Range hood purification control method, device and range hood equipment

Abstract

The present application relates to a purification control method, device and range hood equipment for a range hood. When a startup instruction is obtained, a startup signal is sent to the blower system of the range hood, and the startup signal is used to control the blower system to suck in cooking fumes. Then, a purification instruction is sent to the purification device, and the purification instruction is used to control the purification device to purify the fumes sucked in by the blower system. The purification device is arranged in the range hood. When a shutdown instruction is obtained, a self-cleaning instruction is sent to the purification device, and the self-cleaning instruction is used to control the purification device to remove grease. The blower system can suck in cooking fumes, reducing the impact of cooking fumes on users. The purification device can purify the fumes sucked in by the blower system, reducing air pollution caused by direct discharge of fumes from the range hood. After the range hood is shut down, a self-cleaning instruction can also be sent to the purification device to enable the purification device to remove grease, which is beneficial to maintaining the clean state of the purification device, improving the working performance of the purification device, and improving the use reliability of the range hood.

Description

Technical Field

[0001] This application relates to the technical field of range hoods, and particularly to a range hood purification control method, device and range hood equipment. Background Art

[0002] A range hood is a kitchen appliance for purifying the kitchen environment. It is installed above the kitchen stove and can quickly extract the waste generated by the stove combustion and the harmful cooking fumes to the human body during the cooking process, discharge them outdoors, and at the same time condense and collect the cooking fumes to reduce pollution, purify the air, and has the safety guarantee functions of preventing poisoning and explosion. It is widely used in people's daily lives.

[0003] However, there are more than 300 kinds of volatile organic compounds in kitchen fumes, which is one of the important sources of air pollution. The fume condensates at high temperatures have strong carcinogenic and mutagenic effects. Therefore, the traditional range hood directly collects and discharges the cooking fumes into the air, which will not only affect environmental protection, but also affect people's physical health. Therefore, the traditional range hood is unreliable in use. Summary of the Invention

[0004] In view of the problem of the unreliable use of traditional range hoods, the present invention provides a range hood purification control method, device and range hood equipment, which can achieve the technical effect of improving the reliability of range hood use.

[0005] A range hood purification control method includes the following steps:

[0006] When a startup instruction is obtained, a startup signal is sent to the fan system of the range hood; the startup signal is used to control the fan system to absorb cooking fumes;

[0007] A purification instruction is sent to the purification device; the purification instruction is used to control the purification device to purify the cooking fumes absorbed by the fan system, and the purification device is arranged in the range hood;

[0008] When a shutdown instruction is obtained, a self-cleaning instruction is sent to the purification device; the self-cleaning instruction is used to control the purification device to remove grease.

[0009] A range hood purification control device includes an instruction acquisition device, a controller and a purification device arranged in the range hood. The instruction acquisition device and the purification device are both connected to the controller. The instruction acquisition device is used to receive a startup instruction and / or a shutdown instruction and send the received instruction to the controller. The purification device is used to purify the cooking fumes absorbed by the fan system of the range hood, and the controller is used to perform range hood purification control according to the above method.

[0010] An oil fume machine device, comprising an oil fume machine and the above-mentioned oil fume purification control device, wherein the oil fume purification control device is arranged on the oil fume machine.

[0011] For the above-mentioned oil fume purification control method, device and oil fume machine device, when a startup instruction is obtained, a startup signal is sent to the fan system of the oil fume machine. The startup signal is used to control the fan system to suck cooking oil fume, and then a purification instruction is sent to the purification device. The purification instruction is used to control the purification device to purify the oil fume sucked by the fan system. The purification device is arranged on the oil fume machine. When a shutdown instruction is obtained, a self-cleaning instruction is sent to the purification device. The self-cleaning instruction is used to control the purification device to remove grease. The fan system can suck cooking oil fume, reducing the impact on users caused by cooking oil fume. The purification device can purify the oil fume sucked by the fan system, reducing air pollution caused by the direct discharge of oil fume from the oil fume machine. After the oil fume machine is shut down, a self-cleaning instruction can also be sent to the purification device, enabling the purification device to remove grease, which is beneficial to maintaining the clean state of the purification device, improving the working performance of the purification device, and enhancing the use reliability of the oil fume machine.

[0012] In one embodiment, the purification device includes a generating electrode, a collecting electrode and an auxiliary motor. The generating electrode is arranged at the upper air inlet of the oil fume machine, the collecting electrode is arranged at the lower air outlet of the oil fume machine, and the collecting electrode is arranged on the shaft of the auxiliary motor. When a shutdown instruction is obtained, sending a self-cleaning instruction to the purification device includes:

[0013] When a shutdown instruction is obtained, a first rotation instruction is sent to the auxiliary motor; the first rotation instruction is used to control the auxiliary motor to drive the collecting electrode to rotate, so that the collecting electrode throws off grease.

[0014] In one embodiment, before sending the rotation instruction to the auxiliary motor, it further includes: disconnecting the power supply of the collecting electrode.

[0015] In one embodiment, after sending a self-cleaning instruction to the purification device when a shutdown instruction is obtained, it further includes:

[0016] When a shutdown instruction is obtained, a self-cleaning instruction is sent to the fan system, and the self-cleaning instruction is also used to control the fan system to throw off grease.

