Range hood control method and device, household appliance and readable storage medium

Abstract

The invention discloses a range hood control method and device, a household appliance and a readable storage medium, and the method comprises the steps: obtaining the back pressure and the current exhaust air rate of a range hood, and determining the resistance coefficient of the range hood according to the back pressure and the current exhaust air rate; a backpressure air volume curve matched with the resistance coefficient is determined from preset backpressure air volume curves, and a target backpressure air volume curve is obtained; determining the current rotating speed of a fan of the range hood according to the back pressure, the current exhaust air rate and the target back pressure air rate curve; and when the noise generated by the current rotating speed is greater than a preset noise threshold value, reducing the current rotating speed to a target rotating speed or automatically reducing the current rotating speed to the target rotating speed according to a rotating speed adjusting instruction sent by a user. According to the control method, the target back pressure air volume curve is obtained through matching according to the determined resistance, the rotating speed of the draught fan when the user uses the range hood currently is determined based on the target back pressure air volume curve, different optimal rotating speeds are set for different users according to the back pressure and the exhaust air volume, and the user experience is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of range hood control, and in particular to a range hood control method, device, household appliance and readable storage medium. Background Art

[0002] With the continuous improvement of people's living standards and the increasing demand for range hoods, range hoods have become an indispensable household appliance in home kitchens. At the same time, people's performance requirements for range hoods are also constantly increasing, especially their noise performance. A low-noise range hood can bring people a pleasant mood when cooking.

[0003] In the related art, the fan speed of the range hood is low and the speed needs to be constantly and randomly adjusted to determine the speed that satisfies the user. It is impossible to effectively and quickly determine the optimal speed of the range hood fan according to the actual situation of different users to solve the noise problem of the range hood, thereby reducing the user experience. Summary of the invention

[0004] The present invention provides a range hood control method, device, household appliance and readable storage medium, which can effectively and quickly determine the optimal rotation speed of a range hood fan according to different actual situations of different users, thereby solving the noise problem of the range hood and improving user experience.

[0005] In a first aspect, the present invention provides a range hood control method, the method comprising:

[0006] Acquire the back pressure and current exhaust volume of the range hood, and determine the resistance coefficient of the range hood according to the back pressure and the current exhaust volume;

[0007] Determine a back pressure air volume curve that matches the resistance coefficient from the preset back pressure air volume curve to obtain a target back pressure air volume curve;

[0008] Determining a current rotation speed of the fan of the range hood according to the back pressure, the current exhaust air volume and the target back pressure air volume curve;

[0009] When the noise generated by the current speed is greater than a preset noise threshold, the current speed is reduced to the target speed according to a speed adjustment instruction sent by the user or the current speed is automatically reduced to the target speed.

[0010] In a second aspect, the present invention provides a range hood control device, the device comprising:

[0011] A determination module, used to obtain the back pressure and current exhaust volume of the range hood, and determine the resistance coefficient of the range hood according to the back pressure and the current exhaust volume;

[0012] A matching module, used to determine a back pressure air volume curve that matches the resistance coefficient from a preset back pressure air volume curve, and obtain a target back pressure air volume curve;

[0013] The determination module is further used to determine the current rotation speed of the fan of the range hood according to the back pressure, the current exhaust air volume and the target back pressure and air volume curve;

[0014] The reduction module is used to reduce the current speed to the target speed or automatically reduce the current speed to the target speed according to the speed adjustment instruction sent by the user when the noise generated by the current speed is greater than a preset noise threshold.

[0015] In a third aspect, the household appliance provided by the present invention includes a memory, a processor, and a computer program stored in the memory and executable on the processor, and when the processor executes the program, the range hood control method as described in any embodiment of the present invention is implemented.

[0016] In a fourth aspect, the present invention provides a computer-readable storage medium on which a computer program is stored, and when the program is executed by a processor, the range hood control method as described in any embodiment of the present invention is implemented.

