Movable nested range hood

Abstract

The present application relates to a kind of active nested range hood, comprising: top box;And bottom box, it is connected below top box and is used for smoke inlet;Bottom box and top box connection forms vent site, so that bottom box and top box are in fluid communication;Bottom box includes movable box and fixed box, fixed box is at least partially embedded in movable box, the top of movable box forms movable box outlet for smoke to top box outlet;Movable box can move relative to fixed box, when range hood is in open state, the top of movable box is below vent site, movable box outlet is at least partially located before fixed box, the movable box outlet of movable box top and vent site form the passage for oil fume to pass through;While reducing the space occupied is small and improving the amount of smoke and oil fume suction net rate, range hood can also be in open state, the air inlet on the bottom box can gradually expand pressure when mainly airflow.

Description

TECHNICAL FIELD

[0001] The present application relates to an oil fume purification device, in particular to an active nested range hood. BACKGROUND

[0002] The range hood is a kitchen appliance for purifying the kitchen environment, which can quickly remove the waste of the stove combustion and the oil fume generated during the cooking process to the outside of the room, reduce pollution, purify the air, etc.

[0003] At present, in order to expand the smoke range and improve the oil fume suction effect, the air inlet is expanded, and the common scheme is to make a nested box body, and the moving box body is pushed or rotated out, so as to increase the thickness of the box body, expand the air inlet channel, and make the negative pressure area closer to the cooking area.

[0004] For example, the range hood disclosed in the Chinese patent with the application number 202221530291.1 includes a machine body and a smoke baffle, the machine body has a fan cavity accommodating a fan, and a front side panel having a smoke inlet, the smoke inlet is in fluid communication with the fan cavity; the smoke baffle is rotatably arranged at the smoke inlet, so as to open or close the smoke inlet. The range hood in the closed state has a box body thickness of less than 100mm, and the overall design pursues thinness. However, when opened, the performance needs to be improved through the design of gradually increasing the cross section of the air duct. The maximum air volume requirement of the current market for the range hood has reached 29 cubic meters / minute or even more than 30 cubic meters / minute, but due to the excessively thin overall design, it is difficult to achieve a wind volume of more than 27 cubic meters / minute when the box body is fixed.

[0005] For example, the range hood disclosed in the Chinese patent with the application number 202322060839.1 includes a smoke collecting hood, a smoke collecting hood is arranged in the smoke collecting hood, and the smoke collecting hood is rotatably connected with the bottom of the smoke collecting hood. The side of the smoke collecting hood is provided with a smoke baffle, the smoke collecting hood is provided with a driving assembly, the driving assembly is connected with the smoke baffle, and the smoke baffle is connected with the smoke collecting hood through a linkage member; the driving assembly can drive the smoke baffle to open and close, and the smoke baffle can drive the smoke collecting hood to rotate to the place to be sucked or retract into the smoke collecting hood through the linkage member.

[0006] However, the performance of this range hood depends on the section between the fan shell and the smoke collecting hood, and only the smoke collecting hood is partially thinned, which cannot truly face the bottleneck of thinner design.

[0007] In addition, there is an extractor hood disclosed in the Chinese patent application No. 202122997388.5 of the applicant, comprising an air inlet assembly and a fan frame, the air inlet assembly and the fan frame are in fluid communication, an opening is formed at the connection between the bottom of the fan frame and the air inlet assembly, the air inlet assembly comprises a first panel and a second panel, the first panel comprises an air inlet and a baffle, the first panel and the second panel form a hollow box shape, an air inlet channel is formed in the box, the first panel can move forward and backward relative to the second panel to change the thickness of the air inlet channel, and the baffle moves close to the bottom of the fan frame to change the area of the opening in communication with the air inlet assembly. This extractor hood can expand the connection between the air inlet assembly and the fan frame when starting, so that the air inlet assembly can be thinner when the machine is off, the air inlet channel is expanded and the negative pressure is expanded outward when the machine is on. However, since the relative movement between the panels of the air inlet assembly is translation, when the extractor hood is working, the oil fume needs to turn right at the transition position of the air inlet assembly and the fan frame, which forms vortex and causes certain flow loss.

[0008] The transition position of the bottom box and the top box of the extractor hood usually causes the sudden expansion of the flow channel. When the oil fume flows from the smoke inlet of the bottom box to the sudden expansion area, the flow rate will instantaneously decrease, and the kinetic energy of the airflow is not enough to support the spread in the entire sudden expansion area, so that the flow rate difference is formed at the center and the edge. The center airflow still maintains a certain speed forward due to inertia, and the edge airflow is stagnant due to friction with the wall surface and depletion of kinetic energy. The speed difference causes the airflow to rotate and form vortex.

[0009] In addition, in the narrow air duct, the high-speed airflow forms a low dynamic pressure and a relatively stable static pressure. After entering the wide air duct, the flow rate suddenly decreases, causing the dynamic pressure to be converted into static pressure, the static pressure in the air duct increases, and a local pressure difference is formed, in which the pressure at the rear end is higher than that at the front end. This pressure difference hinders the flow of the airflow near the wall surface, causing the airflow (boundary layer) originally close to the wall surface to separate from the wall surface and form a low-pressure backflow area, and the airflow reversely rotates to generate obvious separation vortex.

[0010] The above vortex causes the exhaust efficiency to decrease, the noise to increase, and the oil deposition to increase.

[0011] Therefore, further improvement is needed. SUMMARY

[0012] The technical problem to be solved by the present application is to provide an active nested extractor hood which has good air performance under the premise of thin machine.

[0013] The technical scheme adopted by the present application to solve the above technical problem is as follows: an active nested extractor hood, comprising:

[0014] a top box; and

[0015] a bottom box connected below the top box for smoke intake;

[0016] a ventilation part is formed at the connection between the bottom box and the top box, so that the bottom box and the top box are in fluid communication; the bottom box comprises a movable box and a fixed box, the fixed box is at least partially embedded in the movable box, and a top of the movable box is provided with a movable box outlet for smoke outlet to the top box;

[0017] the movable box can move relative to the fixed box, when the movable nested range hood is in an open state, the top of the movable box is below the ventilation part, the movable box outlet is at least partially in front of the fixed box, and the movable box outlet on the top of the movable box and the ventilation part form a channel for oil fume to pass through, so that oil fume is discharged to the top box through the movable box outlet.

