Separated cold and heat exchanger for air conditioner

By designing a separate cooling and heat exchanger for air-conditioning with threaded cylinders and limiting units, the problem of inconvenient disassembly of HVAC cooling and heat exchangers is solved, and convenient disassembly and installation of compressor units and cooling and heat exchangers is achieved, and maintenance efficiency is improved.

CN223204471UActive Publication Date: 2025-08-08XINLING COLD ENVIRONMENTAL TECHNOLOGY (JIANGSU) CO LTD
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Patent Information

Application Number
CN202422486834.X
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-10-14
Publication Date
2025-08-08
Estimated Expiration
2034-10-14

AI Technical Summary

Technical Problem

The existing HVAC cooling and heat exchangers are not convenient to be disassembled after installation, which affects maintenance efficiency, and is troublesome to disassemble the pipe connection between the compressor unit and the cooling and heat exchanger.

Method used

A separate cold and heat exchanger for air conditioning is designed. By setting up a threaded barrel, a driving unit and a limiting unit, the moving barrel moves along the threaded barrel, thereby achieving convenient disassembly and installation of the compressor unit and the cold and heat exchanger, avoiding cutting off the pipe.

Benefits of technology

It realizes convenient disassembly and installation of compressor sets and cold and heat exchangers, improves maintenance efficiency, and avoids the trouble of pipe cutting.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model belongs to the technical field of air conditioners, and discloses a separated cold and heat exchanger for an air conditioner, which comprises a mounting assembly, a compressor unit and a cold and heat exchanger are arranged in the mounting assembly, and the end parts of the compressor unit and the cold and heat exchanger are respectively communicated with a first flow guide pipe and a second flow guide pipe; a connecting assembly is connected between the first flow guide pipe and the second flow guide pipe and comprises an outer pipe, a threaded cylinder is rotationally arranged in the outer pipe, the directions of threads on the two sides in the threaded cylinder are opposite, moving cylinders are spirally arranged at the two ends in the threaded cylinder correspondingly, and outer connecting pipes are arranged at the outer ends of the moving cylinders. And an inner connecting pipe is arranged in the two moving cylinders, and the inner connecting pipe is rotationally connected with the threaded cylinder. When disassembly and maintenance are needed, the threaded cylinder is rotated through the driving unit, the two moving cylinders move inwards, the two outer connecting pipes are driven to move inwards, the two outer connecting pipes are moved out of the first flow guide pipe and the second flow guide pipe, and the first flow guide pipe and the second flow guide pipe are disconnected.
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Description

Technical Field

[0001] The utility model relates to the technical field of air conditioning, in particular to a separate cold and hot exchanger for air conditioning. Background Art

[0002] HVAC refers to the systems and equipment responsible for heating, ventilation, and air conditioning in a room or vehicle. The design of HVAC systems applies thermodynamics, fluid mechanics, and fluid mechanics, making it a key discipline within mechanical engineering. Its goal is to create an artificial indoor environment conducive to human survival. HVAC systems control air temperature and humidity, improving indoor comfort and are a crucial component of medium- to large-scale industrial buildings or office structures, such as skyscrapers. HVAC plays a crucial role in fields and industries such as pharmaceuticals, electronics, mission-critical facilities, and the oil and gas industry.

[0003] Existing HVAC heat exchangers are difficult to disassemble after installation, making maintenance more cumbersome and affecting overall assembly and disassembly efficiency. Furthermore, the HVAC compressor unit and heat exchanger are connected by pipes, and removing a component for maintenance requires cutting the pipes, which is quite cumbersome. Utility Model Content

[0004] In order to solve the above problems, the utility model provides a separate hot and cold exchanger for an air conditioner.

