CN116498571A - Submersible pump capable of accurately detecting water level - Google Patents

Abstract

A submersible pump capable of ensuring that drinking water of pets is sufficiently sterilized and disinfected and capable of controlling the starting and stopping of a water pump in a fully intelligent manner and accurately detecting the water level. The impeller pump comprises an impeller pump and a water level sensing piece, wherein the working state of the impeller pump is determined by a main control circuit through collecting the impeller rotating speed of the impeller pump and the capacitance value of the water level sensing piece. The double detection mode is adopted to effectively judge whether the impeller pump of the submersible pump needs to operate, so that the problem that noise or damage is generated due to idling of the impeller pump under the condition that no water or little water exists in the water container is effectively solved, the problem that the impeller pump is automatically started when the water level of the impeller pump in the water container rises to a set height is solved, and misjudgment caused by water quality difference or the fact that the impeller is wrapped by foreign matters can be avoided. In addition, the additionally arranged water inlet guide plate can also play a role in carrying out efficient and full sterilization on flowing water flowing into the submerged pump and then conveying the flowing water, so that the problem of incomplete sterilization of water quality in a circulating system is solved, and the use of users is more environment-friendly, safer and more safe.

Description

Submersible pump capable of accurately detecting water level

Technical Field

The invention relates to a submersible pump, in particular to a small submersible pump placed in a pet drinking water tray.

Background

Nowadays, more and more people like to feed small animals, such as kittens, puppies and the like, and in order to drink water to these pets, a plurality of pet water trays or basins which are attractive in appearance and can provide flowing clean drinking water are designed for the relevant people.

Generally, such a water tray or basin comprises water storage chamber, outlet pipe and water conservancy diversion dish, has placed the immersible pump in the water storage chamber, and the immersible pump promotes the water purification in the water storage chamber through the pipeline in the outlet pipe of setting above the water conservancy diversion dish, and the outlet pipe goes out water and supplies pets to drink, falls into the water storage chamber by the outlet pipe and flows back again in the water conservancy diversion dish, so the circulation makes the drinking water be in flowing all the time, from this, can ensure that there is higher oxygen content in the drinking water.

Submersible pumps used in pet water trays or basins in the prior art generally detect the level of water in a water storage chamber (hereinafter referred to as a water container in other documents of the present application) by a capacitive sensor (hereinafter also referred to as a water level sensor). When the water level reaches the upper limit value of the water level (the water level corresponding to the normal operation of the submersible pump is started), the water level sensing piece outputs a low capacitance value to the main control circuit of the submersible pump, and the submersible pump is started to work at the moment; when the water level falls to the lower limit value of the water level (in order to avoid damage to the submersible pump caused by idle rotation of the submersible pump, the water level sensing piece outputs a high capacitance value corresponding to stop working of the submersible pump), at the moment, the submersible pump stops working, and meanwhile, water is injected into the water storage chamber through the external water supply device.

Although the above scheme can enable the submersible pump to be automatically opened or closed, the above scheme still has the following defects:

1. capacitive sensing is performed by a change in the medium outside the sensor, with different media causing the sensor strip to generate different capacitance change signals. If the water quality and the environment are relatively stable, the water pump can work stably in this way, but often in the use process, the water quality is determined according to the use environment and the habit of consumers and the use time is related, and many uncontrollable factors can lead to a large change range of the capacitance value of the sensing piece, so that misjudgment is carried out on the working mode of the water pump.

Among the most common are: when the medium of the same water pump and the same water level is purified water, mineral water, tap water or seawater respectively, the difference of signal output values generated by the sensors is large, for example, the water pump can work normally in the seawater, and the water pump can not work when put into the purified water.

2. If the outer wall of the sensor is wrapped by the article with the liquid floating, when the water level in the water storage chamber is reduced to the level at which the water should be stopped, the sensor may output a stop signal, thereby enabling the water pump to be in an idle state, generating high friction noise and being extremely easy to damage the water pump.

3. In addition, the submersible pump with the UV lamp in the prior art is exposed outside the submersible pump, and the UV lamp does not have a high-efficiency and sufficient sterilization effect on flowing water entering the submersible pump in an overcurrent mode.

Disclosure of Invention

The invention aims to solve the technical problem of providing the submersible pump capable of accurately detecting the water level, which can ensure that drinking water of pets is sufficiently sterilized and disinfected and can fully and intelligently control the starting and stopping of the water pump.

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

the invention relates to a submersible pump capable of accurately detecting water level, which is placed in a water container and comprises a shell, a water inlet arranged on the front end surface of the shell and an impeller pump arranged in the shell, and is characterized in that: the impeller pump is arranged on the right side of the bottom plate of the shell, and a water level sensing piece is arranged on the left side of the impeller pump in the shell; the working state of the impeller pump is determined by a main control circuit through collecting the impeller rotating speed of the impeller pump and the capacitance value of the water level sensing piece according to the following method:

