An inner cleaning assembly and a range hood having the same

Abstract

The present application relates to the technical field of range hood, and discloses an inner cleaning assembly and a range hood with the same. The inner cleaning assembly comprises a panel, a back plate, a damper plate and a cleaning device. The panel is provided with an air inlet. The back plate and the panel form an air collecting cavity. The damper plate has a shielding surface. The cleaning device is arranged in the air collecting cavity. The inner cleaning assembly has a damper plate cleaning state and an air collecting cavity inner wall cleaning state. In the damper plate cleaning state, the air inlet is opened, and the cleaning device cleans the shielding surface. In the air collecting cavity inner wall cleaning state, the shielding surface shields the air inlet, and the cleaning device is started and cleans the air collecting cavity inner wall. Compared with the prior art, the inner cleaning assembly can not only clean the air collecting cavity inner wall of the range hood after the range hood is turned off and the air inlet is closed, but also clean the shielding surface when the air inlet is opened. Thus, the appearance of the panel side of the range hood remains clean when the shielding surface shields the air inlet.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of range hood, in particular, to an inner cleaning assembly and a range hood with the same. BACKGROUND

[0002] The range hood is a kind of kitchen appliance for purifying kitchen environment, which can rapidly remove the waste of stove combustion and the oil fume generated in the cooking process and discharge it outdoor, so as to reduce pollution and purify air. When the range hood is working, the airflow formed by the oil fume flows to the air inlet on the panel of the range hood under the action of the exhaust fan, and enters the air collecting box connected with the air inlet, and finally is discharged from the exhaust air duct under the action of the exhaust fan in the air collecting box. After the range hood works for a long time, the mixture of oil and water in the oil fume will adhere to and accumulate on the inner wall surface of the air collecting box. When the dust in the external air enters the air collecting box through the air inlet on the panel, the dust will mix with the mixture of oil and water on the inner wall surface of the air collecting box to form dirt, which adheres to the inner wall surface of the air collecting box and the shell of the exhaust fan. The dirt formed by the oil, water and dust has relatively large viscosity, and is difficult to drop from the inner wall surface of the air collecting box and the shell of the exhaust fan. When the accumulation amount of the dirt is relatively large, the purification effect of the range hood will be affected, and the user needs to disassemble the range hood to clean the dirt completely, and the dirt is also difficult to clean. SUMMARY

[0003] The present application aims to provide an inner cleaning assembly and a range hood with the same, which are used to solve the above technical problems.

[0004] An inner cleaning assembly for a range hood, comprising:

[0005] a panel, on which an air inlet is arranged;

[0006] a back plate, which is arranged correspondingly to the panel, and a collecting cavity is formed between the back plate and the panel, and a guide rail is arranged in the collecting cavity;

[0007] a damper plate, which is slidably connected to the guide rail, and the damper plate has a shielding surface for shielding the air inlet and forming the appearance surface of the panel;

[0008] a cleaning device, which is arranged in the collecting cavity;

[0009] wherein the inner cleaning assembly has a damper plate cleaning state and a collecting cavity inner wall cleaning state, in the damper plate cleaning state, the shielding surface of the damper plate faces the cleaning device, the air inlet is opened, and the cleaning device cleans the shielding surface; in the collecting cavity inner wall cleaning state, the shielding surface of the damper plate shields the air inlet, and the cleaning device is started and cleans the side of the damper plate facing the back plate and the inner side of the back plate.

[0010] According to an embodiment of the present application, the driving device is connected with the damper plate, the damper plate has a first position and a second position on the guide rail, in the first position, the shielding surface of the damper plate shields the suction port, the suction port is closed, in the second position, the shielding surface of the damper plate faces the cleaning device, the suction port is opened, the driving device drives the damper plate to move between the first position and the second position.

[0011] According to an embodiment of the present application, the guide rail has an included angle connecting the first position and the second position, the included angle makes the damper plate form an included angle of 15°-45° with the inner wall surface of the panel when the damper plate is in the second position.

[0012] According to an embodiment of the present application, the inner cleaning assembly has a state of closing the suction port, when the damper plate moves from the second position to the first position on the guide rail, the inner cleaning assembly is switched from the damper plate cleaning state to the state of closing the suction port, at this time, the cleaning device is closed, when the cleaning device is opened, the inner cleaning assembly is switched from the state of closing the suction port to the inner wall cleaning state of the air collecting cavity.

[0013] According to an embodiment of the present application, the cleaning device includes a brush assembly; or / and the cleaning device includes a spraying assembly, in the damper plate cleaning state, the spraying assembly operates, and the exhaust fan of the range hood operates.

[0014] According to an embodiment of the present application, the damper plate has a normal air supply state, the damper plate has a guide opening, the damper plate has a third position on the guide rail, in the third position, the guide opening corresponds to the suction port, and the suction port is opened.

[0015] According to an embodiment of the present application, the cleaning device includes a brush assembly, the brush assembly includes a rotating brush facing the shielding surface, the rotating brush has an elastic brush head, the brush head elastically contacts and cleans the shielding surface; or / and the cleaning device includes a spraying assembly, the spraying assembly includes a water supply pipeline and a cleaning nozzle facing the shielding surface, the water supply pipeline is horizontally arranged along the shielding surface, and a plurality of cleaning nozzles are arranged along the water supply pipeline.

[0016] A range hood adopts the above-mentioned inner cleaning assembly, and further includes an exhaust fan arranged in the air collecting cavity, when the shielding surface of the damper plate shields the suction port, the exhaust fan is closed, when the shielding surface of the damper plate is away from the suction port, the suction port is opened, and the exhaust fan operates.

[0017] According to an embodiment of the present application, the PM2.5 detection module capable of detecting the ambient air quality in real time and the display control device capable of displaying the detection data of the PM2.5 detection module are further included, the inner cleaning assembly, the exhaust fan and the PM2.5 detection module are electrically connected with the display control device, when the detection value of the PM2.5 detection module reaches the set range, the display control device sends the start-up instruction to the exhaust fan and the inner cleaning assembly, the air door plate opens the air inlet, and the exhaust fan enters the running state; or when the detection value of the PM2.5 detection module reaches the set range, the display control device sends the start-up instruction to the exhaust fan and the inner cleaning assembly, the inner cleaning assembly enters the air door plate cleaning state, and the exhaust fan enters the running state.

[0018] According to an embodiment of the present application, the bottom of the air collecting cavity is provided with an oil leakage hole and an oil cup for receiving the oil stains flowing out of the oil leakage hole, and the oil cup is provided with a liquid level sensor; when the inner cleaning assembly is in the air collecting cavity inner wall cleaning state, the cleaning device adjusts the spraying time according to the amount of oil stains collected in the oil cup, and stops running after the spraying time is reached; when the inner cleaning assembly is in the air door plate cleaning state, the cleaning device stops running after working for 1-5 minutes.

[0019] Compared with the prior art, the inner cleaning assembly of the present application has the following advantages:

[0020] The inner cleaning assembly of the present application, when applied to the extractor hood, can not only clean the air collecting cavity inner wall of the extractor hood after the extractor hood is turned off and the air inlet is closed, but also clean the shielding surface shielding the air inlet when the air inlet is opened, so that the appearance of the panel side of the extractor hood remains clean when the shielding surface shields the air inlet. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 Structure diagram of the extractor hood with the inner cleaning assembly of the present application after the back plate is removed;

[0022] Figure 2 Exploded view of the guide rail, air door plate and driving device of the inner cleaning assembly of the present application;

[0023] Figure 3 Front view of the extractor hood with the inner cleaning assembly of the present application;

[0024] Figure 4 is Figure 3 Cross-sectional view in direction A-A;

[0025] Figure 5 is Figure 4 Local enlarged view of B;

[0026] Figure 6 Exploded view of one embodiment of the brush assembly of the extractor hood of the present application;

[0027] Figure 7 An exploded view of another embodiment of the brush assembly of the range hood of the present application;

[0028] In the figure: 1. panel, 11. air inlet, 2. back plate, 3. guide rail, 31. first section, 32. second section, 4. damper plate, 41. air guide opening, 42. bulge, 43. gasket, 44. bearing, 45. shock absorbing piece, 5. cleaning device, 51. rotating brush, 54. fixed support, 55. brush rotation driving piece, 59. brush up and down driving structure, 52. water supply pipeline, 53. cleaning nozzle, 56. support assembly, 57. rotation driving structure, 571. rotation driving motor, 572. first connecting rod, 573. second connecting rod, 574. third connecting rod, 58. up and down driving structure, 6. driving device, 7. exhaust fan, 8. PM2.5 detection module, 9. display control device, 10. oil cup

[0029] The implementation of the functions and advantages of the present application will be further described with reference to the embodiments in conjunction with the accompanying drawings. DETAILED DESCRIPTION

[0030] In the following, a plurality of embodiments of the present application will be disclosed with reference to the drawings. For the purpose of clear illustration, a plurality of practical details will be described in the following description. However, it should be appreciated that these practical details should not be used to limit the present application. That is, in some embodiments of the present application, these practical details are not necessary. In addition, for the purpose of simplifying the drawings, some conventional structures and components will be shown in the drawings in a simple schematic manner.

