Check valve, check device and electrical equipment

Abstract

The utility model belongs to the technical field of electrical equipment, particularly relates to a check valve, a check device and electrical equipment, and aims to solve the technical problem of unreliable sealing after long-term use of the check valve to a certain extent so as to improve the sealing performance of the check valve. The check valve comprises a valve seat, a valve element and a supporting piece, the valve seat is provided with a communicating port, the valve element is arranged in the valve seat, the valve element is provided with a sealing head capable of moving in a reciprocating mode so as to open and close the communicating port, the supporting piece is rotatably connected to the valve seat, and the supporting part is connected with the valve element so that the sealing head can abut against the communicating port. The sealing reliability and the sealing effect of the sealing head can be improved, and good practicability is achieved.

Description

Technical Field

[0001] This application belongs to the technical field of electrical equipment, and particularly relates to a check valve, a check device, and an electrical equipment. Background Art

[0002] Electrical equipment is currently widely used in daily life, especially in the kitchen and bathroom fields. Appliances such as dishwashers, water purifiers, washing machines, and water heaters are widely used. In these electrical equipment, there is basically water flow. Especially after the water is discharged outside the electrical equipment after being processed by the above-mentioned electrical equipment, a check valve needs to be set to prevent the discharged water from flowing back into the electrical equipment and affecting the operation of the electrical equipment.

[0003] In the related art, after long-term use of the check valve, there will be a problem of unreliable sealing, which reduces the sealing performance of the check valve. Summary of the Invention

[0004] This application provides a check valve, a check device, and an electrical equipment, aiming to at least to a certain extent solve the technical problem that the sealing of the check valve is unreliable after long-term use, so as to improve the sealing performance of the check valve.

[0005] In the first aspect of this application, a check valve is provided. The check valve includes: a valve seat provided with a communication port; a valve core disposed in the valve seat, the valve core having a reciprocating sealing head to open and close the communication port; a support member rotatably connected to the valve seat, the support member being provided with a support portion, and the support portion being connected to the valve core so that the sealing head abuts against the communication port.

[0006] For the check valve provided by this application, since the valve seat of the check valve is provided with a communication port, the valve core is disposed in the valve seat, and the valve core has a reciprocating sealing head to open and close the communication port, the corresponding pipeline can be opened and closed to achieve the check function. Since the support member is rotatably connected to the valve seat, under the condition that the communication port is opened, the valve core drives the support member to rotate. Under the condition that the communication port is closed, the support portion of the support member restricts the movement of the sealing head in the valve seat so that the sealing head abuts against the communication port, thereby improving the reliability and sealing effect of the sealing of the sealing head, and having good practicability.

[0007] In some embodiments, the valve seat is provided with a valve cavity and a valve cover. The communication port is disposed at one end of the valve cavity, and the valve cover is disposed at the other end of the valve cavity. The valve core is disposed within the valve cavity and includes: a core body connected within the valve cavity, a sealing head disposed on the head of the core body, at least a portion of the sealing head being elastic; a pull rod having one end connected to the sealing head and the other end movably extending out of the valve seat and connected to the supporting portion; and a first restoring member having one end connected to the sealing head or the pull rod and the other end connected to the valve cover. Under the condition that the communication port is open, the pull rod and the sealing head move away from the communication port, and the pull rod drives the supporting portion of the supporting member to cause the supporting member to rotate. At the same time, the first restoring member deforms; under the condition that the communication port is closed, the first restoring member restores deformation, forcing the pull rod and the sealing head to move toward the communication port to close the communication port. At the same time, the pull rod drives the supporting member to rotate to the initial position, and the supporting portion of the supporting member restricts the movement of the sealing head within the valve seat to improve the sealing reliability and sealing effect of the sealing head.

[0008] In some embodiments, one end of the pull rod is inserted into the back of the sealing head.

[0009] In some embodiments, one end of the pull rod is provided with a first protrusion, and the first protrusion is disposed within the sealing head; a second protrusion is disposed on the circumference of the pull rod, and the second protrusion can abut against the back of the sealing head to further improve the connection reliability between the pull rod and the sealing head.

[0010] In some embodiments, when one end of the first restoring member is connected to the pull rod, a third protrusion is disposed on the circumferential surface of the pull rod, and the first restoring member is disposed between the third protrusion and the valve cover.

[0011] In some embodiments, the valve cover is provided with a clamping portion, and the clamping portion is disposed in the valve cavity with a gap. The back of the core body is clamped between the clamping portion and the valve seat to achieve the connection of the valve core within the valve seat.

[0012] In some embodiments, a sealing protrusion is disposed on the outer side and / or the inner side of the circumferential surface of the back of the core body to improve the connection reliability of the valve core within the valve seat.

[0013] In some embodiments, the other end of the pull rod is inserted into the supporting portion.

[0014] In some embodiments, the check valve further includes: a driving member connected to the valve seat, the driving member having a telescopic output end, and the telescopic end of the driving member is connected to the supporting member to drive the supporting member to rotate on the bracket to assist in opening the communication port.

[0015] In some embodiments, the check valve further includes: a bracket connected to the valve seat, the support member having a connecting portion, the connecting portion being rotatably connected to the bracket, and the support member being reciprocally swingable about its connecting portion.

[0016] In some embodiments, a driving portion is provided on the support member, the driving portion is disposed between the support portion and the connecting portion, and the driving portion is connected to the output end of the driving member.

[0017] In some embodiments, the driving member includes: a driving housing disposed between the bracket and the valve seat; a telescopic body disposed within the driving housing, the telescopic body having a telescopic end that reciprocates linearly; a push rod connected to the telescopic end of the telescopic body, the push rod being extendable out of the driving housing, the push rod being configured as the output end of the driving member; and a second reset member connected between the telescopic end of the telescopic body and the driving housing. Under the condition that the communication port is opened, the telescopic end of the telescopic body extends, driving the support member to rotate, so as to drive the pull rod and the sealing head to move away from the communication port to open the communication port. At the same time, the second reset member deforms; under the condition that the communication port is closed, the second reset member restores its deformation, forcing the telescopic end of the telescopic body to return to its position, driving the support member to rotate to the initial position, so as to drive the pull rod and the sealing head to move towards the communication port to close the communication port.

[0018] In some embodiments, a guiding block is disposed between the push rod and the telescopic end of the telescopic body, and the guiding block is slidably disposed within the driving housing to guide the movement of the push rod.

[0019] In some embodiments, the telescopic body is a wax motor to reduce costs.

[0020] In some embodiments, a sliding groove is provided on the side of the support member, the sliding groove having a first end and a second end, and the first end and the second end of the sliding groove being in communication; the check valve further includes a retaining member rotatably connected to the valve seat, the retaining member having a retaining portion, the retaining portion being movably connected in the sliding groove along a set direction, and during the process of the driving member driving the support member to rotate on the bracket, the retaining portion can be retained within the sliding groove so that, under the condition that the communication port is opened, the driving member can stop working to reduce energy loss.

