A vacuum disrupter

Abstract

The application provides a vacuum breaker, comprising a shell, a liquid inlet channel, a liquid outlet channel and an air inlet channel are arranged on the shell, a first cavity and a second cavity are arranged in the shell, the liquid inlet channel and the liquid outlet channel are communicated with the first cavity, the air inlet channel is communicated with the second cavity, and a suction channel is further arranged on the shell and communicated with the second cavity and the liquid outlet channel; the first cavity and the second cavity are separated by a partition, a movable sealing assembly is arranged in the second cavity to seal or open the air inlet channel, and the movable sealing assembly is in transmission connection with the partition to drive the movable sealing assembly to seal the air inlet channel. The partition separates the first cavity and the second cavity, liquid cannot enter the second cavity from the first cavity, and when water flows, the partition can also drive the movable sealing assembly to seal the air inlet channel under the drive of water pressure, so that the second cavity forms a sealed cavity, gas cannot enter the second cavity through the suction channel, and the sealing gasket is completely isolated from water.

Description

Technical Field

[0001] This invention relates to the field of bathroom technology, and in particular to a vacuum breaker. Background Technology

[0002] In current water supply and drainage systems, existing vacuum breaker devices primarily rely on gaskets for physical sealing of the siphon inlet. Under actual operating conditions, these gaskets are constantly immersed in water or frequently come into contact with flowing water. Dissolved calcium and magnesium ions, as well as suspended fine impurities, inevitably accumulate on the sealing surface, forming stubborn scale. Over time, this scale not only damages the original microscopic smoothness of the sealing surface and accelerates the aging and hardening of the rubber material, but also leads to insufficient sealing pressure. Ultimately, the sealing function gradually weakens or even completely fails, easily causing valve leakage, dripping, and other adverse operating conditions. Summary of the Invention

[0003] To address the aforementioned problems, the purpose of this invention is to provide a vacuum breaker.

[0004] This invention is implemented using the following method: A vacuum breaker includes a housing, on which a liquid inlet channel, a liquid outlet channel, and an air inlet channel are provided. The housing contains a first cavity and a second cavity. The liquid inlet channel and the liquid outlet channel communicate with the first cavity, and the air inlet channel communicates with the second cavity. The housing also has a suction channel communicating with the second cavity and the liquid outlet channel. The first cavity and the second cavity are isolated by a separator. A movable sealing assembly is provided in the second cavity to seal or open the air inlet channel. The movable sealing assembly is kinetically connected to the separator, and the separator is driven by the liquid inlet channel to drive the movable sealing assembly to seal the air inlet channel. Furthermore, the separator is a flexible component, which is used to deform towards the second cavity under the pressure of the liquid when liquid enters the liquid inlet channel, thereby pushing the movable sealing assembly to seal the air inlet channel; Alternatively, the separator may be a piston, which is driven by liquid pressure to move toward the second cavity when liquid enters the inlet channel, thereby pushing the movable sealing assembly to seal the air inlet channel.

[0005] Furthermore, the movable sealing assembly includes a rod body, one end of which abuts against the separator is provided with a driven part, and the side of the separator that abuts against the driven part is provided with a guide groove. The driven part is sized to match the guide groove, and the driven part is disposed in the guide groove and cooperates with the guide groove to achieve driving and guiding. The movable sealing assembly is also provided with a sealing gasket at the end away from the separator, and the sealing gasket can block the communication port between the air intake channel and the second cavity.

[0006] Furthermore, the movable sealing assembly also includes a reset member for driving the movable sealing assembly to move toward the separator to open the air intake passage.

[0007] Furthermore, the air intake end of the air intake channel is connected to the second cavity, and the air outlet end of the air intake channel is connected to the liquid outlet channel.

[0008] Furthermore, the first cavity is provided with a first liquid inlet and a first liquid outlet. The liquid inlet channel is connected to the first liquid inlet, and the liquid outlet channel is connected to the first liquid outlet. The liquid outlet channel is provided with a narrowed section. The flow cross-sectional area of ​​the narrowed section is smaller than the minimum flow cross-sectional area of ​​the first liquid outlet. The air outlet end of the suction channel is located downstream of the narrowed section.

