Electric air valve with function of accurately controlling air inlet amount

Abstract

The invention provides an electric air valve with the function of accurately controlling the air inlet amount, and relates to the technical field of central fresh air, the electric air valve comprises a panel, a control circuit board, a driving device, a conical flow guide fan cover, a conical air cap, a shell and a preset fan, a driving rod of the driving device penetrates through the conical flow guide fan cover and then is mechanically connected with the conical air cap; the conical air cap is driven to slide in the direction of the center shaft according to a control instruction sent by the control circuit board so as to change the size of an air outlet of the target air duct; the target air duct is an air duct formed between the top surface of the conical hood and the unit pipeline; the control circuit board is used for generating a control instruction according to the target air inlet amount when it is determined that the air inlet amount of the target air duct needs to be adjusted to the target air inlet amount. And the preset fan is arranged in the unit pipeline. The air inlet amount can be accurately controlled.

Description

Technical Field

[0001] The present invention relates to the technical field of central fresh air, and particularly to an electric air valve with the function of precisely controlling the air intake volume. Background Art

[0002] The electric air valve is the core component for regulating the air flow rate of the fresh air system in the pipeline, and its performance directly affects the indoor air quality and the energy efficiency of the system. However, most of the current electric air valve products can only adjust the air intake volume in three levels: high, medium, and low, and cannot precisely control the air intake volume, thus unable to meet the needs of users to separately calculate the usage costs of related equipment based on the air intake volume data.

[0003] Based on this, how to provide an electric air valve with the function of precisely controlling the air intake volume has become an urgent technical problem to be solved. Summary of the Invention

[0004] In view of this, in order to solve the above technical problems, the present invention provides an electric air valve with the function of precisely controlling the air intake volume.

[0005] The present invention adopts the following technical solutions:

[0006] An electric air valve with the function of precisely controlling the air intake volume, comprising: a panel, a control circuit board, a driving device, a conical guide air hood, a conical air cap, a housing, and a preset fan;

[0007] The panel is mechanically connected to the bottom surface of the bottom edge of the conical guide air hood, and the top surface of the bottom edge of the conical guide air hood is mechanically connected to the housing;

[0008] The control circuit board and the driving device are arranged in the space enclosed by the panel and the conical guide air hood. The driving device is installed on the control circuit board. The conical air cap is arranged in the space enclosed by the conical guide air hood and the housing. The central axes of the unit pipelines in the conical guide air hood, the conical air cap, and the housing coincide, and the tops of the conical guide air hood and the conical air cap face the unit pipeline;

[0009] The driving rod of the driving device passes through the conical guide air hood and is mechanically connected to the conical air cap, and drives the conical air cap to slide along the direction of the central axis according to the control instruction sent by the control circuit board, so as to change the size of the air outlet of the target air duct. The target air duct is the air duct formed between the top surface of the conical air cap and the unit pipeline;

[0010] The control circuit board is used to generate the control instruction according to the target air intake volume and send it to the driving device when it is determined that the air intake volume of the target air duct needs to be adjusted to the target air intake volume;

[0011] The preset fan is arranged inside the unit duct.

[0012] Optionally, the control circuit board is specifically configured to:

[0013] When it is determined that the air intake volume of the target air duct needs to be adjusted to the target air intake volume, calculate the working parameters of the driving device according to the target air intake volume and the following formula to obtain a working parameter calculation result:

[0014]

[0015] where Q is the actual air intake volume, C is the flow coefficient of the unit duct, V is the wind speed, r2 is the radius of the inner pipe of the unit duct, θ is half of the cone angle of the conical wind cap, r = (r2 - r1)tgθ, r1 is the radius of the circle formed by the point on the conical wind cap that is closest to the inner pipe of the unit duct when the conical wind cap slides under the drive of the driving device after rotating one week around the central axis of the conical wind cap; S i is the number of pulses of the i-th pulse, is the step angle of the i-th pulse, p is the pitch of the driving rod of the driving device; n is the preset number of pulses.

[0016] Generate the control instruction according to the working parameter calculation result;

[0017] Send the control instruction to the driving device.

[0018] Optionally, the electric air valve with the function of accurately controlling the air intake volume of the present invention further includes: a sealing ring;

[0019] The sealing ring is arranged between the conical wind cap and the housing and is fixedly connected to the top surface of the bottom edge of the conical wind cap;

[0020] When the conical wind cap and the housing compress the sealing ring, the air outlet of the target air duct is closed.

[0021] Optionally, the material of the sealing ring is silicone.

