Range hood and control method thereof

Abstract

The present invention relates to a range hood and a control method thereof. The range hood comprises a housing, a driving fan and a fume treatment mechanism, wherein the fume treatment mechanism comprises a filter fan, a first filter element and a second filter element. The driving fan is arranged in an air duct of the housing, and the fume treatment mechanism is arranged in the air duct and is located between the driving fan and the air inlet. When the fume is sucked, the driving fan is started so that the fume enters the air duct from the air inlet. The filter fan of the fume treatment mechanism is started so that the fume can be sucked into the filter fan from the suction port after being filtered by the first filter element, and discharged from the exhaust port through the second filter element. The driving fan further discharges the fume that has passed through the fume treatment mechanism through the air outlet. Since the fume is filtered by the first filter element and the second filter element of the fume treatment mechanism before being discharged from the air outlet through the driving fan, the pollutants in the fume are effectively filtered, thereby reducing the pollution of the fume discharged from the air outlet to the outdoor environment.

Description

Technical Field

[0001] The present invention relates to the technical field of kitchen appliances, and in particular to a range hood and a control method thereof. Background Art

[0002] With the development of economy and technology, range hoods are widely used as kitchen appliances in people's daily lives, and the problem of oil smoke polluting the indoor and outdoor environment has attracted more and more attention. Traditional range hoods absorb oil smoke through fans and separate oil droplets by the speed of the fan. However, traditional range hoods have poor filtering effects, resulting in oil smoke being discharged outdoors, causing pollution. Summary of the invention

[0003] Aiming at the problem of poor oil fume separation effect, the present invention proposes a range hood and a control method thereof, wherein the range hood can improve the oil fume filtering effect, thereby achieving the technical effect of reducing pollution to the outdoor environment.

[0004] A range hood, comprising:

[0005] A casing, wherein an air duct is formed in the casing, and an air inlet and an air outlet respectively connected to the air duct are formed on the casing;

[0006] A driving fan, the driving fan being disposed in the air duct, and the driving fan being used to provide power to make the oil smoke flow from the air inlet to the air outlet; and

[0007] An oil fume treatment mechanism is arranged in the air duct and is located between the driving fan and the air inlet. The oil fume treatment mechanism includes a filter fan, a first filter element and a second filter element. The filter fan is formed with an air inlet and an air outlet. The air inlet is connected to the air inlet, and the air outlet corresponds to the driving fan. The first filter element is arranged at the air inlet and covers the air inlet. The second filter element is arranged at the air outlet and covers the air outlet.

[0008] In one embodiment, there is a distance between the oil fume treatment mechanism and the inner wall of the air duct, and the filter fan is electrically connected in parallel with the drive fan; or

[0009] The filter fan is electrically connected in series with the drive fan.

[0010] In one embodiment, the number of the oil fume treatment mechanisms is at least two, and the different oil fume treatment mechanisms are all arranged in the air duct and located between the driving fan and the air inlet. The exhaust outlet of the filter fan of one oil fume treatment mechanism is connected to the air inlet of the filter fan of another adjacent oil fume treatment mechanism.

[0011] In one embodiment, the range hood further comprises an air duct, one end of the air duct is connected to an exhaust port of one of the oil fume treatment mechanisms, and the other end of the air duct is connected to an air inlet of another adjacent oil fume treatment mechanism.

[0012] In one embodiment, the first filter element includes a first filter net, and the first filter net is arranged at the air inlet and covers the air inlet.

[0013] In one embodiment, the first filter element further includes a first adsorption layer, the first adsorption layer and the first filter screen are stacked, and the first adsorption layer is located on a side of the first filter screen facing the filter fan.

[0014] In one embodiment, the second filter element includes a second adsorption layer, and the second adsorption layer is arranged at the air outlet and covers the air outlet.

[0015] In one embodiment, the second filter element further includes a second filter screen, the second filter layer and the second adsorption layer are stacked, and the second filter layer is arranged on a side of the second adsorption layer facing away from the filter fan.

[0016] In one embodiment, the first filter element is detachably disposed at the air inlet; and / or

[0017] The second filter element is detachably arranged at the air outlet.

[0018] In one embodiment, the filter fan is a centrifugal fan.

[0019] In one embodiment, the oil fume treatment mechanism includes a mounting shell, the filter fan is arranged in the mounting shell, the filter fan is arranged in the mounting shell, the mounting shell is installed on the inner wall of the casing, and the mounting shell is provided with a first opening connected to the air inlet and a second opening connected to the air outlet.

[0020] In one of the embodiments, the range hood further comprises a lifting mechanism, the oil fume treatment mechanism is arranged on the lifting mechanism and is located in the air duct, and the lifting mechanism is used to drive the oil fume treatment mechanism to move between the driving fan and the air inlet.

