Bidirectional check valve and its flow control method and manufacturing method

Abstract

The present application discloses a bidirectional check valve, a flow control method and a manufacturing method thereof. The bidirectional check valve comprises a valve body unit and a sealing unit. The valve body unit has a first chamber, a second chamber, a flow control channel, a first flow passage and a second flow passage. The first flow passage is connected to the first chamber, the second flow passage is connected to the second chamber, and the flow control channel extends upward and downward and is connected to the first chamber and the second chamber. The sealing unit comprises a connecting rod, a sealing part and a deformable suspension part. The connecting rod extends from the first chamber to the second chamber through the flow control channel. The sealing part is arranged at the bottom end of the connecting rod. The suspension inner side and the suspension outer side of the suspension part are connected to the top end of the connecting rod and the valve body unit respectively in a manner that the suspension part closes the upper opening of the first chamber, so that the sealing part is suspended by the suspension part through the connecting rod.

Description

TECHNICAL FIELD

[0001] The present application relates to a check valve, in particular to a bidirectional check valve and a flow control method and a manufacturing method thereof. BACKGROUND

[0002] The check valve is widely used in drinking water equipment such as water purifiers and water dispensers. It is arranged between the water tank and the water pump. When the water pump starts pumping, based on the principle of negative pressure, the check valve automatically connects the water tank and the water pump to allow the water stored in the water tank to enter the water pump through the check valve and be pumped out. When the water pump stops working, the check valve automatically blocks the water tank and the water pump to prevent the water stored in the water tank from entering the check valve. For example, the Chinese utility model patent with publication number CN217030142U discloses a negative pressure valve. In the technical solution disclosed in the patent, when the water outlet is affected by the water pump, the upper air chamber generates negative pressure, and the lower air chamber is atmospheric pressure. Therefore, the extension part of the air pressure diaphragm moves upward, the extension part drives the top rod to move upward, the top rod abuts against the valve plug and can push the valve plug upward to open the valve port, and at this time the communication between the water inlet and the water outlet can realize water outlet. When the water pump stops working, the extension part of the air pressure diaphragm moves downward to reset, and at this time the top rod moves downward with the extension part, and the valve plug is blocked under the driving of the spring. As can be seen, the negative pressure valve of the above-mentioned patent relies on the spring to abut against the valve plug to block the valve port. This way results in poor sealing of the negative pressure valve. Specifically, when the water pressure of the water outlet is large, the water of the water outlet will drive the valve plug to move upward to form a gap between the valve plug and the shell, so that the water of the water outlet flows back to the water inlet through the gap formed between the valve plug and the shell, thereby causing the water in the water tank to be contaminated. SUMMARY

[0003] One object of the present application is to provide a bidirectional check valve and a flow control method and a manufacturing method thereof, wherein the bidirectional check valve can prevent fluid from flowing back.

[0004] One object of the present application is to provide a bidirectional check valve and a flow control method and a manufacturing method thereof, wherein the bidirectional check valve provides a valve body unit and a sealing unit, the greater the pressure of the second chamber of the valve body unit, the better the sealing effect of the sealing part of the sealing unit can be improved, so that the bidirectional check valve has the ability to prevent fluid from flowing back from the second chamber to the first chamber of the valve body unit.

[0005] One object of the present application is to provide a bidirectional check valve, a method for controlling the flow thereof, and a method for manufacturing the same, wherein the sealing unit provides a connecting rod, a sealing portion, and a suspending portion, the suspending portion is deformedly arranged in the first chamber of the valve body unit, and the suspending portion suspends the sealing portion in the first chamber or the flow control passage of the valve body unit through the connecting rod, when the pressure of the second chamber of the valve body unit is greater than the pressure of the first chamber, the fluid in the second chamber applies pressure to the sealing portion, so that the sealing portion closely adheres to the valve body unit to prevent the second chamber and the first chamber from being connected. It can be understood that the greater the pressure difference between the second chamber and the first chamber of the valve body unit, the greater the pressure applied by the fluid in the second chamber to the sealing portion, and accordingly, the sealing portion can more closely adhere to the valve body unit, so that the bidirectional check valve can have the effect of preventing fluid backflow.

[0006] According to one aspect of the present application, the present application provides a bidirectional check valve, comprising:

[0007] a valve body unit, wherein the valve body unit has a first chamber, a second chamber, a flow control passage, a first flow passage, and a second flow passage, the first chamber and the second chamber are arranged above and below and connected through the flow control passage, the first flow passage is connected to the first chamber, and the second flow passage is connected to the second chamber; and

[0008] a sealing unit, wherein the sealing unit comprises a connecting rod, a sealing portion, and a deformable suspending portion, the connecting rod extends from the first chamber of the valve body unit to the second chamber through the flow control passage, the sealing portion is arranged at the bottom end of the connecting rod, and the suspending portion has a suspending inner side and a suspending outer side connected to the top end of the connecting rod and the valve body unit, respectively, in a manner that the suspending portion closes the upper opening of the first chamber of the valve body unit, so that the suspending portion suspends the sealing portion through the connecting rod, wherein when the pressure of the first chamber of the valve body unit is less than or equal to the pressure of the second chamber and the first chamber is positive, the suspending portion suspends the sealing portion through the connecting rod at a position that closes the flow control passage of the valve body unit, and when the pressure of the first chamber of the valve body unit is greater than the pressure of the second chamber and the second chamber is negative, the suspending portion suspends the sealing portion through the connecting rod at a position that opens the flow control passage of the valve body unit.

[0009] According to one embodiment of the present application, the top surface of the sealing portion is arranged to be able to adhere to or move away from the bottom surface of the valve body unit for forming the flow control passage, so as to allow the sealing portion to close or open the flow control passage of the valve body unit.

