Float-controlled valve

Abstract

The float valve comprises a valve seat provided with a vertically-through channel and a floater floating up and down along the channel so as to be provided with an opening position and a closing position, an air inlet is formed in the lower portion of the floater, and a small-diameter section and a large-diameter section which are arranged up and down are arranged on the upper portion of the floater. The outer diameter of the large-diameter section is larger than that of the small-diameter section; at the opening position, the part, located in the channel, of the small-diameter section is provided with an air outlet in the transverse direction, and an air passing gap is formed between the small-diameter section and the inner wall of the channel. In the cooking process, along with steam discharge, part of steam is condensed into water, and the condensed water can seal the air passing gap in a liquid mode, so that the upper pressure in the cooking cavity is facilitated, and the floater is easier to float upwards.

Description

Technical Field

[0001] The present application belongs to the technical field of kitchen appliances, and in particular relates to a float valve. Background Art

[0002] During the cooking process of the pressure cooker, the liquid in the cooking chamber boils to produce steam, and the pressure in the cooking chamber slowly rises. The steam is discharged through the air outlet channel in the float valve. Under the combined action of the steam and the pressure in the cooking chamber, the float moves upward to drive the seal provided at the lower part of the float to move upward. When the seal abuts and seals the valve seat of the float valve, the steam in the cooking chamber cannot be discharged, and the pressure in the cooking chamber further rises to reach the final pressure required for cooking.

[0003] In actual application, taking cooking a large amount of rice as an example, there is a large amount of rice in the cooking chamber. When the power of the bottom heating unit is constant during the cooking process, the large amount of rice will greatly reduce the intensity of boiling in the cooking chamber, resulting in insufficient steam generation, and the float cannot float up, resulting in unsuccessful pressure increase.

[0004] Moreover, the air outlet of the existing float valve faces upward. During use, the air outlet is easily blocked by foreign matter such as rising soup, causing the float valve to fail, and the cold air in the cooking cavity cannot be discharged, affecting the temperature in the cooking cavity and the cooking effect. Utility Model Content

[0005] The present application provides a float valve to solve the technical problem that when cooking in the existing pressure cooker, if the boiling in the cooking chamber is not intense enough and the amount of steam generated is insufficient, the float is difficult to float up, which may lead to failure of pressure raising.

[0006] The technical solution adopted in this application is:

[0007] A float valve comprises a valve seat having a channel running through the upper and lower parts, and a float floating up and down along the channel to have an open position and a closed position, wherein the lower part of the float is provided with an air inlet, and the upper part of the float is provided with a small diameter section and a large diameter section arranged up and down, wherein the outer diameter of the large diameter section is larger than the outer diameter of the small diameter section; in the open position, the part of the small diameter section located in the channel is provided with an air outlet in the transverse direction, and an air gap is formed between the small diameter section and the inner wall of the channel.

[0008] The float valve in the present application also includes the following additional technical features:

[0009] The float valve also includes a sealing member installed on the float, the sealing member includes a sealing body and a sealing lip provided above the sealing body, the sealing member moves upward with the float to have a first position and a second position abutting against the valve seat, in the first position, an exhaust passage communicating with the air inlet is provided between the sealing lip and the valve seat, in the second position, the sealing lip abuts against the valve seat for sealing.

[0010] The sealing member also includes a protrusion protruding upward along the sealing lip; in the first position, the protrusion abuts against the valve seat, and an exhaust gap exists between the area of ​​the sealing lip where the protrusion is not provided and the valve seat, and the exhaust gap constitutes the exhaust channel; in the second position, the area of ​​the sealing lip where the protrusion is not provided abuts against the valve seat for sealing.

[0011] The sealing lip has a fitting section and a connecting section connecting the fitting section and the sealing body, and the fitting section is provided with an exhaust hole; in the first position, an angle is formed between the fitting section and the valve seat, and the exhaust hole is open to form the exhaust channel; in the second position, the fitting section is flat to abut and seal against the valve seat, and the exhaust hole is closed.

[0012] The float further includes a diameter-reducing section connecting the small-diameter section and the large-diameter section. In the open position, a liquid-sealed gap exists between the diameter-reducing section and the inner wall of the channel.

