Check valve, check device and electrical equipment

Abstract

The invention 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] The present application belongs to the technical field of electrical equipment, and specifically relates to a check valve, a check device and electrical equipment. Background Art

[0002] Electrical appliances are currently widely used in daily life, especially in the kitchen and bathroom fields. Dishwashers, water purifiers, washing machines, water heaters, etc. are widely used. Water basically flows through the above electrical appliances. Especially after the water is treated by the above electrical appliances and discharged to the outside of the electrical appliances, a check valve needs to be installed to prevent the discharged water from flowing back into the electrical appliances and affecting the operation of the electrical appliances.

[0003] In the related art, after long-term use, the check valve may have an unreliable sealing problem, which reduces the sealing performance of the check valve. Summary of the Invention

[0004] The present application provides a check valve, a check device and an electrical device, which aim to at least to some extent solve the technical problem of unreliable sealing of the check valve after long-term use, so as to improve the sealing performance of the check valve.

[0005] In a first aspect of the present application, the present application provides a check valve, which includes: a valve seat provided with a connecting port; a valve core provided in the valve seat, the valve core having a sealing head that can move back and forth to open and close the connecting port; a support member rotatably connected to the valve seat, the support member being provided with a supporting portion, the supporting portion being connected to the valve core so that the sealing head is pressed against the connecting port.

[0006] The check valve provided in the present application has a valve seat provided with a connecting port, a valve core provided in the valve seat, and a sealing head that can move back and forth to open and close the connecting port, thereby opening and closing the corresponding pipeline to realize the check function. Since the support member is rotatably connected to the valve seat, when the connecting port is open, the valve core drives the support member to rotate. When the connecting port is closed, the supporting part of the support member limits the movement of the sealing head in the valve seat, so that the sealing head is pressed against the connecting port, thereby improving the sealing reliability and sealing effect of the sealing head, and has good practicality.

[0007] In some embodiments, 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, and the valve core is provided in the valve cavity, the valve core comprising: a core body connected in the valve cavity, a sealing head provided 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 movable out of the valve seat and connected to the support portion; and a first return member having one end connected to the sealing head or the pull rod and the other end connected to the valve cover. When the communication port is open, the pull rod and the sealing head move away from the communication port, the pull rod drives the support portion of the support member to rotate, and at the same time, the first return member deforms. When the communication port is closed, the first return member recovers its 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 support member to rotate to an initial position, and the support portion of the support member restricts the movement of the sealing head in the valve seat, thereby improving the sealing reliability and sealing effect of the sealing head.

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

[0009] In some embodiments, 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 provided around the pull rod, and the second protrusion can be abutted against the back of the sealing head to further improve the reliability of the connection between the pull rod and the sealing head.

[0010] In some embodiments, under the condition that one end of the first restoring member is connected to the pull rod, a third protrusion is provided on the circumference of the pull rod, and the first restoring member is provided between the third protrusion and the valve cover.

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

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

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

[0014] In some embodiments, the check valve further includes: a driving member connected to the valve seat, the driving member having a retractable output end, the retractable end of the driving member being connected to the support member to drive the support member to rotate on the bracket to assist in opening the connecting port.

[0015] In some embodiments, the check valve further comprises: a bracket connected to the valve seat, the support member has a connecting portion, the connecting portion is rotatably connected to the bracket, and the support member can swing back and forth around its connecting portion.

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

[0017] In some embodiments, the driving member includes: a driving housing, which is arranged between the bracket and the valve seat; a telescopic body, which is arranged in the driving housing, and the telescopic body has a telescopic end that moves back and forth in a straight line; a push rod, which is connected to the telescopic end of the telescopic body, and the push rod can extend out of the driving housing, and the push rod is configured as the output end of the driving member; a second reset member, which is connected between the telescopic end of the telescopic body and the driving housing. When the connecting port is open, the telescopic end of the telescopic body extends, driving the support member to rotate, thereby driving the pull rod and the sealing head to move in a direction away from the connecting port to open the connecting port, and at the same time, the second reset member deforms; when the connecting port is closed, the second reset member resumes its deformation, forcing the telescopic end of the telescopic body to return to its original position, driving the support member to rotate to its initial position, thereby driving the pull rod and the sealing head to move in a direction close to the connecting port to close the connecting port.

[0018] In some embodiments, a guide block is provided between the push rod and the telescopic end of the telescopic body, and the guide block is slidably provided in the drive 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 slide groove is provided on the side of the support member, the slide groove has a first end and a second end, and the first end of the slide groove and the second end of the slide groove are communicated with each other; the check valve also includes a retaining member, the retaining member 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. In the process of the driving member driving the support member to rotate on the bracket, the retaining portion can be retained in the slide groove, so that the driving member can stop working when the connecting port is open, thereby reducing energy loss.

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

[0022] In some embodiments, an arc-shaped retaining segment is provided in the middle of the slide, the retaining segment is provided below the first end of the slide, and the center of the retaining segment is provided below the retaining segment. When the driving member drives the support member to rotate on the bracket, the retaining portion can be retained at the top of the retaining segment.