[0021] In some embodiments, the depth of the first end of the sliding groove is less than the depth of the second end of the sliding groove, so that the retaining portion of the retaining member can only be movably connected in the sliding groove along a set direction.

[0022] In some embodiments, an arc-shaped holding section is provided in the middle of the chute, the holding section is disposed below the first end of the chute, the center of the holding section is disposed below the holding section, and during the process of the driving member driving the support member to rotate on the bracket, the holding portion can be held at the top of the holding section.

[0023] In some embodiments, the chute further includes: a first chute body, the top end of which is configured as the first end; a second chute body, one end of which is connected to the bottom end of the first chute body, and the other end of which is connected to one end of the holding section, and the height of the other end of the second chute body is higher than the height of one end of the second chute body; a third chute body, the bottom end of which is connected to the other end of the holding section, and the top end of which is configured as the second end.

[0024] In some embodiments, the depth of the bottom end of the first chute body is greater than the depth of one end of the second chute body, the depth of the other end of the second chute body is greater than the depth of one end of the holding section, and the depth of the other end of the holding section is greater than the depth of the bottom end of the third chute body.

[0025] In some embodiments, the bottom surfaces of the first chute body, the second chute body, the holding section, and the third chute body are parallel planes.

[0026] In some embodiments, the depth of the chute decreases sequentially from the first end to the second end.

[0027] In some embodiments, the check valve further includes a holder, the holder is provided on at least one side of the support member, and the chute is provided on the holder.

[0028] In some embodiments, the holding member includes a first connecting rod, a second connecting rod, and a third connecting rod. The first connecting rod is rotatably connected to the valve seat, the third connecting rod is connected to the first connecting rod through the second connecting rod, and the third connecting rod is configured as the holding portion.

[0029] In some embodiments, chutes are provided on both sides of the support member, two third connecting rods are oppositely arranged, and the two third connecting rods are slidably connected to the corresponding chutes.

[0030] In some embodiments, a rotating groove is provided on the top of the valve seat, and the first connecting rod is rotatably connected in the rotating groove; a limiting seat is provided on the driving member, at least a part of the limiting seat is disposed on the rotating groove, and a guiding portion for the third connecting rod to pass through is provided on the limiting seat.

[0031] In some embodiments, mounting grooves are provided on the side walls of the support housing, and lugs are provided on the drive housing. The lugs and the mounting grooves are correspondingly arranged, and the lugs are hung in the corresponding mounting grooves so that the drive housing is assembled on the support housing.

[0032] In a second aspect of the present application, the present application provides a check valve device, which includes: a pipeline having a water inlet end and a water outlet end; the above-mentioned check valve, and the communication port of the check valve can connect the water inlet end and the water outlet end.

[0033] The check valve device provided by the present application can improve the sealing reliability and sealing effect of the sealing head, and has good practicability.

[0034] In some embodiments, the included angle between the center line of the communication port and the center line of the water inlet end is an obtuse angle.

[0035] In a third aspect of the present application, the present application provides an electrical device, which includes the above-mentioned check valve device.

[0036] The electrical device with the above-mentioned check valve device can improve the sealing reliability and sealing effect of the sealing head, and has good practicability.

[0037] In some embodiments, the electrical device includes: a container, a drainage pump, an input end communicating with the container, and an output end communicating with the water inlet end of the check valve device.

[0038] In some embodiments, the electrical device further includes: an auxiliary check valve device e, including an auxiliary pipeline and an auxiliary valve core. The auxiliary pipeline is connected between the output end of the drainage pump and the water inlet end of the check valve device, and the auxiliary valve core is disposed on the auxiliary pipeline in an openable manner.

[0039] In some embodiments, a connecting protrusion is provided at the end of the auxiliary pipeline, and the auxiliary valve core is snap-fitted on the connecting protrusion. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0041] Figure 1 shows a schematic structural diagram of the check valve device in one or more embodiments of the present application;

[0042] Figure 2 shows Figure 1Top view schematic diagram;

[0043] Figure 3 Shows Figure 1 A - A cross - sectional schematic diagram of;

[0044] Figure 4 Shows Figure 2 B - B cross - sectional schematic diagram of;

[0045] Figure 5 Shows Figure 1 Explosion schematic diagram of;

[0046] Figure 6 Shows Figure 1 Schematic diagram of the assembly structure of the valve seat on the pipeline in;

[0047] Figure 7 Shows Figure 6 Schematic diagram of the structure from another perspective of;

[0048] Figure 8 Shows Figure 6 Cross - sectional schematic diagram of;

[0049] Figure 9 Shows Figure 1 Schematic diagram of the structure of the valve core in;

[0050] Figure 10 Shows Figure 9 Cross - sectional schematic diagram of;

[0051] Figure 11 Shows Figure 1 Schematic diagram of the structure of the pull rod in;

[0052] Figure 12 Shows Figure 1 Schematic diagram of the structure of the support member of;

[0053] Figure 13 Shows Figure 1 Schematic diagram of the structure of the bracket in;

[0054] Figure 14 Shows Figure 1 Schematic diagram of the structure of the driving member in;

[0055] Figure 15 Shows Figure 14 Cross - sectional schematic diagram of;

[0056] Figure 16 Shows the schematic diagram of the structure of the check valve device with a cage and a retaining member;

[0057] Figure 17 Shows Figure 16 Cross - sectional schematic diagram of;

[0058] Figure 18 shows Figure 16 a schematic structural diagram of the support in

[0059] Figure 19 shows Figure 18 a schematic structural diagram of another perspective of

[0060] Figure 20 shows Figure 16 a schematic structural diagram of the holding member of

[0061] Figure 21 shows Figure 16 a schematic structural diagram of the valve cover in

[0062] Figure 22 shows Figure 16 a schematic structural diagram of the bracket in

[0063] Figure 23 shows Figure 16 a schematic structural diagram of the check valve device with a detection switch;

[0064] Figure 24 shows a schematic structural diagram of the electrical equipment in one or more embodiments of the application;

[0065] Figure 25 shows Figure 24 a schematic cross-sectional view of

[0066] Figure 26 shows Figure 24 a schematic structural diagram of the auxiliary check valve device in

[0067] Figure 27 shows Figure 26 an assembly schematic diagram of the auxiliary check valve device of

[0068] Explanation of reference numerals:

[0069] Pipeline - a, water inlet end - a1, water outlet end - a2;

[0070] Check valve - b;

[0071] Valve seat - 1, communication port - 11, valve cavity - 12, valve cover - 13, clamping part - 131, first connecting plate - 14, rotating groove - 15;

[0072] Valve core - 2, core body - 21, sealing protrusion - 211, sealing head - 22, pull rod - 23, first protrusion - 231, second protrusion - 232, third protrusion - 233, limit post - 234, fourth protrusion - 235, first reset member - 24;

[0073] Support member - 3, support portion - 31, connecting portion - 32, slot - 321;

[0074] Bracket - 4, support block - 41, support housing - 42, mounting groove - 421, second connecting plate - 422, cantilever - 43, detection switch - 44, limit seat - 45, guiding portion - 46;

[0075] Driver - 5, drive housing - 51, telescopic body - 52, ejector rod - 53, second reset member - 54, guiding block - 55, hanging ear - 56;

[0076] Assembly cavity - 6;

[0077] Container - c;

[0078] Drain pump - d;

[0079] Auxiliary check valve device - e;

[0080] Auxiliary pipeline - 7, connecting protrusion - 71;

[0081] Auxiliary valve core - 8, snap ring - 81;

[0082] Cage - 9, chute - 91, first groove body - 911, second groove body - 912, holding section - 913, third groove body - 914, first step - 915, second step - 916, third step - 917, fourth step - 918;

[0083] Retention member - 10, first connecting rod - 101, second connecting rod - 102, third connecting rod - 103. Detailed implementation manners

[0084] In order to enable those skilled in the art in the technical field to which the present application belongs to understand the present application more clearly, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present application.

