Exhaust valve

Abstract

The invention relates to an exhaust valve. The structure of the exhaust valve is further optimized. The exhaust valve comprises a valve body, an exhaust channel is arranged on the valve body, and at least one exhaust port is formed in the exhaust channel; each valve plate is movably arranged on the valve body and is used for opening or closing one exhaust port; the variable-pressure pipe is provided with a variable-pressure channel, the variable-pressure pipe is arranged on the valve body, and when the variable-pressure pipe is arranged on the valve body, the variable-pressure channel is communicated with all the exhaust ports; wherein a medium flows to the exhaust port through the variable-pressure channel, the variable-pressure channel comprises at least two areas, and the cross sectional area of the variable-pressure channel in one area is different from the cross sectional area of the variable-pressure channel in the other area.

Description

Technical Field

[0001] The invention relates to an exhaust valve. Background Art

[0002] The applicant found that the flue has different air pressure values ​​at different heights. Specifically: as the height of the floor decreases, the air pressure value in the flue shows an overall upward trend. The higher the air pressure value, the more difficult it is for the exhaust valve to discharge the oil smoke into the flue. This results in the smoke exhaust difficulty of low-rise residential buildings being higher than that of high-rise residential buildings. In other words, the smoke exhaust difficulty of residential buildings on different floors is different.

[0003] In order to solve the problem of different smoke exhaust difficulties in residences on different floors, the applicant proposed two solutions:

[0004] The first solution is to set a flow equalizer plate and change the exhaust effect of the exhaust valve by adjusting the distance between the flow equalizer plate and the guide plate. For details, please refer to the utility model patent with application number 2021216584982 and patent name "Exhaust volume balanced distribution device and exhaust volume balanced distribution system";

[0005] The second solution is to change the size of the air ducts on different floors. For details, please refer to the utility model patent with application number 2020216098104 and the patent name is the positive pressure zone exhaust volume balanced distribution system;

[0006] However, the above solutions all have defects, including but not limited to: the exhaust valve cannot change its smoke exhaust effect after installation, and the exhaust valve cannot automatically change its smoke exhaust effect. Summary of the invention

[0007] The problem to be solved by the present invention is to provide an exhaust valve and further optimize its structure.

[0008] To solve the above problems, the present invention provides the following technical solutions:

[0009] The exhaust valve includes:

[0010] A valve body, wherein the valve body is provided with an exhaust passage, and the exhaust passage is provided with at least one exhaust port;

[0011] At least one valve plate, each valve plate is movably disposed on the valve body and is used to open or close one of the exhaust ports;

[0012] A transformer tube, wherein a transformer channel is provided on the transformer tube, and the transformer tube is arranged on the valve body. When the transformer tube is arranged on the valve body, the transformer channel is communicated with all exhaust ports;

[0013] The medium flows to the exhaust port through the pressure-changing channel, and the pressure-changing channel includes at least two regions, and the cross-sectional area of ​​the pressure-changing channel in one region is different from the cross-sectional area of ​​the pressure-changing channel in another region.

[0014] It should be noted that in the present invention, the medium includes but is not limited to oil smoke, odorous gas, and water vapor.

[0015] In the present invention, the exhaust valve includes a valve body and a transformer tube, and the transformer tube is arranged on the valve body in two ways, that is, the transformer tube is detachably arranged on the valve body, or the transformer tube is non-detachably arranged on the valve body; when the transformer tube is detachably arranged on the valve body and the exhaust valve is arranged in a building, the transformer tube can be installed on the valve body and / or removed from the valve body; when the transformer tube is non-detachably arranged on the valve body and the exhaust valve is arranged in a building, the transformer tube can be installed on the valve body.

[0016] In the present invention, since at least one exhaust port is provided on the exhaust channel, the cross-sectional area of ​​the exhaust port must be smaller than the cross-sectional area of ​​the exhaust channel. When the cross-sectional area of ​​the exhaust port is less than the cross-sectional area of ​​the exhaust channel, the pressure of the exhaust port is less than the pressure of the exhaust channel. According to the Bernoulli principle, a negative pressure will be formed at the exhaust port, that is, the medium will produce a Venturi effect at the exhaust port.

[0017] Similarly, since the cross-sectional area of ​​the transformer channel in one region is different from the cross-sectional area of ​​the transformer channel in another region, different cross-sectional areas exist at different positions of the transformer channel; when different cross-sectional areas exist at different positions of the transformer channel, the medium has a probability of generating a Venturi effect at the transformer tube. With such a design, the exhaust valve has a probability of forming a secondary negative pressure to achieve an enhanced exhaust effect at the exhaust port (the exhaust effect at the exhaust port includes the medium flow rate flowing through the exhaust port per unit time).

[0018] The preferred structure of the exhaust valve to form secondary negative pressure includes: 1. When the transformer includes a tapered section, a pressure-taking section and a gradually expanding section connected in sequence, the transformer will produce a Venturi effect in the pressure-taking section; 2. When at least two exhaust ports are provided on the exhaust channel, the transformer will produce a Venturi effect.

[0019] In the prior art, the exhaust valve is installed in a building, which usually includes a flue, a wall, a toilet, a kitchen, etc. Taking the flue as an example, when the exhaust valve is installed in the flue, the rear of the exhaust port is located in the flue, and the front of the exhaust port is located outside the flue.

[0020] In the present invention, it is not difficult to infer that the transformer is arranged in front of the exhaust port according to "the transformer is arranged in the valve body and the medium flows to the exhaust port through the transformer channel": the transformer is arranged in front of the exhaust port, that is, when the exhaust valve is arranged in the flue, at least part of the transformer is located outside the flue, which means that the installer does not need to remove the exhaust valve already installed on the building, and can directly arrange the transformer in the valve body. With such a design, the exhaust valve has the following advantages:

[0021] The first advantage is that it can reduce the number of exhaust valve specifications required for the same building; exhaust valves on different floors can use uniform specifications, and only by setting different transformers can the problem of different smoke exhaust difficulties in residences on different floors be solved (i.e., relatively balanced exhaust of exhaust valves on different floors can be achieved);

[0022] The second advantage is that after the exhaust valve is installed, its smoke exhaust effect can be changed through a transformer; the transformer is set in front of the exhaust port. Therefore, there is no need to disassemble the exhaust valve, and the transformer can be installed or replaced with the assistance of external tools. In other words, the transformer is particularly suitable for the renovation of exhaust valves in old communities.

[0023] Furthermore, the cross-sectional area of ​​one region of the pressure-changing channel is A, the sum of the cross-sectional areas of all exhaust ports is B, and BA≤0.35B;

[0024] Alternatively, the cross-sectional area of ​​one region of the pressure-changing channel is A, the sum of the cross-sectional areas of all exhaust ports is B, A>B, and AB≤0.35B.

[0025] In the present invention, when B=A, the pressure at A=the pressure at B. When BA≤0.35B, or AB≤0.35B, the pressure at A is made as close as possible to the pressure at B. With such a design, the pressure conversion between A and B is reduced as much as possible.

[0026] In the present invention, when A>B, the pressure at A>the pressure at B, so that the adsorption force at the exhaust port>the adsorption force at the transformer channel A. With such a design, the adsorption force of the exhaust valve at its exhaust port will reach the maximum, so as to minimize the retention of the medium at the transformer tube.

[0027] Further, another area of ​​the pressure changing channel is located between an area of ​​the pressure changing channel and all the exhaust ports;

[0028] And / or, at least one guide surface is provided in another area of ​​the pressure changing channel, and each guide surface is inclined toward a direction of an exhaust port.

[0029] In the present invention, when another area of ​​the pressure-changing channel is located between one area of ​​the pressure-changing channel and all exhaust ports, the medium will generate a Venturi effect at one area of ​​the pressure-changing channel.

[0030] In the present invention, at least one guide surface is provided in another area of ​​the variable pressure channel, and each guide surface is inclined toward an exhaust port. In this structure, the guide surface is used to guide the medium to flow toward the exhaust port, so as to reduce the time the medium stays in the exhaust valve, especially to reduce the time the oil smoke stays in the exhaust valve.

[0031] Furthermore, the exhaust valve further comprises:

[0032] A first cavity, wherein a real-time air pressure sensor is disposed in the first cavity, and the first cavity is connected to all exhaust ports;

[0033] And / or, a second cavity, wherein an ambient air pressure sensor is disposed in the second cavity, and the second cavity is not connected to all exhaust ports.

[0034] In the present invention, the real-time air pressure sensor is used to detect the real-time air pressure value of the medium flowing through the first cavity, and the ambient air pressure sensor is used to detect the ambient air pressure value in the second cavity, wherein the real-time air pressure sensor and / or the ambient air pressure sensor are used in conjunction with the controller.

[0035] In the present invention, when the first cavity is connected to all exhaust ports and the second cavity is not connected to all exhaust ports, the first cavity is not connected to the second cavity. This design avoids the detection accuracy of the real-time air pressure sensor from being affected by the medium in the second cavity, and avoids the detection accuracy of the ambient air pressure sensor from being affected by the medium in the first cavity.

