Filter element connecting seat, filter element assembly and water purifying device

Abstract

The utility model discloses a filter element connecting seat, a filter element assembly and a water purifying device, and relates to the technical field of water purifying equipment, the filter element connecting seat comprises a connecting seat body, a water stop valve and a sealing ring; the connecting seat body is provided with an overflowing channel, the overflowing channel is provided with a circulating hole section, a straight-face hole section and an inclined-face hole section which are sequentially arranged from top to bottom, and the diameter of the inclined-face hole section is gradually reduced from top to bottom; the water stop valve is movably matched in the overflowing channel; the outer diameter of the sealing ring is smaller than that of the circulation hole section and larger than that of the straight face hole section. When the water stop valve moves upwards to the circulation position, the sealing ring is located in the circulation hole section. When the water stop valve moves downwards to the sealing position, the sealing ring is attached to the straight face hole section and the inclined face hole section at the same time. According to the technical scheme provided by the utility model, the sealing surface of the water stop valve is changed from a single inclined surface to a form of matching the straight surface with the inclined surface, so that the problems that the sealing performance of the connecting seat is poor and water seepage is easy to occur are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of water purification equipment, in particular to a filter element connecting seat, a filter element component and a water purification device. Background Art

[0002] In order to remove pollutants from tap water, water purifiers are increasingly widely used. The filter element is the core component of the water purifier, which is used to separate impurities and pollutants in the water to obtain clean water that can meet production and living needs. The filter element is usually equipped with a connection seat, which is used to build a connection channel between the filter element and the external water inlet and outlet, so that the external water that needs to be filtered and purified can be supplied to the filter element through the connection seat, and the clean water obtained after the filter element is treated can also be exported to the preset water use area through the connection seat.

[0003] However, some current connectors have poor sealing performance and are prone to water seepage, which adversely affects their normal use. Utility Model Content

[0004] The main purpose of the utility model is to provide a filter element connecting seat, aiming to solve the problem that the sealing performance of the connecting seat is poor and water seepage is easy to occur.

[0005] In order to achieve the above-mentioned purpose, the filter element connecting seat proposed by the utility model comprises:

[0006] The connecting seat body is provided with a flow passage, wherein the flow passage comprises a flow hole section, a straight hole section and an inclined hole section which are arranged in sequence from top to bottom, and the diameter of the inclined hole section gradually decreases from top to bottom;

[0007] A water stop valve, movably fitted in the flow passage;

[0008] A sealing ring is sleeved on the water stop valve, and the outer diameter of the sealing ring is smaller than the flow hole section and larger than the straight hole section; when the water stop valve moves upward to the flow position, the sealing ring is located in the flow hole section to allow water to flow in the flow channel; when the water stop valve moves downward to the sealing position, the sealing ring is simultaneously fitted with the straight hole section and the inclined hole section to prevent water from flowing in the flow channel.

[0009] In one embodiment, the filter element connecting seat also includes an elastic member, one end of the elastic member is connected to the connecting seat body, and the other end of the elastic member is connected to the water stop valve; the elastic member is used to apply a downward elastic force to the water stop valve to drive the water stop valve to move to the sealing position.

[0010] In one embodiment, the flow passage passes through the connection seat body in the up-down direction; when the water stop valve is located at the sealing position, the lower end of the water stop valve extends out from the lower end opening of the flow passage.

[0011] In one embodiment, the filter element connecting seat also includes a water sealing cover, which is covered on the connecting seat body and covers the upper end opening of the flow channel; the upper end of the elastic member is connected to the water sealing cover, and the lower end of the elastic member is connected to the water stop valve; a bypass channel is opened on the surface of the connecting seat body, and the bypass channel is connected to the flow hole section.

[0012] In one embodiment, the water sealing cover is fixed to the connecting seat body by ultrasonic welding.