1) After the submersible pump is electrified and automatically operates, if a main control circuit of the submersible pump monitors that the rotating speed of the impeller does not reach a diffuse wheel line state continuously rotating at a constant speed within a set time, the main control circuit enables the impeller pump to enter a standby state and instructs a water supply device arranged outside the submersible pump to fill water into a water container; the impeller pump is started to operate again after waiting for a set time under the condition that the capacitance value of the water level sensing sheet gradually changes from high to low, and when the impeller rotating speed is from high to low and the diffused impeller line state is maintained for a set delay time, the main control circuit takes the capacitance value of the water level sensing sheet which is collected immediately as a starting signal for the impeller pump which is in a standby state after the main control circuit is started to operate again;

or after the submersible pump is electrified and automatically operates the impeller pump every time, when the impeller rotating speed is from high to low in a specified time to the diffuse impeller line state and the delay time is maintained, the main control circuit takes the capacitance value of the water level sensing sheet collected immediately as a starting signal for the impeller pump in a standby state to operate again;

2) The impeller pump continuously operates, and when the capacitance value of the water level sensing piece gradually changes from low to high, the main control circuit sends out an instruction for stopping operation to the impeller pump when the rotating speed of the impeller rises to a set upper speed limit value from the rotating speed corresponding to the diffuse wheel state, the instruction is called a stop signal, and meanwhile, a signal for injecting water into the water container is sent out to the water supply device;

3) In the water supply process of the water supply device, when the capacitance value of the water level sensing sheet acquired by the main control circuit is the same as the capacitance value corresponding to the starting signal, a signal for restarting the impeller pump is sent;

4) The impeller pump continuously operates, when the impeller rotating speed collected by the main control circuit is increased to the rotating speed corresponding to the shutdown signal, a signal for stopping operation again is sent to the impeller pump, and meanwhile, the water supply device is instructed to fill water into the water container.

The inside of the shell is divided into a front cavity, a rear cavity and a rotor cavity, wherein the front cavity, the rear cavity and the rotor cavity are mutually sealed and isolated, the water inlet is communicated with the front cavity, an impeller of the impeller pump is arranged in an impeller chamber of the rotor cavity, the impeller chamber is isolated from the rotor chamber of the rotor cavity through a front bearing which is sealed by water, and a rotating shaft of a rotor assembly arranged in the rotor chamber is connected with the impeller through the front bearing; the water outlet of the submersible pump is arranged on the top plate of the shell and is communicated with the impeller chamber; the stator assembly of the impeller pump and the circuit board carrying the main control circuit are arranged in the rear cavity.

Be located be equipped with the UV lamp subassembly in the space that the impeller room left side was assigned to the back chamber, this UV lamp subassembly comprises printing opacity baffle, sealing washer subassembly, UV lamp and the lighting fixture that set gradually from front to back, is equipped with the light trap in the position that corresponds with the UV lamp subassembly on the front wall board in back chamber, printing opacity baffle sets up the rear side at the light trap, and the sealing washer subassembly is with light trap, printing opacity baffle and UV lamp water-tight isolation in proper order.

The shell comprises a front end cover, the water inlet hole is arranged on the front end cover, and a water inlet guide plate which can completely irradiate the water inlet sucked into the front cavity through the water inlet hole through the UV lamp and then flow into the impeller chamber is arranged in the shell and behind the front end cover.

The water inlet guide plate is of a multi-layer clamping plate structure and comprises a lamp cavity front baffle plate, a wheel cavity front baffle plate, a water guide groove, a front cavity formed behind the lamp cavity front baffle plate, a water flow channel between lamp wheels and a wheel sealing cavity plate arranged behind the wheel cavity front baffle plate; the front baffle plate of the lamp cavity is positioned in front of the light holes, and the front cavity is a gap through which water flows and is formed between the front baffle plate of the lamp cavity and the light holes; the water guide groove is arranged between the lamp cavity front baffle and the wheel cavity front baffle and is a vertical flow passage for guiding inflow water into the front cavity; the wheel sealing cavity plate is arranged at the rear side of the wheel cavity front baffle and is covered on the impeller chamber in a sealing way, the water flow channel between the lamp wheels is formed by a gap between the wheel sealing cavity plate and the wheel cavity front baffle and is communicated with the front cavity, and the wheel sealing cavity plate is provided with a water passing hole which enables the water flow channel between the lamp wheels to be communicated with the impeller chamber.

A wireless charging receiving plate is arranged on the bottom plate in the shell and positioned in a space belonging to the rear cavity below the rotor cavity.

And a wireless transmitting module which can supply power to the wireless charging receiving plate is arranged outside the shell opposite to the wireless charging receiving plate.

And the circuit board is provided with an LED indicator lamp for displaying whether the submersible pump is electrified.

The front end cover comprises a front cover buckled on the main body of the shell and a fence frame arranged in front of the front cover, filter cotton is filled in the fence frame, and a finger position convenient for replacing the filter cotton is arranged at the top edge of the front side frame of the fence frame.

The stator assembly comprises a positioning bracket, an upper stator winding and a lower stator winding which are arranged in a separated mode, the positioning bracket is arranged in the left side space of the rear cavity, the upper stator winding and the lower stator winding are wrapped on the peripheral wall of the rotor cavity in a relatively arranged mode, and the rotor assembly arranged in the rotor cavity is arranged in a magnetic field generated by the stator winding.

