A magnetic levitation self-priming pump

Abstract

The present invention provides a magnetic levitation self-priming pump, comprising a pump body, a rotor, a pump cover and a motor, wherein the pump cover is arranged on one side of the pump body, and the motor is arranged on the other side of the pump body, a pump chamber for accommodating the rotor is formed between the pump cover and the pump body, the rotor is suspended and arranged in the pump chamber without contact, a first inlet for liquid inflow and a second inlet for filling or exhausting are arranged on the pump cover, the first inlet and the second inlet are both located above the rotation axis of the rotor, so that before the initial startup or restarting after a long shutdown, the liquid poured into the pump chamber can flow into the pump chamber under the action of gravity, and at the same time, the height of the second inlet is much higher than the height of the pump chamber, and the liquid level of the liquid poured into the pump chamber through the second inlet can reach the height of the first inlet, at this time, the pump chamber can be filled with liquid, which is convenient for starting the self-priming process.

Description

Technical Field

[0001] The present application relates to the technical field of magnetic levitation pumps, and in particular to a magnetic levitation self-priming pump. Background Art

[0002] The magnetic levitation self-priming pump is a magnetic levitation pump with self-priming function. Its characteristic is that after starting, it does not need to fill the pipeline with water in advance or use external force to draw a vacuum. Instead, it relies on its own design characteristics to discharge the air in the pump chamber and suck in the liquid whose level is lower than the pump body and lift it to the required height.

[0003] Before the magnetic levitation self-priming pump is started for the first time or restarted after a long period of shutdown, a certain amount of liquid needs to be pre-injected into the pump chamber to form a sealing liquid ring to help start the self-priming process. In order to facilitate the infusion of liquid into the pump chamber, an infusion port for infusing liquid is usually set. In the prior art, the inlet of the magnetic levitation pump is coaxial with the rotor rotation axis, the position is low, and there is no separate infusion port. When the liquid level poured into the pump chamber reaches the inlet of the magnetic levitation pump, liquid can no longer be infused into the pump chamber, resulting in less liquid in the pump chamber, and less liquid in the pump chamber is not conducive to starting the self-priming process. Summary of the invention

[0004] In order to solve the above technical problems, the present application provides a magnetic levitation self-priming pump, including a pump body, a rotor, a pump cover and a motor, the pump cover is arranged on one side of the pump body, the motor is arranged on the other side of the pump body, a pump cavity is formed between the pump cover and the pump body, the rotor is suspended and contactlessly arranged in the pump cavity, and the pump cover is provided with a first inlet for liquid inflow and a second inlet for filling or exhausting water, and the first inlet and the second inlet are both located above the rotation axis of the rotor.

[0005] In some embodiments of the present application, the pump body includes a gas-liquid separation part, a water outlet node is provided on the gas-liquid separation part, an outlet for liquid or gas to flow out is provided on the water outlet node, and an extension direction of the outlet is parallel to an extension direction of the second inlet.

[0006] In some embodiments of the present application, the gas-liquid separation part is arranged at the highest point of the pump cavity.

[0007] In some embodiments of the present application, a first gas-liquid separation cavity is provided in the gas-liquid separation part, a second gas-liquid separation cavity is provided in the water outlet node, and the first gas-liquid separation cavity and the second gas-liquid separation cavity together form a gas-liquid separation chamber.

[0008] In some embodiments of the present application, the outlet includes a first water outlet chamber, a second water outlet chamber, and a third water outlet chamber that are sequentially interconnected, and the first water outlet chamber is interconnected with the second gas-liquid separation chamber.

[0009] In some embodiments of the present application, a first flow channel and a second flow channel are further provided in the pump cover; the first flow channel is interconnected with the first inlet and the second inlet; one end of the second flow channel is connected to the first flow channel, and the other end is connected to the pump chamber; the first inlet, the second inlet, the first flow channel, the second flow channel, the pump chamber, the gas-liquid separation chamber and the outlet form a liquid flow channel.

[0010] In some embodiments of the present application, an annular groove surrounding the first flow channel is provided on the pump cover, and the annular groove opens toward the pump chamber.