[0013] In one embodiment, the flow passage further comprises a transition hole section, wherein the transition hole section is located between the flow hole section and the straight hole section, and the diameter of the transition hole section gradually decreases from top to bottom.

[0014] In one embodiment, the length of the straight hole segment and the wire diameter of the sealing ring satisfy the following relationship:

[0015] L>w*2 / 3

[0016] Wherein, L is the length of the straight hole segment, and w is the wire diameter of the sealing ring.

[0017] In one embodiment, the angle between the hole wall of the inclined hole segment and the horizontal plane is 45-47°.

[0018] In one embodiment, the diameter of the straight hole segment is 90% to 92% of the outer diameter of the sealing ring.

[0019] The utility model also proposes a filter element assembly, which includes a filter element body and a filter element connecting seat as described above; the connecting seat body of the filter element connecting seat is detachably connected to the filter element body, and the flow channel of the connecting seat body is connected to the filtration channel of the filter element body.

[0020] In one embodiment, the flow channel penetrates the connecting seat body in the up-down direction; when the water stop valve of the filter element connecting seat is in the sealing position, the lower end of the water stop valve extends out from the lower end opening of the flow channel; when the connecting seat body is connected to the filter element body, the filter element body is used to abut the lower end of the water stop valve to push the water stop valve to move upward to the flow position, so that water can flow in the flow channel and the filter channel.

[0021] The utility model also provides a water purification device, which includes the filter element assembly as mentioned above.

[0022] The technical solution of the utility model changes the sealing surface of the water stop valve into a form of a straight hole section combined with a bevel hole section. Since the bevel hole section has a horizontal component, as the water stop valve continues to move downward, the tightness of the fit between the sealing ring and the bevel hole section will continue to increase, thereby ensuring that the sealing ring is tightly attached to the bevel hole section and obtaining a good sealing effect; and the straight hole section can play a guiding role for the sealing ring, and can ensure the concentricity between the sealing ring and the bevel hole section by radially limiting the sealing ring, avoiding the eccentricity of the sealing ring relative to the bevel hole section under the action of the external force driving it to move downward, so that the fitting state between the sealing ring and the bevel hole section can be stably maintained. In this way, through the joint action of the straight hole section and the bevel hole section, the eccentricity of the sealing ring can be avoided while ensuring the tightness of the fit of the sealing ring, thereby improving the sealing quality, effectively reducing the water leakage and seepage defect rate of the filter element connection seat, and greatly improving the product yield. In addition, straight hole sections are easier to measure digitally. Compared with the traditional single inclined surface which is difficult to measure, by measuring the straight hole sections digitally, it is possible to more clearly and accurately determine whether the incoming materials are qualified, thereby further ensuring the sealing effect of the subsequent finished products. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0024] Figure 1 This is a schematic diagram of the exploded structure of an embodiment of a filter element assembly provided by the utility model;

[0025] Figure 2 This is a schematic cross-sectional structure diagram of an embodiment of a filter element connecting seat provided by the utility model when it is in a conducting state;

[0026] Figure 3 for Figure 2 The enlarged schematic diagram of point A in the middle;

[0027] Figure 4 This is a schematic cross-sectional structure diagram of an embodiment of a filter element connecting seat provided by the utility model when it is in a sealed state;

[0028] Figure 5 for Figure 4 A magnified schematic diagram of point B in the middle.

[0029] Description of Figure Numbers:

[0030] 1. Connecting seat body; 11. Flow passage; 111. Flow hole section; 112. Straight hole section; 113. Bevel hole section; 114. Transition hole section; 12. Bypass channel; 2. Water stop valve; 3. Sealing ring; 4. Elastic part; 5. Water sealing cover; 6. Filter element body.

