Method for making fan control curve in range hood, control method and related equipment thereof

Abstract

The application discloses a method for making a fan control curve in a range hood, a control method and related equipment thereof. The method comprises the following steps: a minimum noise control curve making step, when back pressure in a working environment of a range hood is greater than or equal to a first preset back pressure and less than or equal to a second preset back pressure, a minimum noise control curve of the range hood working at a minimum noise under the back pressure between the first preset back pressure and the second preset back pressure is made based on a relationship curve between noise generated when the range hood works and a fan rotating parameter; wherein, there is a noise minimum value on the relationship curve, and the minimum noise control curve represents a corresponding relationship between the noise minimum value and the back pressure. When facing the problem of high noise when the range hood works, the application proposes to make the minimum noise control curve, so that the noise when the range hood works is smaller, that is, the noise when the range hood works is reduced.

Description

Technical Field

[0001] This application relates to the field of smoke machine control, and in particular to a method for generating a fan control curve in a smoke machine, a control method, and related equipment. Background Technology

[0002] With the rapid development of range hood technology, range hoods have entered thousands of households.

[0003] Currently, range hoods generally use fans (such as multi-bladed centrifugal fans) as their main design component, operating at their optimal state (zero back pressure) at their design point. However, due to the various installation environments of range hoods, including direct exhaust and connection to public flues, the back pressure (the obstruction of airflow after the fan has supplied energy) fluctuates significantly during actual use, causing the fan's operating point to deviate from its design point. Furthermore, when the operating point deviates significantly from the design point, the airflow environment inside the fan deteriorates considerably, resulting in higher noise levels during operation. Summary of the Invention

[0004] In view of this, this application provides a method for generating a fan control curve in a range hood, a control method, and related equipment, with the aim of reducing the noise of the range hood during operation.

[0005] To achieve the above objectives, this application provides a method for generating control curves for fans in a smoke machine based on noise control, the method comprising:

[0006] The steps for creating the minimum noise control curve are as follows: When the back pressure in the working environment of the range hood is greater than or equal to the first preset back pressure and less than or equal to the second preset back pressure, based on the relationship curve between the noise generated by the range hood during operation and the fan rotation parameters, create the minimum noise control curve for the range hood to operate with minimum noise under the back pressure between the first preset back pressure and the second preset back pressure.

[0007] There is a noise minimum value on the relationship curve, and the minimum noise control curve represents the correspondence between the noise minimum value and the back pressure.

[0008] For example, the method further includes:

[0009] When the back pressure changes, the first change in noise should be less than the first preset change, and the second change in the fan rotation parameters should be less than the second preset change.

[0010] For example, the method further includes:

[0011] The steps for creating a smoke extraction effect control curve are as follows: Based on the first fan rotation parameter in the minimum noise control curve and the second fan rotation parameter corresponding to the user's needs during actual use of the smoke extractor, the target fan rotation parameter is determined, and the smoke extraction effect control curve is created based on the target fan rotation parameter.

[0012] For example, in the step of creating the smoking effect control curve,

[0013] If the rotation parameter of the second fan is less than or equal to the rotation parameter of the first fan, then the rotation parameter of the first fan is determined to be the target fan rotation parameter.

[0014] If the rotation parameter of the second fan is greater than the rotation parameter of the first fan, then the target fan rotation parameter is selected from the parameter range corresponding to the rotation parameters of the first fan and the second fan.

[0015] For example, to achieve the above objectives, this application also provides a fan control method for a range hood based on noise control. The method is applied to a range hood, which is controlled based on a minimum noise control curve. The minimum noise control curve is obtained using the control curve creation method described above. The method includes:

[0016] If the back pressure of the range hood in the working environment is greater than or equal to the first preset back pressure and less than or equal to the second preset back pressure, then the third fan rotation parameter is selected from the minimum noise control curve.

[0017] Based on the rotation parameters of the third fan, a control scheme for the fan installed in the smoke hood is determined, and the fan is controlled based on the control scheme.

[0018] For example, determining the control scheme for the fan installed in the smoke hood based on the rotation parameters of the third fan includes:

[0019] The control scheme is obtained by directly using the rotation parameters of the third fan as the operating parameters of the fan set in the smoke machine.

[0020] For example, determining the control scheme for the fan installed in the smoke hood based on the rotation parameters of the third fan includes:

[0021] Obtain the rotation parameters of the fourth fan corresponding to the user's requirements;

[0022] If the rotation parameter of the fourth fan is greater than the rotation parameter of the third fan, the control scheme is adjusted based on the rotation parameters of the fourth fan and the third fan.

[0023] For example, after obtaining the fourth fan rotation parameters corresponding to the user's requirements, the method further includes:

[0024] If the rotation parameters of the fourth fan are less than or equal to the rotation parameters of the third fan, then there is no need to adjust the control scheme.

[0025] For example, adjusting the control scheme based on the rotation parameters of the fourth fan and the rotation parameters of the third fan includes:

[0026] The rotation parameters of the fifth fan are selected from the parameter ranges corresponding to the rotation parameters of the third fan and the fourth fan.

[0027] The control scheme that controls the fan using the rotation parameters of the third fan is adjusted to a control scheme that controls the fan using the rotation parameters of the fifth fan.

[0028] For example, obtaining the fourth fan rotation parameters corresponding to the user's requirements includes:

[0029] Obtain the current gear position of the range hood;

[0030] Based on the gear position, determine the rotation parameters of the fourth fan corresponding to the user's needs.

[0031] For example, when the back pressure changes, the first change in noise corresponding to the control scheme should be less than the first preset change, and the second change in the fan rotation parameters corresponding to the control scheme should be less than the second preset change.

[0032] For example, before selecting the third fan rotation parameter from the minimum noise control curve, the process includes:

[0033] Obtain the back pressure of the range hood under the working environment;

[0034] If the back pressure is greater than or equal to the first preset back pressure and less than or equal to the second preset back pressure, then the step of selecting the third fan rotation parameter from the minimum noise control curve is executed.

[0035] For example, after obtaining the back pressure of the range hood in the working environment, the method further includes:

[0036] If the back pressure is less than the first preset back pressure, then the rotation parameters of the fourth fan corresponding to the user's needs are obtained, and based on the rotation parameters of the fourth fan, a control scheme for the fan installed in the range hood is determined; or,

[0037] If the back pressure is greater than the second preset back pressure, the sixth fan rotation parameters corresponding to the user's needs are obtained, and based on the sixth fan rotation parameters, the control scheme of the fan installed in the smoke hood is determined.

[0038] For example, determining the control scheme for the fan installed in the smoke hood based on the rotation parameters of the fourth fan includes:

[0039] The control scheme is obtained by directly using the rotation parameters of the fourth fan as the operating parameters of the fan set in the smoke machine.

[0040] For example, determining the control scheme for the fan installed in the smoke hood based on the rotation parameters of the sixth fan includes:

[0041] The control scheme is obtained by directly using the rotation parameters of the sixth fan as the operating parameters of the fan set in the smoke machine.

