A filter element seat and a filter element with automatic water sealing

Abstract

The present invention provides a filter element seat with automatic water sealing, which includes a valve seat, a second water stop valve core, a second compression spring and an end cover. One end of the second water stop valve core is inserted into the valve seat, and the other end abuts against the end cover through the second compression spring. The second water stop valve core includes two parts corresponding to the water outlet and the water inlet respectively. The present invention realizes the automatic water sealing function of the filter element seat by using the second compression spring to push the second water stop valve core to seal the water flow channels of the water inlet and the water outlet. The present invention also provides a filter element with automatic water sealing, which includes a filter bottle, a filter element component and a filter element seat. The filter element component includes a filter element, a first water stop valve core, a first compression spring, a filter element cover and an inner cover of the filter bottle. The present invention realizes the linkage closing and opening of the water inlet and outlet ends through the elastic force of the first compression spring and the installation of the filter element seat, effectively avoiding the outflow of the residual water inside the filter element; at the same time, it can avoid the phenomenon of water leakage caused by the incomplete rotation of the existing closing and water sealing structure realized by rotation.

Description

Technical Field

[0001] The present invention relates to the field of water purification equipment, and particularly to a filter element seat with automatic water sealing. The present invention also provides a filter element with automatic water sealing including the filter element seat. Technical Background

[0002] Currently, for water purifiers with similar snap-in filter elements, the structural layout of the filter element seat and the filter element assembly is such that the filter element seat (or the water circuit board) is on top with the interfaces facing downwards, and the snap-in filter element assembly is below the filter element seat (or the water circuit board) with the interfaces facing upwards. When replacing the filter element, the water source is cut off. Since the filter element seat (or the water circuit board) is in the upper part of the machine, no water will flow out. When the filter element assembly is taken out, since the interfaces face upwards, the water in the filter bottle will not flow out either. Due to the lack of a water stop valve structure, this snap-in filter element can only be arranged in this single way in the water purifier.

[0003] In view of the continuous development and diversification of the current water purifier market, and the continuous improvement of users' usage experience, it is more urgent to develop a water purifier in which the filter element can be directly extracted from the upper part of the water purifier for more convenient replacement of the filter element. However, for snap-in filter elements with this inverted layout, there is a problem that when replacing the filter element assembly, the filter element assembly and the filter element seat (or the water circuit board supporting the snap-in filter element) need to solve the problem of residual water flowing out inside.

[0004] The invention patent with the authorized announcement number CN105080191B discloses a filter element device and a filter element seat, and specifically discloses that the filter element device includes a seat body and a filter element. A plurality of first water flow channels are formed in the seat body, and the filter element has a plurality of water ports corresponding to the first water flow channels. It is characterized in that the filter element device further includes a water blocking member located between the seat body and the filter element. A plurality of second water flow channels corresponding to the plurality of first water flow channels and the plurality of water ports are arranged on the water blocking member. The water blocking member can rotate relative to the seat body so that there is a conducting position or a cutoff position between the water blocking member and the seat body. In the conducting position, the second water flow channels are communicated with the first water flow channels. In the cutoff position, at least one of the second water flow channels changes its relative circumferential position to be disconnected from the first water flow channels. Among them, the plurality of second water flow channels include an influent channel, a concentrated water channel, and an effluent channel. In the cutoff position, the influent channel and the concentrated water channel respectively change their relative circumferential positions to be disconnected from the corresponding first water flow channels. The effluent channel is located at the rotation center of the water blocking member, and a first check valve with an opening pressure is arranged between the effluent channel and the corresponding first water flow channel. A second check valve with an opening pressure is arranged on the concentrated water port of the filter element. When it is necessary to separate the filter element from the seat body in the above patent, the water blocking member can be rotated relative to the seat body, so that a cutoff position is formed between the water blocking member and the seat body, that is, at this time, at least one second water flow channel is disconnected from the corresponding first water flow channel. Thus, it is possible to prevent the residual water from leaking out through the disconnected water flow channels. However, the above patent can only achieve a single water sealing function and cannot realize the linkage closing and opening of the inlet and outlet ports. At the same time, when using rotation for water sealing, it is easy to occur that the rotation is not in place, resulting in a deviation in the water stopping position and water leakage. Summary of the Invention

[0005] To solve the technical problems that the linkage water sealing of the inlet and outlet ports cannot be achieved and water leakage occurs due to deviation in water sealing.

