CN210509542U

CN210509542U - Flow-controllable liquid pump

Info

Publication number: CN210509542U
Application number: CN201820500025.1U
Authority: CN
Inventors: 刘光跃; 王天龙; 邵军钰
Original assignee: NINGBO JLT ELECTRIC CO Ltd
Current assignee: NINGBO JLT ELECTRIC CO Ltd
Priority date: 2018-04-10
Filing date: 2018-04-10
Publication date: 2020-05-12
Anticipated expiration: 2028-04-10

Abstract

The application discloses controllable type liquid pump of flow. Wherein the liquid pump includes: a fluid inlet (71), a fluid outlet (72), and a pump chamber (42). A part of the pump chamber (42) is formed by the flexible member (4), and the change in the volume of the pump chamber (42) is achieved by deformation of the flexible member (4). The liquid pump further includes: the motor (1), the motor shaft (11) of the motor (1) is provided with a rotating wheel (21); and a transmission mechanism (26) which is connected with the rotating wheel (21) and the flexible component (4) and converts the rotation of the rotating wheel (21) into a driving force for driving the flexible component to deform. The rotating wheel (21) is provided with magnetic poles (22) with different polarities. And the liquid pump further comprises a Hall sensor (9) which is configured to generate a pulse signal matched with the rotating speed of the motor (1) by sensing the magnetic poles (22) with different polarities.

Description

Flow-controllable liquid pump

Technical Field

The application relates to a liquid pump, particularly, relates to a controllable type liquid pump of flow.

Background

The diaphragm type miniature water pump is characterized by that it uses motor to provide circular motion, and utilizes a mechanical device to make the diaphragm (diaphragm form is lots) in the interior of water pump implement reciprocating motion so as to compress and stretch the air in the pump cavity, under the action of one-way valve plate a pressure difference is produced between water outlet or water inlet and external atmospheric pressure, and under the action of pressure difference the water is pressed into water inlet, and then discharged from water outlet. The miniature water pump is well applied to occasions such as small household appliances, medical appliances and the like, but the existing miniature water pump is generally difficult to achieve accurate regulation of flow.

Although the flow control of the water pump has been studied by the manufacturers, a micro water pump capable of accurately controlling the flow is developed, which comprises an upper cover, a valve seat, a water bag seat, a base shell, a water bag, a curved rod, a driving shaft, an eccentric wheel, a motor and an output circuit board: the motor is arranged on the base shell, a motor shaft of the motor extends into the base shell and then is directly connected with an eccentric wheel in the base shell, the eccentric wheel is connected with a curved bar through a driving shaft, a bracket at the upper end of the curved bar, which is outwards radial, is provided with a water bag, the water bag is arranged on a water bag seat, the water bag seat is arranged on the base shell in a sealing way, a valve seat is arranged on the water bag seat in a sealing way, a water inlet hole and a water outlet hole are arranged on the valve seat corresponding to each water bag, and a one-way valve is respectively; the upper cover is hermetically arranged on the valve seat, the upper cover forms a water outlet interface and a water inlet interface, the water inlet interface is communicated with each water inlet hole, and the water outlet interface is communicated with each water outlet hole. When the water pump works, the motor drives the eccentric wheel to be transmitted to the curved rod through the driving shaft, and then the water sac is driven to realize water inlet and outlet. Further, a photoelectric shielding sheet is formed on the eccentric wheel or the motor shaft in the radial direction corresponding to the photoelectric switch, the photoelectric shielding sheet is matched with the photoelectric switch to detect the motor rotating speed, the photoelectric switch is electrically connected with an output circuit board, and the output circuit board is used for being electrically connected with an external motor controller and sending motor rotating speed information to the external motor controller; when the water pump works, the rotating speed of the motor is detected through the photoelectric switch, the output circuit board sends the rotating speed to the motor controller outside, so that the motor controller can accurately control the rotating speed of the motor, and stable water flow under different back pressures with different amounts is obtained.

The photoelectric switch has the advantages of long detection distance, less limitation on a detected object and short response time, and can realize non-contact detection. However, the unclosed photodetection switch is very susceptible to contamination, which affects the accurate detection of the flow.

