Self-cleaning device and range hood comprising same

Abstract

The utility model provides a self-cleaning device and a range hood comprising the same, relates to the technical field of range hoods, and solves the technical problem that oil dirt in a panel, fan blades and a volute in the range hood cannot be completely cleaned. The self-cleaning device of the range hood comprises a cleaning mechanism and a cleaning system, the cleaning mechanism is movably arranged on the panel of the range hood and can reciprocate along the panel surface of the panel so as to physically and automatically clean the panel of the range hood; the cleaning system is arranged in a panel and a volute assembly of the range hood, so that the panel, a volute and fan blades are automatically cleaned by a chemical method. According to the utility model, automatic cleaning of oil dirt on the fan blades, the volute and the panel of the range hood can be realized, manual cleaning is not needed, regular self-cleaning is realized, the whole panel is kept clean and tidy, and the comfort requirement of a user is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of range hoods, in particular to a self-cleaning device and a range hood including the same. Background Art

[0002] As an essential kitchen appliance, the range hood has become an indispensable tool in modern social life. Prolonged use of the range hood will cause oil fumes to adhere to places such as the panel, the impeller, and the flue. After a long time of accumulation, it is very difficult to clean the formed grease.

[0003] The traditional cleaning of the range hood is generally manual cleaning, which is not only very difficult, but also the cleaning difficulty varies due to different product structures. To solve this problem, there are currently various range hoods with self-cleaning modes on the market, and the implementation methods are all different. For example, one uses the principle of semiconductor refrigeration and heating to achieve the purpose of oil fume cleaning. Its cold end can condense the oil droplets and particulate matters in the smoke exhaust passage, reduce the temperature of the oil fumes, and its hot end can atomize water to clean the flue with water vapor to achieve self-cleaning; however, this method can only clean the flue and cannot clean the grease on the impeller, the volute, and the panel. Or, there is a new structure that can greatly reduce the contact between the oil fumes and the fixed panel, and it is not easy for the fixed panel to quickly adhere to a large amount of oil mist, so there is no need to frequently clean the fixed panel, reducing the trouble of cleaning during use and improving the user experience; however, this structure cannot clean the flue, the volute, and the impeller parts.

[0004] To solve this difficult problem, the utility model proposes a self-cleaning structure.

[0005] Compared with the above-mentioned retrieved patents, this patent provides a physical cleaning structure and a control mode to achieve the self-cleaning of the grease on the panel, and at the same time, it has the function of cleaning the volute and the impeller, solving the problems such as the difficult cleaning of the grease inside the panel, the impeller, and the volute, the exposure of the grease on the panel outside, and the impact on the overall aesthetics.

[0006] The applicant of the present invention has found that the prior art has at least the following technical problems: Summary of the Utility Model

[0007] The purpose of the utility model is to provide a self-cleaning device and a range hood including the same, so as to solve the technical problem that the grease inside the panel, the impeller, and the volute in the range hood cannot be comprehensively cleaned in the prior art.

[0008] To achieve the above purpose, the utility model provides the following technical solutions:

[0009] A self-cleaning device for a range hood provided by the utility model includes a cleaning mechanism and a cleaning system; wherein:

[0010] The cleaning mechanism is movably arranged on the panel of the range hood and can reciprocate along the panel surface to automatically clean the panel of the range hood physically;

[0011] The cleaning system is arranged in the panel and the volute component of the range hood to automatically clean the panel, the volute and the impeller by chemical methods.

[0012] The self-cleaning device provided by the utility model can realize the automatic cleaning of the oil dirt on the impeller, the volute and the panel of the range hood through the cleaning mechanism and the cleaning system, without manual cleaning, realizing regular self-cleaning, keeping the whole panel clean and tidy, greatly improving the comfort requirements of users, and solving the problems that it is difficult to clean the oil dirt inside the impeller and the volute, and it is difficult to clean the oil dirt on the panel, and the oil dirt on the panel is exposed outside, affecting the overall beauty.

