A tubular structure, an evaporator, and a snow melting machine

Abstract

This utility model discloses a tubular structure, an evaporator cylinder, and a refrigerant melting machine. The outer surface of the tubular structure has an outwardly protruding spiral protrusion, and the portion of the outer surface other than the spiral protrusion forms a spiral concave portion. Each end of the spiral concave portion has a through hole. The two ends of the spiral protrusion are respectively close to the two ends of the outer surface, and the axial distance between the two ends of the spiral protrusion is less than the axial distance between the two ends of the spiral concave portion. When the tubular structure is configured as the inner cylinder of the evaporator cylinder, the refrigerant flow channel formed on the outer wall of the tubular structure can be completely filled with refrigerant, and the two ends of the spiral protrusion are completely immersed in the refrigerant. This tubular structure, when used as the inner cylinder of the evaporator cylinder, allows the refrigerant to completely cover the flow channel on its outer surface, eliminating cooling dead zones.

Description

Technical Field

[0001] This utility model relates to the field of evaporator equipment technology, and in particular to a tubular structure, an evaporation cylinder and a snow melting machine. Background Technology

[0002] Existing evaporators for snow melting machines (such as the published patent 202121653907.X) mostly adopt a shell-and-tube structure, with inwardly recessed spiral grooves on the inner cylinder sidewalls to guide refrigerant flow. However, this design creates cooling dead zones in the refrigerant flow channel, resulting in suboptimal heat exchange efficiency in the evaporator cylinder. Utility Model Content

[0003] The main purpose of this invention is to provide a tubular structure, an evaporator cylinder, and a snow melting machine, aiming to solve the problem of cooling dead zones in the refrigerant flow channel and optimize the heat exchange efficiency of the evaporator cylinder.

[0004] To achieve the above-mentioned utility model objectives, the first aspect of this utility model proposes a tubular structure, an evaporation cylinder, and a snow melting machine. The outer side of the tubular structure is provided with an outwardly protruding spiral protrusion, and the portion of the outer side other than the spiral protrusion forms a spiral recess. Each end of the spiral recess is provided with a through hole. The spiral protrusion is either a continuous spiral protrusion or a spiral protrusion formed by at least two spiral protrusions arranged with their ends spaced apart.

[0005] If the spiral protrusion is a continuous spiral protrusion, then the first and last ends of the spiral protrusion are close to the two ends of the outer side, and the axial distance between the first and last ends of the spiral protrusion is less than the axial distance between the first and last ends of the spiral concave part; if the spiral protrusion is a spliced ​​spiral protrusion formed by arranging at least two spiral protrusions at intervals, then the first and last ends of the spiral protrusion are close to the two ends of the outer side, and the axial distance between the first and last ends of the spliced ​​spiral protrusion is less than the axial distance between the first and last ends of the spiral concave part.

[0006] When the tubular structure is configured as the inner cylinder of the evaporator, the refrigerant flow channel formed on the outer wall of the tubular structure can be completely filled with refrigerant, and the beginning and end ends of the spiral protrusion are completely immersed in the refrigerant.

[0007] Furthermore, the tubular structure is a one-piece molded structure.

[0008] Furthermore, the cross-section of the spiral protrusion is semi-circular.

[0009] Furthermore, the maximum width of the last recess at the beginning or end of the spiral recess is greater than 1.5 times the width of the groove of the spiral protrusion.

[0010] Furthermore, the helix angle of the helical protrusion is 10°-30°.

[0011] Furthermore, the tubular structure is made of any one of stainless steel, copper, aluminum, or aluminum alloy.

[0012] This utility model also protects an evaporation cylinder, which uses the aforementioned tubular structure as the inner cylinder of the evaporation cylinder;

[0013] The evaporation cylinder also includes:

[0014] The outer cylinder is coaxially sleeved on the outside of the inner cylinder and is interference-fitted with the inner cylinder so that the spiral protrusion of the inner cylinder and the inner wall of the outer cylinder form a spiral flow channel, i.e., a refrigerant flow channel. The refrigerant flow channel can be completely filled with refrigerant, thereby eliminating the cooling dead angles at both ends of the evaporator cylinder.

