WO2023137733A1

WO2023137733A1 - Water filter having indicator light for warning filter element blockage and method for warning filter element blockage

Info

Publication number: WO2023137733A1
Application number: PCT/CN2022/073342
Authority: WO
Inventors: 李春云; 刘远波; 万森
Original assignee: 深圳市兴日生实业有限公司
Priority date: 2022-01-23
Filing date: 2022-01-23
Publication date: 2023-07-27

Abstract

A water filter having an indicator light for warning filter element blockage and a method for warning filter element blockage. The water filter comprises a water filter body (11), a motor (50), an indicator light circuit (20), and an indicator light power supply device; a filter element (12) and a pre-filtration water cavity (13) are accommodated in the water filter body (11); the motor (50) is used as a water pumping power device of the water filter; the filter element (12) is used for water filtration; a floating device (15) is provided in the pre-filtration water cavity (13); the floating device (15) floats along with the water level in the pre-filtration water cavity (13); the floating device (15) comprises a floating switch controller (156); the indicator light circuit (20) comprises an indicator light (21) and an indicator light switch (22); the floating switch controller (156) controls the opening and closing of the indicator light switch (22); the indicator light power supply device supplies power to the indicator light circuit (20); the indicator light switch (22) controls the turn-on or turn-off of the indicator light (21); the indicator light power supply device comprises an inductive power obtaining component, and the inductive power obtaining component obtains electric energy from the motor (50) by using the principle of electromagnetic induction.

Description

Water filter with indicator light for warning filter element clogging and warning method for filter element clogging

technical field

The invention relates to a water filter device for aquaculture, in particular to a real-time indication of the state of a filter element in the water filter device, in particular to a plug-in water filter with filter blockage warning and a warning method thereof.

Background technique

The prior art water filter used for aquaculture aims to purify the water body in the aquarium culture tank, ensure the water quality of the water body is pure, and is suitable for the healthy growth of ornamental fish. In the prior art water filter, in the water circulation system of the aquarium tank, the polluted water is pumped into the filter, and after being filtered by the inner filter element, the pure water flows back to the aquarium tank from the water outlet. The key component of the water filter is the filter element, which prevents the passage of solid particles suspended in the water and is responsible for the main task of filtering and purifying the water body. Therefore, after a period of use, the filter element will be saturated, causing its filtering and purification functions to be greatly weakened. Therefore, the filter element has a certain service life and a certain load limit.

In order to achieve the maximum efficiency of the water filter, any filter elements that are saturated or used for a period of time must be replaced. And because consumers can't be reminded to replace the filter element in good time, the water quality will often deteriorate, affect the growth and survival of ornamental fish, or replace the filter element too early to cause waste.

The plug-in water filter used in aquariums, when the plug-in filter element is inserted into the water filter, the water level difference between the pre-filter water chamber and the filter water chamber is not large because the filter element has little resistance to the fluid. However, if the filter element is saturated, that is, it is blocked by solid particles or other dirt, the water level in the pre-filter water chamber will rise.

In the prior art, if the publication number is CN203577446U and the name is "the water filter with filter core clogging warning", this phenomenon is just utilized to design a float type indicating device to warn the clogging of the filter core. As shown in accompanying

drawings

18 and 19, the float type indicating device includes a float ball, a connecting rod and a color code, wherein the color code can only be observed in a specific direction. In the absence of attention, it is not easy to be observed.

In the prior art, an LED indicator device is also used to warn the blockage of the filter element. As shown in Figures 20 and 21, the LED indicator device in the prior art is powered by a battery, and the LED indicator light is turned on and off by the contact between the two electrodes and the water surface; Since the two electrodes will be immersed in water when they are turned on, the electrodes are easily oxidized when exposed to water, and the product life is shortened. The LED indicating device is powered by a battery, and the battery needs to be replaced regularly, which is inconvenient to use and not environmentally friendly.

Contents of the invention

The technical problem to be solved by the present invention is to avoid the short service life of the device for warning the clogging of the filter element in the above-mentioned prior art, the need to replace the battery, and the insufficient range that the indicator color code can observe is not wide enough, and propose a water filter with an indicator light to warn that the filter element is clogged.

