Snowflake machine

Abstract

The utility model discloses a snowflake machine, which belongs to the field of food processing equipment, solves the problems of low efficiency, high cost, low heat conduction efficiency caused by stainless steel parts and power waste, and adopts the technical scheme that the snowflake machine comprises a machine body and an ice-making assembly, the ice-making assembly comprises a refrigeration roller and a support shaft, and a refrigerant cavity is formed in the refrigeration roller; the refrigeration roller comprises a roller body, a first end cover and a second end cover, the supporting shaft is rotationally connected with the second end cover, the second end cover is in transmission connection with the driving shaft, the supporting shaft extends out of the refrigerant cavity, the second end cover is in rotary sealing fit with the supporting shaft, and the supporting shaft is provided with a refrigerant input channel and a refrigerant output channel. The first end cover and the stainless steel outer cylinder are welded, fixed and sealed. The production efficiency of the whole evaporator assembly is improved, and the cost is reduced; and the inner cylinder is made of aluminum alloy, so that low heat conduction efficiency is prevented from affecting refrigeration efficiency, causing power waste and affecting overall product cost and user experience.

Description

Technical Field

[0001] This utility model relates to the field of food processing equipment, and in particular to a snowflake machine. Background Technology

[0002] With social development and the diversification of people's lives, snacks, cold drinks, desserts and other delicacies are loved by people, especially young people. As a result, equipment for processing these kinds of foods has emerged, such as snow shaved ice machines, which are a type of ice maker that can quickly freeze liquid into ice and cut it with a knife and spatula to form fine snow shaved ice. Snow shaved ice can be made and eaten immediately. Existing snow shaved ice machines are mainly composed of two major units: a refrigeration unit and a snow-making unit. The core component of the snow-making unit is the evaporator drum. The evaporator drum is driven to rotate by a motor. The refrigeration unit inputs high-temperature and high-pressure refrigerant into the evaporator drum through the refrigerant inlet pipe, and then sends it back to the refrigeration compressor through the refrigerant return pipe. Due to the rapid change in the thermodynamic conditions inside the evaporator drum, the temperature of the outer surface of the evaporator drum drops rapidly to below -30°C, so that the liquid freezes quickly and adheres to the surface of the evaporator drum. At this time, the ice layer is scraped off from the surface of the evaporator drum by a corresponding blade, and snowflake-shaped granular ice shaved ice is scraped out.

[0003] The prior art CN106839555A discloses a snow machine roller, including a roller body with an internal cavity. The roller also includes a cylindrical rotating shaft closed at one end and a return pipe inserted into the cylindrical rotating shaft. The two ends of the cylindrical rotating shaft are sealed to the two ends of the return pipe, and a liquid inlet sealing cavity is formed between the cylindrical rotating shaft and the return pipe. A motor connecting shaft is provided through one end of the roller body. One end of the cylindrical rotating shaft extends into the roller body and is rotatably connected to the inner end of the motor connecting shaft. A cylindrical end cap component is provided through the other end of the roller body. The other end of the cylindrical rotating shaft is inserted into the cylindrical end cap component and extends to the outer end of the cylindrical end cap component. At least one refrigerant nozzle is provided on the cylindrical rotating shaft. A return nozzle communicating with the return pipe is provided at the closed end of the cylindrical rotating shaft. The cylindrical rotating shaft and the cylindrical end cap component are rotatably connected, and a mechanical sealing mechanism is provided between the cylindrical rotating shaft and the cylindrical end cap component.

[0004] When producing the rollers for snowflake machines, the roller rings are made of food-contact grade stainless steel. Machining is less efficient than mold manufacturing, resulting in lower overall production efficiency of the evaporator assembly and higher final costs. Furthermore, the low heat conduction efficiency of stainless steel parts affects the overall cooling efficiency of the evaporator assembly, causing power waste and consequently impacting overall product cost and user experience. Utility Model Content

