A range hood

Abstract

The present invention discloses a range hood, comprising: a fan frame, in which a fan system is arranged; a box body, on which a first air inlet assembly and a second air inlet assembly are arranged, and the range hood also comprises a cleaning chamber provided with a cleaning device; when the range hood is in a fume absorbing state, the first air inlet assembly is in a first position, and the first air inlet assembly and the second air inlet assembly are independently connected to the fan system fluid; when the range hood is in a self-cleaning state, the first air inlet assembly is in a second position, at which time the first air inlet assembly is folded relative to the second air inlet assembly, and the first air inlet assembly and the second air inlet assembly are arranged in parallel, so as to close and block the air inlet to each other; at the same time, the second air inlet assembly is connected to the cleaning chamber fluid and is disconnected from the flow channel of the fan system, and the cleaning chamber is connected to the fan system fluid, so that the cleaning liquid generated by the cleaning device circulates among the cleaning chamber, the fan system, the first air inlet assembly, the second air inlet assembly and the cleaning chamber.

Description

Technical Field

[0001] The invention relates to an oil fume purification device, in particular to a range hood. Background Art

[0002] As an indispensable kitchen appliance in every family, the range hood sucks in oil fume from the air inlet through the high-speed rotating impeller in the volute, filters the oil fume with the impeller, and discharges the filtered oil fume from the air outlet to complete the kitchen air purification work. Reasonable air inlet setting is conducive to improving the oil fume absorption effect, reducing the escape of oil fume, and improving the air quality in the kitchen.

[0003] A top-side double-suction range hood has appeared on the market. It has air inlets designed both directly above and above the stove. The purpose of setting the air inlet on the upper side is usually to change the path of the oil smoke rising when the amount of oil smoke is large, that is, the oil smoke will shift to the side and rear, solving the problem of oil smoke escaping in front of the range hood, while sucking in a small amount of oil smoke. The other air inlet located directly above is the main air inlet of the range hood, which is used to suck in the remaining large amount of oil smoke. Such a design can significantly improve the suction effect. Although this type of range hood has two air inlets, the internal air duct is often shared. The shared air duct will cause the flow distribution of the two air inlets to be uncontrollable, and the air volume at the air inlet is unstable.

[0004] In addition, after a long period of use, a lot of oil will accumulate inside the range hood, which will affect the efficiency of oil fume extraction. For example, the mesh of the filter will be clogged, resulting in increased wind resistance, and the impeller blades of the fan will accumulate oil, resulting in reduced air volume. For this reason, existing self-cleaning range hoods are mostly cleaned at these two places.

[0005] Currently, most of the range hoods on the market cannot directly clean their inner cavities. A small number of range hoods can use steam washing, water washing, thermal oil cleaning and other methods to clean the inner cavities, but the above cleaning methods are simply to spray cleaning liquid into the inner cavity through a nozzle, which is then discharged by the fan system or flows downward to the oil cup. It is impossible to thoroughly clean the inner cavity of the range hood, or a complex cleaning device is required. Summary of the invention

[0006] The technical problem to be solved by the present invention is to provide a range hood with a simple structure to improve the cleaning effect of the inner cavity of the range hood in view of the deficiencies in the above-mentioned prior art.

[0007] The technical solution adopted by the present invention to solve the above technical problems is: a range hood, comprising:

[0008] A fan rack, wherein a fan system is arranged in the fan rack;

[0009] A box body is provided with a first air inlet assembly and a second air inlet assembly, and is characterized in that:

[0010] The range hood further comprises a cleaning chamber provided with a cleaning device;

[0011] When the range hood is in a range hood absorbing state, the first air inlet assembly is in a first position, at which the first air inlet assembly is unfolded relative to the second air inlet assembly, and the first air inlet assembly and the second air inlet assembly are independently in fluid communication with the fan system;

[0012] When the range hood is in the self-cleaning state, the first air inlet assembly is in the second position, at which time the first air inlet assembly is folded relative to the second air inlet assembly, and the first air inlet assembly and the second air inlet assembly are arranged in parallel, thereby closing and blocking the air intake from each other; at the same time, the second air inlet assembly is connected to the cleaning chamber fluid and disconnected from the flow channel of the fan system, and the cleaning chamber is connected to the fan system fluid, so that the cleaning fluid generated by the cleaning device circulates between the cleaning chamber, the fan system, the first air inlet assembly, the second air inlet assembly and the cleaning chamber.

