Scale inhibitor and intelligent toilet

Abstract

The scale inhibitor comprises a shell, a first sealing assembly and a second sealing assembly, the shell is provided with a containing cavity and a water passing channel, the first sealing assembly comprises a first switching plug and a first elastic piece, and the second sealing assembly comprises a second switching plug and a second elastic piece; the first elastic piece and the second elastic piece are both made of shape memory alloy. The water flow path can be dynamically selected according to the water temperature, and self-adaptive control over the scale inhibition function is achieved. When the water inlet temperature of the water passing channel is higher than the phase change temperature of the shape memory alloy, the first switching plug and the second switching plug block the first water passing opening and the second water passing opening correspondingly, water does not flow through the containing cavity, and when the water inlet temperature of the water passing channel is lower than the phase change temperature of the shape memory alloy, water can enter the containing cavity. Water is softened after being in contact with the scale inhibitor and then flows out of the containing cavity, and the softened water discharges unsoftened water in the original pipeline, so that the formation of scale is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of scale inhibition equipment, and particularly to a scale inhibitor and an intelligent toilet bowl. Background Art

[0002] When the intelligent toilet bowl starts the cleaning function, it will heat the water through an instant heater, and after obtaining warm water, it will spray it on the human body. At this time, the water temperature in the waterway system is about 38°C or above. After the cleaning function ends, the toilet bowl will enter the self-cleaning state. At this time, the instant heater does not work, and cold water is used for self-cleaning. After that, some water will remain in the water pipeline, which is easy to form scale. Therefore, a scale inhibitor is connected to the waterway to reduce the formation of scale. However, the traditional scale inhibitor softens all water temperatures and water flows, and the higher the temperature, the greater the solubility of the scale inhibitor and the faster the consumption, which will lead to the meaningless consumption of the scale inhibitor for high-temperature water under the cleaning function. Summary of the Invention

[0003] The present invention aims to at least solve one of the above technical problems in the related art to some extent. For this purpose, the present invention provides a scale inhibitor that can realize water temperature self-sensing and path self-switching through the phase change characteristics of shape memory alloy.

[0004] To achieve the above object, the technical solution of the present invention is as follows:

[0005] The present invention also provides an intelligent toilet bowl with the above scale inhibitor.

[0006] The scale inhibitor according to the first aspect embodiment of the present invention includes:

[0007] A housing provided with a containing cavity for containing a scale inhibitor and a water passing channel. One end of the water passing channel is an inlet, and the other end is an outlet. First water passing openings and second water passing openings are sequentially formed in the side wall of the water passing channel along the water flow direction. The water flow in the water passing channel can flow into the containing cavity through the first water passing opening, and the water flow in the containing cavity can flow into the water passing channel through the second water passing opening;

[0008] A first sealing assembly disposed in the water passing channel, the first sealing assembly including a first switching plug and a first elastic member for driving the first switching plug to move;

[0009] A second sealing assembly disposed in the water passing channel, the second sealing assembly including a second switching plug and a second elastic member for driving the second switching plug to move. The materials of the first elastic member and the second elastic member are both shape memory alloy;

[0010] When the inlet water temperature of the water passing channel is higher than the phase change temperature of the shape memory alloy, the first switching plug can block the first water passing opening, and at the same time, the second switching plug can block the second water passing opening, so that the water passing channel is completely unblocked;

[0011] When the inlet water temperature of the water passage is lower than the phase transition temperature of the shape memory alloy, the first switching plug opens the first water inlet, and at the same time the second switching plug opens the second water inlet, and the first switching plug and / or the second switching plug can cut off the water passage, so that the water inlet, the first water inlet, the accommodating cavity, the second water inlet and the water outlet form a communicating waterway.