In addition, the conventional micro-fluid pump is fixed between the upper cover and the middle cover with only three screws. Therefore, although the upper cover and the middle cover press the gasket between the upper cover and the middle cover at the position where the screws are installed, the gasket is easily bulged at the position between the screws due to the reduction of the pressure of the screws, resulting in a less tight seal of the liquid pump.

In addition, the flow control device of the traditional liquid pump capable of controlling the flow is arranged in the shell of the pump body, and when the flow control device is polluted and needs to be cleaned, or when the flow control device needs to be maintained, only the pump shell is disassembled, and other structures in the pump shell are damaged easily.

Aiming at the problems that the photoelectric switch of the liquid pump has poor pollution resistance, the liquid pump is not tightly sealed, and the flow control device is not easy to replace, an effective solution is not provided at present.

SUMMERY OF THE UTILITY MODEL

An embodiment of the utility model provides a controllable type liquid pump of flow to it is poor to solve liquid pump photoelectric switch antipollution ability at least, and the liquid pump is sealed not tight, the difficult technical problem who changes of flow control device.

According to an aspect of the embodiments of the present invention, there is provided a liquid pump, including: a fluid inlet, a fluid outlet, and a pump chamber. The fluid inlet and the fluid outlet are respectively communicated with a pump chamber, the volume of the pump chamber can be changed so as to suck fluid into the pump chamber through the fluid inlet and discharge fluid from the pump chamber through the fluid outlet, a part of the pump chamber is formed by a flexible member, and the change of the volume of the pump chamber is realized by the deformation of the flexible member.

The liquid pump further includes: the motor rotating shaft of the motor is provided with a rotating wheel; and the transmission mechanism is connected with the rotating wheel and the flexible component and converts the rotation of the rotating wheel into driving force for driving the flexible component to deform.

The rotating wheel is also provided with magnetic poles with different polarities, and the liquid pump also comprises a Hall sensor which is configured to generate a pulse signal related to the rotating speed of the motor by sensing the magnetic poles with different polarities.

Optionally, the liquid pump further comprises a housing. The motor rotating shaft, the rotating wheel and the transmission mechanism are accommodated in the shell, wherein the Hall sensor is arranged at the position, corresponding to the rotating wheel, outside the shell.

Optionally, a socket for inserting the hall sensor is provided at a position outside the housing corresponding to the wheel.

Optionally, one end of the hall sensor inserted into the socket is provided with a first buckling part for being buckled with a second buckling part in the inner surface of the socket, so as to fix the hall sensor.

Optionally, the transmission mechanism includes a connecting rod and an impeller, wherein one end of the connecting rod is inserted into an eccentric hole formed on the runner in an inclined manner, and the other end of the connecting rod is inserted into a mounting hole formed on a side of the impeller facing the runner. And the impeller is connected to the flexible member.

Optionally, the flexible member is a cup.

Optionally, the liquid pump further comprises a controller and a counter. The counter is in communication connection with the Hall sensor, and the counter is configured to count pulse signals generated by the Hall sensor: the controller is in communication connection with the counter; and the controller is in communication with the motor.

Optionally, the liquid pump further comprises an upper cover and a middle cover, wherein the upper cover is provided with a fluid inlet and a fluid outlet. The middle cover is provided with a partial flow path from the fluid inlet to the pump chamber and a partial flow path from the pump chamber to the fluid outlet. A sealing gasket is arranged between the upper cover and the middle cover. Be provided with a plurality of third buckle portions on the side surface of upper cover: and a plurality of fourth buckling parts are arranged on the side surface of the middle cover and are respectively buckled with the third buckling parts, so that the upper cover and the middle cover are pressed against the sealing gasket.

Optionally, the upper surfaces of the upper cover and the middle cover are respectively provided with a plurality of through holes along the periphery for connecting the upper cover and the middle cover together through screws. The third buckling part is arranged along the periphery of the upper cover and is different from the through hole of the upper cover in position.

Optionally, the hall sensor is a bipolar latching hall sensor.

According to another aspect of the embodiments of the present invention, there is provided a liquid pump, including: the fluid pump includes a fluid inlet, a fluid outlet, and a pump chamber, the fluid inlet and the fluid outlet respectively communicating with the pump chamber, a volume of the pump chamber being changeable to draw a fluid into the pump chamber through the fluid inlet and discharge the fluid from the pump chamber through the fluid outlet, a portion of the pump chamber being formed of a flexible member, and a change in the volume of the pump chamber being achieved by deformation of the flexible member.

