Water tank assembly and household appliance

Abstract

The water tank assembly comprises a water tank, a filtering assembly and a water level detector 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 water level detector is used for detecting the water level in the water tank. The water level detector is 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, and when the water level detector detects that the water level in the water tank reaches a preset value, water injection into the water tank through the water adding hole is stopped, so that the filtering 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 always or most of the time immersed in water, and impurities in the filter structure can easily cause secondary contamination of the water. In addition, in related art, the filter structure is fixed at the bottom or middle of 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 utility model includes a water tank, a filter assembly and a water level detector for detecting the water level in the water tank. The water tank has a water filling hole and a drainage 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 drainage hole. When the water level detector detects that the water level in the water tank reaches a preset value, it stops injecting water into the water tank through the water filling hole, so that 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, the water level detector monitors the water level in the water tank in real time, ensuring that the water surface of the water tank is always lower than the filter assembly, so that the filter assembly will not come into contact with the filtered water, avoiding impurities in the filter assembly from secondary contamination of the filtered water, and improving the filtering effect.

[0008] Optionally, the filter assembly is arranged at the top of the water tank, the outer contour of the filter assembly is adapted to the outer contour of the inner cavity of the water tank, and the outer peripheral wall of the filter assembly is fitted to the inner peripheral wall of the water tank.

[0009] The water tank assembly of the present invention increases the volume of filtered water in the water tank by placing the filter assembly at the top of the water tank, better avoiding contact between the filter assembly and the filtered water, thereby further improving the filtering effect. The filter assembly is easy to install and remove, and there is no need to empty the water in the water tank, which reduces water waste and reduces costs. The outer contour of the filter assembly is adapted to the outer contour of the inner cavity of the water tank, increasing the filtering area of ​​the filter assembly for water, achieving large-area filtration and improving filtering efficiency. The outer peripheral wall of the filter assembly is in contact with the inner peripheral wall of the water tank, making it difficult for water to bypass the filter assembly, thereby ensuring the filtering effect.

[0010] Optionally, the water level detector is arranged in the water tank, and the water level detector is 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.

[0011] The water tank assembly of the embodiment of the utility model can conveniently select a water level detector according to specific applications, thereby improving applicability.

[0012] Optionally, the water level detector 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 relies on buoyancy to move up and down along the sensing element as the water level in the water tank changes. When the float reaches a preset height, it stops injecting water into the water tank through the water filling hole.

[0013] In the water tank assembly of the embodiment of the utility model, 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. When the float reaches the preset height of the sensor, the sensor transmits a signal so that water is no longer injected into the water tank through the water filling hole, thereby ensuring that the water surface in the water tank is always lower than the filter assembly, thereby ensuring the filtering effect, and the sensing element can guide the float, and the movement of the float is smooth and reliable.

[0014] Optionally, the water tank includes a tank body and a tank cover, the tank cover is covered on the upper end of the tank body to seal the upper opening of the tank body, the water filling hole is provided on the tank cover, the drainage hole is provided on the bottom wall of the tank body, and the tank cover is in a centrally concave shape.

[0015] The water tank assembly of the embodiment of the utility model has a concave center of the tank cover. When water is added to the tank, the water gathers toward the concave center of the tank cover and flows into the tank through the water filling hole, making water addition smoother and more reliable and preventing water overflow.

[0016] Optionally, the inner cavity of the water tank has a circular cross-section, the filter assembly includes a filter housing and a filter core 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, and the filter core is arranged in the filter cavity.

[0017] In the water tank assembly of the embodiment of the utility model, the upper cover and the lower cover are detachably connected, which facilitates the installation and replacement of the filter core. Moreover, the filter assembly has a simple structure and low cost.

