Non-return valve, non-return device and electrical apparatus

Abstract

A non-return valve (B), comprising a valve seat (1), a valve core (2) and a support member (3), wherein the valve seat (1) 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 sealing head (22) that can reciprocate to open and close the communication port (11); and the support member (3) is rotatably connected to the valve seat (1), and a support portion (31) is connected to the valve core (2), such that the sealing head (22) is tightly pressed against the communication port (11).

Description

Check valves, check devices and electrical equipment

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to Chinese patent applications No. 202410341245.4 and No. 202420587319.8 filed on March 25, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0003] The present disclosure belongs to the technical field of electrical equipment, and particularly relates to a check valve, a check device and electrical equipment. Background Art

[0004] Electrical appliances are widely used in daily life, especially in the kitchen and bathroom, such as dishwashers, water purifiers, washing machines, and water heaters. These appliances typically have water flowing through them. After being processed by the appliance, the water needs to be discharged. Therefore, check valves are often required to prevent the discharged water from flowing back into the appliance and affecting its operation.

[0005] In the related art, after long-term use, the check valve may have an unreliable sealing problem, thereby reducing the sealing performance of the check valve.

[0006] Summary of the Invention

[0007] The present disclosure 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.

[0008] In a first aspect of the present disclosure, the present disclosure provides a check valve, which includes: a valve seat provided with a communication 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 communication 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 communication port.

[0009] In the check valve according to some embodiments of the present disclosure, since the valve seat of the check valve is provided with a communication port, and the valve core is disposed within the valve seat, and since 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 a check function. Since the support member is rotatably connected to the valve seat, when the communication port is open, the valve core can drive the support member to rotate, and when the communication port is closed, the support portion of the support member can limit the movement of the sealing head within the valve seat, so that the sealing head is tightly against the communication port, thereby improving the sealing reliability and sealing effect of the sealing head and enhancing practicality.

[0010] 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.

[0011] In some embodiments, the valve core includes: a core body connected to the valve cavity; the sealing head is arranged on the head of the core body; and at least a portion of the sealing head is elastic.

[0012] In some embodiments, the valve core includes: a pull rod, one end of which is connected to the sealing head, and the other end of which can be movably extended from the valve seat and connected to the support portion.

[0013] In some embodiments, the valve core includes: a first reset member, one end of which is connected to the sealing head or the pull rod, and the other end of which is connected to the valve cover.

[0014] In some embodiments, when the communication port is open, the pull rod and the sealing head move in a direction away from the communication port, the pull rod drives the supporting portion of the support member to rotate, and the first restoring member is deformed.

[0015] In some embodiments, when the connecting port is closed, the first reset member deforms and recovers, forcing the pull rod and the sealing head to move toward the connecting port to close the connecting port, and the pull rod drives the support member to rotate to the initial position. The support part of the support member limits the movement of the sealing head in the valve seat to improve the sealing reliability and sealing effect of the sealing head.

[0016] In some embodiments, one end of the pull rod is plugged into the back of the sealing head.

[0017] 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.

[0018] In some embodiments, a second protrusion is provided on the periphery of the pull rod, and the second protrusion can be pressed against the back of the sealing head to improve the reliability of the connection between the pull rod and the sealing head.

[0019] 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 circumferential surface of the pull rod, and the first restoring member is provided between the third protrusion and the valve cover.

[0020] 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.

[0021] In some embodiments, a sealing protrusion is provided on the outer side and / or the inner side of the circumferential surface of the back of the core body to improve the reliability of the connection between the valve core and the valve seat.

[0022] In some embodiments, the other end of the pull rod is inserted into the support portion.

[0023] 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.

[0024] 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.

[0025] In some embodiments, a driving portion is provided on the support member, 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.

[0026] In some embodiments, the driving member includes: a driving housing disposed between the bracket and the valve seat.

[0027] In some embodiments, the driving member includes: a telescopic body, which is disposed in the driving housing, and the telescopic body has a telescopic end that moves back and forth along a straight line.

[0028] In some embodiments, the driving member includes: a push rod connected to the telescopic end of the telescopic body, the push rod being extendable from the driving housing, the push rod being configured as an output end of the driving member;

[0029] In some embodiments, the driving member includes: a second restoring member connected between the telescopic end of the telescopic body and the driving housing.