The liquid pump further includes: the motor rotating shaft of the motor is provided with a rotating wheel; the transmission mechanism is connected with the rotating wheel and the flexible component and converts the rotation of the rotating wheel into driving force for driving the flexible component to deform;

the middle cover is provided with a partial flow path from the fluid inlet to the pump chamber and a partial flow path from the pump chamber to the fluid outlet;

a sealing gasket is arranged between the upper cover and the middle cover;

be provided with a plurality of third buckle portions on the side surface of upper cover: and a plurality of fourth buckling parts are arranged on the side surface of the middle cover and are respectively buckled with the third buckling parts, so that the upper cover and the middle cover are pressed against the sealing gasket.

The liquid pump further includes: the motor, the motor shaft of motor is provided with runner, casing and drive mechanism. The transmission mechanism is connected with the rotating wheel and the flexible component, converts the rotation of the rotating wheel into driving force for driving the flexible component to deform, and the motor rotating shaft, the rotating wheel and the transmission mechanism are accommodated in the shell.

The liquid pump further comprises a rotating speed measuring device, and the rotating speed measuring device is arranged at the position, corresponding to the rotating wheel, on the outer side of the shell.

The position, corresponding to the rotating wheel, of the outer side of the shell is provided with a socket used for inserting the rotating speed measuring device, and one end, inserted into the socket, of the Hall sensor is provided with a first buckling part used for being clamped with a second buckling part in the inner surface of the socket to fix the rotating speed measuring device.

The Hall devices have many advantages, such as firm structure, small volume, light weight, long service life, convenient installation, low power consumption, high frequency (reaching IMHZ), vibration resistance, and resistance to pollution or corrosion caused by dust, oil stain, water vapor, salt mist and the like. The utility model discloses in, through set up hall sensor in the liquid pump, increase the magnetic pole on the runner, utilize the cooperation of hall sensor and magnetic pole to produce pulse signal. The pulse effect produced by the counter is counted by a counter to achieve a measure of the number of revolutions of the liquid pump. When the preset rotating wheel revolution reaches a set value, the power supply of the water pump motor is cut off, and the water pump stops working after the motor stops running so as to control the flow.

In order to obtain clearer pulse signals, the utility model discloses a bipolar latch hall sensor. It has higher anti-interference capability than a single-pole, non-latching sensor. If the S pole of the rotating wheel is close to the Hall sensor to generate high level, the magnetic field is kept away; when the N pole of the rotating wheel is close to the sensor, a low level is generated, the magnetic field is continuously kept after being removed, and the magnetic field is not changed until the next time, so that the accurate control of the flow can be realized by adopting the Hall sensor.

Additionally the utility model discloses in, be provided with a plurality of third buckle portions on the side surface of upper cover: and a plurality of fourth buckling parts are arranged on the side surface of the middle cover and are respectively clamped with the plurality of third buckling parts, so that the upper cover and the middle cover are pressed against the sealing gasket. In such a case, the problem that the gasket bulges due to the fact that the upper cover and the middle cover are fixed only by screws, and therefore sealing is not tight can be solved.

Furthermore, the utility model discloses in set hall sensor to socket structure and casing block, can conveniently fix hall sensor, can solve hall sensor's change and maintenance again, played the effect of killing two birds with one stone.

To sum up, in the embodiment of the utility model provides a solution pump photoelectric switch antipollution can be poor for the proposed scheme, and the liquid pump is sealed not tight, the difficult technical problem who changes of flow control device.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:

FIG. 1 is a cross-sectional view of an input fluid of a liquid pump according to an embodiment of the present invention;

FIG. 2 is a cross-sectional view of the output fluid of a liquid pump according to an embodiment of the present invention;

fig. 3 is an exploded view of a liquid pump configuration according to an embodiment of the present invention;

fig. 4 is an effect diagram of an upper cover buckle of a liquid pump according to an embodiment of the present invention;

fig. 5 is an exploded view of an upper cover fastening structure of a liquid pump according to an embodiment of the present invention;

fig. 6 is a detail view of a hall sensor fixing portion according to an embodiment of the present invention;

fig. 7 is a detail view of the hall sensor fixing part according to the embodiment of the present invention:

fig. 8 is a flow control device according to an embodiment of the present invention

