A filter medium dirt prompting structure and filter device

Abstract

The present invention provides a filter medium dirt prompt structure, comprising: a filter element, a prompt component; the prompt component has a movable part, one end of the movable part is connected to the water inlet end or the water outlet end of the filter element, and the other end is connected to the water outlet end or the water inlet end of the filter element or the outside air; when the filter element is dirty, the pressure at the water inlet end increases or the pressure at the water outlet end decreases, driving the movable part to move, so as to prompt the user to replace the filter element. The present invention also provides a filtering device, having the filter medium dirt prompt structure as described above.

Description

Technical Field

[0001] The invention relates to water treatment equipment, in particular to filtering equipment. Background Art

[0002] The water purifier can filter out harmful substances and purify the water quality in the swimming pool. This filtration work is completed by the "filter element", the spleen of the water purifier. The filter element has a service life. Once the filter element expires, the water purifier will not only fail to complete the water purification function, but will also release harmful substances. If you continue to soak in the swimming pool at this time, it will cause certain harm to the human body, so the filter element needs to be replaced in time.

[0003] After searching, the patent with publication number CN208757088U discloses an indicator of the status of a water purifier filter element and a purified water supply system, including: a fixed structure, a status indicator light and a signal line, wherein the fixed structure is used to fix the indicator, and the status indicator light is arranged on the outside of the fixed structure, and a filter element service life indicator light is provided, but it does not have a light to indicate the clogging status of the filter element. In some public places, due to the large number of users and the frequent use of the water purifier, the filter element will be clogged faster, and the life of the filter element will be relatively shorter, and the water quality in some areas may be different, so it is not possible to rely solely on the service life of the filter element to determine whether the filter element needs to be replaced. Therefore, a water purifier filter element usage status indicator device is needed to meet people's needs.

[0004] In the current traditional water purification filtration devices, most of the prompts for replacing the filter media are the following two:

[0005] 1. The user regularly disassembles and checks the dirtiness of the filter medium by himself. This method is troublesome to operate and has low accuracy.

[0006] 2. Use a pressure gauge or pressure sensor to remind the user to replace the filter medium - this method has high accuracy, but the product cost increases significantly. Summary of the invention

[0007] The main technical problem to be solved by the present invention is to provide a filter medium dirt prompt structure which is low in cost and easy to use.

[0008] In order to solve the above technical problems, the present invention provides a filter medium dirt prompt structure, comprising: a filter element, a prompt component; the prompt component has a movable part, one end of the movable part is connected to the water inlet end of the filter element, and the other end is connected to the water outlet end of the filter element or the outside air;

[0009] When the filter element is dirty, the pressure at the water inlet end increases or the pressure at the water outlet end decreases, driving the movable part to move, so as to prompt the user to replace the filter element.

[0010] In a preferred embodiment: the prompt component includes a shell, an elastomer, a valve core and an elastic bag; the valve core is arranged at the movable end of the elastic bag to form the movable part; the side of the elastic bag away from the movable end is connected to the water inlet end; the elastic bag and the valve core are arranged in the shell, one end of the elastomer is fixed to the inner wall of the shell, and the other end abuts the movable end of the elastic bag; the shell is also provided with an exhaust hole connected to the atmosphere.

[0011] In a preferred embodiment: the prompt component includes a shell, a valve core and an elastomer, the valve core is movably arranged in the shell to form the movable part, one side of the valve core is connected to the water inlet end, and the other side abuts against one end of the elastomer; the other end of the elastomer is fixed on the inner wall of the shell.

[0012] In a preferred embodiment: the prompt component comprises a housing, a valve core and an elastic bag; the valve core is arranged at the movable end of the elastic bag to form the movable part; the side of the elastic bag away from the movable end is connected to the water inlet end; the elastic bag and the valve core are arranged in the housing, one end of the elastic body is fixed to the inner wall of the housing, and the other end abuts against the movable end of the elastic bag;

[0013] The side of the valve core away from the elastic bag is connected to the water outlet through the water inlet hole on the shell.