[0022] Optionally, the control circuit board is further configured to:

[0023] When the air outlet of the target air duct is closed, obtain the first actual pressure difference on both sides of the conical wind cap;

[0024] Calculate the first absolute value of the difference between the first actual pressure difference and the preset pressure difference;

[0025] Judge whether the first absolute value is greater than the preset absolute value threshold;

[0026] If the first absolute value is greater than a preset absolute value threshold, for the purpose of making the second absolute value of the difference between the second actual pressure difference on both sides of the conical wind cap and the preset pressure difference not greater than a preset threshold when the air outlet of the target air duct is closed, adjust the working parameters of the driving device according to the first absolute value.

[0027] Optionally, a bus interface is integrated on the control circuit board.

[0028] Optionally, the bus interface includes a Modbus bus interface and a KNX bus interface.

[0029] Optionally, a wireless communication chip is integrated on the control circuit board.

[0030] Optionally, the wireless communication chip includes a Wi-Fi6+Mesh chip.

[0031] Optionally, 3 slide rails are arranged on the bottom surface of the bottom edge of the conical wind cap, and the 3 slide rails form an equilateral triangle bracket state, which can ensure the stable operation of the wind cap back and forth;

[0032] Through holes corresponding to the slide rails are arranged on the conical guide wind cover. After the slide rails are inserted into the corresponding through holes, the conical wind cap is prevented from rotating along with the driving rod.

[0033] The present invention adopts the above technical solutions. An electric air valve with the function of accurately controlling the air intake volume includes: a panel, a control circuit board, a driving device, a conical guide wind cover, a conical wind cap, a housing and a preset fan; the panel is mechanically connected to the bottom surface of the bottom edge of the conical guide wind cover, and the top surface of the bottom edge of the conical guide wind cover is mechanically connected to the housing; the control circuit board and the driving device are arranged in the space surrounded by the panel and the conical guide wind cover, the driving device is installed on the control circuit board, and the conical wind cap is arranged in the space surrounded by the conical guide wind cover and the housing; the central axes of the unit pipelines in the conical guide wind cover, the conical wind cap and the housing coincide, and the tops of the conical guide wind cover and the conical wind cap face the unit pipeline; the driving rod of the driving device passes through the conical guide wind cover and is mechanically connected to the conical wind cap, and drives the conical wind cap to slide along the direction of the central axis according to the control instruction sent by the control circuit board to change the size of the air outlet of the target air duct; the target air duct is the air duct formed between the top surface of the conical wind cap and the unit pipeline; the control circuit board is used for generating a control instruction according to the target air intake volume and sending it to the driving device when it is determined that the air intake volume of the target air duct needs to be adjusted to the target air intake volume; the preset fan is arranged in the unit pipeline.

[0034] Based on this, when the control circuit board determines that the air intake volume of the target air duct needs to be adjusted to the target air intake volume, it controls the working state of the driving device to slide the conical air cap along the direction of the central axis, so as to change the outlet size of the target air duct and achieve precise control of the air intake volume. In addition, the design of the conical guide air hood and the conical air cap enables the present invention to reduce wind resistance; the preset fan is arranged in the unit duct, making the present invention have the advantage of low noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0036] Figure 1 FIG. 1 is a three-dimensional structural schematic diagram of an electric air valve with the function of precisely controlling the air intake volume provided by an embodiment of the present invention;

[0037] Figure 2 corresponding to Figure 1 FIG. 2 is a cross-sectional view of the electric air valve with the function of precisely controlling the air intake volume shown in FIG. 1;

[0038] Figure 3 corresponding to Figure 1 FIG. 3 is an exploded view of the electric air valve with the function of precisely controlling the air intake volume shown in FIG. 1;

[0039] Figure 4 FIG. 4 is a cross-sectional view of a target air duct provided by an embodiment of the present invention;

[0040] Figure 5 FIG. Figure 4 5 is a partial enlarged view of the air outlet of the target air duct in FIG. 4. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0041] In order to make the objectives, technical solutions, and advantages of the present invention clearer, the following will describe the technical solutions of the present invention in detail. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other implementation manners obtained by those of ordinary skill in the art without creative efforts belong to the scope protected by the present invention.