[0005] The above-mentioned technical objectives of the present utility model are achieved through the following technical solutions: A separate hot and cold exchanger for an air conditioner, comprising a compressor unit and a hot and cold exchanger, and also comprising an installation assembly, wherein the compressor unit and the hot and cold exchanger are arranged in the installation assembly, and the ends of the compressor unit and the hot and cold exchanger are respectively connected with a first guide pipe and a second guide pipe, and a connecting assembly is connected between the first guide pipe and the second guide pipe, and the connecting assembly includes an outer tube, a threaded cylinder is rotatably arranged in the outer tube, and a driving unit for driving the threaded cylinder to rotate is also provided in the outer tube, the threads on both sides of the threaded cylinder are in opposite directions, and moving cylinders are respectively spirally arranged at both ends of the threaded cylinder, an external connecting pipe is provided at the outer end of the moving cylinder, and a limiting unit for limiting the rotation of the moving cylinder is provided in the outer tube, the two external connecting pipes are respectively placed in the first guide pipe and the second guide pipe, and an internal connecting pipe is commonly provided in the two moving cylinders, the outer diameter of the internal connecting pipe is consistent with the inner diameter of the moving cylinder, and the internal connecting pipe is rotatably connected to the threaded cylinder.

[0006] By adopting the above technical solution, a compressor unit, a heat exchanger, a mounting assembly, an outer tube, a driving unit, a moving cylinder, a connecting tube, and a limiting unit are provided. The threaded cylinder is driven to rotate by the driving unit. Since the moving cylinder is restricted by the limiting unit and cannot rotate, the moving cylinder can only move along the threaded cylinder. The two moving cylinders move outward, and the two external connecting tubes are pushed into the first guide tube and the second guide tube respectively, so that the first guide tube and the second guide tube are connected; when disassembly and maintenance are required, the threaded cylinder is rotated by the driving unit to move the two moving cylinders inward, driving the two external connecting tubes to move inward, so that the two external connecting tubes are removed from the first guide tube and the second guide tube, and the first guide tube and the second guide tube are disconnected, and the compressor unit and the heat exchanger are separated, which is convenient for disassembly of the heat exchanger during maintenance. No pipeline needs to be cut during disassembly, and installation is more convenient.

[0007] Furthermore, both ends of the outer tube are provided with a cover plate, and a through hole consistent with the outer diameter of the external connecting tube is provided on the cover plate, and a first arc plate arranged coaxially with the through hole is provided on the cover plate, and the inner diameter of the first arc plate is consistent with the outer diameter of the first guide tube and the second guide tube, and first connecting plates are provided on both sides of the first arc plate, and screw holes are provided on the first connecting plate, and two first sliding grooves are provided on the cover plate at horizontal intervals, and a sliding rod is provided for sliding in the first sliding groove, and a second connecting plate parallel to the first connecting plate is provided on the sliding rod, and a through hole is provided on the second connecting plate, and a second arc plate is provided between the two second connecting plates.

[0008] and a tube connecting the discharging opening of the second end of the vehicle body and the second end of the vehicle body, wherein the first tube and the second end of the vehicle body are connected to each other with a toothed connection, and the toothed connection between the first tube and the second end of the vehicle body is connected with the toothed connection between the first tube and the second end of the vehicle body.

[0009] Furthermore, valves are provided on both the first flow guiding pipe and the second flow guiding pipe.

[0010] By adopting the above technical solution, valves are provided on both the first flow guiding pipe and the second flow guiding pipe, so that the first flow guiding pipe and the second flow guiding pipe can be closed.

[0011] Furthermore, the mounting assembly includes a first mounting frame, the compressor unit is arranged in the first mounting frame, the top of the first mounting frame is detachably connected to a second mounting frame, and the heat exchanger is arranged in the second mounting frame.

[0012] By adopting the above technical solution, a first mounting frame and a second mounting frame are provided, so that during maintenance, the second mounting frame can be separated from the first mounting frame according to specific circumstances, thereby making it possible to completely remove the heat exchanger for easy maintenance.

[0013] Furthermore, a plurality of mounting plates are vertically arranged on the upper side of the first mounting frame, and mounting holes are arranged on the mounting plates. Threaded holes are arranged on the lower side of the second mounting frame corresponding to the mounting holes, and bolts are passed through the mounting holes and screwed into the threaded holes to fix the second mounting frame.

[0014] By adopting the above technical solution, a mounting plate, a mounting hole, and a threaded hole are provided, and a bolt is passed through the mounting hole and screwed into the threaded hole to ensure the stability of the connection between the first mounting bracket and the second mounting bracket.

[0015] Furthermore, the driving unit includes a worm wheel sleeved on the outer wall of the threaded cylinder, a worm is rotatably arranged inside the outer tube, the worm cooperates with the worm wheel, and one end of the worm passes through the outer wall of the outer tube and is provided with a screwing handle.

