Water purifier

Abstract

The water purifier comprises a filter element assembly, the filter element assembly comprises a filter bottle, a filter element and an end cover, the filter bottle is provided with a filter cavity, a water inlet and a water outlet, the water inlet and the water outlet are communicated with the filter cavity, and a water inlet channel communicated with the water inlet is formed between the filter element and the inner wall of the filter bottle; the end cover is provided with an air inlet channel and an exhaust hole which are communicated with the water inlet channel; a water separation upper cover located between the filter element and the end cover is arranged in the filter cavity, and the water separation upper cover and the end cover are matched to form an overflowing channel; the end cover and / or the upper waterproof cover are / is provided with a floating cavity, the filter element assembly further comprises an exhaust valve movably arranged on the end cover, and the exhaust valve floats upwards under the buoyancy action of water in the floating cavity so as to seal the exhaust hole. The residual quantity of the gas in the filter bottle can be reduced, so that the phenomenon that when water taking is stopped, water still can be pushed to flow under the action of air pressure due to the fact that the air pressure is formed by the gas remaining in the filter cavity is avoided, the water dripping phenomenon of the faucet in the non-water-taking state is avoided, and the user experience is improved.

Description

Technical Field

[0001] The present application belongs to the technical field of water purification equipment, and specifically relates to a water purifier. Background Art

[0002] Existing desktop water purifiers are equipped with water faucets through universal joints or threaded connections. There is no switch at the water faucet to control the opening and closing of the water outlet separately. Instead, the start and stop control of the overall water circuit is achieved by controlling the start and stop of the filter unit in the water purifier. During the installation of the filter unit, some gas is not discharged in advance. During the water flow process, the gas cannot pass through the ultrafiltration membrane of the filter unit to be discharged, but forms air pressure under the pressure of the water. When the booster pump of the filter unit stops running, the water pressure disappears, and the air pressure in the filter unit will push the water through the ultrafiltration membrane and flow out of the water faucet, causing the water faucet to still drip when it is not taking water, affecting the user experience. Utility Model Content

[0003] The present application provides a water purifier to solve the technical problem of dripping at the water tap of the existing water purifier due to the air pressure in the filter unit.

[0004] The technical solution adopted in this application is:

[0005] A water purifier comprises a filter element assembly, the filter element assembly comprises a filter bottle having a filter cavity, a filter element located in the filter cavity, and an end cover for opening or closing the filter cavity, the filter bottle is provided with a water inlet and a water outlet connected to the filter cavity, a water inlet channel connected to the water inlet is formed between the filter element and the inner wall of the filter bottle; the end cover is provided with an air inlet channel and an air exhaust hole connected to the water inlet channel; the filter cavity is also provided with a water-proof upper cover located between the filter element and the end cover, the water-proof upper cover cooperates with the end cover to form a flow channel connecting the water inlet channel and the air inlet channel; the end cover and / or the water-proof upper cover are provided with a float cavity, the filter element assembly also comprises an exhaust valve movably provided on the end cover, the exhaust valve floats up under the buoyancy of water in the float cavity to close the exhaust hole.

[0006] The water purifier in this application also includes the following additional technical features:

[0007] The float chamber is arranged on the water-proof upper cover, and a sealing member is sandwiched between the water-proof upper cover and the end cover, so that the gas is discharged through the exhaust hole after passing through the water inlet channel, the flow channel, the air inlet channel, the float chamber in sequence.

[0008] The filter element comprises a primary filter element and a secondary filter element built in the primary filter element. A cavity located above the secondary filter element is provided in the primary filter element, and a partial area of ​​the float cavity is placed in the cavity.

[0009] The exhaust valve comprises a valve core and a floating member driving the valve core to move. The floating member drives the valve core to move upward under the buoyancy of water in the float chamber to close the exhaust hole.

[0010] The end cover is provided with a guide column extending downward, the interior of the guide column is hollow to form a sliding channel for the valve core to slide, and the sliding channel is connected to the exhaust hole; the guide column is also provided with an air hole connected to the sliding channel; the end cover is also provided with an exhaust channel arranged around the guide column, and the exhaust channel is connected to the air hole.

[0011] The float chamber is arranged on the water-proof upper cover, and the projection of the floating member toward the end cover covers the exhaust passage.

