Detachable heat exchanger

Abstract

The utility model discloses a detachable heat exchanger, relates to the field of heat exchange equipment, overcomes the defect of low mounting efficiency of a detachable heat exchanger in the prior art, and adopts the technical scheme that the detachable heat exchanger comprises a bracket and a plurality of mounting rods which are mounted on the bracket and extend front and back, and the mounting rods are sleeved with heat exchange plates; the portion, between every two adjacent front and back heat exchange plates, of the mounting rod is sleeved with a pipe spacer, and the total length of the pipe spacer is increased or decreased in the extending direction of the mounting rod so that the distance between smoke channels between every two adjacent heat exchange plates can be increased or decreased. The detachable heat exchanger is mainly used for achieving the effects of being high in installation speed and low in cost.

Description

Technical Field

[0001] This application relates to the field of heat exchange equipment, and in particular to a detachable heat exchanger. Background Technology

[0002] Plate heat exchangers are mainly composed of a series of corrugated metal plates stacked together. These plates are installed within a frame with fixed plates and movable clamping plates, and are clamped together by bolts. Sealing gaskets between the plates ensure the fluid passages are sealed. Their working principle utilizes the alternating flow of the hot-side fluid and the heated medium within different channels between the plates. Due to the temperature difference between the two sides of the plates, heat is spontaneously transferred from the high-temperature hot-side fluid to the low-temperature heated medium. Plate heat exchangers are characterized by high heat transfer efficiency, compact structure, simple operation, high flexibility, low heat loss, and wide application range, and are widely used in various industries such as chemical, food and beverage, HVAC, metallurgy, and power.

[0003] In existing technologies, detachable plate heat exchangers are used in some fields. For example, in food processing such as beverage production, detachable plate heat exchangers can easily adjust the heat exchange area and flow combination, increase or decrease the number of plates, or change the connection method according to different food processing processes and output requirements to meet heat exchange needs. In industries such as kitchen waste liquid, wastewater waste heat recovery, light industry brewing, and sugar refining, heat exchange is often required for mash, particulate media, and viscous media. Detachable plate heat exchangers have a special flow channel design that can adapt to the flow of such media, and their detachable feature allows for easy disassembly and cleaning of the plates and flow channels after a period of operation, preventing particle accumulation and viscous substance adhesion, and maintaining good heat exchange performance.

[0004] However, during disassembly and adjustment, when installing heat exchangers with different specifications and spacing requirements, it is necessary to prepare various sizes of sleeves for installation, or to assemble and install multiple sleeves to form hot-side channels with different spacing. This requires the processing of sleeves of different specifications, which increases the cost of producing heat exchangers. Moreover, when making simple adjustments, such as when processing different batches of products in the food industry, heat exchangers with different spacing are often used. When adjusting the spacing of a detachable heat exchanger, all plates need to be disassembled to adjust the different hot-side plate spacings, which increases the difficulty of installation and the overall operating cost. Summary of the Invention

[0005] In order to overcome the shortcomings of low installation and adjustment efficiency of existing detachable heat exchangers, this application provides a detachable heat exchanger that can achieve fast adjustment of the hot-side flow channel spacing and low adjustment cost.

[0006] To achieve the above objectives, this application adopts the following technical solution: a detachable heat exchanger, including a bracket and multiple front-to-back extending mounting rods mounted on the bracket. Heat exchange plates are sleeved on the mounting rods, and a spacer tube is sleeved on the mounting rod between two adjacent front and rear heat exchange plates. The total length of the spacer tube is extended or shortened along the extension direction of the mounting rods to increase or decrease the distance between the hot side channels of two adjacent heat exchange plates.

[0007] By adopting the above technical solution, this application has the following advantages: In the prior art, installing heat exchangers of different specifications and requirements requires preparing various sizes of sleeves and processing different specifications of sleeves. However, in this application, the spacer tube can be extended or shortened along the extension direction of the mounting rod, meaning that the same spacer tube can adapt to different spacing requirements, eliminating the need to process multiple different specifications of sleeves, greatly reducing the types and quantities of sleeves to be processed, and lowering production costs. Furthermore, in actual installation, various special situations may be encountered, or fine adjustments to the spacing between heat exchange plates may be required. The expandable characteristic of the spacer tube allows installers to flexibly adjust the spacing between adjacent heat exchange plates according to the actual situation without replacing sleeves of different specifications, improving the flexibility and adaptability of the installation.