The submersible pump adopts a double detection mode to effectively judge whether the impeller pump of the submersible pump needs to operate or not. The automatic starting device can not only effectively solve the problem that the impeller pump generates noise or is damaged due to idling of the impeller pump under the condition that no water or little water exists in the water container, but also solve the problem that the impeller pump is started automatically when the water level in the water container rises to a set height. The method can avoid misjudgment caused by water quality difference or the fact that the impeller is wrapped by foreign matters. In addition, the water inlet guide plate additionally arranged in the invention can also play a role in carrying out efficient and full sterilization on flowing water flowing into the submerged pump and then conveying the flowing water, so that the problem of incomplete sterilization of water quality in a circulating system is solved, and the use of users is more environment-friendly, safer and more safe.

Drawings

Fig. 1 is a schematic view of the submersible pump of the present invention.

Fig. 2 is a schematic view of fig. 1 with the front end cap removed.

Fig. 3 is a schematic view of the front end cover, the water inlet baffle and the housing body in fig. 1 after being detached.

Fig. 4 is an exploded view of the submersible pump of fig. 1.

Fig. 5 is a cross-sectional view taken along the direction A-A in fig. 1.

Fig. 6 is a sectional view taken along the direction B-B in fig. 1.

Fig. 7 is a schematic view of the intake baffle of fig. 2.

Fig. 8 is a rear view of the intake baffle of fig. 7.

Fig. 9 is a schematic view of the water inlet baffle of fig. 7 after being placed flat in the paper direction.

FIG. 10 is a schematic view of the intake baffle of FIG. 8 with a broken line of flow channels between the lamp wheels.

FIG. 11 is a schematic view of the flow direction of the water flowing from the lamp lighting cavity to the water flowing channel between the lamp wheels.

The reference numerals are as follows:

the housing 1, front end cover 11, front cover 12, fence frame 13, filter cotton 14, finger position 15, water inlet hole 16, main body 2, front cavity 21, rear cavity 22, circuit board 23, wireless charging module 24, rotor cavity 25, impeller chamber 251, rotor chamber 252, UV lamp assembly 3, light transmissive partition 31, seal ring assembly 32, UV lamp 33, lamp holder 34, light inlet hole 35, mounting position 36, water inlet deflector 4, lamp cavity front baffle 41, wheel cavity front baffle 42, water guide groove 43, groove wall plate 431, inter-lamp-wheel water flow channel 44, wheel sealing cavity plate 45, water inlet hole 46, annular seal ring 47, surrounding wall plate 48, water outlet hole 5, rear cover 6, small transparent area 61, LED indicator lamp 62, impeller pump 7, impeller 71, stator assembly 72, positioning bracket 721, upper stator winding 722, lower stator winding 723, rotor assembly 73, rotation shaft 731, front bearing 732, rear bearing 733, rear bearing sleeve 734, rotor 735, water level sensor 8, submersible pump 9.

Detailed Description

The submersible pump 9 capable of accurately detecting the water level is a small direct current pump placed in the water storage of the water container, is particularly applied to the pet water fountain with the existing appearance like artware, and the water storage can be purified water, tap water or mineral water. The submerged pump 9 has the function of lifting and pumping water in the water container so that a pet can drink the water easily, and simultaneously, the water storage is promoted to be circulated continuously so as to ensure that the water has higher oxygen content.

The submerged pump 9 is submerged in the water container of the pet water dispenser, and after each power-on (after the pet water dispenser is turned off for the previous time, the power supply of the submerged pump 9 is turned on again), the main control circuit of the submerged pump 9 can automatically judge the water level in the water container according to a dual-mode detection mode arranged in the submerged pump 9 and automatically send an opening or closing instruction to the impeller pump 7 of the submerged pump 9.

The dual-mode detection mode is judged by a main control circuit according to the respectively acquired rotating speed of the impeller 71 of the impeller pump 7 and the capacitance value of the water level sensor 8 arranged in the water container, and has the advantages that:

1) The main control circuit is prevented from generating misjudgment on the water level in the water container due to water quality change, which is easy to occur only when the water level sensor 8 is used.

Only the water level sensor 8 is adopted for detection, and the defects are that: since the capacitive detection is based on the change of the medium outside the water level sensor 8 (TD refers to the change of the value of TD in the medium, and TD refers to the concentration of ions in water), the capacitance of the sensing plate inside the water level sensor 8 is changed to output an electrical signal. If the water quality and the environment (i.e. if fungus grows or attachments exist on the outer surface of the water level sensing piece, the capacitance sensing value is affected by the environmental difference) are relatively stable, the submersible pump 9 works relatively stably by adopting the detection mode, but often in the use process, the water quality is related to the habit of consumers and the use time, and a plurality of uncontrollable factors lead to larger variation range of the capacitance value of the sensing piece, so that misjudgment is generated on the water level height in the water container, and the submersible pump 9 is very easy to work under the submersible environment.

For example, when the water medium is purified water, mineral water, tap water or seawater, the difference between the relevant signal values detected by the water level sensor 8 is very large. In addition, when the water level in the water container is lowered to a level at which the operation should be stopped (the impeller pump 7 of the submersible pump 9 is prevented from being exposed to the outside and idling due to the lowering of the water level), erroneous detection judgment may occur because the outer wall of the water level sensor 8 is wrapped by an article with liquid floating, so that the submersible pump 9 cannot operate in a submerged state and the impeller pump 7 idles to generate noise or cause damage.

