A range hood and a control method thereof

Abstract

The embodiment of the application provides a range hood and a control method thereof, and relates to the technical field of range hoods. The range hood comprises: a fan assembly, the fan assembly comprising: an impeller and a motor for driving the impeller to rotate; a controller, the controller being connected with the motor and being used for controlling the motor to operate; a display, the display being connected with the controller; and the controller being configured to: determine a real-time wind force coefficient according to a smoke exhaust resistance coefficient and a real-time current of the motor, the smoke exhaust resistance coefficient being related to a current flowing through the motor and a rotating speed of the motor; and control the display to display the real-time wind force coefficient. The range hood provided by the embodiment of the application can determine the real-time wind force coefficient of the range hood according to the smoke exhaust resistance coefficient and the real-time current, and display the real-time wind force coefficient, so that the user can intuitively know the operating state of the range hood, and the use experience of the user is improved.

Description

Technical Field

[0001] This application relates to the field of range hood technology, and in particular to a range hood and its control method. Background Technology

[0002] Range hoods have maintained rapid development in recent years. Range hoods are installed above or to the side of the stove and integrate a fan. The current operation process of range hoods is that the fan rotates at high speed to create a negative pressure zone in a certain space above the stove, which draws the oily fumes into the range hood. The oily fumes are purified and separated into oil droplets and smoke. The oil droplets are collected in the oil cup, and the smoke is discharged along the flue.

[0003] While range hoods with relevant technologies can display their airflow, this display only shows the nominal airflow corresponding to the operating setting. In actual use, the environmental factors, including atmospheric pressure, flue resistance, shared flue pressure, and external wind interference, vary between users or at different times. Therefore, the real-time airflow of the range hood does not match the nominal airflow for each operating setting. Users cannot directly perceive the real-time airflow and static pressure (air pressure) of the range hood, nor can they determine if the range hood is working properly or if a different setting (speed) should be selected. This can easily lead to insufficient or excessive airflow. Insufficient airflow prevents the removal of cooking fumes, harming the user's health; excessive airflow results in wasted energy.

[0004] Therefore, how to display the real-time airflow and air pressure of a range hood during operation has become a technical problem that urgently needs to be solved. Summary of the Invention

[0005] This application provides a range hood and its control method, which enables users to intuitively understand the operating status of the range hood, thereby improving the user experience.

[0006] In a first aspect, embodiments of this application provide a range hood, comprising: a fan assembly, the fan assembly including: an impeller and a motor for driving the impeller to rotate; a controller connected to the motor for controlling the operation of the motor; and a display connected to the controller; the controller is configured to: determine a real-time wind force coefficient based on the exhaust resistance coefficient and the real-time current of the motor, the exhaust resistance coefficient being related to the current flowing through the motor and the speed of the motor; and control the display to show the real-time wind force coefficient.

[0007] The range hood provided in this application determines its real-time airflow coefficient based on the real-time current of the motor during operation and the duct resistance coefficient. Since the duct resistance coefficient characterizes the pressure of the common duct in the environment where the range hood is located, determining the real-time airflow coefficient based on the real-time current and duct resistance coefficient allows for the determination of the airflow coefficient corresponding to the motor operating at real-time current under conditions of common duct pressure. This value is then displayed on a monitor, allowing users to intuitively understand the operating status of the range hood and significantly improving the user experience.

[0008] In conjunction with the first implementation of the first aspect, before the step of determining the real-time wind force coefficient based on the smoke exhaust resistance coefficient and the real-time current, the controller is also configured to: control the motor to rotate with n different currents, obtain the motor speed at each current, where n is an integer greater than 1; and determine the smoke exhaust resistance coefficient based on the n different currents and n different speeds.

[0009] In conjunction with the second implementation method of the first aspect, the real-time wind force coefficient includes: real-time air volume and real-time wind pressure; the step of determining the real-time wind force coefficient based on the smoke exhaust resistance coefficient and the real-time current includes: determining the nominal wind force coefficient corresponding to the real-time current based on the real-time current and the pre-stored correspondence between the fixed current and the nominal wind force coefficient; determining the real-time air volume based on the smoke exhaust resistance coefficient and the nominal wind force coefficient; and determining the real-time wind pressure based on the real-time air volume and the smoke exhaust resistance coefficient.

[0010] In conjunction with the third implementation method of the first aspect, the display interface of the monitor includes: an air volume window and an air pressure window; the steps of controlling the monitor to display the real-time wind force coefficient include: controlling the monitor to display the real-time air volume in the air volume window; controlling the monitor to display the real-time air pressure in the air pressure window.

[0011] In conjunction with the fourth implementation method of the first aspect, the controller is also configured to: respond to the gear adjustment action, control the motor to run at the adjusted gear, thereby changing the real-time current; read the adjusted real-time current; determine the adjusted real-time wind force coefficient based on the adjusted real-time current and the smoke exhaust resistance coefficient; and control the display to show the adjusted real-time wind force coefficient.

[0012] Secondly, embodiments of this application provide a control method for a range hood. The range hood includes: a fan assembly, which includes an impeller and a motor for driving the impeller to rotate; a controller connected to the motor for controlling the operation of the motor; and a display connected to the controller. The method includes: determining a real-time wind force coefficient based on the exhaust resistance coefficient and the real-time current of the motor, wherein the exhaust resistance coefficient is related to the current flowing through the motor and the motor speed; and controlling the display to show the real-time wind force coefficient.