[0010] According to one embodiment of the present application, the outer wall of the sealing portion is arranged to be able to abut or move away from the inner wall of the valve body unit for forming the flow control passage, so as to allow the sealing portion to close or open the flow control passage of the valve body unit.

[0011] According to one embodiment of the present application, the connecting rod extends from the first chamber of the valve body unit to the second chamber through the flow control passage.

[0012] According to one embodiment of the present application, the sealing portion is mounted at the bottom end of the connecting rod; or, the sealing portion is integrally formed at the bottom end of the connecting rod; or, the sealing portion and the connecting rod are an integral structure.

[0013] According to one embodiment of the present application, the suspending portion is mounted at the top end of the connecting rod; or, the suspending portion is integrally formed at the top end of the connecting rod; or, the suspending portion and the connecting rod are an integral structure.

[0014] According to one embodiment of the present application, the suspending portion further comprises a ring-shaped suspending element and a ring-shaped suspending edge element integrally extending outwardly from the suspending element, the inner side of the suspending element forms the suspending inner side of the suspending portion, the outer side of the suspending edge element forms the suspending outer side of the suspending portion, and the longitudinal section of the suspending edge element forms an arch shape.

[0015] According to one embodiment of the present application, the valve body unit further comprises a valve seat and a bottom cover, wherein the first chamber, the flow control passage, the first flow passage and the second flow passage are formed in the valve seat, the bottom cover is mounted at the bottom of the valve seat to form the second flow passage between the bottom cover and the valve seat, and the suspending outer side of the suspending portion is connected to the top of the valve seat to close the upper opening of the first chamber of the valve body unit by the suspending portion.

[0016] According to one embodiment of the present application, the valve body unit further comprises a top cover, the top cover is mounted at the top of the valve seat in a manner that the top cover and the valve seat clamp the suspending outer side of the suspending portion.

[0017] According to one embodiment of the present application, the bidirectional check valve has a clearance space, the clearance space is formed between the top cover and the suspending portion, and the top cover has at least one gas passage, the gas passage communicates with the clearance space.

[0018] According to one embodiment of the present application, the bidirectional check valve further comprises a reset element, the reset element is located in the first chamber of the valve body unit, and the top end of the reset element abuts against the suspension part, and the bottom end of the reset element abuts against the valve body unit.

[0019] According to another aspect of the present application, the present application further provides a flow control method of a bidirectional check valve, wherein the flow control method comprises the following steps:

[0020] (a) when the pressure in a second chamber of a valve body unit decreases and the second chamber is under negative pressure, a sealing part of a sealing unit is moved in a direction towards the second chamber of the valve body unit, and in the process, a suspension part is deformed downward by a connecting rod to accumulate elastic potential energy, so as to allow the sealing part to open a flow control passage of the valve body unit for connecting a first chamber and the second chamber, thereby allowing fluid to flow from the first chamber of the valve body unit to the second chamber through the flow control passage; and

[0021] (b) when the pressure in the second chamber of the valve body unit increases and the first chamber is under positive pressure, the suspension part is moved in a direction towards the first chamber by the connecting rod in the process of returning to the original state, so as to allow the sealing part to close the flow control passage of the valve body unit, thereby preventing fluid from flowing from the first chamber of the valve body unit to the second chamber through the flow control passage, and preventing fluid from flowing from the second chamber of the valve body unit to the first chamber through the flow control passage.

[0022] According to one embodiment of the present application, in the step (a), the suspension part is allowed to press a reset element in a direction towards the second chamber of the valve body unit, so that the reset element is deformed to accumulate elastic potential energy, and in the step (b), the reset element is allowed to push the suspension part in a direction away from the second chamber of the valve body unit in the process of returning to the original state.

[0023] According to another aspect of the present application, the present application further provides a manufacturing method of a bidirectional check valve, wherein the manufacturing method comprises the following steps:

[0024] (A) connecting a suspension part on the top of a valve seat, so as to allow the suspension part to suspend a sealing part on the bottom of the valve seat by a connecting rod movably held in a flow control passage of the valve seat, wherein a first chamber is formed between the valve seat and the suspension part, and the first chamber is connected to the first flow passage of the valve seat; and

[0025] (B) installing a bottom cover on the bottom of the valve seat, wherein a second chamber is formed between the bottom cover and the valve seat, and the second chamber is connected to a second flow passage of the valve seat.

[0026] According to an embodiment of the present application, the step (A) further comprises:

[0027] (A.1) allowing the bottom end of the connecting rod to extend from the top to the bottom of the valve seat through the flow control passage of the valve seat;

[0028] (A.2) connecting the holding outer side of the holding portion to the top of the valve seat; and

[0029] (A.3) installing the sealing portion on the bottom end of the connecting rod.

[0030] According to an embodiment of the present application, the step (A) further comprises:

[0031] (A.1') allowing the top end of the connecting rod to extend from the bottom to the top of the valve seat through the flow control passage of the valve seat;

[0032] (A.2') installing the holding inner side of the holding portion on the top end of the connecting rod; and

[0033] (A.3') connecting the holding outer side of the holding portion to the top of the valve seat.

[0034] According to an embodiment of the present application, in the step (A.2), the holding portion is installed on the top end of the connecting rod; or, the holding portion is integrally formed on the top end of the connecting rod; or, the holding portion and the connecting rod are an integral structure.

[0035] According to an embodiment of the present application, in the above method, the sealing portion is installed on the bottom end of the connecting rod; or, the sealing portion is integrally formed on the bottom end of the connecting rod; or, the sealing portion and the connecting rod are an integral structure.

[0036] According to an embodiment of the present application, before the step (A.1), the step (A) further comprises the step of: sleeving a reset element on the connecting rod, so as to allow the top end and the bottom end of the reset element to abut against the holding portion and the valve seat, respectively, after the step (A.2).