[0012] The scale inhibitor according to the embodiment of the present invention has at least the following beneficial effects:

[0013] 1. The present invention can dynamically select the water flow path according to the water temperature to realize the adaptive control of the scale inhibition function. The accommodating cavity is filled with scale inhibitor. When the inlet water temperature of the water passage is higher than the phase transition temperature of the shape memory alloy (such as when the cleaning function of the intelligent toilet is turned on), the first elastic member and the second elastic member are in the extended state, and the first switching plug and the second switching plug respectively block the first water inlet and the second water inlet, and the water does not flow through the scale inhibitor in the accommodating cavity and directly flows out, avoiding the heated water flowing through the scale inhibitor, and effectively avoiding the excessive consumption of the scale inhibitor by the high-temperature water; when the inlet water temperature of the water passage is lower than the phase transition temperature of the shape memory alloy (such as when the intelligent toilet is in the self-cleaning state), the first elastic member and the second elastic member are in the compressed state. At this time, the first switching plug and the second switching plug are pulled out to cut off the water passage, and at the same time the first water inlet and the second water inlet are opened, the water can enter the accommodating cavity through the first water inlet, the water is softened after contacting the scale inhibitor, and then flows out of the accommodating cavity through the second water inlet, and the softened water discharges the unsoftened water in the original pipeline, avoiding the formation of scale.

[0014] 2. The present invention does not require additional solenoid valves and control modules to switch the water circuit. Only by using the shape memory alloy to sense the change of the water temperature during the normal use of the intelligent toilet, the scale inhibition function can be automatically turned on and off, reducing the overall power consumption of the product.

[0015] According to some embodiments of the present invention, a first steering channel is provided in the first switching plug, and a second steering channel is provided in the second switching plug. When the inlet water temperature of the water passage is lower than the phase transition temperature of the shape memory alloy, the first steering channel communicates the water inlet with the accommodating cavity, and at the same time the second steering channel communicates the water outlet with the accommodating cavity.

[0016] According to some embodiments of the present invention, the water passing channel includes a first channel and a second channel. The first end of the first channel is the water inlet, the second end of the first channel communicates with the first end of the second channel, the second end of the second channel is the water outlet, the first water passing opening is formed on the side wall of the first channel, the second water passing opening is formed on the side wall of the second channel, the first sealing assembly is arranged in the first channel, and the second sealing assembly is arranged in the second channel.

[0017] According to some embodiments of the present invention, a first groove is provided on the inner wall of the first channel, the first groove is opposite to the first water passing opening, one end of the first elastic member is embedded in the first groove, and the other end is connected to the first switching plug. The first switching plug is embedded in the first water passing opening and can move along the axial direction of the first water passing opening; and / or, a second groove is provided on the inner wall of the second channel, the second groove is opposite to the second water passing opening, one end of the second elastic member is embedded in the second groove, and the other end is connected to the second switching plug. The second switching plug is embedded in the second water passing opening and can move along the axial direction of the second water passing opening.

[0018] According to some embodiments of the present invention, the housing includes a main housing, a water inlet cover and a water outlet cover. The main housing is a box body structure with an opening facing upwards. The inner cavity of the main housing is the accommodating cavity. The first channel is formed on the water inlet cover, the second channel is formed on the water outlet cover, and the water inlet cover or the water outlet cover is covered on the opening of the main housing.

[0019] According to some embodiments of the present invention, a through hole is provided on the side wall of the main housing. The water inlet cover is closely attached to the side wall of the main housing, and the through hole is opposite to the first water passing opening. The water outlet cover is covered on the opening of the main housing.

[0020] According to some embodiments of the present invention, a first sealing ring is provided at the connection between the water outlet cover and the main housing. A second sealing ring is provided between the side wall of the main housing and the water inlet cover, and the second sealing ring is arranged along the outer circumference of the through hole. A third sealing ring is provided at the joint between the first channel and the second channel.

[0021] According to some embodiments of the present invention, the first turning channel is L-shaped and is composed of a first parallel segment parallel to the axis of the first channel and a first vertical segment perpendicular to the axis of the first channel. The outlet of the first vertical segment is opposite to the through hole; and / or, the second turning channel is L-shaped and is composed of a second parallel segment parallel to the axis of the second channel and a second vertical segment perpendicular to the axis of the second channel. The inlet of the second vertical segment is opposite to the opening.

[0022] According to some embodiments of the present invention, the phase change temperature of the shape memory alloy is 25°C - 38°C.

[0023] The intelligent toilet according to the embodiment of the second aspect of the present invention includes the scale inhibitor.

