Centrifugal water cooling unit

Abstract

The invention relates to the technical field of cooling water filtration, in particular to a centrifugal water chilling unit which comprises an evaporator, a centrifugal compressor arranged at the top of the evaporator and a condenser arranged on one side of the evaporator, the water inlet end of the centrifugal compressor is communicated with the evaporator, and the water outlet end of the centrifugal compressor is communicated with the condenser. Through the synergistic effect of the spiral magnetic field of the permanent magnet ring in the rotary magnetic tube and the centrifugal force, ferromagnetic particles are efficiently adsorbed and separated under the superposition of Lorentz force and the centrifugal force, and meanwhile, a staged self-cleaning mechanism triggered by the pressure difference in the filter cartridge is controlled through linkage control of filter plate scrubbing, magnetic tube dynamic speed regulation and reversing and directional pollution discharge; the problem of non-magnetic impurity blockage is effectively solved, the fine cleaning and turbulence impact effects of the carbon fiber bristle bundles are combined, the service life of the filter plate is prolonged, the impurity treatment efficiency and operation stability of the water chilling unit are improved, and impurities flowing into external refrigeration equipment are reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of cooling water filtration, and particularly to a centrifugal water-cooled unit. Background Art

[0002] In traditional centrifugal water-cooled units, the treatment of cooling water impurities mostly adopts a single technical means of static magnetic field separation and fixed filter screen interception. The ferromagnetic particles cannot be separated alone, resulting in the common blockage of the filter screen with non-magnetic impurities. It is necessary to frequently stop the machine for manual cleaning of the filter screen, seriously affecting the continuous operation efficiency of the equipment.

[0003] The patent number CN202421162134.9 discloses a frequency conversion centrifugal water chiller for preventing scale, including a support frame, an evaporator, a centrifugal compressor, and a condenser. A second water inlet is installed at a position near the top of the front end of the condenser, and slag discharge ports are installed at the bottoms of the first water inlet and the second water inlet.

[0004] When the above patent is implemented, the ferromagnetic particles cannot be separated alone, resulting in the common blockage of the filter screen with non-magnetic impurities. It is necessary to frequently stop the machine for manual cleaning of the filter screen, seriously affecting the continuous operation efficiency of the equipment. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to provide a centrifugal water-cooled unit to solve the problem that the ferromagnetic particles in the existing centrifugal water-cooled unit cannot be separated alone, resulting in the common blockage of the filter screen with non-magnetic impurities, and it is necessary to frequently stop the machine for manual cleaning of the filter screen, seriously affecting the continuous operation efficiency of the equipment.

[0006] Based on the above purpose, the present invention provides a centrifugal water-cooled unit, including an evaporator, a centrifugal compressor arranged on the top of the evaporator, and a condenser arranged on one side of the evaporator. The water inlet end of the centrifugal compressor is communicated with the evaporator, and the water outlet end is communicated with the condenser. It further includes: A filtering part arranged at the liquid outlet end of the evaporator, and a first guiding pipe, a rotating magnetic tube, a filter cylinder, and a second guiding pipe are sequentially arranged along the flowing direction of the cooling water; wherein, the first guiding pipe is fixedly connected with the liquid outlet end of the evaporator through a flange, both ends of the rotating magnetic tube are rotatably arranged with the first guiding pipe and the filter cylinder respectively, a filter plate with a porous structure is arranged inside the filter cylinder, the other end is fixedly connected with the second guiding pipe through a flange, and the second guiding pipe is fixedly connected with the liquid inlet end of an external refrigeration device through a flange; It further includes a driving part arranged on the evaporator for driving the rotating magnetic tube to rotate; The cooling water enters the rotating magnetic tube from the liquid outlet end of the evaporator through the first guiding pipe. A permanent magnet ring is arranged inside the rotating magnetic tube. The rotating magnetic field generated by the rotation of the permanent magnet ring enables the ferromagnetic particles to be affected by the Lorentz force and move spirally along the magnetic force lines. The particles are adsorbed on the inner wall of the magnetic field cavity under the combined action of centrifugal force and magnetic force to achieve separation. The non-magnetic impurities are intercepted by the filter plate, and the clean water flow enters the external refrigeration device. Furthermore, the permanent magnet ring includes eight groups of permanent magnets equidistantly arranged along the inner wall of the rotating magnetic tube.