[0031] It should be noted that all directional references (such as upper, lower, left, right, front, rear, etc.) used herein are in connection with the orientation in the drawings to which they are attached.

[0032] In addition, the description such as "first", "second" and the like in the present application is only for the purpose of description, and is not particularly intended to indicate the order or sequence, nor is it intended to limit the present application. It is merely for the purpose of distinguishing between components or operations described by using the same technical terms. It should not be understood as indicating or implying that the indicated technical features are of relative importance or that a certain technical feature is necessary to the technical scheme. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of a person skilled in the art. When the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, nor is it within the scope of protection required by the present application.

[0033] In order to further understand the content, characteristics and effects of the present application, the following examples are given and described in detail below with reference to the accompanying drawings.

[0034] The present application discloses an inner cleaning assembly, the inner cleaning assembly is used for an oil fume extractor, the inner cleaning assembly can not only close the air inlet after the oil fume extractor is turned off, but also clean the shielding surface for shielding the air inlet when the air inlet is opened, so that the appearance of the panel side of the oil fume extractor remains clean. Please refer to Figure 1 The inner cleaning assembly comprises a panel 1, a back plate 2, a damper plate 4 and a cleaning device 5, the panel 1 is provided with an air inlet 11; the back plate 2 is correspondingly arranged on the panel 1, a wind collecting cavity is formed between the back plate 2 and the panel 1, the air inlet 11 is communicated with the wind collecting cavity, and a guide rail 3 is arranged in the wind collecting cavity; the damper plate 4 is slidingly connected to the guide rail 3, the damper plate 4 has a shielding surface for shielding the air inlet 11 and forming the appearance surface of the panel 1; the cleaning device 5 is arranged in the wind collecting cavity; wherein, the inner cleaning assembly has a damper plate cleaning state and a wind collecting cavity inner wall cleaning state, in the damper plate cleaning state, the shielding surface of the damper plate 4 faces the cleaning device 5, the air inlet 11 is opened, and the cleaning device 5 cleans the shielding surface; in the wind collecting cavity inner wall cleaning state, the shielding surface of the damper plate 4 shields the air inlet 11, the cleaning device 5 is started and cleans the side of the damper plate 4 facing the back plate 2 and the inner side of the back plate 2. When the inner cleaning assembly is applied to the oil fume extractor, the exhaust fan of the oil fume extractor is arranged in the wind collecting cavity, after the oil fume extractor is turned on, the exhaust fan is started, the damper plate 4 opens the air inlet 11, and the external oil fume can enter the wind collecting cavity through the air inlet 11 under the action of the exhaust fan, and then be discharged from the wind collecting cavity by the exhaust fan, when the shielding surface of the damper plate 4 needs to be cleaned, the inner cleaning assembly enters the damper plate cleaning state, at this time, the shielding surface of the damper plate 4 faces the cleaning device 5, the cleaning device 5 is started and cleans the shielding surface of the damper plate 4, so that the shielding surface is cleaned, when the oil fume extractor is turned off and the exhaust fan is turned off, the damper plate 4 moves on the guide rail 3 and shields the air inlet 11, the part of the shielding surface corresponding to the air inlet 11 forms the appearance surface of the panel 1, since the shielding surface has been cleaned, the shielding surface seen from the user side is clean, so that the appearance surface of the panel side of the oil fume extractor remains clean; after the air inlet is closed, the user can start the wind collecting cavity inner wall cleaning state according to the needs, the cleaning device 5 is started and cleans the side of the damper plate 4 facing the back plate 2 and the inner side of the back plate 2, so that the wind collecting cavity inner wall is cleaned, and the self-cleaning function of the oil fume extractor is realized.

[0035] Since the damper plate 4 is located in the air collecting cavity, the panel 1 has a thickness, when the damper plate 4 closes the air inlet 11, even if the blocking surface of the damper plate 4 closely adheres to the inner wall surface of the panel 1, the air inlet 11 still forms a groove in the thickness direction of the panel 1, so that the outer side surface of the panel 1 is not a complete plane, which affects the flatness of the appearance of the panel side of the range hood; and after the oil fume passes through the air inlet 11, the mixture of oil and water will be attached to the inner wall surface of the air inlet 11, and dirt is easily generated in the groove formed by the blocking surface shielding the air inlet 11, which is inconvenient for the user to clean. Figures 2 to 5 In order to solve this problem, the inner cleaning assembly of the present application, the blocking surface is provided with a bulge part 42 protruding towards the air inlet 11, the bulge part 42 is matched with the air inlet 11, when the blocking surface of the damper plate 4 shields the air inlet 11, the bulge part 42 extends into the air inlet 11 and the top surface of the bulge part 42 is flush with the outer side surface of the panel 1, when the damper plate 4 closes the air inlet 11, the bulge part 42 on the blocking surface extends into the air inlet 11 and shields the air inlet 11, after the bulge part 42 extends into the air inlet 11, the top surface of the bulge part 42 is flush with the outer side surface of the panel 1, the top surface of the bulge part 42 and the outer side surface of the panel 1 are located in the same plane, which is convenient for the user to clean the panel 1 of the range hood.

[0036] Please refer to Figure 5 The inner cleaning assembly of the present application, the side wall of the bulge part 42 is provided with a deformable gasket 43; when the damper plate 4 closes the air inlet 11, the damper plate 4 closely adheres to the panel 1, the bulge part 42 extends into the air inlet 11, the top surface of the bulge part 42 is flush with the outer side surface of the panel 1, the gasket 43 on the side wall of the bulge part 42 is pressed together with the side wall surface of the air inlet 11 and seals the air inlet 11, which can make the bulge part 42 seal the air inlet 11 tightly.

[0037] Please refer to Figure 1The inner cleaning assembly of the present application further comprises a driving device 6 connected with the damper plate 4, the damper plate 4 has a first position and a second position on the guide rail 3, in the first position, the shielding surface of the damper plate 4 shields the suction port 11, the suction port 11 is closed, in the second position, the shielding surface of the damper plate 4 faces the cleaning device 5, the suction port 11 is opened, the driving device 6 drives the damper plate 4 to move between the first position and the second position. The inner cleaning assembly of the present application, the driving device 6 drives the damper plate 4 to move on the guide rail 3, when the damper plate 4 moves to the first position, the shielding surface of the damper plate 4 shields the suction port 11, the suction port 11 is closed, when the damper plate 4 moves to the second position, the suction port 11 is opened, the shielding surface of the damper plate 4 faces the cleaning device 5, when the cleaning device 5 is started, the shielding surface of the damper plate 4 can be cleaned. When applied to the range hood, in the case that the range hood is turned off, the damper plate 4 is in the first position on the guide rail 3, the suction port 11 is in the closed state, when the range hood is turned on, the driving device 6 drives the damper plate 4 to move on the guide rail 3, the damper plate 4 opens the suction port 11, when the exhaust fan of the range hood is started, the external oil fume can enter the air collecting cavity through the suction port 11 under the action of the exhaust fan, when the user needs to clean the shielding surface of the damper plate 4, the inner cleaning assembly enters the damper plate cleaning state, the driving device 6 drives the damper plate 4 to move on the guide rail 3 and moves the damper plate 4 to the second position, the shielding surface of the damper plate 4 faces the cleaning device 5, the cleaning device 5 is started and cleans the shielding surface of the damper plate 4. When the inner cleaning assembly enters the damper plate cleaning state, since the suction port 11 is opened, at this time, the exhaust fan of the range hood can still be in the running state, when the range hood is finished working, the driving device 6 drives the damper plate 4 to return to the first position, the clean shielding surface shields the suction port 11, the appearance surface of the panel 1 seen from the user side is clean and tidy.