Reference numerals:

1: a motor; 11: a motor shaft; 2: a housing; 21: a rotating wheel; 22: a magnetic pole; 23: a connecting rod; 24: a socket; 25: an impeller; 26: a transmission mechanism; 27: a second buckling part: 3: a water bag seat; 4: a flexible member: 41: d, dicing an umbrella; 42: pump chamber: 43: and (3) plugging: 5: a middle cover; 51: a third buckling part: 6: sealing gaskets; 7: an upper cover; 71: a fluid inlet; 72: a fluid outlet; 73: a fourth buckling part: 74: a through hole; 8: a screw; 9: a Hall sensor; 91: a first buckling part: 101: a controller; 102: counter with a memory

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

Unless specifically stated otherwise, the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present invention. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters indicate like items in the F-plane of the drawings, and thus, once an item is defined in one drawing, further discussion of it is not necessary in subsequent drawings.

Examples

Referring to the drawings of the embodiment of the present invention, shown in fig. 1-2, the present invention provides a liquid pump, including: a fluid inlet 71, a fluid outlet 72, and a pump chamber 42. Fluid inlet 71 and fluid outlet 72 are in communication with pump chamber 42, respectively, and the volume of pump chamber 42 is variable to draw fluid into pump chamber 42 through fluid inlet 71 and expel fluid from pump chamber 42 through fluid outlet 72. A part of the pump chamber 42 is formed by the flexible member 4, and the change in volume of the pump chamber 42 is achieved by deformation of the flexible member 4.

The liquid pump further includes: motor 1, motor 1's motor shaft 11 is provided with runner 21: and a transmission mechanism 26 (see reference numerals 23 and 25) connected to the runner 21 and the flexible member 4 and converting the rotation of the runner 21 into a driving force that drives the flexible member to be deformed.

The runner 21 is provided with magnetic poles 22 of different polarities: and the liquid pump further comprises a hall sensor 9 configured to generate a pulse signal related to the rotational speed of the motor 1 by sensing the magnetic poles 22 of different polarities.

The utility model discloses in, the liquid pump produces volumetric change with the deformation of flexible component 4, and arouses the atmospheric pressure change in the pump chamber 42 to can let the liquid pump can inhale and export liquid. The flexible member 4 moves downward, the volume increases, the instantaneous air pressure decreases, and the external liquid is sucked into the pump chamber 42 through the fluid inlet 71 under the action of the pressure difference; the flexible member 4 moves upward, squeezing the liquid in the pump chamber 42 outwardly through the fluid outlet 72. The flexible member 4 is periodically moved up and down by the continuous operation of the motor, thereby causing the pump to continuously suck and discharge liquid.

The motor 1 in the liquid pump generates circular motion, and the motor shaft 11 drives the rotating wheel 21 to rotate. The wheel 21 is connected to the flexible part 4 via a transmission 26, and the rotational movement of the wheel 21 is converted into a periodic deformation of the flexible part 4 via the transmission 26.

The umbrella ribs 41, the plugs 43 and the middle cover 5 are combined into two one-way valves to realize the one-way opening and closing function. When the flexible component 4 moves downwards, the umbrella nut 41 is opened, the plug 43 is closed, and outside liquid flows into the pump body; when the flexible part 4 moves upwards, the umbrella rib 41 is closed, and the plug 43 is opened, so that the liquid is discharged out of the pump body.

In order to be able to accurately control the flow rate of the liquid pump, an accurate measurement of the flow rate is necessary. The embodiment of the present invention provides a hall sensor 9 on the basis of the existing liquid pump, and the magnetic poles 22 (including N pole and S pole) with different polarities are provided on the runner 21, and the runner 21 rotates to drive the rotation of the magnetic poles 22. Due to the change of polarity, the hall sensor 9 senses different pulses, so that the hall sensor 9 generates a pulse signal of one period every time the runner 21 passes through the alternation of the N-pole and S-pole magnetic poles. According to the number of the pulse signals, the rotating speed of the motor 1 can be calculated, and further the fluid flow can be obtained. Thereby solving the problems related to flow measurement that need to be solved for accurately controlling the flow of the fluid.

