Water tank assembly and household appliance

Abstract

The water tank assembly comprises a water tank, a filtering assembly, a driving component and a liquid level sensor used for detecting the water level in the water tank, the water tank is provided with a water adding hole and a water draining hole, the filtering assembly is arranged in the water tank, and the driving component is arranged in the water tank. The filtering assembly is arranged in the water tank and used for filtering water added into the water tank from the water adding hole, the filtered water is discharged out of the water tank from the water discharging hole, the liquid level sensor is connected with the driving part so as to transmit a monitored signal of the water level in the water tank to the driving part, the driving part is connected with the filtering assembly, and the filtering assembly is connected with the driving part. The filter assembly is driven to move up and down in the water tank along with the change of the water level in the water tank according to the received water level signal, and the filter assembly is always higher than the water surface in the water tank. The water tank assembly is high in filtering efficiency, good in filtering effect and not prone to secondary pollution.

Description

Technical Field

[0001] The utility model relates to a water tank assembly and a household appliance having the water tank assembly. Background Art

[0002] The water tank of a household appliance such as a humidifier is usually provided with a filtering structure to filter impurities in the water, reduce the adverse effects of impurities in the water on the water path and the water mist path, such as blockage, and avoid problems such as bacterial growth.

[0003] In related art, the filter structure is typically fixed at the water outlet at the bottom of the water tank or inside the water tank. Since the filter structure is fixed at the bottom of the water tank or inside the water tank, the filter structure is constantly immersed in water, and impurities in the filter structure can easily lead to secondary contamination of the water. In addition, in related art, the filter structure is fixed at the bottom of the water tank or inside the water tank, which is difficult to install and remove, inconvenient to replace, and the water in the water tank must be drained during replacement, resulting in water waste. Utility Model Content

[0004] The present invention aims to solve one of the technical problems in the related art at least to a certain extent. To this end, an embodiment of the present invention provides a water tank assembly that can avoid secondary contamination.

[0005] The embodiment of the present utility model further provides a household appliance having the water tank assembly of the above embodiment.

[0006] The water tank assembly of the embodiment of the present utility model includes a water tank, a filter assembly, a driving component and a liquid level sensor for detecting the water level in the water tank. The water tank has a water filling hole and a drain hole. The filter assembly is arranged in the water tank and is used to filter the water added to the water tank from the water filling hole, and the filtered water is discharged from the water tank from the drain hole. The liquid level sensor is connected to the driving component to transmit the signal of the monitored water level in the water tank to the driving component. The driving component is connected to the filter assembly to drive the filter assembly to move up and down in the water tank according to the received water level signal as the water level in the water tank changes. The filter assembly is always higher than the water surface in the water tank.

[0007] The water tank assembly of the embodiment of the utility model monitors the water level in the water tank in real time through a liquid level sensor and drives the filter assembly to move in the up and down directions through a driving component, ensuring that the filter assembly is always higher than the water surface in the water tank, avoiding secondary contamination of the filtered water by impurities in the filter assembly, ensuring the filtering effect, and having a simple operation process and high accuracy.

[0008] Optionally, the liquid level sensor includes a sensing element and a float, the sensing element is arranged in the water tank and extends in the up and down directions, the float is slidably arranged on the sensing element, and the float moves up and down along the sensing element according to the change of the water level in the water tank by buoyancy.

[0009] In the water tank assembly of the embodiment of the present invention, the float moves up and down along the sensing element as the water level in the water tank changes, thereby realizing real-time monitoring of the water level in the water tank and improving accuracy. The sensing element can guide the float, and the movement of the float is smooth and reliable.

[0010] Optionally, the filter assembly is provided with a through hole, the sensing element passes through the through hole, and the filter assembly and the sensing element are in sliding cooperation.

[0011] The water tank assembly of the embodiment of the utility model, the filter assembly and the sensing element slide together, and the sensing element guides the filter assembly. The filter assembly is not easily deflected during movement, thereby achieving large-area filtration and improving filtration efficiency. Unfiltered water is not easily overflowed from between the inner circumference of the through hole and the outer circumference of the sensing element, thereby ensuring the filtration effect.

[0012] Optionally, the liquid level sensor is a float type water level sensor, a pulse type water level sensor, an ultrasonic type water level sensor, a pressure type water level sensor, an optical type water level sensor, a resistive type water level sensor or a capacitive type water level sensor.