2) The main control circuit is prevented from generating the defect that the main control circuit cannot be started automatically only when the water level of the submersible pump 9 with the rotation speed detection protection device, which is used for preventing the impeller 71 from rotating empty, in the water container rises to a normal state.

Only the submersible pump 9 with a rotation speed detection device is adopted for detection, and the defects are that: when the water level in the water container is lowered to the set level, the main control circuit of the submersible pump 9 detects that the rotation speed of the impeller 71 is raised to the set value, and then the main control circuit sends a command for stopping rotation to the impeller pump 7, at this time, new water is added into the water container, when the water level in the water container is raised to the level at which the impeller pump 7 can normally operate (namely, when the water level overflows the highest point of the impeller 71), the rotation speed detection device does not detect the water level, and at this time, manual intervention is needed or intermittent start is adopted to obtain a rotation speed signal after the impeller pump 7 is set to stop.

A set of manual opening circuit structure is needed to be configured by manual intervention (namely manual starting), and meanwhile, the circuit cannot be an intelligent product because the circuit cannot be opened intelligently.

The intermittent start mode is adopted, which can make the impeller pump 7 frequently turned on and off, can make the impeller pump 7 idle and generate noise when the water level does not reach the normal operation water level line, and can cause the submersible pump 9 to be damaged if the complete idle running is serious for a long time.

As shown in fig. 1 to 6, the submersible pump 9 of the present invention comprises a housing 1, an impeller pump 7 and a water level sensor 8 (also called a water level sensing sheet) provided in the housing 1, a UV lamp assembly 3 (also called an ultraviolet sterilization assembly) capable of completely sterilizing water entering the submersible pump 9, a water inlet deflector 4 guiding water to be irradiated through the UV lamp assembly 3 according to a set flow path and pumped out by the impeller pump 7, a main control circuit mounted on a circuit board 23 for controlling the operation or stop of the impeller pump 7, and a wireless charging module for increasing electric power for the main control circuit and the impeller pump 7.

1. Shell 1

Is assembled by a front end cover 11, a main body 2 and a rear cover 6.

1. Front end cover 11

The front end cover 11 comprises a front cover 12 which can be buckled on the front end face of the main body 2 of the shell 1 and a fence frame 13 (taking the paper direction of fig. 1 as an example, the left front is the front, the right back is the back, the left upper is the left, the right lower is the right, and the lower is the same), filter cotton 14 which can purify the water storage once is filled in the fence frame 13, and a finger position 15 which is convenient for replacing the filter cotton 14 is arranged on the top edge of the front side frame of the fence frame 13. The front cover 12 is provided with a water inlet hole 16 which can lead the water in the water container into the main body 2, and the water storage enters the main body 2 from the fence, the filter cotton 14 and the water inlet hole 16 in sequence.

2. Main body 2, impeller pump 7, water level sensor 8 and wireless charging module

The external shape is a cuboid, and a plurality of mutually isolated spaces are respectively formed in the cuboid, namely a front cavity 21, a rear cavity 22 and a rotor cavity 25.

1) Front cavity 21

The water entering the main body 2 through the water inlet hole 16 passes through a cavity which is positioned at the front side of the main body 2 and is deviated to the left.

2) Rear cavity 22

The UV lamp assembly 3, the stator assembly 72 of the vane pump 7, the circuit board 23 and the wireless charging receiving board of the wireless charging module are installed in the rear chamber 22 after the front chamber 21, and the rear chamber 22 is separated from the front chamber 21 and the rotor chamber 25 by water-sealing.

The water level sensor 8 is arranged at a left position in the rear cavity 22; the wireless charging receiving plate is mounted in a space on the inner surface of the bottom plate of the main body 2 belonging to the rear cavity 22.

The wireless transmitting module capable of supplying power to the wireless charging receiving plate is arranged below the bottom plate of the shell 1, is fixedly connected to the bottom plate of the shell 1 through a water sealing structure, and is charged through conventional electromagnetic coupling in the prior art. The operation mode is that the wireless transmitting module is immediately connected when the submersible pump 9 is powered on each time.

3) Rotor chamber 25

The vane pump 7 of the submersible pump 9 is mounted in the rotor chamber 25 to the right of the front chamber 21 and extends rearwardly to occupy a portion of the rear chamber 22 space.

The rotor cavity 25 is divided into an impeller chamber 251 and a rotor chamber 252 from front to back, an impeller 71 and a rotor assembly 73 of the impeller pump 7 are respectively arranged in the impeller chamber 251 and the rotor chamber 252, the impeller chamber 251 and the rotor chamber 252 are isolated by a water-tight front bearing 732, the front end of a rotating shaft 731 of the rotor assembly 73 passes through the front bearing 732 to be connected with the impeller 71, and a rear bearing 733 and a rear bearing sleeve 734 which can enable the rear end of the rotating shaft 731 to be arranged in the rear part of the rotor chamber 252 are arranged at the rear part of the rotor chamber 252. Sealing the impeller chamber 251 from the rotor chamber 252 effectively prevents impurities in water from entering the rotor chamber 252, prevents the rotor assembly 73 from being easily stuck by the impurities as in the prior art, and effectively improves the operational reliability of the impeller pump 7.