[0030] In some embodiments, when the communication port is open, the telescopic end of the telescopic body extends to drive the support member to rotate, thereby driving the pull rod and the sealing head to move away from the communication port to open the communication port, and the second reset member is deformed.

[0031] In some embodiments, when the connecting port is closed, the second reset member deforms and recovers, forcing the telescopic end of the telescopic body to return to its position, driving the support member to rotate to its initial position, thereby driving the pull rod and the sealing head to move toward the connecting port to close the connecting port.

[0032] 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 provided in the driving housing in a sliding manner to guide the movement of the push rod.

[0033] In some embodiments, the telescopic body is a wax motor to reduce costs.

[0034] In some embodiments, a slide groove is provided on a side of the support member, and 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.

[0035] In some embodiments, the check valve further comprises a retaining member rotatably connected to the valve seat, the retaining member having a retaining portion that is 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, so that when the communication port is open, the driving member can stop operating, thereby reducing energy loss.

[0036] In some embodiments, the depth of the first end of the slide groove is less 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.

[0037] In some embodiments, a curved retaining segment is disposed in the middle of the chute. The retaining segment is disposed below the first end of the chute. The center of the retaining segment is disposed below the retaining segment. During the process of the driving member driving the support member to rotate on the bracket, the retaining portion can be retained at the top of the retaining segment.

[0038] In some embodiments, the chute further includes: a first chute body, the top end of which is configured as the first end.

[0039] In some embodiments, the slide groove also includes: a second groove body, one end of which is connected to the bottom end of the first groove body, and the other end is connected to one end of the retaining section, and the height of the other end of the second groove body is higher than the height of one end of the second groove body.

[0040] In some embodiments, the slide groove further includes: a third groove body, the bottom end of which is connected to the other end of the retaining segment, and the top end is configured as the second end.

[0041] In some embodiments, 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 segment. The depth of the other end of the retaining segment is greater than the depth of the bottom end of the third groove body.

[0042] 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.

[0043] In some embodiments, the depth of the chute decreases sequentially from the first end to the second end.

[0044] 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.

[0045] In some embodiments, 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 via the second connecting rod, and the third connecting rod is configured as the retaining portion.

[0046] 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.

[0047] 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.

[0048] In some embodiments, 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.

[0049] 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.

[0050] According to the second aspect of the present disclosure, a check device is further 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.

[0051] According to some embodiments of the present disclosure, the non-return device can improve the sealing reliability and sealing effect of the sealing head and improve the practicality.

[0052] 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.

[0053] According to a third aspect of the present disclosure, an electrical device is further provided, comprising the aforementioned non-return device.

[0054] The electrical equipment provided with the non-return device can improve the sealing reliability and sealing effect of the sealing head and improve the practicality.

[0055] 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.

[0056] In some embodiments, the electrical device further comprises an auxiliary check device comprising an auxiliary pipe and an auxiliary valve core, wherein 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 disposed on the auxiliary pipe.

[0057] 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

[0058] 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.

[0059] FIG1 shows a schematic structural diagram of a non-return device according to one or more embodiments of the present disclosure;

[0060] FIG2 shows a schematic top view of the non-return device in FIG1 ;

[0061] FIG3 shows a schematic cross-sectional view taken along the section line AA in FIG1 ;

[0062] FIG4 shows a schematic cross-sectional view taken along the BB section line in FIG2 ;

[0063] FIG5 shows an exploded schematic diagram of the non-return device in FIG1 ;

[0064] FIG6 shows a schematic diagram of the assembly structure of the valve seat in FIG1 on the pipeline;

[0065] FIG7 is a schematic diagram showing the assembly structure of the valve seat on the pipeline in FIG1 from another perspective;

[0066] FIG8 is a cross-sectional schematic diagram showing the assembly structure of the valve seat in FIG6 on the pipeline;

[0067] FIG9 shows a schematic structural diagram of the valve core in FIG1 ;

[0068] FIG10 shows a schematic cross-sectional view of the valve core in FIG9 ;

[0069] FIG11 shows a schematic structural diagram of the pull rod in FIG1 ;

[0070] FIG12 shows a schematic structural diagram of the support member in FIG1 ;

[0071] FIG13 shows a schematic structural diagram of the bracket in FIG1 ;

[0072] FIG14 shows a schematic structural diagram of the driving member in FIG1 ;

[0073] FIG15 shows a schematic cross-sectional view of the driving member in FIG14 ;