[0017] The solution of the present invention obtains the back pressure and current exhaust volume of the range hood, and determines the resistance coefficient of the range hood according to the back pressure and the current exhaust volume; determines the back pressure and air volume curve that matches the resistance coefficient from the preset back pressure and air volume curve to obtain the target back pressure and air volume curve; determines the current speed of the fan of the range hood according to the back pressure, the current exhaust volume and the target back pressure and air volume curve; when the noise generated by the current speed is greater than the preset noise threshold, reduces the current speed to the target speed or automatically reduces the current speed to the target speed according to the speed adjustment instruction sent by the user. In the present invention, the size of the exhaust resistance of the range hood is determined according to the back pressure and current exhaust volume of the user's range hood, and the target back pressure and air volume curve is obtained according to the resistance size matching. The speed of the fan when the user is currently using the range hood is determined based on the target back pressure and air volume curve, and different optimal speeds are effectively set for different users according to the back pressure and exhaust volume, thereby improving the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solution of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1The present invention provides a flow diagram of a range hood control method. Figure 1 ;

[0020] Figure 2 A schematic diagram of the effect of a preset back pressure air volume curve provided by the present invention;

[0021] Figure 3 The present invention provides a flow diagram of a range hood control method. Figure 2 ;

[0022] Figure 4 It is a structural schematic diagram of the range hood control device provided by the present invention;

[0023] Figure 5 It is a structural schematic diagram of the household appliance provided by the present invention. DETAILED DESCRIPTION

[0024] In order to enable those skilled in the art to better understand the solution of the present invention, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0025] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0026] In the present invention, the technical solution can be applied to the noise reduction of household appliances, for example, the noise reduction of range hoods. In the subsequent description, the technical solution of the present invention will be described by combining the noise reduction scenario of range hoods as an example, but it should be noted that the technical solution of the present invention can be applied not only to the noise reduction of range hoods, and this is not limited here.

[0027] like Figure 1 As shown, Figure 1 The present invention provides a flow diagram of a range hood control method. Figure 1The range hood control method provided by the present invention can be executed by the range hood control device provided by the present invention, and the device can be implemented in software and / or hardware. In a specific embodiment, the device can be integrated in a home appliance, and the home appliance can be a range hood, an electric fan, etc. The following embodiments will be described by taking the range hood control device integrated in a home appliance as an example. Figure 1 The range hood control method of this embodiment may specifically include the following steps:

[0028] S101. Obtain the back pressure and current exhaust volume of the range hood, and determine the resistance coefficient of the range hood according to the back pressure and the current exhaust volume.

[0029] In this embodiment, the exhaust volume of the range hood refers to the exhaust volume of the range hood per unit time when the static pressure value is zero. Generally, the larger the exhaust volume, the faster and more timely it can exhaust a large amount of oil smoke in the kitchen. The resistance coefficient of the range hood can represent the smoke exhaust capacity of the flue of the range hood. The larger the resistance coefficient, the weaker the smoke exhaust capacity of the flue. The resistance coefficient of the range hood can be calculated by the following formula (1):

[0030] P=K×Q 2 (1)

[0031] In the above formula (1), P is the back pressure, K is the resistance coefficient, and Q is the exhaust volume.

[0032] S102, determining a back pressure air volume curve that matches the resistance coefficient from preset back pressure air volume curves to obtain a target back pressure air volume curve.

[0033] Specifically, Figure 2 As shown, Figure 2 This is a schematic diagram of the effect of a preset back pressure air volume curve provided by the present invention. Figure 2 The horizontal axis represents the air volume of the range hood, and the vertical axis represents the back pressure. The figure contains N back pressure air volume curves from curve 1 to curve N and N fan speeds. Smart 6 wind to smart 16 wind can be the air volume corresponding to the fan speed. Each back pressure air volume curve has a corresponding resistance coefficient. The resistance coefficient of the range hood is matched with the resistance coefficient of back pressure air volume curve 1 to back pressure air volume curve N to determine the successfully matched target back pressure air volume curve.

[0034] S103, determining a current rotation speed of the fan of the range hood according to the back pressure, the current exhaust air volume and the target back pressure and air volume curve.

[0035] Specifically, in Figure 2 After the target back pressure and air volume curve is determined in S101, the current speed of the fan of the range hood set by the target back pressure and air volume curve can be determined in combination with the back pressure and the current exhaust volume in S101.