[0042] For example, this application also provides a control curve generation device for a fan in a noise-controlled smoke hood, the control curve generation device for the fan in a noise-controlled smoke hood comprising:

[0043] The first production module is used to implement the minimum noise control curve production step. Specifically, it is used to produce the minimum noise control curve of the smoke machine when the back pressure in the working environment of the smoke machine is greater than or equal to the first preset back pressure and less than or equal to the second preset back pressure, based on the relationship curve between the noise generated by the smoke machine and the fan rotation parameters.

[0044] There is a noise minimum value on the relationship curve, and the minimum noise control curve represents the correspondence between the noise minimum value and the back pressure.

[0045] For example, to achieve the above objectives, this application also provides a fan control device for a range hood based on noise control. The device is applied to the range hood, which is controlled based on a minimum noise control curve obtained using the aforementioned control curve generation method. The device includes:

[0046] The selected module is used to select a third fan rotation parameter from the minimum noise control curve if the back pressure of the range hood in the working environment is greater than or equal to the first preset back pressure and less than or equal to the second preset back pressure.

[0047] The first determining module is used to determine the control scheme of the fan installed in the smoke hood based on the rotation parameters of the third fan, and to control the fan based on the control scheme.

[0048] For example, to achieve the above objectives, this application also provides a range hood, which includes a memory, a processor, and a noise-controlled fan control program for the range hood stored in the memory and executable on the processor. When the noise-controlled fan control program for the range hood is executed by the processor, it implements the steps of the noise-controlled fan control method for the range hood as described above.

[0049] For example, to achieve the above objectives, this application also provides a terminal, the terminal including a memory, a processor, and a noise-controlled fan control curve generation program stored in the memory and executable on the processor, wherein when the noise-controlled fan control curve generation program is executed by the processor, it implements the steps of the noise-controlled fan control curve generation method described above.

[0050] For example, to achieve the above objectives, this application also provides a computer-readable storage medium storing a noise-controlled fan control curve creation program for a smoke hood fan, wherein when the noise-controlled fan control curve creation program for a smoke hood fan is executed by a processor, it implements the steps of the noise-controlled fan control curve creation method for a smoke hood fan as described above; or the computer-readable storage medium stores a noise-controlled fan control program for a smoke hood fan, wherein when the noise-controlled fan control program for a smoke hood fan is executed by a processor, it implements the steps of the noise-controlled fan control method for a smoke hood fan as described above.

[0051] Compared to existing technologies where the airflow environment inside the fan deteriorates significantly when the operating point deviates far from the design point, leading to higher noise levels during operation, this application, through a minimum noise control curve creation step, establishes a minimum noise control curve for the range hood operating at minimal noise under a back pressure between the first and second preset back pressures, based on the relationship curve between the noise generated by the range hood and the fan rotation parameters, when the back pressure in the range hood's operating environment is greater than or equal to a first preset back pressure and less than or equal to a second preset back pressure. This minimum noise control curve represents the correspondence between the minimum noise value and the back pressure. To address the issue of high noise levels during range hood operation, this application proposes creating a minimum noise control curve, ensuring that when the range hood is controlled using this curve, the noise generated during operation remains at a minimum, thereby reducing the noise level during operation. Attached Figure Description

[0052] Figure 1 This is a flowchart illustrating the first embodiment of the method for generating the control curve of the fan in a smoke machine based on noise control, as described in this application.

[0053] Figure 2 This is a schematic diagram illustrating the correspondence between noise and fan rotation parameters in an embodiment of this application;

[0054] Figure 3 This is a schematic diagram showing the correspondence between the fan rotation parameters corresponding to the user requirements involved in the embodiments of this application and the fan rotation parameters corresponding to the noise minimum point;

[0055] Figure 4 This is a flowchart illustrating the first embodiment of the fan control method for a smoke machine based on noise control in this application;

[0056] Figure 5 This is a flowchart illustrating the second embodiment of the fan control method for a smoke machine based on noise control in this application;

[0057] Figure 6 This is a schematic diagram of the hardware operating environment involved in the embodiments of this application;

[0058] Figure 7 This is another schematic diagram of the hardware operating environment involved in the embodiments of this application.

[0059] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0060] It should be understood that the specific embodiments described herein are merely illustrative of this application and are not intended to limit this application.

[0061] This application provides a method for generating control curves for fans in a smoke machine based on noise control, referring to... Figure 1 , Figure 1 This is a flowchart illustrating the first embodiment of the method for generating the control curve of the fan in a smoke machine based on noise control according to this application.

[0062] This application provides an embodiment of a method for generating control curves for fans in a smoke hood based on noise control. It should be noted that although the logical order is shown in the flowchart, in some cases, the steps shown or described may be performed in a different order. This method for generating control curves for fans in a smoke hood based on noise control can be applied to terminals, including but not limited to personal computers and mobile phones. The method for generating control curves for fans in a smoke hood based on noise control includes:

[0063] Step S110, Minimum Noise Control Curve Creation Step: When the back pressure in the working environment of the range hood is greater than or equal to the first preset back pressure and less than or equal to the second preset back pressure, based on the relationship curve between the noise generated by the range hood during operation and the fan rotation parameters, a minimum noise control curve is created for the range hood to operate with minimum noise under the back pressure between the first preset back pressure and the second preset back pressure.

[0064] Step S120, wherein there is a noise minimum value on the relationship curve, and the minimum noise control curve characterizes the correspondence between the noise minimum value and the back pressure.

[0065] Under a high back pressure (greater than or equal to the first preset back pressure and less than or equal to the second preset back pressure), the noise (or sound quality) of the range hood and the fan rotation parameters exhibit the following characteristics: Figure 2 The relationship shown by curve 301, that is, the corresponding relationship is... Figure 2 Curve 201 in the figure. The fan rotation parameter is the product of air volume (air velocity) and the cross-sectional area of ​​the outlet duct, in meters. 3 / min) or rotational speed (in r / s). For example, the first preset back pressure and the second preset back pressure can be set as needed, and this embodiment does not impose specific limitations. The back pressure of the range hood can be obtained by collecting pressure data from a pressure sensor, or it can be calculated from the parameters of the fan in the range hood during operation.

[0066] Depend on Figure 2 It can be seen that as the air volume or rotation speed increases, the noise or sound quality first decreases and then increases after reaching the minimum point A. It should be noted that the reason for this phenomenon is as follows: Under high back pressure, when the fan speed is low, the energy provided by the fan's rotating blades to the air is insufficient to resist the back pressure, causing some air to be unable to exit the blade passage (the space between the blades) and resulting in backflow. That is, the airflow environment in the blade passage is significantly deteriorated, and the air discharged from the blade passage undergoes large-scale flow separation, thereby blocking the flow channel and generating noise. The most significant phenomenon is the roaring sound of the smoke machine. When the fan speed is high, although the situation of insufficient energy provided by the fan's rotating blades to resist the back pressure is improved, thus improving the airflow environment in the blade passage, the fan itself will also generate noise due to the excessively high impeller speed. Moreover, this noise is exponentially related to the impeller speed, resulting in higher noise levels in the smoke machine. At point A and its vicinity, because the fan's rotating blades provide more energy to the air and the fan speed is not high, this is precisely the point of minimum noise or sound quality, namely the noise minimum point A.