The impeller chamber 251 communicates with the front chamber 21 through a directional water flow passage provided on the intake baffle 4.

The stator assembly 72 includes a positioning bracket 721 and upper and lower stator windings 722 and 723 separately provided, the positioning bracket 721 being installed in a left side space of the rear chamber 22, the upper and lower stator windings 722 and 723 being wrapped around an outer peripheral wall of the rotor chamber 252 in an opposite arrangement, the rotor assembly 73 installed in the rotor chamber 252 being placed in a magnetic field generated by the stator windings.

The upper stator winding 722 and the lower stator winding 723 are respectively electrically connected with the main control circuit, and are electrified and generate a magnetic field under the control of the main control circuit, and the rotor assembly 73 with the permanent magnets rotates under the action of the magnetic field and drives the impeller 71 to rotate so that water in the impeller chamber 251 is sprayed out through the water outlet hole 5 arranged on the top plate of the main body 2.

3. Rear cover 6

The back cover 6 is provided with a small transparent area 61 which can transmit light generated by the LED indicator lamp inserted on the circuit board 23 out of the back cover 6, and the arrangement has the advantages that: the indicator light is not exposed, and the appearance is clean and convenient to install.

The LED indicator lamp has the functions of:

when the impeller pump 7 is shut down, the indicator light is turned on red while the UV lamp 33 of the UV lamp assembly 3 is turned off. When water is injected into the water container and the water level rises to the level that the impeller pump 7 can normally operate, the indicator light turns from red to green, and the UV lamp 33 is lightened; the indicator light is red and blinks when water is absent.

2. UV lamp assembly 3

The UV lamp assembly 3 is disposed in a space left of the impeller chamber 251 and assigned to the rear chamber 22, and is composed of a light-transmitting partition 31, a sealing ring assembly 32, a UV lamp 33 and a lamp holder 34, which are sequentially disposed from front to rear.

A light hole 35 is formed in a front wall plate of the rear chamber 22 (the front wall plate separates the front chamber 21 from the rear chamber 22), a mounting position 36 for mounting the light-transmitting partition plate 31 is formed on the rear side surface of the front wall plate and located on the periphery of the light hole 35 (the area of the light-transmitting partition plate 31 is larger than that of the light hole 35 and is blocked on the light hole 35), and a sealing ring assembly 32 for preventing water in the front chamber 21 from entering the rear chamber 22 through the light hole 35 is arranged on the mounting position 36.

The lamp holder 34 is arranged behind the light-transmitting partition plate 31, and the VU lamp is arranged on the lamp holder 34 and is electrically connected with the main control circuit.

When the running water entering the main body 2 through the water inlet hole 16 flows into the front cavity 21 before the light-transmitting partition plate 31, the ultraviolet light generated by the UV lamp 33 irradiates the running water sufficiently through the light-transmitting partition plate 31.

3. Inlet water deflector 4

The function of this is to pass the water entering the main body 2 through the inlet hole 16 through the front chamber 21 which is irradiated by the UV lamp 33, and then enter the impeller chamber 251 of the rotor chamber 25 according to the set water passage. Which is mounted inside the housing 1 before the UV lamp assembly 3 and the rotor assembly 73.

As shown in fig. 7-11, the inlet baffle 4 of the present invention is preferably an integrally formed multi-layered splint structure. It comprises a front lamp chamber baffle 41, a front wheel chamber baffle 42, a water guide groove 43, the front chamber 21 (also called a lamp chamber) formed behind the front lamp chamber baffle 41, a water flow channel 44 between the lamp wheels (namely the directional water flow channel) and a rear wheel sealing chamber plate 45.

1. Lamp chamber front baffle 41, wheel chamber front baffle 42, and water guide groove 43

The lamp cavity front baffle 41 and the wheel cavity front baffle 42 are arranged on the same plane and are separated from each other, the lamp cavity front baffle 41 is perpendicular to the bottom plate surface of the main body 2, the lamp cavity front baffle 41 is opposite to the UV lamp assembly 3 (i.e. the lamp cavity front baffle 41 is positioned in front of the light holes 35), the wheel cavity front baffle 42 is opposite to the rotor assembly 73, and the two plates are arranged to prevent water sucked into the main body 2 by the water inlet holes 16 from directly entering the impeller chamber 251.

The peripheral wall plates 48 extending rearward are provided on part of the peripheral edges of the lamp chamber front baffle plate 41 and the wheel chamber front baffle plate 42, respectively, and the peripheral wall plates 48 of the lamp chamber front baffle plate 41, the space between the inner side surface and the front wall plate of the rear chamber 22 constitute the front chamber 21.