[0008] Furthermore, the spacer tube includes a fixed tube and a movable tube, and the movable tube is threadedly connected to the fixed tube.

[0009] Using the aforementioned technical solution, the threaded connection features a precise pitch design, allowing for accurate control of the extension or shortening of the spacer tube with minimal displacement by rotating the movable tube. This enables precise adjustment of the spacing between adjacent heat exchange plates to meet the precise requirements of fluid flow and heat exchange under different operating conditions. The threaded connection provides a reliable self-locking function; once the spacer tube is adjusted to the appropriate length, the friction between the threads effectively prevents the movable tube from loosening or shifting due to vibration, fluid impact, or other factors during equipment operation, ensuring the stability of the spacing between adjacent heat exchange plates.

[0010] Furthermore, the movable tube includes a first moving tube and a second moving tube. The outer wall of the first moving tube is provided with a protective sleeve with an inner diameter larger than the outer diameter of the second moving tube, so that the protective sleeve always covers the threaded connection on the fixed tube when the first moving tube and the second moving tube are far apart.

[0011] By employing the aforementioned technical solution, during the elongation or shortening of the spacer tube—that is, when the first and second moving tubes move away from or closer to each other—the protective sleeve consistently shields the threaded connection on the fixed tube. This effectively prevents impurities and corrosive media from entering the threaded connection, avoiding wear and corrosion damage to the threads, thereby ensuring the reliability and stability of the threaded connection and extending the service life of the spacer tube. For example, in some chemical production environments where various corrosive gases and liquids are present, the protective sleeve effectively protects the threads from corrosion, ensuring the normal operation of the spacer tube.

[0012] Furthermore, the inner wall of the protective sleeve is provided with an inwardly extending first abutment portion, and the outer wall of the second moving tube is provided with an outwardly extending second abutment portion. The outer diameter of the second abutment portion is larger than the inner diameter of the first abutment portion, and the outer diameter of the second abutment portion is smaller than the inner diameter of the protective sleeve.

[0013] By employing the aforementioned technical solution, the outer diameter of the second abutment part is larger than the inner diameter of the first abutment part. This ensures that when the second moving tube moves outward (away from the first moving tube), it cannot continue to move outward once the second abutment part contacts the first abutment part, thus limiting the maximum distance between the first and second moving tubes. This ensures that the spacer tube will not exceed its reasonable expansion and contraction range during adjustment, preventing structural damage or impact on the normal operation of the heat exchanger due to excessive elongation. It also ensures that the spacing between adjacent heat exchange plates is not too large, thus preventing interference with heat exchange efficiency. Furthermore, the presence of both the first and second abutment parts makes it more difficult for hot-side fluid to enter the threaded connection, protecting the lifespan and normal operation of the threads.

[0014] Furthermore, rolling sealing rings are provided between the first abutting part and the outer wall of the second moving tube, and between the second abutting part and the inner wall of the protective sleeve.

[0015] Using the aforementioned technical solution, the rolling sealing ring can fill the tiny gaps between the first contact part and the outer wall of the second moving tube, and between the second contact part and the inner wall of the protective sleeve, effectively preventing the heat exchange medium inside the heat exchanger from leaking from these parts. This is crucial for ensuring the normal operation of the heat exchanger, especially when handling toxic, harmful, flammable, explosive, or valuable media; good sealing performance can prevent safety accidents and economic losses.

[0016] Furthermore, the spacer tube includes a first sliding tube and a second sliding tube, and a snap-fit ​​fixing structure is provided between the first sliding tube and the second sliding tube.

[0017] By employing the aforementioned technical solution, the arrangement of the first and second sliding tubes makes the extension and retraction of the spacer tube more convenient and intuitive. Installers can adjust the length of the spacer tube simply by sliding the first and second sliding tubes, thereby precisely controlling the spacing between adjacent heat exchange plates. Compared to some other possible extension structures, this sliding tube design is easier to operate, requiring no complex tools or special skills, thus improving adjustment efficiency during installation.

[0018] Furthermore, the first sliding tube is sleeved on the outer wall of the second sliding tube, and the fixing structure includes a protrusion fixed to one of the inner wall of the first sliding tube and the outer wall of the second sliding tube and a sliding groove provided on the other. The sliding groove is provided with a plurality of slots spaced apart along the extension direction of the mounting rod, so that the first sliding tube and the second sliding tube are axially fixed when the protrusion slides from the sliding groove into the slot.

