CN220980418U - Exhaust valve - Google Patents

Abstract

The utility model discloses an exhaust valve, which comprises: the hollow valve body is provided with a water inlet, a water outlet, a sewage outlet and an exhaust port; the flow guiding mechanism is arranged in the valve body and is positioned between the water inlet and the water outlet; the flow guide mechanism is matched with the valve body to form a flow channel which is communicated with the water inlet, the water outlet, the sewage drain and the air outlet, the flow channel at least comprises a first flow channel and a second flow channel, the first flow channel is used for guiding water entering the valve body from the water inlet upwards along a first direction, and the second flow channel is used for guiding water flowing through the first flow channel downwards and/or sideways along a second direction to the water outlet. The exhaust valve provided by the utility model has the advantages of high exhaust efficiency and compact and small structure.

Description

Exhaust valve

Technical Field

The utility model relates to the technical field of valves, in particular to an exhaust valve.

Background

The exhaust valve is mainly arranged in a water supply and return system of a heating, ventilating and air conditioning system, and in the heating, heating and hot water system, gas is gradually separated from water in the circulating process due to the change of water temperature and pressure and gradually gathered together to form bubbles and even gas columns. Because of the continuous replenishment of water, gas is constantly produced. The released gas can directly influence the heating and refrigerating effects of the system, and can damage the pipelines and equipment of the whole system, so that a series of problems such as unheated heating, low efficiency, valve failure, water pump blocking and the like are caused.

It is particularly important to remove air and bubbles in a pipeline in time and efficiently in the running process of the cold and hot air water system. The exhaust valve commonly used in the market at present has larger volume and poor exhaust effect.

For this reason, there is a need to propose an exhaust valve that solves at least one of the above-mentioned problems.

Disclosure of utility model

Aiming at the defects existing in the prior art, the embodiment of the utility model provides the exhaust valve which is high in exhaust efficiency and compact and small in structure.

The specific technical scheme of the embodiment of the utility model is as follows:

An exhaust valve, the exhaust valve comprising: the hollow valve body is provided with a water inlet, a water outlet and an exhaust port; the flow guiding mechanism is arranged in the valve body and is positioned between the water inlet and the water outlet; the flow guide mechanism is matched with the valve body to form a flow channel which is communicated with the water inlet, the water outlet and the air outlet, the flow channel at least comprises a first flow channel and a second flow channel, the first flow channel is used for guiding water entering the valve body from the water inlet upwards along a first direction, and the second flow channel is used for guiding water flowing through the first flow channel downwards and/or sideways along a second direction to the water outlet.

In a preferred embodiment, a first opening and a second opening are arranged in the valve body, the first opening is close to the water inlet, the second opening is close to the water outlet, the position of the first opening is lower than that of the second opening, after fluid flows into the valve body from the water inlet, water in the fluid flows out through the water outlet after sequentially passing through the first opening and the second opening, a flow channel between the first opening and the second opening forms a first flow channel, and a flow channel between the second opening and the water outlet forms a second flow channel.

In a preferred embodiment, the flow guiding mechanism comprises: the first diversion part extends from the top wall of the valve body from top to bottom and forms the first opening at a certain distance from the bottom wall of the valve body; the second flow guiding part extends from the bottom wall of the valve body from bottom to top, and a certain distance is formed between the second flow guiding part and the top wall of the valve body to form the second opening.

In a preferred embodiment, the diversion mechanism further comprises: a flow guiding member arranged between the water inlet and the water outlet, wherein the flow guiding member is provided with a first opening end and a second opening end which are opposite in the height direction, the height of the first opening end is higher than that of the second opening end, and the height of the first opening end is at least higher than the lowest position of the second opening, a flow passage between the first opening end and the second opening end forms the first flow path, and a flow passage between the second opening end and the water outlet forms the second flow path.

In a preferred embodiment, the height of the first open end is not lower than the highest position of the second opening.

In a preferred embodiment, the flow guiding member at least comprises a sealing section and an overflow section from top to bottom along the height direction, wherein a plurality of openings are formed in the overflow section, and the sealing section is at least partially attached to the inner wall of the valve body to divide the interior of the valve body into a water inlet cavity communicated with the water inlet and a water outlet cavity communicated with the water outlet.