[0013] The water tank assembly of the embodiment of the utility model can conveniently select a liquid level sensor according to specific applications, thereby improving applicability.

[0014] Optionally, the driving component includes a screw and an actuator, the screw is arranged in the water tank and extends in the up and down directions, the filter assembly is passed through the screw and cooperates with the screw thread, and the actuator is connected to at least part of the screw to drive the screw to rotate around the up and down directions, thereby driving the filter assembly to move in the up and down directions.

[0015] The water tank assembly of the embodiment of the utility model drives the screw to rotate in the up and down directions through the actuator to move the filter assembly along the extension direction of the screw, ensuring that the filter assembly is located above the water surface in the water tank. The structure of the actuator is simplified, the operation is convenient, and the cost is saved.

[0016] Optionally, the outer peripheral contour of the filter assembly is adapted to the outer peripheral contour of the inner cavity of the water tank, and the outer peripheral wall of the filter assembly is in contact with the inner peripheral wall of the water tank.

[0017] The water tank assembly of the embodiment of the utility model increases the filtering area of ​​the filter assembly for water, realizes large-area filtration, and improves the filtering efficiency. The outer peripheral wall of the filter assembly fits with the inner peripheral wall of the water tank, making it difficult for water to bypass the filter assembly, thereby ensuring the filtering effect.

[0018] Optionally, the actuator is a motor.

[0019] The water tank assembly of the embodiment of the utility model has an actuator that is simple to operate and easy to use.

[0020] Optionally, the filter assembly includes a filter housing and a filter core body arranged in the filter housing, the filter housing includes an upper cover and a lower cover, the upper cover is provided with a water inlet hole, the lower cover is provided with a water outlet hole, the upper cover and the lower cover are detachably connected to enclose a filter cavity, the filter core body is arranged in the filter cavity, and the filter core body includes a filter mesh and filter particles.

[0021] The water tank assembly of the embodiment of the utility model has an upper cover and a lower cover that are detachably connected, making it easy to install and replace the filter core. The filter screen and the filter core filter together to ensure the filtering effect. Moreover, the filter assembly has a simple structure and low cost.

[0022] The household appliance of the embodiment of the present invention includes the water tank assembly described in any one of the above embodiments.

[0023] The household appliance of the embodiment of the present utility model has a good filtering effect and high filtering efficiency in the water tank assembly, thereby improving the efficiency of water filtering of the household appliance and ensuring that the filtered water is not easily contaminated by secondary pollution.

[0024] Optionally, the household appliance is a humidifier, and the water tank assembly further includes a mist outlet duct and a mist outlet cap. The water tank includes a box body and a box cover. The mist outlet duct is arranged in the box body, the mist outlet cap is provided with a mist outlet hole, and the box cover is provided with a connecting hole. The mist outlet cap is installed on the box cover, and the lower end of the mist outlet cap fits in the connecting hole. The upper end of the mist outlet duct is connected to the lower end of the mist outlet cap through a seal, and the filter assembly is slidably fitted with the outer peripheral surface of the mist outlet duct.

[0025] In the household appliance of the embodiment of the utility model, the filter assembly and the mist outlet duct are slidably matched, so that the filter assembly is not easily deflected when it moves up and down with the water level, thereby improving the filtering efficiency. The setting of the seal ensures that unfiltered water on the box cover is not easy to enter the mist outlet duct. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is an exploded schematic diagram of the water tank assembly of an embodiment of the present utility model.

[0027] Figure 2It is a cross-sectional view of a water tank assembly according to an embodiment of the present utility model.

[0028] Figure 3 It is a schematic diagram of the filter assembly of the water tank assembly according to an embodiment of the present utility model.

[0029] Figure 4 yes Figure 2 Enlarged schematic diagram of part A.

[0030] Figure 5 yes Figure 2 Schematic diagram of the enlarged portion B.

[0031] Figure 6 yes Figure 3 Enlarged schematic diagram of part C.

[0032] Figure 7 It is a schematic diagram of the upper cover of the water tank assembly according to an embodiment of the present utility model.

[0033] Figure 8 It is a schematic diagram of the lower cover of the water tank assembly according to an embodiment of the present utility model.