[0009] Furthermore, the surfaces of the first cavity and the partition are provided with multiple ribs protruding towards the partition, and the multiple ribs are spaced apart from each other to ensure that the first cavity is connected to the liquid inlet channel and the liquid outlet channel respectively.

[0010] Furthermore, the first cavity is provided with a first liquid inlet, the liquid inlet channel is connected to the first liquid inlet, and the first liquid inlet is positioned facing the separator.

[0011] Furthermore, the housing includes a body, a bottom cover, an air inlet pipe, a liquid inlet pipe, and a liquid outlet pipe. The body is fixed on the bottom cover, the second cavity is formed in the body, the first cavity is formed on the bottom cover, the air inlet pipe is fixed to the upper side of the body, and the liquid inlet pipe and the liquid outlet pipe are connected to the bottom cover. After the body and the bottom cover are fixed, the second cavity is located on the upper side of the first cavity.

[0012] Furthermore, the main body has a connecting hole above the second cavity for assembling the air intake pipe, the air intake pipe has an air intake channel, and the air intake pipe also has a guide hole. The movable sealing assembly includes a rod, one end of which, away from the separator, passes through the guide hole, and a gap is provided between the rod and the guide hole. The movable sealing assembly includes a reset member, one end of which is located on the air intake pipe at the end facing the second cavity from the guide hole, and the other end of which is connected to the rod. The main body has a communication port between the connecting hole and the second cavity, the diameter of which is smaller than the diameter of the connecting hole and smaller than the diameter of the sealing gasket of the movable sealing assembly, and the communication port connects to the air intake channel.

[0013] The beneficial effects of this invention are as follows: This invention provides a vacuum breaker, which, compared with the prior art, has at least the following technical effects: 1. By setting a separator to isolate the first chamber and the second chamber, liquid cannot enter the second chamber from the first chamber. Under water flow, the separator drives the movable sealing component to seal the air inlet channel under water pressure, so that the second chamber forms a sealed cavity. Water in the outlet channel cannot enter the second chamber through the air intake channel due to the air pressure balance. The movable sealing component is thus completely isolated from water and does not come into contact with it, avoiding the formation of scale and impurities due to long-term contact with water, which affects the sealing effect and causes leakage.

[0014] 2. The separator is a flexible component (sealing spring gasket) set at the connection between the first cavity and the second cavity. When liquid enters the inlet channel, the flexible component is driven by the liquid pressure to deform towards the second cavity, thereby pushing the movable sealing component to seal the air inlet channel.

[0015] 3. The separator is provided with a guide groove. The driven part matches the size of the guide groove and cooperates to achieve driving and guiding, so that the rod moves stably along its own axis without radial offset or tilting, which improves the reliability of sealing and the consistency of operation.

[0016] 4. The automatic return to its original position after water supply is interrupted is achieved by using the reset component, ensuring that the device can be restored to the standby state that can break the siphon in a timely manner after the water supply stops, without manual intervention. The reset action is quick and reliable, preparing for the next water circulation.

[0017] 5. The liquid outlet channel has a reduced diameter section, making the flow cross section of the liquid outlet channel smaller than that of the liquid inlet channel. This increases and stabilizes the pressure in the first cavity, ensuring that the movable sealing assembly can be pushed into place and preventing the movable sealing assembly from failing to seal the air inlet channel properly.

[0018] 6. The rib structure acts as a support and partition when the water is not flowing, preventing it from completely adhering to the bottom surface of the first cavity due to its own weight or slight deformation. The gaps formed between the ribs constitute a reliable gas flow path, ensuring that air can be smoothly introduced to break the siphon when there is negative pressure at the water inlet, while also ensuring that the water path is unobstructed when water is flowing.

[0019] 7. The outlet end of the liquid inlet channel (i.e., the first liquid inlet) and the inlet end of the liquid outlet channel (i.e., the first liquid outlet) are both formed on the bottom surface of the first cavity. This same-side liquid inlet and outlet layout is compact, which helps to reduce the overall height and volume of the product, facilitates installation and use in small spaces, and reduces the installation space requirements.

