Anti-siphon water device and toilet

Abstract

The application discloses a kind of anti-suck water device and closestool, wherein the anti-suck water device includes shell and valve body, shell has cavity, shell is equipped with the water outlet and air inlet that communicate cavity, the bottom end of cavity is equipped with boss, the top end of boss is higher than water outlet, boss is equipped with water inlet, the water outlet end of water inlet penetrates the top end of boss, the top end of boss lateral wall is equipped with gap, valve body is slidably installed in cavity, valve body is equipped with partition structure, when water inlet fills water, water can push valve body and slide upwards to first position, so that partition structure separates air inlet and cavity, when valve body slides downwards to second position, the top end of boss abuts on the bottom end of partition structure or the bottom end of valve body, so that partition structure is located above water outlet.The anti-suck water device and closestool of the application can reduce the scale of partition structure, so that the effect of partition structure separating air inlet and cavity is better, in addition, the generation of whistle sound is reduced, and user experience is improved.

Description

Technical Field

[0001] This invention relates to the field of bathroom technology, and in particular to an anti-backflow device and a toilet. Background Technology

[0002] Toilets are typically connected to the municipal water supply network. When the water supply is interrupted, negative pressure is generated. To prevent water in the toilet from being drawn back into the municipal water supply network due to the negative pressure and thus contaminating the water in the municipal water supply network, relevant technologies will install an anti-backflow device between the toilet and the municipal water supply network.

[0003] Existing anti-backflow devices generally include a housing with a cavity. The housing has an inlet, an outlet, and an air inlet connecting to the cavity. The inlet connects to the municipal water supply, and the outlet connects to the toilet's water supply line. A valve body with a partition structure slides within the cavity. When the municipal water supply is normal, the valve body slides to isolate the air inlet from the cavity. When the municipal water supply is interrupted, creating negative pressure, the valve body slides to release the partition structure, allowing the inlet and air inlet to connect. This allows the system to directly draw in atmospheric air when negative pressure is generated, preventing contaminated water from being drawn back into the toilet from the outlet. However, when not in use, water may remain in the cavity below the outlet. The partition structure will be submerged in this residual water, leading to scale buildup and reducing its effectiveness in isolating the air inlet from the cavity. In addition, when the tap water network is shut off and negative pressure is generated, the valve body is prone to sliding to fit the water inlet under the action of negative pressure, which can easily produce a sharp whistling sound and result in a poor user experience. Summary of the Invention

[0004] This invention aims to at least solve one of the technical problems existing in the prior art. To this end, this invention proposes an anti-backflow water device that can reduce scale formation in the partition structure, thereby improving the effectiveness of the partition structure in separating the air inlet from the cavity. In addition, it can reduce whistling noise and improve the user experience.

[0005] The present invention also proposes a toilet having the above-mentioned anti-backflow device.

[0006] According to a first aspect of the present invention, an anti-backflow water device includes a housing and a valve body. The housing has a cavity, and the housing is provided with a water outlet and an air inlet communicating with the cavity. A boss is provided at the bottom end of the cavity, and the top end of the boss is higher than the water outlet. The boss is provided with an water inlet, and the water outlet end of the water inlet passes through the top end of the boss. A notch is provided at the top end of the side wall of the boss. The valve body is slidably installed in the cavity. The valve body is provided with a partition structure. The valve body has a first position and a second position during sliding. When water enters through the water inlet, the water can push the valve body upward to the first position, thereby causing the partition structure to isolate the air inlet from the cavity. When the valve body slides downward to the second position, the top end of the boss abuts against the bottom end of the partition structure or the bottom end of the valve body, so that the partition structure is located above the water outlet.

[0007] The anti-backflow water device according to embodiments of the present invention has at least the following beneficial effects:

[0008] The anti-backflow device of this invention has an inlet connected to an external water supply network, an outlet connected to the toilet's inlet pipe, and an air inlet connected to the outside. When the water supply network is supplying water normally, the water entering through the inlet pushes the valve body upward to the first position, causing the valve body's isolation structure to separate the air inlet from the cavity, preventing water from being discharged through the air inlet. When the water supply network is shut off, the valve body slides downward to the second position under its own weight, causing the valve body's isolation structure to release the separation between the air inlet and the cavity. In this case, the inlet and air inlet are connected, and when the water supply network generates negative pressure, it will directly draw in the outside atmosphere instead of drawing water back into the toilet from the outlet. According to the anti-backflow water device of the present invention, when the valve body slides downwards until the top of the boss abuts against the bottom of the partition structure or the bottom of the valve body, since the top of the boss is higher than the water outlet, the partition structure can always be positioned above the water outlet. Therefore, even if some water remains in the cavity of the housing that has not been completely drained through the water outlet, the partition structure is less likely to adhere to this residual water, thereby reducing scale buildup on the partition structure and improving its effectiveness in isolating the air inlet from the cavity. Furthermore, compared to air entering the water inlet through the tiny gap between the top of the boss and the bottom of the valve body, in this invention, because the top of the boss sidewall has a notch, air can enter the water inlet more smoothly through the notch, thereby reducing whistling noise and improving the user experience.