[0042] Figure 1 FIG. 1 is a three-dimensional structural schematic diagram of an electric air valve with the function of precisely controlling the air intake volume provided by an embodiment of the present invention. Figure 2 corresponding to Figure 1 FIG. 2 is a cross-sectional view of the electric air valve with the function of precisely controlling the air intake volume shown in FIG. 1.Figure 3 corresponds to Figure 1 the exploded view of the electric air valve with the function of precisely controlling the air intake shown

[0043] Refer to Figure 1 、 Figure 2 and Figure 3 The electric air valve with the function of precisely controlling the air intake of the present invention includes: a panel 1, a control circuit board 2, a driving device 3, a conical air guide hood 4, a conical air cap 5, a housing 7, and a preset fan 8

[0044] The panel 1 is mechanically connected to the bottom surface of the bottom edge of the conical air guide hood 4. Specifically, the panel 1 can be pasted on the bottom surface of the bottom edge of the conical air guide hood 4. The top surface of the bottom edge of the conical air guide hood 4 is mechanically connected to the housing 7. The main part of the housing 7 can be a cylindrical structure, and one end of the cylindrical structure is connected to a disc-shaped structure with a larger diameter. The top surface of the bottom edge of the conical air guide hood 4 can be fixedly connected to the disc-shaped structure of the housing 7 through a threaded structure

[0045] The control circuit board 2 and the driving device 3 are arranged in the space enclosed by the panel 1 and the conical air guide hood 4. The driving device 3 can be installed on the control circuit board 2 by screws. The conical air cap 5 is arranged in the space enclosed by the conical air guide hood 4 and the housing 7; the central axes of the unit ducts 71 in the conical air guide hood 4, the conical air cap 5, and the housing 7 coincide, and the tops of the conical air guide hood 4 and the conical air cap 5 face the unit duct 71

[0046] The driving rod of the driving device 3 passes through the conical air guide hood 4 and is mechanically connected to the conical air cap 5, and drives the conical air cap 5 to slide along the direction of the central axis according to the control instruction sent by the control circuit board 2 to change the outlet size of the target air duct. When the conical air cap 5 slides in the direction close to the unit duct 71, the outlet of the target air duct gradually shrinks until it is closed, so that the air intake gradually decreases, and even the air intake decreases to 0; when the conical air cap 5 slides in the direction away from the unit duct 71, the outlet of the target air duct gradually increases, so that the air intake gradually increases. Among them, the target air duct is the air duct formed between the top surface of the conical air cap 5 and the unit duct 71. The driving rod can specifically be a threaded driving rod

[0047] The control circuit board 2 is used to determine that the air intake of the target air duct needs to be adjusted to the target air intake when receiving the target air intake sent by an external device, and then generate a control instruction according to the target air intake and send it to the driving device 3

[0048] The preset fan is arranged in the unit duct and is used to work in the air intake state to drive the indoor air circulation so that the air flows through the electric air valve

[0049] In an embodiment of the present invention, the above technical solution is adopted. An electric air valve with the function of precisely controlling the air intake volume includes: a panel, a control circuit board, a driving device, a conical guide air hood, a conical air cap, a housing, and a preset fan; the panel is mechanically connected to the bottom surface of the bottom edge of the conical guide air hood, and the top surface of the bottom edge of the conical guide air hood is mechanically connected to the housing; the control circuit board and the driving device are arranged in the space enclosed by the panel and the conical guide air hood, the driving device is installed on the control circuit board, and the conical air cap is arranged in the space enclosed by the conical guide air hood and the housing; the central axes of the unit pipelines in the conical guide air hood, the conical air cap, and the housing coincide, and the tops of the conical guide air hood and the conical air cap face the unit pipeline; the driving rod of the driving device passes through the conical guide air hood and is mechanically connected to the conical air cap, and drives the conical air cap to slide along the direction of the central axis according to the control instruction sent by the control circuit board, so as to change the outlet size of the target air duct; the target air duct is the air duct formed between the top surface of the conical air cap and the unit pipeline; the control circuit board is used to generate a control instruction according to the target air intake volume and send it to the driving device when it is determined that the air intake volume of the target air duct needs to be adjusted to the target air intake volume; the preset fan is arranged in the unit pipeline.

[0050] Based on this, since when the control circuit board determines that the air intake volume of the target air duct needs to be adjusted to the target air intake volume, it controls the working state of the driving device to drive the conical air cap to slide along the direction of the central axis, so as to change the outlet size of the target air duct and achieve precise control of the air intake volume, and thus can meet the needs of users to separately calculate the usage costs of their related equipment according to their air intake volume data. In addition, the design of the conical guide air hood and the conical air cap enables the present invention to reduce wind resistance; the preset fan is arranged in the unit pipeline, making the present invention have the advantage of low noise.

