Anti-siphon structure and washing machine thereof

Abstract

The invention discloses an anti-siphon structure and a washing machine thereof.The anti-siphon structure comprises a drainage pipe and an anti-siphon pipe, the anti-siphon pipe is a side branch of the drainage pipe and communicated with the drainage pipe, and the anti-siphon structure further comprises a check valve installed in the anti-siphon pipe and used for closing the anti-siphon pipe when the drainage pipe finishes drainage and generates siphon. The check valve opens the anti-siphon pipe to introduce air into the drainage pipe to damage the siphon effect of the drainage pipe. In the drainage process, water flow generates acting force to drive the check valve to close, the water flow is discharged from the drainage pipe, and when the drainage pipe finishes drainage and generates siphoning, negative pressure is formed due to the siphoning phenomenon, the negative pressure generates acting force to drive the check valve to open, air enters the drainage pipe to damage the siphoning effect of the drainage pipe, and water is prevented from entering the inner barrel for cleaning clothes; water flow is drained out of the inner barrel due to the siphon effect, water continues to be fed into the inner barrel, water is fed into the inner barrel while water is drained, and water resources are wasted.

Description

Technical Field

[0001] The invention belongs to the technical field of anti-siphoning, and in particular relates to an anti-siphoning structure and a washing machine thereof. Background Art

[0002] In existing drum washing machines, whether they use an upper drainage structure or a lower drainage structure, the drainage pump is directly connected to the drainage pipe. When the user uses the washing machine to fill the washing tub with water, too much water may enter the washing tub, so a drainage pump is needed to drain the excess water. The drainage pump stops working after drainage. If there is undrained water in the drainage pipe and the water outlet of the drainage pipe is lower than the water outlet of the washing tub, a siphon phenomenon will occur, and drainage will continue, reducing the amount of water in the washing tub. At the same time, the system controls the washing machine to continue to fill with water, causing the washing machine to fill with water and drain at the same time, which not only wastes water resources, but also affects washing and brings a bad experience to users.

[0003] In order to prevent the siphon phenomenon from causing the washing machine's washing tub to take in water and drain out at the same time, existing washing machines mostly adopt a delayed water inlet control method, that is, when the washing machine is draining, if the water level sensor cannot detect the water in the drum, it will delay for a certain period of time to ensure that the water in the drain pipe is emptied, and then control the water inlet valve to let water in. However, after using it for a period of time, the contact port between the drain pipe and the floor drain is easily blocked by wire scraps, resulting in a slower drainage speed, making the delay time insufficient, and the water in the drain pipe still cannot be emptied within the specific delay time.

[0004] Chinese patent application number 201510217762.1 discloses a drainage anti-siphon device and a washing machine equipped with the device, including a water outlet pipe and an air pipe. The water outlet pipe includes a first water pipe and a second water pipe connected to each other. The diameter of at least part of the second water pipe is larger than the diameter of the first water pipe. One end of the air pipe is connected to the second water pipe, and the connection between the air pipe and the second water pipe is located on the radial surface of the second water pipe.

[0005] In the above technical solution, the variable diameter structure of the air pipe and the water outlet pipe is used to prevent dirty water from flowing back into the washing outer drum through the air pipe. It does not solve the problem that when washing clothes with a washing machine, the washing drum takes in too much water and needs to be drained. After the drainage is completed, the water remaining in the drainage passage is prone to siphoning, causing the water in the washing drum to be discharged through the siphon phenomenon. At the same time, the control system lets water into the washing drum again, resulting in a waste of water resources.

[0006] In view of this, the present invention is proposed. Summary of the invention

[0007] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art. On the one hand, the present invention provides an anti-siphon structure. When the drainage in the drain pipe ends and a siphon is generated, the check valve opens the anti-siphon pipe to allow air to enter the drain pipe to destroy the siphon effect of the drain pipe, thereby preventing water from entering the inner drum when cleaning clothes. The water flows out of the inner drum due to the siphon effect. At this time, water continues to enter the inner drum, causing the inner drum to drain water while entering water, resulting in a waste of water resources.

[0008] Another aspect of the present invention provides a washing machine.