[0085] In the related art, the check valve device includes a pipeline and a check valve. The pipeline has a water inlet end and a water outlet end. The check valve is arranged on the pipeline, and the check valve is provided with a communication port that can connect the water inlet end and the water outlet end. When the electrical equipment drains water, the communication port of the check valve is opened, and the water flows through the check valve device to the drain pipe. After the drainage is completed, the communication port of the check valve is closed to prevent the residual water remaining in the drain pipe from flowing back.

[0086] However, the valve core of the check valve is made of flexible rubber material, and deformation will occur after long-term use, resulting in unreliable sealing and reducing the sealing performance of the check valve.

[0087] Based on the above technical problems, the present application provides a check valve, a check valve device, and an electrical equipment, aiming to at least to a certain extent solve the technical problem that the sealing of the check valve is unreliable after long-term use, so as to improve the sealing performance of the check valve.

[0088] Figure 1 The structural schematic diagram of the check valve device in one or more embodiments of the present application is shown, Figure 2 is shown Figure 1 in a top view schematic diagram of Figure 3 is shown Figure 1 in an A-A cross-sectional schematic diagram of Figure 4 is shown Figure 2 in a B-B cross-sectional schematic diagram of. Combining Figures 1 - 4 , and consistent with the related art, the check valve device provided by the present application also includes a pipeline a and a check valve b. The pipeline a has a water inlet end a1 and a water outlet end a2. The check valve b is arranged on the pipeline a. The check valve b is provided with a communication port 11, and the communication port 11 can connect the water inlet end a1 and the water outlet end a2.

[0089] Figure 5 is shown Figure 1 in an exploded schematic diagram of. Combining Figures 1 - 5 , the check valve b of the present application includes a valve seat 1, a valve core 2, and a support member 3. The valve seat 1 is provided with a communication port 11. The valve core 2 is arranged in the valve seat 1. The valve core 2 has a reciprocating sealing head 22 to open and close the communication port 11 to connect or block the water inlet end a1 and the water outlet end a2. The support member 3 is rotatably connected to the valve seat 1. The support member 3 is provided with a support portion 31, and the support portion 31 is connected to the valve core 2 to limit the movement of the sealing head 22 in the valve seat 1 so that the sealing head 22 abuts against the communication port 11.

[0090] For the check valve b provided by the present application, since the valve seat 1 of the check valve b is provided with a communication port 11, the valve core 2 is arranged in the valve seat 1, and the valve core 2 has a reciprocating sealing head 22 to open and close the communication port 11, the corresponding pipeline a can be opened and closed to realize the check valve function. Since the support member 3 is rotatably connected to the valve seat 1, under the condition that the communication port 11 is opened, the valve core 2 drives the support member 3 to rotate. Under the condition that the communication port 11 is closed, the support portion 31 of the support member 3 limits the movement of the sealing head 22 in the valve seat 1 so that the sealing head 22 abuts against the communication port 11 to improve the sealing reliability and sealing effect of the sealing head 22, and has good practicability.

[0091] Figure 6 is shown Figure 1Schematic diagram of the assembly structure of the valve seat on the pipeline Figure 7 shows Figure 6 a schematic diagram of another perspective of Figure 8 shows Figure 6 a schematic sectional view of Figures 1 - 8 Combined with Figures 1 - 8 , in some embodiments, the valve seat 1 may be provided with a valve cavity 12 and a valve cover 13. The communication port 11 is provided at one end of the valve cavity 12, and the valve cover 13 is provided at the other end of the valve cavity 12 to seal the valve cavity 12.

[0092] Figure 9 shows Figure 1 a schematic diagram of the structure of the valve core in Figure 10 shows Figure 9 a schematic sectional view of Figures 3 - 5 and Figures 9 - 10 Combined with Figure Figures 3 - 5 and Figures 9 - 10 , in some embodiments, the valve core 2 is arranged in the valve cavity 12. The valve core 2 includes a core body 21, a pull rod 23 and a first reset member 24. The core body 21 is connected in the valve cavity 12, and a sealing head 22 is arranged on the head of the core body 21. At least part of the sealing head 22 has elasticity; one end of the pull rod 23 is connected to the sealing head 22, the other end of the pull rod 23 can extend out of the valve seat 1 movably and is connected to the support portion 31, and one end of the first reset member 24 is connected to the sealing head 22 or the pull rod 23, and the other end of the first reset member 24 is connected to the valve cover 13. Under the condition that the communication port 11 is opened, the pull rod 23 and the sealing head 22 move away from the communication port 11. The pull rod 23 drives the support portion 31 of the support member 3 to rotate the support member 3. At the same time, the first reset member 24 deforms; under the condition that the communication port 11 is closed, the first reset member 24 restores deformation, forcing the pull rod 23 and the sealing head 22 to move towards the communication port 11 to close the communication port 11. At the same time, the pull rod 23 drives the support member 3 to rotate to the initial position, and the support portion 31 of the support member 3 restricts the movement of the sealing head 22 in the valve seat 1 to improve the sealing reliability and sealing effect of the sealing head 22.

[0093] Combined with Figure 4 and Figure 8, in some embodiments, the angle between the center line of the communication port 11 and the center line of the water inlet end a1 is an obtuse angle. When the electrical equipment drains water, the water flow enters from the water inlet end a1 of the check valve device. Since the angle between the center line of the communication port 11 and the center line of the water inlet end a1 is an obtuse angle, the water flow impacts the sealing head 22 of the valve core 2, forcing the pull rod 23 and the sealing head 22 to move away from the communication port 11. The pull rod 23 drives the supporting part 31 of the supporting member 3, causing the supporting member 3 to rotate. At the same time, the first reset member 24 deforms; when the drainage of the electrical equipment ends, the water flow stops flowing in from the water inlet end a1 of the check valve device, and the first reset member 24 restores its deformation, forcing the pull rod 23 and the sealing head 22 to move towards the communication port 11 to close the communication port 11. At the same time, the pull rod 23 drives the supporting member 3 to rotate to the initial position, and the supporting part 31 of the supporting member 3 restricts the movement of the sealing head 22 in the valve seat 1 to improve the sealing reliability and sealing effect of the sealing head 22.