The water guiding groove 43 is vertically arranged and is arranged between the lamp cavity front baffle 41 and the wheel cavity front baffle 42, the height of the upper edge of the groove wall plate 431 connected with the lamp cavity front baffle 41 on the water guiding groove 43 is slightly lower than the height of the lamp cavity front baffle 41, the flowing water sucked into the main body 2 spreads upwards in front of the water inlet guide plate 4 and flows into the front cavity 21 through the top edge of the groove wall plate 431 connected with the lamp cavity front baffle 41 on the water guiding groove 43, and the flowing water entering the front cavity 21 enters the impeller chamber 251 through the water flow channel 44 between the lamp wheels after being irradiated by the UV lamp 33 (the front cavity 21 forms a special cavity for fully and efficiently sterilizing the flowing water entering the front cavity).

2. Water flow channel 44 between lamp wheels and wheel sealing cavity plate 45

The wheel cavity sealing plate 45 is arranged in front-rear opposite to the wheel cavity front baffle 42 and is spaced front-rear therebetween. The wheel sealing cavity plate 45 is rectangular, when the water inlet guide plate 4 is assembled on the main body 2, the wheel sealing cavity plate 45 covers the front end face of the impeller chamber 251, and an annular sealing rubber ring 47 for preventing water inlet from penetrating into the impeller chamber 251 from the periphery of the wheel sealing cavity plate 45 is further arranged on the inner side face of the wheel sealing cavity plate 45, and the outer diameter of the annular sealing rubber ring 47 is slightly larger than the inner diameter of the impeller chamber 251.

The inter-lamp-wheel water flow channel 44 is formed by a groove wall plate 431 of the diversion groove, a wheel sealing cavity plate 45 and a wheel cavity front baffle plate 42, and is positioned in the lower area inside the water inlet diversion plate 4, and the inter-lamp-wheel water flow channel 44 is communicated with the front cavity 21.

The wheel sealing chamber plate 45 is provided with a water passing hole 46 for communicating the lamp-to-wheel water flow passage 44 with the impeller chamber 251, that is, water flowing from the front chamber 21 through the lamp-to-wheel water flow passage 44 enters the impeller chamber 251 through the water passing hole 46.

4. The working state of the impeller pump 7 is determined by a main control circuit through collecting the rotating speed of the impeller 71 of the impeller pump 7 and the capacitance value of the water level sensing piece according to the following method:

1. after each power-up of the submersible pump 9 and automatic operation of the vane pump 7, whether the vane pump 7 is on standby or continuously operated, there are the following two determination methods:

1) If the main control circuit of the submersible pump 9 detects that the rotational speed of the impeller 71 does not reach the diffuse wheel line state in which the rotation continues at a constant speed within a predetermined time (two cases are not almost reached: firstly, the water container has no water or less water, and the rotating speed is higher than the normal rotating speed of the impeller pump 7; and secondly, when the impeller 71 is wound by certain sundries, the rotating speed of the impeller 71 is lower than the normal rotating speed, and the main control circuit enables the impeller pump 7 to enter a standby state and instructs a water supply device arranged outside the submersible pump 9 to fill water into the water container.

Then, the impeller pump 7 is restarted after the capacitance value of the water level sensing plate gradually changes from high to low (meaning that the water level is continuously rising), when the rotation speed of the impeller 71 reaches the rotation speed corresponding to the diffuse rotation state and maintains the set delay time, the impeller pump 7 is not stopped, and at this time, the master control circuit takes the capacitance value of the water level sensing plate collected immediately as a starting signal for restarting the impeller pump 7 in a standby state.

The purpose of the time delay time is to make the water level in the water container slightly higher than the diffuse wheel line, and the specific height is determined according to the rising rate of the water level when the water supply device fills water into the water container. Because of too high, the water storage pets in the water container can not drink completely for a long time, and bacteria or larvae can be easily bred after the water storage pets are stored for a long time; too low, the vane pump 7 may be repeatedly turned on or off. Namely, when more pets are present, the single water consumption is large, the difference value that the actual water level is higher than the diffuse wheel line is larger, and otherwise, the difference value is smaller.

Note that:

continuous constant speed: indicating the rotational speed of the impeller 71 corresponding to the water level in the water container just after it has passed the highest point of the impeller 71 of the impeller pump 7. Because the impeller 71 is completely immersed in water at this time, the resistance to water to which the impeller 71 is subjected when rotated in water is constant.

The diffuse wheel line state refers to: the water line corresponding to the highest point of the impeller 71 at which the impeller 71 is at a constant speed is referred to as a diffuse line, and the rotational speed state of the impeller 71 when the water level is at the diffuse line is referred to as a diffuse line state, that is, it means that the impeller pump 7 is not in an idling state.

Duration of: the rate of change of the influence of the water level rising speed on the rotation speed of the impeller 71 is determined, for example, if the water level rising speed is high, the duration time can be set short, and if the water level rising speed is low, the duration time can be set long.

The specified time is as follows: the time is set according to a limit conservation time when the vane pump 7 rotates empty without damage, and can be a second time or a minute time.

The machine setting time is as follows: according to the volume of the water container and the water supply flow rate of the water supply device in unit time.

2) When the rotation speed of the impeller 71 reaches the state of the diffuse wheel line within the prescribed time and maintains the delay time, the impeller pump 7 is not stopped, and at this time, the main control circuit takes the capacitance value of the water level sensing piece collected immediately as a starting signal for the impeller pump 7 in a standby state to be operated again.