[0031] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0033] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0034] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0035] As described in the background technology, the sealing performance of some connection seats on the filter element is poor and water seepage problems may occur, which has an adverse effect on its normal use. After disassembling and studying the connection seat with water seepage problems, the researchers of this application found that a water stop valve is provided inside the connection seat. With the help of the valve body opening and closing function of the water stop valve, when the connection seat is connected to the filter element, the water stop valve is in an open state. At this time, the connection seat can constitute a connecting channel between the filter element and the external water inlet and outlet, ensuring the normal flow of water between the filter element and the external water inlet and outlet; and after the connection seat is removed from the filter element, the water stop valve is automatically closed. At this time, the flow channel inside the connection seat is in a blocked state, and water cannot flow inside the connection seat in theory.

[0036] After further analysis, the R&D personnel found that the closing of the water stop valve requires the sealing cooperation between the seal on the water stop valve and the flow channel inside the connecting seat, and the sealing surface where the seal contacts the inner wall of the flow channel is usually an inclined surface. The inclined surface can ensure the tightness of the fit between the seal and the inner wall of the flow channel to a certain extent. However, due to the incomplete radial limitation of the water stop valve by the inclined surface, the water stop valve is prone to eccentricity under the action of external force, which affects the sealing quality and causes water seepage in the connecting seat.

[0037] In order to solve the above-mentioned problems existing in the existing connecting seat, the utility model proposes a filter element connecting seat, in which the sealing surface of the water stop valve is changed from a single inclined surface to a straight surface matched with an inclined surface. When the water stop valve is in a sealed state, the sealing ring on the water stop valve fits with the straight surface and the inclined surface at the same time. In this way, the sealing effect of the inclined surface and the guiding effect of the straight surface can be utilized to ensure the tightness and concentricity of the fitting between the sealing ring and the sealing surface, so as to improve the sealing quality and avoid water seepage problems.

[0038] See also Figures 1 to 5 In one embodiment of the utility model, the filter element connecting seat includes:

[0039] The connecting seat body 1 is provided with a flow passage 11, and the flow passage 11 has a flow hole section 111, a straight hole section 112 and an inclined hole section 113 arranged in sequence from top to bottom, and the diameter of the inclined hole section 113 gradually decreases from top to bottom;

[0040] The water stop valve 2 is movably fitted in the flow passage 11;

[0041] The sealing ring 3 is sleeved on the water stop valve 2, and the outer diameter of the sealing ring 3 is smaller than the flow hole section 111 and larger than the straight hole section 112; when the water stop valve 2 moves upward to the flow position, the sealing ring 3 is located in the flow hole section 111 to allow water to flow in the flow channel 11; when the water stop valve 2 moves downward to the sealing position, the sealing ring 3 is simultaneously fitted with the straight hole section 112 and the inclined hole section 113 to prevent water from flowing in the flow channel 11.

[0042] In this embodiment, the flow channel 11 can be regarded as a through hole opened inside the connection seat body 1 according to a preset path, and the flow hole section 111, the straight hole section 112, and the inclined hole section 113 respectively refer to different hole sections in the through hole. It can be understood that two flow channels 11 can be opened on a connection seat body 1, one of which is a water inlet channel and the other is a water outlet channel; the two ends of the water inlet channel are respectively used to connect the external water supply end and the filter channel inlet of the filter element body 6, and the two ends of the water outlet channel are respectively used to connect the external water use area and the filter channel outlet of the filter element body 6; each flow channel 11 is correspondingly provided with a water stop valve 2 and a sealing ring 3 in this embodiment.

[0043] The water stop valve 2 may be in the shape of a rod as shown in the figure, and the maximum diameter of the water stop valve 2 should be smaller than the minimum diameter of the flow hole section 111, the straight hole section 112, and the inclined hole section 113, so as to ensure that the water stop valve 2 can move in the flow channel 11 automatically or manually with the help of corresponding devices and external forces, and does not block the flow channel 11; a sealing groove may be provided on the water stop valve 2 along the circumferential direction so that the sealing ring 3 can be sleeved in the sealing groove, and the outer diameter of the sealing ring 3 should be larger than the maximum diameter of the water stop valve 2 at the corresponding position.

