A refrigeration device and its heat exchanger assembly

Abstract

The present invention provides a refrigeration device and its heat exchanger assembly, relating to the technical field of refrigeration devices. The refrigeration device and its heat exchanger assembly include a device housing. On one side inside the device housing, an air inlet is fixedly provided. On the side of the device housing near the air inlet, two air inlet fans are provided. At a position near the middle inside the device housing, a dust-proof mechanism is fixedly provided. At a position on the side of the device housing near the dust-proof mechanism, a plurality of connecting bars are fixedly provided. Inside the plurality of connecting bars, a heat exchange mechanism is fixedly provided. The dynamic adjustment of the heat dissipation area is realized. By driving the lead screw by a servo motor to drive the heat dissipation plate to slide, the heat dissipation area can be flexibly changed according to the operating temperature of the device. It can quickly dissipate heat at high temperatures and reduce dust adhesion at low temperatures. And while adjusting the heat dissipation, it automatically removes dust. The moving rope rubs against the dust-proof net and cooperates with the dust suction device to effectively keep the ventilation smooth.

Description

Technical Field

[0001] The present invention relates to the technical field of refrigeration equipment, and particularly to a refrigeration equipment and its heat exchanger assembly. Background Art

[0002] In the field of refrigeration equipment, as the core component for heat exchange, the performance of the heat exchanger directly affects the operating efficiency and stability of the refrigeration equipment. Existing heat exchangers usually adopt a structural form in which a large number of heat dissipation fins with uniform and unchanging specifications are arranged outside the heat dissipation copper tubes. By accelerating the air flow rate on the surface of the heat dissipation fins, efficient heat dissipation is achieved. However, this traditional heat exchanger has obvious technical defects in the actual application process: Firstly, after long-term use, dust is extremely likely to adhere to the surface of the heat dissipation fins, and these dusts will form a heat insulation layer on the fin surface, hindering the effective transfer of heat and resulting in a significant decrease in the heat dissipation efficiency of the heat exchanger; Secondly, the accumulation of dust will block the gaps between the fins, reducing the ventilation effect, making the air unable to fully contact the heat dissipation fins, and further weakening the heat dissipation performance; In addition, the structure of the heat dissipation fins of the traditional heat exchanger is fixed and cannot dynamically adjust the heat dissipation area according to the actual heat dissipation requirements. As a result, when the heat dissipation requirement is low, too much exposed area will lead to an exacerbation of the dust adhesion problem, while when the heat dissipation requirement is high, the fixed heat dissipation area is difficult to meet the requirements of rapid heat dissipation. Therefore, it is urgent to develop a new type of heat exchanger assembly and refrigeration equipment that can dynamically adjust the heat dissipation area and effectively solve the dust adhesion problem to improve the overall performance and service life of the refrigeration equipment. Summary of the Invention

[0003] Aiming at the deficiencies of the prior art, the present invention provides a refrigeration equipment and its heat exchanger assembly, which solves the problems of easy dust accumulation, low heat dissipation efficiency, and inability to dynamically adjust the heat dissipation area of the heat dissipation fins of the traditional heat exchanger.

[0004] To achieve the above objectives, the present invention is realized through the following technical solutions: A refrigeration equipment and its heat exchanger assembly, including an equipment housing and the heat exchanger assembly of the refrigeration equipment. The heat exchanger assembly includes a heat exchange mechanism. An air inlet is fixedly arranged on one side inside the equipment housing. Two air inlet fans are arranged on one side of the equipment housing close to the air inlet. A dust prevention mechanism is fixedly arranged at a position close to the middle inside the equipment housing. A plurality of connecting bars are fixedly arranged at a position of the equipment housing close to the dust prevention mechanism. The heat exchange mechanism is fixedly arranged inside the plurality of connecting bars;

[0005] The heat exchange mechanism includes a heat exchange frame. Multiple sliding grooves are provided at both the upper and lower ends of the heat exchange frame. Multiple moving rotating shafts are slidably arranged inside the multiple sliding grooves. Fixed rotating shafts are fixedly arranged at both the upper and lower ends of the heat exchange frame near one side of the multiple moving rotating shafts. Between every two of the multiple moving rotating shafts in the vertical direction, a first heat dissipation tube is fixedly arranged. Between every two of the multiple fixed rotating shafts in the vertical direction, a second heat dissipation tube is fixedly arranged. First heat dissipation plates are fixedly sleeved on the outer surfaces of the multiple first heat dissipation tubes. Second heat dissipation plates are fixedly sleeved on the outer surfaces of the multiple second heat dissipation tubes. The multiple first heat dissipation plates are slidably connected to the multiple second heat dissipation plates respectively. Bellows are fixedly connected in a staggered manner between the upper and lower ends of the multiple first heat dissipation tubes and the upper and lower ends of the adjacent second heat dissipation tubes.