[0094] It should be noted that the water inlet end a1 and the water outlet end a2 of the check valve device can be coaxially arranged or can be arranged at a certain angle, which is not limited herein.

[0095] Combined with Figures 9 - 10 , in some embodiments, the sealing head 22 can be made of an elastic material so that it can move together with the pull rod 23. In addition, the core body 21 is axially penetrated, the sealing head 22 is connected to its front end, and the rear end of the core body 21 can be connected to the valve seat 1.

[0096] In some embodiments, the core body 21 can be made of the same elastic material as the sealing head 22, and the sealing head 22 and the core body 21 can be integrally formed. While the sealing head 22 and the pull rod 23 move together, the core body 21 can also deform accordingly to adapt to the movement of the sealing head 22.

[0097] Combined with Figures 3 - 5 and Figures 9 - 10 , in some embodiments, the valve cover 13 is provided with a clamping part 131. The clamping part 131 is arranged on the side of the valve cover 13 facing the valve cavity 12, and the clamping part 131 is arranged in the valve cavity 12 with a gap. The back of the core body 21 is clamped between the clamping part 131 and the valve seat 1 to realize the connection of the valve core 2 in the valve seat 1.

[0098] Combined with Figures 9 - 10 , specifically in implementation, the clamping part 131 can be a clamping protrusion arranged on the side of the valve cover 13 facing the valve cavity 12. The clamping protrusion is generally columnar, and the back of the core body 21 is clamped between the clamping protrusion and the valve seat 1.

[0099] In order to improve the reliability of the connection of the back of the core body 21 to the valve seat 1, in some embodiments, a sealing protrusion 211 is provided on the outer side and / or the inner side of the peripheral surface of the back of the core body 21 to increase the cross-sectional size of the back of the core body 21 and improve the reliability of the connection of the valve core 2 in the valve seat 1.

[0100] Combined with Figure 3 and Figure 4 , in some embodiments, one end of the pull rod 23 can be inserted into the back of the sealing head 22 to realize the connection between the pull rod 23 and the sealing head 22.

[0101] Figure 11 Shows Figure 1 the structural schematic diagram of the pull rod in Figures 3 - 5 Combined with Figures 9 - 11 and

[0102] In some embodiments, one end of the pull rod 23 can be provided with a first protrusion 231, and the first protrusion 231 is arranged in the sealing head 22 to realize the connection between the sealing head 22 and the pull rod 23. In addition, a second protrusion 232 is arranged on the peripheral surface of the pull rod 23, and the second protrusion 232 can abut against the back of the sealing head 22. Under the condition that the communication port 11 is opened, there is a certain gap between the second protrusion 232 and the sealing head 22. Under the condition that the communication port 11 is closed, the second protrusion 232 abuts against the back of the sealing head 22 to increase the area of the pull rod 23 pushing the sealing head 22 and further improve the reliability of the connection between the pull rod 23 and the sealing head 22. Figures 3 - 5 and Figures 9 - 11 , in some embodiments, when one end of the first resetting member 24 is connected to the pull rod 23, a third protrusion 233 can be arranged on the peripheral surface of the pull rod 23, and the first resetting member 24 is arranged between the third protrusion 233 and the valve cover 13. A plurality of limiting columns 234 can be arranged at intervals on the peripheral surface of the third protrusion 233 facing the valve cover 13. The first resetting member 24 can be elastic, and it is sleeved on the pull rod 23. One end of the first resetting member 24 connected to the third protrusion 233 can be arranged between the plurality of limiting columns 234 and the pull rod 23 to improve the reliability of the connection between the first resetting member 24 and the pull rod 23.

[0103] Combined with Figures 3 - 5 and Figure 11 , in some embodiments, the other end of the pull rod 23 can be inserted into the support portion 31. Specifically, when implemented, the other end of the pull rod 23 can be provided with a fourth protrusion 235, and the fourth protrusion 235 is inserted into the support portion 31.

[0104] Combined with Figure 11, the first protrusion 231, the second protrusion 232, the third protrusion 233, and the fourth protrusion 235 can be arranged in sequence along the axial direction of the pull rod 23, and the four protrusions can all be annular. Of course, they can also be square or the like, and the present situation is not limited here.

[0105] Figure 12 shows Figure 1 a schematic structural view of the support member of Figures 1 - 5 and Figure 12 , in some embodiments, the check valve b may further include a bracket 4. The bracket 4 is connected to the valve seat 1. The support member 3 has a connecting portion 32, and the connecting portion 32 is rotatably connected to the bracket 4. The support member 3 can swing reciprocally around its connecting portion 32. Under the condition that the communication port 11 is opened, the valve core 2 drives the support member 3 to rotate around the connecting portion 32. Under the condition that the communication port 11 is closed, the valve core 2 drives the support member 3 to rotate reversely around the connecting portion 32, so that the supporting portion 31 of the support member 3 restricts the movement of the sealing head 22 in the valve seat 1, thereby improving the sealing reliability and sealing effect of the sealing head 22.

[0106] Figure 13 shows Figure 1 a schematic structural view of the bracket in Figure 2 , Figure 3 , Figure 5 , Figure 12 and Figure 13 , in specific implementation, the connecting portion 32 and the supporting portion 31 of the support member 3 can be arranged at both ends of the support member 3. The connecting portion 32 of the support member 3 can be provided with a slot 321, and the bracket 4 is provided with a support block 41. The support block 41 is arranged in the slot 321 and is rotatably connected to the connecting portion 32 of the support member 3 through a connecting member such as a pin shaft, so as to realize the rotatable setting of the support member 3 on the bracket 4.

[0107] Combined with Figure 5 and Figure 13 , in some embodiments, the bracket 4 includes a support housing 42. One side of the support housing 42 facing the valve seat 1 is open. The support housing 42 is connected to the valve seat 1 and is within the assembly cavity 6 formed by the support housing 42 and the valve seat 1.

[0108] Combined with Figure 5 and Figure 13 , in specific implementation, two or more first connecting plates 14 are arranged on the outer peripheral surface of the valve seat 1, and a second connecting plate 422 is arranged on the outer peripheral surface of the support housing 42. The second connecting plate 422 and the first connecting plate 14 are arranged corresponding to each other, and the second connecting plate 422 and the corresponding first connecting plate 14 are assembled through a connecting member such as a bolt, so as to realize the assembly of the support housing 42 on the valve seat 1, and the support block 41 can be connected to the top of the support housing 42 through a cantilever 43.

[0109] Combined with Figure 2 and Figure 3 as well as Figure 5 , since under the condition that the communication port 11 is closed, the pull rod 23 on the valve core 2 is pressed and limited by the support portion 31 of the support member 3, when it is necessary to open the communication port 11, the impact force of the flowing water may not be able to force the pull rod 23 and the sealing head 22 to move towards the support member 3 to make the support member 3 rotate so that the communication port 11 can be smoothly opened. Based on this, the check valve b of the present application is also provided with a driving member 5 to assist the support member 3 to rotate so that the communication port 11 can be smoothly opened.

