CN215830740U - Isolated water pump - Google Patents

Abstract

The utility model relates to a water pump, and particularly discloses an isolated water pump, which comprises an impeller and a driving device, wherein the driving device comprises a driving motor and a pump head; the impeller and the first annular magnet are positioned inside the pump head; the driving device and the pump head are mutually independent; the driving device also comprises a second annular magnet and a shell, the second annular magnet is fixedly arranged at the top of the driving motor, and the driving motor and the second annular magnet are both arranged in the shell; the driving motor is used for driving the second annular magnet to rotate; the second annular magnet just is used for driving first annular magnet rotation through magnetic force to first annular magnet, and first annular magnet and second annular magnet are isolated each other and not in external contact in this application, are favorable to reducing the inside laying dust condition of driving motor, also are favorable to avoiding first annular magnet and second annular magnet collision damage simultaneously.

Description

Isolated water pump

Technical Field

The utility model relates to a water pump, in particular to an isolated water pump.

Background

In the prior art, a driving force of a driving motor is transmitted to an impeller by arranging magnets on the driving motor and the impeller through magnetic force, so that the traditional transmission mode of a transmission shaft is replaced.

However, this water pump driving motor one side's magnet is connected outside through the pivot, the pivot with stretch out outside then the pivot can have certain clearance between pivot and the driving motor, on the one hand, outside dust enters into driving motor inside through the clearance easily and leads to inside laying dust so that damage, on the other hand, the magnet setting of driving motor one side realizes the cooperation in the motor outside and through the mounting means of embedding and impeller, collide with magnet easily when installation and dismantlement and damage magnet, so that drive efficiency descends or can't realize the drive.

Accordingly, the prior art is in need of improvement and development.

SUMMERY OF THE UTILITY MODEL

The purpose of this application is providing an isolated water pump, can effectively avoid external dust to get into the inside influence driving motor work of driving motor on the one hand, and on the other hand is used for the magnet of transmission power all with external isolated, effectively avoids magnet to receive the collision and damage.

The technical scheme of the application is as follows:

an isolated water pump, includes impeller and drive arrangement, drive arrangement includes driving motor, wherein, still includes:

the pump head is internally provided with a first rotating shaft, an impeller is sleeved on the first rotating shaft, and a first annular magnet is arranged at the bottom of the impeller; the impeller and the first ring magnet are both located inside the pump head; the first annular magnet can rotate around the first rotating shaft along with the impeller; the pump head is used for driving the condensed water to flow;

the driving device and the pump head are mutually independent; the driving device further comprises a second annular magnet and a casing, the second annular magnet is arranged at the top of the driving motor, and the driving motor and the second annular magnet are both arranged inside the casing; the casing is used for sealing the driving motor and the second annular magnet; the driving motor is used for driving the second annular magnet to rotate; the second annular magnet is opposite to the first annular magnet and used for driving the first annular magnet to rotate through magnetic force.

The application provides an isolated water pump, driving motor and second annular magnet all are surrounded by the casing, need not to set up the pivot drive magnet externally and rotate, have eliminated the clearance, effectively avoid the dust to get into inside the motor, and simultaneously, first annular magnet and second annular magnet set up respectively inside pump head and casing, and effective isolated first annular magnet and second annular magnet contact with external world, guarantee can not damage first annular magnet and second annular magnet when loading and unloading.

Further, the pump head includes pump cover and pump seat, the pump seat top is provided with a plurality of hasps, the hasp is circumference and evenly arranges, the pump seat pass through the hasp with pump cover fixed connection.

The pump base and the pump cover are fixed through the lock catch, common screw fixation is avoided, screw use is reduced, and the assembly and disassembly operations are simplified.

Further, an inner cavity and an outer cavity are arranged inside the machine shell, and the inner cavity is separated from the outer cavity and is surrounded by the outer cavity along the circumferential direction;

the driving motor comprises a rotor and a stator, and the rotor is arranged in the inner cavity; the stator is mounted in the outer cavity.