[0023] In some embodiments, the slide trough also includes: a first trough body, the top end of which is configured as the first end; a second trough body, one end of which is connected to the bottom end of the first trough body, and the other end of which is connected to one end of the retaining section, and the height of the other end of the second trough body is higher than the height of one end of the second trough body; a third trough body, the bottom end of which is connected to the other end of the retaining 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 trough body is greater than the depth of one end of the second trough body, the depth of the other end of the second trough body is greater than the depth of one end of the retaining segment, and the depth of the other end of the retaining segment is greater than the depth of the bottom end of the third trough body.

[0025] In some embodiments, the bottoms of the first trough body, the second trough body, the retaining section, and the third trough body are parallel planes.

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

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

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

[0029] In some embodiments, sliding grooves are provided on both sides of the support member, and two third connecting rods are provided opposite to each other, and the two third connecting rods are slidably connected to the corresponding sliding grooves.

[0030] In some embodiments, 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 provided on the driving member, at least a portion of the limit seat is provided on the rotation groove, and a guide portion for the third connecting rod to move through is provided on the limit seat.

[0031] In some embodiments, a mounting groove is provided on the side wall of the support shell, and a hanging ear is provided on the drive shell. The hanging ear and the mounting groove are provided correspondingly, and the hanging ear is hung in the corresponding mounting groove so that the drive shell is assembled on the support shell.

[0032] In a second aspect of the present application, a check device is provided, comprising: a pipeline having a water inlet end and a water outlet end; the above-mentioned check valve, wherein the connecting port of the check valve can connect the water inlet end and the water outlet end.

[0033] The non-return device provided in the present application can improve the sealing reliability and sealing effect of the sealing head and has good practicality.

[0034] In some embodiments, the 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 non-return device.

[0036] The electrical equipment provided with the non-return device can improve the sealing reliability and sealing effect of the sealing head and has good practicality.

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

[0038] In some embodiments, the electrical equipment also includes: an auxiliary check device e, including an auxiliary pipe and an auxiliary valve core, the auxiliary pipe is connected between the output end of the drainage pump and the water inlet end of the check device, and the auxiliary valve core is openably arranged on the auxiliary pipe.

[0039] In some embodiments, a connecting protrusion is provided at the end of the auxiliary pipe, and the auxiliary valve core is clamped 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 briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0041] Figure 1 A schematic structural diagram of a non-return device in one or more embodiments of the present application is shown;

[0042] Figure 2 Shown Figure 1Schematic top view of

[0043] Figure 3 Shown Figure 1 AA cross-sectional view of ;

[0044] Figure 4 Shown Figure 2 BB cross-sectional diagram;

[0045] Figure 5 Shown Figure 1 Explosion diagram of

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

[0047] Figure 7 Shown Figure 6 A structural diagram from another perspective;

[0048] Figure 8 Shown Figure 6 Schematic cross-sectional view of ;

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

[0050] Figure 10 Shown Figure 9 Schematic cross-sectional view of ;

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

[0052] Figure 12 Shown Figure 1 A schematic structural diagram of a support member;

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

[0054] Figure 14 Shown Figure 1 A schematic diagram of the structure of the driving member in FIG.

[0055] Figure 15 Shown Figure 14 Schematic cross-sectional view of ;

[0056] Figure 16 A schematic structural diagram of a backflow prevention device having a retaining frame and a retaining member is shown;

[0057] Figure 17 Shown Figure 16 Schematic cross-sectional view of ;

[0058] Figure 18 Shown Figure 16 A schematic diagram of the structure of the support member;

[0059] Figure 19 Shown Figure 18 A structural diagram from another perspective;

[0060] Figure 20 Shown Figure 16 A schematic structural diagram of a retaining member;

[0061] Figure 21 Shown Figure 16 Schematic diagram of the structure of the valve cover;

[0062] Figure 22 Shown Figure 16 Schematic diagram of the structure of the bracket;

[0063] Figure 23 Shown Figure 16 A schematic diagram of the structure of a non-return device with a detection switch;

[0064] Figure 24 A schematic diagram showing the structure of an electrical device in one or more embodiments of the application is shown;

[0065] Figure 25 Shown Figure 24 Schematic cross-sectional view of ;

[0066] Figure 26 Shown Figure 24 A schematic structural diagram of the auxiliary check device in FIG.

[0067] Figure 27 Shown Figure 26 Assembly diagram of the auxiliary check device.

[0068] Description of reference numerals:

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

[0070] Check valve-b;

[0071] Valve seat 1, communication port 11, valve chamber 12, valve cover 13, clamping portion 131, first connecting plate 14, rotation 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, limiting 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 slot 421, second connecting plate 422, cantilever 43, detection switch 44, limit seat 45, guide portion 46;

[0075] Driving member 5, driving housing 51, telescopic body 52, ejector rod 53, second reset member 54, guide block 55, and mounting lug 56;

[0076] Assembly cavity-6;

[0077] container-c;

[0078] Drain pump-d;

[0079] Auxiliary check device-e;

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

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

[0082] Cage 9, slide 91, first groove 911, second groove 912, retaining section 913, third groove 914, first step 915, second step 916, third step 917, fourth step 918;

[0083] Retaining member-10, first connecting rod-101, second connecting rod-102, third connecting rod-103. DETAILED DESCRIPTION

[0084] In order to enable those skilled in the art 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 drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of this application.