[0013] In order to create regulation for the fluid connection between the first air inlet component and the second air inlet component, and also to make the range hood more beautiful when not in operation, a first air inlet is provided on the first air inlet component, and a second air inlet is provided on the second air inlet component. The second air inlet is provided on the front side of the second air inlet component. When the first air inlet component is in a first position, the first air inlet faces the rear side and corresponds to the second air inlet; when the first air inlet component is in a second position, the first air inlet faces downward. The fan system includes a first input end and a second input end, a first air inlet channel is formed between the first air inlet and the first input end, a second air inlet channel is formed between the second air inlet and the second input end, and the first air inlet channel and the second air inlet channel are independently arranged.

[0014] To facilitate the state switching of the cleaning chamber between oil fume suction and self-cleaning, a smoke inlet chamber is formed on the inner side of the second air inlet assembly, the smoke inlet chamber has a smoke inlet chamber outlet, the cleaning chamber has a cleaning chamber outlet, the range hood also includes a partition, when the range hood is in the oil fume suction state, the partition is in a position to open the smoke inlet chamber outlet and close the cleaning chamber outlet, when the range hood is in the self-cleaning state, the partition is in a position to close the smoke inlet chamber outlet and open the cleaning chamber outlet.

[0015] To facilitate the state switching between the cleaning chamber and the smoke inlet chamber, the cleaning chamber is formed inside the second air inlet assembly and arranged adjacent to the smoke inlet chamber, and a flap is arranged between the two chambers to block or connect the two chambers.

[0016] Preferably, in order to facilitate the circulation of the inclined medium in the inner cavity of the range hood, the cleaning device includes a steam generator and an internal circulation fan capable of circulating the cleaning steam generated by the steam generator inside the range hood, and a cleaning cavity is formed on the inner side of the second air inlet assembly, and the steam generator and the internal circulation fan are both arranged on the inner side of the cleaning cavity.

[0017] In order to store cleaning liquid, a liquid storage chamber for storing cleaning liquid is also formed on the inner side of the second air inlet assembly. The liquid storage chamber is located at the front side of the cleaning chamber, and the output end of the liquid storage chamber is connected to the input end of the steam generator.

[0018] In order to create regulation for the fluid connection between the first air inlet component and the second air inlet component, and also to make the range hood more beautiful in a non-working state, the first air inlet component includes a first smoke hood and a second smoke hood arranged at intervals on the left and right, and the first smoke hood and the second smoke hood can both move between a first position and a second position relative to the box body, the first air inlet includes a first inlet opened on the first smoke hood and a second inlet opened on the second smoke hood, the second air inlet includes a third inlet and a fourth inlet arranged at intervals on the left and right, when the first smoke hood and the second smoke hood are both located in the first position, the first inlet faces the rear side and is arranged corresponding to the third inlet, the second inlet faces the rear side and is arranged corresponding to the fourth inlet, and when the first smoke hood and the second smoke hood are both located in the second position, the first inlet faces downward and is located above the front side of the third inlet, and the second inlet faces downward and is located above the front side of the fourth inlet.

[0019] In order to achieve flow control on the left and right sides of the second air inlet assembly, a first smoke inlet chamber corresponding to the third inlet and a second smoke inlet chamber corresponding to the fourth inlet are formed on the inner side of the second air inlet assembly, and a first inner plate and a second inner plate spaced apart on the left and right sides are formed on the inner side of the second air inlet assembly, and the front, rear, left, bottom and first inner plate of the second air inlet assembly respectively constitute the front, rear, left, bottom and right panels of the first smoke inlet chamber, a first smoke inlet chamber outlet with an opening facing upward formed by the panels of the first smoke inlet chamber is formed in the second air inlet assembly, and the front, rear, right, bottom and second inner plate of the second air inlet assembly respectively constitute the front, rear, right, bottom and left panels of the second smoke inlet chamber, a second smoke inlet chamber outlet with an opening facing upward formed by the panels of the second smoke inlet chamber is formed in the second air inlet assembly; the cleaning chamber is arranged between the first smoke inlet chamber and the second smoke inlet chamber;

[0020] The range hood also includes a flow control device for changing the ventilation area of ​​the second air inlet channel to control the air intake volume, and the flow control device includes a first baffle capable of opening or closing the first smoke inlet chamber outlet, and a second baffle capable of opening or closing the second smoke inlet chamber outlet.

[0021] In order to facilitate the partition to conveniently open and close the smoke inlet chamber outlet, the first partition and the second partition both open or close the corresponding smoke inlet chamber outlet by sliding horizontally left and right.

[0022] According to one aspect of the present invention, the flow control device also includes a motion mechanism capable of driving the first baffle and the second baffle to be linked together, the first baffle is laterally slidingly arranged on the first inner plate, the second baffle is laterally slidingly arranged on the second inner plate, the first baffle and the second baffle are spaced apart from each other in the upper and lower directions, the motion mechanism includes a driving mechanism, a transmission mechanism, a first rack and a second rack, the transmission mechanism is a gear driven to rotate by the driving mechanism, the first rack is arranged on the first baffle, the second rack is arranged on the second baffle, the first rack and the second rack are respectively meshed with gears, so that the first baffle and the second baffle slide in opposite directions.