[0034] Figure 9 It is a schematic diagram of the bottom surface of the lower cover of the water tank assembly according to an embodiment of the present utility model.

[0035] Figure 10 Schematic diagram of a household appliance according to an embodiment of the present invention.

[0036] Figure numerals: 100, water tank assembly; 200, household appliance; 1, water tank; 11, water filling hole; 12, box body; 13, box cover; 14, connecting hole; 2, filter assembly; 21, filter housing; 211, upper cover; 2111, water inlet; 2112, extension; 2113, upper cover; 21131, first perforation; 2114, first inner flange; 2115, first outer flange; 2116, elastic tongue; 21161, slot; 2117, inner lower extension; 2118, outer lower extension; 21191, third perforation; 21192, first recess; 212, lower cover; 2121, water outlet; 2122, lower cover; 21221, second perforation; 2123, second inner flange ;2124, second outer flange;2125, inner upper extension;2126, outer upper extension;2127, groove;2128, cam;21291, first convex portion;21292, fourth through-hole;21293, second recess;21294, second convex portion;213, filter cavity;22, filter core;221, filter screen;222, filter particles;3, driving component;31, screw;32, actuator;33, sealing ring;4, liquid level sensor;41, sensing element;411, sensing plate;412, mounting part;4121, mounting position;42, float;421, main body;422, through-hole;5, base;6, mist outlet duct;7, mist outlet cap;71, mist outlet hole;8, sealing part. DETAILED DESCRIPTION

[0037] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0038] like Figure 1-10 As shown, the present invention provides a water tank assembly and a household appliance having the water tank assembly. It is understandable that the water tank assembly of this embodiment is not limited to being used in household appliances, but can also be used in other devices and occasions having similar water tank assemblies.

[0039] The water tank assembly of the embodiment of the utility model is first described below.

[0040] like Figure 1-2As shown, the water tank assembly 100 of the embodiment of the present invention includes a water tank 1, a filter assembly 2, a drive component 3 and a liquid level sensor 4. The liquid level sensor 4 is used to detect the water level in the water tank 1. The water tank 1 has a water inlet 11 and a drain hole (not shown). The filter assembly 2 is arranged in the water tank 1. The filter assembly 2 is used to filter the water added to the water tank 1 from the water inlet 11, and the filtered water is discharged from the water tank 1 from the drain hole. The liquid level sensor 4 is connected to the drive component 3 to transmit the signal of the monitored water level in the water tank 1 to the drive component 3. The drive component 3 is connected to the filter assembly 2 to drive the filter assembly 2 to move up and down in the water tank 1 according to the received water level signal as the water level in the water tank 1 changes, so that the filter assembly 2 is always higher than the water surface in the water tank 1.

[0041] In the water tank assembly of the present embodiment, the liquid level sensor 4 monitors the water level in the water tank 1 in real time. The driving component 3 drives the filter assembly 2 to move in the vertical direction based on the received water level signal, ensuring that the filter assembly 2 is always above the water surface in the water tank 1, preventing impurities in the filter assembly 2 from secondary contaminating the filtered water and ensuring the filtration effect. The provision of the liquid level sensor 4 improves the accuracy of monitoring the water level in the water tank 1, thereby ensuring that the filter assembly 2 is always above the water surface. Moreover, the operation process is simple, saving time and effort, and reducing costs.

[0042] like Figure 2 As shown, the liquid level sensor 4 includes a sensing element 41 and a float 42. The sensing element 41 is disposed in the water tank 1 and extends in the vertical direction. The float 42 is slidably disposed on the sensing element 41. The float 42 relies on buoyancy to move up and down along the sensing element 41 as the water level in the water tank 1 changes. Preferably, the float 42 is sleeved on the sensing element 41 and located below the filter assembly 2. The float moves up and down along the sensing element as the water level in the water tank changes, enabling real-time monitoring of the water level in the water tank and improving accuracy. The sensing element 41 can guide the float 42, ensuring smooth and reliable movement of the float 42.

[0043] The float 42 is slidably mounted on the outer periphery of the sensing element 41, and the inner periphery of the float 42 matches the outer periphery of the sensing element 41. The float 42 can be made of a buoyant material, such as a plastic material or a foam material.