[0014] In a preferred embodiment: the prompt component comprises a housing, a valve core and an elastic body, the valve core is movably arranged in the housing to form the movable part, one side of the valve core is connected to the water inlet end and abuts against one end of the elastic body; the other end of the elastic body is fixed to the inner wall of the housing;

[0015] The side of the valve core away from the elastic bag is connected to the water outlet through the water inlet hole on the shell.

[0016] In a preferred embodiment: a display window for observing the position of the valve core is provided on the housing.

[0017] In a preferred embodiment: the prompt component comprises a housing, a valve core and an elastic body; the valve core is arranged at the movable end of the elastic body to form the movable part; the side of the elastic body away from the movable end is connected to the water inlet end; the elastic body and the valve core are arranged in the housing;

[0018] The side of the valve core away from the elastic body is connected to the water outlet through the water inlet hole on the shell;

[0019] The shell is provided with an indicator sticker, and the valve core covers different areas of the indicator sticker when the valve core is located at different positions.

[0020] In a preferred embodiment: the prompt component comprises a housing, a valve core and an elastic body; the valve core is arranged at the movable end of the elastic body to form the movable part; the side of the elastic body away from the movable end is connected to the water inlet end; the elastic body and the valve core are arranged in the housing;

[0021] The side of the valve core away from the elastic body is connected to the water outlet through the water inlet hole on the shell;

[0022] The valve core is provided with a magnet, and the housing is provided with a circuit board; the circuit board determines the position of the valve core through the relative position with the magnet and sends out a prompt signal.

[0023] In a preferred embodiment: the prompt signal is a light signal or a sound signal or an APP reminder signal of a smart terminal.

[0024] In a preferred embodiment: the prompt assembly comprises: a pull rod, a convex bulge and a shell; the convex bulge is swingably connected to the pull rod at an eccentric position; the shell has an observation window for observing the position of the convex bulge;

[0025] When the filter element is dirty, the two ends of the pull rod move along their own axis due to the increase of pressure at the water inlet end or the decrease of pressure at the water outlet end, and pull the convex bag to swing.

[0026] In a preferred embodiment: the convex bump is eccentrically provided with a first protrusion, the pull rod is provided with a slot matched with the first protrusion, and the slot extends in a direction perpendicular to the axial direction of the pull rod itself;

[0027] The convex bulge is also provided with a second convex column at the axis center, and the pull rod is provided with a clearance groove along its own axial direction; when the convex bulge swings, the second convex column moves in the clearance groove, and the first convex column moves in the clamping groove.

[0028] In a preferred embodiment: the pull rod is connected to a reset elastic member; when the two ends of the pull rod move along their own axis due to an increase in pressure at the water inlet end or a decrease in pressure at the water outlet end, the reset elastic member is squeezed to accumulate elastic reset force.

[0029] In a preferred embodiment: the prompt assembly includes a pull rod, a dial and a housing; the housing has an observation window for observing the relative position of the dial and the housing;

[0030] The pull rod and the dial are connected via a reversing member, and the reversing member is used to reversing the translation of the pull rod along its own axis into the rotation of the dial around its own axis;

[0031] When the filter element is dirty, the two ends of the pull rod move along their own axis due to the increase of pressure at the water inlet end or the decrease of pressure at the water outlet end, and drive the dial to rotate.

[0032] In a preferred embodiment: the dial has a column that movably cooperates with the pull rod; the switching member is a spiral guide rail arranged on the column and a slider arranged on the pull rod; the slider movably cooperates with the spiral guide rail.

[0033] In a preferred embodiment: the pull rod is connected to a reset elastic member; when the two ends of the pull rod move along their own axis due to an increase in pressure at the water inlet end or a decrease in pressure at the water outlet end, the reset elastic member is squeezed to accumulate elastic reset force.

[0034] In a preferred embodiment: the prompt component includes a tympanic membrane, a flow switch, a circuit board and a valve stem; one end of the valve stem is linked to the convex surface of the tympanic membrane, and the flow switch is fixed to the valve stem; a Hall element is arranged on the circuit board;

[0035] When the filter element is dirty, the convex surface of the eardrum is flattened due to the increase in pressure at the water inlet or the decrease in pressure at the water outlet, driving the valve stem and the flow switch to move relative to the circuit board, so that the flow switch cooperates with the Hall element.

