An evaporator for a shaved ice machine and the shaved ice machine thereon

Abstract

This utility model relates to the field of shaved ice machine technology, specifically to an evaporator for a shaved ice machine, comprising a cylinder, an inlet pipe and an outlet pipe on the cylinder, one end of the inlet pipe being located inside the inner cavity of the cylinder, and the other end being used to connect to the liquid outlet of the refrigeration system, and one end of the outlet pipe communicating with the inner cavity of the cylinder, and the other end being used to connect to the outlet of the refrigeration system; a roller is rotatably fitted outside the cylinder. The evaporator and shaved ice machine provided by this utility model, through the direct rotational cooperation structure of the cylinder and the roller, eliminate the need for the traditional complex main shaft sealing device, effectively preventing refrigerant leakage while reducing machining precision, and has the advantages of simplified structure, reliable sealing performance and low manufacturing cost.

Description

Technical Field

[0001] This utility model relates to the field of shaved ice machine technology, and specifically to an evaporator for a shaved ice machine and the shaved ice machine thereof. Background Technology

[0002] As an ice-making device, the most crucial component of a slush ice machine is the evaporator. Existing evaporators suffer from complex structures, poor sealing performance, and numerous technical defects. Taking Chinese patent CN216620356U as an example, it employs a multi-component combination structure including a rotating drum, main shaft tube, high-pressure tube, and low-pressure tube, achieving sealing between the rotating drum and main shaft tube through a mechanical seal. This structure has significant shortcomings in practical use: First, due to the high refrigerant pressure in the refrigeration system, the sealing structure at the rotating drum shaft needs to withstand high pressure, requiring extremely high precision in parts processing, resulting in high production costs; second, the seals are prone to wear during long-term operation, causing refrigerant leakage, which not only affects the equipment's lifespan but also leads to frequent malfunctions. These problems severely restrict the reliability and lifespan of slush ice machines. Utility Model Content

[0003] The purpose of this utility model is to provide an evaporator and a slush ice machine, which have the advantages of simplified structure, reliable sealing performance and low manufacturing cost.

[0004] This utility model provides an evaporator for a slush ice machine, including a cylinder with an inlet pipe and an outlet pipe. One end of the inlet pipe is located inside the inner cavity of the cylinder, and the other end is used to connect to the liquid outlet of the refrigeration system. One end of the outlet pipe is connected to the inner cavity of the cylinder, and the other end is used to connect to the outlet of the refrigeration system. A roller is rotatably fitted outside the cylinder. The cylinder includes an inner ring and a left side wall and a right side wall of the inner ring connected to both ends of the inner ring. The roller includes an outer ring and a left side wall and a right side wall of the outer ring connected to both ends of the outer ring. The outer wall of the inner ring contacts and rotates with the inner wall of the outer ring.

[0005] Furthermore, this utility model also proposes that a cylindrical limiting block is provided at the center of the right side wall of the inner ring, and a through hole is provided in the cylindrical limiting block to connect the inner cavity with the outside, through which the liquid inlet pipe and the air outlet pipe are set.

[0006] Furthermore, this utility model also proposes that a right support column is provided on the right side wall of the outer ring, and an installation through hole is provided in the right support column, with the cylinder limiting block cooperating to pass through the installation through hole.

[0007] Furthermore, this utility model also proposes that the cylinder limiting block and the inner wall of the mounting through hole are provided with oil seals.

[0008] Furthermore, this utility model also proposes that a left support column is provided on the left side wall of the outer ring, and the right support column and the left support column are symmetrically arranged, and both the right support column and the left support column are provided with mounting positions.

[0009] Furthermore, this utility model also proposes that a drive shaft mounting hole be provided on the outer end of the left support column.

[0010] Furthermore, this utility model also proposes a snow ice machine, including a frame and a drive device mounted on the frame, including the aforementioned evaporator. Bearings are fitted on two mounting positions on the right and left support columns, and the evaporator assembly is horizontally mounted on the frame through the two bearings. The drive device drives the drum to rotate. The cylinder limiting block is fixedly connected to the frame by passing through the mounting through hole.