The rotor and the stator are respectively arranged in the inner cavity and the outer cavity, and the inner cavity and the outer cavity are mutually separated, so that the other part cannot be accidentally damaged when the rotor or the stator is assembled and disassembled.

Furthermore, the top of rotor is provided with the carousel, set up annular groove on the carousel, second annular magnet inlays in the annular groove.

The second annular magnet is fixed on the turntable in an embedding mode, so that the installation is convenient, and the positioning accuracy is ensured.

Furthermore, a fixing piece is arranged on the rotor, a first bearing is embedded in the fixing piece, and the rotor penetrates through the first bearing and is fixed in the inner cavity through the fixing piece.

Furthermore, the top of the pump base is also provided with an annular boss, when the pump base is connected with the pump cover, the annular boss is embedded into the pump cover, and the peripheral surface of the outer side of the annular boss is tightly attached to the peripheral surface of the inner side of the pump cover.

Furthermore, the top of the pump cover is also provided with a detachable upper cover plate, the inner sides of the periphery of the bottom of the upper cover plate are provided with reverse buckles, and the upper cover plate is buckled on the pump cover through the reverse buckles.

Furthermore, a plurality of water inlet holes are formed in the top of the upper cover plate.

Further, the first ring magnet is disposed inside the impeller.

Further, the pump head also includes a water outlet for connecting with an external pipeline to drain condensed water.

The utility model has the beneficial effects that: the rotating shafts matched with the first annular magnet and the second annular magnet are respectively arranged in the pump head and the machine shell when the first annular magnet and the second annular magnet rotate, so that no gap contacting with the outside exists, and the external dust is effectively reduced from entering the pump head and the machine shell; simultaneously, first ring magnet and second ring magnet are surrounded by pump head and casing respectively, do not have any cooperation structure between first ring magnet and the second ring magnet, consequently can effectively avoid first ring magnet and second ring magnet to take place unexpected collision and lead to damaging when loading and unloading pump head and drive arrangement.

Drawings

Fig. 1 is a schematic structural diagram of an isolated water pump according to an embodiment of the present disclosure.

Fig. 2 is a structural sectional view of an isolated water pump according to an embodiment of the present disclosure.

Fig. 3 is a schematic structural diagram of a pump head in an embodiment of the present application.

Fig. 4 is an exploded view of the structure of the pump head in the embodiment of the present application.

Fig. 5 is a schematic structural diagram of a pump head after a pump base is separated in the embodiment of the present application.

Fig. 6 is a partial structural diagram of reference numeral a in fig. 5.

Fig. 7 is an exploded view of the internal structure of the driving device according to the embodiment of the present application after the casing is removed.

Fig. 8 is a bottom view of the upper cover plate in the embodiment of the present application.

Description of reference numerals:

100. a pump head; 110. an impeller; 120. a first ring magnet; 130. a pump cover; 131. a second landing; 1311. a second inclined plane; 1312. round corners; 140. a pump mount; 141. locking; 1411. a first landing; 1412. a first inclined plane; 142. An annular boss; 150. an upper cover plate; 151. reversing; 152. a water inlet hole; 160. a water outlet; 210. a second annular magnet; 220. a housing; 221. an inner cavity; 222. an outer cavity; 231. a rotor; 232. a stator; 240. a turntable; 250. a fixing member; 260. a first bearing.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The following disclosure provides many different embodiments or examples for implementing different features of the utility model. To simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, the present invention provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize applications of other processes and/or uses of other materials.

In real life, most of the impellers and the motors in the water pump are fixedly connected, and a close assembly relationship exists between the impellers and the motors. In practical application, when the water pump breaks down, for example, after the water pump is used many times, its impeller may receive the water erosion and appear the damage of different degree to the flow that the water pump output reduces, or motor circuit ageing leads to unable the start-up, or the motor accident appears the short circuit and leads to burning out etc. can take apart the water pump and maintain impeller or motor under general condition, nevertheless because impeller and motor closely cooperate each other, another part is damaged by accident very easily when dismantling the maintenance. For example, when the impeller fails, the rotating shaft of the motor is easily damaged if the impeller needs to be detached from the motor; for another example, when the motor fails, the impeller needs to be detached from the motor, which may easily cause deformation or chipping of the impeller. Even in some cases where the repair is impossible, the user can only choose to scrap the entire part, resulting in a waste of good parts of the resources.