[0013] The size of the air gap is A, and A satisfies: 0.5mm≦A≦1mm.

[0014] The float valve also includes a sealing member that moves upward with the float to abut against the valve seat. A mounting groove is provided at the lower part of the float, and the sealing member has an anti-slip portion embedded in the mounting groove.

[0015] The small diameter section is provided with a plurality of the air outlets at intervals along its circumference.

[0016] The lower part of the float is provided with a plurality of air inlets along its circumference.

[0017] A step portion is provided inside the channel, and a stop portion is provided in the large diameter section. In the open position, the stop portion abuts against the step portion to limit the downward movement of the float.

[0018] Due to the adoption of the above technical solution, the beneficial effects achieved by this application are as follows:

[0019] 1. Compared with the existing technical solution in which the air outlet is arranged upward, the air outlet of the float in the present application is arranged horizontally. On the one hand, it can realize lateral air outlet, increase the upward thrust on the float, make the float easier to float, thereby helping to achieve upward pressure in the cooking cavity; on the other hand, it can reduce the probability of the air outlet being blocked by foreign objects, and realize normal exhaust during the cooking process.

[0020] Moreover, the float in the present application is divided into a large diameter section and a small diameter section, the gas outlet is arranged in the small diameter section, and when in the open position, a section of the small diameter section provided with the gas outlet is located in the channel of the valve seat, and a gas gap is formed between the small diameter section and the inner wall of the channel. During the cooking process, as the steam is discharged, part of the steam condenses into water, and the condensed water can seal the gas gap, thereby contributing to the upward pressure in the cooking cavity. Of course, as the pressure in the cooking cavity increases, the steam can break the liquid seal at the gas outlet to further achieve the gas discharge, but compared with the state in which the gas outlet is completely open in the prior art, although the liquid seal will be broken, the gas gap is relatively reduced, and the exhaust volume per unit time is reduced, making it easier for the pressure in the cooking cavity to rise, thereby contributing to the floating of the float, facilitating the float to be lifted up, and the pressure in the cooking cavity to further rise, so as to reach the final pressure required for cooking. In addition, if an abnormality occurs during use and the float cannot float up, even if the pot continues to boil, the liquid seal will be broken, so the pressure in the cooking cavity will not be overpressured.

[0021] Because the float in the present application is easier to float than the float in the prior art, the float valve in the present application is particularly suitable for the scenario of cooking large amounts of rice. That is, when the pressure cooker is provided with the float valve in the present application, even when cooking a large amount of rice, the boiling in the cooking chamber is not intense enough and the amount of steam generated is insufficient, but it can still be smoothly pressurized under the conventional cooking procedure, thereby ensuring the cooking effect and improving the user experience.

[0022] 2. The float in the present application is easier to float than the float in the prior art, which may result in a certain amount of residual cold air in the cooking cavity during the cooking process. To solve this problem, as a preferred embodiment of the present application, the seal provided on the float has a first position and a second position abutting against the valve seat, and the seal includes a sealing lip located above the sealing body. In the first position, an exhaust channel connected to the air inlet is provided between the sealing lip and the valve seat, so that the gas in the cooking cavity can enter the float through the exhaust channel and the air inlet to achieve exhaust, thereby discharging the cold air that has not been completely exhausted in the pot, thereby achieving a reverse compensation effect. On the one hand, the exhaust can be delayed to lock the exhaust, so that the cold air in the cooking cavity can be discharged as much as possible to ensure the cooking effect. On the other hand, after the pressure in the cooking cavity is increased, the odor in the food can be forced out, and at this time the gas can still be discharged through the exhaust channel and the float, thereby achieving odor removal, improving the cooking effect of food, and providing a pleasant user experience.

[0023] 3. As a preferred embodiment of the present application, the float further comprises a diameter-changing section connecting the small diameter section and the large diameter section, and in the open position, there is a liquid-sealed gap between the diameter-changing section and the inner wall of the channel. After the small diameter section and the inner wall of the channel are sealed to form a water column in the open position of the float, the liquid-sealed gap can be generated due to the presence of the diameter-changing section. The presence of water in the liquid-sealed gap can increase the pulling force and adsorption force between the water films formed around the gas outlet, so that the liquid seal around the gas outlet is not easily destroyed, which is conducive to the upward pressure in the cooking cavity and the rapid floating of the float.