[0021] In one embodiment, the range hood further includes a controller, and the filter fan and the drive fan are electrically connected to the controller respectively.

[0022] In one of the embodiments, the range hood further comprises a check valve, which is arranged at the air outlet, and the flow direction allowed by the check valve is the direction in which the air outlet is away from the air inlet.

[0023] When the above-mentioned range hood is in use, the driving fan is arranged in the air duct of the casing, and the oil fume treatment mechanism is arranged in the air duct and is located between the driving fan and the air inlet. When it is necessary to extract the oil fume, the driving fan is started, and the driving fan is used to provide power for the flow of the oil fume, so that the oil fume can enter the air duct from the air inlet. The filter fan of the oil fume treatment mechanism is further started, so that the oil fume entering the air duct can be sucked into the filter fan through the suction port after being filtered by the first filter element, and discharged from the exhaust port through the second filter element. The driving fan can further discharge the oil fume passing through the oil fume treatment mechanism through the air outlet. Because the oil fume is filtered by the first filter element and the second filter element of the oil fume treatment mechanism before being discharged from the air outlet through the driving fan, the pollutants in the oil fume are effectively filtered, thereby reducing the pollution of the oil fume discharged from the air outlet to the outdoor environment. At the same time, since the driving fan and the filtering fan can absorb oil smoke at the same time, the efficiency of sucking oil smoke can be improved, the efficiency of capturing oil smoke can be improved, and the pollution of oil smoke to the kitchen environment can be reduced.

[0024] 14. The control method of a range hood as claimed in claim 13, wherein the range hood comprises a casing, a driving fan and an oil fume treatment mechanism, wherein an air duct is formed in the casing, and an air inlet and an air outlet respectively connected to the air duct are formed on the casing; the driving fan is arranged in the air duct, and the driving fan is used to provide power to make the oil fume flow from the air inlet to the air outlet; the oil fume treatment mechanism is arranged in the air duct and is located between the driving fan and the air inlet, and the oil fume treatment mechanism comprises a filter fan, a first filter element and a second filter element, the filter fan is formed with an air inlet and an air outlet, the air inlet is connected to the air inlet, and the air outlet corresponds to the driving fan, the first filter element is arranged at the air inlet and covers the air inlet, and the second filter element is arranged at the air outlet and covers the air outlet; there is a distance between the oil fume treatment mechanism and the inner wall of the air duct, and the filter fan is electrically connected in parallel with the driving fan;

[0025] The control method comprises:

[0026] Get the start signal;

[0027] Starting the driving fan according to the starting signal;

[0028] Obtaining oil fume processing signal;

[0029] The filter fan is started according to the oil fume processing signal.

[0030] In one embodiment, before the step of starting the filter fan according to the oil fume processing signal, the step further includes:

[0031] Get the set time;

[0032] The filter fan is started to work for the set time according to the oil fume processing signal.

[0033] The control method of the range hood described above, when it is necessary to extract oil fume, the drive fan is started after obtaining the start signal, and the drive fan is used to provide power for the flow of oil fume, so that the oil fume enters the air duct from the air inlet. According to the use requirements, the oil fume treatment is triggered, and then the filter fan of the oil fume treatment mechanism is started after obtaining the oil fume treatment signal, so that the oil fume entering the air duct can be sucked into the filter fan from the suction port after being filtered by the first filter element, and discharged from the exhaust port through the second filter element. The drive fan can further discharge the oil fume passing through the oil fume treatment mechanism through the air outlet. Because the oil fume is filtered by the first filter element and the second filter element of the oil fume treatment mechanism before being discharged from the air outlet through the drive fan, the pollutants in the oil fume are effectively filtered, thereby reducing the pollution of the oil fume discharged from the air outlet to the outdoor environment. At the same time, because the drive fan and the filter fan can absorb oil fume at the same time, the efficiency of extracting oil fume can be improved, the efficiency of capturing oil fume can be improved, and the pollution of oil fume to the kitchen environment can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0036] In addition, the drawings are not drawn to a 1:1 scale, and the relative sizes of the various elements are drawn only as examples in the drawings and are not necessarily drawn according to the true scale.

[0037] Figure 1 is a schematic structural diagram of a range hood in one embodiment;

[0038] Figure 2 for Figure 1 A cross-sectional view of the oil fume treatment mechanism in FIG.

[0039] Figure 3 for Figure 2The oil fume treatment mechanism in the structure diagram omits the installation shell;

[0040] Figure 4 The figure is a schematic structural diagram of a control panel of a range hood according to an embodiment.

