Exhaust valve

Abstract

The utility model 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] This utility model relates to an exhaust valve. Background Technology

[0002] The applicant discovered that the air pressure in the flue varies at different heights. Specifically, as the floor height decreases, the air pressure in the flue generally increases. The higher the air pressure, the more difficult it is for the exhaust valve to expel the fumes into the flue. This results in the difficulty of smoke extraction in low-rise residential buildings being higher than in high-rise residential buildings. In other words, the difficulty of smoke extraction varies for residential buildings on different floors.

[0003] To address the varying levels of smoke extraction difficulty in residential buildings on different floors, the applicant proposed two solutions:

[0004] The first solution is to set up a flow equalization plate. By adjusting the distance between the flow equalization plate and the guide plate, the smoke exhaust effect of the exhaust valve can be changed. For details, please refer to the utility model patent with application number 2021216584982 and patent name: Exhaust volume equalization distribution device and exhaust volume equalization distribution system.

[0005] The second solution is to change the size of the air guide hoods on different floors. For details, please refer to the utility model patent with application number 2020216098104 and patent name: Positive Pressure Zoned Exhaust Volume Balance Distribution System.

[0006] However, all of the above solutions have drawbacks, including but not limited to: the exhaust valve cannot change its smoke extraction effect after installation, and the exhaust valve cannot automatically change its smoke extraction effect. Utility Model Content

[0007] The problem to be solved by this utility model is to provide an exhaust valve with further optimized structure.

[0008] To solve the above problems, this utility model provides the following technical solution:

[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 being movably disposed in the valve body and used to open or close one of the exhaust ports;

[0012] A transformer pipe is provided with a transformer channel. The transformer pipe is located in the valve body. When the transformer pipe is located in the valve body, the transformer channel is connected to all exhaust ports.

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

[0014] It should be noted that in this utility model, the medium includes, but is not limited to, oil fumes, odorous gases, and water vapor.

[0015] In this utility model, the exhaust valve includes a valve body and a transformer pipe. The transformer pipe is installed in the valve body in two ways: either the transformer pipe is detachably installed in the valve body, or the transformer pipe is non-detachably installed in the valve body. When the transformer pipe is detachably installed in the valve body and the exhaust valve is located in a building, the transformer pipe can be installed in the valve body and / or removed from the valve body. When the transformer pipe is non-detachably installed in the valve body and the exhaust valve is located in a building, the transformer pipe can be installed in the valve body.

[0016] In this 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 at the exhaust port is less than the pressure in the exhaust channel. According to Bernoulli's 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 differs from that in another region, different locations within the transformer channel will have cross-sectional areas of varying sizes. When different cross-sectional areas exist at different locations within the transformer channel, the medium may experience a Venturi effect at the transformer tube. This design allows the exhaust valve to potentially create a secondary negative pressure, thereby enhancing the smoke extraction effect at the exhaust port (the smoke extraction effect at the exhaust port includes the flow rate of the medium passing through the exhaust port per unit time).

[0018] Preferred structures for the exhaust valve to generate secondary negative pressure include: 1. When the transformer tube includes a converging section, a pressure tapping section and a diverging section connected in sequence, the transformer tube will generate a Venturi effect in the pressure tapping section; 2. When the exhaust channel is provided with at least two exhaust ports, the transformer tube will generate a Venturi effect.

[0019] In the prior art, exhaust valves are installed in buildings, which typically include flues, walls, bathrooms, kitchens, etc. Taking a flue as an example, when the exhaust valve is installed in a flue, the rear of the exhaust port is inside the flue, and the front of the exhaust port is outside the flue.

[0020] In this invention, based on the principle that "the transformer pipe is located in the valve body and the medium flows to the exhaust port through the transformer channel," it is easy to conclude that the transformer pipe is located in front of the exhaust port. This means that when the exhaust valve is located in the flue, at least part of the transformer pipe is located outside the flue. This implies that installers can directly install the transformer pipe in the valve body without removing the existing exhaust valves installed on the building. This design provides the following advantages for the exhaust valve:

[0021] The first advantage is that it can reduce the number of exhaust valves required for the same building; exhaust valves on different floors can use the same specifications, and the problem of different smoke exhaust difficulties on different floors can be solved by simply setting different transformer pipes (that is, to achieve relatively balanced exhaust from exhaust valves on different floors).

[0022] The second advantage is that the exhaust valve's smoke extraction effect can be changed through the transformer pipe after installation. The transformer pipe is located in front of the exhaust port, so the exhaust valve can be installed or replaced with the assistance of external tools without disassembling the exhaust pipe. In other words, the transformer pipe is particularly suitable for the renovation of exhaust valves in old residential areas.

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

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

[0025] In this invention, when B = A, the pressure at A equals 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. This design minimizes the need for pressure conversion between A and B.

[0026] In this invention, when A > B, the pressure at A > the pressure at B, so that the adsorption force at the exhaust port is greater than the adsorption force at the transformer channel A. With this design, the adsorption force of the exhaust valve at its exhaust port will reach its maximum, thereby minimizing the retention of medium in the transformer pipe.

[0027] Furthermore, another area of ​​the transformer channel is located between one area of ​​the transformer channel and all the exhaust ports;

[0028] And / or, at least one guide surface is provided in another region of the transformer channel, each guide surface being inclined toward an exhaust port.

[0029] In this invention, when another region of the transformer channel is located between one region of the transformer channel and all exhaust ports, the medium will generate a Venturi effect in one region of the transformer channel.

[0030] In this invention, at least one guide surface is provided in another area of ​​the transformer 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 oil fumes stay in the exhaust valve.

[0031] Furthermore, the exhaust valve also includes:

[0032] A first chamber, which is equipped with a real-time air pressure sensor, is connected to all exhaust ports;

[0033] And / or, a second chamber, wherein an ambient pressure sensor is provided, and the second chamber is not connected to any of the exhaust ports.

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

[0035] In this invention, when the first chamber is connected to all exhaust ports and the second chamber is not connected to any exhaust ports, the first chamber is not connected to the second chamber. This design avoids the influence of the medium inside the second chamber on the detection accuracy of the real-time pressure sensor, and avoids the influence of the medium inside the first chamber on the detection accuracy of the environmental pressure sensor.

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

[0037] When the exhaust valve further includes a first cavity, the transformer pipe is provided with a pressure tapping hole communicating with the transformer channel, the real-time air pressure sensor is located in the pressure tapping hole, and the first cavity includes the transformer channel and the pressure tapping hole.