[0017] In one embodiment, the fan system includes a main motor, a wind wheel and a volute. The main motor and the wind wheel are arranged in the volute, and the wind wheel is arranged on the main motor. When a shutdown instruction is obtained, sending a self-cleaning instruction to the fan system includes:

[0018] After receiving the shutdown instruction, send a second rotation instruction to the main motor. The second rotation instruction is used to control the main motor to drive the wind wheel to rotate and fling off the grease.

[0019] In one embodiment, sending the purification instruction to the purification device includes: when the fan system starts and reaches a preset startup delay duration, sending the purification instruction to the purification device.

[0020] In one embodiment, after sending the purification instruction to the purification device, it further includes:

[0021] Obtain the gas concentration after passing through the purification device;

[0022] Send a feedback adjustment signal to the purification device according to the relationship between the gas concentration and a preset concentration threshold; the feedback adjustment signal is used to adjust the working intensity of the purification device.

[0023] In one embodiment, the purification device includes a generating electrode, a collecting electrode, and an auxiliary motor. The generating electrode is arranged at the upper air inlet of the range hood, the collecting electrode is arranged at the lower air outlet of the range hood, the collecting electrode is arranged on the shaft of the auxiliary motor, and the generating electrode, the collecting electrode, and the auxiliary motor are all connected to the controller.

[0024] In one embodiment, the range hood purification control device further includes a concentration detection device, and the concentration detection device is connected to the controller.

[0025] In one embodiment, the range hood includes a main motor, a wind wheel, and a volute. The main motor and the wind wheel are arranged inside the volute, the wind wheel is arranged on the main motor, and the main motor is connected to the controller.

[0026] In one embodiment, the range hood further includes a diversion member and a grease collection member. The diversion member is used to centrally transport the grease removed by the purification device to the grease collection member. Description of the Drawings

[0027] Figure 1 It is a flowchart of the range hood purification control method in one embodiment;

[0028] Figure 2 It is a flowchart of the range hood purification control method in another embodiment;

[0029] Figure 3 It is a flowchart of the range hood purification control method in yet another embodiment;

[0030] Figure 4 It is a flowchart of the range hood purification control method in still another embodiment;

[0031] Figure 5 Structural diagram of an oil fume machine device in an embodiment;

[0032] Figure 6 Schematic structural diagram of an oil fume machine device in an embodiment;

[0033] Figure 7 Schematic structural diagram of the generating electrode of a purification device in an embodiment;

[0034] Figure 8 Schematic structural diagram of the collecting electrode of a purification device in an embodiment;

[0035] Figure 9 Schematic diagram of the working principle of a purification device in an embodiment;

[0036] Figure 10 Detailed flowchart of an oil fume purification control method in an embodiment. Specific implementation manners

[0037] In order to make the objectives, technical solutions and advantages of the present application clearer and more understandable, the present application will be described more comprehensively below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0038] In one embodiment, please refer to Figure 1 , a method for controlling the purification of an oil fume machine is provided. The method for controlling the purification of the oil fume machine can be executed by a controller. The controller can use the control chip originally existing in the oil fume machine and add corresponding functions to the original control chip to implement the method for controlling the purification of the oil fume machine of the present application, which can save hardware costs. Alternatively, a controller independent of the original oil fume machine can also be used. By executing the steps of the method for controlling the purification of the oil fume machine of the present application through this controller, it will not affect the original functions of the oil fume machine, and can also cooperate with the control chip originally possessed by the oil fume machine. Their work does not interfere with each other, improving the accuracy of the work. The method for controlling the purification of the oil fume machine includes the following steps:

[0039] Step S200: When a start-up instruction is obtained, send a start signal to the fan system of the oil fume machine.

[0040] The device for obtaining the start-up instruction is an instruction obtaining device. The instruction obtaining device is connected to the controller and sends the obtained start-up instruction to the controller. The instruction obtaining device is usually arranged on the outer shell of the oil fume machine. The type of the instruction obtaining device is not unique. For example, it can be a button, which is simple to operate, or a voice recognition device or a gesture recognition device, etc., with high convenience in use. No specific limitation is made here.

[0041] After the controller receives the power-on instruction and considering that the user needs to start the range hood, the controller sends a start signal to the fan system 21 of the range hood. Among them, the start signal is used to control the fan system 21 to absorb cooking fumes. The structure of the fan system 21 is not unique. In this embodiment, the fan system 21 includes a main motor 211, a wind wheel 212 and a volute. The main motor 211 and the wind wheel 212 are arranged in the volute. The wind wheel 212 is arranged on the main motor 211, and the main motor 211 is connected to the controller. The controller sends the start signal to the main motor 211. After receiving the start signal, the main motor 211 drives the wind wheel 212 to rotate, generating negative pressure to absorb cooking fumes. The range hood usually also includes a smoke collecting hood assembly 22. The smoke collecting hood assembly 22 is generally arranged in the area of the range hood closest to the stove for collecting fumes and is used in conjunction with the fan system 21 to absorb the fumes generated during stove combustion and cooking. The specific shape and size of the smoke collecting hood assembly 22 can be designed according to actual needs as long as those skilled in the art think it can be achieved.

[0042] Step S400: Send a purification instruction to the purification device.