[0044] In some specific examples, such as Figure 5As shown, float 42 is a magnetic float. For example, float 42 includes a body 421 and a magnetic body embedded within body 421. Body 421 is made of a buoyant material, allowing float 42 to float on the water surface. Body 421 has a through-hole 422, through which body 421 is attached to sensing element 41. Sensing element 41 may include a sensing plate 411 and a mounting member 412. Mounting member 412 extends vertically within water tank 1. Mounting member 412 has a mounting position 4121 extending vertically. Sensing plate 411 is positioned within mounting position 4121. Sensing plate 411 may be provided with multiple pairs of spaced-apart metal springs (not shown). Each pair of metal springs is opposed and spaced apart. When the metal springs sense the magnetic field of float 42, they become magnetized by the magnetic field, causing the two metal springs to mate, thereby detecting the water level within water tank 1. It will be appreciated that the operating principle of these metal springs is similar to that of a reed switch.

[0045] Specifically, the operation process of the float 42 and the sensing element 41 is as follows: the float 42 moves up and down along the sensing element 41 under the action of the buoyancy of water. When the float 42 approaches the metal shrapnel during the movement, the magnetic field generated by the float 42 also gradually approaches the metal shrapnel. When the float 42 is facing the metal shrapnel, the metal shrapnel is most affected by the magnetic field. The metal shrapnel adhere to each other and generate signals. After receiving the signal, the actuator 32 drives the screw 31 to rotate, so as to drive the filter assembly 2 to move in the up and down directions, ensuring that the filter assembly 2 is always located above the float 42.

[0046] Optionally, the sensing element 41 is not limited to sensing the position of the float 42 through a magnetic field. For example, the position of the float 42 may also be sensed through other means such as light or pulses.

[0047] In some embodiments, the liquid level sensor 4 can be a float-type water level sensor, a pulse-type water level sensor, an ultrasonic water level sensor, a pressure-type water level sensor, an optical water level sensor, a resistive water level sensor, or a capacitive water level sensor. Depending on the specific application, the water level sensor can be conveniently selected, thereby improving applicability. For example, the water level sensor 4 can be a pressure-type water level sensor, which is disposed within the water tank 1 and calculates the water level within the water tank 1 by measuring the pressure of the water within the water tank 1.

[0048] Optionally, the filter assembly is provided with a through-hole (not shown), through which the sensing element 41 passes. The filter assembly 2 and the sensing element 41 slide together, and the sensing element 41 guides the filter assembly 2, making it less likely to deflect during movement. This allows for large-area filtration and improves filtration efficiency. The inner circumference of the through-hole matches the outer circumference of the sensing element 41, reducing the risk of unfiltered water overflowing between the inner circumference of the through-hole and the outer circumference of the sensing element 41, thereby ensuring effective filtration.

[0049] like Figure 2 As shown, the driving component 3 includes a screw 31 and an actuator 32. The screw 31 is arranged in the water tank 1 and extends in the up and down directions. The filter assembly 2 is passed through the screw 31 and threadedly engaged with the screw 31. The actuator 32 is connected to at least a portion of the screw 31 to drive the screw 31 to rotate in the up and down directions, thereby driving the filter assembly 2 to move in the up and down directions.

[0050] Specifically, the actuator 32 is located at the bottom of the water tank 1, and the rotating shaft of the actuator 32 is connected to the lower end of the screw 31. When the actuator 32 is activated, the actuator 32 drives the screw 31 to rotate in the up-down direction, so that the filter assembly 2 can move along the extension direction of the screw 31, ensuring that the filter assembly 2 is above the water surface in the water tank 1.

[0051] Optionally, the actuator 32 is a motor, which is simple to operate and easy to use.

[0052] like Figure 4 As shown, a sealing ring 33 is provided between the actuator 32 and the bottom of the water tank 1. The sealing ring 33 is provided around the circumference of the actuator 32 to ensure that the water in the inner cavity of the water tank 1 is not easily in contact with the actuator 32, thereby ensuring the safety and service life of the actuator 32. Specifically, the actuator 32 is a motor, which is easy to operate and saves costs.