The technical solution for solving the above-mentioned technical problems in the present application is a water filter with an indicator light to warn that the filter element is blocked, including a water filter main body, a motor, an indicator light circuit, and an indicator light power supply device; the main body of the water filter is provided with a filter element and a water cavity before the filter; ; The state of the switch of the indicator light controls whether the indicator light is turned on or off; the power supply device for the indicator light includes an induction power receiving part, and the induction power receiving part uses the principle of electromagnetic induction to obtain electric energy from the motor.

The induction power receiving part includes an induction coil; the motor includes a motor coil; the combination of the motor coil and the induction coil forms a transformer, and the induction coil obtains electric energy from the motor coil and supplies power to the indicator light circuit.

The winding of the motor coil and the winding of the induction coil are arranged on the same iron core; the ratio of the turns of the motor coil to the turns of the induction coil is equal to the ratio of the input voltage of the motor to the power supply voltage of the indicator light circuit.

The water filter with an indicator light to warn that the filter element is blocked also includes a transparent upper cover; the indicator light is arranged on the upper edge of the indicator light circuit; the transparent upper cover is arranged above the indicator light to cover the indicator light; after the indicator light below the transparent upper cover is lit, the light emitted by the indicator light diverges outward through the transparent upper cover.

The floating main body of the floating device floats following the water level in the pre-filter water chamber; the floating main body is connected with the floating switch controller; the main body of the water filter is provided with a floating positioning device;

The main body of the indicator light circuit is arranged in the control box assembly; the indicator light is arranged on the upper edge of the indicator light circuit; the control box assembly is arranged on the outer wall of the water filter main body; a transparent upper cover is fixedly connected with the upper part of the main body of the control box assembly, so that the transparent upper cover is located above the indicator light and covers the indicator light; after the indicator light below the transparent upper cover is lit, the light emitted by the indicator light diverges outward through the transparent upper cover; the float switch controller includes a magnet; the indicator light switch is a magnetic switch.

The technical solution for solving the above-mentioned technical problems in the present application can also be a warning method for clogging of the filter element in the water filter. Based on the fact that a replaceable filter element is placed in the main body of the water filter, a pre-filter water cavity is set at the water inlet of the filter element, and the phenomenon that the water level of the pre-filter water cavity will rise due to the blockage of the filter element is used to build a warning mechanism; including the following steps:

Step A: A floating device is installed in the water chamber before filtration; the floating device floats following the water level in the water chamber before filtration; the floating device includes a float switch controller;

Step B: Setting up the indicator lamp circuit includes the indicator lamp and the indicator switch; the float switch controller controls the opening and closing of the indicator switch;

Step C: Set the indicator light power supply device to supply power to the indicator light circuit; the indicator light power supply device includes an induction power receiving part, which uses the principle of electromagnetic induction to obtain electric energy from the motor; the motor is used as a pumping power device for the water filter;

Step D: The floating device follows the water level in the pre-filter water chamber to float up and down, and the floating device drives the float switch controller to float up and down, so that the position of the float switch controller relative to the indicator switch changes, thereby controlling the switch state of the indicator switch; the indicator switch controls the indicator light to be on or off; Drive the floating switch controller to fall, the position of the floating switch controller does not correspond to the position of the indicator switch, the indicator switch is turned on, the indicator circuit is not connected, and the indicator light is not turned on.

In the water filter with an indicator light to warn that the filter element is blocked, the induction power receiving part includes an induction coil; the motor includes a motor coil; the motor coil and the induction coil form a transformer, and the induction coil obtains electric energy from the motor coil and supplies power to the indicator light circuit.

The water filter with an indicator light to warn that the filter core is blocked also includes a transparent upper cover; the indicator light is arranged on the upper edge of the indicator light circuit; the transparent upper cover is arranged above the indicator light to cover the indicator light; after the indicator light below the transparent upper cover is lit, the light emitted by the indicator light diverges outward through the transparent upper cover.

In the water filter with indicator light to warn that the filter core is clogged, the floating body of the floating device floats with the water level in the water chamber before filtering; the floating body is connected with the floating switch controller; the water filter body is provided with a floating positioning device; corresponding to the closed or open position.

Compared with the prior art, one of the beneficial effects of the technical solution in the present application is: skillfully utilizing the characteristics of the motor of the power part in the water filter device, and using the principle of electromagnetic induction to make the part that should receive power obtain electric energy from the motor 50 and supply power to the indicator circuit 20; such a power supply method eliminates the inconvenience of regular battery replacement for battery power supply, is more energy-saving, environmentally friendly, and more convenient to use.