[0038] The inner cleaning assembly of the present application has an included angle between the first position and the second position on the guide rail 3, which makes the damper plate 4 away from the panel 1 and forms an included angle of 15°-45° with the inner wall surface of the panel 1 when the damper plate 4 is in the second position. The included angle between the first position and the second position makes the damper plate 4 in different planes when the damper plate 4 is in the first position and in the second position on the guide rail 3. As known, when the damper plate 4 is in the first position on the guide rail 3, the shielding surface of the damper plate 4 shields the suction port 11, and the damper plate 4 needs to be close to the inner wall surface of the panel 1 so that the shielding surface can seal the suction port 11. When the damper plate 4 is in the second position on the guide rail 3, the shielding surface of the damper plate 4 faces the cleaning device 5, which is arranged between the damper plate 4 and the panel 1. Therefore, the first position of the damper plate 4 on the guide rail 3 is a plane close to the panel 1, and the second position of the damper plate 4 on the guide rail 3 is a plane inclined to the direction of the back plate 2 relative to the panel 1. When the damper plate 4 is in the second position on the guide rail 3, the damper plate 4 forms a containing cavity with the inner wall surface of the panel 1, and the cleaning device 5 is arranged in the containing cavity to clean the shielding surface. It should be understood that when the damper plate 4 is in the second position on the guide rail 3, the damper plate 4 is arranged in an inclined manner, and the lower end of the damper plate 4 extends to the direction of the back plate 2. If the inclination angle of the damper plate 4 is too large, the lower end of the damper plate 4 will contact the back plate 2 when the damper plate 4 is in the second position, which will hinder the mixture of oil and water on the exhaust fan from flowing to the bottom of the air collecting cavity. If the inclination angle of the damper plate 4 is too small, the gap between the damper plate 4 and the panel 1 will be insufficient to accommodate the cleaning device 5. Therefore, the damper plate 4 is arranged to be away from the panel 1 and form an included angle of 15°-45° with the inner wall surface of the panel 1 when the damper plate 4 is in the second position, so that the gap between the damper plate 4 and the inner wall surface of the panel 1 is sufficient to accommodate the cleaning device 5, and when the cleaning device 5 is arranged between the damper plate 4 and the panel 1, there is still a gap between the cleaning device 5 and the panel 1, and the damper plate 4 does not affect the mixture of oil and water on the exhaust fan in the air collecting cavity from dripping to the bottom of the air collecting cavity.

[0039] Please refer to Figure 2The inner cleaning assembly of the present application, the guide rail 3 comprises a first direction section 31 and a second direction section 32, the first position of the damper plate 4 on the guide rail 3 is located on the first direction section 31, the second position of the damper plate 4 on the guide rail 3 is located on the second direction section 32, when the damper plate 4 slides on the first direction section 31, the bulge part 42 on the shielding surface extends from the air inlet 11 or is staggered with the air inlet 11; when the damper plate 4 moves to the second position on the second direction section 32 of the guide rail 3, the damper plate 4 is in an inclined state, and the cleaning device 5 cleans the bulge part 42. The first direction section 31 and the second direction section 32 are in different planes, when the first direction section 31 is close to the inner wall surface of the panel 1, there is a gap between the second direction section 32 and the inner wall surface of the panel 1, the first position is located on the first direction section 31, and the second position is located on the second direction section 32, when the damper plate 4 slides on the first direction section 31, the bulge part 42 on the shielding surface extends from the air inlet 11 to close the air inlet 11, or the bulge part 42 on the shielding surface is staggered with the air inlet 11 to open the air inlet 11; when the driving device 6 drives the damper plate 4 to move along the guide rail 3 and moves from the first direction section 31 to the second direction section 32, when the damper plate 4 moves to the second position on the second direction section 32, the damper plate 4 is in an inclined state, and the damper plate 4 and the panel 1 form a containing cavity capable of containing the cleaning device 5, when the cleaning device 5 is started, the cleaning device 5 can clean the shielding surface and the bulge part 42 on the shielding surface. It should be understood that when the damper plate 4 moves to the second position on the second direction section 32, the entire damper plate 4 moves below the air inlet 11, at this time the air inlet 11 is still in an open state, and when the exhaust fan of the range hood is started, external air can still enter the air collecting cavity through the air inlet 11 and then be discharged by the exhaust fan; that is, when the damper plate 4 is in the second position, the cleaning device 5 cleans the shielding surface of the damper plate 4, which does not affect the operation of the range hood, and after the exhaust fan is closed, the driving device 6 can transport the damper plate 4 with the cleaned shielding surface to the first position to close the air inlet 11, the clean bulge part 42 extends from the air inlet 11, and the outside of the panel 1 remains clean and tidy.

[0040] Please refer to Figure 1The switch air suction port assembly of the present application is provided with a first support arranged transversely in the air collecting cavity, the driving device 6 is arranged on the first support, the driving end of the driving device 6 is fixedly connected to the lower end of the air door plate 4 and can drive the air door plate 4 to slide along the guide rail 3; the two sides of the air door plate 4 are provided with bearings 44 which can slide on the guide rail 3, and the bearings 44 are sleeved with damping members 45. When the driving device 6 is started, the driving device 6 drives the air door plate 4 to slide along the guide rail 3, when the air door plate 4 slides along the guide rail 3, the bearings 44 on the two sides of the air door plate 4 slide along the guide rail 3, which can reduce the friction between the air door plate 4 and the guide rail 3, and because the bearings 44 are provided with the damping members 45, the damping members 45 can reduce the vibration generated when the bearings 44 slide along the guide rail 3, so that the driving device 6 drives the air door plate 4 to slide along the guide rail 3 more smoothly.

[0041] In some embodiments, the driving device 6 adopts a driving motor, the output end of the driving motor is connected with an output gear, the output gear is engaged with a rack, the rack is connected with the air door plate 4, when the driving motor is started, the output end of the driving motor drives the output gear to rotate, the output gear is engaged with the rack and drives the rack to move up and down, thereby making the air door plate 4 slide along the guide rail 3.

[0042] In some other embodiments, the driving device 6 adopts a driving motor, the output end of the driving motor is connected with a lead screw, a lead screw nut is sleeved on the lead screw, the lead screw nut is connected with the air door plate 4, when the driving motor is started, the output end of the driving motor drives the lead screw to rotate, the lead screw nut slides up and down along the lead screw, thereby making the air door plate 4 slide along the guide rail 3.

[0043] Please refer to Figure 1 and Figure 2 In the illustrated embodiment, the driving device 6 adopts an electric push rod, the driving end of the electric push rod is connected with the air door plate 4, when the electric push rod is started, the electric push rod drives the air door plate 4 to slide along the guide rail 3.

[0044] The inner cleaning assembly of the present application also has a state of closing the air inlet, when the damper plate 4 moves on the guide rail 3 from the second position to the first position, the inner cleaning assembly is switched from the state of cleaning the damper plate to the state of closing the air inlet, at this time the cleaning device 5 is closed, when the cleaning device 5 is opened, the inner cleaning assembly is switched from the state of closing the air inlet to the state of cleaning the inner wall of the air collecting cavity. When applied to the range hood, after the exhaust fan is turned off, the inner cleaning assembly enters the state of closing the air inlet, at this time the cleaning device 5 is closed, after the damper plate 4 moves to the first position and the shielding surface of the damper plate 4 shields the air inlet 11, the air inlet 11 is closed, at this time the inner cleaning assembly is turned off and is in the state of closing the air inlet, when the inner wall of the air collecting cavity needs to be cleaned, the user can start the cleaning device 5 in the state of closing the air inlet, so that the inner cleaning assembly is switched from the state of closing the air inlet to the state of cleaning the inner wall of the air collecting cavity, in the state of closing the air inlet, the cleaning device 5 completes the cleaning of the inner wall of the air collecting cavity, which can avoid the sewage flowing to the outside of the panel 1 along the air inlet 11 when the inner wall of the air collecting cavity is cleaned, affecting the appearance of the panel 1.