[0110] Combined with Figure 2 and Figure 3 as well as Figure 5 , in some embodiments, the check valve b further includes a driving member 5. The driving member 5 is connected to the valve seat 1. The driving member 5 has a telescopic output end. The output end of the driving member 5 is connected to the support member 3 to drive the support member 3 to rotate on the bracket 4. When the electrical equipment drains water, the water flow flows in from the water inlet end a1 of the check device. Since the included angle between the center line of the communication port 11 and the center line of the water inlet end a1 is an obtuse angle, the water flow impacts the sealing head 22 of the valve core 2, forcing the pull rod 23 and the sealing head 22 to move away from the communication port 11. The pull rod 23 drives the support portion 31 of the support member 3. At the same time, the output end of the driving member 5 is controlled to extend. The pull rod 23 and the driving member 5 jointly drive the support member 3 to rotate so that the communication port 11 can be smoothly opened. During the opening process of the communication port 11, the first reset member 24 deforms; when the drainage of the electrical equipment ends, the water flow stops flowing in from the water inlet end a1 of the check device, the first reset member 24 resumes deformation, forcing the pull rod 23 and the sealing head 22 to move towards the communication port 11. At the same time, the output end of the driving member 5 is controlled to retract. The pull rod 23 and the driving member 5 jointly drive the support member 3 to rotate so that the support portion 31 of the support member 3 restricts the movement of the sealing head 22 in the valve seat 1 to improve the sealing reliability and sealing effect of the sealing head 22.

[0111] Combined with Figure 12 , in some embodiments, a driving portion 33 may be provided on the support member 3. The driving portion 33 is provided between the support portion 31 and the connecting portion 32. The driving portion 33 may be a driving protrusion provided on the support member 3 facing the driving member 5. The driving portion 33 is connected to the output end of the driving member 5 to reduce the occupied space of the check valve b. In other embodiments, the support portion 31 is provided between the driving portion and the connecting portion 32, which is not limited herein.

[0112] Figure 14 Shows Figure 1 the structural schematic diagram of the driving member in Figure 15 Shows Figure 14 the cross-sectional schematic diagram of Figure 2 and Figure 3 andFigure 5 and Figures 14 - 15 In some embodiments, the driving member 5 may include a driving housing 51, a telescopic body 52, a push rod 53, and a second reset member 54. Among them, the driving housing 51 is disposed in an assembly cavity 6 formed between the support housing 42 of the bracket 4 and the valve seat 1. The telescopic body 52 is disposed in the driving housing 51. The telescopic body 52 has a telescopic end that reciprocates linearly. The push rod 53 is connected to the telescopic end of the telescopic body 52. The push rod 53 can extend out of the driving housing 51. The push rod 53 is configured as the output end of the driving member 5. The second reset member 54 is connected between the telescopic end of the telescopic body 52 and the driving housing 51. Under the condition that the communication port 11 is opened, the telescopic end of the telescopic body 52 extends out, driving the support member 3 to rotate, so as to drive the pull rod 23 and the sealing head 22 to move away from the communication port 11 to open the communication port 11. At the same time, the second reset member 54 deforms. Under the condition that the communication port 11 is closed, the second reset member 54 recovers its deformation, forcing the telescopic end of the telescopic body 52 to return to its original position, driving the support member 3 to rotate to the initial position, so as to drive the pull rod 23 and the sealing head 22 to move towards the communication port 11 to close the communication port 11.

[0113] Combined with Figure 2 、 Figure 3 and Figure 15 In some embodiments, a guide block 55 may be provided between the push rod 53 and the telescopic end of the telescopic body 52. The guide block 55 is slidably disposed in the driving housing 51 to guide the movement of the push rod 53. Specifically, the telescopic end of the telescopic body 52 can be connected to one side of the guide block 55 by means of threads, key connections, etc. The push rod 53 can be connected to the other side of the guide block 55 by means of threads, key connections, etc. The second reset member 54 can be a spring, which is sleeved on the push rod 53, and its two ends can be respectively disposed on the guide block 55 and the inner wall of the driving housing 51, which is not limited herein.

[0114] In some embodiments, the telescopic body 52 can be a wax motor. The wax motor drives the telescopic end to expand and contract by heating wax. When the wax motor is not powered on, the second reset member 54 presses the push rod 53 against the guide block 55. When the wax motor is powered on, the wax in the wax motor expands due to heat, driving the telescopic end to extend, and then driving the push rod 53 to move outward against the pressure of the second reset member 54. The push rod 53 pushes the driving portion on the support member 3, causing the support member 3 to rotate around the connecting portion 32. The support portion 31 of the support member 3 drives the pull rod 23 and the sealing head 22 away from the communication port 11 to open the communication port 11. The wax motor only has an extending function, so its cost is relatively low. Correspondingly, the telescopic end of the wax motor needs to rely on the deformation restoring force of the second reset member 54 to return to its original position.

[0115] Combined with Figure 5 and Figures 13 - 15, in some embodiments, mounting grooves 421 are provided on the side walls of the support housing 42, and lugs 56 are provided on the drive housing 5. The lugs 56 and the mounting grooves 421 are correspondingly arranged, and the lugs 56 are hung in the corresponding mounting grooves 421 so that the drive housing 5 is assembled inside the support housing 42. Specifically, when implemented, two mounting grooves 421 may be oppositely arranged, and one side of the side wall of the mounting groove 421 is open. Correspondingly, two lugs 56 are also provided. The two lugs 56 can be pushed through the open ends of the mounting grooves 421 so as to push the lugs 56 into the corresponding mounting grooves 421, and then the support housing 42 is connected to the valve seat 1, and the drive housing 5 can be fixed between the support housing 42 and the valve seat 1. The assembly is simple, fast and reliable, and has good practicability.

[0116] In some embodiments, the output end of the drive member 5 can be connected to the drive portion of the support member 3. For example, the output end of the drive member 5 can be connected to the drive portion of the support member 3 by means of plugging, screwing or key connection. The telescopic movement of the output end of the drive member 5 drives the rotation of the support member 3. Under the condition that the communication port 11 is closed, since the output end of the drive member 5 is connected to the drive portion of the support member 3, the sealing reliability of the sealing head 22 assembled in the communication port 11 can be further improved. In other embodiments, the output end of the drive member 5 can also be separated from the drive portion of the support member 3. Under the condition that the communication port 11 is open, the telescopic end of the drive member 5 abuts against the support portion 31 of the support member 3 to drive the support member 3 to rotate to assist in opening the communication port 11. Under the condition that the communication port 11 is closed, the telescopic end of the drive member 5 returns to its original position, and the support member 3 rotates to the initial position under the action of the first return member 24 to limit the ejector rod 53 and the sealing head 22.

[0117] It should be noted that the above drive member 5 can also be a mechanism that performs linear reciprocating movement, such as a linear motor, a linear guide rail, etc., which is not limited herein.

[0118] The check valve b and the check device provided in the present application can improve the sealing reliability and sealing effect of the sealing head 22, and have good practicability.

[0119] In the above embodiments, under the condition that the communication port is opened, that is, the check valve is opened, the drive member 5 needs to keep working all the time. If the check valve includes a long opening time, the drive member 5 needs to consume more energy, which affects the use cost and has room for improvement.