[0011] Furthermore, this utility model also proposes that the drive shaft of the drive device is fitted into the drive shaft mounting hole so that the drive device drives the roller to rotate relative to the cylinder through the left support column.

[0012] As can be seen from the above, the evaporator and slush ice machine provided by this utility model, through the direct rotational cooperation structure of the cylinder and the drum, eliminate the traditional complex main shaft sealing device, effectively preventing refrigerant leakage while reducing machining accuracy, and has the advantages of simplified structure, reliable sealing performance and low manufacturing cost. Attached Figure Description

[0013] Figure 1 This is a cross-sectional view of the evaporator assembly of this utility model;

[0014] Figure 2 This is a schematic diagram of the structure of the snow ice machine of this utility model.

[0015] In the picture:

[0016] 1. Cylinder; 11. Inner ring; 12. Left side wall of inner ring; 13. Right side wall of inner ring; 14. Cylinder limiting block; 15. Inner cavity; 16. Through hole; 2. Roller; 21. Outer ring; 22. Left side wall of outer ring; 23. Right side wall of outer ring; 24. Left support column; 25. Drive shaft mounting hole; 26. Mounting position; 27. Right support column; 28. Mounting through hole; 3. Oil seal; 4. Liquid inlet pipe; 5. Air outlet pipe; 6. Drive shaft; 7. Bearing; 8. Frame. Detailed Implementation

[0017] The technical solution of this utility model will be described below with reference to the accompanying drawings and embodiments.

[0018] In existing technologies, the evaporator of shaved ice machines generally adopts a structure where a rotating drum and a main shaft tube are fitted together. The inside of the rotating drum needs to withstand the high-pressure refrigerant of the refrigeration system, making the dynamic seal between the rotating drum and the main shaft tube a key challenge. Traditional technologies maintain sealing by setting up multiple layers of mechanical seals and precision-fitting parts, but these seals are prone to wear after long-term operation, leading to an increased risk of refrigerant leakage. This structure is not only costly to manufacture but also requires frequent maintenance, severely limiting the lifespan of the equipment.

[0019] To address the aforementioned problems, the inventors of this invention noted that the relative motion between the rotating drum and the main shaft tube was the root cause of seal failure. Through repeated experiments, they discovered that if the refrigerant circulation path could be completely fixed, physically isolating the rotating and stationary components, the need for dynamic sealing could be fundamentally eliminated. Based on this idea, the inventors attempted to decompose the evaporator into independent inner and outer double-ring structures, replacing the traditional pipeline delivery method with contact-type heat conduction.

[0020] like Figure 1 As shown, this utility model proposes a cylindrical body 1, on which a liquid inlet pipe 4 and an air outlet pipe 5 are provided. One end of the liquid inlet pipe 4 is located inside the inner cavity 15 of the cylindrical body 1, and the other end is connected to the liquid outlet of the refrigeration system. One end of the air outlet pipe 5 is connected to the inner cavity 15, and the other end is connected to the air inlet of the refrigeration system. A roller 2 is rotatably fitted around the cylindrical body 1. The cylindrical body 1 includes an inner ring 11 and an inner ring left side wall 12 and an inner ring right side wall 13 connected to its two ends. The roller 2 includes an outer ring 21 and an outer ring left side wall 22 and an outer ring right side wall 23 connected to its two ends. The outer wall of the inner ring 11 contacts and rotates with the inner wall of the outer ring 21.

[0021] In this invention, the cylinder 1 refers to the stationary component that carries the refrigerant circulation, specifically an aluminum alloy cylindrical structure, with its inner cavity 15 forming a closed refrigerant flow channel. The roller 2 refers to the rotating component wrapped around the cylinder 1, specifically made of stainless steel, which transfers cooling capacity through rotatable contact between the inner wall of the outer ring 21 and the inner ring 11. The rotational engagement between the inner ring 11 and the outer ring 21 means that their contact surfaces maintain a sliding contact state. The fixed installation of the liquid inlet pipe 4 and the gas outlet pipe 5 means that the pipes are completely integrated into the cylinder 1, specifically through welding or threaded connection to form a permanent seal with the cylinder 1.