The drive power transmission with driving motor is realized to another part water pump through magnetic force on the impeller, in practical application, the magnet of driving motor one side sets up outside driving motor through being connected with the pivot, because need driving magnet rotatory, its pivot position must have certain clearance, consequently, use for a long time after lead to the inside a large amount of dusts of gathering of driving motor, lead to influencing driving motor normal operating, furthermore, when in actual use, the magnet of driving motor one side need imbed in the impeller and form the cooperation with the magnet of impeller one side, just can realize the impeller rotation on transmitting drive power to the impeller through magnetic force, consequently, in handling process, magnet has probably to take place to rub or collide with the structure of impeller and lead to magnet impaired, or magnet exposes outside and takes place to collide with external object and lead to the damage, so that the unable normal use of water pump.

In certain preferred embodiments, there is provided an isolated water pump, referring to fig. 1 and 2, comprising an impeller 110 and a drive device comprising a drive motor, wherein:

the pump head 100, a first rotating shaft is installed inside the pump head 100, an impeller 110 is sleeved on the first rotating shaft, and a first annular magnet 120 is arranged at the bottom of the impeller 110; the impeller 110 and the first ring magnet 120 are both located inside the pump head 100; the first ring magnet 120 is rotatable with the impeller 110 about a first axis of rotation; the pump head 100 is used for driving the condensed water to flow;

the drive is independent of the pump head 100; the driving device further comprises a second annular magnet 210 and a housing 220, the second annular magnet 210 is arranged on the top of the driving motor, and the driving motor and the second annular magnet 210 are both arranged inside the housing 220; the casing 220 serves to seal the driving motor and the second ring magnet 210; the driving motor is used for driving the second annular magnet 210 to rotate; the second ring magnet 210 faces the first ring magnet 120 and serves to rotate the first ring magnet 120 by magnetic force.

In this embodiment, impeller 110 and motor adopt the design of alternate segregation, and the moment of torsion of motor output is used in second annular magnet 210 and drives first annular magnet 120 through magnetic force effect and rotate, has replaced the mode of traditional transmission shaft transmission moment of torsion, does not have inseparable cooperation relation between impeller 110 and the motor for when maintaining the water pump, also can independently the dismouting to the part of trouble, accidental damage normal part when effectively avoiding maintaining. For example, if the impeller 110 fails, the user only needs to repair or replace the pump head 100 alone, and the motor and other components in the drive device are not affected.

In addition, driving motor and second annular magnet 210 all install inside casing 220, and driving motor's pivot need not set up outside casing 220, has consequently reduced the gap between pivot and the casing 220, effectively avoids the dust to get into driving motor inside influence driving motor's operation through the gap.

Furthermore, the second ring magnet 210 is disposed in the housing 220, and the first ring magnet 120 is disposed in the pump head 100, and due to the isolation effect of the housing 220 and the pump head 100, there is no matching relationship (such as engagement, locking, etc.) between the first ring magnet 120 and the second ring magnet 210, so that when a user installs or removes the pump head 100 and the driving device, the first ring magnet 120 and the second ring magnet 210 will not collide with other structures, or the first ring magnet 120 and the second ring magnet 210 will not collide with external objects.

In some embodiments, two grooves are provided on the outside for mounting and fixing the pump head 100 and the driving device, respectively, after mounting, the bottom surface of the pump head 100 and the top surface of the driving device need to be kept opposite, and the pump head 100 and the driving device can be tightly attached to each other, or the interval can be adjusted within a certain range.