[0024] The additional aspects and advantages of the present invention will be partially given in the following description, partially become apparent from the following description, or be understood through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The above and / or additional aspects and advantages of the present invention will become apparent and be readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0026] Figure 1 is a schematic diagram of the overall structure of the scale inhibitor of the present invention;

[0027] Figure 2 is an exploded view of the scale inhibitor of the present invention;

[0028] Figure 3 is a schematic diagram of the structure of the scale inhibitor under high-temperature water conditions of the present invention;

[0029] Figure 4 is a schematic diagram of the structure of the scale inhibitor under low-temperature water conditions of the present invention;

[0030] Figure 5 is Figure 4 a partial enlarged view of part A in

[0031] Reference numerals: main housing 100, accommodation cavity 110, opening 120, through hole 130, water inlet cover 200, first channel 210, water inlet 211, first water passing port 212, first groove 213, water outlet cover 300, second channel 310, water outlet 311, second water passing port 312, second groove 313, first sealing assembly 400, first switching plug 410, first steering channel 411, first parallel section 412, first vertical section 413, first elastic member 420, second sealing assembly 500, second switching plug 510, second steering channel 511, second elastic member 520, first sealing ring 600, second sealing ring 700, third sealing ring 800, scale inhibitor 900. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0032] The embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the drawings, in which the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0033] Refer toFigures 1-5 , a scale inhibitor, comprising:

[0034] A housing, provided with a receiving cavity 110 for accommodating a scale inhibitor and a water passage. One end of the water passage is an inlet 211, and the other end is an outlet 311. First water inlets 212 and second water inlets 312 are sequentially formed in the side wall of the water passage along the water flow direction. The water flow in the water passage can flow into the receiving cavity 110 through the first water inlet 212, and the water flow in the receiving cavity 110 can flow into the water passage through the second water inlet 312;

[0035] A first sealing assembly 400, disposed in the water passage. The first sealing assembly 400 includes a first switching plug 410 and a first elastic member 420 for driving the first switching plug 410 to move;

[0036] A second sealing assembly 500, disposed in the water passage. The second sealing assembly 500 includes a second switching plug 510 and a second elastic member 520 for driving the second switching plug 510 to move. The materials of the first elastic member 420 and the second elastic member 520 are both shape memory alloys. The shape memory alloy has two states: elongation and compression. When the temperature reaches its phase transition temperature, the elastic member can directly switch between the two states. For example, titanium-nickel-based shape memory alloys, copper-based shape memory alloys, and iron-based shape memory alloys are all typical two-way shape memory alloys. The shape memory alloy of the present invention is preferably a nickel-titanium-copper memory alloy, which has good phase transition reversibility and long fatigue life. The first elastic member 420 and the second elastic member 520 can be springs or elastic sheets;

[0037] When the inlet water temperature of the water passage is higher than the phase transition temperature of the shape memory alloy, the first elastic member 420 elongates and pushes the first switching plug 410 towards the first water inlet 212, so that the first switching plug 410 can block the first water inlet 212. At the same time, the second elastic member 520 elongates and pushes the second switching plug 510 towards the second water inlet 312, so that the second switching plug 510 can block the second water inlet 312, so that the water passage is completely unblocked;

[0038] When the inlet water temperature of the water passage is lower than the phase transition temperature of the shape memory alloy, the first elastic member 420 compresses and pulls the first switching plug 410 away from the first water inlet 212, thereby opening the first water inlet 212. At the same time, the second elastic member 520 compresses and pulls the second switching plug 510 away from the second water inlet 312, thereby opening the second water inlet 312, and the first switching plug 410 and / or the second switching plug 510 can block the water passage, so that the inlet 211, the first water inlet 212, the receiving cavity 110, the second water inlet 312, and the outlet 311 form a communicating waterway.

[0039] An intelligent toilet, comprising the above-mentioned scale inhibitor.

[0040] In some embodiments of the present invention, a first steering channel 411 is provided in the first switching plug 410, and a second steering channel 511 is provided in the second switching plug 510. When the inlet water temperature of the water passage is lower than the phase transition temperature of the shape memory alloy, the first steering channel 411 communicates the water inlet 211 with the accommodating cavity 110, and at the same time the second steering channel 511 communicates the water outlet 311 with the accommodating cavity 110. When the cleaning function of the intelligent toilet is turned on, the instant water heater of the intelligent toilet starts to work. At this time, the water temperature in the water circuit system is 38 °C or above, and at this time the temperature is greater than the phase transition temperature of the shape memory alloy. The first elastic member 420 and the second elastic member 520 are in an extended state. As Figure 3 shown, the first switching plug 410 and the second switching plug 510 respectively block the first water passing port 212 and the second water passing port 312, and water does not flow through the scale inhibitor 900 in the accommodating cavity 110 and directly flows out without consuming the scale inhibitor 900; after the cleaning function of the intelligent toilet is turned off, the instant water heater of the intelligent toilet stops working. At this time, the water temperature in the water circuit system is room temperature (about 25 °C or below), and this temperature is less than the phase transition temperature of the shape memory alloy. The first elastic member 420 and the second elastic member 520 are in a compressed state. At this time, the first switching plug 410 and the second switching plug 510 are pulled out, and the first steering channel 411 and the second steering channel 511 are respectively communicated with the water inlet 211 and the water outlet 311. Water can enter the accommodating cavity 110 through the first steering channel 411. After the water contacts the scale inhibitor 900, it is softened, and then flows out of the accommodating cavity 110 through the second steering channel 511. The softened water discharges the unsoftened water in the original pipeline, avoiding the formation of water scale.