[0120] Figure 16 The structural schematic diagram of the check device with a cage and a retaining member is shown, Figure 17 The Figure 16 cross-sectional schematic diagram of is shown, in combination with Figures 16 - 17, Based on the above technical problems, a chute 91 can be provided on the side of the support member 3 of the check valve b of the present application. The chute 91 has a first end and a second end, and the first end and the second end of the chute 91 communicate with each other; the check valve can further include a retaining member 10, which is rotatably connected to the valve seat 1. The retaining member 10 has a retaining portion 104, and the retaining portion 104 is movably connected in the chute 91 along a set direction. During the process of the driving member 5 driving the support member 3 to rotate on the bracket, the retaining portion 104 can be retained within the chute 91.

[0121] For the check valve with the retaining member 10, under the condition that the communication port 11 is opened, the driving member 5 drives the support member 3 to rotate around its connecting portion to open the communication port 11 and open the check valve. At the same time, it drives the retaining portion 104 of the retaining member 10 to slide in the chute 91 along the set direction. When the retaining portion 104 of the retaining member 10 is retained within the chute 91, the driving member 5 is controlled to stop working. By the retaining portion 104 of the retaining member 10 to support and hold the above support member 3, the check valve is kept open to reduce energy loss, and it has good practicability.

[0122] Figure 18 shows Figure 16 a schematic structural view of the support member 3 in Figure 19 shows Figure 18 a schematic structural view from another perspective of Figure 18 and Figure 19 , In some embodiments, the depth of the first end of the chute 91 is less than the depth of the second end of the chute 91, so that the first end and the second end of the chute 91 form a first step 915, so that the retaining portion 104 of the retaining member 10 can only be movably connected in the chute 91 along the set direction.

[0123] Combined with Figure 18 and Figure 19 , In some embodiments, an arc-shaped retaining section 913 is provided in the middle of the chute 91. The retaining section 913 is arranged below the first end of the chute 91, and the center of the retaining section 913 is arranged below the retaining section 913. During the process of the driving member 5 driving the support member 3 to rotate on the bracket 4, the retaining portion 104 can be retained at the top of the retaining section 913. Specifically, during implementation, the top of the retaining section 913 is located in the middle thereof, and both ends of the retaining section 913 are the bottoms of the retaining section 913.

[0124] Combined with Figure 18 and Figure 19, in some embodiments, the chute 91 may further include a first chute body 911, a second chute body 912, and a third chute body 914. Among them, the top end of the first chute body 911 is configured as a first end, one end of the second chute body 912 is connected to the bottom end of the first chute body 911, the other end of the second chute body 912 is connected to one end of the holding section 913, the height of the other end of the second chute body 912 is higher than the height of one end of the second chute body 912, the bottom end of the third chute body 914 is connected to the other end of the holding section 913, and the top end of the third chute body 914 is configured as a second end. During specific implementation, when the driving member 5 is not working, the holding portion 104 of the holding member 10 is located at the top end of the first chute body 911 (i.e., the first end of the chute 91). Under the condition that the driving member 5 is working, since the depth of the first end of the chute 91 is less than the depth of the second end of the chute 91, the holding portion 104 of the holding member 10 can only slide in the first chute body 911 towards the bottom direction of the first chute body 911 until it slides to the bottom of the first chute body 911. At this time, the driving member 5 stops working. Under the gravity of the support member 3, the holding portion 104 of the holding member 10 slides from the bottom of the first chute body 911 to the second chute body 912 and continues to slide to the top of the holding section 913. Due to the limitation of the holding section 913, the holding portion 104 of the holding member 10 cannot continue to slide in the holding section 913, so that the holding portion 104 is held in the chute 91. By holding and supporting the above-mentioned support member 3 through the holding portion 104 of the holding member 10, the check valve is kept open. At the same time, the driving member 5 can stop working to reduce energy consumption; when the check valve needs to be closed, the driving member 5 extends again, so that the support member 3 continues to rotate in a direction away from the driving member 5. The holding portion 104 of the holding member 10 moves in the holding section 913 towards the other end direction of the holding section 913 until it enters the bottom of the third chute body 914. At this time, the driving member 5 is controlled to stop working. Under the action of the second reset member recovering its deformation, the support member 3 is driven to rotate in the reverse direction to close the communication port 11, so that the check valve is in a closed state. At the same time, the holding portion 104 of the holding member 10 is also driven to slide in the third chute body 914 from the bottom of the third chute body 914 to the top of the third chute body 914 (i.e., the second end of the chute 91) and the top of the first chute body 911 (i.e., the first end of the chute 91) in sequence, so that the holding portion 104 of the holding member 10 rotates in the chute 91 along the set direction.

[0125] Combined with Figure 18 And Figure 19, in some embodiments, to ensure that the holding portion 104 of the holding member 10 can rotate in the sliding groove 91 along a set direction, the depth of the bottom end of the first groove body 911 is greater than the depth of one end of the second groove body 912 to form a second step 916, the depth of the other end of the second groove body 912 is greater than the depth of one end of the holding section 913 to form a third step 917, and the depth of the other end of the holding section 913 is greater than the depth of the bottom end of the third groove body 914 to form a fourth step 918. Under this condition, the bottom surfaces of the first groove body 911, the second groove body 912, the holding section 913, and the third groove body 914 are parallel planes to enable the holding portion 104 of the holding member 10 to rotate in the sliding groove 91 along a set direction.

[0126] In other embodiments, the depth of the sliding groove 91 can gradually decrease from the first end to the second end, that is, in the plane where the sliding groove 91 extends from its first end to the second end, the technical effect that the holding portion 104 of the holding member 10 can rotate in the sliding groove 91 along a set direction can also be achieved.

[0127] Combined with Figure 16 and Figure 17 , in some embodiments, the check valve b may further include a holding frame 9. The holding frame 9 is provided on at least one side of the support member 3, and the sliding groove 91 is provided on the holding frame 9. The holding member 10 can be integrally formed with the support member, and the top of the holding member 10 can protrude from the top of the support member 3 to realize the rotation path of the holding portion 104 of the holding member 10 in the sliding groove 91.

[0128] Figure 20 Shows Figure 16 the structural schematic diagram of the holding member, combined with Figure 20 , in some embodiments, the holding member 10 may include a first connecting rod 101, a second connecting rod 102, and a third connecting rod 103. The first connecting rod 101 is rotatably connected to the valve seat, and the third connecting rod 103 is connected to the first connecting rod 101 through the second connecting rod 102. The third connecting rod 103 is configured as the holding portion 104.

[0129] During specific implementation, sliding grooves 91 can be provided on both sides of the support member 3. There are two third connecting rods 103 arranged oppositely, and the two third connecting rods 103 are slidably connected in the corresponding sliding grooves 91 to keep the holding and support of the support member 3 in a balanced state.