[0053] Optionally, the outer contour of the filter assembly 2 is adapted to the outer contour of the inner cavity of the water tank 1, thereby increasing the filtering area of ​​the filter assembly 2 for water, achieving large-area filtration and improving filtration efficiency. The outer peripheral wall of the filter assembly 2 is closely attached to the inner peripheral wall of the water tank 1, making it difficult for water to bypass the filter assembly 2, thereby ensuring the filtration effect.

[0054] like Figure 2 As shown, the water tank 1 includes a box body 12 and a box cover 13. The box cover 13 covers the upper end of the box body 12 to seal the upper opening of the box body 12. The water filling hole 11 is provided on the box cover 13, and the drainage hole is provided on the bottom wall of the box body 12. The box cover 13 is in a concave shape in the center.

[0055] Specifically, if Figure 10 As shown, there may be multiple water addition holes 11, which are spaced apart along the circumference of the box cover 13. The box cover 13 is provided at the top of the box body 12 and the center of the box cover 13 is concave. When water is added to the box body 12, the water gathers toward the concave center of the box cover 13 and flows into the box body 12 through the water addition holes 11, making it difficult for the water to overflow, thereby ensuring the filtering effect.

[0056] like Figure 2 As shown, the inner cavity of the water tank 1 has a circular cross-section, and the tank cover 13 is in a concave spherical shape, which ensures that the water accumulated in the concave position is not easy to overflow and bypass the filter component 2, thereby ensuring the filtering effect and improving the filtering efficiency.

[0057] The filter assembly 2 includes a filter housing 21 and a filter core 22. The filter core 22 is disposed within the filter housing 21. The filter housing 21 includes an upper cover 211 and a lower cover 212. The upper cover 211 is provided with a water inlet 2111, and the lower cover 212 is provided with a water outlet 2121. The upper cover 211 and the lower cover 212 are detachably connected to enclose a filter chamber 213. The filter core 22 is disposed within the filter chamber 213.

[0058] like Figure 7-8 As shown, both the upper cover 211 and the lower cover 212 are disc-shaped, which can increase the area of ​​the upper cover 211 and the lower cover 212, thereby achieving large-area filtration of the filter assembly 2 and improving filtration efficiency. The upper cover 211 and the lower cover 212 are detachably connected, making it easy to install and replace the filter element 22 within the filter cavity 213. Moreover, the filter assembly 2 has a simple structure and low cost.

[0059] like Figure 1 As shown, the filter core 22 includes a filter screen 221 and filter particles 222. The filter particles 222 are accommodated in the filter cavity 213, and the filter screen 221 is arranged on the water inlet side of the filter particles 222, so that the water is first filtered through the filter screen 221, and then other impurities in the water are adsorbed and filtered by the filter particles 222, further improving the filtering effect.

[0060] Specifically, the filter particles 222 can be quartz sand, gravel, anthracite, manganese sand, magnetite filter material, fruit shell filter material, porcelain sand filter material, ceramsite, medical stone filter material, etc. Preferably, the filter particles 222 are medical stone filter material.

[0061] like Figure 7-8 As shown, the water inlet holes 2111 are multiple groups of arc-shaped holes, and the multiple groups of water inlet holes 2111 are arranged at intervals along the circumference of the upper cover 211. The multiple water inlet holes 2111 in the same group are arranged at intervals along the radial direction of the upper cover 211, and the arc lengths of the multiple water inlet holes 2111 gradually decrease from the outside to the inside. The water outlet holes 2121 are multiple groups of arc-shaped holes, and the multiple groups of water outlet holes 2121 are arranged at intervals along the circumference of the upper cover 211. The multiple water outlet holes 2121 in the same group are arranged at intervals along the radial direction of the upper cover 211, and the arc lengths of the multiple water outlet holes 2121 gradually decrease from the outside to the inside.

[0062] Specifically, multiple groups of water inlet holes 2111 correspond one-to-one with multiple groups of water outlet holes 2121, and multiple water inlet holes 2111 in the same group correspond one-to-one with multiple water outlet holes 2121 in the same group, which speeds up the flow of water in the filter assembly 2 and thereby improves the filtration efficiency of the filter assembly 2.

[0063] Preferably, the water inlet holes 2111 and the water outlet holes 2121 are staggered in the direction of water flow, thereby increasing the path of water in the filter assembly 2 and further improving the filtering effect.