[0005] The purpose of this invention is to provide a snowflake machine that solves the problems of low efficiency, high cost, poor heat conduction efficiency leading to reduced refrigeration efficiency, power waste, and consequently high overall product cost and negative impact on user experience caused by using stainless steel parts in the machining of the drum. By producing the drum in one piece, the overall production efficiency of the evaporator assembly is improved, thereby reducing costs. The inner drum is made of aluminum alloy to avoid the problems of low heat conduction efficiency affecting refrigeration efficiency, power waste, and impacting overall product cost and user experience.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a snow machine, comprising a body and an ice-making component disposed within the body, the ice-making component comprising a refrigeration drum and a support shaft, a refrigerant chamber formed within the refrigeration drum, the refrigeration drum comprising a cylinder and a first end cap and a second end cap respectively connected to both ends of the cylinder, the support shaft being located within the refrigeration drum, one end of the support shaft being rotatably connected to the inner end of the second end cap, the outer end of the second end cap being connected to a drive shaft for transmission, the other end of the support shaft passing through the first end cap and extending out of the refrigerant chamber for fixation, the second end cap and the support shaft being rotatably and sealingly fitted, the support shaft having a refrigerant input channel and a refrigerant output channel respectively communicating with the refrigerant chamber, the cylinder comprising an integrally formed aluminum alloy inner cylinder and a stainless steel outer cylinder, the first end cap being welded and fixed to the stainless steel outer cylinder and sealed.

[0007] After adopting the above technical solution, this utility model has the following advantages: During ice making, the refrigerant is delivered to the refrigerant chamber through the refrigerant input channel. The refrigerant entering the refrigerant chamber circulates through the refrigerant input channel and the refrigerant output channel, avoiding prolonged ice making time that would affect ice making efficiency. This ensures stable ice formation on the outer wall of the ice-making drum, thereby improving the user experience. When installing the support shaft, one end of the support shaft is rotatably connected to the inner side of the second end cover, while the outer end of the second end cover is connected to the drive shaft. During the process of the refrigerant entering the refrigerant chamber, the drive shaft drives the support shaft to rotate, making the refrigerant more... The refrigerant is evenly distributed on the inner wall of the aluminum alloy inner cylinder, resulting in a relatively uniform distribution of ice on the outer periphery of the ice-making drum. This ensures a consistent amount of ice shavings are removed from all parts of the drum, preventing significant differences in ice volume even with the same extraction process. During manufacturing, the ice-making drum is divided into an inner and outer cylinder. The inner cylinder is made of aluminum alloy, improving its cooling efficiency, reducing ice-making time and power waste, thereby lowering overall product costs and enhancing the user experience. The first end cap is welded to the stainless steel outer cylinder for a tight seal, preventing refrigerant leakage and potential safety hazards. Furthermore, the high cooling efficiency of aluminum alloy and the smooth surface of stainless steel facilitate the formation of flake ice.

[0008] Furthermore, the edge of the first end cap is provided with a first protruding ring, which extends into the aluminum alloy inner cylinder for interference fit.

[0009] Using the aforementioned technical solution, when the first end cap is connected to the stainless steel outer cylinder, the first convex ring on the edge of the first end cap extends into the aluminum alloy inner cylinder, and the outer peripheral wall of the first convex ring is interference-fitted with the inner peripheral surface of the aluminum alloy inner cylinder. This improves the sealing effect between the first end cap and the stainless steel outer cylinder, preventing refrigerant leakage from the first end cap. Furthermore, it enhances the stability of the first end cap installation, preventing it from detaching from the stainless steel outer cylinder and the aluminum alloy inner cylinder under high-pressure refrigerant impact, thereby reducing the possibility of safety hazards in the ice-making drum. The interference fit of the first convex ring into the aluminum alloy inner cylinder allows for pre-positioning of the first end cap, facilitating welding between the first end cap and the stainless steel outer cylinder.

[0010] Furthermore, the second end cap is welded and fixed to the stainless steel outer cylinder and sealed; or, the second end cap and the cylinder are integrally formed.

[0011] Using the aforementioned technical solution, when connecting the second end cap, the second end cap can be sealed and fixed to the stainless steel outer cylinder by welding, avoiding refrigerant leakage between the second end cap and the stainless steel outer cylinder and potential safety hazards; alternatively, the second end cap and the stainless steel outer cylinder can be integrally formed during the production of the ice-making roller, avoiding the sealing problems that may occur when the second end cap is welded and fixed, and further preventing refrigerant leakage between the second end cap and the stainless steel outer cylinder.

[0012] Furthermore, the refrigerant input channel includes a nozzle located within the refrigerant chamber, the nozzle being arranged around the outer periphery of the support shaft, and the nozzle having spray holes.

[0013] By adopting the aforementioned technical solution, a nozzle is installed in the refrigerant input channel. The nozzle is arranged around the outer periphery of the support shaft, which facilitates the spraying of refrigerant through the nozzle holes. This facilitates the refrigerant spraying out and also facilitates the uniform dispersion of refrigerant in the refrigerant cavity, thereby improving the uniform distribution and relatively uniform thickness of the frozen ice layer on the outer peripheral wall of the stainless steel outer cylinder.