[0074] FIG16 shows a schematic structural diagram of a backflow prevention device having a retaining frame and a retaining member according to some embodiments of the present disclosure;

[0075] FIG17 shows a cross-sectional schematic diagram of the anti-return device in FIG16 ;

[0076] FIG18 shows a schematic structural diagram of the support member in FIG16 ;

[0077] FIG19 is a schematic structural diagram showing another perspective of the support member in FIG16 ;

[0078] FIG20 shows a schematic structural diagram of the retaining member of FIG16;

[0079] FIG21 shows a schematic structural diagram of the valve cover in FIG16 ;

[0080] FIG22 shows a schematic structural diagram of the bracket in FIG16 ;

[0081] FIG23 shows a schematic structural diagram of the anti-return device in FIG16 with a detection switch;

[0082] FIG24 shows a schematic structural diagram of an electrical device according to one or more embodiments of the present disclosure;

[0083] FIG25 shows a cross-sectional schematic diagram of the electrical device in FIG24;

[0084] FIG26 shows a schematic structural diagram of the auxiliary non-return device in FIG24; and

[0085] FIG. 27 shows a schematic assembly diagram of the auxiliary non-return device in FIG. 26 .

[0086] Explanation of the reference numerals: a, pipeline; a1, water inlet end; a2, water outlet end; b, check valve; 1, valve seat; 11, communicating port; 12, valve chamber; 13, valve cover; 131, clamping portion; 14, first connecting plate; 15, rotating groove; 2, valve core; 21, core body; 211, sealing protrusion; 22, sealing head; 23, pull rod; 231, first protrusion; 232, second protrusion; 233, third protrusion; 234, limiting column; 235, fourth protrusion; 24, first reset member; 3, support member; 31, supporting portion; 32, connecting portion; 321, slot; 4, bracket; 41, supporting block; 42, supporting housing; 421, mounting groove; 422, second connecting plate; 43, cantilever; 44, detection switch; 45, limiting seat; 46, guide portion; 5. Driving member; 51. Driving housing; 52. Telescopic body; 53. Push rod; 54. Second reset member; 55. Guide block; 56. Hanging ear; 6. Assembly cavity; c. Container; d. Drain pump; e. Auxiliary check device; 7. Auxiliary pipeline; 71. Connecting protrusion; 8. Auxiliary valve core; 81. Snap ring; 9. Retaining frame; 91. Slide groove; 911. First groove body; 912. Second groove body; 913. Retaining section; 914. Third groove body; 915. First step; 916. Second step; 917. Third step; 918. Fourth step; 10. Retaining member; 101. First connecting rod; 102. Second connecting rod; 103. Third connecting rod. DETAILED DESCRIPTION

[0087] In order to enable those skilled in the art to understand the present disclosure more clearly, the technical solutions in the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present disclosure.

[0088] 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 installed on the pipe and has a connecting port to connect the inlet and the outlet. When the electrical equipment is draining, the connecting port of the check valve opens, allowing water to flow through the check device to the drain pipe. After the electrical equipment has finished draining, the connecting port of the check valve closes to prevent any residual water in the drain pipe from flowing back.

[0089] 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.

[0090] Based on the above technical problems, according to some embodiments of the present disclosure, a check valve, a check device and an electrical device are provided, aiming 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.

[0091] Figure 1 is a schematic structural diagram of a check device according to one or more embodiments of the present disclosure, Figure 2 is a schematic top view of the check device in Figure 1, Figure 3 is a schematic cross-sectional view taken along section line AA in Figure 1, and Figure 4 is a schematic cross-sectional view taken along section line BB in Figure 2. As shown in Figures 1-4, consistent with related art, the check device according to some embodiments of the present disclosure also includes a pipe a and a check valve b. Pipe a has an inlet end a1 and an outlet end a2. Check valve b is disposed on pipe a and has a communication port 11 that connects the inlet end a1 and the outlet end a2.

[0092] Figure 5 shows an exploded schematic diagram of the check device in Figure 1. As shown in Figures 1 to 5, the check valve b according to some embodiments of the present disclosure includes a valve seat 1, a valve core 2 and a support member 3. The valve seat 1 is provided with a connecting port 11, and the valve core 2 is provided 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 connecting 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, and the support member 3 is provided with a support portion 31. 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 is pressed against the connecting port 11.