[0018] Optionally, the upper cover includes an upper cover plate, a first inner flange and a first outer flange, the upper cover plate has a first through-hole, the first inner flange extends downward from the edge of the first through-hole and the first through-hole passes through the upper cover plate and the first inner flange, the first outer flange extends downward from the outer peripheral edge of the upper cover plate, the outer edge of the lower surface of the first outer flange is provided with an elastic tongue extending downward, the elastic tongue is provided with a slot, the outer edge of the lower surface of the first inner flange is provided with an inner lower extension portion extending downward, the inner edge of the lower surface of the first outer flange is provided with an outer lower extension portion extending downward, the lower cover includes a lower cover plate, a second inner flange and a second outer flange, the lower cover plate has a second through-hole The second flange has a groove which passes through the outer peripheral edge of the lower cover plate and the second inner flange, and the second outer flange extends upward from the outer peripheral edge of the lower cover plate. The inner edge of the upper surface of the second inner flange is provided with an inner upper extension portion which extends upward, and the inner upper extension portion is fitted in the inner lower extension portion and stops at the lower surface of the first inner flange. The outer edge of the upper surface of the second outer flange is provided with an outer upper extension portion which extends upward, and the outer lower extension portion is fitted in the outer upper extension portion and stops at the upper surface of the second outer flange. The outer peripheral surface of the second outer flange is provided with a groove which passes through the outer upper extension portion, and the groove is provided with a clamping protrusion which cooperates with the clamping slot.

[0019] In the water tank assembly of the embodiment of the present invention, the upper cover and the lower cover are connected by snap-fitting, and the fitting method is simple and convenient for assembly and disassembly. In addition, the inner lower extension on the upper cover and the inner upper extension on the lower cover fit together, and the outer lower extension on the upper cover and the outer upper extension on the lower cover fit together, which further improves the fitting reliability between the upper cover and the lower cover.

[0020] Optionally, the filter core includes a filter mesh and filter particles, the filter particles are accommodated in the filter cavity, and the filter mesh is arranged on the water inlet side of the filter particles.

[0021] In the water tank assembly of the embodiment of the present invention, the filter screen is laid on the water inlet side of the filter particles. The water is first filtered through the filter screen, and then other impurities in the water are adsorbed and filtered through the filter particles, thereby further improving the filtering effect.

[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 utility model has a good filtering effect of the water tank assembly, which improves the efficiency and effect of the household appliance in filtering water, reduces the blockage of the water channel, and the filtered water is not easily polluted again.

[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 top surface of the mist outlet cap is provided with a mist outlet hole, the water tank cover is provided with a connecting hole, the mist outlet duct is provided in the water tank, the mist outlet cap is installed on the cover, 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 sleeved on the outer peripheral side of the mist outlet duct and fits with the outer peripheral surface of the mist outlet duct.

[0025] In the household appliance of the embodiment of the present utility model, the filter assembly is fitted with the outer peripheral surface of the mist outlet duct, ensuring that water is not easily flowed downward from between the filter assembly and the outer peripheral surface of the mist outlet duct, thereby ensuring the filtering effect. A seal is provided between the mist outlet duct and the mist outlet cap, so that unfiltered water on the box cover is not easily entered into the mist outlet duct.

[0026] Optionally, a retaining rib is provided on the mist outlet conduit, the retaining rib is arranged around the outer circumference of the mist outlet conduit, and the retaining rib stops at the bottom surface of the filter assembly.

[0027] The household appliance of the embodiment of the utility model ensures that the filter assembly is firmly installed by providing retaining ribs and is not easily moved downward to contact the filtered water, thereby ensuring the filtering effect and avoiding secondary pollution. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is an exploded schematic diagram of the water tank assembly of an embodiment of the present utility model.

[0029] Figure 2 It is a top view of the box body of the water tank assembly according to an embodiment of the present utility model.

[0030] Figure 3 It is a cross-sectional view of a water tank assembly according to an embodiment of the present utility model.

[0031] Figure 4 It is a cross-sectional view of another embodiment of the water tank assembly of the utility model embodiment.

[0032] Figure 5 It is a schematic diagram of a water level sensor of a water tank assembly according to an embodiment of the present invention.

[0033] Figure 6It is a schematic diagram of the filter assembly of the water tank assembly according to an embodiment of the present utility model.

[0034] 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.

[0035] 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.

[0036] Figure 9 yes Figure 4 Enlarged schematic diagram of part A.

[0037] Figure 10 Schematic diagram of a household appliance according to an embodiment of the present invention.

