Centrifugal evaporative condenser with dry-wet combination anti-freezing function and application thereof

Abstract

The present application relates to heat exchange equipment technical field, specifically, it relates to dry and wet combined type centrifugal evaporative condenser with anti-freezing function and application thereof, including condensing pipe, drive mechanism and heat exchange pipe arranged in its inside and centrifugal fan arranged at the top end of condensing pipe, condensing pipe includes bottom frame, bottom pipe, rotating part and fixed pipe arranged in turn from bottom to top, the dry and wet combined type centrifugal evaporative condenser with anti-freezing function and application thereof, when reciprocating screw rod drive tooth plate reciprocates displacement, rotating part is driven to reciprocate rotation through transmission part, and the rotary motion of motor is converted into reciprocating scraping movement of scraper along the track of heat exchange pipe outer wall, then continuously cleans heat exchange pipe outer wall in operation, effectively prevents scale formation and accumulation, keeps pipe wall clean, ensures that heat transfer efficiency is long-term stable, avoids the heat transfer performance attenuation caused by fouling, reduces maintenance requirement.

Description

Technical Field

[0001] This invention relates to the field of heat exchange equipment technology, and more specifically, to a dry-wet combined centrifugal evaporative condenser with antifreeze function and its application. Background Technology

[0002] Evaporative condensers are high-efficiency and energy-saving heat exchange equipment that combines water cooling and air cooling technologies. They use circulating water to spray the outer wall of the coil and a fan to force ventilation, causing the water to evaporate and absorb heat while carrying away the heat of the high-temperature medium inside the tube. They have a compact structure that integrates a spray system, heat exchange coils, and axial flow fan, and are suitable for refrigeration, chemical, power and other fields.

[0003] Patent application CN202411856570.0 discloses a multi-stage heat exchange evaporative condenser, including a shell with an air inlet grille on its inner walls. Inside the shell are evaporative heat exchange coils, a spray element, and a pre-cooling heat exchange coil. The spray element is located above the evaporative heat exchange coil, and the pre-cooling heat exchange coil is located above the spray element and connected to it. An induced draft fan is located at the top of the shell. A vertically moving and rotating scraping and collecting mechanism scrapes and collects impurities adhering to the inner wall of the filter cartridge, while a vertically moving and rotating backwashing mechanism creates a vortex of cooling water from the outside in, which backwashes the filter cartridge.

[0004] However, existing evaporative condensers do not isolate the wet and dry areas, and the low-temperature airflow blows directly onto the wet film of the coil. The water film is prone to freezing and expansion, which can lead to weld cracking and tube deformation. Traditional antifreeze methods require shutting down the spray and switching to pure air cooling, which will cause a sharp drop in heat exchange capacity. In addition, traditional evaporative condensers use gravity to make the water flow, which makes the liquid film thinner at the top and thicker at the bottom. Calcium and magnesium ions accumulate and form scale, which affects heat transfer efficiency and requires frequent shutdowns for acid cleaning.

[0005] In view of this, we propose a dry-wet combined centrifugal evaporative condenser with antifreeze function and its application. Summary of the Invention

[0006] The purpose of this invention is to provide a dry-wet combined centrifugal evaporative condenser with antifreeze function and its application. By fixing the inner partition of the tube to divide the heat exchange tube into upper and lower regions, and cooperating with the transmission part to drive the rotating part to rotate back and forth, the rotational motion of the motor is converted into the reciprocating scraping motion of the scraper along the trajectory of the outer wall of the heat exchange tube, so as to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] A dry-wet combined centrifugal evaporative condenser with antifreeze function includes condenser tubes, a drive mechanism and heat exchange tubes disposed inside them, and a centrifugal fan disposed at the top of the condenser tubes.

[0009] The condenser tube includes a bottom frame, a bottom tube, a rotating part and a fixed tube arranged sequentially from bottom to top. The inner side of the fixed tube is provided with a circular cover, and the bottom end of the outer wall of the fixed tube is provided with several through grooves that run through the inside and outside.