[0013] In conjunction with the first implementation of the second aspect, before the step of determining the real-time wind force coefficient based on the smoke exhaust resistance coefficient and the real-time current, the method further includes: controlling the motor to rotate with n different currents, obtaining the motor speed at each current, where n is an integer greater than 1; and determining the smoke exhaust resistance coefficient based on the n different currents and n different speeds.

[0014] In conjunction with the second implementation method of the second aspect, the real-time wind force coefficient includes: real-time air volume and real-time wind pressure. The steps for determining the real-time wind force coefficient based on the smoke exhaust resistance coefficient and the real-time current include: determining the nominal wind force coefficient corresponding to the real-time current based on the correspondence between the real-time current and the pre-stored fixed current and the nominal wind force coefficient; determining the real-time air volume based on the smoke exhaust resistance coefficient and the nominal wind force coefficient; and determining the real-time wind pressure based on the real-time air volume and the smoke exhaust resistance coefficient.

[0015] In conjunction with the third implementation method of the second aspect, the display interface of the monitor includes: an air volume window and an air pressure window. The steps to control the monitor to display the real-time wind force coefficient include: controlling the monitor to display the real-time air volume in the air volume window; and controlling the monitor to display the real-time air pressure in the air pressure window.

[0016] In conjunction with the fourth implementation method of the second aspect, the method also includes: responding to the gear adjustment action, controlling the motor to run at the adjusted gear to adjust the real-time current; reading the adjusted real-time current; determining the adjusted wind force coefficient based on the adjusted real-time current and the smoke exhaust resistance coefficient; and controlling the display to show the adjusted wind force coefficient.

[0017] Thirdly, embodiments of this application provide a controller, including: one or more processors; one or more memories; wherein the one or more memories are used to store computer program code, the computer program code including computer instructions, and when the one or more processors execute the computer instructions, the controller executes any of the control methods provided in the second aspect and possible implementations.

[0018] Fourthly, embodiments of this application provide a computer-readable storage medium including computer instructions that, when controlled on a computer, cause the computer to perform any of the control methods provided in the second aspect and possible implementations.

[0019] Fifthly, embodiments of the present invention provide a computer program product that can be directly loaded into a memory and contains software code. After being loaded and executed by a computer, the computer program product can implement any of the control methods provided in the second aspect and possible implementations.

[0020] It should be noted that the aforementioned computer instructions may be stored, in whole or in part, on a computer-readable storage medium. This computer-readable storage medium may be packaged together with the controller's processor or may be packaged separately from the controller's processor; this application does not impose any limitations on this.

[0021] The beneficial effects described in aspects two through five of this application can be referred to the analysis of the beneficial effects of aspect one, and will not be repeated here. Attached Figure Description

[0022] The accompanying drawings are provided to further understand the technical solutions of the present invention and constitute a part of the specification. They are used together with the embodiments of this application to explain the technical solutions of the present invention and do not constitute a limitation on the technical solutions of the present invention.

[0023] Figure 1 A schematic diagram illustrating the composition of a range hood provided in an embodiment of this application;

[0024] Figure 2 A schematic diagram of the composition of a wind turbine assembly provided in an embodiment of this application;

[0025] Figure 3 A schematic diagram of the hardware architecture of a range hood provided in an embodiment of this application;

[0026] Figure 4 A schematic diagram of a display interface provided in an embodiment of this application;

[0027] Figure 5 A flowchart of a control method for a range hood controller provided in this application embodiment;

[0028] Figure 6 A flowchart for determining the smoke exhaust resistance coefficient is provided in this application embodiment;

[0029] Figure 7 A flowchart for determining real-time wind force coefficient is provided as an embodiment of this application;

[0030] Figure 8 A flowchart for determining the nominal wind force coefficient is provided as an embodiment of this application;

[0031] Figure 9 A schematic diagram of airflow and air pressure curves when there is no common flue pressure is provided for an embodiment of this application;

[0032] Figure 10 This is a schematic diagram of the air volume and air pressure curves when the smoke exhaust resistance coefficient is β, provided in an embodiment of this application.

[0033] Figure 11 A comparative schematic diagram of two air volume and air pressure curves provided in the embodiments of this application;

[0034] Figure 12 A schematic diagram of the display interface of another display provided in an embodiment of this application;

[0035] Figure 13 A flowchart illustrating another control method for a range hood controller provided in this application embodiment;

[0036] Figure 14 A flowchart illustrating a method for controlling a range hood, as provided in an embodiment of this application;

[0037] Figure 15 A flowchart illustrating a method for determining real-time wind force coefficients provided in this application embodiment;

[0038] Figure 16 A flowchart illustrating a method for determining the nominal wind force coefficient provided in this application embodiment;

[0039] Figure 17 A flowchart illustrating another method for controlling a range hood provided in this application embodiment;

[0040] Figure 18 This is a schematic diagram of the hardware architecture of an electronic device provided in an embodiment of this application. Detailed Implementation

[0041] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0042] It should be noted that the terms "first" and "second" used in the embodiments of this invention are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0043] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "connected" and "linked" should be interpreted broadly, for example, as a fixed connection, a detachable connection, or an integral connection. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances. Furthermore, when describing pipelines, the terms "connected" and "linked" as used in this application have the meaning of establishing electrical connection. The specific meaning needs to be understood in conjunction with the context.