[0024] 4. As a preferred embodiment of the present application, the size of the air gap is A, and A satisfies: 0.5mm≦A≦1mm. By setting the size within the above range, the adhesion tension between the condensed water and the valve seat, the blocking of the condensed water to the gas, and the appropriate small gap can be used to form a liquid seal, and the resistance during gas discharge can be appropriately increased to reduce the exhaust volume per unit time, so that the pressure in the cooking cavity is easier to rise, so that the float is easier to float. If the size A is greater than 1mm, the excessive size will cause the space at the air gap to be too large, and the gas will easily blow away the condensed water. The air gap is not easy to be liquid sealed, which reduces the speed of the float floating and reduces the cooking efficiency. If the size A is less than 0.5mm, under the action of the smaller air gap and the liquid seal, the resistance during gas discharge is large, and the float floats too quickly, resulting in the cold air in the cooking cavity cannot be discharged in time, and the odor in the food cannot be forced out, affecting the cooking effect.

[0025] 5. As a preferred embodiment of the present application, the small diameter section is provided with multiple air outlets at intervals along its circumference, so as to ensure smooth exhaust of the float and improve exhaust efficiency, so that after the pressure in the cooking cavity is raised, as much cold air as possible can be discharged through the float to increase the temperature in the cooking cavity and improve the cooking effect. The presence of multiple air outlets can also greatly reduce the probability of all air outlets being blocked and reduce the exhaust abnormality rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0027] Figure 1 This is an exploded view of the structure of the pot cover in one embodiment of the present application;

[0028] Figure 2 A cross-sectional view of the pot lid when the float is in the open position according to one embodiment of the present application Figure 1 ;

[0029] Figure 3This is a cross-sectional view of the pot cover when the float is in a closed position in one embodiment of the present application. Figure 2 ;

[0030] Figure 4 A cross-sectional view of a float valve when the float is in an open position according to an embodiment of the present application;

[0031] Figure 5 A cross-sectional view of a float valve when the sealing member is in a first position according to an embodiment of the present application;

[0032] Figure 6 A cross-sectional view of a float valve when the float is in a closed position and the sealing member is in a second position in one embodiment of the present application;

[0033] Figure 7 A cross-sectional view of a valve seat in accordance with an embodiment of the present application;

[0034] Figure 8 A three-dimensional diagram of a float in one embodiment of the present application;

[0035] Fig. 9 A cross-sectional view of a float in one embodiment of the present application;

[0036] Fig.10 A three-dimensional diagram of a seal according to an embodiment of the present application;

[0037] Fig.11 This is a cross-sectional view of a seal according to an embodiment of the present application.

[0038] in,

[0039] 1. Valve seat; 11. Channel; 12. Step portion;

[0040] 2. float; 21. small diameter section; 22. large diameter section; 23. air outlet; 24. air inlet; 25. variable diameter section; 26. stopper; 27. mounting groove;

[0041] 3. sealing member; 31. sealing body; 32. sealing lip; 321. raised portion; 33. anti-slip portion;

[0042] 4. Sealing structure;

[0043] 5. Pot cover;

[0044] 6. Air gap;

[0045] 7. Exhaust gap. DETAILED DESCRIPTION

[0046] In order to more clearly illustrate the overall concept of the present application, a detailed description is given below in an illustrative manner in conjunction with the accompanying drawings.

[0047] In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present application is not limited by the specific embodiments disclosed below. It should be noted that the embodiments of the present application and the features in each embodiment may be combined with each other without conflict.

[0048] In addition, in the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms "top", "bottom", "inside", "outside", "axial", "radial", "circumferential", etc. are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0049] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0050] In the present application, unless otherwise clearly specified and limited, a first feature "above" or "below" a second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more embodiments or examples.