[0067] It should be noted that when the back pressure is high, Figure 2Point A in the diagram changes with the back pressure, and correspondingly, curve 201 also changes accordingly. Specifically, as the back pressure decreases, the airflow or rotation speed corresponding to point A also decreases, and the maximum noise or sound quality value generated by the back pressure also decreases accordingly; as the back pressure increases, the airflow or rotation speed corresponding to point A also increases, and the maximum noise or sound quality value generated by the back pressure also increases accordingly.

[0068] It can be understood that the minimum noise control curve represents the correspondence between the noise minimum point A and the back pressure (under high back pressure). That is, under any high back pressure, the range hood can find the corresponding noise minimum point A from the minimum noise control curve. In other words, using the minimum noise control curve to control the motor can ensure that the range hood can work with the minimum noise under any high back pressure.

[0069] For example, the method further includes:

[0070] When the back pressure changes, the first change in noise should be less than the first preset change, and the second change in the fan rotation parameters should be less than the second preset change.

[0071] It should be noted that range hoods do not operate under ideal conditions with constant back pressure. When a range hood is working, the back pressure may fluctuate over time. This can be due to changes in the air pressure at the outlet of the flue (e.g., wind) or other users' range hoods in the shared flue also starting to emit fumes.

[0072] To ensure that the smoke extraction effect and noise or sound quality of the range hood do not change significantly, regardless of the range hood's operating setting (different settings require different fan rotation parameters), on the range hood's operating curve, except at and near zero back pressure, noise or sound quality should also remain relatively stable when back pressure fluctuations are small. Specifically, it should ensure that... Where (P>P0). Where, This refers to the PQ curve, which reflects the relationship between back pressure and airflow. This refers to the NP curve, which reflects the relationship between loudness (used to characterize the magnitude of noise or sound quality) and back pressure. Preferably, P0 < 50 Pa, k1 < 0.15 m. 3 / min·Pa,k2<0.1sone / Pa or 0.07dB(A) / Pa.

[0073] It should be noted that when the back pressure changes, the fan rotation parameters can be adjusted to adapt to the change in back pressure, thereby ensuring that the smoke extraction effect and noise or sound quality of the range hood do not change significantly. Specifically, changing the fan rotation parameters refers to changing the rotational speed. As airflow is calculated based on rotational speed, a change in rotational speed will correspondingly change the airflow.

[0074] For example, the method further includes:

[0075] The steps for creating a smoke extraction effect control curve are as follows: Based on the first fan rotation parameter in the minimum noise control curve and the second fan rotation parameter corresponding to the user's needs during actual use of the smoke extractor, the target fan rotation parameter is determined, and the smoke extraction effect control curve is created based on the target fan rotation parameter.

[0076] To ensure the smoke extraction effect of the smoke hood, the smoke extraction effect should be considered in addition to the noise level. Therefore, the minimum noise control curve is adjusted by adjusting the rotation parameters of the second fan to obtain the smoke extraction effect control curve.

[0077] The second fan rotation parameter corresponding to the user's needs corresponds to the speed setting of the range hood. For example, the range hood has three speed settings: high, medium, and low. These three speed settings correspond to fan rotation parameter 1, fan rotation parameter 2, and fan rotation parameter 3, respectively. When the user selects the high speed setting, the second fan rotation parameter is fan rotation parameter 1; when the user selects the medium speed setting, the second fan rotation parameter is fan rotation parameter 2; and when the user selects the low speed setting, the second fan rotation parameter is fan rotation parameter 3.

[0078] For example, in the step of creating the smoking effect control curve,

[0079] If the rotation parameter of the second fan is less than or equal to the rotation parameter of the first fan, then the rotation parameter of the first fan is determined to be the target fan rotation parameter.

[0080] If the rotation parameter of the second fan is greater than the rotation parameter of the first fan, then the target fan rotation parameter is selected from the parameter range corresponding to the rotation parameters of the first fan and the second fan.

[0081] Reference Figure 3 , Figure 3 This is a schematic diagram showing the correspondence between the fan rotation parameters corresponding to the user requirements involved in the embodiments of this application and the fan rotation parameters corresponding to the noise minimum point. Wherein, A represents the noise minimum point, and the specific implementation of curve 301 is the same as described above. Figure 2The specific implementation of curve 201 is basically the same, and will not be described again here. Among them, line L is the constant air volume line or constant speed line, and L includes L1 and L2. L1 is the case where the rotational parameter of the second fan is less than the rotational parameter of the first fan, and L2 is the case where the rotational parameter of the second fan is greater than the rotational parameter of the first fan.

[0082] After determining the rotation parameters of the second fan, and combining them with the rotation parameters of the first fan, if the rotation parameters of the second fan are greater than those of the first fan, and the L-line is to the right of point A (L2), then the fan cannot meet the user's needs when rotating with the rotation parameters of the first fan. In this case, a certain level of noise or sound quality should be sacrificed, i.e., the fan rotation parameters should be increased, and the increased fan rotation parameters should be used as the target fan rotation parameters to meet the user's needs.

[0083] If the rotation parameters of the second fan are less than or equal to the rotation parameters of the first fan, then line L is to the left of point A, which is L1. This means that when the fan rotates with the rotation parameters of the first fan, it can meet the user's needs. Therefore, in order to ensure the level of noise or sound quality and to keep the noise at an extremely low level, the rotation parameters of the first fan can be used as the target fan rotation parameters.

[0084] It's understandable that to ensure effective smoke extraction while also maintaining low levels of noise or sound quality, n' ≥ n(P,A), meaning the real-time rotational speed must be greater than or equal to the rotational speed at point A. The extremely low level of noise or sound quality is understood to be at point A. Based on this, if the rotational speed corresponding to effective smoke extraction is less than or equal to the rotational speed at point A, then the target fan's rotational parameters should be set to the rotational speed at point A, since the rotational speed at point A is greater than or equal to the rotational speed required to achieve the desired smoke extraction effect. However, if the rotational speed required to achieve effective smoke extraction is greater than the rotational speed at point A, then the target fan's rotational parameters must be greater than or equal to the rotational speed at point A, and not less. This is because the lower the fan's operating parameters are compared to the rotational speed at point A, the worse the smoke extraction effect and the higher the noise or sound quality.

[0085] Therefore, the target fan rotation parameter should be selected within a range greater than or equal to the first fan rotation parameter, and not within a range less than the first fan rotation parameter. Since the second fan rotation parameter is sufficient to ensure smoke extraction, if the operating parameter is greater than the second fan rotation parameter, noise or sound quality will increase. Therefore, it is best to select the target fan rotation parameter between the first and second fan rotation parameters.

[0086] For example, the closer the target fan rotation parameters are to the second fan rotation parameters, the higher the noise or sound quality level but the better the smoke extraction effect; conversely, the closer the target fan rotation parameters are to the first fan rotation parameters, the lower the noise or sound quality level but the worse the smoke extraction effect. Therefore, a trade-off must be made between noise or sound quality and smoke extraction effect when selecting the target fan rotation parameters.

[0087] In addition, the range hood may also be under low back pressure (less than the first preset back pressure) or extremely high back pressure (greater than the second preset back pressure).