[0012] A stop step is provided in the exhaust hole, and the stop step can cooperate with the valve core stop to limit the axial movement distance of the valve core along the exhaust hole; or, the exhaust hole is a variable diameter structure with a smaller upper part and a larger lower part, and the valve core moves upward to abut against the inner wall of the exhaust hole to limit the axial movement distance of the valve core along the exhaust hole.

[0013] The exhaust valve comprises a valve core and a floating member driving the valve core to move. The floating member floats up under the buoyancy of water in the float chamber. The valve core is detachably connected to the floating member.

[0014] The exhaust valve also includes a connecting piece, the valve core is provided with a first positioning hole adapted to the connecting piece, the floating piece is provided with a second positioning hole adapted to the connecting piece, and the valve core is also provided with an elastic piece for driving the connecting piece to move axially along the first positioning hole so that a partial area of ​​the connecting piece extends into the second positioning hole.

[0015] The connecting piece is provided with a stop rib on the outside, the valve core is provided with a guide groove adapted to the stop rib, and the inner wall of the valve core is provided with a guide limit rib protruding inwardly, the connecting piece can rotate along the first positioning hole to make the stop rib slide along the guide limit rib, and the stop rib stops the inner wall of the valve core to limit the connecting piece from escaping from the first positioning hole.

[0016] Due to the adoption of the above technical solution, the beneficial effects achieved by this application are as follows:

[0017] 1. In the present application, an air inlet channel and an exhaust hole connected to the filter chamber are provided on the end cover of the filter bottle, so that when water is passed into the filter chamber, as much residual gas as possible in the filter chamber can be discharged through the exhaust hole after passing through the flow channel and the air inlet channel under the action of water pressure, thereby greatly reducing the residual amount of gas in the filter bottle, so as to avoid the gas remaining in the filter chamber to form air pressure, which leads to the phenomenon that water can still be driven to flow under the action of air pressure when the water supply is turned off, thereby avoiding the dripping phenomenon of the faucet when no water is taken, and improving the user experience.

[0018] The end cap and / or water-proof upper cover in the present application is provided with a float cavity, and the exhaust valve is movably arranged on the end cap. When the water purifier is used, after the water demand is issued for the first time, water is passed into the filter cavity, and the water flows in the filter cavity through the water inlet channel, and pushes the gas to flow into the air inlet channel through the flow channel, and finally discharged from the exhaust hole. After the water enters the float cavity, the exhaust valve floats upward under the buoyancy of the water and finally closes the exhaust hole, so that in the subsequent use process, the water will not be discharged from the exhaust hole. Because the float cavity and the water inlet channel are always in a connected state, each time the filter unit is turned on and operated, the water in the float cavity will be renewed during the water intake process, ensuring the water quality.

[0019] The present application can realize automatic exhaust through the first water flow, without the need for separate manual exhaust operation, and the exhaust hole is automatically sealed by the exhaust valve after one exhaust, preventing water from being discharged from the exhaust hole, thereby achieving sealing. The entire operation can be completed without the user paying special attention, thereby improving the user experience.

[0020] 2. As a preferred embodiment of the present application, the float chamber is arranged on the water-proof upper cover, so as to simplify the structural design of the end cover and avoid the end cover thickness being too large. When the size of the filter bottle is constant, the reduction of the end cover thickness helps to increase the structural size of the filter element part, thereby increasing the filter element flux and improving the filtration efficiency.

[0021] A seal is sandwiched between the water-proof upper cover and the end cover, so that the exhaust path is for the gas to pass through the water inlet channel, the flow channel, the air inlet channel, the float chamber and then be discharged from the exhaust hole. That is, the presence of the seal can make the gas be discharged through the end cover as much as possible, reducing the residual gas in the water inlet channel and the end cover, avoiding the generation of air pressure in the filter chamber that can push water through the ultrafiltration membrane, thereby avoiding dripping from the faucet when the water outlet is turned off.

[0022] 3. As a preferred embodiment of the present application, part of the float cavity is located in the cavity above the secondary filter element. This embodiment utilizes the redundant space in the filter element to realize the arrangement of the float cavity, making the structure of the entire filter bottle more compact, which helps to miniaturize the filter element assembly, thereby helping to realize the miniaturized design of the entire water purifier.