[0044] In actual application, Figure 2 and Figure 3 As shown, when the connecting seat body 1 is connected to the filter element body 6, the water stop valve 2 can move upward to the flow position, so that the sealing ring 3 moves upward with the water stop valve 2 to the flow hole section 111. Since there is a circumferential gap between the outer side of the sealing ring 3 and the hole wall of the flow hole section 111, the flow channel 11 is in a conductive state at this time, and the water body can flow normally in the flow channel 11 and enter and exit the filter element body 6 through the flow channel 11, thereby completing the filtering and purification operation of the water body in the filter element body 6; and after the filtering and purification is completed, the connecting seat body 1 is removed from the filter element body 6, as shown in FIG. Figure 4 and Figure 5 As shown, the water stop valve 2 can move downward to the sealing position, so that the sealing ring 3 moves downward with the water stop valve 2 to fit with the straight hole section 112 and the inclined hole section 113 at the same time. Based on the elastic deformation characteristics of the sealing ring 3, a sealing effect can be formed by fitting with the straight hole section 112 and the inclined hole section 113, so that the flow channel 11 is in a blocked state, and water cannot flow in the flow channel 11, thereby preventing residual water from flowing out of the filter element connecting seat.

[0045] In the above sealing state, since the inclined hole section 113 has a horizontal component, as the water stop valve 2 continues to move downward, the fit tightness between the sealing ring 3 and the inclined hole section 113 will continue to increase, thereby ensuring that the sealing ring 3 is tightly attached to the inclined hole section 113 and obtaining a good sealing effect; and the straight hole section 112 can guide the sealing ring 3, and can ensure the concentricity between the sealing ring 3 and the inclined hole section 113 by radially limiting the sealing ring 3, avoiding the eccentricity of the sealing ring 3 relative to the inclined hole section 113 under the action of the external force driving it to move downward, so that the fit state between the sealing ring 3 and the inclined hole section 113 can be stably maintained. In this way, through the joint action of the straight hole section 112 and the inclined hole section 113, the fit tightness of the sealing ring 3 can be ensured while avoiding the eccentricity of the sealing ring 3, thereby improving the sealing quality, effectively avoiding the water seepage problem of the filter element connection seat, and greatly improving the product yield.

[0046] In addition, the straight hole section 112 is more convenient for digital measurement. Compared with the traditional single inclined surface which is difficult to measure, by performing digital measurement on the straight hole section 112, it is possible to more clearly and accurately determine whether the incoming material is qualified, thereby further ensuring the sealing effect of the subsequent finished product.

[0047] Optionally, refer to Figures 1 to 5 The filter element connecting seat also includes an elastic member 4, one end of the elastic member 4 is connected to the connecting seat body 1, and the other end of the elastic member 4 is connected to the water stop valve 2; the elastic member 4 is used to apply a downward elastic force to the water stop valve 2 to drive the water stop valve 2 to move to the sealing position.

[0048] Specifically, the elastic member 4 can be a spring, a colloid, a damping device, etc., which is not limited here. By providing the elastic member 4, the water stop valve 2 can be automatically reset to the sealing position in the non-working state (that is, when the connecting seat body 1 is not connected to the filter element body 6), eliminating additional manual operations, so that the filter element connecting seat can continuously maintain a sealed state. Among them, the elastic member 4 can be set to be in a pre-stressed state to push the water stop valve 2 to the sealing position through a downward elastic force; the elastic member 4 can also be set to be in a pre-tensioned state to pull the water stop valve 2 to the sealing position through a downward elastic force; this is not limited here.

[0049] Optionally, refer to Figures 1 to 5 The flow passage 11 passes through the connection seat body 1 in the up-down direction; when the water stop valve 2 is located in the sealing position, the lower end of the water stop valve 2 extends out from the lower end opening of the flow passage 11.