[0015] The two through holes on the inner cylinder are respectively connected to the refrigerant inlet pipe and the refrigerant outlet pipe.

[0016] Furthermore, the highest point of the spiral protrusion of the inner cylinder abuts against the inner wall of the outer cylinder.

[0017] Furthermore, the highest point of the spiral protrusion of the inner cylinder forms an interference fit with the inner wall of the outer cylinder.

[0018] Furthermore, the inner cylinder and the outer cylinder are sealed at their end faces by end flanges, and the end flanges are fixedly connected to the end faces of the outer cylinder.

[0019] The outer cylinder is made of any one of stainless steel, copper, aluminum, or aluminum alloy.

[0020] This utility model also protects a snow melting machine, including the aforementioned evaporation cylinder.

[0021] The present invention has the following advantages over the prior art:

[0022] The tubular structure, evaporator, and snow melting machine of this utility model, wherein when the tubular structure is used as the inner cylinder of the evaporator, the refrigerant can be fully covered in the flow channel on its outer side, eliminating cooling dead zones. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of a tubular structure according to an embodiment of the present invention;

[0024] Figure 2 This is a schematic diagram of the tubular structure of one embodiment of the present invention when the inner and outer cylinders of the evaporator are coaxially sleeved.

[0025] Figure 3 This is an exploded schematic diagram of the tubular structure as the inner and outer cylinders of an evaporator, according to an embodiment of the present invention.

[0026] Figure 4 This is a cross-sectional structural diagram of an embodiment of the present invention when the inner cylinder and the outer cylinder are coaxially sleeved.

[0027] Figure 5 This is an enlarged schematic diagram of the end flange structure when the inner and outer cylinders are coaxially sleeved according to an embodiment of the present invention.

[0028] in:

[0029] 1-Inner cylinder; 2-Outer cylinder; 3-Spiral protrusion; 4-Refrigerant inlet pipe; 5-Refrigerant outlet pipe; 6-End flange.

[0030] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0031] It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0032] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly and specifically defined.

[0033] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, a direct connection, or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0034] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0035] Reference Figures 1-5 An embodiment of the present invention provides a tubular structure, wherein the outer side of the tubular structure is provided with an outwardly protruding spiral protrusion 3, and the portion of the outer side other than the spiral protrusion 3 forms a spiral recess, and each end of the spiral recess is provided with a through hole; wherein the spiral protrusion 3 is a continuous spiral protrusion 3, or is a spiral protrusion 3 formed by at least two spiral protrusions 3 arranged with their ends spaced apart.

[0036] If the spiral protrusion 3 is a continuous spiral protrusion 3, then the first and last ends of the spiral protrusion 3 are close to the two ends of the outer side surface, and the axial distance between the first and last ends of the spiral protrusion 3 is less than the axial distance between the first and last ends of the spiral concave part; if the spiral protrusion 3 is a spliced ​​spiral protrusion 3 formed by arranging at least two spiral protrusions 3 with their first and last ends spaced apart, then the first and last ends of the spiral protrusion 3 are close to the two ends of the outer side surface, and the axial distance between the first and last ends of the spliced ​​spiral protrusion 3 is less than the axial distance between the first and last ends of the spiral concave part.

[0037] In this embodiment, the spiral protrusions 3 and corresponding spiral recesses on the outer surface form a continuous flow guiding structure, significantly increasing the heat exchange area and improving heat transfer efficiency. The through holes at the beginning and end of the spiral recesses allow for the directional entry and exit of refrigerant, avoiding turbulence and ensuring a controllable flow path.

[0038] The axial distance between the beginning and end is less than that of the spiral recess, shortening the dead zone of refrigerant flow. Specifically, when the tubular structure is configured as the inner cylinder of the evaporator, the refrigerant flow channel formed by the outer wall of the tubular structure can be completely filled with refrigerant, and the beginning and end ends of the spiral protrusion are completely immersed in refrigerant.

[0039] In some embodiments, the tubular structure is a one-piece molded structure.

[0040] The tubular structure is integrally formed through casting or extrusion processes, eliminating welds or joint gaps and preventing the risk of refrigerant leakage; it also enhances overall mechanical strength and sealing performance; and simplifies the production process and reduces manufacturing costs.