[0043] Among them, the purification instruction is used to control the purification device 12 to purify the fumes absorbed by the fan system 21. The purification device 12 is arranged in the range hood. After the fan system 21 is started, the fan system 21 has already started to absorb cooking fumes. At this time, a purification instruction is sent to the purification device 12 to control the purification device 12 to start working and purify the fumes absorbed by the fan system 21. It can be understood that the purification device 12 can purify the fumes before entering the fan system 21, or it can also purify the fumes after passing through the fan system 21. According to the different structures and types of the purification device 12, the process of the purification device 12 purifying fumes is also different. In this embodiment, taking the purification device 12 as an electrostatic purification device 12, and the electrostatic purification device 12 includes a generating electrode 122 and a collecting electrode 123 as an example, the generating electrode 122 is arranged at the upper air inlet of the range hood, and the collecting electrode 123 is arranged at the lower air outlet of the range hood. The controller is connected to the generating electrode 122 and the collecting electrode 123. The controller sending the purification instruction to the purification device 12 can be that the controller energizes the generating electrode and the collecting electrode 123 of the purification device 12.

[0044] Specifically, when the purification device 12 is working, the fume first reaches the discharge electrode 122 and then reaches the collecting electrode 123. Among them, the discharge electrode 122 is connected to high-voltage electricity (generally, high-voltage electricity of 7-9 KV is used). Taking the purification device 12 arranged at the air inlet of the range hood as an example, when the fume enters from the air inlet and passes through the discharge electrode 122 of the purification device 12, the ions and electrons in the gas are accelerated under the action of the strong electric field near the discharge electrode. In this way, the ions or electrons have enough kinetic energy to collide with gas molecules and ionize them, thereby generating more ions and electrons, forming a corona discharge area. Under the corona effect of the high-voltage electric field, after the dusty air flow enters the corona discharge area, electric charges are generated on the dust particles.

[0045] Generally, the collecting electrode 123 is connected to low-voltage electricity, so that opposite electricity is generated on the collecting electrode 123. The principle of "opposite charges attract" is used to adsorb the charged particles, and a voltage of 3-4 KV can generally be connected. The electric property of the collecting electrode 123 and the electric property of the charged particulate matter are opposite to each other. Therefore, they attract each other under the action of the electric field Coulomb force, so the charged particles are adsorbed. The Coulomb force is the electric field force acting between two charges. In a vacuum, the magnitude of the mutual force between two stationary point charges Q1 and Q2 is proportional to the product of Q1 and Q2, and inversely proportional to the square of the distance r between them. The direction of the force is along their connection line. Like charges repel each other, and opposite charges attract each other. It can be understood that in other embodiments, the purification device 12 may also include other structures as long as those skilled in the art think it can be realized.

[0046] Step S600: When a shutdown instruction is obtained, send a self-cleaning instruction to the purification device.

[0047] The device for obtaining the shutdown instruction is an instruction acquisition device. The instruction acquisition device is connected to the controller and sends the obtained shutdown instruction to the controller. The instruction acquisition device is usually arranged on the outer shell of the range hood. The type of the instruction acquisition device is not unique. For example, it can be a button, which is simple to operate, or a voice recognition device or a gesture recognition device, etc., with high usability. No specific limitation is made here. After the controller obtains the shutdown instruction and considering that the cooking is over, it can turn off the range hood. At this time, the controller sends a self-cleaning instruction to the purification device 12. The self-cleaning instruction is used to control the purification device 12 to remove grease, so that the purification device 12 can remove the grease attached during the working process and realize the self-cleaning of the purification device 12. The method for the purification device 12 to remove grease is not unique. Generally, the purification device 12 contains rotatable devices. When the purification device 12 receives the self-cleaning instruction, the devices start to rotate, and the grease particles attached to the rotating devices are thrown off under the action of centrifugal force, realizing the self-cleaning of the purification device 12, further ensuring the working performance of the purification device 12, improving the purification ability of the purification device 12, and thus improving the use reliability of the range hood. It can be understood that in other embodiments, the purification device 12 can also remove the attached grease by vibration or other means as long as those skilled in the art think it can be achieved.

[0048] Extendably, after obtaining the shutdown instruction, it is judged whether delayed shutdown is required according to the shutdown instruction. If so, the subsequent steps are executed, that is, steps such as S600 are executed. If delayed shutdown is not required, the range hood can be directly shut down. At this time, the subsequent self-cleaning actions are not executed. In this way, it can be directly shut down when cleaning is not required, thus better meeting the user's needs.

[0049] In one embodiment, the purification device 12 includes a generating electrode 122, a collecting electrode 123 and an auxiliary motor 121. The generating electrode 122 is arranged at the upper air inlet of the range hood, the collecting electrode 123 is arranged at the lower air outlet of the range hood, and the collecting electrode 123 is arranged on the shaft of the auxiliary motor 121. Please refer to Figure 3 , step S600 includes step S620.

[0050] Step S620: After obtaining the shutdown instruction, send a first rotation instruction to the auxiliary motor.

[0051] In this embodiment, the purification device 12 includes a generating electrode 122, a collecting electrode 123, and an auxiliary motor 121. The generating electrode 122 is disposed at the upper air inlet of the range hood, and the collecting electrode 123 is disposed at the lower air outlet of the range hood, which means that the generating electrode 122 and the collecting electrode 123 are arranged along the wind direction of the range hood. The cooking fume first reaches the generating electrode 122 and then reaches the collecting electrode 123. The collecting electrode 123 is disposed on the shaft of the auxiliary motor 121. When the purification device 12 operates, the generating electrode 122 is connected to high-voltage electricity, and the collecting electrode 123 is connected to low-voltage electricity. When the cooking fume enters from the air inlet and passes through the generating electrode 122 of the purification device 12, under the corona effect of the high-voltage electric field, the cooking fume air is ionized to generate charges, and the charges collide with oil particles and dust to make them charged. The particles with accumulated charges are adsorbed on the collecting electrode 123 of the purification device 12 under the action of the Coulomb force when passing through the collecting electrode 123, so that the particles in the cooking fume are separated, realizing the purification of the cooking fume. After the purified cooking fume passes through the air duct system, it is discharged into the common flue or outdoors through the check valve and the smoke pipe. Extendably, when the range hood is in the working state, the collecting electrode 123 on the purification device 12 is connected to the low-voltage power supply and rotates at a low speed along with the motor shaft of the auxiliary motor 121 to improve the adsorption capacity for charged particles. It can be understood that the low-speed operation here means that the rotation speed of the motor is relatively low, generally lower than the rotation speed of the lowest gear of the range hood.