[0085] In related art, a check device includes a pipe with an inlet and an outlet, and a check valve. The pipe has a water inlet and a water outlet. The check valve is mounted on the pipe and has a connecting port that connects the inlet and the outlet. When draining an electrical device, the connecting port of the check valve opens, allowing water to flow through the check device to the drain pipe. After draining is complete, the connecting port of the check valve closes to prevent any residual water in the drain pipe from flowing back.

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

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

[0088] Figure 1 Schematic diagram showing the structure of the non-return device in one or more embodiments of the present application, Figure 2 Shown Figure 1 A top-down diagram of Figure 3 Shown Figure 1 AA cross-sectional view of Figure 4 Shown Figure 2 BB cross-sectional view. Figures 1-4 , consistent with the relevant technology, the check device provided in this application also includes a pipe a and a check valve b, the pipe a has a water inlet end a1 and a water outlet end a2, the check valve b is arranged on the pipe a, and the check valve b is provided with a connecting port 11, which can connect the water inlet end a1 and the water outlet end a2.

[0089] Figure 5 Shown Figure 1 Explosion diagram, combined with Figure 1-Figure 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 sealing head 22 that can move back and forth 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 supporting portion 31. The supporting 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 is tightly pressed against the communication port 11.

[0090] The check valve b provided in the present application has a valve seat 1 provided with a connecting port 11, a valve core 2 provided in the valve seat 1, and a sealing head 22 that can move back and forth to open and close the connecting port 11, thereby opening and closing the corresponding pipeline a to realize a check function. Since the support member 3 is rotatably connected to the valve seat 1, when the connecting port 11 is open, the valve core 2 drives the support member 3 to rotate. When the connecting 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 is pressed against the connecting port 11, so as to improve the sealing reliability and sealing effect of the sealing head 22, and has good practicality.

[0091] Figure 6 Shown Figure 1Schematic diagram of the assembly structure of the valve seat on the pipeline, Figure 7 Shown Figure 6 A structural diagram from another perspective, Figure 8 Shown Figure 6 Schematic cross-section of the . 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 Shown Figure 1 The structural diagram of the valve core in Figure 10 Shown Figure 9 Combined with the diagram Figure 3-Figure 5 as well as Figure 9-10 In some embodiments, the valve core 2 is arranged in the valve cavity 12, and 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 the sealing head 22 is arranged on the head of the core body 21. At least part of the sealing head 22 is elastic; one end of the pull rod 23 is connected to the sealing head 22, and the other end of the pull rod 23 can be movably extended from the valve seat 1 and connected to the support part 31. 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. When the connecting port 11 is open, the pull rod 23 and the sealing head 22 move away from the connecting port 11, and the pull rod 23 drives the supporting portion 31 of the support member 3 to rotate, and at the same time, the first reset member 24 is deformed; when the connecting port 11 is closed, the first reset member 24 resumes its deformation, forcing the pull rod 23 and the sealing head 22 to move toward the connecting port 11 to close the connecting port 11. At the same time, the pull rod 23 drives the support member 3 to rotate to the initial position, and the supporting portion 31 of the support member 3 limits 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] Combine Figure 4 as well as Figure 8In some embodiments, the angle between the center line of the connecting port 11 and the center line of the water inlet end a1 is an obtuse angle. When the electrical equipment is draining, water flows in from the water inlet end a1 of the check device. Since the angle between the center line of the connecting port 11 and the center line of the water inlet end a1 is an obtuse angle, the water flows into the sealing head 22 of the valve core 2, forcing the pull rod 23 and the sealing head 22 to move away from the connecting port 11. The pull rod 23 drives the supporting portion 31 of the support member 3 to rotate the support member 3. At the same time, the first reset member 24 is deformed; when the electrical equipment finishes draining, the water stops flowing into the water inlet end a1 of the check device, and the first reset member 24 recovers its deformation, forcing the pull rod 23 and the sealing head 22 to move toward the connecting port 11 to close the connecting port 11. At the same time, the pull rod 23 drives the support member 3 to rotate to the initial position. The support portion 31 of the support member 3 limits 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 device can be coaxially arranged or arranged at a certain angle, which is not limited here.

[0095] Combine Figure 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 21 is axially penetrated, the sealing head 22 is connected to its front end, and the rear end of the core 21 can be connected to the valve seat 1.

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

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

[0098] Combine Figure 9-10 In a specific implementation, the clamping portion 131 can be a clamping protrusion provided on the side of the valve cover 13 facing the valve cavity 12. The clamping protrusion is roughly cylindrical, and the back of the core 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 inner side of the circumference of the back of the core body 21 to increase the cross-sectional size of the back of the core body 21 to improve the reliability of the connection of the valve core 2 in the valve seat 1.

[0100] Combine Figure 3 as well as Figure 4 In some embodiments, one end of the pull rod 23 can be plugged into the back of the sealing head 22 to achieve the connection between the pull rod 23 and the sealing head 22.

