Pressure regulating device for oil leakage nozzle, pressure regulating control method and system thereof, and range hood

Abstract

The present application relates to a kind of oil leakage nozzle pressure regulating device, oil leakage nozzle pressure regulating control method and its system and extractor hood.The oil leakage nozzle pressure regulating device, for being equipped in the volute of fan system, include: pressure regulating cavity, with pressure regulating chamber, oil inlet in the upper portion of the pressure regulating cavity and the oil inlet with the pressure regulating chamber communication and oil outlet and air inlet in the lower portion of the pressure regulating cavity and the oil outlet with the pressure regulating chamber communication;Oil leakage pipe, one end of the oil leakage pipe is communicated with the oil inlet, the other end of the oil leakage pipe is used to communicate the oil leakage nozzle of the volute;Opening and closing mechanism, be set at the oil outlet of the pressure regulating cavity, for opening or closing the oil outlet;And air supply mechanism, be set at the air inlet of the pressure regulating cavity, for air supply in the pressure regulating chamber via the air inlet, to adjust the pressure in the pressure regulating chamber.

Description

Technical Field

[0001] This invention relates to the field of kitchen equipment technology, and in particular to an oil leak nozzle pressure regulating device, an oil leak nozzle pressure regulating control method and system, and a range hood. Background Technology

[0002] In recent years, range hoods have gradually become an indispensable kitchen appliance in many households. Their main function is to draw in the cooking fumes generated during cooking through the impeller of the fan system, filter the fumes using the inlet filter and the impeller, and then exhaust the filtered fumes from the outlet, thus purifying the kitchen environment. Among these components, the volute is the core component of the fan system, and its working condition has a significant impact on the use of the range hood.

[0003] Currently, the oil drain nozzles on the volute of range hoods on the market all adopt a relatively simple structure. That is, after the range hood is installed, a hole is directly drilled at the lowest point of the volute to achieve the oil drain function. In order to prevent clogging during long-term use, the diameter of the hole is generally large. This has a significant impact on the working condition of the range hood: it not only reduces the air volume of the range hood, but also increases the noise during use, causing a significant decline in the performance of the range hood and seriously affecting the user experience. Summary of the Invention

[0004] Therefore, it is necessary to address the problem that the large diameter of the oil leak nozzle in existing range hoods not only reduces the airflow of the range hood but also increases noise during use, seriously affecting the user experience. This invention provides an oil leak nozzle pressure regulating device, an oil leak nozzle pressure regulating control method and system, and a range hood.

[0005] In one embodiment of this application, the present invention provides an oil leak nozzle pressure regulating device for mounting on the volute of a fan system, comprising:

[0006] The pressure regulating chamber has a pressure regulating chamber, an oil inlet located at the upper part of the pressure regulating chamber and communicating with the pressure regulating chamber, and an oil outlet and an air inlet located at the lower part of the pressure regulating chamber and communicating with the pressure regulating chamber.

[0007] An oil leak pipe, one end of which is connected to the oil inlet, and the other end of which is used to connect to the oil leak nozzle of the volute.

[0008] An opening and closing mechanism is disposed at the oil outlet of the pressure regulating chamber for opening or closing the oil outlet; and

[0009] An air supply mechanism is disposed at the air inlet of the pressure regulating chamber and is used to supply air into the pressure regulating chamber through the air inlet to regulate the pressure in the pressure regulating chamber.

[0010] In one embodiment of this application, the opening and closing mechanism includes an opening and closing plate for blocking or opening the oil outlet, a first drive motor, and a transmission assembly disposed between the opening and closing plate and the first drive motor.

[0011] In one embodiment of this application, the transmission assembly includes a lead screw fixedly connected to the output shaft of the first drive motor and a nut fixed to the opening and closing plate, the nut being threadedly connected to the lead screw.

[0012] In one embodiment of this application, the air supply mechanism includes a fan wheel whose shell is rotatably disposed at the air inlet and a second drive motor that is drivenly connected to the fan wheel.

[0013] According to another aspect of this application, this application further provides a method for regulating and controlling the pressure of an oil leak nozzle, comprising the steps of:

[0014] Obtain the current status parameters of the range hood, including the oil leak nozzle pressure, the pressure regulating room pressure, the pressure regulating outdoor pressure, the oil fume concentration, and the impeller speed;

[0015] Determine if the pressure of the leaking nozzle exceeds a preset pressure threshold: if yes, when the outlet of the leaking nozzle pressure regulating device is open, control the opening and closing mechanism of the device to close the outlet, thereby updating the current status parameter; if no, retain the current status parameter; and

[0016] Based on the current state parameters, the speed of the impeller in the air supply mechanism of the oil leak nozzle pressure regulating device is controlled to adjust the pressure loss at the oil leak nozzle.