[0036] For example, the resistance coefficient of the range hood is calculated using the back pressure of the range hood and the current exhaust volume, and the resistance coefficient of the range hood and Figure 2 The resistance coefficients of curves 1 to N are matched. If the resistance coefficient of curve 3 is matched successfully, curve 3 is the target back pressure air volume curve. The back pressure and current exhaust volume are Figure 2 For example, if the back pressure is 600pa and the current exhaust volume is 12m 3 / min, the intersection of these two values ​​on curve 3 is the current speed.

[0037] S104. When the noise generated by the current rotational speed is greater than a preset noise threshold, the current rotational speed is reduced to the target rotational speed according to a rotational speed adjustment instruction sent by the user or the current rotational speed is automatically reduced to the target rotational speed.

[0038] Specifically, when the fan of the range hood rotates at the current speed, if the noise generated by the range hood is greater than the preset noise threshold, the current speed can be reduced to the target speed by means of a speed adjustment instruction sent by the user, or the current speed can be reduced to the target speed by automatic adjustment of the home appliance. The noise generated by the target speed is not greater than the preset noise threshold. The user can send the speed adjustment instruction by voice, or by pressing a button, or by sending a message through the terminal, and the present invention does not limit this. If the noise generated by the range hood meets the preset noise condition, the fan of the range hood can continue to rotate at the current speed.

[0039] It can be understood that in this embodiment, the back pressure and current exhaust volume of the range hood are obtained, and the resistance coefficient of the range hood is determined according to the back pressure and the current exhaust volume; the back pressure and air volume curve matching the resistance coefficient is determined from the preset back pressure and air volume curve to obtain the target back pressure and air volume curve; the current speed of the fan of the range hood is determined according to the back pressure, the current exhaust volume and the target back pressure and air volume curve; when the noise generated by the current speed is greater than the preset noise threshold, the current speed is reduced to the target speed or the current speed is automatically reduced to the target speed according to the speed adjustment instruction sent by the user. In the present invention, the resistance of the range hood exhaust is determined according to the back pressure and the current exhaust volume of the user's range hood, and the target back pressure and air volume curve is matched in the preset multiple back pressure and air volume curves according to the resistance, and the speed of the fan when the user currently uses the range hood is determined based on the target back pressure and air volume curve, effectively setting different optimal speeds for different users according to the back pressure and exhaust volume, and when the noise generated by the optimal speed does not meet the conditions, the optimal speed is reduced to the target speed, which reduces the complexity of determining the target speed and improves the user experience.

[0040] The range hood control method provided by the present invention is further described below. Figure 3 As shown, Figure 3The present invention provides a flow diagram of a range hood control method. Figure 2 The method may specifically include the following steps:

[0041] S201, obtaining a target speed of the fan when it was last operated, and determining the target speed of the fan when it was last operated as an initial speed of the fan when it is currently operated.

[0042] S202: Control the fan to run at an initial speed and obtain the operating power.

[0043] S203. Determine the back pressure and the current exhaust volume based on the operating power and a preset matching relationship, where the preset matching relationship includes a corresponding relationship among a preset operating power, a preset back pressure, and a preset exhaust volume.

[0044] Specifically, the target speed of the last time the range hood fan was operated can be obtained from the household appliance, and the target speed can be determined as the initial speed of the fan during this operation. The motor drives the fan to operate at the initial speed, and the operating power of the motor is obtained after the operating state is stable. The currently calculated operating power is matched according to the matching relationship among the preset motor operating power, preset back pressure and preset exhaust volume, and the successfully matched back pressure and current exhaust volume are determined.

[0045] Specifically, if the user starts the range hood for the first time, the motor-driven fan can run at a preset speed, and the operating power is obtained after the operating state is stable. The currently calculated operating power is matched according to the matching relationship among the preset motor operating power, preset back pressure and preset exhaust volume, and the successfully matched back pressure and exhaust volume are determined. Finally, the target speed of the first fan rotation is determined based on the back pressure, exhaust volume and preset back pressure and air volume curve. When the user starts the range hood for the second time, the target speed of the fan of the range hood for the first time can be determined as the current speed of the fan for the second time, and whether to reduce the current speed to the target speed is determined according to the noise generated by the fan rotating at the current speed, thereby reducing the complexity of determining the target speed. Alternatively, when the user starts the range hood for the second time, taking into account the possibility of blockage in the smoke exhaust duct of the range hood, the target speed of the first fan can be determined as the initial speed of the second fan, and the motor-driven fan can rotate at the initial speed, and the operating power is calculated. The back pressure and exhaust volume of the range hood are determined based on the operating power and a preset matching relationship, and the current speed of the second fan is determined based on the back pressure, exhaust volume and preset back pressure and air volume curves. Then, according to the size of the noise value generated by the fan rotating at the current speed, it is determined whether to reduce the current speed to the target speed, thereby improving the accuracy of determining the current speed, and also improving the efficiency of determining the target speed.