[0036] Furthermore, when the exhaust valve further includes a second cavity, and at least part of the transformer tube is disposed in the exhaust passage, the outer wall of the transformer tube and the wall of the exhaust passage form the second cavity;

[0037] When the exhaust valve further includes a first cavity, the pressure taking section is provided with a pressure taking hole connected to the pressure changing channel, the real-time air pressure sensor is arranged at the pressure taking hole, and the first cavity includes the pressure changing channel and the pressure taking hole.

[0038] In the present invention, when the second cavity is surrounded by the outer wall of the transformer tube and the wall of the exhaust channel, the second cavity will not be connected to the exhaust port; when a pressure taking hole is provided on the pressure taking section, the pressure taking hole can be used to install a real-time air pressure sensor. Since the pressure taking hole is connected to the transformer channel, the real-time air pressure sensor in the pressure taking hole can receive the real-time air pressure value from the transformer channel.

[0039] Furthermore, the transformer tube is detachably arranged on the valve body, and a sealing ring is arranged between the transformer tube and the valve body;

[0040] And / or, the valve body includes an extension section, the transformer tube is arranged on the extension section, the medium flows to the exhaust port through the extension section, and a mounting structure is arranged on the extension section.

[0041] In the present invention, when the transformer tube is detachably arranged on the valve body and the exhaust valve is arranged on the building, the exhaust valve does not need to be removed from the building, and the installation and removal of the transformer tube can be completed; the sealing ring is used to prevent the medium in the transformer tube from entering the exhaust port.

[0042] Further, the voltage transformer comprises a tapered section, a pressure-taking section and a gradually expanding section connected in sequence, the tapered section, the pressure-taking section and the gradually expanding section are connected in sequence to form the pressure-transforming channel, the valve body comprises a peripheral section and an exhaust ring arranged on the inner side of the peripheral section, the exhaust channel is arranged in the peripheral section, at least part of the exhaust ports are arranged in the exhaust ring, and when at least part of the voltage transformer is arranged in the exhaust channel, the outer wall of the tapered section, the outer wall of the pressure-taking section, the outer wall of the gradually expanding section and the inner wall of the peripheral section enclose a cavity that is not connected to all the exhaust ports;

[0043] And / or, when at least part of the voltage transformer is arranged in the exhaust passage, the medium flows through the voltage transformer passage and then enters the exhaust port.

[0044] In the present invention, when the transformer includes a tapered section, a pressure-taking section and a gradually expanding section connected in sequence, the exhaust valve produces a Venturi effect in the pressure-taking section and forms a primary negative pressure; the exhaust valve produces a Venturi effect at the exhaust port and forms a secondary negative pressure.

[0045] In the present invention, when the medium flows through the pressure-changing channel and enters the exhaust port, the pressure-changing tube can regulate the pressure of the medium entering all the exhaust ports.

[0046] The exhaust passage is provided with an opening on one side of the valve body, all exhaust ports are provided on the other side of the valve body located on the exhaust passage, and the transformer is inserted into the exhaust passage through the opening;

[0047] And / or, the exhaust valve also includes a driver, a transmission mechanism and a limiting mechanism, the transmission mechanism includes a driving gear, a driven gear and at least one intermediate gear, the driving gear is arranged on the driver, the driving gear is meshed with an intermediate gear, one of the intermediate gears is meshed with the driven gear, the driven gear is arranged on one of the valve plates, after the driver drives an intermediate gear to rotate through the driving gear, one of the intermediate gears drives the driven gear to rotate, so that the driven gear drives the valve plate to move relative to the valve body; wherein, the limiting mechanism is arranged on the transmission mechanism and the valve body to limit the rotation angle of the driven gear.

[0048] Furthermore, the exhaust valve further comprises:

[0049] Real-time air pressure sensor, used to detect real-time air pressure value;

[0050] A driver, the driver being arranged on the valve body;

[0051] A transmission mechanism, wherein at least one valve plate is connected to the driver through the transmission mechanism;

[0052] A controller, wherein the real-time air pressure sensor is electrically connected to the controller, and after the real-time air pressure sensor converts the detected real-time air pressure value into an electrical signal and transmits it to the controller, the controller controls the driver to work or stop working;

[0053] After the controller controls the driver to work, the driver drives all valve plates to move relative to the valve body through the transmission mechanism to change the opening of each valve plate relative to one of the exhaust ports.

[0054] In the present invention, the controller controls the driver to work or stop working by receiving the real-time air pressure value from the real-time air pressure sensor. With such a design, the exhaust valve has the function of automatically changing its exhaust effect.

[0055] Furthermore, the exhaust valve further comprises:

[0056] Real-time air pressure sensor, used to detect real-time air pressure value;

[0057] Ambient air pressure sensor, used to detect ambient air pressure value;

[0058] A driver, the driver being arranged on the valve body;

[0059] A transmission mechanism, wherein at least one valve plate is connected to the driver through the transmission mechanism;

[0060] A controller, wherein the real-time air pressure sensor and the ambient air pressure sensor are electrically connected to the controller respectively, and after the real-time air pressure sensor converts the detected real-time air pressure value into an electrical signal and transmits it to the controller, and the ambient air pressure sensor converts the detected ambient air pressure value into an electrical signal and transmits it to the controller, the controller controls the driver to work or stop working according to the difference between the real-time air pressure value and the ambient air pressure value;

[0061] Wherein, after the controller controls the driver to work, the driver drives all valve plates to move relative to the valve body through the transmission mechanism to change the opening of each valve plate relative to one of the exhaust ports;

[0062] Or, the exhaust valve further comprises:

[0063] Real-time air pressure sensor, used to detect real-time air pressure value;

[0064] Ambient air pressure sensor, used to detect ambient air pressure value;

[0065] A driver, the driver being arranged on the valve body;

[0066] A transmission mechanism, wherein at least one valve plate is connected to the driver through the transmission mechanism;

[0067] A controller, wherein the controller presets a standard deviation value, the real-time air pressure sensor and the ambient air pressure sensor are electrically connected to the controller respectively, after the real-time air pressure sensor converts the detected real-time air pressure value into an electrical signal and transmits it to the controller, and after the ambient air pressure sensor converts the detected ambient air pressure value into an electrical signal and transmits it to the controller, the controller obtains a real-time difference value through the real-time air pressure value and the ambient air pressure value, and the controller controls the driver to work or stop working according to the difference between the real-time difference value and the standard deviation value;

[0068] Wherein, after the controller controls the driver to work, the driver drives all valve plates to move relative to the valve body through the transmission mechanism to change the opening of each valve plate relative to one of the exhaust ports;

[0069] Or, the exhaust valve further comprises:

[0070] Real-time air pressure sensor, used to detect real-time air pressure value;

[0071] A driver, the driver being arranged on the valve body;

[0072] A transmission mechanism, wherein at least one valve plate is connected to the driver through the transmission mechanism;

[0073] A controller, wherein the controller presets a standard value, the real-time air pressure sensor is electrically connected to the controller, and after the real-time air pressure sensor converts the detected real-time air pressure value into an electrical signal and transmits it to the controller, the controller controls the driver to work or stop working according to the difference between the real-time air pressure value and the standard value;

[0074] After the controller controls the driver to work, the driver drives all valve plates to move relative to the valve body through the transmission mechanism to change the opening of each valve plate relative to one of the exhaust ports.

[0075] In the present invention, the controller can compare the real-time air pressure value of the real-time air pressure sensor with at least one of the ambient air pressure value of the ambient air pressure sensor, the controller preset standard deviation value and the controller preset standard value to output a control signal of the driver. With such a design, the controller can control the opening of the exhaust port on different floors.

[0076] Further, the exhaust valve includes a driver, and at least one valve plate includes two valve plates, one of which is provided with a driving shaft detachably provided on the valve body, the driving shaft is provided with a first gear, and the other valve plate is provided with a driven shaft detachably provided on the valve body, the driven shaft is provided with a second gear meshing with the first gear, wherein the driving shaft is directly or indirectly connected to the driver, and when the driver is working, the driver will drive the driving shaft to rotate, and during the rotation of the driving shaft, the first gear drives the second gear to rotate, so that the two valve plates rotate synchronously relative to the valve body;

[0077] And / or, the transformer tube is detachably inserted in the exhaust passage, when the transformer tube is inserted in the exhaust passage, at least a part of the transformer tube is located outside the exhaust passage, and a positioning structure is provided between the transformer tube and the valve body.

[0078] In the present invention, when the first gear meshes with the second gear, the driving shaft and the driven shaft will move synchronously to achieve the same opening of the two valve plates. When the openings of the two valve plates are the same, the pressures from the medium on the two valve plates are substantially the same. With such a design, the accuracy of the two valve plates in opening the exhaust port is improved, and the reliability of the synchronous movement of the two valve plates is improved.

[0079] In the present invention, when the transformer tube is detachably inserted into the exhaust passage, the exhaust valve does not need to be removed from the building, so as to achieve the change of the smoke exhaust effect of the exhaust valve.

[0080] In the present invention, the positioning structure provides axial and / or radial positioning for the transformer tube on the valve body.

