CN110792609A - Magnetic suspension water pump for evaporation device - Google Patents

Abstract

The invention discloses a magnetic suspension water pump for an evaporation device, which comprises a shell, wherein an upper cavity and a lower cavity which are mutually independent are arranged in the shell, a magnetic field unit is arranged in the upper cavity, an impeller device is arranged in the lower cavity, a gap is formed between the impeller device and the inner wall of the lower cavity, a water outlet pipe is arranged on one side of the shell and is communicated with the lower cavity for generating a magnetic field by the magnetic field unit so that the impeller device rotates, water is introduced into the lower cavity by the impeller device and flows out of the water outlet pipe, the abrasion resistance and durability are improved by setting a wheel shaft and a fixed shaft as ceramic materials, the shell is made of plastic materials, the magnetic field is not shielded under the waterproof condition, the water-water dual-use effect is realized, the gap is formed between the impeller device and the lower cavity, the friction is greatly reduced, the power and the power loss.

Description

Magnetic suspension water pump for evaporation device

Technical Field

The invention relates to a water pump, in particular to a magnetic suspension water pump for an evaporation device.

Background

With the development of economy and the improvement of the living standard of people, the requirements of people on life quality and health are higher and higher, in a dry environment, the resistance of a respiratory system of people is reduced, and dry air enables epidermal cells of a human body to be dehydrated and sebaceous gland secretion to be reduced, so that the skin is dry, wrinkled and even cracked, and the humidifier is arranged to relieve and eliminate air drying. The existing humidifier generates larger noise, has large power and high energy consumption in the humidification process.

Disclosure of Invention

One of the objectives of the present invention is to solve the above-mentioned deficiencies, and to provide a magnetic suspension water pump for an evaporation device, so as to solve the problems of high power, high energy consumption, high noise, etc. of the existing humidifier.

In order to solve the technical problems, the invention adopts the following technical scheme:

the invention provides a magnetic suspension water pump for an evaporation device, which comprises a shell, wherein an upper cavity and a lower cavity which are mutually independent are arranged in the shell, a magnetic field unit is arranged in the upper cavity, an impeller device is arranged in the lower cavity, a gap is formed between the impeller device and the inner wall of the lower cavity, a water outlet pipe is arranged on one side of the shell and communicated with the lower cavity, and the water outlet pipe is used for generating a magnetic field by the magnetic field unit to enable the impeller device to rotate, so that water is introduced into the lower cavity by the impeller device and flows out of the water outlet pipe.

Preferably, the further technical scheme is as follows: the magnetic field unit comprises a motor stator, and the two ends of the motor stator are sleeved on the outer wall of the lower cavity.

The further technical scheme is as follows: the motor stator is of a U-shaped structure, connecting seats are sleeved on two sides of the motor stator, and windings are arranged on the outer sides of the connecting seats and used for being connected with a power supply.

The further technical scheme is as follows: the impeller device comprises an axle and an impeller arranged at the bottom of the axle, the axle and the impeller are of a through structure, a magnetic ring is sleeved on the outer side of the axle and corresponds to the motor stator, and a ceramic ring is embedded in the inner side of the axle.

The further technical scheme is as follows: the inner wall of the lower cavity is a stepped cylindrical groove, a fixed shaft is arranged in the lower cavity, the wheel shaft is movably sleeved on the fixed shaft, the ceramic ring is arranged between the wheel shaft and the fixed shaft, and a gap is formed between the magnetic ring and the inner wall of the lower cavity.

The further technical scheme is as follows: the upper cavity body top is equipped with the sealing layer, cavity bottom is equipped with the fixed plate down, be equipped with the inlet opening on the fixed plate.

The further technical scheme is as follows: the bottom of the fixed plate is provided with annular comb-shaped teeth, the annular comb-shaped teeth are positioned on the outer side of the water inlet hole, annular turbulence grooves are further formed in the outer sides of the annular comb-shaped teeth, drainage grooves are formed in the outer sides of the annular turbulence grooves, one ends of the drainage grooves are communicated with the annular turbulence grooves, and openings are formed in the other ends of the drainage grooves and the side edge of the fixed plate.

The further technical scheme is as follows: the drainage grooves are four, the adjacent drainage grooves are perpendicular to each other, and the four drainage grooves form a cross shape.

The further technical scheme is as follows: the impeller bottom is equipped with the boss, be equipped with the locating part on the boss.