[0023] According to another aspect of the present invention, the flow control device also includes a motion mechanism capable of driving the first baffle and the second baffle to move independently, the first baffle is laterally slidingly arranged on the first inner plate, the second baffle is laterally slidingly arranged on the second inner plate, the first baffle and the second baffle are spaced apart from each other, the motion mechanism includes a driving mechanism, a transmission mechanism, a first rack and a second rack, the driving mechanism includes a first motor and a second motor, the transmission mechanism includes a first gear and a second gear, the first gear is driven to rotate by the first motor, and the second gear is driven to rotate by the second motor, the first rack is arranged on the first baffle and meshes with the first gear, the second rack is arranged on the second baffle and meshes with the second gear, so that the first baffle and the second baffle slide independently.

[0024] In order to facilitate the steam circulation in the cleaning state to clean the inner cavity of the range hood, the cleaning cavity is closed in the working state. The front side, rear side, bottom, first inner plate and second inner plate of the second air inlet assembly enclose a cleaning cavity, and the cleaning cavity has a cleaning cavity outlet opening upward. The first partition plate and the second partition plate can both slide to open or close the cleaning cavity outlet. The cleaning cavity outlet is connected to the second air inlet channel when opened. The first inner plate is provided with a first flap capable of blocking or connecting the first smoke inlet cavity with the cleaning cavity, and the second inner plate is provided with a second flap capable of blocking or connecting the second smoke inlet cavity with the cleaning cavity.

[0025] Compared with the prior art, the advantages of the present invention are: by setting the air inlet channels of different air inlet components to be independent of each other and switching the states of the air inlet channels, a circulation flow channel for cleaning media such as steam can be realized during self-cleaning, thereby facilitating thorough cleaning of the inner cavity of the range hood; by setting the air inlet channels of different air inlet components to be independent of each other and not interfering with each other, different air volumes entering the first air inlet component and the second air inlet component can be obtained through the design of the fan system, thereby realizing the requirements of different air inlet components for different air volumes, and making the air volume at the air inlet of the air inlet component more stable and controllable. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the first air inlet assembly of the range hood according to the first embodiment of the present invention when it is closed;

[0027] Figure 2 This is a schematic diagram of a range hood according to an embodiment of the present invention when the first air inlet assembly is opened;

[0028] Figure 3 is a schematic diagram of the oil smoke flow path of the range hood according to the first embodiment of the present invention;

[0029] Figure 4 An exploded view of some components of a range hood according to a first embodiment of the present invention;

[0030] Figure 5 is a cross-sectional view of the range hood of the first embodiment of the present invention in a non-cleaning mode;

[0031] Figure 6 is a cross-sectional view of the range hood of the first embodiment of the present invention in a cleaning mode;

[0032] Figure 7 A schematic diagram of a range hood from a rear perspective showing a flow path of cleaning gas of the range hood in a cleaning mode according to a first embodiment of the present invention;

[0033] Figure 8 A schematic diagram of a side view of a range hood showing a flow path of cleaning gas of the range hood in a cleaning mode according to a first embodiment of the present invention;

[0034] Fig. 9 It is a cross-sectional view of the cleaning chamber, liquid storage chamber and electrical chamber of the range hood according to the first embodiment of the present invention;

[0035] Fig.10 It is a three-dimensional schematic diagram of the cleaning chamber, liquid storage chamber and electrical chamber of the range hood according to the first embodiment of the present invention;

[0036] Fig.11 is a schematic diagram of a flow control device for a range hood according to a second embodiment of the present invention;

[0037] Fig.12 It is a schematic diagram of a flow control device, a first air outlet, a second air outlet and a housing inlet of a range hood according to a second embodiment of the present invention. DETAILED DESCRIPTION

[0038] The present invention is further described in detail below with reference to the accompanying drawings.

[0039] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention 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. Since the embodiments disclosed in the present invention can be set in different directions, these terms indicating directions are only for illustration and should not be regarded as limitations. For example, "up" and "down" are not necessarily limited to directions opposite to or consistent with the direction of gravity. In addition, the features defined as "first" and "second" may explicitly or implicitly include one or more of such features.

[0040] Embodiment 1

[0041] See also Figure 1 to Figure 3 A range hood comprises a housing 1 and a fan frame 2 arranged above the housing 1 , wherein a fan system 5 is arranged in the fan frame 2 .