[0081] Further, the valve body comprises a main body, a first mounting seat and a second mounting seat, the first mounting seat and the second mounting seat are respectively detachably arranged on the main body, when one of the valve plates is provided with a driving shaft detachably arranged on the valve body, and the other valve plate is provided with a driven shaft detachably arranged on the valve body, the first mounting seat is arranged on the main body and the two of them form a first mounting hole for mounting the driving shaft and a second mounting hole for mounting the driven shaft, and the second mounting seat is arranged on the main body and the two of them form a first mounting hole for mounting the driving shaft and a second mounting hole for mounting the driven shaft;

[0082] And / or, the valve body is provided with a detachable external pipe, and the valve body can be connected to the smoke exhaust pipe of the range hood through the external pipe.

[0083] In the present invention, when the valve body includes the main body, the first mounting seat and the second mounting seat, the valve plate is detachable. Such a design facilitates replacement of at least one of the valve plate, the driving shaft and the driven shaft.

[0084] In the present invention, when a detachable external pipe is provided on the valve body, the exhaust valve can be fixedly connected to exhaust pipes of different sizes through the external pipe.

[0085] Furthermore, each valve plate is rotatably connected to the valve body via a rotating shaft, and the valve body comprises a main body and at least two mounting seats, each mounting seat is detachably arranged on the main body, and when the mounting seat is arranged on the main body, the mounting seat and the main body form a mounting hole for mounting the rotating shaft;

[0086] And / or, the exhaust port is arranged obliquely, and when the exhaust valve is installed on the building, the exhaust port opens downward, and the angle between the exhaust port and the horizontal plane is less than 90°.

[0087] Further, when the exhaust valve further includes a driver, a transmission mechanism and a limiting mechanism, and the transmission mechanism includes a driving gear, a driven gear and at least one intermediate gear, the limiting mechanism includes a limiting shaft and a limiting groove, the limiting shaft is provided on the driven gear, the valve body further includes a plate body, the limiting groove is provided on the plate body, the limiting shaft is inserted into the limiting groove, and the driven gear drives the limiting shaft to move along the limiting groove;

[0088] Or, when the exhaust valve further includes a driver, a transmission mechanism and a limit mechanism, and the transmission mechanism includes a driving gear, a driven gear and at least one intermediate gear, the limit mechanism includes a limit shaft, a limit groove, a first limit switch and a second limit switch, the limit shaft is arranged on the driven gear, the valve body further includes a plate body, the limit groove, the first limit switch and the second limit switch are arranged on the plate body, the limit shaft is inserted into the limit groove, the driven gear drives the limit shaft to move along the limit groove, and can make the limit shaft contact the first limit switch or the second limit switch;

[0089] Alternatively, when the exhaust valve further includes a driver, a transmission mechanism and a limit mechanism, and the transmission mechanism includes a driving gear, a driven gear and at least one intermediate gear, the limit mechanism includes an encoder, the encoder is provided on the driver, and the encoder is electrically connected to the controller.

[0090] The exhaust valve is the exhaust valve described in any one of the above technical solutions, comprising the following exhaust volume adjustment steps:

[0091] The controller presets the standard deviation value;

[0092] The real-time air pressure sensor detects a real-time air pressure value and converts it into an electrical signal, and the real-time air pressure sensor transmits the electrical signal of the real-time air pressure value to the controller; the ambient air pressure sensor detects an ambient air pressure value and converts it into an electrical signal, and the electrical signal of the ambient air pressure value of the ambient air pressure sensor is transmitted to the controller, and the controller calculates a real-time difference value according to the received real-time air pressure value and the ambient air pressure value;

[0093] The controller compares the real-time difference with the standard difference to determine whether to control the driver to work;

[0094] If the controller controls the driver to work, the driver drives all valve plates to move relative to the valve body through the transmission mechanism to change the opening of each valve plate relative to one of the exhaust ports; if the controller controls the driver to stop working, the opening of each valve plate relative to one of the exhaust ports will not change;

[0095] Or, including the following exhaust volume adjustment steps:

[0096] The real-time air pressure sensor detects the real-time air pressure value and converts it into an electrical signal, and the real-time air pressure sensor transmits the electrical signal of the real-time air pressure value to the controller, and the ambient air pressure sensor detects the ambient air pressure value and converts it into an electrical signal, and the electrical signal of the ambient air pressure value of the ambient air pressure sensor is transmitted to the controller;

[0097] The controller determines whether to control the driver to work according to the difference between the real-time air pressure value and the ambient air pressure value;

[0098] If the controller controls the driver to work, the driver drives all valve plates to move relative to the valve body through the transmission mechanism to change the opening of each valve plate relative to one of the exhaust ports; if the controller controls the driver to stop working, the opening of each valve plate relative to one of the exhaust ports will not change;

[0099] Or, including the following exhaust volume adjustment steps:

[0100] The controller presets standard values;

[0101] The real-time air pressure sensor detects the real-time air pressure value and converts it into an electrical signal, and the real-time air pressure sensor transmits the electrical signal of the real-time air pressure value to the controller;

[0102] The controller determines whether to control the driver to work according to the difference between the real-time air pressure value and the standard value;

[0103] If the controller controls the driver to work, the driver drives all valve plates to move relative to the valve body through the transmission mechanism to change the opening of each valve plate relative to one of the exhaust ports; if the controller controls the driver to stop working, the opening of each valve plate relative to one of the exhaust ports will not change.

[0104] Furthermore, at least one first magnetic member is disposed on the valve body, and at least one second magnetic member is disposed on the valve plate. When each valve plate is movably disposed on the valve body to close one of the exhaust ports, the second magnetic member is adsorbed on the first magnetic member.

[0105] Or, the valve body is provided with at least one first step hole, the first step hole is provided with a first magnetic member, the first step hole includes a first step surface arranged vertically, the first magnetic member can abut against the first step surface, and the first step surface faces away from the valve plate; the valve plate is provided with at least one second magnetic member, when each valve plate is movably provided on the valve body to close one of the exhaust ports, the second magnetic member is adsorbed on the first magnetic member;

[0106] Or, at least one first magnetic member is provided on the valve body; at least one second step hole is provided on the valve plate, the second step hole is provided with a second magnetic member, the second step hole includes a second step surface arranged vertically, the second magnetic member can abut against the second step surface, and the second step surface faces away from the transformer;

[0107] Alternatively, the exhaust valve also includes a connecting rod and an elastic member, one end of the connecting rod is rotatably connected to a valve plate, the other end of the connecting rod is rotatably connected to the valve body, the elastic member is arranged between the connecting rod and the valve body, and the elastic member is used to drive the connecting rod to drive a valve plate to close the exhaust port.

[0108] In the present invention, at least one first magnetic member is provided on the valve body, and at least one second magnetic member is provided on the valve plate. When each valve plate is movably provided on the valve body to close one of the exhaust ports, the second magnetic member is attracted to the first magnetic member. This structure effectively increases the reliability of the valve plate closing the exhaust port.

[0109] In addition, when the exhaust port is tilted and opens downward, the valve plate can be accelerated to move toward the first magnetic member through the second magnetic member. BRIEF DESCRIPTION OF THE DRAWINGS

[0110] Figure 1 A three-dimensional diagram of an exhaust valve in a preferred embodiment of the present invention;

[0111] Figure 2 It is a three-dimensional diagram of the exhaust valve in the preferred embodiment of the present invention (the valve plate is omitted);

[0112] Figure 3 A top view of an exhaust valve in a preferred embodiment of the present invention;

[0113] Figure 4 for Figure 3 Sectional view at AA in the middle;

[0114] Figure 5It is a top view of the exhaust valve in a preferred embodiment of the present invention (housing is omitted);

[0115] Figure 6 for Figure 5 Sectional view at the middle BB;

[0116] Figure 7 A rear view of an exhaust valve in a preferred embodiment of the present invention;

[0117] Figure 8 for Figure 7 Sectional view at CC;

[0118] Fig. 9 A three-dimensional diagram of a transformer in a preferred embodiment of the present invention;

[0119] Fig.10 A three-dimensional diagram of a controller, a real-time air pressure sensor and an ambient air pressure sensor in a preferred embodiment of the present invention;

[0120] Fig.11 A three-dimensional diagram of a valve body in a preferred embodiment of the present invention;

[0121] Fig.12 A first stereoscopic diagram of a driver and a transmission mechanism in a preferred embodiment of the present invention;

[0122] Fig.13 This is a second stereoscopic view of the driver and transmission mechanism in a preferred embodiment of the present invention. DETAILED DESCRIPTION

[0123] The technical solutions of the embodiments of the present invention are explained and described below in conjunction with the drawings of the embodiments of the present invention, but the following embodiments are only preferred embodiments of the present invention, not all. Based on the embodiments in the implementation mode, other embodiments obtained by those skilled in the art without creative work are all within the protection scope of the present invention.