[0017] In one embodiment of this application, the step of controlling the impeller speed of the air supply mechanism in the oil leak nozzle pressure regulating device based on the current state parameter to adjust the pressure loss at the oil leak nozzle includes the following steps:

[0018] Calculate the pressure difference between the leak nozzle pressure and the pressure regulating chamber pressure in this current state parameter;

[0019] Determine whether the ratio of the pressure difference to the pressure of the leaking nozzle is greater than or equal to a ratio threshold;

[0020] In response to a value greater than or equal to the ratio threshold, the required pressure chamber pressure of the oil leak nozzle pressure regulating device is calculated using the ratio threshold model;

[0021] Based on the outdoor pressure of the pressure regulating chamber and the required indoor pressure of the oil leak nozzle pressure regulating device in the current state parameters, the required wind turbine speed of the oil leak nozzle pressure regulating device is calculated using the wind turbine speed model; and

[0022] Based on the required impeller speed of the oil leak nozzle pressure regulating device, the impeller speed of the air supply mechanism in the oil leak nozzle pressure regulating device is controlled accordingly.

[0023] In one embodiment of this application, the ratio threshold model is (p1-p2) / p1 = k1*(r1 / c1). 2 +k2; where: p1 is the oil leak nozzle pressure in the current state parameters; p2 is the pressure in the regulating chamber required by the oil leak nozzle pressure regulating device; r1 and c1 are the impeller speed and oil fume concentration in the current state parameters, respectively; k1 and k2 are constants.

[0024] In one embodiment of this application, the step of controlling the impeller speed of the air supply mechanism in the oil leak nozzle pressure regulating device based on the impeller speed required by the oil leak nozzle pressure regulating device includes the following steps:

[0025] Determine whether the required impeller speed of the oil leak pressure regulating device is greater than or equal to the maximum speed of the air supply mechanism;

[0026] In response to the required rotor speed being less than the maximum speed, the rotor speed of the air supply mechanism is controlled to be maintained at the required rotor speed;

[0027] In response to the required rotor speed being greater than or equal to the maximum speed, it is determined whether the oil outlet is in a closed state;

[0028] In response to the oil outlet being closed, the impeller speed of the air supply mechanism is maintained at the maximum speed; and

[0029] In response to the oil outlet being in the open state, the opening and closing mechanism is first controlled to close the oil outlet, and the impeller speed of the air supply mechanism is controlled to be maintained at the maximum speed.

[0030] In one embodiment of this application, the step of controlling the impeller speed of the air supply mechanism in the oil leak nozzle pressure regulating device based on the current state parameter to adjust the pressure loss at the oil leak nozzle further includes the step of:

[0031] In response to a value less than the ratio threshold, it is determined whether the oil fume concentration in the current state parameter is greater than or equal to the oil fume concentration threshold, so as to control the impeller speed of the air supply mechanism accordingly when it is greater than or equal to the oil fume concentration threshold.

[0032] In one embodiment of this application, the step of determining whether the oil fume concentration in the current state parameter is greater than or equal to the oil fume concentration threshold in response to a ratio threshold, so as to control the impeller speed of the air supply mechanism accordingly when it is greater than or equal to the oil fume concentration threshold, includes the following steps:

[0033] When the oil fume concentration in the current state parameter is greater than or equal to the oil fume concentration threshold, determine whether the current oil fume concentration is greater than or equal to the maximum recorded concentration of the range hood.

[0034] In response to the current oil fume concentration being greater than or equal to the maximum recorded concentration, the current oil fume concentration is updated to the maximum recorded concentration of the range hood, and the required impeller speed of the oil leak nozzle pressure regulating device is calculated using the speed ratio model.

[0035] In response to the current oil fume concentration being less than the maximum recorded concentration, the required impeller speed for the oil leak nozzle pressure regulating device is calculated using a speed proportional model; and

[0036] The impeller speed of the air supply mechanism is controlled to be maintained at the impeller speed required by the oil leak pressure regulating device.

[0037] In one embodiment of this application, the rotation speed ratio model is r2 = k3 * r3 * c1 / c3; where: r2 is the impeller speed required by the oil leak nozzle pressure regulating device; k3 is the preset rotation speed threshold coefficient; c1 is the current oil fume concentration; and c3 is the maximum recorded concentration of the range hood.

[0038] In one embodiment of this application, before the step of obtaining the current state parameters of the range hood, the following step is further included:

[0039] In response to the range hood being started to operate at a certain setting, it is determined whether the oil outlet of the oil leak nozzle pressure regulating device is in the open state; if not, the opening and closing mechanism of the oil leak nozzle pressure regulating device is controlled to open the oil outlet.

[0040] In one embodiment of this application, before the step of controlling the impeller speed of the air supply mechanism in the oil leak nozzle pressure regulating device based on the current state parameter to adjust the pressure loss at the oil leak nozzle, the following step is further included:

[0041] Determine whether the range hood's fan system is turned off;

[0042] In response to the range hood's fan system being off, the air supply mechanism in the oil leak nozzle pressure regulating device is controlled to stop working, and the opening and closing mechanism in the oil leak nozzle pressure regulating device is controlled to open the oil outlet; and

[0043] In response to the fact that the fan system of the range hood is in the on state, return to the step of obtaining the current state parameters of the range hood.

[0044] According to another aspect of this application, this application further provides an oil leak nozzle pressure regulating control system, comprising:

[0045] processor; and

[0046] A storage medium storing computer program instructions, which, when executed by the processor, cause the processor to perform the oil leak nozzle pressure regulation control method described above.