The further technical scheme is as follows: the fixed shaft is made of ceramic materials.

Compared with the prior art, the invention has the following beneficial effects: the magnetic field unit is arranged in the upper cavity, the impeller device is arranged in the lower cavity, the magnetic ring is fixedly sleeved outside the wheel shaft, the magnetic field unit is electrified, a motor stator arranged in the magnetic field unit generates a magnetic field, the magnetic ring arranged in the lower cavity rotates under the action of the magnetic field and drives the impeller device to rotate, and the impeller device rotates to introduce water in the water tank into the lower cavity and flow out of the water outlet pipe; the wheel shaft and the fixed shaft are both made of ceramic materials, so that the wear resistance and the durability are improved, the shell is made of plastic materials, a magnetic field is not shielded under the waterproof condition, a sealing layer and an upper cavity body form a closed structure, the amphibious water-saving evaporator can be used on land and water, a gap is formed between the impeller device and the outer wall of the lower cavity body, friction is greatly reduced, power and power loss are further reduced, high-efficiency silence is achieved, heat dissipation is not needed, and meanwhile the magnetic suspension water pump for the evaporation device is simple to operate and easy to popularize.

Drawings

Fig. 1 is a schematic perspective view illustrating a magnetic suspension water pump for an evaporation device according to an embodiment of the present invention.

Fig. 2 is a schematic structural diagram illustrating a top view of a magnetic suspension water pump according to another embodiment of the present invention.

Fig. 3 is a schematic structural diagram illustrating a longitudinal section of a magnetic suspension water pump according to another embodiment of the present invention.

Fig. 4 is a perspective view illustrating an impeller device according to still another embodiment of the present invention.

In the figure, 1 is a shell, 2 is an upper cavity, 3 is a lower cavity, 4 is a magnetic field unit, 5 is an impeller device, 6 is a water outlet pipe, 7 is a motor stator, 8 is a wheel shaft, 9 is an impeller, 10 is a magnetic ring, 11 is a ceramic ring, 12 is a fixed shaft, 13 is a fixed plate, 14 is a water inlet hole, 15 is a limiting piece, 16 is a sealing layer, 17 is an annular comb-shaped tooth, 18 is an annular turbulent flow groove, and 19 is a drainage groove.

Detailed Description

The invention is further elucidated with reference to the drawing.

Referring to fig. 1, 3 and 4, an embodiment of the present invention is a magnetic suspension water pump for an evaporation device, including a housing 1, where the housing 1 is made of plastic, an upper cavity 2 and a lower cavity 3 are disposed in the housing 1, the upper cavity 2 is disposed with a magnetic field unit 4, the magnetic field unit 4 is sleeved on an outer wall of the lower cavity, an impeller device 5 is disposed in the lower cavity 3, the impeller device 5 is made of polyoxymethylene material, the impeller device 5 is movably mounted in the lower cavity 3, the impeller device 5 is driven to rotate by a magnetic field generated by the magnetic field unit 4, a gap is formed between the impeller device 5 and the lower cavity 3, so that friction between the impeller device 5 and an inner wall of the lower cavity 3 is reduced during rotation, and a water outlet pipe 6 is fixedly mounted on an outer side of the housing 1, the water inlet of the water outlet pipe 6 is communicated with the lower cavity 3, and the water outlet of the water outlet pipe 6 is arranged outside the lower cavity 3, so that the water in the water tank is introduced into the lower cavity 3 by the impeller device 5, flows through the water outlet pipe 6 and flows out from the water outlet arranged outside the lower cavity 3.

Through setting up shaft 8 and fixed axle 12 to ceramic material, improve wearability and durability, and casing 1 is the plastics material, under the circumstances of water proof, also does not shield magnetic field to will form the enclosed construction by sealing layer 16 and upper chamber 2, can amphibious, and have the clearance between impeller device 5 and the lower chamber 3 outer wall, the friction that significantly reduces, and then reduce power and power loss, and need not the heat dissipation.