[0038] In this invention, when the second cavity is formed 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 the pressure tapping section is provided with a pressure tapping hole, the pressure tapping hole can be used to install a real-time air pressure sensor. Since the pressure tapping hole is connected to the transformer channel, the real-time air pressure sensor in the pressure tapping hole can receive the real-time air pressure value from the transformer channel.

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

[0040] And / or, the valve body includes an extension section, the transformer pipe is disposed in the extension section, the medium flows through the extension section to the exhaust port, and the extension section is provided with an installation structure.

[0041] In this invention, when the transformer tube is detachably installed in the valve body and the exhaust valve is installed in the building, the exhaust valve does not need to be removed from the building to complete the installation and disassembly of the transformer tube; the sealing ring is used to prevent the medium inside the transformer tube from entering the exhaust port.

[0042] Furthermore, the transformer tube includes a converging section, a pressure tapping section, and a diverging section connected in sequence. The converging section, the pressure tapping section, and the diverging section are connected in sequence to form the transformer channel. The valve body includes an outer section and an exhaust ring disposed inside the outer section. The exhaust channel is disposed in the outer section, and at least a portion of the exhaust ports are disposed in the exhaust ring. When at least a portion of the transformer tube is disposed in the exhaust channel, the outer wall of the converging section, the outer wall of the pressure tapping section, the outer wall of the diverging section, and the inner wall of the outer section form a cavity that is not connected to all exhaust ports.

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

[0044] In this invention, when the transformer tube includes a converging section, a pressure tapping section, and a expanding section connected in sequence, the exhaust valve generates a Venturi effect in the pressure tapping section and forms a primary negative pressure; the exhaust valve generates a Venturi effect at the exhaust port and forms a secondary negative pressure.

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

[0046] The exhaust passage has an opening on one side of the valve body, and all exhaust ports are located on the other side of the valve body in the exhaust passage. The transformer pipe is inserted into the exhaust passage through the opening.

[0047] And / or, the exhaust valve further 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 located on the driver and meshes with an intermediate gear. One of the intermediate gears meshes with the driven gear. The driven gear is located on one of the valve plates. After the driver drives an intermediate gear to rotate via the driving gear, the intermediate gear drives the driven gear to rotate, so that the driven gear drives the valve plate to move relative to the valve body. The limiting mechanism is located on the transmission mechanism and the valve body to limit the rotation angle of the driven gear.

[0048] Furthermore, the exhaust valve also includes:

[0049] A real-time barometric pressure sensor is used to detect real-time barometric pressure values.

[0050] A driver, wherein the driver is disposed on the valve body;

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

[0052] The controller is electrically connected to the real-time air pressure sensor. 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] Wherein, after the controller controls the driver to work, the driver drives all the valve plates to move relative to the valve body through the transmission mechanism, so as to change the opening degree of each valve plate relative to one of the exhaust ports.

[0054] In this invention, the controller receives real-time air pressure values ​​from a real-time air pressure sensor and controls the actuator to operate or stop operating. This design enables the exhaust valve to automatically adjust its smoke extraction efficiency.

[0055] Furthermore, the exhaust valve also includes:

[0056] A real-time barometric pressure sensor is used to detect real-time barometric pressure values.

[0057] An ambient air pressure sensor is used to detect ambient air pressure values.

[0058] A driver, wherein the driver is disposed in the valve body;

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

[0060] The controller is electrically connected to the real-time air pressure sensor and the ambient air pressure sensor 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 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 based on 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 the valve plates to move relative to the valve body through the transmission mechanism, so as to change the opening degree of each valve plate relative to one of the exhaust ports;

[0062] Alternatively, the exhaust valve may further include:

[0063] A real-time barometric pressure sensor is used to detect real-time barometric pressure values.

[0064] An ambient air pressure sensor is used to detect ambient air pressure values.

[0065] A driver, wherein the driver is disposed in the valve body;

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

[0067] The controller has a preset standard deviation. The real-time air pressure sensor and the ambient air pressure sensor are electrically connected to the controller. 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 obtains the real-time difference between the real-time air pressure value and the ambient air pressure value. The controller controls the driver to work or stop working based on the difference between the real-time difference and the standard deviation.

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

[0069] Alternatively, the exhaust valve may further include:

[0070] A real-time barometric pressure sensor is used to detect real-time barometric pressure values.

[0071] A driver, wherein the driver is disposed in the valve body;

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

[0073] The controller has a preset standard value. The real-time air pressure sensor is electrically connected to the controller. 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 based on the difference between the real-time air pressure value and the standard value.

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

[0075] In this invention, the controller can compare the ambient air pressure value from the ambient air pressure sensor, the controller's preset standard deviation value, and the controller's preset standard value with the real-time air pressure value from the real-time air pressure sensor to output a control signal to the driver. With this design, the controller can control the opening degree of the exhaust vents on different floors.

[0076] Furthermore, the exhaust valve includes a driver, and at least one valve plate includes two valve plates. One valve plate has a drive shaft detachably mounted on the valve body, and the drive shaft has a first gear. The other valve plate has a driven shaft detachably mounted on the valve body, and the driven shaft has a second gear meshing with the first gear. The drive shaft is directly or indirectly connected to the driver. When the driver is working, the driver will drive the drive shaft to rotate. During the rotation of the drive 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 into the exhaust channel, and when the transformer tube is inserted into the exhaust channel, at least a portion of the transformer tube is located outside the exhaust channel, and a positioning structure is provided between the transformer tube and the valve body.

[0078] In this invention, when the first gear meshes with the second gear, the driving shaft and the driven shaft will move synchronously to ensure that the opening degrees of the two valve plates are the same. When the opening degrees of the two valve plates are the same, the pressure from the medium on the two valve plates is basically the same. This design improves the accuracy of the two valve plates opening the exhaust port and enhances the reliability of the synchronous movement of the two valve plates.

[0079] In this invention, when the transformer pipe is detachably inserted into the exhaust channel, the exhaust valve can be modified to change its smoke extraction effect without having to be removed from the building.

[0080] In this invention, the positioning structure provides the transformer tube with axial and / or radial positioning in the valve body.

[0081] Furthermore, the valve body includes a main body, a first mounting seat, and a second mounting seat. The first mounting seat and the second mounting seat are detachably disposed on the main body. When one valve plate is provided with a drive shaft detachably disposed on the valve body, and the other valve plate is provided with a driven shaft detachably disposed on the valve body, the first mounting seat is disposed on the main body and the two together form a first mounting hole for mounting the drive shaft and a second mounting hole for mounting the driven shaft. The second mounting seat is disposed on the main body and the two together form a first mounting hole for mounting the drive 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 exhaust pipe of the range hood through the external pipe.