[0047] According to another aspect of this application, this application further provides a range hood, comprising:

[0048] The fan system includes a volute with an oil drain and an impeller rotatably disposed within the volute; and

[0049] The oil leak nozzle pressure regulating device described above is assembled on the volute and is used to regulate the pressure loss at the oil leak nozzle.

[0050] In summary, the oil leak nozzle pressure regulating device of this application can open or close the oil outlet through the opening and closing mechanism, and send air into the pressure regulating chamber through the air inlet via the air supply mechanism to regulate the pressure in the pressure regulating chamber, so that the pressure loss at the oil leak nozzle can be regulated, so as to adjust the pressure according to the current fan system status of the range hood, and realize that the pressure loss and noise at the oil leak nozzle are under control, thus improving the performance for users. Attached Figure Description

[0051] Figure 1 This is a schematic diagram of the structure of a range hood according to an embodiment of this application;

[0052] Figure 2 A perspective view of the oil leak nozzle pressure regulating device in a range hood according to the above embodiments of this application is shown;

[0053] Figure 3 A perspective cross-sectional schematic diagram of an oil leak nozzle pressure regulating device according to the above embodiments of this application is shown;

[0054] Figure 4 This is a schematic flowchart of a leak nozzle pressure regulation control method according to an embodiment of this application;

[0055] Figures 5 to 7 A flowchart illustrating the impeller speed control step in the oil leak nozzle pressure regulation control method according to the above embodiments of this application is shown.

[0056] Figure 8 A schematic diagram of a specific control process of the oil leak nozzle pressure regulation control method according to the above embodiments of this application is shown;

[0057] Figure 9 This is a block diagram of a pressure regulating control system for an oil leak nozzle according to an embodiment of this application.

[0058] Key component symbols: 1. Range hood; 10. Fan system; 11. Volute; 110. Oil leak nozzle; 12. Impeller; 20. Oil leak nozzle pressure regulating device; 21. Pressure regulating chamber; 211. Pressure regulating chamber; 212. Oil inlet; 213. Oil outlet; 214. Air inlet; 22. Oil leak pipe; 23. Opening and closing mechanism; 231. Opening and closing plate; 232. First drive motor; 233. Transmission assembly; 2331. Lead screw; 2332. Nut; 24. Air supply mechanism; 241. Fan wheel; 242. Second drive motor; 30. Oil leak nozzle pressure regulating control system; 31. Processor; 32. Storage medium.

[0059] The above description of the main component symbols, together with the accompanying drawings and specific embodiments, provides a more detailed explanation of the present invention. Detailed Implementation

[0060] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0061] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0062] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0063] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0064] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0065] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0066] Considering that the large diameter of the grease leak nozzle on the volute of existing range hoods not only reduces the airflow but also increases noise during use, significantly degrading the range hood's performance and severely impacting the user experience. Therefore, this application provides a grease leak nozzle pressure regulating device, a grease leak nozzle pressure regulating control method and system, and a range hood. This device can regulate the pressure according to the current fan system status of the range hood, keeping the pressure loss and noise at the grease leak nozzle under control. This allows the range hood to maintain a working state as close as possible to that without a grease leak nozzle, improving user experience.

[0067] Specifically, refer to Figures 1 to 3As shown, one embodiment of this application provides a range hood 1, which may include a fan system 10 and an oil leak nozzle pressure regulating device 20. The fan system 10 includes a volute 11 with an oil leak nozzle 110 and an impeller 12 rotatably disposed within the volute 11. The oil leak nozzle pressure regulating device 20 is mounted on the volute 11 and is used to regulate the pressure loss at the oil leak nozzle 110, thereby regulating the air leakage at the oil leak nozzle 110, so that both pressure loss and noise are under control.

[0068] More specifically, such as Figure 2 and Figure 3 As shown, the oil leak nozzle pressure regulating device 20 may include a pressure regulating chamber 21, an oil leak pipe 22, an opening and closing mechanism 23, and an air supply mechanism 24. The pressure regulating chamber 21 has a pressure regulating chamber 211, an oil inlet 212 located at the upper part of the pressure regulating chamber 21 and communicating with the pressure regulating chamber 211, and an oil outlet 213 and an air inlet 214 located at the lower part of the pressure regulating chamber 21 and communicating with the pressure regulating chamber 211. One end of the oil leak pipe 22 is connected to the oil inlet 212, and the other end of the oil leak pipe 22 is used to connect to the oil leak nozzle 110. The opening and closing mechanism 23 is provided at the oil outlet 213 of the pressure regulating chamber 21 and is used to open or close the oil outlet 213. The air supply mechanism 24 is provided at the air inlet 214 of the pressure regulating chamber 21 and is used to supply air into the pressure regulating chamber 211 through the air inlet 214 to regulate the pressure in the pressure regulating chamber 211 and thereby regulate the pressure loss at the oil leak nozzle 110.