[0007] Furthermore, the permanent magnets are radially deflected by an angle of 5° relative to the axis of the rotating magnetic tube. The eight groups of permanent magnets form a spiral magnetic field, and the magnetic poles of the eight groups of permanent magnets are alternately arranged.

[0008] Furthermore, a first rotary joint is also connected between the first guiding tube and the rotating magnetic tube, and a second rotary joint is also connected between the other end of the rotating magnetic tube and the filter cartridge. Among them, one end of the first rotary joint is rotatably arranged with the first guiding tube, and the other end is fixedly arranged with the rotating magnetic tube through a flange. One end of the second rotary joint is fixedly arranged with the rotating magnetic tube through a flange, and the other end is rotatably arranged with the filter cartridge.

[0009] Furthermore, a cleaning part for cleaning the filter cartridge is also arranged inside the filter cartridge.

[0010] Furthermore, the cleaning part includes a cleaning component for cleaning the filter plate and a triggering component for triggering the cleaning component to work, and also includes a sewage discharge pipe communicated with the filter cartridge. The water inlet end of the sewage discharge pipe is located on the water outlet side of the filter plate, and a solenoid valve is arranged on the sewage discharge pipe.

[0011] Furthermore, the cleaning component includes a servo motor fixed at the corner of the second guiding tube. The output end of the servo motor is connected with a driving rod. The driving rod is connected with the second guiding tube through a sealing bearing, and at least one group of brush rods for cleaning the filter plate is arranged at the other end of the driving rod.

[0012] Furthermore, carbon fiber brush bundles are arranged on the brush rods for cleaning the filter holes on the filter plate.

[0013] Furthermore, the triggering component includes a first pressure sensor and a second pressure sensor symmetrically arranged on both sides of the filter plate. The two respectively monitor the water pressure on both sides of the filter plate to monitor the degree of blockage of the filter screen. When the external control system detects that the pressure difference between the two reaches a preset value, the cleaning component is first started to clean the filter plate, then the rotation speed of the rotating magnetic tube is increased and it rotates alternately and reciprocally, and finally the solenoid valve is opened to discharge the sewage through the sewage discharge pipe.

[0014] Furthermore, the driving part includes a support rod fixed on the evaporator. The top of the support rod is fixed with a driving motor. The output end of the driving motor is connected with a transmission rod. The other end of the transmission rod is connected with a driving gear. A driven gear meshing with the driving gear is fixedly sleeved on the outer periphery of the rotating magnetic tube.

[0015] The centrifugal water-cooled unit provided by the present invention enables ferromagnetic particles to be efficiently adsorbed and separated under the superposition of the Lorentz force and the centrifugal force through the synergistic action of the spiral magnetic field of the permanent magnet ring in the rotating magnetic tube and the centrifugal force. At the same time, the staged self-cleaning mechanism triggered by the pressure difference in the filter cartridge effectively solves the problem of blockage by non-magnetic impurities through the linkage control of brushing the filter plate, dynamically adjusting the speed and reversing the direction of the magnetic tube, and directional sewage discharge. Combining the fine cleaning and turbulent impact effects of the carbon fiber brush bundles prolongs the service life of the filter plate, improves the impurity treatment efficiency and operation stability of the water-cooled unit, reduces the impurities flowing into the external refrigeration equipment, improves the operation stability and service life of the external refrigeration equipment, and at the same time reduces the maintenance requirements and energy consumption, and is suitable for long-term continuous operation under complex working conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only those of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0017] Figure 1 It is a schematic structural diagram of the first perspective of the embodiment of the present invention; Figure 2 For the embodiment of the present invention Figure 1 The enlarged structural diagram of A therein; Figure 3 It is a schematic structural diagram of the filtering part of the embodiment of the present invention; Figure 4 It is a schematic diagram of a partial internal structure of the filtering part of the embodiment of the present invention; Figure 5 It is a schematic diagram of the partial structure splitting of the filtering part of the embodiment of the present invention; Figure 6 It is a schematic structural diagram of the rotating magnetic tube of the embodiment of the present invention; Figure 7 It is a schematic structural diagram of the first perspective of the filter cartridge of the embodiment of the present invention; Figure 8 It is a schematic structural diagram of the second perspective of the filter cartridge of the embodiment of the present invention.