[0023] 4. As a preferred embodiment of the present application, the exhaust valve includes a valve core and a floating member that drives the valve core to move. The floating member drives the valve core to move upward under the action of the buoyancy in the float chamber to close the exhaust hole. Compared with embodiments such as a float, the present application achieves the closure of the exhaust hole through the cooperation of the floating member and the valve core. The closed state is more stable. As long as there is enough water in the float chamber to keep the floating member at a preset position, the exhaust hole is in a state of being closed by the valve core, thereby avoiding water leakage.

[0024] 5. As a preferred embodiment of the present application, the end cover is provided with a plurality of exhaust channels, which facilitates the rapid discharge of gas, avoids the formation of high pressure in the end cover and affects the entry of water, and ensures the normal operation of the filter unit when using water for the first time.

[0025] 6. As a preferred embodiment of the present application, the exhaust valve includes a valve core and a floating part that drives the valve core to move. The floating part drives the valve core to move upward under the action of the buoyancy in the float chamber to close the exhaust hole. The valve core and the floating part are detachably connected, so that the valve core can be installed to the end cover alone before the floating part is installed. The whole installation process is convenient and quick, which helps to improve assembly efficiency. The detachable connection between the two also facilitates the disassembly and replacement of the floating part, thereby reducing maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0027] Figure 1 A cross-sectional view of an exhaust hole of a water purifier in an open state for exhausting air in one embodiment of the present application;

[0028] Figure 2 for Figure 1 A magnified view of part A;

[0029] Figure 3 This is a cross-sectional view of a water purifier in an embodiment of the present application when the exhaust hole is in a closed state;

[0030] Figure 4 for Figure 3 A magnified view of part B;

[0031] Figure 5 A three-dimensional diagram of a lower end cover according to an embodiment of the present application;

[0032] Figure 6 A cross-sectional view of a lower end cover according to an embodiment of the present application;

[0033] Figure 7 This is a three-dimensional diagram of a valve core in one embodiment of the present application;

[0034] Figure 8 A cross-sectional view of a valve core according to an embodiment of the present application;

[0035] Fig. 9 This is a three-dimensional diagram of a connector according to an embodiment of the present application.

[0036] in,

[0037] 1. End cover; 11. Air inlet channel; 111. First air inlet; 112. Second air inlet; 113. Connecting port; 12. Exhaust channel; 13. Air hole; 14. Exhaust hole; 15. Guide column; 16. Sliding channel; 17. Stop step;

[0038] 2. Waterproof cover; 21. Floating cavity; 22. Main body; 23. Horizontal extension; 24. Vertical extension; 25. Raised strip;

[0039] 3. Primary filter element;

[0040] 4. Secondary filter element;

[0041] 5. filter bottle; 51. water inlet; 52. water outlet; 53. water inlet channel;

[0042] 6. Cavity;

[0043] 7. Exhaust valve; 71. Valve core; 711. First positioning hole; 712. Introducing groove; 713. Guide limiting rib; 72. Floating member; 73. Connecting member; 731. Stop convex rib; 74. Elastic member; 75. Sealing ring;

[0044] 8. Seals;

[0045] 9. Faucet;

[0046] 10. Current passage. DETAILED DESCRIPTION

[0047] In order to more clearly illustrate the overall concept of the present application, a detailed description is given below in an illustrative manner in conjunction with the accompanying drawings.

[0048] In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present application is not limited by the specific embodiments disclosed below. It should be noted that the embodiments of the present application and the features in each embodiment may be combined with each other without conflict.

[0049] In addition, in the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms "top", "bottom", "inside", "outside", "axial", "radial", "circumferential", etc. are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application 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 on the present application.

[0050] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0051] In the present application, unless otherwise clearly specified and limited, a first feature "above" or "below" a second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means 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 application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more embodiments or examples.

[0052] like Figures 1 to 9 As shown, a water purifier includes a filter element assembly, which includes a filter bottle 5 with a filter cavity, a filter element located in the filter cavity, and an end cover 1 for opening or closing the filter cavity, the filter bottle 5 is provided with a water inlet 51 and a water outlet 52 connected to the filter cavity, and a water inlet channel 53 connected to the water inlet 51 is formed between the filter element and the inner wall of the filter bottle 5; the end cover 1 is provided with an air inlet channel 11 and an exhaust hole 14 connected to the water inlet channel 53; the filter cavity is also provided with a water-proof upper cover 2 located between the filter element and the end cover 1, and the water-proof upper cover 2 cooperates with the end cover 1 to form a flow channel 10 connecting the water inlet channel 53 and the air inlet channel 11; the end cover 1 and / or the water-proof upper cover 2 are provided with a float cavity 21, and the filter element assembly also includes an exhaust valve 7 movably arranged on the end cover 1, and the exhaust valve 7 floats up under the buoyancy of water in the float cavity 21 to close the exhaust hole 14.