Referring to fig. 3, in another embodiment of the present invention, the magnetic field unit 4 includes a motor stator 7, the motor stator 7 is U-shaped, connecting seats are sleeved on two sides of the motor stator 7, the connecting seats are hollow, the longitudinal section of the connecting seats is i-shaped, two ends of the motor stator 7 are wrapped on two sides of the outside of the lower cavity 3, the two connecting seats are symmetrical with the central axis of the lower cavity 3, a winding is disposed on the outside of the connecting seats, the winding is used for connecting a power supply, a power line is disposed in the upper cavity 2, the power line is communicated with the winding and extends from the outside of the upper cavity 2, a sealing structure is formed between the power line and the upper cavity 2, when a current flows through the winding to cause the motor stator 7 to generate a magnetic field opposite to the magnetic field direction of the magnetic ring 10, the magnetic ring 10 disposed in the lower cavity 3 rotates under the action of the magnetic field, simultaneously, the impeller device 5 is driven to rotate.

Referring to fig. 3 and 4, in another embodiment of the present invention, the impeller device 5 includes an axle 8 and an impeller 9 installed at the bottom of the axle 8, the impeller 9 is fixedly installed at the bottom of the axle 8, a central axis of the impeller 9 is consistent with a central axis of the axle 8, the axle 8 and the impeller 9 are both of a through structure, a magnetic ring 10 is disposed outside the axle 8, the magnetic ring 10 includes a first magnet and a second magnet, the first magnet and the second magnet are two semi-annular magnets with opposite magnetic poles, the first magnet and the second magnet correspond to each other, opposite poles of the first magnet and the second magnet attract each other to form a closed ring, the magnetic ring 10 corresponds to the motor stator 7, the magnetic ring 10 is a permanent magnet, a hall sensor is installed in the upper cavity 2, and a magnetic field generated by the hall sensor and the magnetic ring 10 is perpendicular to each other, when the magnetic field unit 4 is connected with a power supply, current flows through a winding to enable the motor stator 7 to generate a magnetic field, the magnetic pole direction of the current magnetic ring 10 is induced by the Hall sensor, when the magnetic pole direction of the magnetic ring 10 is the same as that of the magnetic field unit 4, the magnetic ring 10 is in a static state, the impeller device 5 cannot rotate, the motor stator 7 can generate a magnetic pole magnetic field opposite to the magnetic pole direction of the magnetic ring 10 by adjusting the positive and negative poles of the current connected by the winding, the magnetic ring 10 rotates under the action of the magnetic field generated by the motor stator 7, the impeller device 5 is driven to rotate by the magnetic ring 10, a ceramic ring 11 is fixedly embedded in the inner wall of the wheel shaft 8, the inner diameter of the ceramic ring 11 is consistent with the inner diameter of the wheel shaft 8, the outer diameter of the ceramic ring 11 is smaller than the outer diameter of the wheel shaft 8, the height of the ceramic ring 11 is smaller than the, the ceramic ring 11 is made of a ceramic material, so that the wear resistance of the impeller device 5 is improved.

Referring to fig. 3 and 4, in another embodiment of the present invention, in order to reduce friction, reduce power loss, improve stability and improve work efficiency, the lower cavity 3 is a stepped cylindrical groove, the lower cavity 3 includes a first groove, a second groove and a third groove, the central axes of the first groove, the second groove and the third groove are all the same, a fixed shaft 12 is disposed in the lower cavity 3, the fixed shaft 12 is made of ceramic, the fixed shaft 12 is mounted on the central axis of the lower cavity 3 and is fixedly mounted in the first groove, the fixed shaft 12 extends from the first groove to the bottom of the second groove, the sum of the groove depth of the first groove and the groove depth of the second groove is the same as the length of the fixed shaft 12, the axle 8 is movably sleeved on the fixed shaft 12, and a ceramic ring 11 is fixedly embedded in the inner wall of the axle 8, the inner diameter of the ceramic ring 11 is consistent with the inner diameter of the wheel shaft 8, the ceramic ring 11 and the fixed shaft 12 are made of ceramic materials and are in contact with each other, so that the stability of the impeller device 5 in the rotating process is improved, the wear resistance between the impeller device 5 and the fixed shaft 12 is improved, since tap water contains micro hard particles such as mineral substances, the fixed shaft 12 is made of the ceramic materials, and the ceramic ring 11 is also made of the ceramic materials, so that the impeller 9 greatly avoids the friction loss of the micro particles in the water to the impeller 9 and the fixed shaft 12 in the rotating process, the service life of the magnetic suspension water pump is prolonged, the wheel shaft 8 is arranged in the second groove and is arranged at intervals with the second groove, the magnetic ring 10 is fixedly sleeved at the upper end of the wheel shaft 8, a gap is formed between the magnetic ring 10 and the second groove and corresponds to the motor stator 7 sleeved on the outer wall of the lower cavity 3, reduce the shaft 8 in rotatory in-process and the aforesaid friction between the cavity 3 down, arrange impeller 9 in the third recess simultaneously to and have the clearance between the third recess for avoid impeller 9 to rotate in-process and cavity 3 contact down, greatly reduced impeller 9 is at the resistance that the in-process produced because of the friction of rotation, reduce power loss, improve impeller 9 pivoted stability.