[0013] As a further improvement of the utility model, the cleaning mechanism includes a cleaning shovel, a gear transmission system, a middle connecting rod, a guide rail, a first driving motor and a second driving motor; wherein:

[0014] The guide rail is arranged on the periphery of the filter screen in the middle of the panel;

[0015] The middle connecting rod is slidably arranged in the guide rail in a way of being limited in the front, back, left and right directions;

[0016] The gear transmission system is arranged at both ends of the panel;

[0017] The number of the cleaning shovels is two sets, which are respectively arranged between the guide rail and the gear transmission system, and one end of the cleaning shovel is in transmission connection with the gear transmission system, and the other end is connected with the middle connecting rod;

[0018] The first driving motor is in transmission connection with one of the gear transmission systems;

[0019] The second driving motor is installed on the two sets of gear transmission systems and is in transmission connection with the two sets of cleaning shovels.

[0020] As a further improvement of the utility model, the middle connecting rod is a telescopic middle connecting rod.

[0021] As a further improvement of the utility model, the cleaning shovel is a telescopic cleaning shovel.

[0022] As a further improvement of the utility model, the gear transmission system includes a chute, a rack, a gear and a driving box; wherein:

[0023] The chute is arranged on both sides of the rack;

[0024] The gear is rotatably installed in the driving box;

[0025] The cleaning spatula is connected to the second drive motor in the drive box;

[0026] The drive box is of a U-shaped structure, and two free ends are slidably arranged in the chute in a limiting manner;

[0027] The gear is meshed and connected with the rack, and the first drive motor is in transmission connection with one of the gears.

[0028] As a further improvement of the present utility model, the cleaning system includes a first branch pipe, a second branch pipe, a third branch pipe, small nozzles, a four-way nozzle, and a solenoid valve; wherein:

[0029] One end of the solenoid valve is respectively communicated with the degreasing agent supply pipe and the hot water supply pipe, and the other end is communicated with the first branch pipe;

[0030] The end of the first branch pipe is connected to the four-way nozzle;

[0031] The four-way nozzle is placed inside the volute assembly and outside the centrifugal impeller;

[0032] One end of the second branch pipe is connected to the first branch pipe;

[0033] The third branch pipe is connected to the other end of the second branch pipe;

[0034] The small nozzles are respectively arranged at both ends of the third branch pipe and are located at the tops on both sides of the panel.

[0035] An oil fume machine provided by the present utility model includes a housing body, a volute assembly, a sewage tank, a panel, and the self-cleaning device; wherein:

[0036] A window for installing the panel is arranged on the front side of the housing body;

[0037] A flue groove is arranged at the top of the housing body;

[0038] The volute assembly is arranged inside the housing body, and the flue passes through the flue groove;

[0039] The panel covers the window;

[0040] A sewage tank installation opening is arranged at the bottom of the housing body;

[0041] The sewage tank is installed on the sewage tank installation opening;

[0042] The cleaning mechanism is movably installed on the housing body on both sides of the window and is in contact connection with the panel;

[0043] The cleaning system passes through the housing body and then extends into the volute assembly and the surface of the panel respectively.

[0044] As a further improvement of the present utility model, a filter screen is provided in the middle of the panel; an annular guide ring is provided on the periphery of the filter screen; guide rails are respectively provided on two opposite sides of the guide ring; a slider is slidably arranged in the guide rails, and the middle connecting rod in the cleaning mechanism is connected to the slider.

[0045] To solve the problem that it is difficult to clean the oil dirt on the panel of the range hood, the oil dirt on the impeller and the inside of the volute, the present utility model provides a self-cleaning device, which includes a cleaning mechanism and a cleaning system. The cleaning mechanism includes a cleaning shovel, a slide rail, a slider and a gear transmission system; the cleaning system includes a cleaning agent supply pipe system and a spray head, and a self-cleaning control logic is provided to realize the self-cleaning of the panel structure, perform self-cleaning regularly, keep the whole panel clean and tidy, and improve user comfort; at the same time, the provided cleaning agent supply pipeline system is connected to the volute assembly, and a control logic is provided to realize the cleaning of the centrifugal impeller and the inside of the volute of the range hood.

[0046] A control method for the self-cleaning device provided by the present utility model includes the following steps:

[0047] Start the cleaning mode;

[0048] Control the cleaning system to spray degreasing agent on the panel, volute and centrifugal impeller;

[0049] After standing for the first set time, control the cleaning mechanism to start for at least one physical cleaning of the panel;

[0050] After standing for the second set time, control the cleaning system to spray hot water on the panel, volute and centrifugal impeller.