[0041] Description of reference numerals:

[0042] 10. Range hood, 100. Casing, 110. Air duct, 120. Air inlet, 130. Air outlet, 200. Driving fan, 210. Driving motor, 220. Driving fan blade, 230. Driving volute, 300. Oil fume treatment mechanism, 310. Filtering fan, 311. Air inlet, 312. Air outlet, 313. Filtering motor, 314. Filtering fan blade, 315. Filtering volute, 320. First filter element, 330. Second filter element, 340. Mounting shell, 342. Heat dissipation port, 350. Mounting bracket, 400. Air duct, 500. Check valve, 600. Oil net, 700. Oil cup, 800. Control panel, 810. Start button, 820. Oil fume treatment button, 830. Timer, 840. Filtering start button, 850. Alarm, 860. Stop button. DETAILED DESCRIPTION

[0043] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0044] See also Figure 1 and Figure 2 The range hood 10 in one embodiment of the present invention can at least improve the filtration efficiency of oil smoke and reduce the pollution to the air. Specifically, the range hood 10 includes a housing 100, a driving fan 200 and an oil smoke treatment mechanism 300.

[0045] The housing 100 is provided with an air duct 110, and the housing 100 is provided with an air inlet 120 and an air outlet 130 respectively connected to the air duct 110; the driving fan 200 is provided in the air duct 110, and the driving fan 200 is used to provide power to make the oil smoke flow from the air inlet 120 to the air outlet 130; the oil smoke treatment mechanism 300 is provided in the air duct 110 and is located between the driving fan 200 and the air inlet 120, and the oil smoke treatment mechanism 300 is provided in the air duct 110 and is located between the driving fan 200 and the air inlet 120. The management mechanism 300 includes a filter fan 310, a first filter element 320 and a second filter element 330. The filter fan 310 is formed with an air inlet 311 and an air outlet 312. The air inlet 311 is connected to the air inlet 120, and the air outlet 312 corresponds to the driving fan 200. The first filter element 320 is arranged at the air inlet 311 and covers the air inlet 311. The second filter element 330 is arranged at the air outlet 312 and covers the air outlet 312.

[0046] When the range hood 10 is in use, the driving fan 200 is arranged in the air duct 110 of the housing 100, and the oil fume treatment mechanism 300 is arranged in the air duct 110 and is located between the driving fan 200 and the air inlet 120. When it is necessary to extract oil fume, the driving fan 200 is started, and the driving fan 200 is used to provide power for the flow of oil fume, so that the oil fume enters the air duct 110 from the air inlet 120. The filter fan 310 of the oil fume treatment mechanism 300 is further started, so that the oil fume entering the air duct 110 can be sucked into the filter fan 310 through the suction port after being filtered by the first filter element 320, and discharged from the exhaust port 312 through the second filter element 330. The driving fan 200 can further discharge the oil fume passing through the oil fume treatment mechanism 300 through the air outlet 130. Because the oil smoke is filtered by the first filter element 320 and the second filter element 330 of the oil smoke treatment mechanism 300 before being discharged from the air outlet 130 through the driving fan 200, pollutants in the oil smoke are effectively filtered, thereby reducing the degree of pollution to the outdoor environment by the oil smoke discharged from the air outlet 130. At the same time, because the driving fan 200 and the filtering fan 310 can absorb the oil smoke at the same time, the efficiency of sucking the oil smoke can be improved, the efficiency of capturing the oil smoke can be improved, and the pollution of the kitchen environment by the oil smoke can be reduced.

[0047] In one embodiment, there is a gap between the oil fume treatment mechanism 300 and the inner wall of the air duct 110, and the filter fan 310 is electrically connected in parallel with the drive fan 200. Since there is a gap between the oil fume treatment mechanism 300 and the inner wall of the air duct 110, if only the drive fan 200 is started without starting the oil fume treatment mechanism 300, the oil fume can also enter the drive fan 200 through the gap between the oil fume treatment mechanism 300 and the inner wall of the air duct 110, and the drive fan 200 discharges the oil fume through the air outlet 130. By electrically connecting the filter fan 310 and the drive fan 200 in parallel, it is convenient to provide users with multiple options, and they can choose to start or not start the oil fume treatment mechanism 300 according to the usage situation, thereby improving the applicability of use.

[0048] In another embodiment, the filter fan 310 is electrically connected in series with the drive fan 200. When the filter fan 310 and the drive fan 200 are in the startup state, the filter fan 310 and the drive fan 200 can be started and operated at the same time, so as to effectively filter the oil smoke during use. Alternatively, the filter fan 310 and the drive fan 200 are electrically connected in parallel, so that when the filter fan 310 and the drive fan 200 are in the startup state, the filter fan 310 and the drive fan 200 can be started and operated at the same time.