[0011] In some embodiments of the present application, a third flow channel is provided on the pump cover, and the third flow channel is provided above the second flow channel. One end of the third flow channel is connected to the first flow channel, and the other end of the third flow channel is connected to the annular groove.

[0012] In some embodiments of the present application, the outer wall of the annular groove rises continuously in the direction toward the opening.

[0013] In some embodiments of the present application, a first solenoid valve is disposed in the third flow channel, and the first solenoid valve is used to control the opening and closing of the third flow channel.

[0014] In some embodiments of the present application, a baffle is provided in the gas-liquid separation chamber.

[0015] In some embodiments of the present application, a second solenoid valve is provided on the second inlet, and the second solenoid valve is used to control the opening and closing of the second inlet.

[0016] In some embodiments of the present application, a third solenoid valve and a water tank are provided on the outlet, and the third solenoid valve is used to control the connection and closing between the water tank and the outlet.

[0017] In some embodiments of the present application, an extension direction of the second inlet is perpendicular to an extension direction of the first inlet.

[0018] Compared with the prior art, the present invention has the following advantages and beneficial effects: in the magnetic levitation self-priming pump of the present application, a first inlet for liquid inflow and a second inlet for filling or exhausting are arranged on the pump cover, and the first inlet and the second inlet are both located above the rotation axis of the rotor, so that before the initial startup or restarting after a long shutdown, the liquid poured into the pump chamber can flow into the pump chamber under the action of gravity, and at the same time, the height of the second inlet is much higher than the height of the pump chamber, and the liquid level of the liquid poured into the pump chamber through the second inlet can reach the height of the first inlet. At this time, the pump chamber can be filled with liquid, which is convenient for starting the self-priming process.

[0019] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings constituting a part of this document are used to provide a further understanding of this document. The exemplary embodiments and descriptions of this document are used to explain this document and do not constitute an improper limitation on this document. In the accompanying drawings:

[0021] Figure 1 is a front view of a magnetically suspended self-priming pump provided by an exemplary embodiment of the present application;

[0022] Figure 2 It is a left view of a magnetically suspended self-priming pump provided by an exemplary embodiment of the present application;

[0023] Figure 3 is a rear view of a magnetically suspended self-priming pump provided by an exemplary embodiment of the present application;

[0024] Figure 4 is a top view of a magnetically suspended self-priming pump provided by an exemplary embodiment of the present application;

[0025] Figure 5 is a partial cross-sectional view of a magnetically suspended self-priming pump provided by an exemplary embodiment of the present application;

[0026] Figure 6 yes Figure 5 Sectional view at CC;

[0027] Figure 7 yes Figure 5 Sectional view at DD in the middle;

[0028] Figure 8 is a front view of a pump cover provided by an exemplary embodiment of the present application;

[0029] Fig. 9 is a left side view of a pump cover provided by an exemplary embodiment of the present application;

[0030] Fig.10 is a rear view of a pump cover provided by an exemplary embodiment of the present application;

[0031] Fig.11 is a top view of a pump cover provided by an exemplary embodiment of the present application;

[0032] Fig.12 is a cross-sectional view of a pump cover provided by an exemplary embodiment of the present application;

[0033] Fig.13 It is a cross-sectional view of a pump body and a water outlet joint provided by an exemplary embodiment of the present application.

[0034] In the figure:

[0035] 10. Pump body; 101. Gas-liquid separation part; 102. Pump chamber; 103. First gas-liquid separation chamber; 104. Water outlet section; 1041. Second gas-liquid separation chamber; 1042. First water outlet chamber; 1043. Second water outlet chamber; 1044. Third water outlet chamber; 105. Outlet; 106. Baffle; 20. Pump cover; 201. First inlet; 202. Second inlet; 203. First flow channel; 204. Second flow channel; 205. Annular groove; 206. Third flow channel; 207. Second solenoid valve; 30. Rotor; 40. Motor. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present application. It should be noted that, in the absence of conflict, the embodiments in the present application and the features in the embodiments can be combined with each other arbitrarily.