[0045] The inner cleaning assembly of the present application, when the damper plate 4 is in the first position on the guide rail 3, the inner cleaning assembly can enter the state of cleaning the inner wall of the air collecting cavity, the cleaning device 5 is started and cleans the side of the damper plate 4 facing the back plate 2 and the inner side of the back plate 2. When applied to the range hood, after the exhaust fan is turned off, if the user needs to clean the air collecting cavity, at this time the inner cleaning assembly will enter the state of cleaning the inner wall of the air collecting cavity, the damper plate 4 closes the air inlet, and the cleaning device 5 is started, the cleaning device cleans the side of the damper plate 4 facing the back plate 2 and the inner side of the back plate 2 in the air collecting cavity, and cleans the inner wall of the air collecting cavity, so that the mixture of oil and water attached to the inner wall of the air collecting cavity is cleaned, and the inner cleaning assembly can realize automatic cleaning of the air collecting cavity of the range hood.

[0046] Please refer to Figure 1In some embodiments, the cleaning device 5 of the inner cleaning assembly of the present application comprises a spraying assembly, which is operated when the baffle plate cleaning state and the exhaust fan of the range hood is operated. The spraying assembly comprises a water supply pipe 52 and cleaning nozzles 53 facing the baffle surface, the water supply pipe 52 is horizontally arranged along the baffle surface, and a plurality of cleaning nozzles 53 are arranged along the water supply pipe 52. When the baffle plate 4 is moved to the second position on the guide rail 3, the baffle surface of the baffle plate 4 faces the spraying assembly, the spraying assembly is started, the cleaning medium is introduced into the water supply pipe 52, and then enters the cleaning nozzles 53 from the water supply pipe 52, and then is sprayed out from the cleaning nozzles 53, the cleaning nozzles 53 spray the cleaning medium towards the baffle surface to clean the baffle surface. When the baffle plate 4 is moved to the second position on the guide rail 3, the air inlet 11 is opened, and at this time the exhaust fan of the range hood is operated, and there is a gap between the baffle plate 4 and the panel 1. When the spraying assembly is started and the baffle surface is cleaned, the cleaning nozzles 53 of the spraying assembly spray the cleaning medium onto the baffle surface, and the baffle surface is washed by the cleaning medium to clean the oil stains on the baffle surface. When the cleaning nozzles 53 spray the cleaning medium onto the baffle surface, the cleaning medium will splash when it is sprayed onto the baffle surface, and the water splashes will splash from the gap between the baffle surface and the inner wall surface of the panel 1. At this time, since the exhaust fan is operated, the exhaust fan will form a negative pressure at the air inlet 11, and the air outside the panel 1 will be sucked into the air collecting chamber through the air inlet 11 under the negative pressure. Therefore, when the cleaning nozzles 53 clean the baffle surface, the water splashes generated by the cleaning medium will fall into the air collecting chamber under the action of the air flow entering through the air inlet 11, and cannot splash out from the air inlet 11. It can be avoided that the cleaning medium splashes out from the air inlet 11 and falls into the food material in cooking.

[0047] Please refer to Figure 1The inner cleaning assembly and the spraying assembly of the present application further comprise a support assembly 56 arranged on the inner wall of the air collecting cavity, the water supply pipeline 52 is arranged on the support assembly 56, and the support assembly 56 is provided with a rotating driving structure 57 capable of driving the water supply pipeline 52 to rotate; the inner wall of the air collecting cavity is further provided with a guide structure capable of sliding the support assembly 56, and the guide structure is provided with an up-down driving structure 58 for driving the support assembly 56 to slide along the guide structure. When the switch air suction port assembly of the present application is applied to the range hood, during the operation of the range hood, the driving device 6 drives the damper plate 4 to move on the guide rail 3, so that the damper plate 4 moves to the second direction section 32 of the guide rail 3 and is located at the second position, at this time, the damper plate 4 is located below the air suction port 11, the air suction port 11 is opened, the exhaust fan is started, the damper plate 4 is arranged obliquely relative to the panel 1, the spraying assembly is located between the damper plate 4 and the panel 1, and this position is set as the first cleaning position of the spraying assembly. After the exhaust fan of the range hood is started, the external oil fume begins to enter the air collecting cavity through the air suction port 11, the oil fume entering the air collecting cavity flows to the exhaust fan of the range hood and is discharged from the air collecting cavity by the exhaust fan. During the process that the exhaust fan is started and the oil fume is sucked, the spraying assembly is started at the first cleaning position, the up-down driving structure 58 does not operate, the cleaning medium provided from outside enters the water supply pipeline 52 and is transported to the cleaning nozzle 53 through the water supply pipeline 52, the rotating driving structure 57 drives the water supply pipeline 52 to rotate, the cleaning nozzle 53 rotates 360° with the water supply pipeline 52 and sprays the cleaning medium, and the shielding surface of the damper plate 4 is cleaned. After the exhaust fan is closed, the driving device 6 drives the damper plate 4 to move on the guide rail 3, so that the damper plate 4 moves from the second direction section 32 of the guide rail to the first direction section 31 and moves to the first position, at this time, the shielding surface on the damper plate 4 shields the air suction port 11, the bulge portion 42 extends into the air suction port 11 and closes the air suction port 11, at this time, the cleaning device 5 is started, the up-down driving structure 58 drives the support assembly 56 to move along the guide structure on the inner wall of the air collecting cavity, and the rotating driving structure 57 starts to drive the water supply pipeline 52 to rotate around the support assembly 56, the water supply pipeline 52 drives the cleaning nozzle 53 thereon to rotate, and when the cleaning medium is transported to the cleaning nozzle 53 through the water supply pipeline 52, the cleaning nozzle 53 sprays the cleaning medium to the spraying area.

[0048] The spray area of the cleaning nozzle 53 comprises at least a first spray area corresponding to the inner wall surface of the panel 1 when the inner cleaning assembly is in the panel cleaning state. After the cleaning nozzle 53 sprays the cleaning medium into the first spray area, the inner wall surface of the panel 1 of the range hood is cleaned, and the mixture of oil and water adhering to the inner wall surface of the panel 1 of the range hood is cleaned, so that the oil stains adhering to the wall surface of the air collecting cavity and the inner wall surface of the panel 1 of the range hood can be automatically cleaned, the air collecting cavity of the range hood is kept clean, and the range hood has a better purification effect, and the user does not need to disassemble the range hood to clean the oil stains accumulated in the air collecting cavity of the range hood.