[0019] Using the aforementioned technical solution, the fixed structure has relatively few components, mainly consisting of protrusions, sliding grooves, and locking slots, resulting in a relatively simple manufacturing process and low cost. Furthermore, during operation, the engagement of the protrusions and locking slots effectively restricts the relative axial movement between the first and second sliding tubes, ensuring the stability of the spacer tube during use. Even if the heat exchanger is subjected to vibration or impact during operation, the engagement of the protrusions and locking slots prevents unexpected expansion or contraction of the spacer tube, ensuring the normal operation of the heat exchanger.

[0020] Furthermore, the first sliding tube is provided with a cover sleeve that extends along the mounting rod and always covers the sliding groove and the slot during sliding.

[0021] By adopting the aforementioned technical solution, the cover sleeve can form a tighter sealing structure between the first sliding tube and the second sliding tube, further preventing external substances from entering the sliding groove and the slot. Good sealing performance helps maintain the cleanliness and dryness of the spacer tube's interior, reduces component damage caused by external factors, improves the reliability and stability of the spacer tube, and thus ensures the normal operation of the heat exchanger.

[0022] Furthermore, the fluid inlet entering the heat exchange plate is located downstream of the hot-side fluid flow direction and enters from the upper side of the heat exchange plate; the fluid outlet exiting the heat exchange plate is located upstream of the hot-side fluid flow direction and exits from the lower side of the heat exchange plate.

[0023] By employing the aforementioned technical solution and this inlet / outlet layout, the heated medium (fluid) and the hot-side fluid form a counter-current heat exchange between the heat exchange plates. Counter-current heat exchange is a highly efficient method because a significant temperature difference is maintained between the hot and cold fluids throughout the process, allowing for more efficient heat transfer. Compared to co-current heat exchange, counter-current heat exchange achieves higher heat exchange efficiency under the same heat exchange area and operating conditions, thereby improving the overall heat exchange performance of the plate heat exchanger and enabling the heated medium to absorb more heat for better heating results. Since the fluid enters the heat exchange plate downstream of the hot-side fluid flow direction, it has already undergone some heat exchange and is at a relatively low temperature. The fluid first contacts this lower-temperature portion of the hot-side fluid and then gradually flows towards the higher-temperature region. This flow pattern allows the hot-side fluid to release as much heat as possible before leaving the heat exchanger, further reducing its temperature, improving energy utilization efficiency, and reducing energy waste.

[0024] Furthermore, the heat exchange plate is formed by welding two thin plates together through several welding parts, and the welding parts of the heat exchange plate are provided with mounting holes that are compatible with the mounting rod.

[0025] By employing the aforementioned technical solution, mounting holes adapted to the mounting rod are provided on the welded portion of the heat exchange plate, allowing the heat exchange plate to be easily installed on the mounting rod. Furthermore, this does not affect the fluid flow inside the heat exchange plate and reduces the possibility of internal leakage. Attached Figure Description

[0026] The following description, in conjunction with the accompanying drawings, further illustrates this application:

[0027] Figure 1 This is a schematic diagram of a detachable heat exchanger according to this application;

[0028] Figure 2 A side view of a detachable heat exchanger;

[0029] Figure 3 This is a cross-sectional view of embodiment 1 of the spacer tube;

[0030] Figure 4 This is a cross-sectional view of embodiment 2 of the fixed-distance tube;

[0031] Figure 5 This is a front view of a detachable heat exchanger.

[0032] Figure descriptions: 1. Bracket; 11. Mounting rod; 12. Heat exchange plate; 13. Hot side channel; 14. Fluid inlet; 15. Fluid outlet; 16. Mounting hole; 2. Spacing tube; 3. Fixed tube; 4. Movable tube; 41. First moving tube; 42. Second moving tube; 43. Protective sleeve; 44. First abutment part; 45. Second abutment part; 5. Rolling sealing ring; 6. First sliding tube; 61. Second sliding tube; 62. Cover sleeve; 7. Protrusion; 8. Slide groove; 9. Slot. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.

[0034] The terms "first," "second," etc. (if present) in the specification and claims of this application 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 application, "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. It should be understood that in this application, "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.

[0035] The technical solutions of this application will be described in detail below with specific embodiments. The following specific embodiments can 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.