[0018] The labels in the figure are: 1. Evaporator; 2. Condenser; 3. Centrifugal compressor; 4. Filter section; 41. First guiding pipe; 42. First rotary joint; 43. Rotary magnetic tube; 431. Permanent magnetic ring; 4311. Permanent magnet; 432. Driven gear; 44. Second rotary joint; 45. Filter cartridge; 451. Quick-release clamp; 452. Filter plate; 453. Drain pipe; 4531. Solenoid valve; 454. First pressure sensor; 455. Second pressure sensor; 46. Second guiding pipe; 5. Cleaning section; 51. Servo motor; 52. Driving rod; 53. Brush rod; 6. Driving section; 61. Support rod; 62. Driving motor; 63. Transmission rod; 64. Driving gear. Detailed implementation manner

[0019] To make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below in conjunction with specific embodiments.

[0020] It should be noted that unless otherwise defined, the technical terms or scientific terms used in the present invention should have the ordinary meanings understood by those with ordinary skills in the field to which the present invention belongs. The "first", "second" and similar terms used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. The terms such as "including" or "comprising" mean that the elements or objects appearing before this term cover the elements or objects listed after this term and their equivalents, without excluding other elements or objects. The terms such as "connected" or "linked" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The terms such as "upper", "lower", "left", "right" are only used to represent relative positional relationships, and when the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0021] As Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 As shown in [relevant figures], a centrifugal water-cooled unit includes an evaporator 1, a centrifugal compressor 3 provided at the top of the evaporator 1, and a condenser 2 provided on one side of the evaporator 1. The water inlet end of the centrifugal compressor 3 is communicated with the evaporator 1, and the water outlet end is communicated with the condenser 2; the low-pressure liquid refrigerant in the evaporator 1 absorbs the heat of the cold water flowing through its tube bundle and vaporizes to form a low-temperature and low-pressure gaseous refrigerant. The centrifugal compressor 3 does work on the gaseous refrigerant through a high-speed rotating impeller and compresses it into a high-temperature and high-pressure gas. After the high-temperature refrigerant gas enters the condenser 2, it is condensed into a high-pressure liquid by heat dissipation through the cooling water or air outside the tube. The liquid refrigerant returns to the evaporator 1 again after being depressurized by a throttling device to complete the refrigeration cycle. It also includes: The filtering part 4 arranged at the liquid outlet end of the evaporator 1 is successively provided with a first guiding pipe 41, a rotating magnetic pipe 43, a filter cartridge 45 and a second guiding pipe 46 along the cooling water flow direction; wherein, the first guiding pipe 41 is fixedly connected to the liquid outlet end of the evaporator 1 through a flange, both ends of the rotating magnetic pipe 43 are rotatably arranged with the first guiding pipe 41 and the filter cartridge 45 respectively, a filter plate 452 with a porous structure is arranged inside the filter cartridge 45, the other end is fixedly connected to the second guiding pipe 46 through a flange, and the second guiding pipe 46 is fixedly connected to the liquid inlet end of the external refrigeration equipment through a flange; quick-release clamps 451 are arranged at both ends of the filter cartridge 45, and both ends of the filter cartridge 45 are fixedly connected to the second guiding pipe 46 and the second rotating joint 44 respectively through the quick-release clamps 451; It further includes a driving part 6 arranged on the evaporator 1 for driving the rotating magnetic pipe 43 to rotate; The cooling water enters the rotating magnetic pipe 43 from the liquid outlet end of the evaporator 1 through the first guiding pipe 41. A permanent magnetic ring 431 is arranged inside the rotating magnetic pipe 43. The rotating magnetic field generated by the rotation of the permanent magnetic ring 431 causes ferromagnetic particles to be affected by the Lorentz force and move spirally along the magnetic force lines. The particles are adsorbed on the inner wall of the magnetic field cavity under the combined action of centrifugal force and magnetic force to achieve separation. Non-magnetic impurities are intercepted by the filter plate 452, and the clean water flow enters the external refrigeration equipment.