[0049] The spray area of the cleaning nozzle 53 further comprises a second spray area corresponding to the inner wall surface of the rear plate 2 when the inner cleaning assembly is in the panel cleaning state. When the inner cleaning assembly of the present application is applied to the range hood, the external oil fume enters the air collecting cavity through the air inlet 11 on the panel 1 of the range hood when the range hood is working, and is then discharged from the air collecting cavity. After the oil fume enters the air collecting cavity, it flows to the air inlet of the exhaust fan under the action of the exhaust fan of the range hood, and in the process of flowing to the exhaust fan, part of the airflow formed by the oil fume directly enters the shell of the exhaust fan through the air inlet of the exhaust fan, and the other part hits the rear plate 2, and then flows along the rear plate 2 to the air inlet of the exhaust fan, and then enters the shell of the exhaust fan, and finally is discharged from the air collecting cavity by the exhaust fan. In the whole exhaust process, after the oil fume enters the air collecting cavity through the air inlet 11, it flows to the exhaust fan. Since the exhaust fan is located above the air inlet 11, the oil fume enters the air collecting cavity through the air inlet 11 and flows upward, so that the mixture of oil and water formed by the oil fume in the air collecting cavity mainly adheres to the part of the inner wall surface of the rear plate 2 above the air inlet 11 and the part of the inner wall surface of the panel 1 above the air inlet 11 during the exhaust process. When the mixture of oil and water accumulates to a certain amount on the part of the inner wall surface of the rear plate 2 above the air inlet 11 and the part of the inner wall surface of the panel 1 above the air inlet 11, the mixture of oil and water flows from the part of the inner wall surface of the rear plate 2 above the air inlet 11 to the part of the inner wall surface of the rear plate 2 below the air inlet 11 and from the part of the inner wall surface of the panel 1 above the air inlet 11 to the part of the inner wall surface of the panel 1 below the air inlet 11. Therefore, the spray area of the cleaning nozzle 53 comprises a first spray area corresponding to the inner wall surface of the panel 1 of the range hood and a second spray area corresponding to the inner wall surface of the rear plate 2, and the cleaning nozzle 53 cleans in the first spray area and the second spray area, so that the whole inner wall of the air collecting cavity can be cleaned.

[0050] The switch air suction port assembly of the application, the spraying assembly has a second cleaning position, at the second cleaning position, the cleaning nozzle 53 is located above the air suction port 11, at this time, the exhaust fan is closed, the damper plate 4 is in the first position and the blocking surface blocks the air suction port 11, the cleaning nozzle 53 rotates 360° and sprays the cleaning medium to clean the exhaust fan and the inner wall of the air collecting cavity. After the switch air suction port assembly of the application is applied to the extractor hood, when the extractor hood works, the air guide opening 41 on the damper plate 4 corresponds to the air suction port 11, the air suction port 11 is opened, the exhaust fan is started, the external oil fume enters the air collecting cavity through the air suction port 11 on the panel 1, and then is discharged from the air collecting cavity by the exhaust fan arranged in the air collecting cavity. The exhaust fan is located above the air suction port 11, after the oil fume enters the air collecting cavity, under the action of the exhaust fan, the oil fume flows to the air inlet of the exhaust fan, enters the shell of the exhaust fan, and is discharged from the air collecting cavity by the exhaust fan; during the process that the exhaust fan sucks the oil fume, the spraying assembly is located at the first cleaning position, the user can start the spraying assembly, so that the spraying assembly cleans the blocking surface on the damper plate 4, when the spraying assembly cleans the blocking surface on the damper plate 4, the operation of the extractor hood is not affected, and after the operation of the extractor hood ends and the exhaust fan is closed, the driving device 6 can just transport the clean damper plate 4 to the first section 31 of the guide rail 3, and moves the damper plate 4 to the first position to close the air suction port 11, the clean bulge part 42 extends from the air suction port 11, the blocking surface seen from the user side is clean, and the appearance surface of the panel 1 of the extractor hood can be kept clean and neat.During the whole process of discharging fume, the fume enters the air collecting cavity through the air inlet 11 and flows to the fume discharging fan, since the fume discharging fan is located above the air inlet 11, the fume enters the air collecting cavity through the air inlet 11 and flows upward, so the mixture of oil and water formed by the fume in the air collecting cavity during the process of discharging fume mainly adheres to the part of the inner wall surface of the back plate 2 located above the air inlet 11, the part of the inner wall surface of the face plate 1 located above the air inlet 11 and the shell of the fume discharging fan, when the mixture of oil and water accumulates to a certain amount on the part of the inner wall surface of the back plate 2 located above the air inlet 11, the part of the inner wall surface of the face plate 1 located above the air inlet 11 and the shell of the fume discharging fan, the mixture of oil and water will flow to the part of the inner wall surface of the back plate 2 located below the air inlet 11 from the part of the inner wall surface of the back plate 2 located above the air inlet 11, the part of the inner wall surface of the face plate 1 located below the air inlet 11 from the part of the inner wall surface of the face plate 1 located above the air inlet 11; after the fume discharging fan is closed, the spraying assembly moves to the second cleaning position, at the second cleaning position, the cleaning nozzle 53 sprays the cleaning medium and cleans the mixture of oil and water on the part of the inner wall surface of the back plate 2 located above the air inlet 11, the part of the inner wall surface of the face plate 1 located above the air inlet 11 and the shell of the fume discharging fan, the mixture of oil and water mixed with the cleaning medium flows to the part of the inner wall surface of the back plate 2 located below the air inlet 11 from the part of the inner wall surface of the back plate 2 located above the air inlet 11, the part of the inner wall surface of the face plate 1 located below the air inlet 11 from the part of the inner wall surface of the face plate 1 located above the air inlet 11 until the cleaning nozzle 53 spraying assembly completes the cleaning work at the second cleaning position.

[0051] The switch air inlet assembly of the present application, the water pump is connected to the water supply pipeline 52 of the cleaning nozzle 53, the control valve is arranged on the water supply pipeline 52, the water pump is connected with the water tank for storing the cleaning medium, the connecting port is arranged between the cleaning nozzle 53 and the water supply pipeline, and the switch valve is arranged at each connecting port. When the cleaning nozzle 53 works, the water pump is started, the control valve is opened, the cleaning medium stored in the water tank is pumped into the water supply pipeline 52 by the water pump, under the condition that the switch valve opens the connecting port between the cleaning nozzle 53 and the water supply pipeline 52, the cleaning nozzle 53 sprays the cleaning medium to clean the spraying area.

[0052] Please refer to Figure 1The switch air suction port assembly of the present application, the rotary driving structure 57 comprises a rotary driving motor 571, the rotary driving motor 571 is provided with an output rotating shaft, the output rotating shaft is connected with a first connecting rod 572, the water supply pipeline 52 is connected with a second connecting rod 573, and the first connecting rod 572 and the second connecting rod 573 are hingedly connected with a third connecting rod 574.In the working of the rotary driving structure 57, the rotary driving motor 571 is started, the output end of the rotary driving motor 571 drives the one end of the first connecting rod 572 connected therewith to rotate, and makes the one end of the first connecting rod 572 connected with the third connecting rod 574 to swing, the first connecting rod 572 drives the third connecting rod 574 to swing, the third connecting rod 574 drives the one end of the second connecting rod 573 connected therewith to swing, the other end of the second connecting rod 573 is connected with the water supply pipeline 52, and the other end of the second connecting rod 573 drives the water supply pipeline 52 to rotate at the same time, and the cleaning nozzle 53 rotates with the water supply pipeline 52.

[0053] The switch air suction port assembly of the present application, the support assembly 56 comprises left and right supports, the water supply pipeline 52 is rotatably connected to the left and right supports, the water supply pipeline 52 is made of hard material, the rotary driving structure 57 is fixed to the left or right support, and the support assembly 56 is arranged above the air suction port 11.When the cleaning nozzle 53 needs to move from the first cleaning position to the second cleaning position or from the second cleaning position to the first cleaning position, the up-down driving structure 58 is started, the support assembly 56 is driven to slide along the guide structure, the water supply pipeline 52 slides along the guide structure with the support assembly 56, so that the cleaning nozzle 53 moves between the first cleaning position and the second cleaning position, and the corresponding spraying area is cleaned.The support assembly 56 arranged above the air suction port 11 means that the support assembly 56 does not contact the inner wall surface of the panel 1 after the support assembly 56 is slidably connected to the guide structure, and there is a gap between the support assembly 56 and the air suction port 11, so that the water supply pipeline 52 does not contact the inner wall surface of the panel 1, the liquid outlet hole of the cleaning nozzle 53 is prevented from being blocked, and the cleaning medium has a flow space when the cleaning nozzle 53 sprays the cleaning medium to the inner wall surface of the panel 1.

