Multi-stage evaporative condenser and condensing unit thereof

Abstract

The invention discloses a multi-stage evaporative condenser and a condensing unit thereof, and belongs to the technical field of condensers, the multi-stage evaporative condenser comprises a condensing pipe, a condenser control box and a compressor are arranged on the condensing pipe, a steam circulating mechanism is arranged behind the condensing pipe, and a shunting partition plate is arranged in the end part of the condensing pipe. Through the arrangement of the upper through partition plate, the lower through partition plate and the two-way partition plate, low-temperature water flow and high-temperature steam can flow reversely, the scientific and effective heat exchange principle is followed, a low-temperature side inlet just meets low-temperature side steam, a high-temperature side outlet corresponds to a high-temperature side steam inlet, and the reasonable temperature difference and sufficient heat exchange in the whole process are guaranteed; meanwhile, due to the arrangement of the suction assembly and the suction base, tiny impurities in water flow can be deposited around the bottom through centrifugal force by means of the centrifugal impeller, then the collected high-concentration impurity water flow is automatically discharged out of the system through the negative pressure suction system below the elastic membrane ring, and formation of water scale is inhibited from the source.

Description

Technical Field

[0001] This invention relates to the field of condenser technology, and more particularly to a multi-stage evaporative condenser and its condensing unit. Background Technology

[0002] The condenser is a key component in refrigeration and heating systems, and its core function is like a "heat exchanger." Its fundamental task is to release the heat from the high-temperature, high-pressure gaseous refrigerant discharged from the compressor to the external environment.

[0003] During long-term use, the minerals or impurities dissolved in the water inside the coils of the condenser will gradually accumulate and form scale, affecting the normal operation of the condenser and requiring regular cleaning, which increases the maintenance cost of the condenser. In addition, the coils inside the condenser are affected by the temperature difference between the inside and outside, and the bends are more prone to stress deformation, affecting the service life of the coils. Therefore, a multi-stage evaporative condenser and its condensing unit are proposed. Summary of the Invention

[0004] The purpose of this invention is to solve the problems in the prior art by proposing a multi-stage evaporative condenser and its condensing unit.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions: A multi-stage evaporative condenser includes a condenser tube, a condenser control box and a compressor are mounted on the condenser tube, a steam circulation mechanism is mounted behind the condenser tube, a flow divider is mounted inside the end of the condenser tube, and multiple U-shaped heat exchange coils for heat exchange of water flow are mounted inside the condenser tube.

[0006] A condensing unit includes two transition baffle layers fixed to the front and rear outer side walls of a U-shaped heat exchange coil. Between the two transition baffle layers, from the bend of the U-shaped heat exchange coil to the pipe opening, a baffle assembly and multiple double-pass baffles are sequentially arranged. The baffle assembly consists of two upper-pass baffles and a single lower-pass baffle. The lower-pass baffle is located between the two upper-pass baffles. A pressure-reducing component is arranged on the upper-pass baffle located in the bend direction of the U-shaped heat exchange coil. A pressure-relieving baffle is arranged between the multiple double-pass baffles, and multiple pressure-relieving components are arranged on the pressure-relieving baffle. The U-shaped heat exchange coil has a downward-facing through hole in the lower pipe between the lower through baffle and the upper through baffle near the U-shaped heat exchange coil pipe opening. A suction seat is connected to the outer wall of the through hole by a sealing assembly. The suction seat is connected to a power impeller by a rotating shaft. A centrifugal impeller is fixed to the top of the rotating shaft. A suction assembly is installed inside the suction seat. The suction seat is connected to a negative pressure suction box through two right-angle pipes. A negative pressure assembly is installed inside the negative pressure suction box.

[0007] Preferably, the inner wall of the condenser tube is fixedly connected to the transition baffle layer at both ends, the transition baffle layer is composed of two heat insulation plates, and heat insulation cotton is filled between the two heat insulation plates. The U-shaped heat exchange coil is fixedly connected to the inner wall of the condenser tube through multiple double-pass baffles and baffle assemblies, and mounting bases are fixedly connected to both ends of the condenser tube.

[0008] Preferably, the pressure-reducing assembly includes a pressure-reducing arc plate slidably disposed on the top of the upper through partition, the pressure-reducing arc plate being slidably connected to a slide rod, the slide rod being fixedly connected to the side wall of the upper through partition via a right-angle plate, and a return spring being sleeved on the outer side wall of the slide rod.