Compared with the prior art, the second beneficial effect of the technical solution in this application is: the floating switch controller 156 controls the lighting or closing of the indicator light 21 in the indicator light circuit 20; so that the blockage alarm can be timely and accurate.

Compared with the prior art, the third beneficial effect of the technical solution in the present application is: the motor coil 511 and the induction coil 31 are combined to form a transformer, and the windings of the motor coil 511 and the induction coil 31 are arranged on the same iron core; the principle of the wireless induction power acquisition method is simple in principle, convenient to implement, and low in cost.

Compared with the prior art, the fourth beneficial effect of the technical solution in this application is: the setting of the transparent upper cover 60 can turn the light emitted by a single point of the LED lamp into a light-emitting area through the transparent upper cover 60, so that the light of the LED lamp can be emitted in more directions, and the prompting effect of the warning information is improved. Compared with the single-point lighting in the prior art, it can be observed more easily.

Description of drawings

Fig. 1 is a schematic diagram of an axonometric projection of a water filter 10 in cooperation with an aquarium;

Fig. 2 is one of the axonometric projection schematic diagrams of the combined state of the water filter 10;

Fig. 3 is the second schematic diagram of the axonometric projection of the combined state of the water filter 10;

Fig. 4 is one of the axonometric projection schematic diagrams of the decomposed state of the water filter 10;

Fig. 5 is the second schematic diagram of the axonometric projection of the decomposed state of the water filter 10; the label 55 in Fig. 5 is the bottom cover of the motor;

Fig. 6 is a schematic diagram of axonometric projection after removing the water filter main body 11;

Figure 7 is a partially exploded schematic diagram of Figure 6, in which the motor 50 is in an exploded state;

FIG. 8 is a schematic diagram of the skeleton of the motor 50;

FIG. 9 is a schematic top view of the water filter 10 with the top cover 40 and the bottom surface removed;

FIG. 10 is one of the schematic side view orthographic projections of the water filter 10;

Fig. 11 is one of the schematic cross-sectional views of BB in Fig. 10;

Fig. 12 is the second schematic cross-sectional view of BB in Fig. 10;

13 is a schematic diagram of a cross-sectional axonometric projection of the water filter 10 along its own transverse centerline;

FIG. 14 is the second schematic side view orthographic projection of the water filter 10;

Fig. 15 is a schematic cross-sectional view along AA of Fig. 14;

Fig. 16 is a schematic diagram of a sectional axonometric projection along the transverse midline of Fig. 1;

Fig. 17 has only shown the water filter among Fig. 16; In Fig. 17, label 18 is biochemical filtering device;

Fig. 18 is a cross-sectional orthographic schematic diagram of a water filter along its own transverse centerline in the prior art;

Fig. 19 is a cross-sectional orthographic schematic diagram of a water filter along its own transverse centerline in the prior art;

Fig. 20 is a cross-sectional front projection of another water filter along its own transverse centerline in the prior art;

Fig. 21 is a cross-sectional orthographic schematic diagram of another water filter in the prior art along its own transverse midline;

H1 in the figure represents the water level when the filter element 12 is not blocked; H2 in the figure represents the water level when the filter element 12 is blocked,

Among Fig. 18 and Fig. 19, label 710 is the light-transmitting window that transparent material is made; Label 40 is top cover; Label 715 is red display block, and label 716 is floating ball; When can see red display block in the light-transmitting window 710 that transparent material is made, expression filter core is clogged, needs to change;

In Fig. 20 and Fig. 21, the reference numeral 83 is the positive pole of the circuit, the numeral 82 is the negative pole of the circuit, the numeral 81 is the LED lamp bead, and the numeral 40 is the top cover.

Detailed ways

Embodiments of the present invention will be described in further detail below in conjunction with the accompanying drawings.

As shown in Fig. 1 and Fig. 2, when a kind of water filter 10 with pilot lamp warning filter element clogging is used together with aquarium 80, water filter 10 is hung on the side wall of aquarium 80, and water filter 10 is provided with top cover 40.