[0101] Figure 11 Shown Figure 1 The structural diagram of the pull rod in Figure 3-Figure 5 as well as Figures 9-11 In some embodiments, a first protrusion 231 may be provided at one end of the tie rod 23. The first protrusion 231 is disposed within the sealing head 22 to achieve connection between the sealing head 22 and the tie rod 23. Furthermore, a second protrusion 232 is provided around the tie rod 23, and the second protrusion 232 can abut against the back of the sealing head 22. When the communication port 11 is open, a certain gap exists between the second protrusion 232 and the sealing head 22. When the communication port 11 is closed, the second protrusion 232 abuts against the back of the sealing head 22, thereby increasing the area of ​​the tie rod 23 pushing the sealing head 22, thereby further improving the reliability of the connection between the tie rod 23 and the sealing head 22.

[0102] Combine Figure 3-Figure 5 as well as Figures 9-11 In some embodiments, when one end of the first return member 24 is connected to the tie rod 23, a third protrusion 233 may be provided on the circumferential surface of the tie rod 23, and the first return member 24 may be disposed between the third protrusion 233 and the valve cover 13. A plurality of limiting posts 234 may be spaced apart on the circumferential surface of the third protrusion 233 facing the valve cover 13. The first return member 24 may be elastic and fit over the tie rod 23. The end of the first return member 24 connected to the third protrusion 233 may be disposed between the plurality of limiting posts 234 and the tie rod 23 to improve the reliability of the connection between the first return member 24 and the tie rod 23.

[0103] Combine Figure 3-Figure 5 as well as Figure 11 In some embodiments, the other end of the pull rod 23 can be inserted into the support portion 31. In a specific implementation, 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] Combine Figure 11The 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, etc., which is not shown here.

[0105] Figure 12 Shown Figure 1 Schematic diagram of the support structure, combined with Figure 1-Figure 5 as well as Figure 12 In some embodiments, the check valve b may further include a bracket 4 connected to the valve seat 1. The support member 3 has a connecting portion 32 rotatably connected to the bracket 4, and the support member 3 can swing back and forth about its connecting portion 32. When the communication port 11 is open, the valve core 2 drives the support member 3 to rotate about the connecting portion 32. When the communication port 11 is closed, the valve core 2 drives the support member 3 to rotate in the opposite direction about the connecting portion 32, so that the support portion 31 of the support member 3 restricts the movement of the sealing head 22 within the valve seat 1, thereby improving the sealing reliability and sealing effect of the sealing head 22.

[0106] Figure 13 Shown Figure 1 Schematic diagram of the structure of the bracket, combined with Figure 2 、 Figure 3 、 Figure 5 、 Figure 12 as well as Figure 13 In a 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, which 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 to realize the rotatable setting of the support member 3 on the bracket 4.

[0107] Combine Figure 5 as well as Figure 13 In some embodiments, the bracket 4 includes a support shell 42, the side of the support shell 42 facing the valve seat 1 is open, the support shell 42 is connected to the valve seat 1, and the support shell 42 and the valve seat 1 form an assembly cavity 6.

[0108] Combine Figure 5 as well as Figure 13 In a specific implementation, more than two first connecting plates 14 are provided on the outer circumferential surface of the valve seat 1, and a second connecting plate 422 is provided on the outer circumferential surface of the support shell 42. The second connecting plates 422 and the first connecting plates 14 are provided correspondingly. The second connecting plates 422 and the corresponding first connecting plates 14 are assembled by bolts and other connecting parts to realize the assembly of the support shell 42 on the valve seat 1, and the support block 41 can be connected to the top of the support shell 42 through the cantilever 43.

[0109] Combine Figure 2 、 Figure 3 as well as Figure 5 Since the pull rod 23 on the valve core 2 is pressed and limited by the support portion 31 of the support member 3 when the connecting port 11 is closed, when the connecting port 11 needs to be opened, the impact force of the flowing water may not force the pull rod 23 and the sealing head 22 to move toward the support member 3, so that the support member 3 can rotate and the connecting port 11 can be opened smoothly. 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 in rotating so that the connecting port 11 can be opened smoothly.

[0110] Combine Figure 2 、 Figure 3 as well as Figure 5 In some embodiments, the check valve b further includes a driving member 5 , which is connected to the valve seat 1 . The driving member 5 has a retractable output end, and 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 is draining, water flows in from the water inlet end a1 of the check device. Since the angle between the center line of the connecting port 11 and the center line of the water inlet end a1 is an obtuse angle, the water flows into the sealing head 22 of the valve core 2, forcing the pull rod 23 and the sealing head 22 to move away from the connecting port 11. The pull rod 23 drives the support part 31 of the support member 3. At the same time, the output end of the control drive 5 is extended, and the pull rod 23 and the drive member 5 jointly drive the support member 3 to rotate so that the connecting port 11 is smoothly opened. During the opening process of the connecting port 11, the first reset member 24 is deformed; when the electrical equipment finishes draining, the water stops flowing into the water inlet end a1 of the check device, and the first reset member 24 recovers its deformation, forcing the pull rod 23 and the sealing head 22 to move toward the connecting port 11. At the same time, the output end of the control drive 5 is retracted, and the pull rod 23 and the drive member 5 jointly drive the support member 3 to rotate so that the support part 31 of the support member 3 limits the movement of the sealing head 22 in the valve seat 1, so as to improve the sealing reliability and sealing effect of the sealing head 22.