In a preferred embodiment, the valve body comprises a main housing provided with the water inlet and the water outlet, a top housing provided with the air outlet, and an air outlet switch for controlling the opening and closing of the air outlet is arranged in the top housing.

In a preferred embodiment, a suspension member is installed in the top shell, the suspension member is provided with a linkage member, the linkage member is connected with the exhaust switch, and when the gas in the top shell is accumulated to a preset volume, the suspension member drives the linkage member to move downwards to open the exhaust switch.

In a preferred embodiment, the suspension element has a hollow structure, which is capable of being suspended in water, and has an opening arranged downwards.

In a preferred embodiment, the top shell is tapered in cross section at a side away from the main shell, the top shell is detachably connected with the main shell, and the top shell and the main shell are provided with a first sealing element at a connecting position.

In a preferred embodiment, the flow cross section of the junction of the top shell and the main shell is greater than the flow cross section of the deflector.

In a preferred embodiment, the flow cross section of the first opening is smaller than the flow cross section of the flow guide.

In a preferred embodiment, the valve body further comprises a bottom shell detachably connected with the main shell, a second sealing piece is arranged at the connection position of the bottom shell and the main shell, and a drain outlet and a drain valve for controlling the opening and the closing of the drain outlet are arranged on the bottom shell.

In a preferred embodiment, a magnet is fixed to the outside of the bottom case, and the magnet faces the second opening end.

In a preferred embodiment, a screen is also provided in the circumferential direction of the flow-through section.

In a preferred embodiment, the deflector is further provided with a circumferential stop near the periphery of the second open end, the periphery of the stop abutting against the inner wall of the bottom shell.

The technical scheme of the utility model has the following remarkable beneficial effects:

According to the exhaust valve provided by the embodiment of the application, the flow guide mechanism is arranged in the valve body, and the valve body and the flow guide mechanism are matched to form the first flow path and the second flow path, so that when fluid entering the valve body flows through the first flow path and the second flow path, the fluid flows upwards and flows downwards or obliquely downwards after being deflected (turned) at least once, and in the deflecting process, the fluid in the first half section (namely the first flow path) flows upwards vertically or obliquely upwards, and because the density of the gas is smaller than that of water, the acceleration of the gas is larger than that of the water, and after the gas-liquid separation stroke is increased by utilizing the first flow path, the relative speed of the water and the air bubbles can be increased, so that the gas (the air bubbles) and the water can be separated conveniently; the fluid in the second half section (namely the second flow path) flows downwards or obliquely downwards in a baffling way, and the relative speed of water and air bubbles is further increased at the moment due to the upward buoyancy of the air bubbles, so that the air bubbles in the water can be efficiently separated from the water, the air bubbles which are separated subsequently move upwards continuously, and the separated water is discharged through the water outlet.

Specific embodiments of the utility model are disclosed in detail below with reference to the following description and drawings, indicating the manner in which the principles of the utility model may be employed. It should be understood that the embodiments of the utility model are not limited in scope thereby. The embodiments of the utility model include many variations, modifications and equivalents within the spirit and scope of the appended claims. Features that are described and/or illustrated with respect to one embodiment may be used in the same way or in a similar way in one or more other embodiments in combination with or instead of the features of the other embodiments.

Drawings

The drawings described herein are for illustration purposes only and are not intended to limit the scope of the present disclosure in any way. In addition, the shapes, proportional sizes, and the like of the respective components in the drawings are merely illustrative for aiding in understanding the present utility model, and are not particularly limited. Those skilled in the art with access to the teachings of the present utility model can select a variety of possible shapes and scale sizes to practice the present utility model as the case may be.

FIG. 1 is a front view of an exhaust valve according to an embodiment of the present application;

FIG. 2 is a left side view of an exhaust valve provided in an embodiment of the present application;

FIG. 3 is a cross-sectional view of the exhaust valve of FIG. 2 taken along line A-A;

FIG. 4 is a front view of a baffle provided in an embodiment of the present application;

FIG. 5 is a B-B cross-sectional view of the baffle of FIG. 4;

fig. 6 is a top view of a baffle according to an embodiment of the present application.