[0020] 8. A guide hole is provided on the air intake pipe for the rod of the movable sealing assembly to pass through, which can provide guidance for the movement of the rod and ensure that the seal on the rod can accurately seal the communication port. Attached Figure Description

[0021] Figure 1 This is an exploded view of the components of a vacuum breaker according to the present invention.

[0022] Figure 2 This is an exploded view of the components of a vacuum breaker according to the present invention from another perspective.

[0023] Figure 3 This is a three-dimensional structural view of a vacuum breaker according to the present invention.

[0024] Figure 4 This is a structural view of the bottom cover of the present invention.

[0025] Figure 5 This is a state view of the liquid inlet channel and liquid outlet channel of a vacuum breaker of the present invention being connected to the atmosphere.

[0026] Figure 6 This is a state view of the liquid being transported by a vacuum breaker according to the present invention.

[0027] Reference numerals: 1-Shell, 11-Body, 12-Bottom cover, 13-Air inlet pipe, 131-Guide hole, 14-Liquid inlet pipe, 15-Liquid outlet pipe, 16-Connecting port, 17-Connecting hole, 2-First cavity, 21-Rib, 3-Second cavity, 4-Liquid inlet channel, 41-First liquid inlet, 5-Liquid outlet channel, 51-First liquid outlet, 52-Liquid flow path, 53-Reduced diameter section, 6-Air inlet channel, 7-Suction channel, 71-Suction interface, 72-Suction flow path, 8-Separator, 81-Guide groove, 9-Modible sealing assembly, 91-Rod, 92-Driven part, 93-Sealing gasket, 94-Reset component. Detailed Implementation

[0028] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0029] Please see Figures 1 to 6A vacuum breaker includes a housing 1, which has a liquid inlet channel 4, a liquid outlet channel 5, and an air inlet channel 6. The housing 1 contains a first cavity 2 and a second cavity 3. The liquid inlet channel 4 and the liquid outlet channel 5 communicate with the first cavity 2, and the air inlet channel 6 communicates with the second cavity 3. The housing 1 also has a suction channel 7 that communicates with the second cavity 3 and the liquid outlet channel 5. The first cavity 2 and the second cavity 3 are separated by a partition 8. A movable sealing assembly 9 with a sealing gasket 93 is provided in the second cavity 3 to seal or open the air inlet channel 6. The movable sealing assembly 9 is kinetically connected to the partition 8, and the partition 8 is driven by the liquid inlet channel 4 to drive the movable sealing assembly 9 to seal the air inlet channel 6. By separating the first cavity 2 and the second cavity 3 with the partition 8, liquid cannot enter the second cavity 3 from the first cavity 2. Under water pressure, the partition 8 can also drive the movable sealing component 9 to seal the air inlet channel 6, making the second cavity 3 a sealed cavity. Water in the liquid outlet channel 5 cannot enter the second cavity 3 through the air intake channel 7 due to the pressure balance. The movable sealing component 9 is therefore completely isolated from water and does not come into contact with it, avoiding the formation of scale and impurities due to long-term contact with water, which would affect the sealing effect and cause leakage. In this embodiment, the movable sealing component 9 uses a sealing gasket 93 to seal the air inlet channel 6. If the movable sealing component 9 is not isolated from water when water is flowing, scale will easily accumulate on the sealing gasket 93, thus affecting the sealing effect of the sealing gasket 93. In other embodiments, the movable sealing component may use other sealing structures. In this case, if the sealing structure is not isolated from water, scale may also form on the sealing structure, affecting the sealing effect. An air intake channel 7 is provided on the housing 1 to connect the second cavity 3 and the liquid outlet channel; and the sealing and opening control of the air intake channel 6 is achieved in conjunction with the movable sealing component 9, so that the liquid inlet channel 4 and the liquid outlet channel 5 are connected to the atmosphere in the non-water-flow state. No matter whether there is negative pressure at the water inlet end (second liquid inlet) of the liquid inlet channel or the water outlet end (second liquid outlet) of the liquid outlet channel, the outside air can be introduced into the pipeline system through the air intake channel 7 to break the siphon and effectively prevent siphon backflow pollution.