[0044] In the embodiments of this application, the terms "exemplary" or "for example" are used to indicate that something is an example, illustration, or description. Any embodiment or design that is described as "exemplary" or "for example" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or design. Specifically, the use of the terms "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0045] Figure 1 The diagram shown is a schematic representation of the composition of a range hood 100 provided in this application according to an exemplary embodiment. Figure 1 As shown, the range hood 100 may include: a housing 101, a filter 102, an oil collection tank 103, an air intake 104, an air vent door 105, a display 106, and a fan assembly ( Figure 1 (Not shown in the image).

[0046] In some embodiments, the housing 101 is used to protect the internal electrical components of the range hood, seal the channels between the inside and outside of the range hood, and prevent damage to the electrical components.

[0047] In some embodiments, the filter 102 is used to separate the oil fumes passing through the air intake 104, preventing oil stains from entering the range hood and affecting the safety and service life of the internal components of the range hood.

[0048] In some embodiments, an oil storage tank 103 is disposed below a filter screen 102 for receiving grease filtered out from the filter screen 102.

[0049] In some embodiments, the air intake 104 is used to draw in cooking fumes, and the air intake 104 is provided with an air intake door 105 for opening or closing the air intake 104.

[0050] In some embodiments, the air intake door 105 is hinged to the housing 101, and the air intake 104 can be opened or closed by moving the air intake door 105. When the air intake door 105 closes the air intake 104, the outer surface of the air intake door 105 is flush with the outer surface of the housing 101, making it convenient for users to clean the range hood.

[0051] In some embodiments, the display 106 may be a liquid crystal display (LCD) or an organic light-emitting diode (OLED) display. The specific type, size, and resolution of the display are not limited. The display 106 can be used to display the control panel of the range hood. The range hood can use the display 106 to provide feedback on its current operating status, such as the current operating level of the fan assembly and the oil fume concentration value measured by the oil fume sensor.

[0052] In some embodiments, the fan assembly is used to power the flow of fumes, so that the fumes enter through the air intake 104 and are discharged after passing through the filter 102.

[0053] like Figure 1 As shown, the filter 102, oil reservoir 103, air intake 104, air vent door 105, and display 106 are all connected to the housing 101. It should be understood that... Figure 1 Only some components of the range hood are shown; the range hood may also contain other components not shown.

[0054] Optionally, the outer casing 101, filter 102, oil collection tank 103, air intake 104, air vent door 105, and display 106 of the range hood 100 can all be made of various types of components known in the art or that may emerge in the future. The structure of range hoods is well known in the art, so it will not be described in further detail here.

[0055] Please see Figure 2 , Figure 2 The diagram shown is a schematic representation of a wind turbine assembly provided in an embodiment of this application. Figure 2 As shown, the fan assembly 107 includes: a volute 1071, an impeller 1072, and a motor 1073.

[0056] In some embodiments, the volute 1071 is the exhaust pipe inside the range hood, which helps to expel oil fumes from the vent and ensures continuous power without slowing down during the operation of the range hood.

[0057] In some embodiments, the motor 1073 is used to drive the impeller 1072 to rotate, thereby causing the oily gas in the volute 1071 to be discharged from the vent.

[0058] Those skilled in the art will understand that Figure 2 The hardware structure shown does not constitute a limitation on the wind turbine assembly. The wind turbine assembly may include more or fewer components than shown, or combine certain components, or have different component arrangements. The wind turbine assembly may employ various types of wind turbine assemblies known in the art or that may emerge in the future. The structure of the wind turbine assembly is well known in the art, and therefore will not be described in further detail herein.

[0059] The following is combined Figure 3 The general hardware architecture of the range hood 100 is explained.

[0060] Figure 3 The diagram shown is a hardware architecture schematic of a range hood 100 provided in an embodiment of this application. Figure 3As shown, the range hood 100 may specifically include components such as a display 106, a fan assembly 107, a drive assembly 108, a communicator 109, a human-machine interface device 110, a power supply 111, and a controller 112. These components can be connected via one or more communication buses or signal lines. Figure 3 (Not shown in the image) communicates. Those skilled in the art will understand that... Figure 3 The hardware structure shown does not constitute a limitation on the range hood. The range hood may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0061] In some embodiments, the drive component 108 is used to drive the range hood hardware to complete corresponding actions, such as opening the smoke baffle, closing the smoke inlet, and driving the oil removal component to move on the surface of the smoke baffle to remove oil.

[0062] In some embodiments, the communicator 109 can establish communication connections with other components according to various communication protocol types. The communicator 109 may include at least one of the following: a radio frequency (RF) module, a cellular module, a near field communication (NFC) module, or other network communication protocol chips or near field communication protocol chips, as well as an infrared receiver.

[0063] For example, the controller 112 can interact with other devices via the communicator 109, such as receiving concentration sensing values ​​acquired by a target sensor. In this case, the communicator 109 can be used to connect the controller 112 with other components to receive and transmit signals, and can deliver received data to the controller 112 for processing. For example, it can receive the ambient oil fume concentration value sent by the target sensor and send the received ambient oil fume concentration value to the controller 112.

[0064] In some embodiments, the human-computer interaction device 110 may include a touchpad or the like. It can collect touch events from the user on or near the touchpad (e.g., user actions using a finger, stylus, or any suitable object on or near the touchpad) and send the collected information to other devices, such as the controller 112. The touchpad can also be any other device capable of collecting user commands; this embodiment does not impose any limitations on this.

[0065] In some embodiments, the power supply 111 provides operating power to the various electrical components of the range hood 100 under the control of the controller 112. The power supply 111 may include a battery and related control circuitry.