[0006] The present invention provides a filter element seat with automatic water sealing, which includes a valve seat, a second water stop valve core, a second compression spring, and an end cover. An inlet port is provided on one side of the valve seat, and an outlet port is provided on the opposite side. The inlet port and the outlet port are communicated through a water flow channel. One end of the valve seat is hermetically connected to the end cover through a sealing ring, and the opposite end is clamped to a filter bottle. One end of the second water stop valve core is inserted into the valve seat, and the other end abuts against the end cover through the second compression spring. The second water stop valve core includes two parts corresponding to the outlet port and the inlet port respectively, and the second compression spring pushes the second water stop valve core to seal the water flow channels of the inlet port and the outlet port.

[0007] Further, the second water stop valve core corresponding to the water outlet is located in the middle of the valve seat and is coaxially arranged with the filter bottle, and the second water stop valve core corresponding to the water inlet is located on the side of the valve seat close to the water inlet.

[0008] Further, a stop step is provided in the valve seat. The stop step is coaxially arranged with the second water stop valve core located in the middle of the valve seat, and the stop step is communicated with the water outlet through a water flow channel. When there is no external force, the end of the second water stop valve core away from the second compression spring extends into the stop step, and the water flow channel of the water outlet is sealed. When there is an external force, the end of the second water stop valve core away from the second compression spring abuts against the bottom end of the stop step, the second compression spring is compressed, and the water flow channel of the water outlet is opened.

[0009] Further, a third step and a third sealing gasket are provided on the second water stop valve core. One end of the third step abuts against the second compression spring, and a third sealing gasket is installed at the opposite end.

[0010] Beneficial effects:

[0011] 1. In the present invention, through the cooperation of the valve seat, the second water stop valve core, the second compression spring and the end cover, the opening and closing of the water inlet and outlet of the filter element seat can be realized. Specifically, the elastic force generated by the second compression spring restoring its original length pushes the two second water stop valve cores to move upward, so that the two second sealing gaskets are respectively in contact with the water flow channels of the water inlet and the water outlet, realizing the opening and closing of the water inlet and outlet.

[0012] 2. In the present invention, through the limitation of the positions of the two second water stop valve cores, the water flow channels of the inlet and outlet do not interfere with each other; through the setting of the third step and the third sealing gasket, the stable expansion and contraction of the second compression spring can be ensured, and at the same time, the water sealing effect of the water inlet and the water outlet can be improved.

[0013] The present invention also provides a filter element with automatic water sealing, including a filter bottle, a filter element component and a filter element seat. The filter element component is installed in the filter bottle, and the filter element seat is installed at the front end of the filter bottle and assembled with the filter element component.

[0014] Further, the water inlet is communicated with the water inlet end of the filter element component through a water flow channel, and the water outlet is communicated with the water outlet end of the filter element component through a water flow channel.

[0015] Further, the filter element component includes a filter element, a first water stop valve core, a first compression spring, a filter element cover and an inner cover of the filter bottle. The filter element, the filter element cover and the inner cover of the filter bottle are installed in sequence, and the inner cover of the filter bottle is close to the front end of the filter bottle. A communicating accommodation cavity is provided in the middle of the filter element cover and the inner cover of the filter bottle. The first water stop valve core is slidably installed in the accommodation cavity. A first sealing pad is provided at one end of the first water stop valve core close to the filter element. A first step is provided near the middle of the first water stop valve core. A second sealing pad is provided on the side of the first step away from the filter element cover. A first compression spring is sleeved on the first water stop valve core. One end of the first compression spring abuts against the filter element cover, and the other end abuts against one end of the first step away from the second sealing pad. A second step is further provided on the first water stop valve core, and the second step is located between the first sealing pad and the first step. When the filter element seat is in the uninstalled state, the first compression spring pushes the first sealing pad to contact the filter element cover, the water outlet end is sealed, and at the same time the first compression spring pushes the second sealing pad to contact the end of the inner cover of the filter bottle away from the filter element cover, and the water inlet end is sealed; when the filter element seat is in the installed state, the stop step on the filter element seat pushes the first water stop valve core to slide toward the filter element side, the first compression spring is compressed, the second step abuts against the end of the filter element cover away from the filter element, the second sealing pad is separated from the inner cover of the filter bottle, the water inlet end is opened, the first sealing pad is separated from the filter element cover, the water outlet end is opened, at the same time the second compression spring is compressed, the water flow channel of the water outlet is opened, and the front end of the filter bottle pushes another second compression spring to be compressed, and the water flow channel of the water inlet is opened.