[0014] Furthermore, a pipe bracket for supporting and fixing the nozzle is provided on the outer periphery of the support shaft.

[0015] By adopting the aforementioned technical solution, the nozzle is wound around the outer wall of the support shaft and then supported by a pipe bracket, which improves the stability of the nozzle and prevents the nozzle from detaching from the support shaft when the support shaft rotates, thus affecting the entry of the refrigerant into the refrigerant chamber; and improves the safety of the refrigeration cylinder.

[0016] Furthermore, the refrigerant input channel also includes a connecting pipe that runs through the refrigerant output channel and extends out of the refrigerant output channel to communicate with the nozzle.

[0017] By adopting the aforementioned technical solution, when the refrigerant enters the refrigerant chamber, it is guided by the connection between the connecting pipe and the nozzle, thereby reducing the heat exchange between the input refrigerant and the refrigerant located in the refrigerant output channel, thus avoiding the input refrigerant from being affected and ensuring the refrigeration efficiency of the refrigerant.

[0018] Furthermore, the support shaft is provided with a radial hole and an axial hole. Both ends of the radial hole are connected to the refrigerant cavity. One end of the axial hole is connected to the radial hole to form a refrigerant output channel. The other end of the axial hole is connected to the refrigerant circulation system. The connecting pipe extends out from the top of the radial hole.

[0019] The aforementioned technical solution includes an axial hole and a radial hole on the support shaft. The axial hole connects to the refrigerant circulation system, facilitating the circulation of refrigerant in the refrigerant chamber and further ensuring the ice-making efficiency of the ice-making drum. The radial hole facilitates the refrigerant's entry into the axial hole during circulation, thereby ensuring smooth refrigerant circulation in the refrigerant chamber and reducing the impact of long refrigerant usage time on ice-making performance.

[0020] Furthermore, the thickness of the aluminum alloy inner cylinder is greater than the thickness of the stainless steel outer cylinder.

[0021] By adopting the aforementioned technical solution, the thickness of the aluminum alloy inner cylinder is set to be greater than that of the stainless steel outer cylinder, ensuring the cooling efficiency of the aluminum alloy inner cylinder, thereby improving the cooling efficiency of the cylinder, reducing power waste, lowering the overall product cost, and improving the user experience.

[0022] Furthermore, the inner wall surface of the aluminum alloy inner cylinder is provided with multiple cooling ribs.

[0023] By adopting the aforementioned technical solution, multiple cooling ribs are provided on the inner wall surface of the aluminum alloy inner cylinder, which increases the contact area between the refrigerant and the inner wall surface of the aluminum alloy inner cylinder, thereby increasing the cooling efficiency of the aluminum alloy inner cylinder and further improving the refrigeration efficiency of the aluminum alloy inner cylinder.

[0024] Furthermore, the cooling guide rib extends axially along the aluminum alloy inner cylinder.

[0025] By adopting the aforementioned technical solution, the cooling guide ribs extend circumferentially along the aluminum alloy inner cylinder to lengthen the cooling guide ribs, further increasing the contact area between the inner circumferential side of the aluminum alloy inner cylinder and the refrigerant, and further improving the cooling efficiency of the aluminum alloy inner cylinder. Attached Figure Description

[0026] The present invention will be further described below with reference to the accompanying drawings:

[0027] Figure 1 This is a schematic diagram of a snowflake machine according to the present invention;

[0028] Figure 2 This utility model Figure 1 Enlarged view of point A in the middle

[0029] Figure 3 This is a schematic diagram of the sealing installation of the second end cap of this utility model;

[0030] Figure 4 This utility model Figure 1 Enlarged view at point B

[0031] Figure 5 This is a schematic diagram of the installation of the nozzle and pipe support of this utility model. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments.

[0033] The terms "first," "second," etc. (if present) in the specification and claims of this utility model are used to distinguish similar objects, not to describe a specific order or sequence. Even if "second" is used before a technical feature for distinction, it does not necessarily imply the presence of "first." It should be understood that in this utility model, "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. It should be understood that in this utility model, "multiple" refers to two or more. "And / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, X and / or Y can represent: X alone, X and Y simultaneously, and Y alone. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. "Containing X, Y, and Z," "Containing X, Y, and Z" means that all three X, Y, and Z are included; "Containing X, Y, or Z" means that one of X, Y, and Z is included; "Containing X, Y, and / or Z" means that any one, two, or three of X, Y, and Z are included.