[0053] When the water purifier is installed, there will be excess air in the filter bottle 5. When in use, raw water flows into the filter bottle 5 through the water inlet 51, and the water level in the filter bottle 5 gradually rises. The air is located above the water surface due to its density and quality. Under the squeeze of the water, the water inlet channel 53 moves upward, enters the air inlet channel 11 through the flow channel 10, and enters the float chamber 21 through the air inlet channel 11, and is finally discharged from the exhaust hole 14. At the beginning of exhaust, there is only air in the float chamber 21, and the exhaust valve 7 does not float upward, so the exhaust hole 14 is not blocked, and the gas can be discharged normally. When the gas is about to be exhausted, water enters the float chamber 21 through the air inlet channel 11 and drives the exhaust valve 7 to float until the exhaust hole 14 is closed.

[0054] In the present application, an air inlet channel 11 and an exhaust hole 14 connected to the filter chamber are provided on the end cover 1 of the filter bottle 5, so that when water is passed into the filter chamber, as much residual gas as possible in the filter chamber can pass through the flow channel 10 and the air inlet channel 11 under the action of water pressure, and then be discharged through the exhaust hole 14, thereby greatly reducing the residual amount of gas in the filter bottle 5, so as to avoid the gas remaining in the filter chamber from forming air pressure, which may cause the water to flow under the action of air pressure when the water supply is turned off, thereby avoiding the dripping phenomenon of the faucet 9 when no water is taken, and improving the user experience.

[0055] The end cap 1 and / or the water-proof upper cover 2 in the present application are provided with a float chamber 21, and the exhaust valve 7 is movably provided on the end cap 1. When the water purifier is used, after the water demand is issued for the first time, water is passed into the filter chamber, and the water flows in the filter chamber through the water inlet channel 53, and pushes the gas to flow through the flow channel 10 to the air inlet channel 11, and finally discharged from the exhaust hole 14. After the water enters the float chamber 21, the exhaust valve 7 floats upward under the buoyancy of the water and finally closes the exhaust hole 14, so that in the subsequent use process, the water will not be discharged from the exhaust hole 14. Because the float chamber 21 and the water inlet channel 53 are always in a connected state, each time the filter unit is turned on and operated, the water in the float chamber 21 will be renewed during the water intake process, ensuring the water quality.

[0056] The present application can realize automatic exhaust through the first water flow, without the need for a separate manual exhaust operation, and after one exhaust, the exhaust hole 14 is automatically sealed by the exhaust valve 7 to prevent water from being discharged from the exhaust hole 14, thereby achieving sealing. The entire operation can be completed without the user having to pay special attention, thereby improving the user experience.

[0057] As a preferred embodiment of the present application, one of the end cap 1 and the filter bottle 5 is provided with an external thread, and the other is provided with an internal thread adapted to the external thread, and the end cap 1 is threadedly connected to the filter bottle 5 through the cooperation of the internal thread and the external thread. Furthermore, the water-proof upper cover 2 is clamped and fixed between the end cap 1 and the filter bottle 5.

[0058] In the present application, the location of the float chamber 21 may be any of the following embodiments:

[0059] Embodiment 1: The float chamber 21 is disposed on the end cover 1 , and a seal 8 is sandwiched between the water-proof upper cover 2 and the end cover 1 , so that the gas passes through the water inlet channel 53 , the flow channel 10 , the air inlet channel 11 , the float chamber 21 and then is discharged through the exhaust hole 14 .

[0060] Embodiment 2: The float chamber 21 includes an upper chamber provided on the end cover 1 and a lower chamber provided on the water-proof upper cover 2. A seal 8 is provided between the water-proof upper cover 2 and the end cover 1, so that the gas is discharged through the water inlet channel 53, the flow channel 10, the air inlet channel 11, the float chamber 21 and then through the exhaust hole 14.