[0093] In the check valve b according to some embodiments of the present disclosure, since the valve seat 1 of the check valve b is provided with a connecting port 11, and the valve core 2 is provided 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 connecting port 11, so that the corresponding pipeline a can be opened and closed to realize the 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 can drive the support member 3 to rotate, so that when the connecting port 11 is closed, the support portion 31 of the support member 3 can limit 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 improve practicality.

[0094] Figure 6 shows a schematic diagram of the assembly structure of the valve seat in Figure 1 on a pipeline, Figure 7 shows a schematic diagram of the assembly structure of the valve seat in Figure 1 on a pipeline from another perspective, and Figure 8 shows a cross-sectional schematic diagram of the assembly structure of the valve seat in Figure 6 on a pipeline. As shown in Figures 1-8, in some embodiments, the valve seat 1 can be provided with a valve cavity 12 and a valve cover 13, with the communication port 11 provided at one end of the valve cavity 12 and the valve cover 13 provided at the other end of the valve cavity 12 to seal the valve cavity 12.

[0095] Figure 9 shows a schematic structural diagram of the valve core in Figure 1, and Figure 10 shows a schematic cross-sectional diagram of the valve core in Figure 9. As shown in 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 to the valve cavity 12, and the sealing head 22 is arranged on the head of the core body 21, and 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 portion 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 communication port 11 is open, the tie rod 23 and the sealing head 22 move away from the communication port 11. The tie rod 23 drives the support portion 31 of the support member 3, causing the support member 3 to rotate and the first reset member 24 to deform. When the communication port 11 is closed, the first reset member 24 recovers its shape, forcing the tie rod 23 and the sealing head 22 to move toward the communication port 11, thereby closing the communication port 11. The tie rod 23 also drives the support member 3 to rotate to its initial position. The support portion 31 of the support member 3 limits 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.

[0096] As shown in Figures 4 and 8, in some embodiments, the angle between the centerline of the communication port 11 and the centerline of the water inlet end a1 is an obtuse angle. When the electrical device is draining, water flows in from the water inlet end a1 of the check device. Since the angle between the centerline of the communication port 11 and the centerline 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 tie rod 23 and the sealing head 22 to move away from the communication port 11. The tie rod 23 then drives the support portion 31 of the support member 3, causing the support member 3 to rotate and the first reset member 24 to deform. When the electrical device finishes draining, water stops flowing from the water inlet end a1 of the check device, and the first reset member 24 recovers its deformation, forcing the tie rod 23 and the sealing head 22 to move toward the communication port 11 to close the communication port 11. The tie rod 23 also drives the support member 3 to rotate to its initial position, 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.

[0097] 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.

[0098] As shown in Figures 9 and 10, in some embodiments, the sealing head 22 can be made of an elastic material so that the sealing head 22 and the pull rod 23 can move together. In addition, the core 21 is axially through, and the sealing head 22 is connected to the front end of the core 21, and the rear end of the core 21 can be connected to the valve seat 1.

[0099] 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.

[0100] As shown in Figures 3-5 and 9-10, in some embodiments, the valve cover 13 is provided with a clamping portion 131. The clamping portion 131 is provided on the side of the valve cover 13 facing the valve cavity 12. The clamping portion 131 is provided with a gap within the valve cavity 12. The back of the core 21 is clamped between the clamping portion 131 and the valve seat 1 to achieve connection of the valve core 2 within the valve seat 1.

[0101] As shown in Figures 9 and 10, in other embodiments, the clamping portion 131 can be a clamping protrusion provided on the side of the valve cover 13 facing the valve cavity 12, and the clamping protrusion is generally cylindrical. The back of the core 21 is clamped between the clamping protrusion and the valve seat 1.

[0102] 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.

[0103] As shown in FIG. 3 and FIG. 4 , in some embodiments, one end of the tie rod 23 may be plugged into the back of the sealing head 22 to achieve the connection between the tie rod 23 and the sealing head 22 .

[0104] FIG11 is a schematic structural diagram of the pull rod in FIG1 . As shown in FIG3-FIG5 and FIG9-FIG11 , in some embodiments, a first protrusion 231 may be provided at one end of the pull rod 23. The first protrusion 231 is provided in the sealing head 22 to achieve the connection between the sealing head 22 and the pull rod 23. In addition, a second protrusion 232 is provided around the pull rod 23. The second protrusion 232 can be pressed against the back of the sealing head 22. When the connecting port 11 is open, there is a certain gap between the second protrusion 232 and the sealing head 22. When the connecting port 11 is closed, the second protrusion 232 presses against the back of the sealing head 22 to increase the area of ​​the pull rod 23 pushing the sealing head 22, thereby improving the reliability of the connection between the pull rod 23 and the sealing head 22.