[0051] In an embodiment of the present invention, the control circuit board 2 may specifically be a PCB (Printed Circuit Board). The driving device 3 may include a stepper motor and a driving rod. The preset fan 8 may be an axial flow fan.

[0052] In an embodiment of the present invention, the control circuit board 2 may specifically be used for:

[0053] (1) When it is determined that the air intake volume of the target air duct needs to be adjusted to the target air intake volume, calculate the working parameters of the driving device according to the target air intake volume and the following formula to obtain the calculation result of the working parameters:

[0054]

[0055] where Q is the actual air intake volume, and the unit is m 3 / h; C is the flow coefficient of the unit pipeline, which depends on factors such as the shape of the unit pipeline and the wind speed distribution; V is the wind speed, in m / s; r2 is the radius of the inner pipe of the unit pipeline, which is a constant and is selected during product design; θ is half of the cone angle of the conical wind cap; r = (r2 - r1)tgθ, where r1 is the radius of the circle formed by the point on the conical wind cap that is closest to the inner pipe of the unit pipeline when the conical wind cap slides under the drive of the driving device after rotating one week around the central axis of the conical wind cap, and r1 is a variable. S i is the number of pulses of the i-th pulse, is the step angle of the i-th pulse, p is the pitch of the driving rod of the driving device; n is the preset number of pulses.

[0056] (2) Generate a control instruction according to the calculation result of the working parameters.

[0057] (3) Send the control instruction to the driving device.

[0058] Specifically, Figure 4 is a cross-sectional view of a target air duct provided by an embodiment of the present invention. Figure 5 is Figure 4 a partial enlarged view of the air outlet of the target air duct in Figure 4 and Figure 5 , the air outlet 711 of the target air duct is in the shape of a frustum of a cone. According to the formula for the lateral area of a frustum of a cone, the lateral area of the air outlet 711 of the target air duct is:

[0059]

[0060] where ΔS is the lateral area of the frustum of a cone, that is, the lateral area of the air outlet 711 of the target air duct, and L is the generatrix length of the frustum of a cone.

[0061] Let r = (r2 - r1)tgθ and substitute it into formula (2) to get:

[0062]

[0063] The axial displacement dr of the conical wind cap when the stepping motor rotates forward or backward by a step angle θ S is:

[0064]

[0065] where the step angle θ S is smaller, the higher the air intake control accuracy of this application. Therefore, this application preferably uses a stepping motor with a smaller step angle θ S For example, a stepping motor with a step angle θ S of 0.36° can be used.

[0066] Based on Equation (4), when the control circuit board sends n pulse signals, the axial displacement r of the conical wind cap is as follows:

[0067]

[0068] From Q = CVS, according to Equations (3) and (5), we get:

[0069]

[0070] Therefore, when the control circuit board 2 determines that the air intake of the target air duct needs to be adjusted to the target air intake, it calculates the working parameters of the driving device according to the target air intake, the current position of the conical wind cap, and Equation (1), generates a control instruction according to the calculation result of the working parameters, and sends the control instruction to the driving device, so that the driving device drives the conical wind cap to slide, so that the air intake of the target air duct is adjusted to the target air intake. In the embodiment of the present invention, through the design of the product geometric dimensions, the mathematical formula for air volume control is directly derived (i.e., Equation (1)). For each electrical pulse sent by the control circuit board 2 according to Equation (1), the stepping motor advances or retreats a step angle, and then the conical wind cap advances or retreats a step dr. r is the axial displacement generated by the total number of pulses n sent by the control circuit. According to Equation (1), the size of the air intake is calculated, and the working parameters of the driving device are calculated to achieve precise control of the air intake. The algorithm is simple and the calculation amount is low, so that the present invention can accurately obtain the size of the air intake and establish a definite connection through the mathematical algorithm and the control system.

[0071] In the embodiment of the present invention, with reference to Figures 1 to 3 , the electric air valve with the function of precisely controlling the air intake of the present invention may further include: a sealing ring 6.

[0072] The sealing ring 6 is arranged between the conical wind cap 5 and the housing 7 and is fixedly connected to the top surface of the bottom edge of the conical wind cap 5. Specifically, the sealing ring 6 can be pasted on the top surface of the bottom edge of the conical wind cap 5. When the conical wind cap 5 and the housing 7 compress the sealing ring 6, the air outlet of the target air duct is closed.

