Range hood control method and range hood

Abstract

The invention provides an extractor hood control method and an extractor hood. The range hood control method comprises the following steps: determining an actual resistance coefficient according to the actual rotating speed of a fan and a reference parameter value; determining a corrected parameter value according to the actual resistance coefficient and the reference parameter value, wherein the corrected parameter value is corrected air volume or corrected noise; under the condition that the corrected parameter value is the corrected air volume and the corrected air volume is not larger than the reference air volume of the reference parameter value, a first target rotating speed is determined according to the corrected air volume and the actual rotating speed of the fan, and the fan is controlled to work at the first target rotating speed; and when the corrected parameter value is corrected noise and the corrected noise is smaller than the first preset noise, a second target rotating speed is determined according to the corrected noise and the actual rotating speed of the fan, and the fan is controlled to work at the second target rotating speed. In this way, the range hood can be suitable for different use scenes and use environments, and the smoke suction effect of the range hood and the use experience of a user are effectively guaranteed.

Description

Technical Field

[0001] This invention relates to the technical field of range hood control, specifically to a range hood control method and a range hood. Background Technology

[0002] Range hoods have become an indispensable household appliance in people's daily lives.

[0003] Currently, the performance control technology of range hoods is mainly based on fixed parameter models under ideal laboratory conditions. Theoretical control models are established by simulating the pipe resistance coefficients of different floors to guide the matching relationship between motor speed and air volume.

[0004] However, in actual use of range hoods, the number of bends, pipe diameter, and degree of oil accumulation in the ductwork of each household vary, resulting in significant differences in the local resistance of the ductwork. This leads to a large deviation between the theoretical control model obtained under ideal laboratory conditions and the actual situation, resulting in poor smoke extraction effect of the range hood and poor user experience. Summary of the Invention

[0005] In order to at least partially solve the problems existing in the prior art, according to one aspect of the present invention, a range hood control method is provided, the technical solution of which is as follows.

[0006] The control methods for range hoods include:

[0007] The actual resistance coefficient is determined based on the actual speed of the fan and reference parameter values.

[0008] The correction parameter value is determined based on the actual resistance coefficient and the reference parameter value. The correction parameter value is either a correction for air volume or a correction for noise.

[0009] When the corrected parameter value is the corrected air volume and the corrected air volume is not greater than the reference air volume of the reference parameter value, the first target speed is determined based on the corrected air volume and the actual speed of the fan, and the fan is controlled to work at the first target speed.

[0010] When the corrected parameter value is the corrected noise and the corrected noise is less than the first preset noise, the second target speed is determined based on the corrected noise and the actual speed of the fan, and the fan is controlled to work at the second target speed.

[0011] The range hood control method of the present invention determines the actual resistance coefficient by comparing the actual fan speed during actual operation with reference parameter values ​​under theoretical operating conditions. This actual resistance coefficient reflects the deviation between the actual operation and theoretical operating conditions of the range hood. Based on the actual resistance coefficient and the reference parameter values, the corrected airflow or corrected noise of the fan can be determined. Users can determine a first target fan speed based on the corrected airflow or a second target fan speed based on the corrected noise to meet different usage needs and scenarios. Specifically, when the corrected airflow is not greater than the reference parameter value, it can be said that the corrected airflow generated by the range hood cannot meet the airflow required under the current operating conditions. Therefore, the required speed under the current operating conditions (i.e., the first target speed) can be determined based on the corrected airflow and the actual fan speed, and the range hood can be operated at the first target speed. When the corrected noise level is lower than the first preset noise level, it indicates that the corrected noise level currently generated by the range hood has not yet reached the lower limit of noise that the user can tolerate. Therefore, the required fan speed (i.e., the second target speed) at the first preset noise level can be determined based on the corrected noise level and the actual fan speed, and the range hood can then operate at the second target speed. In this way, by determining the deviation between the actual operation of the range hood and its theoretical operating conditions, and adjusting the range hood speed according to the corrected airflow or corrected noise level to correct the above deviation, the range hood can be adapted to different usage scenarios and environments, effectively ensuring the smoke extraction effect of the range hood and the user experience.

[0012] For example, the reference parameter values ​​include reference airflow, reference speed, and reference static pressure. Determining the actual resistance coefficient based on the actual fan speed and the reference parameter values ​​includes: determining the speed deviation coefficient based on the actual fan speed and the reference speed; determining the predicted airflow based on the speed deviation coefficient and the reference airflow; determining the predicted static pressure based on the speed deviation coefficient and the reference static pressure; and determining the actual resistance coefficient based on the predicted airflow and the predicted static pressure. Thus, the speed deviation coefficient can be determined using the actual fan speed and the reference speed under theoretical operating conditions. The predicted airflow and predicted static pressure can then be determined using the speed deviation coefficient, the reference airflow, and the reference static pressure under theoretical operating conditions. Finally, the actual resistance coefficient of the fan can be determined using the predicted airflow and predicted static pressure. This effectively ensures the accuracy of the actual resistance coefficient result, thereby guaranteeing the reliability of the range hood control method.