[0034] The technical solution of this utility model will be described in detail below with specific embodiments. The following specific embodiments can be selected to be combined or substituted with each other according to the actual situation, and the same or similar concepts or processes may not be described again in some embodiments.

[0035] like Figure 1 and Figure 2As shown, this utility model provides a snow machine, including a body and an ice-making assembly disposed within the body. The ice-making assembly includes a refrigeration drum 1 and a support shaft 2. A refrigerant chamber 11 is formed inside the refrigeration drum 1. The refrigeration drum 1 includes a cylinder 12 and a first end cap 121 and a second end cap 122 respectively connected to both ends of the cylinder 12. The support shaft 2 is located inside the refrigeration drum 1. One end of the support shaft 2 is rotatably connected to the inner end of the second end cap 122, and the outer end of the second end cap 122 is connected to a drive shaft 4 for transmission. The other end of the support shaft 2 passes through the first end cap 121 and extends out of the refrigerant chamber 11 for fixation. The second end cap 122 is rotatably and sealingly fitted with the support shaft 2. The support shaft 2 is provided with a refrigerant input channel 111 and a refrigerant output channel 112 respectively communicating with the refrigerant chamber 11. During ice making, the refrigerant is transported into the refrigerant chamber 11 along the support shaft 2 through the refrigerant input channel 111. The refrigerant entering the refrigerant chamber 11 causes a rapid drop in temperature on the outer wall of the cylinder 12. This rapid temperature drop freezes the liquid material into ice on the outer wall of the cylinder 12. When needed for consumption, the ice layer can be scraped off with a knife. The support shaft 2 is rotated by the drive shaft 4. With the rotation of the support shaft 2, the refrigerant is evenly distributed in the refrigerant chamber 11, resulting in a uniform distribution and thickness of the ice layer when the outer wall of the cylinder 12 freezes. This ensures that the amount of ice removed from different parts of the outer wall of the cylinder 12 is consistent, avoiding difficulty in controlling the amount removed. Used refrigerant is discharged from the refrigerant output channel 112, allowing the refrigerant to circulate between the refrigerant input channel 111, the refrigerant chamber 11, and the refrigerant output channel 112. This prevents a decrease in ice-making capacity after prolonged use and ensures a fast freezing rate on the outer wall of the cylinder 12.

[0036] In this embodiment, as Figure 2 As shown, the cylinder 12 includes an integrally formed aluminum alloy inner cylinder 124 and a stainless steel outer cylinder 123. By setting the cylinder 12 into a double-layered configuration of an inner and outer cylinder, with the inner layer being made of aluminum alloy, the cooling efficiency of the cylinder 12 is improved. After the refrigerant enters the refrigerant chamber 11, the temperature of the outer peripheral wall of the stainless steel outer cylinder 123 drops rapidly due to the high cooling efficiency of the aluminum alloy inner cylinder 124, causing the liquid to form an ice layer on the outer peripheral wall of the stainless steel outer cylinder 123. Compared with the roller in the prior art CN106839555A, which is only machined from stainless steel, the cooling efficiency is higher. The first end cap 121 is welded and fixed to the stainless steel outer cylinder 123 and sealed. The first end cap 121 and the stainless steel outer cylinder 123 are fixed and sealed by welding, which improves the sealing effect between the first end cap 121 and the refrigerant chamber 11 and prevents the refrigerant from leaking between the stainless steel outer cylinder 123 and the first end cap 121, thus avoiding potential safety hazards. Furthermore, the aluminum alloy inner cylinder 124 has high heat conduction efficiency, and the stainless steel outer cylinder 123 is smooth, making it easy to scrape and form snowflakes.

[0037] To improve the sealing effect after the first end cap 121 is installed, such as Figure 2 As shown, the edge of the first end cap 121 is provided with a first protruding ring 1211. After the first end cap 121 is welded and sealed, the first protruding ring 1211 extends into the aluminum alloy inner cylinder 124 and is interference-fitted with the inner circumferential surface of the aluminum alloy inner cylinder 124. The interference fit improves the sealing effect between the first end cap 121 and the aluminum alloy inner cylinder 124, preventing refrigerant leakage between the aluminum alloy inner cylinder 124 and the first end cap 121. The interference fit also improves the stability of the first end cap 121 after installation. The interference fit of the first protruding ring 1211 into the aluminum alloy inner cylinder 124 enables the pre-positioning of the first end cap 121, facilitating the welding of the first end cap 121 to the stainless steel outer cylinder 123.