[0022] Specifically, after the refrigerant enters the inner cavity 15 of the cylinder 1 through the liquid inlet pipe 4, a low-temperature region is formed on the wall of the cylinder 1. The roller 2, which is fitted outside the cylinder 1, conducts heat through the contact surface between the inner ring 11 and the outer ring 21, thus reducing the temperature of the outer surface of the roller 2. When the roller 2 is driven to rotate, the heat exchange process between its outer surface and the external environment continues. Since the refrigerant circulation path is completely confined inside the stationary cylinder 1, the rotating parts do not need to be equipped with through pipes, completely eliminating the need for dynamic sealing at the shaft. The contact fit between the inner ring 11 and the outer ring 21 replaces the traditional spindle structure.

[0023] Compared to existing technologies, traditional solutions involve installing a main shaft tube and mechanical seal structure at the end of the rotating drum, which must withstand the dual effects of refrigerant pressure and rotational motion. This invention transforms the high-pressure seal into a static seal by separating the stationary refrigerant channel from the rotating heat transfer components.

[0024] Through the above technical solution, this utility model effectively eliminates the dynamic sealing structure at the rotating shaft, reducing the precision requirements for parts machining. The refrigerant circulation system is fully integrated within the stationary cylinder 1, avoiding wear at the connection points between rotating parts and pipes. The contact-type heat transfer structure of the inner ring 11 and outer ring 21 simplifies mechanical complexity and extends the service life of the equipment.

[0025] This utility model further proposes to set a cylinder limiting block 14 at the center of the right side wall 13 of the inner ring, and to set a through hole 16 in the cylinder limiting block 14 to connect the inner cavity 15 with the outside. The liquid inlet pipe 4 and the air outlet pipe 5 are set through the through hole 16.

[0026] The inner ring right side wall 13 refers to the closed end face on the right side of the cylinder 1. Specifically, it can be made by welding an annular metal plate or integrally forming it at the end of the inner ring 11, forming a sealed boundary for the inner cavity of the cylinder. The cylinder limiting block 14 refers to the protruding structure located at the center of the inner ring right side wall 13. The through hole 16 refers to the axial channel penetrating the cylinder limiting block 14. Specifically, it can be formed into a circular channel by machining, and its diameter can be set to be slightly larger than the outer diameter of the outlet pipe 5. It is used to centrally arrange the refrigerant delivery pipeline, and the inner wall of the through hole 16 forms a sealing structure with the outlet pipe 5 to prevent refrigerant leakage.

[0027] Specifically, the cylinder limiting block 14, through the through hole 16, changes the installation position of the liquid inlet pipe 4 and the gas outlet pipe 5 from a dynamic connection at the end of the traditional rotating drum to a static fixation on the side wall of the cylinder 1. After the refrigerant is directly injected into the inner cavity 15 of the cylinder 1 through the liquid inlet pipe 4, the gas produced by evaporation is discharged through the gas outlet pipe 5. The entire process requires no relative movement between the pipelines and the rotating components. The mating structure between the cylinder limiting block 14 and the right support column 27 creates axial positioning between the cylinder 1 and the drum 2, preventing axial movement during rotation. The fixed arrangement of the liquid inlet pipe 4 and the gas outlet pipe 5 within the through hole 16 eliminates the need for multiple layers of sealing components at the end of the rotating drum in traditional structures.

[0028] This utility model further proposes that a right support column 27 is provided on the right side wall 23 of the outer ring, and an installation through hole 28 is provided in the right support column 27. The cylinder limiting block 14 is set to pass through the installation through hole 28.

[0029] The right support column 27 is a columnar support structure integrally formed with the right side wall 23 of the outer ring. It can be formed by welding or casting cylindrical metal components and is used to bear the axial load when the roller 2 rotates and to achieve positioning and fit with the cylinder 1. The mounting through hole 28 is a circular channel that passes through the central area of ​​the right support column 27. It can be formed by machining and its inner diameter is slightly larger than the outer diameter of the cylinder limiting block 14, forming a clearance fit assembly relationship.