The reference numerals of the application: 1. a valve body;

11. A water inlet;

12. A water outlet;

13. An exhaust port;

10. a main housing;

14. a top shell;

141. A first seal; 15. a bottom case;

151. a second seal; E. a first flow path;

F. A second flow path; 21. a first flow guiding part; 210. a first opening; 22. a second flow guiding part; 220. a second opening;

23. a flow guide;

231. A first open end; 232. a second open end; 233. a packing section;

234. An overcurrent section;

235. A stop portion;

26. A filter screen;

31. A water inlet cavity;

32. a water outlet cavity;

4. a blow-down valve;

51. A suspension;

52. A linkage member;

53. An exhaust switch;

6. And (3) a magnet.

Detailed Description

The technical solution of the present utility model will be described in detail below with reference to the attached drawings and specific embodiments, it should be understood that these embodiments are only for illustrating the present utility model and not for limiting the scope of the present utility model, and various modifications of equivalent forms of the present utility model will fall within the scope of the appended claims after reading the present utility model.

It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

The utility model provides an exhaust valve which is high in exhaust efficiency and compact and small in structure.

Referring to fig. 1, 2 and 3 in combination, an embodiment of the present application provides an exhaust valve, which may include: a hollow valve body 1, wherein a water inlet 11, a water outlet 12 and an air outlet 13 are arranged on the valve body 1; the flow guiding mechanism is arranged in the valve body 1 and is positioned between the water inlet 11 and the water outlet 12; the flow guiding mechanism is matched with the valve body 1 to form a flow passage which is communicated with the water inlet 11, the water outlet 12 and the air outlet 13, the flow passage at least comprises a first flow passage E and a second flow passage F, the first flow passage E is used for guiding water entering the valve body 1 from the water inlet 11 upwards (including obliquely upwards) along a first direction, and the second flow passage F is used for guiding water flowing through the first flow passage E downwards and/or sideways along a second direction to the water outlet 12.

In this embodiment, the exhaust valve may mainly include a valve body 1 and a flow guiding mechanism, wherein the valve body 1 may have a hollow structure, and an overcurrent cavity is formed therein. At least a water inlet 11 for water inflow, a water outlet 12 for water outflow and an air outlet 13 for air exhaustion are provided on the valve body 1.

The flow guiding mechanism is arranged in the valve body 1, a flow passage which is communicated with the water inlet 11, the water outlet 12 and the air outlet 13 is formed by matching the flow guiding mechanism with the valve body 1, and after fluid flows into the valve body 1 from the water inlet 11, the fluid can flow along the direction set by the flow passage. Wherein, as shown in fig. 3, the flow channel may include a first flow channel E and a second flow channel F. The first flow path E is for guiding water entering the valve body 1 from the water inlet 11 in a first direction (including obliquely upward). Specifically, the first direction may be a direction opposite to the gravity direction, and the first direction may also be a direction having an acute angle with the gravity direction, i.e. an oblique direction. The second flow path F is used for guiding the water flowing through the first flow path E downward and/or sideways along the second direction to the water outlet 12. The second direction may be a direction having a certain included angle with the first direction, specifically, the second direction may be a gravity direction or may be an oblique downward direction, and a specific angle of the included angle between the second direction and the first direction may be determined according to a specific matching relationship between the flow guiding mechanism and the valve body 1, which is not limited herein specifically.

In the whole, after the valve body 1 and the flow guiding mechanism are matched to form a first flow path E and a second flow path F, when fluid entering the valve body 1 flows through the first flow path E and the second flow path F, the fluid flows upwards and flows downwards or obliquely downwards after being deflected (turned) at least once, in the deflecting process, the fluid in the first half section (namely the first flow path E) flows upwards vertically or obliquely upwards, because the density of gas is smaller than that of water, the acceleration of the gas is larger than that of water, and after the gas-liquid separation stroke is increased by utilizing the first flow path E, the relative speed of water and bubbles can be increased, so that the gas (bubbles) and the water are separated conveniently; the fluid in the second half section (namely the second flow path F) flows downwards or obliquely downwards in a baffling way, and the relative speed of the water and the air bubbles is further increased at the moment due to the upward buoyancy of the air bubbles, so that the air bubbles in the water can be efficiently separated from the water, the air bubbles which are separated subsequently move upwards continuously, and the separated water is discharged through the water outlet 12.

The present application will be described in detail below with reference to specific drawings and embodiments.