[0124] See also Figure 1 , Figure 2 and Fig. 9 , the exhaust valve includes:

[0125] A valve body 1, wherein the valve body 1 is provided with an exhaust passage 11, and the exhaust passage 11 is provided with at least one exhaust port 111;

[0126] At least one valve plate 2, each valve plate 2 is movably disposed on the valve body 1 and is used to open or close one of the exhaust ports 111; a sealing ring (not marked) is disposed on the valve plate 2, and the valve plate 2 abuts against the valve body 1 through the sealing ring so that the valve plate 2 closes the exhaust port 111;

[0127] A transformer 3, on which a transformer channel 31 is provided, and the transformer 3 is arranged on the valve body 1. When the transformer 3 is arranged on the valve body 1, the transformer channel 31 is communicated with all the exhaust ports 111;

[0128] Among them, the medium (the medium includes but is not limited to oil smoke, odorous gas, and water vapor) flows to the exhaust port 111 through the variable pressure channel 31, and the variable pressure channel 31 includes at least two areas, and the cross-sectional area of ​​the variable pressure channel 31 in one area is different from the cross-sectional area of ​​the variable pressure channel in another area.

[0129] In the present invention, when the medium flows through the pressure-changing channel 31 and enters the exhaust port 111 , the pressure-changing tube 3 can regulate the pressure of the medium entering all the exhaust ports 111 .

[0130] See also Figure 7 , Figure 8 and Fig. 9 , discloses a preferred structure of a transformer 3, that is, the transformer 3 includes a tapered section 301, a pressure-taking section 302 and a gradually expanding section 303 connected in sequence, the tapered section 301, the pressure-taking section 302 and the gradually expanding section 303 are connected in sequence to form a pressure-changing channel 31, the valve body 1 includes an outer section 101 and an exhaust ring 102 arranged on the inner side of the outer section 101, the exhaust channel 11 is arranged in the outer section 101, and at least part of the exhaust ports 111 are arranged in the exhaust ring 102. When at least part of the transformer 3 is arranged in the exhaust channel 11, the outer wall of the tapered section 301, the outer wall of the pressure-taking section 302, the outer wall of the gradually expanding section 303, and the inner wall of the outer section 101 form a cavity that is not connected to all the exhaust ports 111.

[0131] When the transformer 3 includes a tapered section 301, a pressure-taking section 302 and a gradually expanding section 303 connected in sequence, the exhaust valve generates a Venturi effect in the pressure-taking section 302 and forms a primary negative pressure; the exhaust valve generates a Venturi effect at the exhaust port 111 and forms a secondary negative pressure.

[0132] It should be noted that: "The outer wall of the tapered section 301, the outer wall of the pressure section 302, the outer wall of the gradually expanding section 303, and the inner wall of the peripheral section 101 form a cavity that is not connected to all the exhaust ports 111" is mainly intended for the purpose of the exhaust valve installed on the building to form a cavity that is not connected to all the exhaust ports 111 during the process of discharging the medium, that is, the first cavity 20 is not connected to the second cavity 10. However, after the exhaust valve is removed from the building, or the oil fume pipe on the range hood is separated from the exhaust valve, the first cavity 20 can also be connected to the second cavity 10.

[0133] The transformer 3 may also include other structures. For example, in other embodiments of the present invention, the transformer includes a tapered section and a pressure-taking section connected in sequence; or, the transformer includes a pressure-taking section and a gradually expanding section connected in sequence; or, the transformer includes a gradually expanding section, a pressure-taking section and a tapered section connected in sequence; or, the transformer includes a tapered section, a pressure-taking section, a gradually expanding section and a connecting section connected in sequence.

[0134] In addition, the exhaust port 111 may also be disposed at different positions of the valve body 1. For example, in other embodiments of the present invention, at least part of the exhaust port may be surrounded by the peripheral section and the exhaust ring; or, at least part of the exhaust port may be disposed in the peripheral section.

[0135] See also Figure 3 and Figure 4 When at least part of the transformer tube 3 is disposed in the exhaust channel 11, the medium flows through the transformer channel 31 and then enters the exhaust port 111. Specifically, the medium flows through the transformer channel 31 and the exhaust channel 11 in sequence and then enters the exhaust port 111. In other embodiments of the present invention, when at least part of the transformer tube is disposed in the exhaust channel, the medium flows through the transformer channel and then directly enters the exhaust port.

[0136] In the present invention, the exhaust valve includes a valve body 1 and a transformer tube 3, a sealing ring (not marked) is provided between the transformer tube 3 and the valve body 1, and the transformer tube is provided on the valve body in two ways, that is, the transformer tube is detachably provided on the valve body, or the transformer tube is non-detachably provided on the valve body; when the transformer tube is detachably provided on the valve body and the exhaust valve is provided in a building, the transformer tube can be installed on the valve body and / or removed from the valve body; when the transformer tube is non-detachably provided on the valve body and the exhaust valve is provided in a building, the transformer tube can be installed on the valve body.

[0137] In the present invention, since at least one exhaust port 111 is provided on the exhaust channel 11, the cross-sectional area of ​​the exhaust port 111 must be smaller than the cross-sectional area of ​​the exhaust channel 11. When the cross-sectional area of ​​the exhaust port 111 is smaller than the cross-sectional area of ​​the exhaust channel 11, the pressure of the exhaust port 111 is smaller than the pressure of the exhaust channel 11. According to the Bernoulli principle, a negative pressure will be formed at the exhaust port 111, that is, the medium will produce a Venturi effect at the exhaust port 111. With such a design, the medium can be quickly discharged from the exhaust port 111.

[0138] Similarly, since the cross-sectional areas of the tapered section 301, the pressure section 302 and the expanding section 303 are all different, according to the Bernoulli principle, a negative pressure will be formed at the pressure section 302, that is, the medium will produce a Venturi effect at the pressure section 302. With this design, the medium can be quickly discharged from the pressure section 302, that is, the medium can be accelerated twice in the exhaust valve.

[0139] See also Fig.11The exhaust passage 11 is provided with an opening 113 on one side of the valve body 1, and all exhaust ports 111 are provided on the other side of the valve body 1 on the exhaust passage 11. The transformer 3 is inserted into the exhaust passage 11 through the opening 113. When the exhaust valve is provided in a building, the transformer 3 can exit the exhaust passage 11 through the opening 113. This structure has the following advantages:

[0140] 1. It can reduce the number of exhaust valve specifications required for the same building; exhaust valves on different floors can use uniform specifications, and only by setting different transformers 3, the problem of different smoke exhaust difficulties in residences on different floors can be solved;

[0141] 2. After the exhaust valve is installed, its smoke exhaust effect is changed by the transformer tube 3; the transformer tube 3 is arranged in front of the exhaust port 111. Therefore, there is no need to disassemble the exhaust valve, and the transformer tube 3 can be installed or replaced with the assistance of external tools. In other words, the transformer tube 3 is particularly suitable for the exhaust valve modification in old communities.

[0142] In the present invention, the direction of the cross section is Figure 5 However, when the exhaust port 111 is tilted, the cross section of the exhaust port 111 is consistent with its tilt direction. Figure 5 , Figure 6 and Fig. 9 , the cross-sectional area of ​​the pressure-changing channel 31 at the pressure-taking section 302 is A, the sum of the cross-sectional areas of all the exhaust ports 111 is B, A>B, and AB≤0.35B; when A>B, the pressure at A>the pressure at B, so as to achieve the adsorption force at the exhaust port>the adsorption force at the pressure-changing channel A; this structure makes the adsorption force of the exhaust valve at its exhaust port reach the maximum, so as to minimize the medium from being retained at the pressure-changing tube. In other embodiments of the present invention, the cross-sectional area of ​​one area of ​​the pressure-changing channel is A, the sum of the cross-sectional areas of all the exhaust ports is B, BA≤0.35B; when B=A, the pressure at A=the pressure at B. When BA≤0.35B, or AB≤0.35B, the pressure at A is made as close to the pressure at B as possible.

[0143] In the present invention, another area of ​​the pressure changing channel 31 is located between an area of ​​the pressure changing channel 31 and all the exhaust ports 111. For details, see Figure 4 , Fig. 9 and Fig.11, another area of ​​the pressure-changing channel 31 is the gradually expanding section 303, one area of ​​the pressure-changing channel 31 is the pressure-taking section 302, the gradually expanding section 303 is located between the pressure-taking section 302 and all the exhaust ports 111, and when the gradually expanding section 303 is located between the pressure-taking section 302 and all the exhaust ports 111, the medium generates a Venturi effect at the pressure-taking section 302. In other embodiments of the present invention, another area of ​​the pressure-changing channel and one area of ​​the pressure-changing channel may change with the structure of the transformer tube.

[0144] See also Figure 1 , Figure 7 and Figure 8 , at least one guide surface 112 is provided in another area of ​​the pressure-changing channel 31, and each guide surface 112 is inclined toward an exhaust port 111. Specifically, the valve body 1 includes a peripheral section 101, an exhaust ring 102, and a guide surface 112. The guide surface 112 is provided on the exhaust ring 102. When at least part of the pressure-changing tube 3 is provided in the exhaust channel 11, at least part of the gradually expanding section 303 is inserted in the gradually expanding section 303, so that at least one guide surface 112 is provided in another area of ​​the pressure-changing channel 31. In this structure, the guide surface 112 is used to guide the medium to flow toward the exhaust port 111, so as to reduce the time the medium stays in the exhaust valve, especially to reduce the time the oil smoke stays in the exhaust valve.