2. When the capacitance value of the water level sensing piece is gradually changed from low to high (the shallow water capacitance value is high and the full water capacitance value is low), the main control circuit sends out a command of stopping operation to the impeller pump 7 when the rotating speed of the impeller 71 is increased to a set upper speed limit value from the rotating speed corresponding to the diffuse wheel line state, and simultaneously sends out a signal of filling water into the water container to the water supply device.

The main control circuit sets the set upper limit value of the speed as a stop signal for the impeller pump 7 to be on standby.

3. In the water supply process of the water supply device, when the capacitance value of the water level sensing piece acquired by the main control circuit is the same as the capacitance value corresponding to the starting signal, a signal for restarting the impeller pump 7 is sent.

4. The impeller pump 7 continuously operates, and when the rotation speed of the impeller 71 collected by the main control circuit is increased to the rotation speed corresponding to the stop signal, a signal for stopping operation again is sent to the impeller pump 7, and meanwhile, the water supply device is instructed to fill water into the water container.

In the latter part of the operation cycle of each power-up of the submersible pump 9, the main control circuit issues a command for cyclic operation to the submersible pump 9 according to the above-described working steps 2 to 4.

In the above working mode of the invention, when the submersible pump 9 is electrified, the capacitance value corresponding to the water level sensing piece is obtained by collecting the rotation speed of the impeller 71 to reach a constant value, and is used as a starting signal of the impeller pump 7; when the rotation speed of the impeller 71 reaches a set upper speed limit value during the change of the capacitance value of the water level sensing plate, the impeller pump 7 is stopped, and the upper speed limit value is defined as a stop signal. The purposes of collecting relevant parameters of the water level sensing piece, starting the impeller pump 7 to work and collecting relevant parameters of the rotating speed of the impeller 71 to stop the impeller pump 7 are achieved.

The invention absorbs the advantages of the two detection modes, adopts a capacitive water level sensing piece monitoring signal as a starting instruction, so that the impeller pump 7 can be automatically started when water exists, and simultaneously adopts an impeller 71 rotating speed monitoring signal to determine the stop judgment of the impeller pump 7. Thus, misjudgment caused by water quality difference or foreign matter wrapping can be avoided.

The submersible pump 9 obtains power through the wireless charging module 14, a processor in the main control circuit confirms whether enough water exists in the water tank through monitoring the rotating speed and the capacitance value of the water level sensing piece and through calculation, and then sends out a command whether to continue working or not to the impeller pump 7, and meanwhile, the UV lamp 33 works according to different working states of the impeller pump 7 (for example, the UV lamp 33 is turned on when the water pump works normally, or is turned off).

The invention also has the advantages that when the impeller pump 7 is blocked and the rotating speed of the impeller 71 is lower than a set value, the main control circuit gives out a stop command, and meanwhile, the LED indicator lamp sends out an abnormal signal (such as red light display).

Claims (10)

1. The utility model provides a immersible pump that can accurate detection water level, places in the water container, and it includes casing (1), sets up inlet port (16) on terminal surface before casing (1) and impeller pump (7) of setting in casing (1), its characterized in that: the impeller pump (7) is arranged on the right side of the bottom plate of the shell (1), and a water level sensing sheet is arranged on the left side of the impeller pump (7) in the shell (1); the working state of the impeller pump (7) is determined by a main control circuit through collecting the impeller rotating speed of the impeller pump (7) and the capacitance value of a water level sensing sheet according to the following method:

1) After the submersible pump (9) is electrified and the impeller pump (7) is automatically operated every time, if a main control circuit of the submersible pump (9) monitors that the impeller rotating speed does not reach a diffuse impeller line state continuously rotating at a constant speed within a specified time, the main control circuit enables the impeller pump (7) to enter a standby state and instructs a water supply device arranged outside the submersible pump (9) to fill water into a water container; the impeller pump (7) is started to operate again after waiting for a set time under the condition that the capacitance value of the water level sensing sheet gradually changes from high to low, and when the impeller rotating speed is from high to low and maintains a set delay time in a diffuse impeller line state, the main control circuit takes the capacitance value of the water level sensing sheet collected immediately as a starting signal for the impeller pump (7) in the standby state to operate again;

or after the submersible pump (9) is electrified and the impeller pump (7) is automatically operated every time, when the impeller rotating speed is from high to low in a specified time, the diffuse impeller line state is maintained, and the delay time is maintained, the main control circuit takes the capacitance value of the water level sensing sheet which is collected immediately as a starting signal for the impeller pump (7) which is in a standby state after that;

2) The impeller pump (7) continuously operates, and when the capacitance value of the water level sensing piece gradually changes from low to high, the main control circuit sends out an instruction of stopping operation to the impeller pump (7) when the rotating speed of the impeller rises to a set upper speed limit value from the rotating speed corresponding to the diffuse impeller state, the instruction is called a stop signal, and meanwhile, a signal of filling water into the water container is sent out to the water supply device;

3) In the water supply process of the water supply device, when the capacitance value of the water level sensing sheet acquired by the main control circuit is the same as the capacitance value corresponding to the starting signal, a rerun signal is sent to the impeller pump (7);

4) The impeller pump (7) continuously operates, and when the impeller rotating speed collected by the main control circuit is increased to the rotating speed corresponding to the shutdown signal, a signal for stopping operation again is sent to the impeller pump (7), and meanwhile the water supply device is instructed to fill water into the water container.