[0042] The housing 1 is provided with a first air inlet assembly 3 in fluid communication with the fan system 5, and a first air inlet port 31 is provided on the first air inlet assembly 3. The range hood further comprises a second air inlet assembly 4 arranged at the rear side of the first air inlet assembly 3. The second air inlet assembly 4 is provided with a second air inlet port 41 opened toward the front side. The first air inlet assembly 3 and the second air inlet assembly 4 are preferably both hollow box-shaped.

[0043] See also Figures 1 to 8, the first air inlet assembly 3 can be in a first position, the first air inlet assembly 3 is unfolded relative to the housing 1, the first air inlet assembly 3 is arranged horizontally, the first air inlet 31 faces downward and is located above the front side of the second air inlet 41; the first air inlet assembly 3 can also be in a second position, the first air inlet assembly 3 is folded relative to the housing 1, the first air inlet assembly 3 is arranged longitudinally, the first air inlet 31 faces the rear side and is arranged corresponding to the second air inlet 41. The first air inlet assembly 3 can move between the first position and the second position. The fan system 5 is a dual-inlet fan, including a first input end 51 arranged corresponding to the first air inlet 31 and a second input end 52 arranged corresponding to the second air inlet 41. A first air inlet channel 9 is formed between the first air inlet 31 and the first input end 51, and a second air inlet channel 10 is formed between the second air inlet 41 and the second input end 52. The first air inlet channel 9 and the second air inlet channel 10 are independently arranged and do not interfere with each other. The fan system 5 can be designed to obtain different air volumes entering the first air inlet 31 and the second air inlet 41, thereby meeting the requirements of different air inlet components for different air volumes, making the air volume at the air inlet components more stable and controllable. In this embodiment, the axis of the fan system 5 extends forward and backward, and the first input end 51 is located in front of the second input end 52. The oil fume flow path can be seen in Figure 3 Indicated by the arrow.

[0044] The first air inlet assembly 3 includes a first smoke hood 32 and a second smoke hood 33 arranged at intervals on the left and right. The first smoke hood 32 and the second smoke hood 33 can both move between a first position and a second position relative to the housing 1. The first smoke hood and the second smoke hood are driven to move by an independent driving device 8. Each air inlet group may include one air inlet or at least two air inlets. In this embodiment, the first air inlet 31 includes a first inlet 311 opened on the first smoke hood 32 and a second inlet 312 opened on the second smoke hood 33. A first air outlet 321 is provided on the first smoke hood 32, a second air outlet 331 is provided on the second smoke hood 33, and a housing inlet 11 is provided on the housing 1 in fluid communication with the first air outlet 321 and the second air outlet 331. The second air inlet 41 includes a third inlet 411 and a fourth inlet 412 arranged at intervals on the left and right. Filters may be provided at the first inlet 311, the second inlet 312, the third inlet 411 and the fourth inlet 412.

[0045] When the first smoke hood 32 and the second smoke hood 33 are both in the second position, the first inlet 311 faces the rear side and engages with the third inlet 411, and the first inlet 311 and the third inlet 411 are closed at the same time, and the second inlet 312 faces the rear side and engages with the fourth inlet 412, and the second inlet 312 and the fourth inlet 412 are closed at the same time. The closing form of each air inlet can not only create conditions for the fluid connection between the first air inlet component 3 and the second air inlet component 4, but also prevent the range hood from backflowing and odor when not in operation, and at the same time make it more beautiful. When the first smoke hood 32 and the second smoke hood 33 are both in the first position, the first inlet 311 faces downward and is located above the front side of the third inlet, and the second inlet 312 faces downward and is located above the front side of the fourth inlet 412.

[0046] See also Figure 11-12 The range hood also includes a flow control device for changing the ventilation area of ​​the second air inlet channel 10 to control the air intake amount. A first smoke inlet chamber 42 corresponding to the third inlet 411 and a second smoke inlet chamber 43 corresponding to the fourth inlet 412 are formed on the inner side of the second air inlet assembly 4. A first inner plate 44 and a second inner plate 45 spaced apart on the left and right are formed on the inner side of the second air inlet assembly 4. The front side, rear side, left side, bottom and first inner plate 44 of the second air inlet assembly 4 respectively constitute the front panel, rear panel, left panel, bottom panel and right panel of the first smoke inlet chamber 42, and a first smoke inlet chamber outlet 46 with an upward opening formed by the panels of the first smoke inlet chamber 42 is formed in the second air inlet assembly 4. The front side, rear side, right side, bottom and second inner plate 45 of the second air inlet assembly 4 respectively constitute the front panel, rear panel, right panel, bottom panel and left panel of the second smoke inlet chamber 43. A second smoke inlet chamber outlet 47 with an upward opening formed by the panels of the second smoke inlet chamber 43 is formed in the second air inlet assembly 4. The flow control device includes a first baffle 61 capable of opening or closing the first smoke inlet chamber outlet 46, and a second baffle 62 capable of opening or closing the second smoke inlet chamber outlet 47.