[0016] Further, a first groove is provided at the mating portion of the first water stop valve core and the stop step, and a first sealing ring is installed in the first groove. The first water stop valve core and the stop step are slidably sealed by the first sealing ring.

[0017] Further, a second groove is further provided on the first water stop valve core, and the second groove is located between the second step and the first sealing pad. A second sealing ring is provided in the second groove. The first water stop valve core is slidably and sealingly connected to the filter element cover through the second sealing ring.

[0018] Further, the filter element cover and the filter element are sealed by a fourth sealing pad, and the inner cover of the filter bottle and the filter bottle are sealed by a third sealing ring.

[0019] Beneficial effects:

[0020] 1. In the present invention, through the cooperative setting of the filter element, the first water stop valve core, the first compression spring, the filter element cover, the inner cover of the filter bottle, and the first sealing gasket and the second sealing gasket in the filter element component, the linkage closing of the water inlet and outlet ends is realized. Specifically, the elastic force generated by the first compression spring restoring its original length pushes the first water stop valve core towards the front end of the filter bottle, causing the second sealing gasket to contact the lower end of the inner cover of the filter bottle, realizing the closing of the water inlet end. At the same time, due to the downward movement of the first water stop valve core, the first sealing gasket will contact the filter element cover, realizing the closing of the water outlet end, effectively avoiding the outflow of residual water inside the filter element. Combined with the setting of the filter element seat, the opening of the water inlet and outlet ends can be realized, and the communication from the water inlet to the water outlet can be achieved. Specifically, through the installation of the filter element seat, the stop step on the filter element seat pushes the first water stop valve core towards the filter element direction, further compressing the first compression spring, separating the second sealing gasket from the lower end of the inner cover of the filter bottle, realizing the opening of the water inlet end, separating the first sealing gasket from the filter element cover, realizing the opening of the water outlet end. At the same time, the second compression spring is further compressed, realizing the opening of the water flow channel at the water outlet, and the front end of the filter bottle pushes another second compression spring to be further compressed, realizing the opening of the water flow channel at the water inlet. The structure of the present invention is simple, highly reliable, and stable, and can avoid the phenomenon of water leakage caused by the deviation of the water stop position due to the incomplete rotation of the closing and water stop structure realized by rotation in the past.

[0021] 2. In the present invention, through the setting of the stop step, the stable movement of the first water stop valve core can be ensured, and then the first compression spring and the second compression spring can expand and contract smoothly, greatly improving the closing effect of the water inlet and outlet ends and preventing the occurrence of water leakage. Through the sliding sealing setting of the first groove and the installed first sealing ring with the stop step, it can effectively prevent the water that has not been filtered by the filter element from directly flowing into the water outlet between the stop step and the first water stop valve core.

[0022] 3. In the present invention, through the setting of the second step, the movement of the first water stop valve core towards the filter element can be restricted, and at the same time, there is no requirement for the elastic coefficient of the first compression spring and the second compression spring, improving the adaptability of the entire device.

[0023] 4. In the present invention, through the setting of the second groove and the installed second sealing ring, it can effectively prevent the filtered water from flowing back into the water inlet between the first water stop valve core and the filter element cover.

[0024] 5. In the present invention, through the setting of the fourth sealing gasket and the third sealing ring, the sealing effect can be further ensured, and it is ensured that there will be no water leakage phenomenon. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0026] Figure 2 is Figure 1Schematic diagram of the detailed structure at position A in [the figure].

[0027] Figure 3 Schematic diagram of the installation structure of the filter bottle and filter element components of the present invention.

[0028] Figure 4 is Figure 3 Schematic diagram of the detailed structure at position B in [the figure].

[0029] Figure 5 Schematic diagram of the filter element seat structure of the present invention.

[0030] Figure 6 Schematic diagram of the water flow channel of the present invention.

[0031] Reference numerals: 1, filter element components; 11, filter element; 12, first water stop valve core; 13, filter element cover; 14, inner cover of the filter bottle; 15, first sealing gasket; 16, first compression spring; 17, second sealing gasket; 2, filter bottle; 3, filter element seat; 31, valve seat; 32, second water stop valve core; 33, water inlet; 34, second compression spring; 35, water outlet; 36, third sealing gasket; 37, end cover. Specific embodiments

[0032] The following combines the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the protection scope of the present invention.