[0009] According to some embodiments of the present invention, the water inlet is located at the bottom end of the cavity, the air inlet is located at the top end of the cavity, the valve body is slidably installed in the cavity, and the valve body has a first position during the sliding process. When water enters through the water inlet, the water can push the valve body upward to the first position, thereby causing the partition structure to separate the air inlet from the cavity.

[0010] According to some embodiments of the present invention, a boss is provided in the cavity, the top of the boss is higher than the water outlet, and the valve body has a second position during sliding. When the valve body slides downward to the second position, the top of the boss abuts against the bottom of the partition structure.

[0011] According to some embodiments of the present invention, the boss is disposed at the bottom end of the cavity, and the water inlet is vertically disposed on the boss.

[0012] According to some embodiments of the present invention, the top end of the cavity is provided with a guide channel communicating with the air inlet, the valve body is slidably installed in the guide channel, and the partition structure is provided on the outer side wall of the valve body along the circumference of the valve body. When the valve body slides to the first position, the top end of the partition structure abuts against the circumference of the bottom end of the guide channel.

[0013] According to some embodiments of the present invention, a sealing ring is provided at the top of the partition structure along the circumference of the partition structure, and when the valve body slides to the first position, the sealing ring abuts against the circumference of the bottom end of the guide channel.

[0014] According to some embodiments of the present invention, a gap is provided between the outer wall of the valve body and the inner wall of the guide channel.

[0015] According to some embodiments of the present invention, the valve body is provided with a valve cavity, the top end of the valve cavity is provided with a first through hole, the bottom end of the valve cavity is provided with a second through hole, and a valve core that can slide up and down is provided inside the valve cavity. The valve core blocks the second through hole. When water enters through the inlet, the water can push the valve core to slide upward and release the blockage of the second through hole. The thrust required for the water to push the valve core to slide upward is greater than the thrust required for the water to push the valve body to slide upward.

[0016] According to some embodiments of the present invention, the side wall of the valve body is provided with an opening communicating with the valve cavity, and the top end of the valve core is higher than the bottom end of the opening.

[0017] According to some embodiments of the present invention, the housing is provided with a pressure relief port communicating with the guide channel, and the pressure relief port is lower than the air inlet.

[0018] According to some embodiments of the present invention, the housing includes a first sub-shell and a second sub-shell. The first sub-shell is provided with a first snap-fit ​​portion. The second sub-shell abuts against the first sub-shell and is rotatable relative to the first sub-shell. The second sub-shell and the first sub-shell enclose each other to form the cavity. The second sub-shell is provided with a second snap-fit ​​portion. During the relative rotation of the second sub-shell and the first sub-shell, the first snap-fit ​​portion and the second snap-fit ​​portion can snap into or separate from each other.

[0019] A toilet according to a second aspect of the present invention includes the anti-backflow device described in the above embodiments.

[0020] The toilet according to embodiments of the present invention has at least the following beneficial effects:

[0021] In the anti-backflow device of the first embodiment, when the valve body slides downwards until the top of the boss abuts against the bottom of the partition structure or the bottom of the valve body, the top of the boss is higher than the water outlet, ensuring that the partition structure remains above the water outlet. Therefore, even if some water remains in the cavity of the housing that has not been completely drained through the water outlet, the partition structure is less likely to adhere to this residual water, thus reducing scale buildup and improving the partition structure's effectiveness in isolating the air inlet from the cavity. Furthermore, compared to air entering the water inlet through the tiny gap between the top of the boss and the bottom of the valve body, the notch at the top of the boss's sidewall allows air to enter the water inlet more smoothly, reducing whistling noise and improving the user experience.

[0022] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. Attached Figure Description

[0023] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0024] Figure 1 This is a schematic diagram of the overall structure according to an embodiment of the present invention;

[0025] Figure 2 for Figure 1 A sectional view;

[0026] Figure 3 This is a schematic diagram of the inlet when water is being introduced normally.