[0038] Reference numerals: 100, water tank assembly; 200, household appliance; 1, water tank; 11, tank body; 12, tank cover; 21, water filling hole; 22, connecting hole; 3, filter assembly; 31, filter housing; 311, upper cover; 3111, water inlet; 3112, upper cover plate; 31121, first through-hole; 3113, first inner flange; 31131, inner lower extension; 3114, first outer flange; 31141, elastic tongue; 31142, slot; 31143, outer lower extension; 3115, extension; 312, lower cover; 3121, water outlet; 3122, lower cover plate; 31221. Second perforation; 3123. Second inner flange; 31231. Inner upper extension; 3124. Second outer flange; 31241. Outer upper extension; 31242. Groove; 31243. Lug; 313. Filter cavity; 32. Filter core; 321. Filter screen; 322. Filter particles; 4. Water level detector; 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; 61. Rebar; 7. Mist outlet cap; 71. Mist outlet hole; 8. Sealing part. DETAILED DESCRIPTION

[0039] 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.

[0040] like Figures 1-10 As shown, the embodiment of 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 the embodiment of the present invention is not limited to being used in household appliances, but can also be used in other devices and occasions having similar water tank assemblies.

[0041] The water tank assembly of the embodiment of the utility model is first described below.

[0042] like Figure 1-3 As shown, the water tank assembly 100 of the embodiment of the present invention includes a water tank 1, a filter assembly 3 and a water level detector 4. The water level detector 4 is used to detect the water level in the water tank 1. The water tank 1 has a water inlet 21 and a drain hole (not shown). The filter assembly 3 is arranged in the water tank 1 and is located between the water inlet 21 and the drain hole. The filter assembly 3 is used to filter the water added to the water tank 1 through the water inlet 21, and the filtered water is discharged from the water tank 1 through the drain hole. When the water level detector 4 detects that the water level in the water tank 1 reaches a preset value, it stops injecting water into the water tank 1 through the water inlet 21, so that the filter assembly 3 is always higher than the water surface in the water tank 1 and does not come into contact with the filtered water.

[0043] In the water tank assembly of the embodiment of the present invention, the water level detector 4 monitors the water level in the water tank 1 in real time, so that the water surface of the water tank 1 is always lower than the filter assembly 3, avoiding the secondary contamination of the filtered water by impurities filtered in the filter assembly 3, and improving the filtering effect.

[0044] In some embodiments, the water tank assembly 100 also includes a water injector (not shown), which is connected to the water source and the water filling hole 21 for injecting water into the water tank 1. The water injector is connected to the water level detector 4. When the water level detector 4 detects that the water level in the water tank 1 reaches a preset value, the water injector stops injecting water into the water tank 1. The water injected into the water tank 1 is controlled by the water injector, and the operation is simple.

[0045] like Figure 4 As shown, filter assembly 3 is located at the top of water tank 1. As a result, the volume of water tank 1 below filter assembly 3 is larger, increasing the capacity of water tank 1 to hold filtered water and fully utilizing the space in water tank 1. Furthermore, since filter assembly 3 is located at the top of water tank 1, it is easy to install and remove, and there is no need to drain the water in water tank 1 when replacing it, reducing water waste and lowering costs.

[0046] like Figure 4 As shown, the outer contour of the filter assembly 3 is adapted to the outer contour of the inner cavity of the water tank 1, increasing the filtering area of ​​the filter assembly 3 for water and achieving large-area filtration. The outer peripheral wall of the filter assembly 3 is closely attached to the inner peripheral wall of the water tank 1, making it difficult for water to bypass the filter assembly 3, thus ensuring the filtration effect.

[0047] Alternatively, the water level detector 4 may 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 detector 4 may 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] In some preferred embodiments, Figure 5 As shown, the water level detector 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 up-down direction. The float 42 is slidably disposed on the sensing element 41. Preferably, the float 42 is sleeved on the sensing element 41. The float 42 moves up and down along the sensing element 41 as the water level in the water tank 1 changes due to buoyancy. When the float 42 reaches a preset height, the water injector stops injecting water into the water tank 1. The float 42 moves on the sensing element 41 as the water level in the water tank 1 changes, realizing real-time monitoring of the water level in the water tank 1, improving accuracy, and ensuring that the water surface in the water tank 1 is always lower than the filter assembly 3, thereby ensuring the filtration effect.

[0049] Specifically, the float 42 can be slidably mounted on the outer periphery of the mounting member 412, and the inner periphery of the float 42 is adapted to the outer periphery of the mounting member 412. The float 42 can be made of a buoyant material, such as a plastic material or a foam material.