[0013] For example, determining the first target speed based on the corrected air volume and the actual fan speed includes: determining a first coefficient based on the corrected air volume and the actual fan speed; and determining the first target speed based on the first coefficient and the corrected air volume. Thus, after determining the first target speed, the fan can be controlled to operate at the first target speed to ensure that the air volume generated by the fan meets the requirements of actual use, effectively improving the practicality and flexibility of the range hood.

[0014] For example, after determining the actual resistance coefficient based on the actual fan speed and reference parameter values, the method further includes: determining a corrected static pressure based on the actual resistance coefficient and reference static pressure; comparing the corrected static pressure and reference static pressure when the corrected airflow is greater than the reference airflow; determining a third coefficient based on the corrected static pressure and the actual fan speed when the corrected static pressure is greater than the reference static pressure; determining a third target speed based on the third coefficient and the corrected static pressure; and controlling the fan to operate at the third target speed. Thus, when the corrected airflow is greater than the reference airflow, the corrected static pressure and reference static pressure of the fan can be compared. When the corrected static pressure is greater than the reference static pressure, a third coefficient can be determined based on the corrected static pressure and the actual fan speed, and a third target speed can be determined based on the third coefficient and the corrected static pressure. This allows the fan to operate at the third target speed, ensuring sufficient smoke extraction airflow while achieving a balance between the fan's airflow and static pressure. This avoids wasted or insufficient suction power in traditional fixed airflow modes, further improving the smoke extraction efficiency and effectiveness of the range hood.

[0015] For example, the reference parameter value also includes a reference noise level. Determining the second target speed based on the corrected noise and the actual fan speed includes: determining the corrected noise based on the reference noise and the actual resistance coefficient; determining the second coefficient based on the corrected noise and the actual fan speed; and determining the second target speed based on the second coefficient and the first preset noise level. In this way, the second target speed of the fan can be determined based on the corrected noise and the first preset noise level. By controlling the fan to operate at the second target speed, while keeping the noise level of the fan within the user's tolerance range, the airflow generated by the fan can meet the actual usage requirements. This ensures the smoke extraction efficiency of the range hood while also improving the user experience.

[0016] For example, after determining the second coefficient based on the corrected noise and the actual fan speed, the method further includes: if the corrected noise is greater than a second preset noise, determining a fourth target speed based on the second coefficient and the second preset noise, where the second preset noise is greater than a first preset noise; and controlling the fan to operate at the fourth target speed. In this way, the fourth target speed of the fan can be determined based on the corrected noise and the second preset noise. By controlling the fan to operate at the fourth target speed, the noise generated by the fan is kept within the user's tolerance range, effectively ensuring the user's experience when using the range hood.

[0017] For example, before determining the speed deviation coefficient based on the actual speed and reference speed of the fan, the method further includes: acquiring multiple speed values ​​of the fan within a preset time period; and determining the actual speed of the fan based on the multiple speed values. Thus, by determining the actual speed of the fan using multiple speed values ​​acquired within a preset time period, the occurrence of large errors due to instantaneous fluctuations in fan speed can be avoided, effectively improving the accuracy and reliability of the range hood control method.

[0018] For example, the method further includes: controlling the fan to periodically operate continuously at a first target speed or a second target speed for a preset period of time, and then determining the actual resistance coefficient based on the actual fan speed and reference parameter values, wherein the fan operates at an initial speed after each preset period of time. Thus, after the fan speed is adjusted according to the above control method, the fan speed can be adjusted back to the initial speed, and after operating for a preset period of time, it can be adjusted again using the above control method, effectively ensuring the accuracy and real-time performance of the range hood control method results. Furthermore, the range hood can collect and learn from the data generated each time, and generate a learning model to continuously adapt to the actual usage environment of the range hood or the user's usage habits.

[0019] For example, the actual drag coefficient is determined using the following formula:

[0020] D = P 预测 / Q 预测 2 -k;

[0021] Where D is the actual drag coefficient, P 预测 To predict static pressure, Q 预测 To predict airflow, k is a constant. Thus, the actual resistance coefficient obtained through the above formula ensures its accuracy and verifiability, thereby guaranteeing the reliability and accuracy of the range hood control method.

[0022] For example, the corrected air volume is determined using the following formula:

[0023] Q 修正 =Q 参考 ×√k / (k+D);

[0024] Among them, Q 修正 To correct the airflow, Q 参考 Here, D is the reference airflow, k is the actual resistance coefficient, and k is a constant. Thus, the corrected airflow obtained through the above formula ensures its accuracy and verifiability, further guaranteeing the reliability and accuracy of the range hood control method.