[0111] Combine Figure 12 In some embodiments, the support member 3 may be provided with a driving portion 33 disposed between the support portion 31 and the connecting portion 32. The driving portion 33 may be a driving protrusion disposed 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 space occupied by the check valve b. In other embodiments, the support portion 31 is disposed between the driving portion and the connecting portion 32, which is not a limitation here.

[0112] Figure 14 Shown Figure 1 The schematic diagram of the driving parts in FIG. Figure 15 Shown Figure 14 Schematic cross-section of the . Figure 2 、 Figure 3 、 Figure 5 as well as Figure 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, wherein the driving housing 51 is arranged in the assembly cavity 6 formed between the support housing 42 of the bracket 4 and the valve seat 1, the telescopic body 52 is arranged in the driving housing 51, the telescopic body 52 has a telescopic end that moves back and forth along a straight line, 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, and 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. When the connecting port 11 is open, the telescopic end of the telescopic body 52 extends, driving the support member 3 to rotate, thereby driving the pull rod 23 and the sealing head 22 to move away from the connecting port 11 to open the connecting port 11. At the same time, the second reset member 54 is deformed; when the connecting port 11 is closed, the second reset member 54 resumes its deformation, forcing the telescopic end of the telescopic body 52 to return to its position, driving the support member 3 to rotate to its initial position, thereby driving the pull rod 23 and the sealing head 22 to move toward the connecting port 11 to close the connecting port 11.

[0113] Combine Figure 2 、 Figure 3 as well as 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 within the drive housing 51 to guide the movement of the push rod 53. In a specific implementation, the telescopic end of the telescopic body 52 may be connected to one side of the guide block 55 via a threaded or keyed connection, and the push rod 53 may be connected to the other side of the guide block 55 via a threaded or keyed connection. The second return member 54 may be a spring that is sleeved on the push rod 53, and its ends may be disposed on the guide block 55 and the inner wall of the drive housing 51, respectively, without limitation herein.

[0114] In some embodiments, the telescopic body 52 may be a wax motor. A wax motor uses the expansion of wax due to heat to drive the telescopic end to extend and retract. When the wax motor is not energized, the second reset member 54 presses the push rod 53 against the guide block 55. When the wax motor is energized, the wax in the wax motor expands due to heat, driving the telescopic end to extend, thereby driving the push rod 53 to overcome the pressure of the second reset member 54 and move outward. 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 connecting port 11 to open the connecting port 11. The wax motor only has the extension function, so its cost is relatively low. Accordingly, the return of the telescopic end of the wax motor requires the deformation recovery force of the second reset member 54.

[0115] Combine Figure 5 as well as Figure 13-15In some embodiments, a mounting groove 421 is provided on the side wall of the support housing 42, and a hanging ear 56 is provided on the drive housing 5. The hanging ear 56 and the mounting groove 421 are provided correspondingly, and the hanging ear 56 is hung in the corresponding mounting groove 421, so that the drive housing 5 is assembled in the support housing 42. In a specific implementation, two mounting grooves 421 can be provided opposite each other, and one side of the side wall of the mounting groove 421 is open. Accordingly, two hanging ears 56 are also provided. The two hanging ears 56 can be pushed through the open mounting groove 421 to push the hanging ears 56 into the corresponding mounting groove 421. 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, reliable, and has good practicality.

[0116] In some embodiments, the output end of the driver 5 can be connected to the driving portion of the support member 3. For example, the output end of the driver 5 can be connected to the driving portion of the support member 3 by plugging, screwing, or keying. The extension and retraction of the output end of the driver 5 drives the rotation of the support member 3. When the connecting port 11 is closed, since the output end of the driver 5 is connected to the driving portion of the support member 3, the sealing reliability of the sealing head 22 assembled in the connecting port 11 can be further improved. In other embodiments, the output end of the driver 5 can also be set separately from the driving portion of the support member 3. When the connecting port 11 is open, the extension end of the driver 5 presses against the support portion 31 of the support member 3 to drive the support member 3 to rotate, thereby assisting in opening the connecting port 11. When the connecting port 11 is closed, the extension end of the driver 5 returns to its original position, and the support member 3 rotates to its initial position under the action of the first reset member 24 to limit the push rod 53 and the sealing head 22.

[0117] It should be noted that the driving member 5 may also be a linear reciprocating mechanism, such as a linear motor, a linear guide rail, etc., which is not limited here.

[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 practicality.

[0119] In the above embodiment, when the connecting port is open, that is, the check valve is open, the driving member 5 needs to keep working. If the check valve is open for a long time, the driving member 5 needs to consume more energy, which affects the cost of use and there is room for improvement.