[0030] Please see Figures 1 to 6Furthermore, the separator 8 is a flexible component, disposed between the first cavity 2 and the second cavity 3. When liquid enters the inlet channel 4, it deforms towards the second cavity 3 under the pressure of the liquid, thereby pushing the movable sealing assembly 9 to seal the air intake channel 6. The separator 8 is a sealing spring pad. The separator 8, using a flexible component (sealing spring pad, which can be bowl-shaped, saucer-shaped, etc.), is disposed between the first cavity 2 and the second cavity 3. When liquid enters the inlet channel 4, the flexible component deforms towards the second cavity 3 under the pressure of the liquid, thereby pushing the movable sealing assembly 9 to seal the air intake channel 6. Utilizing the water pressure itself as the driving force to move the movable sealing assembly 9 requires no external energy or additional control mechanism, resulting in a sensitive response, simple structure, and low cost. In other embodiments, the separator can also be a piston, used to move towards the second cavity 3 under the pressure of the liquid when liquid enters the inlet channel 4, thereby pushing the movable sealing assembly 9 to seal the air intake channel 6.

[0031] Please see Figures 1 to 6 Furthermore, the movable sealing assembly 9 includes a rod 91. One end of the rod 91 abuts against the separator 8 and is provided with a driven portion 92. The side of the separator that abuts against the driven portion 92 is provided with a guide groove 81. The driven portion 92 matches the size of the guide groove 81, and the driven portion 92 is disposed within the guide groove 81, cooperating with the guide groove 81 to achieve driving and guiding. This ensures that the movable sealing assembly 9 can be accurately and stably driven to move along a predetermined axial direction when the separator 8 deforms, avoiding offset or jamming, and improving the reliability of the operation and the accuracy of the seal. The driven portion 92 can be a hemispherical, frustum-shaped, or cylindrical protrusion structure. Correspondingly, the guide groove 81 can be a hemispherical groove, a conical groove, or a cylindrical groove. In this embodiment, the driven portion 92 adopts a cylindrical protrusion structure, and the corresponding guide groove 81 adopts a cylindrical groove.

[0032] Please see Figures 1 to 6 Furthermore, a sealing gasket 93 is provided at the end of the movable sealing assembly 9 away from the separator 8. The sealing gasket 93 passes through the rod 91 and can block the connection between the air intake channel 6 and the second cavity 3. The sealing gasket 93 moves synchronously with the rod 91. When the rod 91 is pushed upward by the separator 8, the sealing gasket 93 moves upward accordingly and blocks the connection between the air intake channel 6 and the second cavity 3, thus achieving a reliable seal of the air intake channel 6.

[0033] Please see Figures 1 to 6Furthermore, the movable sealing assembly 9 also includes a reset member 94, which passes through the rod 91 and drives the rod 91 to move towards the separator 8 to open the air intake channel 6. After the hydraulic pressure in the pipeline disappears, the reset member 94 can quickly release elastic potential energy to drive the rod 91 to reset, automatically opening the air intake channel 6, so that the equipment can instantly restore the vacuum breaking function, promptly break the negative pressure in the pipeline, effectively prevent pipeline collapse and water siphon backflow, and ensure the safe operation of the water supply and drainage system.

[0034] Please see Figures 1 to 6 Furthermore, the first cavity 2 is provided with a first liquid inlet 41 and a first liquid outlet 51. The liquid inlet channel 4 is connected to the first liquid inlet, and the liquid outlet channel 5 is connected to the first liquid outlet. The liquid outlet channel 5 is provided with a reduced diameter section 53, the flow cross-sectional area of ​​which is smaller than the minimum flow cross-sectional area of ​​the first liquid outlet. The abrupt change in the cross-sectional area of ​​the reduced diameter section 53 creates a throttling effect, which can effectively increase the pressure-holding capacity of the first cavity 2, increase the liquid pressure value in the cavity, ensure that the separator 8 obtains sufficient driving force at the rated flow rate, ensure stable and reliable sealing action, avoid sealing failure and leakage problems caused by insufficient pressure, and at the same time stabilize the liquid flow in the pipeline and reduce water flow fluctuations.