[0064] like Figure 7 As shown, the upper cover 211 further includes an extension portion 2112, which extends outward around the outer periphery of the upper cover plate 2113 and slopes upward. The outer contour of the extension portion 2112 matches the outer contour of the inner cavity of the water tank 1. When water is added to the water tank 1, the water flows along the extension portion 2112 toward the upper cover plate 2113 and flows into the water tank 1 through the water inlet hole 2111. This prevents water from bypassing the extension portion 2112 and flowing into the water tank 1, thereby ensuring effective filtration.

[0065] like Figure 7 As shown, the upper cover 211 includes an upper cover plate 2113, a first inner flange 2114 and a first outer flange 2115, the upper cover plate 2113 has a first through-hole 21131, the first inner flange 2114 extends downward from the edge of the first through-hole 21131 and the first through-hole 21131 passes through the upper cover plate 2113 and the first inner flange 2114, the first outer flange 2115 extends downward from the outer periphery of the upper cover plate 2113, the outer edge of the lower surface of the first outer flange 2115 is provided with a downward extending elastic tongue 2116, the elastic tongue 2116 is provided with a slot 21161, the outer edge of the lower surface of the first inner flange 2114 is provided with a downward extending inner lower extension 2117, and the inner edge of the lower surface of the first outer flange 2115 is provided with a downward extending outer lower extension 2118.

[0066] Specifically, the first through-hole 21131 is located roughly in the middle of the upper cover plate 2113, with its central axis collinear with the central axis of the upper cover plate 2113. Multiple groups of water inlet holes 2111 are provided on the upper cover plate 2113 and spaced apart along the circumference of the upper cover plate 2113. The cross-sectional area of ​​the inner lower extension 2117 is larger than that of the first inner flange 2114, while the cross-sectional area of ​​the outer lower extension 2118 is smaller than that of the first outer flange 2115. Multiple elastic latches 2116 are provided, spaced apart along the circumference of the first outer flange 2115.

[0067] like Figure 8As shown, the lower cover 212 includes a lower cover plate 2122, a second inner flange 2123 and a second outer flange 2124. The lower cover plate 2122 has a second through-hole 21221. The second inner flange 2123 extends upward from the edge of the second through-hole 21221, and the second through-hole 21221 passes through the lower cover plate 2122 and the second inner flange 2123. The second outer flange 2124 extends upward from the outer periphery of the lower cover plate 2122. The inner edge of the upper surface of the second inner flange 2123 is provided with an upwardly extending inner upper portion 2125. The inner upper extension 2125 is fitted in the inner lower extension 2117 and stops at the lower surface of the first inner flange 2114. The outer edge of the upper surface of the second outer flange 2124 is provided with an outer upper extension 2126 extending upward. The outer lower extension 2118 is fitted in the outer upper extension 2126 and stops at the upper surface of the second outer flange 2124. A groove 2127 is provided on the outer peripheral surface of the second outer flange 2124, which passes through the outer upper extension 2126. The groove 2127 is provided with a locking protrusion 2128 that cooperates with the locking slot 21161.

[0068] Specifically, there may be multiple grooves 2127, which are spaced apart along the circumference of the second outer flange 2124, and the multiple grooves 2127 correspond one-to-one with the multiple elastic latches 2116. When the upper cover 211 and the lower cover 212 are mated, the elastic latches 2116 fit within the grooves 2127, and the latching protrusions 2128 engage with the latching slots 21161, making the mating of the upper cover 211 and the lower cover 212 simple and effective, and facilitating assembly and disassembly.

[0069] Second through-hole 21221 is located approximately in the center of lower cover plate 2122. The central axis of second through-hole 21221, the central axis of lower cover plate 2122, the central axis of first through-hole 21131, and the central axis of upper cover plate 2113 are collinear. Multiple groups of water outlet holes 2121 are provided on lower cover plate 2122 and spaced apart along its circumference.

[0070] The cross-sectional area of ​​the second inner flange 2123 can be the same as that of the first inner flange 2114. The cross-sectional area of ​​the inner upper extension 2125 is smaller than that of the second inner flange 2123. This allows the inner upper extension 2125 to be nested with the inner lower extension 2117, thereby improving the fit between the upper cover 211 and the lower cover 212. The inner upper extension 2125 can abut against the lower surface of the first inner flange 2114, thereby acting as a limiter.