[0010] After the centrifugal fan is started, external airflow flows into the gap between the fixed tube and the circular cover through the through slot, cooling the upper part of the heat exchange tube.

[0011] The rotating part includes a rotating tube, a ring tooth sleeved on the outer wall of the rotating tube, a pair of sliders arranged symmetrically on the inner wall of the rotating tube, and several scrapers arranged on the sliders.

[0012] As the rotating tube in this configuration rotates, several scrapers rotate with it and move along the trajectory of the outer wall of the heat exchange tube, and the position of the slide bar is also adjusted synchronously.

[0013] The drive mechanism includes a motor, a spray pipe driven by the motor and a reciprocating lead screw, a toothed plate sleeved on the outside of the reciprocating lead screw and a transmission part disposed on the outside of the toothed plate.

[0014] After the motor in this configuration starts, the spray pipe rotates and throws the coolant toward the heat exchange tube. The reciprocating screw rotates and drives the toothed plate to move back and forth laterally. The rotating tube is driven to rotate through the transmission part and the ring gear.

[0015] In the technical solution of the present invention, the bottom tube is welded and fixed to the top surface of the bottom frame, and a liquid guide plate for discharging coolant is welded and fixed to the inner wall of the bottom tube, and a drain pipe is snapped and fixed to the bottom end of the liquid guide plate.

[0016] This design, with its guide plate, allows the coolant flowing out of the drive mechanism to enter the drain pipe, thus facilitating the recycling of the coolant.

[0017] In the technical solution of the present invention, the rotating tube is rotatably connected between the bottom tube and the fixed tube, and two transverse T-shaped sliding grooves are provided on the inner wall of the rotating tube, and the ring teeth are snapped and fixed on the outer wall of the rotating tube.

[0018] In the technical solution of the present invention, the slide bar is slidably connected to the inside of the slide groove, and the front and rear slide bars respectively abut against the bottom and top ends of the front and rear slide grooves. The scraper is rotatably connected to the inside of the slide bar, and the size of the scraper is adapted to the outer wall of the heat exchange tube.

[0019] The above setup uses several scrapers to clean the outer wall of the heat exchange tubes, thus preventing scale buildup on the outside of the tubes and ensuring the heat exchange efficiency of the heat exchange tubes.

[0020] In the technical solution of the present invention, a connecting frame is fixedly connected between the outer wall of the fixed pipe and the outer wall of the bottom pipe by bolts. A partition is welded to the inner wall of the fixed pipe near the bottom end. Several regularly distributed and interconnected through grooves are opened on the outer wall of the fixed pipe above the partition. The round cover is snapped and fixed to the top surface of the partition.

[0021] This setup uses a centrifugal fan to allow external airflow to flow through the channel into the gap between the fixed tube and the shroud, cooling the upper half of the heat exchange tube before sending the heat back to the centrifugal fan for discharge.

[0022] In the technical solution of the present invention, the motor is fixedly connected to the bracket on the bottom surface of the inner wall of the base frame by bolts, and a worm gear is coaxially connected to the output shaft of the motor. A worm wheel is engaged on the outer side of the worm gear, and the worm wheel is snapped and fixed to the outer wall of the spray pipe.

[0023] In the technical solution of the present invention, the spray pipe is rotatably connected to the top surface of the bottom frame, and a number of regularly distributed nozzles are threadedly connected to the outer wall of the spray pipe. The reciprocating screw is snapped and fixed to the front end of the worm gear, and the toothed plate is sleeved on the outside of the reciprocating screw.

[0024] The above setup, through the rotating spray pipe, allows the coolant to be thrown against the tube wall of the heat exchange tube under the action of centrifugal force to form a water film. This avoids the situation in traditional evaporative condensers where the water flows down the tube wall due to gravity, resulting in a thin liquid film at the top and a thick liquid film at the bottom, which would hinder heat transfer.