[0027] Figure 4 This is a schematic diagram showing the negative pressure generated at the water inlet.

[0028] Figure 5 A schematic diagram showing the pressure relief port during pressure release;

[0029] Figure 6 This is a schematic diagram of the valve body.

[0030] Icon labels:

[0031] Shell 100; cavity 101; water inlet 102; water outlet 103; air inlet 104; boss 105; notch 106; guide channel 107; pressure relief port 108; first shell 109; second shell 110; first snap-fit ​​part 111; second snap-fit ​​part 112; annular protrusion 113;

[0032] Valve body 200; isolation structure 201; annular guide part 202; vent 203; sealing ring 204; valve cavity 205; first through hole 206; second through hole 207; valve core 208; opening 209; sealing groove 210; sealing ring 211; guide rod 212; return spring 213. Detailed Implementation

[0033] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0034] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, inside, outside, top, bottom, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0035] In the description of this invention, "multiple" refers to two or more. The use of "first" and "second" is for distinguishing technical features only and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features or their sequential relationship.

[0036] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0037] Toilets are typically connected to the municipal water supply network. When the water supply is interrupted, a negative pressure is created within the network. This negative pressure can draw contaminated water from the toilet back into the water supply network, affecting the original water quality. This phenomenon is called a backflow prevention system. To prevent backflow, anti-backflow devices are installed between the toilet and the municipal water supply network.

[0038] Existing anti-backflow devices generally include a housing with a cavity. The housing has an inlet, an outlet, and an air inlet that connect to the cavity. The inlet connects to the municipal water supply network, the outlet connects to the toilet's water inlet pipe, and the air inlet connects to the outside. A valve body with a partition structure is slidably installed inside the cavity. When the municipal water supply network is supplying water normally, the valve body slides to the point where the partition structure isolates the air inlet from the cavity. In this case, the inlet and outlet are connected, allowing for normal water supply. When the municipal water supply network stops supplying water and negative pressure is generated, the valve body slides to the point where the partition structure releases the isolation between the air inlet and the cavity. In this case, the inlet and air inlet are connected, and when negative pressure is generated in the municipal water supply network, the air is directly drawn in instead of being drawn back into the toilet from the outlet. However, existing anti-backflow devices have the following drawbacks: Since the outlet may be located on one side of the cavity rather than the bottom, some water may remain inside the cavity when not in use. This water cannot drain out through the outlet, and the partition structure will be soaked in the residual water, leading to scale buildup and reduced effectiveness in separating the air inlet from the cavity. Furthermore, when the water supply is interrupted, creating negative pressure, the valve body may slide to fit the inlet under the pressure, producing a sharp whistling sound and resulting in a poor user experience.

[0039] The following is for reference. Figures 1 to 6 A backflow prevention device and a toilet are described according to embodiments of the present invention.

[0040] like Figures 1 to 6 As shown, the anti-backflow water device according to a first aspect embodiment of the present invention includes a housing 100 and a valve body 200.

[0041] The housing 100 has a cavity 101. The housing 100 is provided with a water inlet 102, a water outlet 103 and an air inlet 104. The water inlet 102, the water outlet 103 and the air inlet 104 are all connected to the cavity 101. The valve body 200 can be slidably installed in the cavity 101. The valve body 200 is provided with a partition structure 201. During the sliding process of the valve body 200, the partition structure 201 can isolate or connect the air inlet 104 with the cavity 101. The partition structure 201 is located above the water outlet 103.

[0042] In this embodiment of the invention, the anti-backflow device has an inlet 102 connected to an external water supply network, an outlet 103 connected to the toilet's water inlet, and an air inlet 104 connected to the outside. When the water supply network is supplying water normally, the sliding valve body 200 isolates the air inlet 104 from the cavity 101 through its isolation structure 201, preventing water from being discharged through the air inlet 104. When the water supply network is shut off, the sliding valve body 200 releases the isolation structure 201 from the air inlet 104 and the cavity 101. In this case, the inlet 102 and the air inlet 104 are connected, and when the water supply network generates negative pressure, it will directly draw in the outside atmosphere instead of backflowing contaminated water into the toilet through the outlet 103.

[0043] According to the anti-backflow water device of the present invention, since the partition structure 201 is always located above the water outlet 103, even if some water that has not been drained through the water outlet 103 remains in the cavity 101 of the housing 100, the partition structure 201 is not prone to adhering to this residual water, thereby reducing the formation of scale on the partition structure 201, and thus making the partition structure 201 more effective in separating the air inlet 104 from the cavity 101.