[0009] Preferably, the pressure relief assembly includes a pressure relief cone, the pressure relief baffle is located between the upper and lower pipes of the U-shaped heat exchange coil, and the pressure relief baffle is fixedly connected to a pressure relief mesh plate through the pressure relief holes.

[0010] Preferably, the pressure relief mesh plate is fixedly connected to the wide end of the pressure relief cone, and a sealing rubber ball is fixedly connected to the bottom end of the pressure relief mesh plate through a reset telescopic rod. The diameter of the sealing rubber ball is larger than the inner diameter of the narrow end of the pressure relief cone.

[0011] Preferably, the sealing assembly includes a sealing frame fixed to the outer wall of the U-shaped heat exchange coil, a separation tube fixedly connected to the bottom of the sealing frame, the separation tube communicating with the U-shaped heat exchange coil, the bottom end of the separation tube being fixedly connected to the suction seat, and the suction seat being rotatably connected to the power impeller and the centrifugal impeller respectively via a rotating shaft.

[0012] Preferably, the suction assembly includes a plurality of suction telescopic rods arranged in a ring array, the suction seat has a suction chamber, the inner end face of the suction chamber is fixedly connected to an elastic membrane ring through the suction telescopic rods, and the suction chamber is interconnected with the negative pressure suction box through a right-angle tube.

[0013] Preferably, the negative pressure assembly includes a negative pressure plate slidably disposed on the inner wall of the negative pressure suction box, the inner end face of the negative pressure suction box is connected to a hydraulic telescopic rod and a hydraulic push rod through interconnected chambers, the piston rod end of the hydraulic telescopic rod is fixedly connected to an expansion bucket, the hydraulic push rod is fixedly connected to the bottom end of the negative pressure plate, and the bottom of the negative pressure suction box is connected to a drainage pipe through a drainage bucket.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. This solution, through the setting of upper baffle, lower baffle and double baffle, allows the low temperature water flow and high temperature steam to flow in opposite directions, following the scientific and effective heat exchange principle. This ensures that the low temperature side inlet meets the low temperature side steam, and the high temperature side outlet corresponds to the high temperature side steam inlet, guaranteeing a reasonable temperature difference and sufficient heat exchange throughout the process. The special baffle guides the steam flow path, so that its temperature naturally forms a gradient when flowing through the U-shaped heat exchange coil.

[0015] 2. This solution, through the setting of pressure reducing and pressure releasing components, can act as an automatic pressure regulating valve. When the steam pressure is too high, it will automatically open and divert a portion of the steam to key areas (such as bends and outlet pipes) for auxiliary heating. This not only ensures the uniformity of heating, but also buffers and protects the high pressure of the system.

[0016] 3. This solution, through the installation of the suction component and suction seat, utilizes the inherent steam flow inside the condenser to drive the power impeller, which in turn drives the centrifugal impeller to deposit tiny impurities in the water flow around the bottom using centrifugal force. Then, the negative pressure suction system below the elastic membrane ring automatically discharges the collected high-concentration impurity water flow from the system, thereby inhibiting the formation of scale from the source, significantly reducing maintenance costs and frequency, and ensuring long-term efficient operation. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of a multi-stage evaporative condenser and its condensing unit proposed in this invention. Figure 2 This is an overall assembly drawing of a multi-stage evaporative condenser and its condensing unit proposed in this invention; Figure 3 for Figure 2 Enlarged view of point A in the middle; Figure 4 This is a schematic diagram of the U-shaped heat exchange coil position in a multi-stage evaporative condenser and its condensing unit proposed in this invention; Figure 5 for Figure 4 Enlarged view of point B in the middle; Figure 6 This is a schematic diagram of the position of the double-pass baffle in a multi-stage evaporative condenser and its condensing unit proposed in this invention; Figure 7 This is a schematic diagram of the structure of a multi-stage evaporative condenser and its pressure reducing component in a condensing unit, as proposed in this invention. Figure 8 This is a schematic diagram of the sealing frame position in a multi-stage evaporative condenser and its condensing unit proposed in this invention; Figure 9 This is an assembly diagram of the suction seat in a multi-stage evaporative condenser and its condensing unit proposed in this invention. Figure 10 This is a schematic diagram of the connection between the power impeller and the centrifugal impeller in a multi-stage evaporative condenser and its condensing unit proposed in this invention. Figure 11 This is a cross-sectional view of the suction seat in a multi-stage evaporative condenser and its condensing unit proposed in this invention. Figure 12This is a schematic diagram of the structure of a multi-stage evaporative condenser and its negative pressure component in a condensing unit, as proposed in this invention.