[0049] Specifically, there is no gap between the oil fume treatment mechanism 300 and the inner wall of the air duct 110, so that the oil fume entering the driving fan 200 is first filtered by the oil fume treatment mechanism 300, further improving the stability of filtering the oil fume. In another embodiment, the oil fume treatment mechanism 300 can also be connected to the driving fan 200 through an air duct, so that the filtered oil fume discharged by the oil fume treatment mechanism 300 enters the driving fan 200 along the air duct, and is discharged to the outside through the air outlet 130 by the driving fan 200.

[0050] In one embodiment, the range hood 10 further includes a controller, and the filter fan 310 and the drive fan 200 are electrically connected to the controller respectively. By providing a controller, it is convenient to control the operating states of the filter fan 310 and the drive fan 200.

[0051] In one embodiment, the number of the oil fume treatment mechanisms 300 is at least two, and the different oil fume treatment mechanisms 300 are all arranged in the air duct 110 and located between the driving fan 200 and the air inlet 120. The air outlet 312 of the filter fan 310 of one oil fume treatment mechanism 300 is connected to the air inlet 311 of the filter fan 310 of another adjacent oil fume treatment mechanism 300. Since the number of the oil fume treatment mechanisms 300 is at least two, and each oil fume treatment mechanism 300 includes a first filter element 320 and a second filter element 330, the oil fume can be filtered by the first filter element 320 and the second filter element 330 of different oil fume treatment mechanisms 300, thereby further enhancing the filtering efficiency of the oil fume and reducing the pollution to the air.

[0052] In this embodiment, there are two oil fume treatment mechanisms 300, which are arranged along the flow direction of the oil fume, so that the oil fume passes through one oil fume treatment mechanism 300 and then enters another oil fume treatment mechanism 300 for filtration, thereby effectively improving the filtration effect of the oil fume. In another embodiment, the number of the oil fume treatment mechanisms 300 can also be three, four, or other numbers. Alternatively, there can be only one oil fume treatment mechanism 300.

[0053] In one embodiment, the range hood 10 further includes an air duct 400, one end of which is connected to the exhaust port 312 of one of the oil fume treatment mechanisms 300, and the other end of which is connected to the air inlet 311 of another adjacent oil fume treatment mechanism 300. By providing the air duct 400, two adjacent oil fume treatment mechanisms 300 can be effectively connected, so that the oil fume can flow from one oil fume treatment mechanism 300 to another adjacent oil fume treatment mechanism 300 along the air duct 110, thereby improving the stability of the oil fume flow and improving the stability of the oil fume filtration. It should be noted that in this embodiment, adjacent does not refer to absolute adjacent in spatial position, but refers to the adjacent relationship in the direction of oil fume flow.

[0054] In other embodiments, the air duct 110 can be omitted, so that the exhaust port 312 of one oil fume treatment mechanism 300 is connected to the air inlet 311 of another oil fume treatment mechanism 300, so as to achieve the connection between the two oil fume treatment mechanisms 300. Alternatively, different oil fume treatment mechanisms 300 are all arranged in the air duct 110, and the air duct 110 is used to effectively limit the flow direction of oil fume, so that the oil fume can flow from one oil fume treatment mechanism 300 to another oil fume treatment mechanism 300.

[0055] In one embodiment, the range hood 10 further includes a lifting mechanism, the oil fume treatment mechanism 300 is arranged on the lifting mechanism and is located in the air duct 110, and the lifting mechanism is used to drive the oil fume treatment mechanism 300 to move between the driving fan 200 and the air inlet 120. By providing the lifting mechanism, the distance between the oil fume treatment mechanism 300 and the air inlet 120 can be adjusted, so that the position of the oil fume treatment mechanism 300 relative to the air inlet 120 can be adjusted according to the concentration of oil fume, the size of the heating power of the cooking utensils, etc., further improving the convenience of use. In other embodiments, the lifting mechanism can also be omitted, and the oil fume treatment mechanism 300 is directly fixed in the air duct 110.

[0056] See also Figure 2 In one embodiment, the first filter element 320 includes a first filter screen, which is disposed at the air inlet 311 and covers the air inlet 311. By providing the first filter screen, oil droplets and / or other pollutants in the oil smoke can be effectively filtered, so that part or all of the oil droplets and / or other pollutants can be filtered by the first filter screen to the side of the first filter screen that is away from the filter fan 310, thereby reducing or preventing the oil droplets and / or other pollutants from entering the filter fan 310. For example, the first filter screen can be a honeycomb filter screen. Alternatively, the first filter screen can be other mesh structures, as long as the effect of filtering oil droplets and / or other pollutants can be achieved.