[0105] As shown in Figures 3-5 and 9-11, in some embodiments, under the condition that one end of the first reset member 24 is connected to the pull rod 23, a third protrusion 233 can be provided on the circumferential surface of the pull rod 23, and the first reset member 24 is disposed between the third protrusion 233 and the valve cover 13. A plurality of limiting posts 234 can be spaced apart on the circumferential surface of the third protrusion 233 facing the valve cover 13. The first reset member 24 can be an elastic member and can be mounted on the pull rod 23. The end of the first reset member 24 connected to the third protrusion 233 can be disposed between the plurality of limiting posts 234 and the pull rod 23 to improve the reliability of the connection between the first reset member 24 and the pull rod 23.

[0106] 3-5 and 11 , in some embodiments, the other end of the pull rod 23 may be inserted into the support portion 31 . In other embodiments, the other end of the pull rod 23 may be provided with a fourth protrusion 235 , which is inserted into the support portion 31 .

[0107] As shown in 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. In other embodiments, the four protrusions can also be square, etc., which is not shown here.

[0108] FIG12 is a schematic structural diagram of the support member of FIG1 . As shown in FIG1 to FIG5 and FIG12 , in some embodiments, the check valve b may further include a bracket 4, which is connected to the valve seat 1. The support member 3 has a connecting portion 32, which is rotatably connected to the bracket 4, and the support member 3 can swing back and forth around its connecting portion 32. When the communication port 11 is open, the valve core 2 drives the support member 3 to rotate around 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 around the connecting portion 32, so that the support portion 31 of the support member 3 limits 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.

[0109] FIG13 is a schematic structural diagram of the bracket in FIG1 . As shown in FIG2 , FIG3 , FIG5 , FIG12 , and FIG13 , in other embodiments, the connecting portion 32 and the supporting portion 31 of the support member 3 may be disposed at both ends of the support member 3. The connecting portion 32 of the support member 3 may be provided with a slot 321. The bracket 4 is provided with a support block 41. The support block 41 is disposed in the slot 321 and is rotatably connected to the connecting portion 32 of the support member 3 via a connecting member such as a pin, thereby enabling the support member 3 to be rotatably disposed on the bracket 4.

[0110] As shown in Figures 5 and 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 is in the assembly cavity 6 formed by the support shell 42 and the valve seat 1.

[0111] As shown in Figures 5 and 13, in some other embodiments, two or more first connecting plates 14 are provided on the outer circumference of the valve seat 1. A second connecting plate 422 is provided on the outer circumference of the support housing 42. The second connecting plates 422 are provided corresponding to the first connecting plates 14. The second connecting plates 422 and the corresponding first connecting plates 14 are assembled using bolts or other fasteners to achieve assembly of the support housing 42 on the valve seat 1. The support block 41 can be connected to the top of the support housing 42 via a cantilever 43.

[0112] As shown in Figures 2, 3, and 5, when the communication port 11 is closed, the pull rod 23 on the valve core 2 is held in position by the support portion 31 of the support member 3. Therefore, when the communication 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, thereby preventing the support member 3 from rotating and the communication port 11 from being smoothly opened. Based on the above situation, the check valve b according to some embodiments of the present disclosure may also be provided with a driving member 5 to assist the support member 3 in rotating so that the communication port 11 can be smoothly opened.

[0113] As shown in Figures 2, 3 and 5, in some embodiments, the check valve b may further include a drive member 5. The drive member 5 is connected to the valve seat 1. The drive member 5 has a retractable output end. The output end of the drive 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, 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 flow impacts the sealing head 22 of the valve core 2, forcing the pull rod 23 to move together with the sealing head 22 away from the connecting port 11, so that the pull rod 23 drives the support portion 31 of the support member 3, and controls the output end of the drive member 5 to extend, so that the pull rod 23 and the drive member 5 jointly drive the support member 3 to rotate, so that the connecting port 11 can be smoothly opened. During the process of opening 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 is deformed and restored, forcing the pull rod 23 and the sealing head 22 to move toward the connecting port 11, and controlling the output end of the driving member 5 to retract, so that 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 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.