[0051] like Figures 1 to 4 , Figure 6As shown, a float valve comprises a valve seat 1 having a channel 11 penetrating from top to bottom, and a float 2 floating up and down along the channel 11 to have an open position and a closed position, an air inlet 24 is provided at the lower part of the float 2, and a small diameter section 21 and a large diameter section 22 arranged up and down are provided at the upper part of the float 2, the outer diameter of the large diameter section 22 is larger than the outer diameter of the small diameter section 21; in the open position, the part of the small diameter section 21 located in the channel 11 is provided with an air outlet 23 in the transverse direction, and an air gap 6 is formed between the small diameter section 21 and the inner wall of the channel 11.

[0052] The float valve in the present application can be applied to a pressure cooker. The pressure cooker comprises a pot body having a cooking cavity and a pot cover 5 for opening or covering the cooking cavity. The float valve is arranged on the pot cover 5 .

[0053] Compared with the existing technical solution in which the air outlet is arranged upward, the air outlet 23 of the float 2 in the present application is arranged horizontally. On the one hand, it can realize lateral air outlet, increase the upward thrust on the float 2, make the float 2 more easily float up, thereby helping to achieve upward pressure in the cooking cavity. On the other hand, it can reduce the probability of the air outlet 23 being blocked by foreign objects, and realize normal exhaust during the cooking process.

[0054] Moreover, the float 2 in the present application is divided into a large diameter section 22 and a small diameter section 21, the gas outlet 23 is arranged in the small diameter section 21, and when in the open position, a section of the small diameter section 21 provided with the gas outlet 23 is located in the channel 11 of the valve seat 1, and a gas gap 6 is formed between the small diameter section 21 and the inner wall of the channel 11. During the cooking process, as the steam is discharged, part of the steam condenses into water, and the condensed water can seal the gas gap 6, thereby facilitating the upward pressure in the cooking cavity. Of course, as the pressure in the cooking cavity increases, the steam can break the liquid seal at the gas outlet 23 to further achieve gas discharge, but compared with the state in which the gas outlet 23 is fully open in the prior art, although the liquid seal will be broken, the gas gap 6 is relatively reduced, and the exhaust volume per unit time is reduced, so that the pressure in the cooking cavity is easier to rise, thereby facilitating the floating of the float 2, facilitating the float 2 to be lifted up, and the pressure in the cooking cavity to further rise, so as to reach the final pressure required for cooking.

[0055] In addition, if an abnormality occurs during use and the float is unable to float up, even if the pot continues to boil, the liquid seal will be broken and the pressure in the cooking chamber will not exceed the limit.

[0056] Because the float 2 in the present application is easier to float than the float in the prior art, the float valve in the present application is particularly suitable for the scenario of cooking a large amount of rice. That is, when the pressure cooker is provided with the float valve in the present application, even when cooking a large amount of rice, the boiling in the cooking chamber is not intense enough and the amount of steam generated is insufficient, but it can still be smoothly pressurized under the conventional cooking procedure, thereby ensuring the cooking effect and improving the user experience.

[0057] As a preferred embodiment of the present application, the valve seat 1 is detachably mounted on the pot cover 5 to facilitate installation, removal and maintenance of the float valve. The detachable connection between the valve seat 1 and the pot cover 5 includes but is not limited to threaded connection, snap connection, magnetic attraction, etc.

[0058] As a preferred embodiment of the present application, a sealing structure 4 is provided between the valve seat 1 and the pot cover 5 to prevent the steam in the cooking cavity from overflowing through the joint between the valve seat 1 and the pot cover 5 during the cooking process.