[0051] As a further improvement of the present utility model, the step of controlling the cleaning system to spray degreasing agent on the panel, volute and centrifugal impeller includes:

[0052] Control the solenoid valve to open the port communicating with the degreasing agent supply pipe;

[0053] Open the four-way spray head, the centrifugal impeller and the small spray head to spray degreasing agent on the inner wall of the volute, the centrifugal impeller and the panel;

[0054] After continuously spraying for the third set time, close the four-way spray head and the small spray head;

[0055] After waiting for the fourth set time, close the centrifugal impeller.

[0056] As a further improvement of the present utility model, the step of controlling the cleaning mechanism to start for at least one physical cleaning of the panel includes:

[0057] Lift the cleaning shovel;

[0058] Control the cleaning shovel to move to the top position of the panel;

[0059] Put down the cleaning spatula to fit on the panel, and then control the cleaning spatula to move downward along the surface of the panel for a surface cleaning.

[0060] As a further improvement of the present utility model, controlling the cleaning system to spray hot water on the panel, the volute casing, and the centrifugal impeller includes:

[0061] Control the solenoid valve to open the port communicating with the hot water supply pipe;

[0062] Open the four-way nozzle, the centrifugal impeller, and the small nozzle to spray hot water on the inner wall of the volute casing, the centrifugal impeller, and the panel;

[0063] After continuously spraying for the third set time, close the four-way nozzle and the small nozzle;

[0064] After waiting for the fourth set time, close the centrifugal impeller;

[0065] Take out the sewage tank to pour out the sewage and end the cleaning process. BRIEF DESCRIPTION OF THE DRAWINGS

[0066] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0067] Figure 1 is an exploded structural schematic diagram of the range hood of the present utility model;

[0068] Figure 2 is a structural schematic diagram of the range hood of the present utility model;

[0069] Figure 3 is an exploded structural schematic diagram of the self-cleaning device of the present utility model;

[0070] Figure 4 is a partial structural schematic diagram of the self-cleaning device of the present utility model;

[0071] Figure 5 is a structural schematic diagram of the middle connecting rod of the self-cleaning device of the present utility model;

[0072] Figure 6 is the front view of the cleaning spatula of the self-cleaning device of the present utility model;

[0073] Figure 7 is Figure 6 the schematic diagram in the X direction;

[0074] Figure 8 isFigure 6 Schematic diagram in the Y direction;

[0075] Figure 9 It is a cross-sectional view of the cleaning spatula in the self-cleaning device of the present utility model;

[0076] Figure 10 It is Figure 4 Partial enlarged view of A in;

[0077] Figure 11 It is a schematic structural diagram when the cleaning mechanism and the panel in the self-cleaning device of the present utility model are assembled together;

[0078] Figure 12 It is Figure 11 Partial enlarged view of B in;

[0079] Figure 13 It is a partial enlarged view of the slider and the guide rail in the self-cleaning device of the present utility model;

[0080] Figure 14 It is a schematic structural diagram when the drive box and the gear transmission system in the self-cleaning device of the present utility model are assembled together;

[0081] Figure 15 It is a schematic structural diagram of another perspective when the drive box and the gear transmission system in the self-cleaning device of the present utility model are assembled together;

[0082] Figure 16 It is a schematic structural diagram of the drive box in the self-cleaning device of the present utility model;

[0083] Figure 17 It is a schematic structural diagram of the gear transmission system in the self-cleaning device of the present utility model;

[0084] Figure 18 It is Figure 14 Partial enlarged view of C in;

[0085] Figure 19 It is a schematic structural diagram when the range hood of the present utility model is being cleaned;

[0086] Figure 20 It is a schematic structural diagram of the slider in the self-cleaning device of the present utility model;

[0087] Figure 21 It is a schematic structural diagram of the end part of the middle connecting rod in the self-cleaning device of the present utility model;

[0088] Figure 22 It is a flowchart of the control method of the present utility model;

[0089] Figure 23 It is a flowchart of an embodiment of the control method of the range hood of the present utility model.