[0114] As shown in Figure 12, in some embodiments, the support member 3 may be provided with a driving portion 33. The driving portion 33 is 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.

[0115] Figure 14 is a schematic structural diagram of the driving member in Figure 1, and Figure 15 is a schematic cross-sectional diagram of the driving member in Figure 14. As shown in Figures 2, 3, 5, and 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. The driving housing 51 is disposed within the assembly cavity 6 formed between the support housing 42 of the bracket 4 and the valve seat 1. The telescopic body 52 is disposed within the driving housing 51 and has a telescopic end that moves back and forth in a straight line. The push rod 53 is connected to the telescopic end of the telescopic body 52 and 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. When the connecting port 11 is open, the telescopic end of the telescopic body 52 extends, 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 connecting port 11, thereby opening the connecting port 11, and the second reset member 54 is deformed; when the connecting port 11 is closed, the second reset member 54 is deformed and restored, forcing the telescopic end of the telescopic body 52 to return to its position, so that the driving support member 3 rotates to its initial position, so as to drive the pull rod 23 and the sealing head 22 to move toward the connecting port 11, so as to close the connecting port 11.

[0116] As shown in Figures 2, 3 and 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 arranged in the drive housing 51 to guide the movement of the push rod 53. In other embodiments, the telescopic end of the telescopic body 52 can be connected to one side of the guide block 55 by means of a thread, a key connection, etc. The push rod 53 can be connected to the other side of the guide block 55 by means of a thread, a key connection, etc. The second reset member 54 can be a spring, and the second reset member 54 is mounted on the push rod 53. The two ends of the second reset member 54 can be respectively provided on the guide block 55 and the inner wall of the drive housing 51, which is not limited here.

[0117] In some embodiments, the telescopic body 52 can be a wax motor. The wax motor is a method of using wax to expand due to heat to drive the telescopic end to extend and retract. 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, thereby driving the push rod 53 to overcome the pressure of the second reset member 54 and move outward, and then the push rod 53 pushes the driving part on the support member 3, causing the support member 3 to rotate around the connecting part 32, so that the support part 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 function of extending, so its cost is relatively low. Accordingly, the return of the telescopic end of the wax motor requires the force generated by the recovery deformation of the second reset member 54.

[0118] As shown in FIG5 and FIG13-15, in some embodiments, a mounting groove 421 is provided on the side wall of the support housing 42. A lug 56 is provided on the drive housing 5. The lug 56 corresponds to the mounting groove 421 and is mounted in the corresponding mounting groove 421 to enable the drive housing 5 to be assembled within the support housing 42. In other embodiments, two mounting grooves 421 may be provided, with one side of the side wall of the mounting groove 421 being open. Accordingly, two lugs 56 are also provided. The two lugs 56 can be pushed through the open mounting groove 421 to push the lugs 56 into the corresponding mounting groove 421. The support housing 42 is then connected to the valve seat 1, thereby securing the drive housing 5 between the support housing 42 and the valve seat 1. This allows for simple, quick, and reliable assembly and improves practicality.

[0119] In some embodiments, the output end of the driver 5 can be connected to the driving portion of the support member 3. The output end of the driver 5 can be connected to the driving portion of the support member 3 by means of plugging, screwing, or keying, so that the extension and contraction of the output end of the driver 5 drives the rotation of the support member 3. When the communication 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 communication port 11 can be 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, so that when the communication 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 the opening of the communication port 11. When the communication port 11 is closed, the extension end of the driver 5 returns to its original position, so that 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.

[0120] 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.

[0121] According to some embodiments of the present disclosure, the check valve b and the check device can improve the sealing reliability and sealing effect of the sealing head 22 and improve practicality.

[0122] 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 will consume more energy, which will affect the cost of use.

[0123] Figure 16 shows a schematic structural diagram of a non-return device having a retaining frame and a retaining member according to some embodiments of the present disclosure, and Figure 17 shows a schematic cross-sectional diagram of the non-return device in Figure 16. As shown in Figures 16 and 17, based on the above-mentioned technical problems, a slide groove 91 can be provided on the side of the support member 3 of the check valve b according to some embodiments of the present disclosure. 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. The retaining member 10 has a retaining portion 104. 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.

[0124] In the check valve with the retaining member 10, under the condition that the communication port 11 is open, the driving member 5 drives the support member 3 to rotate around the connecting portion 32 of the support member 3 to open the communication port 11, so that the check valve opens, and drives the retaining portion 104 of the retaining member 10 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, and then controls the driving member 5 to stop working, and then maintains the support member 3 through the retaining portion 104 of the retaining member 10, so that the check valve remains open, so as to reduce energy loss and improve practicality.