[0057] In one embodiment, the first filter element 320 further includes a first adsorption layer, which is stacked with the first filter screen, and is located on the side of the first filter screen facing the filter fan 310. Since the first adsorption layer is located on the side of the first filter screen facing the filter fan 310, the first adsorption layer can effectively adsorb oil droplets and / or other pollutants, further reducing the possibility of oil droplets and / or other pollutants entering the filter fan 310, thereby ensuring the cleanliness of the filter fan 310.

[0058] Specifically, the first adsorption layer is an activated carbon layer, so that the oil smoke can be filtered through the activated carbon layer. Since the activated carbon layer has a good filtering and absorption effect, the filtering effect of the first filter element 320 is improved.

[0059] In one embodiment, the first adsorption layer has a first accommodating cavity, and a first fan blade is provided in the first accommodating cavity, and the first fan blade can be controlled to rotate or stop in the first accommodating cavity. Specifically, the number of the first fan blades is at least two, and each first fan blade can be controlled to rotate or stop in the first accommodating cavity. In this way, when the range hood 10 is working, the first fan blade can be controlled to rotate in the first accommodating cavity, and when the oil smoke passes through the first fan blade, the oil stains contained in it are easily separated from the oil smoke under the centrifugal force of the first fan blade, and then are easily adsorbed by the first adsorption layer, thereby improving the adsorption effect.

[0060] In one embodiment, the first filter element 320 is detachably disposed at the air inlet 311. The first filter element 320 can be easily cleaned or replaced by disassembling the first filter element 320. For example, since the first adsorption layer is used to adsorb oil, after a period of use, the first filter element 320 can be disassembled and the first adsorption layer can be replaced. The first filter net is used to filter oil, and the first filter net can be easily cleaned by disassembling the first filter net.

[0061] See also Figure 2 and Figure 3 In one embodiment, the second filter element 330 includes a second adsorption layer, which is disposed at the air outlet 312 and covers the air outlet 312. Since the second adsorption layer is disposed at the air outlet 312, the second adsorption layer can effectively adsorb oil droplets and / or other pollutants, thereby reducing or avoiding the possibility of oil droplets and / or other pollutants dripping into the filter fan 310, thereby ensuring the cleanliness of the filter fan 310.

[0062] Specifically, the second adsorption layer is an activated carbon layer, so that the oil smoke can be filtered by the activated carbon layer. Since the activated carbon layer has a good filtering and absorption effect, the filtering effect of the second filter element 330 is improved.

[0063] In one embodiment, the second adsorption layer has a second accommodating cavity, and a second fan blade is provided in the second accommodating cavity, and the second fan blade can be controlled to rotate or stop in the second accommodating cavity. Specifically, the number of the second fan blades is at least two, and each second fan blade can be controlled to rotate or stop in the second accommodating cavity. When the range hood 10 is working, the second fan blade can be controlled to rotate in the second accommodating cavity, and when the oil smoke passes through the second fan blade, the oil dirt contained in it is easily separated from the oil smoke under the centrifugal force of the second fan blade, and then it is easy to be adsorbed by the second adsorption layer, thereby improving the adsorption effect.

[0064] In one embodiment, the second filter element 330 further includes a second filter screen, the second filter layer and the second adsorption layer are stacked, and the second filter layer is arranged on the side of the second adsorption layer facing away from the filter fan 310. By providing the second filter screen, oil droplets and / or other pollutants in the oil smoke can be effectively filtered, so that part or all of the oil droplets and / or other pollutants can be filtered by the second filter screen to the side of the second filter screen facing away from the filter fan 310, thereby reducing or preventing the oil droplets and / or other pollutants from entering the filter fan 310. For example, the second filter screen can be a honeycomb filter screen. Alternatively, the second filter screen can be other mesh structures, as long as the effect of filtering oil droplets and / or other pollutants can be achieved.

[0065] In one embodiment, the second filter element 330 is detachably disposed at the air outlet 312. The second filter element 330 can be easily cleaned or replaced by removing the second filter element 330. For example, since the second adsorption layer is used to adsorb oil, after a period of use, the second filter element 330 can be removed and the second adsorption layer can be replaced. The second filter net is used to filter oil, and the first filter net can be easily cleaned by removing the second filter net.

[0066] See also Figure 2 and Figure 3 In one embodiment, the filter fan 310 includes a filter motor 313 and a filter blade 314 connected to the filter motor 313, and the filter motor 313 can drive the filter blade 314 to rotate. Specifically, the filter fan 310 also includes a filter volute 315, the filter blade 314 is arranged in the filter volute 315, and the air inlet 311 and the air outlet 312 are opened on the filter volute 315. And the filter motor 313 is arranged on the filter volute 315 through a fixing bracket. By setting the filter volute 315, it is convenient to set the filter motor 313 and the filter blade 314.