[0006] Preferably, the dust prevention mechanism includes a dust suction frame. A dust prevention net is fixedly arranged inside the dust suction frame. A lifting frame is slidably arranged at a position near the dust prevention net inside the dust suction frame. Two reset springs are fixedly arranged at the lower end of the lifting frame. A pull-down rope is fixedly arranged at the middle position of the lower end of the lifting frame.

[0007] Preferably, multiple moving ropes are fixedly connected inside the lifting frame. The multiple moving ropes closely adhere to the surface of the dust prevention net.

[0008] Preferably, two air extraction pipes are fixedly arranged at the lower end of the dust suction frame. Both of the two air extraction pipes are connected to an external dust suction device.

[0009] Preferably, two moving plates are respectively fixedly arranged between the upper end of the upper layer and the lower end of the lower layer of the multiple moving rotating shafts. Two servo motors are fixedly arranged at both the upper and lower ends of the heat exchange frame. Screws are fixedly arranged at the output ends of the four servo motors. The four screws are respectively threadedly sleeved in the two moving plates in pairs. The other end of the pull-down rope penetrates through the dust suction frame and is fixedly connected to one of the two moving plates at the lower end.

[0010] Preferably, two supporting blocks are fixedly arranged at both the upper and lower ends of the heat exchange frame. The four screws are respectively rotatably arranged inside the four supporting blocks.

[0011] Preferably, the multiple first heat dissipation tubes, the multiple second heat dissipation tubes and the multiple bellows are connected to form a connected pipeline. Transmission pipelines are fixedly arranged at both ends of the connected pipeline. An expansion valve and a compressor are respectively fixedly connected to the two transmission pipelines.

[0012] The present invention provides a refrigeration device and its heat exchanger assembly, having the following beneficial effects:

[0013] The present invention provides a refrigeration device and its heat exchanger assembly. In the heat exchanger assembly of this refrigeration device, a servo motor drives a lead screw to rotate, driving a moving plate and a moving rotating shaft to move, realizing the relative sliding of the first heat dissipation plate and the second heat dissipation plate, and thus offsetting the first heat dissipation pipe and the second heat dissipation pipe from each other. This design can dynamically adjust the heat dissipation area according to actual heat dissipation requirements. When the operating temperature of the device is too high and the heat dissipation rate is low, the contact area between the heat dissipation plate and the air can be increased to significantly improve the heat dissipation efficiency; while when the heat dissipation requirement decreases, the heat dissipation plates can be controlled to overlap to reduce the exposed area and effectively reduce the dust adhesion amount, taking into account both the heat dissipation performance and the dust prevention effect.

[0014] The present invention provides a refrigeration device and its heat exchanger assembly, which integrates an innovative dust prevention mechanism and a linkage structure of the heat exchanger assembly. During the process of the heat exchanger assembly adjusting the heat dissipation area, the moving plate drives the lifting frame to move through a pull-down rope, and the moving rope on the lifting frame scrapes the surface of the dust-proof net, scraping off the attached dust, and connecting to an external dust suction device through a dust suction frame and an air extraction pipe to suck away the dust in time. This automatic dust removal mechanism can effectively prevent the ventilation effect from being reduced due to dust accumulation on the dust-proof net, continuously ensure the smooth intake air of the heat exchanger, ensure the long-term stable operation of the refrigeration device, and reduce the manual maintenance cost and frequency. Brief Description of the Drawings

[0015] Figure 1 is an axonometric schematic diagram of the present invention;

[0016] Figure 2 is a sectional axonometric schematic diagram of the present invention;

[0017] Figure 3 is a partial axonometric schematic diagram of the present invention;

[0018] Figure 4 is an axonometric schematic diagram of the dust prevention mechanism of the present invention;

[0019] Figure 5 is an axonometric schematic diagram of the heat exchange mechanism of the present invention;

[0020] Figure 6 of the present invention Figure 5 is an enlarged schematic diagram at position A;

[0021] Figure 7 is an axonometric schematic diagram of the heat exchange frame of the present invention;

[0022] Figure 8 is a partial axonometric schematic diagram of the heat exchange mechanism of the present invention.