[0052] After the controller obtains the shutdown instruction and considering that the cooking is over, the range hood can be turned off. At this time, the controller sends a first rotation instruction to the auxiliary motor 121, and the first rotation instruction is used to control the auxiliary motor 121 to drive the collecting electrode 123 to rotate, so that the collecting electrode 123 throws off the grease. After the auxiliary motor 121 receives the first rotation instruction, it drives the collecting electrode 123 to rotate, and the grease attached to the collecting electrode 123 is thrown off under the action of the centrifugal force, so as to keep the collecting electrode 123 in a clean state. Extendably, a guiding member and a grease collecting member are further provided on the range hood. The guiding member can be a guiding plate, which is arranged at intervals around the collecting electrode 123 and fixed on the range hood. A grease collecting member is arranged at one end of the guiding plate close to the ground, and the grease collecting member can be an oil cup. The grease thrown off by the collecting electrode 123 converges on the guiding plate and flows into the oil cup under the guiding and gravity actions of the guiding plate, so that the oil cup completes the collection of the grease generated by the cleaning. Further, the first rotation instruction can also be used to control the auxiliary motor 121 to drive the collecting electrode 123 to rotate at an ultra-high speed to improve the purification capacity of the purification device 12. It can be understood that the ultra-high speed here is defined relative to the gear rotation speed during the normal operation of the range hood, and the ultra-high speed can be defined as higher than the rotation speed of the stir-fry gear.

[0053] In one embodiment, in step S620, before sending the rotation instruction to the auxiliary motor 121, it further includes: disconnecting the power supply of the collecting electrode 123.

[0054] After receiving the shutdown instruction, considering that the cooking is completed and there is no need for the range hood to absorb cooking fumes, the power supply of the collecting electrode 123 is disconnected at this time, so that the collecting electrode 123 loses the function of electrostatic adsorption and no longer purifies the fumes, saving energy consumption. Further, disconnecting the power supply of the collecting electrode 123 before sending the rotation instruction to the collecting electrode 123 can prevent the collecting electrode 123 from rotating while charged, improving the safety of the operation of the collecting electrode 123.

[0055] In one embodiment, please refer to Figure 2 , after step S600, the range hood purification control method further includes step S800.

[0056] Step S800: After receiving the shutdown instruction, send a self-cleaning instruction to the fan system.

[0057] Among them, the self-cleaning instruction is also used to control the fan system 21 to throw off grease. It can be understood that step S800 can be executed after step S600 or can be executed simultaneously with step S600. The device for obtaining the shutdown instruction is an instruction obtaining device, and the instruction obtaining device is connected to the controller and sends the obtained shutdown instruction to the controller. The instruction obtaining device is usually arranged on the outer shell of the range hood, and the type of the instruction obtaining device is not unique. For example, it can be a button, which is simple to operate, or a voice recognition device or a gesture recognition device, etc., with high usability, and is not specifically limited here. After the controller receives the shutdown instruction and considering that the cooking is over, the range hood can be turned off. At this time, the controller sends a self-cleaning instruction to the fan system 21, and the self-cleaning instruction is also used to control the fan system 21 to throw off grease, which can make the fan system 21 throw off the grease attached during the working process, realizing the self-cleaning of the fan system 21. The method for the fan system 21 to throw off grease is not unique. Generally, the fan system 21 includes devices that can rotate. When the fan system 21 receives the self-cleaning instruction, the devices start to rotate, and the grease particles attached to the rotating devices are thrown off under the action of centrifugal force, realizing the self-cleaning of the fan system 21, further ensuring the working performance of the fan system 21, and thus improving the reliability of use of the range hood.

[0058] In one embodiment, the fan system 21 includes a main motor 211, a wind wheel 212 and a volute. The main motor 211 and the wind wheel 212 are arranged in the volute, and the wind wheel 212 is arranged on the main motor 211. Please refer to Figure 3 , step S800 includes step S820.

[0059] Step S820: After receiving the shutdown instruction, send a second rotation instruction to the main motor.