Moreover, the hall sensor 9 has the advantages of firm structure, small volume, light weight, long service life, convenient installation, low power consumption, high frequency (reaching IMHZ), vibration resistance, and resistance to pollution or corrosion of dust, oil stain, water vapor, salt mist and the like. On the basis of controlling the fluid flow, the problem of poor anti-pollution capability of the traditional photoelectric switch is solved, so that the fluid application range of the liquid pump is increased.

Optionally, the liquid pump further comprises a housing 2. Wherein, the motor shaft 11, the rotating wheel 21 and the transmission mechanism 26 are accommodated in the housing 2, wherein the hall sensor 9 is disposed at a position corresponding to the rotating wheel 21 outside the housing 2.

Referring to the embodiment of the present invention shown in fig. 3, the hall sensor 9 is disposed outside the casing 2 of the liquid pump, and corresponds to the runner 21, so that the hall sensor 9 can sense the magnetic pole 22. Therefore, pulse signals can be generated, the counting is further convenient through the number of the pulse signals, and the purpose of quantity control is achieved. Furthermore, the hall sensor 9 is disposed outside the housing, so that the hall sensor 9 can be easily removed and maintained or replaced. The problem of traditional flow control device set up inconvenient dismantlement in the liquid pump body is solved.

Referring to fig. 6-7, optionally, a socket 24 for inserting the hall sensor 9 is provided at a position outside the housing 2 corresponding to the runner 21.

The socket 24 can further fix the hall sensor 9 on the liquid pump, and also facilitates the dismounting of the hall sensor 9.

Optionally, one end of the hall sensor 9 inserted into the socket 24 is provided with a first latching portion 91 for latching with a second latching portion 27 in the inner surface of the socket 24 to fix the hall sensor 9. Therefore, the socket 24 and the housing 2 can be fixed in a clamping manner by arranging the clamping part, so that the fixation can be ensured firmly.

Referring to fig. 3, the transmission mechanism 26 may alternatively include a connecting rod 23 and an impeller 25, wherein one end of the connecting rod 23 is inserted into an eccentric hole formed on the runner 21, and the other end of the connecting rod 23 is inserted into a mounting hole formed on a side of the impeller 25 facing the runner 21; and the impeller 25 is connected to the flexible member 4.

Specifically, the motor 1 in the liquid pump generates a circular motion, and the motor shaft 11 rotates the rotary wheel 21. The wheel 21 is connected to the flexible member 4 by a transmission 26. The connecting rod 23 in the transmission mechanism 26 is in clearance fit with the eccentric hole of the rotating wheel 21, meanwhile, the connecting rod 23 is in interference fit with the mounting hole of the impeller 25, and due to eccentricity, the rotating motion of the rotating wheel 21 is converted into the vertical reciprocating motion of the impeller 25 through the transmission mechanism 26, so that the flexible part 4 is driven to move vertically, and the deformation of the flexible part 4 is caused. Therein, FIG. 1 shows a schematic view of the flexible member 4 being driven to draw fluid into the pump chamber 42. Figure 2 shows a schematic view of the flexible member 4 being actuated to expel fluid from the pump chamber 42.

Alternatively, the flexible member 4 may be a cup or other member suitable for deformation.

Optionally, referring to FIG. 8, the liquid pump further includes a controller 101 and a counter 102. The counter 102 is connected in communication with the hall sensor 9, and the counter 102 is configured to count the pulse signals generated by the hall sensor 9: the controller 101 is in communication with the counter 102, and the controller 101 is in communication with the motor 1.

Specifically, when the hall sensor 9 generates a pulse signal, the counter 102 counts the pulse signal, thereby transmitting the count result to the controller 101. When a predetermined fluid flow rate is reached, the controller 101 controls the motor 1 to stop rotating, thereby achieving an effect of accurately controlling the flow rate.