[0018] In the diagram: 1. Condenser tube; 2. Mounting base; 3. Condenser control box; 4. Compressor; 5. U-shaped heat exchange coil; 6. Diverter baffle; 7. Transition baffle layer; 8. Upper baffle; 9. Lower baffle; 10. Double baffle; 11. Pressure reducing arc plate; 12. Return spring; 13. Pressure relief baffle; 14. Pressure relief mesh plate; 15. Pressure relief cone; 16. Return telescopic rod; 17. Sealing rubber ball; 18. Sealing frame; 19. Separator tube; 20. Suction seat; 21. Power impeller; 22. Centrifugal impeller; 23. Suction telescopic rod; 24. Elastic diaphragm ring; 25. Negative pressure suction box; 26. Expansion hopper; 27. Hydraulic telescopic rod; 28. Hydraulic push rod; 29. ​​Negative pressure plate; 30. Drainage hopper; 31. Drainage pipe. Detailed Implementation

[0019] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0020] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0021] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0022] Example, refer to Figures 1 to 12A multi-stage evaporative condenser includes a condenser tube 1, a condenser control box 3 and a compressor 4 installed on the condenser tube 1, a steam circulation mechanism installed behind the condenser tube 1, a flow divider 6 installed inside the end of the condenser tube 1, and multiple U-shaped heat exchange coils 5 for exchanging heat with water flow installed inside the condenser tube 1. The steam circulation mechanism consists of the existing circulating cooling tower, circulating water pump and circulating water pipeline of the condenser. The compressor 4, throttle valve and evaporator structure used in conjunction with the condenser are existing technologies and will not be described in detail later. A condensing unit includes two transition baffle layers 7 fixed on the front and rear outer side walls of a U-shaped heat exchange coil 5. Between the two transition baffle layers 7, from the bend of the U-shaped heat exchange coil 5 to the pipe opening, a baffle assembly and multiple double-pass baffles 10 are sequentially arranged. The baffle assembly consists of two upper-pass baffles 8 and a single lower-pass baffle 9. The lower-pass baffle 9 is located between the two upper-pass baffles 8. A pressure-reducing component is arranged on the upper-pass baffle 8 located in the bend direction of the U-shaped heat exchange coil 5. A pressure-relieving baffle 13 is arranged between the multiple double-pass baffles 10. Multiple pressure-relieving components are arranged on the pressure-relieving baffle 13. Furthermore, the inner wall of the condenser tube 1 is fixedly connected to the transition baffle layer 7 at both ends. The transition baffle layer 7 consists of two heat insulation plates, with heat insulation cotton filling between the two heat insulation plates. The U-shaped heat exchange coil 5 is fixedly connected to the inner wall of the condenser tube 1 through multiple double-pass baffles 10 and baffle assemblies. Mounting seats 2 are fixedly connected to both ends of the condenser tube 1. The pressure reducing assembly includes a pressure reducing arc plate 11 slidably disposed on the top of the upper through baffle 8. The pressure reducing arc plate 11 is slidably connected to a sliding rod, which is connected to the upper through baffle 8 through a right-angle plate. The side wall of the plate 8 is fixedly connected, and a return spring 12 is sleeved on the outer side wall of the slide rod. The pressure relief assembly includes a pressure relief cone 15, and a pressure relief baffle 13 is located between the upper and lower pipes of the U-shaped heat exchange coil 5. The pressure relief baffle 13 is fixedly connected to a pressure relief mesh plate 14 through the pressure relief hole. The pressure relief mesh plate 14 is fixedly connected to the wide end of the pressure relief cone 15. The bottom end of the pressure relief mesh plate 14 is fixedly connected to a sealing rubber ball 17 through a return telescopic rod 16. The diameter of the sealing rubber ball 17 is larger than the inner diameter of the narrow end of the pressure relief cone 15. It should be noted that: when low-temperature water flows through the top of the diversion baffle 6 and into the upper pipe of the U-shaped heat exchange coil 5, the water, after being heated by the steam refrigerant, will flow out from the lower pipe of the U-shaped heat exchange coil 5 at a higher temperature. The diversion baffle 6 separates the low-temperature and high-temperature water flows. During operation, high-pressure, high-temperature steam refrigerant will enter from above the space between the upper baffle 8 and the lower baffle 9 near the bend of the U-shaped heat exchange coil 5. The high-temperature, high-pressure refrigerant steam will then enter the condenser tube 1 and flow under high pressure from below the lower baffle 9, entering the space between another upper baffle 8 and lower baffle 9, and subsequently flowing out from the other... The refrigerant vapor flows through the top of the upper baffle 8 and enters the position of the double baffle 10. The high-temperature refrigerant vapor flows through the top of the double baffle 10 in sequence, so that the temperature of the refrigerant vapor gradually decreases. When it flows to the pipe opening of the U-shaped heat exchange coil 5, the heat carried by the refrigerant is relatively low, which preheats the low-temperature water flow passing through the pipe above the U-shaped heat exchange coil 5. This prevents the low-temperature water flow from directly contacting the high-temperature vapor outside after entering the U-shaped heat exchange coil 5, which would cause an excessive temperature difference between the inside and outside of the U-shaped heat exchange coil 5. The flow direction of the low-temperature water flow is reversed to the flow direction of the high-temperature refrigerant vapor, so as to achieve preheating and gradual heating of the low-temperature water flow. Meanwhile, when the high-temperature, high-pressure refrigerant vapor is introduced, it compresses the pressure-reducing arc plate 11 on the upper baffle 8, causing the pressure-reducing arc plate 11 to slide on the slide rod and compress the return spring 12. This causes the pressure-reducing arc plate 11 and the upper baffle 8 to misalign and open a gap, allowing some of the high-pressure refrigerant vapor to enter the transition baffle layer 7 near the bend of