[0125] Figure 18 is a schematic structural diagram of the support member 3 in Figure 16, and Figure 19 is a schematic structural diagram of the support member in Figure 16 from another perspective. As shown in Figures 18 and 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 of the chute 91 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 to the chute 91 along a set direction.

[0126] As shown in Figures 18 and 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. The center of the retaining segment 913 is provided below the retaining segment 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 segment 913. In other embodiments, the top of the retaining portion 104 is located in the middle of the retaining segment 913, and the two ends of the retaining portion 104 are respectively the bottom of the retaining segment 913.

[0127] As shown in Figures 18 and 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. The top 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, and the other end of the second chute body 912 is connected to one end of the retaining section 913. The height of the other end of the second chute body 912 is higher than the height of the 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 retaining section 913, and the top of the third chute body 914 is configured as a second end. In other embodiments, when the driving member 5 is not in operation, the retaining portion 104 of the retaining member 10 is located at the top of the first slot 911 (i.e., the first end of the chute 91). When the driving member 5 is in operation, 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 retaining portion 104 of the retaining member 10 can only slide within the first slot 911 toward the bottom of the first slot 911 until it reaches the bottom of the first slot 911, at which point the driving member 5 stops operating. Under the action of gravity of the support member 3, the retaining portion 104 of the retaining member 10 slides from the bottom of the first slot 911 to the second slot 912, and continues to slide to the top of the retaining segment 913. Due to the limitation of the retaining segment 913, the retaining portion 104 of the retaining member 10 cannot continue to slide within the retaining segment 913, so that the retaining portion 104 remains in the chute 91. The support member 3 is supported by the retaining portion 104 of the retaining member 10, so that the check valve remains open, and 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, causing the support member 3 to continue to rotate in the direction away from the driving member 5, so that 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 deformation recovery of the second reset member, 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, and 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.

[0128] As shown in Figures 18 and 19, in 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 section 913, thereby forming a third step 917. The depth of the other end of the retaining section 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 section 913, and the third groove 914 are parallel planes, thereby allowing the retaining portion 104 of the retaining member 10 to rotate within the chute 91 along a set direction.

[0129] 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.

[0130] As shown in Figures 16 and 17 , in some embodiments, the check valve (B) may further include a retainer 9. The retainer 9 is provided on at least one side of the support member 3, and a chute 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 chute 91.

[0131] FIG20 is a schematic diagram illustrating the structure of the retaining member of FIG16 . As shown in FIG20 , 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 is rotatably connected to the valve seat. The third connecting rod 103 is connected to the first connecting rod 101 via the second connecting rod 102. The third connecting rod 103 is configured as a retaining portion 104.

[0132] In other embodiments, both sides of the support member 3 may be provided with a slide groove 91. Two third connecting rods 103 are provided opposite to each other. The two third connecting rods 103 are slidably connected to the corresponding slide grooves 91 to maintain the support member 3 in a balanced state.

[0133] FIG21 is a schematic structural diagram of the valve cover in FIG16 . As shown in FIG16 , FIG17 and FIG21 , 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 . FIG22 is a schematic structural diagram of the bracket in FIG16 . As shown in FIG16 , FIG17 and FIG22 , a limit seat 45 can be provided on the bracket 4. 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 , and the limit seat 45 is provided with a guide portion 46 for the third connecting rod 103 to move through. The guide portion 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.

[0134] In other embodiments, 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.

[0135] FIG23 shows a schematic structural diagram of the check valve in FIG16 with a detection switch. As shown in FIG23 , the bracket 4 can also be provided with a detection switch 44. 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, thereby confirming that the check valve is in the closed state.

[0136] Based on the above-mentioned non-return device, the present disclosure further provides an electrical device, which includes the above-mentioned non-return device.

[0137] The electrical equipment having the above-mentioned non-return device can improve the sealing reliability and sealing effect of the sealing head 22 and improve the practicality.

[0138] 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.