[0037] According to an embodiment of the present application, before the step (A.2'), the step (A) further comprises the step of: sleeving a reset element on the connecting rod, so as to allow the top end and the bottom end of the reset element to abut against the holding portion and the valve seat, respectively, after the step (A.2').

[0038] According to one embodiment of the present application, after the step (A), the manufacturing method further comprises the step of: installing a top cover on the top of the valve seat to clamp the suspension outer side of the suspension part by the top cover and the valve seat. BRIEF DESCRIPTION OF DRAWINGS

[0039] Figure 1 is a perspective view of a two-way check valve according to a preferred embodiment of the present application.

[0040] Figure 2A is an exploded view of the two-way check valve according to the preferred embodiment of the present application from one perspective.

[0041] Figure 2B is an exploded view of the two-way check valve according to the preferred embodiment of the present application from another perspective.

[0042] Figure 3 is a sectional view of the two-way check valve according to the preferred embodiment of the present application.

[0043] Figure 4A is a sectional view of the two-way check valve according to the preferred embodiment of the present application in a first use state.

[0044] Figure 4B is a sectional view of the two-way check valve according to the preferred embodiment of the present application in a second use state.

[0045] Figure 4C is a sectional view of the two-way check valve according to the preferred embodiment of the present application in a third use state.

[0046] Figure 5A is a sectional view of a two-way check valve according to another preferred embodiment of the present application in a first state.

[0047] Figure 5B is a sectional view of the two-way check valve according to the preferred embodiment of the present application in a second state.

[0048] Figure 6A is a sectional view of a two-way check valve according to another preferred embodiment of the present application in a first state.

[0049] Figure 6B is a sectional view of the two-way check valve according to the preferred embodiment of the present application in a second state. DETAILED DESCRIPTION

[0050] Before any embodiments of the application are explained in detail, it is to be understood that the application is not limited in its application to the details of construction and the arrangement of components set forth in the following description or illustrated in the following drawings. The application is capable of other embodiments and of being practiced or being carried out in various ways. Also, it is to be understood that the phraseology and terminology used herein is for the purpose of description and should not be regarded as limiting. The use of "including," "comprising" or "having" and variations thereof herein is meant to encompass the items listed thereafter and equivalents thereof as well as additional items. Unless specified or limited otherwise, the terms "mounted," "connected," "supported," and "coupled" and variations thereof are used broadly and encompass both direct and indirect mountings, connections, supports, and couplings. Further, "connected" and "coupled" are not restricted to physical or mechanical connections or couplings.

[0051] Also, in the disclosure of the present application, the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore the above terms cannot be understood as limiting the present application; secondly, the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of one element can be one, and in another embodiment, the number of the element can be multiple, and the term "one" cannot be understood as limiting the number.

[0052] Reference will now be made to the drawings accompanying the present application Figures 1 to 4C A two-way check valve according to a preferred embodiment of the present application will be disclosed and described in the following description, wherein the two-way check valve comprises a valve body unit 10 and a sealing unit 20.

[0053] Specifically, the valve body unit 10 has a first chamber 101, a second chamber 102, a flow control passage 103, a first flow passage 104, and a second flow passage 105, so as to Figure 3 As shown in the reference view angle, the first chamber 101 and the second chamber 102 are arranged vertically and are in communication through the flow control passage 103, the first flow passage 104 is communicated with the first chamber 101, and the second flow passage 105 is communicated with the second chamber 102.

[0054] The sealing unit 20 comprises a connecting rod 21, a sealing portion 22, and a deformable suspending portion 23. The connecting rod 21 has a rod top end 211 and a rod bottom end 212 corresponding to the rod top end 211, wherein the rod top end 211 of the connecting rod 21 is located in the first chamber 101 of the valve body unit 10, and the rod bottom end 212 of the connecting rod 21 extends to the second chamber 102 through the flow control passage 103 of the valve body unit 10. The sealing portion 22 is arranged at the rod bottom end 212 of the connecting rod 21. The suspending portion 23 has a suspending inner side 231 and a suspending outer side 232 corresponding to the suspending inner side 231, wherein the suspending inner side 231 and the suspending outer side 232 of the suspending portion 23 are connected to the rod top end 211 of the connecting rod 21 and the valve body unit 10 respectively in a manner that the suspending portion 23 closes the upper opening of the first chamber 101 of the valve body unit 10, so that the sealing portion 22 is suspended by the connecting rod 21 through the suspending portion 23.

[0055] Now turning to the drawings Figure 3 In this specific example of the bidirectional check valve of the present application, the rod bottom end 212 of the connecting rod 21 extends to the second chamber 102 through the flow control passage 103 of the valve body unit 10, so that the rod top end 211 of the connecting rod 21 is located in the first chamber 101 of the valve body unit 10, and the rod bottom end 212 of the connecting rod 21 is located in the second chamber 102 of the valve body unit 10, and thus the sealing portion 22 is suspended by the connecting rod 21 through the suspending portion 23 in the second chamber 102 of the valve body unit 10.

[0056] Reference is made to the drawings Figures 4A to 4CWhen the pressure of the first chamber 101 of the valve body unit 10 is greater than the pressure of the second chamber 102 and the second chamber 102 is under negative pressure, the suspension part 23 suspends the sealing part 22 at a position to open the flow control passage 103 of the valve body unit 10 by the connecting rod 21, to allow the first chamber 101 and the second chamber 102 of the valve body unit 10 to communicate, and at this time, the fluid of the first chamber 101 of the valve body unit 10 is allowed to flow to the second chamber 102 through the flow control passage 103. When the pressure of the first chamber 101 of the valve body unit 10 is less than or equal to the pressure of the second chamber 102 and the first chamber 101 is under positive pressure, the suspension part 23 suspends the sealing part 22 at a position to close the flow control passage 103 of the valve body unit 10 by the connecting rod 21, to prevent the first chamber 101 and the second chamber 102 of the valve body unit 10 from communicating, and at this time, the fluid of the first chamber 101 of the valve body unit 10 is prevented from flowing to the second chamber 102 through the flow control passage 103.