[0090] In the figure: 1. Outer housing; 11. First inlet pipe hole; 12. Flue groove; 13. Empty groove; 14. Sewage tank installation opening; 15. Gear drive system; 151. First chute; 152. Second chute; 2. Panel assembly; 21. Panel; 211. Filter screen; 212. Guide rail; 213. Third inlet pipe hole; 22. Cleaning mechanism; 221. Drive box; 222. Cleaning spatula; 223. Slide block; 224. Middle connecting rod; 2211. First drive motor; 2212. Gear; 2221. Telescopic spring; 2231. Plug; 2232. Step; 3. Volute assembly; 31. Flue; 32. Centrifugal fan blade; 33. Second inlet pipe hole; 34. Water outlet; 4. Sewage tank; 5. Cleaning system; 51. Small spray head; 52. Four-way spray head; 53. First branch pipe; 54. Second branch pipe; 55. Solenoid valve; 56. Third branch pipe. Detailed implementation mode

[0091] To make the objectives, technical solutions and advantages of the present utility model clearer, the technical solutions of the present utility model will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other implementation manners obtained by those of ordinary skill in the art without making creative efforts shall fall within the scope protected by the present utility model.

[0092] As Figures 1 - 21 shown, the present utility model provides an automatic self-cleaning device for a range hood, including a cleaning mechanism 22 and a cleaning system 5; wherein:

[0093] The cleaning mechanism 22 is movably arranged on the panel 21 of the range hood and can reciprocate along the panel surface of the panel 21 to automatically clean the panel 21 of the range hood physically; it should be noted here that the physical cleaning in this embodiment refers to using the cleaning spatula 222 to scrape off the oil stains along the panel surface of the panel 21.

[0094] The cleaning system 5 is arranged in the panel 21 and the volute assembly 3 of the range hood to automatically clean the panel 21, the volute and the fan blade chemically. It should be noted here that the chemical methods in this embodiment include degreaser cleaning and hot water cleaning.

[0095] The self-cleaning device provided by the present utility model can realize the automatic cleaning of the oil stains on the fan blade, the volute and the panel 21 of the range hood through the cleaning mechanism 22 and the cleaning system 5, without manual cleaning, realizing regular self-cleaning, keeping the whole panel 21 clean and tidy, greatly improving the comfort requirements of users, and solving the problems that it is difficult to clean the oil stains inside the centrifugal fan blade 32 and the volute, the oil stains on the panel 21 are difficult to clean, and the oil stains on the panel 21 are exposed outside, affecting the overall aesthetics.

[0096] As an alternative embodiment of the present utility model, the cleaning mechanism 22 has a left-right symmetric structure and includes a cleaning shovel, a gear transmission system 15, a middle connecting rod 224, a guide rail 212, a first driving motor 2211, and a second driving motor; where:

[0097] The guide rail 212 is arranged on the periphery of the filter screen 211 in the middle of the panel 21, providing a path for the up-and-down movement of the slider 223; steps 2232 are provided both above and below the slider 223 to embed it in the circular guide rail 212, playing a limiting role.

[0098] The middle connecting rod 224 is slidably arranged in the guide rail 212 in a manner limited in the front-back, left-right, and up-down directions; it should be noted here that the front-back direction refers to the axis direction of the filter screen 211, that is, the direction perpendicular to the panel 21; the left-right direction refers to the extending direction of the sewage tank 4; and the up-down direction refers to the direction perpendicular to the extending direction of the sewage tank 4.

[0099] The gear transmission system 15 is arranged at both ends of the panel 21;

[0100] There are two sets of cleaning shovels 222, which are respectively arranged between the guide rail 212 and the gear transmission system 15, and one end of the cleaning shovel 222 is in transmission connection with the gear transmission system 15, and the other end is connected to the middle connecting rod 224. Specifically, the other end of the cleaning shovel 222 is connected to the middle connecting rod 224 through the slider 223, and the slider 223 slides in the guide rail 212 in a limited manner;

[0101] The first driving motor 2211 is in transmission connection with one of the gear transmission systems 15;

[0102] There are two sets of second driving motors, which are respectively installed on the two sets of gear transmission systems 15, and the two sets of second driving motors are respectively in transmission connection with the two sets of cleaning shovels 222.

[0103] Specifically, the second driving motor is a stepping motor, which is connected to the cleaning shovel. By turning on the stepping motor, the cleaning shovel can be lifted or lowered.

[0104] Considering that the filter screen 211 is generally circular in structure on the panel 21 in the panel assembly 2, the cleaning area on the panel 21 is an irregular rectangle, and the side close to the filter screen 211 is an arc-shaped structure. If the middle connecting rod 224 is a non-changeable specification structure, it will cause the slider 223 to not be able to move smoothly along the guide rail 212. Therefore, in this embodiment, the middle connecting rod 224 is a telescopic middle connecting rod 224. By setting the middle connecting rod 224 to a telescopic structure, it can ensure the smooth movement of the cleaning mechanism along the surface of the panel 21. It should be noted here that the telescopic structure of the middle connecting rod 224 can be realized by a telescopic sleeve structure, or can also be realized by other existing technologies, and the present utility model does not make specific limitations.