[0037] In the related art, before the magnetic levitation self-priming pump is started for the first time or restarted after a long period of shutdown, a certain amount of liquid needs to be pre-filled into the pump chamber to form a sealing liquid ring to help start the self-priming process. In order to facilitate the filling of liquid into the pump chamber, a filling port for filling liquid is usually set. In the prior art, the inlet of the magnetic levitation pump is coaxial with the rotor rotation axis, the position is low, and there is no separate filling port. When the liquid level poured into the pump chamber reaches the inlet of the magnetic levitation pump, liquid can no longer be poured into the pump chamber, resulting in less liquid in the pump chamber, and less liquid in the pump chamber is not conducive to starting the self-priming process.

[0038] Based on this, an exemplary embodiment of the present application provides a magnetic levitation self-priming pump, in which a first inlet for liquid inflow and a second inlet for filling or exhausting are provided on the pump cover of the self-priming pump, and the first inlet and the second inlet are both located above the rotation axis of the rotor. In this way, before the initial startup or restarting after a long period of shutdown, the liquid poured into the pump chamber can flow into the pump chamber under the action of gravity. At the same time, the height of the second inlet is much higher than the height of the pump chamber. The liquid level of the liquid poured into the pump chamber through the second inlet can reach the height of the first inlet. At this time, the pump chamber can be filled with liquid, which is convenient for starting the self-priming process.

[0039] An exemplary embodiment of the present application provides a magnetically suspended self-priming pump, such as Figures 1 to 7As shown, the self-priming pump includes a pump body 10, a rotor 30, a pump cover 20 and a motor 40. The pump cover 20 is arranged on one side of the pump body 10, and the motor 40 is arranged on the other side of the pump body 10. A pump chamber 102 for accommodating the rotor 30 is formed between the pump cover 20 and the pump body 10; the rotor 30 is suspended and non-contactly arranged in the pump chamber 102, and a first inlet 201 for liquid inflow and a second inlet 202 for water filling or exhaust are arranged on the pump cover 20. Both the first inlet 201 and the second inlet 202 are located above the rotation axis of the rotor 30. When liquid is poured into the pump chamber 102 through the second inlet 202 before restarting after the initial startup or long-term shutdown, the pump chamber 102 can be filled with liquid, which is convenient for starting the self-priming process.

[0040] In one embodiment, preferably, the extension direction of the second inlet 202 is perpendicular to the extension direction of the first inlet 201. At this time, the extension direction of the first inlet 201 is the horizontal direction of the pump; the second inlet 202 is arranged on one side of the first inlet 201, and the extension direction of the second inlet 202 is perpendicular to the extension direction of the first inlet 201, that is, the extension direction of the second inlet 202 is the vertical direction of the pump, and the first inlet 201 and the second inlet 202 are connected to each other. Of course, the arrangement form of the first inlet 201 and the second inlet 202 is not limited, as long as the height of the first inlet 201 and the second inlet 202 is higher than the rotation axis of the rotor 30, for example, the extension direction of the first inlet 201 can be in the horizontal direction, or at a certain angle to the horizontal direction; the extension direction of the second inlet 202 can be perpendicular to the extension direction of the first inlet 201, or at an acute angle or an obtuse angle to the extension direction of the first inlet 201. In this way, before the initial startup or restart after a long period of shutdown, the liquid poured into the pump chamber 102 can flow into the pump chamber 102 under the action of gravity. At the same time, the height of the second inlet 202 is much higher than the height of the pump chamber 102. The liquid level of the liquid poured into the pump chamber 102 through the second inlet 202 can reach the height of the first inlet 201. At this time, the self-priming process can be quickly started.

[0041] In one embodiment, if Figures 5 to 7 As shown, the pump body 10 includes a gas-liquid separation part 101, and a water outlet joint 104 is provided on the gas-liquid separation part 101. The water outlet joint 104 is provided with an outlet 105 for liquid or gas to flow out, and the extension direction of the outlet 105 is parallel to the extension direction of the second inlet 202, that is, the extension direction of the outlet 105 is defined as the vertical direction of the pump. The water outlet joint 104 and the gas-liquid separation part 101 are designed to be detachable, so that the exhaust and discharge flow channels inside the water outlet joint 104 can be processed first, and after the processing is completed, the water outlet joint 104 is installed on the pump body 10, so as to simplify the processing steps and difficulty of the flow channel, improve the processing convenience and efficiency, and reduce the processing cost.