[0036] In a preferred embodiment: the prompt assembly includes a micro switch, a valve stem and an elastic member;

[0037] One end of the valve stem is linked to the elastic member, and the other end is used to cooperate with the micro switch; when the filter element becomes dirty, the elastic member is squeezed due to the increase in pressure at the water inlet end or the decrease in pressure at the water outlet end, driving the valve stem to move to the second position, so that the other end of the valve stem triggers the micro switch.

[0038] The present invention also provides a filtering device having the above-mentioned filter medium dirt prompting structure.

[0039] In a preferred embodiment: the prompt component is arranged outside the filtering device, one side of the prompt component is connected to the water inlet of the filtering device, and the other end is connected to the filtering device through a hose.

[0040] In a preferred embodiment: the prompt component is arranged in the filtering device and is located below the filter element.

[0041] Compared with the prior art, the technical solution of the present invention has the following beneficial effects:

[0042] 1. The present invention provides a filter medium dirt prompt structure, which sets a movable component and utilizes the characteristic that the pressure at the water inlet end increases when the filter element is dirty, so that the movable component can be in different positions before and after the filter element is dirty. The user can judge whether the filter element is dirty and needs to be replaced by observing the position of the movable component, which is very intuitive and has low cost.

[0043] 2. The present invention provides a filter medium dirt prompt structure, which utilizes the characteristic that the movable component is in different positions before and after the filter element is dirty, and can be provided with an indicator sticker or a sensing circuit, thereby further facilitating the user to perceive that the filter element is dirty and needs to be replaced. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 It is a cross-sectional view of a preferred embodiment 1 of the present invention;

[0045] Figure 2 It is an exploded view of the prompt component in the preferred embodiment 1 of the present invention;

[0046] Figure 3 It is a cross-sectional view of a preferred embodiment 2 of the present invention;

[0047] Figure 4 It is an exploded view of the prompt component in the preferred embodiment 2 of the present invention;

[0048] Figure 5 It is a cross-sectional view of a preferred embodiment 3 of the present invention;

[0049] Figure 6 It is an exploded view of the prompt component in the preferred embodiment 3 of the present invention;

[0050] Figure 7 It is a cross-sectional view of a preferred embodiment 4 of the present invention;

[0051] Figure 8 It is an exploded view of the prompt component in the preferred embodiment 4 of the present invention;

[0052] Fig. 9 It is a cross-sectional view of a preferred embodiment 5 of the present invention;

[0053] Fig.10 It is an exploded view of the prompt component in the preferred embodiment 5 of the present invention;

[0054] Fig.11 It is a cross-sectional view of a preferred embodiment 6 of the present invention;

[0055] Fig.12 It is an exploded view of the prompt component in the preferred embodiment 6 of the present invention;

[0056] Fig.13 is a cross-sectional view of a preferred embodiment 7 of the present invention;

[0057] Fig.14 It is an exploded view of the prompt component in the preferred embodiment 7 of the present invention;

[0058] Fig.15 This is a state diagram of the prompt component before and after the filter element is dirty in the preferred embodiment 7 of the present invention;

[0059] Fig.16 is a cross-sectional view of a preferred embodiment 8 of the present invention;

[0060] Fig.17 It is an exploded view of the prompt component in the preferred embodiment 8 of the present invention;

[0061] Fig.18 This is a working principle diagram of the prompt component in the preferred embodiment 8 of the present invention;

[0062] Fig.19 It is an exploded view of the prompt component in the preferred embodiment 9 of the present invention;

[0063] Fig. 20 It is a cross-sectional view of the filter element dirtiness warning assembly in the preferred embodiment 9 of the present invention; Fig.21 It is a cross-sectional view of the filter element dirty prompt component in the preferred embodiment 9 of the present invention;

[0064] Fig. 22 It is an exploded view of the prompt component in the preferred embodiment 10 of the present invention;

[0065] Fig.23 It is a cross-sectional view of the filter element dirtiness warning assembly in the preferred embodiment 10 of the present invention;

[0066] Fig.24 It is a cross-sectional view of the filter element dirty prompt component in the preferred embodiment 10 of the present invention;