[0050] In some specific examples, the float 42 is a magnetic float. For example, the float 42 includes a body 421 and a magnetic body embedded within the body 421. The body 421 is made of a buoyant material, allowing the float 422 to float on the water surface. The body 421 has a through-hole 422, through which the body 421 is attached to the sensing element 41. The sensing element 41 may include a sensing plate 411 and a mounting member 412. The mounting member 412 extends vertically within the water tank 1. The mounting member 412 has a mounting position 4121 extending vertically. The sensing plate 411 is positioned within the mounting position 4121. Two metal springs (not shown) may be positioned opposite and spaced apart at the upper end of the sensing plate 411. When the metal springs sense the magnetic field of the float 42, they become magnetized by the magnetic field, causing the two metal springs to mate, thereby detecting the water level in the water tank 1. It will be appreciated that the operating principle of the metal springs described above is similar to that of a reed switch.

[0051] 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 floats upward and approaches the upper end of the sensing plate 411, the magnetic field generated by the float 42 also gradually approaches the metal shrapnel. Under the influence of the magnetic field, the metal shrapnel adheres to each other and generates signals. After receiving the signal, the water injector stops injecting water into the water tank 1.

[0052] 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.

[0053] like Figure 4 As shown, the water tank 1 includes a box body 11 and a box cover 12. The box cover 12 covers the upper end of the box body 11 to seal the upper opening of the box body 11. The water filling hole 21 is provided on the box cover 12, and the drainage hole is provided on the bottom wall of the box body 11. The box cover 12 is in a concave shape in the center.

[0054] Specifically, there may be multiple water addition holes 21, which are spaced apart along the circumference of the box cover 12. The box cover 12 is located at the top of the box body 11, and the center of the box cover 12 is concave. When water is added to the box body 11, the water gathers toward the concave center of the box cover 12 and flows into the box body 11 through the water addition holes 21, making water addition smoother and more reliable and preventing water overflow.

[0055] like Figure 4 As shown, the inner cavity of the water tank 1 has a circular cross-section, the outer peripheral contour of the filter component 3 is adapted to the outer peripheral contour of the inner cavity and is also circular, and the box cover 12 is a concave spherical segment, which ensures that the water accumulated in the concave position is not easy to overflow and bypass the filter component 3, thereby ensuring the filtering effect and improving the filtering efficiency.

[0056] like Figure 1 As shown, the filter assembly 3 includes a filter housing 31 and a filter core 32. The filter core 32 is disposed in the filter housing 31. The filter housing 31 includes an upper cover 311 and a lower cover 312. The upper cover 311 is provided with a water inlet 3111, and the lower cover 312 is provided with a water outlet 3121. The upper cover 311 and the lower cover 312 are detachably connected to enclose a filter chamber 313. The filter core 32 is disposed in the filter chamber 313.

[0057] Specifically, both the upper cover 311 and the lower cover 312 are disc-shaped, which increases the surface area of ​​the upper cover 311 and the lower cover 312, thereby achieving large-area filtration for the filter assembly 3 and improving filtration efficiency. The upper cover 311 and the lower cover 312 are detachably connected, making it easy to install and replace the filter element 32 within the filter cavity 313. Furthermore, the filter assembly 3 has a simple structure and low cost.

[0058] like Figure 7 and Figure 8As shown, the water inlet holes 3111 are multiple groups of arc-shaped holes, and the multiple groups of water inlet holes 3111 are arranged at intervals along the circumference of the upper cover 311. The multiple water inlet holes 3111 in the same group are arranged at intervals along the radial direction of the upper cover 311, and the arc lengths of the multiple water inlet holes 3111 gradually decrease from the outside to the inside. The water outlet holes 3121 are multiple groups of arc-shaped holes, and the multiple groups of water outlet holes 3121 are arranged at intervals along the circumference of the upper cover 311. The multiple water outlet holes 3121 in the same group are arranged at intervals along the radial direction of the upper cover 311, and the arc lengths of the multiple water outlet holes 3121 gradually decrease from the outside to the inside.

[0059] Specifically, multiple groups of water inlet holes 3111 correspond one-to-one with multiple groups of water outlet holes 3121, and multiple water inlet holes 3111 in the same group correspond one-to-one with multiple water outlet holes 3121 in the same group, which speeds up the flow of water in the filter assembly 3 and thereby improves the filtering efficiency of the filter assembly 3.

[0060] Preferably, the water inlet hole 3111 and the water outlet hole 3121 are staggered in the direction of water flow, thereby increasing the path of water in the filter assembly 3 and further improving the filtering effect.