[0044] It should be noted that in this embodiment, since the partition structure 201 separates the air inlet 104 from the cavity 101, during the sliding process of the valve body 200, as long as the partition structure 201 of the valve body 200 is always located above the water outlet 103, the formation of scale on the partition structure 201 of the valve body 200 can be reduced, thereby improving the effectiveness of the partition structure 201 in separating the air inlet 104 from the cavity 101. The position of the valve body 200 is not limited; during the sliding process of the valve body 200, the bottom end of the valve body 200 can be located either below or above the water outlet 103.

[0045] In some embodiments of the present invention, such as Figure 3 and Figure 5 As shown, the water inlet 102 is located at the bottom of the cavity 101, the air inlet 104 is located at the top of the cavity 101, and the valve body 200 is slidably installed in the cavity 101. During the sliding process, the valve body 200 has a first position. When water enters through the water inlet 102, the water can push the valve body 200 to slide upward to the first position, thereby separating the air inlet 104 from the cavity 101 by the partition structure 201.

[0046] When water enters through inlet 102, that is, when the tap water network is supplying water normally, the water can push the valve body 200 to slide upward to the first position, thereby isolating the air inlet 104 and the cavity 101 through the partition structure 201. In this case, the inlet 102 and the outlet 103 are connected, thus supplying water to the toilet normally, while preventing water from being discharged from the air inlet 104. When not in use or when the tap water network is shut off and negative pressure is generated, the valve body 200 slides downward under its own weight, thereby causing the partition structure 201 to descend. The partition structure 201 then releases the isolation between the air inlet 104 and the cavity 101. In this case, the inlet 102 and the air inlet 104 are connected, so when the tap water network generates negative pressure, it will directly draw in the outside atmosphere, instead of drawing back contaminated water into the toilet through the outlet 103. In this embodiment, the valve body 200 is slidably installed in the cavity 101. The valve body 200 can be controlled to slide up and down by the thrust of water and its own gravity, without the need to set up a drive mechanism to control the valve body 200 to slide up and down. The structure is simple, easy to use, has a low probability of failure, and is ingeniously designed.

[0047] It should be noted that the overall weight of the valve body 200 needs to be designed according to the thrust of the water entering through the inlet 102, so that the water entering through the inlet 102 can push the valve body 200 to slide upward.

[0048] In a further embodiment of the present invention, such as Figures 2 to 5 As shown, a boss 105 is provided inside the cavity 101. The top of the boss 105 is higher than the outlet 103. The valve body 200 has a second position during sliding. When the valve body 200 slides downward to the second position, the top of the boss 105 abuts against the bottom of the partition structure 201. When the valve body 200 slides downward to the second position under its own gravity, the top of the boss 105 abuts against the bottom of the partition structure 201. Since the top of the boss 105 is higher than the outlet 103, the partition structure 201 can always be kept above the outlet 103, thereby reducing the formation of scale in the partition structure 201.

[0049] It should be noted that the boss 105 can be located at the bottom of the cavity 101 or on the inner wall of the cavity 101, as long as the top of the boss 105 is higher than the outlet 103. It is understood that the second position is lower than the first position so that when the valve body 200 slides downwards to the second position, the partition structure 201 can release the separation between the air inlet 104 and the cavity 101. Furthermore, when the valve body 200 slides downwards to the second position, the top of the boss 105 can also abut against the bottom of the valve body 200, as long as the partition structure 201 is higher than the outlet 103.

[0050] Furthermore, such as Figures 2 to 5As shown, a boss 105 is located at the bottom of the cavity 101, and a water inlet 102 is vertically mounted on the boss 105. A notch 106 is provided at the top of the side wall of the boss 105. When the valve body 200 slides downwards to the second position, causing the top of the boss 105 to abut against the bottom of the partition structure 201, the water inlet 102 can communicate with the air inlet 104 through the notch 106. When the water inlet 102 draws in outside air through the air inlet 104, the air enters the water inlet 102 through the notch 106. In this embodiment, the notch 106 at the top of the side wall of the boss 105 allows air to enter the water inlet 102 more smoothly and then into the water supply network, thereby reducing whistling noise and improving the user experience.