[0030] Specifically, when the roller 2 rotates around the cylinder 1, the right support column 27 forms an annular covering structure on the cylinder limiting block 14 through the mounting through hole 28. After the cylinder limiting block 14 passes through the mounting through hole 28, its end is fixed to the frame by fasteners, forming an axial constraint.

[0031] This utility model further proposes a technical solution of setting an oil seal 3 on the inner wall of the cylinder limiting block 14 and the mounting through hole 28.

[0032] Among them, oil seal 3 refers to an annular seal made of elastic material. The elastic deformation capacity of the oil seal can compensate for the axial displacement and radial runout generated during rotation, while its wear-resistant properties can reduce frictional loss at the sealing interface.

[0033] Specifically, the oil seal 3 is press-fitted into the annular groove on the inner wall of the mounting through hole 28, and its sealing lip forms an interference fit with the outer surface of the cylinder limiting block 14. When the drum 2 rotates, the oil seal maintains the contact pressure with the cylinder limiting block through elastic deformation, forming a dynamic sealing interface to prevent external moisture from entering the rotating mating area.

[0034] This utility model further proposes to provide a left support column 24 on the left side wall 22 of the outer ring, and to provide a right support column 27 and a left support column 24 symmetrically arranged, with an installation position 26 provided on both the right support column 27 and the left support column 24.

[0035] The left support column 24 refers to a columnar support structure fixed to the left side wall 22 of the outer ring. It can be implemented by welding or bolting cylindrical metal components, and is used to form a symmetrical support system with the right support column 27. The mounting position 26 refers to the standardized assembly interface set at the end of the support column, which is used to adapt to the positioning and installation of the bearing 7, and to ensure the coaxial rotation accuracy of the roller 2.

[0036] Specifically, the left support column 24 added to the left side wall 22 of the outer ring and the right support column 27 on the right side form a symmetrical support structure, so that the radial load when the roller 2 rotates is evenly distributed on the support columns on both sides. The symmetrical support system reduces the mechanical stress borne by the sealing structure, while the uniform specifications of the mounting position 26 simplify the assembly process of the bearing 7 and avoid aggravated wear of the sealing surface due to installation errors.

[0037] This utility model further proposes that the outer end of the left support column 24 is provided with a drive shaft mounting hole 25.

[0038] The drive shaft mounting hole 25 refers to the shaft hole structure set on the outer end face of the left support column 24. It can be achieved by drilling or turning and is used to directly accommodate the drive shaft 6 of the drive device.

[0039] Specifically, the drive shaft mounting hole 25 and the left support column 24 form an integrated structure, allowing the drive shaft 6 of the drive unit to be directly inserted into the hole for power transmission. Since the drive connection point is located on the outside of the support column, there is no need to install a main shaft tube and matching sealing structure at the end of the rotating drum, thus avoiding the sealing requirements of the transmission components under high-pressure refrigerant conditions. The combined structure of the left support column 24 and the drive shaft mounting hole 25 integrates the transmission and support functions, eliminating the multiple sealing interfaces between the rotating seat and the main shaft tube in traditional technologies, fundamentally reducing the possibility of seal failure.

[0040] like Figure 2 As shown, this utility model further proposes a snow ice machine, including an evaporator. Bearings 7 are fitted on two mounting positions 26 on the right support column 27 and the left support column 24. The evaporator is horizontally mounted on the frame 8 through the two bearings 7. The drive device drives the drum 2 to rotate. The cylinder limiting block 14 cooperates to pass through the mounting through hole 28 and is fixedly connected to the frame 8.

[0041] Specifically, two bearings 7 are respectively installed on mounting positions 26 of the left support column 24 and the right support column 27, forming a horizontal support structure that suspends the evaporator entirely inside the frame 8. The drive unit is connected to the drive shaft mounting hole 25 of the left support column 24 via a coupling, outputting power to drive the drum 2 to rotate around the axis of the cylinder 1. After the cylinder limiting block 14 passes through the mounting through hole 28 of the right support column, it is rigidly connected to the frame 8 by bolts, keeping the cylinder 1 stationary. When the drum 2 rotates, its outer ring 21 forms a dynamic mating surface with the inner ring of the cylinder 11. The pressure generated by the refrigerant flowing in the inner cavity 15 of the cylinder 1 is directly transmitted to the frame 8 through the stationary cylinder, avoiding the high-pressure sealing load on the rotating parts in the traditional rotating shaft structure. The refrigerant pipeline is fixedly connected through the through hole 16 inside the cylinder limiting block 14, eliminating the wear of the sealing interface caused by the movement of the pipeline with the rotating parts.