[0025] According to another aspect of the present invention, a range hood is also provided, wherein the fan speed is adjusted using the range hood control method described above.

[0026] The range hood of the present invention uses the range hood control method described above. Since the range hood control method described above has the beneficial effects described above, the range hood using the range hood control method described above will also necessarily have the beneficial effects described above.

[0027] The advantages and features of the present invention will be described in detail below with reference to the accompanying drawings. Attached Figure Description

[0028] The following figures are included as part of this invention for understanding its principles. The figures illustrate embodiments of the invention and their descriptions, serving to explain the principles of the invention. In the figures,

[0029] Figure 1 A schematic flowchart of a range hood control method according to an embodiment of the present invention is shown. Figure 1 ;

[0030] Figure 2 A schematic flowchart of a range hood control method according to an embodiment of the present invention is shown. Figure 2 ;

[0031] Figure 3 A schematic flowchart of a range hood control method according to an embodiment of the present invention is shown. Figure 3 ;

[0032] Figure 4 A schematic flowchart of a range hood control method according to an embodiment of the present invention is shown. Figure 4 ;

[0033] Figure 5 A schematic flowchart of a range hood control method according to an embodiment of the present invention is shown. Figure 5 ;

[0034] Figure 6 A schematic flowchart of a range hood control method according to an embodiment of the present invention is shown. Figure 6 ;

[0035] Figure 7 A schematic flowchart of a range hood control method according to an embodiment of the present invention is shown. Figure 7 ;

[0036] Figure 8 A reference airflow-current curve data model diagram according to an embodiment of the present invention is shown;

[0037] Figure 9 A data model diagram of a reference air volume-reference static pressure curve according to an embodiment of the present invention is shown;

[0038] Figure 10 A current-reference speed curve data model diagram according to an embodiment of the present invention is shown;

[0039] Figure 11 A reference noise-current curve data model diagram according to an embodiment of the present invention is shown;

[0040] Figure 12 A current-corrected airflow curve is shown according to an embodiment of the present invention;

[0041] Figure 13 A current-corrected static pressure curve is shown according to an embodiment of the present invention;

[0042] Figure 14 A current-corrected noise curve is shown according to an embodiment of the present invention;

[0043] Figure 15 A schematic flowchart of a range hood control method according to an embodiment of the present invention is shown. Figure 8 ;

[0044] Figure 16 A schematic flowchart of a range hood control method according to an embodiment of the present invention is shown. Figure 9 . Detailed Implementation

[0045] In the following description, numerous details are provided to enable a thorough understanding of the invention. However, those skilled in the art will appreciate that the following description merely illustrates preferred embodiments of the invention, and that the invention can be practiced without one or more of these details. Furthermore, to avoid obscuring the invention, some technical features well-known in the art have not been described in detail.

[0046] To fully understand the embodiments of the present invention, detailed structures will be presented in the following description. Obviously, the implementation of the embodiments of the present invention is not limited to the specific details familiar to those skilled in the art. Preferred embodiments of the present invention are described in detail below; however, in addition to these detailed descriptions, the present invention may have other embodiments.

[0047] To at least partially solve the aforementioned technical problems, according to one aspect of this application, a range hood control method is provided. This range hood control method can determine the deviation between the actual operation of the range hood and its theoretical operating conditions, and correct the deviation by adjusting the rotation speed of the range hood.

[0048] Figure 1 A schematic flowchart of a range hood control method according to an embodiment of the present invention is shown. Figure 1 .like Figure 1 As shown, the range hood control method includes steps S101 to S104.

[0049] Step S101: Determine the actual resistance coefficient based on the actual speed of the fan and the reference parameter values.

[0050] The actual fan speed can be understood as the speed at which the fan inside the range hood rotates under actual operating conditions.

[0051] Reference parameter values ​​can be understood as various parameters of the fan inside the range hood under theoretical operating conditions. Specifically, reference parameter values ​​may include at least one of the following: reference airflow, reference speed, reference static pressure, and reference noise. For example... Figures 8 to 10 As shown, the reference air volume, reference speed, and reference static pressure can be obtained based on the data model established under theoretical operating conditions; that is, the reference air volume, reference speed, and reference static pressure of the fan can be obtained under the current current. Figure 11 As shown, the reference noise can be obtained based on the data model established under theoretical operating conditions, that is, the reference noise of the fan can be obtained under the current.

[0052] The actual resistance coefficient of the fan can be determined by the actual speed of the fan and the reference parameter values. This actual resistance coefficient can reflect the difference between the actual use of the fan and the theoretical operating conditions.

[0053] Step S102: Determine the correction parameter value based on the actual resistance coefficient and the reference parameter value. The correction parameter value is either the correction air volume or the correction noise.