[0038] When manufacturing the stainless steel outer cylinder 123 and the aluminum alloy inner cylinder 124, the thickness of the aluminum alloy inner cylinder 124 is set to be greater than that of the stainless steel outer cylinder 123. During heat conduction, the heat conduction efficiency of the aluminum alloy is greater than that of the stainless steel outer cylinder 123, further ensuring the improvement of heat conduction efficiency, thereby steadily improving ice-making efficiency, reducing power waste, and thus reducing the overall cost of the product and improving the user experience.

[0039] To improve the cooling efficiency of the aluminum alloy inner cylinder 124, such as Figure 2 As shown, the inner wall surface of the aluminum alloy inner cylinder 124 is provided with multiple cooling ribs 113. By setting multiple cooling ribs 113, the surface area of ​​the inner wall surface of the aluminum alloy inner cylinder 124 is increased, thereby improving the cooling efficiency of the aluminum alloy inner cylinder 124.

[0040] To further improve the cooling efficiency of the aluminum alloy inner cylinder 124, such as Figure 1 and Figure 2 As shown, the cooling rib 113 extends along the axial direction of the aluminum alloy inner cylinder 124, increasing the length of the cooling rib 113, further increasing the surface area of ​​the inner wall of the aluminum alloy inner cylinder 124, and further improving the cooling efficiency of the aluminum alloy inner cylinder 124.

[0041] In another embodiment, such as Figure 3 As shown, the second end cap 122 is welded and fixed to the stainless steel outer cylinder 123 and sealed. Specifically, the edge of the second end cap 122 is welded to the stainless steel outer cylinder 123, and a second protruding ring 1221 is provided on the edge of the second end cap 122. The second protruding ring 1221 extends into the aluminum alloy inner cylinder 124 and is interference-fitted with the inner circumferential surface of the aluminum alloy inner cylinder 124, thereby improving the sealing effect after the second end cap 122 is sealed and avoiding refrigerant leakage from the second end cap 122 and the stainless steel outer cylinder 123, which could lead to safety hazards.

[0042] To prevent refrigerant leakage from the second end cap 122 and the stainless steel outer cylinder 123, such as Figure 1As shown, the second end cap 122 and the cylinder 12 can also be integrally formed. Specifically, during the casting of the cylinder 12, the second end cap 122 and the stainless steel outer cylinder 123 are integrally formed to avoid the safety hazard of refrigerant leakage caused by gaps between the second end cap 122 and the stainless steel outer cylinder 123. When the second end cap 122 and the stainless steel outer cylinder 123 are integrally formed, compared with the left and right end caps of the roller in the prior art CN106839555A, only the first end cap 121 needs to be welded and sealed for fixation, reducing at least two welding processes that could lead to inconsistent welding results and affect the sealing effect. This avoids refrigerant leakage in the refrigerant cavity 11 and improves the safety performance of the cylinder 12.

[0043] To avoid mixing of the refrigerant during the refrigerant circulation process, such as Figure 1 As shown, the refrigerant input channel 111 includes a nozzle 3 located within the refrigerant chamber 11. The nozzle 3 extends from the refrigerant input channel 111 into the refrigerant chamber 11, and is wound around the outer periphery of the support shaft 2 within the refrigerant chamber 11. The nozzle 3 has spray holes 31. When the nozzle 3 is wound around the support shaft 2, and the drive shaft 4 drives the support shaft 2 to rotate, the refrigerant can be relatively evenly dispersed within the refrigerant chamber 11. Figure 4 As shown, there are multiple nozzles 31 on the nozzle 3 distributed along the axial direction of the support shaft 2, which increases the uniformity of the distribution of the refrigerant after it enters the refrigerant chamber 11.

[0044] To ensure stable installation of nozzle 3, such as Figure 1 and Figure 5 As shown, the outer periphery of the nozzle 3 is provided with a tube bracket 5 to support and fix the nozzle 3. The tube bracket 5 includes a first bracket 51 and a second bracket 52. The first bracket 51 is located at the end of the support shaft 2 near the first end cap 121. The first bracket 51 is fixed to the support shaft 2 by screws, which stabilizes the nozzle 3 while stabilizing the first bracket 51. The second bracket 52 is located at the end of the support shaft 2 away from the first end cap 121. The edge of the second bracket 52 is bent toward the first bracket 51 to form a snap edge 521. A part of the nozzle 3 away from the first end cap 121 abuts against the first bracket 51 and the snap edge 521, thereby stabilizing the other side of the nozzle 3. The second bracket 52 is also fixedly connected to the support shaft 2 by screws, which stabilizes the second bracket 52 and thus stabilizes the nozzle 3.