[0060] In this embodiment, the fan system 21 includes a main motor 211, a wind wheel 212 and a volute. The main motor 211 and the wind wheel 212 are arranged inside the volute, and the wind wheel 212 is arranged on the main motor 211. During cooking, the range hood fan system 21 operates, the main motor 211 drives the wind wheel 212 to rotate, generating negative pressure inside the volute, thereby sucking in cooking fumes. After the controller receives the shutdown command and considering that cooking is over, the range hood can be turned off. At this time, the controller sends a second rotation command to the main motor 211, and the second rotation command is used to control the main motor 211 to drive the wind wheel 212 to rotate and fling off grease. After the main motor 211 receives the second rotation command, it drives the wind wheel 212 to rotate, and the grease attached to the wind wheel 212 is flung off under the action of centrifugal force, thereby keeping the wind wheel 212 in a clean state. Extensibly, a deflector and a grease collection member are also provided on the range hood. The deflector can be a deflector plate, which is arranged at intervals around the wind wheel 212 and fixed on the range hood. A grease collection member is provided at one end of the deflector plate close to the ground, and the grease collection member can be an oil cup. The grease flung off by the wind wheel 212 converges on the deflector plate and flows into the oil cup under the guidance and gravity of the deflector plate, enabling the oil cup to complete the collection of the grease generated by cleaning. Further, the second rotation command can also be used to control the main motor 211 to drive the wind wheel 212 to rotate at an ultra-high speed to improve the purification ability of the fan system 21. It can be understood that the ultra-high speed here is defined relative to the gear speed during the normal operation of the range hood, and the ultra-high speed can be defined as a speed higher than the stir-fry gear speed.

[0061] In one embodiment, please refer to Figure 3 , step S400 includes step S420.

[0062] Step S420: After the fan system starts and reaches a preset start delay duration, send a purification command to the purification device.

[0063] After the fan system 21 starts, the fan system 21 has already started to suck in cooking fumes. After the fan system 21 starts and reaches the preset start delay duration, the fan system 21 has sucked in a certain amount of fumes. At this time, sending a purification command to the purification device 12 to control the purification device 12 to start working can save the energy consumption of the purification device 12 to a certain extent. The specific duration of the preset start delay duration is not unique. In this embodiment, the preset start delay duration is 5 s. At this time, the fan system 21 has just started working for a short time, which is beneficial to ensuring the purification effect of the purification device 12. It can be understood that in other embodiments, the preset start delay duration can also be other values as long as those skilled in the art think it can be achieved.

[0064] In one embodiment, please refer to Figure 4 , after step S400, steps S520 and S540 are further included.

[0065] Step S520: Obtain the gas concentration after passing through the purification device.

[0066] After the purification device 12 starts to work and purifies the oil fume, obtain the gas concentration after passing through the purification device 12. The detected gas concentration value can be used as one of the bases for evaluating the purification effect of the purification device 12. It can be understood that step S520 does not necessarily have to be executed after step S400, and it can be executed as long as the purification device 12 starts to work. The method of obtaining the gas concentration is not unique. In this embodiment, the gas concentration can be detected by a concentration detection device. The concentration detection device is arranged behind the purification device 12 and is used to detect the gas concentration after passing through the purification device 12. The concentration detection device is also connected to the controller and is used to send the detected gas concentration to the controller for subsequent processing. The type of the concentration detection device is not unique. For example, it can be a PM2.5 detection module, etc.

[0067] Step S540: Send a feedback adjustment signal to the purification device according to the relationship between the gas concentration and the preset concentration threshold.

[0068] After the controller obtains the gas concentration, it compares the gas concentration with the preset concentration threshold and sends a feedback adjustment signal to the purification device 12 according to the relationship between the gas concentration and the preset concentration threshold. Among them, the feedback adjustment signal is used to adjust the working intensity of the purification device 12. Specifically, when the gas concentration is greater than the preset concentration threshold, it is considered that the current gas concentration is too high and the purification effect of the purification device 12 is not good. At this time, a feedback adjustment signal for increasing the working intensity of the purification device 12 is sent, such as increasing the input voltage transmitted to the purification device 12 to improve the purification ability of the purification device 12 to more comprehensively purify the inhaled oil fume. If the preset concentration threshold includes an upper concentration limit value and a lower concentration limit value, when the gas concentration is less than the lower concentration limit value, it is considered that the current gas concentration is small and the purification effect of the purification device 12 is good. At this time, a feedback adjustment signal for reducing the working intensity of the purification device 12 is sent, such as reducing the input voltage transmitted to the purification device 12, which can appropriately reduce the working intensity of the purification device 12 to play a role in saving energy.

[0069] The above-mentioned purification control method for the range hood, when receiving a startup instruction, sends a startup signal to the fan system 21 of the range hood. The startup signal is used to control the fan system 21 to suck in cooking fumes. Then, a purification instruction is sent to the purification device 12. The purification instruction is used to control the purification device 12 to purify the cooking fumes sucked in by the fan system 21. The purification device 12 is arranged in the range hood. When receiving a shutdown instruction, a self-cleaning instruction is sent to the purification device 12. The self-cleaning instruction is used to control the purification device 12 to remove grease. The fan system 21 can suck in cooking fumes, reducing the impact on users caused by cooking fumes. The purification device 12 can purify the cooking fumes sucked in by the fan system 21, reducing air pollution caused by the direct discharge of cooking fumes from the range hood. After the range hood is shut down, a self-cleaning instruction can also be sent to the purification device 12, enabling the purification device 12 to remove grease, which is beneficial to maintaining the clean state of the purification device 12, improving the working performance of the purification device 12, and enhancing the reliability of the range hood in use.

[0070] In one embodiment, please refer to Figures 5 - 6 , a purification control device for a range hood is provided, including an instruction acquisition device, a controller, and a purification device 12 arranged in the range hood. The instruction acquisition device and the purification device 12 are both connected to the controller. The instruction acquisition device is used to receive a startup instruction and / or a shutdown instruction, and send the received instruction to the controller. The purification device 12 is used to purify the cooking fumes sucked in by the fan system 21 of the range hood. The controller is used to perform range hood purification control according to the above method. It should be noted that due to the limitations of the drawings, the controller and the instruction acquisition device are not shown in the figure, but their installation positions can also be known according to the written description.