[0041] The cross-section of the spiral protrusion 3 is semi-circular.

[0042] The helical protrusion 3 has a semi-circular cross-section, which minimizes fluid flow resistance and reduces pressure loss; it also ensures uniform stress distribution, avoids stress concentration at sharp corners, and extends service life.

[0043] The maximum width of the last recess at the beginning or end of the spiral recess is greater than 1.5 times the width of the groove of the spiral protrusion 3.

[0044] The cross-section of the spiral protrusion 3 is semi-circular, and the ratio of groove depth to groove width is preferably set to 0.5:1-1:1. The maximum width of the last recess at the beginning or end of the spiral recess is greater than 1.5 times the groove width of the spiral protrusion 3, in order to optimize fluid collection efficiency.

[0045] The helix angle of the spiral protrusion 3 is 10°-30°.

[0046] The spiral helix angle of the spiral protrusion 3 is 10°-30°, preferably 15°, which achieves a balance between fluid guiding capability and structural compactness.

[0047] The tubular structure is made of any one of stainless steel, copper, aluminum, or aluminum alloy.

[0048] The tubular structure is made of stainless steel, copper, aluminum, or aluminum alloy, taking into account both thermal conductivity and corrosion resistance, and can be selected according to requirements.

[0049] This utility model also protects an evaporation cylinder, which uses the aforementioned tubular structure as the inner cylinder 1 of the evaporation cylinder;

[0050] The evaporation cylinder also includes:

[0051] The outer cylinder 2 is coaxially sleeved on the outside of the inner cylinder 1 and is interference-fitted with the inner cylinder, so that the spiral protrusion 3 of the inner cylinder 1 and the inner wall of the outer cylinder 2 form a spiral flow channel, i.e. a refrigerant flow channel. The refrigerant flow channel can be completely filled with refrigerant, thereby eliminating the cooling dead angles at both ends of the evaporator cylinder.

[0052] The two through holes on the inner cylinder 1 are respectively connected to the refrigerant inlet pipe 4 and the refrigerant outlet pipe 5.

[0053] The spiral protrusion 3 and the inner wall of the outer cylinder 2 form a closed spiral flow channel, which forces the refrigerant to flow in a spiral and extends the heat exchange path.

[0054] Through-hole connection of inlet / outlet pipes enables directional refrigerant circulation, resulting in a compact structure and reduced external piping complexity; spiral flow channel improves the uniformity of evaporation phase change and avoids local overheating / overcooling.

[0055] The highest point of the spiral protrusion 3 of the inner cylinder 1 abuts against the inner wall of the outer cylinder 2.

[0056] In the evaporation cylinder, the highest point of the spiral protrusion 3 of the inner cylinder 1 abuts against the inner wall of the outer cylinder 2 to form a sealed contact, ensuring that there is no leakage in the spiral flow channel.

[0057] The highest point of the spiral protrusion 3 of the inner cylinder 1 forms an interference fit with the inner wall of the outer cylinder 2.

[0058] The clearance fit ranges from 0.1 to 3 mm, which reduces the assembly accuracy requirements and facilitates production and installation; it reserves space for thermal expansion and contraction to prevent high-temperature deformation and damage; the micro-gap can still maintain the sealing of the main channel and does not affect the core heat exchange function.

[0059] The inner cylinder 1 and the outer cylinder 2 are sealed at their end faces by an end flange 6, and the end flange 6 is fixedly connected to the end face of the outer cylinder 2.

[0060] The end flange 6 seal achieves a rigid seal on the inner / outer cylinder 2 end faces to prevent axial leakage; the fixed flange connection enhances structural stability and facilitates disassembly and maintenance.

[0061] The outer cylinder 2 is made of any one of stainless steel, copper, aluminum, or aluminum alloy, and preferably the same material as the inner cylinder 1.

[0062] This utility model embodiment also provides a snow melting machine, including the aforementioned evaporation cylinder.