[0009] In order to solve the above technical problems, the basic concept of the technical solution adopted by the present invention is:

[0010] An anti-siphon structure includes a drain pipe and an anti-siphon pipe, wherein the anti-siphon pipe is a side branch of the drain pipe and is connected to the drain pipe. The anti-siphon structure also includes a check valve installed in the anti-siphon pipe, which is used to open the anti-siphon pipe to allow air to enter the drain pipe when the drain pipe ends draining and generates a siphon, thereby destroying the siphon effect of the drain pipe.

[0011] Preferably, the drainage pipe includes an inlet pipe section, an outlet pipe section and a connecting pipe section connecting the inlet pipe section and the outlet pipe section.

[0012] The water inlet pipe section extends upward and is communicated with one end of the connecting pipe section, the other end of the connecting pipe section is communicated with the water outlet pipe section, and the water outlet pipe section extends downward.

[0013] The anti-siphon pipe is arranged beside the water inlet pipe section and is connected with the drainage pipe through a three-way pipe fitting.

[0014] Preferably, the three-way pipe fitting comprises a first pipe opening, a second pipe opening and a third pipe opening, the water inlet pipe section is connected to the first pipe opening, the connecting pipe section is connected to the third pipe opening, and the anti-siphon pipe is connected to the second pipe opening.

[0015] Preferably, the check valve comprises a valve body, a first opening is formed at one end of the valve body, and the other end opposite thereto is a beveled end surface, the beveled end surface is elliptical in shape, and a valve cover for opening and closing the second opening is provided on the beveled end surface.

[0016] Preferably, the chamfered end surface further includes a sealing portion, the valve cover is pivotally connected to the sealing portion, and the distance from the sealing portion to the first opening is smaller than the distance from the second opening to the first opening.

[0017] Preferably, the valve cover is provided with a counterweight.

[0018] Preferably, a fixing portion for connecting to the valve cover is provided on a side of the sealing portion close to the drain pipe.

[0019] Preferably, a sealing ring is sleeved on the outer periphery of the valve body, the sealing ring is fitted with the inner wall of the anti-siphon tube, and the anti-siphon tube is plugged into the second pipe opening of the three-way pipe fitting.

[0020] A washing machine comprises a housing, an outer drum and a drainage pump;

[0021] One end of the anti-siphon pipe of the anti-siphon structure is connected to the outer cylinder, and the other end is connected to the drain pipe;

[0022] One end of the drainage pipe passes through the drainage port of the box body and is connected to the drainage pump, and the drainage pump is connected to the outer cylinder through a drainage hose.

[0023] Preferably, the connection between the anti-siphon tube and the outer cylinder is located above the water level threshold of the outer cylinder.

[0024] Preferably, the connection between the anti-siphon pipe and the drain pipe is located above the water outlet of the outer cylinder.

[0025] Preferably, the connection between the anti-siphon pipe and the drain pipe is located on the water inlet pipe section of the drain pipe or a partial connecting pipe section of the drain pipe.

[0026] After adopting the above technical scheme, the present invention has the following beneficial effects compared with the prior art.

[0027] The anti-siphon structure of the present invention comprises a drain pipe and an anti-siphon pipe. The anti-siphon pipe is a side branch of the drain pipe and is connected to the drain pipe. A check valve is arranged in the anti-siphon pipe. When the drain pipe stops draining and siphoning occurs, a negative pressure is formed due to the siphon phenomenon. The negative pressure generates a force to drive the check valve to open. The anti-siphon pipe takes air into the drain pipe to destroy the siphon effect of the drain pipe, thereby preventing water from entering the inner drum when cleaning clothes. The water flow is discharged to the outside of the inner drum due to the siphon phenomenon. If water continues to be introduced into the inner drum at this time, the inner drum will be filled with water and drained at the same time, resulting in a waste of water resources.

[0028] The specific implementation modes of the present invention are further described in detail below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The accompanying drawings are part of the present invention and are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention, but do not constitute an improper limitation of the present invention. Obviously, the drawings described below are only some embodiments. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the accompanying drawings:

[0030] Figure 1 It is a structural schematic diagram of the anti-siphon structure of the present invention being assembled on a washing machine;

[0031] Figure 2 It is a schematic diagram of the anti-siphon structure of the present invention;

[0032] Figure 3 It is a structural schematic diagram of the check valve of the present invention being assembled on a pipe fitting;

[0033] Figure 4 It is a schematic diagram of the structure of the check valve of the present invention when it is opened;

[0034] Figure 5 It is a schematic structural diagram of the check valve of the present invention being closed.