[0069] It is worth noting that when the pressure loss at the oil leak nozzle 110 is large, it indicates that the pressure difference inside and outside the volute 11 is large, resulting in a large amount of air leakage through the oil leak nozzle 110 and consequently, a large amount of noise. The oil leak nozzle pressure regulating device 20 of this application can open or close the oil outlet 213 through the opening and closing mechanism 23, and supply air to the pressure regulating chamber 211 through the air inlet 214 via the air supply mechanism 24 to regulate the pressure in the pressure regulating chamber 211. This allows the pressure loss at the oil leak nozzle 110 to be regulated, so that the pressure can be adjusted according to the current fan system status of the range hood, thereby keeping the pressure loss and noise at the oil leak nozzle under control and improving the performance for the user.

[0070] For example, such as Figure 2 and Figure 3 As shown, the opening and closing mechanism 23 may include an opening and closing plate 231 for sealing or opening the oil outlet 213, a first drive motor 232, and a transmission assembly 233 disposed between the opening and closing plate 231 and the first drive motor 232. Thus, driven by the first drive motor 232, the transmission assembly 233 moves the opening and closing plate 231 relative to the pressure regulating chamber 21 to seal or open the oil outlet 213, thereby opening or closing the oil outlet 213.

[0071] Optionally, such as Figure 2 and Figure 3 As shown, the transmission assembly 233 includes a lead screw 2331 fixedly connected to the output shaft of the first drive motor 232 and a nut 2332 fixed to the opening and closing plate 231. The nut 2332 is threadedly connected to the lead screw 2331 to convert the rotational motion of the first drive motor 232 into the linear motion of the opening and closing plate 231, so that the opening and closing plate 231 can translate relative to the pressure regulating chamber 21 to block or open the oil outlet 213. It is understood that in other examples of this application, the transmission assembly 233 can also drive the opening and closing plate 231 to rotate relative to the pressure regulating chamber 21 under the drive of the first drive motor 232, as long as it can block or open the oil outlet 213, which will not be described in detail in this application.

[0072] Optionally, such as Figure 2 and Figure 3 As shown, the air supply mechanism 24 may include a fan wheel 241 rotatably disposed on the air inlet 214 and a second drive motor 242 driven by the fan wheel 241. The fan wheel 241 rotates relative to the pressure regulating chamber 21 under the drive of the second drive motor 242 to supply air into the pressure regulating chamber 211 through the air inlet 214, thereby regulating the pressure in the pressure regulating chamber 211.

[0073] It is worth noting that, in the above embodiments of this application, the oil leak nozzle pressure regulating device 20 may further include a sensor assembly (not shown in the figure) for detecting the pressure at the oil leak nozzle 110, the pressure inside the pressure regulating chamber 211, the pressure outside the pressure regulating chamber 211 (i.e., at the oil outlet 213), the oil fume concentration at the inlet of the volute 11, the rotational speed of the impeller 12, and the rotational speed of the fan wheel 241, so as to obtain the oil leak nozzle pressure p1, the pressure inside the pressure regulating chamber p2, the pressure outside the pressure regulating chamber p3, the oil fume concentration c1, the impeller rotational speed r1, and the fan wheel rotational speed r2 accordingly, so as to adjust the pressure according to the current fan system status of the range hood and realize that the pressure loss and noise at the oil leak nozzle are under control.

[0074] It is worth mentioning that, according to another aspect of this application, such as Figure 4 As shown, one embodiment of this application further provides a method for regulating and controlling the pressure of an oil leak nozzle, which may include the following steps:

[0075] S200: Obtain the current status parameters of the range hood, including the oil leak nozzle pressure, the pressure regulating indoor chamber pressure, the pressure regulating outdoor chamber pressure, the oil fume concentration, and the impeller speed;

[0076] S300: Determine whether the pressure of the leaking nozzle is greater than a preset pressure threshold: If yes, when the outlet of the leaking nozzle pressure regulating device is in the open state, control the opening and closing mechanism of the leaking nozzle pressure regulating device to close the outlet, thereby updating the current state parameter; if no, retain the current state parameter; and

[0077] S400: Based on the current state parameters, control the speed of the impeller of the air supply mechanism in the oil leak nozzle pressure regulating device to adjust the pressure loss at the oil leak nozzle.

[0078] More specifically, the preset pressure threshold p0 mentioned in this application is determined based on the maximum static pressure of the range hood at its operating setting. For example, if the maximum static pressure of the range hood at its operating setting is m0, then p0 = k0 * m0, where the value of k0 ranges from 0.5 to 0.8 and can be adjusted according to the performance of different range hood models.

[0079] It is worth noting that the current state parameter mentioned in step S400 of this application refers to the latest parameter. That is, if the pressure of the oil leak nozzle is greater than the preset pressure threshold, it is the updated current state parameter; if the pressure of the oil leak nozzle is less than or equal to the preset pressure threshold, it is the retained current state parameter.

[0080] For example, such as Figure 5 As shown, step S400 in the oil leak nozzle pressure regulation control method of this application may include the following steps:

[0081] S410: Calculate the pressure difference between the leaking nozzle pressure and the pressure regulating chamber pressure in the current status parameter;

[0082] S420: Determine whether the ratio of the pressure difference to the pressure of the leaking nozzle is greater than or equal to the ratio threshold;

[0083] S430: In response to a value greater than or equal to the ratio threshold, the required pressure chamber pressure of the oil leak nozzle pressure regulating device is calculated using the ratio threshold model;

[0084] S440: Based on the outdoor pressure of the pressure regulating chamber and the required indoor pressure of the oil leak nozzle pressure regulating device in the current state parameters, the required wind turbine speed of the oil leak nozzle pressure regulating device is calculated using the wind turbine speed model; and

[0085] S450: Based on the required impeller speed of the oil leak nozzle pressure regulating device, the impeller speed of the air supply mechanism in the oil leak nozzle pressure regulating device is controlled accordingly.