[0067] In this embodiment, the filter fan 310 is a centrifugal fan. In other embodiments, the filter fan 310 can also be an axial flow fan or other fans that can filter oil smoke.

[0068] like Figure 2 As shown, in one embodiment, the oil fume treatment mechanism 300 includes a mounting shell 340, the filter fan 310 is disposed in the mounting shell 340, the filter fan 310 is disposed in the mounting shell 340, the mounting shell 340 is mounted on the inner wall of the housing 100, and the mounting shell 340 is provided with a first opening connected to the air inlet 311 and a second opening connected to the air outlet 312. By providing the mounting shell 340, the installation of the filter fan 310 in the air duct 110 of the housing 100 is further facilitated.

[0069] Optionally, the filter fan 310 is installed in the installation shell 340 through the installation bracket 350. In this embodiment, the filter fan 310 is installed in the installation shell 340 through the "L"-shaped installation bracket 350. In other embodiments, the filter fan 310 can also be directly installed on the inner wall of the installation shell 340.

[0070] Specifically, the mounting shell 340 is provided with a heat dissipation port 342, which facilitates the heat dissipation of the filter fan 310, thereby increasing the service life of the filter fan 310. Furthermore, there are multiple heat dissipation ports 342, which are arranged at intervals, and can further improve the heat dissipation effect of the filter fan 310.

[0071] See also Figure 1 In one embodiment, the driving fan 200 includes a driving motor 210 and a driving blade 220 connected to the driving motor 210, and the driving motor 210 can drive the driving blade 220 to rotate. Specifically, the driving fan 200 also includes a driving volute 230, and the driving blade 220 is arranged in the driving volute 230. And the driving motor 210 is arranged on the driving volute 230 through a fixed bracket. By setting the driving volute 230, it is convenient to set the driving motor 210 and the driving blade 220. In this embodiment, the driving fan 200 is a centrifugal fan. In other embodiments, the driving fan 200 can also be an axial flow fan or other fans that can provide power for the flow of oil smoke.

[0072] In one embodiment, the range hood 10 further includes a check valve 500, which is disposed at the air outlet 130. The check valve 500 allows the air to flow in a direction in which the air outlet 130 is away from the air inlet 120. By disposing the check valve 500 at the air outlet 130, the possibility of the exhaust fume or gas flowing back can be effectively reduced, thereby preventing the outside air from entering the interior of the range hood 10 through the air outlet 130 and entering the room through the air inlet 120.

[0073] In one embodiment, the range hood 10 further includes an oil net 600, which is connected to the housing 100 and located at the air inlet 120. When the range hood is in operation, the fan 200 is driven to start, and a negative pressure is generated on one side of the air inlet 120, so that indoor oil smoke is sucked in. The oil smoke passes through the oil net 600, and the oil droplets and / or other pollutants contained therein can be filtered by the oil net 600, and then enter the air duct 110, and continue to be filtered by the oil smoke treatment mechanism 300.

[0074] In one embodiment, the range hood 10 further includes an oil cup 700, which is connected to the housing 100 and communicated with the air inlet 120, and is used to receive the oil stains flowing out of the air inlet 120. During operation, the oil stains filtered by the first filter element 320 and the second filter element 330 enter the air duct 110 under the action of gravity, and flow from the air duct 110 to the air inlet 120 and then flow to the oil cup 700 to be collected. Furthermore, the oil stains on the oil net 600 can also flow to the oil cup 700 to be collected.

[0075] See also Figure 1 and Figure 4 In one embodiment, the range hood 10 further includes a control panel 800, which is disposed on the outer wall of the housing 100 and is electrically connected to the controller. The control panel 800 is provided to facilitate user operation and thus facilitate control of the operation of the range hood 10.

[0076] Specifically, a start button 810 and an oil fume treatment button 820 are provided on the control panel 800. The start button 810 is electrically connected to the driving fan 200, and the oil fume treatment button 820 is electrically connected to the filter fan 310. By pressing the start button 810, the driving fan 200 can be controlled to start, and by pressing the oil fume treatment button 820, the filter fan 310 can be controlled to start. In other embodiments, the oil fume treatment button 820 can also be omitted, and when the driving fan 200 is started, the filter fan 310 can be started at the same time.

[0077] Optionally, a timer 830 is further provided on the control panel 800, and the timer 830 is electrically connected to the filter fan 310 through the controller. By setting the timer 830, it is convenient to perform timed operation on the filter fan 310, control the running time of the filter fan 310, and thus improve the convenience of use.

