Non-return type filtering device

Abstract

A non-return type filtering device is suitable for being connected to an upper cover, and the upper cover comprises a cover body, an inflow groove suitable for being connected with a raw water end, a positioning groove and an outflow groove suitable for being connected with a purified water end. The non-return filtering device comprises a filtering unit and a non-return valve connected with the filtering unit. The filter unit comprises a filter element and a filter shell wrapping the outer side of the filter element. The check valve is connected with the filter element and comprises a fixing part and an abutting part. When the abutting part is switched to the opening position, the abutting part deforms in the direction away from the inner peripheral wall of the filter shell. When the abutting part is switched to the closing position, the abutting part is unfolded to abut against the inner side of the filter shell, so that the non-return effect of stopping liquid from flowing out of the filter shell to the external environment is achieved due to the fact that the abutting part can be placed at will when a user disassembles the filter shell.

Description

Technical Field

[0001] The invention relates to a filtering device, in particular to a non-return filtering device. Background Art

[0002] In order to meet the use requirements of general household water purifiers, existing household water purifiers include an upper cover suitable for connecting the raw water end and the purified water end, a filter bottle detachably connected to the upper cover, and a filter element disposed in the filter bottle. By separating the raw water end and the purified water end from the upper cover, separating the upper cover from the filter bottle, and then taking out the filter element disposed in the filter bottle, the clean filter element can be reinstalled in the filter bottle, and the filter element contained in the filter bottle can be simply replaced, so as to achieve the effect of self-replacement of the filter element by general households.

[0003] However, after the user disassembles the filter bottle from the upper cover, the filter bottle may be placed carelessly by the user, and the filter bottle may be in a tilted state. At this time, the water remaining in the filter bottle will flow out of the filter bottle, causing the water to splash onto the ground or the user, causing inconvenience in operation. Summary of the invention

[0004] The object of the present invention is to provide a non-return type filtering device which can prevent water from flowing out of a filter bottle when a filter element is replaced.

[0005] The non-return type filtering device of the present invention comprises a filtering unit and a non-return valve connected to the filtering unit.

[0006] The filter unit is suitable for connecting to the upper cover, and includes a filter element, and a filter shell coated on the outside of the filter element and defining a accommodating space for accommodating the filter element and liquid, wherein the filter element has a joint suitable for connecting to the cover body and communicating with the outflow groove, a filter element defining a filtration space suitable for filtering and purifying the liquid and communicating with the joint, and an annular groove arranged around the joint, the filter shell has a shell body, and a connecting head arranged on the top of the shell body and suitable for extending and fixing in the positioning groove, the connecting head has an inner circumferential wall defining an annular groove around an axis suitable for communicating with the inflow groove and the accommodating space, the annular groove has a lower opening facing the accommodating space, and an upper opening formed at the top of the connecting head and suitable for communicating with the inflow groove.

[0007] The check valve is sleeved on the joint and includes a fixed portion sleeved on the annular groove, and an abutment portion extending from the fixed portion away from the upper cover to abut the inner circumferential wall, wherein the abutment portion can be switched between an open position and a closed position. When the abutment portion is switched to the open position, the abutment portion is deformed in a direction away from the inner circumferential wall by the liquid stamping from the inflow groove into the annular groove, so that the inflow groove, the annular groove and the accommodating space are connected to each other to form an inflow channel; when the abutment portion is switched to the closed position, the abutment portion is expanded to abut against the inner circumferential wall to block the inflow channel, so as to prevent the liquid from flowing out of the upper opening.

[0008] The purpose of the present invention and the solution to its technical problems can be further achieved by adopting the following technical measures.

[0009] Preferably, in the aforementioned non-return filter device, the non-return valve further comprises a plurality of ribs which surround the fixing portion and are spaced apart from each other and are connected to the abutting portion away from the fixing portion.

[0010] Preferably, in the aforementioned non-return filter device, the non-return valve further comprises a groove arranged around a side of the abutting portion adjacent to the fixing portion.