[0018] by at least partially embedding the fixed box in the movable box, when the movable nested range hood is in a closed state, the movable box shares part of the space with the fixed box, the appearance is neat, the occupied space is small, and cleaning is convenient, which does not affect the installation space of the kitchen and does not damage the decoration effect of the kitchen; when the movable nested range hood is in an open state, the movable box is moved to be at least partially in front of the fixed box, and the oil fume generated and rising outside the cooking bench is used to achieve the effect of gathering smoke, so as to further enhance the suction of oil fume, prevent the outflow of oil fume, improve the smoke gathering amount and oil fume suction rate of the movable nested range hood, and thus positively affect the improvement of air quality in the kitchen and the reduction of the influence on human health.

[0019] In addition, when the movable nested range hood is in an open state, the movable box outlet is at least partially in front of the fixed box, a flow channel for separated flow is formed in the front side of the fixed box, and when the oil fume flow flows along the bottom box to the diffuser area in the top box, it needs to pass through the flow channel formed by the movement of the movable box first, the flow channel is used for the control of separated flow, the total flow channel depth of the bottom box is increased forward, and thus the main flow of the air inlet on the bottom box can be gradually diffused.

[0020] Further, there is a gap between the top of the movable box and the ventilation part in the height direction of the movable nested range hood, the gap is at least partially in front of the fixed box, the movable box outlet on the top of the movable box, the gap and the ventilation part form a channel for oil fume to pass through, and the flow channel formed at the connection between the fixed box and the top box is directly in fluid communication with the gap.

[0021] There is a gap in the height direction between the bottom box and the top box, so that the oil fume flow needs to pass through the transition flow passage formed by the increased gap before reaching the diffuser area in the top box, and the transition flow passage is used for separation flow control. When the gap is located in the front side of the fixed box, the flow passage of the bottom box is increased in depth by the fixed box at the connection with the top box, so that the main flow of the air inlet on the bottom box can be gradually diffused and diffused.

[0022] The specific process is as follows:

[0023] The high-speed airflow flows out of the movable box outlet at the top of the movable box and flows into the top box. The edge of the movable box outlet is located in the stage where the depth of the flow passage changes from small to large. When the airflow passes through the movable box outlet position, the airflow will separate at the edge of the movable box outlet, forming a main flow that continues to flow upward along the original path and a separated flow (a small local area circulation flow, i.e. separation flow). If the separation flow directly leads to the top box, the vortex of the separation flow will form a Karman vortex street like a cylindrical disturbance, causing the local or even global flow passage in the top box to be blocked. Especially when the airflow enters the top box, there will be a significant diffuser process. During this diffuser process, the subsequent development of the vortex will be more serious. Therefore, the transition flow passage formed by the gap is needed to actively control the separation flow at the movable box outlet.

[0024] Firstly, the separation flow formed at the movable box outlet is affected by the increase of the flow passage. The local separation flow will be accumulated to the front side of the transition flow passage. The flow direction of the separation flow and the main flow is consistent in the transition flow passage, so that the main flow directly adheres to one side of the separation flow and rushes into the top box. At the same time, since the flow passage at the connection between the fixed box and the top box is directly in fluid communication with the gap, the transition flow passage is enlarged relative to the flow passage of the bottom box. When the airflow flows from the narrow flow passage of the bottom box to the wide flow passage of the top box, the cross-sectional area of the flow passage increases. According to Bernoulli's principle, the flow velocity will decrease, and the dynamic pressure will be converted into static pressure, resulting in an increase in static pressure. Thus, the static pressure increases along the direction of airflow flow, forming an adverse pressure gradient. The separation flow can provide a virtual, aerodynamic, and streamlined flow guide surface for the main flow. The main flow diffuses along the flow guide surface to the top box, greatly alleviating the problem of adverse pressure gradient.

[0025] Secondly, the separation flow circulates in order in the transition flow passage, forming a backflow area. Therefore, the airflow speed in the backflow area is relatively low, that is, the backflow area acts as a buffer area, effectively separating and managing the main flow and the separation flow in space. Moreover, the separation flow is not easy to separate from the transition flow passage because the flow rate decreases and the negative pressure increases when the airflow enters the top box to form an expansion flow. The negative pressure of the main flow is higher than that of the separation flow, so that the separation flow does not easily separate from the transition flow passage, and the main flow is guided to complete efficient diffusion. Finally, a relatively stable flow field is realized in the wall surface of the top box, which is not disturbed and blocked by the separated flow.

[0026] Further, the ventilation part includes a fixed cabinet ventilation opening and a movable cabinet ventilation opening located in front of the fixed cabinet ventilation opening, the two ventilation openings are in communication with each other, in the horizontal plane projection, the fixed cabinet ventilation opening corresponds to the fixed cabinet; when the movable nested range hood is in the closed state, the movable cabinet ventilation opening is closed; when the movable nested range hood is in the open state, the movable cabinet ventilation opening is opened, the movable cabinet is located below the movable cabinet ventilation opening, and the gap exists between the top of the movable cabinet and the movable cabinet ventilation opening. Thus, the opening and closing of the movable cabinet ventilation opening cooperate with the movement of the movable cabinet, so that the whole machine is thin when closed and the closed ventilation part does not cause oil smoke backflow, and when opened, the negative pressure is expanded and the ventilation part is expanded, which can improve the oil smoke suction effect.