[0088] Under low back pressure, since it is close to the point of maximum airflow, the fumes discharged by the range hood are basically unobstructed. Under these conditions, the airflow environment in the blade channel is better due to the smaller obstruction, and there is little or no noise generated by the backflow of air in the blade channel. In other words, under low back pressure, the noise of the range hood mainly comes from the rotation of the fan, and the noise or sound quality increases with the increase of the fan rotation parameters.

[0089] Under extremely high back pressure, approaching the maximum static pressure point (meaning the range hood is close to being unable to expel fumes), the noise from the range hood is understandably generated by the combined effects of air recirculation within the blade duct and fan rotation. The noise, or sound quality, continuously increases and does not decrease at lower fan speeds; instead, it increases with increasing speed. Furthermore, only by increasing the fan's rotation parameters to ensure the rotating blades provide sufficient energy to the air to counteract the back pressure can the range hood effectively expel fumes.

[0090] It is understandable that under extremely high or low back pressure, the relationship curve between the noise generated by the range hood during operation and the fan rotation parameters will not show the noise minimum point A as under high back pressure. In this case, the target fan rotation parameters are determined by the user's needs. For example, the range hood may have three speed settings: high, medium, and low. These three speed settings correspond to fan rotation parameters 1, 2, and 3, respectively. When the user selects high speed, the target fan rotation parameter is fan rotation parameter 1; when the user selects medium speed, the target fan rotation parameter is fan rotation parameter 2; and when the user selects low speed, the target fan rotation parameter is fan rotation parameter 3.

[0091] Compared to existing technologies where the airflow environment inside the fan deteriorates significantly when the operating point deviates far from the design point, leading to higher noise levels during operation, this application, through a minimum noise control curve creation step, establishes a minimum noise control curve for the range hood operating at minimal noise under a back pressure between the first and second preset back pressures, based on the relationship curve between the noise generated by the range hood and the fan rotation parameters, when the back pressure in the range hood's operating environment is greater than or equal to a first preset back pressure and less than or equal to a second preset back pressure. This minimum noise control curve represents the correspondence between the minimum noise value and the back pressure. To address the issue of high noise levels during range hood operation, this application proposes creating a minimum noise control curve, ensuring that when the range hood is controlled using this curve, the noise generated during operation remains at a minimum, thereby reducing the noise level during operation.

[0092] This application provides a fan control method for a smoke machine based on noise control, referring to... Figure 4 , Figure 4 This is a flowchart illustrating the first embodiment of the fan control method for a smoke machine based on noise control according to this application.

[0093] This application provides an embodiment of a noise-controlled fan control method for a range hood. It should be noted that although the logical order is shown in the flowchart, in some cases, the steps shown or described may be performed in a different order. This noise-controlled fan control method for a range hood can be applied to a range hood, which is controlled based on a minimum noise control curve. This minimum noise control curve is obtained using the first embodiment of the noise-controlled fan control curve generation method described above. The noise-controlled fan control method for a range hood includes:

[0094] Step S410: If the back pressure of the smoke hood in the working environment is greater than or equal to the first preset back pressure and less than or equal to the second preset back pressure, then the third fan rotation parameter is selected from the minimum noise control curve.

[0095] Under a high back pressure (greater than or equal to the first preset back pressure and less than or equal to the second preset back pressure), the noise (or sound quality) of the range hood and the fan rotation parameters exhibit the following characteristics: Figure 2 The relationship shown by curve 201, that is, the corresponding relationship is... Figure 2 Curve 201 in the figure. The fan rotation parameter is the product of air volume (air velocity) and the cross-sectional area of ​​the outlet duct, in meters. 3 ( / min) or rotational speed (in r / s). For example, the first preset back pressure and the second preset back pressure can be set as needed, and this embodiment does not impose specific limitations.

[0096] Depend on Figure 2 It can be seen that as the air volume or rotation speed increases, the noise or sound quality first decreases and then increases after reaching the minimum point A. It should be noted that the reason for this phenomenon is as follows: Under high back pressure, when the fan speed is low, the energy provided by the fan's rotating blades to the air is insufficient to resist the back pressure, causing some air to be unable to exit the blade passage (the space between the blades) and resulting in backflow. That is, the airflow environment in the blade passage is significantly deteriorated, and the air discharged from the blade passage undergoes large-scale flow separation, thereby blocking the flow channel and generating noise. The most significant phenomenon is the roaring sound of the smoke machine. When the fan speed is high, although the situation of insufficient energy provided by the fan's rotating blades to resist the back pressure is improved, thus improving the airflow environment in the blade passage, the fan itself will also generate noise due to the excessively high impeller speed. Moreover, this noise is exponentially related to the impeller speed, resulting in higher noise levels in the smoke machine. At point A and its vicinity, because the fan's rotating blades provide more energy to the air and the fan speed is not high, this is precisely the point of minimum noise or sound quality, namely the noise minimum point A.

[0097] It should be noted that when the back pressure is high, Figure 2 Point A in the diagram changes with the back pressure, and correspondingly, curve 201 also changes accordingly. Specifically, as the back pressure decreases, the airflow or rotation speed corresponding to point A also decreases, and the maximum noise or sound quality value generated by the back pressure also decreases accordingly; as the back pressure increases, the airflow or rotation speed corresponding to point A also increases, and the maximum noise or sound quality value generated by the back pressure also increases accordingly.

[0098] Step S420: Based on the rotation parameters of the third fan, determine the control scheme of the fan installed in the smoke hood, and control the fan based on the control scheme.

[0099] Assuming the fan speed or airflow is controlled based on noise or sound quality, curve 201 shows that point A and its vicinity exhibit relatively low noise or sound quality. Therefore, the fan control scheme can be determined as follows: either control the fan's rotation using the rotation parameters corresponding to the third fan at point A, or control the fan's rotation using the rotation parameters corresponding to points near point A. In essence, the control scheme is a method for controlling the fan to rotate with specific operating parameters, where the fan rotation parameters are the fan's operating parameters.

[0100] For example, the operating parameters can be controlled between 110% and 95% of the rotation parameters of the third fan. Preferably, they are controlled between 105% and 100% of the rotation parameters of the third fan.

[0101] For example, determining the control scheme for the fan installed in the smoke hood based on the rotation parameters of the third fan includes:

[0102] Step a: The rotation parameters of the third fan are directly used as the operating parameters of the fan set in the smoke hood to obtain the control scheme.

[0103] It is understandable that at point A, the noise or sound quality is at its minimum. Therefore, controlling the fan to rotate by the third fan rotation parameters corresponding to point A will result in the best experience in terms of noise or sound quality.

[0104] For example, when the back pressure changes, the first change in noise should be less than a first preset change, and the second change in the fan rotation parameters should be less than a second preset change.

[0105] Range hoods do not operate under ideal conditions with constant back pressure. When a range hood is working, the back pressure may fluctuate over time. This can be caused by changes in air pressure at the outlet of the flue (e.g., due to wind) or other users in the shared flue also starting to exhaust fumes.