In one embodiment, a first opening 210 and a second opening 220 are disposed in the valve body, the first opening 210 is close to the water inlet 11, the second opening 220 is close to the water outlet 12, the position of the first opening 210 is lower than the position of the second opening 220, after the fluid flows into the valve body from the water inlet 11, the water in the fluid flows out through the water outlet 12 after sequentially passing through the first opening 210 and the second opening 220, a flow channel between the first opening 210 and the second opening 220 forms the first flow channel E, and a flow channel between the second opening 220 and the water outlet 12 forms the second flow channel F.

In this embodiment, a first opening 210 and a second opening 220 are formed inside the valve body, and the height of the first opening 210 is lower than that of the second opening 220, so that the fluid entering the valve body through the water inlet 11 can be baffled inside the valve body, so that the gas and the liquid are fully separated, and the separated water flows out from the water outlet 12.

Specifically, the flow guiding mechanism may include: a first diversion part 21 arranged near the water inlet 11 and a second diversion part 22 arranged near the water outlet 12, wherein the first diversion part 21 extends from the top wall of the valve body 1 from top to bottom and forms a first opening 210 at a certain distance from the bottom wall of the valve body 1; the second flow guiding portion 22 extends from the bottom wall of the valve body 1 from bottom to top, and forms a second opening 220 with a certain distance from the top wall of the valve body 1.

In the present embodiment, the flow guiding mechanism may include a first flow guiding portion 21 and a second flow guiding portion 22 formed inside the valve body 1, and the first flow guiding portion 21 and the second flow guiding portion 22 are matched with the valve body 1 to form the flow passage. Specifically, the first diversion portion 21 may be located near the water inlet 11, and may be a baffle extending from top to bottom from the top wall of the inner surface of the valve body 1. The first flow guide 21 is spaced apart from the bottom wall of the inner surface of the valve body 1 by a certain distance, thereby forming a first opening 210. The second deflector 22 may be located close to the water outlet 12 and may be a baffle extending from the bottom wall of the inner surface of the valve body 1 from bottom to top. The second flow guide 22 is spaced apart from the top wall of the inner surface of the valve body 1 by a certain distance, thereby forming a second opening 220. Of course, the manner of forming the first opening 210 and the second opening 220 is not limited to the above example, but may be other manners, and the present application is not limited thereto. In the whole, the first opening 210 is arranged at a position in the valve body 1, which is lower, the second opening 220 is arranged at a position in the valve body 1, when fluid enters the valve body 1 from the water inlet 11, the fluid flows downwards and then upwards for one time to be deflected, and when the fluid passes through the first opening 210, the fluid flows upwards and then downwards for two times to be deflected, so that the flow path of gas-liquid separation is further prolonged, and bubbles in water can be separated from the water more efficiently.

Referring to fig. 4, 5 and 6 in combination, the flow guiding mechanism may further include: a flow guide arranged between the water inlet 11 and the water outlet 12. When the first flow guiding portion 21 and the second flow guiding portion 22 are disposed in the valve body, the flow guiding member 23 may be specifically disposed between the first flow guiding portion 21 and the second flow guiding portion 22. In the height direction, the flow guiding member 23 has a first opening end 231 and a second opening end 232 which are opposite, the first opening end 231 is higher than the second opening end 232, the first opening end 231 is at least higher than the lowest position of the second opening 220, the flow path between the first opening end 231 and the second opening end 232 forms the first flow path E, and the flow path between the second opening end 232 and the water outlet 12 forms the second flow path F.

In the present embodiment, in order to ensure that the fluid is reliably deflected, a deflector 23 may be provided between the first deflector 21 and the second deflector 22. Specifically, the baffle 23 may be a generally hollow cylindrical structure having a first open end 231 at the top and a second open end 232 at the bottom. Wherein the height of the first opening 231 at the top is at least higher than the lowest position of the second opening 220, so as to ensure that at least part of the fluid flows through the first opening 231 and flow deflection occurs, thereby improving the gas-liquid separation effect.

Further, the height of the first opening 231 is not lower than the highest position of the second opening 220. When the height of the first opening 231 is equal to or higher than the highest position of the second opening 220, it can be ensured that the fluid flows through the first opening 231 and is more fully deflected, so that the gas-liquid separation effect is more fully improved.