[0054] Please refer to Figure 4 and Figure 5 In other embodiments, the cleaning device 5 comprises a brush assembly, the brush assembly comprises a rotating brush 51 facing the shielding surface, the rotating brush 51 has an elastic brush head, the brush head elastically contacts and cleans the shielding surface.When the damper plate 4 moves to the second position on the guide rail 3, the shielding surface of the damper plate 4 faces the cleaning device 5, the cleaning device 5 is started, the rotating brush 51 rotates, the brush head elastically contacts and cleans the shielding surface, so that the shielding surface is cleaned.

[0055] Please refer to Figure 4 , Figure 5 and Figure 7In the illustrated embodiment, the brush assembly further comprises a fixed support 54 arranged in the air collecting cavity, the rotating brush 51 is arranged on the fixed support 54, and the fixed support 54 is provided with a brush rotating driving member 55 capable of driving the rotating brush 51 to rotate relative to the fixed support 54. After the damper plate 4 is moved to the second direction section 32 of the guide rail 3, the damper plate 4 is arranged obliquely, the shielding surface on the damper plate 4 and the bulge portion 42 on the shielding surface are directed towards the cleaning device 5, the cleaning device 5 is started, the brush rotating driving member 55 drives the rotating brush 51 to rotate on the fixed support 54, so that the rotating brush 51 acts on the shielding surface of the damper plate 4, and the rotating brush 51 cleans the shielding surface of the damper plate 4.

[0056] Referring to Figure 6 In some embodiments, the rotating brush 51 of the brush assembly comprises a brush rotating shaft and left and right brush hairs arranged on both sides of the brush rotating shaft, the left and right brush hairs are arranged symmetrically relative to the brush rotating shaft, the left and right brush hairs are vertically distributed when the cleaning device 5 is not started, the brush rotating driving member 55 is started and drives the rotating brush 51 to rotate around the fixed support 54 when the cleaning device 5 is started, the rotating brush 51 extrudes the wall surface of the containing cavity, and the left and right brush hairs frictionally clean the inner wall surface of the part of the faceplate 1 located in the containing cavity and the shielding surface of the damper plate 4.

[0057] Referring to Figure 6 In another embodiment, the brush assembly further comprises a brush up-down driving structure 59, a driving end of the brush up-down driving structure 59 is connected with the fixed support 54, and the brush up-down driving structure 59 is used to drive the fixed support 54 to move in the air collecting cavity. Before the damper plate 4 is moved to the second direction section 32 of the guide rail 3, the brush up-down driving structure 59 moves the fixed support 54 to below the air suction port 11, and after the damper plate 4 is moved to the second direction section 32 of the guide rail 3, the rotating brush 51 is located in the containing cavity formed by the damper plate 4 and the faceplate 1; after the damper plate 4 is moved to the first direction section of the guide rail 3 and the air suction port 11 is closed, the brush up-down driving structure 59 drives the fixed support 54 to move in the air collecting cavity to clean the inner cavity of the air collecting cavity.

[0058] Referring to Figure 7 In the illustrated embodiment, the rotating brush 51 of the brush assembly comprises a rotating shaft and scrapers uniformly arranged on the rotating shaft, the brush rotating driving member 55 is started and drives the rotating brush 51 to rotate around the fixed support 54 when the brush assembly is started, the scrapers extrude the wall surface of the containing cavity, and at least the oil stains on the shielding surface of the damper plate 4 are scraped downwards, so that the shielding surface of the damper plate 4 is cleaned completely.

[0059] Referring to Figure 4 In the illustrated embodiment, the cleaning device 5 comprises a brush assembly and a spraying assembly, and the brush assembly cooperates with the spraying assembly to clean the shielding surface of the damper plate 4 only when the inner cleaning assembly is in the damper plate cleaning state.

[0060] In some other embodiments, the cleaning device 5 comprises a brush assembly and a spraying assembly, the brush assembly has a brush up-down driving structure 59, when the damper plate 4 closes the air inlet 11, the brush up-down driving structure 59 drives the fixed support 54 to move in the air collecting cavity, at the same time, the brush rotating driving member 55 drives the rotating brush 51 to rotate and clean the wall surface of the inner cavity of the air collecting cavity. The wall surface of the inner cavity of the air collecting cavity comprises the inner wall surface of the back plate 2, the inner wall surface of the face plate 1 and the wall surface of the side of the damper plate 4 away from the face plate 1.

[0061] In some other embodiments, the cleaning device 5 comprises a brush assembly and a spraying assembly, the brush assembly has a brush up-down driving structure 59, when the damper plate 4 closes the air inlet 11, the brush up-down driving structure 59 drives the fixed support 54 to move in the air collecting cavity, at the same time, the brush rotating driving member 55 drives the rotating brush 51 to rotate and clean the wall surface of the inner cavity of the air collecting cavity. The wall surface of the inner cavity of the air collecting cavity comprises the inner wall surface of the back plate 2, the inner wall surface of the face plate 1 and the wall surface of the side of the damper plate 4 away from the face plate 1.

[0062] Please refer to Figures 2 to 5 The inner cleaning assembly of the present application also has a normal air supply state, the damper plate 4 has a wind guide opening 41, the damper plate 4 has a third position on the guide rail 3, in the third position, the wind guide opening 41 corresponds to the air inlet 11, and the air inlet 11 is opened. When the damper plate 4 is in the third position on the guide rail 3, the wind guide opening 41 of the damper plate 4 corresponds to the air inlet 11, and the damper plate 4 also needs to be close to the inner wall surface of the face plate 1, so that the wind guide opening 41 on the damper plate 4 corresponds to the air inlet 11 and the oil fume outside the face plate 1 cannot enter the gap between the damper plate 4 and the face plate 1, therefore, the third position is also on the first direction segment 31 of the guide rail 3, when the damper plate 4 slides on the first direction segment 31 of the guide rail 3, the damper plate 4 switches between the first position and the third position, the bulge portion 42 extends out of the air inlet 11 or the wind guide opening 41 corresponds to the air inlet 11; when the damper plate 4 slides to the third position, the wind guide opening 41 corresponds to the air inlet 11, the air inlet 11 is opened, and the inner cleaning assembly enters the normal air supply state, at this time, when the exhaust fan of the range hood is started, the external oil fume enters the air collecting cavity through the air inlet 11 and the wind guide opening 41. That is to say, the air inlet 11 is in an open state in the damper plate cleaning state or the normal air supply state of the inner cleaning assembly, but only in the damper plate cleaning state of the inner cleaning assembly, the cleaning device 5 cleans the shielding surface of the damper plate 4.

[0063] The present application also discloses a range hood, and the range hood of the present application adopts the above-mentioned inner cleaning assembly. Please refer to Figure 1 and Figure 4The oil fume extractor disclosed by the application further comprises an exhaust fan 7 arranged in the air collecting cavity. When the shielding surface of the damper plate 4 shields the air inlet 11, the exhaust fan 7 is closed. When the shielding surface of the damper plate 4 is away from the air inlet 11, the air inlet 11 is opened, and the exhaust fan operates. When the oil fume extractor is in operation, the inner cleaning assembly is in a normal air supply state, the damper plate 4 is in the third position on the guide rail 3, the air guide opening 41 corresponds to the air inlet 11, the air inlet 11 is opened, the exhaust fan 7 is started, and the external oil fume enters the air collecting cavity through the air inlet 11 and the air guide opening 41 under the action of the exhaust fan, and then is discharged from the air collecting cavity by the exhaust fan 7. When the oil fume extractor is in operation, if it is necessary to clean the shielding surface on the damper plate 4, the inner cleaning assembly can be switched to a damper plate cleaning state. The damper plate 4 is moved to the second section 32 of the guide rail 3 and is located at the second position under the action of the driving device 6. At this time, the damper plate 4 is located below the air inlet 11, and a containing cavity is formed between the damper plate 4 and the inner wall surface of the panel 1. The cleaning device 5 is arranged in the containing cavity, the shielding surface on the damper plate 4 faces the cleaning device 5, the cleaning device 5 is started, the cleaning nozzle 53 of the spraying assembly faces the shielding surface and sprays the cleaning medium to the shielding surface, and the rotating brush 51 is driven to rotate by the brush rotating driving member 55, so that the rotating brush 51 cleans the shielding surface of the damper plate 4. When the oil fume extractor completes the work, the exhaust fan is closed. According to the needs of the user, the inner cleaning assembly can be switched to a state of closing the air inlet or a state of cleaning the inner wall of the air collecting cavity. If the user switches the inner cleaning assembly to the state of closing the air inlet, the driving device 6 moves the damper plate 4 on the guide rail 3. When the damper plate 4 moves to the first position, the shielding surface of the damper plate 4 closes the air inlet 11, and the bulge part 42 on the shielding surface extends into the air inlet 11 and forms the appearance surface of the panel 1. At this time, the oil fume extractor is completely turned off. When the exhaust fan is closed, if the user switches the inner cleaning assembly to the state of cleaning the inner wall of the air collecting cavity, the driving device 6 drives the damper plate 4 to move on the guide rail 3. When the damper plate 4 moves to the first position, the shielding surface of the damper plate 4 closes the air inlet 11, and the bulge part 42 on the shielding surface extends into the air inlet 11 and forms the appearance surface of the panel 1. The cleaning device 5 is started, the upper and lower driving structures 58 of the spraying assembly drive the support assembly 56 to slide along the guide structure, the water supply pipeline 52 moves up and down with the support assembly 56, the rotating driving structure 57 drives the water supply pipeline 52 to rotate, the cleaning nozzle 53 rotates with the water supply pipeline 52 and sprays the cleaning medium, and after the inner wall surface of the entire air collecting cavity is cleaned, the cleaning device 5 stops operating, and the oil fume extractor is completely turned off.