It should be noted that, in use, the bottom surface of the pump head 100 and the top surface of the driving device are kept facing each other, so that the first ring magnet 120 faces the second ring magnet 210, so that the first ring magnet 120 can be affected by the magnetic field of the second ring magnet 210, and the first ring magnet 120 is driven to rotate when the second ring magnet 210 rotates, thereby realizing the basic function of the water pump to deliver water flow; furthermore, the spacing between the pump head 100 and the drive means is related to the range of action of the magnetic field between the first ring magnet 120 and the second ring magnet 210 (the larger the range of action, the larger the adjustment range of the spacing between the pump head 100 and the drive means, and vice versa), so it is necessary to ensure that the spacing between the pump head 100 and the drive means is not too large, beyond the range of action of the magnetic field, so that the second ring magnet 210 cannot drive the first ring magnet 120 to rotate.

In practical applications, the impeller 110 needs to be in contact with flowing water frequently, and the rotating shaft and the blades are easily corroded or scaled by the water, so that the probability of the failure of the impeller 110 is high. Typically, the impeller 110 is surrounded by the pump housing, and most of the housing is assembled and secured with screws, which over time become so rusty that it is difficult to remove the screws with conventional tools, making the removal of the housing the most difficult step in the maintenance process.

In some preferred embodiments, referring to fig. 3 and 4, the pump head 100 includes a pump cover 130 and a pump base 140, the top of the pump base 140 is provided with a plurality of locking buckles 141, the locking buckles 141 are uniformly arranged in the circumferential direction, and the pump base 140 is fixedly connected with the pump cover 130 through the locking buckles 141.

The lock catch 141 is curved upwards, and a first step 1411 is arranged on the lower side of the end part far away from the pump base 140; seted up a plurality of second terraces 131 on pump cover 130, second terraces 131 are circumference and evenly arrange, a through-hole has all been seted up to one side of each second terraces 131 on pump cover 130, every hasp 141 homoenergetic enough passes a through-hole, the user is through inserting each hasp 141 to each through-hole, and rotatory pump seat 140 or pump cover 130 make first terraces 1411 lock on second terraces 131, thereby realize the fixed connection between pump cover 130 and the pump seat 140, when needs are dismantled, only need reverse rotation pump seat 140 or pump cover 130 to relieve the lock connection between first terraces 1411 and the second terraces 131 promptly.

In some embodiments, referring to fig. 5 and 6, the underside of the end of the latch 141 remote from the pump mount 140 is further provided with a first ramp 1412; a second inclined surface 1311 is arranged on one side, close to the through hole, of the second step 131, and a round corner 1312 is arranged on one side, far away from the through hole, of the second step;

when the pump cover 130 and the pump base 140 are attached, the first inclined surface 1412 and the second inclined surface 1311 contact with each other along with the rotation of the pump base 140 or the pump cover 130, and the lock catch 141 is slightly deformed under the guiding action of the second inclined surface 1311, so that the first step 1411 can pass over the second step 131, and finally the first step 1411 is locked on the second step 131.

When the pump cover 130 and the pump base 140 are detached, the first step 1411 and the fillet 1312 are in contact with each other along with the reverse rotation of the pump base 140 or the pump cover 130, and the latch 141 is slightly deformed by the lead of the fillet 1312, so that the first step 1411 can pass over the second step 131, and finally the first step 1411 is separated from the second step 131.

The first inclined surface 1412, the second inclined surface 1311 and the rounded corner 1312 mainly serve as a guide for the pump base 140 to be fastened and fixed to the pump cover 130 by the latch 141.

In practical application, most of the motors have the rotor and the stator installed in the same chamber, and when the rotor or the stator needs to be repaired, the rotor or the stator is easy to collide during being taken out, so that the rotor or the stator is damaged.

In certain preferred embodiments, referring to fig. 2 and 7, the casing 220 is internally provided with an inner cavity 221 and an outer cavity 222, the inner cavity 221 being separated from the outer cavity 222 and surrounded by the outer cavity 222 in a circumferential direction;

the driving motor comprises a rotor 231 and a stator 232, wherein the rotor 231 is arranged in the inner cavity 221; a stator 232 is mounted in the outer cavity 222.