[0047] The first partition 61 and the second partition 62 both open or close the corresponding smoke inlet chamber outlet by sliding horizontally from left to right, thereby realizing the flow control on the left and right sides of the range hood. The flow control device also includes a motion mechanism capable of driving the first partition 61 and the second partition 62 to slide. The first partition 61 is arranged on the first inner plate 44 for horizontal sliding, and the second partition 62 is arranged on the second inner plate 45 for horizontal sliding. The first partition 61 and the second partition 62 are arranged at intervals up and down. The motion mechanism is arranged between the first partition 61 and the second partition 62, and the motion mechanism includes a driving mechanism 63, a transmission mechanism 64, a first rack 65 and a second rack 66. The transmission mechanism 64 is a gear in this embodiment, which is driven to rotate by the driving mechanism 63, and its axis of rotation extends in the front-back direction. The driving mechanism 63 is preferably a motor. The first rack 65 is arranged on the first partition 61, and the second rack 66 is arranged on the second partition 62. The first rack 65 and the second rack 66 are meshed with the transmission mechanism 64.

[0048] In this embodiment, the first partition 61 and the second partition 62 are linked, the driving mechanism 63 only needs one motor, the transmission mechanism 64 only needs one gear, and the transmission mechanism 64 is engaged between the first rack 65 and the second rack 66, so that the first partition 61 and the second partition 62 can slide synchronously in opposite directions.

[0049] Alternatively, the driving mechanism 63, the transmission mechanism 64, the first rack 65 and the second rack 66 may also be implemented by other existing technologies, such as two sets of crank slider structures sharing the same crank.

[0050] When the two burners of the two stoves are cooking at the same time, the first smoke inlet chamber 42 and the second smoke inlet chamber 43 are both opened. At this time, the air inlets on the left and right sides of the range hood are all sucked in at the same time to ensure that the smoke does not escape.

[0051] When only one of the burners of the stove is used for cooking, only the smoke inlet cavity on the corresponding side is opened, and the other side is not opened.

[0052] Assuming that the left side of the stove is used for stir-frying and the right side is used for steaming, then for the range hood, the amount of oil smoke on the left side is greater than that on the right side, and the air volume on the right side needs to be appropriately allocated to the left side. At this time, the flow control device can be used to rotate the second gear 642 to cooperate with the second rack 66 to translate the second partition 62 out of the cleaning chamber 48 until the second smoke inlet chamber outlet 47 is closed. At this time, the only air inlet on the right side of the range hood is the second inlet 312, while the left side of the range hood still has two air inlets, the first inlet 311 and the third inlet 411. According to the principle of fluid continuity, Q=V*S, where Q is the air volume, V is the flow velocity, and S is the cross-sectional area. The total air volume is Q 总 No change, S 右 decreases, then Q 右 decreases, while Q 总 =Q左 +Q 右 , that is, Q 左 The air volume of the first inlet 311 and the third inlet 411 increases, and the smoke extraction effect on the left side of the range hood is enhanced. The opposite is true for stir-frying on the right side.

[0053] See also Figures 5 to 10 The range hood further includes a cleaning device for cleaning the interior. The cleaning device includes a steam generator 71 and an internal circulation fan 72 capable of circulating the clean steam generated by the steam generator 71 inside the range hood. A cleaning chamber 48 is formed inside the second air inlet assembly 4. The cleaning chamber 48 is arranged between the first smoke inlet chamber 42 and the second smoke inlet chamber 43. The steam generator 71 and the internal circulation fan 72 are both arranged inside the cleaning chamber 48. The front side, rear side, bottom side of the second air inlet assembly 4, and the first inner plate 44 and the second inner plate 45 respectively constitute the front panel, rear panel, bottom panel, left panel, and right panel of the cleaning chamber 48. A cleaning chamber outlet 49 with an upward opening formed by the panels of the cleaning chamber 48 is formed in the second air inlet assembly 4. The first partition plate 61 and the second partition plate 62 can open or close the cleaning chamber outlet 49 by sliding.

[0054] The first inner plate 44 is provided with a first flap 441 which can be turned over to block or connect the first smoke inlet chamber 42 with the cleaning chamber 48, and the second inner plate 45 is provided with a second flap 451 which can be turned over to block or connect the second smoke inlet chamber 43 with the cleaning chamber 48. The first flap 441 and the second flap 451 can be driven to turn over by an independently provided driving device.