[0027] Further, since the gap is an open space, the flow of oil smoke to this place may cause pressure relief, therefore, the movable nested range hood further includes a flap, when the movable nested range hood is in the closed state, the flap closes the movable cabinet ventilation opening, when the movable nested range hood is in the open state, the flap opens the movable cabinet ventilation opening, and the flap at least blocks the outer peripheral edge of the gap. Thus, after the movable cabinet is opened to the position, the outer periphery of the gap is blocked by the flap, so that the flap and the movable cabinet, the fixed cabinet and the top cabinet form a relatively closed space, the edges of the flap can form an impact micro vortex caused by the instantaneous change of the cross-sectional shape, and the existence of the closed space makes the violent impact part not occur in the expansion pressure severe section of the top cabinet, and the micro vortex left in the closed space gradually diffuses to the expansion pressure wall surface in the subsequent top cabinet along the main airflow, the micro vortex hinders the generation of large vortex flow with severe expansion pressure, and further hinders the growth of separated flow (similar to the small vortex flow generated by the concave-convex surface of golf, which destroys the large vortex flow at the tail, makes the golf run loss smaller, and the fairway farther), increases the stability of the separated flow to reduce the possibility of its separation and shedding into the main flow, further increases the protection on the basis of the transition flow passage, thereby avoiding sudden kinetic energy loss, and making the dynamic pressure to static pressure conversion more gentle, avoiding the occurrence of severe pressure difference, relieving pressure sudden change, and inhibiting the separation of boundary layer at different positions.

[0028] Further, the top of the movable cabinet is formed with a movable cabinet outlet corresponding to the position of the top cabinet, and the outer peripheral edge of the gap includes a first part, which is a space between the front side edge of the movable cabinet outlet and the top cabinet;

[0029] The opening and closing plate comprises a first plate body, when the movable nested range hood is in a closed state, the first plate body is closed at the vent of the movable box, when the movable nested range hood is in an open state, the first plate body opens the vent of the movable box, the opening and closing plate blocks the first part through the first plate body;

[0030] Alternatively, the opening and closing plate comprises a first plate body and a second plate body, the second plate body is connected with the first plate body and arranged at an angle, the second plate body extends into the movable box, when the movable nested range hood is in a closed state, the first plate body is closed at the vent of the movable box, when the movable nested range hood is in an open state, the first plate body opens the vent of the movable box, the opening and closing plate blocks the first part through the first plate body, or the opening and closing plate blocks the first part through the second plate body, or the opening and closing plate blocks the first part through the transition position of the first plate body and the second plate body.

[0031] Therefore, the gap front side can be closed by the opening and closing plate at least, so as to avoid pressure relief from the front side, not only improve the oil fume suction effect, but also avoid the oil fume flowing to the user and reduce the use experience.

[0032] Further, the outer periphery of the gap comprises a second part, which is the space between the two side edges of the movable box outlet along the width direction of the movable nested range hood and the top box in the vertical direction;

[0033] The opening and closing plate further comprises a third plate body, which is arranged on the opposite sides of the first plate body along the width direction of the movable nested range hood, when the movable nested range hood is in an open state, the third plate body blocks the second part.

[0034] Therefore, the left and right sides of the gap width direction can be closed by the opening and closing plate at least, so as to avoid pressure relief from the two sides, thereby improving the oil fume suction effect.

[0035] Further, in order to avoid oil leakage from the front side of the second plate body when the machine is turned off, the opening and closing plate further comprises a fourth plate body, which is connected with the first plate body and arranged at an angle, when the movable nested range hood is in a closed state, the fourth plate body extends upward from the front end of the first plate body.

[0036] Further, in order to facilitate the installation of the opening and closing plate, a fan is arranged in the top box, the top box comprises an adapter, the adapter is higher than the vent part, the adapter is arranged below the fan, and the opening and closing plate is rotationally connected with the adapter.

[0037] Further, in order to avoid pressure relief caused by the exposure of the adapter, the top box further comprises a mounting part at the bottom, and the vent part is located at the rear side of the mounting part.

[0038] Further, to increase the air flow resistance of the movement gap between the opening and closing plate and the adapter, prevent air flow leakage, the top box comprises an adapter and a fan frame, the adapter is higher than the ventilation part, the fan frame is provided with a fan, the adapter is connected below the bottom of the fan frame, and the opening and closing plate is rotationally connected with the adapter.

[0039] The third plate body of the opening and closing plate is located on the opposite sides of the adapter along the width direction of the movable nested range hood, and the third plate body of the opening and closing plate and the adapter at least partially overlap when the movable nested range hood is in the open state.

[0040] Further, to facilitate driving the opening and closing plate, the movable nested range hood further comprises a movement mechanism, the movement mechanism comprises a driving mechanism and a driving arm rotationally driven by the driving mechanism, the driving arm is rotationally connected with the top box and the rotation center is located on the top box, and the driving arm is fixed with the opening and closing plate and can drive the opening and closing plate to rotate.

[0041] Further, the movement mechanism further comprises a connecting rod, the connecting rod is rotationally connected with the driving arm and the movable box respectively, and the opening and closing plate and the movable box are linked, so that the movement mechanism is simplified.

[0042] According to one aspect of the present application, the movable box can rotate relative to the fixed box around the rotation axis extending in the width direction of the movable nested range hood. By rotating, the gap in the height direction between the movable box and the ventilation part at the bottom of the top box can be conveniently formed, without the need for specific design of the area of the ventilation part at the bottom of the top box, and by rotating the fixed box, the bottom box can provide a gradually expanding flow channel when the movable nested range hood is working, which helps the oil fume to accelerate upward flow.

[0043] According to another aspect of the present application, the movement form of the movable box relative to the fixed box is that the movable box can translate relative to the fixed box in the depth direction of the movable nested range hood, and the ventilation part is inclined or stepped relative to the horizontal direction. In this movement form, the opening on the front side of the fixed box is located on the rear side of the gap.

[0044] According to another aspect of the present application, the movement form of the movable box relative to the fixed box is that the movable box can be lifted and lowered relative to the fixed box, and the outlet of the movable box is located on the front side of the fixed box.