[0022] In this embodiment, after the cooling water flows out from the liquid outlet end of the evaporator 1, it successively flows through the first guiding pipe 41 and enters the rotating magnetic pipe 43. The driving part 6 drives the rotating magnetic pipe 43 to rotate around the axis, driving the permanent magnetic ring 431 on its inner wall to rotate synchronously, generating a spirally distributed rotating magnetic field; the ferromagnetic particles move spirally along the magnetic force lines under the action of the Lorentz force, and at the same time are affected by the centrifugal force of the rotating magnetic pipe 43 and are adsorbed on the inner wall of the magnetic field cavity to achieve separation; the cooling water containing non-magnetic impurities continues to enter the filter cartridge 45, and the solid particles are intercepted by the filter plate 452 with a porous structure. The clean water flow passes through the second guiding pipe 46 and enters the external refrigeration equipment for circulation, ensuring the cleanliness of the cooling water, reducing the energy consumption and manual maintenance cost of the external equipment, reducing the impurities flowing into the external refrigeration equipment, and improving the operation stability and service life of the external refrigeration equipment.

[0023] Preferably, the permanent magnetic ring 431 includes eight groups of permanent magnets 4311 arranged equidistantly along the inner wall of the rotating magnetic pipe 43; The permanent magnets 4311 are radially deflected by an angle of 5° relative to the axis of the rotating magnetic pipe 43. The eight groups of permanent magnets 4311 form a spiral magnetic field, and the magnetic poles of the eight groups of permanent magnets 4311 are alternately arranged.

[0024] In this embodiment, after the cooling water flows out from the liquid outlet end of the evaporator 1, it enters the rotating magnetic tube 43 through the first guiding tube 41. The driving part 6 drives the rotating magnetic tube 43 to rotate around its axis, driving the permanent magnetic ring 431 on its inner wall to rotate synchronously. The permanent magnetic ring 431 is composed of eight groups of permanent magnets 4311 evenly distributed circumferentially along the inner wall of the rotating magnetic tube 43. Each permanent magnet 4311 is radially deflected by 5° relative to the axis of the rotating magnetic tube 43, forming a spiral magnetic field, and the magnetic poles of adjacent permanent magnets 4311 are alternately arranged, enhancing the spatial coverage and direction change of the magnetic field, and improving the particle separation rate. The ferromagnetic particles are affected by the Lorentz force in the spiral magnetic field and move spirally along the magnetic force lines. At the same time, affected by the centrifugal force of the rotating magnetic tube 43, they are adsorbed on the inner wall of the magnetic field cavity and accumulate in the direction of the rotation of the rotating magnetic tube 43, reducing the load on the filter plate 452. The separated cooling water continues to flow into the filter cartridge 45, and non-magnetic impurities are intercepted by the filter plate 452 with a porous structure. The clean water flows through the second guiding tube 46 and enters the external refrigeration equipment.

[0025] Preferably, a first rotary joint 42 is also connected between the first guiding tube 41 and the rotating magnetic tube 43, and a second rotary joint 44 is also connected between the other end of the rotating magnetic tube 43 and the filter cartridge 45. Among them, one end of the first rotary joint 42 is rotatably arranged with the first guiding tube 41, and the other end is fixedly arranged with the rotating magnetic tube 43 through a flange. One end of the second rotary joint 44 is fixedly arranged with the rotating magnetic tube 43 through a flange, and the other end is rotatably arranged with the filter cartridge 45.