[0145] See also Figure 4 , Figure 6 and Fig.10 The exhaust valve further includes a first cavity 20 and a second cavity 10. A real-time air pressure sensor 7 is provided in the first cavity 20, and the first cavity 20 is connected to all the exhaust ports 111. An ambient air pressure sensor 8 is provided in the second cavity 10, and the second cavity 10 is not connected to all the exhaust ports 111. The real-time air pressure sensor 7 is used to detect the real-time air pressure value of the medium flowing through the first cavity 20, and the ambient air pressure sensor 8 is used to detect the ambient air pressure value in the second cavity 10, wherein the real-time air pressure sensor 7 and the ambient air pressure sensor 8 are used in conjunction with the controller 6.

[0146] In other embodiments of the present invention, the exhaust valve also includes a first cavity, in which a real-time air pressure sensor is provided, and the first cavity is connected to all exhaust ports; or, the exhaust valve also includes a second cavity, in which an ambient air pressure sensor is provided, and the second cavity is not connected to all exhaust ports.

[0147] See also Figure 2 , Figure 4 and Figure 6When the first cavity 20 is connected to all the exhaust ports 111 and the second cavity 10 is not connected to all the exhaust ports 111, the first cavity 20 is not connected to the second cavity 10. This structure prevents the detection accuracy of the real-time air pressure sensor 7 from being affected by the medium in the second cavity 10, and prevents the detection accuracy of the ambient air pressure sensor 8 from being affected by the medium in the first cavity 20.

[0148] See also Figure 6 and Figure 8 When the exhaust valve further includes a second cavity 10 and at least a portion of the transformer tube 3 is disposed in the exhaust passage 11 , the outer wall of the transformer tube 3 and the wall of the exhaust passage 11 form the second cavity 10 .

[0149] See also Figure 4 and Fig. 9 When the exhaust valve also includes the first cavity 20, a pressure taking hole 32 connected to the pressure changing channel 31 is provided on the pressure taking section 302, the real-time air pressure sensor 7 is arranged at the pressure taking hole 32, and the first cavity 20 includes the pressure changing channel 31 and the pressure taking hole 32.

[0150] In the present invention, when the second cavity 10 is surrounded by the outer wall of the transformer tube 3 and the wall of the exhaust channel 11, the second cavity 10 will not be connected to the exhaust port 111; when the pressure taking hole 32 is provided on the pressure taking section 302, the pressure taking hole 32 can be used to install the real-time air pressure sensor 7. Since the pressure taking hole 32 is connected to the pressure changing channel 31, the real-time air pressure sensor 7 in the pressure taking hole 32 can receive the real-time air pressure value from the pressure changing channel 31. The real-time air pressure sensor 7 located in the pressure taking hole 32 can avoid the medium moving in the pressure changing channel 31 from causing large value fluctuations to the real-time air pressure sensor 7.

[0151] See also Figure 1 and Figure 8 , the transformer tube 3 is detachably provided on the valve body 1, specifically: the transformer tube 3 is interference fit with the valve body 1. When the transformer tube 3 is detachably provided on the valve body 1, and the exhaust valve is provided on a building, the exhaust valve does not need to be removed from the building, and the installation and removal of the transformer tube can also be completed. In other embodiments of the present invention, the transformer tube is threadedly connected to the valve body; or, the transformer tube is snap-fitted to the valve body.

[0152] from Figure 3 and Figure 4 It can be seen that the valve body 1 includes an extension section (not marked), the transformer tube 3 is arranged in the extension section, the medium flows to the exhaust port 111 through the extension section, and a mounting structure 12 is arranged on the extension section. Specifically, the mounting structure 12 includes a vertical groove and a horizontal groove, and the horizontal groove is arranged at the end of the vertical groove. The mounting structure 12 is used to install the exhaust pipe from the range hood or the external pipe.

[0153] Figure 7 , Figure 8and Fig.13 The exhaust valve further comprises a driver 4, a transmission mechanism 5 and a limit mechanism (not marked), the transmission mechanism 5 comprises a driving gear 51, a driven gear 52 and at least one intermediate gear 53, the driving gear 51 is arranged on the driver 4, the driving gear 51 is meshed with an intermediate gear 53, one of the intermediate gears 53 is meshed with the driven gear 52, the driven gear 52 is arranged on one of the valve plates 2, after the driver 4 drives an intermediate gear 53 to rotate through the driving gear 51, one of the intermediate gears 53 drives the driven gear 52 to rotate, so that the driven gear 52 drives the valve plate 2 to move relative to the valve body 1. In other embodiments of the present invention, there may be one intermediate gear, or two intermediate gears; or, the transmission mechanism comprises a driving gear and a driven gear, the driving gear is arranged on the driver, and the driven gear is arranged on the valve plate; or, the transmission mechanism comprises a driving wheel, and the valve plate is arranged on the driving wheel.

[0154] In addition, in other embodiments of the present invention, the driver can be a motor, the transmission mechanism includes a gear and a rack, the rack is provided on the valve plate, and the gear is provided on the driver; or, the driver includes two motors, the transmission mechanism includes a chain, one end of the chain is provided on one motor, the other end of the chain is provided on another motor, and the valve plate is provided on the chain.

[0155] See also Figure 8 The valve body 1 includes a main body (not marked) and a shell 14, and the shell 14 is arranged on the main body. When the shell 14 is arranged on the main body, the shell 14 and the main body form a third cavity 30, and the driver 4, the transmission mechanism 5 and the limit mechanism are arranged in the third cavity 30.

[0156] See also Fig.12The limit mechanism includes a limit shaft 91, a limit groove 92, a first limit switch 93 and a second limit switch 94. The limit shaft 91 is arranged on the driven gear 52. The valve body 1 also includes a plate body 15. The limit groove 92, the first limit switch 93 and the second limit switch 94 are arranged on the plate body 15. The limit shaft 91 is inserted into the limit groove 92. The driven gear 52 drives the limit shaft 91 to move along the limit groove 92 to control the opening of each valve plate 2 relative to one of the exhaust ports 111 (the opening of the exhaust port 111 is the rotation angle of the valve plate 2 relative to the valve body 1); the first limit The switch 93 and the second limit switch 94 are arranged on both sides of the limit slot 92 of the plate body 15. The first limit switch 93 and the second limit switch 94 are electrically connected to the controller 6 respectively. The driven gear 52 drives the limit shaft 91 to move along the limit slot 92, so that the limit shaft 91 can contact the first limit switch 93 or the second limit switch 94. When the limit shaft 91 contacts the first limit switch 93 or the second limit switch 94, the first limit switch 93 or the second limit switch 94 will transmit an electrical signal to the controller 6, so that the controller 6 controls the driver 4 to work or stop working. In this structure, the limit mechanism is arranged on the transmission mechanism 5 and the valve body 1 to limit the rotation angle of the driven gear 52. In other embodiments of the present invention, the limit mechanism includes a limit shaft and a limit groove, the limit shaft is arranged on the valve body, and the limit groove is arranged on the intermediate gear or the driven gear; or, the limit mechanism includes a limit shaft, a first limit switch and a second limit switch, the limit shaft is arranged on the driven gear, the first limit switch and the second limit switch are arranged on the valve body, and the first limit switch and the second limit switch are electrically connected to the controller respectively; or, the limit mechanism includes an encoder, the encoder is arranged on the driver, and the encoder is electrically connected to the controller; or, the limit mechanism includes a limit shaft and a limit groove, the limit shaft is arranged on the driven gear, the valve body also includes a plate body, the limit groove is arranged on the plate body, the limit shaft is inserted in the limit groove, and the driven gear drives the limit shaft to move along the limit groove.

[0157] In the present invention, the limiting mechanism is used to prevent the valve plate from rotating beyond a predetermined stroke, and is also used to calibrate the driver (mainly to calibrate the rotation angle and number of turns of the motor output shaft).

[0158] See also Figure 1 , Figure 4 and Figure 6 , the exhaust valve also includes:

[0159] A real-time air pressure sensor 7, used to detect the real-time air pressure value;

[0160] A driver 4, which is arranged on the valve body 1;

[0161] A transmission mechanism 5, wherein at least one valve plate 2 is connected to a driver 4 via the transmission mechanism 5;

[0162] The controller 6 is provided with an external interface 61 for connecting a data line, and the real-time air pressure sensor 7 is electrically connected to the controller 6. After the real-time air pressure sensor 7 converts the detected real-time air pressure value into an electrical signal and transmits it to the controller 6, the controller 6 controls the driver 4 to work or stop working;

[0163] After the controller 6 controls the driver 4 to work, the driver 4 drives all valve plates 2 to move relative to the valve body 1 through the transmission mechanism 5 to change the opening of each valve plate 2 relative to one of the exhaust ports 111. In the present invention, the controller 6 controls the driver 4 to work or stop working by receiving the real-time air pressure value from the real-time air pressure sensor 7. This structure realizes that the exhaust valve has the function of automatically changing its exhaust effect.