[0051] It is understandable that the number of notches 106 can be one or more. When there is one or more notches 106, they can be arranged circumferentially along the inlet 102. It is also understandable that if notches 106 are not provided, when the top of the boss 105 abuts against the bottom of the partition structure 201, the gap between them is very small. Consequently, when the high-speed flowing gas generated by the negative pressure passes through the tiny gap, a whistling sound, i.e., a sharp noise, will be produced, affecting the user experience. In this embodiment, providing notches 106 can effectively solve this problem.

[0052] Furthermore, such as Figures 2 to 5 As shown, the outlet 103 can be located on one side of the boss 105, and the notch 106 can be located on the side of the boss 105 away from the outlet 103. With this arrangement, when the water supply network generates negative pressure due to water outage, the amount of water in the outlet 103 entering the inlet 102 through the notch 106 can be reduced.

[0053] Furthermore, such as Figures 2 to 6 As shown, the bottom end of the valve body 200 is provided with an annular guide portion 202, and the side wall of the annular guide portion 202 is provided with a vent 203. When the valve body 200 slides to the second position, the annular guide portion 202 is inserted into the water inlet 102, and the notch 106 is located outside the vent 203. When the valve body 200 slides downward to the partition structure 201 near the boss 105, the annular guide portion 202 is inserted into the water inlet 102. Through the cooperation between the annular guide portion 202 and the water inlet 102, the sliding of the valve body 200 can be guided, thereby reducing the vibration or swaying of the valve body 200. This not only makes the sliding of the valve body 200 more precise, but also prevents the valve body 200 from being damaged due to excessive vibration or swaying. The side wall of the annular guide portion 202 is provided with a vent 203, and the notch 106 is located outside the vent 203, so that the water inlet 102 can communicate with the inner cavity of the annular guide portion 202. The inner cavity of the annular guide portion 202 is then connected to the notch 106 through the vent 203, so that the water inlet 102 can be indirectly connected to the notch 106.

[0054] In some embodiments of the present invention, such as Figures 2 to 5 As shown, the top of the cavity 101 is provided with a guide channel 107 that connects to the air inlet 104. The valve body 200 is slidably installed in the guide channel 107. The partition structure 201 is provided on the outer side wall of the valve body 200 along the circumference of the valve body 200. When the valve body 200 slides to the first position, the top of the partition structure 201 abuts against the circumference of the bottom end of the guide channel 107. Specifically, the lower end of the guide channel 107 can be vertically positioned, and the valve body 200 is slidably mounted on the lower end of the guide channel 107. The housing 100 can have a horizontal abutment surface on the periphery of the bottom end of the guide channel 107. The partition structure 201 is located on the outer wall of the valve body 200. The partition structure 201 is similar to a flange. When the valve body 200 slides upward to the first position, the top end of the partition structure 201 abuts against the abutment surface. Through the cooperation between the partition structure 201 and the abutment surface, the guide channel 107 can be blocked, thereby isolating the air inlet 104 from the cavity 101. The guide channel 107 not only allows for the sliding mounting of the valve body 200 but also allows for air passage, serving two purposes in one unit. The structure is simpler and more practical.

[0055] It is understandable that the partition structure 201 can also be located at other positions on the valve body 200, such as at the top of the valve body 200. The partition structure 201 only needs to isolate the air inlet 104 from the cavity 101 when the valve body 200 slides upwards to the first position. The valve body 200 can also be guided to slide up and down in other ways. For example, a guide rail can be vertically installed inside the cavity 101, and a slider can be installed on the valve body 200 and connected to the guide rail via the slider.

[0056] In a further embodiment of the present invention, such as Figures 2 to 6 As shown, a sealing ring 204 is provided at the top of the partition structure 201 along its circumference. When the valve body 200 slides to the first position, the sealing ring 204 abuts against the circumferential side of the bottom end of the guide channel 107. The sealing ring 204 improves the sealing effect between the partition structure 201 and the contact surface, thereby improving the sealing effect of the guide channel 107 and the isolation effect between the air inlet 104 and the cavity 101.

[0057] Furthermore, the valve body 200 may have an annular recess on the outer wall above the partition structure 201. The annular recess surrounds the valve body 200, and the sealing ring 204 can be installed in the annular recess, thereby making the installation of the sealing ring 204 more secure.

[0058] Furthermore, such as Figures 2 to 5As shown, the housing 100 has an annular protrusion 113 on the periphery of the bottom end of the guide channel 107. The sealing ring 204 is elastic and can deform. When the sealing ring 204 abuts against the periphery of the bottom end of the guide channel 107, the annular protrusion 113 can cause the sealing ring 204 to be recessed, thus the annular protrusion 113 sinks into the sealing ring 204. By setting the annular protrusion 113, the effect of the partition structure 201 in blocking the guide channel 107 is better, thereby improving the effect of isolating the air inlet 104 from the cavity 101.