In this embodiment, the inner cavity 221 and the outer cavity 222 are separated by a thin wall, which does not affect the magnetic force generated by the energization of the winding in the stator to drive the rotor 231 to rotate, and can effectively separate the rotor 231 from the stator 232, so that the rotor 231 or the stator 232 is not collided with each other when being taken out for maintenance, thereby effectively protecting the rotor 231 and the stator 232.

In some embodiments, referring to fig. 2 and 7, a turntable 240 is disposed on the top of the rotor 231 (specifically, the turntable is disposed on the top of the rotating shaft of the rotor), an annular groove is formed on the turntable 240, and the second annular magnet 210 is embedded in the annular groove. Compared with the method that the second annular magnet 210 is directly sleeved on the top of the rotor 231, the second annular magnet 210 is fixed on the turntable 240 in an embedding manner, so that the second annular magnet 210 can be well positioned and fixed.

In practical application, the bearing has all been cup jointed at the rotor both ends among the general motor, when needing to dismantle and take out the rotor, all need to take out the bearing of direction one end and demolish earlier, just can take out the rotor, however when manufacturing the motor, generally all can add lubricating grease on the bearing, and lubricating grease mixes with the dust in the air, and lubricating grease can become dirty after using a period of time, and the process of taking out often can make dirty both hands or instrument.

In some preferred embodiments, referring to fig. 2 and 7, the rotor 231 is provided with a fixing member 250, the fixing member 250 is embedded with a first bearing 260, and the rotor 231 passes through the first bearing 260 and is fixed in the inner cavity 221 by the fixing member 250 (specifically, the upper part of the rotating shaft of the rotor passes through the first bearing 260).

In this embodiment, the rotor 231 is taken out of and loaded into the inner cavity 221 from a side close to the turntable 240, the inner cavity 221 includes a vertically downward cavity, a second bearing is installed at the bottom of the cavity, when the rotor 231 is installed, one end of the rotor 231, which is far away from the turntable 240, is inserted into the second bearing (specifically, the lower portion of the rotating shaft of the rotor passes through the second bearing), the rotor 231 is supported by the second bearing, the fixing member 250 is sleeved on the end of the rotor 231, which is provided with the turntable 240, and the fixing member 250 is pressed into the cavity to complete the installation of the rotor; when the rotor 231 is taken out, a user can take out the rotor 231 only by pulling out the fixing piece 250 on the rotor 231; by indirectly taking out the first bearing 260 through the fixing member 250 to release the restriction of the rotor 231, it is possible to prevent both hands from coming into contact with the first bearing 260, and to prevent both hands from coming into contact with the grease on the first bearing 260.

In some embodiments, referring to fig. 4, the top of the pump base 140 is further provided with an annular boss 142, when the pump base 140 and the pump cover 130 are connected to each other, the annular boss 142 is embedded inside the pump cover 130, and the outer circumferential surface of the annular boss 142 is tightly attached to the inner circumferential surface of the pump cover 130. The annular boss 142 is arranged to enable the pump base 140 and the pump cover 130 to be tightly attached to each other, so that water leakage of the pump head 100 is avoided when the pump head 100 operates, and the sealing performance of the pump head 100 is greatly improved.

In some embodiments, referring to fig. 4 and 8, a detachable upper cover plate 150 is further disposed on the top of the pump cap 130, an inverted buckle 151 is disposed on the inner side of the periphery of the bottom of the upper cover plate 150, and the upper cover plate 150 is fastened to the pump cap 130 through the inverted buckle 151. The detachable upper cover plate 150 is provided to facilitate the user to open the upper cover plate 150 to observe the operating status of the impeller 110, and when the pump head 100 fails, the upper cover plate 150 can be removed first to observe and find out the location of the failure.

Further, referring to fig. 4 and 8, a plurality of water inlet holes 152 are formed at the top of the upper cover plate 150. The condensed water in the air conditioner enters the pump head 100 through the inlet hole 152 and is taken away by the rotation of the impeller 110.

In practice, the first ring magnet 120 may be mounted on the surface of the bottom of the impeller 110, but since the pump head 100 is mainly used to move water, if the first ring magnet 120 is exposed, impurities in the water may contaminate the first ring magnet 120, resulting in scaling of the first ring magnet 120.