[0064] In the embodiment that the brush assembly has the brush up-down driving structure 59, when the inner cleaning assembly is in the state of cleaning the inner wall of the air collecting cavity, the brush up-down driving structure 59 drives the fixed support 54 to move in the air collecting cavity, the brush rotating driving member 55 rotates the rotating brush 51, and the rotating brush 51 rotates relative to the fixed support 54, so as to assist the spraying assembly to clean the inner wall of the air collecting cavity, and the inner wall of the air collecting cavity is cleaned more thoroughly.

[0065] Please refer to Figure 4 In the illustrated embodiment, when the inner cleaning assembly is switched to the state of cleaning the inner wall of the air collecting cavity, the brush assembly is in the state of stopping running, and the spraying assembly moves in the air collecting cavity and cleans the inner wall of the air collecting cavity.

[0066] The oil fume extractor of the present application, the spraying area of the spraying assembly further comprises a third spraying area corresponding to the area where the smoke exhaust fan 7 is located. When the oil fume extractor is working, the smoke exhaust fan 7 is started, the external oil fume enters the air collecting cavity through the air inlet 11 on the panel 1 of the oil fume extractor, and then is discharged from the air collecting cavity by the smoke exhaust fan 7. The smoke exhaust fan 7 is located above the air inlet 11. After the oil fume enters the air collecting cavity, it flows to the air inlet of the smoke exhaust fan 7 under the action of the smoke exhaust fan 7. In the process of flowing to the air inlet of the smoke exhaust fan 7, part of the airflow formed by the oil fume will directly enter the shell of the smoke exhaust fan 7 through the air inlet of the smoke exhaust fan 7, and the other part will hit the back plate 2, and then flow along the back plate 2 to the air inlet of the smoke exhaust fan 7, and then enter the shell of the smoke exhaust fan 7, and finally be discharged from the air collecting cavity by the smoke exhaust fan 7. In the whole smoke exhaust process, after the oil fume enters the air collecting cavity through the air inlet 11, it flows to the smoke exhaust fan 7. Since the smoke exhaust fan 7 is located above the air inlet 11, the oil fume flows upward after entering the air collecting cavity through the air inlet 11. Therefore, during the smoke exhaust process, the mixture of oil and water formed by the oil fume in the air collecting cavity mainly adheres to the part of the inner wall surface of the back plate 2 located above the air inlet 11, the part of the inner wall surface of the panel 1 located above the air inlet 11, and the shell of the smoke exhaust fan 7. When the mixture of oil and water accumulates to a certain amount on the part of the inner wall surface of the back plate 2 located above the air inlet 11, the part of the inner wall surface of the panel 1 located above the air inlet 11, and the shell of the smoke exhaust fan, the mixture of oil and water will flow along the part of the inner wall surface of the back plate 2 located above the air inlet 11 to the part of the inner wall surface of the back plate 2 located below the air inlet 11, the part of the inner wall surface of the panel 1 located above the air inlet 11 to the part of the inner wall surface of the panel 1 located below the air inlet 11, and the shell of the smoke exhaust fan 7 downward. Therefore, the spraying area of the spraying assembly comprises a first spraying area corresponding to the inner wall surface of the panel 1 of the oil fume extractor, a second spraying area corresponding to the inner wall surface of the back plate 2, and a third spraying area corresponding to the area where the smoke exhaust fan 7 is located. When the cleaning nozzle 53 is in the second cleaning position, the cleaning nozzle 53 is located above the air inlet 11, and the cleaning nozzle 53 cleans the first spraying area, the part of the second spraying area located above the air inlet 11, and the third spraying area. When the cleaning nozzle 53 is in the first cleaning position, the cleaning nozzle 53 is located below the air inlet 11, and the cleaning nozzle 53 cleans the part of the first spraying area and the second spraying area located below the air inlet 11, so that the inner wall surface of the whole air collecting cavity and the smoke exhaust fan 7 can be cleaned.

[0067] Please refer to Figure 1 , Figure 3 and Figure 4The range hood of the present application further comprises a PM2.5 detection module 8 capable of detecting the quality of the surrounding air in real time and a display control device 9 capable of displaying the detection data thereof, the inner cleaning assembly, the exhaust fan 7 and the PM2.5 detection module 8 are electrically connected with the display control device 9, when the detection value of the PM2.5 detection module 8 reaches the set range, the display control device 9 sends the start-up instruction to the exhaust fan 7 and the inner cleaning assembly, the damper plate 4 opens the air inlet 11, and the exhaust fan 7 enters the running state; or when the detection value of the PM2.5 detection module 8 reaches the set range, the display control device 9 sends the start-up instruction to the exhaust fan 7 and the inner cleaning assembly, the inner cleaning assembly enters the damper plate cleaning state, and the exhaust fan 7 enters the running state. The range hood of the present application, when the range hood is in the shutdown state, the damper plate 4 shields the air inlet 11; after the range hood is started, the PM2.5 detection module 8 is started first, the PM2.5 detection module 8 detects the air quality of the working environment and sends the detection data to the display control device 9, the display control device 9 displays the data detected by the PM2.5 detection module 8 and determines whether the detection value of the PM2.5 detection module 8 reaches the set range, when the detection value of the PM2.5 detection module 8 reaches the set range, the display control device 9 sends the start-up instruction to the exhaust fan 7 and the inner cleaning assembly, the inner cleaning assembly enters the normal air supply state, the driving device 6 is started and drives the damper plate 4 to slide along the guide rail 3 and move to the third position, the air guide opening 41 is aligned with the air inlet 11, the air inlet 11 is opened, and the exhaust fan 7 enters the running state, under the action of the exhaust fan 7, the external oil fume enters the air collecting cavity through the air inlet 11, and then is discharged from the air collecting cavity by the exhaust fan 7, when the exhaust fan 7 works, the PM2.5 detection module 8 detects the quality of the surrounding air in real time and sends the detection data to the display control device 9, at this time, if the user needs to clean the shielding surface of the damper plate 4 by the cleaning device 5, the user switches the inner cleaning assembly to the damper plate cleaning state through the display control device 9, the driving device 6 moves the damper plate 4 to the second position, the cleaning device is started and cleans the shielding surface of the damper plate 4; when the detection value of the PM2.5 detection module 8 is lower than the minimum value of the set range, the display control device 9 sends the shutdown instruction to the exhaust fan 7 and the driving device 6, the exhaust fan 7 enters the shutdown state, the inner cleaning assembly enters the state of closing the air inlet, and the driving device 6 drives the damper plate 4 to slide along the guide rail 3, when the damper plate 4 moves to the first position on the first section 31, the bulge portion 42 extends out of the air inlet 11 and shields the air inlet 11; after the exhaust fan 7 is shut down, if the user needs to clean the air collecting cavity, the user switches the inner cleaning assembly to the air collecting cavity inner wall cleaning state through the display control device 9, the cleaning device 5 is started and cleans the air collecting cavity.