2. The submersible pump capable of accurately detecting water level according to claim 1, wherein: the inside of the shell (1) is divided into a front cavity (21), a rear cavity (22) and a rotor cavity (25) positioned on the right side of the front cavity (21), the water inlet hole (16) is communicated with the front cavity (21), an impeller (71) of an impeller pump (7) is arranged in an impeller chamber (251) of the rotor cavity (25), the impeller chamber (251) is isolated from a rotor chamber (252) of the rotor cavity (25) through a front bearing (732) which is sealed by water, and a rotating shaft (731) of a rotor assembly (73) arranged in the rotor chamber (252) is connected with the impeller (71) through the front bearing (732); the water outlet (5) of the submersible pump (9) is arranged on the top plate of the shell (1) and is communicated with the impeller chamber (251); a stator assembly (72) of the vane pump (7) and a circuit board (23) carrying the main control circuit are mounted in the rear cavity (22).

3. The submersible pump capable of accurately detecting water level according to claim 2, wherein: be located in the space that is located impeller room (251) left side is assigned to back chamber (22) is equipped with UV lamp subassembly (3), and this UV lamp subassembly (3) are by light-transmitting baffle (31), sealing washer subassembly (32), UV lamp (33) and lighting fixture (34) that set gradually in the past to the back are constituteed, are equipped with light trap (35) in the position that corresponds with UV lamp subassembly (3) on the front wall board of back chamber (22), light-transmitting baffle (31) set up the rear side in light trap (35), and sealing washer subassembly (32) are with light trap (35), light-transmitting baffle (31) and UV lamp (33) water-tight isolation in proper order.

4. A submersible pump capable of accurately detecting water level as claimed in claim 3, wherein: the shell (1) comprises a front end cover (11), the water inlet hole (16) is arranged on the front end cover (11), and a water inlet guide plate (4) which can completely irradiate water sucked into the front cavity (21) through the water inlet hole (16) through the UV lamp (33) and then flow into the impeller chamber (251) is arranged in the shell (1) after the water inlet hole is arranged behind the front end cover (11).

5. The submersible pump capable of accurately detecting water level according to claim 4, wherein: the water inlet guide plate (4) is of a multi-layer clamping plate structure and comprises a lamp cavity front baffle plate (41) at the front side, a wheel cavity front baffle plate (42), a water guide groove (43), a front cavity (21) formed behind the lamp cavity front baffle plate (41), a water flow channel (44) between the lamp and the wheel, and a wheel sealing cavity plate (45) arranged behind the wheel cavity front baffle plate (42); the front baffle plate (41) of the lamp cavity is positioned in front of the light transmission hole (35), and the front cavity (21) is a gap through which water flows and is formed between the front baffle plate (41) of the lamp cavity and the light transmission hole (35); the water guide groove (43) is arranged between the lamp cavity front baffle (41) and the wheel cavity front baffle (42) and is a vertical flow passage for guiding inflow water into the front cavity (21); the wheel sealing cavity plate (45) is arranged at the rear side of the wheel cavity front baffle plate (42) and is covered on the impeller chamber (251) in a sealing mode, the water flow channel (44) between the lamp wheels is formed by a gap between the wheel sealing cavity plate (45) and the wheel cavity front baffle plate (42) and is communicated with the front cavity (21), and the water flow hole (46) which enables the water flow channel (44) between the lamp wheels to be communicated with the impeller chamber (251) is formed in the wheel sealing cavity plate (45).

6. The submersible pump capable of accurately detecting water level according to claim 5, wherein: a wireless charging receiving plate is arranged on a bottom plate in the shell (1) and positioned in a space below the rotor cavity (25) and belonging to the rear cavity (22).

7. The submersible pump capable of accurately detecting water level according to claim 6, wherein: and a wireless transmitting module which can supply power to the wireless charging receiving plate is arranged outside the shell (1) opposite to the wireless charging receiving plate.

8. The submersible pump capable of accurately detecting water level according to claim 2, wherein: an LED indicator lamp for indicating whether the submersible pump (9) is electrified or not is arranged on the circuit board (23).

9. The submersible pump capable of accurately detecting water level according to claim 7 or 8, wherein: the front end cover (11) comprises a front cover (12) which can be buckled on the main body (2) of the shell and a fence frame (13) which is arranged in front of the front cover (12), filter cotton (14) is filled in the fence frame (13), and a finger position (15) which is convenient for replacing the filter cotton (14) is arranged at the top edge of the front side frame of the fence frame (13).

10. The submersible pump capable of accurately detecting water level according to claim 9, wherein: the stator assembly (72) comprises a positioning bracket (721) and an upper stator winding (722) and a lower stator winding (723) which are arranged in a separated mode, the positioning bracket (721) is arranged in the left side space of the rear cavity (22), the upper stator winding (722) and the lower stator winding (723) are wrapped on the peripheral wall of the rotor cavity (25) in a relative arrangement mode, and the rotor assembly (73) arranged in the rotor cavity (25) is placed in a magnetic field generated by the stator windings.