[0035] In the figure: 1. box body; 2. water inlet pipe section; 3. water outlet pipe section; 4. check valve; 41. valve body; 42. first opening; 43. chamfered end face; 431. sealing part; 432. second opening; 433. first focus; 434. second focus; 44. valve cover; 441. counterweight; 45. fixing part; 451. hinge; 452. shaft; 46. sealing ring; 5. anti-siphon pipe; 6. three-way pipe fitting; 61. first pipe opening; 62. second pipe opening; 63. third pipe opening; 7. connecting pipe section.

[0036] It should be noted that these drawings and textual descriptions are not intended to limit the conceptual scope of the present invention in any way, but are intended to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0038] In the description of the present invention, it should be noted that the directions or positional relationships indicated by terms such as “upper”, “lower”, “front”, “back”, “left”, “right”, “vertical”, “inside” and “outside” are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0039] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] like Figures 1 to 5As shown, the present invention provides an anti-siphon structure, including a drain pipe and an anti-siphon pipe 5, the anti-siphon pipe 5 is a side branch of the drain pipe, connected to the drain pipe, the anti-siphon structure also includes a check valve 4 installed in the anti-siphon pipe 5, which is used for when the drain pipe ends drainage and generates siphon, the check valve 4 opens the anti-siphon pipe 5 to let air into the drain pipe to destroy the siphon effect of the drain pipe, thereby preventing water from entering the inner drum when cleaning clothes. The water flow is discharged to the outside of the inner drum due to the siphon phenomenon. At this time, if water continues to enter the inner drum, the inner drum will be filled with water and drained at the same time, resulting in a waste of water resources.

[0041] Furthermore, considering the convenience of installation, the anti-siphon tube 5 and the check valve 4 can be an integral structure or a split structure, and the check valve 4 can be a diaphragm check valve, a ball check valve, an air check valve, a spring check valve and an electronic control valve.

[0042] The drainage pipe of the present invention comprises an inlet pipe section 2 , an outlet pipe section 3 and a connecting pipe section 7 connecting the inlet pipe section 2 and the outlet pipe section 3 .

[0043] The water inlet pipe section 2 extends upward and communicates with one end of the connecting pipe section 7, and the other end of the connecting pipe section 7 communicates with the water outlet pipe section 3. The water outlet pipe section 3 extends downward, and the drainage pipe is in a "J" shape, thereby forming an upper drainage structure.

[0044] The anti-siphon pipe 5 is arranged beside the water inlet pipe section 2 and is connected to the drain pipe through a three-way pipe fitting 6.

[0045] Preferably, the three-way pipe fitting 6 includes a first pipe opening 61, a second pipe opening 62 and a third pipe opening 63, the water inlet pipe section 2 is connected to the first pipe opening 61, the connecting pipe section 7 is connected to the third pipe opening 63, and the anti-siphon pipe 5 is connected to the second pipe opening 62.

[0046] The check valve 4 of the present invention includes a valve body 41, wherein a first opening 42 is formed at one end of the valve body 41, and the other end thereof is a beveled end surface 43, the beveled end surface 43 is elliptical in shape, and a valve cover 44 for opening and closing the second opening 432 is provided on the beveled end surface 43, and the size of the valve cover 44 is adapted to the second opening 432.

[0047] Preferably, a first focus 433 and a second focus 434 are provided at the edge of the second opening 432 of the chamfered end surface 43 , and the distance from the first focus 433 to the first opening 42 is smaller than the distance from the second focus 434 to the first opening 42 .

[0048] Preferably, a line connecting the first focus 433 and the second focus 434 passes through the center of the second opening 432 to form a major axis of the elliptical second opening 432 .

[0049] Preferably, the valve cover 44 fits tightly with the second opening 432, causing the second opening 432 to be closed. At the same time, water flows out through the drain pipe. When the drain pipe stops draining and produces a siphon, a negative pressure is formed due to the siphon phenomenon. The negative pressure generates a force to drive the check valve 4 to open, and the anti-siphon pipe 5 lets air into the drain pipe to destroy the siphon effect of the drain pipe.

