An evaporator for a continuous ice machine

Abstract

The utility model relates to the field of cotton ice machine, it includes pipeline, outer tube, inner tube and first, second protective sheath separately arranged in the both sides of outer tube. The pipeline is worn in the inner tube, and there is cavity between outer tube and inner tube. The pipeline contains outer, inner pipeline and first, second plugging device, and the inner pipeline is arranged in the outer pipeline, and both have ventilation gap and do not communicate with the inner pipeline lumen, and first, second plugging device separately arranges both ends of outer pipeline. The pipeline passes through first protective sheath, cavity, inner tube and then is lapped on second protective sheath. The outer pipeline wall of inner chamber has first air hole with ventilation gap communication, and second plugging device has second air hole and passageway with inner pipeline communication, and the outer pipeline on evaporimeter outside has third air hole with ventilation gap communication, and the inner pipeline one end has air outlet, and first plugging device is equipped with the air outlet ventilation passageway. The evaporimeter same side refrigerant inlet and outlet, the volume can be controlled to minimum, realizes and small -size motor matching, significantly reduces the overall volume of equipment, and keeps original heat exchange efficiency and system performance.

Description

Technical Field

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

[0002] Shaved ice machines utilize a rotating cylindrical evaporator to produce shaved ice. The rotating cylinder causes milk or flavoring liquid to adhere to its low-temperature outer surface and freeze into ice, which is then cut into shaved ice by a spatula. This allows for immediate consumption while retaining the texture of the milk. The core component, the rotating cylindrical evaporator, has a joint between its rotating cylinder and the central shaft that connects the inner cavity to the outside atmosphere. Addressing refrigerant leakage at this joint is a critical technical challenge during long-term start-up and shutdown operations. Research has found that when the machine is off, the high pressure and temperature inside the cavity make refrigerant prone to leakage; during operation, the negative pressure and low temperature inside the cavity allow outside air to easily enter. Solving the rotating seal problem of the evaporator under alternating operating conditions is a recognized industry challenge.

[0003] The following examples illustrate common problems with existing patents: In Chinese invention patent document CN106839555B, the stationary and rotating rings rely on contact to form a "dynamic sealing connection at the end face." Although high wear-resistant materials are commonly used, prolonged relative rotation and friction will cause wear on the end face, leading to seal failure. Furthermore, it requires high surface finish of the material, resulting in high component costs. The second and third sealing rings use modified rubber materials, but the "dynamic sealing connection" will wear due to rotational friction, leading to seal failure. The "spring-brake sealing ring" also fails to achieve satisfactory sealing under refrigerant pressure and rotational friction. In summary, this patent cannot achieve good and stable refrigerant sealing and cooling effects; it involves many components, requires high processing precision, and is difficult and costly to produce and assemble.

[0004] Chinese utility model patents, such as CN213273287U, employ dynamic and static sealing components made of PTFE sealing rings, oil seals, O-rings, or high-wear-resistant materials, relying on spring mechanisms to apply pressure or the elastic deformation of the sealing rings to achieve sealing. While these methods can achieve a certain sealing performance in the short term, leakage occurs over time due to rotational friction and wear. Furthermore, the structure requires an independent spring clamping device, high-precision machined graphene sealing rings, and a complex installation structure, resulting in numerous parts, complex assembly processes, increased costs, and high requirements for processing and assembly. This hinders industrial production, increases the risk of equipment failure, and reduces product reliability. Therefore, there is an urgent need for a durable, simple, reliable, inexpensive, and efficient drum evaporator structure. Utility Model Content

[0005] The purpose of this invention is to provide an evaporator for a shaved ice machine that delivers refrigerant from the same side. The above objectives are achieved in this way.

[0006] An evaporator for a shaved ice machine includes pipes, an outer cylinder, and an inner cylinder. A first protective sleeve and a second protective sleeve are respectively disposed on both sides of the outer cylinder. The pipes pass through and are fixedly mounted on the inner cylinder. A cavity is provided between the outer and inner cylinders, and an inner cavity is provided within the inner cylinder. The pipes include an outer pipe, an inner pipe, a first sealing device, and a second sealing device. The inner pipe is disposed inside the outer pipe. A venting gap is provided between the outer and inner pipes, and the venting gap is not connected to the cavity within the inner pipe. The first and second sealing devices are respectively disposed at both ends of the outer pipe. The pipes pass through... The first protective sleeve, cavity, and inner cylinder are then attached to the second protective sleeve. The outer pipe located in the inner cavity has a first vent hole on its pipe wall, which is connected to the vent gap. The second sealing device has a second vent hole and a second vent channel, which are connected to the inner pipe through the second vent channel. The outer pipe located outside the evaporator has a third vent hole on its pipe wall, which is connected to the vent gap. One end of the inner pipe has an outlet, and the first sealing device has a first vent channel, which is connected to the outlet.