[0036] Example 1:

[0037] like Figures 1 to 3 as well as Figure 5As shown, this application provides a detachable heat exchanger, including a bracket 1 and multiple front-to-back extending mounting rods 11 mounted on the bracket 1. Heat exchange plates 12 are sleeved on the mounting rods 11, and spacer tubes 2 are sleeved on the mounting rods 11 between two adjacent heat exchange plates 12. The total length of the spacer tubes 2 is extended or shortened along the extension direction of the mounting rods 11 so that the distance between the hot side channels 13 between two adjacent heat exchange plates 12 becomes larger or smaller.

[0038] After adopting the above technical solution, this application has the following advantages: In the prior art, when installing heat exchangers of different specifications and requirements, it is necessary to prepare various sizes of sleeves and process sleeves of different specifications. However, in this application, the spacer tube 2 can be extended or shortened along the extension direction of the mounting rod 11, which means that the same spacer tube 2 can adapt to different spacing requirements, eliminating the need to process multiple sleeves of different specifications, greatly reducing the types and quantities of sleeves to be processed, and lowering production and processing costs. Furthermore, in the actual installation process, various special situations may be encountered or the spacing between the heat exchange plates 12 may need to be fine-tuned. The extensibility of the spacer tube 2 allows installers to flexibly adjust the spacing between two adjacent heat exchange plates 12 according to the actual situation without replacing sleeves of different specifications, improving the flexibility and adaptability of the installation.

[0039] Understandably, the heat exchange plate 12 is mounted on the bracket 1 via the mounting rod 11. In actual use, the bracket 1 will install side plates with different openings according to different size requirements, so that the cold side fluid in the heat exchange plate 12 can enter the heat exchange plate 12 from the opening of the side plate for heat exchange.

[0040] Furthermore, the fixed-distance tube 2 includes a fixed tube 3 and a movable tube 4, wherein the movable tube 4 is threadedly connected to the fixed tube 3.

[0041] Using the aforementioned technical solution, the threaded connection features a precise pitch design. By rotating the movable tube 4, the extension or shortening of the spacer tube 2 can be precisely controlled with a small displacement. This allows for precise adjustment of the distance between adjacent heat exchange plates 12 to meet the precise requirements of fluid flow and heat exchange under different operating conditions. The threaded connection provides a reliable self-locking function. Once the spacer tube 2 is adjusted to the appropriate length, the friction between the threads effectively prevents the movable tube 4 from loosening or shifting due to vibration, fluid impact, or other factors during equipment operation, ensuring the stability of the distance between adjacent heat exchange plates 12.

[0042] Furthermore, the movable tube 4 includes a first movable tube 41 and a second movable tube 42. The outer wall of the first movable tube 41 is provided with a protective sleeve 43 with an inner diameter larger than the outer diameter of the second movable tube 42, so that the protective sleeve 43 always covers the threaded connection part on the fixed tube 3 when the first movable tube 41 and the second movable tube 42 are far apart from each other.

[0043] By employing the aforementioned technical solution, during the elongation or shortening of the spacer tube 2, that is, when the first moving tube 41 and the second moving tube 42 move away from or approach each other, the protective sleeve 43 always shields the threaded connection on the fixed tube 3. This effectively prevents impurities, corrosive media, etc., from entering the threaded connection, avoiding damage such as wear and corrosion to the threads, thereby ensuring the reliability and stability of the threaded connection and extending the service life of the spacer tube 2. For example, in some chemical production environments, various corrosive gases and liquids are present; the protective sleeve 43 can effectively protect the threads from corrosion, ensuring the normal operation of the spacer tube 2.

[0044] Specifically, the protective sleeve 43 is located at the front and rear of the first moving tube 41, which can protect the threaded connection parts located on the fixed tube 3 at the front and rear of the first moving tube 41.

[0045] Furthermore, the inner wall of the protective sleeve 43 is provided with an inwardly extending first abutting portion 44, and the outer wall of the second moving tube 42 is provided with an outwardly extending second abutting portion 45. The outer diameter of the second abutting portion 45 is larger than the inner diameter of the first abutting portion 44, and the outer diameter of the second abutting portion 45 is smaller than the inner diameter of the protective sleeve 43.