[0061] Implementation method three: Figures 1 to 4 As shown, the float chamber 21 is provided on the waterproof upper cover 2, and a seal 8 is sandwiched between the waterproof upper cover 2 and the end cover 1, so that the gas passes through the water inlet channel 53, the flow channel 10, the air inlet channel 11, the float chamber 21 in sequence and then is discharged through the exhaust hole 14. The float chamber 21 is provided on the waterproof upper cover 2, so that the structural design of the end cover 1 can be simplified, and the thickness of the end cover 1 can be prevented from being too large. When the size of the filter bottle 5 is constant, the reduction of the thickness of the end cover 1 helps to increase the structural size of the filter element part, thereby increasing the filter element flux and improving the filtration efficiency. A seal 8 is sandwiched between the water-proof upper cover 2 and the end cover 1, so that the exhaust path is for the gas to pass through the water inlet channel 53, the flow channel 10, the air inlet channel 11, the float chamber 21 and then be discharged from the exhaust hole 14. That is, the presence of the seal 8 can make the gas be discharged through the end cover 1 as much as possible, reducing the residual gas in the water inlet channel 53 and the end cover 1, avoiding the generation of air pressure in the filter chamber that can push water through the ultrafiltration membrane, thereby avoiding dripping from the water faucet 9 when the power is turned off.

[0062] As a preferred embodiment of the third embodiment, Figure 1 and Figure 3 As shown, the filter element includes a primary filter element 3 and a secondary filter element 4 built into the primary filter element 3. The primary filter element 3 is provided with a cavity 6 located above the secondary filter element 4, and a part of the floating cavity 21 is placed in the cavity 6. This embodiment utilizes the redundant space in the filter element to realize the arrangement of the floating cavity 21, making the structure of the entire filter bottle 5 more compact, which is conducive to the miniaturization of the filter element assembly, thereby helping to realize the miniaturization design of the entire water purifier.

[0063] Preferably, the primary filter element 3 is a PP cotton and / or activated carbon filter element, and the secondary filter element 4 is an ultrafiltration membrane or an RO membrane. Of course, the present application does not exclude the provision of other filter barriers after the secondary filter element 4, such as post-activated carbon, to further improve the filtering effect.

[0064] like Figure 2and Figure 4 As shown, in a specific example, the waterproof cover 2 includes a U-shaped main body 22 for enclosing a float chamber 21, a horizontal extension portion 23 connected to the main body 22 and extending laterally, and a vertical extension portion 24 connected to the horizontal extension portion 23 and extending downwardly, the horizontal extension portion 23 abuts against the upper portion of the primary filter core 3 to clamp the waterproof cover 2 between the end cover 1 and the primary filter core 3, and the vertical extension portion 24 abuts against the side of the primary filter core 3 to limit the radial position of the waterproof cover 2 in the filter chamber.

[0065] Furthermore, the horizontal extension part 23 has a convex strip 25 extending upward, and two adjacent convex strips 25 cooperate to form a positioning groove for accommodating the seal 8; or, the horizontal extension part 23 has a positioning groove recessed downward, and the positioning groove is used to accommodate the seal 8. The positioning groove can be provided to limit the seal 8, so as to prevent the seal 8 from shifting during the assembly process, causing the seal 8 to deviate from the preset position and affect the sealing effect.

[0066] The structure of the exhaust valve 7 in the present application may adopt any one of the following embodiments:

[0067] Embodiment 4: the exhaust valve 7 is a float ball, and the density of the float ball is less than the density of water, so that when water enters the float chamber 21 , the float ball can float upward under the action of the water to close the exhaust hole 14 .

[0068] Implementation method five: Figure 2 and Figure 4 As shown, the exhaust valve 7 includes a valve core 71 and a floating member 72 for driving the valve core 71 to move. The floating member 72 drives the valve core 71 to move upward under the buoyancy of the water in the float chamber 21 to close the exhaust hole 14. Compared with the fourth embodiment, the exhaust hole 14 is closed by the cooperation of the floating member 72 and the valve core 71 in this embodiment, and the closed state is more stable. As long as there is enough water in the float chamber 21 to keep the floating member 72 at a preset position, the exhaust hole 14 is in a state of being closed by the valve core 71, thereby avoiding the occurrence of water leakage.