[0026] Preferably, a cleaning part 5 for cleaning the filter cartridge 45 is also arranged in the filter cartridge 45; The cleaning part 5 includes a cleaning component for cleaning the filter plate 452 and a triggering component for triggering the cleaning component to work, and also includes a sewage discharge pipe 453 communicated with the filter cartridge 45. The water inlet end of the sewage discharge pipe 453 is located on the water outlet side of the filter plate 452, and a solenoid valve 4531 is arranged on the sewage discharge pipe 453; The cleaning component includes a servo motor 51 fixed at the corner of the second guiding tube 46, the output end of which is connected with a driving rod 52. The driving rod 52 is connected with the second guiding tube 46 through a sealed bearing, and at least one group of brush rods 53 for cleaning the filter plate 452 is arranged at the other end of the driving rod 52; Carbon fiber brush bundles are arranged on the brush rods 53 for cleaning the filter holes on the filter plate 452.

[0027] In this embodiment, the cooling water enters the rotating magnetic tube 43 from the liquid outlet end of the evaporator 1 through the first guiding tube 41. After the ferromagnetic particles are separated, the cooling water flows into the filter cartridge 45. The non-magnetic impurities are intercepted by the filter plate 452, and the clean water flows through the second guiding tube 46 into the external refrigeration equipment. When the trigger assembly detects that the pressure difference between both sides of the filter plate 452 reaches the preset threshold, the servo motor 51 is started, and the driving rod 52 drives the brush rod 53 to rotate through the sealing bearing. The carbon fiber brush bundle penetrates into the filter holes of the filter plate 452 to scrape off the blockages. Meanwhile, the solenoid valve 4531 is opened, and the sewage is discharged through the sewage discharge pipe 453 located on the water outlet side of the filter plate 452. During the cleaning process, the rotating magnetic tube 43 rotates forward and backward alternately to peel off the adsorbed particles. After the pressure difference returns to normal, the solenoid valve 4531 is closed, and the system resumes the continuous filtration state.

[0028] Preferably, the trigger assembly includes a first pressure sensor 454 and a second pressure sensor 455 symmetrically arranged on both sides of the filter plate 452. The two respectively monitor the water pressure on both sides of the filter plate 452 to monitor the degree of blockage of the filter screen. When the external control system detects that the pressure difference between the two reaches the preset value, the cleaning assembly is first started to clean the filter plate 452, then the rotation speed of the rotating magnetic tube 43 is increased and it rotates alternately back and forth, and finally the solenoid valve 4531 is opened to discharge the sewage through the sewage discharge pipe 453.

[0029] In this embodiment, when the cooling water is filtered by the filter plate 452, the first pressure sensor 454 and the second pressure sensor 455 symmetrically arranged on both sides of the filter plate 452 continuously monitor the water pressure difference between the water inlet side and the water outlet side. When the external control system detects that the pressure difference reaches the preset threshold, the cleaning assembly is first started to drive the brush rod 53 to rotate and scrub the filter plate 452 to remove the blockages in the filter holes. Subsequently, the rotation speed of the rotating magnetic tube 43 is increased and it is controlled to rotate forward and backward alternately, driving the permanent magnet ring 431 to rotate at a high speed and driving the water flow to form a tangential eddy current. When the water flow continuously rotates tangentially, the rotating magnetic tube 43 is controlled to reverse, so that its rotation direction is opposite to the water flow vortex direction, thereby generating a high-intensity turbulent impact on the inner wall of the rotating magnetic tube 43, destroying the adsorption equilibrium state of the ferromagnetic particles, and enabling the particles to break away from the cavity wall under the action of the fluid shear force to achieve peeling. Finally, the solenoid valve 4531 is opened, and the sewage is discharged from the water outlet side of the filter plate 452 through the sewage discharge pipe 453. After the pressure difference returns to the normal range, the solenoid valve 4531 is closed, and the system continues to circulate and filter.