[0045] Compared with the prior art, the present application has the following advantages:

[0046] The high-speed airflow flows out from the outlet of the movable box to the top box, the edge of the outlet of the movable box is located in the stage where the depth of the flow channel increases from small to large, and the airflow separates at the edge of the outlet of the movable box when passing through the position of the outlet of the movable box, thereby forming a main flow continuously upward along the original path and a separated flow (a local small area circulating flow, i.e. a separated flow) which deviates from the main flow, if the separated flow directly leads to the top box, the vortex of the separated flow will form a Karman vortex street like a cylindrical spoiler, causing the partial or even global blockage of the air duct in the top box, especially when the airflow enters the top box, there is a significant pressure expansion process, in which the subsequent development of the vortex will be more serious, therefore, the transition flow channel formed by the gap is needed to actively control the separated flow at the outlet of the movable box.

[0047] Firstly, the separated flow formed at the outlet of the movable box is affected by the increase of the flow channel, the local separated flow is accumulated in front of the transition flow channel, the separated flow and the main flow have the same flow direction in the transition flow channel, so that the main flow directly hits the top box along the side of the separated flow. At the same time, since the flow channel at the connection between the fixed box and the top box is directly in fluid communication with the gap, the transition flow channel is enlarged relative to the flow channel of the bottom box, when the airflow flows from the narrow flow channel of the bottom box to the wide flow channel of the top box, the cross-sectional area of the flow channel increases, according to Bernoulli's principle, the flow velocity decreases, and the dynamic pressure is converted into static pressure, resulting in an increase in static pressure, thereby forming an adverse pressure gradient along the flow direction of the airflow, and the separated flow can provide a virtual, aerodynamic and streamlined flow guide surface for the main flow, the main flow diffuses along the flow guide surface to the top box, greatly relieving the problem of adverse pressure gradient.

[0048] Secondly, the separated flow circulates in order in the transition flow channel, forming a backflow area, so the airflow speed in the backflow area is low, that is, the backflow area acts as a buffer area to effectively separate and manage the main flow and the separated flow in space. Moreover, the separated flow is not easy to separate from the transition flow channel, because the airflow enters the top box to form an expansion, the flow velocity decreases, the negative pressure increases, and the negative pressure of the main flow is higher than that of the separated flow, so that the separated flow does not easily separate from the transition flow channel, and guides the main flow to complete efficient diffusion, and finally realizes a relatively stable flow field on the wall surface in the top box, which is not disturbed and blocked by the separated flow. BRIEF DESCRIPTION OF DRAWINGS

[0049] Figure 1 The figure is a closed state schematic diagram of the activity nested range hood of the first embodiment of the present application;

[0050] Figure 2 The figure is a closed state schematic diagram of the activity nested range hood of the first embodiment of the present application (seen from back to front);

[0051] Figure 3 The figure is a closed state side view of the activity nested range hood of the first embodiment of the present application;

[0052] Figure 4 Fig. 6 is a sectional side view of the closed state of the active nested range hood according to the first embodiment of the present application;

[0053] Figure 5 Fig. 7 is a partial I enlarged view of the active nested range hood according to the first embodiment of the present application; Figure 4

[0054] Figure 6 Fig. 8 is a schematic view of the bottom box of the active nested range hood according to the first embodiment of the present application;

[0055] Figure 7 Fig. 9 is an exploded structural schematic view of the bottom box of the active nested range hood according to the first embodiment of the present application;

[0056] Figure 8 Fig. 10 is a schematic view of the opening and closing plate and the moving mechanism of the active nested range hood according to the first embodiment of the present application;

[0057] Figure 9 Fig. 11 is an exploded structural schematic view of the top box and the fan of the active nested range hood according to the first embodiment of the present application;

[0058] Figure 10 Fig. 12 is a schematic view of the open state of the active nested range hood according to the first embodiment of the present application;

[0059] Figure 11 Fig. 13 is a side view of the open state of the active nested range hood according to the first embodiment of the present application;

[0060] Figure 12 Fig. 14 is a sectional side view of the open state of the active nested range hood according to the first embodiment of the present application;

[0061] Figure 13 Fig. 15 is a sectional side view of the open state of the active nested range hood according to the first embodiment of the present application (the section plane is parallel to the Figure 12 Fig. 16 is a sectional side view of the open state of the active nested range hood according to the first embodiment of the present application (only the top box and the inside thereof are sectioned, and the opening and closing plate and the moving mechanism are hidden);

[0062] Figure 14 Fig. 17 is a schematic view of the open state of the active nested range hood according to the first embodiment of the present application (the smoke baffle, the air inlet plate, the opening and closing plate, and the moving mechanism are hidden);

[0063] Figure 15 Fig. 18 is a perspective view of the open state of the active nested range hood according to the first embodiment of the present application;

[0064] Figure 16 Fig. 19 is a sectional perspective view of the open state of the active nested range hood according to the first embodiment of the present application;

[0065] ​Figure 17 Cooperation diagram of the adapter and the opening and closing plate of the movable nested range hood of the first embodiment of the present application;

[0066] Figure 18 Cross-sectional view (horizontal section) of the bottom box of the movable nested range hood of the first embodiment of the present application;

[0067] Figure 19 Partial II enlarged diagram of Figure 18 ;

[0068] Figure 20 Cross-sectional view (section is perpendicular to Figure 18 ) of the bottom box of the movable nested range hood of the first embodiment of the present application;

[0069] Figure 21 Partial III enlarged diagram of Figure 20 ;

[0070] Figure 22 Closed state diagram of the movable nested range hood of the second embodiment of the present application;

[0071] Figure 23 Closed state cross-sectional view of the movable nested range hood of the second embodiment of the present application;

[0072] Figure 24 Open state diagram of the movable nested range hood of the second embodiment of the present application;

[0073] Figure 25 Open state side view of the movable nested range hood of the second embodiment of the present application;

[0074] Figure 26 Open state cross-sectional view of the movable nested range hood of the second embodiment of the present application;

[0075] Figure 27 Closed state diagram of the movable nested range hood of the third embodiment of the present application;

[0076] Figure 28 Open state diagram of the movable nested range hood of the third embodiment of the present application;

[0077] Figure 29 Open state side view of the movable nested range hood of the third embodiment of the present application;