[0046] S204: Determine the resistance coefficient of the range hood according to the back pressure and the current exhaust volume.

[0047] S205 . Determine a back pressure air volume curve that matches the resistance coefficient from the preset back pressure air volume curves to obtain a target back pressure air volume curve.

[0048] S206. Determine the current rotation speed of the fan of the range hood according to the back pressure, the current exhaust air volume and the target back pressure and air volume curve.

[0049] Specifically, the back pressure and the current exhaust volume are divided to obtain the resistance coefficient of the range hood, and the resistance coefficient is matched with the resistance coefficient of multiple preset back pressure air volume curves to obtain the target back pressure air volume curve. Finally, the current speed of the range hood fan is determined according to the back pressure, the current exhaust volume and the target back pressure air volume curve.

[0050] S207: When the noise generated by the current rotational speed is greater than a preset noise threshold, the current rotational speed is reduced in response to a rotational speed adjustment instruction sent by the user to obtain a reduced rotational speed.

[0051] Specifically, the fan of the range hood generates noise when rotating at the current speed. If the user feels that the volume of the generated noise is high, the user can send a speed adjustment instruction to the home appliance. The home appliance reduces the current speed of the range hood fan in response to the received speed adjustment instruction to obtain the reduced speed. Among them, the user can send the speed adjustment instruction to the home appliance by voice, or by button, or by sending information through the terminal, and the present invention does not limit it. When the user sends the speed adjustment instruction to the range hood according to the volume of the noise, the range hood can reduce the current speed to a speed that is smaller than the current speed, or reduce the current speed to a speed that is larger than the current speed according to the speed adjustment instruction, depending on the speed adjustment instruction requirements sent by the user, and the present invention does not limit it.

[0052] For example, the fan of the range hood generates noise when rotating at the current speed. If the user feels that the volume of the noise generated is high, the user can simply say to the range hood, "Xiaoyou Xiaoyou, reduce the current speed by 1 speed." Or if the user feels that the volume of the noise generated by the fan rotating at the current speed is too high, the user can say to the range hood, "Xiaoyou Xiaoyou, reduce the current speed by 3 speeds."

[0053] S208: If no speed adjustment instruction is received after a preset time, the reduced speed is determined as the target speed.

[0054] Specifically, according to the speed adjustment instruction sent by the user, the fan of the range hood rotates at a reduced speed. If the home appliance does not receive the speed adjustment instruction sent by the user after a preset time, it means that the user can accept the noise volume generated by the fan rotating at the reduced speed, and the speed will no longer be reduced, and the range hood fan continues to rotate at the reduced speed.

[0055] S209: If a speed adjustment instruction is received after a preset time, the reduced speed is further reduced until the target speed is obtained.

[0056] Specifically, if the household appliance receives a speed adjustment instruction sent by the user after a preset time, it indicates that the user does not accept the noise volume generated by the fan rotating at the reduced speed, and believes that the noise volume is still loud. The household appliance then reduces the reduced speed again in response to the received speed adjustment instruction, rotates the fan at the further reduced speed, and determines whether the generated noise meets the preset noise condition, and repeats the cycle until the target speed is obtained.

[0057] In this embodiment, there is no sequence between S208 and S209.

[0058] S210: Obtain the noise generated by the fan running at the current rotation speed.

[0059] In this embodiment, there is no sequence between S210 and S207.

[0060] S211. Determine a preset oil smoke threshold corresponding to the user's cooking type.

[0061] S212: When the noise generated by the current speed is greater than a preset noise threshold, the current speed is reduced to obtain an intermediate speed.