the U-shaped heat exchange coil 5. This allows for synchronous heat exchange between the upper and lower pipes in front of the bend of the U-shaped heat exchange coil 5, synchronizing the temperature of the upper and lower pipes in the bend area of ​​the U-shaped heat exchange coil 5 and preventing temperature differences during flow in the bend area. The transition baffle layer 7 also prevents direct heat exchange between the refrigerant vapor and the inlet and bend area of ​​the U-shaped heat exchange coil 5. To avoid heat loss at both ends of the condenser tube 1 due to high-temperature steam, and to prevent stress deformation caused by large internal and external temperature differences in the bend area, while the refrigerant vapor flows between the double-pass baffles 10, the high-pressure steam above the pressure relief baffle 13 will press the sealing rubber ball 17 in the pressure relief cone 15 of the pressure relief baffle 13 during the flow process, causing the sealing rubber ball 17 to stretch and reset the telescopic rod 16, so that the sealing rubber ball 17 separates from the narrow end of the pressure relief cone 15, thereby allowing a small part of the refrigerant vapor to enter below the pressure relief baffle 13, to assist in heat exchange and temperature control of the pipeline below the U-shaped heat exchange coil 5, and to ensure that the water flow can maintain a high water temperature even after flowing to the rear section of the U-shaped heat exchange coil 5; The advantages mentioned above are as follows: This allows for the linear transport of water through the U-shaped heat exchange coil 5, reducing the stress deformation caused by the temperature difference between the inside and outside of the pipeline. The reverse convergence of refrigerant vapor and water flow avoids the initial encounter between low-temperature water flow and high-temperature vapor, thus achieving a more scientific heat exchange method. The U-shaped heat exchange coil 5 has a downward-facing through hole in the lower pipe between the lower through baffle 9 and the upper through baffle 8 near the pipe opening of the U-shaped heat exchange coil 5. A suction seat 20 is connected to the outer wall of the through hole by a sealing assembly. The suction seat 20 is connected to a power impeller 21 by a rotating shaft. A centrifugal impeller 22 is fixed at the top of the rotating shaft. A suction assembly is installed inside the suction seat 20. The suction seat 20 is connected to a negative pressure suction box 25 by two right-angle pipes. A negative pressure assembly is installed inside the negative pressure suction box 25. Furthermore, the sealing assembly includes a sealing frame 18 fixed to the outer wall of the U-shaped heat exchange coil 5. A separation pipe 19 is fixedly connected to the bottom of the sealing frame 18. The separation pipe 19 is interconnected with the U-shaped heat exchange coil 5. The bottom end of the separation pipe 19 is fixedly connected to the suction seat 20. The suction seat 20 is rotatably connected to the power impeller 21 and the centrifugal impeller 22 respectively via a rotating shaft. The suction assembly includes a plurality of suction telescopic rods 23 arranged in a ring array. A suction chamber is opened inside the suction seat 20. The inner end face of the suction chamber is connected by suction telescopic rods. The rod 23 is fixedly connected to the elastic membrane ring 24. The suction chamber is interconnected with the negative pressure suction box 25 through the right-angle tube. The negative pressure component includes a negative pressure plate 29 that is slidably disposed on the inner wall of the negative pressure suction box 25. The inner end face of the negative pressure suction box 25 is connected to the hydraulic telescopic rod 27 and the hydraulic push rod 28 through the interconnected chambers. The piston rod end of the hydraulic telescopic rod 27 is fixedly connected to the expansion bucket 26. The hydraulic push rod 28 is fixedly connected to the bottom end of the negative pressure plate 29. The bottom of the negative pressure suction box 25 is connected to the drainage pipe 31 through the drainage bucket 30. It should be noted that when high-pressure refrigerant vapor flows through the lower baffle 9, the vapor flow blows the power impeller 21, causing it to rotate. This rotation, in turn, drives the centrifugal impeller 22 to rotate within the separation tube 19 via the shaft. During this process, the water flowing through the U-shaped heat exchange coil 5 to the separation tube 19 exhibits a concave trend. The rotation of the centrifugal impeller 22 causes the continuously flowing liquid in the separation tube 19 to rotate, causing tiny impurities in the water to accumulate on the bottom suction seat 20 under centrifugal force. This pressure exerted on the elastic diaphragm ring 24 on the suction seat 20, causing the elastic diaphragm ring 24 to deform concave at the support part of the non-suction telescopic rod 23, thus affecting the suction telescopic rod. The rod 23 generates overall downward pressure, causing the concave deformation part of the elastic membrane ring 24 to create a tiny suction channel with the suction chamber inside the suction seat 20. At the same time, the expansion bucket 26 is subjected to the flow pressure of the water flow, which pushes the hydraulic telescopic rod 27 to contract and transmits the squeezed hydraulic pressure to the hydraulic push rod 28 through the interconnected chamber. This causes the hydraulic push rod 28 to push the negative pressure plate 29 upward, making the negative pressure suction box 25 a relatively negative pressure state. This facilitates the suction chamber inside the suction seat 20 to attract the water flow containing high concentration of impurities that has centrifuged to the bottom, greatly reducing the impurities formed by scale. The impurity water flow collected in the negative pressure suction box 25 will be transported to the outside of the condenser tube 1 through the diversion bucket 30 and the diversion pipe 31. The benefits mentioned above are as follows: This can significantly reduce the impurities contained in the water flow inside the U-shaped heat exchange coil 5, thereby extending the scale formation cycle inside the U-shaped heat exchange coil 5, reducing the maintenance cost of the condenser, and ensuring that the condenser