[0106] To ensure that the smoke extraction effect and noise or sound quality of the range hood do not change significantly, regardless of the range hood's operating setting (different settings require different fan rotation parameters), on the range hood's operating curve, except at and near zero back pressure, noise or sound quality should also remain relatively stable when back pressure fluctuations are small. Specifically, it should ensure that... Where (P>P0). Where, This refers to the PQ curve, which reflects the relationship between back pressure and airflow. This refers to the NP curve, which reflects the relationship between loudness (used to characterize the magnitude of noise or sound quality) and back pressure. Preferably, P0 < 50 Pa, k1 < 0.15 m. 3 / min·Pa,k2<0.1sone / Pa or 0.07dB(A) / Pa.

[0107] It should be noted that when the back pressure changes, the fan rotation parameters can be adjusted to adapt to the change in back pressure, thereby ensuring that the smoke extraction effect and noise or sound quality of the range hood do not change significantly. Specifically, changing the fan rotation parameters refers to changing the rotational speed. As airflow is calculated based on rotational speed, a change in rotational speed will correspondingly change the airflow.

[0108] For example, before selecting the third fan rotation parameter from the minimum noise control curve, the process includes:

[0109] Step b: Obtain the back pressure of the range hood under working conditions;

[0110] Step c: If the back pressure is greater than or equal to the first preset back pressure and less than or equal to the second preset back pressure, then the step of selecting the third fan rotation parameter from the minimum noise control curve is executed.

[0111] The back pressure of the range hood can be obtained by collecting pressure data or by calculating the parameters of the fan during operation. Point A only exists in curve 201 corresponding to high back pressure. For low back pressure (back pressure less than the first preset back pressure) or extremely high back pressure (back pressure greater than the second preset back pressure), point A does not exist.

[0112] Specifically, after obtaining the back pressure of the range hood in the working environment, the process further includes:

[0113] Step d: If the back pressure is less than the first preset back pressure, then obtain the rotation parameters of the fourth fan corresponding to the user's needs, and based on the rotation parameters of the fourth fan, determine the control scheme for the fan installed in the range hood; or,

[0114] If the back pressure is greater than the second preset back pressure, the sixth fan rotation parameters corresponding to the user's needs are obtained, and based on the sixth fan rotation parameters, the control scheme of the fan installed in the smoke hood is determined.

[0115] Under low back pressure, since it is close to the point of maximum airflow, the fumes discharged by the range hood are basically unobstructed. Understandably, due to the small obstruction, the airflow environment in the blade passage is better, and there will be no noise generated by the backflow of air in the blade passage. That is, under low back pressure, the noise of the range hood mainly comes from the rotation of the fan, and the noise or sound quality increases with the increase of the fan rotation parameters.

[0116] Under extremely high back pressure, approaching the maximum static pressure point (meaning the range hood is almost unable to expel fumes), the noise of the range hood is understandably generated by the combined effects of air recirculation within the blade duct and fan rotation. The noise, or sound quality, continuously increases and does not decrease at lower fan speeds; instead, it increases with increasing speed. Furthermore, only by increasing the fan rotation parameters to ensure the rotating blades provide sufficient energy to the air to counteract the back pressure can the range hood effectively expel fumes. Therefore, the sixth fan rotation parameter is the one that meets the user's fume extraction needs.

[0117] Under normal conditions, whether the back pressure is extremely high or low, the rotation parameters of the fourth and sixth fans of the range hood are determined by the user's requirements. For example, the range hood may have three speed settings: high, medium, and low. These three speed settings correspond to fan rotation parameters 1, 2, and 3, respectively. When the user selects the high speed setting, the fourth or sixth fan rotation parameter is fan rotation parameter 1, and the corresponding control scheme is for the range hood to control the fan to operate at fan rotation parameter 1. When the user selects the medium speed setting, the fourth or sixth fan rotation parameter is fan rotation parameter 2, and the corresponding control scheme is for the range hood to control the fan to operate at fan rotation parameter 2. When the user selects the low speed setting, the fourth or sixth fan rotation parameter is fan rotation parameter 3, and the corresponding control scheme is for the range hood to control the fan to operate at fan rotation parameter 3.

[0118] Similar to determining the control scheme of a fan by using the rotation parameters of the third fan corresponding to point A, the control scheme by using the rotation parameters of the fourth fan, and the control scheme by using the rotation parameters of the sixth fan, the operating parameters of the corresponding fans can also fluctuate within a certain range.

[0119] For example, the operating parameter for the fourth fan rotation can be controlled between 110% and 95% of the fourth fan rotation parameter. Preferably, it is controlled between 105% and 100% of the fourth fan rotation parameter.

[0120] For example, determining the control scheme for the fan installed in the smoke hood based on the rotation parameters of the fourth fan includes:

[0121] Step d1: The rotation parameters of the fourth fan are directly used as the operating parameters of the fan set in the smoke hood to obtain the control scheme.

[0122] It is understandable that the smoke extraction effect is best when the operating parameters are the rotation parameters of the fourth fan. Therefore, controlling the fan rotation by the rotation parameters of the fourth fan can achieve the best smoke extraction effect.

[0123] For example, the operating parameter for the sixth fan rotation can be controlled between 110% and 95% of the sixth fan rotation parameter. Preferably, it is controlled between 105% and 100% of the sixth fan rotation parameter.

[0124] For example, determining the control scheme for the fan installed in the smoke hood based on the rotation parameters of the sixth fan includes:

[0125] Step d2: The rotation parameters of the sixth fan are directly used as the operating parameters of the fan set in the smoke machine to obtain the control scheme.

[0126] It is understandable that when the operating parameters of the fan are set to the sixth fan rotation parameter, the smoke hood can meet the user's needs for smoke extraction. If the sixth fan rotation parameter is increased, the noise or sound quality level will increase; if the sixth fan rotation parameter is decreased, the smoke extraction effect will be poor.

[0127] It should be noted that under low back pressure, in order to ensure that the air volume of the range hood reaches the nominal air volume required by the national standard, even if the range hood can easily reach the air volume required by the user, the air volume still needs to be set to the nominal air volume when the air volume required by the user is less than the nominal air volume.

[0128] Compared to existing technologies where the airflow environment inside the fan deteriorates significantly when the operating point deviates far from the design point, leading to higher noise levels during operation, this application addresses this issue by selecting a third fan rotation parameter from the minimum noise control curve if the back pressure of the smoke hood in the operating environment is greater than or equal to a first preset back pressure and less than or equal to a second preset back pressure. Based on this third fan rotation parameter, a control scheme for the fan installed in the smoke hood is determined, and the fan is controlled according to this control scheme. To address the problem of high noise levels during smoke hood operation, this application first obtains the correspondence between noise at the given back pressure and the fan rotation parameter. Based on this correspondence, the fan rotation parameter that minimizes noise during smoke hood operation is determined. This fan rotation parameter is then used to determine the control scheme for the fan, allowing it to operate under this scheme, thereby reducing noise levels during smoke hood operation.