[0046] By employing the aforementioned technical solution, the outer diameter of the second abutment portion 45 is larger than the inner diameter of the first abutment portion 44. This ensures that when the second moving tube 42 moves outward (away from the first moving tube 41), it cannot continue to move outward once the second abutment portion 45 contacts the first abutment portion 44, thus limiting the maximum distance between the first moving tube 41 and the second moving tube 42. This ensures that the spacer tube 2 does not exceed a reasonable range of extension during adjustment, preventing structural damage or affecting the normal operation of the heat exchanger due to excessive elongation. It also ensures that the spacing between adjacent heat exchange plates 12 is not too large, thus not affecting the heat exchange effect. Furthermore, the presence of the first abutment portion 44 and the second abutment portion 45 makes it more difficult for hot-side fluid to enter the threaded connection, protecting the lifespan and normal operation of the threads.

[0047] Furthermore, a rolling sealing ring 5 is provided between the first abutting part 44 and the outer wall of the second moving tube 42, and between the second abutting part 45 and the inner wall of the protective sleeve 43.

[0048] Using the aforementioned technical solution, the rolling sealing ring 5 can fill the tiny gaps between the first abutment part 44 and the outer wall of the second moving tube 42, and between the second abutment part 45 and the inner wall of the protective sleeve 43, effectively preventing the heat exchange medium inside the heat exchanger from leaking from these parts. This is crucial for ensuring the normal operation of the heat exchanger, especially when handling toxic, harmful, flammable, explosive, or valuable media; good sealing performance can prevent safety accidents and economic losses.

[0049] Furthermore, the fluid inlet 14 entering the heat exchange plate 12 is located downstream in the hot-side fluid flow direction and enters from the upper side of the heat exchange plate 12; the fluid outlet 15 exiting the heat exchange plate 12 is located upstream in the hot-side fluid flow direction and exits from the lower side of the heat exchange plate 12.

[0050] By employing the aforementioned technical solution and this inlet / outlet layout, the heated medium (fluid) and the hot-side fluid form a counter-current heat exchange mechanism between the heat exchange plates 12. Counter-current heat exchange is a highly efficient heat exchange method because a significant temperature difference is maintained between the hot and cold fluids throughout the process, allowing for more efficient heat transfer. Compared to co-current heat exchange, counter-current heat exchange can achieve higher heat exchange efficiency under the same heat exchange area and operating conditions, thereby improving the overall heat exchange performance of the plate heat exchanger and enabling the heated medium to absorb more heat for better heating results. Since the cold-side fluid enters the heat exchange plate 12 downstream of the hot-side fluid flow direction, it has already undergone some heat exchange and is at a relatively low temperature. The fluid first contacts this lower-temperature portion of the hot-side fluid and then gradually flows towards the higher-temperature region. This flow pattern allows the hot-side fluid to release as much heat as possible before leaving the heat exchanger, further reducing its temperature, improving energy utilization efficiency, and reducing energy waste.

[0051] Furthermore, the heat exchange plate 12 is formed by welding two thin plates together through several welding parts, and the welding parts of the heat exchange plate 12 are provided with mounting holes 16 that are compatible with the mounting rod 11.

[0052] By adopting the aforementioned technical solution, mounting holes 16 adapted to the mounting rod 11 are provided on the welded part of the heat exchange plate 12, so that the heat exchange plate 12 can be easily installed on the mounting rod 11. Furthermore, this does not affect the fluid flow inside the heat exchange plate 12 and reduces the occurrence of internal leaks.

[0053] Example 2:

[0054] like Figure 4 As shown, the fixed-distance tube 2 further includes a first sliding tube 6 and a second sliding tube 61, and a snap-fit ​​fixing structure is provided between the first sliding tube 6 and the second sliding tube 61.

[0055] By adopting the aforementioned technical solution, the arrangement of the first sliding tube 6 and the second sliding tube 61 makes the extension and retraction operation of the spacer tube 2 more convenient and intuitive. Installers can adjust the length of the spacer tube 2 simply by sliding the first sliding tube 6 and the second sliding tube 61, thereby precisely controlling the spacing between adjacent heat exchange plates 12. Compared to some other possible extension structures, this sliding tube form is easier to operate, requires no complex tools or special skills, and improves the adjustment efficiency during installation.

[0056] Furthermore, the first sliding tube 6 is sleeved on the outer wall of the second sliding tube 61. The fixing structure includes a protrusion 7 fixed on one of the inner wall of the first sliding tube 6 and the outer wall of the second sliding tube 61, and a groove 8 provided on the other. The groove 8 is provided with a plurality of slots 9 spaced apart along the extension direction of the mounting rod 11, so that the first sliding tube 6 and the second sliding tube 61 are axially fixed when the protrusion 7 slides from the groove 8 into the slot 9.