[0042] like Fig.13 As shown, the water outlet section 104 includes a first section, a second section and a third section connected in sequence, the first section is a cuboid or a cube, and the second section and the third section are cylinders. The outlet 105 includes a first water outlet chamber 1042, a second water outlet chamber 1043 and a third water outlet chamber 1044 which are interconnected in sequence, and the first water outlet chamber 1042 is interconnected with the second gas-liquid separation chamber 1041 to form a flow channel for liquid and gas to flow out. Preferably, the diameter of the first water outlet chamber 1042 is smaller than the diameter of the third water outlet chamber 1044, and in this case, the first water outlet chamber 1042 can achieve the function of controlling the flow rate. According to the flow rate requirements, the water outlet section 104 can be modularly designed. For example, the size of the first section of the water outlet joint 104 can be kept unchanged, that is, the size of the installation interface between the water outlet joint 104 and the pump body 10 remains unchanged, and only the size of the second section and the third section is changed, and the first water outlet chamber 1042, the second water outlet chamber 1043 and the third water outlet chamber 1044 of different specifications are designed. By controlling the size of the first water outlet chamber 1042, the second water outlet chamber 1043 and the third water outlet chamber 1044, the purpose of controlling the flow rate is achieved, and according to the requirements of different flow rates, only the water outlet joints 104 of different specifications need to be replaced to meet the requirements of different flow rates. The water outlet joint 104 adopts a modular design. By replacing the water outlet joints 104 of different specifications, the flow rate of the pump can be controlled, and the function of changing the flow rate of the pump by only replacing the water outlet joint 104 is achieved, thereby improving the diversity of the pump.

[0043] In one embodiment, in order to improve the gas-liquid separation effect, the gas-liquid separation part 101 is arranged at the highest point of the pump cavity 102. A first gas-liquid separation cavity 103 is arranged in the gas-liquid separation part 101, and a second gas-liquid separation cavity 1041 is arranged in the water outlet node 104. The first gas-liquid separation cavity 103 and the second gas-liquid separation cavity 1041 together form a gas-liquid separation chamber. When the pump cavity 102 is first started or restarted after a long period of shutdown, water needs to be poured into the pump cavity 102. In the early stage of starting, the gas in the pump cavity 102 and the pipeline needs to be discharged, so gas-liquid separation is required. Since the density of the gas is less than the density of the liquid, the gas in the pump cavity 102 will be located on the upper part of the liquid. Compared with the design in which the gas-liquid separation part 101 is arranged on both sides of the highest point of the pump cavity 102, the gas-liquid separation part 101 is arranged at the highest point of the pump cavity 102, so that the gas is not easy to be retained in the pump cavity 102, so that the gas in the pump cavity 102 can be quickly discharged out of the pump, shortening the self-priming time.

[0044] like Figures 8 to 12As shown, a first flow channel 203 and a second flow channel 204 are also provided in the pump cover 20; the first flow channel 203 is interconnected with the first inlet 201 and the second inlet 202; one end of the second flow channel 204 is connected to the first flow channel 203, and the other end is connected to the pump chamber 102; the first inlet 201, the second inlet 202, the first flow channel 203, the second flow channel 204, the pump chamber 102, the gas-liquid separation chamber and the outlet 105 form a liquid flow channel. Before the pump works, it is first necessary to fill the pump chamber 102 with liquid through the second inlet 202 to start the self-priming process of the pump. After the rotor 30 rotates, under the action of centrifugal force, the rotating impeller pushes the liquid to the outlet 105 of the pump chamber 102, and a low-pressure area is formed in the center of the impeller. The liquid in the first flow channel 203 and the second flow channel 204 and the gas in the first inlet 201 and the water inlet pipe connected thereto are sucked into the pump chamber 102. The water from the external water source gradually fills the water inlet pipe under the action of atmospheric pressure until the gas in the first inlet 201 and the water inlet pipe connected thereto is completely sucked out, and the liquid fills the first inlet 201, the first flow channel 203, the second flow channel 204 and the pump chamber 102. The pump self-priming is completed and normal pumping operation begins.