[0083] In this invention, when the valve body includes a main body, a first mounting base, and a second mounting base, the valve plate is detachable. This design facilitates the replacement of at least one of the valve plate, the drive shaft, and the driven shaft.

[0084] In this utility model, when the valve body is provided with a detachable external pipe, 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. The valve body includes a main body and at least two mounting seats. Each mounting seat is detachably disposed on the main body. When the mounting seat is disposed 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 inclined, and when the exhaust valve is installed on a building, the exhaust port opening faces downward, and the angle between the exhaust port and the horizontal plane is <90°.

[0087] Furthermore, 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 disposed on the driven gear. The valve body further includes a plate. The limiting groove is disposed on the plate. The limiting shaft is inserted into the limiting groove. The driven gear drives the limiting shaft to move along the limiting groove.

[0088] 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 a limiting shaft, a limiting groove, a first limiting switch, and a second limiting switch. The limiting shaft is disposed on the driven gear. The valve body further includes a plate. The limiting groove, the first limiting switch, and the second limiting switch are disposed on the plate. The limiting shaft is inserted into the limiting groove. The driven gear drives the limiting shaft to move along the limiting groove, and the limiting shaft can contact the first limiting switch or the second limiting switch.

[0089] 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 being disposed on the driver, and the encoder being electrically connected to the controller.

[0090] An exhaust valve, wherein the exhaust valve is the exhaust valve described in any of the above-mentioned technical solutions, includes the following exhaust volume adjustment steps:

[0091] The controller has a preset standard deviation.

[0092] A real-time barometric pressure sensor detects real-time barometric pressure values ​​and converts them into electrical signals, which are then transmitted to the controller. An ambient barometric pressure sensor detects ambient barometric pressure values ​​and converts them into electrical signals, which are then transmitted to the controller. The controller calculates the real-time difference based on the received real-time barometric pressure values ​​and ambient barometric pressure values.

[0093] The controller compares the real-time difference with the standard deviation to determine whether to control the driver to operate.

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

[0095] Alternatively, it may include the following displacement adjustment steps:

[0096] A real-time barometric pressure sensor detects real-time barometric pressure values ​​and converts them into electrical signals, and the real-time barometric pressure sensor transmits the electrical signals of the real-time barometric pressure values ​​to the controller. An ambient barometric pressure sensor detects ambient barometric pressure values ​​and converts them into electrical signals, and the ambient barometric pressure values ​​of the ambient barometric pressure sensor transmit the electrical signals of the ambient barometric pressure values ​​to the controller.

[0097] The controller determines whether to control the drive to operate based on 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 the valve plates to move relative to the valve body through the transmission mechanism, so as to change the opening degree of each valve plate relative to one of the exhaust ports; if the controller controls the driver to stop working, the opening degree of each valve plate relative to one of the exhaust ports will not change.

[0099] Alternatively, it may include the following displacement adjustment steps:

[0100] The controller has preset standard values;

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

[0102] The controller determines whether to control the drive to operate based on 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 the valve plates to move relative to the valve body through the transmission mechanism, so as to change the opening degree of each valve plate relative to one of the exhaust ports; if the controller controls the driver to stop working, the opening degree of each valve plate relative to one of the exhaust ports will not change.

[0104] Furthermore, the valve body is provided with at least one first magnetic attractor, and the valve plate is provided with at least one second magnetic attractor. When each valve plate is movably disposed on the valve body and one of the exhaust ports is closed, the second magnetic attractor is attracted to the first magnetic attractor.

[0105] Alternatively, the valve body may have at least one first stepped hole, the first stepped hole may have a first magnetic attraction element, the first stepped hole may have a vertically arranged first stepped surface, the first magnetic attraction element may abut against the first stepped surface, and the first stepped surface may face away from the valve plate; the valve plate may have at least one second magnetic attraction element, and when each valve plate is movably disposed on the valve body and one of the exhaust ports is closed, the second magnetic attraction element is attracted to the first magnetic attraction element;

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

[0107] Alternatively, the exhaust valve may further include a connecting rod and an elastic element. One end of the connecting rod is rotatably connected to a valve plate, and the other end of the connecting rod is rotatably connected to the valve body. The elastic element is disposed between the connecting rod and the valve body. The elastic element is used to drive the connecting rod to move a valve plate to close the exhaust port.

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

[0109] Furthermore, when the exhaust port is tilted and the exhaust port opening is downward, the valve plate can be accelerated to move towards the direction of the first magnetic attractor through the second magnetic attractor. Attached Figure Description

[0110] Figure 1 This is a perspective view of the exhaust valve in a preferred embodiment of the present invention;

[0111] Figure 2 This is a perspective view of the exhaust valve in a preferred embodiment of the present invention (valve plate omitted);

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

[0113] Figure 4 for Figure 3 Sectional view at point AA;

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

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

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

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

[0118] Figure 9 This is a perspective view of the transformer in a preferred embodiment of the present invention;

[0119] Figure 10 This is a perspective view of the controller, real-time air pressure sensor, and ambient air pressure sensor in a preferred embodiment of the present invention.

[0120] Figure 11 This is a perspective view of the valve body in a preferred embodiment of the present invention;

[0121] Figure 12 This is a first perspective view of the driver and transmission mechanism in a preferred embodiment of the present invention;

[0122] Figure 13 This is a second perspective view of the driver and transmission mechanism in a preferred embodiment of the present invention. Detailed Implementation

[0123] The technical solutions of the present utility model will be explained and described below with reference to the accompanying drawings. However, the following embodiments are only preferred embodiments of the present utility model and not all of them. Other embodiments obtained by those skilled in the art based on the embodiments in the implementation methods without creative effort are all within the protection scope of the present utility model.

[0124] See Figure 1 , Figure 2 and Figure 9 The exhaust valve includes:

[0125] Valve body 1, the valve body 1 is provided with an exhaust passage 11, 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 used to open or close one of the exhaust ports 111; the valve plate 2 is provided with a sealing ring (unmarked), 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] Transformer pipe 3, transformer pipe 3 is provided with transformer channel 31, transformer pipe 3 is located in valve body 1, when transformer pipe 3 is located in valve body 1, transformer channel 31 is connected to all exhaust ports 111.

