipation section, typically composed of metal fins and a fan). The fan blows air through the condenser to dissipate heat, and the high-temperature, high-pressure refrigerant gas releases heat into the outside air. As heat dissipates, the refrigerant condenses from a gaseous state into a medium-temperature, high-pressure liquid (heat is discharged to the external environment from here). The medium-temperature, high-pressure liquid refrigerant flows through a thin capillary tube, allowing the medium-temperature, high-pressure refrigerant to... The high-pressure liquid is forced through the capillary tube, causing its pressure to drop sharply. After flowing out of the capillary tube, the refrigerant becomes a low-temperature, low-pressure liquid (mixed with a small amount of gas). The low-temperature, low-pressure liquid refrigerant is sprayed into the refrigeration channel 24. The liquid refrigerant absorbs a large amount of heat in the refrigeration channel 24 (this heat comes from water or beverages that need to be made into ice, and heat exchange occurs directly through the outer cylinder 21), and evaporates into a low-temperature, low-pressure gas. The heat is quickly absorbed, and the temperature drops below the freezing point. An ice layer gradually forms on the outer wall of the outer cylinder 21. The low-temperature, low-pressure gaseous refrigerant (mixed with a small amount of liquid) that has absorbed heat is drawn back into the compressor, and the cycle repeats.

[0037] A baffle 27 is installed inside the refrigeration channel 24, and the end of the liquid delivery pipe 25 that connects to the refrigeration channel 24 is aligned with the baffle 27. During the process of the liquid delivery pipe 25 directly spraying liquid refrigerant into the refrigeration channel 24, it is blocked and dispersed by the baffle 27, which allows it to be distributed more quickly and evenly throughout the refrigeration channel 24, preventing localized icing on the surface of the outer cylinder 21, which could cause the spiral scraper 4 to jam.

[0038] In this embodiment, a connecting flange 28 is provided on the outer rear end of the outer cylinder 21. The connecting flange 28 is formed with a plurality of fixing grooves 29 arranged equidistantly along its circumference. The mounting housing 1 is formed with a mounting hole 11 for the outer cylinder 21 to pass through. The inner sidewall of the mounting hole 11 is formed with a mounting boss 12 for fixed connection with the connecting flange 28. First, the outer cylinder 21 is passed through the mounting hole 11 and the connecting flange 28 is brought into contact with the mounting boss 12. Then, a plurality of screws are passed through different fixing grooves 29 and tightened on the mounting boss 12. During the tightening process, the connecting flange 28 is pressed together, thereby fixing the outer cylinder 21 onto the mounting housing 1.

[0039] Additionally, a fixing frame 13 is installed on the side of the mounting housing 1 away from the drive module 5. The fixing frame 13 is equipped with a sealing filler 14 for filling the gaps between the connecting flange 28 and the mounting boss 12, as well as the gaps between the outer wall of the outer cylinder 21 and the inner wall of the mounting boss 12. The sealing filler 14 is an annular silicone sealant. After the outer cylinder 21 is fixedly installed on the mounting housing 1, the sealing filler 14 fills the gaps between the connecting flange 28 and the mounting boss 12, and also fills the gaps between the outer wall of the outer cylinder 21 and the inner wall of the mounting boss 12. This improves the sealing performance between the outer cylinder 21 and the mounting housing 1, preventing water and beverages in the ice-making chamber from leaking out through the gaps between the outer cylinder 21 and the mounting housing 1 after the mounting housing 1 is installed in the ice-making chamber.

[0040] like Figure 5-7 As shown, the leak-proof component 6 includes an annular sealing cover 61. The outer circumferential side of the sealing cover 61 is welded and fixed to the inner front wall of the outer cylinder 21, thereby achieving a sealed connection between the sealing cover 61 and the inner front wall of the outer cylinder 21. Welding the outer circumferential side of the sealing cover 61 to the inner front wall of the outer cylinder 21 not only achieves a fixed connection between the two, but also ensures no leakage at the connection point through the weld seal. Furthermore, the position between the front face of the sealing cover 61 and the inner wall of the outer cylinder 21 is used as the grinding position. Compared to grinding the welding position of existing sealing cover 61, the welding position of this sealing cover 61 will not leak after grinding, solving the problem of air leakage during grinding.