[0071] Specifically, the instruction acquisition device is connected to the controller and sends the acquired startup instruction and / or shutdown instruction to the controller. The instruction acquisition device is usually arranged on the outer shell of the range hood. The type of the instruction acquisition device is not unique. For example, it can be a button, which is simple to operate, or a voice recognition device or a gesture recognition device, etc., with high usability. No specific limitation is made here.

[0072] In one embodiment, please refer to Figure 6 , the purification device 12 includes a generating electrode 122, a collecting electrode 123, and an auxiliary motor 121. The generating electrode 122 is arranged at the upper air inlet of the range hood, the collecting electrode 123 is arranged at the lower air outlet of the range hood, the collecting electrode 123 is arranged on the shaft of the auxiliary motor 121, and the generating electrode 122, the collecting electrode 123, and the auxiliary motor 121 are all connected to the controller.

[0073] Specifically, please refer to Figure 9, when the purification device 12 is working, the cooking fume first reaches the discharge electrode 122 and then reaches the collecting electrode 123. Among them, the discharge electrode 122 is connected to high-voltage electricity (generally 7-9 KV high-voltage electricity). Taking the purification device 12 arranged at the air inlet of the range hood as an example, when the cooking fume enters from the air inlet and passes through the discharge electrode 122 of the purification device 12, the ions and electrons in the gas are accelerated under the action of the strong electric field near the discharge electrode. In this way, the ions or electrons have enough kinetic energy to collide with gas molecules and ionize them, thereby generating more ions and electrons and forming a corona discharge area. Under the corona effect of the high-voltage electric field, after the dusty air flow enters the corona discharge area, charges are generated on the dust particles.

[0074] Generally, the collecting electrode 123 is connected to low-voltage electricity, so that opposite electricity is generated on the collecting electrode 123, and the principle of "opposite charges attract" is used to adsorb the charged particles, and generally a voltage of 3-4 KV can be connected. The electric property of the collecting electrode 123 and the electric property of the charged particulate matter are opposite to each other. Therefore, they attract each other under the action of the electric field Coulomb force, so the charged particles are adsorbed. The Coulomb force is the electric field force acting between two charges. In a vacuum, the magnitude of the mutual force between two stationary point charges Q1 and Q2 is proportional to the product of Q1 and Q2, and inversely proportional to the square of the distance r between them. The direction of the force is along their connection line. Like charges repel each other, and opposite charges attract each other. It can be understood that in other embodiments, the purification device 12 may also include other structures as long as those skilled in the art think it can be achieved.

[0075] In addition, the layout shape of the electrode wire of the discharge electrode 122 is not unique. In Figure 7 , a radial balanced electrode wire is adopted. It can be understood that in other embodiments, the electrode wire of the discharge electrode 122 can also be a wavy electrode wire, a mesh electrode wire or an axial arrangement, etc., as long as those skilled in the art think it can be achieved.

[0076] In one embodiment, the purification device 12 is arranged at the air inlet or the air outlet of the range hood.

[0077] The purification device 12 can be arranged at the air inlet of the range hood, and the range hood absorbs the purified cooking fume, reducing the impact of the cooking fume on the internal components of the range hood. Or, the purification device 12 can also be arranged at the air outlet of the range hood to purify the cooking fume inhaled by the range hood and then process it, reducing the impact of the cooking fume on air pollution.

[0078] In one embodiment, the purification control device of the range hood further includes a concentration detection device, which is connected to the controller. The concentration detection device is arranged behind the purification device 12 and is used to detect the gas concentration after passing through the purification device 12. The concentration detection device is also connected to the controller and is used to send the detected gas concentration to the controller for subsequent processing. The type of the concentration detection device is not unique. For example, it can be a PM2.5 detection module, etc. The concentration detection device is used to detect the air quality of the purified cooking fume and serves as a basis for adjusting the working state of the purification device 12, such as increasing the ionization voltage, etc.

[0079] For the above-mentioned purification control device of the range hood, when a startup instruction is obtained, a startup signal is sent to the fan system 21 of the range hood. The startup signal is used to control the fan system 21 to suck in cooking fume, and then a purification instruction is sent to the purification device 12. The purification instruction is used to control the purification device 12 to purify the cooking fume sucked in by the fan system 21. The purification device 12 is arranged in the range hood. After obtaining a shutdown instruction, a self-cleaning instruction is sent to the purification device 12. The self-cleaning instruction is used to control the purification device 12 to remove grease. The fan system 21 can suck in cooking fume and reduce the impact on users caused by cooking fume. The purification device 12 can purify the cooking fume sucked in by the fan system 21 and reduce the air pollution caused by the direct discharge of cooking fume from the range hood. After the range hood is shut down, a self-cleaning instruction can also be sent to the purification device 12 to make the purification device 12 remove grease, which is beneficial to maintaining the clean state of the purification device 12, improving the working performance of the purification device 12, and improving the reliability of use of the range hood.

[0080] In one embodiment, a range hood device is provided, which includes a range hood and the above-mentioned purification control device of the range hood. The purification control device of the range hood is arranged in the range hood.