[0128] The medium (including but not limited to oil fumes, odorous gases, and water vapor) flows through the pressure transformation channel 31 to the exhaust port 111. The pressure transformation channel 31 includes at least two regions, and the cross-sectional area of ​​the pressure transformation channel 31 in one region is different from the cross-sectional area of ​​the pressure transformation channel in the other region.

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

[0130] See Figure 7 , Figure 8 and Figure 9 The preferred structure of the transformer tube 3 is disclosed, namely, the transformer tube 3 includes a tapered section 301, a pressure tapping section 302 and a expanding section 303 connected in sequence. The tapered section 301, the pressure tapping section 302 and the expanding section 303 are connected in sequence to form a transformer channel 31. The valve body 1 includes an outer section 101 and an exhaust ring 102 disposed inside the outer section 101. The exhaust channel 11 is disposed in the outer section 101, and at least a portion of the exhaust ports 111 are disposed in the exhaust ring 102. When at least a portion of the transformer tube 3 is disposed in the exhaust channel 11, the outer wall of the tapered section 301, the outer wall of the pressure tapping section 302, the outer wall of the 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 tube 3 includes a converging section 301, a pressure tapping section 302, and a expanding section 303 connected in sequence, the exhaust valve generates a Venturi effect in the pressure tapping 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 main purpose of the phrase "the outer wall of the converging section 301, the outer wall of the pressure-tapping section 302, the outer wall of the expanding section 303, and the inner wall of the outer perimeter section 101 form a cavity that is not connected to all exhaust ports 111" is that during the discharge process of the exhaust valve installed on the building, the outer walls of the converging section 301, the pressure-tapping section 302, the expanding section 303, and the inner wall of the outer perimeter section 101 form a cavity that is not connected to all exhaust ports 111, 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 after the 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 tube 3 may also include other structures. For example, in other embodiments of the present invention, the transformer tube includes a tapering section and a pressure tapping section connected in sequence; or, the transformer tube includes a pressure tapping section and a expanding section connected in sequence; or, the transformer tube includes a expanding section, a pressure tapping section and a tapering section connected in sequence; or, the transformer tube includes a tapering section, a pressure tapping section, a expanding section and a connecting section connected in sequence.

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

[0135] See Figure 3 and Figure 4 When at least a portion of the transformer tube 3 is located 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 this utility model, when at least a portion of the transformer tube is located in the exhaust channel, the medium flows through the transformer channel and then directly enters the exhaust port.

[0136] In this utility model, the exhaust valve includes a valve body 1 and a transformer pipe 3. A sealing ring (not marked) is provided between the transformer pipe 3 and the valve body 1. The transformer pipe is provided in the valve body in two ways: either the transformer pipe is detachably provided in the valve body, or the transformer pipe is not detachably provided in the valve body. When the transformer pipe is detachably provided in the valve body and the exhaust valve is located in a building, the transformer pipe can be installed in the valve body and / or removed from the valve body. When the transformer pipe is not detachably provided in the valve body and the exhaust valve is located in a building, the transformer pipe can be installed in the valve body.

[0137] In this invention, since the exhaust channel 11 is provided with at least one exhaust port 111, 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 less than the cross-sectional area of ​​the exhaust channel 11, the pressure at the exhaust port 111 is less than the pressure in the exhaust channel 11. According to Bernoulli's principle, a negative pressure will be formed at the exhaust port 111, meaning that the medium will experience a Venturi effect at the exhaust port 111. With this design, the medium can be quickly discharged from the exhaust port 111.

[0138] Similarly, since the cross-sectional areas of the contraction section 301, the pressure tapping section 302, and the expansion section 303 are all different, according to Bernoulli's principle, a negative pressure will be formed at the pressure tapping section 302, meaning the medium will experience a Venturi effect at the pressure tapping section 302. With this design, the medium can be quickly discharged from the pressure tapping section 302, meaning the medium can undergo secondary acceleration within the exhaust valve.

[0139] See Figure 11The exhaust passage 11 has an opening 113 on one side of the valve body 1, and all exhaust ports 111 are located on the other side of the valve body 1. The transformer pipe 3 is inserted into the exhaust passage 11 through the opening 113. When the exhaust valve is installed in a building, the transformer pipe 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 valves required for the same building; exhaust valves on different floors can use the same specifications, and the problem of different smoke exhaust difficulties on different floors can be solved by simply setting different transformer pipes 3.

[0141] 2. After installation, the exhaust valve changes its smoke extraction effect through the transformer pipe 3. The transformer pipe 3 is located in front of the exhaust port 111. Therefore, the transformer pipe 3 can be installed or replaced with the assistance of external tools without disassembling the exhaust valve. In other words, the transformer pipe 3 is particularly suitable for the renovation of exhaust valves in old residential areas.

[0142] In this invention, the direction of the cross-section is... Figure 5 The orientation of the cross-sectional views in the middle BB is consistent; however, when the exhaust port 111 is tilted, the cross-section of the exhaust port 111 is consistent with its tilt direction. See also Figure 5 , Figure 6 and Figure 9 The cross-sectional area of ​​the transformer channel 31 located at the pressure tapping section 302 is A, and the sum of the cross-sectional areas of all exhaust ports 111 is B, where A > B and AB ≤ 0.35B. When A > B, the pressure at A is greater than the pressure at B, thus achieving a suction force at the exhaust port greater than the suction force at the transformer channel A. This structure maximizes the suction force of the exhaust valve at its exhaust port, minimizing media retention in the transformer tube. In other embodiments of this invention, the cross-sectional area of ​​one region of the transformer channel is A, and the sum of the cross-sectional areas of all exhaust ports is B, where BA ≤ 0.35B. When B = A, the pressure at A equals 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.

[0143] In this invention, another region of the transformer channel 31 is located between one region of the transformer channel 31 and all the exhaust ports 111. Specifically: see [link to details]. Figure 4 , Figure 9 and Figure 11Another region of the transformer channel 31 is a diverging section 303, and another region of the transformer channel 31 is a pressure tapping section 302. The diverging section 303 is located between the pressure tapping section 302 and all the exhaust ports 111. When the diverging section 303 is located between the pressure tapping section 302 and all the exhaust ports 111, the medium generates a Venturi effect at the pressure tapping section 302. In other embodiments of this utility model, the other region and one region of the transformer channel may change depending on the structure of the transformer tube.