[0041] In some embodiments of the present invention, the water passage includes a first channel 210 and a second channel 310. The first end of the first channel 210 is the water inlet 211, the second end of the first channel 210 is communicated with the first end of the second channel 310, the second end of the second channel 310 is the water outlet 311, the first water passing port 212 is opened on the side wall of the first channel 210, the second water passing port 312 is opened on the side wall of the second channel 310, the first sealing assembly 400 is arranged in the first channel 210, and the second sealing assembly 500 is arranged in the second channel 310. The water passage can be an integral design or a split design. The split design can simplify the mold design and reduce the processing difficulty. For example, in this embodiment, the first channel 210 and the second channel 310 can be processed separately and then sealed and connected.

[0042] In some embodiments of the present invention, a first groove 213 is provided on the inner wall of the first channel 210. The first groove 213 is opposite to the first water inlet 212. One end of the first elastic member 420 is embedded in the first groove 213, and the other end is connected to the first switching plug 410. The first switching plug 410 is embedded in the first water inlet 212 and can move axially along the first water inlet 212; and / or, a second groove 313 is provided on the inner wall of the second channel 310. The second groove 313 is opposite to the second water inlet 312. One end of the second elastic member 520 is embedded in the second groove 313, and the other end is connected to the second switching plug 510. The second switching plug 510 is embedded in the second water inlet 312 and can move axially along the second water inlet 312. The groove ensures that the mechanical action direction of the elastic member (elongation / contraction) during temperature change is strictly along the axial direction of the water inlet, avoiding radial offset or jamming caused by installation deviation, and ensuring the linearity and stability of the movement of the switching plug. The switching plug is made of silica gel. The switching plug is embedded in the water inlet, and the outer peripheral wall of the switching plug forms a sealing fit with the inner wall of the water inlet to prevent high-temperature water from entering the accommodating cavity. It should be noted that whether in the water passing state or the non-water passing state, the switching plug is embedded in the water inlet, but only the embedding depth is different according to the expansion and contraction length of the elastic member, ensuring that the movement of the switching plug is always along the axial direction of the water inlet and will not deviate from the axial direction to cause jamming or misalignment between the turning channel and the water inlet.

[0043] In some embodiments of the present invention, the housing includes a main housing 100, a water inlet cover 200, and a water outlet cover 300. The main housing 100 has a box body structure with an opening 120 facing upward. The inner cavity of the main housing 100 is an accommodating cavity 110. The first channel 210 is formed on the water inlet cover 200, and the second channel 310 is formed on the water outlet cover 300. The water inlet cover 200 or the water outlet cover 300 is covered on the opening 120 of the main housing 100. The water inlet cover 200 or the water outlet cover 300 is covered on the opening 120 of the main housing 100 to form a detachable connection. When it is necessary to replace or supplement the scale inhibitor 900 in the accommodating cavity 110, only the corresponding lid needs to be opened, without disassembling the entire scale inhibitor, reducing the user's maintenance cost. The split design is also convenient for production and assembly. The main housing 100, the water inlet cover 200, and the water outlet cover 300 can be mass-produced by processes such as injection molding respectively, simplifying the mold design and reducing the processing difficulty.

[0044] In some embodiments of the present invention, a through hole 130 is provided on the side wall of the main housing 100. The water inlet cover 200 is closely attached to the side wall of the main housing 100. The through hole 130 is aligned with the first water inlet 212. The water outlet cover 300 is covered on the opening 120 of the main housing 100. The diameter of the through hole 130 is slightly larger than that of the first water inlet 212. When the first elastic member 420 elongates, a part of the first switching plug 410 can extend into the through hole 130 without obstruction. The through hole 130 is aligned with the first water inlet 212, and the water flow path is smooth when passing through, reducing the resistance loss caused by elbows or misalignment, and the structure is more compact.