[0066] In some embodiments, the controller 112 is the control center of the range hood 100, connecting various parts of the range hood via various interfaces and lines. It performs various functions and processes data by running or executing programs stored in memory and calling data stored in memory. In some embodiments, the controller 112 may include one or more processing units.

[0067] In addition, the controller 112 can be used to control the operation of various components inside the range hood 100 so that the operation of each component of the range hood 100 can realize the predetermined functions of the range hood.

[0068] In some embodiments, controller 112 refers to a device that can generate operation control signals according to instruction opcodes and timing signals, instructing the fan assembly 107 and drive assembly 108 to execute control instructions. Exemplarily, controller 112 can be a central processing unit (CPU), a network processor (NP), a digital signal processor (DSP), a microprocessor, a microcontroller, a programmable logic device (PLD), or any combination thereof. Controller 112 can also be other devices with processing functions, such as circuits, devices, or software modules; this application embodiment does not impose any limitations on this.

[0069] Please see Figure 4 The display 106 can be used to show the control panel of the range hood and the current working status of the range hood, such as the current working level of the fan assembly, temperature information, and time information. It does not display the real-time airflow and real-time air pressure of the range hood. Related range hoods can display the airflow, but this is only the nominal airflow corresponding to the working level. In actual use, the environmental conditions between users or at different times for a single user vary, including atmospheric pressure, flue resistance, public flue pressure, and external wind interference. Therefore, the real-time airflow of the range hood is not the same as the nominal airflow corresponding to the working level.

[0070] Based on this, this application provides a range hood that can determine the real-time wind force coefficient during operation based on the exhaust resistance coefficient and the real-time current during operation. This allows the display to show the real-time wind force coefficient, enabling users to intuitively understand the operating status of the range hood.

[0071] Figure 5 For a control flowchart of a range hood controller provided in this application embodiment, please refer to [link / reference]. Figure 5Controller 112 is configured to execute S501-S502:

[0072] S501. Determine the real-time wind force coefficient based on the smoke exhaust resistance coefficient and the real-time current.

[0073] Among them, the real-time current is the current of the motor when it is running at the speed selected by the user, and the real-time wind force coefficient includes the real-time air volume and the real-time wind pressure.

[0074] In some embodiments, before determining the target airflow based on the exhaust resistance coefficient, it is also necessary to determine the exhaust resistance coefficient of the range hood. As a feasible implementation method, the exhaust resistance coefficient can be determined by the following steps: controlling the motor to operate at a fixed current to obtain the corresponding rotational speed; and determining the exhaust resistance coefficient based on the fixed current and the rotational speed corresponding to the fixed current.

[0075] Because the resistance of the common flue of range hoods varies from household to household, the corresponding speed of the motor when running at a fixed current will also differ. Therefore, by running the motor at a fixed current for each household, the motor speed can be obtained. The resulting fixed current and corresponding speed can then reflect the resistance of the common flue of the range hood.

[0076] It should be understood that, as a feasible approach, in order to avoid measurement errors and ensure the accuracy of the obtained rotational speed, the motor can be controlled to run at a fixed current for a preset time, and then the corresponding rotational speed when the motor rotates at a fixed current can be obtained.

[0077] The preset time is pre-set by the system. In actual application, the preset time can be set according to needs, and this application embodiment does not impose any limitations on it. For example, as a feasible implementation method, the preset time is 10 seconds, and the motor is controlled to run at a fixed speed for 10 seconds to obtain the current when the motor is rotating.

[0078] Because the pressure conditions of the common flue where the range hood is located are different, the corresponding speed of the motor when running at a fixed current is also different. Therefore, the exhaust resistance coefficient can be obtained based on the corresponding speed of the motor when running at a fixed current, so as to characterize the pressure conditions of the common flue where the range hood is located.

[0079] In some embodiments, since there are uncertainties when obtaining the rotational speed corresponding to a fixed current, multiple measurements can be performed to avoid errors caused by a single measurement, so as to ensure the accuracy of the obtained exhaust resistance coefficient.

[0080] As another feasible implementation method, please refer to Figure 6 Determining the smoke exhaust resistance coefficient can include S601-S602:

[0081] S601: Control the motor to rotate with n different currents, and obtain the motor speed under each current.

[0082] S602. Determine the exhaust resistance coefficient based on n different currents and n different rotational speeds.

[0083] Where n is an integer greater than 1.

[0084] As a feasible approach, the smoke exhaust resistance coefficient can be determined according to formula (1):

[0085] , formula (1)

[0086] in, i is the smoke exhaust resistance coefficient. i For a fixed current, r i Let n be the rotational speed corresponding to a fixed current, where n is an integer greater than 1.

[0087] In other words, multiple measurements can be performed, allowing the motor to run at fixed currents i1, i2, ..., in for a preset time, to obtain the corresponding rotational speeds r1, r2, ..., rn (n≥2), thus obtaining a set of data such as (r1, i1), (r2, i2), ..., (rn, in). Then, based on the n fixed currents and the corresponding rotational speeds, that is, according to formula (1), the exhaust resistance coefficient of the range hood can be calculated.

[0088] Using multiple sets of data to determine the exhaust resistance coefficient can effectively avoid errors caused by a single measurement, making the obtained exhaust resistance coefficient more accurate and better reflecting the pressure of the common flue of the range hood.

[0089] It should be understood that after the range hood is turned on, regardless of whether it is in constant torque or constant air volume mode, the resistance (exhaust resistance coefficient β) of different users' homes and different public flues is different. Therefore, the real-time current of the motor is different. So it is necessary to obtain the real-time current of the motor and determine the real-time air force coefficient of the range hood based on the real-time current and the exhaust resistance coefficient.