[0086] It is worth noting that the ratio threshold f1 mentioned in this application is determined by the oil fume concentration c1 and the impeller speed r1 in the current state parameters, and it can be a function of the impeller speed r1 and the oil fume concentration c1, such as f1 = k1*(r1 / c1). 2+k2; where k1 and k2 are constants. In other words, the ratio threshold f1 of this application is proportional to the square of the ratio of impeller speed r1 to oil fume concentration c1, and its value can range from 0.5 to 1. It can be understood that when the ratio of the pressure difference to the oil leak pressure is greater than or equal to the ratio threshold, it indicates that the pressure loss at the oil leak in the range hood is large, that is, the air leakage is large and the noise is also large. At this time, the oil leak pressure regulation control method of this application first calculates the pressure chamber pressure required by the oil leak pressure regulation device, and then calculates the impeller speed required by the oil leak pressure regulation device, so as to control the impeller speed in the air supply mechanism of the oil leak pressure regulation device accordingly, thereby adjusting the pressure loss at the oil leak in the range hood, which can improve the working performance of the range hood while reducing noise.

[0087] Optionally, the ratio threshold model is implemented as: (p1-p2) / p1=k1*(r1 / c1) 2 +k2;

[0088] Where: p1 is the oil leak nozzle pressure in the current state parameters; p2 is the pressure in the regulating chamber required by the oil leak nozzle pressure regulating device; r1 and c1 are the impeller speed and oil fume concentration in the current state parameters, respectively; k1 and k2 are constants.

[0089] In other words, in step S430 of this application: let dep1 / p1=f1(r1,c1), where dep1=p1-p2, the pressure p2 required in the regulating chamber of the oil leak nozzle pressure regulating device can be calculated.

[0090] Alternatively, the wind turbine rotation speed model is implemented as: p2-p3=f2(r2);

[0091] Where: p2 is the pressure inside the regulating chamber required by the oil leak nozzle pressure regulating device; p3 is the pressure outside the regulating chamber in the current state parameters; r2 is the wind turbine speed required by the oil leak nozzle pressure regulating device; f2(r2) is the difference function with respect to the wind turbine speed r2, which can be obtained from experiments or experience, for example f2(r2)=a*r2+b, where a and b are constants.

[0092] It is worth noting that the impeller speed of the air supply mechanism in the oil leak nozzle pressure regulating device usually has a maximum speed r3. If the required impeller speed r2 of the oil leak nozzle pressure regulating device is greater than or equal to the maximum speed r3, and the impeller speed of the air supply mechanism cannot be greater than the maximum speed r3, in order to regulate the pressure in the pressure regulating chamber to the required pressure as much as possible, the oil leak nozzle pressure regulating control method of this application needs to further determine whether the oil outlet of the oil leak nozzle pressure regulating device is closed, and when the oil outlet is in the open state, first control the opening and closing mechanism of the oil leak nozzle pressure regulating device to close the oil outlet, and then control the impeller speed of the air supply mechanism in the oil leak nozzle pressure regulating device to be kept at the maximum speed r3.

[0093] For example, such as Figure 6 As shown, step S450 in the oil leak nozzle pressure regulation control method of this application may include the following steps:

[0094] S451: Determine whether the required impeller speed of the oil leak nozzle pressure regulating device is greater than or equal to the maximum speed of the air supply mechanism;

[0095] S452: In response to the required rotor speed being less than the maximum speed, the rotor speed of the air supply mechanism is controlled to be maintained at the required rotor speed;

[0096] S453: In response to the required rotor speed being greater than or equal to the maximum speed, determine whether the oil outlet is in a closed state;

[0097] S454: In response to the oil outlet being closed, the impeller speed of the air supply mechanism is controlled to remain at the maximum speed; and

[0098] S455: In response to the oil outlet being in the open state, first control the opening and closing mechanism to close the oil outlet, and then control the impeller speed of the air supply mechanism to be maintained at the maximum speed.

[0099] It is worth noting that when the ratio of this pressure difference to the pressure of the grease leak nozzle is less than a certain threshold, although it indicates that the pressure loss at the grease leak nozzle in the range hood is not significant, i.e., the air leakage is not large, it will still affect the range hood's smoke extraction performance. In this case, if the smoke concentration at the inlet of the range hood's volute is high, the user will prefer a stronger smoke extraction performance to quickly remove the smoke. Based on this, if... Figure 5 As shown, step S400 in the oil leak nozzle pressure regulation control method of this application may further include the following step:

[0100] S460: In response to a value less than the ratio threshold, determine whether the oil fume concentration in the current state parameter is greater than or equal to the oil fume concentration threshold, so as to control the impeller speed of the air supply mechanism accordingly when it is greater than or equal to the oil fume concentration threshold.