[0054] Specifically, the corrected air volume can be determined based on the actual resistance coefficient and the reference air volume in the reference parameter value, and the corrected noise can be determined based on the actual resistance coefficient and the reference noise in the reference parameter value.

[0055] Step S103: When the corrected parameter value is the corrected air volume and the corrected air volume is not greater than the reference air volume of the reference parameter value, determine the first target speed based on the corrected air volume and the actual speed of the fan, and control the fan to work at the first target speed.

[0056] When the corrected airflow is not greater than the reference airflow, it can be understood that the airflow produced by the fan at this time cannot meet the actual usage requirements. In this case, it is necessary to adjust the actual speed of the fan to adjust the airflow. After determining the first target speed required for the fan to meet the airflow requirements, the fan is controlled to operate at the first target speed, thereby meeting the usage requirements of the fan. It can be understood that the fan current is positively correlated with the fan speed, so the fan speed can be adjusted by adjusting the fan current.

[0057] Step S104: When the correction parameter value is the correction noise and the correction noise is less than the first preset noise, determine the second target speed based on the correction noise and the actual speed of the fan, and control the fan to work at the second target speed.

[0058] The first preset noise level can be determined based on the user's actual usage habits. Specifically, the first preset noise level can be represented as the minimum value of the noise range set by the user. After determining the first preset noise level, it can be input into the fan.

[0059] When the corrected noise level is lower than the first preset noise level, it can be determined that the noise generated by the fan is below the minimum value of the noise range set by the user. Since the fan noise is positively correlated with the fan speed, the fan speed can be increased while simultaneously increasing the fan noise level. This allows the user to tolerate the noise generated by the fan while improving the fan's smoke extraction efficiency. Specifically, after determining the second target speed required for the fan to meet the first preset noise level, the fan can be controlled to operate at the second target speed, thereby improving the fan's smoke extraction effect.

[0060] It is understandable that users can choose to control the fan to operate at the first target speed or the second target speed according to their needs and the operating environment, or the fan can be set to operate at the first target speed or the second target speed by default. This application does not make any specific restrictions on this.

[0061] The range hood control method of the present invention determines the actual resistance coefficient by comparing the actual fan speed during actual operation with reference parameter values ​​under theoretical operating conditions. This actual resistance coefficient reflects the deviation between the actual operation and theoretical operating conditions of the range hood. Based on the actual resistance coefficient and the reference parameter values, the corrected airflow or corrected noise of the fan can be determined. Users can determine a first target fan speed based on the corrected airflow or a second target fan speed based on the corrected noise to meet different usage needs and scenarios. Specifically, when the corrected airflow is not greater than the reference parameter value, it can be said that the corrected airflow generated by the range hood cannot meet the airflow required under the current operating conditions. Therefore, the required speed under the current operating conditions (i.e., the first target speed) can be determined based on the corrected airflow and the actual fan speed, and the range hood can be operated at the first target speed. When the corrected noise level is lower than the first preset noise level, it indicates that the corrected noise level currently generated by the range hood has not yet reached the lower limit of noise that the user can tolerate. Therefore, the required fan speed (i.e., the second target speed) at the first preset noise level can be determined based on the corrected noise level and the actual fan speed, and the range hood can then operate at the second target speed. In this way, by determining the deviation between the actual operation of the range hood and its theoretical operating conditions, and adjusting the range hood speed according to the corrected airflow or corrected noise level to correct the above deviation, the range hood can be adapted to different usage scenarios and environments, effectively ensuring the smoke extraction effect of the range hood and the user experience.

[0062] In some embodiments, the reference parameter values ​​include reference airflow, reference rotational speed, and reference static pressure. Figure 2 A schematic flowchart of a range hood control method according to an embodiment of the present invention is shown. Figure 2 , Figure 15 A schematic flowchart of a range hood control method according to an embodiment of the present invention is shown. Figure 8 .like Figure 2 and Figure 15 As shown, step S101: Determining the actual resistance coefficient based on the actual speed of the fan and the reference parameter values ​​includes steps S201 to S204.

[0063] Step S201: Determine the speed deviation coefficient based on the actual speed of the fan and the reference speed.

[0064] The speed deviation coefficient can be determined using the following formula:

[0065] λ=n / n 参考 ;

[0066] Where λ is the speed deviation coefficient, n is the actual speed of the fan, and n 参考 This is the reference speed.

[0067] Step S202: Determine the predicted air volume based on the rotational speed deviation coefficient and the reference air volume.

[0068] The predicted air volume can be determined using the following formula:

[0069] Q 预测 =Q 参考 / √λ;

[0070] Among them, Q 预测 To predict air volume, Q 参考 The reference air volume is λ, and the rotational speed deviation coefficient is λ.

[0071] Step S203: Determine the predicted static pressure based on the speed deviation coefficient and the reference static pressure.