[0050] The chamfered end surface 43 of the present invention further includes a sealing portion 431, the valve cover 44 is pivotally connected to the sealing portion 431, and the distance from the sealing portion 431 to the first opening 42 is smaller than the distance from the second opening 432 to the first opening 42;

[0051] Preferably, the valve cover 44 is provided with a counterweight 441 .

[0052] Preferably, the sealing portion 431 and the second opening 432 are both semicircular and are both composed of a circular arc edge and a straight edge. The sealing portion 431 and the second opening 432 share the same straight edge, and the length of the circular arc edge of the sealing portion 431 is greater than the length of the circular arc edge of the second opening 432.

[0053] The sealing portion 431 of the present invention is provided with a fixing portion 45 for connecting with the valve cover 44 on one side close to the drain pipe.

[0054] Preferably, the fixing portion 45 includes a hinge 451 and a shaft 452 rotatably mounted on the hinge 451 , and the shaft 452 is connected to the valve cover 44 .

[0055] Preferably, the shaft 452 is T-shaped, including a crossbar and a vertical bar vertically connected to the crossbar, both ends of the crossbar pass through the through holes of the hinge 451 respectively, and one end of the vertical bar is connected to the valve cover 44.

[0056] The valve body 41 of the present invention is sleeved with a sealing ring 46 on its outer periphery. The sealing ring 46 is in contact with the inner wall of the anti-siphon tube 5 . The anti-siphon tube 5 is plugged into the second pipe opening 62 of the three-way pipe fitting 6 .

[0057] Preferably, a sealing ring 46 is sleeved on the outer periphery of the valve body 41, which, on the one hand, fixes the check valve 4 in the anti-siphon pipe 5, and on the other hand, the good sealing performance of the sealing ring 46 ensures that the water flow does not enter the anti-siphon pipe 5 during the drainage process; the valve cover 44 is provided with a counterweight 441 to ensure that during the drainage process, the combined force of the force generated by the water flow and the component force of the gravity of the counterweight 441 drives the valve cover 44 to move toward the second opening 432 until the valve cover 44 and the second opening 432 are tightly fitted to block the second opening 432, and the water flows out through the drain pipe.

[0058] A washing machine comprises a housing 1, an outer drum and a drainage pump.

[0059] One end of the anti-siphon pipe 5 of the anti-siphon structure is connected to the outer cylinder, and the other end is connected to the drain pipe.

[0060] One end of the drainage pipe passes through the drainage port of the box body 1 and is connected to the drainage pump, and the drainage pump is connected to the outer cylinder through a drainage hose.

[0061] Preferably, the inner cylinder is installed in the outer cylinder, the inner cylinder and the outer cylinder are installed in the box body 1, and the outer cylinder is suspended inside the box body 1 by a hanging spring, one end of the drain pipe is connected to the drain port of the box body 1, and the other end of the drain pipe is connected to the sewage outlet outside the box body 1;

[0062] Preferably, the outer drum is provided with a first air port, and the drain pump is connected to the first air port of the outer drum through a drain hose; a water inlet pipe is also provided on the upper part of the outer drum, the water inlet pipe is connected to the detergent box, and the water inlet valve feeds water into the detergent box, driving the detergent into the outer drum through the water inlet pipe.

[0063] A second air port is also provided on the top of the outer tube, and the anti-siphon tube 5 is connected to the second air port of the outer tube.

[0064] The connection between the anti-siphon pipe 5 and the outer cylinder of the present invention is located above the water level threshold of the outer cylinder, so as to prevent water from flowing out of the anti-siphon pipe 5 during drainage.

[0065] The connection point between the anti-siphon pipe 5 and the drain pipe of the present invention is located above the water outlet of the outer cylinder.

[0066] The connection point between the anti-siphon pipe 5 and the drain pipe of the present invention is located on the water inlet pipe section 2 of the drain pipe or on a partial connecting pipe section 7 of the drain pipe.

[0067] As another embodiment of the present invention, the water inlet pipe section 2 and part of the connecting pipe section 7 of the drainage pipe can be arranged inside the box body 1.