Referring to fig. 4, the liquid pump optionally further comprises an upper cover 7 and a middle cover 5. The upper cover 7 is provided with a fluid inlet 71 and a fluid outlet 72. The intermediate lid 5 is provided with a partial flow path from the fluid inlet 71 to the pump chamber 42 and a partial flow path from the pump chamber 42 to the fluid outlet 72. A sealing gasket 6 is arranged between the upper cover 7 and the middle cover 5. A plurality of third locking parts 73 are provided on the side surface of the upper cover 7, and a plurality of fourth locking parts 51 are provided on the side surface of the middle cover 5, and are respectively locked with the plurality of third locking parts 73, so that the upper cover 7 and the middle cover 5 press the sealing gasket 6. As described above, the conventional micro-fluid pump is fixed between the upper cover and the middle cover by only three screws, so that the gasket between the upper cover and the middle cover is easily bulged, resulting in poor sealing of the fluid pump. The utility model discloses except adopting the screw, still set up third buckle portion 73 on upper cover 7, set up fourth buckle portion 51 on well lid 5 to make joint that upper cover 7, well lid 5 and gasket 6 can be inseparable together through buckle portion. Thereby the technical problem that the sealing between the upper cover and the middle cover is not tight in the prior art is solved.

Referring to fig. 4 to 5, optionally, the upper surfaces of the upper cover 7 and the middle cover 5 are provided with a plurality of through

holes

74 and 52 along the circumference, respectively, for connecting the upper cover 7 and the middle cover 5 together by means of screws 8. The third engaging portion 73 is disposed along the periphery of the upper cover 7 at a position different from the position of the through hole 74 of the upper cover 7.

Specifically, the screw 8, the third buckling part 73 and the fourth buckling part 51 are all used for tightly connecting the upper cover 7, the middle cover 5 and the gasket 6 together. But the through-hole is provided at a position different from the third catching portion 73 so that the catching portion is provided at a position between the screws to prevent the washer at the position between the screws from being swollen so that the washer is further kept flat.

Optionally, the hall sensor 9 is a bipolar latching hall sensor. Of course, other kinds of hall sensors are possible.

Through the scheme disclosed by the embodiment, the technical problems that the anti-pollution capacity of a liquid pump photoelectric switch is poor, the liquid pump is not tight in sealing and the flow control device is not easy to replace are solved through the arrangement of the Hall sensor 9 and the buckle structure.

In addition, although the present embodiment provides an improved solution including the hall sensor 9 and providing the snap-in portions for fixing in the upper cover and the middle cover. However, as an improvement to the prior art, if only the upper cover 7 and the middle cover 5 are sealed, the present invention also protects a liquid pump in which only the upper cover 7 and the middle cover 5 are provided with a snap-fit portion.

That is, according to another aspect of the present embodiment, there is provided a liquid pump including: a fluid inlet 71, a fluid outlet 72, and a pump chamber 42. The fluid inlet 71 and the fluid outlet 72 are respectively communicated with the pump chamber 42. The volume of the pump chamber 42 can be varied to draw fluid into the pump chamber 42 through the fluid inlet 71 and expel fluid from the pump chamber 42 through the fluid outlet 72. A part of the pump chamber 42 is formed by the flexible member 4, and the change in volume of the pump chamber 42 is achieved by deformation of the flexible member 4. The liquid pump further includes: motor 1, motor 1's motor shaft 11 is provided with runner 21: and a transmission mechanism 26 connected to the runner 21 and the flexible member 4 and converting the rotation of the runner 21 into a driving force for driving the flexible member to deform. And, the liquid pump further comprises an upper cover 7 and a middle cover 5, wherein the upper cover 7 is provided with the fluid inlet 71 and the fluid outlet 72: the middle cover 5 is provided with a partial flow path from the fluid inlet 71 to the pump chamber 42 and a partial flow path from the pump chamber 42 to the fluid outlet 72; a sealing gasket 6 is arranged between the upper cover 7 and the middle cover 5: a plurality of third catching portions 73 are provided on a side surface of the upper cover 7: and a plurality of fourth buckling parts 51 are arranged on the side surface of the middle cover 5 and are respectively buckled with the plurality of third buckling parts 73, so that the sealing gasket 6 is pressed by the upper cover 7 and the middle cover 5.