[0016] By adopting the above technical solution, a worm wheel, a worm, and a screw handle are provided. Turning the screw handle drives the worm, thereby driving the worm wheel, and then driving the threaded barrel. Since the worm wheel and worm are self-locking, that is, only the worm can drive the worm wheel, after the threaded barrel adjusts the movable barrel and the external connecting pipe, the position of the external connecting pipe will not change.

[0017] Furthermore, the limiting unit includes a second sliding groove provided in the outer tube and arranged in the opposite direction along the length of the outer tube, and a sliding block connected to the moving cylinder is slidably provided in the second sliding groove.

[0018] By adopting the above technical solution, a second sliding groove and a sliding block are provided. Since the sliding block can only slide in the second sliding groove, the movable cylinder is circumferentially limited, so that the movable cylinder cannot rotate.

[0019] In summary, the utility model has the following beneficial effects: in this application, a compressor unit, a heat exchanger, an installation assembly, an outer tube, a driving unit, a moving cylinder, a connecting tube, and a limiting unit are provided. The threaded cylinder is driven to rotate by the driving unit. Since the moving cylinder is restricted by the limiting unit and cannot rotate, the moving cylinder can only move along the threaded cylinder. The two moving cylinders move outward, and the two external connecting tubes are pushed into the first guide tube and the second guide tube respectively, so that the first guide tube and the second guide tube are connected; when disassembly and maintenance are required, the threaded cylinder is rotated by the driving unit, so that the two moving cylinders move inward, driving the two external connecting tubes to move inward, so that the two external connecting tubes are moved out of the first guide tube and the second guide tube, the first guide tube and the second guide tube are disconnected, and the compressor unit and the heat exchanger are separated, which is convenient for disassembly of the heat exchanger during maintenance, and no pipeline needs to be cut during disassembly, which is more convenient during installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the utility model;

[0021] Figure 2 This is a schematic structural diagram of the connection component portion of an embodiment of the present utility model;

[0022] Figure 3 yes Figure 2 AA cross-sectional view;

[0023] Figure 4 This is a schematic diagram of the internal structure of the outer tube of an embodiment of the utility model;

[0024] Figure 5 It is a structural schematic diagram of the inner connecting pipe, the moving cylinder and the outer connecting pipe of an embodiment of the present utility model.

[0025] In the figure: 10, compressor unit; 11, first guide pipe; 20, heat exchanger; 21, second guide pipe; 30, mounting assembly; 31, first mounting bracket; 32, second mounting bracket; 33, mounting plate; 40, connecting assembly; 41, outer pipe; 42, threaded cylinder; 43, moving cylinder; 44, outer connecting pipe; 45, inner connecting pipe; 50, driving unit; 51, worm gear; 52, worm; 53, screw handle; 60, limiting unit; 61, second slide groove; 62, slider; 70, cover plate; 71, first curved plate; 72, first connecting plate; 73, screw hole; 74, first slide groove; 75, slide rod; 76, second connecting plate; 77, through hole; 78, second curved plate; 80, valve. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application; it is obvious that the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0027] like Figure 1-5 As shown, an embodiment of the present application discloses a separate hot and cold exchanger for an air conditioner, including a compressor unit 10, a hot and cold exchanger 20, an installation assembly 30, and a connecting assembly 40. The compressor unit 10 and the hot and cold exchanger 20 are arranged in the installation assembly 30. The ends of the compressor unit 10 and the hot and cold exchanger 20 are respectively connected with a plurality of first guide tubes 11 and a plurality of second guide tubes 21. The interiors of the first guide tubes 11 and the second guide tubes 21 are filled with refrigerant. There are multiple connecting assemblies 40, which are respectively arranged between the first guide tubes 11 and the corresponding second guide tubes 21, and are used to connect the first guide tubes 11 and the corresponding second guide tubes 21 so that the refrigerant in the first guide tubes 11 can flow smoothly into the second guide tubes 21.