[0105] Considering that the filter screen 211 is provided on the panel 21 in the panel assembly 2, and the filter screen 211 is generally circular in structure, the area for cleaning on the panel 21 is an irregular rectangle, and the side close to the filter screen 211 is an arc-shaped structure. If the specification of the cleaning spatula 222 is invariable, there will be a situation where either the cleaning spatula 222 cannot clean the entire area of the panel 21, or it is inconvenient to contact the filter screen 211. Therefore, in this embodiment, in order to improve the flexible use function of the cleaning spatula 222, the cleaning spatula 222 is a telescopic cleaning spatula in this embodiment, which can be adjusted in real time according to the size of the cleaning area of the panel 21, not only ensuring full coverage of the cleaning area on the panel 21, but also avoiding contact with the filter screen 211 and damaging the filter screen 211.

[0106] It should be noted that the telescopic structure of the cleaning spatula 222 includes an outer spatula, an inner spatula, and a telescopic spring 2221; the outer spatula wraps around the outside of the inner spatula, one end of the inner spatula is connected to the inner wall of the outer spatula through the telescopic spring 2221, and the other end is slidably connected to the guide rail through a slider 223, and the other end of the outer spatula is connected to the drive box 221.

[0107] Furthermore, the cleaning spatula is connected to the drive box through a shaft and a shaft hole. The connection method between the cleaning spatula and the slider is that a pin 2231 is embedded in a round hole.

[0108] In this embodiment, the cleaning mechanism is a left-right symmetric distribution structure, that is, one end of the cleaning spatula is connected to the drive box, the other end is connected to the slider, and the other side is symmetrically distributed. The two sliders are connected by a middle connecting rod 224 to connect the entire cleaning mechanism into a whole, and the two drive boxes drive it to move up and down.

[0109] As an alternative embodiment of the present utility model, the gear transmission system 15 includes a chute, a rack, a gear 2212, and a drive box 221; where:

[0110] The rack is installed on both sides of the outer housing 1 to provide a movement path for the drive box 221 of the cleaning structure;

[0111] The chute is arranged on both sides of the rack and includes a first chute 151 and a second chute 152; the first chute 151 is used to provide the up and down movement path of the drive box, and the second chute 152 mainly plays a role in stabilizing and limiting.

[0112] The gear 2212 is rotatably installed in the drive box 221;

[0113] The cleaning spatula 222 is connected to the second drive motor in the drive box 221 and can be rotated under the drive of the second drive motor to lift or lower relative to the surface of the panel 21;

[0114] The drive box 221 is in a U-shaped structure, and its two free ends are slidably arranged in the chute in a limiting manner; specifically, small steps are provided at the end of the drive box 221, and the two small steps are respectively snapped into the first chute 151 and the second chute 152;

[0115] The gear 2212 is meshed and connected with the rack, and the first drive motor 2211 is in transmission connection with one of the gears 2212. Specifically, the first drive motor 2211 is a DC motor, and a gear 2212 is provided on the DC motor, and the gear 2212 is meshed and connected with the rack; when the DC motor starts, it drives the entire cleaning mechanism to move up and down.

[0116] It should be noted that when the cleaning mode is not turned on, the cleaning mechanism is defaultly placed at position three. When the cleaning mode is turned on, the stepping motor starts first to lift the cleaning shovel. Further, the DC motor is turned on to move the cleaning assembly to position one. Further, the stepping motor is turned on to lower the cleaning shovel until it contacts the panel 21. Further, the DC motor is turned on, and the two drive boxes drive the cleaning mechanism to move from position one through position two to position three (the two sliders in the circular guide rail 212 are respectively driven by the two drive boxes on both sides, so that they move up and down in the circular guide rail 212. The two sliders are connected by the middle connecting rod 224, which plays a role in balancing the torque). Thus, one cleaning is completed. Since the lengths of the cleaning shovel and the middle connecting rod 224 are constantly changing during the process of the cleaning mechanism moving from position one through position two to position three, a telescopic device is provided for the cleaning shovel and the middle connecting rod 224. That is, the cleaning shovel is composed of two cleaning shovel parts combined and telescoped, and is connected by a telescopic spring 2221 inside. Similarly, the middle connecting rod 224 is set as a telescopic rod using this principle.