[0011] Preferably, in the aforementioned non-return filter device, the non-return valve further comprises an annular disk which is arranged at one end of the abutting portion away from the fixing portion and abuts against the peripheral edge of the lower opening.

[0012] Preferably, in the aforementioned non-return type filtering device, the abutting portion is made of a flexible material.

[0013] Preferably, in the aforementioned non-return filter device, the filter element further comprises a protrusion extending from the filter element away from the upper cover and axially annularly arranged above the annular groove and spaced apart from the inner circumferential wall.

[0014] The beneficial effect of the present invention is that when the liquid can flow along the inflow groove to the inflow channel, the abutment portion will be pressed away from the inner circumferential wall by the liquid, and the liquid will smoothly flow into the accommodating space and penetrate the filter element to the filtration space. The filter element will filter and purify the liquid and flow from the filtration space along the joint to the outflow groove, and when the liquid does not press the abutment portion, the abutment portion will expand and lean against the inner circumferential wall and block the inflow channel, so as to prevent the liquid from flowing out from the upper opening. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a side view illustrating a first embodiment of the non-return filter device of the present invention;

[0016] Figure 2 is an incomplete cross-sectional view illustrating the connection relationship between the filter unit and the check valve of the first embodiment;

[0017] Figure 3 is similar Figure 2 An incomplete cross-sectional view of Figure 2 It is described that the check valve of the first embodiment is switched to an open position;

[0018] Figure 4 is a partial enlarged view, illustrating that the check valve of the first embodiment is sleeved in the annular groove;

[0019] Figure 5 is a side view illustrating a second embodiment of the non-return filter device of the present invention;

[0020] Figure 6 is a bottom view illustrating a plurality of ribs of the check valve of the second embodiment;

[0021] Figure 7 It is an incomplete cross-sectional view. Figure 5 and Figure 6 Describe the connection relationship between the check valve and the joint of the filter element in the second embodiment;

[0022] Figure 8 is a side view illustrating a third embodiment of the non-return filter device of the present invention;

[0023] Fig. 9 It is an incomplete cross-sectional view. Figure 8 The connection relationship between the check valve and the joint of the filter element in the third embodiment is described. DETAILED DESCRIPTION

[0024] The present invention is described in detail below with reference to the accompanying drawings and embodiments.

[0025] See also Figure 1 , Figure 2 and Figure 3A first embodiment of the non-return filter device of the present invention is suitable for connection to an upper cover 9, wherein the upper cover 9 includes a cover body 91 having an inlet 911 and an outlet 912, an inflow groove 92 connected to the inflow groove 911 and suitable for connection to a raw water end, a positioning groove 93 connected to the inflow groove 92 and arranged downstream of the inflow groove 92 and axially penetrating the cover body 91, and an outflow groove 94 connected to the positioning groove 93 and the outlet 912 and arranged downstream of the positioning groove 93 and suitable for connection to a clean water end. This first embodiment is suitable for filtering and purifying liquid flowing into the inflow groove 92 from the raw water end, converting the liquid into pure clean water for providing a user, and then outputting the clean water from the clean water end. The first embodiment includes a filter unit 1, and a non-return valve 2 connected to the filter unit 1.

[0026] The filter unit 1 includes a filter element 11 and a filter housing 12 covering the outside of the filter element 11 and defining a receiving space 120 suitable for receiving the filter element 11 and the liquid. The material of the filter housing 12 is illustratively selected from polypropylene (PP) or acrylonitrile-styrene copolymer (SAN). Preferably, the filter housing 12 is transparent so that the user can observe the current status of the filter element 11.