[0045] like Figure 5 As shown, a U-shaped flow channel is formed between the first flow channel 203, the second flow channel 204, the pump chamber 102, the gas-liquid separation chamber and the outlet 105. Therefore, when liquid is poured into the pump chamber 102 through the second inlet 202, the liquid level on the pump chamber 102 and the gas-liquid separation chamber side can be maintained at the same horizontal plane as the liquid level on the first flow channel 203 side. Since the height of the second inlet 202 is much higher than the height of the pump chamber 102, it becomes extremely simple and easy to pour a certain amount of liquid into the pump chamber 102 to start the self-priming process of the pump.

[0046] In one embodiment, if Fig.12As shown, the pump cover 20 is provided with an annular groove 205 surrounding the first flow channel 203, and the annular groove 205 opens toward the pump chamber 102. The pump cover 20 is provided with a third flow channel 206, which is arranged above the second flow channel 204. One end of the third flow channel 206 is connected to the first flow channel 203, and the other end is connected to the annular groove 205. The cross-sectional shape of the third flow channel 206 can be circular, elliptical, rectangular, etc. Preferably, the third flow channel 206 is circular, and the cross-sectional size of the third flow channel 206 is smaller than the width of the bottom of the annular groove 205. Before the initial start or restart after a long shutdown, a certain amount of liquid needs to be poured into the pump chamber 102 to start the self-priming process of the pump. During the process of pouring liquid, if there is an object blocking the outlet 105 at the outlet 105, it will be difficult to pour liquid into the pump chamber 102 because the gas in the pump chamber 102 cannot be discharged. The third flow channel 206 and the annular groove 205 provided in the pump are connected to the pump chamber 102. When the outlet 105 is blocked by an object, when the liquid is poured into the pump chamber 102, the gas in the pump chamber 102 can flow into the first flow channel 203 through the third flow channel 206 and the annular groove 205, and finally be discharged through the second inlet 202, and the situation that the liquid cannot be poured will not occur. Of course, the annular groove 205 can also be omitted, and only the third flow channel 206 can be provided. The third flow channel 206 is connected to the pump chamber 102 and the first flow channel 203. When the liquid is poured into the pump chamber 102, the gas in the pump chamber 102 will flow to the first flow channel 203 through the third flow channel 206 and be discharged through the second outlet 105. In this case, the situation that the liquid cannot be poured will not occur.

[0047] Based on the above embodiment, a first solenoid valve (not shown in the figure) may be provided in the third flow channel 206, and the first solenoid valve is used to control the opening and closing of the third flow channel 206. Preferably, the first solenoid valve may be a one-way valve, and the gas can only flow from the pump chamber 102 side to the first flow channel 203 side. When liquid is poured into the pump chamber 102, if there is no object blocking the outlet 105, the gas in the pump chamber 102 can be discharged from the outlet 105, and the pressure in the pump chamber 102 will not rise, and the first solenoid valve is in a closed state; if the outlet 105 is blocked by an object, when liquid is poured into the pump chamber 102, the gas in the pump chamber 102 cannot be discharged, which will cause the pressure in the pump chamber 102 to rise. When the pressure in the pump chamber 102 rises to the first preset value, the control system controls the first solenoid valve to open, so that the gas in the pump chamber 102 flows into the first flow channel 203 and is finally discharged through the second inlet 202. After all the gas is discharged from the pump chamber 102, the pump chamber 102 is filled with liquid. At this time, the pressure on one side of the first solenoid valve in the pump chamber 102 will increase. When the pressure increases to a second preset value, the control system controls the first solenoid valve to close, and the pump starts pumping liquid.

[0048] In one embodiment, an exhaust valve (not shown in the figure) may also be provided in the third flow channel 206, and the exhaust valve is used to control the opening and closing of the third flow channel 206. When liquid is poured into the pump chamber 102, if the outlet 105 is blocked by an object, when the liquid level in the pump chamber 102 does not reach the exhaust valve position, the gravity on the movable parts in the exhaust valve is greater than the buoyancy, the exhaust valve is opened, and the gas in the pump chamber 102 can be discharged through the exhaust valve, the first flow channel 203 and the second inlet 202. When the liquid level in the pump chamber 102 reaches the exhaust valve position, the buoyancy on the movable parts in the exhaust valve is greater than the gravity, the exhaust valve is closed, and the pump chamber 102 is poured. When the liquid is poured to the first inlet 201, the pouring is completed, the second inlet 202 is closed, and the pump starts to self-prime and pump liquid.