[0068] Please refer to Figure 3 and Figure 4The oil collecting hood of the present application is provided with oil leakage holes at the bottom of the air collecting cavity and an oil cup 10 for receiving the oil and dirt flowing out of the oil leakage holes, and a liquid level sensor is arranged in the oil cup 10; when the inner cleaning assembly is in the cleaning state of the inner wall of the air collecting cavity, the cleaning device 5 adjusts the spraying time according to the amount of oil and dirt collected in the oil cup 10, and the cleaning device 5 stops running after reaching the spraying time; when the inner cleaning assembly is in the cleaning state of the damper plate, the cleaning device 5 stops running after working for 1-5 minutes. After the exhaust fan 7 is turned off, if the air collecting cavity needs to be cleaned, the user switches the inner cleaning assembly to the cleaning state of the inner wall of the air collecting cavity through the display control device 9, the cleaning device 5 starts and cleans the air collecting cavity, and when the cleaning device 5 works, the mixture of the cleaning medium sprayed by the spraying assembly and the oil and water cleaned down flows along the inner wall surface of the rear plate 2, the inner wall surface of the panel 1, the damper plate 4 and the shell of the exhaust fan 7, and drips to the bottom of the air collecting cavity, and then drips downward from the oil leakage holes provided at the bottom of the air collecting cavity and is received by the oil cup 10 at the bottom of the air collecting cavity. When the inner cleaning assembly is switched to the cleaning state of the inner wall of the air collecting cavity, the cleaning range of the cleaning device 5 is relatively large, and when the liquid level sensor in the oil cup 10 does not alarm the control system, the spraying assembly will continue to work and clean the oil and dirt in the spraying area, and when the amount of oil and dirt collected in the oil cup 10 reaches the pre-warning amount of the liquid level sensor, the liquid level sensor alarms the control system, and the control system adjusts the spraying time of the spraying assembly to prevent the oil and dirt in the oil cup 10 from overflowing. When the exhaust fan 7 is started and normally runs, if the shielding surface of the damper plate 4 needs to be cleaned, the user switches the inner cleaning assembly to the cleaning state of the damper plate through the display control device 9, the spraying assembly enters the first cleaning position, and the spraying assembly cleans the shielding surface of the damper plate 4 and the inner wall surface of the panel 1 located below the air inlet 11, and the cleaning range is relatively small, and at this time the spraying assembly stops running after spraying for 1-5 minutes, so that the shielding surface of the damper plate 4 and the inner wall surface of the panel 1 located below the air inlet 11 can be cleaned completely.

[0069] The above is only a preferred embodiment of the present application, and is not intended to limit the present application, and any modification, equivalent replacement or improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An internal cleaning assembly for a range hood, comprising: The utility model relates to a kind of exhaust fan, including: Panel (1), air suction port (11) is arranged on it; Rear plate (2) is arranged corresponding with the panel (1), and the rear plate (2) is formed with wind collecting cavity between the panel (1), and guide rail (3) is arranged in the wind collecting cavity; Damper plate (4) is slidably connected to the guide rail (3), and the damper plate (4) has shielding surface that shields the air suction port (11) and forms the appearance surface of the panel (1); Cleaning device (5) is arranged in the wind collecting cavity; Wherein, inner cleaning assembly has damper plate cleaning state and wind collecting cavity inner wall cleaning state;In damper plate cleaning state, the shielding surface of the damper plate (4) is towards the cleaning device (5), the air suction port (11) is opened, and the cleaning device (5) cleans the shielding surface;In wind collecting cavity inner wall cleaning state, the shielding surface of the damper plate (4) shields the air suction port (11), and cleaning device (5) is started and cleans the side of the damper plate (4) towards the rear plate (2) and the inside of the rear plate (2).

2. The internal cleaning assembly of claim 1, wherein, It also includes driving device (6), and the driving device (6) is connected with the damper plate (4), and the damper plate (4) has first position and second position on the guide rail (3), in the first position, the shielding surface of the damper plate (4) shields the air suction port (11), and the air suction port (11) is closed, in the second position, the shielding surface of the damper plate (4) is towards the cleaning device (5), and the air suction port (11) is opened, and the driving device (6) drives the damper plate (4) to move between the first position and the second position.

3. The internal cleaning assembly of claim 2, wherein, The guide rail (3) has included angle that connects the first position and the second position, and the included angle makes the damper plate (4) away from the panel (1) and form 15 °-45 ° included angle with the inner wall surface of the panel (1) when being in the second position.

4. The internal cleaning assembly of claim 2, wherein, It also has closed air suction port state, and when the damper plate (4) moves from the second position to the first position on the guide rail (3), the inner cleaning assembly is switched from damper plate cleaning state to closed air suction port state, and at this time, cleaning device (5) is closed, and when the cleaning device (5) is opened, the inner cleaning assembly is switched from closed air suction port state to wind collecting cavity inner wall cleaning state.

5. The internal cleaning assembly of claim 1, wherein, The cleaning device (5) includes brush assembly;Or / and the cleaning device (5) includes spray assembly, and in the damper plate cleaning state, the spray assembly is operated, and the exhaust fan is operated.

6. The internal cleaning assembly of claim 1, wherein, It also has normal air supply state, and the damper plate (4) has air guide opening (41) on it, and the damper plate (4) has third position on the guide rail (3), in the third position, the air guide opening (41) corresponds with the air suction port (11), and the air suction port (11) is opened.

7. The internal cleaning assembly of claim 1, wherein, The cleaning device (5) comprises a brush assembly, which comprises a rotating brush (51) facing the shielding surface, the rotating brush (51) having an elastic brush head, which elastically contacts and cleans the shielding surface; or / and the cleaning device (5) comprises a spraying assembly, which comprises a water supply pipeline (52) and a cleaning nozzle (53) facing the shielding surface, the water supply pipeline (52) being horizontally arranged along the shielding surface, and a plurality of cleaning nozzles (53) being arranged along the water supply pipeline (52) at intervals.

8. A range hood employing the inner cleaning assembly according to any one of claims 1 to 7, characterized in that, Further comprising an exhaust fan (7) arranged in the air collecting cavity, when the shielding surface of the damper plate (4) shields the air suction port (11), the exhaust fan (7) is closed, when the shielding surface of the damper plate (4) is away from the air suction port (11), the air suction port (11) is opened, and the exhaust fan (7) is operated.

9. The hood according to claim 8, characterized in that, Further comprising a PM2.5 detection module (8) capable of detecting the air quality around in real time and a display control device (9) capable of displaying the detection data thereof, the inner cleaning assembly, the exhaust fan (7) and the PM2.5 detection module (8) are electrically connected with the display control device (9), when the detection value of the PM2.5 detection module (8) reaches the set range, the display control device (9) sends a start-up instruction to the exhaust fan (7) and the inner cleaning assembly, the damper plate (4) opens the air suction port (11), and the exhaust fan (7) enters the operating state; or when the detection value of the PM2.5 detection module (8) reaches the set range, the display control device (9) sends a start-up instruction to the exhaust fan (7) and the inner cleaning assembly, the inner cleaning assembly enters the damper plate cleaning state, and the exhaust fan (7) enters the operating state.

10. The hood according to claim 8, characterized in that, The bottom of the air collecting cavity is provided with an oil leakage hole and an oil cup (10) for receiving the oil stains flowing out of the oil leakage hole, and the oil cup (10) is provided with a liquid level sensor; when the inner cleaning assembly is in the air collecting cavity inner wall cleaning state, the cleaning device (5) adjusts the spraying time according to the amount of oil stains collected in the oil cup (10), and the cleaning device (5) stops operating after reaching the spraying time; when the inner cleaning assembly is in the damper plate cleaning state, the cleaning device (5) stops operating after working for 1-5 minutes.

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