[0023] Among them, 1. Air inlet; 2. Equipment housing; 3. Inlet fan; 4. Dust-proof mechanism; 5. Heat exchange mechanism; 6. Connecting strip; 7. Expansion valve; 8. Compressor; 9. Transmission pipeline; 401. Moving rope; 402. Dust-proof net; 403. Dust suction frame; 404. Lifting frame; 405. Return spring; 406. Suction duct; 407. Pull-down rope; 501. First heat dissipation plate; 502. Moving plate; 503. Heat exchange frame; 504. Servo motor; 505. Fixed rotating shaft; 506. Moving rotating shaft; 507. First heat dissipation pipe; 508. Second heat dissipation pipe; 509. Second heat dissipation plate; 510. Bellows; 511. Lead screw; 512. Support block; 513. Slide groove. Detailed implementation manners

[0024] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0025] As Figure 1 and Figure 2 shown, an embodiment of the present invention provides a refrigeration device, including an equipment housing. On one side inside the equipment housing, an air inlet 1 is fixedly arranged. On one side of the equipment housing close to the air inlet 1, two inlet fans 3 are arranged. At a position close to the middle inside the equipment housing, a dust-proof mechanism 4 is fixedly arranged. At a position on the equipment housing close to the dust-proof mechanism 4, a plurality of connecting strips 6 are fixedly arranged. Inside the plurality of connecting strips 6, a heat exchange mechanism 5 is fixedly arranged;

[0026] Specifically, in the above specific embodiment, external air enters the equipment through the air inlet 1 on the equipment housing. The inlet fans 3 operate to accelerate the air flow, so that the air quickly passes through the dust-proof mechanism 4 to filter dust and then flows to the heat exchange mechanism 5. The connecting strips 6 are used to fix the heat exchange mechanism 5 to ensure its stable installation inside the equipment and provide a structural basis for the subsequent heat exchange process. This overall structural design makes the air circulation path of the refrigeration device clear. The inlet fans 3 ensure the air flow rate and velocity, providing sufficient air conditions for subsequent heat dissipation; the orderly arrangement of the dust-proof mechanism 4 and the heat exchange mechanism 5 can first remove dust from the air, avoid dust affecting the heat exchange effect, and improve the overall operation efficiency and stability of the refrigeration device.

[0027] As Figure 4As shown in the figure, the dust-proof mechanism 4 includes a dust suction frame 403. Inside the dust suction frame 403, a dust-proof net 402 is fixedly arranged. A lifting frame 404 is slidably arranged at a position close to one side of the dust-proof net 402 inside the dust suction frame 403. At the lower end of the lifting frame 404, two reset springs 405 are fixedly arranged. At the middle position of the lower end of the lifting frame 404, a pull-down rope 407 is fixedly arranged. Inside the lifting frame 404, a plurality of moving ropes 401 are fixedly connected. The plurality of moving ropes 401 closely adhere to the surface of the dust-proof net 402. At the lower end of the dust suction frame 403, two air extraction pipes 406 are fixedly arranged. Both of the two air extraction pipes 406 are connected to an external dust suction device;

[0028] Specifically, in the above specific embodiment, the dust suction frame 403 is integrally formed of ABS engineering plastic. The dust-proof net 402 is fixedly arranged inside the dust suction frame 403 through a card slot. The dust-proof net 402 is made of 304 stainless steel material with a mesh number of 100. When air passes through the dust suction frame 403, the dust-proof net 402 intercepts the dust in the air. When the moving plate 502 of the heat exchange mechanism 5 moves, the lifting frame 404 is pulled by the pull-down rope 407 to move downward against the elastic force of the reset spring 405. The moving ropes 401 inside the lifting frame 404 that closely adhere to the surface of the dust-proof net 402 will scrape the surface of the dust-proof net 402, scraping off the attached dust. The scraped dust is sucked away by the external dust suction device through the air extraction pipe 406 at a negative pressure of 1500 Pa. When the moving plate 502 moves in the reverse direction, the lifting frame 404 is reset upward under the action of the reset spring 405, preparing for the next dust removal. The dust-proof mechanism 4 realizes the function of automatic dust removal, eliminating the need for manual frequent cleaning of the dust-proof net 402, reducing the maintenance cost and labor intensity. Through the linkage with the heat exchange mechanism 5, dust removal is carried out while the heat exchange mechanism 5 adjusts the heat dissipation area, ensuring that the ventilation effect of the dust-proof net 402 is always good, continuously providing clean air for the heat exchange mechanism 5, and thus guaranteeing the stable operation of the refrigeration equipment.