[0045] In some embodiments of the present invention, a first sealing ring 600 is provided at the connection between the water outlet cover 300 and the main housing 100, a second sealing ring 700 is provided between the side wall of the main housing 100 and the water inlet cover 200, and the second sealing ring 700 is disposed along the outer periphery of the through hole 130. A third sealing ring 800 is provided at the joint of the first channel 210 and the second channel 310. The first sealing ring 600 prevents the liquid in the accommodating cavity 110 from leaking through the top opening 120, ensuring that the water flow can only flow out of the accommodating cavity 110 through the second water passing port 312. The second sealing ring 700 prevents the water flow at the water inlet 211 from leaking through the gap between the main housing 100 and the water inlet cover 200, ensuring that the low-temperature water flow can only enter the accommodating cavity 110 through the first water passing port 212. The third sealing ring 800 prevents the water flow from leaking at the joint of the two channels.

[0046] In some embodiments of the present invention, the first turning channel 411 is L-shaped and is composed of a first parallel section 412 parallel to the axis of the first channel 210 and a first vertical section 413 perpendicular to the axis of the first channel 210. The outlet of the first vertical section 413 faces the through hole 130; and / or, the second turning channel 511 is L-shaped and is composed of a second parallel section parallel to the axis of the second channel 310 and a second vertical section perpendicular to the axis of the second channel 310. The inlet of the second vertical section faces the opening 120. In the first turning channel 411, water flows from the inlet of the first parallel section 412 to the outlet of the first vertical section 413; in the second turning channel 511, water flows from the inlet of the second vertical section to the outlet of the second parallel section. When the first switching plug 410 does not move (high-temperature state, the first elastic member 420 extends), most of the first switching plug 410 is embedded in the first water passing port 212. At this time, the inlet of the first parallel section 412 is blocked by the inner wall of the first water passing port 212 and is completely staggered from the first channel 210, and the water flow cannot enter the first turning channel 411. When the first switching plug 410 retracts (low-temperature state, the first elastic member 420 contracts), the inlet of the first parallel section 412 moves with the first switching plug 410 to align with the first channel 210, forming a complete water flow path of "water inlet 211 → first channel 210 → first parallel section 412 → first vertical section 413 → through hole 130 → accommodating cavity 110". The function of the second turning channel 511 is similar to that of the first turning channel 411. In the low-temperature state, a water flow path of "accommodating cavity 110 → second vertical section → second parallel section → second channel 310 → water outlet 311" is formed.

[0047] In some embodiments of the present invention, the phase transition temperature of the shape memory alloy is 25°C - 38°C. Considering the usage scenario of the intelligent toilet product, when the cleaning function is turned on, the instant heater component of the intelligent toilet starts to work and heats the water, and at this time the temperature of the cleaning water is 38°C or above; when the cleaning function ends, the instant heater stops working, and at this time the intelligent toilet performs the self-cleaning function of the spray gun, and the water outlet temperature is normal temperature, generally not exceeding 25°C. Therefore, a shape memory alloy with a phase transition temperature between 25°C and 38°C can be selected. The shape memory alloy of the present invention is preferably a nickel-titanium-copper memory alloy.

[0048] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the claims and their equivalents.

Claims

1. A scale inhibitor, characterized in that: include: A shell body, provided with a containing cavity (110) for containing a scale inhibitor and a water passage, one end of the water passage being a water inlet (211), and the other end being a water outlet (311), a side wall of the water passage being provided with a first water passage (212) and a second water passage (312) in sequence along a water flow direction, water flow in the water passage can flow into the containing cavity (110) through the first water passage (212), and water flow in the containing cavity (110) can flow into the water passage through the second water passage (312); A first sealing assembly (400) is disposed in the water passage, wherein the first sealing assembly (400) comprises a first switching plug (410) and a first elastic member (420) for driving the first switching plug (410) to move; A second sealing component (500) is disposed in the water passage, the second sealing component (500) comprising a second switching plug (510) and a second elastic member (520) for driving the second switching plug (510) to move, the first elastic member (420) and the second elastic member (520) being made of shape memory alloy; When the water inlet temperature of the water passage is higher than the phase transition temperature of the shape memory alloy, the first switching plug (410) can block the first water outlet (212), and the second switching plug (510) can block the second water outlet (312), so that the water passage is fully ventilated; When the water inlet temperature of the water passage is lower than the phase transition temperature of the shape memory alloy, the first switching plug (410) opens the first water outlet (212), and the second switching plug (510) opens the second water outlet (312), and the first switching plug (410) and / or the second switching plug (510) can cut off the water passage, so that the water inlet (211), the first water outlet (212), the accommodating chamber (110), the second water outlet (312) and the water outlet (311) form a connected waterway.