can be used efficiently for a long time. In use, the invention introduces low-temperature water flow through the top of the diversion baffle 6 into the upper pipe of the U-shaped heat exchange coil 5. The water, heated by the steam refrigerant, flows out at a higher temperature from the lower pipe of the U-shaped heat exchange coil 5, and the diversion baffle 6 separates the low-temperature and high-temperature water flows. During operation, high-pressure, high-temperature steam refrigerant is introduced from above the space between the upper baffle 8 and the lower baffle 9 near the bend of the U-shaped heat exchange coil 5. The high-temperature, high-pressure refrigerant steam enters the condenser tube 1 and then flows under high pressure from below the lower baffle 9, entering the space between another upper baffle 8 and lower baffle 9, and subsequently flows out... The refrigerant vapor flows through the top of the other upper baffle 8 and enters the position of the double baffle 10. The high-temperature refrigerant vapor flows through the top of the double baffle 10 in sequence, so that the temperature of the refrigerant vapor gradually decreases. When it flows to the pipe opening of the U-shaped heat exchange coil 5, the heat carried by the refrigerant is relatively low, which preheats the low-temperature water flow passing through the pipe above the U-shaped heat exchange coil 5. This prevents the low-temperature water flow from directly contacting the high-temperature vapor outside after entering the U-shaped heat exchange coil 5, which would cause an excessive temperature difference between the inside and outside of the U-shaped heat exchange coil 5. This allows the flow direction of the low-temperature water flow to converge against the flow direction of the high-temperature refrigerant vapor, thereby achieving preheating and gradual heating of the low-temperature water flow. Meanwhile, when the high-temperature, high-pressure refrigerant vapor is introduced, it compresses the pressure-reducing arc plate 11 on the upper baffle 8, causing the pressure-reducing arc plate 11 to slide on the slide rod and compress the return spring 12. This causes the pressure-reducing arc plate 11 and the upper baffle 8 to open a gap, allowing some of the high-pressure refrigerant vapor to enter the transition baffle layer 7 near the bend of the U-shaped heat exchange coil 5. This allows for synchronous heat exchange between the upper and lower pipes in front of the bend of the U-shaped heat exchange coil 5, ensuring that the temperature of the upper and lower pipes in the bend area of ​​the U-shaped heat exchange coil 5 is synchronized. This prevents temperature differences from occurring during the flow in the bend area. The transition baffle layer 7 also prevents direct heat exchange between the refrigerant vapor and the inlet and bend area of ​​the U-shaped heat exchange coil 5, avoiding heat loss at both ends of the condenser tube 1 and preventing stress deformation caused by large internal and external temperature differences in the bend area. Meanwhile, when the refrigerant vapor flows between the double-pass baffles 10, the high-pressure vapor above the pressure relief baffle 13 will press the sealing rubber ball 17 in the pressure relief cone 15 of the pressure relief baffle 13 during the flow process, causing the sealing rubber ball 17 to stretch and reset the telescopic rod 16, so that the sealing rubber ball 17 separates from the narrow end of the pressure relief cone 15, and then a small part of the refrigerant vapor enters below the pressure relief baffle 13 to perform auxiliary heat exchange and temperature control on the pipeline below the U-shaped heat exchange coil 5, ensuring that the water flow can maintain a high water temperature after flowing to the rear section of the U-shaped heat exchange coil 5. In this way, the U-shaped heat exchange coil 5 can be used to transport the water in a straight line, reducing the stress deformation caused by the temperature difference inside and outside the pipeline. The refrigerant vapor and water flow are transported in opposite directions, avoiding the initial encounter between low temperature water flow and high temperature vapor, and realizing a more scientific heat exchange method. When high-pressure refrigerant vapor flows through the lower baffle 9, the vapor flow blows the power impeller 21, causing it to rotate. This rotation, in turn, drives the centrifugal impeller 22 to rotate within the separation tube 19 via the shaft. During this process, the water flowing through the U-shaped heat exchange coil 5 to the separation tube 19 exhibits a concave trend. The rotation of the centrifugal impeller 22 causes the continuously flowing liquid in the separation tube 19 to rotate, causing tiny impurities in the water to accumulate on the bottom suction seat 20 under centrifugal force. This pressure exerts pressure on the elastic diaphragm ring 24 on the suction seat 20, causing the elastic diaphragm ring 24 to deform in the non-suction telescopic rod 23 support area. This deformation also creates an overall downward pressure on the suction telescopic rod 23, causing the deformed part of the elastic diaphragm ring 24 to interact with the suction chamber inside the suction seat 20. The tiny suction channel, along with the flow pressure of the water in the expansion bucket 26, pushes the hydraulic telescopic rod 27 to contract. The hydraulic pressure is then transmitted to the hydraulic push rod 28 through the interconnected chamber, causing the hydraulic push rod 28 to push the negative pressure plate 29 upward. This creates a relative negative pressure state inside the negative pressure suction box 25, facilitating the suction chamber in the suction seat 20 to attract the water flow containing high concentrations of impurities that has centrifuged to the bottom. This significantly reduces the impurities that form scale. The impurity water flow collected in the negative pressure suction box 25 is then transported to the outside of the condenser tube 1 through the diversion bucket 30 and diversion pipe 31. This significantly reduces the impurities in the water flow inside the U-shaped heat exchange coil 5, thereby extending the scale formation cycle inside the U-shaped heat exchange coil 5, reducing the maintenance cost of the condenser, and ensuring that the condenser can be used efficiently for a long time.