In a specific embodiment, the flow guiding member 23 includes at least a sealing section 233 and an overflow section 234 from top to bottom along the height direction, and a plurality of openings are provided on the overflow section 234, and the sealing section 233 is at least partially attached to the inner wall of the valve body 1, so as to divide the interior of the valve body 1 into a water inlet chamber 31 communicating with the first opening 210 and a water outlet chamber 32 communicating with the second opening 220.

In this embodiment, the baffle 23 may include a packing section 233 and an excess flow section 234. Wherein the flow-through section 234 is located at a lower portion when the vent valve is in the installed position shown in fig. 1, it may include a plurality of openings, which may specifically be in the form of apertures having a predetermined size. The openings may be arranged in an array in the circumferential direction of the flow section 234. The flow-through section 234 is opposite to the first opening 210, and the fluid flowing in from the water inlet 11 flows through the first opening 210 and then flows into the guide member 23 through the flow-through section 234.

The packing section 233 is at least partially attached to the inner wall of the valve body 1 (i.e., the outer diameter of the packing section 233 may be equal to or close to the inner diameter of the valve body 1), so as to separate the interior of the valve body 1 up and down, and divide the interior into a water inlet chamber 31 communicating with the first opening 210 and a water outlet chamber 32 communicating with the second opening 220.

Furthermore, a screen 26 may be provided in the circumferential direction of the flow-through section 234, and the screen 26 may be fixed to the inner wall of the flow-through section 234. The screen 26 may be used to intercept particulate impurities in the water stream.

In one embodiment, the valve body 1 may include a main housing 10 provided with the water inlet 11 and the water outlet 12, a top housing 14 provided with the air outlet 13, and an air outlet switch 53 for controlling the opening and closing of the air outlet 13 is provided in the top housing 14.

In this embodiment, the valve body 1 may include a main housing 10 and a top case 14 detachably and sealingly connected to the main housing 10. Wherein the exhaust port 13 may be provided at the top of the top case 14. The gas separated after the gas-liquid separation of the fluid entering the inside of the valve body 1 flows upward and accumulates in the top case 14. When a certain volume is accumulated, the gas discharge switch 53 may be opened to discharge the gas to the outside.

In a specific embodiment, a suspension member 51 is installed in the top case 14, the suspension member 51 is provided with a linkage member 52, the linkage member 52 is connected to the exhaust switch 53, and when the gas in the top case 14 is accumulated to a predetermined volume, the suspension member 51 drives the linkage member 52 to move down to open the exhaust switch 53.

In this embodiment, the top case 14 may be provided therein with a suspension member 51 and a linkage member 52, wherein the suspension member 51 may be suspended in water, and one end of the linkage member 52 may be connected to the suspension member 51, and the other end may be connected to the exhaust switch 53. When the gas in the top shell 14 is gradually accumulated, the suspension member 51 gradually moves downwards, and when the gas is accumulated to a preset volume, the suspension member 51 can drive the linkage member 52 to move downwards, and the exhaust switch 53 is opened for exhausting.

The suspension member 51 has a hollow structure, and is capable of being suspended in water, and the suspension member 51 has an opening disposed downward. The suspension 51 may be an injection molded part having a material density generally greater than water. In order that the suspension member 51 can be suspended in water, the suspension member 51 is provided in a hollow structure such that the average density of the suspension member 51 is close to or equal to that of water. Specifically, the suspension member 51 has an opening at one end, and a hollow portion is provided inwardly at the opening. In order to prevent the suspension 51 from being stably suspended in water, the opening may be provided downward.

In one embodiment, the top case 14 is gradually reduced in cross section at a side away from the main case 10, the top case 14 is detachably connected to the main case 10, and the top case 14 and the main case 10 are provided with a first seal member 141 at a connection position.

In the present embodiment, the cross section of the top shell 14 gradually decreases from bottom to top, and has a tapered structure, so as to facilitate the growth and discharge of captured micro bubbles. A first sealing member 141 may be provided between the top case 14 and the main case 10 for securing sealability of the connection position between the top case 14 and the main case 10. In particular, the first sealing member 141 may be in the form of a sealing ring, however, the specific form of the first sealing member 141 is not limited to the above description, and other modifications may be made by those skilled in the art in light of the technical spirit of the present application, and all the functions and effects achieved by the present application are included in the scope of the present application as long as they are the same or similar to the present application.