[0061] like Figure 7 As shown, the upper cover 311 includes an upper cover plate 3112, a first inner flange 3113 and a first outer flange 3114, the upper cover plate 3112 has a first through-hole 31121, the first inner flange 3113 extends downward from the edge of the first through-hole 31121 and the first through-hole 31121 passes through the upper cover plate 3112 and the first inner flange 3113, the first outer flange 3114 extends downward from the outer periphery of the upper cover plate 3112, the outer edge of the lower surface of the first outer flange 3114 is provided with a downward extending elastic tongue 31141, the elastic tongue 31141 is provided with a slot 31142, the outer edge of the lower surface of the first inner flange 3113 is provided with a downward extending inner lower extension 31131, and the inner edge of the lower surface of the first outer flange 3114 is provided with a downward extending outer lower extension 31143.

[0062] Specifically, the first through-hole 31121 is located roughly in the middle of the upper cover plate 3112, with its central axis collinear with the central axis of the upper cover plate 3112. Multiple groups of water inlet holes 3111 are provided on the upper cover plate 3112 and spaced apart along the circumference of the upper cover plate 3112. The cross-sectional area of ​​the inner lower extension 31131 is larger than that of the first inner flange 3113, while the cross-sectional area of ​​the outer lower extension 31143 is smaller than that of the first outer flange 3114. Multiple elastic latches 31141 are provided, spaced apart along the circumference of the first outer flange 3114.

[0063] like Figure 7As shown, the upper cover 311 also includes an extension portion 3115, which extends outward around the outer periphery of the upper cover plate 3112 and tilts upward. The outer peripheral contour of the extension portion 3115 is adapted to the outer peripheral contour of the inner cavity of the water tank 1. When water is added to the water tank 1, the water gathers along the extension portion 3115 to the upper cover plate 3112 and flows into the water tank 1 through the water inlet hole 3111, making it difficult for water to bypass the extension portion 3115 and flow into the water tank 1, thereby ensuring the filtering effect.

[0064] like Figure 8 As shown, the lower cover 312 includes a lower cover plate 3122, a second inner flange 3123 and a second outer flange 3124. The lower cover plate 3122 has a second through-hole 31221. The second inner flange 3123 extends upward from the edge of the second through-hole 31221 and the second through-hole 31221 passes through the lower cover plate 3122 and the second inner flange 3123. The second outer flange 3124 extends upward from the outer periphery of the lower cover plate 3122. The inner edge of the upper surface of the second inner flange 3123 is provided with an inner upper extension portion 31231 extending upward. The extension portion 31231 fits within the inner lower extension portion 31131 and stops against the lower surface of the first inner flange 3113. The outer edge of the upper surface of the second outer flange 3124 is provided with an outer upper extension portion 31241 extending upward. The outer lower extension portion 31143 fits within the outer upper extension portion 31241 and stops against the upper surface of the second outer flange 3124. A groove 31242 passing through the outer upper extension portion 31241 is provided on the outer peripheral surface of the second outer flange 3124. A latching protrusion 31243 mating with the latching slot 31142 is provided in the groove 31242.

[0065] Specifically, there may be multiple grooves 31242, which are spaced apart along the circumference of the second outer flange 3124. The grooves 31242 correspond one-to-one with the elastic latches 31141. When the upper cover 311 and the lower cover 312 are mated, the elastic latches 31141 fit within the grooves 31242, and the latching protrusions 31243 engage with the latching slots 31142, making the mating of the upper cover 311 and the lower cover 312 simple and effective, and facilitating assembly and disassembly.

[0066] Second through-hole 31221 is located approximately in the center of lower cover plate 3122. The central axis of second through-hole 31221, the central axis of lower cover plate 3122, the central axis of first through-hole 31121, and the central axis of upper cover plate 3112 are collinear. Multiple groups of water outlet holes 3121 are provided on lower cover plate 3122 and spaced apart along its circumference.

[0067] like Figure 9As shown, the cross-sectional area of ​​the second inner flange 3123 can be the same as that of the first inner flange 3113. The cross-sectional area of ​​the inner upper extension 31231 is smaller than that of the second inner flange 3123. This allows the inner upper extension 31231 to be nested with the inner lower extension 31131, thereby improving the secure fit between the upper cover 311 and the lower cover 312. The inner upper extension 31231 can abut against the lower surface of the first inner flange 3113, thereby acting as a limiter.