[0062] Specifically, in addition to adjusting the fan speed of the range hood according to the speed adjustment instruction sent by the user, the household appliance can also automatically adjust the fan speed. The user's cooking type may include steaming, stir-frying, boiling, etc. Because the fan speed required for different cooking types may be different, such as the steam generated by steaming and the oil smoke generated by stir-frying may require different fan speeds, the corresponding preset oil smoke thresholds can be determined according to different user cooking types. That is, when steaming, the oil smoke threshold corresponding to steaming is preset, and when stir-frying, the oil smoke threshold corresponding to stir-frying is preset. The preset oil smoke threshold is mainly used to determine whether the oil absorption effect of the range hood is good when the fan rotates at the speed. So specifically, after obtaining the noise generated by the fan running at the current speed, a preset noise threshold is set, and the generated noise is compared with the preset noise threshold. When the generated noise is greater than the preset noise threshold, the current speed is reduced to obtain an intermediate speed. Among them, when the current speed is reduced, a speed change value can be set, and the speed change value can be set to 1, and the current speed-1 is reduced to obtain an intermediate speed.

[0063] S213, obtaining the intermediate noise and spatial oil smoke value generated by the fan running at the intermediate speed.

[0064] S214: When the intermediate noise is not greater than a preset noise threshold and the space oil smoke value is not greater than a preset oil smoke threshold, determine the intermediate speed as the target speed.

[0065] S215: Reduce the current rotation speed to the target rotation speed.

[0066] Specifically, the spatial oil fume value is the residual oil fume value in the space after the fan rotates at the intermediate speed to absorb the kitchen oil fume. The fan is rotated at the intermediate speed to determine the intermediate noise and the spatial oil fume value. When the intermediate noise is not greater than the preset noise threshold and the spatial oil fume value is not greater than the preset oil fume threshold (the oil fume absorption effect is good at this time), the intermediate speed is determined as the target speed, and finally the current speed is reduced to the target speed. If the intermediate noise is not greater than the preset noise threshold but the spatial oil fume value is greater than the preset spatial oil fume value, in order to ensure that the user is not disturbed by noise, the current speed can be used as the target speed, or in order to ensure a good oil fume effect, the current speed can be increased until the target speed is determined, that is, when the noise generated by the range hood and the oil absorption effect of the range hood cannot be balanced, the target speed is determined according to the actual needs of the user.

[0067] It can be understood that in this embodiment, the target speed of the first fan can be determined as the initial speed of the second fan, the back pressure and exhaust volume of the range hood are determined based on the initial speed, and the current speed of the second fan is determined based on the back pressure, exhaust volume and preset back pressure and air volume curve, thereby improving the accuracy of determining the current speed and the efficiency of determining the target speed. On the one hand, when the noise generated by the fan rotating at the current speed is too large, the user can adjust the current speed by sending a speed adjustment instruction, so that the determined target speed is the optimal speed desired by the user. On the other hand, when the noise generated by the fan rotating at the current speed is too large, the target speed can also be determined by the noise of the current speed, the preset noise threshold and the user's cooking type, and the household appliance controls the current speed to be reduced to the target speed, thereby improving the user's experience.

[0068] Figure 4 FIG. 1 is a schematic diagram of a range hood control device provided by the present invention. Figure 4 As shown, the device may specifically include:

[0069] A determination module 401 is used to obtain the back pressure and current exhaust volume of the range hood, and determine the resistance coefficient of the range hood according to the back pressure and the current exhaust volume;

[0070] A matching module 402 is used to determine a back pressure air volume curve that matches the drag coefficient from the preset back pressure air volume curves to obtain a target back pressure air volume curve;

[0071] The determination module 401 is further used to determine the current rotation speed of the fan of the range hood according to the back pressure, the current exhaust air volume and the target back pressure and air volume curve;

[0072] The reduction module 403 is used to reduce the current speed to the target speed or automatically reduce the current speed to the target speed according to the speed adjustment instruction sent by the user when the noise generated by the current speed is greater than a preset noise threshold.

[0073] In one embodiment, the reducing module 403 is specifically used for:

[0074] In response to the speed adjustment instruction sent by the user, the current speed is reduced to obtain a reduced speed;

[0075] If the speed adjustment instruction is not received after a preset time, the reduced speed is determined as the target speed;

[0076] If the speed adjustment instruction is received after the preset time, the reduced speed is further reduced until the target speed is obtained.