[0117] As an optional implementation manner of the present utility model, the cleaning system 5 includes a first branch pipe 53, a second branch pipe 54, a third branch pipe 56, a small nozzle 51, a four-way nozzle 52, and a solenoid valve 55; wherein:

[0118] One end of the solenoid valve 55 is respectively communicated with the degreasing agent supply pipe and the hot water supply pipe, and the other end is communicated with the first branch pipe 53;

[0119] The end of the first branch pipe 53 is connected to the four-way nozzle 52;

[0120] The four-way nozzle 52 is placed in the volute assembly 3 and is located outside the centrifugal fan blade 32;

[0121] One end of the second branch pipe 54 is connected to the first branch pipe 53;

[0122] The third branch pipe 56 is connected to the other end of the second branch pipe 54;

[0123] The small nozzles 51 are respectively arranged at both ends of the third branch pipe 56 and are located at the tops on both sides of the panel 21.

[0124] An oil fume extractor provided by the utility model comprises a housing body 1, a volute component 3, a sewage tank 4, a panel 21 and a self-cleaning device; wherein:

[0125] A window for installing the panel 21 is arranged on the front side of the housing body 1;

[0126] A flue groove 12 is arranged at the top of the housing body 1;

[0127] The volute component 3 is arranged inside the housing body 1, and a flue 31 penetrates out of the flue groove 12 and is connected to the external environment; specifically, the volute component 3 comprises a flue 31, a centrifugal impeller 32, a second inlet pipe hole 33 and a water outlet 34; wherein the second inlet pipe hole 33 is arranged at the top of the volute component 3 for the first branch pipe 53 to extend into; the water outlet 34 is located at the bottom of the volute component 3 for discharging sewage; further, the second inlet pipe hole 33 should be located at the highest position of the volute component 3, and the water outlet 34 should be located at the lowest position of the volute component 3; and a pipeline can be connected to the outside of the water outlet 34 and communicated with the sewage tank 4, and this pipeline should be in a closed state when not being cleaned, for example, a switch valve can be added, etc.

[0128] The panel 21 covers the window;

[0129] A sewage tank installation opening 14 is arranged at the bottom of the housing body 1; empty grooves 13 are respectively arranged on the left and right sides of the housing body 1, and a gear transmission system 15 is installed in the empty grooves 13;

[0130] The sewage tank 4 is installed on the sewage tank installation opening 14 for receiving sewage or oil stains flowing down from the sewage tank installation opening 14;

[0131] A cleaning mechanism 22 is movably installed on the housing body 1 on both sides of the window and is in contact connection with the panel 21;

[0132] A cleaning system 5 penetrates through the housing body 1 and then extends into the volute component 3 and the surface of the panel 21 respectively.

[0133] Specifically, a first inlet pipe hole 11 is arranged on the left side wall of the housing body 1, and the first inlet pipe hole 11 is used for the first branch pipe 53 to penetrate into.

[0134] As a further improvement of the utility model, a filter screen 211 is arranged in the middle of the panel 21, and part of the oil carried by the flue gas can be absorbed and attached to the filter screen 211; an annular guide ring is arranged on the periphery of the filter screen 211; guide rails 212 are respectively arranged on the opposite sides of the guide ring; a sliding block 223 is slidably arranged in the guide rails 212, and a middle connecting rod 224 in the cleaning mechanism 22 is connected with the sliding block 223.

[0135] Furthermore, third inlet pipe holes 213 are respectively arranged on both sides of the top of the panel 21 for two small spray heads 51 to penetrate through, and the small spray heads 51 provide cleaning agents or hot water for cleaning the panel 21.

[0136] To solve the problem that it is difficult to clean the oil stains on the panel 21 of the range hood, the oil stains on the impeller and the interior of the volute, the present utility model provides a self-cleaning device, which comprises a cleaning mechanism 22 and a cleaning system 5. The cleaning mechanism 22 includes a cleaning shovel, a slide rail, a slider, and a gear transmission system 15; the cleaning system 5 includes a cleaning agent supply pipe system and a spray head, and provides a self-cleaning control logic to realize the self-cleaning of the panel 21 structure, perform self-cleaning regularly, keep the panel 21 clean and tidy as a whole, and improve user comfort; at the same time, the provided cleaning agent supply pipeline system is connected to the volute assembly 3, and a control logic is provided to realize the cleaning of the centrifugal impeller 32 of the range hood and the interior of the volute.