[0049] In one embodiment, if Fig.12 As shown, the outer wall of the annular groove 205 rises continuously in the direction toward the opening, that is, the width of the annular groove 205 toward the pump chamber 102 is greater than the width of the connection between the annular groove 205 and the third flow channel 206, and the outer wall of the annular groove 205 toward the pump chamber 102 shows a tendency to expand outward. At this time, the first solenoid valve can be bidirectionally conducted under the control of the control system. When a certain amount of liquid needs to be poured into the pump chamber 102 to start the self-priming process of the pump before the initial start or restart after a long shutdown, the control system controls the first solenoid valve to conduct from one side of the pump chamber 102 to the side of the first flow channel 203. At this time, the gas in the pump chamber 102 can flow into the first flow channel 203 through the third flow channel 206 and be discharged through the second inlet 202. When all the gas in the pump chamber 102 is discharged, the pump chamber 102 is completely filled with liquid. When the pressure value reaches the second preset value, the control system controls the first solenoid valve to close from one side of the pump chamber 102 to the side of the first flow channel 203. Since the pipe connected to the first inlet 201 is full of gas, at the initial stage of the pump operation, the gas in the pipe will mix with the liquid to form a gas-liquid mixture and enter the pump together. At this time, the control system controls the first solenoid valve to conduct from the first flow channel 203 to the pump chamber 102, and part of the gas-liquid mixture will enter the pump chamber 102 through the third flow channel 206. Since the density of the gas is less than the density of the liquid, when the gas-liquid mixture enters the annular groove 205, the gas will rise above the liquid level, and finally enter the gas-liquid separation chamber and be discharged through the outlet 105. The outer wall of the annular groove 205 that rises continuously in the direction toward the opening provides space for the separation of gas and liquid in the gas-liquid mixture, so that the gas can rise above the liquid level, accelerate the gas-liquid separation, and improve the gas-liquid separation effect.

[0050] In order to improve the gas-liquid separation effect, in one embodiment, Fig.13As shown, a baffle 106 is provided in the gas-liquid separation chamber. In the initial stage of starting the magnetic levitation self-priming pump, the gas and liquid in the pump body 10 will flow toward the outlet 105 together. At this time, the baffle 106 can effectively block the upward movement of the liquid and let the liquid fall back, so that the gas can flow to the outlet 105 first, so as to accelerate the separation between the gas and the liquid, increase the effect of gas-liquid separation, prevent a large number of bubbles from appearing in the pumped liquid, prevent the generation of local high pressure and vibration, and maintain a stable flow output and a stable head.

[0051] The baffle 106 can be arranged in a variety of ways. For example, a spirally ascending baffle 106 can be arranged in the gas-liquid separation chamber to improve the gas-liquid separation effect; or a plurality of baffles 106 can be arranged in an alternating manner to improve the gas-liquid separation effect.

[0052] In one embodiment, in order to facilitate the perfusion of liquid into the pump chamber 102, a second solenoid valve 207 is provided on the second inlet 202. The second solenoid valve 207 can be connected to an external pipeline. The second solenoid valve 207 can be a one-way valve. The liquid can only flow into the second inlet 202 from the external pipeline. The second solenoid valve 207 is used to control the opening and closing of the second inlet 202.

[0053] In one embodiment, in order to facilitate the filling of liquid into the pump chamber 102, a third solenoid valve and a water tank are provided on the outlet 105, and the third solenoid valve is used to control the connection and closing between the water tank and the outlet 105. Liquid is provided in the water tank, and when liquid needs to be filled into the pump chamber 102, the control system controls the third solenoid valve to open, so that the liquid in the water tank flows into the pump chamber 102, which facilitates the filling of liquid and improves the efficiency of filling liquid.