[0050] In this embodiment, the upper end opening of the flow channel 11 can be connected to the external water inlet and outlet (when the flow channel 11 is the water inlet channel, the upper end opening of the flow channel 11 is connected to the external water supply end; when the flow channel 11 is the water outlet channel, the upper end opening of the flow channel 11 is connected to the external water use area), and the lower end opening of the flow channel 11 can be connected to the filter channel of the filter element body 6 (when the flow channel 11 is the water inlet channel, the lower end opening of the flow channel 11 is connected to the filter channel inlet of the filter element body 6; when the flow channel 11 is the water outlet channel, the lower end opening of the flow channel 11 is connected to the filter channel outlet of the filter element body 6). When the lower end of the water stop valve 2 extends out from the lower end opening of the flow channel 11, in the process of installing the connecting seat body 1 on the filter element body 6, the water stop valve 2 can be directly pushed upward by the abutment of the filter element body 6 on the extended part of the water stop valve 2; in this way, when the connecting seat body 1 is installed and connected on the filter element body 6, the water stop valve 2 is also moved from the sealing position to the upper flow position under the push of the filter element body 6; based on this structural setting, after the connecting seat body 1 is installed on the filter element body 6, the water filtering and purification operation can be directly carried out without the need for additional manual adjustment of the water stop valve 2, thereby greatly increasing the convenience of use.

[0051] Optionally, refer to Figures 1 to 5 The filter element connecting seat also includes a water sealing cover 5, which covers the connecting seat body 1 and covers the upper end opening of the flow channel 11; the upper end of the elastic member 4 is connected to the water sealing cover 5, and the lower end of the elastic member 4 is connected to the water stop valve 2; a bypass channel 12 is opened on the surface of the connecting seat body 1, and the bypass channel 12 is connected to the flow hole section 111.

[0052] Specifically, by providing the water sealing cover 5, a mounting base can be provided for the elastic member 4, so that the upper end of the elastic member 4 can be mounted on the lower end surface of the water sealing cover 5 in a direct or indirect manner. Since the water sealing cover 5 blocks the upper end opening of the flow passage 11, a bypass channel 12 connected to the flow passage 11 needs to be provided on the outer side wall of the connecting seat body 1, so that the water to be filtered at the external water supply end can be supplied into the flow passage 11 through the bypass channel 12, and the clean water filtered in the flow passage 11 can be guided out to the external water use area through the bypass channel 12.

[0053] Optionally, refer to Figures 1 to 5 The water sealing cover 5 is fixed to the connection seat body 1 by ultrasonic welding. Ultrasonic welding has the advantages of being simple and easy to operate, efficient, and environmentally friendly, and can ensure the connection stability between the water sealing cover 5 and the connection seat body 1.

[0054] Preferably, a sealing member may be provided between the water sealing cover 5 and the upper end opening of the flow passage 11 to prevent water from leaking from the gap between the water sealing cover 5 and the flow passage 11 .

[0055] Optionally, refer to Figures 1 to 5 The flow passage 11 further comprises a transition hole section 114 , which is located between the flow hole section 111 and the straight hole section 112 , and the diameter of the transition hole section 114 gradually decreases from top to bottom.

[0056] By providing a transition hole section 114 with an inclination, it can be ensured that the sealing ring 3 can smoothly slide from the flow hole section 111 with a larger diameter to the straight hole section 112 with a smaller diameter during the downward movement of the water stop valve 2, thereby reducing the wear of the sealing ring 3 caused by the hole wall of the flow channel 11.

[0057] Optionally, refer to Figures 1 to 3 , the length of the straight hole segment 112 and the line diameter of the sealing ring 3 satisfy the following relationship:

[0058] L>w*2 / 3

[0059] Wherein, L is the length of the straight hole segment 112 , and w is the wire diameter of the sealing ring 3 .