[0144] See Figure 1 , Figure 7 and Figure 8 In another region of the transformer channel 31, at least one guide surface 112 is provided. 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 guide surfaces 112. The guide surfaces 112 are located in the exhaust ring 102. When at least a portion of the transformer pipe 3 is located in the exhaust channel 11, at least a portion of the expanding section 303 is inserted into the expanding section 303, so that at least one guide surface 112 is located in another region of the transformer channel 31. In this structure, the guide surfaces 112 are used to guide the medium to flow toward the exhaust port 111, thereby reducing the time that the medium remains in the exhaust valve, especially reducing the time that oil fumes remain in the exhaust valve.

[0145] See Figure 4 , Figure 6 and Figure 10 The exhaust valve also includes a first chamber 20 and a second chamber 10. The first chamber 20 contains a real-time pressure sensor 7 and is connected to all exhaust ports 111. The second chamber 10 contains an ambient pressure sensor 8 and is not connected to any of the exhaust ports 111. The real-time pressure sensor 7 detects the real-time pressure of the medium flowing through the first chamber 20, and the ambient pressure sensor 8 detects the ambient pressure in the second chamber 10. The real-time pressure sensor 7 and the ambient pressure sensor 8 are used in conjunction with the controller 6.

[0146] In other embodiments of this utility model, the exhaust valve further 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 further 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 Figure 2 , Figure 4 and Figure 6When the first chamber 20 is connected to all exhaust ports 111 and the second chamber 10 is not connected to all exhaust ports 111, the first chamber 20 is not connected to the second chamber 10. This structure avoids the detection accuracy of the real-time pressure sensor 7 from being affected by the medium inside the second chamber 10, and avoids the detection accuracy of the ambient pressure sensor 8 from being affected by the medium inside the first chamber 20.

[0148] See Figure 6 and Figure 8 When the exhaust valve also includes a second cavity 10, and at least part of the transformer pipe 3 is provided in the exhaust channel 11, the outer wall of the transformer pipe 3 and the wall of the exhaust channel 11 form the second cavity 10.

[0149] See Figure 4 and Figure 9 When the exhaust valve also includes the first cavity 20, the pressure tapping section 302 is provided with a pressure tapping hole 32 that communicates with the pressure transformation channel 31, and the real-time air pressure sensor 7 is located in the pressure tapping hole 32. The first cavity 20 includes the pressure transformation channel 31 and the pressure tapping hole 32.

[0150] In this invention, when the second cavity 10 is formed by the outer wall of the transformer pipe 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 tapping section 302 is provided with a pressure tapping hole 32, the pressure tapping hole 32 can be used to install a real-time pressure sensor 7. Since the pressure tapping hole 32 is connected to the transformer channel 31, the real-time pressure sensor 7 in the pressure tapping hole 32 can receive the real-time pressure value from the transformer channel 31. The real-time pressure sensor 7 located in the pressure tapping hole 32 can avoid large numerical fluctuations caused by the medium moving in the transformer channel 31 to the real-time pressure sensor 7.

[0151] See Figure 1 and Figure 8 The transformer tube 3 is detachably mounted on the valve body 1. Specifically, the transformer tube 3 and the valve body 1 are interference-fitted. When the transformer tube 3 is detachably mounted on the valve body 1 and the exhaust valve is located on a building, the installation and removal of the transformer tube can be completed without removing the exhaust valve from the building. In other embodiments of this utility model, the transformer tube is threaded to the valve body; or, the transformer tube is snap-fitted to the valve body.

[0152] from Figure 3 and Figure 4 As can be seen, the valve body 1 includes an extension section (unmarked), the transformer pipe 3 is located in the extension section, and the medium flows through the extension section to the exhaust port 111. The extension section is provided with an installation structure 12, specifically: the installation structure 12 includes a vertical groove and a horizontal groove, with the horizontal groove located at the end of the vertical groove. The installation structure 12 is used to install the exhaust pipe or external connection pipe from the range hood.

[0153] Figure 7 , Figure 8 and Figure 13 The exhaust valve also includes a driver 4, a transmission mechanism 5, and a limiting mechanism (not labeled). The transmission mechanism 5 includes a driving gear 51, a driven gear 52, and at least one intermediate gear 53. The driving gear 51 is located on the driver 4 and meshes with one intermediate gear 53. One intermediate gear 53 meshes with the driven gear 52. The driven gear 52 is located on one of the valve plates 2. After the driver 4 drives one intermediate gear 53 to rotate via the driving gear 51, one intermediate gear 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 this utility model, there may be one or two intermediate gears; or, the transmission mechanism includes a driving gear and a driven gear, with the driving gear located on the driver and the driven gear located on the valve plate; or, the transmission mechanism includes a driving wheel and the valve plate located on the driving wheel.

[0154] In addition, in other embodiments of this utility model, the driver can be a motor, and the transmission mechanism includes a gear and a rack, with the rack disposed on the valve plate and the gear disposed on the driver; or, the driver includes two motors, and the transmission mechanism includes a chain, with one end of the chain disposed on one motor and the other end of the chain disposed on the other motor, with the valve plate disposed on the chain.

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

[0156] See Figure 12The limiting mechanism includes a limiting shaft 91, a limiting groove 92, a first limiting switch 93, and a second limiting switch 94. The limiting shaft 91 is mounted on the driven gear 52. The valve body 1 also includes a plate 15. The limiting groove 92, the first limiting switch 93, and the second limiting switch 94 are mounted on the plate 15. The limiting shaft 91 is inserted into the limiting groove 92. The driven gear 52 drives the limiting shaft 91 to move along the limiting groove 92 to control the opening degree of each valve plate 2 relative to one of the exhaust ports 111 (the opening degree of the exhaust port 111 is the rotation angle of the valve plate 2 relative to the valve body 1). The first limiting... Switch 93 and the second limit switch 94 are located on both sides of the limiting groove 92 on the plate 15. The first limit switch 93 and the second limit switch 94 are electrically connected to the controller 6. The driven gear 52 drives the limiting shaft 91 to move along the limiting groove 92, so that the limiting shaft 91 can contact the first limit switch 93 or the second limit switch 94. When the limiting 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 limiting mechanism is located on the transmission mechanism 5 and the valve body 1 to limit the rotation angle of the driven gear 52. In other embodiments of this utility model, the limiting mechanism includes a limiting shaft and a limiting groove, the limiting shaft being disposed on the valve body, and the limiting groove being disposed on the intermediate gear or the driven gear; or, the limiting mechanism includes a limiting shaft, a first limiting switch, and a second limiting switch, the limiting shaft being disposed on the driven gear, the first limiting switch and the second limiting switch being disposed on the valve body, and the first limiting switch and the second limiting switch being electrically connected to the controller respectively; or, the limiting mechanism includes an encoder, the encoder being disposed on the driver, and the encoder being electrically connected to the controller; or, the limiting mechanism includes a limiting shaft and a limiting groove, the limiting shaft being disposed on the driven gear, the valve body further includes a plate, the limiting groove being disposed on the plate, the limiting shaft being inserted into the limiting groove, and the driven gear driving the limiting shaft to move along the limiting groove.