[0072] The predicted static pressure can be determined using the following formula:

[0073] P 预测 =P 参考 ×λ 2 ;

[0074] Among them, P 预测 To predict static pressure, P 参考 λ is the reference static pressure, and λ is the speed deviation coefficient.

[0075] Step S204: Determine the actual resistance coefficient based on the predicted air volume and predicted static pressure.

[0076] In the above embodiments, the speed deviation coefficient can be determined by using the actual speed of the fan and the reference speed of the fan under theoretical operating conditions. The predicted air volume and predicted static pressure can be determined by using the speed deviation coefficient and the reference air volume and reference static pressure of the fan under theoretical operating conditions. Then, the actual resistance coefficient of the fan can be determined by using the predicted air volume and predicted static pressure. This effectively ensures the accuracy of the actual resistance coefficient result, thereby ensuring the reliability of the range hood control method.

[0077] Figure 3 A schematic flowchart of a range hood control method according to an embodiment of the present invention is shown. Figure 3 In some embodiments, such as Figure 3 As shown, step S103: Determining the first target speed based on the corrected air volume and the actual speed of the fan includes steps S301 and S302.

[0078] Step S301: If the corrected air volume is not greater than the reference air volume, determine the first coefficient based on the corrected air volume and the actual fan speed.

[0079] like Figure 12 As shown in the figure, the "ideal curve" can represent the relationship between the current current of the fan and the reference air volume, while the "actual curve" can represent the relationship between the current current of the fan and the corrected air volume.

[0080] When the corrected air volume is not greater than the reference air volume, such as Figure 12 As shown, if the corrected air volume generated by the fan under the current current is less than the reference air volume, it can be said that the air volume generated by the fan under actual operating conditions does not meet the preset requirements, i.e., it cannot meet the requirements for use. In this case, the first coefficient can be determined using the following formula:

[0081] Q 修正 =n α ;

[0082] Where α is the first coefficient, Q 修正 To correct for air volume, n is the actual speed of the fan.

[0083] Step S302: Determine the first target rotational speed based on the first coefficient and the corrected air volume.

[0084] After determining the value of the first coefficient (α), substitute the value of the first coefficient into the above formula, and determine the value of the corrected air volume as the value of the reference air volume so that the corrected air volume of the fan can meet the actual use requirements. Then, the first target speed can be determined using the following formula:

[0085] Q 修正(参考) =n1 α ;

[0086] Where n1 is the first target rotational speed, Q 修正(参考) The corrected air volume is the same as the reference air volume, and α is the first coefficient determined above.

[0087] In the above embodiments, after determining the first target speed, the fan can be controlled to run at the first target speed to ensure that the air volume generated by the fan can meet the requirements of actual use, effectively improving the practicality and flexibility of the range hood.

[0088] Figure 4 A schematic flowchart of a range hood control method according to an embodiment of the present invention is shown. Figure 4 In some embodiments, such as Figure 4 and Figure 15 As shown, after determining the actual resistance coefficient based on the actual fan speed and reference parameter values ​​in step S101, the range hood control method further includes steps S401 and S405.

[0089] Step S401: Determine the corrected static pressure based on the actual resistance coefficient and the reference static pressure.

[0090] P 修正 =P 参考 ×(k+D) / k;

[0091] Among them, P 修正 To correct the static pressure, P 参考 Here, D is the reference static pressure, D is the actual resistance coefficient, and k is a constant. It is understandable that each fan has a corresponding constant K.

[0092] Step S402: When the corrected air volume is greater than the reference air volume, compare the magnitudes of the corrected static pressure and the reference static pressure.

[0093] When the corrected static pressure is greater than the reference static pressure, it means that the air volume generated by the fan meets the actual usage requirements. In this case, the smoke extraction effect of the range hood can be further guaranteed by adjusting the static pressure of the fan.

[0094] Step S403: When the corrected static pressure is greater than the reference static pressure, determine the third coefficient based on the corrected static pressure and the actual speed of the fan.

[0095] like Figure 13 As shown in the figure, the "ideal curve" can represent the relationship between the current current of the fan and the reference static pressure, while the "actual curve" can represent the relationship between the current current of the fan and the corrected static pressure.

[0096] When the corrected static pressure is greater than the reference static pressure, the higher static pressure not only easily leads to airflow loss and increased energy consumption, but also easily causes greater noise, thus affecting the user experience. In this case, a third coefficient can be determined based on the corrected static pressure and the actual fan speed, and the third coefficient can be used to determine the third target speed of the fan.

[0097] The third coefficient can be determined using the following formula:

[0098] P 修正 =n β ;

[0099] Where β is the third coefficient, P 修正 To correct for static pressure, n is the actual speed of the fan.

[0100] Step S404: Determine the third target rotational speed based on the third coefficient and the corrected static pressure.