As shown in Figure 3 to Figure 9 and Figure 16 and Figure 17, a kind of water filter 10 with indicator light warning filter core blockage, comprises water filter main body 11, motor 50, indicator light circuit 20, indicator lamp power supply device; 15 includes a floating switch controller 156; the indicator light circuit 20 includes an indicator light 21 and an indicator light switch 22; the floating switch controller 156 controls the opening and closing of the indicator light switch 22; the indicator light power supply device supplies power for the indicator light circuit 20; the state of the indicator light switch 22 controls the light state of the indicator light 21;

As shown in Figures 5 to 9, the control box assembly 70 is arranged on one side of the water filter body 11, and a wire groove 19 is also arranged on the outer wall of the water filter body 11; a connecting wire 32 is arranged in the wire groove 19;

As shown in FIGS. 5 to 9 , the inductive power-gathering component includes an induction coil 31 ; the motor 50 includes a motor coil 511 ; The windings of the motor coil 511 and the induction coil 31 are arranged on the same iron core; the ratio of the turns of the motor coil 511 to the turns of the induction coil 31 is equal to the ratio of the input voltage of the motor 50 to the power supply voltage of the indicator light circuit.

As shown in FIG. 5 to FIG. 9 and FIG. 13 and FIG. 15 , the motor 50 includes a stator 51 and a rotor 52 ; The rotor 52 is installed in the pre-filter water cavity 13 at the bottom of the water filter main body 11; the rotor 52 rotates to make the water filter 10 draw water from the external aquarium.

As shown in Fig. 5 to Fig. 9 and Fig. 13 and Fig. 15, stator 51 comprises motor coil 511, coil bobbin 515, iron core 513; Iron core 513 passes through hollow coil bobbin 515; Coil bobbin 515 comprises the first skeleton 5151 and the second skeleton that are arranged in parallel; An isolation ring 5155 ; a terminal 5154 is provided at the end of the induction coil frame 5153 . The motor coil 511 includes a first motor coil wound on a first frame 5151 and a second motor coil wound on a motor coil frame 5152; the first motor coil and the second motor coil can be connected in series or in parallel. The windings of the induction coil 31 are wound on the induction coil bobbin 5153 . One end of the connecting wire 32 is electrically connected to the output end of the winding of the induction coil 31 through the terminal 5154 , and the other end of the connecting wire 32 is electrically connected to the indicator light circuit 20 .

As shown in Fig. 4, Fig. 10 to Fig. 16, the water filter with an indicator light warning that the filter element is blocked also includes a transparent upper cover 60; the indicator light 21 is arranged on the upper edge of the indicator light circuit 20; The main body of the indicator light circuit 20 is arranged in the control box assembly 70; the control box assembly 70 is arranged on the outer wall of the water filter main body 11; the float switch controller 156 includes a magnet; the indicator light switch 22 is a magnetic control switch. The indicator light 21 is arranged on the upper edge of the indicator light circuit 20; the transparent upper cover 60 is fixedly connected with the upper part of the main body of the control box assembly 70, so that the transparent upper cover 60 is located above the indicator light 21 and covers the indicator light 21. The main body of the control box assembly 70 is made of opaque material, so that the light emitted by the indicator light 21 can only be sent out from the transparent upper cover 60 as much as possible.

The transparent upper cover 60 can be set separately, or can be set on the upper part of the main body of the control box assembly 70 . The shape of the transparent upper cover 60 may be a regular strip or an irregular strip. The transparent upper cover 60 as a whole is used as a light-transmitting window, which radiates single-point LED lights to more directions and a wider range, thereby improving the prompting effect of warning information.

As shown in Fig. 4, Fig. 10 to Fig. 16 show the water filter with indicator light warning filter core plugging, the floating main body 151 of floating device 15 follows the water level floating in the water chamber 13 before filtering; 156 floats up; the positions of the floating positioning device 17 and the floating main body 151 are corresponding; the floating main body 151 is arranged on the periphery of the floating positioning device 17; The floating switch controller 156 is connected to the floating main body 151 through the floating connection frame 152 .

A warning method for clogging of a filter element in a water filter, based on the fact that a replaceable filter element 12 is housed in a water filter body 11, and a pre-filter water cavity 13 is set at the water inlet of the filter element 12, and the phenomenon that the water level of the pre-filter water cavity 13 rises due to the clogging of the filter element 12 is used to construct a warning mechanism; Step A: a floating device 15 is arranged in the pre-filter water cavity 13; the floating device 15 follows the water level in the pre-filter water cavity 13; 6; Step B: the indicator light circuit 20 is set to include the indicator light 21 and the indicator light switch 22; the floating switch controller 156 controls the opening and closing of the indicator light switch 22; Step C: the indicator light power supply device is set to supply power for the indicator light circuit 20; The position of the switch controller 156 relative to the indicator switch 22 changes, thereby controlling the switch state of the indicator switch 22 ; the state of the indicator switch 22 controls the lighting state of the indicator light 21 .