[0027] See also Figure 4 And with Figure 1 and Figure 2 The filter element 11 has a joint 111 suitable for connecting to the cover body 91 and communicating with the outflow groove 94, a filter element 112 defining a filter space 110 suitable for filtering and purifying the liquid and communicating with the joint 111, an annular groove 113 arranged around the joint 111 and for the non-return valve 2 to be fixedly mounted, and a protrusion 114 extending from the filter element 11 away from the upper cover 9 and arranged axially above the annular groove 113 and spaced apart from the filter housing 12. In the first embodiment, the joint 111 and the outflow groove 94 are tightly connected to each other to prevent the liquid from leaking when flowing through the connection between the joint 111 and the outflow groove 94. The filter element 112 is illustratively selected from activated carbon rods, origami filter elements, ceramic filter elements, copper-zinc alloy filter elements (KDF filter elements), ion exchange resin filter elements, PP cotton filter elements, polypropylene membrane filter elements, hollow fiber membrane filter elements, ultrafiltration membrane filter elements or RO reverse osmosis membrane filter elements and other water-permeable filter materials. The annular groove 113 is arranged on the side of the joint 111 adjacent to the upper cover 9, and the annular groove 113 and the upper cover 9 are spaced apart from each other for the protrusion 114 to be arranged, and the protrusion 114 is matched with the protrusion 114. Figure 4 As shown in the structural design extending obliquely downward in the axial direction, the protrusion 114 allows the user to conveniently sleeve the check valve 2 into the annular groove 113 to achieve a quick installation effect.

[0028] The filter housing 12 has a housing body 121, and a connecting head 122 disposed on the top of the housing body 121 and adapted to be inserted and fixed in the positioning groove 93. The connecting head 122 has an inner peripheral wall 122b surrounding the axis Y for the connector 111 of the filter element 11 to be inserted axially, and defines an annular groove 122a adapted to connect the inflow groove 92 and the accommodating space 120. In this embodiment, the inner peripheral wall 122b and the outer side of the connector 111 of the filter element 11 are spaced apart from each other, and the inner peripheral wall 122b and the protrusion 114 are spaced apart from each other.

[0029] The annular groove 122a has a lower opening 122a1 facing the accommodating space 120, and an upper opening 122a2 formed at the top of the connecting head 122 and adapted to be connected to the inflow groove 92. Part of the joint 111 extends through the upper opening 122a2 and is connected to the outflow groove 94, and the upper opening 122a2 is adapted to be connected to the groove edge of the inflow groove 92, so that the liquid at the raw water end can flow into the annular groove 122a along the outer side of the joint 111, and flow into the accommodating space 120 from the lower opening 122a1.

[0030] The check valve 2 includes a fixing portion 21 sleeved in the annular groove 113, and an abutting portion 22 extending from the fixing portion 21 away from the upper cover 9 to abut against the inner peripheral wall 122b. The fixing portion 21 and the annular groove 113 are tightly sleeved with each other and are used to prevent the fixing portion 21 from sliding along the axial direction. Preferably, the abutting portion 22 is composed of a flexible material, and the flexible material is illustratively selected from materials with high impact strength and good flexibility such as polyethylene (PE), polypropylene (PP), ethylene-vinyl acetate copolymer (EVA), (meth)acrylate (co)polymer (PMMA), or carbon fiber reinforced polymer (CFRP).

[0031] Before using this first embodiment, the upper cover 9 and the connecting head 122 of the filter housing 12 are tightly connected to each other, so that the joint 111 that partially passes through the upper open port 122a2 is connected to the outflow groove 94 of the upper cover 9. At this time, the annular groove 122a will connect the inflow groove 92 with the raw water end, and the joint 111 of the filter element 11 will connect the outflow groove 94 with the clean water end.