[0028] Specifically, the connecting assembly 40 includes an outer tube 41, in which a threaded barrel 42 is rotatably disposed. A drive unit 50 is also disposed within the outer tube 41 to drive the threaded barrel 42 to rotate. The drive unit 50 includes a worm wheel 51 sleeved on the outer wall of the threaded barrel 42, and a worm 52 is rotatably disposed within the outer tube 41. The worm 52 cooperates with the worm wheel 51, and rotating the worm 52 drives the worm wheel 51 to rotate, thereby driving the threaded barrel 42 to rotate. One end of the worm 52 passes through the outer wall of the outer tube 41 and is provided with a screw handle 53 to facilitate rotation of the worm 52. Because the worm wheel 51 and worm 52 are self-locking, that is, only the worm 52 can drive the worm wheel 51, the position of the threaded barrel 42 will not change after the threaded barrel 42 is adjusted.

[0029] During installation, the threads on both sides of the threaded barrel 42 are in opposite directions. A moving barrel 43 is spirally installed at each end of the threaded barrel 42. A limiting unit 60 is installed in the outer tube 41 to limit the rotation of the moving barrel 43. The limiting unit 60 includes a second chute 61 arranged in the outer tube 41 and arranged in opposite directions along the length of the outer tube 41. A slider 62 connected to the moving barrel 43 is slidably installed in the second chute 61. Because the slider 62 can only slide in the second chute 61, the moving barrel 43 is circumferentially limited, making it impossible for the moving barrel 43 to rotate. When the threaded barrel 42 rotates, the moving barrel 43 is restricted by the limiting unit 60 and cannot rotate, so that the moving barrel 43 can only move along the threaded barrel 42. An external connecting tube 44 is installed at the outer end of the moving barrel 43. The movement of the moving barrel 43 drives the movement of the external connecting tube 44. Both movable cylinders 43 are provided with an internal connecting tube 45. The outer diameter of the internal connecting tube 45 matches the inner diameter of the movable cylinder 43. Sealing rings are provided on the outer walls of both ends of the internal connecting tube 45 to ensure a seal at the contact point between the movable cylinder 43 and the internal connecting tube 45. The internal connecting tube 45 is rotatably connected to the threaded cylinder 42, maintaining a constant axial position of the internal connecting tube 45 relative to the threaded cylinder 42. The two movable cylinders 43 move outward, pushing the two external connecting tubes 44 outward, respectively, placing them within the first and second flow conduit 11, 21, respectively. This allows the first and second flow conduit 11, 21 to communicate, and the refrigerant flows through the external connecting tube 44, the movable cylinder 43, and the internal connecting tube 45. When disassembly and maintenance are required, the drive unit 50 rotates the threaded cylinder 42, causing the two movable cylinders 43 to move inward, driving the two external connecting pipes 44 to move inward, and the two external connecting pipes 44 are removed from the first and second flow conduit pipes 11, 21. The first and second flow conduit pipes 11, 21 are disconnected, and the compressor unit 10 and the heat exchanger 20 are separated. Several sealing rings are provided on the outer walls of the external connecting pipes 44 to ensure a seal at the contact points between the external connecting pipes 44 and the first and second flow conduit pipes 11, 21.

[0030] In specific configuration, a cover plate 70 is provided at each end of the outer tube 41. The cover plate 70 has a through-hole that matches the outer diameter of the external connecting tube 44, allowing the external connecting tube 44 to pass through the cover plate 70. The cover plate 70 is provided with a first curved plate 71 arranged concentrically with the through-hole. Two first chute grooves 74 are horizontally spaced apart on the cover plate 70. A slide rod 75 is slidably disposed within the first chute grooves 74 and can slide along the direction of the first chute grooves 74. A second connecting plate 76 is provided on the slide rod 75, parallel to the first connecting plate 72. A second curved plate 78 is provided between the two second connecting plates 76. The inner diameters of the first and second curved plates 71 and 78 match the outer diameters of the first and second flow guide tubes 11 and 21. When it is necessary to connect the first flow guide pipe 11 and the second flow guide pipe 21, the pipe openings of the first flow guide pipe 11 and the second flow guide pipe 21 are aligned, and the distance between the pipe openings of the first flow guide pipe 11 and the pipe openings of the second flow guide pipe 21 is consistent with the distance between the outer sides of the two cover plates 70, and then the sliding rod 75 is slid so that the distance between the first curved plate 71 and the second curved plate 78 is greater than the diameter of the first flow guide pipe 11, and then the outer tube 41 is moved so that the first flow guide pipe 11 and the second flow guide pipe 21 pass through the gap between the corresponding first curved plate 71 and the second curved plate 78, and then the first flow guide pipe 11 and the second flow guide pipe 21 are clamped into the corresponding first curved plate 71, and then the sliding rod 75 is slid to drive the second connecting plate 76 and the second curved plate 78 to move. When the first curved plate 71 contacts the second curved plate 78, the whole is in a circular ring state, and the first flow guide pipe 11 and the second flow guide pipe 21 are clamped therein. First connecting plates 72 are provided on both sides of the first curved plate 71. Screw holes 73 are provided on the first connecting plate 72. Through holes 77 are provided on the second connecting plate 76. Screws are passed through the through holes 77 and screwed into the screw holes 73 to connect the first curved plate 71 and the second curved plate 78, thereby fixing the first guide tube 11 and the second guide tube 21.