[0033] The present invention provides a filter element seat with automatic water sealing. The specific technical solution is as Figure 1 、 Figure 5As shown, it includes a valve seat 31, a second water stop valve core 32, a second compression spring 34 and an end cover 37. A water inlet 33 is provided on one side of the valve seat 31, and a water outlet 35 is provided on the other side opposite thereto. The end cover 37 is located at the bottom end of the valve seat 31 and is plugged into the valve seat 31 through a sealing ring. The top end of the valve seat 31 is snap-fitted with the filter bottle 2. The plugging direction of the end cover 37 is along the central axis of the filter bottle 2. One end of the second water stop valve core 32 is plugged into the valve seat 31, and the other end is abutted against the end cover 37 through the second compression spring 34. The second water stop valve core 32 includes two corresponding to the water outlet 35 and the water inlet 33, respectively, and the water outlet 35 The connected second water-stop valve core 32 is located in the middle of the valve seat 31, and the second water-stop valve core 32 connected to the water inlet 33 is located on the side of the valve seat 31 close to the water inlet 33; the second compression spring 34 pushes the second water-stop valve core 32 upward under the action of elastic force, thereby sealing the water flow channel of the water inlet 33 and the water outlet 35; in order to ensure that the elastic force of the second compression spring 34 is stable and the expansion and contraction direction remains a straight line, preferably, a third step is provided on the second water-stop valve core 32. In addition, in order to ensure the sealing effect of the water flow channel of the water inlet 33 and the water outlet 35, a third sealing gasket 36 is installed on the side of the third step away from the second compression spring 34.

[0034] like Figure 1 、 Figure 5 As shown, preferably, a stop step is provided on the valve seat 31, and the stop step is coaxially arranged with the second water stop valve core 32 located in the middle. When the filter element seat 3 is in a state without external force, the second water stop valve core 32 is away from the end of the second compression spring 34 and extends into the stop step, and the water flow channel of the water outlet 35 is sealed; when the filter element seat 3 is under the action of external force, the second water stop valve core 32 is away from the end of the second compression spring 34 and abuts against the bottom end of the stop step, the second compression spring 34 is further compressed, and the water flow channel of the water outlet 35 is opened. At the same time, the other second compression spring 34 is further compressed under the action of the front end of the filter bottle 2, and the water flow channel of the water inlet 33 is opened.

[0035] The present invention also provides a filter element with automatic water sealing, and the specific technical solution is as follows: Figure 1 As shown, it includes a filter bottle 2, a filter element component 1 and a filter element seat 3. The structure and effect of the filter element seat 3 are as described above. The filter element component 1 is installed in the filter bottle 2, and the filter element seat 3 is installed at the front end of the filter bottle 2 and assembled with the filter element component 1. Specifically, the filter element seat 3 can be plugged into the filter bottle 2 and the filter element component 1. The water inlet 33 is connected to the water inlet end of the filter element component 1 through the water flow channel, and the water outlet 35 is connected to the water outlet end of the filter element component 1 through the water flow channel; Figure 2 、 Figure 3 、 Figure 4As shown in the figure, the filter element component 1 includes a filter element 11, a first water stop valve core 12, a first compression spring 16, a filter element cover 13 and an inner cover 14 of the filter bottle. The filter element 11, the filter element cover 13 and the inner cover 14 of the filter bottle are installed in sequence from top to bottom. The inner cover 14 of the filter bottle is close to the front end of the filter bottle 2. The filter element cover 13, the inner cover 14 of the filter bottle, the filter bottle 2 and the filter element 11 are coaxially arranged. A connected accommodating cavity is provided at the middle part, i.e., the central axis, of the filter element cover 13 and the inner cover 14 of the filter bottle. The first water stop valve core 12 is slidably installed in the accommodating cavity. A first sealing pad 15 is provided at one end of the first water stop valve core 12 close to the filter element 11. The first water stop valve core 12 is of a hollow structure, and the hollow part is for the water filtered by the filter element 11 to pass through. A first step is provided near the middle of the first water stop valve core 12, and the first step is located on the outer surface of the first water stop valve core 12. A second sealing pad 17 is provided on one side of the first step away from the filter element cover 13, i.e., near the lower end part of the first water stop valve core 12. The second sealing pad 17 moves freely in the inner cover 14 of the filter bottle. A first compression spring 16 is sleeved on the first water stop valve core 12. One end of the first compression spring 16 abuts against the lower end of the filter element cover 13, and the other end abuts against one end of the first step away from the second sealing pad 17. A second step is further provided on the first water stop valve core 12, and the second step is located between the first sealing pad 15 and the first step. The specific working principle is as follows. As Figure 3 and Figure 4 shown, when the filter element seat 3 is in an uninstalled state, the first compression spring 16 returns to its original length and generates an elastic force. Since the upper filter element cover 13 is fixed, the elastic force will push the first water stop valve core 12 downward through the first step, so that the second sealing pad 17 contacts the end of the inner cover 14 of the filter bottle away from the filter element cover 13 to form a seal, thereby sealing the water inlet end and preventing the residual water inside from flowing back. At the same time, the first water stop valve core 12 will drive the first sealing pad 15 to move downward to contact the filter element cover 13, thereby sealing the water outlet end and preventing the residual water in the filter element from flowing out. As Figure 1 and Figure 2 shown, when the filter element seat 3 is in an installed state, the stop step of the filter element seat 3 lifts the first water stop valve core 12 and pushes the first water stop valve core 12 to slide toward the filter element 11 side. The first compression spring 16 is further compressed. The second step abuts against the end of the filter element cover 13 away from the filter element 11. The second sealing pad 17 is separated from the inner cover 14 of the filter bottle. The water inlet end is opened. The first sealing pad 15 is separated from the filter element cover 13. The water outlet end is opened. At the same time, the second compression spring 34 is further compressed. The water flow channel of the water outlet 35 is opened. The front end of the filter bottle 2 pushes another second compression spring 34 to be further compressed. The water flow channel of the water inlet 33 is opened. At this time, the water inlet end and the water outlet end of the filter element component 1 will be respectively communicated with the water inlet 33 and the water outlet 35 of the filter element seat 3 to form a complete water flow channel. As Figure 6As shown in the figure above, in the above solution, the second step is provided to limit the movement of the first water stop valve core 12 towards the filter element 11. At the same time, due to the existence of the second step, regardless of whether the elastic coefficient of the second compression spring 34 is greater than that of the first compression spring 16, the second water stop valve core 32 will always move downward under the action of the first water stop valve core 12, thereby ensuring the opening of the water outlet 35 and improving adaptability.