The windings arranged on two sides of the motor stator 7 are connected with a power supply, a magnetic field is generated around the motor stator 7, the magnetic ring 10 arranged in the lower cavity 3 rotates under the action of the magnetic field, meanwhile, the magnetic ring 10 drives the impeller device 5 to rotate, the impeller device 5 is made to rotate to introduce water in the water tank into the lower cavity 3, the water flows through the water outlet pipe 6 and flows out of the water outlet, the water can be automatically supplemented by a humidifier, the humidification is continuous, the power is low, the heat dissipation is not needed, the swing amplitude of the impeller 9 in the rotating process is reduced, the noise is greatly reduced, and the rotating stability of the impeller 9 is improved.

Referring to fig. 1, 2, 3 and 4, in another embodiment of the present invention, a sealing layer 16 is disposed on the top of the upper cavity 2, the sealing layer 16 is matched with the upper cavity 2, the sealing layer 16 may be an epoxy resin sealant or a polyurethane material, a sealing structure is formed on the upper cavity 2 by sealing the sealing layer 16 on the surface of the upper cavity 2, when the magnetic field unit 4 and the power line disposed in the upper cavity 2 are installed, a resin colloid is poured on the surface of the upper cavity 2 to seal the upper cavity 2, so as to form a completely sealed cavity, and the magnetic field unit 4 disposed in the upper cavity 2 can also be fixed, so that when the magnetic suspension water pump works underwater, water enters the upper cavity 2 to affect the normal operation of the magnetic suspension water pump, thereby ensuring the stable operation of the magnetic suspension water pump under water, and a fixing plate 13 is disposed at the bottom of the lower cavity 3, the fixing plate 13 can be fixed at the bottom of the lower cavity 3 by means of thread installation or sealing and bonding, a water inlet 14 is arranged on the fixing plate 13, the midpoint of the water inlet 14 is positioned on the extension line of the central axis of the lower cavity 3, the diameter of the water inlet 14 is larger than that of the boss and smaller than that of the wheel axle 8, the upper cavity 2 is sealed, and the amphibious vehicle can be used on land and water.

Referring to fig. 1 and 3, in another embodiment of the present invention, in order to further improve the stability of the magnetic suspension water pump during use and prolong the service life of the magnetic suspension water pump, annular comb-shaped teeth 17 are provided at the bottom of the fixing plate 13, the annular comb-shaped teeth 17 are spaced outside the water inlet hole 14 for isolating the influence of flocs in water on the impeller device 5 and preventing the flocs in water from entering the lower cavity 3 and wrapping around the impeller 9, so as to improve the stability of the operation of the magnetic suspension water pump, an annular turbulence groove 18 is provided outside the annular comb-shaped teeth 17, the center of the annular turbulence groove 18 is aligned with the center of the annular comb-shaped teeth 17, and a drainage groove 19 is provided outside the annular turbulence groove 18, the number of the drainage grooves 19 can be any value greater than four, the number of the drainage grooves 19 can be set according to practical situation, one end of the drainage groove 19 is communicated with the annular turbulence groove 18, and the other end of the drainage groove 19 and the side edge of the fixed plate 13 form an opening for forming a ring-shaped flow in the annular turbulent flow groove 18 when water flows through the drainage groove 19, and the adsorption of the annular comb-shaped teeth 17 arranged on the inner side of the annular turbulent flow groove 18 to floccules in the water flow is improved, so that the floccules in the water enter the lower cavity 3 to wind the impeller 9 in the process of underwater operation of the magnetic suspension water pump, the operation stability of the magnetic suspension water pump is improved, and the service life is prolonged.