[0139] FIG24 is a schematic diagram of the structure of an electrical device according to one or more embodiments of the present disclosure, and FIG25 is a schematic cross-sectional diagram of the electrical device in FIG24 . As shown in FIG24 and FIG25 , the dishwasher includes a drain pump d and a container c for holding water, and the input end of the drain pump d is connected to the container c. 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 connecting port 11 of the check valve b to open, allowing the water to flow through the check device to the drain pipe; after the drainage is completed, the connecting port 11 of the check valve b is closed to prevent the residual water remaining in the drainage pipe a from flowing back into the container c.

[0140] As shown in Figures 24 and 25 , in some embodiments, the electrical device may further include an auxiliary check device e. Figure 26 shows a schematic structural diagram of the auxiliary check device in Figure 24 , and Figure 27 shows a schematic assembly diagram of the auxiliary check device in Figure 26 . As shown in Figures 26 and 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, and the auxiliary valve core 8 is openably disposed on the auxiliary pipe 7. When the electrical device is draining water, the wax motor is pre-energized. After the water inlet end a1 and the water outlet end a2 of the check device are connected, the drain pump is activated, causing water in the container to impact the auxiliary valve core 8, thereby opening the auxiliary pipe 7 of the auxiliary check device e. Water then flows through the auxiliary check device e and the check device into the drain pipe. After draining water, the wax motor is de-energized. During the period when the check device valve core returns to its original position, the remaining water in the drain pipe flows through the pipe under the action of gravity. After flowing through the auxiliary check device e, the remaining water is blocked by the auxiliary valve core 8 of the auxiliary check device e. After the check valve core is reset, the check device's water inlet a1 and outlet a2 are disconnected. Thus, the auxiliary check device e utilizes the elasticity of the auxiliary valve core 8 to seal the pipeline, resulting in a faster operation but prone to leakage. Check valve b offers excellent sealing stability, but due to the characteristics of the wax motor, it operates more slowly. The present disclosure utilizes a combination of these two check valves to prevent residual water in the drainage pipeline from flowing back into the container, improving practicality.

[0141] As shown in Figures 26 and 27 , in some embodiments, the end of the auxiliary pipe 7 may be provided with a connecting protrusion 71, onto which the auxiliary valve core 8 is snapped. The auxiliary valve core 8 may be in the form of a sheet, roughly the same size as the auxiliary pipe 7, and elastic. Under the impact of water flow, the auxiliary valve core 8 may deform, creating a gap between the auxiliary valve core 8 and the auxiliary pipe 7, allowing water to flow through.

[0142] 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.

[0143] The present disclosure 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 check valve and improve practicality.

[0144] In the present disclosure, 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 includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature includes the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0145] In the description of the present disclosure, 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 disclosure 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 disclosure.

[0146] In this disclosure, unless otherwise expressly specified or limited, the terms "connect," "fix," etc. should be understood broadly. For example, "fix" can mean a fixed connection, a detachable connection, or an integral connection; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean internal communication between two elements or an interaction between two elements. Those skilled in the art will understand the specific meanings of the above terms in this disclosure based on specific circumstances.

[0147] In addition, the terms "first," "second," and so on, used in this disclosure are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this disclosure, "plurality" means two or more, unless otherwise specifically defined.

[0148] Although the embodiments of the present disclosure have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations may be made to the embodiments without departing from the principles and spirit of the present disclosure, the scope of which is defined by the claims and their equivalents.

Claims

1. A check valve comprising: 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; as well as 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, wherein 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; and 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, wherein: One end of the pull rod is plugged into the back of the sealing head.

4. The check valve according to claim 2 or 3, wherein: 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, wherein: 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 5, wherein: 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 any one of claims 2 to 6, wherein: 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 7, wherein: 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 8, further comprising: 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 any one of claims 1 to 9, further comprising: 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, wherein: 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 any one of claims 9 to 11, 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; and 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 or 13, wherein: The telescopic body is a wax motor.

15. The check valve according to any one of claims 12 to 14, 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 any one of claims 9, 11, 12, 13 or 15, 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, wherein: 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 any one of claims 16 to 18, wherein: The chute also includes: a first trough body, a top end of which is configured as the first end; The second trough body has one end connected to the bottom end of the first trough body and the other end connected to one end of the holding section. The height of the end is higher than the height of one end of the second trough body; and 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 19 or 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 any one of claims 16 to 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 to 22, wherein: 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 to 22, wherein: 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 24 or 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 comprising: 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, wherein: 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 comprising the non-return device according to claim 27 or 28.

30. The electrical device according to claim 29, further comprising: container, and 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, further comprising: 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, wherein: 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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