[0069] As a preferred embodiment of the fifth embodiment, Figure 2 , Figures 4 to 6 As shown, the end cover 1 is provided with a guide column 15 extending downward, the guide column 15 is hollow inside to form a sliding channel 16 for the valve core 71 to slide, and the sliding channel 16 is connected to the exhaust hole 14; the guide column 15 is also provided with an air hole 13 connected to the sliding channel 16; the end cover 1 is also provided with an exhaust channel 12 arranged around the guide column 15, and the exhaust channel 12 is connected to the air hole 13.

[0070] The movement of the valve core 71 is guided and limited by the sliding channel 16, so that the valve core 71 can accurately align with the exhaust hole 14, so that the exhaust hole 14 can be accurately sealed when the valve core 71 reaches the preset position to prevent water leakage at the exhaust hole 14. The sliding channel 16 is connected to the exhaust hole 14, so that a part of the sliding channel 16 constitutes a part of the exhaust path, which simplifies the structural design of the end cover 1. By opening the air hole 13 on the guide column 15, the air entering the exhaust channel 12 can smoothly pass through the air hole 13 into the sliding channel 16, and then be discharged through the exhaust hole 14 through the sliding channel 16, which extends the flow path of the gas, so that the kinetic energy of the gas is lost during the flow process, and the exhaust noise is reduced.

[0071] As a preferred embodiment of the present application, Figure 5 and Figure 6 As shown, a plurality of air inlet channels 11 are arranged at intervals along the circumference of the end cover 1. The air inlet channel 11 includes a first air inlet 111 communicating with the flow channel 10, a second air inlet 112 communicating with the float chamber 21, and a connecting port 113 connecting the first air inlet 111 and the second air inlet 112.

[0072] The arrangement of the exhaust passage 12 in this embodiment may adopt any one of the following examples:

[0073] Example 1: The exhaust channel 12 is connected in a ring shape around the circumference of the guide column 15, and a plurality of air holes 13 are arranged at intervals around the circumference of the guide column 15, that is, one exhaust channel 12 corresponds to a plurality of air holes 13.

[0074] Example 2: A plurality of exhaust channels 12 are provided at intervals around the guide column 15 in the circumferential direction, and a plurality of air holes 13 are provided at intervals around the guide column 15 in the circumferential direction, and one exhaust channel 12 is connected to one air hole 13. Figure 5 and Figure 6 As shown, a plurality of exhaust channels 12 with circular cross sections are arranged around the guide column 15. For another example, a plurality of exhaust channels 12 with arc-shaped cross sections are arranged around the guide column 15. By providing a plurality of exhaust channels 12, it is helpful to quickly discharge the gas, avoid forming a high pressure in the end cover 1 and affecting the entry of water, and ensure the normal operation of the filter unit when the water is used for the first time.

[0075] As a preferred embodiment of the fifth embodiment, Figure 2 and Figure 4As shown, the float chamber 21 is provided on the water-proof upper cover 2, and the projection of the floating member 72 toward the end cover 1 covers the exhaust channel 12. As the water in the float chamber 21 continues to rise, the water level has the possibility of rising into the exhaust channel 12 and entering the sliding channel 16 through the exhaust channel 12. By increasing the lateral size of the floating member 72 so that the projection of the floating member 72 toward the end cover 1 covers the exhaust channel 12, it is possible to avoid water entering the end cover 1 through the exhaust channel 12 when the water level rises, causing water to be retained in the end cover 1, thereby ensuring the water quality.

[0076] The end cover 1 in the fifth embodiment is further provided with a limiting structure for limiting the axial movement distance of the valve core 71 along the exhaust hole 14. The limiting structure can adopt any one of the following embodiments:

[0077] Example 1: Figure 2 and Figure 4 As shown, a stop step 17 is provided in the exhaust hole 14 , and the stop step 17 can cooperate with the valve core 71 to limit the moving distance of the valve core 71 along the axial direction of the exhaust hole 14 .

[0078] Embodiment 2: The exhaust hole 14 is a variable diameter structure with a smaller upper portion and a larger lower portion, and the valve core 71 moves upward to abut against the inner wall of the exhaust hole 14 to limit the moving distance of the valve core 71 along the axial direction of the exhaust hole 14 .

[0079] Preferably, a sealing ring 75 is sleeved on the upper portion of the valve core 71 , and the sealing ring 75 can abut against the inner wall of the exhaust hole 14 to close the exhaust hole 14 .