[0030] Preferably, the driving part 6 includes a support rod 61 fixed on the evaporator 1. The top of the support rod 61 is fixed with a driving motor 62. The output end of the driving motor 62 is connected with a transmission rod 63. The other end of the transmission rod 63 is connected with a driving gear 64. A driven gear 432 meshing with the driving gear 64 is fixedly sleeved on the outer periphery of the rotating magnetic tube 43. After the driving motor 62 is started, the power is transmitted to the driving gear 64 through the transmission rod 63. The driving gear 64 meshes with the driven gear 432 fixed to the outer periphery of the rotating magnetic tube 43 to drive the rotating magnetic tube 43 to rotate at high speed around the axis. When the rotating magnetic tube 43 rotates, the permanent magnet ring 431 on its inner wall synchronously generates a spiral magnetic field. The ferromagnetic particles are adsorbed on the cavity wall under the action of the magnetic field and centrifugal force. At the same time, the driving unit 6 adjusts the speed and direction of the rotating magnetic tube 43 in real time through gear transmission to match the particle separation requirements under different flow rate conditions.

[0031] When in use, cooling water enters the rotating magnetic tube 43 from the liquid outlet of the evaporator 1 through the first guide pipe 41, and the driving motor 62 of the driving unit 6 drives the gear 64 through the transmission rod 63 to mesh with the driven gear 432 on the outer periphery of the rotating magnetic tube 43, driving the rotating magnetic tube 43 to rotate. The permanent magnetic ring 431 on its inner wall is composed of eight groups of permanent magnets 4311 with a radial deflection of 5° and alternating magnetic poles to form a spiral magnetic field, so that the ferromagnetic particles are subjected to the Lorentz force and spirally move along the magnetic lines of force and are adsorbed on the cavity wall by the centrifugal force. After the separated cooling water flows into the filter cartridge 45, the non-magnetic impurities are intercepted by the porous filter plate 452, and the clean water flows through the second guide pipe 46 and is transported to the outside refrigeration equipment; when the first pressure sensor 454 and the second pressure sensor 455 symmetrically arranged on both sides of the filter plate 452 detect that the pressure difference exceeds the preset value, the external control system triggers the cleaning process: the servo motor 51 drives the carbon fiber bristle bundle of the brush rod 53 to rotate and scrape off the blockage in the filter hole, and then drives the motor 62 to increase the speed of the rotating magnetic tube 43 and switch the forward and reverse modes, and uses the high-speed rotating permanent magnet ring 431 to collide with the reverse water flow vortex to form turbulent impact to peel off the adsorbed particles, and finally opens the solenoid valve 4531 to discharge the sewage through the drain pipe 453 on the outlet side of the filter plate 452. After the pressure difference returns to normal, the system restarts the filtration cycle.

[0032] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples. Under the concept of the present invention, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity.

[0033] The present invention is intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A centrifugal water cooling unit, comprising an evaporator (1), a centrifugal compressor (3) arranged on the top of the evaporator (1), and a condenser (2) arranged on one side of the evaporator (1), wherein the water inlet end of the centrifugal compressor (3) is connected to the evaporator (1), and the water outlet end of the centrifugal compressor (3) is connected to the condenser (2), characterized in that: Also includes: A filter section (4) is arranged at the liquid outlet of the evaporator (1), and is provided with a first guide pipe (41), a rotating magnetic tube (43), a filter cartridge (45) and a second guide pipe (46) in sequence along the flow direction of cooling water; wherein the first guide pipe (41) is fixedly connected to the liquid outlet of the evaporator (1) via a flange, and the two ends of the rotating magnetic tube (43) are rotatably arranged with the first guide pipe (41) and the filter cartridge (45) respectively; a filter plate (452) with a porous structure is arranged in the filter cartridge (45), and the other end is fixedly connected to the second guide pipe (46) via a flange, and the second guide pipe (46) is fixedly connected to the liquid inlet of an external refrigeration device via a flange; It also includes a driving unit (6) disposed on the evaporator (1) for driving the rotating magnetic tube (43) to rotate; Cooling water enters the rotating magnetic tube (43) from the liquid outlet of the evaporator (1) through the first guide tube (41). A permanent magnetic ring (431) is provided in the rotating magnetic tube (43). The rotating magnetic field generated by the rotation of the permanent magnetic ring (431) causes the ferromagnetic particles to be acted upon by the Lorentz force and to move in a spiral along the magnetic lines of force. The particles are adsorbed on the inner wall of the magnetic field cavity under the combined action of centrifugal force and magnetic force to achieve separation. Non-magnetic impurities are intercepted by the filter plate (452), and the clean water flows into the external refrigeration equipment.