[0078] Figure 30 Closed state diagram of the movable nested range hood of the fourth embodiment of the present application;

[0079] Figure 31Fig. 4 is a schematic view of the open state of the active nested range hood according to the fourth embodiment of the present application;

[0080] Figure 32 Fig. 5 is a side view of the open state of the active nested range hood according to the fourth embodiment of the present application;

[0081] Figure 33 Fig. 6 is a schematic view of the closed state of the active nested range hood according to the fifth embodiment of the present application;

[0082] Figure 34 Fig. 7 is a schematic view of the open state of the active nested range hood according to the fifth embodiment of the present application;

[0083] Figure 35 Fig. 8 is a schematic view of the closed state of the active nested range hood according to the sixth embodiment of the present application;

[0084] Figure 36 Fig. 9 is a schematic view of the open state of the active nested range hood according to the sixth embodiment of the present application;

[0085] Figure 37 Fig. 10 is a schematic view of the closed state of the active nested range hood according to the seventh embodiment of the present application;

[0086] Figure 38 Fig. 11 is a schematic view of the open state of the active nested range hood according to the seventh embodiment of the present application;

[0087] Figure 39 Fig. 12 is a schematic view of the open state of the active nested range hood according to the seventh embodiment of the present application (with the opening and closing plate hidden).

[0088] 11, movable box; 111, movable box top plate; 112, movable box left side plate; 113, movable box right side plate; 114, movable box side sealing plate; 1141, movable box side sealing part; 1142, movable box side bending part; 115, movable box top sealing plate; 1151, movable box top sealing part; 1152, movable box top bending part; 116, movable box outlet; 12, fixed box; 121, fixed box top plate; 122, fixed box left side plate; 123, fixed box right side plate; 124, fixed box back plate; 125, fixed box side sealing plate; 1251, fixed box side sealing part; 1252, fixed box side bending part; 126, fixed box top sealing plate; 13, air inlet plate; 131, air inlet top plate; 132, air inlet left side plate; 133, air inlet right side plate; 134, air inlet main plate; 135, air inlet; 14, box rotating shaft; 2, top box; 21, fixed box air vent; 22, movable box air vent; 23, adapter; 24, fan frame; 25, fan cover; 251, mounting part; 3, smoke baffle; 4, opening and closing plate; 41, first plate body; 42, second plate body; 43, third plate body; 44, fourth plate body; 45, fifth plate body; 5, fan; 61, driving mechanism; 621, driving arm; 622, connecting rod; 623, air inlet plate rotating shaft; 624, transmission shaft; 7, lighting device; N1, lower air inlet point; N2, upper air inlet point; N3, air point; Q, smoke cavity; S, gap; S1, first part; S2, second part; X, middle arrow. DETAILED DESCRIPTION

[0089] The application will be further described below in conjunction with the embodiments with reference to the accompanying drawings.

[0090] In the description of the present application, it needs to be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, since the disclosed embodiments of the present application can be arranged in different directions, so these orientation-indicating terms are only illustrative and should not be regarded as limiting, such as "upper" and "lower" are not necessarily limited to the direction opposite or consistent with the direction of gravity. In addition, the features defined as "first" and "second" can be explicitly or implicitly included one or more features.

[0091] Embodiment one

[0092] Reference Figures 1-13The application discloses a movable nested range hood, which comprises a bottom box and a top box 2 arranged above the bottom box, wherein the bottom box comprises a movable box 11 and a fixed box 12; the movable box 11 comprises a movable box top plate 111, a movable box left side plate 112 and a movable box right side plate 113, and the movable box top plate 111 is located between the top of the movable box left side plate 112 and the top of the movable box right side plate 113; the fixed box 12 comprises a fixed box top plate 121, a fixed box left side plate 122 and a fixed box right side plate 123, and the fixed box top plate 121 is located between the top of the fixed box left side plate 122 and the top of the fixed box right side plate 123.

[0093] The movable box 11 and the fixed box 12 are nested; in the embodiment, the movable box 11 is sleeved outside the fixed box 12, so that the movable box top plate 111 is located above the fixed box top plate 121, the movable box left side plate 112 is located left of the fixed box left side plate 122, and the movable box right side plate 113 is located right of the fixed box right side plate 123; in order to avoid the top box 2, the movable box top plate 111 and the fixed box top plate 121 are both provided with a notch, so that the two boxes are both at least top-opened; specifically, the notch is formed on the movable box top plate 111 and forms a movable box outlet 116 for the outflow of oil fume, and the movable box outlet 116 corresponds to below the top box 2; the fixed box 12 further comprises a fixed box back plate 124 connected between the rear end portions of the fixed box left side plate 122 and the fixed box right side plate 123 and located close to a wall surface during installation; and the front side of the fixed box 12 is at least partially open, and in the embodiment, the front side is completely open.

[0094] By nesting the fixed box 12 in the movable box 11, when the movable nested range hood is in a closed state, the movable box 11 and the fixed box 12 share part of the space, the appearance is neat, the occupied space is small, and the movable nested range hood is convenient to clean, does not affect the installation space of the kitchen, and does not damage the decoration effect of the kitchen; when the movable nested range hood is in an open state, the movable box 11 is moved to a position where the movable box outlet 116 is at least partially located in front of the fixed box 12, the oil fume generated and rising outside the cooking bench is as close as possible to the cooking bench to achieve the effect of gathering the oil fume, so that the suction force of the oil fume is further enhanced, the outflow of the oil fume is prevented, the amount of gathered oil fume and the oil fume suction rate of the movable nested range hood are improved, and the air quality in the kitchen is improved and the influence on human health is reduced.

[0095] In addition, since the movable box outlet 116 is at least partially located in front of the fixed box 12 when the active nested range hood is in the open state, a flow channel for the separated flow to pass through can be formed in front of the fixed box 12. When the oil fume flow flows along the bottom box to the diffuser area in the top box 2, it needs to pass through the flow channel formed by the movement of the movable box 11 first. This flow channel is used for the control of the separated flow, which can increase the total flow channel depth of the bottom box forward, so as to realize the gradual diffuser of the air inlet on the bottom box (main flow). The main flow can gradually expand.