[0080] Furthermore, a protrusion is provided at the lower part of the valve core 71 , and an anti-slipping portion is provided in the sliding channel 16 . The protrusion cooperates with a stopper of the anti-slipping portion to limit the valve core 71 from slipping out from the lower part of the guide column 15 .

[0081] As a preferred implementation of the present application, Figure 2 and Figure 4 As shown, the exhaust valve 7 includes a valve core 71 and a floating member 72 for driving the valve core 71 to move. The floating member 72 floats up under the buoyancy of the water in the float chamber 21, and the valve core 71 and the floating member 72 are detachably connected. In this way, the valve core 71 can be installed to the end cover 1 alone, and then the floating member 72 can be installed. The whole installation process is convenient and fast, which helps to improve the assembly efficiency. In addition, the detachable connection between the two also facilitates the disassembly and replacement of the floating member 72, reducing the maintenance cost.

[0082] In this embodiment, the connection between the valve core 71 and the floating member 72 can be any one of the following embodiments:

[0083] Embodiment 3: The lower part of the valve core 71 is provided with an external thread, and the floating member 72 is provided with an internal thread adapted to the external thread. The valve core 71 and the floating member 72 are threadedly connected via the external thread and the internal thread.

[0084] Embodiment 4: One of the valve core 71 and the floating member 72 is provided with a latching tongue, and the other is provided with a buckle position matched with the latching tongue, and the valve core 71 and the floating member 72 are snap-fitted together through the latching tongue and the buckle position.

[0085] Embodiment 5: The valve core 71 is provided with a first mounting hole, the floating member 72 is provided with a second mounting hole, and the valve core 71 and the floating member 72 are connected by fasteners (such as screws) penetrating the first mounting hole and the second mounting hole.

[0086] Example 6: Figure 2 , Figure 4 , Figures 7 to 9 As shown, the exhaust valve 7 also includes a connecting member 73, the valve core 71 is provided with a first positioning hole 711 adapted to the connecting member 73, the floating member 72 is provided with a second positioning hole adapted to the connecting member 73, and the valve core 71 is further provided with an elastic member 74 for driving the connecting member 73 to move along the axial direction of the first positioning hole 711 so that a part of the connecting member 73 extends into the second positioning hole. The connection between the valve core 71 and the floating member 72 is achieved through the connecting member 73, and during operation, the connecting member 73 can move along the axial direction of the first positioning hole 711 to extend into the second positioning hole of the floating member 72, and the floating member 72 is stopped and limited by the connecting member 73 so that the floating member 72 maintains the connection with the valve core 71, thereby realizing screw-free assembly, and the entire assembly process does not require the aid of tooling, which is convenient and easy, and helps to improve assembly efficiency.

[0087] Preferably, the elastic member 74 is a spring. The elastic member 74 drives the connecting member 73 to move, so that when the second positioning hole is aligned with the first positioning hole 711, the connecting member 73 can automatically pop out under the elastic force of the elastic member 74 to extend into the second positioning hole, thereby realizing the rapid assembly between the floating member 72 and the valve core 71.

[0088] As a preferred example of this embodiment 6, Figures 7 to 9 As shown, the connecting member 73 is provided with a stop rib 731 on the outside, the valve core 71 is provided with an introduction groove 712 adapted to the stop rib 731, and the inner wall of the valve core 71 is provided with a guide limit rib 713 protruding inwardly, and the connecting member 73 can rotate along the first positioning hole 711 to make the stop rib 731 slide along the guide limit rib 713, and the stop rib 731 and the inner wall of the valve core 71 are stopped to limit the connecting member 73 from coming out of the first positioning hole 711. Such an arrangement can prevent the connecting member 73 from coming out of the valve core 71, and ensure the stability and reliability of the connection between the valve core 71 and the floating member 72.

[0089] Specifically, during the assembly of the valve core 71 and the floating member 72, the connecting member 73 is first installed toward the valve core 71 along the guide groove 712. After the connecting member 73 is pushed toward the first positioning hole 711, it can be retracted into the first positioning hole 711. After the elastic member 74 is compressed, it is rotated by a certain angle (for example, 90°) so that the stop rib 731 can be directly opposite to the track formed by the guide limit rib 713. The floating member 72 is inserted through the lower end of the valve core 71 until the second positioning hole is aligned with the first positioning hole 711. The connecting member 73 automatically pops out under the action of the elastic member 74 so that one end of it extends into the second positioning hole. At this time, the stop rib 731 and the inner wall of the valve core 71 stop to limit the connecting member 73 from escaping from the first positioning hole 711, thereby achieving a stable connection between the valve core 71 and the floating member 72 through the connecting member 73.