[0090] Since the exhaust resistance coefficient can reflect the pressure of the common flue of the range hood, and the real-time current can reflect the actual operating status of the range hood, the real-time air volume and real-time air pressure can be determined based on the exhaust resistance coefficient and the real-time current.

[0091] As one feasible approach, please refer to Figure 7 S501 can be specifically implemented as S701-S703:

[0092] S701. Determine the nominal wind force coefficient corresponding to the real-time current based on the correspondence between the real-time current and the pre-stored fixed current and the nominal wind force coefficient.

[0093] The nominal airflow coefficient includes the nominal air volume and the maximum static pressure. It should be understood that the nominal air volume is the air volume that the range hood can provide without the pressure of a shared exhaust duct. The maximum static pressure refers to the maximum pressure exerted by gas on the surface of an object parallel to the airflow. In other words, the maximum static pressure is the air pressure that the range hood can provide without the pressure of a shared exhaust duct.

[0094] The range hood has a pre-stored correspondence between fixed current and nominal wind power coefficient. In other words, when there is no pressure in the common flue, the motor can achieve a certain air volume and wind pressure by using real-time current.

[0095] As a feasible approach, when measuring the correspondence between fixed current and nominal wind force coefficient, the motor needs to operate in constant torque mode. The nominal air volume Q1, Q2, ..., QN and the maximum static pressure P1, P2, ..., PN of the range hood with fixed currents I1, I2, ..., IN (I1 < I2 < ... < IN) can be obtained through the air performance test method in the national standard GB / T17713. This yields a set of correspondences such as (I1, Q1, P1), (I2, Q2, P2), ..., (IN, QN, PN).

[0096] It should be understood that the operating modes of a motor can include constant torque mode and constant power mode. In constant torque mode, the motor's output torque remains essentially constant, while the output power varies with the speed. In constant power mode, the motor's output power remains essentially constant, and the torque decreases as the speed increases. A key characteristic of constant torque mode is that the load torque is independent of the speed; the torque remains constant or essentially constant at any speed.

[0097] Based on the pre-stored correspondence between the fixed current and the nominal wind power coefficient in the range hood, the nominal wind power coefficient corresponding to the real-time current is determined. In other words, it determines the airflow and air pressure achievable by the motor operating using the real-time current when there is no shared flue pressure.

[0098] As one feasible approach, please refer to Figure 8 S701 can be specifically implemented as S801-S802:

[0099] S801. In the correspondence between fixed current and nominal wind force coefficient, find the target fixed current that matches the real-time current.

[0100] Because the real-time current of a range hood is uncertain when operating at a fixed speed, there may not be a single fixed current that perfectly matches the real-time current in the correspondence between fixed current and nominal fan speed coefficient. Therefore, it is necessary to determine a target fixed current that matches the real-time current; that is, among multiple fixed currents, the one closest to the real-time current is selected as the target fixed current.

[0101] S802. Use the nominal wind force coefficient corresponding to the target fixed current as the nominal wind force coefficient corresponding to the real-time current.

[0102] Since the target fixed current is the fixed current that best matches the real-time current, the nominal wind force coefficient corresponding to the target fixed current can be used as the nominal wind force coefficient corresponding to the real-time current. In this way, we can obtain the nominal air volume and maximum static pressure that the real-time current is closest to, which is the air volume and static pressure that the motor can achieve when operating using the real-time current without the pressure of a common flue.

[0103] S702. Determine the real-time air volume based on the smoke exhaust resistance coefficient and the nominal wind force coefficient corresponding to the real-time current.

[0104] As a feasible approach, the real-time air volume can be determined based on the smoke exhaust resistance coefficient and the nominal wind force coefficient corresponding to the real-time current. This can be done using formula (2):

[0105] , formula (2)

[0106] Where q is the real-time air volume, β is the smoke exhaust resistance coefficient, and P n Q is the maximum static voltage corresponding to the real-time current. n This is the nominal air volume corresponding to the real-time current.

[0107] Please see Figure 9 , Figure 9 This is an airflow-pressure curve fitted based on a pre-stored correspondence between fixed current, nominal airflow, and maximum static pressure. For example... Figure 9 As shown, the airflow and air pressure curves in constant torque mode approximate a parabola. Therefore, by fitting the parabola equation, the relationship between constant current and airflow and air pressure can be obtained. Figure 9 The intersection of the x-axis and y-axis represents the nominal air volume Q, and the intersection represents the maximum static pressure P. Based on the test data, the following set of equations can be obtained:

[0108] When the current is fixed at I1: q 2 =a1*p+b1;

[0109] When the current is fixed at I2: q 2 =a²p + b²;

[0110] ...

[0111] The fixed current is I N Time: q 2 =a N *p+b N .

[0112] Where q is the air volume, p is the air pressure, and a1~a N b1~b N is the constant that needs to be solved.

[0113] Based on the parabolic equation and the known nominal air volume Q and maximum static pressure P, we can calculate: a1 = b1=Q1 2 a1= b1=Q1 2 ;……;a N = b N =Q N 2 .

[0114] Based on this, the relationship between airflow and air pressure when the range hood is operating under real-time current can be determined. For example, if the target fixed current matched with the real-time current is I3, then the corresponding relationship between airflow and air pressure is: q 2 =a3*p+b3.