[0096] The fixed box 12 can be fixed with the top box 2, or can rotate, translate, etc. relative to the top box 2. The movable box 11 and the fixed box 12 are rotationally connected by the box shaft 14 near the bottom of the fixed box 12. See Figure 12 The movable box 11 can rotate relative to the fixed box 12 around the axis extending in the width direction of the active nested range hood (the width direction is the left-right direction of the active nested range hood when the user faces the active nested range hood in the normal installation state of the active nested range hood. See Figure 10 The arrow X shown in the figure) The center line of the box shaft 14 constitutes the rotation center of the movable box 11. In the off state of the active nested range hood, the fixed box 12 is embedded in the movable box 11 and almost does not protrude from the movable box 11. See Figure 3 At this time, the movable box top plate 111 of the movable box 11 is almost flush with the bottom surface of the top box 2; in the on state of the active nested range hood, the movable box 11 rotates forward relative to the fixed box 12, so that the overall thickness of the movable box 11 and the fixed box 12 increases. See Figure 11 At this time, the movable box top plate 111 of the movable box 11 is located below the top box 2, that is, the movable box outlet 116 is also located below the top box 2.

[0097] By placing the box shaft 14 at the position where the two boxes overlap, the upper parts of the movable box 11 and the fixed box 12 are close to intersect when opened, the rear side of the movable box top plate 111 of the movable box 11 and the front side of the fixed box top plate 121 of the fixed box 12 have basically no overlapping area, and the overlapping section is ≤20mm. Thus, the two boxes are used to the maximum extent, and the maximum box size after unfolding is formed, thereby solving the problem of air performance channel opening and relatively more smooth effect. Currently, the actual problem of 30-31 cubic meters per minute is not considered. This connection method can solve the problem of the upper end air inlet channel limitation and the placement position of the movable hinge (box shaft 14) of the movable box 11.

[0098] To avoid interference between the fixed box left side plate 122 and the fixed box right side plate 123 of the fixed box body 12 and the corresponding side plates of the movable box body 11, a safety gap of 3-5 mm needs to be left, which, however, is likely to cause air intake or smoke leakage when the movable nested range hood is opened, so the gap needs to be sealed. To this end, referring to Figure 7 , Figure 18 and Figure 19 , the rear end of the movable box left side plate 112 and the movable box right side plate 113 of the movable box body 11 is respectively provided with a movable box side sealing plate 114, and the left side of the fixed box left side plate 122 and the right side of the fixed box right side plate 123 of the fixed box body 12 is respectively provided with a fixed box side sealing plate 125. For ease of description, the inner side of the movable nested range hood in the width direction is the side from the left and right sides to the middle, i.e., the right side of the left component and the left side of the right component; the outer side of the movable nested range hood in the width direction is the side away from the middle, i.e., the left side of the left component and the right side of the right component.

[0099] The movable box side sealing plate 114 includes a movable box side sealing portion 1141 extending from the rear end of the corresponding side plate to the inner side in the width direction of the movable nested range hood and a movable box side bending portion 1142 extending from the end of the movable box side sealing portion 1141 to the front. The fixed box side sealing plate 125 includes a fixed box side sealing portion 1251 extending from the corresponding side plate to the direction away from the corresponding side plate and a fixed box side bending portion 1252 extending from the end of the fixed box side sealing portion 1251 to the rear, i.e., the left fixed box side sealing portion 1251 extends to the left from the left side of the fixed box left side plate 122, and the right fixed box side sealing portion 1251 extends to the right from the right side of the fixed box right side plate 123.

[0100] To avoid interference between the fixed box top plate 121 of the fixed box body 12 and the movable box top plate 111 of the movable box body 11, a certain safety gap needs to be left, for which, referring to Figure 7 , Figure 20 and Figure 21 , the rear end of the movable box top plate 111 of the movable box body 11 is formed with a movable box top sealing plate 115, and the front end of the fixed box top plate 121 of the fixed box body 12 is formed with a fixed box top sealing plate 126. The movable box top sealing plate 115 includes a movable box top sealing portion 1151 extending from the end of the movable box top plate 111 downward and a movable box top bending portion 1152 extending from the lower end of the movable box top sealing portion 1151 to the front. The fixed box top sealing plate 126 extends upward from the front end of the fixed box top plate 121.

[0101] When the active nested range hood is in the open state, the active box side sealing part 1141 is located at the rear side of the fixed box side sealing part 1251, and the fixed box side bending part 1252 is located at the outer side of the active box side bending part 1142 in the width direction of the active nested range hood. Therefore, the active box side sealing plate 114 and the fixed box side sealing plate 125 form a labyrinth sealing structure. When the active nested range hood is opened, the gap between the fixed box body 12 and the active box body 11 can be sealed to a certain extent. The active box top sealing plate 115 is located at the rear side of the fixed box top sealing plate 126, and the gap between them is 1mm-2mm (the distance between the front side end of the active box top bending part 1152 and the fixed box top sealing plate 126). The sealing structure can better prevent wind whistling and smoke running.

[0102] Referring to Figure 9 and Figure 17 , the top box 2 comprises an adapter 23, a fan frame 24 and a fan cover 25, and the adapter 23 is higher than the ventilation part. The fan 5 is arranged in the fan frame 24, the bottom of the fan frame 24 is open, and the adapter 23 is connected below the bottom of the fan frame 24. The adapter 23 is a frame structure with an open top, and the shape and size of the cross section of the adapter 23 can be adapted to the fan frame 24 respectively. The bottom surface of the adapter 23 gradually inclines downward from front to back, and preferably in a grid shape, to receive the oil flowing down from the fan frame 24 and preferably guide the oil backward. The fan cover 25 covers at least the outside of the adapter 23. In this embodiment, the fan cover 25 covers the outside of the fan frame 24 and the adapter 23, and the lowest part of the adapter 23 is not lower than the fan cover 25. The fan cover 25 comprises a bottom mounting part 251, which can be a solid plate or a cavity. The lighting device 7 can be arranged on the mounting part 251. The adapter 23 can be used to guide airflow, filter oil fume, and provide a mounting base for the motion mechanism described below.