[0101] After determining the value of the third coefficient (β), substitute the value of the third coefficient into the above formula, and determine the value of the corrected static pressure as the value of the reference static pressure so that the corrected static pressure of the fan can meet the actual use requirements. Then, the third target speed can be determined using the following formula:

[0102] P 修正(参考) =n3 β ;

[0103] Where n3 is the third target rotational speed, P 修正(参考) To obtain the same corrected static pressure as the reference static pressure, β is the third coefficient determined above.

[0104] Step S405: Control the fan to operate at the third target speed.

[0105] In the above embodiments, when the corrected air volume is greater than the reference air volume, the corrected static pressure of the fan and the reference static pressure can be compared. When the corrected static pressure is greater than the reference static pressure, a third coefficient can be determined based on the corrected static pressure and the actual fan speed. Then, a third target speed can be determined based on the third coefficient and the corrected static pressure. The fan is then controlled to operate at the third target speed. This ensures the smoke extraction volume of the range hood while also achieving a balance between the fan's air volume and static pressure. This avoids wasted or insufficient suction power in the traditional fixed air volume mode, further improving the smoke extraction efficiency and effect of the range hood.

[0106] In some embodiments, the reference parameter value also includes reference noise. Figure 5 A schematic flowchart of a range hood control method according to an embodiment of the present invention is shown. Figure 5 , Figure 16 A schematic flowchart of a range hood control method according to an embodiment of the present invention is shown. Figure 9 .like Figure 5 and Figure 16 As shown, in step S104: determining the second target speed based on the corrected noise and the actual speed of the fan includes steps S501 and S503.

[0107] Step S501: Determine the corrected noise based on the reference noise and the actual drag coefficient.

[0108] The corrected noise can be determined using the following formula:

[0109] E 修正 =E 参考 ×√((k+D) / k);

[0110] Among them, E 修正 To correct noise, E 参考 For reference noise, D is the actual drag coefficient, and k is a constant. It is understandable that each fan has a corresponding constant K.

[0111] Step S502: Determine the second coefficient based on the corrected noise and the actual speed of the fan.

[0112] The second coefficient can be determined using the following formula:

[0113] E 修正 =n b ;

[0114] Where b is the second coefficient, E 修正 To correct for noise, n is the actual rotational speed of the fan.

[0115] Step S503: Determine the second target rotational speed based on the second coefficient and the first preset noise.

[0116] Specifically, after determining the value of the second coefficient (b), the value of the second coefficient is substituted into the above formula, and the value of the noise correction is determined as the value of the first preset noise. Then, the second target rotational speed can be determined using the following formula:

[0117] E 第一 =n2 b ;

[0118] Where n2 is the second target rotational speed, E 第一 b is the corrected noise that is the same as the first preset noise, and b is the second coefficient determined above.

[0119] In the above embodiments, the second target speed of the fan can be determined based on the corrected noise and the first preset noise. By controlling the fan to run at the second target speed, the air volume generated by the fan can meet the actual usage requirements while keeping the noise generated by the fan within the user's tolerance range. In this way, the smoke extraction efficiency of the range hood is guaranteed, while also improving the user experience.

[0120] Figure 6 A schematic flowchart of a range hood control method according to an embodiment of the present invention is shown. Figure 6 In some embodiments, such as Figure 6 As shown, after determining the second coefficient based on the corrected noise and the actual speed of the fan, the range hood control method further includes steps S601 and S602.

[0121] Step S601: If the corrected noise is greater than the second preset noise, determine the fourth target speed according to the second coefficient and the second preset noise, wherein the second preset noise is greater than the first preset noise.

[0122] The second preset noise level can be determined based on the user's actual usage habits. Specifically, the second preset noise level can be represented as the maximum value of the noise range set by the user. After determining the second preset noise level, it can be input into the fan.

[0123] like Figure 14 As shown in the figure, the "ideal curve" can represent the correspondence between the current current of the fan and the reference noise, while the "actual curve" can represent the correspondence between the current current of the fan and the corrected noise.

[0124] When the corrected noise is greater than the second preset noise, such as Figure 14 As shown, it can be determined that the noise generated by the fan has exceeded the maximum value of the noise range set by the user, and the fan noise needs to be reduced. Specifically, the noise correction value can be determined as the second preset noise value, and then the fourth target rotational speed can be determined using the following formula:

[0125] E 第二 =n4 b ;

[0126] Where n4 is the fourth target rotational speed, E 第二 The corrected noise is the same as the second preset noise, and b is the second coefficient determined above.

[0127] like Figure 16 As shown, when the corrected noise is between the first preset noise and the second preset noise, it can be said that the noise generated by the fan is within the noise range set by the user, and at this time the current speed of the fan can be kept unchanged.