[0057] Using the aforementioned technical solution, the fixed structure has relatively few components, mainly consisting of protrusion 7, sliding groove 8, and locking groove 9, resulting in a relatively simple manufacturing process and low cost. Simultaneously, during operation, the engagement of protrusion 7 and locking groove 9 effectively restricts the relative axial movement between the first sliding tube 6 and the second sliding tube 61, ensuring the stability of the spacer tube 2 during use. Even if the heat exchanger is subjected to vibration or impact during operation, the engagement of protrusion 7 and locking groove 9 prevents accidental expansion or contraction of the spacer tube 2, ensuring the normal operation of the heat exchanger.

[0058] Furthermore, the first sliding tube 6 is provided with a cover sleeve 62 extending along the mounting rod 11, which always covers the sliding groove 8 and the slot 9 during the sliding process.

[0059] By adopting the aforementioned technical solution, the cover sleeve 62 can form a tighter sealing structure with the first sliding tube 6 and the second sliding tube 61, further preventing external substances from entering the interior of the sliding groove 8 and the retaining groove 9. Good sealing performance helps maintain the cleanliness and dryness of the interior of the spacer tube 2, reduces component damage caused by external factors, improves the reliability and stability of the spacer tube 2, and thus ensures the normal operation of the heat exchanger.

[0060] In addition to the preferred embodiments described above, this application has other implementation methods. All other embodiments obtained by those skilled in the art based on the embodiments in this application without creative effort are within the scope of protection claimed in this application.

Claims

1. A detachable heat exchanger, characterized in that, It includes a bracket and multiple front-to-back extending mounting rods mounted on the bracket. Heat exchange plates are fitted on the mounting rods. A spacer tube is fitted on the mounting rod between two adjacent heat exchange plates. The total length of the spacer tube can be extended or shortened along the extension direction of the mounting rod to increase or decrease the distance between the hot side channels of two adjacent heat exchange plates.

2. A detachable heat exchanger according to claim 1, characterized in that, The fixed-distance tube includes a fixed tube and a movable tube, and the movable tube is threadedly connected to the fixed tube.

3. A detachable heat exchanger according to claim 2, characterized in that, The movable tube includes a first movable tube and a second movable tube. The outer wall of the first movable tube is provided with a protective sleeve with an inner diameter larger than the outer diameter of the second movable tube, so that the protective sleeve always covers the threaded connection part on the fixed tube when the first movable tube and the second movable tube are far apart.

4. A detachable heat exchanger according to claim 3, characterized in that, The inner wall of the protective sleeve is provided with an inwardly extending first abutting part, and the outer wall of the second moving tube is provided with an outwardly extending second abutting part. The outer diameter of the second abutting part is larger than the inner diameter of the first abutting part, and the outer diameter of the second abutting part is smaller than the inner diameter of the protective sleeve.

5. A detachable heat exchanger according to claim 4, characterized in that, A rolling sealing ring is provided between the first abutting part and the outer wall of the second moving tube, and between the second abutting part and the inner wall of the protective sleeve.

6. A detachable heat exchanger according to claim 1, characterized in that, The spacer tube includes a first sliding tube and a second sliding tube, and a snap-fit ​​fixing structure is provided between the first sliding tube and the second sliding tube.

7. A detachable heat exchanger according to claim 6, characterized in that, The first sliding tube is sleeved on the outer wall of the second sliding tube. The fixing structure includes a protrusion fixed to one of the inner wall of the first sliding tube and the outer wall of the second sliding tube, and a sliding groove provided on the other. The sliding groove is provided with a plurality of slots spaced apart along the extension direction of the mounting rod, so that the first sliding tube and the second sliding tube are axially fixed when the protrusion slides from the sliding groove into the slot.

8. A detachable heat exchanger according to claim 7, characterized in that, The first sliding tube is provided with a cover sleeve that extends along the mounting rod and always covers the sliding groove and the slot during the sliding process.

9. A detachable heat exchanger according to claim 1, characterized in that, The fluid inlet entering the heat exchange plate is located downstream of the hot-side fluid flow direction and enters from the upper side of the heat exchange plate; the fluid outlet exiting the heat exchange plate is located upstream of the hot-side fluid flow direction and exits from the lower side of the heat exchange plate.

10. A detachable heat exchanger according to claim 1, characterized in that, The heat exchange plate is made of two thin plates welded together by several welding parts, and the welding parts of the heat exchange plate are provided with mounting holes that are compatible with the mounting rod.

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