[0071] The cross-sectional area of ​​the second outer flange 2124 is the same as that of the first outer flange 2115. The cross-sectional area of ​​the outer upper extension 2126 is larger than that of the second outer flange 2124. This allows the outer upper extension 2126 to be nested with the outer lower extension 2118, further enhancing the secure fit between the upper cover 211 and the lower cover 212. The outer upper extension 2126 can abut against the upper surface of the second outer flange 2124, thereby acting as a stop.

[0072] like Figure 7-8 As shown, the upper cover plate 2113 has a third through-hole 21191 that passes through the upper cover plate 2113 and is spaced apart from the first through-hole 21131. A first protrusion 21291 is provided on the lower cover plate 2122. The lower cover plate 2122 also has a fourth through-hole 21292 that is spaced apart from the second through-hole 21221 and opposite the third through-hole 21191. The first protrusion 21291 extends upward from the edge of the fourth through-hole 21292 into the third through-hole 21191. The fourth through-hole 21292 passes through the lower cover plate 2122 and the first protrusion 21291. The inner wall of the first protrusion 21291 has an internal thread, and the screw 31 fits within the first protrusion 21291.

[0073] Specifically, the upper end of the first protrusion 21291 extends into the third through-hole 21191, and the outer circumference of the first protrusion 21291 abuts the inner circumference of the third through-hole 21191, further improving the fit and reliability between the upper cover 211 and the lower cover 212. The screw 31 is disposed within the first protrusion 21291 and threadedly engages with the first protrusion 21291, thereby connecting the filter assembly 2 and the screw 31. The coupling is simple, facilitating installation and replacement.

[0074] like Figure 7-8 As shown, the upper cover plate 2113 further has a first recess 21192, which is recessed outward from the inner circumference of the first through-hole 21131. The lower cover plate 2122 further has a second recess 21293, which is recessed outward from the inner circumference of the second through-hole 21221 and is arranged opposite the first recess 21192. The second recess 21293 is provided with a second protrusion 21294, which extends upward from the edge of the second recess 21293 and is connected to the second inner flange 2123.

[0075] Specifically, the upper end of the second protrusion 21294 extends into the first recess 21192, and the outer circumferential surface of the second protrusion 21294 fits with the inner circumferential surface of the first recess 21192, further improving the fit and reliability between the upper cover 211 and the lower cover 212. The through hole is surrounded by the inner circumferential surface of the second protrusion 21294, and the sensing element 41 passes through the second recess 21293, the second protrusion 21294 and the first recess 21192 in sequence.

[0076] The household appliance according to the embodiment of the present invention is described below.

[0077] like Figure 10 As shown, the household appliance 200 according to the embodiment of the present invention includes a water tank assembly 100 and a base 5. The water tank assembly 100 is arranged on the base 5.

[0078] The household appliance of the embodiment of the present invention has a good filtering effect and high filtering efficiency in the water tank assembly 100, which ensures that the filtered water is not easily contaminated by secondary pollution, improves the water filtering efficiency of the household appliance 200, and the water channel of the household appliance 200 is not easily blocked, thereby increasing the service life of the household appliance 200, reducing the maintenance frequency, saving time, labor and cost.

[0079] In some embodiments, as Figure 2 and Figure 10 As shown, household appliance 200 is a humidifier, and water tank assembly 100 further includes a mist outlet conduit 6 and a mist outlet cap 7. Mist outlet conduit 6 is disposed within housing 12, and a mist outlet hole 71 is defined on the top surface of mist outlet cap 7. A tank cover 13 is provided with a connection hole 14. Mist outlet cap 7 is mounted on tank cover 13, with the lower end of mist outlet cap 7 fitting within connection hole 14. The upper end of mist outlet conduit 6 is connected to the lower end of mist outlet cap 7 via a seal 8, and filter assembly 2 slidably engages with the outer circumference of mist outlet conduit 6.

[0080] Specifically, connection hole 14 is located at the center of lid 13, with its central axis aligned with the central axis of mist outlet conduit 6, facilitating proper mating between conduit 6 and cap 7. The sliding fit between filter assembly 2 and conduit 6 prevents deflection as the filter assembly 2 moves up and down with the water level, improving filtration efficiency. The presence of seal 8 prevents unfiltered water on lid 13 from entering conduit 6.