[0128] Step S602: Control the fan to operate at the fourth target speed.

[0129] In the above embodiments, the fourth target speed of the fan can be determined based on the corrected noise and the second preset noise. By controlling the fan to run at the fourth target speed, the noise generated by the fan is kept within the user's tolerance range, effectively ensuring the user's experience when using the range hood.

[0130] Figure 7 A schematic flowchart of a range hood control method according to an embodiment of the present invention is shown. Figure 7 In some embodiments, such as Figure 7 , Figure 15 and Figure 16 As shown, before determining the speed deviation coefficient based on the actual fan speed and the reference speed in step S201, the range hood control method further includes steps S701 and S702.

[0131] Step S701: Obtain multiple speed values ​​of the fan within a preset time period;

[0132] Step S702: Determine the actual speed of the fan based on multiple speed values.

[0133] The preset time and speed value can be determined according to the user's actual usage habits. For example, the preset time can be 5 seconds, and the number of speed values ​​can be 5, that is, 5 speed values ​​of the fan can be obtained within 5 seconds.

[0134] Understandably, the actual fan speed can be determined by calculating the average or median of multiple speed values.

[0135] In the above embodiments, by determining the actual fan speed by obtaining multiple speed values ​​within a preset time, the occurrence of large errors due to instantaneous fluctuations in fan speed can be avoided, effectively improving the accuracy and reliability of the range hood control method.

[0136] Figure 15 A schematic flowchart of a range hood control method according to an embodiment of the present invention is shown. Figure 8 In some embodiments, such as Figure 15 and Figure 16 As shown, the range hood control method further includes: controlling the fan to periodically operate continuously at a first target speed or a second target speed for a preset period of time, and then determining the actual resistance coefficient based on the actual speed of the fan and reference parameter values, wherein the fan operates at the initial speed after each preset period of time.

[0137] The initial speed mentioned above can be expressed as the fan speed under the initial setting, in other words, the fan speed in the factory default mode. The preset time mentioned above can be set by the user. For example, the preset time can be set to 3 minutes. After the fan has been running at the first target speed or the second target speed for 3 minutes, the fan speed can be adjusted back to the initial speed, and the actual resistance coefficient can be determined again based on the current actual speed of the fan and the reference parameter value, so as to re-determine the first target speed or the second target speed of the fan. By periodically determining the first target speed or the second target speed in this way, the accuracy of the range hood control method can be effectively guaranteed.

[0138] In the above embodiments, after the fan speed is adjusted according to the above control method, the fan speed can be adjusted back to the initial speed, and after running for a preset period of time, it can be adjusted again using the above control method, effectively ensuring the accuracy and real-time performance of the range hood control method results. Furthermore, the range hood can collect and learn from the data generated each time, and generate a learning model to continuously adapt to the actual usage environment of the range hood or the user's usage habits.

[0139] In some embodiments, the actual drag coefficient is determined using the following formula:

[0140] D = P 预测 / Q 预测 2 -k;

[0141] Where D is the actual drag coefficient, P 预测 To predict static pressure, Q 预测 For predicting air volume, k is a constant. It is understandable that each fan has a corresponding constant K.

[0142] In the above embodiments, the actual resistance coefficient obtained by the above formula can ensure the accuracy and verifiability of the actual resistance coefficient, thereby ensuring the reliability and accuracy of the range hood control method.

[0143] In some embodiments, the corrected air volume is determined using the following formula:

[0144] Q 修正 =Q 参考 ×√k / (k+D);

[0145] Among them, Q 修正 To correct the airflow, Q 参考 The reference air volume is D, the actual resistance coefficient is k, and k is a constant.

[0146] Understandably, each wind turbine has a corresponding constant K.

[0147] In the above embodiments, the corrected air volume obtained by the above formula can ensure the accuracy and verifiability of the corrected air volume, further ensuring the reliability and accuracy of the range hood control method.

[0148] According to another aspect of the present invention, a range hood is also provided, wherein the fan speed is adjusted using the range hood control method described above.

[0149] The range hood of the present invention uses the range hood control method described above. Since the range hood control method described above has the beneficial effects described above, the range hood using the range hood control method described above will also necessarily have the beneficial effects described above.

[0150] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front", "rear", "up", "down", "left", "right", "horizontal", "vertical", "horizontal", "top", and "bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms 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, and therefore should not be construed as a limitation on the scope of protection of this invention; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0151] For ease of description, relative terms such as "above," "over," "on the upper surface of," and "above" are used here to describe the regional positional relationship of one or more components or features shown in the figures to other components or features. It should be understood that relative terms include not only the orientation of the component as depicted in the figure but also different orientations during use or operation. For example, if the components in the figures are inverted as a whole, "above" or "above other components or features" will include cases where the component is "below" or "under" other components or features. Thus, the exemplary term "above" can include both "above" and "below." Furthermore, these components or features may also be positioned at other different angles (e.g., rotated 90 degrees or other angles), and this document intends to include all such cases.