[0068] The cross-sectional area of ​​the second outer flange 3124 is the same as that of the first outer flange 3114. The cross-sectional area of ​​the outer upper extension 31241 is larger than that of the second outer flange 3124. This allows the outer upper extension 31241 to be nested with the outer lower extension 31143, further enhancing the secure fit between the upper cover 311 and the lower cover 312. The outer upper extension 31241 can abut against the upper surface of the second outer flange 3124, thereby acting as a stop.

[0069] like Figure 1 As shown, the filter core 32 includes a filter mesh 321 and filter particles 322. The filter particles 322 are accommodated in the filter cavity 313. The filter mesh 321 is arranged on the water inlet side of the filter particles 322 to first filter the water through the filter mesh 321, and then adsorb and filter other impurities in the water through the filter particles 322, thereby further improving the filtering effect.

[0070] Specifically, the filter particles 322 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 322 are medical stone filter material.

[0071] The household appliance according to the embodiment of the present invention is described below.

[0072] like Figure 10 As shown, the household appliance 200 of the embodiment of the present invention includes a water tank assembly and a base 5 . The water tank assembly can be the water tank assembly 100 of the above embodiment and is arranged on the base 5 .

[0073] In the household appliance of the embodiment of the present invention, the water tank assembly 100 has high filtering efficiency and ensures that the filtered water is not easily contaminated by secondary pollution, thereby improving the water filtering effect 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.

[0074] In some embodiments, the household appliance 200 is a humidifier, such as Figure 4As shown, the water tank assembly 100 also includes a mist outlet duct 6 and a mist outlet cap 7. The top surface of the mist outlet cap 7 is provided with a mist outlet hole 71, and the box cover 12 is provided with a connecting hole 22. The mist outlet duct 6 is arranged in the water tank 1, and the mist outlet cap 7 is installed on the box cover 12. The lower end of the mist outlet cap 7 fits in the connecting hole 22, and the upper end of the mist outlet duct 6 is connected to the lower end of the mist outlet cap 7 through a seal 8. The filter assembly 3 is sleeved on the outer periphery of the mist outlet duct 6 and fits with the outer peripheral surface of the mist outlet duct 6.

[0075] Specifically, the connection hole 22 is located at the center of the cover 12, and its central axis is collinear with the central axis of the mist outlet conduit 6, facilitating the proper mating of the conduit 6 and the mist outlet cap 7. A seal 8 is provided between the conduit 6 and the mist outlet cap 7, circumferentially surrounding the lower end of the cap 7 to prevent water from entering the conduit 6. The filter assembly 3 is in close contact with the outer circumference of the mist outlet conduit 6, preventing water from flowing downward between the filter assembly 3 and the outer circumference of the conduit 6 into the filtered water, thereby enhancing filtration effectiveness.

[0076] like Figure 9 As shown, a retaining rib 61 is provided on the mist outlet duct 6. The retaining rib 61 is located at the upper end of the mist outlet duct 6 and is arranged around the outer circumference of the mist outlet duct 6. The retaining rib 61 contacts the bottom surface of the filter assembly 3 to stop the filter assembly 3, ensuring that the filter assembly 3 is installed firmly and is not easy to move downward and contact with the filtered water, thereby ensuring the filtering effect and avoiding secondary pollution.

[0077] 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.

[0078] 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.

[0079] 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.

[0080] 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.

[0081] 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.

[0082] 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 (3) and a water level detector (4) for detecting the water level in the water tank (1); the water tank (1) has a water inlet (21) and a drain hole; the filter assembly (3) is arranged in the water tank (1) and is used to filter the water added into the water tank (1) through the water inlet (21), and the filtered water is discharged from the water tank (1) through the drain hole; when the water level detector (4) detects that the water level in the water tank (1) reaches a preset value, it stops injecting water into the water tank (1) through the water inlet (21), so that the filter assembly (3) 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 filter assembly (3) is arranged at the top of the water tank (1), the outer peripheral contour of the filter assembly (3) 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 (3) is in contact with the inner peripheral wall of the water tank (1).

3. The water tank assembly according to claim 1, characterized in that The water level detector (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.

4. The water tank assembly according to claim 1, characterized in that The water level detector (4) comprises a sensing element (41) and a float (42). The sensing element (41) is arranged in the water tank (1) and extends in the up-down direction. 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. When the float (42) reaches a preset height, water is stopped from being injected into the water tank (1) through the water filling hole (21).