[0007] The objective of this utility model can also be optimized by the following technical measures.

[0008] Preferably, the first vent is located in the inner cavity, and there are no fewer than two first vents, which are evenly distributed on the wall of the outer pipeline.

[0009] The evenly distributed design of the first vent holes allows for more uniform gas flow within the vent gap, preventing localized airflow obstruction. Multiple evenly distributed first vent holes allow gas to enter the vent gap from different locations, resulting in a more balanced gas pressure throughout the gap and ensuring normal gas circulation and heat exchange within the evaporator.

[0010] Preferably, the second sealing device extends out of the inner cylinder, passes through the cavity, and overlaps the second protective sleeve. The second vent hole and the second vent channel are both located in the second sealing device portion within the inner cavity.

[0011] Preferably, both the first protective sleeve and the second protective sleeve are provided with bearings, and the bearings are located on the same axis, with the pipeline mounted on the bearings.

[0012] The piping maintains stable concentricity during operation. Because the bearings inside the first and second protective sleeves are located on the same axis, the piping, mounted on these bearings, can rotate smoothly along this axis during evaporator assembly operation, reducing vibration and wear caused by poor concentricity. Simultaneously, the bearings provide excellent support for the piping, reducing the possibility of misalignment during operation and ensuring concentricity between the inner and outer cylinders.

[0013] Preferably, the first sealing device and the second sealing device are connected by threads at both ends of the external pipeline.

[0014] Threaded connections offer numerous advantages. Firstly, they provide reliable sealing, effectively preventing gas or liquid leakage from both ends of the external piping, ensuring the medium inside the evaporator assembly flows along its normal circulation path and maintaining the stability of the heat exchange process. Secondly, threaded connections facilitate installation and disassembly. When maintaining, repairing, or replacing parts of the evaporator assembly, workers can easily remove the first and second sealing devices from the external piping, improving work efficiency.

[0015] Preferably, the two ends of the inner pipeline are respectively connected to the first sealing device and the second sealing device.

[0016] The overlapping design ensures a stable connection between the inner piping and the first and second sealing devices. This helps to further ensure the accurate positioning of the inner piping within the evaporator assembly, thereby better achieving the concentricity requirements of the inner and outer cylinders. When both ends of the inner piping are stably overlapped with the sealing devices, the inner piping remains relatively fixed during evaporator assembly operation, reducing positional displacement caused by vibration or other external forces.

[0017] Preferably, a first sleeve is provided on the overlapping surface of the first sealing device and the inner pipeline, and a second sleeve is provided on the overlapping surface of the second sealing device and the inner pipeline, wherein the thickness of the first sleeve and the second sleeve is the same.

[0018] Preferably, a sealing ring is provided at the connection between the first sealing device, the second sealing device and the external pipeline, and a sealing ring is provided at the connection between the second sealing device and the internal pipeline.

[0019] During the operation of the evaporator assembly, refrigerant and other fluids flow in the internal and external piping. If the connections are not properly sealed, fluid leakage will occur, which will not only reduce the working efficiency of the evaporator assembly but may also cause a series of safety problems. By installing sealing rings at the connections between the first sealing device, the second sealing device and the external piping, and at the connection between the second sealing device and the internal piping, fluid leakage can be effectively prevented, ensuring the normal operation of the evaporator assembly.

[0020] Preferably, the outer cylinder wall is provided with an injection port, the injection port is connected to the inner cavity, and the injection port is provided with a sealing plug to seal the injection port.

[0021] Preferably, a sealing ring is provided at the connection between the first protective sleeve and the bearing.