As shown in Figure 12, H2 in the figure represents the water level when the filter element 12 is blocked. When the filter element 12 is blocked, the water level in the pre-filter water chamber 13 rises, and the floating device 15 drives the float switch controller 156 to float up.

As shown in Figure 11, H1 in the figure represents the water level when the filter element 12 is not blocked. When the filter element 12 is blocked, the water level in the water chamber 13 before the filter decreases, and the floating device 15 drives the floating switch controller 156 to fall. The indicator light 21 is a red LED indicator light. The water filter is a plug-in water filter, and the filter element 12 is a plug-in card-shaped water filter card.

The above is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process conversion made by using the description of the invention and the contents of the accompanying drawings, or directly or indirectly used in other related technical fields, is also included in the scope of patent protection of the present invention.

Claims

A water filter with an indicator light to warn that the filter core is blocked, which is characterized in that:

Including a water filter main body (11), a motor (50), an indicator light circuit (20), and an indicator light power supply device;

The main body (11) of the water filter is provided with a filter element (12) and a pre-filter water cavity (13);

The motor (50) is used as a pumping power device for the water filter; the filter element (12) is used for water filtration;

A floating device (15) is arranged in the pre-filtration water chamber (13); the floating device (15) floats following the water level in the pre-filtration water chamber (13); the floating device (15) includes a floating switch controller (156);

The indicator light circuit (20) includes an indicator light (21) and an indicator light switch (22); the floating switch controller (156) controls the opening and closing of the indicator light switch (22); the indicator light power supply device supplies power for the indicator light circuit (20); the state of the indicator light switch (22) controls the indicator light (21) to light or close;

The power supply device for the indicator light includes an inductive power-acquiring component, which obtains electric energy from the motor (50) by using the principle of electromagnetic induction.
The water filter with an indicator light to warn that the filter element is clogged according to claim 1, wherein,

The inductive power receiving part includes an induction coil (31);

The motor (50) includes a motor coil (511);

The motor coil (511) and the induction coil (31) are combined to form a transformer, and the induction coil (31) obtains electric energy from the motor coil (511) through induction, and supplies power to the indicator light circuit (20).
The water filter with an indicator light to warn that the filter element is clogged according to claim 2, wherein,

The winding of the motor coil (511) and the winding of the induction coil (31) are arranged on the same iron core;

The ratio of the number of turns of the motor coil (511) to the number of turns of the induction coil (31) is equal to the ratio of the input voltage of the motor (50) to the power supply voltage of the indicator light circuit.
The water filter with an indicator light to warn that the filter element is clogged according to claim 1, wherein,

Also includes a transparent upper cover (60);

The indicator light (21) is arranged on the upper edge of the indicator light circuit (20);

The transparent upper cover (60) is arranged on the top of the indicator light (21) to cover the indicator light (21);

After the indicator light (21) below the transparent loam cake (60) is lit, the light that the indicator light (21) sends is outwardly divergent through the transparent loam cake (60).
The water filter with an indicator light to warn that the filter element is clogged according to claim 1, wherein,

The floating main body (151) of the floating device (15) floats with the water level in the pre-filter water cavity (13); the floating main body (151) is connected with the floating switch controller (156);

A floating positioning device (17) is arranged inside the water filter main body (11);

The floating main body (151) is arranged on the periphery of the floating positioning device (17), so that the floating main body (151) can float up and down along the floating positioning device (17); when the floating main body (151) made of light material floats up, it drives the floating switch controller (156) to float up;

The positions of the floating positioning device (17) and the floating main body (151) correspond;

The floating body (151) is arranged on the periphery of the floating positioning device (17);

The position where the floating switch controller (156) floats up and down along the floating positioning device (17) following the floating main body (151) corresponds to the closed or open position of the indicator light switch (22).
The water filter with an indicator light to warn that the filter element is clogged according to claim 5, wherein,

The main body of the indicator light circuit (20) is arranged in the control box assembly (70); the indicator light (21) is arranged on the upper edge of the indicator light circuit (20); the control box assembly (70) is arranged on the outer wall of the water filter main body (11);