[0036] As Figure 2 shown, a first groove is provided at the mating part of the first water stop valve core 12 and the stop step. A first sealing ring is installed in the first groove. The first water stop valve core 12 and the stop step are slidably sealed through the first sealing ring, effectively preventing the water that has not been filtered by the filter element 11 from directly flowing into the water outlet 3 between the stop step and the first water stop valve core 12.

[0037] As Figure 4 shown, a second groove is further provided on the first water stop valve core 12. The second groove is located between the second step and the first gasket 15. A second sealing ring is provided in the second groove. The first water stop valve core 12 is slidably sealed and connected to the filter element cover 13 through the second sealing ring, effectively preventing the filtered water from flowing back into the water inlet end between the first water stop valve core 12 and the filter element cover 13.

[0038] As Figure 1 、 Figure 2 shown, in addition, to ensure the sealing performance of the entire device, each connection is sealed through gaskets or sealing rings. For example, the filter element cover 13 and the filter element 11 are sealed through a fourth gasket. The inner cover 14 of the filter bottle and the filter bottle 2 are sealed through a third sealing ring. A plurality of fourth sealing rings are provided on the outer side of the front end of the filter bottle 2 close to the filter bottle 2. The plurality of fourth sealing rings are spaced apart along the central axis direction of the filter bottle 2. The filter element seat 3 and the front end of the filter bottle 2 are sealed through a plurality of fourth sealing rings.

[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Any other modifications or equivalent replacements made by those of ordinary skill in the art to the technical solutions of the present invention should be covered within the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solutions of the present invention.

Claims

1. An automatically water-sealing filter element seat, comprising a valve seat (31), a second water-stop valve element (32), a second compression spring (34) and an end cover (37). An inlet (33) is provided on one side of the valve seat (31), and an outlet (35) is provided on the opposite side. The inlet (33) and the outlet (35) are communicated through a water flow channel. One end of the valve seat (31) is hermetically connected to the end cover (37) through a sealing ring, and the opposite end is snap-connected to the filter bottle (2). It is characterized in that, One end of the second water stop valve core (32) is inserted into the valve seat (31), and the other end abuts against the end cover (37) through the second compression spring (34). The second water stop valve core (32) includes two parts corresponding to the water outlet (35) and the water inlet (33) respectively. The second compression spring (34) pushes the second water stop valve core (32) to seal the water flow channels of the water inlet (33) and the water outlet (35). The second water stop valve core (32) corresponding to the water outlet (35) is located in the middle of the valve seat (31) and is coaxially arranged with the filter bottle (2). The second water stop valve core (32) corresponding to the water inlet (33) is located on the side of the valve seat (31) close to the water inlet (33).