[0057] When the pressure of the second chamber 102 of the valve body unit 10 is greater than the pressure of the first chamber 101 and the first chamber 101 is under positive pressure, the fluid in the second chamber 102 of the valve body unit 10 exerts pressure to the sealing part 22 through the connecting rod 21 of the suspension part 23 located in the first chamber 101 of the valve body unit 10, to make the sealing part 22 tightly adhere to the valve body unit 10 to close the flow control passage 103, thereby preventing the second chamber 102 and the first chamber 101 of the valve body unit 10 from communicating, and at this time, the fluid of the first chamber 101 of the valve body unit 10 is prevented from flowing to the second chamber 102 through the flow control passage 103. In other words, when the sealing part 22 is suspended at a position to close the flow control passage 103 of the valve body unit 10, the bidirectional check valve can prevent fluid from flowing backward.

[0058] It is emphasized that the two-way check valve of the present application is designed in such a way that the sealing portion 22 is suspended by the suspension portion 23 of the first chamber 101 of the valve body unit 10 via the connecting rod 21 at a position that closes the flow control passage 103 of the valve body unit 10, so that the greater the pressure difference between the second chamber 102 and the first chamber 101 of the valve body unit 10, the greater the pressure exerted by the fluid in the second chamber 102 of the valve body unit 10 on the sealing portion 22, and accordingly, the more closely the sealing portion 22 can be fitted to the valve body unit 10, so that the effect of the two-way check valve in preventing the backflow of fluid is more significant.

[0059] Now turning to the drawings Figures 4A to 4C In a typical application example of the two-way check valve of the present application in a drinking water system, the first flow passage 104 of the valve body unit 10 is connected to a water tank 100, so that the first flow passage 104 of the valve body unit 10 forms an inlet flow passage, and the second flow passage 105 of the valve body unit 10 is connected to a water pump 200, so that the second flow passage 105 of the valve body unit 10 forms an outlet flow passage.

[0060] When the water pump 200 starts to work, the water pump 200 draws away the water in the second flow passage 105 and the second chamber 102 of the valve body unit 10 to form a negative pressure in the second flow passage 105 and the second chamber 102, so as to allow the pressure in the first chamber 101 of the valve body unit 10 to be greater than that in the second chamber 102, at which time the sealing portion 22 moves downward to open the flow control passage 103 of the valve body unit 10 to allow the first chamber 101 and the second chamber 102 to be connected, and the water stored in the water tank 100 is allowed to be discharged from the drinking water system in sequence through the first flow passage 104, the first chamber 101, the flow control passage 103, the second chamber 102 and the second flow passage 105 of the valve body unit 10, and the water pump 200. In the process of the downward movement of the sealing portion 22, the sealing portion 22 pulls the suspension inner side 231 of the suspension portion 23 downward via the connecting rod 21, so that the suspension portion 23 is deformed to accumulate elastic potential energy.

[0061] When the water pump 200 is stopped, the water drawn into the second flow passage 105 and the second chamber 102 of the valve body unit 10 by the water pump 200 makes the pressure of the second chamber 102 greater than or equal to the pressure of the first chamber 101, and at this time, the sealing part 22 is pulled upward by the suspension part 23 through the connecting rod 21 in the process of returning to the initial state, so that the sealing part 22 is suspended by the suspension part 23 at a position closing the flow control passage 103 of the valve body unit 10, and the water in the second chamber 102 of the valve body unit 10 applies pressure to the sealing part 22, so that the sealing part 22 is tightly attached to the valve body unit 10 to close the flow control passage 103, thereby preventing the second chamber 102 of the valve body unit 10 from being connected to the first chamber 101, so as to prevent the water from flowing back from the second chamber 102 of the valve body unit 10 to the first chamber 101

[0062] In this specific example of the bidirectional check valve of the present application, reference is made to the accompanying drawings, in which Figure 3 When the sealing part 22 is suspended by the suspension part 23 at a position closing the flow control passage 103 of the valve body unit 10 through the connecting rod 21, the top surface 221 of the sealing part 22 is attached to the bottom surface 106 of the valve body unit 10 for forming the flow control passage 103, so as to allow the sealing part 22 to close the flow control passage 103 of the valve body unit 10.

[0063] In other words, the top surface 221 of the sealing part 22 is arranged to be attached to or detached from the bottom surface 106 of the valve body unit 10, wherein when the top surface 221 of the sealing part 22 is arranged to be attached to the bottom surface 106 of the valve body unit 10, the sealing part 22 is suspended at a position closing the flow control passage 103 of the valve body unit 10, so as to prevent the first chamber 101 and the second chamber 102 of the valve body unit 10 from being connected, and correspondingly, when the top surface 221 of the sealing part 22 is arranged to be detached from the bottom surface 106 of the valve body unit 10, the sealing part 22 is suspended at a position opening the flow control passage 103 of the valve body unit 10, so as to allow the first chamber 101 and the second chamber 102 of the valve body unit 10 to be connected.