[0025] In the technical solution of the present invention, the transmission part includes a rotating shaft rotatably connected inside the bottom frame, shaft teeth snapped and fixed on the outer wall of the rotating shaft and meshing with the toothed plate, and end teeth snapped and fixed on the top of the rotating shaft and meshing with the ring teeth.

[0026] This setup transmits motor power through a transmission unit, and works in conjunction with a reciprocating lead screw to achieve the reciprocating rotation of the rotating part.

[0027] In the technical solution of the present invention, the driving mechanism further includes a positioning plate that is snapped and fixed to the upper and lower ends of the bottom frame and an inlet pipe sleeved on the bottom end of the spray pipe. The top end of the reciprocating screw is rotatably connected to the outer wall of the positioning plate, and the toothed plate is slidably connected to the inside of the positioning plate.

[0028] This feature ensures the stability of the toothed plate's movement through a positioning plate.

[0029] In the technical solution of the present invention, the centrifugal fan is fixedly connected to the top surface of the fixed pipe by bolts, the upper and lower ends of the heat exchange tube are respectively clamped and fixed to the outer wall of the fixed pipe and the outer wall of the bottom pipe, and the middle part of the heat exchange tube is clamped and fixed to the inside of the partition plate.

[0030] This design allows for heat exchange at both ends of the heat exchange tubes via air cooling and liquid cooling, respectively, and separates the dry and wet parts through a partition to prevent the water film on the outer wall of the evaporative condenser's heat exchange tubes from freezing in cold weather.

[0031] On the other hand, the present invention also provides the application of a dry-wet combined centrifugal evaporative condenser with antifreeze function in heat exchange equipment with antifreeze function.

[0032] Compared with the prior art, the beneficial effects of the present invention are:

[0033] 1. The dry-wet combined centrifugal evaporative condenser with antifreeze function and its application: the fixed inner tube partition divides the heat exchange tube into upper and lower areas, with the lower part being the centrifugal spray area and the upper part being the air-cooled area. This prevents cold air from directly blowing the water film adhering to the outer wall of the heat exchange tube in a low-temperature environment, which could lead to cracking and deformation of the heat exchange tube weld.

[0034] 2. This dry-wet combined centrifugal evaporative condenser with antifreeze function and its application utilize a reciprocating screw to drive a toothed plate to move back and forth. This, in turn, drives a rotating part to rotate reciprocally via a transmission unit. The rotational motion of the motor is converted into a reciprocating scraping motion of a scraper along the outer wall of the heat exchange tube. This continuously cleans the outer wall of the heat exchange tube during operation, effectively preventing scale formation and accumulation, keeping the tube wall clean, ensuring long-term stable heat transfer efficiency, avoiding heat exchange performance degradation due to scaling, and reducing maintenance requirements. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0036] Figure 2 This is a cross-sectional view of the overall structure of the present invention;

[0037] Figure 3 This is a cross-sectional schematic diagram of the condenser tube in this invention;

[0038] Figure 4 This is a cross-sectional side view of the condenser tube in this invention;

[0039] Figure 5 For the present invention Figure 4 An enlarged schematic diagram of part A in the middle;

[0040] Figure 6 This is a partial cross-sectional schematic diagram of the condenser tube in this invention;

[0041] Figure 7 This is a cross-sectional schematic diagram of the rotating part in this invention;

[0042] Figure 8 This is a partial structural diagram of the rotating part in this invention;

[0043] Figure 9 This is a schematic diagram of the drive mechanism in this invention;

[0044] Figure 10 This is a schematic diagram of the transmission unit in the present invention;

[0045] Explanation of reference numerals in the attached figures:

[0046] 100. Condenser tube; 110. Base frame; 120. Bottom tube; 121. Liquid guide plate; 130. Drain tube; 140. Rotating part; 141. Rotating tube; 1410. Slide groove; 142. Ring tooth; 143. Sliding bar; 144. Scraper; 150. Fixed tube; 151. Through groove; 152. Partition; 160. Circular cover; 170. Connecting frame;