[0023] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A multi-stage evaporative condenser, comprising condenser tubes (1), characterized in that, The condenser tube (1) is equipped with a condenser control box (3) and a compressor (4). A steam circulation mechanism is provided behind the condenser tube (1). A flow divider (6) is provided inside the end of the condenser tube (1). Multiple U-shaped heat exchange coils (5) for exchanging heat with water flow are provided inside the condenser tube (1).

2. A condensing unit applied to a multi-stage evaporative condenser as described in claim 1, comprising two transition baffle layers (7) fixed to the front and rear outer walls of a U-shaped heat exchange coil (5), characterized in that, Between the two transition baffle layers (7), a baffle assembly and multiple double-pass baffles (10) are sequentially arranged from the bend of the U-shaped heat exchange coil (5) to the pipe opening. The baffle assembly consists of two upper-pass baffles (8) and a single lower-pass baffle (9). The lower-pass baffle (9) is located between the two upper-pass baffles (8). A pressure-reducing component is arranged on the upper-pass baffle (8) located in the bend direction of the U-shaped heat exchange coil (5). A pressure-relief baffle (13) is arranged between the multiple double-pass baffles (10). Multiple pressure-relief components are arranged on the pressure-relief baffle (13). The U-shaped heat exchange coil (5) has a downward-facing through hole on the lower pipe between the lower through partition (9) and the upper through partition (8) near the pipe opening of the U-shaped heat exchange coil (5). A suction seat (20) is connected to the outer wall of the through hole by a sealing assembly. The suction seat (20) is connected to a power impeller (21) by a rotating shaft. A centrifugal impeller (22) is fixed at the top of the rotating shaft. A suction assembly is provided inside the suction seat (20). The suction seat (20) is connected to a negative pressure suction box (25) by two right-angle pipes. A negative pressure assembly is provided inside the negative pressure suction box (25).