[0059] In some embodiments of the present invention, such as Figures 2 to 5 As shown, a gap is provided between the outer wall of the valve body 200 and the inner wall of the guide channel 107. Due to the gap between the outer wall of the valve body 200 and the inner wall of the guide channel 107, even if some water adheres to the outer wall of the valve body 200 due to water splashing, this water can quickly flow downward through the gap and leave the valve body 200, thereby preventing the water adhering to the outer wall of the valve body 200 from slowly flowing onto the partition structure 201 and causing scale buildup.

[0060] Furthermore, the gap between the outer wall of the valve body 200 and the inner wall of the guide channel 107 is greater than 1 mm. This further improves the downward flow of water on the outer wall of the valve body 200.

[0061] In some embodiments of the present invention, such as Figures 2 to 6 As shown, the valve body 200 is provided with a valve cavity 205. The top end of the valve cavity 205 is provided with a first through hole 206, and the bottom end of the valve cavity 205 is provided with a second through hole 207. The valve cavity 205 is provided with a valve core 208 that can slide up and down. The valve core 208 blocks the second through hole 207. When water enters through the inlet 102, the water can push the valve core 208 to slide upward and release the blockage of the second through hole 207. The thrust required for the water to push the valve core 208 to slide upward is greater than the thrust required for the water to push the valve body 200 to slide upward.

[0062] When water enters through inlet 102 normally, the water pushes valve body 200 to slide upward, causing isolation structure 201 to block guide channel 107. This prevents water from being discharged to the outside through guide channel 107 and air inlet 104. At the same time, when water is entering normally, the thrust exerted by water on valve core 208 is less than the resistance encountered when valve core 208 slides upward. Valve core 208 will not slide upward but will continue to block second through hole 207. This prevents water from entering guide channel 107 through second through hole 207, the outside of valve core 208 and first through hole 206, and then being discharged to the outside through air inlet 104. When the inlet pressure of the water inlet 102 is too high, the thrust exerted by the water on the valve core 208 is greater than the resistance encountered when the valve core 208 slides upward, thereby pushing the valve core 208 to slide upward. The valve core 208 can then release the blockage of the second through hole 207, allowing some water to enter the guide channel 107 through the second through hole 207, the outside of the valve core 208, and the first through hole 206. The water then flows out through the air inlet 104 or other outlets connected to the guide channel 107, thereby depressurizing the water in the cavity 101 and preventing excessive pressure caused by the water in the cavity 101 from damaging the anti-backflow water device of the present invention.

[0063] Furthermore, the top of the inner wall of the second through hole 207 is provided with a first chamfer along the circumference, and the bottom of the outer wall of the valve core 208 is provided with a corresponding second chamfer, so that the bottom end of the valve core 208 can partially extend into the second through hole 207, while the surface of the second chamfer fits into the surface of the first chamfer. This arrangement makes the valve core 208 more effective in blocking the second through hole 207.

[0064] In addition, a sealing groove 210 can be provided above the second through hole 207 in the valve body 200. During the downward sliding process of the valve core 208, it can be inserted into the sealing groove 210. The outer side wall of the valve core 208 can fit against the inner side wall of the sealing groove 210, thereby making the valve core 208 better at sealing the second through hole 207.

[0065] Furthermore, a sealing ring 211 can be fitted onto the outer wall of the valve core 208. When the valve core 208 is inserted into the sealing groove 210, the sealing ring 211 abuts against the inner wall of the sealing groove 210, thereby improving the sealing effect of the valve core 208 on the second through hole 207. It should be noted that the outer wall of the valve core 208 can be provided with an annular groove along the circumference, and the sealing ring 211 is fitted into the annular groove, thereby making the installation of the sealing ring 211 more secure.

[0066] In a further embodiment of the present invention, such as Figure 6As shown, a guide hole is vertically provided at the top of the valve body 200, and a guide rod 212 is vertically provided at the top of the valve core 208. The guide rod 212 slides through the guide hole. The guide hole and guide rod 212 can guide the valve core 208, making the up-and-down sliding of the valve core 208 more precise and preventing the valve core 208 from deviating during sliding.