Furthermore, as an improvement over the prior art, if only how to fix the rotational speed measuring device to the liquid pump better is considered. The utility model discloses also protect an utilize the fixed rotational speed measuring device's of

buckle portion

91 and 27 technical scheme, and rotational speed measuring device can be hall sensor 9, certainly also can be other sensors, as long as use the fixed rotational speed measuring device that is used for of description in this embodiment to fix rotational speed measuring device, can realize firmly fixing rotational speed measuring device's technological effect.

That is, as another aspect of the present embodiment, there is provided a liquid pump including: a fluid inlet 71, a fluid outlet 72, and a pump chamber 42. Fluid inlet 71 and fluid outlet 72 are in communication with pump chamber 42, respectively, and the volume of pump chamber 42 is variable to draw fluid into pump chamber 42 through fluid inlet 71 and expel fluid from pump chamber 42 through fluid outlet 72. A part of the pump chamber 42 is formed by the flexible member 4, and the change in volume of the pump chamber 42 is achieved by deformation of the flexible member 4. The liquid pump further includes: motor 1, motor 1's motor shaft 11 is provided with runner 21: a housing 2; and a transmission mechanism 26 connected to the runner 21 and the flexible member 4, for converting the rotation of the runner 21 into a driving force for driving the flexible member to deform. And the motor shaft 11, the runner 21, and the transmission mechanism 26 are accommodated in the housing 2. The liquid pump further comprises a rotation speed measuring device 9, wherein the rotation speed measuring device 9 is arranged at a position, corresponding to the rotating wheel 21, outside the housing 2. A socket 24 for inserting the rotation speed measuring device 9 is arranged at a position, corresponding to the rotating wheel 21, on the outer side of the shell 2, and a first buckling part 91 is arranged at one end, inserted into the socket 24, of the rotation speed measuring device 9 and used for being buckled with a second buckling part 27 in the inner surface of the socket 24 to fix the rotation speed measuring device 9.

Thus, according to the technical scheme of the utility model, can utilize hall sensor 9 to measure the flow of liquid pump more accurately, can fix rotational speed measuring device better with the liquid pump through socket 24 and buckle part 91. And, set up buckle portion through upper cover and well lid for the gasket between upper cover and the well lid is more level and smooth, thereby makes the leakproofness of liquid pump better.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the orientation words such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, and in the case of not making a contrary explanation, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be interpreted as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

Spatially relative terms, such as "over", "above", "on", "upper surface", "over", and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above" may include both an orientation of "above" and "below". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and if not stated otherwise, the terms have no special meaning, and therefore, the scope of the present invention should not be construed as being limited.

In addition, the above-mentioned serial numbers of the embodiments of the present application are merely for description, and do not represent the merits of the embodiments. In the above embodiments of the present application, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the present invention, but is susceptible to various modifications and changes by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A liquid pump, comprising: a fluid inlet (71), a fluid outlet (72), and a pump chamber (42), the fluid inlet (71) and the fluid outlet (72) being respectively communicated with the pump chamber (42), a volume of the pump chamber (42) being changeable so as to suck a fluid into the pump chamber (42) through the fluid inlet (71) and discharge the fluid from the pump chamber (42) through the fluid outlet (72), a portion of the pump chamber (42) being formed of a flexible member (4), and a change in the volume of the pump chamber (42) being achieved by deformation of the flexible member (4),

the liquid pump further includes: the motor comprises a motor (1), wherein a motor rotating shaft (11) of the motor (1) is provided with a rotating wheel (21); and a transmission mechanism (26) connected to the runner (21) and the flexible member (4) and converting the rotation of the runner (21) into a driving force that drives the flexible member (4) to deform, characterized in that:

the rotating wheel (21) is provided with magnetic poles (22) with different polarities; and

the liquid pump further comprises a Hall sensor (9) configured to generate a pulse signal matched to the rotational speed of the motor (1) by sensing the magnetic poles (22) of different polarities.

2. A liquid pump according to claim 1, characterized in that the liquid pump further comprises a housing (2), the motor shaft (11), the rotor (21) and the transmission (26) being accommodated in the housing (2), wherein

The Hall sensor (9) is arranged at the position, corresponding to the rotating wheel (21), of the outer side of the shell (2).

3. A liquid pump according to claim 2, characterised in that a socket (24) for inserting the Hall sensor (9) is provided outside the housing (2) at a location corresponding to the runner (21).