3. The condensing unit according to claim 2, characterized in that, The inner wall of the condenser tube (1) is fixedly connected to the transition baffle layer (7) at both ends. The transition baffle layer (7) is composed of two heat insulation plates. The space between the two heat insulation plates is filled with heat insulation cotton. The U-shaped heat exchange coil (5) is fixedly connected to the inner wall of the condenser tube (1) through multiple double-pass baffles (10) and baffle assembly. The two ends of the condenser tube (1) are fixedly connected to mounting bases (2).

4. The condensing unit according to claim 2, characterized in that, The pressure relief assembly includes a pressure relief arc plate (11) slidably disposed on the top of the upper through partition (8). The pressure relief arc plate (11) is slidably connected to a slide rod. The slide rod is fixedly connected to the side wall of the upper through partition (8) through a right-angle plate. A return spring (12) is sleeved on the outer side wall of the slide rod.

5. The condensing unit according to claim 2, characterized in that, The pressure relief assembly includes a pressure relief cone (15), and the pressure relief baffle (13) is located between the upper and lower pipes of the U-shaped heat exchange coil (5). The pressure relief baffle (13) is fixedly connected to a pressure relief mesh plate (14) through the pressure relief hole.

6. The condensing unit according to claim 5, characterized in that, The pressure relief mesh plate (14) is fixedly connected to the wide end of the pressure relief cone (15). The bottom end of the pressure relief mesh plate (14) is fixedly connected to a sealing rubber ball (17) via a reset telescopic rod (16). The diameter of the sealing rubber ball (17) is larger than the inner diameter of the narrow end of the pressure relief cone (15).

7. The condensing unit according to claim 2, characterized in that, The sealing assembly includes a sealing frame (18) fixed on the outer wall of the U-shaped heat exchange coil (5). A separation tube (19) is fixedly connected to the bottom of the sealing frame (18). The separation tube (19) is connected to the U-shaped heat exchange coil (5). The bottom end of the separation tube (19) is fixedly connected to the suction seat (20). The suction seat (20) is rotatably connected to the power impeller (21) and the centrifugal impeller (22) respectively through a rotating shaft.

8. The condensing unit according to claim 2, characterized in that, The suction assembly includes multiple suction telescopic rods (23) arranged in a ring array. The suction seat (20) has a suction chamber. An elastic membrane ring (24) is fixedly connected to the inner end face of the suction chamber through the suction telescopic rods (23). The suction chamber is interconnected with the negative pressure suction box (25) through a right-angle tube.

9. The condensing unit according to claim 2, characterized in that, The negative pressure assembly includes a negative pressure plate (29) that is slidably disposed on the inner wall of the negative pressure suction box (25). The inner end face of the negative pressure suction box (25) is connected to a hydraulic telescopic rod (27) and a hydraulic push rod (28) through an interconnected chamber. An expansion bucket (26) is fixedly connected to the piston rod end of the hydraulic telescopic rod (27). The hydraulic push rod (28) is fixedly connected to the bottom end of the negative pressure plate (29). A drainage pipe (31) is connected to the bottom of the negative pressure suction box (25) through a drainage bucket (30).

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