[0041] The leak-proof assembly 6 also includes a connecting cover 64 located in front of the sealing cover 61 and a connecting housing 63 located behind the sealing cover 61. The connecting cover 64 and the connecting housing 63 are fixedly installed, and the connecting housing 63 is located inside the inner cylinder 22. A sleeve 610 is formed at the center of the connecting cover 64 and sleeved on the outside of the rotating shaft 3. An oil seal ring 612 and a bearing 611 are arranged in a front-to-back manner between the rotating shaft 3 and the inner wall of the sleeve 610. The oil seal ring 612 is used to fill the gap between the rotating shaft 3 and the inner wall of the sleeve 610 to prevent water or beverages from leaking out from the gap between them. The bearing 611 is used to support the rotating shaft 3 and make the rotating shaft 3 and the sleeve 610 rotatably connected to reduce the friction between them.

[0042] A mounting recess 62 is formed in the middle of the side of the sealing cover plate 61 away from the connecting housing 63. A sealing ring 65, which is a silicone sealing ring, is placed in the mounting recess 62 and positioned between the connecting cover body 64 and the sealing cover plate 61. By providing the sealing ring 65 to fill the gap between the connecting cover body 64 and the sealing cover plate 61, the sealing performance between the two is improved, preventing water or beverages from leaking out from the gap. Furthermore, the combined action of the sealing ring 65 and the oil seal ring 612 effectively prevents water or beverage leakage.

[0043] To achieve a fixed connection between the connecting cover 64 and the connecting housing 63, a connecting component is provided between the connecting housing 63 and the connecting cover 64 for fixing the two together. Several connecting components are provided and arranged in an array around the center point of the sealing cover 61. The connecting component includes a connecting seat 66 formed inside the connecting housing 63 and a positioning sleeve 67 formed on the side of the connecting cover 64 near the connecting housing 63. The positioning sleeve 67 is used to fit over the outside of the connecting seat 66. The connecting cover 64 is formed with a threaded hole 613 that communicates with the positioning sleeve 67 and is used to accommodate a bolt 68. The threaded portion of the bolt 68 is threadedly connected to the connecting seat 66, and the threaded head portion of the bolt 68 is placed in the threaded hole 613.

[0044] First, place the sealing ring 65 in the mounting recess 62. Then, place the connecting cover 64 in front of the sealing cover 61 and make it contact the sealing ring 65. Place the connecting housing 63 in the back of the sealing cover 61 and make it contact the back of the sealing cover 61. The positioning sleeve 67 is fitted on the outside of the connecting seat 66 to play a positioning role. Insert the bolt 68 into the screw hole 613 and tighten it. The threaded part of the bolt 68 is screwed into the connecting seat 66. After tightening, the connecting cover 64 and the connecting housing 63 are fixedly connected. The mounting recess 62 is sandwiched between the connecting cover 64 and the connecting housing 63.

[0045] After the bolt 68 is tightened, a sealing plug 69 is inserted into the opening of the screw hole 613. The outer side of the sealing plug 69 is interference-fitted with the inner sidewall of the screw hole 613, thereby blocking the screw hole 613 and further preventing water or beverage from leaking out.

[0046] A temperature sensor 614 is installed on the connecting cover 64. The sensing end of the temperature sensor 614 passes through the connecting cover 64 and extends to its outside to detect the temperature of the water or beverage in the ice-making chamber. When the temperature of the water or beverage in the ice-making chamber reaches the specified temperature, it is detected by the sensing end of the temperature sensor 614, and the temperature information is transmitted to the ice maker, which then controls the refrigeration system to stop operating. Conversely, when the sensing end of the temperature sensor 614 detects that the temperature of the water or beverage is too high, it transmits the temperature information to the ice maker, which then controls the refrigeration system to operate to process the water or beverage into ice.

[0047] In summary, this utility model possesses the aforementioned excellent characteristics, enabling it to achieve unprecedented efficiency in use and thus become a highly practical product.

[0048] The above description is only a preferred embodiment of this utility model. For those skilled in the art, there will be changes in the specific implementation method and application scope based on the idea of ​​this utility model. The content of this specification should not be construed as a limitation of this utility model.