[0055] A liquid storage chamber 410 and an electrical chamber 411 are also provided on the inner side of the second air inlet assembly 4. The liquid storage chamber 410 can be used to store the cleaning liquid or water required by the steam generator 71, and the liquid storage chamber 410 is located at the front side of the cleaning chamber 48. The cleaning device can also be provided with a heating device for heating the cleaning liquid or water. The electrical chamber 411 is located at the front side of the cleaning chamber 48, and the drive mechanism 63 is arranged in the electrical chamber 411, and the output shaft of the drive mechanism 63 passes through the plate body between the electrical chamber 411 and the cleaning chamber 48 and is connected to the rotation center of the transmission mechanism 64. The drive device for driving the first flap 441 and the second flap 451 to flip can also be arranged in the electrical chamber 411.

[0056] In this embodiment, the cleaning device is applied to a range hood in which the second air inlet component 4 has inlets on left and right sides. Alternatively, the cleaning device can also be used in a range hood in which the second air inlet component 4 has only one inlet, by reducing the related components of the smoke inlet chamber on one side.

[0057] In non-self-cleaning state, see Figure 5The cleaning chamber outlet 49 of the cleaning chamber 48 is closed by the first partition 61 and the second partition 62, so that the internal circulation fan 72, the steam generator 71 and the heating device (not shown in the figure) located in the cleaning chamber 48 are in a closed and isolated state, which can effectively isolate the pollution of oil smoke and extend the life of the cleaning device.

[0058] When the self-cleaning function is turned on, see Figure 6 First, move the first smoke hood 32 and the second smoke hood 33 to the second position. Then, the gear rack mechanism is turned on. The transmission mechanism 64 drives the first rack 65 and the second rack 66 to slide, and the first partition 61 and the second partition 62 are moved out of the cleaning chamber 48 to open the cleaning chamber outlet 49. At this time, the first partition 61 moves toward the first smoke inlet chamber 42 and closes the first smoke inlet chamber outlet 46. The second partition 62 moves toward the second smoke inlet chamber 43 and closes the second smoke inlet chamber outlet 47. At the same time, the first flap 441 on the first inner plate 44 and the second flap 451 on the second inner plate 45 are turned toward the cleaning chamber 48, so that the first smoke inlet chamber 42 and the second smoke inlet chamber 43 are both in fluid communication with the cleaning chamber 48, and the cleaning chamber 48 is in fluid communication with the fan system 5. Next, the nozzle of the steam generator 71 sprays out a cleaning liquid mixed gas (or high-temperature water vapor), and the heating device (not shown in the figure) starts heating to further heat the mixed gas. At the same time, the internal circulation fan 72 is started, see Figure 7-Figure 8 , under the action of the internal circulation fan 72, the high-temperature clean mixed gas passes through the following in sequence: the cleaning chamber 48--the second air inlet channel 10--the fan system 5--the first air inlet channel 9--the inside of the first smoke collecting hood 32 and the inside of the second smoke collecting hood 33--the first inlet 311 and the second inlet 312 (the filter screens at the first inlet 311 and the second inlet 312)--the third inlet 411 and the fourth inlet 412 (the filter screens at the third inlet 411 and the fourth inlet 412)--the first smoke inlet chamber 42 and the second smoke inlet chamber 43--the cleaning chamber 48, thereby realizing the internal circulation cleaning. When the high-temperature clean mixed gas returns to the cleaning chamber 48, it is supplemented with heating and the cleaning liquid concentration (or high-temperature steam concentration) is supplemented before entering the next round of cleaning cycle. The gas flow path can be seen in FIG. Figure 8 Such a cycle of cleaning can clean all parts of the air duct cavity, and reuse the clean mixed gas, reducing the amount of cleaning liquid and water.

[0059] Embodiment 2

[0060] See also Fig.11 and Fig.12In this embodiment, the difference from the above-mentioned embodiment 1 is that the first baffle 61 and the second baffle 62 move independently, the driving mechanism 63 may include a first motor 631 and a second motor 632, and the transmission mechanism 64 may include a first gear 641 and a second gear 642. The first motor 631 is used to drive the first gear 641 to rotate, and the second motor 632 is used to drive the second gear 642 to rotate, and the axes of rotation of the two gears extend in the front-to-back direction. The first rack 65 is provided on the first baffle 61 and meshes with the first gear 641, and the second rack 66 is provided on the second baffle 62 and meshes with the second gear 642.

[0061] Alternatively, the drive mechanism 63, the transmission mechanism 64, the first rack 65 and the second rack 66 may also be realized by other two sets of linear drive modules, where the linear drive module is an existing structure, such as a combination of an electric push rod, a motor screw nut, etc.