[0137] As Figure 22 shown, the control method of the self-cleaning device provided by the present utility model includes the following steps:

[0138] Step S1, start the cleaning mode;

[0139] Step S2, control the cleaning system 5 to spray degreasing agent on the panel 21, the volute, and the centrifugal impeller 32, including:

[0140] Control the solenoid valve 55 to open the port communicating with the degreasing agent supply pipe;

[0141] Open the four-way spray head 52, the centrifugal impeller 32, and the small spray head 51 to spray degreasing agent on the inner wall of the volute, the centrifugal impeller 32, and the panel 21;

[0142] After continuously spraying for the third set time, close the four-way spray head 52 and the small spray head 51; the third set time can be selected as 2 minutes;

[0143] After waiting for the fourth set time, close the centrifugal impeller 32. The fourth set time can be taken as 30 seconds;

[0144] Step S3, after standing for the first set time, control the cleaning mechanism 22 to start for at least one physical cleaning of the panel 21, including:

[0145] Lift the cleaning shovel;

[0146] Control the cleaning shovel to move to the top position of the panel 21;

[0147] Lower the cleaning shovel to fit on the panel 21, and then control the cleaning shovel to move downward along the surface of the panel 21 for one surface cleaning.

[0148] The first set time can be 10 minutes.

[0149] Step S4, after standing for the second set time, control the cleaning system 5 to spray hot water on the panel 21, the volute, and the centrifugal impeller 32, including:

[0150] Control the solenoid valve 55 to open the port communicating with the hot water supply pipe;

[0151] Turn on the four-way nozzle 52, the centrifugal fan blade 32 and the small nozzle 51 to spray hot water onto the inner wall of the volute, the centrifugal fan blade 32 and the panel 21;

[0152] After continuously spraying for the third set time, turn off the four-way nozzle 52 and the small nozzle 51;

[0153] After waiting for the fourth set time, turn off the centrifugal fan blade 32;

[0154] Take out the sewage tank 4 to pour out the sewage, and end the cleaning process.

[0155] The second set time for standing still can be 1 minute.

[0156] Embodiment 1:

[0157] As Figure 23 shown, in this embodiment, when the self-cleaning mode is turned on, the solenoid valve 55 controls the access of the degreaser. The degreaser enters the four-way nozzle 52 and the small nozzle 51 from the first branch pipe 53, the second branch pipe 54 and the third branch pipe 56 respectively through the pipeline system. The small nozzle 51 is turned on, and the degreaser flows through the entire panel 21 to start separating the oil dirt, then flows out from the bottom through hole, and then flows into the sewage tank 4. It is continuously sprayed for 2 minutes, and then the small nozzle 51 is turned off and left standing for 10 minutes. At the same time, the four-way nozzle 52 is turned on, the centrifugal fan blade 32 is turned on, and the degreaser is sprayed onto the centrifugal fan blade 32 and the inner wall of the volute. Further, the sewage is introduced into the sewage tank 4 through the water outlet 34 (the water outlet 34 to the sewage tank 4 can be introduced by a water pipe and is usually in a closed state and will only be opened when entering the self-cleaning mode). It is continuously sprayed for 2 minutes, the four-way nozzle 52 is turned off, and the centrifugal fan blade 32 is turned off after waiting for 30 seconds. After standing still for 10 minutes, the drive box is turned on. The second drive motor, that is, the stepping motor, starts first, raises the cleaning shovel, further turns on the first drive motor, that is, the DC motor, moves the cleaning mechanism to position one, turns on the stepping motor to reset the cleaning shovel to contact the panel 21, and further turns on the DC motor to move the cleaning mechanism from position one through position two to position three. Thus, one cleaning is completed, and this step is repeated multiple times, for example, it can be repeated 3 times. When the cleaning mechanism moves to position one, the solenoid valve 55 controls the pipeline to access the water heater pipe, and hot water is introduced to clean the panel 21 and the volute assembly 3 again through the four-way nozzle 52 and the small nozzle 51. Finally, the cleaning assembly is reset to position three, and the self-cleaning mode ends.