2. The scale inhibitor according to claim 1, characterized in that: A first turning channel (411) is provided in the first switching plug (410), and a second turning channel (511) is provided in the second switching plug (510). When the water inlet temperature of the water passage is lower than the phase change temperature of the shape memory alloy, the first turning channel (411) is connected to the water inlet (211) and the accommodating chamber (110), and the second turning channel (511) is connected to the water outlet (311) and the accommodating chamber (110).

3. The scale inhibitor according to claim 2, characterized in that: The water passage comprises a first channel (210) and a second channel (310); the first end of the first channel (210) is the water inlet (211); the second end of the first channel (210) is connected to the first end of the second channel (310); the second end of the second channel (310) is the water outlet (311); the first water passage (212) is provided on a side wall of the first channel (210); the second water passage (312) is provided on a side wall of the second channel (310); the first sealing assembly (400) is provided in the first channel (210); and the second sealing assembly (500) is provided in the second channel (310).

4. The scale inhibitor according to claim 3, characterized in that: The inner wall of the first channel (210) is provided with a first groove (213), the first groove (213) is opposite to the first water outlet (212), one end of the first elastic member (420) is embedded in the first groove (213), and the other end is connected to the first switching plug (410), the first switching plug (410) is embedded in the first water outlet (212), and can move along the axial direction of the first water outlet (212); and / or, the inner wall of the second channel (310) is provided with a second groove (313), the second groove (313) is opposite to the second water outlet (312), one end of the second elastic member (520) is embedded in the second groove (313), and the other end is connected to the second switching plug (510), the second switching plug (510) is embedded in the second water outlet (312), and can move along the axial direction of the second water outlet (312).

5. The scale inhibitor according to claim 3, characterized in that: The shell comprises a main shell (100), a water inlet cover (200) and a water outlet cover (300); the main shell (100) is a box structure with an opening (120) facing upward; the inner cavity of the main shell (100) is the accommodating cavity (110); the first channel (210) is formed on the water inlet cover (200); the second channel (310) is formed on the water outlet cover (300); and the water inlet cover (200) or the water outlet cover (300) is covered on the opening (120) of the main shell (100).

6. The scale inhibitor according to claim 5, characterized in that: The side wall of the main shell (100) is provided with a through hole (130), the water inlet cover (200) is closely attached to the side wall of the main shell (100), the through hole (130) is directly opposite to the first water outlet (212), and the water outlet cover (300) is covered on the opening (120) of the main shell (100).

7. The scale inhibitor according to claim 6, characterized in that: A first sealing ring (600) is provided at the connection between the water outlet cover (300) and the main shell (100), a second sealing ring (700) is provided between the side wall of the main shell (100) and the water inlet cover (200), and the second sealing ring (700) is arranged along the outer periphery of the through hole (130), and a third sealing ring (800) is provided at the junction of the first channel (210) and the second channel (310).

8. The scale inhibitor according to claim 6, characterized in that: The first turning channel (411) is L-shaped, and is composed of a first parallel section (412) parallel to the axis of the first channel (210) and a first vertical section (413) perpendicular to the axis of the first channel (210), and the outlet of the first vertical section (413) is opposite to the through hole (130); and / or, the second turning channel (511) is L-shaped, and is composed of a second parallel section parallel to the axis of the second channel (310) and a second vertical section perpendicular to the axis of the second channel (310), and the inlet of the second vertical section is opposite to the opening (120).

9. The scale inhibitor according to claim 1, characterized in that: The phase transition temperature of the shape memory alloy is 25°C-38°C.

10. A smart toilet, characterized in that: The scale inhibitor comprises the scale inhibitor described in any one of claims 1 to 9.

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