[0077] In one embodiment, the determination module 401, before reducing the current speed to the target speed, is specifically configured to:

[0078] Acquire the noise generated by the fan running at the current speed;

[0079] The target rotation speed is determined based on the noise, the preset noise threshold, and a user's cooking type.

[0080] In one embodiment, the determination module 401 is specifically configured to:

[0081] Determine a preset oil smoke threshold corresponding to the user's cooking type;

[0082] When the noise is greater than the preset noise threshold, the target speed is determined based on the preset oil smoke threshold.

[0083] In one embodiment, the determination module 401 is specifically configured to:

[0084] Reducing the current speed to obtain an intermediate speed;

[0085] Obtaining the intermediate noise and air fume value generated by the fan running at the intermediate speed;

[0086] When the intermediate noise is not greater than the preset noise threshold and the spatial oil smoke value is not greater than the preset oil smoke threshold, the intermediate speed is determined as the target speed.

[0087] In one embodiment, the determination module 401 is specifically configured to:

[0088] Obtaining a target speed when the fan was last operated, and determining the target speed when the fan was last operated as the current speed when the fan is currently operated;

[0089] The fan is controlled to run at the current speed during this operation, and the back pressure and current exhaust volume of the range hood are obtained.

[0090] In one embodiment, the determination module 401 is specifically configured to:

[0091] Controlling the fan to operate at the current speed during this operation and obtaining the operating power;

[0092] The back pressure and the current exhaust volume are determined based on the operating power and a preset matching relationship, wherein the preset matching relationship includes a corresponding relationship among a preset operating power, a preset back pressure, and a preset exhaust volume.

[0093] In the device of the present invention, the back pressure and current exhaust volume of the range hood can be obtained, and the resistance coefficient of the range hood can be determined according to the back pressure and the current exhaust volume; the back pressure volume curve that matches the resistance coefficient is determined from the preset back pressure volume curve to obtain the target back pressure volume curve; the current speed of the fan of the range hood is determined according to the back pressure, the current exhaust volume and the target back pressure volume curve; when the noise generated by the current speed is greater than the preset noise threshold, the current speed is reduced to the target speed or the current speed is automatically reduced to the target speed according to the speed adjustment instruction sent by the user. In the present invention, the size of the exhaust resistance of the range hood is determined according to the back pressure and the current exhaust volume of the user's range hood, the target back pressure volume curve is obtained according to the resistance size matching, and the speed of the fan when the user is currently using the range hood is determined based on the target back pressure volume curve, which effectively sets different optimal speeds for different users according to the back pressure and exhaust volume, thereby improving the user experience.

[0094] The present invention also provides a household appliance, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, the range hood control method provided in any of the above embodiments is implemented.

[0095] The present invention further provides a computer-readable medium on which a computer program is stored. When the program is executed by a processor, the range hood control method provided by any of the above embodiments is implemented.

[0096] Reference below Figure 5 , which shows a schematic diagram of the structure of a computer system 500 suitable for implementing the household appliance of the present invention. Figure 5 The household electrical appliance shown is only an example and should not bring any limitation to the function and scope of use of the present invention.

[0097] like Figure 5 As shown, the computer system 500 includes a central processing unit (CPU) 501, which can perform various appropriate actions and processes according to a program stored in a read-only memory (ROM) 502 or a program loaded from a storage part 508 into a random access memory (RAM) 503. In the RAM 503, various programs and data required for the operation of the computer system 500 are also stored. The CPU 501, the ROM 502, and the RAM 503 are connected to each other via a bus 504. An input / output (I / O) interface 505 is also connected to the bus 504.

[0098] The following components are connected to the I / O interface 505: an input section 506 including a keyboard, a mouse, etc.; an output section 507 including a cathode ray tube (CRT), a liquid crystal display (LCD), etc., and a speaker, etc.; a storage section 508 including a hard disk, etc.; and a communication section 509 including a network interface card such as a LAN card, a modem, etc. The communication section 509 performs communication processing via a network such as the Internet. A drive 510 is also connected to the I / O interface 505 as needed. A removable medium 511, such as a magnetic disk, an optical disk, a magneto-optical disk, a semiconductor memory, etc., is installed on the drive 510 as needed, so that a computer program read therefrom is installed into the storage section 508 as needed.