[0035] Please see Figures 1 to 6 Furthermore, the suction end of the suction channel 7 is connected to the second cavity 3, and the outlet end of the suction channel 7 is connected to the liquid outlet channel 5 and is located downstream of the reduced diameter section 53. The downstream area of ​​the reduced diameter section 53 is the region where the negative pressure of the pipeline is most stable. Pressure tapping and suction here can complete the suction and vacuum breaking action more quickly, avoid vacuum residue, greatly improve the vacuum breaking sensitivity and working accuracy of the equipment, and is less prone to backflow.

[0036] Please see Figures 1 to 6 Furthermore, the surfaces of the first cavity 2 and the partition 8 opposite to each other are provided with multiple ribs 21 protruding towards the partition 8. These ribs 21 are spaced apart to ensure that the first cavity 2 is connected to both the inlet channel 4 and the outlet channel 5. The ribs 21 ensure that the airflow between the inlet channel 4 and the outlet channel 5 remains unobstructed when water is not flowing through it. This allows air to be introduced to break the siphon even when there is negative pressure at the inlet, further enhancing the bidirectional vacuum breaking capability, while also ensuring unobstructed water flow when water is flowing through it.

[0037] Please see Figures 1 to 6Furthermore, the outlet end of the liquid inlet channel 4, i.e., the first liquid inlet, is formed on the bottom surface of the first cavity 2, and the inlet end of the liquid outlet channel 5, i.e., the first liquid outlet, is formed on the bottom surface of the first cavity 2. Since both the outlet end of the liquid inlet channel 4 and the inlet end of the liquid outlet channel 5 are located on the bottom surface of the first cavity 2, both liquid inlet and outlet are completed on the bottom side. This results in a compact structural layout, which helps reduce the overall size of the product and facilitates installation and use in confined spaces.

[0038] Please see Figures 1 to 6 The liquid inlet channel is connected to the first liquid inlet, and the first liquid inlet is oriented towards the separator.

[0039] Please see Figures 1 to 6 Furthermore, the housing 1 includes a body 11, a bottom cover 12, an air inlet pipe 13, a liquid inlet pipe 14, and a liquid outlet pipe 15. The body 11 is fixed on the bottom cover 12. The second cavity 3 is opened in the body 11, and the first cavity 2 is opened on the bottom cover 12. The air inlet pipe 13 is fixed on the upper side of the body 11. The liquid inlet pipe 14 and the liquid outlet pipe 15 are connected to the bottom cover 12. After the body 11 and the bottom cover 12 are fixed, the second cavity 3 is located on the upper side of the first cavity 2. This makes the deformation driving direction of the separator 8 consistent with the movement direction of the rod 91 when subjected to water pressure, resulting in smoother and more natural movement.

[0040] Please see Figures 1 to 6 Furthermore, a connecting hole 17 is provided on the main body 11 above the second cavity 3 for assembling the air intake pipe 13. The air intake pipe 13 has an air intake channel 6 and a guide hole 131. The guide hole 131 is offset from the air intake channel 6. The end of the rod 91 of the movable sealing assembly 9 away from the separator 8 passes through the guide hole 131. A gap is provided between the rod 91 and the guide hole 131. One end of the reset member 94 of the movable sealing assembly 9 is located at the air intake... The air tube 13 has one end facing the second cavity 3 at the guide hole 131, and the other end of the reset member is connected to the rod 91. The body 11 has a connecting port 16 between the connecting hole and the second cavity 3. The diameter of the connecting port 16 is smaller than the diameter of the connecting hole 17 and the diameter of the sealing gasket 93. The connecting port 16 and the guide hole 131 are coaxial. This provides guidance for the movement of the rod 91 and ensures that the sealing member on the rod 91 can accurately seal the connecting port 16. The diameter of the connecting port 16 is smaller than the diameter of the sealing gasket 93, ensuring that the sealing gasket 93 can completely cover and effectively seal the connecting port 16 after being moved upward by the movable sealing assembly 9, avoiding air leakage due to insufficient sealing area, and ensuring the airtightness of the second cavity 3 in the water-filled state. The connecting port 16 connects to the air inlet channel 6.