[0101] Specifically, such as Figure 7 As shown, step S460 in the oil leak nozzle pressure regulation control method may include the following steps:

[0102] S461: When the oil fume concentration in the current state parameter is greater than or equal to the oil fume concentration threshold, determine whether the current oil fume concentration is greater than or equal to the maximum recorded concentration of the range hood.

[0103] S462: In response to the current oil fume concentration being greater than or equal to the maximum recorded concentration, update the current oil fume concentration to the maximum recorded concentration of the range hood, and calculate the required impeller speed of the oil leak nozzle pressure regulating device through the speed ratio model;

[0104] S463: In response to the current oil fume concentration being less than the maximum recorded concentration, calculate the required impeller speed for the oil leak nozzle pressure regulating device using a speed proportional model; and

[0105] S464: Control the impeller speed of the air supply mechanism to maintain the impeller speed required by the oil leak pressure regulating device.

[0106] More specifically, the speed ratio model mentioned in this application can be implemented as: r2 = k3 * r3 * c1 / c3;

[0107] Where: r2 is the impeller speed required by the oil leak nozzle pressure regulating device; k3 is the preset speed threshold coefficient, which ranges from 0 to 1; c1 is the current oil fume concentration; and c3 is the maximum recorded concentration of the range hood.

[0108] According to the above embodiments of this application, as Figure 4 As shown, the oil leak nozzle pressure regulation control method of this application may further include the following steps before step S200:

[0109] S100: In response to the range hood being started and operating at a certain speed, it is determined whether the oil outlet of the oil leak nozzle pressure regulating device is in the open state. If not, the opening and closing mechanism of the oil leak nozzle pressure regulating device is controlled to open the oil outlet. In this way, the oil leak nozzle pressure regulating control method of this application can ensure that the oil outlet is in the open state in the initial stage after the range hood is started, so as to accurately assess the pressure loss at the oil leak nozzle and make accurate control.

[0110] In addition, such as Figure 4 As shown, the oil leak nozzle pressure regulation control method of this application may further include the following step after step S400:

[0111] S500: Determine whether the fan system of the range hood is turned off;

[0112] S600: In response to the range hood's fan system being in a closed state, the air supply mechanism in the oil leak nozzle pressure regulating device is controlled to stop working, and the opening and closing mechanism in the oil leak nozzle pressure regulating device is controlled to open the oil outlet; and

[0113] S700: In response to the range hood's fan system being turned on, return to step S200.

[0114] In summary, as Figure 8 As shown, the specific control process of the oil leak nozzle pressure regulation control method of this application is as follows:

[0115] S1. When the user starts a range hood at a certain setting, the fan system works normally.

[0116] S2. Reset the oil outlet position to the open state. If the oil outlet is in the closed state, control the first drive motor to drive the opening and closing plate to open the oil outlet.

[0117] S3. Obtain the current pressure p1 at the oil leak nozzle inside the volute, the pressure p2 inside the pressure regulating chamber, the oil fume concentration c1 at the inlet of the range hood, the impeller speed r1 of the main fan of the range hood, and the pressure p3 outside the pressure regulating chamber.

[0118] S4. Determine whether the pressure p1 is greater than the preset pressure threshold p0. If yes, proceed to S5; otherwise, proceed to S7.

[0119] S5. If the oil outlet is not closed, control the first drive motor to drive the opening and closing plate to close the oil outlet, and proceed to S6.

[0120] S6. Obtain the latest values ​​of each parameter and proceed to S7;

[0121] S7. Calculate the pressure difference dep1 = p1 - p2;

[0122] S8. Determine whether dep1 / p1 is greater than or equal to f1(r1,c1). If yes, proceed to S13; otherwise, proceed to S9.

[0123] S9. Determine whether c1 is greater than or equal to the oil fume concentration threshold c0. If yes, proceed to S10; otherwise, proceed to S19.

[0124] S10. Determine if c1 is greater than or equal to c3. If yes, proceed to S11; otherwise, proceed to S12. c3 is the maximum value of oil fume concentration since records began.

[0125] S11. Let c3 = c1;

[0126] S12, control the second drive motor to make the wind turbine speed r2=k3*r3*c1 / c3; r3 is the maximum speed that the wind turbine can reach; k3 is the preset speed threshold coefficient, k3∈(0,1); and then proceed to S19;

[0127] S13. Let dep1 / p1 = f1(r1,c1) to calculate the pressure p2, and calculate the required rotational speed r2 of the wind turbine based on p2 and p3;

[0128] S14. Determine if r2 is greater than or equal to r3. If yes, proceed to S16; otherwise, proceed to S15.

[0129] S15. Control the second drive motor to keep the wind turbine speed at r2, then proceed to S19;

[0130] S16. Determine if the oil outlet is closed. If yes, proceed to S18; otherwise, proceed to S17.

[0131] S17. Control the first drive motor to close the oil outlet and proceed to S18;

[0132] S18. Control the second drive motor to keep the wind turbine speed at r3, then proceed to S19;

[0133] S19. Determine whether the user has turned off the fan system. If yes, proceed to S20; otherwise, proceed to S3.