[0047] 200. Drive mechanism; 210. Motor; 220. Worm gear; 230. Worm wheel; 240. Spray pipe; 241. Spray head; 250. Reciprocating screw; 260. Gear plate; 270. Transmission unit; 271. Rotating shaft; 272. Shaft gear; 273. End gear; 280. Positioning plate; 290. Liquid inlet pipe;

[0048] 300. Centrifugal fan;

[0049] 400. Heat exchange tube. Detailed Implementation

[0050] The technical solutions of this invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0051] Please see Figures 1-6 As shown, this embodiment provides the following technical solution:

[0052] The application of a dry-wet combined centrifugal evaporative condenser with antifreeze function in heat exchange equipment with antifreeze function includes a condenser tube 100, a drive mechanism 200 and a heat exchange tube 400 disposed inside it, and a centrifugal fan 300 disposed at the top of the condenser tube 100.

[0053] Specifically, the condenser tube 100 includes a bottom frame 110, a bottom tube 120, a rotating part 140 and a fixed tube 150 arranged sequentially from bottom to top. The inner side of the fixed tube 150 is provided with a circular cover 160, and the bottom end of the outer wall of the fixed tube 150 is provided with several through grooves 151 that are open to the inside and outside.

[0054] Furthermore, the bottom pipe 120 is welded and fixed to the top surface of the bottom frame 110, and a liquid guide plate 121 for draining coolant is welded and fixed to the inner wall of the bottom pipe 120. A drain pipe 130 is snapped and fixed to the bottom end of the liquid guide plate 121.

[0055] Furthermore, a connecting bracket 170 is fixedly connected between the outer walls of the fixed pipe 150 and the bottom pipe 120 by bolts. A partition 152 is welded to the inner wall of the fixed pipe 150 near the bottom end. Several regularly distributed and interconnected through grooves 151 are opened on the outer wall of the fixed pipe 150 above the partition 152. The round cover 160 is snapped and fixed to the top surface of the partition 152.

[0056] Furthermore, the bottom frame 110 and the bottom tube 120 are used to ensure the strength of the bottom structure of the condenser tube 100, while the liquid guide plate 121 allows the coolant flowing out of the drive mechanism 200 to enter the interior of the drain pipe 130, thereby facilitating the recycling of the coolant. The connecting bracket 170 is used to fix the fixed tube 150 above the bottom tube 120. This setting, through the centrifugal fan 300, allows the external airflow to flow through the through groove 151 into the gap between the fixed tube 150 and the circular cover 160, to cool the upper half of the heat exchange tube 400, and then send the heat into the centrifugal fan 300 before being discharged.

[0057] Please see Figures 1-8 As shown, in this embodiment, the rotating part 140 includes a rotating tube 141, an annular tooth 142 sleeved on the outer wall of the rotating tube 141, a pair of sliders 143 centrally symmetrically arranged on the inner wall of the rotating tube 141, and a number of scrapers 144 arranged on the sliders 143. When the rotating tube 141 rotates, the scrapers 144 rotate with it and move along the trajectory of the outer wall of the heat exchange tube 400, and the position of the sliders 143 is also adjusted synchronously.

[0058] Specifically, the rotating tube 141 is rotatably connected between the bottom tube 120 and the fixed tube 150. Two transverse T-shaped sliding grooves 1410 are provided on the inner wall of the rotating tube 141, and the ring teeth 142 are snapped and fixed on the outer wall of the rotating tube 141.

[0059] Furthermore, the slide bar 143 is slidably connected to the inside of the slide groove 1410, and the front and rear slide bars 143 respectively abut against the bottom and top of the front and rear slide grooves 1410. The scraper 144 is rotatably connected to the inside of the slide bar 143, and the size of the scraper 144 is adapted to the outer wall of the heat exchange tube 400.