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

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

[0159] Real-time barometric pressure sensor 7 is used to detect real-time barometric pressure values;

[0160] Driver 4, driver 4 is located in valve body 1;

[0161] Transmission mechanism 5, at least one valve plate 2 is connected to the driver 4 through transmission mechanism 5;

[0162] The controller 6 is provided with an external interface 61 for connecting a data cable. 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] In this design, after the controller 6 controls the actuator 4 to operate, the actuator 4 drives all the valve plates 2 to move relative to the valve body 1 via the transmission mechanism 5, thereby changing the opening degree of each valve plate 2 relative to one of the exhaust ports 111. In this invention, the controller 6 controls the actuator 4 to operate or stop operating by receiving real-time air pressure values ​​from the real-time air pressure sensor 7. This structure enables the exhaust valve to automatically adjust its smoke extraction efficiency.

[0164] Specifically, the preferred structures for exhaust valves include the following three:

[0165] In the first preferred configuration, the exhaust valve further includes:

[0166] Real-time barometric pressure sensor 7 is used to detect real-time barometric pressure values;

[0167] Ambient air pressure sensor 8 is used to detect ambient air pressure values;

[0168] Driver 4, driver 4 is located in valve body 1;

[0169] Transmission mechanism 5, at least one valve plate 2 is connected to the driver 4 through 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. 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 based on the difference between the real-time air pressure value and the ambient air pressure value.

[0171] In this process, after 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, so as to change the opening degree of each valve plate 2 relative to one of the exhaust ports 111.

[0172] In the second preferred configuration, the exhaust valve further includes:

[0173] Real-time barometric pressure sensor 7 is used to detect real-time barometric pressure values;

[0174] Ambient air pressure sensor 8 is used to detect ambient air pressure values;

[0175] Driver 4, driver 4 is located in valve body 1;

[0176] Transmission mechanism 5, at least one valve plate 2 is connected to the driver 4 through transmission mechanism 5;

[0177] The controller 6 has a preset standard deviation. The real-time air pressure sensor 7 and the ambient air pressure sensor 8 are 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, 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 the real-time difference between the real-time air pressure value and the ambient air pressure value. The controller 6 controls the driver 4 to work or stop working based on the difference between the real-time difference and the standard deviation.

[0178] In this process, after 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, so as to change the opening degree of each valve plate 2 relative to one of the exhaust ports 111.

[0179] In the third preferred configuration, the exhaust valve also includes:

[0180] Real-time barometric pressure sensor 7 is used to detect real-time barometric pressure values;

[0181] Driver 4, driver 4 is located in valve body 1;

[0182] Transmission mechanism 5, at least one valve plate 2 is connected to the driver 4 through transmission mechanism 5;

[0183] Controller 6 has a preset standard value. 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 based on the difference between the real-time air pressure value and the standard value.

[0184] In this process, after 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, so as to change the opening degree of each valve plate 2 relative to one of the exhaust ports 111.

[0185] In this invention, the controller 6 can compare the ambient air pressure value from the ambient air pressure sensor 8, a preset standard deviation value, and a preset standard value of the controller 6 with the real-time air pressure value from the real-time air pressure sensor 7 to output a control signal to the driver 4. This structure enables the controller to control the opening degree of the exhaust vents 111 on different floors. In this invention, the driver 4 is a motor. In other embodiments of this invention, the driver is a cylinder; or, the driver is a hydraulic cylinder.

[0186] Figure 7 and Figure 8The exhaust valve includes a driver 4, and at least one valve plate 2 including two valve plates 2. One valve plate 2 is provided with a drive shaft 21 detachably mounted on the valve body 1, and a first gear 211 is provided on the drive shaft 21. The other valve plate 2 is provided with a driven shaft 22 detachably mounted on the valve body 1, and a second gear 221 meshing with the first gear 211 is provided on the driven shaft 22. The drive shaft 21 is directly or indirectly connected to the driver 4. When the driver 4 is working, the driver 4 will drive the drive shaft 21 to rotate. During the rotation of the drive 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 this invention, when the first gear 211 meshes with the second gear 221, the driving shaft 21 and the driven shaft 22 will move synchronously to ensure that the opening degrees of the two valve plates 2 are the same. When the opening degrees of the two valve plates 2 are the same, the pressure from the medium on the two valve plates 2 is basically the same. This structure avoids excessive pressure differences between different exhaust ports 111, which could prevent the exhaust port 111 with higher pressure from being opened.

[0188] See Figure 4 and Figure 8 The transformer tube 3 is detachably inserted into the exhaust channel 11. When the transformer tube 3 is inserted into the exhaust channel 11, at least a portion of the transformer tube 3 is located outside the exhaust channel 11, and a positioning structure (not marked) is provided between the transformer tube 3 and the valve body 1. The positioning structure is used to limit the position of the transformer tube 3 relative to the valve body 1. For example, the positioning structure is used to limit the radial position of the transformer tube 3 relative to the valve body 1, and the positioning structure is used to limit the axial position of the transformer tube 3 relative to the valve body 1.

[0189] In this invention, when the transformer pipe 3 is detachably inserted into the exhaust channel 11, the exhaust valve can change its smoke exhaust effect without having to be removed from the building.

[0190] See Figure 2 , Figure 7 and Figure 8Each valve plate 2 is rotatably connected to the valve body 1 via 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 mounted on the main body. When the mounting seat 103 is mounted on the main body, the mounting seat 103 and the main body form a mounting hole (unmarked) for mounting 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 detachably mounted on the main body. When one valve plate 2 is provided with a drive shaft 211 detachably mounted on the valve body 1, and the other valve plate 2 is provided with a driven shaft 221 detachably mounted on the valve body 1, the first mounting seat is mounted on the main body and the two together form a first mounting hole for mounting the drive shaft 211 and a second mounting hole for mounting the driven shaft 221. The second mounting seat is mounted on the main body and the two together form a first mounting hole for mounting the drive shaft 211 and a second mounting hole for mounting the driven shaft 221. In other embodiments of this utility model, the first gear may not be provided on the drive shaft, and the second gear may not be provided on the driven shaft.