[0041] Please see Figures 1 to 6 Furthermore, the inlet pipe 14 is integrally formed with the bottom cover 12. The bottom cover 12 is provided with a first outlet 51 and a first inlet 41. The inlet channel 4 is formed in the inlet pipe 14. The first inlet 41 is the outlet end of the inlet channel 4, and the first outlet 51 is the inlet end of the outlet channel 5. An air intake interface 71 is provided on the body 11. The air intake end of the air intake channel is connected to the air intake interface 71. The outlet pipe 15 can be used for the liquid flow path 52 and the air intake path 72. The integrated design of the liquid flow path 52 and the air intake path 72 in the outlet pipe 15 integrates the functions of liquid delivery and gas intake in the same component, reducing the use of independent pipelines and additional connection joints, making the overall structure simpler and more compact.

[0042] The present invention has the following working principle: In non-water-flowing state: When no water flows through, the movable sealing assembly 9 is in a downward position under the elastic force of the reset member 94 (reset spring), that is, the rod 91 moves towards the separator 8. At this time, the sealing gasket 93 separates from the connecting port 16, and the air inlet channel 6 is connected to the liquid outlet channel 5 through the second cavity 3, the suction channel 7, the first cavity 2, and the liquid inlet channel 4. Therefore, both the liquid inlet channel 4 and the liquid outlet channel 5 are connected to the atmosphere through the suction channel 7 and the second cavity 3. At the same time, since the bottom surface of the first cavity 2 is provided with ribs 21, the airflow channel between the liquid inlet channel 4 and the liquid outlet channel 5 is ensured to be unobstructed. When there is negative pressure at the second liquid outlet or the second liquid inlet, outside air can enter the second cavity 3 through the air inlet channel 6, and then enter through the suction channel 7, thereby introducing air to break the siphon.

[0043] Water flow condition: When liquid enters the first cavity 2 from the inlet channel 4, under the action of water pressure, the separator 8 deforms towards the second cavity 3. This drives the driven part 92 of the movable sealing assembly 9 through the guide groove 81, thereby pushing the rod 91 to move upward. When the rod 91 moves upward, the sealing gasket 93, which passes through the rod 91, moves upward as well, until it blocks the connecting port 16, making the second cavity 3 a sealed cavity. At this time, since the second cavity 3 is isolated from the atmosphere and is in a sealed state, the water in the first cavity 2 cannot flow into the second cavity 3. Therefore, the sealing gasket 93 will not come into contact with water, avoiding the formation of scale or impurities due to long-term contact with water. Furthermore, since the outlet channel 5 is provided with a narrowing section 53, its flow cross-sectional area is smaller than the minimum flow cross-sectional area of ​​the inlet channel 4, and the liquid outflow is obstructed. Compared with the first cavity 2 without the narrowing section 53, the "back pressure" higher than the inlet pressure can be established more quickly. The pressure applied directly to the separator 8 (sealing gasket) located at the connection between the first cavity 2 and the second cavity 3 can push the rod 91 to move more quickly, ensuring that the rod 91 remains in the predetermined sealing position. Of course, the reduced diameter section can be omitted.

[0044] Water cut-off reset state: When the inlet channel 4 stops water intake and the water pressure disappears, the separator 8 returns to its original state under the action of its own elastic restoring force and the elastic force of the reset component 94, the movable sealing component 9 moves down, the sealing gasket 93 leaves the connecting port 16, the air intake channel 6 reconnects with the second cavity 3, the device returns to the non-water-flow state, and waits for the next water-flow cycle.

[0045] Several points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection" and "linkage" should be interpreted broadly, and can be mechanical or electrical connection, or internal connection between two components, or direct connection. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationship. When the absolute position of the described object changes, the relative positional relationship may change.

[0046] Secondly: The accompanying drawings of the embodiments disclosed in this invention only involve the structures involved in the embodiments disclosed in this invention. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this invention can be combined with each other.

[0047] Finally, the above description is only a preferred embodiment of the present invention, and the scope of protection of the present invention is not limited to the above embodiments. All technical solutions that fall within the scope of the present invention are within the scope of protection of the present invention.

[0048] It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of this invention should also be considered within the scope of protection of this invention.