[0067] In a further embodiment of the present invention, such as Figure 6 As shown, a return spring 213 is sleeved on the guide rod 212. The bottom end of the return spring 213 abuts against or connects to the top end of the valve core 208, and the top end of the return spring 213 abuts against or connects to the top end inside the valve cavity 205. The return spring 213 applies a greater pressure to the valve core 208, which not only improves the sealing effect of the valve core 208 on the second through hole 207 but also increases the resistance encountered when the valve core 208 slides upward. This results in a greater thrust required for the water to push the valve core 208 upward than the thrust required for the water to push the valve body 200 upward, thereby achieving the pressure relief function of the valve body 200.

[0068] In some embodiments of the present invention, such as Figures 2 to 6 As shown, the side wall of the valve body 200 has an opening 209 that connects to the valve cavity 205, and the top of the valve core 208 is higher than the bottom of the opening 209. First, when the valve body 200 slides upward to the first position, that is, when the partition structure 201 abuts against the periphery of the bottom of the guide channel 107, if the water pressure at the inlet 102 is too high, the water will push the valve core 208 upward to the same height as the opening 209. The excess water that needs to be discharged can pass through the opening 209, and then the water that needs to be discharged can easily pass through the first through hole 206. Second, when the tap water network is shut off and negative pressure occurs, the opening 209 can connect the cavity 101 and the valve cavity 205 of the valve body 200, so that the air entering from the air inlet 104 can enter the cavity 101 through the first through hole 206 and the opening 209 in sequence, and finally enter the tap water network through the water inlet 102. In addition, an opening 209 is provided to facilitate the rapid flow of water from the valve core 208 through the opening 209. Furthermore, the top of the valve core 208 is higher than the bottom of the opening 209, which further facilitates the rapid flow of water from the valve core 208 through the opening 209. This can prevent scale buildup in the valve core 208 and reduce its sealing effect on the second through hole 207.

[0069] It should be noted that in some other embodiments, the opening 209 may not be provided. In this case, a gap may be reserved between the outer wall of the valve core 208 and the inner wall of the valve cavity 205 to allow water that needs to be drained to pass through. In addition, since a gap is also reserved between the outer wall of the valve body 200 and the inner wall of the guide channel 107, when the partition structure 201 slides downward to separate from the periphery of the bottom end of the guide channel 107, the air entering through the air inlet 104 can enter the cavity 101 through the gap between the outer wall of the valve body 200 and the inner wall of the guide channel 107, and finally enter the tap water network through the water inlet 102.

[0070] In some embodiments of the present invention, such as Figures 2 to 5 As shown, the housing 100 is provided with a pressure relief port 108 that connects to the guide channel 107, and the pressure relief port 108 is lower than the air inlet 104. By providing a pressure relief port 108 and making it lower than the air inlet 104, when the water pressure in the cavity 101 is too high, the water that needs to be released is discharged from the pressure relief port 108 instead of from the air inlet 104, thereby preventing the water that needs to be released from affecting the air inlet 104.

[0071] In some embodiments of the present invention, such as Figures 1 to 5 As shown, the housing 100 includes a first sub-shell 109 and a second sub-shell 110, which are detachably connected. The second sub-shell 110 and the first sub-shell 109 enclose a cavity 101. The housing 100 is designed as a detachable structure, which makes it more convenient to replace, clean, or repair the components inside the cavity 101. For example, the partition structure 201 can be cleaned regularly to remove scale, thereby further improving the effectiveness of the partition structure 201 in separating the air inlet 104 from the cavity 101.

[0072] In some embodiments of the present invention, such as Figure 1As shown, the first housing 109 is provided with a first engaging portion 111, and the second housing 110 abuts against the first housing 109 and can rotate relative to the first housing 109. The second housing 110 is provided with a second engaging portion 112. During the relative rotation of the second housing 110 and the first housing 109, the first engaging portion 111 and the second engaging portion 112 can engage or disengage with each other. When it is necessary to connect the first housing 109 and the second housing 110, the first housing 109 and the second housing 110 are brought into contact with each other, and then the first housing 109 and the second housing 110 are rotated relative to each other in a set direction. This will engage the first engaging portion 111 and the second engaging portion 112, thereby achieving the connection between the first housing 109 and the second housing 110. When it is necessary to separate the first housing 109 and the second housing 110, the first housing 109 and the second housing 110 are rotated relative to each other in the opposite direction of the set direction. The structure is simple and easy to assemble and disassemble.