[0067] Fig.25 It is an exploded view of the prompt component in the preferred embodiment 11 of the present invention;

[0068] Fig.26 It is a cross-sectional view of the filter element dirtiness warning assembly in the preferred embodiment 11 of the present invention;

[0069] Fig. 27 It is a cross-sectional view of the filter element dirty prompt component in the preferred embodiment 11 of the present invention;

[0070] Fig.28 It is an exploded view of the prompt component in the preferred embodiment 12 of the present invention;

[0071] Fig.29 It is a cross-sectional view of the filter element dirtiness warning assembly in the preferred embodiment 12 of the present invention;

[0072] Fig.30 This is a state diagram of the filter element dirty warning component in the preferred embodiment 12 of the present invention.

[0073] Fig.31 It is a cross-sectional view of the filter element dirty prompt component in the preferred embodiment 12 of the present invention;

[0074] Fig.32This is a state diagram of the filter element dirtiness warning component in the preferred embodiment 12 of the present invention. DETAILED DESCRIPTION

[0075] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making creative work are within the scope of protection of the present invention.

[0076] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0077] In the description of the present invention, it should be noted that, unless otherwise clearly stipulated and limited, the terms "installed", "provided with", "mounted / connected", "connected", etc. should be understood in a broad sense. For example, "connection" can be a wall-mounted connection, a detachable connection, or an integral connection. It can be a mechanical connection or an electrical connection. It can be a direct connection or an indirect connection through an intermediate medium. It can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0078] Example 1

[0079] refer to Figure 1 and Figure 2 This embodiment provides a filter medium dirt prompt structure, including: a filter element 1, a prompt component 2; the prompt component 2 has a movable part, one end of the movable part is connected to the water inlet end of the filter element 1, and the other end is connected to the outside air;

[0080] When the filter element 1 becomes dirty, the filtering capacity of the filter element 1 decreases, so the pressure at the water inlet end increases. In this way, the water pressure at the water inlet end is greater than the air pressure, which drives the movable part to move, thereby changing the position of the movable part. The user only needs to observe the position of the movable part to know whether the current filter element 1 needs to be replaced due to dirt. The whole process is very intuitive and clear, and the cost of this solution is very low.

[0081] In this embodiment, the prompt component 2 includes a shell 21, an elastomer 22, a valve core 23 and an elastic bag 24; the valve core 23 is arranged at the movable end of the elastic bag 24 to form the movable part; the side of the elastic bag 24 away from the movable end is connected to the water inlet end; the elastic bag 24 and the valve core 23 are arranged in the shell 21, one end of the elastomer 22 is fixed to the inner wall of the shell 21, and the other end abuts the movable end of the elastic bag 24; the shell 21 is also provided with an exhaust hole 211 connected to the atmosphere.

[0082] When the filter element 1 is dirty, the filtering capacity of the filter element 1 decreases, so the pressure at the water inlet increases, and a pressure difference is formed at both ends of the valve core 23, which pushes the valve core 23 to move the compressed air, and part of the air enters the exhaust hole 211 and is discharged, so that the valve core 23 can move all the time, and the user can intuitively find that the position of the valve core 23 has changed. And when the valve core 23 moves, it squeezes the elastic body 22 to accumulate elastic reset force. When the user replaces the filter element 1, the water pressure at the water inlet decreases, and the valve core 23 will return to the initial position under the influence of the elastic reset force.

[0083] In this embodiment, in order to facilitate the user to observe the position of the valve core 23, an observation window is provided on the housing 21. Through the transparent observation window, the user can easily observe the position of the valve core 23.

[0084] In this embodiment, the valve core 23 is driven to move by the pressure increase at the water inlet. The prompt structure can also be installed at the water outlet, and the valve core 23 is driven to move by the characteristic that the flow rate at the water outlet decreases when the valve core 23 is dirty, so that the water pressure at the water outlet decreases. This is a simple replacement of this embodiment and will not be described in detail.

[0085] Example 2

[0086] refer to Figure 3 and Figure 4 In this embodiment, the prompt component 2 includes a shell 21, a valve core 23 and an elastomer 22. The valve core 23 is movably arranged in the shell 21 to form the movable part. One side of the valve core 23 is connected to the water inlet end, and the other side abuts against one end of the elastomer 22; the other end of the elastomer 22 is fixed on the inner wall of the shell 21.