4. A liquid pump according to claim 3, characterised in that the end of the hall sensor (9) inserted into the socket (24) is provided with a first catch (91) for engaging with a second catch (27) in the inner surface of the socket (24) to secure the hall sensor (9).

5. A liquid pump according to claim 1, characterised in that the flexible member (4) is a cup.

6. A liquid pump according to claim 1, further comprising a controller (101) and a counter (102), wherein,

the counter (102) is connected with the Hall sensor (9) in a communication way, and the counter (102) is configured to count pulse signals generated by the Hall sensor (9):

the controller (101) is in communication connection with the counter (102); and is

The controller (101) is in communication connection with the motor (1).

7. A liquid pump according to claim 1, further comprising an upper cover (7) and a middle cover (5), wherein

The upper cover (7) is provided with the fluid inlet (71) and the fluid outlet (72);

the middle cover (5) is provided with a partial flow path from the fluid inlet (71) to the pump chamber (42) and a partial flow path from the pump chamber (42) to the fluid outlet (72);

a sealing gasket (6) is arranged between the upper cover (7) and the middle cover (5);

a plurality of fourth buckling parts (73) are arranged on the side surface of the upper cover (7); and

a plurality of third buckling parts (51) are arranged on the side surface of the middle cover (5) and are respectively buckled with the fourth buckling parts (73), so that the sealing gasket (6) is pressed by the upper cover (7) and the middle cover (5).

8. A liquid pump according to claim 7, wherein the upper cover (7) and the upper surface of the middle cover (5) are each provided with a plurality of through holes (74, 52) along the periphery for connecting the upper cover (7) and the middle cover (5) together by means of screws (8),

wherein the third buckling part (51) is arranged at a position along the periphery of the upper cover (7) different from the position of the through hole of the upper cover (7).

9. A liquid pump, comprising: a fluid inlet (71), a fluid outlet (72), and a pump chamber (42), the fluid inlet (71) and the fluid outlet (72) being respectively communicated with the pump chamber (42), a volume of the pump chamber (42) being changeable so as to suck a fluid into the pump chamber (42) through the fluid inlet (71) and discharge the fluid from the pump chamber (42) through the fluid outlet (72), a portion of the pump chamber (42) being formed of a flexible member (4), and a change in the volume of the pump chamber (42) being achieved by deformation of the flexible member (4),

the liquid pump further includes: the motor comprises a motor (1), wherein a motor rotating shaft (11) of the motor (1) is provided with a rotating wheel (21); and a transmission mechanism (26) connected to the runner (21) and the flexible member (4) and converting the rotation of the runner (21) into a driving force that drives the flexible member (4) to deform,

the liquid pump further comprises an upper cover (7) and a middle cover (5), wherein

10. A liquid pump, comprising: a fluid inlet (71), a fluid outlet (72), and a pump chamber (42), the fluid inlet (71) and the fluid outlet (72) being respectively communicated with the pump chamber (42), a volume of the pump chamber (42) being changeable so as to suck a fluid into the pump chamber (42) through the fluid inlet (71) and discharge the fluid from the pump chamber (42) through the fluid outlet (72), a portion of the pump chamber (42) being formed of a flexible member (4), and a change in the volume of the pump chamber (42) being achieved by deformation of the flexible member (4),

the liquid pump further includes: the motor comprises a motor (1), wherein a motor rotating shaft (11) of the motor (1) is provided with a rotating wheel (21); a housing (2); and a transmission mechanism (26) connected to the rotary wheel (21) and the flexible member (4) to convert the rotation of the rotary wheel (21) into a driving force for driving the flexible member (4) to deform, and the motor rotary shaft (11), the rotary wheel (21), and the transmission mechanism (26) are accommodated in the housing (2), characterized in that,

the liquid pump further comprises a rotating speed measuring device which is arranged at the position on the outer side of the shell (2) corresponding to the rotating wheel (21),

the position department that the casing (2) outside with runner (21) corresponds is provided with and is used for inserting rotational speed measuring device's socket (24), the rotational speed measuring device inserts the one end of socket (24) is provided with first buckle portion (91), be used for with second buckle portion (27) joint in socket (24) internal surface, it is fixed rotational speed measuring device.