[0103] The ventilation part is formed at the connection between the bottom box and the top box 2, so that the bottom box and the top box 2 are in fluid communication. The ventilation part comprises a fixed box vent 21 and an active box vent 22 located in front of the fixed box vent 21, and the two vents are in communication with each other. In the horizontal plane projection, the fixed box vent 21 corresponds to the fixed box 12. When the active box 11 is rotated forward relative to the fixed box 12 to open, the top of the active box 11 and the fixed box 12 correspond to the two vents together. The mounting part 251 extends forward from the front side edge of the ventilation part.

[0104] The active nested range hood further comprises a smoke baffle 3 and an opening and closing plate 4, wherein the smoke baffle 3 can cover the front face of the active box 11 (the face facing the user in the normal installation state) when the range hood is turned off, and can rotate forward to open relative to the active box 11 when the range hood is turned on, so as to form a smoke gathering cavity Q with the front face of the active box 11.

[0105] The opening and closing plate 4 is partially arranged in the bottom box and partially arranged in the top box 2, and when the smoke baffle 3 is opened, the opening and closing plate 4 opens the fixed box air vent 21 and the active box air vent 22, and when the smoke baffle 3 is closed, the opening and closing plate 4 closes the active box air vent 22. By arranging the opening and closing plate 4, the ventilation area of the connection between the top box 2 and the bottom box can be increased when the active nested range hood is opened and works, so as to promote the oil fume to rise quickly and be sucked into the fan 5 arranged in the top box 2, and when the active nested range hood is closed, part of the ventilation area is closed, so that the bottom box can be designed to be ultra-thin. When the opening and closing plate 4 is partially arranged in the bottom box, in the opened state, the leakage of oil fume between the opening and closing plate 4 and the bottom box can be avoided, and in the closed state, the oil liquid condensed on the opening and closing plate 4 can be guided downward to avoid seeping between the opening and closing plate 4 and the bottom box.

[0106] The opening and closing plate 4 comprises a first plate body 41 and a second plate body 42, the second plate body 42 is fixed to the back face of the smoke baffle 3, and the first plate body 41 is connected with the second plate body 42 and arranged at an angle, when the smoke baffle 3 is opened, the first plate body 41 extends in the top box 2 by gradually tilting backward from top to bottom, when the smoke baffle 3 is closed, the first plate body 41 is closed at the active box air vent 22, and the second plate body 42 extends into the bottom box.

[0107] The opening and closing plate 4 further comprises a third plate body 43 and a fourth plate body 44, the fourth plate body 44 is connected with the first plate body 41 and arranged at an angle, when the smoke baffle 3 is closed, the fourth plate body 44 extends upward from the front side end of the first plate body 41 and is arranged at an interval with the bottom of the adapter 23. The existence of the fourth plate body 44 can play a role of oil collection when the active nested range hood is closed, so that the oil liquid on the first plate body 41 cannot flow forward, but can only flow along the fourth plate body 44, the first plate body 41 and the second plate body 42 and then flow into the bottom box. The third plate body 43 is arranged on both sides of the first plate body 41 and the fourth plate body 44. When the active nested range hood is opened, the projection of the upper end (the upper end point in the cross section shown in Figure 13 ) of the opening and closing plate 4 on the horizontal plane is outside the projection of the lower end (the lower end point in the cross section shown in Figure 13 ) on the horizontal plane, and when the active box 11 is opened, the projection of the upper end (the upper end point in the cross section shown in Figure 13 ) of the opening and closing plate 4 on the horizontal plane is outside the projection of the lower end (the lower end point in the cross section shown in Figure 13 ) on the horizontal plane.

[0108] The lower end of the hinge plate 4 is designated as the lower air inlet point N1 (with... Figure 13 The sectional side view shown is used for illustration, so the air inlet point here is a single point (the same applies below). The opening and closing plate 4 also includes a fifth plate 45 extending downward from the lower end of the second plate 42. In the open state, the fifth plate 45 gradually tilts backward from top to bottom. The lower end of the fifth plate 45 is positioned as the aforementioned lower air inlet point, which is enveloped or overlapped by the outline of the portion of the movable housing 11 located above the air inlet plate 13 (some local positions may not overlap due to installation structure, etc.). After overlap, the direction of the air entering from the outside of the movable housing 11 along the gap between the movable housing 11 and the air inlet plate 13 is prevented from blowing directly into the air duct and causing airflow blockage. Instead, the air needs to flow downward along the fifth plate 45 to the lower air inlet point and then upward. At the same time, it satisfies the requirement of low static pressure leakage, which can reduce airflow leakage at the mating position and control the gap to be less than or equal to 10mm. The design of the third plate 43 of the opening and closing plate 4 can be used to prevent the airflow between the movable housing 11 and the air inlet plate 13 from directly rushing into the interior of the top housing 2.

[0109] The second plate 42 and the fifth plate 45 can both guide the airflow and guide the received oil into the movable box 11.

[0110] The upper end of the fourth plate 44 is designated as the upper air inlet N2. Due to appearance limitations, there is one or more process air inlets N3 between the upper air inlet N2 and the lower air inlet N1, such as at the bend between the second plate 42 and the fifth plate 45. The projection of the process air inlet N3 on the horizontal plane is located outside (front of) the projection of the lower air inlet N1 on the horizontal plane to avoid local airflow constriction. The local airflow ramp formed by the line connecting the process air inlet N3 and the upper air inlet N2, and the local airflow ramp formed by the line connecting the process air inlet N3 and the lower air inlet N1, should both satisfy the requirement of gradually increasing inclination angle.