[0059] Compared with the float in the prior art, the float 2 in the present application is easier to float, which may cause a certain amount of cold air to remain in the cooking cavity during the cooking process. To solve this problem, as a preferred embodiment of the present application, Figure 5 and Figure 6 As shown, the float valve also includes a seal 3 installed on the float 2, and the seal 3 includes a seal body 31 and a seal lip 32 arranged above the seal body 31. The seal 3 moves upward with the float 2 to have a first position and a second position abutting against the valve seat 1. In the first position, there is an exhaust channel connected to the air inlet 24 between the seal lip 32 and the valve seat 1, and in the second position, the seal lip 32 abuts against the valve seat 1 for sealing. In the first position, there is an exhaust channel connected to the air inlet 24 between the seal lip 32 and the valve seat 1, so that the gas in the cooking cavity can enter the float 2 through the exhaust channel and the air inlet 24 to achieve exhaust, so that the cold air that is not completely exhausted in the pot can be discharged, and the reverse compensation effect can be achieved. On the one hand, the exhaust can be delayed to lock the exhaust, so that the cold air in the cooking cavity can be exhausted as much as possible to ensure the cooking effect. On the other hand, after the pressure in the cooking cavity is raised, the odor in the food can be forced out, and at this time, the gas can still be discharged through the exhaust channel and the float 2, so that the odor can be discharged, the cooking effect of the food can be improved, and the user experience is pleasant.

[0060] As a preference, Figure 6 and Figure 7 As shown, the portion where the valve seat 1 abuts against the sealing lip 32 is a plane, so as to improve the sealing effect when the sealing lip 32 abuts against the valve seat 1 to seal.

[0061] In this embodiment, the structure of the exhaust passage can adopt any one of the following embodiments:

[0062] Example 1: Figure 5 , Figure 6 , Fig.10 and Fig.11As shown, the sealing member 3 further comprises a protrusion 321 protruding upward along the sealing lip 32; in the first position, the protrusion 321 abuts against the valve seat 1, and an exhaust gap 7 exists between the area of ​​the sealing lip 32 where the protrusion 321 is not provided and the valve seat 1, and the exhaust gap 7 constitutes an exhaust channel; in the second position, the area of ​​the sealing lip 32 where the protrusion 321 is not provided abuts against the valve seat 1 for sealing.

[0063] The present embodiment 1 does not limit the number of the protrusions 321, which may be one, two, or more. When there is one protrusion 321, in the first position, the protrusion 321 can abut against the valve seat 1, and an exhaust gap 7 can exist between the sealing lip 32 where the protrusion 321 is not provided and the valve seat 1, and the gas in the cooking cavity enters between the sealing lip 32 and the float 2 through the exhaust gap 7, and then enters the float 2 through the air inlet 24. When there are two or more protrusions 321, in the first position, the sealing lip 32 forms an exhaust gap 7 between two adjacent protrusions 321, and the gas in the cooking cavity enters between the sealing lip 32 and the float 2 through the exhaust gap 7, and then enters the float 2 through the air inlet 24.

[0064] In the second position, the sealing lip 32 and the protrusion 321 can be elastically deformed to abut and seal with the valve seat 1 to prevent the gas in the cooking cavity from leaking out through the float 2, thereby achieving pressure build-up in the cooking cavity.

[0065] Furthermore, the sealing body 31 , the sealing lip 32 and the protruding portion 321 are an integrally formed structure to enhance the structural strength of the sealing element 3 .

[0066] Embodiment 2: The sealing lip 32 has a fitting section and a connecting section connecting the fitting section and the sealing body 31, and the fitting section is provided with an exhaust hole; in the first position, there is an angle between the fitting section and the valve seat 1, and the exhaust hole is open to form an exhaust passage; in the second position, the fitting section is flat to abut against the valve seat 1 for sealing, and the exhaust hole is closed. That is, in the first position, the pressure in the cooking chamber is not enough to completely push the fitting section up to make it fit with the bottom wall of the valve seat 1, and at this time there is an angle between the fitting section and the bottom wall of the valve seat 1, and the exhaust hole is in an open state, and the gas in the cooking chamber can enter the space between the sealing lip 32 and the float 2 through the exhaust hole, so that it can be discharged through the float 2 through the air inlet 24. When the pressure in the cooking chamber rises to a level sufficient to make the fitting section fit with the bottom wall of the valve seat 1, the exhaust hole provided on the fitting section is blocked by the valve seat 1, the exhaust passage is closed, and the pressure in the cooking chamber is increased to reach a preset cooking pressure.

[0067] Preferably, the fitting section is provided with a plurality of exhaust holes at intervals along its circumference to improve exhaust efficiency when in the first position.