[0031] The mounting assembly 30 includes a first mounting frame 31, within which the compressor unit 10 is mounted. A second mounting frame 32 is detachably connected to the top of the first mounting frame 31. The heat exchanger 20 is mounted within the second mounting frame 32. During maintenance, the second mounting frame 32 can be separated from the first mounting frame 31 as needed, allowing the heat exchanger 20 to be completely removed for easy maintenance. Several mounting plates 33 are vertically arranged on the upper side of the first mounting frame 31. These mounting plates 33 are provided with mounting holes. Threaded holes are provided on the lower side of the second mounting frame 32, corresponding to the mounting holes. Bolts are threaded through the mounting holes to ensure a stable connection between the first mounting frame 31 and the second mounting frame 32. The first flow conduit 11 and the second flow conduit 21 are both provided with valves 80, so that the first flow conduit 11 and the second flow conduit 21 can be closed. When dismantling and repairing, you can choose to release the refrigerant in the first flow conduit 11 and the second flow conduit 21 first, and then carry out the dismantling, or you can close the valve 80 before dismantling and keep the refrigerant in the first flow conduit 11 and the second flow conduit 21.

[0032] The operating principle of a separate hot and cold exchanger for air conditioning in this embodiment is as follows: when the first guide pipe 11 and the second guide pipe 21 need to be connected, the first guide pipe 11 and the second guide pipe 21 are aligned, and the distance between the pipe opening of the first guide pipe 11 and the pipe opening of the second guide pipe 21 is consistent with the distance between the outer sides of the two cover plates 70, and then the slide bar 75 is slid so that the distance between the first curved plate 71 and the second curved plate 78 is larger than the diameter of the first guide pipe 11, and then the outer tube 41 is moved so that the first guide pipe 11 and the second guide pipe 21 are aligned. The tube 21 passes through the gap between the corresponding first curved plate 71 and the second curved plate 78, and the first and second guide tubes 11 and 21 are then inserted into the corresponding first curved plate 71. The sliding rod 75 is then slid to move the second connecting plate 76 and the second curved plate 78. When the first and second curved plates 71 and 78 come into contact, the entirety forms a circular ring. The screw is then passed through the through hole 77 and screwed into the screw hole 73 to connect the first and second curved plates 71 and 78, thereby securing the first and second guide tubes 11 and 21. The screw handle 53 is then rotated to drive the worm 52, thereby driving the worm gear 51, and in turn, the threaded barrel 42, causing the two movable barrels 43 to move outward, pushing the two external connecting tubes 44 into the first and second guide tubes 11 and 21, respectively, thereby connecting the first and second guide tubes 11 and 21. When disassembly and maintenance are required, the threaded cylinder 42 is rotated by the driving unit 50 to move the two movable cylinders 43 inward, driving the two external connecting pipes 44 to move inward, so that the two external connecting pipes 44 are moved out of the first guide pipe 11 and the second guide pipe 21, and then the screws fixed in the screw holes 73 are unscrewed. Finally, the connecting assembly 40 is removed, the first guide pipe 11 and the second guide pipe 21 are disconnected, and the compressor unit 10 and the heat exchanger 20 are separated, which is convenient for disassembly of the heat exchanger 20 during maintenance. There is no need to cut any pipelines during disassembly, which is more convenient during installation.