[0045] In another embodiment, the refrigerant input channel 111 further includes a connecting pipe 32 that passes through the refrigerant output channel 112. Specifically, when the connecting pipe 32 is installed, it extends out of the refrigerant output channel 112 and communicates with the nozzle 3, so that the refrigerant entering the refrigerant chamber 11 is transported from the connecting pipe 32 to the nozzle 3, while the refrigerant already used in the refrigerant chamber 11 is discharged from the refrigerant output channel 112, ensuring that the ice-making efficiency of the refrigerant in the refrigerant chamber 11 is comparable.

[0046] To facilitate refrigerant circulation, such as Figure 5 As shown, the support shaft 2 is provided with a radial hole 22 and an axial hole 21. Both ends of the radial hole 22 are connected to the refrigerant chamber 11. One end of the axial hole 21 is connected to the radial hole 22 to form a refrigerant output channel 112. The other end of the axial hole 21 is connected to the refrigerant circulation system. The connecting pipe 32 extends from the top of the radial hole 22. The refrigerant enters the refrigerant chamber 11 from the connecting pipe 32 and the nozzle 3. The refrigerant entering the refrigerant chamber 11 is discharged outward through the axial hole 21 and the radial hole 22. Driven by the refrigerant circulation system, the circulation speed of the refrigerant is stabilized, thereby ensuring the stability of the ice-making efficiency.

[0047] In addition to the preferred embodiments described above, there are other embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection claimed by this utility model.

Claims

1. A snow machine, comprising a body and an ice-making component disposed within the body, characterized in that, The ice-making assembly includes a refrigeration drum and a support shaft. A refrigerant chamber is formed inside the refrigeration drum. The refrigeration drum includes a cylinder and a first end cap and a second end cap respectively connected to both ends of the cylinder. The support shaft is located inside the refrigeration drum. One end of the support shaft is rotatably connected to the inner end of the second end cap, and the outer end of the second end cap is connected to a drive shaft for transmission. The other end of the support shaft passes through the first end cap and extends out of the refrigerant chamber for fixation. The second end cap and the support shaft are rotatably sealed together. The support shaft is provided with a refrigerant input channel and a refrigerant output channel respectively communicating with the refrigerant chamber. The cylinder includes an integrally formed aluminum alloy inner cylinder and a stainless steel outer cylinder. The first end cap is welded and fixed to the stainless steel outer cylinder and sealed.

2. The snowflake machine according to claim 1, characterized in that, The edge of the first end cap is provided with a first protruding ring, which extends into the aluminum alloy inner cylinder for interference fit.

3. The snowflake machine according to claim 1, characterized in that, The second end cap is welded and fixed to the stainless steel outer cylinder and sealed; or, the second end cap and the cylinder are integrally formed.

4. The snowflake machine according to claim 1, characterized in that, The refrigerant input channel includes a nozzle located inside the refrigerant chamber, which is arranged around the outer periphery of the support shaft and has spray holes.

5. The snowflake machine according to claim 4, characterized in that, The outer periphery of the support shaft is provided with a pipe bracket to support and fix the nozzle.

6. The snowflake machine according to claim 4, characterized in that, The refrigerant input channel also includes a connecting pipe that runs through the refrigerant output channel and extends out of the refrigerant output channel to communicate with the nozzle.

7. The snowflake machine according to claim 6, characterized in that, The support shaft has a radial hole and an axial hole. Both ends of the radial hole are connected to the refrigerant cavity. One end of the axial hole is connected to the radial hole to form a refrigerant output channel. The other end of the axial hole is connected to the refrigerant circulation system. The connecting pipe extends out from the top of the radial hole.

8. The snowflake machine according to claim 1, characterized in that, The thickness of the aluminum alloy inner cylinder is greater than the thickness of the stainless steel outer cylinder.

9. The snowflake machine according to claim 1, characterized in that, The inner wall of the aluminum alloy inner cylinder is provided with multiple cooling ribs.

10. The snowflake machine according to claim 9, characterized in that, The cooling ribs extend axially along the inner aluminum alloy cylinder.

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