[0062] The "fluid connection" referred to in the present invention refers to the spatial position relationship between two parts or parts (hereinafter collectively referred to as the first part and the second part respectively), that is, the fluid (gas, liquid or a mixture of the two) can flow from the first part along the flow path or / and be transported to the second part. The first part and the second part can be directly connected, or the first part and the second part can be indirectly connected through at least one third party. The third party can be a fluid channel such as a pipe, channel, duct, guide member, hole, groove, etc., or it can be a chamber allowing fluid to flow through, or a combination of the above.

Claims

1. A range hood, comprising: A fan frame (2), wherein a fan system (5) is arranged in the fan frame (2); A box body (1), wherein a first air inlet assembly (3) and a second air inlet assembly (4) are arranged on the box body (1), characterized in that: The range hood further comprises a cleaning chamber (48) provided with a cleaning device; When the range hood is in a range hood absorbing state, the first air inlet assembly (3) is in a first position, at which time the first air inlet assembly (3) is unfolded relative to the second air inlet assembly (4), and the first air inlet assembly (3) and the second air inlet assembly (4) are independently in fluid communication with the fan system (5); When the range hood is in the self-cleaning state, the first air inlet assembly (3) is in the second position, at which time the first air inlet assembly (3) is folded relative to the second air inlet assembly (4), and the first air inlet assembly (3) and the second air inlet assembly (4) are arranged side by side, thereby closing and blocking the air inlet from each other; at the same time, the second air inlet assembly (4) is in fluid communication with the cleaning chamber (48) and is disconnected from the flow channel of the fan system (5); the cleaning chamber (48) is in fluid communication with the fan system (5), so that the cleaning liquid generated by the cleaning device circulates between the cleaning chamber (48), the fan system (5), the first air inlet assembly (3), the second air inlet assembly (4) and the cleaning chamber (48); The first air inlet component (3) is provided with a first air inlet (31), and the second air inlet component (4) is provided with a second air inlet (41), the second air inlet (41) is provided on the front side of the second air inlet component (4), when the first air inlet component (3) is in the second position, the first air inlet (31) faces the rear side and corresponds to the second air inlet (41); when the first air inlet component (3) is in the first position, the first air inlet (31) faces downward; the fan system (5) comprises a first input end (51) and a second input end (52), a first air inlet channel (9) is formed between the first air inlet (31) and the first input end (51), a second air inlet channel (10) is formed between the second air inlet (41) and the second input end (52), and the first air inlet channel (9) and the second air inlet channel (10) are independently arranged; The first air inlet assembly (3) comprises a first smoke collecting hood (32) and a second smoke collecting hood (33) which are spaced apart from each other on the left and right sides. The first smoke collecting hood (32) and the second smoke collecting hood (33) can both move between a first position and a second position relative to the housing (1). The first air inlet (31) comprises a first inlet (311) provided on the first smoke collecting hood (32) and a second inlet (312) provided on the second smoke collecting hood (33). The second air inlet (41) comprises a third inlet (411) and a fourth inlet (412) which are spaced apart from each other on the left and right sides. 2), when the first smoke collecting hood (32) and the second smoke collecting hood (33) are both located at the first position, the first inlet (311) faces the rear side and is arranged corresponding to the third inlet (411), and the second inlet (312) faces the rear side and is arranged corresponding to the fourth inlet (412); when the first smoke collecting hood (32) and the second smoke collecting hood (33) are both located at the second position, the first inlet (311) faces downward and is located above the front side of the third inlet, and the second inlet (312) faces downward and is located above the front side of the fourth inlet (412); The inner side of the second air inlet assembly (4) is formed with a first smoke inlet chamber (42) corresponding to the third inlet (411) and a second smoke inlet chamber (43) corresponding to the fourth inlet (412); the inner side of the second air inlet assembly (4) is formed with a first inner plate (44) and a second inner plate (45) spaced apart from each other on the left and right; the front side, rear side, left side, bottom and the first inner plate (44) of the second air inlet assembly (4) respectively constitute the front panel, rear panel, left panel, bottom panel and right panel of the first smoke inlet chamber (42); the inner side of the second air inlet assembly (4) is formed with a first smoke inlet chamber (42) corresponding to the third inlet (411) and a second smoke inlet chamber (43) corresponding to the fourth inlet (412); A first smoke inlet chamber outlet (46) is formed and opened upwards and is surrounded by the enclosures of the first smoke inlet chamber (42); the front side, rear side, right side, bottom and second inner plate (45) of the second air inlet assembly (4) respectively constitute the front enclosure, rear enclosure, right enclosure, bottom enclosure and left enclosure of the second smoke inlet chamber (43); a second smoke inlet chamber outlet (47) is formed and opened upwards and is surrounded by the enclosures of the second smoke inlet chamber (43); the cleaning chamber (48) is arranged between the first smoke inlet chamber (42) and the second smoke inlet chamber (43); The range hood further comprises a flow control device for changing the ventilation area of ​​the second air inlet channel (10) so as to control the air intake volume, wherein the flow control device comprises a first baffle (61) capable of opening or closing the first smoke inlet chamber outlet (46), and a second baffle (62) capable of opening or closing the second smoke inlet chamber outlet (47).