2. The centrifugal water cooling unit according to claim 1, characterized in that: The permanent magnet ring (431) comprises eight groups of permanent magnets (4311) arranged at equal distances along the inner wall of the rotating magnetic tube (43).

3. The centrifugal water cooling unit according to claim 2, characterized in that: The permanent magnets (4311) are radially deflected at an angle of 5° relative to the axis of the rotating magnetic tube (43). The eight groups of permanent magnets (4311) form a spiral magnetic field, and the magnetic poles of the eight groups of permanent magnets (4311) are arranged alternately.

4. The centrifugal water cooling unit according to claim 1, characterized in that: A first rotating joint (42) is connected between the first guide tube (41) and the rotating magnetic tube (43), and a second rotating joint (44) is connected between the other end of the rotating magnetic tube (43) and the filter cartridge (45); wherein one end of the first rotating joint (42) is rotatably arranged with the first guide tube (41), and the other end is fixedly arranged with the rotating magnetic tube (43) via a flange, and one end of the second rotating joint (44) is fixedly arranged with the rotating magnetic tube (43) via a flange, and the other end is rotatably arranged with the filter cartridge (45).

5. The centrifugal water cooling unit according to claim 1, characterized in that: A cleaning portion (5) for cleaning the filter cartridge (45) is also provided in the filter cartridge (45).

6. The centrifugal water cooling unit according to claim 5, characterized in that: The cleaning part (5) comprises a cleaning component for cleaning the filter plate (452) and a trigger component for triggering the operation of the cleaning component, and also comprises a sewage pipe (453) connected to the filter cartridge (45), wherein the water inlet end of the sewage pipe (453) is located at the water outlet side of the filter plate (452), and a solenoid valve (4531) is provided on the sewage pipe (453).

7. The centrifugal water cooling unit according to claim 6, characterized in that: The cleaning assembly comprises a servo motor (51) fixed at a corner of the second guide tube (46), the output end of which is connected to a driving rod (52), the driving rod (52) is connected to the second guide tube (46) via a sealed bearing, and the other end of the driving rod (52) is provided with at least one set of brush rods (53) for cleaning the filter plate (452).

8. The centrifugal water cooling unit according to claim 7, characterized in that: The brush rod (53) is provided with a bundle of carbon fiber bristles for cleaning the filter holes on the filter plate (452).

9. The centrifugal water cooling unit according to claim 6, characterized in that: The trigger assembly comprises a first pressure sensor (454) and a second pressure sensor (455) symmetrically arranged on both sides of the filter plate (452), and the two pressure sensors respectively monitor the water pressure on both sides of the filter plate (452) to monitor the degree of filter screen blockage. When the external control system detects that the pressure difference between the two reaches a preset value, the cleaning assembly is first activated to clean the filter plate (452), and then the rotation speed of the rotating magnetic tube (43) is increased to make it rotate alternately and reciprocatingly, and finally the electromagnetic valve (4531) is opened to discharge the sewage through the sewage pipe (453).

10. The centrifugal water cooling unit according to claim 1, characterized in that: The driving part (6) comprises a support rod (61) fixed on the evaporator (1), a driving motor (62) being fixed on the top of the support rod (61), a transmission rod (63) being connected to the output end of the driving motor (62), the other end of the transmission rod (63) being connected to a driving gear (64), and a driven gear (432) meshing with the driving gear (64) being fixedly sleeved on the outer periphery of the rotating magnetic tube (43).

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