[0073] In the embodiment of the present invention, by adopting the above technical solution, by arranging the sealing ring 6 between the conical wind cap 5 and the housing 7, when the conical wind cap 5 and the housing 7 compress the sealing ring 6, the air outlet of the target air duct is closed, so that the present invention can achieve the effect of preventing air leakage. Moreover, since when the conical wind cap 5 and the housing 7 compress the sealing ring 6, each part of the sealing ring 6 is evenly stressed, it is not easy for the present invention to have a situation where local depression and deformation are serious due to uneven stress on each part of the sealing ring 6, resulting in air leakage.

[0074] In the embodiment of the present invention, the material of the sealing ring can be silicone.

[0075] In the embodiments of the present invention, the control circuit board can also be used for:

[0076] (1) When the air outlet of the target air duct is closed, obtain the first actual pressure difference on both sides of the conical air cap.

[0077] (2) Calculate the first absolute value of the difference between the first actual pressure difference and the preset pressure difference.

[0078] (3) Determine whether the first absolute value is greater than the preset absolute value threshold.

[0079] (4) If the first absolute value is greater than the preset absolute value threshold, it indicates that there is a leakage when the air outlet of the target air duct is closed. Therefore, with the aim of making the second absolute value of the difference between the second actual pressure difference on both sides of the conical air cap and the preset pressure difference not greater than the preset threshold when the air outlet of the target air duct is closed, adjust the working parameters of the driving device according to the first absolute value. In this way, the problem of leakage when the air outlet of the target air duct is closed is solved.

[0080] Specifically, a pressure sensor and a control device can be integrated on the control circuit board. When the control device determines that the air outlet of the target air duct is closed, it can obtain the pressures on both sides of the conical air cap through the pressure detection device, calculate the first actual pressure difference, and then calculate the first absolute value of the difference between the first actual pressure difference and the preset pressure difference, and determine whether the first absolute value is greater than the preset absolute value threshold. If the first absolute value is greater than the preset absolute value threshold, it indicates that there is a leakage when the air outlet of the target air duct is closed. Therefore, with the aim of making the second absolute value of the difference between the second actual pressure difference on both sides of the conical air cap and the preset pressure difference not greater than the preset threshold when the air outlet of the target air duct is closed, adjust the working parameters of the driving device according to the first absolute value.

[0081] In the embodiments of the present invention, a bus interface can also be integrated on the control circuit board 2. The bus interface is communicatively connected to the control device and is used to support the communication between the control device and external devices.

[0082] The bus interface can include a Modbus (Modbus Communication Protocol Suite) bus interface and a KNX (Konnex Bus, the evolved standard of the original European Installation Bus EIB), enabling the present application to meet the relevant requirements of international standard fieldbus technology.

[0083] In the embodiments of the present invention, a wireless communication chip can also be integrated on the control circuit board 2. The wireless communication chip is communicatively connected to the control device and is used to support the communication between the control device and external devices.

[0084] The wireless communication chip may include a Wi-Fi 6 + Mesh chip. The Wi-Fi 6 + Mesh chip is a wireless system-on-chip optimized for mesh networks. It not only has the high-speed transmission ability of Wi-Fi 6 but also integrates the Mesh networking function through hardware or software, enabling this application to meet the Thread-based Matter protocol and achieve interconnection and interoperability with different brand devices that meet the Matter protocol. That is, other brand systems that meet the Matter protocol can choose to work in cooperation with this air valve.

[0085] In the embodiment of the present invention, three slide rails are provided on the bottom surface of the bottom edge of the conical wind cap 5; through holes corresponding to the slide rails are provided on the conical flow guiding wind cover 4. After the slide rails are inserted into the corresponding through holes, it can prevent the conical wind cap 5 from rotating and enable the conical wind cap 5 to slide stably.

[0086] In the embodiment of the present invention, the number of slide rails can be three, or it can be other numbers.

[0087] Among them, there is a round tube with internal threads inside the concentric axis of the conical wind cap. The pitch of the internal threads is the same as the pitch of the threaded drive rod of the stepper motor, so that the conical wind cap and the threaded drive rod are meshed through a threaded structure. Furthermore, when the stepper motor rotates, it will drive the conical wind cap to move forward and backward. For each pulse received by the stepper motor, it will rotate a step angle, and the pitch of the stepper motor will step forward or backward by a distance of dr.

[0088] It can be understood that the same or similar parts in the above embodiments can be referred to each other, and the content not detailed in some embodiments can be seen in the same or similar content of other embodiments.

[0089] It should be noted that in the description of the present invention, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In addition, in the description of the present invention, unless otherwise specified, the meaning of "a plurality" refers to at least two.