[0068] Working principle: water from the outer cylinder enters the drain pipe along the drain hose through the first air port, and the drain pump is started. During the process in which the drain pump provides a force to drive the water to be discharged from the drain pipe, the water flow provides a force to make the valve cover 44 fit tightly with the second opening 432, closing the second opening 432, so that the water can be discharged from the water outlet of the drainage channel; the drain pump is stopped, and a negative pressure is formed in the drain pipe due to the siphon phenomenon. The negative pressure generates a force to drive the valve cover 44 to open, so that the passage between the anti-siphon pipe 5 and the drain pipe is connected, and air enters the drainage channel to destroy the siphon phenomenon in the drainage channel.

[0069] The above description is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technician familiar with this patent can make some changes or modifications to equivalent embodiments of equivalent changes by using the technical content suggested above without departing from the scope of the technical solution of the present invention. The implementation scheme in the above embodiment can also be further combined or replaced. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the scope of the solution of the present invention.

Claims

1. An anti-siphon structure, comprising a drain pipe and an anti-siphon pipe (5), wherein the anti-siphon pipe (5) is a side branch of the drain pipe and is connected to the drain pipe, characterized in that: It also includes a check valve (4) installed in the anti-siphon pipe (5), which is used to open the anti-siphon pipe (5) to allow air to enter the drain pipe when the drain pipe stops draining and generates a siphon, thereby destroying the siphon effect of the drain pipe.

2. The anti-siphon structure according to claim 1, characterized in that: The drainage pipe comprises an inlet pipe section (2), an outlet pipe section (3), and a connecting pipe section (7) connecting the inlet pipe section (2) and the outlet pipe section (3); The water inlet pipe section (2) extends upwards and is connected to one end of the connecting pipe section (7), the other end of the connecting pipe section (7) is connected to the water outlet pipe section (3), and the water outlet pipe section (3) extends downwards; The anti-siphon pipe (5) is arranged beside the water inlet pipe section (3) and is connected to the drainage pipe through a three-way pipe fitting (6); Preferably, the three-way pipe fitting (6) comprises a first pipe opening (61), a second pipe opening (62) and a third pipe opening (63), the water inlet pipe section (2) is connected to the first pipe opening (61), the connecting pipe section (7) is connected to the third pipe opening (63), and the anti-siphon pipe (5) is connected to the second pipe opening (62).

3. The anti-siphon structure according to claim 1, characterized in that: The check valve (4) comprises a valve body (41), wherein a first opening (42) is formed at one end of the valve body (41), and the other end opposite thereto is a beveled end surface (43), the beveled end surface (43) is elliptical in shape, and a valve cover (44) for opening a second opening (432) and for opening and closing the second opening (432) is provided on the beveled end surface (43).

4. The anti-siphon structure according to claim 3, characterized in that: The chamfered end surface (43) further comprises a sealing portion (431), the valve cover (44) being pivotally connected to the sealing portion (431), and the distance from the sealing portion (431) to the first opening (42) being smaller than the distance from the second opening (432) to the first opening (42); Preferably, the valve cover (44) is provided with a counterweight (441).

5. The anti-siphon structure according to claim 4, characterized in that: A fixing portion (45) for connecting to the valve cover (44) is provided on one side of the sealing portion (431) close to the drain pipe.

6. The anti-siphon structure according to claim 4, characterized in that: A sealing ring (46) is sleeved on the outer periphery of the valve body (41), the sealing ring (46) is in contact with the inner wall of the anti-siphon tube (5), and the anti-siphon tube (5) is plugged into the second pipe opening of the three-way pipe fitting.

7. A washing machine, characterized in that: The anti-siphon structure according to any one of claims 1 to 6 is characterized in that it comprises a box body, an outer cylinder, and a drainage pump; One end of the anti-siphon pipe (5) of the anti-siphon structure is connected to the outer cylinder, and the other end is connected to the drain pipe; One end of the drainage pipe passes through the drainage port of the box body (1) and is connected to a drainage pump, and the drainage pump is connected to the outer cylinder via a drainage hose.

8. The washing machine according to claim 7, characterized in that: The connection point between the anti-siphon pipe (5) and the outer cylinder is located above the water level threshold of the outer cylinder.

9. The washing machine according to claim 8, characterized in that: The connection point between the anti-siphon pipe (5) and the drainage pipe is located above the water outlet of the outer cylinder.

10. The washing machine according to claim 9, characterized in that: The connection point between the anti-siphon pipe (5) and the drainage pipe is located on the water inlet pipe section (2) of the drainage pipe or on a part of the connection pipe section (7) of the drainage pipe.

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