Claims

1. An ice-making mechanism for an ice maker, comprising a mounting housing (1) and an ice-making cylinder (2) mounted on the front side of the mounting housing (1), a drive module (5) mounted on the rear side of the mounting housing (1), an output shaft of the drive module (5) passing through the mounting housing (1) and connected to a rotating shaft (3), the rotating shaft (3) passing through the interior of the ice-making cylinder (2); a spiral scraper (4) for scraping off the ice layer on its outer surface is sleeved on the outer side of the ice-making cylinder (2), the end of the rotating shaft (3) passing through the ice-making cylinder (2) and fixed to the spiral scraper (4), characterized in that: The ice-making cylinder (2) includes an outer cylinder (21) and an inner cylinder (22) coaxially disposed inside the outer cylinder (21). The front end and rear end of the inner cylinder (22) are both formed with flared portions (23) that expand outward. The outer edges of the flared portions (23) at both ends of the inner cylinder (22) are welded and fixed to the inner sidewall of the outer cylinder (21). The inner sidewall of the outer cylinder (21), the outer sidewall of the inner cylinder (22), and the outer sidewall of the flared portions (23) at the front and rear ends of the inner cylinder (22) together form a refrigeration channel (24) extending along the axial direction. The front end of the outer cylinder (21) is provided with a leak-proof assembly (6) for sealing it; the leak-proof assembly (6) includes a sealing cover (61), the outer circumferential side of the sealing cover (61) is welded and fixed to the inner wall of the front end of the outer cylinder (21).

2. The ice making mechanism of claim 1, wherein: The leak-proof assembly (6) also includes a connecting cover (64) placed in front of the sealing cover (61). A sleeve (610) is formed at the center of the connecting cover (64) and fitted onto the outside of the rotating shaft (3). An oil seal ring (612) and a bearing (611) are arranged in a front-to-back manner between the rotating shaft (3) and the inner wall of the sleeve (610). The oil seal ring (612) is used to fill the gap between the rotating shaft (3) and the inner wall of the sleeve (610), and the bearing (611) is used to support the rotating shaft (3). A sealing ring (65) is provided between the connecting cover (64) and the sealing cover (61).

3. The ice maker of claim 2, wherein: The leak-proof assembly (6) also includes a connecting housing (63) disposed on the rear side of the sealing cover (61), and the connecting cover (64) is fixedly disposed with the connecting housing (63).

4. The ice maker of claim 3, wherein: The sealing cover (61) has a mounting recess (62) formed in the middle of the side away from the connecting housing (63), and the sealing ring (65) is placed in the mounting recess (62).

5. The ice maker of claim 4, wherein: A connecting component is provided between the connecting housing (63) and the connecting cover (64) for fixing the two together. Several connecting components are provided and arranged in an array around the center point of the sealing cover (61).

6. The ice-making mechanism of an ice maker according to claim 5, characterized in that: The connecting component includes a connecting seat (66) formed inside the connecting housing (63), and a positioning sleeve (67) formed on the side of the connecting cover (64) near the connecting housing (63). The positioning sleeve (67) is used to fit on the outside of the connecting seat (66). The connecting cover (64) is formed with a screw hole (613) that communicates with the positioning sleeve (67) and is used to accommodate a bolt (68). The screw portion of the bolt (68) is threadedly connected to the connecting seat (66), and the screw head portion of the bolt (68) is placed in the screw hole (613). A sealing plug (69) is inserted into the opening of the screw hole (613) with an interference fit.

7. The ice maker of claim 1, wherein: The refrigeration channel (24) is in the shape of an annular column. The inner wall of the inner cylinder (22) is provided with a liquid supply connection pipe (25) and a gas supply connection pipe (26) that connect the refrigeration channel (24). One end of the liquid supply connection pipe (25) and the gas supply connection pipe (26) extends outward from the ice-making cylinder (2). The liquid supply connection pipe (25) and the gas supply connection pipe (26) are arranged vertically, and the diameter of the liquid supply connection pipe (25) is smaller than the diameter of the gas supply connection pipe (26).

8. The ice maker of claim 7, wherein: A baffle (27) is installed inside the refrigeration channel (24), and the end of the infusion connection pipe (25) that is connected to the refrigeration channel (24) is aligned with the baffle (27).

9. The ice maker of claim 1, wherein: A connecting flange (28) is provided on the outer rear side of the outer cylinder (21). The connecting flange (28) is formed with a number of fixing grooves (29) arranged in an equidistant array along its circumference. The mounting housing (1) is formed with a mounting hole (11) through which the outer cylinder (21) passes. The inner sidewall of the mounting hole (11) is formed with a mounting boss (12) for fixed connection with the connecting flange (28).

10. The ice maker of claim 9, wherein: A fixed frame (13) is installed on the side of the housing (1) away from the drive module (5). The fixed frame (13) is provided with a sealing filler (14) for filling the gap between the connecting flange (28) and the mounting boss (12) and the gap between the outer wall of the outer cylinder (21) and the inner wall of the mounting boss (12).

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