[0130] Figure 21 Shows Figure 16 the structural schematic diagram of the valve cover in Figure 16 , Figure 17 and Figure 21 , in some embodiments, a rotating groove 15 is provided at the top of the valve seat 1 (valve cover 13), and the first connecting rod 101 is rotatably connected in the rotating groove 15; Figure 22shows Figure 16 a schematic structural diagram of the bracket in Figure 16 , Figure 17 and Figure 22 , a limit seat 45 can be arranged on the bracket 4, at least part of the limit seat 45 is arranged on the rotation groove 15 to prevent the first connecting rod 101 from running out of the rotation groove 15. At the same time, a guiding part 46 for the third connecting rod 103 to move through is arranged on the limit seat 45, and the guiding part 46 can be in the shape of a hole or an inverted groove to provide guidance for the swing of the third connecting rod 103.

[0131] During specific implementation, the limit seat 45 can be integrally formed on the top of the bracket 4 and extend out of the side of the bracket 4 to press on the rotation groove 15. In some embodiments, the limit seat 45 can be arranged corresponding to the third connecting rod 103, that is, each third connecting rod 103 correspondingly passes through a limit seat 45; in other embodiments, only one limit seat 45 can be arranged, and two guiding parts 46 can be arranged on the limit seat 45, each third connecting rod 103 correspondingly passes through a guiding part 46, or, one guiding part 46 can be arranged on the limit seat 45, and two third connecting rods 103 jointly pass through one guiding part 46, which is not limited herein.

[0132] Figure 23 shows Figure 16 a schematic structural diagram of a backflow prevention device with a detection switch, combined with Figure 23 , in addition, a detection switch 44 is arranged on the bracket 4. When the check valve is in the closed state, the support 3 contacts the detection switch 44 to confirm whether the support 3 rotates in place and to confirm that the check valve is in the closed state.

[0133] Based on the above backflow prevention device, the present application also provides an electrical device, and the electrical device includes the above backflow prevention device.

[0134] The electrical device with the above backflow prevention device can improve the sealing reliability and sealing effect of the sealing head 22, and has good practicability.

[0135] In some embodiments, the electrical device can be a dishwasher, or can be a water purifier, a washing machine, a water heater, etc., which is not limited herein. Taking the dishwasher as an example, the electrical device equipped with the above backflow prevention device is further described below.

[0136] Figure 24 shows a schematic structural diagram of the electrical device in one or more embodiments of the application, Figure 25 shows Figure 24 a schematic cross-sectional view of Figure 24 and Figure 25, the dishwasher includes a drain pump d and a container c for holding water. The input end of the drain pump d is in communication with the container c, and the output end of the drain pump d is in communication with the water inlet end a1 of the check valve device. When the dishwasher drains water, the drain pump d pumps the water in the container c into the pipe a of the check valve device, forcing the communication port 11 of the check valve b to open, and the water flows through the check valve device to the drain pipe. After the drainage is completed, the communication port 11 of the check valve b closes to prevent the residual water remaining in the drain pipe a from flowing back into the container c.

[0137] Combined with Figure 24 and Figure 25 , in some embodiments, the electrical device may further include an auxiliary check valve device e. Figure 26 Shows Figure 24 The structural schematic diagram of the auxiliary check valve device in Figure 27 Shows Figure 26 The assembly schematic diagram of the auxiliary check valve device of Figure 26 and Figure 27 , the auxiliary check valve device e includes an auxiliary pipe 7 and an auxiliary valve core 8. The auxiliary pipe 7 is connected between the output end of the drain pump and the water inlet end of the check valve device, and the auxiliary valve core 8 is disposed on the auxiliary pipe 7 in an openable manner. When the electrical device drains water, the wax motor is energized in advance. After the water inlet end a1 and the water outlet end a2 of the check valve device are in communication, the drain pump is started, and the water in the container impacts the auxiliary valve core 8, and the auxiliary pipe 7 of the auxiliary check valve device e opens, and the water enters the drain pipe through the auxiliary check valve device e and the check valve device; after the drainage stops, the wax motor stops being energized. During the reset of the valve core of the check valve device, the residual water in the drain pipe flows in the pipeline under the action of gravity. After flowing through the auxiliary check valve device e, it is blocked by the auxiliary valve core 8 of the auxiliary check valve device e. After the valve core of the check valve device is reset, the water inlet end a1 and the water outlet end a2 of the check valve device are disconnected. That is, the auxiliary check valve device e uses the elasticity of the auxiliary valve core 8 itself to seal the pipeline, and the action is relatively fast, but it is easy to leak. The sealing stability of the check valve b is good, but due to the working characteristics of the wax motor, the action is relatively slow. By combining the two check valves in this application, the residual water in the drain pipeline can be prevented from flowing back into the container, which has good practicability.

[0138] Combined with Figure 26 and Figure 27 , in some embodiments, a connecting protrusion 71 may be provided at the end of the auxiliary pipe 7, and the auxiliary valve core 8 is snap-fitted on the connecting protrusion 71. The auxiliary valve core 8 may be sheet-shaped, with dimensions roughly the same as those of the auxiliary pipe 7 and having elasticity. Under the impact of water flow, the auxiliary valve core 8 can deform, so that a gap is generated between the auxiliary valve core 8 and the auxiliary pipe 7 to allow the water flow to pass through.

[0139] In some embodiments, the auxiliary pipeline 7 can be sleeved inside the water inlet end a1 of the pipeline a. The auxiliary valve core 8 is arranged at one end where the auxiliary pipeline 7 is connected to the pipeline a. A snap ring 81 is arranged on the circumferential surface of the auxiliary valve core 8, and the snap ring 81 is clamped on the connecting protrusion 71 to realize the assembly of the auxiliary check valve device e inside the electrical equipment. In other embodiments, the auxiliary valve core 8 can also be arranged at one end where the auxiliary pipeline 7 is connected to the output end of the drainage pump, and no limitation is made here.

[0140] This application can alleviate the technical problem in the related art that the valve core of the check valve is prone to deformation, resulting in partial failure and seal failure, so as to improve the sealing performance of the intelligent device and has good practicability.

[0141] In this application, unless otherwise clearly specified and limited, the first feature being "on" or "under" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature has a higher horizontal height than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the first feature has a lower horizontal height than the second feature.

[0142] In the description of this application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to this application.

[0143] In this application, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific situations.

[0144] In addition, in this application, descriptions such as "first" and "second" are for descriptive purposes only, and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more features. In the description of this application, "a plurality of" means two or more, unless otherwise specifically defined.

[0145] Although the embodiments of this application have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of this application. The scope of this application is defined by the claims and their equivalents.

Claims

1. A check valve, characterized in that: The check valve comprises: A valve seat is provided with a communication port; A valve core is disposed in the valve seat, and the valve core has a sealing head that can reciprocate to open and close the communication port; A support member is rotatably connected to the valve seat, and the support member is provided with a support portion, and the support portion is connected to the valve core so that the sealing head is tightly pressed against the communication port.