[0099] In particular, according to the embodiments disclosed in the present invention, the process described above with reference to the flowchart can be implemented as a computer software program. For example, the embodiments disclosed in the present invention include a computer program product, which includes a computer program carried on a computer-readable medium, and the computer program includes a program code for executing the method shown in the flowchart. In such an embodiment, the computer program can be downloaded and installed from the network through the communication part 509, and / or installed from the removable medium 511. When the computer program is executed by the central processing unit (CPU) 501, the above-mentioned functions defined in the system of the present invention are executed.

[0100] It should be noted that the computer-readable medium shown in the present invention may be a computer-readable signal medium or a computer-readable storage medium or any combination of the above two. The computer-readable storage medium may be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device or device, or any combination of the above. More specific examples of computer-readable storage media may include, but are not limited to: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In the present invention, a computer-readable storage medium may be any tangible medium containing or storing a program that can be used by or in combination with an instruction execution system, device or device. In the present invention, a computer-readable signal medium may include a data signal propagated in a baseband or as part of a carrier wave, which carries a computer-readable program code. This propagated data signal may take a variety of forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination of the above. The computer-readable signal medium may also be any computer-readable medium other than a computer-readable storage medium, which may send, propagate or transmit a program for use by or in conjunction with an instruction execution system, apparatus or device. The program code contained on the computer-readable medium may be transmitted using any appropriate medium, including but not limited to: wireless, wire, optical cable, RF, etc., or any suitable combination of the above.

[0101] The flow chart and block diagram in the accompanying drawings illustrate the possible architecture, function and operation of the system, method and computer program product according to various embodiments of the present invention. In this regard, each box in the flow chart or block diagram can represent a module, a program segment, or a part of a code, and the above-mentioned module, program segment, or a part of a code contains one or more executable instructions for realizing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the box can also occur in a different order from the order marked in the accompanying drawings. For example, two boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the block diagram or flow chart, and the combination of the boxes in the block diagram or flow chart can be implemented with a dedicated hardware-based system that performs a specified function or operation, or can be implemented with a combination of dedicated hardware and computer instructions.

[0102] The modules and / or units involved in the description of the present invention may be implemented by software or hardware. The modules and / or units described may also be set in a processor, for example, it may be described as: a processor includes a power determination module, a matching module and a reduction module. The names of these modules do not constitute limitations on the modules themselves in some cases.

[0103] As another aspect, the present invention further provides a computer-readable medium, which may be included in the device described in the above embodiment; or may exist independently without being assembled into the device. The above computer-readable medium carries one or more programs, and when the above one or more programs are executed by a device, the device includes:

[0104] Acquire the back pressure and current exhaust volume of the range hood, and determine the resistance coefficient of the range hood according to the back pressure and the current exhaust volume;

[0105] Determine a back pressure air volume curve that matches the resistance coefficient from the preset back pressure air volume curve to obtain a target back pressure air volume curve;

[0106] Determining a current rotation speed of the fan of the range hood according to the back pressure, the current exhaust air volume and the target back pressure air volume curve;

[0107] When the noise generated by the current speed is greater than a preset noise threshold, the current speed is reduced to the target speed according to a speed adjustment instruction sent by the user or the current speed is automatically reduced to the target speed.

[0108] The solution of the present invention obtains the back pressure and current exhaust volume of the range hood, and determines the resistance coefficient of the range hood according to the back pressure and the current exhaust volume; determines the back pressure and air volume curve that matches the resistance coefficient from the preset back pressure and air volume curve to obtain the target back pressure and air volume curve; determines the current speed of the fan of the range hood according to the back pressure, the current exhaust volume and the target back pressure and air volume curve; when the noise generated by the current speed is greater than the preset noise threshold, reduces the current speed to the target speed or automatically reduces the current speed to the target speed according to the speed adjustment instruction sent by the user. In the present invention, the size of the exhaust resistance of the range hood is determined according to the back pressure and current exhaust volume of the user's range hood, and the target back pressure and air volume curve is obtained according to the resistance size matching. The speed of the fan when the user is currently using the range hood is determined based on the target back pressure and air volume curve, and different optimal speeds are effectively set for different users according to the back pressure and exhaust volume, thereby improving the user experience.