[0029] As Figures 5 - 8As shown, a refrigeration device includes a heat exchanger assembly of the refrigeration device. The heat exchanger assembly includes a heat exchange mechanism 5. The heat exchange mechanism 5 includes a heat exchange frame 503. A plurality of sliding grooves 513 are formed at both the upper and lower ends of the heat exchange frame 503. A movable rotating shaft 506 is slidably disposed inside each of the plurality of sliding grooves 513. Fixed rotating shafts 505 are fixedly disposed at both the upper and lower ends of the heat exchange frame 503 near one side of the plurality of movable rotating shafts 506. A first heat dissipation tube 507 is fixedly disposed between every two of the plurality of movable rotating shafts 506 in the vertical direction. A second heat dissipation tube 508 is fixedly disposed between every two of the plurality of fixed rotating shafts 505 in the vertical direction. A first heat dissipation plate 501 is fixedly sleeved on the outer surface of each of the plurality of first heat dissipation tubes 507. A second heat dissipation plate 509 is fixedly sleeved on the outer surface of each of the plurality of second heat dissipation tubes 508. The plurality of first heat dissipation plates 501 are slidably connected to the plurality of second heat dissipation plates 509 respectively. Bellows 510 are fixedly connected in an alternating manner between the upper and lower ends of each of the plurality of first heat dissipation tubes 507 and the upper and lower ends of the adjacent second heat dissipation tubes 508.

[0030] Specifically, in the above specific embodiment, the first heat dissipation tube 507 is made of copper, with an outer diameter of 10 mm and a wall thickness of 1 mm. The second heat dissipation tube 508 is also made of copper, with an outer diameter of 10 mm and a wall thickness of 1 mm. The first heat dissipation plate 501 is made of an aluminum corrugated plate, with dimensions of 150 mm × 50 mm × 0.5 mm. The second heat dissipation plate 509 has the same structure as the first heat dissipation plate 501. The bellows 510 are made of stainless steel, with an inner diameter of 10 mm and a telescopic length of 50 mm. During the heat exchange process, the refrigerant circulates in the communication pipeline composed of the first heat dissipation tube 507, the second heat dissipation tube 508, and the bellows 510. When it is necessary to adjust the heat dissipation area, the servo motor 504 drives the lead screw 511 to rotate. The lead screw 511 is in threaded cooperation with the moving plate 502, causing the moving plate 502 to move. The moving plate 502 drives the movable rotating shaft 506 to slide in the sliding groove 513, so that the first heat dissipation tube 507 and the second heat dissipation tube 508 are offset from each other, and the first heat dissipation plate 501 and the second heat dissipation plate 509 slide relative to each other, increasing or decreasing the contact area with the air. The bellows 510 have telescopic properties and can adapt to the relative movement of the first heat dissipation tube 507 and the second heat dissipation tube 508 to ensure the flow of the refrigerant. This adjustable heat exchange structure can dynamically adjust the heat dissipation area according to the actual heat dissipation requirements of the refrigeration device. When the temperature of the device is relatively high, increasing the heat dissipation area can quickly dissipate heat and improve the heat dissipation efficiency. When the temperature of the device is relatively low, reducing the heat dissipation area can reduce dust adhesion and extend the service life of the device, enabling the refrigeration device to operate efficiently under different working conditions.