[0158] Here, it should be noted first that "inward" is the direction towards the center of the accommodation space, and "outward" is the direction away from the center of the accommodation space.

[0159] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the attached Figure 1 orientation or positional relationship shown, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation on the present utility model.

[0160] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0161] In the present utility model, unless otherwise clearly specified and defined, the terms "mounted", "connected", "connected to", "fixed", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0162] In the present utility model, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0163] In the description of this specification, the description referring to terms such as "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0164] As described above, it is only the specific implementation manner of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model can easily think of changes or substitutions, which should all be covered within the protection scope of the present utility model. Therefore, the protection scope of the present utility model should be subject to the protection scope of the claims.

Claims

1. A range hood self-cleaning device, characterized in that: It includes a cleaning mechanism and a cleaning system; wherein: The cleaning mechanism is movably arranged on the range hood panel and can reciprocate along the panel surface to physically and automatically clean the range hood panel; The cleaning system is arranged in the panel and volute assembly of the range hood to automatically clean the panel, volute and fan blades by chemical methods.

2. The range hood self-cleaning device according to claim 1, characterized in that: The cleaning mechanism comprises a cleaning shovel, a gear transmission system, a middle connecting rod, a guide rail, a first driving motor and a second driving motor; wherein: The guide rail is arranged on the periphery of the filter screen in the middle of the panel; The middle connecting rod is slidably arranged in the guide rail in a front-rear and left-right limited manner; The gear transmission system is arranged at both ends of the panel; There are two sets of cleaning shovels, which are respectively arranged between the guide rail and the gear transmission system, and one end of the cleaning shovel is connected to the gear transmission system, and the other end is connected to the middle connecting rod; The first drive motor is in transmission connection with one of the gear transmission systems; The second driving motor is installed on two sets of the gear transmission systems and is transmission-connected to the two sets of the cleaning shovels.

3. The range hood self-cleaning device according to claim 2, characterized in that: The middle connecting rod is a telescopic middle connecting rod.

4. The range hood self-cleaning device according to claim 3, characterized in that: The cleaning shovel is a retractable cleaning shovel.

5. The range hood self-cleaning device according to claim 2, characterized in that: The gear transmission system includes a slide, a rack, a gear, and a drive box; wherein: The slide grooves are arranged on both sides of the rack; The gear is rotatably mounted in the drive box; The cleaning shovel is connected to the second driving motor in the driving box; The drive box is in a U-shaped structure, and the two free ends are slidably arranged in the slide groove in a limited manner; The gear is meshingly connected with the rack, and the drive motor is transmission-connected with one of the gears.

6. The range hood self-cleaning device according to claim 1, characterized in that: The cleaning system includes a first branch pipe, a second branch pipe, a third branch pipe, a small nozzle, a four-way nozzle, and a solenoid valve; wherein: One end of the solenoid valve is connected to the degreasing agent supply pipe and the hot water supply pipe respectively, and the other end is connected to the first branch pipe; The end of the first branch pipe is connected to the four-way nozzle; The four-way nozzle is placed in the volute assembly and outside the centrifugal fan blade; One end of the second branch pipe is connected to the first branch pipe; The third branch pipe is connected to the other end of the second branch pipe; The small nozzles are respectively arranged at two ends of the third branch pipe and located at the top of both sides of the panel.

7. A range hood, characterized in that: It comprises an outer shell, a volute assembly, a sewage tank, a panel and a self-cleaning device as described in any one of claims 1 to 6; wherein: The front side of the outer shell is provided with a window for installing the panel; A flue groove is provided on the top of the outer shell; The volute assembly is arranged in the outer shell, and the flue passes through the flue groove; The panel covers the window; A sewage tank installation opening is provided at the bottom of the outer shell; The sewage tank is installed on the sewage tank installation opening; The cleaning mechanism is movably mounted on the outer shell on both sides of the window and is in contact with and connected to the panel; The cleaning system passes through the outer shell and extends into the volute assembly and the panel surface respectively.

8. The range hood according to claim 7, characterized in that: A filter is arranged in the middle of the panel; an annular guide ring is arranged around the filter; guide rails are arranged on opposite sides of the guide ring; a slider is slidably arranged in the guide rail, and the middle connecting rod in the cleaning mechanism is connected to the slider.

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