[0033] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiment. All technical solutions based on the concept of the present invention are within the scope of protection of the present invention. It should be noted that for those skilled in the art, certain improvements and modifications that do not depart from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A separate heat exchanger for air conditioning, comprising a compressor unit (10) and a heat exchanger (20), characterized in that: The invention also includes a mounting assembly (30), wherein the compressor unit (10) and the cold and heat exchanger (20) are arranged in the mounting assembly (30), and the ends of the compressor unit (10) and the cold and heat exchanger (20) are respectively connected with a first guide tube (11) and a second guide tube (21), and a connecting assembly (40) is connected between the first guide tube (11) and the second guide tube (21), and the connecting assembly (40) includes an outer tube (41), a threaded barrel (42) is rotatably arranged in the outer tube (41), and a driving unit (50) for driving the threaded barrel (42) to rotate is also arranged in the outer tube (41), and the threaded barrel (42) is rotated. 2) The directions of the threads on both sides are opposite, and the two ends of the threaded barrel (42) are respectively spirally provided with a moving barrel (43), the outer end of the moving barrel (43) is provided with an external connecting pipe (44), and a limiting unit (60) for limiting the rotation of the moving barrel (43) is provided in the external pipe (41), and the two external connecting pipes (44) are respectively placed in the first guide pipe (11) and the second guide pipe (21), and an internal connecting pipe (45) is commonly provided in the two moving barrels (43), the outer diameter of the internal connecting pipe (45) is consistent with the inner diameter of the moving barrel (43), and the internal connecting pipe (45) is rotatably connected to the threaded barrel (42).

2. The separate heat and cold exchanger for air conditioning according to claim 1, characterized in that: Both ends of the outer tube (41) are provided with a cover plate (70), and a through hole is provided on the cover plate (70) with the same outer diameter as the outer connecting tube (44). The cover plate (70) is provided with a first arc plate (71) arranged coaxially with the through hole, and the inner diameter of the first arc plate (71) is consistent with the outer diameter of the first guide tube (11) and the second guide tube (21). First connecting plates (72) are provided on both sides of the first arc plate (71), and screw holes (73) are provided on the first connecting plate (72). Two first sliding grooves (74) are provided horizontally and spaced apart on the cover plate (70), and a sliding rod (75) is provided in the first sliding groove (74) for sliding. A second connecting plate (76) parallel to the first connecting plate (72) is provided on the sliding rod (75), and a through hole (77) is provided on the second connecting plate (76). A second arc plate (78) is provided between the two second connecting plates (76).

3. The separate heat and cold exchanger for air conditioning according to claim 1, characterized in that: Valves (80) are provided on both the first flow guide pipe (11) and the second flow guide pipe (21).

4. The separate hot and cold exchanger for air conditioning according to claim 1, characterized in that: The mounting assembly (30) comprises a first mounting frame (31), the compressor unit (10) is arranged in the first mounting frame (31), a second mounting frame (32) is detachably connected to the top of the first mounting frame (31), and the heat exchanger (20) is arranged in the second mounting frame (32).

5. The separate heat and cold exchanger for air conditioning according to claim 4, characterized in that: A plurality of mounting plates (33) are vertically arranged on the upper side of the first mounting frame (31), and mounting holes are arranged on the mounting plates (33). Threaded holes are arranged on the lower side of the second mounting frame (32) corresponding to the mounting holes, and bolts are passed through the mounting holes and screwed into the threaded holes to fix the second mounting frame (32).

6. The separate heat and cold exchanger for air conditioning according to claim 1, characterized in that: The driving unit (50) comprises a worm wheel (51) sleeved on the outer wall of the threaded barrel (42); a worm (52) is rotatably arranged in the outer tube (41); the worm (52) cooperates with the worm wheel (51); one end of the worm (52) passes through the outer wall of the outer tube (41) and is provided with a screwing handle (53).

7. The separate heat and cold exchanger for air conditioning according to claim 1, characterized in that: The limiting unit (60) includes a second sliding groove (61) provided in the outer tube (41) and arranged in the opposite direction along the length of the outer tube (41), and a sliding block (62) connected to the moving cylinder (43) is slidably provided in the second sliding groove (61).