[0068] Furthermore, the sealing body 31 , the fitting section, and the connecting section are an integrally formed structure to enhance the structural strength of the sealing member 3 .

[0069] The structure of the float 2 in the present application can adopt any one of the following embodiments:

[0070] Embodiment 1: The small diameter section 21 and the large diameter section 22 are directly connected to form a step at the connection between the two.

[0071] Implementation method 2: Figure 4 , Figure 8 and Fig. 9 As shown, the float 2 further includes a diameter-reducing section 25 connecting the small-diameter section 21 and the large-diameter section 22. In the open position, there is a liquid-sealed gap between the diameter-reducing section 25 and the inner wall of the channel 11. After the small-diameter section 21 and the inner wall of the channel 11 are sealed to form a water column in the open position of the float 2, the liquid-sealed gap can be generated due to the existence of the diameter-reducing section 25. The existence of water in the liquid-sealed gap can increase the pulling force and adsorption force between the water films formed around the gas outlet 23, so that the liquid seal around the gas outlet 23 is not easily destroyed, which is conducive to the upward pressure in the cooking cavity and the rapid floating of the float 2.

[0072] The second embodiment does not limit the change form of the outer diameter of the variable diameter section 25. In one example, the outer diameter of the variable diameter section 25 increases from top to bottom in a gradual change trend. In another example, the outer diameter of the variable diameter section 25 changes irregularly from top to bottom, for example, the cross-section of the variable diameter section 25 along the axial direction of the float 2 is arc-shaped, and the arc is composed of a plurality of small arc segments with different curvature radii, so that the variable diameter section 25 as a whole has a change trend of being smaller at the top and larger at the bottom.

[0073] like Figure 4 As shown, the size of the air gap 6 is A. As a preferred embodiment of the present application, A satisfies: 0.5mm≦A≦1mm. By setting the size within the above range, the adhesion tension between the condensed water and the valve seat, the blocking of the condensed water to the gas, and the appropriate small gap can be used to form a liquid seal, and the resistance during gas discharge can be appropriately increased to reduce the exhaust volume per unit time, so that the pressure in the cooking cavity is easier to rise, so that the float is easier to float. If the size A is greater than 1mm, the excessive size will cause the space at the air gap to be too large, and the gas will easily blow away the condensed water. The air gap 6 is not easy to be liquid sealed, which reduces the speed of the float floating and reduces the cooking efficiency. If the size A is less than 0.5mm, under the action of the smaller air gap 6 and the liquid seal, the resistance during gas discharge is large, and the float floats too quickly, so that the cold air in the cooking cavity cannot be discharged in time, and the odor in the food cannot be forced out, affecting the cooking effect.

[0074] Furthermore, A satisfies: 0.6mm≦A≦0.8mm, so as to better promote the floating of the float and ensure the cooking efficiency.

[0075] In one embodiment, the small diameter section 21 is provided with an air outlet 23 .

[0076] In another embodiment, Fig. 9 As shown, the small diameter section 21 is provided with a plurality of air outlets 23 at intervals along its circumference, so as to ensure smooth exhaust of the float 2 and improve exhaust efficiency, so that after the pressure in the cooking cavity is raised, as much cold air as possible can be discharged through the float 2 to increase the temperature in the cooking cavity and improve the cooking effect. In addition, the presence of a plurality of air outlets 23 can also greatly reduce the probability of all air outlets 23 being blocked, and reduce the exhaust abnormality rate.

[0077] Furthermore, the plurality of air outlets 23 are evenly arranged along the circumference of the small diameter section 21, so that when the air gap 6 is liquid-sealed, the tension of the water film between the air outlets 23 is uniform, so that the exhaust or sealing state at each air outlet 23 is consistent, so that when the float 2 floats up, the lateral air outlet force in each direction is consistent, so that the float 2 can be stably pushed upward to avoid jamming.

[0078] In one embodiment, an air inlet 24 is provided at the lower portion of the float 2 .

[0079] In another embodiment, Fig. 9 As shown, the lower part of the float 2 is provided with a plurality of air inlets 24 along its circumference, so as to ensure smooth exhaust of the float 2 and improve exhaust efficiency. Furthermore, the plurality of air inlets 24 are evenly arranged along the circumference of the lower part of the float 2.