Referring to fig. 3 and 4, in another embodiment of the present invention, a boss is disposed at the bottom of the impeller 9, a limiting member 15 is disposed on the boss, the limiting member 15 is perpendicular to the impeller 9, and the limiting member 15 is disposed in the water inlet 14 and has a gap with the water inlet 14, so as to prevent the impeller 9 from contacting the fixing plate 13 during the rotation process, when the impeller 9 rotates, the protrusion disposed at the bottom of the impeller 9 contacts the fixing plate 13, and the impeller 9 is spaced from the fixing plate 13, so that the contact area is greatly reduced, the resistance generated by friction during the rotation process of the impeller 9 is greatly reduced, and mineral impurities in water do not affect the impeller 9 and the shaft.

In practical use, the magnetic suspension water pump is placed under water in a double-layer water tank, the shell 1 is provided with the upper cavity 2 and the lower cavity 3 which are independent from each other, the shell 1 is made of plastic material which does not block a magnetic field, the surface of the upper cavity 2 is provided with the sealing layer 16 which forms a completely sealed structure with the upper cavity 2, meanwhile, the upper cavity 2 is internally provided with the hall sensor, the hall sensor is perpendicular to a magnetic pole magnetic field generated by the magnetic ring 10, the hall sensor senses the magnetic pole magnetic field direction of the magnetic ring 10 arranged in the lower cavity 3, the windings arranged at two sides of the motor stator 7 are connected with a power supply, the motor stator 7 generates a magnetic pole magnetic field with the direction opposite to the magnetic pole magnetic field direction sensed by the hall sensor, and the magnetic suspension water pump works normally and stably under water, when the winding is connected with a power supply, current flows through the winding to enable the motor stator 7 to generate a magnetic field, the magnetic pole direction of the current magnetic ring 10 is induced by the Hall sensor, when the magnetic pole direction of the magnetic ring 10 is the same as that of the magnetic field unit 4, the magnetic ring 10 is in a static state, the impeller device 5 cannot rotate, the motor stator 7 can generate a magnetic pole magnetic field opposite to the magnetic pole direction of the magnetic ring 10 by adjusting the positive pole and the negative pole of the current connected with the winding, the magnetic ring 10 rotates under the action of the magnetic field generated by the motor stator 7, the impeller device 5 is driven to rotate by the magnetic ring 10, a gap is formed between the magnetic ring 10 and the inner wall of the lower cavity 3, the impeller device 5 is prevented from rubbing against the inner wall of the lower cavity 3 in the rotating process, the power loss is reduced, the working efficiency is improved, and meanwhile, the ceramic ring 11 embedded in the inner, the abrasion resistance between the impeller device 5 and the fixed shaft 12 is greatly increased in the rotating process of the impeller device 5, and the durability of the magnetic suspension water pump is greatly improved.

The impeller device 5 is fixed in the lower cavity 1 through the fixing plate 13, the fixing plate 13 is provided with a water inlet 14, so that the lower cavity 3 is exposed in water, the motor stator 7 and the magnetic ring 10 are separated by the shell 1 made of plastic materials, water can be separated under the condition of not shielding a magnetic field, the water inlet of the water outlet pipe 6 is communicated with the lower cavity 3, the bottom of the fixing plate 13 is provided with annular comb-shaped teeth 17 and is arranged at intervals with the water inlet 14, the outer side of the annular comb-shaped teeth 17 is provided with an annular turbulence groove 18, the outer side of the annular turbulence groove 18 is provided with four drainage grooves 19, the adjacent drainage grooves 19 are mutually vertical, the four drainage grooves 19 form a cross shape, when the impeller device 5 rotates, water flows through the drainage grooves 19, the annular turbulence is formed in the annular turbulence groove 18 and flows through the annular comb-shaped teeth 17, the adsorption of floccules in the water flow by the annular comb-shaped teeth 17 arranged on the inner side of the annular turbulence groove 18 is improved, avoid this magnetic suspension water pump at the in-process of operation under water, cavity 3 winding impeller 9 under the aquatic flocculus gets into, improve the stability of this magnetic suspension water pump operation, and service life is prolonged, and cavity 3 is down introduced through inlet opening 14 to the flow, flow in through the water inlet, outlet pipe 6 flows through, and flow out from the delivery port that sets up in the cavity 3 outside down, through setting up fixed axle 12 to ceramic material, ceramic ring 11 is ceramic material simultaneously, make impeller 9 greatly avoided the friction loss of the small particulate matter in aquatic to impeller 9 and fixed axle 12 at the pivoted in-process, promote the life of this magnetic suspension water pump, the theory of operation through adopting brushless motor greatly increased life, low power, it is more energy-conserving, this magnetic suspension water pump adopts the water-electricity separation simultaneously, amphibian also.