[0087] The difference between Example 2 and Example 1 is that the elastic bag 24 is eliminated.

[0088] Example 3

[0089] refer to Figure 5 and Figure 6The prompt component 2 includes a shell 21, a valve core 23 and an elastic bag 24; the valve core 23 is arranged at the movable end of the elastic bag 24 to form the movable part; the side of the elastic bag 24 away from the movable end is connected to the water inlet end; the elastic bag 24 and the valve core 23 are arranged in the shell 21, one end of the elastomer 22 is fixed to the inner wall of the shell 21, and the other end abuts against the movable end of the elastic bag 24; the side of the valve core 23 away from the elastic bag 24 is connected to the water outlet end through the water inlet hole on the shell 21.

[0090] In this embodiment, the prompt component 2 is arranged between the water inlet and the water outlet, and the pressure difference is formed by utilizing the characteristics that the pressure at the water inlet increases and the pressure at the water outlet decreases when the valve core 23 is dirty. In this way, the pressure difference is more obvious, so the sensitivity is also higher.

[0091] Example 4

[0092] refer to Figure 7 and Figure 8 In this embodiment, the prompt component 2 includes a shell 21, a valve core 23 and an elastomer 22. The valve core 23 is movably arranged in the shell 21 to form the movable part. One side of the valve core 23 is connected to the water inlet end and abuts against one end of the elastomer 22; the other end of the elastomer 22 is fixed on the inner wall of the shell 21; the side of the valve core 23 away from the elastomer 22 is connected to the water outlet end through the water inlet hole on the shell 21.

[0093] The difference between Example 4 and Example 3 is that the elastic bag 24 is eliminated.

[0094] Example 5

[0095] refer to Fig. 9 and Fig.10 The prompt component 2 includes a housing 21, a valve core 23 and an elastic body 22; the valve core 23 is arranged at the movable end of the elastic body 22 to form the movable part; the side of the elastic body 22 away from the movable end is connected to the water inlet end; the elastic body 22 and the valve core 23 are arranged in the housing 21; one side of the valve core 23 is connected to the water outlet end through the water inlet hole on the housing 21; water flows out from the water outlet end through the valve core 23 from the water inlet hole, and the valve core 23 moves toward the water outlet hole under the action of the water flow. According to the pressure difference between the water inlet and the water outlet, the valve core 23 can be located at different positions.

[0096] The housing is provided with an indicator sticker 25 , and the valve core 23 covers different areas of the indicator sticker 25 when it is located at different positions.

[0097] By setting the indicator sticker, the user can more intuitively judge the use of the filter element 1. For example, different areas of the sticker can be set to different colors. If the green area is exposed, it means that the filter element 1 is still in a healthy state. If the yellow area is exposed, it means that the filter element 1 is a little dirty. If the red area is exposed, it means that the filter element 1 needs to be replaced. This method is simpler and clearer.

[0098] Example 6

[0099] refer to Fig.11 and Fig.12 In this embodiment, the prompt component 2 includes a housing 21, a valve core 23 and an elastic body 22; the valve core 23 is arranged at the movable end of the elastic body 22 to form the movable part; the side of the elastic body 22 away from the movable end is connected to the water inlet end; the elastic body 22 and the valve core 23 are arranged in the housing 21, one end of the valve core 23 is fixed to the inner wall of the housing 21, and the other end abuts against the movable end of the elastic body 22;

[0100] The side of the valve core 23 away from the elastic body 22 is connected to the water outlet through the water inlet hole on the housing 21;

[0101] The valve core 23 is provided with a magnet 26 , and the housing 21 is provided with a circuit board 27 ; the circuit board 27 determines the position of the valve core 23 according to the relative position with the magnet 26 , and sends out a prompt signal.

[0102] The prompt signal is a light signal or a sound signal or an APP reminder signal of the smart terminal. In this way, the user can know whether the filter element 1 needs to be replaced without observing the valve core 23, which is more convenient.

[0103] This embodiment also provides a filtering device having the filter medium dirt prompt structure as described above.