[0022] By adopting the above technical solution, this utility model optimizes the system layout structure by using refrigerant input and output on the same side. This arrangement not only simplifies pipe connections but, more importantly, allows for a more compact design of the second protective sleeve. Through this optimized design, the volume of the second protective sleeve can be kept to a minimum, thus achieving efficient matching with small motors. This structural improvement significantly reduces the overall size of the entire device, improving space utilization and enhancing portability and installation flexibility, making it particularly suitable for space-constrained installation environments. Simultaneously, this design maintains the original heat exchange efficiency and system performance, truly achieving a reduction in size without compromising product functionality. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the present invention.

[0024] Figure 2 This is a cross-sectional view of the present invention.

[0025] Figure 3 This is an enlarged view of part A of this utility model.

[0026] Figure 4 This is an enlarged view of part B of the present invention.

[0027] Figure 5 This is a cross-sectional view of another embodiment of the present invention.

[0028] Figure 6 This is an exploded view of the parts of this utility model.

[0029] In the diagram: Outer cylinder 1, Inner cylinder 2, Inner cavity 3, First protective sleeve 4, Second protective sleeve 5, Transmission position 51, Outer pipeline 6, First vent 61, Third vent 62, Annular stop block 63, Inner pipeline 7, First sealing device 8, First ventilation channel 81, First sleeve 82, Second sealing device 9, Second vent 91, Second ventilation channel 92, Second sleeve 93, Step surface 94, Cavity 1a, Vent gap 2a, Sealing ring 3a, Bearing 4a, Protective sleeve bearing 5a, Filling port 6a, Sealing plug 7a, Sealing ring 8a, Sealing ring 9a Detailed Implementation

[0030] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0031] Combination Figures 1 to 6 An evaporator for a shaved ice machine includes pipes, an outer cylinder 1, and an inner cylinder 2. A first protective sleeve 4 and a second protective sleeve 5 are respectively disposed on both sides of the outer cylinder 1. The pipes include an outer pipe 6, an inner pipe 7, a first sealing device 8, and a second sealing device 9. The pipes pass through the inner cylinder 2, and the outer wall of the outer pipe 6 is fixedly connected to the wall of the inner cylinder 2 by welding. The inner cylinder 2 has an inner cavity 3, and a cavity 1a is provided between the outer cylinder 1 and the inner cylinder 2. The cavity 1a is filled with cryogenic thermally conductive silicone grease or a refrigerant, which serves as a heat transfer medium between the outer cylinder 1 and the inner cylinder 2, improving the heat transfer efficiency between them.

[0032] Combination Figure 2 and Figure 6 The inner pipe 7 is located inside the outer pipe 6. A ventilation gap 2a is provided between the outer pipe 6 and the inner pipe 7. The ventilation gap 2a is not connected to the cavity 71 inside the inner pipe 7. The first sealing device 8 and the second sealing device 9 are respectively located at both ends of the outer pipe 6. The first sealing device 8 is provided with a first sleeve 82, and the second sealing device 9 is provided with a second sleeve 93. The first sleeve 82 and the second sleeve 93 are respectively inserted into both ends of the outer pipe 6. Both ends of the inner pipe 7 overlap the first sleeve 82 and the second sleeve 93 respectively. The first sleeve 82 and the second sleeve 93 have the same thickness. When the inner pipe 7 overlaps the first sleeve 82 and the second sleeve 93, it is aligned with the axis of the outer pipe 6. The first sealing device 8 and the outer pipe 6 are respectively provided with threaded features at their respective ports. The first sealing device 8 is connected to the port of the outer pipe 6 through the threaded features. The second sealing device 9 and the other port of the outer pipe 6 are respectively provided with threaded features. The second sealing device 9 is connected to the other port of the outer pipe 6 through the threaded features. In some embodiments, the first sealing device 8, the second sealing device 9 and the outer pipe 6 are manufactured as a single piece, or the first sealing device 8, the second sealing device 9 and the outer pipe 6 are welded together to seal them using a welding process.