[0078] Optionally, a filter start button 840 is further provided on the control panel 800, and the filter start button 840 is electrically connected to the first fan blade of the first filter element 320 and the second fan blade of the second filter element 330 through the controller. By providing the filter start button 840, it is convenient to control the start of the first fan blade and the second fan blade, thereby improving the filtering effect of the oil smoke. In another embodiment, the filter start button 840 can also be omitted, and when the filter fan 310 is started, the first fan blade and the second fan blade are started at the same time.

[0079] Optionally, an alarm 850 may be provided on the control panel 800, and the alarm 850 is electrically connected to the controller. When the driving fan 200 and / or the filtering fan 310 cannot be started normally, the alarm 850 may be triggered, and the alarm 850 may be used to remind the user that the range hood 10 cannot be used normally. In other embodiments, the alarm 850 may be omitted.

[0080] Optionally, a stop button 860 may be further provided on the control panel 800, and the stop button 860 is used to conveniently control the driving fan 200 and the filtering fan 310 to stop running.

[0081] In one embodiment, a control method of a range hood 10 is provided, wherein the range hood 10 may be the range hood 10 in any of the above embodiments. Specifically, the control method of the range hood 10 comprises the following steps:

[0082] Step S100: obtaining a start signal;

[0083] Step: 200: starting the driving fan 200 according to the starting signal;

[0084] Step S300: obtaining a fume processing signal;

[0085] Step S400: starting the filter fan 310 according to the oil fume processing signal.

[0086] The control method of the range hood 10 described above, when it is necessary to extract the oil fume, starts the driving fan 200 after obtaining the start signal, and uses the driving fan 200 to provide power for the flow of the oil fume, so that the oil fume enters the air duct 110 from the air inlet 120. According to the use requirements, the oil fume treatment is triggered, and then the filter fan 310 of the oil fume treatment mechanism 300 is started after obtaining the oil fume treatment signal, so that the oil fume entering the air duct 110 can be sucked into the filter fan 310 from the suction port after being filtered by the first filter element 320, and discharged from the exhaust port 312 through the second filter element 330. The driving fan 200 can further discharge the oil fume passing through the oil fume treatment mechanism 300 through the air outlet 130. Because the oil smoke is filtered by the first filter element 320 and the second filter element 330 of the oil smoke treatment mechanism 300 before being discharged from the air outlet 130 through the driving fan 200, pollutants in the oil smoke are effectively filtered, thereby reducing the pollution of the oil smoke discharged from the air outlet 130 to the outdoor environment. At the same time, because the driving fan 200 and the filtering fan 310 can absorb the oil smoke at the same time, the efficiency of sucking the oil smoke can be improved, the efficiency of capturing the oil smoke can be improved, and the pollution of the oil smoke to the kitchen environment can be reduced.

[0087] The control method in the above embodiment can also choose not to start the filter fan 310 of the oil fume treatment mechanism 300 after starting the driving fan 200 according to the usage situation, so as to provide users with a variety of options. The oil fume treatment mechanism 300 can be turned on or off according to the usage situation, thereby improving the applicability of use.

[0088] In one embodiment, after step S300: obtaining the oil smoke processing signal, the method further includes:

[0089] The first fan blade of the first filter element 320 and the second fan blade of the second filter element 330 are activated according to the oil fume processing signal.

[0090] Since the first filter element 320 is provided with a first fan blade, driving the first fan blade can further improve the filtering effect of the first filter element 320. Since the second filter element 330 is provided with a second fan blade, driving the second fan blade can further improve the filtering effect of the second filter element 330.

[0091] In one embodiment, before step S400: starting the filter fan 310 according to the oil fume processing signal, the method further includes:

[0092] Step S500: obtaining a set time;

[0093] Step S600: starting the filter fan 310 to work for the set time according to the oil fume processing signal.

[0094] During use, a set time can be set according to usage conditions and usage requirements, and after obtaining the set time, the filter fan 310 is started to work for the set time to ensure that the filter fan 310 can filter for the set time, further improving the intelligence of the range hood 10 during use.

[0095] In one embodiment, after step S600: starting the filter fan 310 to work for the set time according to the oil fume processing signal, the following steps are further included:

[0096] Controlling the filter fan 310 to stop running;

[0097] The driving fan 200 is controlled to stop running.

[0098] When the filter fan 310 has completed the set time, the fume extraction work is considered to be completed. By stopping the filter fan 310 and the driving fan 200, the range hood 10 is automatically shut down, further improving the intelligence of the use of the range hood 10.