[0032] See also Figure 3 And with Figure 1 and Figure 2When the first embodiment is used, the user operates the raw water end to make the liquid flow into the annular groove 122a along the inflow groove 92. Based on the flow force of the liquid and the flexibility of the flexible material, the abutment portion 22 will be driven by the liquid and switch between the open position and the closed position. When the liquid presses the abutment portion 22, the abutment portion 22 will bend and deform in a direction away from the inner peripheral wall 122b and switch to the open position. At this time, the inflow groove 92, the annular groove 122a and the accommodating space 120 will be connected to each other. Figure 3 As shown, an inflow channel is formed so that the liquid can flow into the accommodating space 120 along the inflow channel. Based on the water permeability of the filter element 112, when the liquid penetrates the filter element 112 and flows into the filter space 110, the liquid is filtered and purified into clean water, and when the filter element 112 continuously converts the liquid into the clean water, the clean water gradually fills the filter space 110 and overflows from the joint 111 and flows to the outflow groove 94 and the clean water end.

[0033] When the filter element 112 reaches adsorption saturation due to continuous filtration of the liquid and loses its filtering effect, the user separates the upper cover 9 from the filter housing 12 by using an auxiliary tool such as a wrench or a filter bottle handle, and then based on the flexible property of the flexible material of the abutting portion 22, the abutting portion 22 is made to be as flexible as possible. Figure 2 As shown, it automatically expands to abut against the inner wall 122b and switches to the closed position, and the abutment portion 22 will block the inflow channel, so that a small amount of liquid remaining in the accommodating space 120 of the filter housing 12 cannot flow out from the upper open port 122a2 along the inflow channel, so as to achieve a backstop effect to prevent the liquid from seeping out in response to the user placing the filter unit 1 at will.

[0034] See also Figure 5 , Figure 6 and Figure 7 , is a second embodiment of the non-return filter device of the present invention. The structure of the second embodiment is substantially the same as that of the first embodiment, but the difference is that the non-return valve 2 of the second embodiment further includes four ribs 23 which surround the fixing portion 21 at equal intervals and are away from the fixing portion 21 and connected to the abutting portion 22, and a groove 24 which is arranged around the abutting portion 22 on one side adjacent to the fixing portion 21. The groove 24 is as follows Figure 5 As shown, the ribs 23 are formed on the upper surface of the abutment portion 22. Figure 6 As shown in FIG. 2 , the groove 24 is in the shape of a long strip and is supported below the abutment portion 22. Specifically, the groove 24 is as follows Figure 5As shown, the contact portion 22 is divided into a maintaining section 221 on one side adjacent to the fixing portion 21 and a bending section 222 on one side away from the fixing portion 21 .

[0035] Through the structural design of the groove 24 of the check valve 2, the physical structure of the connection between the bending section 222 and the maintaining section 221 is relatively thin, and the bending section 222 can be easily bent toward the maintaining section 221 due to the liquid stamping, which can improve the smoothness of the liquid flowing into the accommodating space 120. In addition, the ribs 23 can strengthen the overall structural strength of the abutting portion 22, so that after the bending section 222 is bent due to stamping, it can also be supported by the ribs 23 to maintain the structural morphology of its own foundation, so that the abutting portion 22 can be switched back to the closed position again due to the flexibility of the flexible material, and the abutting portion 22 will again lean against the inner peripheral wall 122b to block the inflow channel, so as to prevent the liquid from flowing out of the upper open port 122a2.

[0036] See also Figure 8 and Fig. 9 , is a third embodiment of the non-return filter device of the present invention. The structure of the third embodiment is substantially the same as that of the first embodiment, but the difference is that the non-return valve 2 of the third embodiment further includes an annular disk 25 disposed at one end of the abutting portion 22 away from the fixing portion 21 and used to abut against the periphery of the lower opening 122a1. Preferably, the annular disk 25 and the abutting portion 22 are integrally formed and are composed of the flexible material.

[0037] Through the structural design of the annular disk 25, when the abutting portion 22 abuts against the inner peripheral wall 122b, the annular disk 25 can be Fig. 9 As shown, the abutting portion 22 abuts against the periphery of the lower opening 122a1 and helps to prevent most of the liquid remaining in the accommodating space 120 from flowing back from the lower opening 122a1 into the annular groove 122a. The abutting portion 22 can effectively block the remaining small amount of the liquid, and is used to further optimize the backflow prevention effect in response to the situation where too much liquid remains in the filter housing 12.