[0033] Combination Figure 2 and Figure 6The pipeline passes through the first protective sleeve 4, cavity 1a, and inner cylinder 2 in sequence and then overlaps the second protective sleeve 5. The second sealing device 9 extends out from the inner cylinder 2, passes through the cavity 1a, and overlaps the second protective sleeve 5. Both the first protective sleeve 4 and the second protective sleeve 5 are provided with bearings 4a. In this embodiment, each end of the first protective sleeve 4 is provided with a bearing 4a. A sealing ring 3a is provided at the contact position between the bearing 4a and the end face of the first protective sleeve 4. The end face of the second protective sleeve 5 near the inner cylinder 2 is provided with a bearing 4a. The second sealing device 9 overlaps the bearing 4a provided in the second protective sleeve 5. All bearings 4a are located on the same axis, and the pipeline is mounted on the bearing 4a.

[0034] Combination Figure 2 and Figure 3 To ensure the bearing 4a operates within the first protective sleeve 4 and the second protective sleeve 5, an annular stop 63 is provided on the wall of the outer pipeline 6. The annular stop 63 is located in the portion of the pipeline within the cavity 1a, and it limits the bearing 4a located inside the first protective sleeve 4. The second sealing device 9 has a stepped surface 94, which also limits the bearing 4a located inside the second protective sleeve 5. The outer surface of the second protective sleeve has a transmission position 51 for connection with the motor. In this embodiment, the first protective sleeve 4, the second protective sleeve 5, and the outer cylinder 1 are integrally formed. In some embodiments, the first protective sleeve 4, the second protective sleeve 5, and the outer cylinder 1 are detachably formed. Protective sleeve bearings are provided on the first and second protective sleeves. The size and axis of the protective sleeve bearings are consistent. At least one protective sleeve bearing is provided on each of the first and second protective sleeves, and the number of protective sleeve bearings varies depending on the production plan.

[0035] Combination Figure 2 and Figure 6 A sealing ring 3a is provided at the connection between the first protective sleeve 4 and the bearing 4a. Sealing rings 8a and 3a are respectively provided at the connections between the first sealing device 8 and the second sealing device 9 and the external pipeline 6, and a sealing ring 9a is provided at the connection between the second sealing device 9 and the internal pipeline 7.

[0036] Combination Figure 2 The outer pipe 6 located in the inner cavity 3 has a first vent hole 61 on its pipe wall. The first vent hole 61 communicates with the vent gap 2a. The first vent hole 61 is located in the part of the outer pipe 6 located in the inner cavity 3. There are no less than two first vent holes 61. The first vent holes 61 are evenly distributed on the pipe wall of the outer pipe 6. The diameter, number and location of the first vent holes 61 can be changed according to production needs.

[0037] Combination Figure 2 and Figure 4The second sealing device 9 is provided with a second vent hole 91 and a second vent channel 92. The second vent hole 91 and the second vent channel 92 are both provided with the second sealing device 9 in the part located in the inner cavity 3. The second vent hole 91 is connected to the inner pipe 7 through the second vent channel 92. The outer pipe 6 located outside the evaporator is provided with a third vent hole 62 on its pipe wall. The third vent hole 62 is connected to the vent gap 2a. One end of the inner pipe 7 is provided with an air outlet. The first sealing device 8 is provided with a first vent channel. The vent channel is connected to the air outlet.

[0038] Combination Figure 2 The first vent 61 is connected to the vent gap 2a. The second sealing device 9 is provided with a second vent 91 and a second vent channel 92. The second vent 91 is connected to the inner pipe 7 through the second vent channel 92. The outer pipe 6 located outside the evaporator is provided with a third vent 62 on its wall. The third vent 62 is connected to the vent gap 2a. One end of the inner pipe 7 is provided with an air outlet. The first sealing device 8 is provided with a first vent channel, which is connected to the air outlet.

[0039] Combination Figure 5 In some embodiments, the outer cylinder 1 has an injection port 6a on its wall, the injection port 6a is connected to the inner cavity 3, and the injection port 6a is provided with a sealing plug 7a to seal the injection port 6a.

[0040] Specific implementation process: The two ends of the outer pipe 6 are sealed to the two ends of the inner pipe 7, and a venting gap 2a is formed between the outer pipe 6 and the inner pipe 7. The refrigerant enters the venting gap 2a through the third vent 62 of the outer pipe 6, and enters the inner cavity 3 through the first vent 61. The refrigerant absorbs heat, causing the temperature of the inner cylinder 2 to drop rapidly. The low temperature is transferred to the surface of the outer cylinder 1 through deep cryogenic thermal conductive silicone grease or refrigerant, causing ice to form on the surface of the outer cylinder 1. After absorbing heat and vaporizing, the refrigerant enters the inner pipe 7 through the second vent 91 and the second venting channel 92, and flows out through the first venting channel. It is circulated and compressed by the compressor, and heat exchange is carried out in a cyclical manner. In the field of shaved ice machines, the shaved ice machine is equipped with a corresponding mounting platform for the rolling evaporator. How to install the rolling evaporator in the shaved ice machine is existing technology in the industry, and the specific technical details will not be elaborated here.