In one embodiment, the flow cross-section of the top shell 14 at the interface with the main housing 10 is greater than the flow cross-section of the baffle 23. When the flow cross section of the butt joint position of the top shell 14 and the main shell 10 is controlled to be larger than that of the flow guide piece 23, the flow velocity of the fluid is reduced, so that the gas-liquid separation duration is prolonged, and the gas-liquid separation effect is improved.

In one embodiment, the flow cross-section of the first opening 210 is smaller than the flow cross-section of the baffle 23. When the flow cross section of the first opening 210 is smaller than that of the flow guiding member 23, the fluid flows into the water inlet cavity 31 from the first opening 210 after entering the valve body 1 through the water inlet 11, and the flow velocity of the fluid is reduced in the process of flowing through the flow guiding member 23, so that the gas-liquid separation duration is prolonged, and the gas-liquid separation effect is improved.

In one embodiment, the valve body 1 may further include a bottom shell 15 detachably connected to the main housing 10, a second sealing member 151 is disposed at a connection position of the bottom shell 15 and the main housing 10, and a drain outlet and a drain valve 4 for controlling opening and closing of the drain outlet are disposed on the bottom shell 15.

In the present embodiment, the valve body 1 may further include a bottom case 15, and the bottom case 15 may be detachably connected to the main housing 10. In particular, the detachable connection may be a threaded connection, however, the detachable connection may be other manners, and is not limited to the above description, and other modifications may be made by those skilled in the art in light of the technical spirit of the present application, so long as the functions and effects achieved by the present application are the same or similar to those of the present application, which are all included in the protection scope of the present application.

The connection position of the bottom shell 15 and the main shell 10 may be further provided with a second sealing member 151 for ensuring the tightness of the matching position of the two, and preventing the fluid from leaking from the connection position. In particular, the second sealing member 151 may be in the form of a sealing ring, however, the specific form of the second sealing member 151 is not limited to the above description, and other modifications may be made by those skilled in the art in light of the technical spirit of the present application, and all the functions and effects achieved by the present application are included in the scope of the present application as long as they are the same as or similar to those of the present application.

In one embodiment, a magnet 6 is fixed to the outside of the bottom case 15, and the magnet 6 is opposite to the second opening end 232.

In this embodiment, the magnet 6 may be further disposed outside the bottom case 15, and the magnet 6 may be opposite to the second opening end 232 of the guide member 23, so that rust and magnetic substances that are not filtered out by the filter screen 26 may be adsorbed by the magnet 6. When the exhaust valve is used for a period of time, the magnet 6 can be disassembled, and rust and magnetic substances at the bottom of the bottom shell 15 can be discharged outwards through the blow-down valve 4.

In one embodiment, the flow guide 23 is further provided with a circumferential stop 235 near the periphery of the second opening end 232, and the periphery of the stop 235 abuts against the inner wall of the bottom shell 15.

In the present embodiment, the flow guide 23 may be provided with a circumferential stopper 235 near the outer periphery of the second open end 232, and the outer periphery of the stopper 235 may abut against the inner wall of the bottom case 15. The stop portion 235 may be specifically annular and configured to receive the foreign matter intercepted by the filter 26. After a period of use, the bottom shell 15 can be disassembled, the guide piece 23 is disassembled, and the guide piece 23 is cleaned.

In the whole, the exhaust valve provided by the application has the advantages of high exhaust efficiency, high speed, filtering and magnetic pollution discharge functions, ingenious, compact and small structural design and convenience in installation.

It should be noted that, in the description of the present application, the terms "first," "second," and the like are used for descriptive purposes only and to distinguish between similar objects, and there is no order of preference between them, nor should they be construed as indicating or implying relative importance. Furthermore, in the description of the present application, unless otherwise indicated, the meaning of "a plurality" is two or more.

The foregoing embodiments in the present specification are all described in a progressive manner, and the same and similar parts of the embodiments are mutually referred to, and each embodiment is mainly described in a different manner from other embodiments.

The foregoing is merely a few embodiments of the present utility model, and the embodiments disclosed in the present utility model are merely examples which are used for the convenience of understanding the present utility model and are not intended to limit the present utility model. Any person skilled in the art can make any modification and variation in form and detail of the embodiments without departing from the spirit and scope of the present disclosure, but the scope of the present disclosure is still subject to the scope of the appended claims.