[0031] As Figures 5 - 8As shown in the figure, two moving plates 502 are fixedly arranged between the upper ends and the lower ends of the upper layer and the lower layer of the multiple moving rotating shafts 506 respectively. Two servo motors 504 are fixedly arranged at both the upper and lower ends of the heat exchange frame 503. The output ends of the four servo motors 504 are fixedly provided with lead screws 511. The four lead screws 511 are respectively thread sleeved in the two moving plates 502 in pairs. The other end of the lower pull rope 407 penetrates through the dust suction frame 403 and is fixedly connected to one of the lower ends of the two moving plates 502. Two support blocks 512 are fixedly arranged at both the upper and lower ends of the heat exchange frame 503. The four lead screws 511 are respectively rotatably arranged inside the four support blocks 512. The multiple first heat dissipation tubes 507, the multiple second heat dissipation tubes 508 and the multiple bellows tubes 510 are interconnected to form a connected pipeline. Both ends of the connected pipeline are fixedly provided with transmission pipelines 9. The two transmission pipelines 9 are respectively fixedly connected with an expansion valve 7 and a compressor 8;

[0032] Specifically, in the above specific embodiment, the servo motor 504 serves as a power source, and the rotational motion is converted into the linear motion of the moving plate 502 through the lead screw 511. The support block 512 provides rotational support for the lead screw 511 to ensure the stability of the rotation of the lead screw 511. The moving plate 502 is connected to the moving rotating shaft 506 to drive the moving rotating shaft 506 to move, realizing the relative movement of the heat dissipation plate and the heat dissipation tube. The lower pull rope 407 connects the moving plate 502 and the lifting frame 404, and drives the lifting frame 404 to move when the moving plate 502 moves, realizing the linkage between the heat exchange mechanism 5 and the dust prevention mechanism 4. The refrigerant is connected to the expansion valve 7 and the compressor 8 through the transmission pipeline 9. The transmission pipeline 9 is made of copper pipe with an outer diameter of 12 mm. The two transmission pipelines 9 are respectively fixedly connected with the expansion valve 7 and the compressor 8 through flanges. The model of the expansion valve 7 is ALCO-R22, and the model of the compressor 8 is Copeland ZR16M3-EPD-522, forming a complete refrigeration cycle loop. This structural design ensures the accuracy and stability of the adjustment process of the heat exchange mechanism 5. The cooperation of the servo motor 504 and the lead screw 511 can accurately control the moving distance of the moving plate 502, thereby accurately adjusting the heat dissipation area. The linkage design between the heat exchange mechanism 5 and the dust prevention mechanism 4 enables the equipment to complete the dust removal work while adjusting the heat dissipation, improving the automation degree and operation efficiency of the equipment and reducing the complexity of equipment maintenance.

[0033] Working principle: During the operation of this refrigeration equipment, first, external air is inhaled through the air inlet 1, and the inlet fan 3 accelerates the air flow to make the air enter the equipment interior. When the air passes through the dust-proof mechanism 4, the dust-proof net 402 intercepts the dust in the air to prevent the dust from entering the heat exchanger assembly. When the controller detects that the temperature inside the heat exchanger assembly is too high and the heat dissipation efficiency is insufficient, it sends an instruction to the servo motor 504. The servo motor 504 starts and drives the lead screw 511 to rotate. When the lead screw 511 rotates, the moving plate 502 threadedly connected to it moves along the direction of the lead screw 511. The moving plate 502 drives the moving rotating shaft 506 to slide in the chute 513, causing the first heat dissipation tube 507 and the second heat dissipation tube 508 to offset from each other, and the first heat dissipation plate 501 and the second heat dissipation plate 509 to slide relative to each other. The originally overlapping parts are separated, increasing the contact area with the air, thereby accelerating heat exchange and improving the heat dissipation efficiency.

[0034] While the moving plate 502 is moving, the downward pull rope 407 is pulled, driving the lifting frame 404 to move downward against the elastic force of the reset spring 405. The moving rope 401 inside the lifting frame 404 is in close contact with the surface of the dust-proof net 402. During the movement of the lifting frame 404, the moving rope 401 scrapes the surface of the dust-proof net 402 to scrape off the attached dust. The dust suction frame 403 is connected to an external dust suction device through the air extraction pipe 406 to suck away the scraped-off dust in a timely manner, keep the dust-proof net 402 clean, and ensure smooth ventilation. When the heat dissipation efficiency reaches the expectation, the controller controls the servo motor 504 to reverse again, driving the moving plate 502 to move in the reverse direction, making the first heat dissipation plate 501 and the second heat dissipation plate 509 overlap again, reducing the heat dissipation area and reducing dust adhesion. At the same time, the lifting frame 404 resets upward under the action of the reset spring 405 to prepare for the next dust removal. During the whole process, the heat exchanger assembly and the dust-proof mechanism 4 work together to achieve the dual functions of efficient heat dissipation and automatic dust removal, ensuring the stable operation of the refrigeration equipment.