[0054] In one embodiment, a fourth solenoid valve and a water tank can also be set on the water outlet node 104. The fourth solenoid valve can be bidirectionally conductive. When liquid needs to be poured into the pump chamber 102, the control system controls the fourth solenoid valve to be conductive from the water tank side to the outlet 105 side, so that the liquid in the water tank is poured into the pump chamber 102. When the pouring is completed, the control system controls the fourth solenoid valve to be closed, and the pump operates normally. At this time, the control system controls the fourth solenoid valve to be conductive from the outlet 105 side to the water tank side. Since the pressure in the pump chamber 102 is greater than the pressure in the water tank, the liquid in the pump chamber 102 can flow back to the water tank to replenish the liquid in the water tank, thereby realizing the circulation of the liquid in the water tank. After the liquid in the water tank is replenished, the fourth solenoid valve is closed.

[0055] In this application, the terms "comprises", "comprising" or any other variations thereof are intended to cover non-exclusive inclusion, so that an article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such article or device. In the absence of more restrictions, the elements defined by the sentence "comprising..." do not exclude the presence of other identical elements in the article or device comprising the elements.

[0056] Although the preferred embodiments of the present application have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present application.

[0057] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the intention of the present application also includes these modifications and variations.

Claims

1. A magnetic levitation self-priming pump, comprising a pump body, a rotor, a pump cover and a motor, wherein the pump cover is arranged on one side of the pump body, the motor is arranged on the other side of the pump body, a pump cavity is formed between the pump cover and the pump body, and the rotor is suspended and non-contactedly arranged in the pump cavity, characterized in that: The pump cover is provided with a first inlet for liquid inflow and a second inlet for water filling or exhaust, and the first inlet and the second inlet are both located above the rotation axis of the rotor; the pump body includes a gas-liquid separation part, the gas-liquid separation part is provided with a water outlet node, and the water outlet node is provided with an outlet for liquid or gas to flow out; The pump cover is also provided with a first flow channel and a second flow channel; the first flow channel is connected to the first inlet and the second inlet; one end of the second flow channel is connected to the first flow channel, and the other end is connected to the pump cavity; the first inlet, the second inlet, the first flow channel, the second flow channel, the pump cavity, the gas-liquid separation chamber and the outlet form a liquid flow channel; The pump cover is provided with an annular groove surrounding the second flow channel, and the opening of the annular groove faces the pump chamber; the pump cover is provided with a third flow channel, and the third flow channel is arranged above the second flow channel, one end of the third flow channel is connected to the first flow channel, and the other end is connected to the annular groove.

2. The magnetic levitation self-priming pump according to claim 1, characterized in that: An extending direction of the outlet is parallel to an extending direction of the second inlet.

3. The magnetic levitation self-priming pump according to claim 2 is characterized in that: The gas-liquid separation portion is arranged at the highest point of the pump chamber.

4. The magnetic levitation self-priming pump according to claim 2 is characterized in that: The gas-liquid separation part is provided with a first gas-liquid separation cavity, the water outlet node is provided with a second gas-liquid separation cavity, and the first gas-liquid separation cavity and the second gas-liquid separation cavity together form a gas-liquid separation chamber.

5. The magnetic levitation self-priming pump according to claim 4 is characterized in that: The outlet comprises a first water outlet chamber, a second water outlet chamber and a third water outlet chamber which are sequentially connected to each other, and the first water outlet chamber is connected to the second gas-liquid separation chamber.

6. The magnetic levitation self-priming pump according to claim 1, characterized in that: The outer wall of the annular groove rises continuously in a direction toward the opening.

7. The magnetic levitation self-priming pump according to claim 1, characterized in that: A first solenoid valve is disposed in the third flow channel, and the first solenoid valve is used to control the opening and closing of the third flow channel.

8. The magnetic levitation self-priming pump according to claim 4, characterized in that: A baffle is arranged in the gas-liquid separation chamber.

9. The magnetic levitation self-priming pump according to claim 1, characterized in that: The second inlet is provided with a second solenoid valve, and the second solenoid valve is used to control the opening and closing of the second inlet.

10. The magnetic levitation self-priming pump according to claim 1, characterized in that: The outlet is provided with a third solenoid valve and a water tank, and the third solenoid valve is used to control the connection and closing between the water tank and the outlet.

11. The magnetic levitation self-priming pump according to claim 1, characterized in that: An extending direction of the second inlet is perpendicular to an extending direction of the first inlet.

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