[0164] Specifically, the preferred structures of the exhaust valve include the following three types:

[0165] In a first preferred structure, the exhaust valve further comprises:

[0166] A real-time air pressure sensor 7, used to detect the real-time air pressure value;

[0167] Ambient air pressure sensor 8, used to detect the ambient air pressure value;

[0168] A driver 4, wherein the driver 4 is disposed on the valve body 1;

[0169] A transmission mechanism 5, wherein at least one valve plate 2 is connected to a driver 4 via the transmission mechanism 5;

[0170] The controller 6, the real-time air pressure sensor 7 and the ambient air pressure sensor 8 are electrically connected to the controller 6 respectively. After the real-time air pressure sensor 7 converts the detected real-time air pressure value into an electrical signal and transmits it to the controller 6, and the ambient air pressure sensor 8 converts the detected ambient air pressure value into an electrical signal and transmits it to the controller 6, the controller 6 controls the driver 4 to work or stop working according to the difference between the real-time air pressure value and the ambient air pressure value;

[0171] After the controller 6 controls the driver 4 to work, the driver 4 drives all valve plates 2 to move relative to the valve body 1 through the transmission mechanism 5, so as to change the opening of each valve plate 2 relative to one of the exhaust ports 111;

[0172] In the second preferred structure, the exhaust valve further comprises:

[0173] A real-time air pressure sensor 7, used to detect the real-time air pressure value;

[0174] Ambient air pressure sensor 8, used to detect the ambient air pressure value;

[0175] A driver 4, wherein the driver 4 is disposed on the valve body 1;

[0176] A transmission mechanism 5, wherein at least one valve plate 2 is connected to a driver 4 via the transmission mechanism 5;

[0177] The controller 6 presets a standard deviation value, the real-time air pressure sensor 7 and the ambient air pressure sensor 8 are electrically connected to the controller 6 respectively, after the real-time air pressure sensor 7 converts the detected real-time air pressure value into an electrical signal and transmits it to the controller 6, and the ambient air pressure sensor 8 converts the detected ambient air pressure value into an electrical signal and transmits it to the controller 6, the controller 6 obtains a real-time difference value through the real-time air pressure value and the ambient air pressure value, and the controller 6 controls the driver 4 to work or stop working according to the difference between the real-time difference value and the standard deviation value;

[0178] After the controller 6 controls the driver 4 to work, the driver 4 drives all valve plates 2 to move relative to the valve body 1 through the transmission mechanism 5, so as to change the opening of each valve plate 2 relative to one of the exhaust ports 111;

[0179] In a third preferred structure, the exhaust valve further comprises:

[0180] A real-time air pressure sensor 7, used to detect the real-time air pressure value;

[0181] A driver 4, which is arranged on the valve body 1;

[0182] A transmission mechanism 5, wherein at least one valve plate 2 is connected to a driver 4 via the transmission mechanism 5;

[0183] The controller 6 has a preset standard value, and the real-time air pressure sensor 7 is electrically connected to the controller 6. After the real-time air pressure sensor 7 converts the detected real-time air pressure value into an electrical signal and transmits it to the controller 6, the controller 6 controls the driver 4 to work or stop working according to the difference between the real-time air pressure value and the standard value;

[0184] After the controller 6 controls the driver 4 to work, the driver 4 drives all valve plates 2 to move relative to the valve body 1 through the transmission mechanism 5 to change the opening of each valve plate 2 relative to one of the exhaust ports 111 .

[0185] In the present invention, the controller 6 can compare the real-time pressure value of the real-time pressure sensor 7 with at least one of the ambient pressure value of the ambient pressure sensor 8, the preset standard deviation value of the controller 6, and the preset standard value of the controller 6 to output the control signal of the driver 4. This structure enables the controller to control the opening of the exhaust port 111 on different floors. In the present invention, the driver 4 is a motor. In other embodiments of the present invention, the driver is a cylinder; or, the driver is an oil cylinder.

[0186] Figure 7 and Figure 8The exhaust valve includes a driver 4, at least one valve plate 2 includes two valve plates 2, one of which is provided with a driving shaft 21 detachably arranged on the valve body 1, and the driving shaft 21 is provided with a first gear 211, and the other valve plate 2 is provided with a driven shaft 22 detachably arranged on the valve body 1, and the driven shaft 22 is provided with a second gear 221 meshing with the first gear 211, wherein the driving shaft 21 is directly or indirectly connected to the driver 4, when the driver 4 is working, the driver 4 will drive the driving shaft 21 to rotate, during the rotation of the driving shaft 21, the first gear 211 drives the second gear 221 to rotate, so that the two valve plates 2 rotate synchronously relative to the valve body 1.

[0187] In the present invention, when the first gear 211 is meshed with the second gear 221, the driving shaft 21 and the driven shaft 22 will move synchronously to achieve the same opening of the two valve plates 2. When the openings of the two valve plates 2 are the same, the pressures from the medium on the two valve plates 2 are substantially the same. This structure prevents the pressure difference between different exhaust ports 111 from being too large, which results in the exhaust port 111 with a larger pressure value being unable to be opened.

[0188] See also Figure 4 and Figure 8 The transformer 3 is detachably inserted in the exhaust passage 11. When the transformer 3 is inserted in the exhaust passage 11, at least part of the transformer 3 is located outside the exhaust passage 11, and a positioning structure (not marked) is provided between the transformer 3 and the valve body 1; wherein the positioning structure is used to limit the position of the transformer 3 relative to the valve body 1, for example, the positioning structure is used to limit the radial position of the transformer 3 relative to the valve body 1, and the positioning structure is used to limit the axial position of the transformer 3 relative to the valve body 1.

[0189] In the present invention, when the transformer tube 3 is detachably inserted into the exhaust passage 11, the exhaust valve does not need to be removed from the building, and the smoke exhaust effect of the exhaust valve can be changed.

[0190] See also Figure 2 , Figure 7 and Figure 8, each valve sheet 2 is rotatably connected to the valve body 1 through a rotating shaft, the valve body 1 includes a main body (unmarked) and at least two mounting seats 103, each mounting seat 103 is detachably arranged on the main body, when the mounting seat 103 is arranged on the main body, the mounting seat 103 and the main body form a mounting hole (unmarked) for installing the rotating shaft, specifically: the valve body 1 includes a main body, a first mounting seat and a second mounting seat, the first mounting seat and the second mounting seat are respectively detachably arranged on the main body, when one of the valve sheets 2 is provided with a driving shaft 211 detachably arranged on the valve body 1, and the other valve sheet 2 is provided with a driven shaft 221 detachably arranged on the valve body 1, the first mounting seat is arranged on the main body and the two form a first mounting hole for installing the driving shaft 211 and a second mounting hole for installing the driven shaft 221, the second mounting seat is arranged on the main body and the two form a first mounting hole for installing the driving shaft 211 and a second mounting hole for installing the driven shaft 221. In other embodiments of the present invention, the first gear may not be provided on the driving shaft, and the second gear may not be provided on the driven shaft.

[0191] In this embodiment, a detachable external pipe (not marked) is provided on the valve body 1, and the valve body 1 can be connected to the exhaust pipe of the range hood through the external pipe. When the valve body 1 is provided with a detachable external pipe, the exhaust valve can be fixedly connected to exhaust pipes of different sizes through the external pipe.

[0192] Preferably, the exhaust port 111 is arranged at an angle, and when the exhaust valve is installed on a building, the exhaust port 111 opens downward, and the angle between the exhaust port 111 and the horizontal plane is less than 90°.

[0193] See also Figure 1 , Figure 4 and Figure 6 , the exhaust valve, the exhaust valve is the exhaust valve described in this embodiment, including the following first exhaust volume adjustment step:

[0194] The controller 6 presets the standard deviation value;

[0195] The real-time air pressure sensor 7 detects the real-time air pressure value and converts it into an electrical signal, and the real-time air pressure sensor 7 transmits the electrical signal of the real-time air pressure value to the controller 6. The ambient air pressure sensor 8 detects the ambient air pressure value and converts it into an electrical signal, and the electrical signal of the ambient air pressure value of the ambient air pressure sensor 8 is transmitted to the controller 6. The controller 6 calculates the real-time difference value according to the received real-time air pressure value and the ambient air pressure value.

[0196] The controller 6 compares the real-time difference with the standard difference to determine whether to control the driver 4 to work;

[0197] If the controller 6 controls the driver 4 to work, the driver 4 drives all valve plates 2 to move relative to the valve body 1 through the transmission mechanism 5, so as to change the opening of each valve plate 2 relative to one of the exhaust ports 111; if the controller 6 controls the driver 4 to stop working, the opening of each valve plate 2 relative to one of the exhaust ports 111 will not change;

[0198] Or, including the following second exhaust volume adjustment steps:

[0199] The real-time air pressure sensor 7 detects the real-time air pressure value and converts it into an electrical signal, and the real-time air pressure sensor 7 transmits the electrical signal of the real-time air pressure value to the controller 6; the ambient air pressure sensor 8 detects the ambient air pressure value and converts it into an electrical signal, and the electrical signal of the ambient air pressure value of the ambient air pressure sensor 8 is transmitted to the controller 6;

[0200] The controller 6 determines whether to control the driver 4 to work according to the difference between the real-time air pressure value and the ambient air pressure value;

[0201] If the controller 6 controls the driver 4 to work, the driver 4 drives all valve plates 2 to move relative to the valve body 1 through the transmission mechanism 5, so as to change the opening of each valve plate 2 relative to one of the exhaust ports 111; if the controller 6 controls the driver 4 to stop working, the opening of each valve plate 2 relative to one of the exhaust ports 111 will not change;

[0202] Or, including the following third exhaust volume adjustment steps:

[0203] Controller 6 presets standard value;

[0204] The real-time air pressure sensor 7 detects the real-time air pressure value and converts it into an electrical signal, and the real-time air pressure sensor 7 transmits the electrical signal of the real-time air pressure value to the controller 6;

[0205] The controller 6 determines whether to control the driver 4 to work according to the difference between the real-time air pressure value and the standard value;

[0206] If the controller 6 controls the driver 4 to work, the driver 4 drives all the valve plates 2 to move relative to the valve body 1 through the transmission mechanism 5 to change the opening of each valve plate 2 relative to one of the exhaust ports 111; if the controller 6 controls the driver 4 to stop working, the opening of each valve plate 2 relative to one of the exhaust ports 111 will not change.