[0064] Optionally, in the accompanying drawings Figure 5A and Figure 5BIn another preferred example of the bidirectional check valve of the present application, the suspension part 23 suspends the sealing part 22 from the flow control passage 103 of the valve body unit 10 through the connecting rod 21, so that the outer wall 222 of the sealing part 22 is arranged to be able to abut or move away from the inner wall 107 of the valve body unit 10 for forming the flow control passage 103, wherein when the outer wall 222 of the sealing part 22 is arranged to abut the inner wall 107 of the valve body unit 10, the sealing part 22 is suspended at a position to close the flow control passage 103 of the valve body unit 10, so as to prevent the first chamber 101 and the second chamber 102 of the valve body unit 10 from being connected in communication, and correspondingly, when the outer wall 222 of the sealing part 22 is arranged to move away from the inner wall 107 of the valve body unit 10, the sealing part 22 is suspended at a position to open the flow control passage 103 of the valve body unit 10, so as to allow the first chamber 101 and the second chamber 102 of the valve body unit 10 to be connected in communication.

[0065] In addition, in the accompanying drawings Figures 1 to 4C In this specific example of the bidirectional check valve, the sealing part 22 and the connecting rod 21 can be made of different materials, for example, the sealing part 22 and the connecting rod 21 can be manufactured separately, and then the sealing part 22 can be installed at the rod body bottom end 212 of the connecting rod 21, or the sealing part 22 can be integrally formed at the rod body bottom end 212 of the connecting rod 21 through an embedding injection process after the connecting rod 21 is manufactured. In the accompanying drawings Figure 6A And Figure 6B In another preferred example of the bidirectional check valve, the sealing part 22 and the connecting rod 21 can be integrally formed by the same material.

[0066] Continuing to refer to the accompanying drawings 2 to Figure 4C The suspension part 23 further comprises a ring-shaped suspension element 233 and a ring-shaped suspension edge element 234 integrally extending outward from the suspension element 233, the inner side of the suspension element 233 forms the suspension inner side 231 of the suspension part 23, which is connected to the rod body top end 211 of the connecting rod 21, and the outer side of the suspension edge element 234 forms the suspension outer side 232 of the suspension part 23, which is connected to the valve body unit 10, wherein the longitudinal section of the suspension edge element 234 forms an arch shape, so as to increase the restoring force of the suspension part 23 while reducing the height dimension of the suspension part 23, which is crucial for reducing the size of the bidirectional check valve in the height direction while ensuring the anti-backflow effect of the bidirectional check valve.

[0067] Continuing to refer to the accompanying Figures 1 to 4CThe valve body unit 10 further comprises a valve seat 11 and a bottom cover 12, wherein the first chamber 101, the flow control passage 103, the first flow passage 104 and the second flow passage 105 are formed in the valve seat 11, and the bottom cover 12 is installed at the bottom of the valve seat 11 to form the second chamber 102 between the valve seat 11 and the bottom cover 12, and the second chamber 102 is communicated with the first chamber 101 through the flow control passage 103. The suspension outer side 232 of the suspension part 23 is connected to the top of the valve seat 11 to close the upper opening of the first chamber 101 of the valve body unit 10 by the suspension part 23.

[0068] It is worth mentioning that the way of connecting the suspension outer side 232 of the suspension part 23 to the top of the valve seat 11 in the bidirectional check valve of the present application is not limited as long as it can reliably connect the two. For example, in the specific example of the bidirectional check valve of the present application shown in the accompanying drawings, the valve body unit 10 further comprises a top cover 13, which is installed on the top of the valve seat 11 in a way that the top cover 13 and the valve seat 11 sandwich the suspension outer side 232 of the suspension part 23. Figures 1 to 4C

[0069] As a preferred example, the top cover 13, the valve seat 11 and the bottom cover 12 of the valve body unit 10 can each be provided with a set of perforations, wherein a nut is installed after a screw passes through the perforations of the top cover 13, the perforations of the valve seat 11 and the perforations of the bottom cover 12 in sequence at one end of the screw, so that the top cover 13, the valve seat 11 and the bottom cover 12 can be reliably installed by the combination of the screw and the nut.

[0070] To avoid the change of the position of the repeatedly deformed suspension part 23 relative to the valve body unit 10, the valve body unit 10 forms an outer locking groove 108 and an inner locking passage 109 between the valve seat 11 and the bottom cover 12, the locking passage 109 communicates the locking groove 108, and the height dimension of the locking passage 109 is smaller than that of the locking groove 108, wherein the edge of the suspension edge element 234 of the suspension part 23 has a locking arm 2341 and an outer locking protrusion 2342 connected to the locking arm 2341, the thickness dimension of the locking protrusion 2342 is greater than that of the locking arm 2341, and the locking arm 2341 and the locking protrusion 2342 of the suspension edge element 234 are arranged in the locking passage 109 and the locking groove 108 of the valve body unit 10 respectively, so that the suspension outer side 232 of the suspension part 23 is reliably connected to the valve body unit 10.

[0071] ​Preferably, the bidirectional check valve has at least one avoiding space 30 formed between the top cover 13 and the suspension part 23 to hide the suspension part 23 so that the suspension part 23 is visually invisible, wherein the top cover 13 has at least one gas passage 131 communicated with the avoiding space 30, so that when the sealing part 22 moves downward to open the flow control passage 103 of the valve body unit 10, external gas is allowed to enter the avoiding space 30 of the bidirectional check valve through the gas passage 131 of the top cover 13, so that the sealing part 22 can pull the suspension inner side 231 of the suspension part 23 downward through the connecting rod 21 to deform the suspension part 23, and correspondingly, when the sealing part 22 is pulled upward through the connecting rod 21 during the process that the suspension part 23 returns to the initial state, the gas in the avoiding space 30 of the bidirectional check valve can be discharged to the outside through the gas passage 131 of the top cover 13.