[0081] In one embodiment, please refer to Figures 5 - 6 , the range hood includes a main motor 211, a wind wheel 212 and a volute. The main motor 211 and the wind wheel 212 are arranged in the volute. The wind wheel 212 is arranged on the main motor 211, and the main motor 211 is connected to the controller. The fan system 21 of the range hood includes a main motor 211, a wind wheel 212 and a volute. The main motor 211 and the wind wheel 212 are arranged in the volute. The wind wheel 212 is arranged on the main motor 211, and the main motor 211 is connected to the controller. The controller sends a startup signal to the main motor 211. After receiving the startup signal, the main motor 211 drives the wind wheel 212 to rotate, generating negative pressure to suck in cooking fume.

[0082] In one embodiment, the range hood further includes a diversion member and a grease collection member. The diversion member is used to centrally transmit the grease removed by the purification device 12 to the grease collection member.

[0083] Specifically, the flow guiding member can be a flow guiding plate, which is arranged at intervals around the collecting electrode 123 and / or the wind wheel 212 without contacting the collecting electrode 123 and the wind wheel 212. The flow guiding plate is fixed on the range hood, and an oil collecting member is arranged at one end of the flow guiding plate close to the ground. The oil collecting member can be an oil cup. The oil thrown out by the collecting electrode 123 and / or the wind wheel 212 converges on the flow guiding plate and flows into the oil cup under the guiding and gravity actions of the flow guiding plate, so that the oil cup completes the collection of the oil generated by cleaning.

[0084] To better understand the above embodiments, the following will be explained in detail with a specific embodiment. In one embodiment, please refer to Figures 5 - 6 , the range hood device includes a fan system 21 for sucking in cooking fumes and a purification device 12 for purifying and separating cooking fumes. Among them, the fan system 21 is also called the air duct system, including a main motor 211 and a wind wheel 212. The purification device 12 includes a generating electrode 122 for ionizing cooking fumes, a collecting electrode 123 for collecting oil and particulate matter, and an auxiliary motor 121. The structure of the generating electrode 122 can be referred to Figure 7 , and the structure of the collecting electrode 123 can be referred to Figure 8 . The layout shape of the electrode wires of the generating electrode 122 is not unique either. In Figure 7 , a radial balanced electrode wire is adopted. It can be understood that in other embodiments, the electrode wires of the generating electrode 122 can also be wavy electrode wires, mesh electrode wires or axially arranged, etc., as long as those skilled in the art think it can be realized. The main motor 211 and the wind wheel 212 are installed inside the volute and combined into the fan system 21. The purification device 12 is installed at the air inlet of the air duct system. Among them, the collecting electrode 123 is installed on the shaft of the auxiliary motor 121 and installed between the generating electrode 122 and the volute.

[0085] Please refer to Figure 10 , during cooking, the range hood fan system 21 operates, the main motor 211 drives the wind wheel 212 to rotate, generating negative pressure to suck in cooking fumes, and the purification device 12 is started. At this time, the generating electrode 122 is connected to high-voltage electricity, and the collecting electrode 123 is connected to low-voltage electricity. When the cooking fumes enter through the air inlet and pass through the generating electrode 122 of the purification device 12, under the corona effect of the high-voltage electric field, the cooking fume air is ionized to generate charges, and the charges collide with the oil and particulate matter and dust to make them charged. The particulate matter with accumulated charges is adsorbed on the collecting electrode 123 of the purification device 12 under the action of the Coulomb force when passing through the collecting electrode 123, so that the particulate matter in the cooking fumes is separated, realizing the purification of cooking fumes. The purified cooking fumes pass through the air duct system and are discharged to the common flue or outdoors through the check valve and the smoke pipe.

[0086] When the range hood is in the working state, the collecting electrode 123 on the purification device 12 is connected to the low-voltage power supply and rotates at a low speed following the motor shaft of the auxiliary motor 121 to improve the adsorption capacity for charged particulate matter.

[0087] When the range hood receives the user's shutdown instruction, the range hood enters the delayed shutdown state. At this time, the controller issues a self-cleaning instruction, the collecting electrode 123 of the purification device 12 is powered off, and the main motor 211 and the auxiliary motor 121 enter the high-speed operation in the self-cleaning mode. Due to the loss of the electrostatic adsorption force, the grease particles and the like attached to the collecting electrode 123 and the impeller 212 are thrown off under the action of the high-speed centrifugal force, and then flow into the oil cup through the diversion plate and other diversion devices, so as to keep the collecting electrode 123 and the blades of the impeller 212 in a clean state. Optionally, a PM2.5 detection module and the like can also be added to detect the air quality of the purified cooking fume and adjust the working state of the purification device 12, such as increasing the ionization voltage and the like.

[0088] By installing the ionization purification device 12 on the range hood, the cooking fume is purified during the cooking process, the overall oil separation degree is improved, the emission of oil particles is reduced, the air quality is enhanced, and after use, the purification device 12 and the inner cavity of the range hood air duct are cleaned through the self-cleaning system to ensure the performance of the range hood. During cooking, the fan of the range hood operates at a high speed to suck in the generated cooking fume, and the purification device 12 ionizes and purifies the cooking fume entering from the air inlet, and adsorbs the charged particles, so as to achieve the purification of the cooking fume, improve the overall oil separation degree of the range hood, and improve the quality of the exhausted air. After cooking, the self-cleaning system is started, the main motor 211 and the auxiliary motor 121 rotate at an ultra-high speed, driving the impeller 212 and the collecting electrode 123 of the purification device 12 to rotate, and the grease particles attached to the collecting electrode 123 and the blades of the impeller 212 are thrown off under the action of the high-speed centrifugal force, so as to achieve the self-cleaning effect.