Also includes a transparent upper cover (60), the transparent upper cover (60) is fixedly connected with the upper part of the control box assembly (70) main body, so that the transparent upper cover (60) is located above the indicator light (21) and covers the indicator light (21);

After the indicator light (21) below the transparent loam cake (60) is lit, the light emitted by the indicator light (21) spreads outward through the transparent loam cake (60); the float switch controller (156) includes a magnet; the indicator light switch (22) is a magnetically controlled switch.
A warning method for blockage of a filter element in a water filter, characterized in that:

Based on the water filter (10) with an indicator light to warn that the filter element is blocked;

In the water filter (10) with an indicator light to warn that the filter element is clogged, a replaceable filter element (12) is placed in the water filter body (11), and a pre-filter water chamber (13) is arranged at the water inlet of the filter element (12), and a warning mechanism is constructed by utilizing the phenomenon that the filter element (12) is blocked and the water level of the pre-filter water chamber (13) rises;

Including the following steps:

Step A: a floating device (15) is provided in the pre-filtration water chamber (13); the floating device (15) floats following the water level in the pre-filtration water chamber (13); the floating device (15) includes a float switch controller (156);

Step B: the indicator lamp circuit (20) is set to include the indicator lamp (21) and the indicator switch (22); the floating switch controller (156) controls the opening and closing of the indicator switch (22);

Step C: setting the indicator lamp power supply device to supply power to the indicator lamp circuit (20); the indicator lamp power supply device includes an induction power-receiving part, and the induction power-receiving part obtains electric energy from the motor (50) by using the principle of electromagnetic induction; the motor (50) is used as a pumping power device for the water filter;

Step D: the floating device (15) floats up and down following the water level in the pre-filter water chamber (13), and the floating device (15) drives the floating switch controller (156) to float up and down, so that the position of the floating switch controller (156) relative to the indicator switch (22) changes, thereby controlling the switch state of the indicator switch (22); the indicator switch (22) controls the indicator light (21) to light on or off;

When the filter element (12) was clogged, the water level in the pre-filter water chamber (13) rose, and the floating device (15) drove the floating switch controller (156) to float up, the position of the floating switch controller (156) corresponds to the position of the indicator switch (22), the indicator switch (22) is closed, the indicator light circuit (20) is connected, and the indicator light (21) is turned on;

When the filter core (12) was blocked and eliminated, the water level in the water chamber (13) before the filter was reduced, and the floating device (15) drove the floating switch controller (156) to fall, and the position of the floating switch controller (156) did not correspond to the position of the indicator switch (22), and the indicator switch (22) was opened, and the indicator circuit (20) was not connected, and the indicator light (21) was not turned on.
The warning method for blockage of the filter element in the water filter according to claim 7, characterized in that:

In the water filter (10) with an indicator light to warn that the filter core is blocked, the induction power receiving part includes an induction coil (31);

The motor (50) includes a motor coil (511);

The motor coil (511) and the induction coil (31) are combined to form a transformer, and the induction coil (31) obtains electric energy from the motor coil (511) through induction, and supplies power to the indicator light circuit (20).
The warning method for blockage of the filter element in the water filter according to claim 7, characterized in that:

In the water filter (10) with an indicator light warning that the filter core is blocked, a transparent upper cover (60) is also included;

The indicator light (21) is arranged on the upper edge of the indicator light circuit (20);

The transparent upper cover (60) is arranged on the top of the indicator light (21) to cover the indicator light (21);

After the indicator light (21) below the transparent loam cake (60) is lit, the light that the indicator light (21) sends is outwardly divergent through the transparent loam cake (60).
The warning method for blockage of the filter element in the water filter according to claim 7, characterized in that:

In the water filter (10) with an indicator light warning that the filter core is blocked, the floating body (151) of the floating device (15) floats following the water level in the water chamber (13) before the filter; the floating body (151) is connected to the floating switch controller (156); the water filter body (11) is provided with a floating positioning device (17);

The floating main body (151) is arranged on the periphery of the floating positioning device (17), so that the floating main body (151) can float up and down along the floating positioning device (17);

When the floating body (151) made of light material floats up, it drives the float switch controller (156) to float up;

The positions of the floating positioning device (17) and the floating main body (151) correspond;

The floating body (151) is arranged on the periphery of the floating positioning device (17);

The position where the floating switch controller (156) floats up and down along the floating positioning device (17) following the floating main body (151) corresponds to the closed or open position of the indicator light switch (22).