[0152] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, parts, components, and / or combinations thereof.

[0153] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0154] The present invention has been described through the above embodiments. However, it should be understood that the above embodiments are for illustrative purposes only and are not intended to limit the invention to the scope of the described embodiments. Furthermore, those skilled in the art will understand that the present invention is not limited to the above embodiments, and many more variations and modifications can be made based on the teachings of the present invention, all of which fall within the scope of protection claimed by the present invention. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A control method for a range hood, characterized by, The method comprises: determining an actual resistance coefficient according to an actual rotating speed of the fan and a reference parameter value; determining a corrected parameter value according to the actual resistance coefficient and the reference parameter value, the corrected parameter value being a corrected air volume or a corrected noise; in a case where the corrected parameter value is the corrected air volume and the corrected air volume is not greater than a reference air volume of the reference parameter value, determining a first target rotating speed according to the corrected air volume and the actual rotating speed of the fan, and controlling the fan to work at the first target rotating speed; in a case where the corrected parameter value is the corrected noise and the corrected noise is less than a first preset noise, determining a second target rotating speed according to the corrected noise and the actual rotating speed of the fan, and controlling the fan to work at the second target rotating speed.

2. The range hood control method of claim 1, wherein, The reference parameter value comprises a reference air volume, a reference rotating speed and a reference static pressure, and determining the actual resistance coefficient according to the actual rotating speed of the fan and the reference parameter value comprises: determining a rotating speed deviation coefficient according to the actual rotating speed of the fan and the reference rotating speed; determining a predicted air volume according to the rotating speed deviation coefficient and the reference air volume; determining a predicted static pressure according to the rotating speed deviation coefficient and the reference static pressure; determining the actual resistance coefficient according to the predicted air volume and the predicted static pressure.

3. The range hood control method of claim 1, wherein, Determining the first target rotating speed according to the corrected air volume and the actual rotating speed of the fan comprises: determining a first coefficient according to the corrected air volume and the actual rotating speed of the fan; determining the first target rotating speed according to the first coefficient and the corrected air volume.

4. The range hood control method of claim 1, wherein, After determining the actual resistance coefficient according to the actual rotating speed of the fan and the reference parameter value, the method further comprises: determining a corrected static pressure according to the actual resistance coefficient and the reference static pressure; in a case where the corrected air volume is greater than the reference air volume, comparing the corrected static pressure and the reference static pressure; in a case where the corrected static pressure is greater than the reference static pressure, determining a third coefficient according to the corrected static pressure and the actual rotating speed of the fan; determining a third target rotating speed according to the third coefficient and the corrected static pressure; controlling the fan to work at the third target rotating speed.

5. The range hood control method of claim 2, the reference parameter values further comprising a reference noise, wherein, Determining the second target rotating speed according to the corrected noise and the actual rotating speed of the fan comprises: determining a corrected noise according to the reference noise and the actual resistance coefficient; determining a second coefficient according to the corrected noise and the actual rotating speed of the fan; determining the second target rotating speed according to the second coefficient and the first preset noise.

6. The range hood control method according to claim 5, wherein, After determining the second coefficient according to the corrected noise and the actual rotating speed of the fan, the method further comprises: in a case where the corrected noise is greater than a second preset noise, determining a fourth target rotating speed according to the second coefficient and the second preset noise, the second preset noise being greater than the first preset noise; controlling the fan to work at the fourth target rotating speed.

7. The range hood control method according to claim 2, wherein Before determining the rotating speed deviation coefficient according to the actual rotating speed of the fan and the reference rotating speed, the method further comprises: acquiring a plurality of rotating speed values of the fan within a preset time; determining the actual rotating speed of the fan according to the plurality of rotating speed values.

8. The range hood control method of claim 1, wherein, The method further comprises: controlling the fan to periodically work at the first target rotating speed or the second target rotating speed for a preset time period, and then determining the actual resistance coefficient according to the actual rotating speed of the fan and the reference parameter value, wherein the fan works at an initial rotating speed after each preset time period.

9. The range hood control method of claim 1, wherein, The actual resistance coefficient is determined by using the following formula: D = P 预测 / Q 预测 2 - k; where D is the actual drag coefficient, P 预测 Q 预测 for predicting the wind volume, k is a constant.

10. The range hood control method of claim 1, wherein, The corrected air volume is determined by using the following formula: Q 修正 = Q 参考 x sqrt(k) / (k+D); where Q 修正 is the corrected air volume, Q 参考 is the reference air volume, D is the actual drag coefficient, and k is a constant.

11. A range hood characterized by, The fan rotating speed is adjusted by using the control method of the range hood according to any one of claims 1-10.

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