[0060] Furthermore, during the reciprocating rotation of the rotating tube 141, the sliding bar 143 is moved along with it by the sliding groove 1410, causing several scrapers 144 to move along the trajectory of the heat exchange tube 400. At this time, the sliding bar 143 will move up and down inside the sliding groove 1410 to adjust the position of the scrapers 144. This setting cleans the outer wall of the heat exchange tube 400 with several scrapers 144 to prevent scale from forming on the outside of the tube wall, thereby ensuring the heat exchange efficiency of the heat exchange tube 400.

[0061] Please see Figures 1-10 As shown, in this embodiment, the drive mechanism 200 includes a motor 210, a spray pipe 240 driven by the motor 210, a reciprocating screw 250, a toothed plate 260 sleeved on the outside of the reciprocating screw 250, and a transmission part 270 disposed on the outside of the toothed plate 260. After the motor 210 is started, the spray pipe 240 rotates and throws the coolant toward the heat exchange pipe 400. After the reciprocating screw 250 rotates, it drives the toothed plate 260 to move back and forth laterally. The transmission part 270, in conjunction with the ring tooth 142, drives the rotating pipe 141 to rotate.

[0062] Specifically, the motor 210 is fixedly connected to the bracket on the bottom surface of the inner wall of the base frame 110 by bolts. A worm gear 220 is coaxially connected to the output shaft of the motor 210. A worm wheel 230 is engaged on the outer side of the worm gear 220. The worm wheel 230 is snapped and fixed to the outer wall of the spray pipe 240.

[0063] Furthermore, the spray pipe 240 is rotatably connected to the top surface of the bottom frame 110, and several regularly distributed nozzles 241 are threadedly connected to the outer wall of the spray pipe 240. The reciprocating screw 250 is snapped and fixed to the front end of the worm gear 220, and the toothed plate 260 is sleeved on the outside of the reciprocating screw 250.

[0064] Furthermore, the drive mechanism 200 also includes a positioning plate 280 that is snapped and fixed to the upper and lower ends of the bottom frame 110 and an inlet pipe 290 that is sleeved on the bottom end of the spray pipe 240. The top end of the reciprocating screw 250 is rotatably connected to the outer wall of the positioning plate 280, and the toothed plate 260 is slidably connected to the inside of the positioning plate 280.

[0065] Furthermore, the motor 210 of the drive mechanism 200 is started, driving the worm gear 220 and the reciprocating screw 250 to rotate synchronously. When the worm gear 220 rotates, the meshing worm wheel 230 drives the spray pipe 240 to rotate. After the coolant is injected into the spray pipe 240 from the inlet pipe 290, it is thrown onto the tube wall of the heat exchange tube 400 by several nozzles 241, forming a water film on its surface and cooling the hot fluid inside the heat exchange tube 400. This setting, through the rotating spray pipe 240, allows the coolant to be thrown onto the tube wall of the heat exchange tube 400 under the action of centrifugal force to form a water film, avoiding the situation in traditional evaporative condensers where water flows down the tube wall due to gravity, resulting in a thin liquid film at the top and a thick liquid film at the bottom, which would cause the lower liquid film to be too thick and hinder heat transfer.

[0066] Please see Figures 1-10 As shown, in this embodiment, the transmission part 270 includes a rotating shaft 271 rotatably connected inside the bottom frame 110, a shaft tooth 272 snapped and fixed on the outer wall of the rotating shaft 271 and meshing with the toothed plate 260, and an end tooth 273 snapped and fixed on the top end of the rotating shaft 271 and meshing with the ring tooth 142.

[0067] Furthermore, the toothed plate 260 reciprocates back and forth as the reciprocating screw 250 rotates, while the meshing shaft teeth 272 drive the rotating shaft 271 to rotate. In turn, the end teeth 273, which rotate together, mesh with the ring teeth 142, driving the rotating tube 141 to rotate 180° and then return to its original position. This configuration realizes the transmission of power from the motor 210 through the transmission part 270, and in conjunction with the reciprocating screw 250, realizes the reciprocating rotation of the rotating part 140.