[0042] Through the above technical solution, this utility model effectively solves the problems of high manufacturing cost and easy wear of seals caused by the complex sealing structure at the junction of the rotating drum and the main shaft tube. The rigid connection between the cylinder 1 and the frame 8 keeps the refrigerant pipeline in a static state, eliminating the need for dynamic sealing at the pipeline connection and extending the service life of the seals.

[0043] This utility model further proposes that the drive shaft 6 of the drive device is fitted with the drive shaft mounting hole 25 so that the drive device drives the roller 2 to rotate relative to the cylinder 1 through the left support column 24.

[0044] The embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present invention without departing from the spirit and scope of the claims, and all of these forms are within the scope of protection of the present invention.

Claims

1. An evaporator for a shaved ice machine, characterized in that: Includes a cylinder (1), on which a liquid inlet pipe (4) and an air outlet pipe (5) are provided. One end of the liquid inlet pipe (4) is located in the inner cavity (15) of the cylinder (1), and the other end of the liquid inlet pipe (4) is used to connect to the liquid outlet of the refrigeration system. One end of the air outlet pipe (5) is connected to the inner cavity (15) of the cylinder (1), and the other end of the air outlet pipe (5) is used to connect to the air outlet of the refrigeration system. A roller (2) is rotatably fitted outside the cylinder (1). The cylinder (1) includes an inner ring (11) and an inner ring left side wall (12) and an inner ring right side wall (13) connected to both ends of the inner ring (11); the roller (2) includes an outer ring (21) and an outer ring left side wall (22) and an outer ring right side wall (23) connected to both ends of the outer ring (21). The outer wall of the inner ring (11) is in contact with and rotates with the inner wall of the outer ring (21).

2. The evaporator of a shaved ice machine according to claim 1, characterized in that: The inner ring right side wall (13) is provided with a cylinder limiting block (14) at the center. The cylinder limiting block (14) is provided with a through hole (16) connecting the inner cavity (15) and the outside. The liquid inlet pipe (4) and the air outlet pipe (5) are provided through the through hole (16).

3. The evaporator of a shaved ice machine according to claim 2, characterized in that: The outer ring right side wall (23) is provided with a right support column (27), and the right support column (27) is provided with an installation through hole (28). The cylinder limiting block (14) is set to pass through the installation through hole (28).

4. The evaporator of a shaved ice machine according to claim 3, characterized in that: Oil seals (3) are provided on the inner walls of the cylinder limiting block (14) and the mounting through hole (28).

5. The evaporator of a shaved ice machine according to claim 3, characterized in that: The left side wall (22) of the outer ring is provided with a left support column (24), the right support column (27) and the left support column (24) are symmetrically arranged, and the right support column (27) and the left support column (24) are provided with mounting positions (26).

6. The evaporator of a shaved ice machine according to claim 5, characterized in that: The left support column (24) has a drive shaft mounting hole (25) on its outer end.

7. A shaved ice machine, comprising a frame (8) and a drive device disposed on the frame (8), characterized in that: The evaporator as described in claim 6 is provided with bearings (7) on two mounting positions (26) on the right support column (27) and the left support column (24). The evaporator assembly is horizontally mounted on the frame (8) by the two bearings (7). The driving device drives the roller (2) to rotate. The cylinder limiting block (14) is fixedly connected to the frame (8) by passing through the mounting through hole (28).

8. A shaved ice machine according to claim 7, characterized in that: The drive shaft (6) of the drive device is fitted into the drive shaft mounting hole (25) so that the drive device drives the roller (2) to rotate relative to the cylinder (1) through the left support column (24).

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