[0072] With reference to the accompanying drawings Figures 2A to 4C The bidirectional check valve further comprises a reset element 40 located in the first chamber 101 of the valve body unit 10, and the top end of the reset element 40 abuts against the suspension part 23, and the bottom end of the reset element 40 abuts against the valve seat 11, so that the reset element 40 can assist the suspension part 23 to suspend the sealing part 22 at a position closing the flow control passage 103 of the valve body unit 10 through the connecting rod 21. When the water pump 200 starts to work, the water pump 200 draws away the water in the second flow passage 105 and the second chamber 102 of the valve body unit 10 to form negative pressure in the second flow passage 105 and the second chamber 102, so as to allow the pressure in the first chamber 101 of the valve body unit 10 to be greater than the pressure in the second chamber 102, at this time, the sealing part 22 moves downward to open the flow control passage 103 of the valve body unit 10 to allow the first chamber 101 and the second chamber 102 to communicate, and the water stored in the water tank 100 is allowed to be discharged from the drinking water system in sequence through the first flow passage 104, the first chamber 101, the flow control passage 103, the second chamber 102 and the second flow passage 105 of the valve body unit 10 and the water pump 200, and during the process that the sealing part 22 moves downward, the sealing part 22 pulls the suspension inner side 231 of the suspension part 23 downward through the connecting rod 21 to deform the suspension part 23 to accumulate elastic potential energy, and at the same time, the suspension part 23 presses the reset element 40 towards the valve seat 11 to deform the reset element 40 to accumulate elastic potential energy.

[0073] When the water pump 200 is stopped, the water drawn into the second flow passage 105 and the second chamber 102 of the valve body unit 10 by the water pump 200 causes the pressure of the second chamber 102 to be greater than or equal to the pressure of the first chamber 101, and at this time the suspension portion 23 and the reset element 40 respectively pull the sealing portion 22 upward through the connecting rod 21 in the process of returning to the initial state, so that the sealing portion 22 is suspended by the suspension portion 23 at a position closing the flow control passage 103 of the valve body unit 10, and the water in the second chamber 102 of the valve body unit 10 applies pressure to the sealing portion 22, so that the sealing portion 22 is tightly attached to the valve body unit 10 to close the flow control passage 103, thereby preventing the second chamber 102 of the valve body unit 10 from communicating with the first chamber 101, so as to prevent the water from flowing back from the second chamber 102 to the first chamber 101 of the valve body unit 10.

[0074] Preferably, the reset element 40 is a compression spring, which is sleeved on the connecting rod 21, so as to avoid the reset element 40 from being inclined or misaligned in the first chamber 101 of the valve body unit 10 when the bidirectional check valve is used for a long time.

[0075] According to another aspect of the present application, the present application further provides a flow control method of the bidirectional check valve, wherein the flow control method comprises the following steps:

[0076] (a) when the pressure of the second chamber 102 of the valve body unit 10 decreases, the sealing portion 22 of the sealing unit 10 moves in the direction of the second chamber 102 of the valve body unit 10 through the connecting rod 21 to drive the suspension portion 23 to deform downward to accumulate elastic potential energy, so as to allow the sealing portion 22 to open the flow control passage 103 of the valve body unit 10 for communicating the first chamber 101 and the second chamber 102, thereby allowing the fluid to flow from the first chamber 101 to the second chamber 102 through the flow control passage 103 of the valve body unit 10; and

[0077] (b) when the pressure of the second chamber 102 of the valve body unit 10 increases, the suspension portion 23 drives the sealing portion 22 to move in the direction of the first chamber 101 through the connecting rod 21 in the process of returning to the initial state, so as to allow the sealing portion 22 to close the flow control passage 103 of the valve body unit 10, thereby preventing the fluid from flowing from the first chamber 101 to the second chamber 102 through the flow control passage 103 of the valve body unit 10, and preventing the fluid from flowing from the second chamber 102 to the first chamber 101 through the flow control passage 103 of the valve body unit 10.

[0078] Preferably, in the step (a), the holding portion 23 is allowed to press the reset element 40 towards the second chamber 102 of the valve body unit 10, so that the reset element 40 is deformed to accumulate elastic potential energy, and in the step (b), the reset element 40 is allowed to push the holding portion 23 away from the second chamber 102 of the valve body unit 10 in the process of returning to the original state.

[0079] According to another aspect of the present application, the present application further provides a manufacturing method of the bidirectional check valve, wherein the manufacturing method comprises the following steps:

[0080] (A) connecting the holding outer side 232 of the holding portion 23 to the top of the valve seat 11, so as to allow the holding portion 23 to hold the sealing portion 22 at the bottom of the valve seat 11 through the connecting rod 21 movably held in the flow control passage 103 of the valve seat 11, wherein the first chamber 101 is formed between the valve seat 11 and the holding portion 23, and the first chamber 101 is connected to the first flow passage 104 of the valve seat 11; and

[0081] (B) mounting the bottom cover 12 to the bottom of the valve seat 11, wherein the second chamber 102 is formed between the bottom cover 12 and the valve seat 11, and the second chamber 102 is connected to the second flow passage 105 of the valve seat 11.

[0082] In some embodiments of the manufacturing method of the present application, the step (A) further comprises the following steps: first, connecting the holding inner side 231 of the holding portion 23 to the rod top end 211 of the connecting rod 21, second, allowing the rod low end 212 of the connecting rod 21 to extend from the top to the bottom of the valve seat 11 through the flow control passage 103 of the valve seat 11, third, connecting the holding outer side 232 of the holding portion 23 to the top of the valve seat 11, and finally, mounting the sealing portion 22 to the rod bottom end 212 of the connecting rod 21.