[0109] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps described in the present invention can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solution of the present invention can be achieved, and this document does not limit this.

[0110] It should be noted that the collection, collection, updating, analysis, processing, use, transmission, storage and other aspects of user personal information involved in the technical solution of this disclosure are in compliance with the provisions of relevant laws and regulations, are used for legitimate purposes, and do not violate public order and good morals. Necessary measures are taken for user personal information to prevent illegal access to user personal information data and maintain the security of user personal information, network security and national security.

[0111] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions may occur depending on design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A range hood control method, characterized in that: The method comprises: Acquire the back pressure and current exhaust volume of the range hood, and determine the resistance coefficient of the range hood according to the back pressure and the current exhaust volume; Determine a back pressure air volume curve that matches the resistance coefficient from the preset back pressure air volume curve to obtain a target back pressure air volume curve; Determining a current rotation speed of the fan of the range hood according to the back pressure, the current exhaust air volume and the target back pressure air volume curve; When the noise generated by the current speed is greater than a preset noise threshold, the current speed is reduced to the target speed according to a speed adjustment instruction sent by the user or the current speed is automatically reduced to the target speed.

2. The method according to claim 1, characterized in that The step of reducing the current speed to a target speed according to the speed adjustment instruction sent by the user includes: In response to the speed adjustment instruction sent by the user, the current speed is reduced to obtain a reduced speed; If the speed adjustment instruction is not received after a preset time, the reduced speed is determined as the target speed; If the speed adjustment instruction is received after the preset time, the reduced speed is further reduced until the target speed is obtained.

3. The method according to claim 1, characterized in that Before automatically reducing the current rotation speed to the target rotation speed, the method further includes: Acquire the noise generated by the fan running at the current speed; The target rotation speed is determined based on the noise, the preset noise threshold, and a user's cooking type.

4. The method according to claim 3, characterized in that The determining the target rotation speed based on the noise, the preset noise threshold and the user's cooking type includes: Determine a preset oil smoke threshold corresponding to the user's cooking type; When the noise is greater than the preset noise threshold, the target speed is determined based on the preset oil smoke threshold.

5. The method according to claim 4, characterized in that The determining the target speed based on the preset oil smoke threshold comprises: Reducing the current speed to obtain an intermediate speed; Obtaining the intermediate noise and air fume value generated by the fan running at the intermediate speed; When the intermediate noise is not greater than the preset noise threshold and the spatial oil smoke value is not greater than the preset oil smoke threshold, the intermediate speed is determined as the target speed.

6. The method according to claim 1, characterized in that The obtaining of the back pressure and current exhaust volume of the range hood includes: Obtaining a target speed of the fan when it was last operated, and determining the target speed of the fan when it was last operated as the initial speed of the fan when it is currently operated; The fan is controlled to run at the initial speed, and the back pressure and current exhaust volume of the range hood are obtained.

7. The method according to claim 6, characterized in that The controlling the fan to operate at the initial speed and obtaining the back pressure and current exhaust volume of the range hood includes: Controlling the fan to operate at the initial speed and obtaining operating power; The back pressure and the current exhaust volume are determined based on the operating power and a preset matching relationship, wherein the preset matching relationship includes a corresponding relationship among a preset operating power, a preset back pressure, and a preset exhaust volume.

8. A range hood control device, characterized in that: The device comprises: A determination module, used to obtain the back pressure and current exhaust volume of the range hood, and determine the resistance coefficient of the range hood according to the back pressure and the current exhaust volume; A matching module, used to determine a back pressure air volume curve that matches the resistance coefficient from a preset back pressure air volume curve, and obtain a target back pressure air volume curve; The determination module is further used to determine the current rotation speed of the fan of the range hood according to the back pressure, the current exhaust air volume and the target back pressure and air volume curve; The reduction module is used to reduce the current speed to the target speed or automatically reduce the current speed to the target speed according to the speed adjustment instruction sent by the user when the noise generated by the current speed is greater than a preset noise threshold.

9. A household appliance comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein: When the processor executes the program, the range hood control method as described in any one of claims 1 to 7 is implemented.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the range hood control method as claimed in any one of claims 1 to 7 is implemented.

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