[0060] Optionally, refer to Figure 1 The angle α between the hole wall of the inclined hole section 113 and the horizontal plane is 45 to 47°.

[0061] Optionally, refer to Figure 1 The diameter D1 of the straight hole segment 112 is 90% to 92% of the outer diameter D2 of the sealing ring 3 .

[0062] Based on the above-mentioned size limitation, the guiding effect of the straight hole segment 112 and the inclined hole segment 113 on the sealing ring 3 and the tightness of the fit can reach the best balance point, while avoiding the eccentricity problem and maximizing the sealing effect, and the water leakage rate of the filter element connecting seat can be reduced from more than 5% to 0.5%, which greatly improves the product yield.

[0063] The utility model also provides a filter element assembly, see Figures 1 to 5 The filter element assembly includes a filter element body 6 and a filter element connection seat. The specific structure of the filter element connection seat refers to the above embodiment. Since the filter element assembly adopts all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here. Among them, the connection seat body 1 of the filter element connection seat is detachably connected to the filter element body 6, and the flow passage 11 of the connection seat body 1 is connected to the filter channel (not shown in the figure) of the filter element body 6.

[0064] Optionally, refer to Figures 1 to 5The flow channel 11 passes through the connecting seat body 1 in the up-down direction; when the water stop valve 2 of the filter element connecting seat is in the sealing position, the lower end of the water stop valve 2 extends out from the lower end opening of the flow channel 11; when the connecting seat body 1 is connected to the filter element body 6, the filter element body 6 is used to abut the lower end of the water stop valve 2 to push the water stop valve 2 to move upward to the flow position, so that the water body can flow in the flow channel 11 and the filtration channel.

[0065] In actual application, Figure 2 and Figure 3 As shown, when the connecting seat body 1 is connected to the filter element body 6, the filter element body 6 abuts against the lower end protruding part of the water stop valve 2, so that the water stop valve 2 can be pushed to move upward to the flow position, so that the sealing ring 3 moves upward with the water stop valve 2 to the flow hole section 111. Since there is a circumferential gap between the outer side of the sealing ring 3 and the hole wall of the flow hole section 111, the flow channel 11 is in a conducting state at this time, and the water body can flow normally in the flow channel 11 and enter and exit the filter element body 6 through the flow channel 11, thereby completing the filtering and purification operation of the water body in the filter element body 6; and after the filtering and purification is completed, the connecting seat body 1 is removed from the filter element body 6, as shown in FIG. Figure 4 and Figure 5 As shown, the water stop valve 2 can move downward to the sealing position, so that the sealing ring 3 moves downward with the water stop valve 2 to fit with the straight hole section 112 and the inclined hole section 113 at the same time. Based on the elastic deformation characteristics of the sealing ring 3, a sealing effect can be formed by fitting with the straight hole section 112 and the inclined hole section 113, so that the flow channel 11 is in a blocked state, and water cannot flow in the flow channel 11, thereby preventing residual water from flowing out of the filter element connecting seat.

[0066] In the above sealing state, since the inclined hole section 113 has a horizontal component, as the water stop valve 2 continues to move downward, the fit tightness between the sealing ring 3 and the inclined hole section 113 will continue to increase, thereby ensuring that the sealing ring 3 is tightly attached to the inclined hole section 113 and obtaining a good sealing effect; and the straight hole section 112 can guide the sealing ring 3, and can ensure the concentricity between the sealing ring 3 and the inclined hole section 113 by radially limiting the sealing ring 3, avoiding the eccentricity of the sealing ring 3 relative to the inclined hole section 113 under the action of the external force driving it to move downward, so that the fit state between the sealing ring 3 and the inclined hole section 113 can be stably maintained. In this way, through the joint action of the straight hole section 112 and the inclined hole section 113, the fit tightness of the sealing ring 3 can be ensured while avoiding the eccentricity of the sealing ring 3, thereby improving the sealing quality, effectively avoiding the water seepage problem of the filter element connection seat, and greatly improving the product yield. In addition, the straight hole section 112 is more convenient for digital measurement. Compared with the traditional single inclined surface which is difficult to measure, by performing digital measurement on the straight hole section 112, it is possible to more clearly and accurately determine whether the incoming material is qualified, thereby further ensuring the sealing effect of the subsequent finished product.