[0083] It is worth mentioning that, in the above method, the way of connecting the holding inner side 231 of the holding portion 23 to the rod top end 211 of the connecting rod 21 is not limited in the manufacturing method of the present application. For example, in the attached drawings, the holding inner side 231 of the holding portion 23 is connected to the rod top end 211 of the connecting rod 21 by means of a screw. Figures 1 to 4CIn this specific example, the suspension portion 23 and the connecting rod 21 can be manufactured separately, and then the suspension portion 23 can be installed on the rod top end 211 of the connecting rod 21. Specifically, the suspension portion 23 can have a suspension portion installation cavity 235, and the rod top end 211 of the connecting rod 21 can extend into and be fixed in the suspension portion installation cavity 235 of the suspension portion 23, so as to install the suspension portion 23 on the rod top end 211 of the connecting rod 21. In some alternative examples, the suspension portion 23 can be integrally formed on the rod top end 211 of the connecting rod 21 by embedding injection process after the connecting rod 21 is manufactured. In some other alternative examples, the suspension portion 23 and the connecting rod 21 can be integrally formed by the same material.

[0084] It is also worth mentioning that the way of installing the sealing portion 22 on the rod bottom end 212 of the connecting rod 21 in the above method is not limited in the manufacturing method of the present application. For example, in the attached drawings, the sealing portion 22 can be integrally formed on the rod bottom end 212 of the connecting rod 21 by embedding injection process after the connecting rod 21 is manufactured. Figures 1 to 4C In this specific example, the sealing portion 22 has a sealing portion installation cavity 223, and the rod bottom end 212 of the connecting rod 21 can extend into and be fixed in the sealing portion installation cavity 223 of the sealing portion 22, so as to install the sealing portion 22 on the rod bottom end 212 of the connecting rod 21.

[0085] Further, before allowing the rod bottom end 212 of the connecting rod 21 to extend through the flow control passage 103 of the valve seat 11 from the top to the bottom of the valve seat 11, the step (A) further comprises a step of sleeving the reset element 40 on the connecting rod 21, so that after allowing the rod bottom end 212 of the connecting rod 21 to extend through the flow control passage 103 of the valve seat 11 from the top to the bottom of the valve seat 11, the top end and the bottom end of the reset element 40 are allowed to abut against the suspension portion 23 and the valve seat 11, respectively.

[0086] In some other embodiments of the manufacturing method of the present application, the step (A) further comprises steps of: first, allowing the rod top end 211 of the connecting rod 21 to extend through the flow control passage 103 of the valve seat 11 from the bottom to the top of the valve seat 11; second, installing the suspension inner side 231 of the suspension portion 23 on the rod top end 211 of the connecting rod 21; and third, connecting the suspension outer side 232 of the suspension portion 23 to the top of the valve seat 11.

[0087] Further, before the step (A) of mounting the hanging inner side 231 of the hanging portion 23 to the top end of the rod body 211 of the connecting rod 21 1, the manufacturing method further comprises a step of: mounting the reset element 40 to the connecting rod 21 1, so that after the step (A) of mounting the hanging inner side 231 of the hanging portion 23 to the top end of the rod body 211 of the connecting rod 21 1, the top end and the bottom end of the reset element 40 are allowed to abut against the hanging portion 23 and the valve seat 1 1, respectively.

[0088] Further, after the step (A), the manufacturing method further comprises a step of: mounting the top cover 13 to the top of the valve seat 1 1, so as to clamp the hanging outer side 232 of the hanging portion 23 by the top cover 13 and the valve seat 1 1.

[0089] Those skilled in the art will understand that the above description and the embodiments of the present application shown in the drawings are only examples and do not limit the present application. The purpose of the present application has been fully and effectively achieved. The function and structural principle of the present application has been shown and explained in the embodiments, and the embodiments of the present application can be any modification or modification without departing from the principle.

Claims

1. A two-way check valve, characterized in that, include: A valve body unit, wherein the valve body unit has a first chamber, a second chamber, a flow control channel, a first flow path, and a second flow path, the first chamber and the second chamber are arranged vertically and connected through the flow control channel, the first flow path is connected to the first chamber, and the second flow path is connected to the second chamber; and A sealing unit includes a connecting rod, a sealing portion, and a deformable suspension portion. The connecting rod extends from the first chamber of the valve body unit through the flow control channel toward the second chamber. The sealing portion is disposed at the bottom end of the connecting rod. The inner and outer suspension sides of the suspension portion are connected to the top end of the connecting rod and the valve body unit respectively, such that the suspension portion closes the upper opening of the first chamber of the valve body unit. The sealing portion is suspended by the suspension portion through the connecting rod. When the pressure in the first chamber of the valve body unit is less than or equal to the pressure in the second chamber and the first chamber is under positive pressure, the suspension portion suspends the sealing portion in a position that closes the flow control channel of the valve body unit through the connecting rod. When the pressure in the first chamber of the valve body unit is greater than the pressure in the second chamber and the second chamber is under negative pressure, the suspension portion suspends the sealing portion in a position that opens the flow control channel of the valve body unit through the connecting rod.

2. The bidirectional check valve according to claim 1, wherein the top surface of the sealing portion is provided to conform to or move away from the bottom surface of the valve body unit for forming the flow control channel, so as to allow the sealing portion to close or open the flow control channel of the valve body unit.

3. The bidirectional check valve according to claim 1, wherein the outer wall of the sealing portion is provided to conform to or move away from the inner wall of the valve body unit for forming the flow control channel, so as to allow the sealing portion to close or open the flow control channel of the valve body unit.

4. The bidirectional check valve according to claim 1, wherein the connecting rod extends from the first chamber of the valve body unit through the flow control channel to the second chamber.

5. The bidirectional check valve according to claim 1, wherein the sealing part is installed at the bottom end of the connecting rod; or, the sealing part is integrally formed at the bottom end of the connecting rod; or, the sealing part and the connecting rod are an integral structure.