[0035] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A refrigeration device and its heat exchanger assembly, including a device housing (2) and the heat exchanger assembly of the refrigeration device, the heat exchanger assembly including a heat exchange mechanism (5), characterized in that: On one side inside the device housing (2), an air inlet (1) is fixedly arranged. On one side of the device housing (2) near the air inlet (1), two air inlet fans (3) are arranged. At a position near the middle inside the device housing (2), a dust prevention mechanism (4) is fixedly arranged. At a position on the device housing (2) near the dust prevention mechanism (4), a plurality of connecting bars (6) are fixedly arranged. Inside the plurality of connecting bars (6), a heat exchange mechanism (5) is fixedly arranged; The heat exchange mechanism (5) includes a heat exchange frame (503). A plurality of sliding grooves (513) are formed at both the upper and lower ends of the heat exchange frame (503). Inside the plurality of sliding grooves (513), moving rotating shafts (506) are slidably arranged. At positions on both the upper and lower ends of the heat exchange frame (503) near the plurality of moving rotating shafts (506), fixed rotating shafts (505) are fixedly arranged. Between every two of the plurality of moving rotating shafts (506) in the vertical direction, a first heat dissipation pipe (507) is fixedly arranged. Between every two of the plurality of fixed rotating shafts (505) in the vertical direction, a second heat dissipation pipe (508) is fixedly arranged. On the outer surfaces of the plurality of first heat dissipation pipes (507), first heat dissipation plates (501) are fixedly sleeved. On the outer surfaces of the plurality of second heat dissipation pipes (508), second heat dissipation plates (509) are fixedly sleeved. The plurality of first heat dissipation plates (501) are slidably connected to the plurality of second heat dissipation plates (509) respectively. Between the upper and lower ends of the plurality of first heat dissipation pipes (507) and the upper and lower ends of the adjacent second heat dissipation pipes (508), bellows (510) are fixedly connected in a staggered manner.

2. The refrigeration device and its heat exchanger assembly according to claim 1, characterized in that: The dust prevention mechanism (4) includes a dust suction frame (403). Inside the dust suction frame (403), a dust prevention net (402) is fixedly arranged. At a position on one side of the dust suction frame (403) near the dust prevention net (402), a lifting frame (404) is slidably arranged. At the lower end of the lifting frame (404), two reset springs (405) are fixedly arranged. At the middle position of the lower end of the lifting frame (404), a pull-down rope (407) is fixedly arranged.

3. A refrigeration device and its heat exchanger assembly according to claim 2, characterized in that: Inside the lifting frame (404), a plurality of moving ropes (401) are fixedly connected. The plurality of moving ropes (401) closely adhere to the surface of the dust prevention net (402).

4. A refrigeration device and its heat exchanger assembly according to claim 2, characterized in that: At the lower end of the dust suction frame (403), two air extraction pipes (406) are fixedly arranged. Both of the two air extraction pipes (406) are connected to an external dust suction device.

5. A refrigeration device and its heat exchanger assembly according to claim 2, characterized in that: Between the upper end of the upper layer and the lower end of the lower layer of the plurality of moving rotating shafts (506), two moving plates (502) are respectively fixedly arranged. At both the upper and lower ends of the heat exchange frame (503), two servo motors (504) are fixedly arranged. At the output ends of the four servo motors (504), lead screws (511) are fixedly arranged. The four lead screws (511) are respectively threadedly sleeved in the two moving plates (502) in pairs. The other end of the pull-down rope (407) penetrates through the dust suction frame (403) and is fixedly connected to one of the two moving plates (502) at the lower end.

6. The refrigeration device and its heat exchanger assembly according to claim 5, characterized in that: Two support blocks (512) are fixedly arranged at both the upper and lower ends of the heat exchange rack (503), and the four lead screws (511) are respectively rotatably arranged inside the four support blocks (512).

7. A refrigeration device and its heat exchanger assembly according to claim 1, characterized in that: A plurality of the first heat dissipation tubes (507), a plurality of the second heat dissipation tubes (508) and a plurality of corrugated tubes (510) are connected to each other to form a connected pipeline, and transmission pipelines (9) are fixedly arranged at both ends of the connected pipeline. The two transmission pipelines (9) are respectively fixedly connected with an expansion valve (7) and a compressor (8).

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