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

[0192] Preferably, the exhaust port 111 is inclined, and when the exhaust valve is installed in the building, the exhaust port 111 opens downward, and the angle between the exhaust port 111 and the horizontal plane is <90°.

[0193] See Figure 1 , Figure 4 and Figure 6 The exhaust valve, which is the exhaust valve described in this embodiment, includes the following first step of adjusting the exhaust volume:

[0194] Controller 6 presets standard deviation;

[0195] Real-time air pressure sensor 7 detects real-time air pressure value and converts it into an electrical signal, and transmits the electrical signal of real-time air pressure value to controller 6. Ambient air pressure sensor 8 detects ambient air pressure value and converts it into an electrical signal, and transmits the electrical signal of ambient air pressure value of ambient air pressure sensor 8 to controller 6. Controller 6 calculates the real-time difference based on the received real-time air pressure value and ambient air pressure value.

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

[0197] 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, so as to change the opening degree 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 degree of each valve plate 2 relative to one of the exhaust ports 111 will not change.

[0198] Alternatively, it may include the following second displacement adjustment step:

[0199] Real-time barometric pressure sensor 7 detects real-time barometric pressure value and converts it into an electrical signal, and transmits the electrical signal of the real-time barometric pressure value to controller 6. Ambient barometric pressure sensor 8 detects ambient barometric pressure value and converts it into an electrical signal, and transmits the electrical signal of the ambient barometric pressure value of ambient barometric pressure sensor 8 to controller 6.

[0200] The controller 6 determines whether to control the driver 4 to work based on 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 the valve plates 2 to move relative to the valve body 1 through the transmission mechanism 5, so as to change the opening degree 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 degree of each valve plate 2 relative to one of the exhaust ports 111 will not change.

[0202] Alternatively, it may include the following third displacement adjustment step:

[0203] Controller 6 presets standard values;

[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 based on 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, so as to change the opening degree 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 degree of each valve plate 2 relative to one of the exhaust ports 111 will not change.

[0207] See Figure 7The valve body 1 is provided with at least one first magnetic attractor (unmarked), and the valve plate 2 is provided with at least one second magnetic attractor 23. When each valve plate 2 is movably disposed on the valve body 1 and one of the exhaust ports 111 is closed, the second magnetic attractor 23 is attracted to the first magnetic attractor. In other embodiments of the present invention, the valve body is provided with at least one first stepped hole, the first stepped hole is provided with a first magnetic attractor, the first stepped hole includes a vertically arranged first stepped surface, the first magnetic attractor can abut against the first stepped surface, and the first stepped surface faces away from the valve plate; the valve plate is provided with at least one second magnetic attractor, when each valve plate is movably disposed on the valve body and one of the exhaust ports is closed, the second magnetic attractor is attracted to the first magnetic attractor; or, the valve body is provided with at least one first magnetic attractor; the valve plate is provided with at least one second stepped hole, the second stepped hole is provided with a second magnetic attractor, the second stepped hole includes a vertically arranged second stepped surface, the second magnetic attractor can abut against the second stepped surface, and the second stepped surface faces away from the transformer tube;

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

[0209] Furthermore, when the exhaust port 111 is tilted and the opening of the exhaust port 111 is facing downwards, the valve plate 2 can be accelerated to move towards the direction of the first magnetic attractor via the second magnetic attractor 23.

[0210] In a preferred embodiment of this utility model, the exhaust valve further includes a connecting rod (unmarked) and an elastic element (unmarked). 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 a valve body 1. An elastic element is provided between the connecting rod and the valve body 1, and the elastic element is used to drive the connecting rod to move the valve plate 2 to close the exhaust port 111. In other embodiments of this utility model, the valve plate can close the exhaust port under its own weight.

[0211] Preferred, such as Figure 9 As shown, the axial dimension of the tapering section 301 gradually decreases, the axial dimension of the pressure-taking section 302 remains unchanged, and the axial dimension of the expanding section 303 gradually increases. In other embodiments of this utility model, the axial dimension of the tapering section away from the pressure-taking section is greater than the axial dimension of the tapering section closer to the pressure-taking section; or, the axial dimension of the expanding section away from the pressure-taking section is greater than the axial dimension of the expanding section closer to the pressure-taking section.

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

[0213] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Those skilled in the art should understand that this utility model includes, but is not limited to, the content described in the accompanying drawings and the specific embodiments above. Any modifications that do not depart from the functional and structural principles of this utility model will be included within the scope of the claims.

Claims

1. An 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 being movably disposed in the valve body and used to open or close one of the exhaust ports; A transformer pipe is provided with a transformer channel. The transformer pipe is located in the valve body. When the transformer pipe is located in the valve body, the transformer channel is connected to all exhaust ports. The medium flows through the pressure transformation channel to the exhaust port. The pressure transformation channel includes at least two regions, and the cross-sectional area of ​​the pressure transformation channel in one region is different from the cross-sectional area of ​​the pressure transformation channel in the other region.

2. The exhaust valve as described in claim 1, characterized in that, The cross-sectional area of ​​one region of the transformer channel is A, and the sum of the cross-sectional areas of all exhaust ports is B, where BA ≤ 0.35B; Alternatively, the cross-sectional area of ​​one region of the transformer 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 as described in claim 2, characterized in that, Another area of ​​the transformer channel is located between one area of ​​the transformer channel and all the exhaust ports; And / or, at least one guide surface is provided in another region of the transformer channel, each guide surface being inclined toward an exhaust port.

4. The exhaust valve as described in claim 1, characterized in that, The exhaust valve also includes: A first chamber, which is equipped with a real-time air pressure sensor, is connected to all exhaust ports; And / or, a second chamber, wherein an ambient pressure sensor is provided, and the second chamber is not connected to any of the exhaust ports.

5. The exhaust valve as described in claim 4, characterized in that, When the exhaust valve further includes a second cavity, and at least part of the transformer pipe is disposed in the exhaust passage, the outer wall of the transformer pipe and the wall of the exhaust passage form the second cavity; When the exhaust valve further includes a first cavity, the transformer pipe is provided with a pressure tapping hole communicating with the transformer channel, the real-time air pressure sensor is located in the pressure tapping hole, and the first cavity includes the transformer channel and the pressure tapping hole.