[0068] Please see Figures 1-2 As shown, in this embodiment, the centrifugal fan 300 is fixedly connected to the top surface of the fixed pipe 150 by bolts, the upper and lower ends of the heat exchange tube 400 are respectively snapped and fixed to the outer wall of the fixed pipe 150 and the outer wall of the bottom pipe 120, and the middle part of the heat exchange tube 400 is snapped and fixed to the inside of the partition plate 152.

[0069] Furthermore, after the centrifugal fan 300 is started, it is used to draw external airflow into the interior of the fixed tube 150 through the channel 151 and discharge the heat of the heat exchange tube 400. In this configuration, the upper and lower ends of the heat exchange tube 400 are cooled by air and liquid respectively, and the dry and wet are separated by the partition 152 to prevent the water film on the outer wall of the heat exchange tube 400 of the evaporative condenser from freezing when the weather is cold.

[0070] Finally, it should be noted that the motor 210 and centrifugal fan 300 involved in this invention are general standard parts or components known to those skilled in the art. Their structure and principle can be known to those skilled in the art through technical manuals or conventional experimental methods. In the idle part of this device, the motor 210 and centrifugal fan 300 are connected to an external power source through wires. The specific connection method should refer to the working principle in this invention. The electrical connections between the electrical components are completed in the order of their operation. The detailed connection methods are all technologies known in the art.

[0071] When using the dry-wet combined centrifugal evaporative condenser with antifreeze function of the present invention, the hot fluid is sent in from the top of the heat exchange tube 400 and led out from its bottom.

[0072] Subsequently, the centrifugal fan 300 is started, and the external airflow flows in through several through slots 151 of the fixed pipe 150, flows upward from the gap between the fixed pipe 150 and the circular cover 160, and carries away the heat on the heat exchange tube 400 before flowing into the centrifugal fan 300 and being discharged from it.

[0073] Next, the motor 210 of the drive mechanism 200 is started, which drives the worm 220 and the reciprocating screw 250 to rotate synchronously. When the worm 220 rotates, the meshing worm wheel 230 drives the spray pipe 240 to rotate. After the coolant is injected into the spray pipe 240 from the inlet pipe 290, it is thrown onto the wall of the heat exchange tube 400 by several nozzles 241, forming a water film on its surface and cooling the hot fluid inside the heat exchange tube 400. At the same time, the toothed plate 260 moves back and forth with the rotation of the reciprocating screw 250, and the meshing shaft tooth 272 drives the rotating shaft 271 to rotate. Then, the end tooth 273, which rotates together, meshes with the ring tooth 142, driving the rotating tube 141 to rotate 180° and then return to the original position.

[0074] During the reciprocating rotation of the rotating tube 141, the sliding bar 143 is moved along with it by the sliding groove 1410, and several scrapers 144 move along the trajectory of the heat exchange tube 400, thereby cleaning the outer wall of the heat exchange tube 400 by the scrapers 144 to prevent scale from forming on the outside of the tube wall.

[0075] The foregoing description of specific exemplary embodiments of the invention is for illustrative and explanatory purposes. These descriptions are not intended to limit the invention to the precise forms disclosed, and it will be apparent that many changes and variations can be made in accordance with the foregoing teachings. The exemplary embodiments were chosen and described in order to explain the specific principles of the invention and its practical application, thereby enabling those skilled in the art to implement and utilize various different exemplary embodiments of the invention, as well as various different choices and variations. The scope of the invention is intended to be defined by the specification and its equivalents.