[0104] Example 7

[0105] refer to Figure 13-Figure 15 In this embodiment, the prompt component 2 includes: a pull rod 201, a convex bump 202 and a housing 203; the convex bump 202 is swingably connected to the pull rod 201 at an eccentric position; the housing 203 has an observation window for observing the position of the convex bump 202;

[0106] When the filter element is dirty, the two ends of the pull rod 201 move along their own axis due to the increase of water inlet pressure or the decrease of water outlet pressure, and pull the convex bump 202 to swing. In this way, the user only needs to observe the position of the convex bump 202 to know whether the filter element needs to be replaced due to dirt.

[0107] In order to achieve the connection between the bulge 202 and the pull rod 201, the bulge 202 is eccentrically provided with a first boss 2021, and the pull rod 201 is provided with a slot 2011 cooperating with the first boss 2021, and the slot 2011 extends in a direction perpendicular to the axial direction of the pull rod 201 itself; the bulge 202 is also provided with a second boss 2022 at the axis center, and the pull rod 201 is provided with a yield groove 2012 along its own axial direction; when the bulge 202 swings, the second boss 2022 moves in the yield groove 2012, and the first boss 2021 moves in the slot 2011.

[0108] In addition, in order to realize that the pull rod 201 can drive the convex bump 202 to automatically reset after the filter element is replaced, the pull rod 201 is connected to a reset elastic member 204; when the two ends of the pull rod 201 move along their own axis due to the increase in pressure at the water inlet end or the decrease in pressure at the water outlet end, the reset elastic member 204 is squeezed to accumulate elastic reset force. In this way, after the filter element is replaced, the pressure difference at the two ends of the pull rod 201 disappears, and the pull rod 201 automatically resets under the action of the reset elastic member 204, which also drives the convex bump 202 to automatically reset.

[0109] In this embodiment, the resetting elastic member 204 may be an elastic body or a telescopic elastic bag.

[0110] Example 8

[0111] refer to Figure 16-Figure 18 In this embodiment, the prompt component 2 includes a pull rod 201, a dial 205 and a housing 203; the housing 203 has an observation window for observing the relative position of the dial 205 and the housing 203;

[0112] The pull rod 201 and the dial 205 are connected via a reversing member, and the reversing member is used to convert the translation of the pull rod 201 along its own axis into the rotation of the dial 205 around its own axis;

[0113] When the filter element is dirty, the two ends of the pull rod 201 move along their own axis due to the increase of water inlet pressure or the decrease of water outlet pressure, and drive the dial 205 to rotate. The user can judge whether the filter element needs to be replaced due to dirt by observing the relative position of the dial 205 and the observation window.

[0114] In order to achieve the reversing effect, the dial 205 has a column 2051 that movably cooperates with the pull rod 201; the reversing member is a spiral guide rail 2052 set on the column and a slider 2011 set on the pull rod 201; the slider 2011 movably cooperates with the spiral guide rail 2051.

[0115] In order to automatically reset the dial 205 after the user replaces the filter element, the pull rod 201 is connected to a reset elastic member 204; when the two ends of the pull rod 201 move along their own axis due to the increase in pressure at the water inlet end or the decrease in pressure at the water outlet end, the reset elastic member 204 is squeezed to accumulate elastic reset force. In this way, after the filter element is replaced, the pressure difference at the two ends of the pull rod 201 disappears, and the pull rod 201 automatically resets under the action of the reset elastic member 204, which also drives the dial 205 to automatically reset.

[0116] In this embodiment, the resetting elastic member 204 may be an elastic body or a telescopic elastic bag.

[0117] Example 9

[0118] refer to Figure 19-21 In this embodiment, the prompt component 2 includes a tympanic membrane 206, a flow switch 207, a circuit board and a valve stem 208; one end of the valve stem 208 is linked to the convex surface of the tympanic membrane 206, and the flow switch 207 is fixed to the valve stem 208; a Hall element 209 is provided on the circuit board;

[0119] When the filter element is dirty, the convex surface of the eardrum 206 is flattened due to the increase in pressure at the water inlet or the decrease in pressure at the water outlet, driving the valve stem 208 and the flow switch 207 to move relative to the circuit board, so that the flow switch 207 cooperates with the Hall element 209.