[0063] Description: During operation, this tubular structure, evaporator, and snow melting machine form a spiral flow channel through the coaxial sleeve structure of the inner cylinder 1 and outer cylinder 2. The refrigerant enters through the refrigerant inlet pipe 4 and flows spirally along the axial direction of the inner cylinder 1 under the guidance of the spiral protrusion 3, eventually exiting through the refrigerant outlet pipe 5, forming a closed loop. The spiral flow channel structure extends the contact time between the refrigerant and the wall of the inner cylinder 1 through the spiral angle and continuous extension path, ensuring uniform coolant flow without cooling dead zones. Simultaneously, the inner cylinder 1, made of a high thermal conductivity material, rapidly transfers the cold energy of the refrigerant to the external medium, such as snow water, achieving efficient heat absorption and evaporation. The cross-sectional shape of the spiral protrusion 3 breaks the laminar boundary layer by disturbing the fluid, enhancing the turbulence effect and improving heat transfer efficiency. Throughout the operation, the refrigerant spirals within the spiral flow channel, continuously absorbing heat from the external medium and vaporizing through the wall of the inner cylinder 1. Finally, the gaseous refrigerant is discharged and enters the compressor cycle, achieving snow water melting or environmental cooling functions. This application significantly improves heat exchange efficiency and reduces energy consumption, while ensuring long-term stable operation of the structure under high pressure and low temperature environments.

[0064] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural or procedural transformations made based on the content of the present utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present utility model.

Claims

1. A tubular structure, characterized in that, The outer side of the tubular structure is provided with an outwardly protruding spiral protrusion, and the portion of the outer side other than the spiral protrusion forms a spiral concave portion, with a through hole at each end of the spiral concave portion. The first and last ends of the spiral protrusion are respectively close to the two ends of the outer side, and the axial distance between the first and last ends of the spiral protrusion is less than the axial distance between the first and last ends of the spiral concave part. When the tubular structure is configured as the inner cylinder of the evaporator, the refrigerant flow channel formed on the outer wall of the tubular structure can be completely filled with refrigerant, and the beginning and end ends of the spiral protrusion are completely immersed in the refrigerant.

2. The tubular structure according to claim 1, characterized in that, The tubular structure is a one-piece molded structure.

3. The tubular structure according to claim 1, characterized in that, The cross-section of the spiral protrusion is semi-circular.

4. The tubular structure according to claim 1, characterized in that, The maximum width of the last recess at the beginning or end of the spiral recess is greater than 1.5 times the width of the groove of the spiral protrusion.

5. The tubular structure according to any one of claims 1-4, characterized in that, The helix angle of the spiral protrusion is 10°-30°.

6. The tubular structure according to claim 1, characterized in that, The tubular structure is made of any one of stainless steel, copper, aluminum, or aluminum alloy.

7. An evaporation tank, characterized in that, The tubular structure described in any one of claims 1-6 is used as the inner cylinder of the evaporation cylinder; The evaporation cylinder also includes: The outer cylinder is coaxially sleeved on the outside of the inner cylinder, so that the spiral protrusion of the inner cylinder cooperates with the inner wall of the outer cylinder to form a spiral flow channel, i.e. a refrigerant flow channel. The refrigerant flow channel can be completely filled with refrigerant, thereby eliminating the cooling dead angles at both ends of the evaporator cylinder. The two through holes on the inner cylinder are respectively connected to the refrigerant inlet pipe and the refrigerant outlet pipe.

8. The evaporation cylinder according to claim 7, characterized in that, The highest point of the spiral protrusion of the inner cylinder abuts against the inner wall of the outer cylinder.

9. The evaporation cylinder according to claim 7, characterized in that, The highest point of the spiral protrusion of the inner cylinder forms an interference fit with the inner wall of the outer cylinder.

10. The evaporation cylinder according to any one of claims 7-9, characterized in that, The inner cylinder and the outer cylinder are sealed at their end faces by end flanges, and the end flanges are fixedly connected to the end faces of the outer cylinder.

11. The evaporation cylinder according to claim 7, characterized in that, The outer cylinder is made of any one of stainless steel, copper, aluminum, or aluminum alloy.

12. A snow melting machine, characterized in that, Includes the evaporation cylinder as described in any one of claims 7-11.

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