Claims (16)

1. An exhaust valve, comprising:

The hollow valve body is provided with a water inlet, a water outlet and an exhaust port;

the flow guiding mechanism is arranged in the valve body and is positioned between the water inlet and the water outlet;

The flow guide mechanism is matched with the valve body to form a flow channel which is communicated with the water inlet, the water outlet and the air outlet, the flow channel at least comprises a first flow channel and a second flow channel, the first flow channel is used for guiding water entering the valve body from the water inlet upwards along a first direction, and the second flow channel is used for guiding water flowing through the first flow channel downwards and/or sideways along a second direction to the water outlet.

2. The vent valve of claim 1, wherein a first opening and a second opening are disposed in the valve body, the first opening is adjacent to the water inlet, the second opening is adjacent to the water outlet, the first opening is lower than the second opening, after fluid flows into the valve body from the water inlet, water in the fluid flows out through the water outlet after sequentially passing through the first opening and the second opening, a flow passage between the first opening and the second opening forms the first flow path, and a flow passage between the second opening and the water outlet forms the second flow path.

3. The exhaust valve of claim 2, wherein the flow directing mechanism comprises: a first diversion part arranged close to the water inlet and a second diversion part arranged close to the water outlet,

The first flow guide part extends from the top wall of the valve body to the top, and forms the first opening at a certain distance from the bottom wall of the valve body;

the second flow guiding part extends from the bottom wall of the valve body from bottom to top, and a certain distance is formed between the second flow guiding part and the top wall of the valve body to form the second opening.

4. A vent valve as claimed in any one of claims 1 to 3 wherein said flow directing mechanism further comprises: a flow guiding member arranged between the water inlet and the water outlet, wherein the flow guiding member is provided with a first opening end and a second opening end which are opposite in the height direction, the height of the first opening end is higher than that of the second opening end, and the height of the first opening end is at least higher than the lowest position of the second opening, a flow passage between the first opening end and the second opening end forms the first flow passage, and a flow passage between the second opening end and the water outlet forms the second flow passage.

5. The vent valve of claim 4 wherein the height of the first open end is no lower than the highest position of the second opening.

6. The exhaust valve of claim 4, wherein the flow guide member comprises a sealing section and an overflow section from top to bottom along the height direction, wherein a plurality of openings are formed in the overflow section, and the sealing section is at least partially attached to the inner wall of the valve body to divide the interior of the valve body into a water inlet cavity communicated with the water inlet and a water outlet cavity communicated with the water outlet.

7. The vent valve of claim 6, wherein the valve body comprises a main housing provided with the water inlet and the water outlet, a top housing provided with the vent, and a vent switch for controlling the opening and closing of the vent is provided in the top housing.

8. The vent valve of claim 7 wherein a float is mounted in the top housing, the float being provided with a linkage, the linkage being connected to the vent switch, the float driving the linkage to move downwardly to open the vent switch when gas in the top housing accumulates to a predetermined volume.

9. The vent valve of claim 8 wherein the suspension member is hollow and capable of being suspended in water, the suspension member having an opening disposed downwardly.

10. The vent valve of claim 7 wherein the top shell tapers in cross-section on a side away from the main housing, the top shell being removably connected to the main housing, the top shell and the main housing being provided with a first seal at the connection location.

11. The vent valve of claim 10 wherein the flow cross-section of the junction of the top shell and the main housing is greater than the flow cross-section of the baffle.

12. The vent valve of claim 11 wherein the flow cross-section of the first opening is smaller than the flow cross-section of the baffle.

13. The exhaust valve of claim 7, wherein the valve body further comprises a bottom shell detachably connected with the main housing, a second sealing member is arranged at a connection position of the bottom shell and the main housing, and a drain outlet and a drain valve for controlling the opening and the closing of the drain outlet are arranged on the bottom shell.

14. The vent valve of claim 13 wherein a magnet is secured to an exterior of the bottom shell, the magnet being opposite the second open end.

15. The vent valve of claim 13 wherein the flow-through section is further provided circumferentially with a screen.

16. The exhaust valve of claim 15, wherein said deflector member further defines a circumferential stop adjacent a periphery of said second open end, said stop abutting against an inner wall of said bottom shell at a periphery thereof.