[0129] Reference Figure 5 , Figure 5 This is a flowchart illustrating a second embodiment of the noise control-based fan control method for a range hood according to this application. Based on the first embodiment of the noise control-based fan control method for a range hood according to this application, a second embodiment is proposed, wherein determining the control scheme for the fan installed in the range hood based on the rotation parameters of the third fan includes:

[0130] Step S510: Obtain the rotation parameters of the fourth fan corresponding to the user's requirements;

[0131] For example, obtaining the fourth fan rotation parameters corresponding to the user's requirements includes:

[0132] Step e: Obtain the current gear position of the range hood;

[0133] Step f: Based on the gear position, determine the rotation parameters of the fourth fan corresponding to the user's needs.

[0134] User demand is determined by the current gear position of the range hood, that is, by the gear position selected by the user. The specific implementation of the gear position and the corresponding fourth fan rotation parameters is basically the same as the specific implementation of the gear position and the corresponding fourth fan rotation parameters in the first embodiment above, and will not be repeated here.

[0135] Step S520: If the rotation parameter of the fourth fan is greater than the rotation parameter of the third fan, then the control scheme is adjusted based on the rotation parameters of the fourth fan and the third fan.

[0136] Reference Figure 3 Where A is the noise minimum point, the specific implementation of curve 301 is basically the same as the specific implementation of curve 201 in the first embodiment above, and will not be repeated here. Wherein, line L is the constant air volume line or constant speed line, L includes L1 and L2, L1 is the case where the rotation parameter of the fourth fan is less than the rotation parameter of the third fan, and L2 is the case where the rotation parameter of the fourth fan is greater than the rotation parameter of the third fan.

[0137] After determining the rotation parameters of the fourth fan, and combining them with the rotation parameters of the third fan in the first embodiment above, if the rotation parameters of the fourth fan are greater than those of the third fan, and the L-line is to the right of point A, which is L2, then the fan cannot meet the user's needs when it rotates with the rotation parameters of the third fan. In this case, a certain level of noise or sound quality should be sacrificed, that is, the fan rotation parameters should be increased, and the smoke hood control fan should rotate with the increased fan rotation parameters to meet the user's needs.

[0138] For example, after obtaining the fourth fan rotation parameters corresponding to the user's requirements, the method further includes:

[0139] Step g: If the rotation parameters of the fourth fan are less than or equal to the rotation parameters of the third fan, then there is no need to adjust the control scheme.

[0140] If the rotation parameters of the fourth fan are less than or equal to those of the third fan, and line L is to the left of point A (L1), it means that the fan can meet the user's needs when rotating with the rotation parameters of the third fan. Therefore, in order to ensure the level of noise or sound quality and keep the noise at an extremely low level, there is no need to adjust the control scheme. That is, the smoke hood control fan continues to rotate with the rotation parameters of the third fan.

[0141] For example, adjusting the control scheme based on the rotation parameters of the fourth fan and the rotation parameters of the third fan includes:

[0142] Step h: Select the rotation parameters of the fifth fan from the parameter range corresponding to the rotation parameters of the third fan and the fourth fan.

[0143] It's understandable that, while ensuring effective smoke extraction, a low level of noise or sound quality is also required. This necessitates ensuring n' ≥ n(P,A), meaning the real-time rotational speed must be greater than or equal to the rotational speed at point A. The extremely low level of noise or sound quality is understood to be at point A. Based on this, if the rotational speed corresponding to effective smoke extraction is less than or equal to the rotational speed at point A, then the operating parameters should be set to the rotational speed at point A, since the rotational speed at point A is greater than or equal to the rotational speed required to achieve the desired smoke extraction effect. However, if the rotational speed required to achieve the desired smoke extraction effect is greater than the rotational speed at point A, then the operating parameters should be greater than or equal to the rotational speed at point A, and not less. A lower operating parameter than the rotational speed at point A will result in poorer smoke extraction and increased noise or sound quality.

[0144] Therefore, the rotation parameters of the fifth fan should be selected within a range greater than or equal to those of the third fan, and not within a range less than those of the third fan. Since the rotation parameters of the fourth fan are sufficient to ensure effective smoke extraction, if the operating parameters are greater than those of the fourth fan, noise or sound quality will increase. Therefore, it is best to select the rotation parameters of the fifth fan between those of the third and fourth fan.

[0145] For example, the closer the rotation parameters of the fifth fan are to those of the fourth fan, the higher the noise or sound quality level but the better the smoke extraction effect; conversely, the closer the rotation parameters of the fifth fan are to those of the third fan, the lower the noise or sound quality level but the worse the smoke extraction effect. Therefore, a trade-off must be made between noise or sound quality and smoke extraction effect when selecting the rotation parameters of the fifth fan. This trade-off can be preset by the system or set by the user; this embodiment does not impose specific limitations.

[0146] Step i: The control scheme that controls the fan with the rotation parameters of the third fan is adjusted to the control scheme that controls the fan with the rotation parameters of the fifth fan.

[0147] After adjusting the control scheme, the smoke hood controls the fan through the new control scheme so that the fan rotates with the fifth fan rotation parameters.

[0148] In this embodiment, when determining the control scheme of the fan, the smoke extraction effect is also considered in addition to the noise or sound quality level, thereby meeting the user's needs for noise level and smoke extraction effect, and thus improving the user's experience when using the smoke extractor.

[0149] For example, this application also provides a control curve generation device for a fan in a noise-controlled smoke hood, the control curve generation device for the fan in a noise-controlled smoke hood comprising:

[0150] The first production module is used to implement the minimum noise control curve production step. Specifically, it is used to produce the minimum noise control curve of the smoke machine when the back pressure in the working environment of the smoke machine is greater than or equal to the first preset back pressure and less than or equal to the second preset back pressure, based on the relationship curve between the noise generated by the smoke machine and the fan rotation parameters.

[0151] There is a noise minimum value on the relationship curve, and the minimum noise control curve represents the correspondence between the noise minimum value and the back pressure.

[0152] For example, when the back pressure changes, the first change in noise should be less than a first preset change, and the second change in the fan rotation parameters should be less than a second preset change.

[0153] For example, the device for generating the control curve of the fan in the noise-controlled smoke machine further includes:

[0154] The second production module is used to implement the smoking effect control curve production step. Specifically, it is used to determine the target fan rotation parameters based on the first fan rotation parameters in the minimum noise control curve and the second fan rotation parameters corresponding to the user's needs during actual use of the smoke machine, and to produce the smoking effect control curve based on the target fan rotation parameters.

[0155] For example, the second production module includes:

[0156] The determining unit is configured to determine the first fan rotation parameter as the target fan rotation parameter if the second fan rotation parameter is less than or equal to the first fan rotation parameter;

[0157] The selection unit is used to select a target fan rotation parameter from the parameter range corresponding to the first fan rotation parameter and the second fan rotation parameter if the second fan rotation parameter is greater than the first fan rotation parameter.

[0158] The specific implementation of the control curve generation device for the fan in a smoke machine based on noise control in this application is basically the same as the embodiments of the control curve generation method for the fan in a smoke machine based on noise control described above, and will not be repeated here.

[0159] For example, this application also provides a noise-controlled fan control device for a range hood, which is applied to a range hood. The range hood is controlled based on a minimum noise control curve, which is obtained using the control curve generation method described above. The noise-controlled fan control device for the range hood includes:

[0160] The selected module is used to select a third fan rotation parameter from the minimum noise control curve if the back pressure of the range hood in the working environment is greater than or equal to the first preset back pressure and less than or equal to the second preset back pressure.