[0115] Since the air pressure of a range hood is based on the pressure of the shared exhaust duct in the user's home, and the exhaust resistance coefficient can characterize the pressure of the shared exhaust duct, there is an absolute correlation between air pressure and the exhaust resistance coefficient. Furthermore, during operation, the higher the airflow of the range hood, the greater the resistance, meaning higher air pressure; conversely, the lower the airflow, the lower the resistance, meaning lower air pressure. Therefore, there is also an absolute correlation between air pressure and airflow.

[0116] In summary, wind pressure is correlated with the smoke exhaust resistance coefficient and air volume. As a feasible implementation method, the relationship between wind pressure, smoke exhaust resistance coefficient, and air volume is shown in formula (3):

[0117] , formula (3)

[0118] The relationship between wind pressure, smoke exhaust resistance coefficient, and air volume is plotted as a curve as follows: Figure 10 As shown, this is the relationship between wind pressure and air volume when the smoke exhaust resistance coefficient is β.

[0119] It is easy to understand that, Figure 9 The airflow and air pressure curves shown represent the relationship between airflow and air pressure when the motor current is the real-time current. Figure 10The air volume and air pressure curve shown represents the relationship between air pressure and air volume when the smoke exhaust resistance coefficient is β.

[0120] Based on this, please refer to Figure 11 The intersection of the two curves represents the real-time airflow and real-time air pressure when the motor operates using real-time current, under conditions of shared flue pressure. Let I be the target fixed current closest to the real-time current. n (1≤n≤N), then under real-time current, the relationship between airflow and air pressure is: q 2 =a n *p+b n Furthermore, the formula relating wind pressure, smoke exhaust resistance coefficient, and air volume is: p = β * q 2 Therefore, to calculate the real-time airflow and real-time air pressure when the motor is operating at real-time current under the condition of shared flue pressure, we need to find the solution to the following set of equations:

[0121]

[0122] Where q is the real-time air volume, p is the real-time air pressure, β is the smoke exhaust resistance coefficient, and a n b n is the constant that needs to be solved.

[0123] By calculating the above set of equations, the real-time air volume can be obtained as follows: And because a n = b n =Q n 2 Substituting an and bn into the formula yields formula (2). .

[0124] S703. Determine the real-time air pressure based on the real-time air volume and smoke exhaust resistance coefficient.

[0125] Since formula (3) is the relationship between wind pressure and air volume when the smoke exhaust resistance coefficient is β, the real-time wind pressure can be calculated according to formula (3) after the real-time air volume is calculated in S702.

[0126] S502, control the display to show the real-time wind force coefficient.

[0127] After the real-time wind force coefficient is calculated in S501, it can be sent to the display so that the display shows the real-time air volume and real-time air pressure. This allows users to intuitively know the real-time air volume and real-time air pressure when the range hood is running, and thus determine whether the range hood is working properly and whether other suitable speeds should be selected, thereby improving the user experience.

[0128] Please see Figure 12 , Figure 12 This is a schematic diagram of the display interface of a display provided in an embodiment of this application. As can be seen, the display of the range hood provided in this embodiment of the application, in addition to displaying auxiliary information such as gear and temperature, also includes an air volume window that displays real-time air volume and an air pressure window that displays real-time air pressure.

[0129] As a feasible implementation method, controlling the display to show the real-time wind force coefficient can be specifically done by: controlling the display to show the real-time air volume in the air volume window; and controlling the display to show the real-time wind pressure in the wind pressure window.

[0130] The monitor displays the real-time airflow in the airflow window and the real-time air pressure in the air pressure window. In this way, the monitor can show the real-time airflow and real-time air pressure during operation, allowing users to intuitively know the real-time airflow and real-time air pressure of the range hood.

[0131] In some embodiments, the range hood may also include a communicator, which allows a user to establish a connection with the range hood via an electronic device or the like. The range hood can then transmit real-time airflow and air pressure to the electronic device via the communicator, enabling the user to obtain the real-time airflow and air pressure of the range hood through the electronic device.

[0132] The range hood provided in this application determines its real-time airflow coefficient based on the real-time current of the motor during operation and the duct resistance coefficient. Since the duct resistance coefficient characterizes the pressure of the common duct in the environment where the range hood is located, determining the real-time airflow coefficient based on the real-time current and duct resistance coefficient allows for the determination of the airflow coefficient corresponding to the motor operating at real-time current under conditions of common duct pressure. This value is then displayed on a monitor, allowing users to intuitively understand the operating status of the range hood and significantly improving the user experience.

[0133] In some embodiments, users often need to switch the operating levels of a range hood while using it. Since the operating state of the range hood differs at each level, the corresponding real-time current is also different.

[0134] Therefore, as one feasible implementation method, please refer to Figure 13 The range hood provided in this application embodiment has a controller further configured to perform the following steps:

[0135] S1301, in response to the gear adjustment action, controls the motor to run at the adjusted gear to adjust the real-time current.

[0136] One feasible implementation method is for the user to adjust the gear level on the control panel of the range hood, and then the control panel sends the adjustment command to the controller. Another feasible implementation method is for the user to use an electronic device to send the adjustment command to the controller via a communicator. This application does not limit the scope of this implementation.

[0137] Upon receiving the gear adjustment request, the motor is controlled to operate at the adjusted gear. Because the motor's operating state changes, specifically the real-time current, the real-time wind speed coefficient of the range hood also changes, requiring recalculation.

[0138] S1302, Read the real-time current after adjustment.