[0038] In summary, in the non-return filter device of the present invention, the non-return valve 2 uses the flexibility of the flexible material to enable the abutment portion 22 to switch between the open position and the closed position, and when the abutment portion 22 is pressed by the liquid, the abutment portion 22 will deform away from the inner circumferential wall 122b, so that the inflow groove 92, the annular groove 122a and the accommodating space 120 are connected to each other, allowing the liquid to flow smoothly into the accommodating space 120, and when the liquid does not press the abutment portion 22, the abutment portion 22 will expand and abut against the inner circumferential wall 122b to block the inflow channel, so as to prevent the liquid from flowing along the upper open port 122a2 to the external environment, so the purpose of the present invention can be achieved.

Claims

1. A non-return filter device, suitable for connection to an upper cover, the upper cover comprising a cover body having an inlet and an outlet, an inflow groove connected to the inflow groove and suitable for connecting to a raw water end, a positioning groove connected to the inflow groove and arranged downstream of the inflow groove, and an outflow groove connected to the positioning groove and the outlet and arranged downstream of the positioning groove and suitable for connecting to a clean water end; characterized in that: The non-return type filtering device comprises A filter unit, suitable for connecting the upper cover, and comprising a filter element, and a filter housing coated on the outside of the filter element and defining a accommodating space suitable for accommodating the filter element and liquid, wherein the filter element has a joint suitable for connecting the cover body and communicating with the outflow groove, a filter element defining a filtration space suitable for filtering and purifying the liquid and communicating with the joint, and an annular groove arranged around the joint, the filter housing has a shell body, and a connecting head arranged on the top of the shell body and suitable for extending and fixing in the positioning groove, the connecting head has an inner peripheral wall defining an annular groove around an axis suitable for communicating the inflow groove with the accommodating space, the annular groove has a lower opening facing the accommodating space, and an upper opening formed at the top of the connecting head and suitable for communicating with the inflow groove; and A check valve is sleeved on the joint, and the check valve includes a fixed portion sleeved on the annular groove, and an abutting portion extending from the fixed portion away from the upper cover to abut the inner circumferential wall, wherein the abutting portion can be switched between an open position and a closed position. When the abutting portion is switched to the open position, the abutting portion is deformed in a direction away from the inner circumferential wall by the liquid stamping from the inflow groove into the annular groove, so that the inflow groove, the annular groove and the accommodating space are connected to each other to form an inflow channel; when the abutting portion is switched to the closed position, the abutting portion is expanded and abutted against the inner circumferential wall to block the inflow channel, so as to prevent the liquid from flowing out of the upper opening.

2. The non-return filter device according to claim 1, characterized in that: The check valve further includes a plurality of ribs which are spaced apart from each other and surround the fixing portion and are separated from the fixing portion and connected to the abutting portion.

3. The non-return filter device according to claim 1, characterized in that: The check valve further includes a groove arranged around a side of the abutting portion adjacent to the fixing portion.

4. The non-return filter device according to claim 2, characterized in that: The check valve further includes a groove arranged around a side of the abutting portion adjacent to the fixing portion.

5. The non-return filter device according to any one of claims 1 to 4, characterized in that: The check valve further comprises an annular disk which is arranged at one end of the abutting portion away from the fixing portion and abuts against the peripheral edge of the lower opening.

6. The non-return filter device according to any one of claims 1 to 4, characterized in that: The abutting portion is made of flexible material.

7. The non-return filter device according to claim 5, characterized in that: The abutting portion is made of flexible material.

8. The non-return filter device according to claim 1, characterized in that: The filter element further includes a protrusion extending from the filter element away from the upper cover and axially annularly arranged above the annular groove and spaced apart from the inner peripheral wall.

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