[0120] Figure 16 The figure shows a schematic structural diagram of a non-return device having a retaining frame and a retaining member. Figure 17 Shown Figure 16 Schematic cross-section diagram, combined with Figure 16-17Based on the above technical problems, the side of the support member 3 of the check valve b provided in the present application can be provided with a slide groove 91, the slide groove 91 has a first end and a second end, and the first end of the slide groove 91 and the second end of the slide groove 91 are connected; the check valve can also include a retaining member 10, which is rotatably connected to the valve seat 1, and the retaining member 10 has a retaining portion 104, and the retaining portion 104 can be movably connected to the slide groove 91 along a set direction. In the process of the driving member 5 driving the support member 3 to rotate on the bracket, the retaining portion 104 can be retained in the slide groove 91.

[0121] The check valve with a retaining member 10, when the communicating port 11 is open, the driving member 5 drives the supporting member 3 to rotate around its connecting portion to open the communicating port 11, so that the check valve opens. At the same time, the retaining portion 104 of the retaining member 10 is driven to slide in the slide groove 91 along the set direction until the retaining portion 104 of the retaining member 10 remains in the slide groove 91. The driving member 5 is controlled to stop working, and the retaining portion 104 of the retaining member 10 maintains support for the above-mentioned supporting member 3, so that the check valve remains open, thereby reducing energy loss, and has good practicality.

[0122] Figure 18 Shown Figure 16 A schematic structural diagram of the support member 3 in FIG. Figure 19 Shown Figure 18 Another structural diagram of the perspective. Figure 18 as well as Figure 19 In some embodiments, the depth of the first end of the slide groove 91 is less than the depth of the second end of the slide groove 91, so that the first end of the slide groove 91 and the second end of the slide groove 91 form a first step 915, so that the retaining portion 104 of the retaining member 10 can only be movably connected in the slide groove 91 along a set direction.

[0123] Combine Figure 18 as well as Figure 19 In some embodiments, an arc-shaped retaining segment 913 is provided in the middle of the chute 91. The retaining segment 913 is provided below the first end of the chute 91, and the center of the retaining segment 913 is provided below the retaining segment 913. When the driving member 5 drives the support member 3 to rotate on the bracket 4, the retaining portion 104 can be retained at the top of the retaining segment 913. In a specific implementation, the top of the retaining segment 913 is located in the middle, and the two ends of the retaining segment 913 are the bottoms of the retaining segment 913.

[0124] Combine Figure 18 as well as Figure 19In some embodiments, the slide 91 may further include a first trough body 911, a second trough body 912 and a third trough body 914, wherein the top of the first trough body 911 is configured as the first end, one end of the second trough body 912 is connected to the bottom end of the first trough body 911, the other end of the second trough body 912 is connected to one end of the retaining section 913, the height of the other end of the second trough body 912 is higher than the height of one end of the second trough body 912, the bottom end of the third trough body 914 is connected to the other end of the retaining section 913, and the top of the third trough body 914 is configured as the second end. When the driving member 5 is not working, the holding portion 104 of the holding member 10 is located at the top of the first groove 911 (that is, the first end of the slide groove 91). When the driving member 5 is working, since the depth of the first end of the slide groove 91 is less than the depth of the second end of the slide groove 91, the holding portion 104 of the holding member 10 can only slide in the first groove 911 toward the bottom of the first groove 911 until it slides to the bottom of the first groove 911. At this time, the driving member 5 stops working, and under the action of the gravity of the support member 3, the holding portion 104 of the holding member 10 slides from the bottom of the first groove 911 to the second groove 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 maintained in the slide groove 91, and the above-mentioned support member 3 is supported by the holding portion 104 of the holding member 10. , so that the check valve remains open, and at the same time, the driving member 5 can stop working to reduce energy loss; when the check valve needs to be closed, the driving member 5 is extended again, so that the support member 3 continues to rotate in the direction away from the driving member 5, and the retaining portion 104 of the retaining member 10 moves in the retaining section 913 toward the other end of the retaining section 913 until it enters the bottom of the third groove 914. At this time, the driving member 5 is controlled to stop working, and under the action of the second reset member restoring the deformation, the support member 3 is driven to rotate in the opposite direction to close the connecting port 11, so that the check valve is in a closed state. At the same time, the retaining portion 104 of the retaining member 10 is also driven to slide in the third groove 914 from the bottom of the third groove 914 to the top of the third groove 914 (i.e. the second end of the slide groove 91) and the top of the first groove 911 (i.e. the first end of the slide groove 91) in sequence, so that the retaining portion 104 of the retaining member 10 rotates in the slide groove 91 along the set direction.

[0125] Combine Figure 18 as well as Figure 19In some embodiments, to ensure that the retaining portion 104 of the retaining member 10 can rotate within the chute 91 along a set direction, the depth of the bottom end of the first groove 911 is greater than the depth of one end of the second groove 912, thereby forming a second step 916. The depth of the other end of the second groove 912 is greater than the depth of one end of the retaining segment 913, thereby forming a third step 917. The depth of the other end of the retaining segment 913 is greater than the depth of the bottom end of the third groove 914, thereby forming a fourth step 918. Under these conditions, the bottoms of the first groove 911, the second groove 912, the retaining segment 913, and the third groove 914 are parallel planes, thereby enabling the retaining portion 104 of the retaining member 10 to rotate within the chute 91 along a set direction.