[0067] The utility model also proposes a water purification device, which includes a filter element assembly. The specific structure of the filter element assembly refers to the above-mentioned embodiment. Since the water purification device adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be described one by one here.

[0068] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A filter element connection seat, characterized in that: The filter element connecting seat comprises: The connecting seat body is provided with a flow passage, wherein the flow passage comprises a flow hole section, a straight hole section and an inclined hole section which are arranged in sequence from top to bottom, and the diameter of the inclined hole section gradually decreases from top to bottom; A water stop valve, movably fitted in the flow passage; A sealing ring is sleeved on the water stop valve, and the outer diameter of the sealing ring is smaller than the flow hole section and larger than the straight hole section; when the water stop valve moves upward to the flow position, the sealing ring is located in the flow hole section to allow water to flow in the flow channel; when the water stop valve moves downward to the sealing position, the sealing ring is simultaneously fitted with the straight hole section and the inclined hole section to prevent water from flowing in the flow channel.

2. The filter element connection seat according to claim 1, characterized in that: The filter element connecting seat also includes an elastic member, one end of which is connected to the connecting seat body, and the other end of which is connected to the water stop valve; the elastic member is used to apply a downward elastic force to the water stop valve to drive the water stop valve to move to the sealing position.

3. The filter element connection seat according to claim 2, characterized in that: The flow passage passes through the connection seat body in the up-down direction; when the water stop valve is located at the sealing position, the lower end of the water stop valve extends out from the lower end opening of the flow passage.

4. The filter element connection seat according to claim 3, characterized in that: The filter element connecting seat also includes a water sealing cover, which is closed on the connecting seat body and covers the upper end opening of the flow channel; the upper end of the elastic member is connected to the water sealing cover, and the lower end of the elastic member is connected to the water stop valve; a bypass channel is opened on the surface of the connecting seat body, and the bypass channel is connected to the flow hole section.

5. The filter element connection seat according to claim 4, characterized in that: The water sealing cover is fixed on the connecting seat body by ultrasonic welding.

6. The filter element connection seat according to claim 1, characterized in that: The flow passage further comprises a transition hole section, wherein the transition hole section is located between the flow hole section and the straight hole section, and the diameter of the transition hole section gradually decreases from top to bottom.

7. The filter element connection seat according to claim 1, characterized in that: The length of the straight hole segment and the wire diameter of the sealing ring satisfy the following relationship: L>w*2 / 3 Wherein, L is the length of the straight hole segment, and w is the wire diameter of the sealing ring; And / or, the angle between the hole wall of the inclined hole segment and the horizontal plane is 45-47°; And / or, the diameter of the straight hole segment is 90% to 92% of the outer diameter of the sealing ring.

8. A filter element assembly, characterized in that: The filter element assembly includes a filter element body and a filter element connecting seat as described in any one of claims 1 to 7; the connecting seat body of the filter element connecting seat is detachably connected to the filter element body, and the flow channel of the connecting seat body is connected to the filtration channel of the filter element body.

9. The filter element assembly according to claim 8, characterized in that: The flow channel penetrates the connecting seat body in the up-down direction; when the water stop valve of the filter element connecting seat is in the sealing position, the lower end of the water stop valve extends out from the lower end opening of the flow channel; when the connecting seat body is connected to the filter element body, the filter element body is used to abut the lower end of the water stop valve to push the water stop valve to move upward to the flow position, so that water can flow in the flow channel and the filter channel.

10. A water purification device, characterized in that: The water purification device comprises a filter element assembly as described in any one of claims 8 to 9.

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