6. The bidirectional check valve according to claim 1, wherein the suspension portion is mounted on the top end of the connecting rod; or, the suspension portion is integrally formed on the top end of the connecting rod; or, the suspension portion and the connecting rod are an integral structure.

7. The bidirectional check valve according to claim 1, wherein the suspension portion further comprises an annular suspension element and an annular suspension edge element integrally extending outward from the suspension element, the inner side of the suspension element forming the inner suspension side of the suspension portion, and the outer side of the suspension edge element forming the outer suspension side of the suspension portion, wherein the longitudinal cross-section of the suspension edge element forms an arch shape.

8. The bidirectional check valve according to claim 1, wherein the valve body unit further includes a valve seat and a bottom cover, wherein the first chamber, the flow control channel, the first flow channel and the second flow channel are formed in the valve seat, the bottom cover is installed on the bottom of the valve seat to form the second flow channel between the bottom cover and the valve seat, wherein the outer side of the suspension portion is connected to the top of the valve seat to close the upper opening of the first chamber of the valve body unit by the suspension portion.

9. The bidirectional check valve according to claim 8, wherein the valve body unit further includes a top cover, the top cover being mounted on top of the valve seat in such a manner that the top cover and the valve seat clamp the suspended outer side of the suspended portion.

10. The bidirectional check valve according to claim 9, wherein the bidirectional check valve has a clearance space formed between the top cover and the suspension portion, wherein the top cover has at least one gas passage communicating with the clearance space.

11. The bidirectional check valve according to any one of claims 1 to 10, wherein the bidirectional check valve further comprises a reset element located in the first chamber of the valve body unit, the top end of the reset element abutting the suspension portion, and the bottom end of the reset element abutting the valve body unit.

12. A flow control method for a two-way check valve, characterized in that, The bidirectional check valve is the bidirectional check valve according to claim 1, and the flow control method includes the following steps: (a) When the pressure in a second chamber of a valve body unit decreases and the second chamber is under negative pressure, a sealing part of a sealing unit moves toward the second chamber of the valve body unit and drives a suspension part to deform downward through a connecting rod to accumulate elastic potential energy, so as to allow the sealing part to open a flow control channel of the valve body unit for connecting a first chamber and a second chamber, thereby allowing fluid to flow from the first chamber of the valve body unit to the second chamber through the flow control channel; and (b) When the pressure in the second chamber of the valve body unit increases and the first chamber is under positive pressure, the suspension portion moves the sealing portion toward the first chamber via the connecting rod during the process of returning to the initial state, so as to allow the sealing portion to close the flow control channel of the valve body unit, thereby preventing fluid from flowing from the first chamber of the valve body unit to the second chamber through the flow control channel, and preventing fluid from flowing from the second chamber of the valve body unit to the first chamber through the flow control channel.

13. The flow control method according to claim 12, wherein in step (a), the suspension portion is allowed to press a reset element toward the second chamber of the valve body unit so that the reset element deforms and accumulates elastic potential energy, and in step (b), the reset element is allowed to push the suspension portion toward the second chamber of the valve body unit away from the valve body unit during the process of restoring the initial state.

14. A method for manufacturing a two-way check valve, characterized in that, The manufacturing method is used to manufacture the bidirectional check valve as described in claim 1, wherein the manufacturing method includes: (A) A suspension portion is connected to the top of a valve seat via a connecting rod movably held in a flow control channel of the valve seat, allowing the suspension portion to suspend a sealing portion at the bottom of the valve seat via a connecting rod, wherein a first chamber is formed between the valve seat and the suspension portion, and the first chamber communicates with the first flow channel of the valve seat; and (B) Install a bottom cover at the bottom of the valve seat, wherein a second chamber is formed between the bottom cover and the valve seat, and the second chamber is connected to a second flow channel of the valve seat.

15. The manufacturing method according to claim 14, wherein step (A) further comprises: (A.1) Allows the bottom end of the connecting rod to extend from the top to the bottom of the valve seat through the flow control channel of the valve seat; (A.2) Connecting the outer side of the suspension portion to the top of the valve seat; and (A.3) Install the sealing part at the bottom end of the connecting rod.

16. The manufacturing method according to claim 14, wherein step (A) further comprises: (A.1') Allows the tip of the connecting rod to extend from the bottom to the top of the valve seat through the flow control channel of the valve seat; (A.2') The inner side of the suspension part is installed at the top end of the connecting rod; and (A.3') Connect the outer side of the suspension part to the top of the valve seat.

17. The manufacturing method according to claim 15, wherein in step (A.2), the suspension portion is mounted on the top end of the connecting rod; or, the suspension portion is integrally formed on the top end of the connecting rod; or, the suspension portion and the connecting rod are an integral structure.

18. The manufacturing method according to claim 16, wherein in the above method, the sealing part is installed at the bottom end of the connecting rod; or, the sealing part is integrally formed at the bottom end of the connecting rod; or, the sealing part and the connecting rod are an integral structure.

19. The manufacturing method according to claim 15, wherein, prior to step (A.1), step (A) further comprises the step of: fitting a reset element onto the connecting rod so that, after step (A.2), the top and bottom ends of the reset element abut against the suspension portion and the valve seat, respectively.

20. The manufacturing method according to claim 16, wherein, prior to step (A.2'), step (A) further comprises the step of: fitting a reset element onto the connecting rod so that, after step (A.2'), the top and bottom ends of the reset element abut against the suspension portion and the valve seat, respectively.

21. The manufacturing method according to any one of claims 14 to 20, wherein after step (A), the manufacturing method further comprises the step of: installing a top cover on the top of the valve seat to clamp the outer side of the suspension portion by the top cover and the valve seat.

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