[0126] In other embodiments, the depth of the slide groove 91 can be reduced successively from the first end to the second end, that is, the plane of the slide groove 91 extending from its first end toward the second end can also achieve the technical effect that the retaining portion 104 of the retaining member 10 can rotate in the slide groove 91 along the set direction.

[0127] Combine Figure 16 as well as Figure 17 In some embodiments, the check valve b may further include a retainer 9, which is provided on at least one side of the support member 3, and a slide groove 91 is provided on the retainer 9. The retainer 10 may be integrally formed with the support member, and the top of the retainer 10 may protrude from the top of the support member 3 to enable the retaining portion 104 of the retainer 10 to rotate within the slide groove 91.

[0128] Figure 20 Shown Figure 16 Schematic diagram of the structure of the retaining member, combined with Figure 20 In some embodiments, the retaining 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 being rotatably connected to the valve seat, the third connecting rod 103 being connected to the first connecting rod 101 through the second connecting rod 102, and the third connecting rod 103 being configured as a retaining portion 104.

[0129] In specific implementation, a slide groove 91 can be set on both sides of the support member 3, and two third connecting rods 103 are relatively set. The two third connecting rods 103 can be slidably connected to the corresponding slide grooves 91 to maintain the support member 3 in a balanced state.

[0130] Figure 21 Shown Figure 16 The structural diagram of the valve cover, combined with Figure 16 、 Figure 17 as well as Figure 21 In some embodiments, a rotation groove 15 is provided on the top of the valve seat 1 (the valve cover 13), and the first connecting rod 101 is rotatably connected to the rotation groove 15; Figure 22Shown Figure 16 Schematic diagram of the structure of the bracket, combined with Figure 16 、 Figure 17 as well as Figure 22 A limit seat 45 can be provided on the bracket 4, and at least a portion of the limit seat 45 is provided on the rotation groove 15 to prevent the first connecting rod 101 from escaping from the rotation groove 15. At the same time, a guide portion 46 for the third connecting rod 103 to move through is provided on the limit seat 45. The guide portion 46 can be a hole-shaped or an inverted groove-shaped to provide guidance for the swing of the third connecting rod 103.

[0131] In a specific implementation, the limiting seat 45 can be integrally formed at the top of the bracket 4 and extend out of the side of the bracket 4 to be pressed against the rotation groove 15. In some embodiments, the limiting seat 45 can be provided corresponding to the third connecting rod 103, that is, each third connecting rod 103 passes through a corresponding limiting seat 45; in other embodiments, only one limiting seat 45 can be provided, and the limiting seat 45 can be provided with two guide portions 46, and each third connecting rod 103 passes through a corresponding guide portion 46, or the limiting seat 45 can be provided with a guide portion 46, and two third connecting rods 103 pass through the same guide portion 46, without limitation herein.

[0132] Figure 23 Shown Figure 16 Structural diagram of the anti-reverse device with a detection switch, combined with Figure 23 In addition, a detection switch 44 is provided on the bracket 4. When the check valve is in the closed state, the support member 3 contacts the detection switch 44 to confirm whether the support member 3 is rotated into place to confirm that the check valve is in the closed state.

[0133] Based on the above-mentioned non-return device, the present application also provides an electrical device, which includes the above-mentioned non-return device.

[0134] The electrical equipment provided with the non-return device can improve the sealing reliability and sealing effect of the sealing head 22 and has good practicality.

[0135] In some embodiments, the electrical appliance may be a dishwasher, a water purifier, a washing machine, a water heater, etc., without limitation. Taking a dishwasher as an example, the electrical appliance equipped with the aforementioned non-return device is further described.

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

[0137] Combine Figure 24 as well as Figure 25 In some embodiments, the electrical device may further include an auxiliary non-return device e. Figure 26 Shown Figure 24 The structural diagram of the auxiliary non-return device in Figure 27 Shown Figure 26 Assembly diagram of the auxiliary check device, combined with Figure 26 as well as Figure 27 The auxiliary check 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 device. The auxiliary valve core 8 is openably mounted on the auxiliary pipe 7. When draining the electrical equipment, the wax motor is pre-energized, connecting the water inlet end a1 and the water outlet end a2 of the check device. The drain pump is then activated, and water in the container impacts the auxiliary valve core 8. This opens the auxiliary pipe 7 of the auxiliary check device e, allowing water to flow through the auxiliary check device e and the check device into the drain pipe. After draining stops, the wax motor is de-energized. While the check device valve core resets, residual water in the drain pipe flows through the auxiliary check device e under the action of gravity. After flowing through the auxiliary check device e, it is blocked by the auxiliary valve core 8 of the auxiliary check device e. After the check device valve core resets, the water inlet end a1 and the water outlet end a2 of the check device are disconnected. This means that the auxiliary check device e utilizes the elasticity of the auxiliary valve core 8 to seal the pipe, which results in rapid operation but is prone to leakage. Check valve b has good sealing stability, but due to the working characteristics of the wax motor, its movement is slow. This application uses a combination of two check valves to prevent residual water in the drainage pipe from flowing back into the container, which has good practicality.