[0139] S1303. Determine the adjusted real-time wind force coefficient based on the adjusted real-time current and smoke exhaust resistance coefficient.

[0140] S1304, The control display shows the real-time wind force coefficient after adjustment.

[0141] It should be understood that S1302-S1304 is the process of calculating the real-time wind force coefficient, including calculating the real-time air volume and real-time wind pressure, which is the same as the calculation process in the above embodiment, and will not be repeated here.

[0142] After adjusting the speed setting, the real-time current of the range hood changes, thus altering the real-time fan force coefficient, requiring recalculation. However, since the pressure in the common flue remains unchanged, there's no need to recalculate the flue resistance coefficient. The adjusted real-time fan force coefficient can be calculated and displayed based on the adjusted real-time current and flue resistance coefficient, allowing users to intuitively understand the range hood's current operating status.

[0143] This application also provides a control method for a range hood. Please refer to [link / reference]. Figure 14 The control methods include S1401-S1402:

[0144] S1401. Determine the real-time wind force coefficient based on the smoke exhaust resistance coefficient and the real-time current.

[0145] Among them, the real-time current is the current of the motor when it is running at the speed selected by the user, and the real-time wind force coefficient includes the real-time air volume and the real-time wind pressure.

[0146] As a feasible approach, range hoods pre-store a fixed relationship between current and nominal airflow coefficient. This means that even without shared flue pressure, the motor can achieve the nominal airflow coefficient when operating with real-time current. Please refer to [link / reference]. Figure 15 S1404 can be specifically implemented as S1501-S1503:

[0147] S1501. Determine the nominal wind force coefficient corresponding to the real-time current based on the correspondence between the real-time current and the pre-stored fixed current and the nominal wind force coefficient.

[0148] As one feasible approach, please refer to Figure 16 S1501 can be specifically implemented as follows:

[0149] S1601. In the correspondence between fixed current and nominal wind force coefficient, find the target fixed current that matches the real-time current.

[0150] Determine the target fixed current that matches the real-time current; that is, among multiple fixed currents, select the fixed current that is closest to the real-time current as the target fixed current.

[0151] S1602. Use the nominal wind force coefficient corresponding to the target fixed current as the nominal wind force coefficient corresponding to the real-time current.

[0152] In other words, the nominal airflow and maximum static pressure corresponding to the target fixed current are used as the nominal airflow and maximum static pressure corresponding to the real-time current. In this way, the nominal airflow and maximum static pressure that the real-time current can approximate can be obtained. That is, the nominal airflow and maximum static pressure that the motor can achieve when operating with the real-time current without the pressure of a common flue are obtained.

[0153] S1502. Determine the real-time air volume based on the smoke exhaust resistance coefficient and the nominal wind force coefficient corresponding to the real-time current.

[0154] As a feasible approach, the real-time air volume can be determined based on the smoke exhaust resistance coefficient and the nominal wind force coefficient corresponding to the real-time current. This can be done using formula (2):

[0155] , formula (2)

[0156] Where q is the real-time air volume, β is the smoke exhaust resistance coefficient, and P n Q is the maximum static voltage corresponding to the real-time current. n This is the nominal air volume corresponding to the real-time current.

[0157] S1503. Determine the real-time air pressure based on the real-time air volume and smoke exhaust resistance coefficient.

[0158] As a feasible approach, real-time wind pressure can be determined according to formula (3):

[0159] , formula (3)

[0160] Where p is the real-time wind pressure. q represents the smoke exhaust resistance coefficient, and q represents the real-time air volume.

[0161] S1402, Control the display to show the real-time wind force coefficient.

[0162] After the real-time wind force coefficient is calculated in S1401, it can be sent to the display so that the display shows the real-time air volume and real-time air pressure. This allows users to intuitively know the real-time air volume and real-time air pressure when the range hood is running, and thus determine whether the range hood is working properly and whether other suitable speeds should be selected, thereby improving the user experience.

[0163] The range hood control method provided in this application first determines the flue resistance coefficient of the environment in which the range hood is located by measuring the motor speed when operating at a fixed current. Then, based on the real-time current of the motor during actual operation and the flue resistance coefficient, the real-time airflow and real-time air pressure of the range hood are determined. In other words, under conditions of shared flue pressure, the airflow and air pressure corresponding to the motor operating at the real-time current are determined. These values ​​are then displayed on a monitor, allowing users to intuitively understand the operating status of the range hood and significantly improving the user experience.

[0164] In some embodiments, users often need to switch the operating levels of a range hood while using it. Since the operating state of the range hood differs at each level, the corresponding real-time current is also different.

[0165] Therefore, as one feasible implementation method, please refer to Figure 17 The control method provided in this application embodiment further includes S1701-S1704:

[0166] S1701, in response to the gear adjustment action, controls the motor to run at the adjusted gear to adjust the real-time current.

[0167] Upon receiving the gear adjustment request, the motor is controlled to operate at the adjusted gear. Because the motor's operating state changes, specifically the real-time current, the real-time wind speed coefficient of the range hood also changes, requiring recalculation.

[0168] S1702, Read the real-time current after adjustment.

[0169] S1703. Determine the adjusted real-time wind force coefficient based on the adjusted real-time current and smoke exhaust resistance coefficient.

[0170] S1704, The control display shows the real-time wind force coefficient after adjustment.

[0171] It should be understood that S1702-S1704 is the process of calculating the real-time wind force coefficient, including calculating the real-time air volume and real-time wind pressure, which is the same as the calculation process in the above embodiment, and will not be repeated here.