6. The exhaust valve as described in claim 1, characterized in that, The transformer tube is detachably disposed on the valve body, and a sealing ring is provided between the transformer tube and the valve body; And / or, the valve body includes an extension section, the transformer pipe is disposed in the extension section, the medium flows through the extension section to the exhaust port, and the extension section is provided with an installation structure.

7. The exhaust valve as described in claim 1, characterized in that, The transformer tube includes a converging section, a pressure tapping section, and a diverging section connected in sequence. The converging section, the pressure tapping section, and the diverging section are connected in sequence to form the transformer channel. The valve body includes an outer section and an exhaust ring disposed inside the outer section. The exhaust channel is disposed in the outer section, and at least part of the exhaust ports are disposed in the exhaust ring. When at least part of the transformer tube is disposed in the exhaust channel, the outer wall of the converging section, the outer wall of the pressure tapping section, the outer wall of the diverging section, and the inner wall of the outer section form a cavity that is not connected to all exhaust ports. And / or, when at least a portion of the transformer is located in the exhaust passage, the medium flows through the transformer passage and then enters the exhaust port.

8. The exhaust valve as described in any one of claims 1 to 7, characterized in that, The exhaust valve also includes: A real-time barometric pressure sensor is used to detect real-time barometric pressure values. A driver, wherein the driver is disposed in the valve body; A transmission mechanism, wherein at least one valve plate is connected to the driver via the transmission mechanism; The controller is electrically connected to the real-time air pressure sensor. 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 the valve plates to move relative to the valve body through the transmission mechanism, so as to change the opening degree of each valve plate relative to one of the exhaust ports.

9. The exhaust valve as described in any one of claims 1 to 7, characterized in that, The exhaust valve also includes: A real-time barometric pressure sensor is used to detect real-time barometric pressure values. An ambient air pressure sensor is used to detect ambient air pressure values. A driver, wherein the driver is disposed in the valve body; A transmission mechanism, wherein at least one valve plate is connected to the driver via the transmission mechanism; The controller is electrically connected to the real-time air pressure sensor and the ambient air pressure sensor 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 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 based on 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 the valve plates to move relative to the valve body through the transmission mechanism, so as to change the opening degree of each valve plate relative to one of the exhaust ports; Alternatively, the exhaust valve may further include: A real-time barometric pressure sensor is used to detect real-time barometric pressure values. An ambient air pressure sensor is used to detect ambient air pressure values. A driver, wherein the driver is disposed in the valve body; A transmission mechanism, wherein at least one valve plate is connected to the driver via the transmission mechanism; The controller has a preset standard deviation. The real-time air pressure sensor and the ambient air pressure sensor are electrically connected to the controller. 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 obtains the real-time difference between the real-time air pressure value and the ambient air pressure value. The controller controls the driver to work or stop working based on the difference between the real-time difference and the standard deviation. Wherein, after the controller controls the driver to work, the driver drives all the valve plates to move relative to the valve body through the transmission mechanism, so as to change the opening degree of each valve plate relative to one of the exhaust ports; Alternatively, the exhaust valve may further include: A real-time barometric pressure sensor is used to detect real-time barometric pressure values. A driver, wherein the driver is disposed in the valve body; A transmission mechanism, wherein at least one valve plate is connected to the driver via the transmission mechanism; The controller has a preset standard value. The real-time air pressure sensor is electrically connected to the controller. 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 based on 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 the valve plates to move relative to the valve body through the transmission mechanism, so as to change the opening degree of each valve plate relative to one of the exhaust ports.

10. The exhaust valve as described in 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 valve plate has a drive shaft detachably mounted on the valve body, and the drive shaft has a first gear. The other valve plate has a driven shaft detachably mounted on the valve body, and the driven shaft has a second gear meshing with the first gear. The drive shaft is directly or indirectly connected to the driver. When the driver is working, the driver will drive the drive shaft to rotate. During the rotation of the drive 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 into the exhaust channel, and when the transformer tube is inserted into the exhaust channel, at least a portion of the transformer tube is located outside the exhaust channel, and a positioning structure is provided between the transformer tube and the valve body.

11. The exhaust valve as claimed in claim 10, characterized in that, The valve body includes a main body, a first mounting seat, and a second mounting seat. The first mounting seat and the second mounting seat are detachably disposed on the main body. When one valve plate has a drive shaft detachably disposed on the valve body, and the other valve plate has a driven shaft detachably disposed on the valve body, the first mounting seat is disposed on the main body and the two together form a first mounting hole for mounting the drive shaft and a second mounting hole for mounting the driven shaft. The second mounting seat is disposed on the main body and the two together form a first mounting hole for mounting the drive 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 exhaust pipe of the range hood through the external pipe, and the valve plate is provided with a sealing ring.

12. The exhaust valve as described in 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 includes a main body and at least two mounting seats. Each mounting seat is detachably disposed on the main body. When the mounting seat is disposed 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 inclined, and when the exhaust valve is installed on a building, the exhaust port opening faces downward, and the angle between the exhaust port and the horizontal plane is <90°.

13. The exhaust valve as described in any one of claims 1 to 7, characterized in that, The exhaust passage has an opening on one side of the valve body, and all exhaust ports are located on the other side of the valve body in the exhaust passage. The transformer pipe is inserted into the exhaust passage through the opening. And / or, the exhaust valve further 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 located on the driver and meshes with an intermediate gear. One of the intermediate gears meshes with the driven gear. The driven gear is located on one of the valve plates. After the driver drives an intermediate gear to rotate via the driving gear, the intermediate gear drives the driven gear to rotate, so that the driven gear drives the valve plate to move relative to the valve body. The limiting mechanism is located on the transmission mechanism and the valve body to limit the rotation angle of the driven gear.

14. The exhaust valve as claimed in 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 disposed on the driven gear. The valve body further includes a plate. The limiting groove is disposed on the plate. The limiting shaft is inserted into the limiting groove. The driven gear drives the limiting shaft to move along the limiting groove. 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 a limiting shaft, a limiting groove, a first limiting switch, and a second limiting switch. The limiting shaft is disposed on the driven gear. The valve body further includes a plate. The limiting groove, the first limiting switch, and the second limiting switch are disposed on the plate. The limiting shaft is inserted into the limiting groove. The driven gear drives the limiting shaft to move along the limiting groove, and the limiting shaft can contact the first limiting switch or the second limiting 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 disposed on the driver and electrically connected to the controller.

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