[0081] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present invention.

[0082] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this utility model, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0083] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0084] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0085] In the present invention, the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples without contradiction.

[0086] Although the above embodiments have been shown and described, it is understood that the above embodiments are illustrative and cannot be understood as limitations on the present invention. Changes, modifications, substitutions and variations of the above embodiments made by ordinary technicians in this field are all within the scope of protection of the present invention.

Claims

1. A water tank assembly, characterized in that: The invention comprises a water tank (1), a filter assembly (2), a driving component (3) and a liquid level sensor (4) for detecting the water level in the water tank (1); the water tank (1) has a water inlet (11) and a drain hole; the filter assembly (2) is arranged in the water tank (1) and is used to filter the water added into the water tank (1) from the water inlet (11), and the filtered water is discharged from the water tank (1) from the drain hole; the driving component (3) is connected to the filter assembly (2); the driving component (3) drives the filter assembly (2) to move up and down in the water tank (1) according to the water level in the water tank (1) detected by the liquid level sensor (4), so that the filter assembly (2) is always higher than the water surface in the water tank (1).

2. The water tank assembly according to claim 1, characterized in that The liquid level sensor (4) comprises a sensing element (41) and a float (42), wherein the sensing element (41) is arranged in the water tank (1) and extends in an up-down direction, and the float (42) is slidably arranged on the sensing element (41). The float (42) moves up and down along the sensing element (41) according to the change of the water level in the water tank (1) by buoyancy.

3. The water tank assembly according to claim 2, characterized in that: The filter assembly (2) is provided with a through hole, the sensing element (41) passes through the through hole, and the filter assembly (2) and the sensing element (41) are in sliding engagement.

4. The water tank assembly according to claim 1, characterized in that The liquid level sensor (4) is a float type water level sensor, a pulse type water level sensor, an ultrasonic type water level sensor, a pressure type water level sensor, an optical type water level sensor, a resistance type water level sensor or a capacitance type water level sensor.

5. The water tank assembly according to any one of claims 1 to 4, characterized in that: The driving component (3) comprises a screw (31) and an actuator (32); the screw (31) is arranged in the water tank (1) and extends in the up-down direction; the filter assembly (2) is threadedly engaged with the screw (31); the actuator (32) is connected to the screw (31) to drive the screw (31) to rotate, thereby driving the filter assembly (2) to move in the up-down direction.

6. The water tank assembly according to claim 1, characterized in that The outer peripheral contour of the filter assembly (2) is adapted to the outer peripheral contour of the inner cavity of the water tank (1), and the outer peripheral wall of the filter assembly (2) is slidably fitted to the inner peripheral wall of the water tank (1).

7. The water tank assembly according to claim 5, characterized in that The actuator (32) is a motor.

8. The water tank assembly according to claim 1, characterized in that The filter assembly (2) comprises a filter housing (21) and a filter core (22) arranged in the filter housing (21); the filter housing (21) comprises an upper cover (211) and a lower cover (212); the upper cover (211) is provided with a water inlet (2111); the lower cover (212) is provided with a water outlet (2121); the upper cover (211) and the lower cover (212) are detachably connected to enclose a filter cavity (213); the filter core (22) is arranged in the filter cavity (213); the filter core (22) comprises a filter screen (221) and filter particles (222).

9. A household appliance, characterized in that: The invention comprises a water tank assembly (100) according to any one of claims 1 to 8.

10. The household appliance according to claim 9, characterized in that The household appliance (200) is a humidifier. The water tank assembly (100) further includes a mist outlet conduit (6) and a mist outlet cap (7). The water tank (1) includes a tank body (12) and a tank cover (13). The mist outlet conduit (6) is arranged in the tank body (12). The mist outlet cap (7) is provided with a mist outlet hole (71). The tank cover (13) is provided with a connecting hole (14). The mist outlet cap (7) is mounted on the tank cover (13). The lower end of the mist outlet cap (7) is engaged in the connecting hole (14). The upper end of the mist outlet conduit (6) is connected to the lower end of the mist outlet cap (7) through a sealing member (8). The filter assembly (2) is slidably engaged with the outer peripheral surface of the mist outlet conduit (6).

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