[0080] As a preferred implementation of the present application, Figures 4 to 6 , Figure 8 and Fig. 9 As shown, the float valve further includes a seal 3 that moves upward with the float 2 to abut against the valve seat 1, a mounting groove 27 is provided at the lower portion of the float 2, and the seal 3 has an anti-detachment portion 33 embedded in the mounting groove 27. In this embodiment, the seal 3 is detachably mounted on the float 2 through the anti-detachment portion 33, which facilitates the assembly and disassembly of the seal 3, facilitates the user to clean the seal 3, and also facilitates the user to disassemble and replace the seal 3, thereby reducing maintenance costs.

[0081] As a preferred implementation of the present application, Figure 4 As shown, a step portion 12 is provided inside the channel 11, and a stopper 26 is provided in the large diameter section 22. In the open position, the stopper 26 abuts against the step portion 12 to limit the downward movement of the float 2. In this way, the downward displacement of the float 2 can be limited, and the float 2 can be prevented from falling out of the channel 11, thereby ensuring the normal operation of the float valve.

[0082] Anything not described in this application can be achieved by adopting or drawing on existing technologies.

[0083] The various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referenced to each other, and each embodiment focuses on the differences from other embodiments.

[0084] The above is only an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

1. A float valve, comprising a valve seat having a channel running through the valve seat, and a float floating up and down along the channel to have an open position and a closed position, wherein an air inlet is provided at the bottom of the float, characterized in that: The upper part of the float is provided with a small diameter section and a large diameter section arranged up and down, and the outer diameter of the large diameter section is larger than the outer diameter of the small diameter section; in the open position, the part of the small diameter section located in the channel is provided with an air outlet in the transverse direction, and an air gap is formed between the small diameter section and the inner wall of the channel.

2. A float valve according to claim 1, characterized in that: The float valve also includes a sealing member installed on the float, the sealing member includes a sealing body and a sealing lip provided above the sealing body, the sealing member moves upward with the float to have a first position and a second position abutting against the valve seat, in the first position, an exhaust passage communicating with the air inlet is provided between the sealing lip and the valve seat, in the second position, the sealing lip abuts against the valve seat for sealing.

3. A float valve according to claim 2, characterized in that: The sealing member also includes a protrusion protruding upward along the sealing lip; in the first position, the protrusion abuts against the valve seat, and an exhaust gap exists between the area of ​​the sealing lip where the protrusion is not provided and the valve seat, and the exhaust gap constitutes the exhaust channel; in the second position, the area of ​​the sealing lip where the protrusion is not provided abuts against the valve seat for sealing.

4. A float valve according to claim 2, characterized in that: The sealing lip has a fitting section and a connecting section connecting the fitting section and the sealing body, and the fitting section is provided with an exhaust hole; in the first position, an angle is formed between the fitting section and the valve seat, and the exhaust hole is open to form the exhaust channel; in the second position, the fitting section is flat to abut and seal against the valve seat, and the exhaust hole is closed.

5. A float valve according to claim 1, characterized in that: The float further includes a diameter-reducing section connecting the small-diameter section and the large-diameter section. In the open position, a liquid-sealed gap exists between the diameter-reducing section and the inner wall of the channel.

6. A float valve according to claim 1, characterized in that: The size of the air gap is A, and A satisfies: 0.5mm≦A≦1mm.

7. A float valve according to claim 1, characterized in that: The float valve also includes a sealing member that moves upward with the float to abut against the valve seat. A mounting groove is provided at the lower part of the float, and the sealing member has an anti-slip portion embedded in the mounting groove.

8. A float valve according to claim 1, characterized in that: The small diameter section is provided with a plurality of the air outlets at intervals along its circumference.

9. A float valve according to claim 1, characterized in that: The lower part of the float is provided with a plurality of air inlets along its circumference.

10. A float valve according to claim 1, characterized in that: A step portion is provided inside the channel, and a stop portion is provided in the large diameter section. In the open position, the stop portion abuts against the step portion to limit the downward movement of the float.

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