[0090] Anything not described in this application can be achieved by adopting or drawing on existing technologies.

[0091] The various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referenced to each other, and each embodiment focuses on the differences from other embodiments.

[0092] The above is only an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

1. A water purifier, comprising a filter element assembly, wherein the filter element assembly comprises a filter bottle having a filter cavity, a filter element located in the filter cavity, and an end cap for opening or closing the filter cavity, the filter bottle is provided with a water inlet and a water outlet communicating with the filter cavity, and a water inlet channel communicating with the water inlet is formed between the filter element and the inner wall of the filter bottle; characterized in that: The end cover is provided with an air inlet channel and an exhaust hole connected with the water inlet channel; the filter chamber is also provided with a water-proof upper cover located between the filter element and the end cover, and the water-proof upper cover and the end cover cooperate to form a flow channel connecting the water inlet channel and the air inlet channel; the end cover and / or the water-proof upper cover are provided with a float cavity, and the filter element assembly also includes an exhaust valve movably arranged on the end cover, and the exhaust valve floats up under the buoyancy of water in the float cavity to close the exhaust hole.

2. A water purifier according to claim 1, characterized in that: The float chamber is arranged on the water-proof upper cover, and a sealing member is sandwiched between the water-proof upper cover and the end cover, so that the gas is discharged through the exhaust hole after passing through the water inlet channel, the flow channel, the air inlet channel, the float chamber in sequence.

3. A water purifier according to claim 2, characterized in that: The filter element comprises a primary filter element and a secondary filter element built in the primary filter element. A cavity located above the secondary filter element is provided in the primary filter element, and a partial area of ​​the float cavity is placed in the cavity.

4. A water purifier according to claim 1, characterized in that: The exhaust valve comprises a valve core and a floating member driving the valve core to move. The floating member drives the valve core to move upward under the buoyancy of water in the float chamber to close the exhaust hole.

5. A water purifier according to claim 4, characterized in that: The end cover is provided with a guide column extending downward, the guide column is hollow inside to form a sliding channel for the valve core to slide, and the sliding channel is connected to the exhaust hole; the guide column is also provided with an air hole connected to the sliding channel; The end cover is also provided with an exhaust passage arranged around the guide column, and the exhaust passage is communicated with the air hole.

6. A water purifier according to claim 5, characterized in that: The float chamber is arranged on the water-proof upper cover, and the projection of the floating member toward the end cover covers the exhaust passage.

7. A water purifier according to claim 4, characterized in that: A stop step is provided in the exhaust hole, and the stop step can cooperate with the valve core stop to limit the moving distance of the valve core along the axial direction of the exhaust hole; or, The exhaust hole is a variable diameter structure with a smaller upper portion and a larger lower portion. The valve core moves upward to abut against the inner wall of the exhaust hole to limit the moving distance of the valve core along the axial direction of the exhaust hole.

8. A water purifier according to claim 1, characterized in that: The exhaust valve comprises a valve core and a floating member driving the valve core to move, the floating member floats up under the buoyancy of water in the float chamber, and the valve core is detachably connected to the floating member.

9. A water purifier according to claim 8, characterized in that: The exhaust valve also includes a connecting piece, the valve core is provided with a first positioning hole adapted to the connecting piece, the floating piece is provided with a second positioning hole adapted to the connecting piece, and the valve core is also provided with an elastic piece for driving the connecting piece to move axially along the first positioning hole so that a partial area of ​​the connecting piece extends into the second positioning hole.

10. A water purifier according to claim 9, characterized in that: The connecting piece is provided with a stop rib on the outside, the valve core is provided with a guide groove adapted to the stop rib, and the inner wall of the valve core is provided with a guide limit rib protruding inwardly, the connecting piece can rotate along the first positioning hole to make the stop rib slide along the guide limit rib, and the stop rib stops the inner wall of the valve core to limit the connecting piece from escaping from the first positioning hole.

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