2. The range hood according to claim 1, characterized in that: A smoke inlet chamber is formed on the inner side of the second air inlet assembly (4), the smoke inlet chamber having a smoke inlet chamber outlet, the cleaning chamber (48) having a cleaning chamber outlet (49), the range hood further comprising a partition, when the range hood is in a smoke suction state, the partition is in a position to open the smoke inlet chamber outlet and close the cleaning chamber outlet (49), and when the range hood is in a self-cleaning state, the partition is in a position to close the smoke inlet chamber outlet and open the cleaning chamber outlet (49).

3. The range hood according to claim 2, characterized in that: The cleaning chamber (48) is formed inside the second air inlet assembly (4) and is arranged adjacent to the smoke inlet chamber, and a flap is arranged between the two chambers to block or connect the two chambers.

4. The range hood according to claim 1, characterized in that: The cleaning device comprises a steam generator (71) and an internal circulation fan (72) capable of circulating the cleaning steam generated by the steam generator (71) inside the range hood, a cleaning chamber (48) is formed on the inner side of the second air inlet assembly (4), and the steam generator (71) and the internal circulation fan (72) are both arranged on the inner side of the cleaning chamber (48).

5. The range hood according to claim 4, characterized in that: A liquid storage chamber (410) for storing cleaning liquid is also formed on the inner side of the second air inlet assembly (4); the liquid storage chamber (410) is located at the front side of the cleaning chamber (48); and the output end of the liquid storage chamber (410) is connected to the input end of the steam generator (71).

6. The range hood according to claim 1, characterized in that: The first partition plate (61) and the second partition plate (62) both open or close the corresponding smoke inlet cavity outlet by sliding horizontally left and right.

7. The range hood according to claim 6, characterized in that: The flow control device also includes a motion mechanism capable of driving the first baffle (61) and the second baffle (62) to be linked, the first baffle (61) is arranged to slide laterally on the first inner plate (44), the second baffle (62) is arranged to slide laterally on the second inner plate (45), the first baffle (61) and the second baffle (62) are arranged to be spaced apart from each other in the upper and lower directions, the motion mechanism includes a driving mechanism (63), a transmission mechanism (64), a first rack (65) and a second rack (66), the transmission mechanism (64) is a gear driven to rotate by the driving mechanism (63), the first rack (65) is arranged on the first baffle (61), the second rack (66) is arranged on the second baffle (62), the first rack (65) and the second rack (66) are respectively meshed with the gears, so that the first baffle (61) and the second baffle (62) slide in opposite directions.

8. The range hood according to claim 6, characterized in that: The flow control device further comprises a motion mechanism capable of driving the first baffle (61) and the second baffle (62) to move independently, wherein the first baffle (61) is arranged to slide transversely on the first inner plate (44), and the second baffle (62) is arranged to slide transversely on the second inner plate (45), and the first baffle (61) and the second baffle (62) are arranged to be spaced apart from each other in the upper and lower directions, and the motion mechanism comprises a driving mechanism (63), a transmission mechanism (64), a first rack (65) and a second rack (66), and the driving mechanism (63) comprises a first motor (631) and a second The transmission mechanism (64) comprises a first gear (641) and a second gear (642), wherein the first gear (641) is driven to rotate by the first motor (631), and the second gear (642) is driven to rotate by the second motor (632), the first rack (65) is arranged on the first partition (61) and meshes with the first gear (641), and the second rack (66) is arranged on the second partition (62) and meshes with the second gear (642), so that the first partition (61) and the second partition (62) slide independently.

9. The range hood according to claim 1, characterized in that: The front side, rear side, bottom, first inner plate (44) and second inner plate (45) of the second air inlet assembly (4) together form a clean chamber (48); the clean chamber (48) has a clean chamber outlet (49) opening upward; the first partition plate (61) and the second partition plate (62) can both slide to open or close the clean chamber outlet (49); the clean chamber outlet (49) is connected to the second air inlet channel (10) when opened; the first inner plate (44) is provided with a first flap (441) capable of blocking or connecting the first smoke inlet chamber (42) and the clean chamber (48); the second inner plate (45) is provided with a second flap (451) capable of blocking or connecting the second smoke inlet chamber (43) and the clean chamber (48).

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