[0089] For the above range hood device, when the start-up instruction is obtained, a start signal is sent to the fan system 21 of the range hood. The start signal is used to control the fan system 21 to suck in the cooking fume, and then a purification instruction is sent to the purification device 12. The purification instruction is used to control the purification device 12 to purify the cooking fume sucked in by the fan system 21. The purification device 12 is arranged on the range hood. When the shutdown instruction is obtained, a self-cleaning instruction is sent to the purification device 12. The self-cleaning instruction is used to control the purification device 12 to remove the grease. The fan system 21 can suck in the cooking fume and reduce the influence of the cooking fume on the user. The purification device 12 can purify the cooking fume sucked in by the fan system 21 and reduce the air pollution caused by the direct discharge of the cooking fume from the range hood. After the range hood is shut down, a self-cleaning instruction can also be sent to the purification device 12 to make the purification device 12 remove the grease, which is beneficial to keeping the purification device 12 in a clean state, improving the working performance of the purification device 12, and improving the use reliability of the range hood.

[0090] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0091] The above-described embodiments merely represent several implementation manners of the present invention. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the appended claims.

Claims

1. An oil fume purifier control method, characterized in that It includes the following steps: When a boot instruction is obtained, send a start signal to the fan system of the range hood; the start signal is used to control the fan system to absorb cooking fumes; Send a purification instruction to the purification device; the purification instruction is used to control the purification device to purify the fumes absorbed by the fan system, and the purification device is arranged on the range hood; the purification device includes a generating electrode, a collecting electrode and an auxiliary motor, the generating electrode is arranged at the upper air inlet of the range hood, the collecting electrode is arranged at the lower air outlet of the range hood, and the collecting electrode is arranged on the shaft of the auxiliary motor; When a shutdown instruction is obtained, send a self-cleaning instruction to the purification device; the self-cleaning instruction is used to control the purification device to remove grease; Wherein, when the range hood is in a working state, the collecting electrode on the purification device is connected to a low-voltage power supply and rotates at a low speed along with the motor shaft of the auxiliary motor.

2. The purification control method of the range hood according to claim 1, wherein The step of sending a self-cleaning instruction to the purification device when a shutdown instruction is obtained includes: When a shutdown instruction is obtained, send a first rotation instruction to the auxiliary motor; the first rotation instruction is used to control the auxiliary motor to drive the collecting electrode to rotate, so that the collecting electrode throws off grease.

3. The oil fume purifying control method according to claim 2, wherein Before sending the rotation instruction to the auxiliary motor, it further includes: Disconnect the power supply of the collecting electrode.

4. The purification control method of the range hood according to claim 1, wherein, After sending a self-cleaning instruction to the purification device when a shutdown instruction is obtained, it further includes: When a shutdown instruction is obtained, send a self-cleaning instruction to the fan system, and the self-cleaning instruction is also used to control the fan system to throw off grease.

5. The purification control method of the range hood according to claim 4, wherein, The fan system includes a main motor, a wind wheel and a volute, the main motor and the wind wheel are arranged in the volute, the wind wheel is arranged on the main motor, and the step of sending a self-cleaning instruction to the fan system when a shutdown instruction is obtained includes: When a shutdown instruction is obtained, send a second rotation instruction to the main motor, and the second rotation instruction is used to control the main motor to drive the wind wheel to rotate and throw off grease.

6. The purification control method of the range hood according to claim 1, wherein The step of sending a purification instruction to the purification device includes: When the fan system starts and reaches a preset start delay duration, send a purification instruction to the purification device.

7. The purification control method of the range hood according to claim 1, wherein, After sending a purification instruction to the purification device, it further includes: Obtain the gas concentration after passing through the purification device; Send a feedback adjustment signal to the purification device according to the relationship between the gas concentration and a preset concentration threshold; the feedback adjustment signal is used to adjust the working intensity of the purification device.

8. An oil fume purifying control device, characterized in that, It includes an instruction acquisition device, a controller and a purification device arranged on the range hood, the instruction acquisition device and the purification device are both connected to the controller, the purification device includes a generating electrode, a collecting electrode and an auxiliary motor, the generating electrode is arranged at the upper air inlet of the range hood, the collecting electrode is arranged at the lower air outlet of the range hood, and the collecting electrode is arranged on the shaft of the auxiliary motor; The instruction acquisition device is used to receive a boot instruction and / or a shutdown instruction, and send the received instruction to the controller, the purification device is used to purify the fumes absorbed by the fan system of the range hood, and the controller is used to control the purification of the range hood according to the method according to any one of claims 1-7.

9. The purification control device for a range hood according to claim 8, wherein The anode, the collector, and the auxiliary motor are all connected to the controller.

10. The purification control device of the range hood according to claim 8, characterized in that, It further includes a concentration detection device, and the concentration detection device is connected to the controller.

11. An oil fume machine device, characterized in that, It includes an oil fume machine and the oil fume purification control device according to any one of claims 8-10, and the oil fume purification control device is arranged in the oil fume machine.

12. The range hood device according to claim 11, characterized in that, The oil fume machine includes a main motor, a wind wheel, and a volute. The main motor and the wind wheel are arranged in the volute. The wind wheel is arranged on the main motor, and the main motor is connected to the controller.

13. The range hood device according to claim 11, wherein, The oil fume machine further includes a flow guiding member and an oil grease collecting member. The flow guiding member is used for centrally transporting the oil grease removed by the purification device to the oil grease collecting member.

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