5. The water tank assembly according to any one of claims 1 to 4, characterized in that: The water tank (1) comprises a tank body (11) and a tank cover (12), wherein the tank cover (12) covers the upper end of the tank body (11) to seal the upper opening of the tank body (11), the water filling hole (21) is provided on the tank cover (12), and the drainage hole is provided on the bottom wall of the tank body (11), and the tank cover (12) is in a shape with a concave center.

6. The water tank assembly according to claim 1, characterized in that The inner cavity of the water tank (1) has a circular cross-section. The filter assembly (3) comprises a filter housing (31) and a filter core (32) arranged in the filter housing (31). The filter housing (31) comprises an upper cover (311) and a lower cover (312). The upper cover (311) is provided with a water inlet hole (3111), and the lower cover (312) is provided with a water outlet hole (3121). The upper cover (311) and the lower cover (312) are detachably connected to each other to enclose a filter cavity (313). The filter core (32) is arranged in the filter cavity (313).

7. The water tank assembly according to claim 6, characterized in that The upper cover (311) includes an upper cover plate (3112), a first inner flange (3113) and a first outer flange (3114), wherein the upper cover plate (3112) has a first through-hole (31121), the first inner flange (3113) extends downward from the edge of the first through-hole (31121) and the first through-hole (31121) passes through the upper cover plate (3112) and the first inner flange (3113), and the first outer flange (3114) extends from the edge of the first through-hole (31121). The outer periphery of the upper cover plate (3112) extends downward, the outer edge of the lower surface of the first outer flange (3114) is provided with an elastic tongue (31141) extending downward, and the elastic tongue (31141) is provided with a slot (31142), the outer edge of the lower surface of the first inner flange (3113) is provided with an inner lower extension portion (31131) extending downward, and the inner edge of the lower surface of the first outer flange (3114) is provided with an outer lower extension portion (31143) extending downward. The lower cover (312) includes a lower cover plate (3122), a second inner flange (3123) and a second outer flange (3124), wherein the lower cover plate (3122) has a second through-hole (31221), the second inner flange (3123) extends upward from the edge of the second through-hole (31221) and the second through-hole (31221) passes through the lower cover plate (3122) and the second inner flange (3123), the second outer flange (3124) extends upward from the outer periphery of the lower cover plate (3122), the inner edge of the upper surface of the second inner flange (3123) is provided with an inner upper extension portion (31231) extending upward, and the inner flange (3123) is provided with an inner upper extension portion (31231) extending upward. The upper extension portion (31231) is fitted in the inner lower extension portion (31131) and stops at the lower surface of the first inner flange (3113); the outer edge of the upper surface of the second outer flange (3124) is provided with an outer upper extension portion (31241) extending upward; the outer lower extension portion (31143) is fitted in the outer upper extension portion (31241) and stops at the upper surface of the second outer flange (3124); a groove (31242) passing through the outer upper extension portion (31241) is provided on the outer peripheral surface of the second outer flange (3124); a locking protrusion (31243) matching the locking slot (31142) is provided in the groove (31242).

8. The water tank assembly according to claim 6, characterized in that The filter core (32) comprises a filter screen (321) and filter particles (322), the filter particles (322) are accommodated in the filter cavity (313), and the filter screen (321) is arranged on the water inlet side of the filter particles (322).

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 comprises a mist outlet conduit (6) and a mist outlet cap (7). The top surface of the mist outlet cap (7) is provided with a mist outlet hole (71). The tank cover (12) of the water tank (1) is provided with a connecting hole (22). The mist outlet conduit (6) is provided in the water tank (1). The mist outlet cap (7) is mounted on the tank cover (12). The lower end of the mist outlet cap (7) fits in the connecting hole (22). The upper end of the mist outlet conduit (6) is connected to the lower end of the mist outlet cap (7) via a sealing member (8). The filter assembly (3) is sleeved on the outer peripheral side of the mist outlet conduit (6) and fits the outer peripheral surface of the mist outlet conduit (6).

11. The household appliance according to claim 10, characterized in that The mist outlet conduit (6) is provided with a retaining rib (61), the retaining rib (61) being arranged around the outer peripheral surface of the mist outlet conduit (6), and the retaining rib (61) abuts against the bottom surface of the filter assembly (3).

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