2. The check valve according to claim 1, characterized in that: The valve seat is provided with a valve cavity and a valve cover, the communication port is provided at one end of the valve cavity, the valve cover is provided at the other end of the valve cavity, the valve core is provided in the valve cavity, and the valve core comprises: A core body connected in the valve cavity, the sealing head is arranged on the head of the core body, and at least a part of the sealing head is elastic; A pull rod, one end of which is connected to the sealing head, and the other end of which can be movably extended out of the valve seat and connected to the supporting part; A first reset member has one end connected to the sealing head or the pull rod and the other end connected to the valve cover.

3. The check valve according to claim 2, characterized in that: One end of the pull rod is plugged into the back of the sealing head.

4. The check valve according to claim 3, characterized in that: A first protrusion is provided at one end of the pull rod, and the first protrusion is provided in the sealing head; A second protrusion is arranged on the circumference of the pull rod, and the second protrusion can be pressed against the back of the sealing head.

5. The check valve according to any one of claims 2 to 4, characterized in that: Under the condition that one end of the first reset member is connected to the pull rod, a third protrusion is arranged on the circumferential surface of the pull rod, and the first reset member is arranged between the third protrusion and the valve cover.

6. The check valve according to any one of claims 2 to 4, characterized in that: The valve cover is provided with a clamping portion, the clamping portion gap is arranged in the valve cavity, and the back of the core body is clamped between the clamping portion and the valve seat.

7. The check valve according to claim 6, characterized in that: A sealing protrusion is arranged on the outer side and / or the inner side of the peripheral surface of the back of the core.

8. The check valve according to any one of claims 2 to 4 and 7, characterized in that: The other end of the pull rod is inserted into the supporting part.

9. The check valve according to any one of claims 1 to 4 and 7, characterized in that: The check valve further comprises: A driving member is connected to the valve seat, and the driving member has a retractable output end. The retractable end of the driving member is connected to the supporting member to drive the supporting member to rotate.

10. The check valve according to claim 9, characterized in that The check valve further comprises: The bracket is connected to the valve seat, and the support member has a connecting portion, which is rotatably connected to the bracket.

11. The check valve according to claim 10, characterized in that The support member is provided with a driving part, the driving part is provided between the support member and the connecting part, and the driving part is connected to an output end of the driving member.

12. The check valve according to claim 10, characterized in that The driving member comprises: A driving housing, disposed between the bracket and the valve seat; A telescopic body, disposed in the driving housing, the telescopic body having a telescopic end that reciprocates along a straight line; A push rod connected to the telescopic end of the telescopic body, the push rod can extend out of the drive housing, and the push rod is configured as an output end of the drive member; The second restoring member is connected between the telescopic end of the telescopic body and the driving housing.

13. The check valve according to claim 12, characterized in that A guide block is arranged between the push rod and the telescopic end of the telescopic body, and the guide block is arranged in the driving housing in a sliding manner.

14. The check valve according to claim 12, characterized in that: The telescopic body is a wax motor.

15. The check valve according to claim 12, characterized in that The bracket includes a supporting shell, a side wall of the supporting shell is provided with a mounting groove, and a hanging ear is provided on the driving shell. The hanging ear and the mounting groove are correspondingly arranged, and the hanging ear is hung in the corresponding mounting groove so that the driving shell is assembled on the supporting shell.

16. The check valve according to claim 10, characterized in that The side of the support member is provided with a slide groove, the slide groove has a first end and a second end, and the first end of the slide groove is communicated with the second end of the slide groove; The check valve also includes a retaining member, which is rotatably connected to the valve seat. The retaining member has a retaining portion, and the retaining portion can be movably connected to the slide groove along a set direction. When the driving member drives the support member to rotate on the bracket, the retaining portion can be retained in the slide groove.

17. The check valve according to claim 16, characterized in that The depth of the first end of the slide groove is smaller than the depth of the second end of the slide groove.

18. The check valve according to claim 16 or 17, characterized in that: An arc-shaped retaining section is arranged in the middle of the slide slot, and the retaining section is arranged below the first end of the slide slot. The center of the retaining section is arranged below the retaining section. When the driving member drives the supporting member to rotate on the bracket, the retaining portion can be retained at the top of the retaining section.

19. The check valve according to claim 18, characterized in that The chute also includes: a first tank body, a top end of which is configured as the first end; The second slot body has one end connected to the bottom end of the first slot body and the other end connected to one end of the retaining section. The height of the other end of the second trough body is higher than the height of one end of the second trough body; The third slot body has a bottom end connected to the other end of the retaining section and a top end configured as the second end.

20. The check valve according to claim 19, characterized in that The depth of the bottom end of the first groove body is greater than the depth of one end of the second groove body, the depth of the other end of the second groove body is greater than the depth of one end of the retaining section, and the depth of the other end of the retaining section is greater than the depth of the bottom end of the third groove body.

21. The check valve according to claim 20, characterized in that The first groove body, the second groove body, the retaining section and the groove bottoms of the third groove body are planes parallel to each other.

22. The check valve according to claim 21, characterized in that The depth of the slide groove decreases from the first end to the second end.

23. The check valve according to any one of claims 16, 17 and 19-22, characterized in that: The check valve further comprises a retaining frame, the retaining frame is arranged on at least one side of the support member, and the slide groove is arranged on the retaining frame.

24. The check valve according to any one of claims 16, 17 and 19-22, characterized in that: The retaining member includes a first connecting rod, a second connecting rod and a third connecting rod, the first connecting rod is rotatably connected to the valve seat, the third connecting rod is connected to the first connecting rod through the second connecting rod, and the third connecting rod is configured as the retaining portion.

25. The check valve according to claim 24, characterized in that Slide grooves are arranged on both sides of the support member, and two third connecting rods are arranged opposite to each other. The two third connecting rods are slidably connected to the corresponding slide grooves.

26. The check valve according to claim 25, characterized in that A rotation groove is provided on the top of the valve seat, and the first connecting rod is rotatably connected to the rotation groove; A limit seat is arranged on the driving member, at least a part of the limit seat is arranged on the rotating groove, and a guide part for the third connecting rod to movably pass through is arranged on the limit seat.

27. A non-return device, characterized in that: The non-return device comprises: A pipe having a water inlet end and a water outlet end; The check valve according to any one of claims 1 to 26, wherein the connecting port of the check valve can connect the water inlet end and the water outlet end.

28. The non-return device according to claim 27, characterized in that: The angle between the center line of the communication port and the center line of the water inlet end is an obtuse angle.

29. An electrical device, characterized in that: The electrical equipment includes the non-return device according to claim 27 or 28.

30. The electrical device according to claim 29, characterized in that: The electrical equipment includes: container, A drainage pump has an input end connected to the container and an output end connected to the water inlet end of the check device.

31. The electrical device according to claim 30, characterized in that: The electrical equipment also includes: The auxiliary non-return device comprises an auxiliary pipeline and an auxiliary valve core. The auxiliary pipeline is connected between the output end of the drainage pump and the water inlet end of the non-return device. The auxiliary valve core is openably arranged on the auxiliary pipeline.

32. The electrical device according to claim 31, characterized in that: The end of the auxiliary pipeline is provided with a connecting protrusion, and the auxiliary valve core is clamped on the connecting protrusion.

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