Claims

1. A dry-wet combined centrifugal evaporative condenser with antifreeze function, characterized in that: It includes a condenser tube, a drive mechanism and heat exchange tubes installed inside it, and a centrifugal fan installed at the top of the condenser tube; The condenser tube includes a bottom frame, a bottom tube, a rotating part and a fixed tube arranged sequentially from bottom to top. The inner side of the fixed tube is provided with a circular cover, and the bottom of the outer wall of the fixed tube is provided with several through grooves that run through the inside and outside. After the centrifugal fan is started, the external airflow flows into the gap between the fixed tube and the circular cover through the through grooves to cool the upper half of the heat exchange tube. A connecting frame is fixedly connected between the outer wall of the fixed pipe and the bottom pipe by bolts. A partition is welded to the inner wall of the fixed pipe near the bottom end. Several regularly distributed and interconnected through slots are opened on the outer wall of the fixed pipe above the partition. The circular cover is snapped and fixed to the top surface of the partition. The rotating part includes a rotating tube, a ring tooth sleeved on the outer wall of the rotating tube, a pair of slide bars arranged symmetrically on the inner wall of the rotating tube, and several scrapers arranged on the slide bars. When the rotating tube rotates, the scrapers rotate with it and move along the trajectory of the outer wall of the heat exchange tube. The driving mechanism includes a motor, a spray pipe driven by the motor, a reciprocating screw, a toothed plate sleeved on the outside of the reciprocating screw, and a transmission part disposed on the outside of the toothed plate. After the motor starts, the spray pipe rotates and throws the coolant toward the heat exchange tube. After the reciprocating screw rotates, it drives the toothed plate to move back and forth laterally. The transmission part, in conjunction with the ring gear, drives the rotating tube to rotate. The motor is fixedly connected to the bracket on the bottom surface of the inner wall of the base frame by bolts. A worm gear is coaxially connected to the output shaft of the motor. A worm wheel meshes with the outer side of the worm gear. The worm wheel is snapped and fixed to the outer wall of the spray pipe. The spray pipe is rotatably connected to the top surface of the bottom frame. Several regularly distributed nozzles are threaded onto the outer wall of the spray pipe. The reciprocating screw is snapped and fixed to the front end of the worm gear. The toothed plate is sleeved on the outside of the reciprocating screw. The transmission unit includes a rotating shaft rotatably connected inside the bottom frame, shaft teeth snapped and fixed to the outer wall of the rotating shaft and meshing with the toothed plate, and end teeth snapped and fixed to the top of the rotating shaft and meshing with the ring teeth. The driving mechanism also includes a positioning plate that is snapped and fixed to the upper and lower ends of the bottom frame and an inlet pipe that is sleeved on the bottom end of the spray pipe. The top end of the reciprocating screw is rotatably connected to the outer wall of the positioning plate, and the toothed plate is slidably connected to the inside of the positioning plate. The centrifugal fan is fixedly connected to the top surface of the fixed pipe by bolts. The upper and lower ends of the heat exchange tube are respectively clamped and fixed to the outer wall of the fixed pipe and the outer wall of the bottom pipe. The middle part of the heat exchange tube is clamped and fixed to the inside of the partition.

2. The dry-wet combined centrifugal evaporative condenser with antifreeze function according to claim 1, characterized in that: The bottom tube is welded and fixed to the top surface of the bottom frame. A liquid guide plate for draining coolant is welded and fixed to the inner wall of the bottom tube. A drain pipe is snapped and fixed to the bottom end of the liquid guide plate.

3. The dry-wet combined centrifugal evaporative condenser with antifreeze function according to claim 2, characterized in that: The rotating tube is rotatably connected between the bottom tube and the fixed tube. Two transverse T-shaped grooves are provided on the inner wall of the rotating tube. The ring teeth are snapped and fixed on the outer wall of the rotating tube. The slide bars are slidably connected inside the grooves. The front and rear slide bars abut against the bottom and top ends of the front and rear grooves, respectively. The scraper is rotatably connected inside the slide bars. The size of the scraper is adapted to the outer wall of the heat exchange tube.

4. Application of a dry-wet combined centrifugal evaporative condenser with antifreeze function, as described in claim 3, characterized in that: Application in heat exchange equipment with antifreeze function.

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