[0207] See also Figure 7, at least one first magnetic member (not marked) is provided on the valve body 1, and at least one second magnetic member 23 is provided on the valve plate 2. When each valve plate 2 is movably provided on the valve body 1 to close one of the exhaust ports 111, the second magnetic member 23 is adsorbed on the first magnetic member. In other embodiments of the present invention, at least one first step hole is provided on the valve body, and the first step hole is provided with a first magnetic member. The first step hole includes a first step surface arranged vertically, and the first magnetic member can abut against the first step surface, and the first step surface is facing away from the valve plate; at least one second magnetic member is provided on the valve plate, and when each valve plate is movably provided on the valve body to close one of the exhaust ports, the second magnetic member is adsorbed on the first magnetic member; or, at least one first magnetic member is provided on the valve body; at least one second step hole is provided on the valve plate, and the second step hole is provided with a second magnetic member. The second step hole includes a second step surface arranged vertically, and the second magnetic member can abut against the second step surface, and the second step surface is facing away from the transformer;

[0208] In the present invention, at least one first magnetic member is disposed on the valve body 1, and at least one second magnetic member 23 is disposed on the valve plate 2. When each valve plate 2 is movably disposed on the valve body 1 to close one of the exhaust ports 111, the second magnetic member 23 is adsorbed on the first magnetic member. This structure effectively increases the reliability of the valve plate 2 closing the exhaust port 111.

[0209] In addition, when the exhaust port 111 is tilted and opens downward, the valve plate 2 can be accelerated to move toward the first magnetic element through the second magnetic element 23 .

[0210] In the present invention, a preferred structure of the exhaust valve includes a connecting rod (not marked) and an elastic member (not marked), one end of the connecting rod is rotatably connected to a valve plate 2, and the other end of the connecting rod is rotatably connected to the valve body 1, and an elastic member is arranged between the connecting rod and the valve body 1, and the elastic member is used to drive the connecting rod to drive the valve plate 2 to close the exhaust port 111. In other embodiments of the present invention, the valve plate can close the exhaust port under the action of its own gravity.

[0211] Preferably, Fig. 9 As shown, the axial dimension of the tapered section 301 gradually decreases, the axial dimension of the pressure-taking section 302 remains unchanged, and the axial dimension of the gradually expanding section 303 gradually increases. In other embodiments of the present invention, the axial dimension of the tapered section far from one end of the pressure-taking section is greater than the axial dimension of the tapered section near one end of the pressure-taking section; or, the axial dimension of the gradually expanding section far from one end of the pressure-taking section is greater than the axial dimension of the gradually expanding section near one end of the pressure-taking section.

[0212] The exhaust valve of this embodiment is used in an exhaust volume balanced distribution system, that is, the exhaust volume balanced distribution system includes a flue and at least two exhaust valves, each exhaust valve is arranged in the flue.

[0213] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Those skilled in the art should understand that the present invention includes but is not limited to the contents described in the drawings and the above specific embodiments. Any modification that does not deviate from the functional and structural principles of the present invention will be included in the scope of the claims.

Claims

1. Exhaust valve, characterized in that include: A valve body, wherein the valve body is provided with an exhaust passage, and the exhaust passage is provided with at least one exhaust port; At least one valve plate, each valve plate is movably disposed on the valve body and is used to open or close one of the exhaust ports; A transformer tube, wherein a transformer channel is provided on the transformer tube, and the transformer tube is arranged on the valve body. When the transformer tube is arranged on the valve body, the transformer channel is communicated with all exhaust ports; The medium flows to the exhaust port through the pressure-changing channel, and the pressure-changing channel includes at least two regions, and the cross-sectional area of ​​the pressure-changing channel in one region is different from the cross-sectional area of ​​the pressure-changing channel in another region.

2. The exhaust valve according to claim 1, characterized in that The cross-sectional area of ​​one area of ​​the pressure-changing channel is A, the sum of the cross-sectional areas of all exhaust ports is B, and BA≤0.35B; Alternatively, the cross-sectional area of ​​one region of the pressure-changing channel is A, the sum of the cross-sectional areas of all exhaust ports is B, A>B, and AB≤0.35B.

3. The exhaust valve according to claim 2, characterized in that Another area of ​​the pressure changing channel is located between an area of ​​the pressure changing channel and all exhaust ports; And / or, at least one guide surface is provided in another area of ​​the pressure changing channel, and each guide surface is inclined toward a direction of an exhaust port.

4. The exhaust valve according to claim 1, characterized in that The exhaust valve further comprises: A first cavity, wherein a real-time air pressure sensor is disposed in the first cavity, and the first cavity is connected to all exhaust ports; And / or, a second cavity, wherein an ambient air pressure sensor is disposed in the second cavity, and the second cavity is not connected to all exhaust ports.

5. The exhaust valve according to claim 4, characterized in that When the exhaust valve further includes a second cavity, and at least part of the transformer tube is disposed in the exhaust passage, the outer wall of the transformer tube and the wall of the exhaust passage form the second cavity; When the exhaust valve further includes a first cavity, the pressure taking section is provided with a pressure taking hole connected to the pressure changing channel, the real-time air pressure sensor is arranged at the pressure taking hole, and the first cavity includes the pressure changing channel and the pressure taking hole.

6. The exhaust valve according to claim 1, characterized in that The transformer tube is detachably arranged on the valve body, and a sealing ring is arranged between the transformer tube and the valve body; And / or, the valve body includes an extension section, the transformer tube is arranged on the extension section, the medium flows to the exhaust port through the extension section, and a mounting structure is arranged on the extension section.

7. The exhaust valve according to claim 1, characterized in that The transformer comprises a tapered section, a pressure-taking section and a gradually expanding section which are connected in sequence, the tapered section, the pressure-taking section and the gradually expanding section are connected in sequence to form the pressure-changing channel, the valve body comprises a peripheral section and an exhaust ring arranged inside the peripheral section, the exhaust channel is arranged in the peripheral section, at least part of the exhaust ports are arranged in the exhaust ring, when at least part of the transformer is arranged in the exhaust channel, the outer wall of the tapered section, the outer wall of the pressure-taking section, the outer wall of the gradually expanding section and the inner wall of the peripheral section enclose a cavity which is not connected to all the exhaust ports; And / or, when at least part of the voltage-changing tube is arranged in the exhaust passage, the medium flows through the voltage-changing passage and then enters the exhaust port.

8. The exhaust valve according to any one of claims 1 to 7, characterized in that The exhaust valve further comprises: Real-time air pressure sensor, used to detect real-time air pressure value; A driver, wherein the driver is arranged on the valve body; A transmission mechanism, wherein at least one valve plate is connected to the driver through the transmission mechanism; A controller, wherein the real-time air pressure sensor is electrically connected to the controller, and after the real-time air pressure sensor converts the detected real-time air pressure value into an electrical signal and transmits it to the controller, the controller controls the driver to work or stop working; After the controller controls the driver to work, the driver drives all valve plates to move relative to the valve body through the transmission mechanism to change the opening of each valve plate relative to one of the exhaust ports.

9. The exhaust valve according to any one of claims 1 to 7, characterized in that The exhaust valve further comprises: Real-time air pressure sensor, used to detect real-time air pressure value; Ambient air pressure sensor, used to detect ambient air pressure value; A driver, wherein the driver is arranged on the valve body; A transmission mechanism, wherein at least one valve plate is connected to the driver through the transmission mechanism; A controller, wherein the real-time air pressure sensor and the ambient air pressure sensor are electrically connected to the controller respectively, and after the real-time air pressure sensor converts the detected real-time air pressure value into an electrical signal and transmits it to the controller, and the ambient air pressure sensor converts the detected ambient air pressure value into an electrical signal and transmits it to the controller, the controller controls the driver to work or stop working according to the difference between the real-time air pressure value and the ambient air pressure value; Wherein, after the controller controls the driver to work, the driver drives all valve plates to move relative to the valve body through the transmission mechanism to change the opening of each valve plate relative to one of the exhaust ports; Or, the exhaust valve further comprises: Real-time air pressure sensor, used to detect real-time air pressure value; Ambient air pressure sensor, used to detect ambient air pressure value; A driver, wherein the driver is arranged on the valve body; A transmission mechanism, wherein at least one valve plate is connected to the driver through the transmission mechanism; A controller, wherein the controller presets a standard deviation value, the real-time air pressure sensor and the ambient air pressure sensor are electrically connected to the controller respectively, after the real-time air pressure sensor converts the detected real-time air pressure value into an electrical signal and transmits it to the controller, and after the ambient air pressure sensor converts the detected ambient air pressure value into an electrical signal and transmits it to the controller, the controller obtains a real-time difference value through the real-time air pressure value and the ambient air pressure value, and the controller controls the driver to work or stop working according to the difference between the real-time difference value and the standard deviation value; Wherein, after the controller controls the driver to work, the driver drives all valve plates to move relative to the valve body through the transmission mechanism to change the opening of each valve plate relative to one of the exhaust ports; Or, the exhaust valve further comprises: Real-time air pressure sensor, used to detect real-time air pressure value; A driver, wherein the driver is arranged on the valve body; A transmission mechanism, wherein at least one valve plate is connected to the driver through the transmission mechanism; A controller, wherein the controller presets a standard value, the real-time air pressure sensor is electrically connected to the controller, and after the real-time air pressure sensor converts the detected real-time air pressure value into an electrical signal and transmits it to the controller, the controller controls the driver to work or stop working according to the difference between the real-time air pressure value and the standard value; After the controller controls the driver to work, the driver drives all valve plates to move relative to the valve body through the transmission mechanism to change the opening of each valve plate relative to one of the exhaust ports.