Claims

1. A vacuum breaker, comprising a housing, wherein the housing is provided with a liquid inlet channel, a liquid outlet channel, and an air inlet channel, characterized in that: The housing has a first cavity and a second cavity. The liquid inlet channel and the liquid outlet channel are connected to the first cavity, and the air inlet channel is connected to the second cavity. The housing also has an air intake channel connecting the second cavity and the liquid outlet channel. The first cavity and the second cavity are isolated by a partition. A movable sealing assembly is provided in the second cavity to seal or open the air inlet channel. The movable sealing assembly is driven by the partition. The partition is driven by the liquid inlet channel to drive the movable sealing assembly to seal the air inlet channel.

2. A vacuum breaker according to claim 1, characterized in that: The separator is a flexible component, which is used to deform towards the second cavity under the pressure of the liquid when liquid enters the liquid inlet channel, thereby pushing the movable sealing assembly to seal the air inlet channel; Alternatively, the separator may be a piston, which is driven by liquid pressure to move toward the second cavity when liquid enters the inlet channel, thereby pushing the movable sealing assembly to seal the air inlet channel.

3. A vacuum breaker according to claim 1, characterized in that: The movable sealing assembly includes a rod body, one end of which abuts against the separator and is provided with a driven part. The side of the separator that abuts against the driven part is provided with a guide groove. The driven part is sized to match the guide groove and is disposed within the guide groove to cooperate with the guide groove to achieve driving and guiding. The movable sealing assembly also has a sealing gasket at the end away from the separator, which can block the connection between the air intake channel and the second cavity.

4. A vacuum breaker according to claim 1, characterized in that: The movable sealing assembly also includes a reset member for driving the movable sealing assembly to move toward the separator to open the air intake passage.

5. A vacuum breaker according to claim 1, characterized in that: The air intake end of the air intake channel is connected to the second cavity, and the air outlet end of the air intake channel is connected to the liquid outlet channel.

6. A vacuum breaker according to claim 1, characterized in that: The first cavity is provided with a first liquid inlet and a first liquid outlet. The liquid inlet channel is connected to the first liquid inlet, and the liquid outlet channel is connected to the first liquid outlet. The liquid outlet channel is provided with a narrowed section. The flow cross-sectional area of ​​the narrowed section is smaller than the minimum flow cross-sectional area of ​​the first liquid outlet. The air outlet of the suction channel is located downstream of the narrowed section.

7. A vacuum breaker according to claim 1, characterized in that: The surface of the first cavity opposite to the partition is provided with multiple ribs protruding towards the partition. The multiple ribs are spaced apart from each other to ensure that the first cavity is connected to the liquid inlet channel and the liquid outlet channel respectively.

8. A vacuum breaker according to claim 1, characterized in that: The first cavity is provided with a first liquid inlet, and the liquid inlet channel is connected to the first liquid inlet. The first liquid inlet is positioned facing the separator.

9. A vacuum breaker according to claim 1 or 8, characterized in that: The housing includes a body, a bottom cover, an air inlet pipe, a liquid inlet pipe, and a liquid outlet pipe. The body is fixed on the bottom cover. The second cavity is opened in the body. The first cavity is opened on the bottom cover. The air inlet pipe is fixed to the upper side of the body. The liquid inlet pipe and the liquid outlet pipe are connected to the bottom cover. After the body and the bottom cover are fixed, the second cavity is located on the upper side of the first cavity.

10. A vacuum breaker according to claim 9, characterized in that: The main body has a connecting hole above the second cavity for assembling the air intake pipe. The air intake pipe has an air intake channel and a guide hole. The movable sealing assembly includes a rod, with one end of the rod away from the separator passing through the guide hole. A gap is provided between the rod and the guide hole. The movable sealing assembly includes a reset member, with one end of the reset member located on the air intake pipe at the end facing the second cavity from the guide hole, and the other end of the reset member connected to the rod. The main body has a communication port between the connecting hole and the second cavity. The diameter of the communication port is smaller than the diameter of the connecting hole and smaller than the diameter of the sealing gasket of the movable sealing assembly. The communication port connects to the air intake channel.

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