[0041] After the base of this utility model is installed inside the shaved ice machine, the bearing 5a is rotatably mounted on the base. The evaporator is driven to rotate by the motor at the transmission position 51. Since the welded part consisting of the first sealing device 8, the second sealing device 9, the outer pipe 6, the inner pipe 7 and the inner cylinder 2 does not participate in the rotation, the possibility of refrigerant leakage caused by wear, aging or deformation of the sealing material when using sealing rings or graphite rings is effectively solved. The motor drives the outer cylinder 1 to rotate through the transmission position 51.

[0042] The above are preferred embodiments of this utility model. It should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications are also considered to be within the protection scope of this utility model.

Claims

1. An evaporator for a shaved ice machine, comprising pipes, an outer cylinder, and an inner cylinder, with a first protective sleeve and a second protective sleeve respectively disposed on both sides of the outer cylinder, the pipes passing through and fixedly disposed on the inner cylinder, a cavity being provided between the outer cylinder and the inner cylinder, and an inner cavity being provided inside the inner cylinder, characterized in that: The pipeline includes an outer pipeline, an inner pipeline, a first sealing device, and a second sealing device. The inner pipeline is located inside the outer pipeline, and a venting gap is provided between the outer and inner pipelines. The venting gap is not connected to the cavity inside the inner pipeline. The first and second sealing devices are respectively located at both ends of the outer pipeline. The pipeline passes through a first protective sleeve, a cavity, and an inner cylinder in sequence before overlapping onto a second protective sleeve. The outer pipeline has a first vent hole on its wall in the portion located in the inner cavity, which communicates with the venting gap. The second sealing device has a second vent hole and a second venting channel. The second vent hole communicates with the inner pipeline through the second venting channel. The outer pipeline has a third vent hole on its wall in the portion located outside the evaporator, which communicates with the venting gap. One end of the inner pipeline has an outlet. The first sealing device has a first venting channel, which communicates with the outlet.

2. The evaporator of the shaved ice machine according to claim 1, characterized in that: The first vent is located in the inner cavity, and there are no fewer than two first vents. The first vents are evenly distributed on the wall of the outer pipeline.

3. The evaporator of the shaved ice machine according to claim 1, characterized in that: The second sealing device extends out from the inner cylinder, passes through the cavity, and overlaps the second protective sleeve. The second vent hole and the second vent channel are both located in the second sealing device section within the inner cavity.

4. The evaporator of the shaved ice machine according to claim 1, characterized in that: Both the first and second protective sleeves are equipped with bearings, which are located on the same axis, and the pipeline is mounted on the bearings.

5. The evaporator of the shaved ice machine according to claim 1, characterized in that: The first sealing device and the second sealing device are installed at both ends of the external pipeline by means of threaded connection or welding.

6. The evaporator of the shaved ice machine according to claim 1, characterized in that: The two ends of the internal pipeline are respectively connected to the first sealing device and the second sealing device.

7. The evaporator of the shaved ice machine according to claim 1, characterized in that: A first sleeve is provided on the overlapping surface of the first sealing device and the inner pipeline, and a second sleeve is provided on the overlapping surface of the second sealing device and the inner pipeline. The first sleeve and the second sleeve have the same thickness.

8. The evaporator of the shaved ice machine according to claim 1, characterized in that: The first and second sealing devices are provided with sealing rings at the connection points with the external pipeline, and the second sealing device is provided with a sealing ring at the connection point with the internal pipeline.

9. The evaporator of the shaved ice machine according to claim 1, characterized in that: The outer cylinder wall is provided with an injection port, which is connected to the inner cavity. A sealing plug is provided on the injection port to seal the injection port.

10. The evaporator of the shaved ice machine according to claim 1, characterized in that: A sealing ring is provided at the connection between the first protective sleeve and the bearing.

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