10. The exhaust valve according to any one of claims 1 to 7, characterized in that The exhaust valve includes a driver, and at least one valve plate includes two valve plates, one of which is provided with a driving shaft detachably provided on the valve body, the driving shaft is provided with a first gear, and the other valve plate is provided with a driven shaft detachably provided on the valve body, the driven shaft is provided with a second gear meshing with the first gear, wherein the driving shaft is directly or indirectly connected to the driver, and when the driver is working, the driver will drive the driving shaft to rotate, and during the rotation of the driving shaft, the first gear drives the second gear to rotate, so that the two valve plates rotate synchronously relative to the valve body; And / or, the transformer tube is detachably inserted in the exhaust passage, when the transformer tube is inserted in the exhaust passage, at least a part of the transformer tube is located outside the exhaust passage, and a positioning structure is provided between the transformer tube and the valve body.

11. The exhaust valve according to claim 10, characterized in that The valve body comprises a main body, a first mounting seat and a second mounting seat, the first mounting seat and the second mounting seat are respectively detachably arranged on the main body, when one of the valve plates is provided with a driving shaft detachably arranged on the valve body, and the other valve plate is provided with a driven shaft detachably arranged on the valve body, the first mounting seat is arranged on the main body and the two of them form a first mounting hole for mounting the driving shaft and a second mounting hole for mounting the driven shaft, and the second mounting seat is arranged on the main body and the two of them form a first mounting hole for mounting the driving shaft and a second mounting hole for mounting the driven shaft; And / or, the valve body is provided with a detachable external pipe, the valve body can be connected to the smoke exhaust pipe of the range hood through the external pipe, and the valve plate is provided with a sealing ring.

12. The exhaust valve according to any one of claims 1 to 7, characterized in that Each valve plate is rotatably connected to the valve body via a rotating shaft. The valve body comprises a main body and at least two mounting seats. Each mounting seat is detachably arranged on the main body. When the mounting seat is arranged on the main body, the mounting seat and the main body form a mounting hole for mounting the rotating shaft. And / or, the exhaust port is arranged obliquely, and when the exhaust valve is installed on the building, the exhaust port opens downward, and the angle between the exhaust port and the horizontal plane is less than 90°.

13. The exhaust valve according to any one of claims 1 to 7, characterized in that The exhaust passage is provided with an opening on one side of the valve body, all exhaust ports are provided on the other side of the valve body located on the exhaust passage, and the transformer is inserted into the exhaust passage through the opening; And / or, the exhaust valve also includes a driver, a transmission mechanism and a limiting mechanism, the transmission mechanism includes a driving gear, a driven gear and at least one intermediate gear, the driving gear is arranged on the driver, the driving gear is meshed with an intermediate gear, one of the intermediate gears is meshed with the driven gear, the driven gear is arranged on one of the valve plates, after the driver drives an intermediate gear to rotate through the driving gear, one of the intermediate gears drives the driven gear to rotate, so that the driven gear drives the valve plate to move relative to the valve body; wherein, the limiting mechanism is arranged on the transmission mechanism and the valve body to limit the rotation angle of the driven gear.

14. The exhaust valve according to claim 13, characterized in that When the exhaust valve further includes a driver, a transmission mechanism and a limiting mechanism, and the transmission mechanism includes a driving gear, a driven gear and at least one intermediate gear, the limiting mechanism includes a limiting shaft and a limiting groove, the limiting shaft is arranged on the driven gear, the valve body further includes a plate body, the limiting groove is arranged on the plate body, the limiting shaft is inserted into the limiting groove, and the driven gear drives the limiting shaft to move along the limiting groove; Or, when the exhaust valve further includes a driver, a transmission mechanism and a limit mechanism, and the transmission mechanism includes a driving gear, a driven gear and at least one intermediate gear, the limit mechanism includes a limit shaft, a limit groove, a first limit switch and a second limit switch, the limit shaft is arranged on the driven gear, the valve body further includes a plate body, the limit groove, the first limit switch and the second limit switch are arranged on the plate body, the limit shaft is inserted into the limit groove, the driven gear drives the limit shaft to move along the limit groove, and can make the limit shaft contact the first limit switch or the second limit switch; Alternatively, when the exhaust valve further includes a driver, a transmission mechanism and a limiting mechanism, and the transmission mechanism includes a driving gear, a driven gear and at least one intermediate gear, the limiting mechanism includes an encoder, the encoder is arranged on the driver, and the encoder is electrically connected to the controller.

15. An exhaust valve, the exhaust valve being the exhaust valve according to any one of claims 1 to 14, characterized in that The exhaust volume adjustment steps include the following: The controller presets the standard deviation value; The real-time air pressure sensor detects a real-time air pressure value and converts it into an electrical signal, and the real-time air pressure sensor transmits the electrical signal of the real-time air pressure value to the controller; the ambient air pressure sensor detects an ambient air pressure value and converts it into an electrical signal, and the electrical signal of the ambient air pressure value of the ambient air pressure sensor is transmitted to the controller, and the controller calculates a real-time difference value according to the received real-time air pressure value and the ambient air pressure value; The controller compares the real-time difference with the standard difference to determine whether to control the driver to work; If the controller controls the driver to work, the driver drives all valve plates to move relative to the valve body through the transmission mechanism to change the opening of each valve plate relative to one of the exhaust ports; If the controller controls the driver to stop working, the opening of each valve plate relative to one of the exhaust ports will not change; Or, including the following exhaust volume adjustment steps: The real-time air pressure sensor detects the real-time air pressure value and converts it into an electrical signal, and the real-time air pressure sensor transmits the electrical signal of the real-time air pressure value to the controller, and the ambient air pressure sensor detects the ambient air pressure value and converts it into an electrical signal, and the electrical signal of the ambient air pressure value of the ambient air pressure sensor is transmitted to the controller; The controller determines whether to control the driver to work according to the difference between the real-time air pressure value and the ambient air pressure value; If the controller controls the driver to work, the driver drives all valve plates to move relative to the valve body through the transmission mechanism to change the opening of each valve plate relative to one of the exhaust ports; If the controller controls the driver to stop working, the opening of each valve plate relative to one of the exhaust ports will not change; Or, including the following exhaust volume adjustment steps: The controller presets standard values; The real-time air pressure sensor detects the real-time air pressure value and converts it into an electrical signal, and the real-time air pressure sensor transmits the electrical signal of the real-time air pressure value to the controller; The controller determines whether to control the driver to work according to the difference between the real-time air pressure value and the standard value; If the controller controls the driver to work, the driver drives all valve plates to move relative to the valve body through the transmission mechanism to change the opening of each valve plate relative to one of the exhaust ports; If the controller controls the driver to stop working, the opening of each valve plate relative to one of the exhaust ports will not change.

16. The exhaust valve according to claim 15, characterized in that At least one first magnetic member is disposed on the valve body, and at least one second magnetic member is disposed on the valve plate. When each valve plate is movably disposed on the valve body to close one of the exhaust ports, the second magnetic member is attracted to the first magnetic member. Or, the valve body is provided with at least one first step hole, the first step hole is provided with a first magnetic member, the first step hole includes a first step surface arranged vertically, the first magnetic member can abut against the first step surface, and the first step surface faces away from the valve plate; the valve plate is provided with at least one second magnetic member, when each valve plate is movably provided on the valve body to close one of the exhaust ports, the second magnetic member is adsorbed on the first magnetic member; Or, at least one first magnetic member is provided on the valve body; at least one second step hole is provided on the valve plate, the second step hole is provided with a second magnetic member, the second step hole includes a second step surface arranged vertically, the second magnetic member can abut against the second step surface, and the second step surface faces away from the transformer; Alternatively, the exhaust valve also includes a connecting rod and an elastic member, one end of the connecting rod is rotatably connected to a valve plate, the other end of the connecting rod is rotatably connected to the valve body, the elastic member is arranged between the connecting rod and the valve body, and the elastic member is used to drive the connecting rod to drive a valve plate to close the exhaust port.

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