[0099] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0100] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0101] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0102] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0103] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0104] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0105] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A range hood, characterized in that: The range hood comprises: A casing, wherein an air duct is formed in the casing, and an air inlet and an air outlet respectively connected to the air duct are formed on the casing; A driving fan, the driving fan being disposed in the air duct, and the driving fan being used to provide power to make the oil smoke flow from the air inlet to the air outlet; and An oil fume treatment mechanism, wherein the number of the oil fume treatment mechanisms is two, and the oil fume treatment mechanisms are both arranged in the air duct and located between the driving fan and the air inlet; Each of the oil fume treatment mechanisms comprises a filter fan, a first filter element and a second filter element, the filter fan is formed with an air inlet and an air outlet, the air inlet of one of the filter fans is connected with the air inlet, the air outlet of the filter fan is connected with the air inlet of another filter fan, the air outlet of the other filter fan corresponds to the driving fan, the first filter element of each of the oil fume treatment mechanisms is arranged at the air inlet thereof and covers the air inlet, the second filter element is arranged at the air outlet thereof and covers the air outlet; An air duct, one end of which is connected to the air outlet of one of the oil fume treatment mechanisms, and the other end of which is connected to the air inlet of another adjacent oil fume treatment mechanism.

2. The range hood according to claim 1, characterized in that: There is a distance between the oil fume treatment mechanism and the inner wall of the air duct, and the filter fan is electrically connected to the driving fan in parallel or the filter fan is electrically connected to the driving fan in series.

3. The range hood according to claim 1, characterized in that: The first filter element includes a first filter screen, and the first filter screen is arranged at the air inlet and covers the air inlet.

4. The range hood according to claim 3, characterized in that: The first filter element further includes a first adsorption layer, which is stacked with the first filter screen, and the first adsorption layer is located on a side of the first filter screen facing the filter fan.

5. The range hood according to claim 1, characterized in that: The second filter element includes a second adsorption layer, and the second adsorption layer is arranged at the air outlet and covers the air outlet.

6. The range hood according to claim 5, characterized in that: The second filter element further includes a second filter screen, which is stacked with the second adsorption layer, and the second filter screen is arranged on a side of the second adsorption layer facing away from the filter fan.

7. The range hood according to any one of claims 1 to 6, characterized in that: The first filter element is detachably arranged at the air inlet; and / or The second filter element is detachably arranged at the air outlet.

8. The range hood according to any one of claims 1 to 6, characterized in that: The filter fan is a centrifugal fan.

9. The range hood according to any one of claims 1 to 6, characterized in that: The oil fume treatment mechanism includes a mounting shell, the filter fan is arranged in the mounting shell, the mounting shell is installed on the inner wall of the casing, and the mounting shell is provided with a first opening connected to the air inlet of the internal filter fan, and a second opening connected to another internal filter fan.

10. The range hood according to any one of claims 1 to 6, characterized in that: It also includes a lifting mechanism, the oil fume treatment mechanism is arranged on the lifting mechanism and is located in the air duct, and the lifting mechanism is used to drive the oil fume treatment mechanism to move between the driving fan and the air inlet.

11. The range hood according to any one of claims 1 to 6, characterized in that: It also includes a controller, and the filter fan and the drive fan are electrically connected to the controller respectively.

12. The range hood according to any one of claims 1 to 6, characterized in that: It also includes a check valve, which is arranged at the air outlet, and the flow direction allowed by the check valve is the direction in which the air outlet is away from the air inlet.

13. A control method for a range hood, characterized in that: The range hood comprises a casing, a driving fan and an oil fume treatment mechanism, an air duct is formed in the casing, and an air inlet and an air outlet respectively connected to the air duct are formed on the casing; the driving fan is arranged in the air duct, and the driving fan is used to provide power to make the oil fume flow from the air inlet to the air outlet; the number of the oil fume treatment mechanisms is two, and the oil fume treatment mechanisms are both arranged in the air duct and located between the driving fan and the air inlet; Each of the oil fume treatment mechanisms comprises a filter fan, a first filter element and a second filter element, the filter fan is formed with an air inlet and an air outlet, the air inlet of one of the filter fans is connected with the air inlet, the air outlet of the filter fan is connected with the air inlet of another filter fan, the air outlet of the other filter fan corresponds to the driving fan, the first filter element of each of the oil fume treatment mechanisms is arranged at the air inlet thereof and covers the air inlet, the second filter element is arranged at the air outlet thereof and covers the air outlet; An air duct, one end of which is connected to the air outlet of one of the oil fume treatment mechanisms, and the other end of which is connected to the air inlet of another adjacent oil fume treatment mechanism; There is a distance between the oil fume treatment mechanism and the inner wall of the air duct, and the filter fan is electrically connected in parallel with the drive fan; The control method comprises: Get the start signal; Starting the driving fan according to the starting signal; Obtaining oil fume processing signal; The filter fan is started according to the oil fume processing signal.

14. The control method of the range hood according to claim 13, characterized in that: Before the step of starting the filter fan according to the oil fume processing signal, the step further includes: Get the set time; The filter fan is started to work for the set time according to the oil fume processing signal.

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