[0172] After adjusting the speed setting, since the pressure in the common flue of the range hood remains unchanged, there is no need to recalculate the flue resistance coefficient. The adjusted real-time airflow coefficient can be calculated and displayed based on the adjusted real-time current and flue resistance coefficient. This allows users to intuitively understand the current operating status of the range hood.

[0173] This application also provides an electronic device; please refer to [link / reference]. Figure 18 The electronic device 180 includes: one or more processors 1801; one or more memories 1802, wherein the one or more memories 1802 are used to store computer program code, the computer program code including computer instructions; when the one or more processors 1801 execute the computer instructions, the electronic device 180 performs the various steps of the method shown in the above method embodiments.

[0174] This application also provides a computer-readable storage medium storing computer instructions that, when executed on an electronic device, cause the electronic device to perform each step of the method flow shown in the above method embodiments.

[0175] This application also provides a computer program product, which includes computer instructions that, when executed on an electronic device, cause the electronic device to perform each step of the method flow shown in the above method embodiments.

[0176] In the above embodiments, implementation can be achieved, in whole or in part, through software, hardware, firmware, or any combination thereof. When implemented using software programs, implementation can be, in whole or in part, in the form of a computer program product. This computer program product includes one or more computer instructions. When these computer instructions are loaded and executed on a computer, all or part of the flow or function according to the embodiments of this application is generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, computer instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any available medium accessible to a computer or a data storage device including one or more servers, data centers, etc., that can be integrated with the medium. The available medium can be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., solid-state disk (SSD)).

[0177] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any changes or substitutions within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A range hood characterized by, The range hood comprises: a fan assembly comprising: an impeller and a motor for driving the impeller to rotate; A controller connected with the motor for controlling the operation of the motor; A display connected with the controller; The controller is configured to: Control the motor to rotate at n different fixed currents, and obtain the rotating speed of the motor under each fixed current, n is an integer greater than 1; Determine the smoke exhaust resistance coefficient according to formula 1: , Equation 1 ; wherein, is the smoke exhaust resistance coefficient, i i is the fixed current, r i is the fixed current corresponding to the rotating speed, n is an integer greater than 1; Determine the nominal wind power coefficient corresponding to the real-time current of the motor according to the corresponding relationship between the real-time current of the motor and the pre-stored fixed current and the nominal wind power coefficient; Determine the real-time air volume according to formula 2: , Equation 2; wherein q is the real-time air volume, β is the smoke exhaust resistance coefficient, P n is the maximum static pressure corresponding to the real-time current, Q n is the nominal air volume corresponding to the real-time current; Determine the real-time air pressure according to formula 3: , Equation 3; Wherein, p is the real-time air pressure, β is the smoke exhaust resistance coefficient, q is the real-time air volume; Control the display to display the real-time wind power coefficient, the real-time wind power coefficient includes: the real-time air volume and the real-time air pressure.

2. The hood according to claim 1, characterized in that The display interface of the display includes: air volume window and air pressure window; The step of controlling the display to display the real-time wind power coefficient comprises: Control the display to display the real-time air volume in the air volume window; Control the display to display the real-time air pressure in the air pressure window.

3. The hood according to any of claims 1-2, characterized in that, The controller is further configured to: In response to the action of gear adjustment, control the motor to operate at the adjusted gear, so that the real-time current changes; Read the adjusted real-time current; Determine the adjusted real-time wind power coefficient according to the adjusted real-time current and the smoke exhaust resistance coefficient; Control the display to display the adjusted real-time wind power coefficient.

4. A control method of a range hood, characterized by, The range hood comprises: a fan assembly comprising: an impeller and a motor for driving the impeller to rotate; A controller connected with the motor for controlling the operation of the motor; A display connected with the controller; The method comprises: Control the motor to rotate at n different fixed currents, and obtain the rotating speed of the motor under each fixed current, n is an integer greater than 1; Determine the smoke exhaust resistance coefficient according to formula 1: , Equation 1 ; wherein, is the smoke exhaust resistance coefficient, i i is the fixed current, r i is the rotating speed corresponding to the fixed current, n is an integer greater than 1; Determine the nominal wind power coefficient corresponding to the real-time current of the motor according to the corresponding relationship between the real-time current of the motor and the pre-stored fixed current and the nominal wind power coefficient; Determine the real-time air volume according to formula 2: , Equation 2; wherein q is the real-time air volume, β is the smoke exhaust resistance coefficient, P n is the maximum static pressure corresponding to the real-time current, Q n is the nominal air volume corresponding to the real-time current; Determine the real-time air pressure according to formula 3: , Equation 3; Wherein, p is the real-time air pressure, β is the smoke exhaust resistance coefficient, q is the real-time air volume; Control the display to display the real-time wind power coefficient, the real-time wind power coefficient includes: the real-time air volume and the real-time air pressure.

5. The control method according to claim 4, characterized by The display interface of the display includes: air volume window and air pressure window, the step of controlling the display to display the real-time wind power coefficient comprises: Control the display to display the real-time air volume in the air volume window; Control the display to display the real-time air pressure in the air pressure window.

6. The control method according to any one of claims 4-5, characterized by, The method further comprises: In response to the action of gear adjustment, control the motor to operate at the adjusted gear, so that the real-time current changes; Read the adjusted real-time current; determining an adjusted wind force coefficient according to the adjusted real-time current and the smoke exhaust resistance coefficient; controlling the display to show the adjusted wind force coefficient.

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