2. The automatic water-sealing filter element seat according to claim 1, characterized in that, A stop step is provided in the valve seat (31). The stop step is coaxially arranged with the second water stop valve core (32) located in the middle of the valve seat (31), and the stop step is communicated with the water outlet (35) through a water flow channel. When there is no external force, the end of the second water stop valve core (32) away from the second compression spring (34) extends into the stop step, and the water flow channel of the water outlet (35) is sealed. When there is an external force, the end of the second water stop valve core (32) away from the second compression spring (34) abuts against the bottom end of the stop step, the second compression spring (34) is compressed, and the water flow channel of the water outlet (35) is opened.

3. An automatic water-sealing filter element seat according to claim 1 or 2, characterized in that, A third step and a third sealing gasket (36) are provided on the second water stop valve core (32). One end of the third step abuts against the second compression spring (34), and the third sealing gasket (36) is installed at the opposite end.

4. An automatically water-sealing filter element, comprising a filter bottle (2) and a filter element component (1), wherein the filter element component (1) is installed inside the filter bottle (2), and is characterized in that, It further includes a filter element seat (3) as described in claim 3. The filter element seat (3) is installed at the front end of the filter bottle (2) and is assembled with the filter element component (1).

5. The automatic water-sealing filter element according to claim 4, characterized in that, The water inlet (33) is communicated with the water inlet end of the filter element component (1) through a water flow channel, and the water outlet (35) is communicated with the water outlet end of the filter element component (1) through a water flow channel.

6. The automatic water-sealing filter element according to claim 5, wherein, The filter element component (1) includes a filter element (11), a first water stop valve core (12), a first compression spring (16), a filter element cover (13) and an inner cover (14) of the filter bottle. The filter element (11), the filter element cover (13) and the inner cover (14) of the filter bottle are installed in sequence, and the inner cover (14) of the filter bottle is close to the front end of the filter bottle (2). A communicating accommodation cavity is provided in the middle of the filter element cover (13) and the inner cover (14) of the filter bottle. The first water stop valve core (12) is slidably installed in the accommodation cavity. A first sealing pad (15) is provided at one end of the first water stop valve core (12) close to the filter element (11). A first step is provided near the middle of the first water stop valve core (12). A second sealing pad (17) is provided on the side of the first step away from the filter element cover (13). A first compression spring (16) is sleeved on the first water stop valve core (12). One end of the first compression spring (16) abuts against the filter element cover (13), and the other end abuts against one end of the first step away from the second sealing pad (17). A second step is further provided on the first water stop valve core (12). The second step is located between the first sealing pad (15) and the first step. When the filter element seat (3) is in an uninstalled state, the first compression spring (16) pushes the first sealing pad (15) to contact the filter element cover (13), the water outlet end is sealed, and at the same time the first compression spring (16) pushes the second sealing pad (17) to contact the end of the inner cover (14) of the filter bottle away from the filter element cover (13), the water inlet end is sealed; when the filter element seat (3) is in an installed state, the stop step on the filter element seat (3) pushes the first water stop valve core (12) to slide towards the filter element (11) side, the first compression spring (16) is compressed, the second step abuts against the end of the filter element cover (13) away from the filter element (11), the second sealing pad (17) is separated from the inner cover (14) of the filter bottle, the water inlet end is opened, the first sealing pad (15) is separated from the filter element cover (13), the water outlet end is opened, at the same time the second compression spring (34) is compressed, the water flow channel of the water outlet (35) is opened, and the front end of the filter bottle (2) pushes another second compression spring (34) to be compressed, and the water flow channel of the water inlet (33) is opened.

7. The automatic water-sealing filter element according to claim 6, wherein, A first groove is provided at the mating part of the first water stop valve core (12) and the stop step. A first sealing ring is installed in the first groove. The first water stop valve core (12) and the stop step are slidably sealed by the first sealing ring.

8. The automatic water-sealing filter element according to claim 6, characterized in that, A second groove is further provided on the first water stop valve core (12). The second groove is located between the second step and the first sealing pad (15). A second sealing ring is provided in the second groove. The first water stop valve core (12) is slidably and sealingly connected to the filter element cover (13) through the second sealing ring.

9. The automatic water-sealing filter element according to claim 6, wherein, The filter element cover (13) and the filter element (11) are sealed by a fourth sealing pad, and the inner cover (14) of the filter bottle and the filter bottle (2) are sealed by a third sealing ring.

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