[0134] S20. Control the second drive motor to stop the wind turbine from rotating, and control the first drive motor to reset the oil outlet position to the open state;

[0135] S21, End.

[0136] It is worth mentioning that, according to another aspect of this application, such as Figure 9 As shown, one embodiment of this application further provides an oil leak nozzle pressure regulation control system 30, which may include a processor 31 and a storage medium 32. The storage medium 32 stores computer program instructions, which, when executed by the processor 31, cause the processor 31 to perform the above-described oil leak nozzle pressure regulation control method.

[0137] It is understood that the processor 31 may be a central processing unit (CPU) or other processing unit with data processing capabilities and / or instruction execution capabilities, and may control other components in the oil leak nozzle pressure regulation control system 30 to perform desired functions. The storage medium 32 may include one or more computer program products, which may include various forms of computationally readable storage media, such as volatile memory and / or non-volatile memory. The volatile memory may, for example, include random access memory (RAM) and / or cache memory. The non-volatile memory may, for example, include read-only memory (ROM), hard disk, flash memory, etc. One or more computer program instructions may be stored on the computationally readable storage medium, and the processor 31 may execute these program instructions to implement the methods of the various embodiments of the present invention described above and / or other desired functions.

[0138] Of course, for the sake of simplicity, Figure 9 Only some of the components of the leak nozzle pressure regulating control system 30 relevant to the present invention are shown in this diagram; components such as buses, input / output interfaces, etc., are omitted. In addition, the leak nozzle pressure regulating control system 30 may include any other suitable components depending on the specific application.

[0139] It is worth mentioning that, according to another aspect of this application, one embodiment of this application further provides a range hood, which may include a range hood body (not shown in the figure) and the above-mentioned oil leak nozzle pressure regulation control system 30. The oil leak nozzle pressure regulation control system 30 is disposed on the range hood body to regulate the pressure loss at the oil leak nozzle of the range hood body, so that the noise is controllable.

[0140] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0141] The above embodiments merely illustrate several implementation methods of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention.

Claims

1. An oil leak nozzle pressure regulating device, used for mounting on the volute of a fan system, characterized in that, include: The pressure regulating chamber has a pressure regulating chamber, an oil inlet located at the upper part of the pressure regulating chamber and communicating with the pressure regulating chamber, and an oil outlet and an air inlet located at the lower part of the pressure regulating chamber and communicating with the pressure regulating chamber. An oil leak pipe, one end of which is connected to the oil inlet, and the other end of which is used to connect to the oil leak nozzle of the volute. An opening and closing mechanism is provided at the oil outlet of the pressure regulating cavity to open or close the oil outlet. as well as An air supply mechanism is disposed at the air inlet of the pressure regulating chamber and is used to supply air into the pressure regulating chamber through the air inlet to regulate the pressure in the pressure regulating chamber.

2. The oil leak nozzle pressure regulating device according to claim 1, characterized in that, The opening and closing mechanism includes an opening and closing plate for sealing or opening the oil outlet, a first drive motor, and a transmission assembly disposed between the opening and closing plate and the first drive motor.

3. The oil leak nozzle pressure regulating device according to claim 2, characterized in that, The transmission assembly includes a lead screw fixedly connected to the output shaft of the first drive motor and a nut fixed to the opening and closing plate, the nut being threadedly connected to the lead screw.

4. The oil leak nozzle pressure regulating device according to any one of claims 1 to 3, characterized in that, The air supply mechanism includes a wind turbine whose shell is rotatably disposed at the air inlet and a second drive motor that is drivenly connected to the wind turbine.

5. A method for regulating and controlling the pressure of an oil leak nozzle, characterized in that, The oil leak nozzle pressure regulating device as described in any one of claims 1 to 4 includes the following steps: Obtain the current status parameters of the range hood, including the oil leak nozzle pressure, the pressure regulating room pressure, the pressure regulating outdoor pressure, the oil fume concentration, and the impeller speed; Determine whether the pressure of the leaking nozzle is greater than the preset pressure threshold: if yes, when the oil outlet of the leaking nozzle pressure regulating device is in the open state, control the opening and closing mechanism of the leaking nozzle pressure regulating device to close the oil outlet, so as to update the current status parameter; if no, retain the current status parameter. as well as Based on the current state parameters, the speed of the impeller in the air supply mechanism of the oil leak nozzle pressure regulating device is controlled to adjust the pressure loss at the oil leak nozzle.

6. The oil leak nozzle pressure regulation control method according to claim 5, characterized in that, The step of controlling the impeller speed of the air supply mechanism in the oil leak nozzle pressure regulating device based on the current state parameters to adjust the pressure loss at the oil leak nozzle includes the following steps: Calculate the pressure difference between the leak nozzle pressure and the pressure regulating chamber pressure in this current state parameter; Determine whether the ratio of the pressure difference to the pressure of the leaking nozzle is greater than or equal to a ratio threshold; In response to a value greater than or equal to the ratio threshold, the required pressure chamber pressure of the oil leak nozzle pressure regulating device is calculated using the ratio threshold model; Based on the outdoor pressure of the pressure regulating chamber and the required indoor pressure of the oil leak nozzle pressure regulating device in the current state parameters, the required wind turbine speed of the oil leak nozzle pressure regulating device is calculated using the wind turbine speed model; and Based on the required impeller speed of the oil leak nozzle pressure regulating device, the impeller speed of the air supply mechanism in the oil leak nozzle pressure regulating device is controlled accordingly.