[0073] It should be noted that there may be one or more first snap-fit ​​parts 111, and correspondingly, there may also be one or more second snap-fit ​​parts 112. Furthermore, the first housing 109 and the second housing 110 can also be connected in other ways, such as by bolts or threads. The first snap-fit ​​part 111 may have a slot, and the second snap-fit ​​part 112 may engage with the slot; alternatively, the second snap-fit ​​part 112 may have a slot, and the first snap-fit ​​part 111 may engage with the slot.

[0074] A toilet according to a second aspect of the present invention includes the anti-backflow device of the first aspect of the present invention described above.

[0075] In this embodiment, the anti-backflow water device of the first aspect embodiment is adopted. Since the partition structure 201 is always located above the water outlet 103, even if some water that has not been drained through the water outlet 103 remains in the cavity 101 of the housing 100, the partition structure 201 is not easy to adhere to this part of the residual water, thereby reducing the formation of scale on the partition structure 201, and thus making the partition structure 201 more effective in separating the air inlet 104 from the cavity 101.

[0076] It is understood that since the toilet adopts all the technical solutions of the anti-backflow device of the first aspect embodiment, it has at least all the beneficial effects brought about by the technical solutions of the first aspect embodiment, which will not be repeated here.

[0077] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. Anti-suckback water device, characterized in that, The utility model relates to a water tank, including: A shell has a cavity, the shell is equipped with the water outlet that communicates with the cavity and the air inlet, the bottom of the cavity is equipped with a boss, the top of the boss is higher than the water outlet, the boss is equipped with the water inlet, the water outlet of the water inlet penetrates the top of the boss, the top of the boss lateral wall is equipped with the gap; The valve body can be slid up and down in the cavity, the valve body is equipped with the partition structure, the valve body has the first position and the second position in the sliding process, when the water inlet fills with water, water can push the valve body to slide up to the first position, and the partition structure is separated from the cavity, when the valve body slides down to the second position, the top of the boss abuts on the bottom of the partition structure or the bottom of the valve body, so that the partition structure is located above the water outlet; The bottom of the valve body is equipped with the annular guide part, the lateral wall of the annular guide part is equipped with the air vent, when the valve body slides to the second position, the annular guide part is inserted in the water inlet, and the gap is located outside the air vent; The top of the cavity is equipped with the guide channel that communicates with the air inlet, the valve body is slidably installed in the guide channel, the partition structure is located on the outer lateral wall of the valve body along the circumference of the valve body, when the valve body slides to the first position, the top of the partition structure abuts on the circumferential side of the bottom of the guide channel; The valve body is equipped with the valve cavity, the top of the valve cavity is equipped with the first through hole, the bottom of the valve cavity is equipped with the second through hole, the valve cavity is equipped with the valve core that can slide up and down, the valve core blocks the second through hole, when the water inlet fills with water, water can push the valve core to slide up to unblock the second through hole, wherein the thrust required for water to push the valve core to slide up is greater than the thrust required for water to push the valve body to slide up; The lateral wall of the valve body is equipped with the opening that communicates with the valve cavity, the top of the valve core is higher than the bottom of the opening; or, the gap is reserved between the outer lateral wall of the valve core and the inner lateral wall of the valve cavity; The gap is used to solve the whistle sound generated by the high-speed flowing gas generated by the negative pressure when the top of the boss abuts on the bottom of the partition structure.

2. The anti-suckback water device of claim 1, wherein The water inlet is vertically arranged in the boss.

3. The anti-suckback water device of claim 1, wherein The top of the partition structure is equipped with the sealing ring along the circumference of the partition structure, when the valve body slides to the first position, the sealing ring abuts on the circumferential side of the bottom of the guide channel.

4. The anti-suckback water device of claim 1, wherein The gap is reserved between the outer lateral wall of the valve body and the inner lateral wall of the guide channel.

5. The anti-suckback water device of claim 1, wherein The shell is equipped with the pressure relief port that communicates with the guide channel, and the pressure relief port is lower than the air inlet.

6. The anti-suckback water device according to claim 1 or 2, characterized by The shell includes: The first sub-shell is equipped with the first clamping part; The second sub-shell abuts on the first sub-shell and can rotate relative to the first sub-shell, the second sub-shell and the first sub-shell enclose the cavity, and the second sub-shell is equipped with the second clamping part; In the process of relative rotation between the second shell and the first shell, the first clamping part and the second clamping part can be clamped with each other or separated.

7. A toilet characterized by The anti-suck-back water device comprises the anti-suck-back water device according to any one of claims 1 to 6.

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