[0161] The first determining module is used to determine the control scheme of the fan installed in the smoke hood based on the rotation parameters of the third fan, and to control the fan based on the control scheme.

[0162] For example, the first determining module includes:

[0163] The first determining unit is used to directly use the rotation parameters of the third fan as the operating parameters of the fan set in the smoke machine to obtain a control scheme.

[0164] For example, the first determining module includes:

[0165] The acquisition unit is used to acquire the rotation parameters of the fourth fan corresponding to the user's requirements;

[0166] The adjustment unit is used to adjust the control scheme based on the rotation parameters of the fourth fan and the third fan if the rotation parameter of the fourth fan is greater than the rotation parameter of the third fan; if the rotation parameter of the fourth fan is less than or equal to the rotation parameter of the third fan, the control scheme does not need to be adjusted.

[0167] For example, the adjustment unit includes:

[0168] A sub-unit is selected to select the rotation parameters of the fifth fan from the parameter ranges corresponding to the rotation parameters of the third fan and the fourth fan.

[0169] The subunit is adjusted so that the control scheme that controls the fan with the rotation parameters of the third fan is changed to the control scheme that controls the fan with the rotation parameters of the fifth fan.

[0170] For example, the acquisition unit includes:

[0171] The acquisition subunit is used to acquire the current gear position of the range hood;

[0172] The determination subunit is used to determine the fourth fan rotation parameters corresponding to the user's requirements based on the gear position.

[0173] For example, when the back pressure changes, the first change in noise should be less than a first preset change, and the second change in the fan rotation parameters should be less than a second preset change.

[0174] For example, the fan control device in the noise-controlled smoke hood further includes:

[0175] The acquisition module is used to acquire the back pressure of the range hood in the working environment; if the back pressure is greater than or equal to the first preset back pressure and less than or equal to the second preset back pressure, then the step of selecting the third fan rotation parameter from the minimum noise control curve is executed.

[0176] For example, the fan control device in the noise-controlled smoke hood further includes:

[0177] The second determining module is used to, if the back pressure is less than the first preset back pressure, obtain the rotation parameters of the fourth fan corresponding to the user's requirements, and determine the control scheme of the fan installed in the range hood based on the rotation parameters of the fourth fan; or,

[0178] The third determining module is used to obtain the sixth fan rotation parameters corresponding to the user's needs if the back pressure is greater than the second preset back pressure, and determine the control scheme of the fan set in the smoke hood based on the sixth fan rotation parameters.

[0179] For example, the second determining module includes:

[0180] The second determining unit is used to directly use the rotation parameters of the fourth fan as the operating parameters of the fan set in the smoke fan to obtain a control scheme.

[0181] For example, the third determining module includes:

[0182] The third determining unit is used to directly use the rotation parameters of the sixth fan as the operating parameters of the fan set in the smoke fan to obtain a control scheme.

[0183] The specific implementation of the noise control-based fan control device for a smoke machine in this application is basically the same as the embodiments of the noise control-based fan control method for a smoke machine described above, and will not be repeated here.

[0184] In addition, this application also provides a terminal. For example... Figure 6 As shown, Figure 6 This is a schematic diagram of the hardware operating environment involved in the embodiments of this application.

[0185] For example, Figure 6 This can be a structural diagram of the hardware operating environment of the range hood.

[0186] like Figure 6 As shown, the smoke hood may include a processor 601, a communication interface 602, a memory 603, and a communication bus 604. The processor 601, the communication interface 602, and the memory 603 communicate with each other through the communication bus 604. The memory 603 is used to store computer programs. When the processor 601 executes the program stored in the memory 603, it implements the steps of the method for creating a control curve for the fan in the smoke hood based on noise control.

[0187] The communication bus 604 mentioned in the above-mentioned smoke machine can be a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus, etc. This communication bus 604 can be divided into an address bus, a data bus, and a control bus, etc. For ease of illustration, it is represented by only one thick line in the figure, but this does not indicate that there is only one bus or one type of bus.

[0188] Communication interface 602 is used for communication between the above-mentioned smoke machine and other devices.

[0189] The memory 603 may include random access memory (RMD) or non-volatile memory (NM), such as at least one disk storage device. Optionally, the memory 603 may also be at least one storage device located remotely from the aforementioned processor 601.

[0190] The processor 601 mentioned above can be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc.; it can also be a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components.

[0191] The specific implementation method of the smoke machine in this application is basically the same as the above-mentioned embodiments of the method for generating the control curve of the fan in the smoke machine based on noise control, and will not be repeated here.

[0192] In addition, this application also provides a range hood. For example... Figure 7 As shown, Figure 7 This is another schematic diagram of the hardware operating environment involved in the embodiments of this application.

[0193] For example, Figure 7 This can be a structural diagram of the hardware operating environment of the range hood.

[0194] like Figure 7 As shown, the smoke hood may include a processor 701, a communication interface 702, a memory 703, and a communication bus 704. The processor 701, the communication interface 702, and the memory 703 communicate with each other through the communication bus 704. The memory 703 is used to store computer programs. When the processor 701 executes the program stored in the memory 703, it implements the steps of the fan control method in the smoke hood based on noise control.

[0195] The communication bus 704 mentioned in the above-mentioned smoke machine can be a Peripheral Component Interconnect (PCI) bus or an Extended Industry Standard Architecture (EISA) bus, etc. This communication bus 704 can be divided into an address bus, a data bus, and a control bus, etc. For ease of illustration, it is represented by only one thick line in the figure, but this does not indicate that there is only one bus or one type of bus.

[0196] Communication interface 702 is used for communication between the above-mentioned smoke machine and other devices.

[0197] The memory 703 may include random access memory (RMD) or non-volatile memory (NM), such as at least one disk storage device. Optionally, the memory 703 may also be at least one storage device located remotely from the aforementioned processor 701.

[0198] The processor 701 mentioned above can be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc.; it can also be a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components.

[0199] The specific implementation method of the smoke machine in this application is basically the same as the various embodiments of the fan control method in the smoke machine based on noise control described above, and will not be repeated here.

[0200] Furthermore, embodiments of this application also propose a computer-readable storage medium storing a noise-controlled fan control curve creation program. When executed by a processor, the noise-controlled fan control curve creation program implements the steps of the noise-controlled fan control curve creation method described above. Alternatively, the computer-readable storage medium stores a noise-controlled fan control program, which, when executed by a processor, implements the steps of the noise-controlled fan control method described above.

[0201] The specific implementation of the computer-readable storage medium in this application is basically the same as the embodiments of the above-described noise-controlled fan control method for a smoke machine or the embodiments of the above-described noise-controlled fan control curve generation method for a smoke machine, and will not be repeated here.

[0202] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0203] The sequence numbers of the embodiments in this application are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0204] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) and includes several instructions to cause a terminal device (which may be a mobile phone, computer, server, device, or network device, etc.) to execute the methods described in the various embodiments of this application.