In certain preferred embodiments, and with reference to fig. 2, the first ring magnet 120 is disposed inside the impeller 110. The first ring magnet 120 is isolated from the condensed water, and the condensed water is effectively prevented from polluting the first ring magnet 120.

In certain embodiments, the pump head 100 further includes a water outlet 160, the water outlet 160 for connecting with external tubing to drain away condensed water. The impeller 110 drives the condensed water to flow toward the water outlet 160, thereby discharging the condensed water.

In summary, although the present invention has been described with reference to the preferred embodiments, the above-described preferred embodiments are not intended to limit the present invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, therefore, the scope of the present invention shall be determined by the appended claims.

Claims (10)

1. An isolated water pump comprising an impeller (110) and a drive arrangement, the drive arrangement comprising a drive motor, characterized in that it further comprises:

the pump head (100), a first rotating shaft is installed inside the pump head (100), the impeller (110) is sleeved on the first rotating shaft, and a first annular magnet (120) is arranged at the bottom of the impeller (110); the impeller (110) and the first ring magnet (120) are both located inside the pump head (100); the first ring magnet (120) can rotate around the first rotating shaft along with the impeller (110); the pump head (100) is used for driving condensed water to flow;

the drive means is independent of the pump head (100); the driving device further comprises a second annular magnet (210) and a casing (220), the second annular magnet (210) is arranged on the top of the driving motor, and the driving motor and the second annular magnet (210) are both arranged inside the casing (220); the casing (220) is used for sealing the driving motor and the second annular magnet (210); the driving motor is used for driving the second annular magnet (210) to rotate; the second annular magnet (210) is opposite to the first annular magnet (120) and is used for driving the first annular magnet (120) to rotate through magnetic force.

2. The isolated water pump of claim 1, wherein the pump head (100) comprises a pump cover (130) and a pump base (140), a plurality of locking buckles (141) are arranged on the top of the pump base (140), the locking buckles (141) are circumferentially and uniformly arranged, and the pump base (140) is fixedly connected with the pump cover (130) through the locking buckles (141).

3. The isolated water pump according to claim 1, wherein the housing (220) is internally provided with an inner chamber (221) and an outer chamber (222), the inner chamber (221) being separated from the outer chamber (222) and being surrounded by the outer chamber (222) in a circumferential direction;

the driving motor comprises a rotor (231) and a stator (232), the rotor (231) is installed in the inner cavity (221); the stator (232) is mounted in the outer cavity (222).

4. The isolated water pump of claim 3, wherein a rotary disc (240) is arranged at the top of the rotor (231), an annular groove is formed in the rotary disc (240), and the second annular magnet (210) is embedded in the annular groove.

5. The isolated water pump according to claim 4, wherein a fixing piece (250) is arranged on the rotor (231), a first bearing (260) is embedded in the fixing piece (250), and the rotor (231) penetrates through the first bearing (260) and is fixed in the inner cavity (221) through the fixing piece (250).

6. The isolated water pump according to claim 2, wherein an annular boss (142) is further disposed on a top of the pump base (140), and when the pump base (140) and the pump cover (130) are connected to each other, the annular boss (142) is embedded into the pump cover (130), and an outer circumferential surface of the annular boss (142) is tightly attached to an inner circumferential surface of the pump cover (130).

7. The isolated water pump according to claim 2, wherein a detachable upper cover plate (150) is further disposed on the top of the pump cover (130), an inverted buckle (151) is disposed on the inner side of the periphery of the bottom of the upper cover plate (150), and the upper cover plate (150) is fastened to the pump cover (130) through the inverted buckle (151).

8. The isolated water pump of claim 7, wherein a plurality of water inlet holes (152) are formed at the top of the upper cover plate (150).

9. The isolated water pump of claim 1, wherein the first ring magnet (120) is disposed inside the impeller (110).

10. The isolated water pump of claim 1, wherein the pump head (100) further comprises a water outlet (160), the water outlet (160) for connection with external piping to drain away condensed water.

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