7. The oil leak nozzle pressure regulation control method according to claim 6, characterized in that, The ratio threshold model is (p1-p2) / p1=k1 (r1 / c1) 2 +k2; Where: p1 is the oil leak nozzle pressure in the current state parameters; p2 is the pressure in the regulating chamber required by the oil leak nozzle pressure regulating device; r1 and c1 are the impeller speed and oil fume concentration in the current state parameters, respectively; k1 and k2 are constants.

8. The oil leak nozzle pressure regulation control method according to claim 6, characterized in that, The step of controlling the impeller speed of the air supply mechanism in the oil leak nozzle pressure regulating device based on the required impeller speed includes the following steps: Determine whether the required impeller speed of the oil leak pressure regulating device is greater than or equal to the maximum speed of the air supply mechanism; In response to the required rotor speed being less than the maximum speed, the rotor speed of the air supply mechanism is controlled to be maintained at the required rotor speed; In response to the required rotor speed being greater than or equal to the maximum speed, it is determined whether the oil outlet is in a closed state; In response to the oil outlet being closed, the impeller speed of the air supply mechanism is maintained at the maximum speed; and In response to the oil outlet being in the open state, the opening and closing mechanism is first controlled to close the oil outlet, and the impeller speed of the air supply mechanism is controlled to be maintained at the maximum speed.

9. The oil leak nozzle pressure regulation control method according to claim 6, characterized in that, The step of controlling the impeller speed of the air supply mechanism in the oil leak nozzle pressure regulating device based on the current state parameters to adjust the pressure loss at the oil leak nozzle further includes the step of: In response to a value less than the ratio threshold, it is determined whether the oil fume concentration in the current state parameter is greater than or equal to the oil fume concentration threshold, so as to control the impeller speed of the air supply mechanism accordingly when it is greater than or equal to the oil fume concentration threshold.

10. The oil leak nozzle pressure regulation control method according to claim 9, characterized in that, The step of determining whether the oil fume concentration in the current state parameter is greater than or equal to the oil fume concentration threshold in response to a ratio threshold, and controlling the impeller speed of the air supply mechanism accordingly when the oil fume concentration is greater than or equal to the oil fume concentration threshold, includes the following steps: When the oil fume concentration in the current state parameter is greater than or equal to the oil fume concentration threshold, determine whether the current oil fume concentration is greater than or equal to the maximum recorded concentration of the range hood. In response to the current oil fume concentration being greater than or equal to the maximum recorded concentration, the current oil fume concentration is updated to the maximum recorded concentration of the range hood, and the required impeller speed of the oil leak nozzle pressure regulating device is calculated using the speed ratio model. In response to the current oil fume concentration being less than the maximum recorded concentration, the required impeller speed for the oil leak nozzle pressure regulating device is calculated using a speed ratio model. as well as The impeller speed of the air supply mechanism is controlled to be maintained at the impeller speed required by the oil leak pressure regulating device.

11. The oil leak nozzle pressure regulation control method according to claim 10, characterized in that, The speed ratio model is r2=k3 r3 c1 / c3; where: r2 is the impeller speed required by the oil leak nozzle pressure regulating device; k3 is the preset speed threshold coefficient; c1 is the current oil fume concentration; c3 is the maximum recorded concentration of the range hood.

12. The oil leak nozzle pressure regulation control method according to any one of claims 5 to 11, characterized in that, Before the step of obtaining the current status parameters of the range hood, the following step is also included: In response to the range hood being started to operate at a certain setting, it is determined whether the oil outlet of the oil leak nozzle pressure regulating device is in the open state; if not, the opening and closing mechanism of the oil leak nozzle pressure regulating device is controlled to open the oil outlet.

13. The oil leak nozzle pressure regulation control method according to any one of claims 5 to 11, characterized in that, Before the step of controlling the impeller speed of the air supply mechanism in the oil leak nozzle pressure regulating device based on the current state parameters to adjust the pressure loss at the oil leak nozzle, the following step is also included: Determine whether the range hood's fan system is turned off; In response to the range hood's fan system being off, the air supply mechanism in the oil leak nozzle pressure regulating device is controlled to stop working, and the opening and closing mechanism in the oil leak nozzle pressure regulating device is controlled to open the oil outlet; and In response to the fact that the fan system of the range hood is in the on state, return to the step of obtaining the current state parameters of the range hood.

14. An oil leak nozzle pressure regulating control system, characterized in that, include: processor; and A storage medium storing computer program instructions, which, when executed by the processor, cause the processor to perform the oil leak nozzle pressure regulation control method as described in any one of claims 5 to 13.

15. A range hood, characterized in that, include: The fan system includes a volute with an oil drain and an impeller rotatably disposed within the volute; and The oil leak nozzle pressure regulating device as described in any one of claims 1 to 4, wherein the oil leak nozzle pressure regulating device is assembled on the volute housing and is used to regulate the pressure loss at the oil leak nozzle.

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