[0205] The above are merely preferred embodiments of this application and do not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A method for generating control curves for fans in a smoke machine based on noise control, characterized in that, The method includes: The steps for creating the minimum noise control curve are as follows: When the back pressure in the working environment of the range hood is greater than or equal to the first preset back pressure and less than or equal to the second preset back pressure, based on the relationship curve between the noise generated by the range hood during operation and the fan rotation parameters, create the minimum noise control curve for the range hood to operate with minimum noise under the back pressure between the first preset back pressure and the second preset back pressure. Among them, there is a noise minimum value on the relationship curve, and the minimum noise control curve characterizes the correspondence between the noise minimum value and the back pressure; The steps for creating a smoke extraction effect control curve are as follows: Based on the first fan rotation parameter in the minimum noise control curve and the second fan rotation parameter corresponding to the user's needs during actual use of the smoke extraction machine, the target fan rotation parameter is determined, and the smoke extraction effect control curve is created based on the target fan rotation parameter. In the step of creating the smoking effect control curve, If the rotation parameter of the second fan is less than or equal to the rotation parameter of the first fan, then the rotation parameter of the first fan is determined to be the target fan rotation parameter. If the rotation parameter of the second fan is greater than the rotation parameter of the first fan, then the target fan rotation parameter is selected from the parameter range corresponding to the rotation parameters of the first fan and the second fan.

2. The method as described in claim 1, characterized in that, The method further includes: When the back pressure changes, the first change in noise should be less than the first preset change, and the second change in the fan rotation parameters should be less than the second preset change.

3. A fan control method for a smoke machine based on noise control, characterized in that, The method is applied to a range hood, which is controlled based on a minimum noise control curve. The minimum noise control curve is obtained using the control curve generation method described in any one of claims 1-2, and the method includes: If the back pressure of the range hood in the working environment is greater than or equal to the first preset back pressure and less than or equal to the second preset back pressure, then the third fan rotation parameter is selected from the minimum noise control curve. Based on the rotation parameters of the third fan, a control scheme for the fan installed in the smoke hood is determined, and the fan is controlled based on the control scheme.

4. The method as described in claim 3, characterized in that, The step of determining the control scheme for the fan installed in the smoke hood based on the rotation parameters of the third fan includes: The control scheme is obtained by directly using the rotation parameters of the third fan as the operating parameters of the fan set in the smoke machine.

5. The method as described in claim 3, characterized in that, The step of determining the control scheme for the fan installed in the smoke hood based on the rotation parameters of the third fan includes: Obtain the rotation parameters of the fourth fan corresponding to the user's requirements; If the rotation parameter of the fourth fan is greater than the rotation parameter of the third fan, the control scheme is adjusted based on the rotation parameters of the fourth fan and the third fan.

6. The method as described in claim 5, characterized in that, After obtaining the fourth fan rotation parameters corresponding to the user's requirements, the process also includes: If the rotation parameters of the fourth fan are less than or equal to the rotation parameters of the third fan, then there is no need to adjust the control scheme.

7. The method as described in claim 5, characterized in that, The adjustment of the control scheme based on the rotation parameters of the fourth fan and the rotation parameters of the third fan includes: The rotation parameters of the fifth fan are selected from the parameter ranges corresponding to the rotation parameters of the third fan and the fourth fan. The control scheme that controls the fan using the rotation parameters of the third fan is adjusted to a control scheme that controls the fan using the rotation parameters of the fifth fan.

8. The method as described in claim 5, characterized in that, The acquisition of the fourth fan rotation parameters corresponding to the user's requirements includes: Obtain the current gear position of the range hood; Based on the gear position, determine the rotation parameters of the fourth fan corresponding to the user's needs.

9. The method as described in claim 3, characterized in that, When the back pressure changes, the first change in noise corresponding to the control scheme should be less than the first preset change, and the second change in the fan rotation parameters corresponding to the control scheme should be less than the second preset change.

10. The method as described in claim 9, characterized in that, Before selecting the third fan rotation parameter from the minimum noise control curve, the following steps are included: Obtain the back pressure of the range hood under the working environment; If the back pressure is greater than or equal to the first preset back pressure and less than or equal to the second preset back pressure, then the step of selecting the third fan rotation parameter from the minimum noise control curve is executed.

11. The method as described in claim 10, characterized in that, After obtaining the back pressure of the range hood under the working environment, the method further includes: If the back pressure is less than the first preset back pressure, then the rotation parameters of the fourth fan corresponding to the user's needs are obtained, and based on the rotation parameters of the fourth fan, a control scheme for the fan installed in the range hood is determined; or, If the back pressure is greater than the second preset back pressure, the sixth fan rotation parameters corresponding to the user's needs are obtained, and based on the sixth fan rotation parameters, the control scheme of the fan installed in the smoke hood is determined.

12. The method as described in claim 11, characterized in that, The step of determining the control scheme for the fan installed in the smoke hood based on the rotation parameters of the fourth fan includes: The control scheme is obtained by directly using the rotation parameters of the fourth fan as the operating parameters of the fan set in the smoke machine.

13. The method as described in claim 11, characterized in that, The step of determining the control scheme for the fan installed in the smoke hood based on the rotation parameters of the sixth fan includes: The control scheme is obtained by directly using the rotation parameters of the sixth fan as the operating parameters of the fan set in the smoke machine.

14. A fan control device for a smoke machine based on noise control, characterized in that, The device is applied to a range hood, which is controlled based on a minimum noise control curve. The minimum noise control curve is obtained using the control curve generation method described in claim 1. The device comprises: The selected module is used to select a third fan rotation parameter from the minimum noise control curve if the back pressure of the range hood in the working environment is greater than or equal to the first preset back pressure and less than or equal to the second preset back pressure. The first determining module is used to determine the control scheme of the fan installed in the smoke hood based on the rotation parameters of the third fan, and to control the fan based on the control scheme; The second production module is used to implement the smoking effect control curve production step. Specifically, it is used to determine the target fan rotation parameters based on the first fan rotation parameters in the minimum noise control curve and the second fan rotation parameters corresponding to the user's needs during actual use of the smoke machine, and to produce the smoking effect control curve based on the target fan rotation parameters. The second manufacturing module includes: a determining unit, configured to determine the first fan rotation parameter as the target fan rotation parameter if the second fan rotation parameter is less than or equal to the first fan rotation parameter; and a selecting unit, configured to select the target fan rotation parameter from the parameter range corresponding to the first fan rotation parameter and the second fan rotation parameter if the second fan rotation parameter is greater than the first fan rotation parameter.

15. A range hood, characterized in that, The smoke hood includes a memory, a processor, and a noise-controlled fan control program for the smoke hood stored in the memory and executable on the processor. When the noise-controlled fan control program for the smoke hood is executed by the processor, it implements the steps of the noise-controlled fan control method for the smoke hood as described in any one of claims 3 to 13.

16. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a control curve creation program for a noise-controlled fan in a smoke hood. When the noise-controlled fan control curve creation program is executed by a processor, it implements the steps of the noise-controlled fan control curve creation method for a smoke hood as described in any one of claims 1 to 2. Alternatively, the computer-readable storage medium stores a noise-controlled fan control program for a smoke hood. When the noise-controlled fan control program is executed by a processor, it implements the steps of the noise-controlled fan control method for a smoke hood as described in any one of claims 3 to 13.

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