Reference throughout this specification to "one embodiment," "another embodiment," "an embodiment," or the like, means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment described generally in this application. The appearances of the same phrase in various places in the specification are not necessarily all referring to the same embodiment. Further, when a particular feature, structure, or characteristic is described in connection with any embodiment, it is submitted that it is within the scope of the invention to effect such feature, structure, or characteristic in connection with other embodiments.

Although the invention has been described herein with reference to a number of illustrative embodiments thereof, it should be understood that numerous other modifications and embodiments can be devised by those skilled in the art that will fall within the spirit and scope of the principles of this disclosure. More specifically, various variations and modifications are possible in the component parts and/or arrangements of the subject combination arrangement within the scope of the disclosure, the drawings and the appended claims. In addition to variations and modifications in the component parts and/or arrangements, other uses will also be apparent to those skilled in the art.

Claims (10)

1. A magnetic suspension water pump for evaporation devices, comprising a housing (1), characterized in that: be equipped with cavity (2) and lower cavity (3) on mutually independent in casing (1), be equipped with magnetic field unit (4) in last cavity (2), be equipped with impeller device (5) down in cavity (3), impeller device (5) with the clearance has down between cavity (3) the inner wall, casing (1) one side is equipped with outlet pipe (6), outlet pipe (6) with cavity (3) are linked together down for produce the magnetic field by magnetic field unit (4), make impeller device (5) rotatory, and then introduce cavity (3) down by impeller device (5), and flow from outlet pipe (6).

2. The magnetic levitation water pump for an evaporation device as recited in claim 1, wherein: the magnetic field unit (4) comprises a motor stator (7), and the two ends of the motor stator (7) are sleeved on the outer wall of the lower cavity (3).

3. The magnetic levitation water pump for an evaporation device as recited in claim 2, wherein: the motor stator (7) is of a U-shaped structure, connecting seats are sleeved on two sides of the motor stator (7), and windings are arranged on the outer sides of the connecting seats and used for being connected into a power supply.

4. A magnetic levitation water pump for an evaporation device as claimed in claim 2 or 3, wherein: the impeller device (5) comprises an axle (8) and an impeller (9) arranged at the bottom of the axle (8), the axle (8) and the impeller (9) are both of a through structure, a magnetic ring (10) is sleeved on the outer side of the axle (8), the magnetic ring (10) corresponds to the motor stator (7), and a ceramic ring (11) is embedded in the inner side of the axle (8).

5. The magnetic levitation water pump for an evaporation device as recited in claim 4, wherein: the inner wall of the lower cavity (3) is a stepped cylindrical groove, a fixed shaft (12) is arranged in the lower cavity (3), the wheel shaft (8) is movably sleeved on the fixed shaft (12), the ceramic ring (11) is arranged between the wheel shaft (8) and the fixed shaft (12), and a gap is formed between the magnetic ring (10) and the inner wall of the lower cavity (3).

6. The magnetic levitation water pump for an evaporation device as recited in claim 1, wherein: go up cavity (2) top and be equipped with sealing layer (16), cavity (3) bottom is equipped with fixed plate (13) down, be equipped with inlet opening (14) on fixed plate (13).

7. The magnetic levitation water pump for an evaporation device as recited in claim 6, wherein: the bottom of the fixing plate (13) is provided with annular comb teeth (17), the annular comb teeth (17) are located on the outer side of the water inlet hole (14), annular turbulence grooves (18) are further formed in the outer side of the annular comb teeth (17), drainage grooves (19) are formed in the outer side of the annular turbulence grooves (18), one ends of the drainage grooves (19) are communicated with the annular turbulence grooves (18), and openings are formed in the other ends of the drainage grooves (19) and the side edge of the fixing plate (13).

8. The magnetic levitation water pump for an evaporation device as recited in claim 7, wherein: the number of the drainage grooves (19) is four, the adjacent drainage grooves (19) are perpendicular to each other, and the four drainage grooves (19) form a cross shape.

9. The magnetic levitation water pump for an evaporation device as recited in claim 4, wherein: the impeller (9) bottom is equipped with the boss, be equipped with locating part (15) on the boss.

10. The magnetic levitation water pump for an evaporation device as recited in claim 5, wherein: the fixed shaft (12) is made of ceramic materials.

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