[0138] Combine Figure 26 as well as Figure 27 In some embodiments, the end of the auxiliary pipe 7 may be provided with a connecting protrusion 71, and the auxiliary valve core 8 is snapped onto the connecting protrusion 71. The auxiliary valve core 8 may be in the form of a sheet, and its size is substantially the same as that of the auxiliary pipe 7. It is elastic and can be deformed under the impact of water flow, thereby creating a gap between the auxiliary valve core 8 and the auxiliary pipe 7 to allow water to flow through.

[0139] In some embodiments, the auxiliary pipe 7 can be inserted into the water inlet end a1 of the pipe a. The auxiliary valve core 8 is disposed at the end of the auxiliary pipe 7 connected to the pipe a. A retaining ring 81 is provided on the circumference of the auxiliary valve core 8. This retaining ring 81 engages with the connecting protrusion 71 to facilitate assembly of the auxiliary check device e within the electrical equipment. In other embodiments, the auxiliary valve core 8 can also be disposed at the end of the auxiliary pipe 7 connected to the output end of the drain pump, which is not a limitation here.

[0140] This application can alleviate the technical problem in the related art that the valve core of the check valve is easily deformed, resulting in partial failure and sealing failure, so as to improve the sealing performance of the smart device and has good practicality.

[0141] In this application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0142] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise" and "counterclockwise" indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0143] In this application, unless otherwise specified or limited, the terms "connect," "fix," etc. should be understood broadly. For example, "fix" can mean fixed connection, detachable connection, or integration; it can mean mechanical connection or electrical connection; it can mean direct connection or indirect connection through an intermediate medium; it can mean internal communication between two elements or interaction between two elements. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0144] In addition, the terms "first," "second," and so on, used in this application are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, features specified as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0145] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and intent of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A check valve, characterized in that: The check valve comprises: The valve seat is provided with a communication port; a valve core disposed in the valve seat, the valve core having 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 includes: A core body is 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 is movable out of the valve seat and connected to the support portion; 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 provided 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 restoring member is connected to the pull rod, a third protrusion is provided on the circumferential surface of the pull rod, and the first restoring member is provided 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 provided 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 provided on the outer side and / or the inner side of the circumferential 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 portion.

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 on the bracket.

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 portion, the driving portion is provided between the support member and the connecting portion, and the driving portion is connected to an output end of the driving member.

12. The check valve according to claim 9, wherein The driving member includes: A drive housing is provided between the bracket and the valve seat; A telescopic body is disposed in the drive housing, and the telescopic body has a telescopic end that moves back and forth along a straight line; a push rod connected to the telescopic end of the telescopic body, the push rod being able to extend out of the drive housing, and the push rod being 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 drive housing.

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

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

15. The check valve according to claim 12, wherein: The side wall of the support shell is provided with a mounting groove, and the drive shell is provided with a hanging ear. The hanging ear and the mounting groove are correspondingly arranged, and the hanging ear is hung in the corresponding mounting groove so that the drive shell is assembled on the support shell.

16. The check valve according to claim 9, wherein A slide groove is provided on the side of the support member, 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, which can be movably connected to the slide groove along a set direction. During the process of the driving member driving 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, wherein: The depth of the first end of the sliding groove is smaller than the depth of the second end of the sliding groove.

18. The check valve according to claim 16 or 17, characterized in that: An arc-shaped retaining section is provided in the middle of the slide groove, and the retaining section is provided below the first end of the slide groove. The center of the retaining section is provided below the retaining section. When the driving member drives the support 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, wherein The chute also includes: a first trough body, a top end of which is configured as the first end; a second trough body, one end of which is connected to the bottom end of the first trough body, and the other end of which is connected to one end of the retaining section, wherein the height of the other end of the second trough body is higher than the height of the one end of the second trough body; The third trough body has a bottom end connected to the other end of the retaining segment and a top end configured as the second end.

20. The check valve according to claim 19, wherein 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, wherein: The first trough body, the second trough body, the retaining section, and the bottoms of the third trough body are parallel planes.

22. The check valve according to claim 21, wherein The depth of the chute decreases sequentially 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 includes a retainer, the retainer is provided on at least one side of the support member, and the slide groove is provided on the retainer.

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. The third connecting rod is configured as the retaining portion.

25. The check valve according to claim 24, wherein Slide grooves are provided on both sides of the support member, and two third connecting rods are relatively provided. The two third connecting rods are slidably connected to the corresponding slide grooves.

26. The check valve according to claim 25, wherein 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 limiting seat is provided on the driving member, at least a portion of the limiting seat is provided on the rotating groove, and a guide portion for the third connecting rod to movably pass through is provided on the limiting 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 29, characterized in that: The electrical equipment also includes: The auxiliary check device comprises an auxiliary pipe and an auxiliary valve core. The auxiliary pipe is connected between the output end of the drainage pump and the water inlet end of the check device. The auxiliary valve core is openably arranged on the auxiliary pipe.

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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