[0090] In the description of this specification, the description referring to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0091] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

Claims

1. An electric air valve with the function of accurately controlling the air intake volume, characterized in that: include: Panel, control circuit board, drive unit, conical air deflector, conical hood, housing and preset fan; The panel is mechanically connected to the bottom surface of the bottom edge of the conical air deflector, and the top surface of the bottom edge of the conical air deflector is mechanically connected to the shell; The control circuit board and the driving device are arranged in a space surrounded by the panel and the conical air guide cover, the driving device is installed on the control circuit board, and the conical air hood is arranged in a space surrounded by the conical air guide cover and the shell; the central axes of the conical air guide cover, the conical air hood and the unit pipe in the shell coincide with each other, and the tops of the conical air guide cover and the conical air hood face the unit pipe; The driving rod of the driving device passes through the conical air guide cover and is mechanically connected to the conical air cap, and drives the conical air cap to slide along the direction of the central axis according to the control instruction sent by the control circuit board to change the size of the air outlet of the target air duct; the target air duct is the air duct formed between the top surface of the conical air cap and the unit pipe; The control circuit board is used for generating the control instruction according to the target air intake volume and sending it to the driving device when it is determined that the air intake volume of the target air duct needs to be adjusted to the target air intake volume; The preset fan is arranged in the unit pipeline.

2. The electric air valve with the function of accurately controlling the air intake volume according to claim 1 is characterized in that: The control circuit board is specifically used for: When it is determined that the air intake volume of the target air duct needs to be adjusted to the target air intake volume, the working parameters of the driving device are calculated according to the target air intake volume and the following formula to obtain the working parameter calculation result: Wherein, Q is the actual air intake, C is the flow coefficient of the unit pipe, V is the wind speed, r2 is the radius of the inner pipe of the unit pipe, θ is half of the cone angle of the conical hood, r=(r2-r1)tgθ, r1 is the point on the conical hood that is closest to the inner pipe of the unit pipe when the conical hood slides under the drive of the driving device, and the radius of the circle formed by the point rotating around the central axis of the conical hood for one circle; S i is the pulse number of the ith pulse, is the step angle of the ith pulse, p is the pitch of the driving rod of the driving device; n is the preset number of pulses; Generate the control instruction according to the calculation result of the working parameter; The control instruction is sent to the driving device.

3. The electric air valve with the function of accurately controlling the air intake volume according to claim 1 is characterized in that: Also includes: Sealing ring; The sealing ring is arranged between the conical hood and the housing, and is fixedly connected to the top surface of the bottom edge of the conical hood; When the conical hood and the shell press the sealing ring tightly, the air outlet of the target air duct is closed.

4. The electric air valve with the function of accurately controlling the air intake volume according to claim 3 is characterized in that: The sealing ring is made of silicone.

5. The electric air valve with the function of accurately controlling the air intake volume according to claim 3 is characterized in that: The control circuit board is also used for: When the air outlet of the target air duct is closed, obtaining a first actual pressure difference between two sides of the conical air hood; Calculating a first absolute value of a difference between the first actual pressure difference and a preset pressure difference; Determining whether the first absolute value is greater than a preset absolute value threshold; If the first absolute value is greater than the preset absolute value threshold, the working parameters of the driving device are adjusted according to the first absolute value with the purpose of ensuring that when the air outlet of the target air duct is closed, the second absolute value of the difference between the second actual pressure difference on both sides of the conical hood and the preset pressure difference is not greater than the preset threshold.

6. The electric air valve with the function of accurately controlling the air intake volume according to claim 1 is characterized in that: A bus interface is integrated on the control circuit board.

7. The electric air valve with the function of accurately controlling the air intake volume according to claim 6 is characterized in that: The bus interface includes a Modbus bus interface and a KNX bus interface.

8. The electric air valve with the function of accurately controlling the air intake volume according to claim 1 is characterized in that: A wireless communication chip is integrated on the control circuit board.

9. The electric air valve with the function of accurately controlling the air intake volume according to claim 8 is characterized in that: The wireless communication chip includes a Wi-Fi6+Mesh chip.

10. The electric air valve with the function of accurately controlling the air intake volume according to claim 1, characterized in that: The bottom surface of the bottom edge of the conical hood is provided with three slide rails, and the three slide rails form an equilateral triangle bracket state; The conical air guide hood is provided with a through hole corresponding to the slide rail. After the slide rail is inserted into the corresponding through hole, the conical air guide hood is prevented from rotating along with the driving rod.

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