[0120] This technical solution uses the fact that when the flow switch 207 and the Hall element 209 are aligned, the Hall element 209 will receive the characteristics of the electromagnetic signal, thereby identifying the flow switch 207 in different positions. However, after the Hall element 209 receives the electromagnetic signal, it can be considered that the filter element must be replaced because it is dirty, and a prompt signal for replacing the filter element is issued. By arranging multiple Hall elements 209, multiple prompt signals can be issued according to different positions of the flow switch 207, indicating that the filter element is clean, dirty, or must be replaced.

[0121] Example 10

[0122] refer to Figure 22-24 In this embodiment, the prompt component 2 includes a micro switch 210, a valve stem 208 and a reset elastic member 204; one end of the valve stem 208 is linked to the reset elastic member 204, and the other end is used to cooperate with the micro switch 210; when the filter element is dirty, the reset elastic member 204 is squeezed due to the increase in pressure at the water inlet end or the decrease in pressure at the water outlet end, driving the valve stem 208 to move to the second position, so that the other end of the valve stem 208 triggers the micro switch 210.

[0123] Embodiment 11

[0124] refer to Figure 25-27 The difference between this embodiment and embodiment 9 is that the prompt component 2 in embodiment 9 is arranged outside the filter device, one side of the prompt component 2 is connected to the water inlet of the filter device, and the other end is connected to the filter device through a hose. In this embodiment, the prompt component 2 is arranged inside the filter device and is located below the filter element.

[0125] Example 12

[0126] refer to Figure 28-Figure 32 The difference between this embodiment and embodiment 10 is that the prompt component 2 in embodiment 10 is arranged outside the filter device, one side of the prompt component 2 is connected to the water inlet of the filter device, and the other end is connected to the filter device through a hose. In this embodiment, the prompt component 2 is arranged inside the filter device and is located below the filter element.

[0127] The above is only a preferred specific implementation of the present invention, but the design concept of the present invention is not limited to this. Any technician familiar with the technical field who uses this concept to make non-substantial changes to the present invention within the technical scope disclosed by the present invention shall be deemed to infringe the protection scope of the present invention.

Claims

1. A filter medium dirt prompt structure, characterized in that include: Filter element, prompt component; The prompt component has a movable part, one end of which is connected to the water inlet or outlet of the filter element, and the other end of which is connected to the water outlet or inlet of the filter element or the outside air; When the filter element is dirty, the pressure at the water inlet end increases or the pressure at the water outlet end decreases, driving the movable part to move, so as to prompt the user to replace the filter element; The prompt assembly comprises: a pull rod, a convex bulge and a shell; the convex bulge is swingably connected to the pull rod at an eccentric position; the shell has an observation window for observing the position of the convex bulge, and the shell has a protrusion corresponding to the convex bulge; When the filter element is dirty, the two ends of the pull rod move along their own axis due to the increase of pressure at the water inlet end or the decrease of pressure at the water outlet end, and pull the convex bulge to swing; The convex bump is eccentrically provided with a first protrusion, and the pull rod is provided with a slot matched with the first protrusion, and the slot extends in a direction perpendicular to the axial direction of the pull rod itself; The convex bulge is also provided with a second convex column at the axis center, and the pull rod is provided with a clearance groove along its own axial direction; when the convex bulge swings, the second convex column moves in the clearance groove, and the first convex column moves in the clamping groove.

2. A filter medium dirt prompt structure according to claim 1, characterized in that: The pull rod is connected to a reset elastic member; when the two ends of the pull rod move along their own axis due to an increase in pressure at the water inlet end or a decrease in pressure at the water outlet end, the reset elastic member is squeezed to accumulate elastic reset force.

3. A filtering device, characterized in that The invention has the filter medium dirt prompting structure as described in any one of claims 1 to 2.

4. A filtering device according to claim 3, characterized in that: The prompt component is arranged outside the filtering device, one side of the prompt component is connected to the water inlet of the filtering device, and the other end is connected to the filtering device through a hose.

5. A filtering device according to claim 4, characterized in that: The prompt component is arranged in the filtering device and is located below the filter element.

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