[0111] See Figure 16 and Figure 17 The third plate 43 of the opening and closing plate 4 is located on both sides of the adapter 23 (i.e., on both sides along the width direction of the movable nested range hood). In the open state, the third plate 43 of the opening and closing plate 4 and the adapter 23 at least partially overlap. This increases the airflow resistance of the movement gap between the opening and closing plate 4 and the adapter 23 of the top housing 2, preventing airflow leakage at this point. At the same time, the fourth plate 44 of the opening and closing plate 4 is either in close contact with the bottom surface of the adapter 23 or has a slight gap.

[0112] See Figure 4 and Figure 5When the active nested range hood is closed, the front end of the first plate 41 of the opening and closing plate 4, the fourth plate 44, and the lighting device 7 at the bottom of the top box 2 are spaced apart to avoid interference. At the same time, the rear end of the third plate 43 is vertical and close to the rear side of the fan cover 25.

[0113] See Figure 8 and Figure 13 The nested range hood also includes a motion mechanism, which includes a drive mechanism 61 and a drive arm 621 driven by the drive mechanism 61. The drive arm 621 is rotatably connected to the top housing 2, and its rotation center is located on the top housing 2. The drive mechanism 61 can be an electric push rod or a motor. By setting a third plate 43, the sealing with the left and right sides of the top housing 2 is improved. The first plate 41 and the fourth plate 44 extend from their respective left and right sides to form corresponding third plates 43. The drive arm 621 is fixedly set inside the third plate 43. The transmission mechanism can have two sets set on the left and right sides of the opening and closing plate 4. The drive mechanism 61 drives one of the drive arms 621 to rotate, and a transmission shaft 624 can be connected between the two drive arms 621 to achieve synchronous rotation. Thus, the drive mechanism 61 can drive the smoke baffle 3 and the opening and closing plate 4 to rotate. The smoke baffle 3 and the opening and closing plate 4 are fixed on a drive arm 621 of the motion mechanism, so that the drive arm 621 of the motion mechanism, the smoke baffle 3 and the opening and closing plate 4 rotate together around the rotation point of the top box 2. The opening and closing plate 4 opens when the smoke baffle 3 opens, which results in a relatively small structural and cost burden.

[0114] Both the drive mechanism 61 and the drive arm 621 described above can be installed with the adapter 23. For example, the drive mechanism 61 can be installed inside the adapter 23, and the drive arm 621 can be installed on the left and right sides of the adapter 23. The drive shaft 624 passes through the adapter 23 and connects to the drive arm 621.

[0115] The motion mechanism also includes a connecting rod 622, one end of which is rotatably connected to the drive arm 621, and the other end of which is rotatably connected to the movable housing 11, thereby linking the movable housing 11 with the smoke baffle 3 and the opening and closing plate 4. Alternatively, the movable housing 11 can also be driven independently.

[0116] When the active nested range hood is opened, the smoke inlet can be directly opened by the active box 11 to realize smoke inlet, or the bottom box further includes the air inlet plate 13 arranged on the active box 11 as described in the embodiment. The air inlet plate 13 includes an air inlet top plate 131, an air inlet left side plate 132, an air inlet right side plate 133, and an air inlet main plate 134. The air inlet top plate 131 extends into the active box 11 from the top of the air inlet main plate 134. The air inlet left side plate 132 extends into the active box 11 from the left end of the air inlet main plate 134. The air inlet right side plate 133 extends into the active box 11 from the right end of the air inlet main plate 134. The air inlet main plate 134 is provided with an air inlet 135. The air inlet plate 13 can also rotate relative to the active box 11. It can be independently driven, or as shown in the embodiment, the air inlet plate 13 is rotatably connected to the active box 11 at the left and right sides near the bottom through a rotating shaft, and the connection part can slide up and down (this is prior art, please refer to the disclosure of the Chinese patent with the application number 202221530291.1 of the applicant). The air inlet plate 13 is connected to the movement mechanism at a position close to the top, such as the bending part of the air inlet top plate 131 and the air inlet main plate 134. The movement mechanism further includes an air inlet plate rotating shaft 623 connected to the driving arm 621. The air inlet plate rotating shaft 623 extends along the left and right directions of the active nested range hood. The air inlet plate rotating shaft 623 rotatably connects the driving arm 621 and the air inlet plate 13, and can drive the air inlet plate 13 to rotate when the driving arm 621 rotates. When the active nested range hood is in the closed state, the air inlet plate 13 is stored in the active box 11. When the active nested range hood is opened, the air inlet plate 13 is rotated forward to expose the active box 11. At this time, the air inlet top plate 131, the air inlet left side plate 132, and the air inlet right side plate 133 are at least located in the active box 11 at the rear end to avoid pressure relief from the top and the left and right sides.

[0117] Through the above structure, when the active nested range hood is in the closed state, the bottom box remains thin. When it is in the open state, the active box 11, the air inlet plate 13, the opening and closing plate 4, and the smoke baffle 3 are linked to open. The active nested range hood forms a climbing (the cross section from bottom to top is basically gradually increasing) air inlet channel. The lower end of the opening and closing plate 4 is wrapped by the inclined active box 11, which is approximately equal to the intersection point of the inclined air duct of the bottom box, realizing the smooth air performance and smoke suction effect of the active nested range hood in the open state. Of course, the smoke baffle 3 and the active box 11 can also be independently driven.

[0118] When the active nested range hood is in the closed state, the top of the active box 11 is at least located in part of the ventilation position, in this embodiment, at the fixed box ventilation opening 21, that is, there is no gap in the height direction between the active box 11 and the ventilation position at this time. Since the movement of the active box 11 relative to the fixed box 12 is rotation, once the active box 11 is rotated forward relative to the fixed box 12 from the closed state, there is a gap S between the top of the active box 11 and the bottom of the top box 2 (i.e., the active box ventilation opening 22 of the ventilation position) in the height direction of the active nested range hood. See Figure 14 and Figure 15 , the front of the active box 11 is in a state of gradually tilting backward from top to bottom. The gap S increases as the rotation angle of the active box 11 increases, and the gap S also exists before reaching the closed state when starting from the open position to the closed state, and the gap S gradually decreases during the closing process. The flow channel formed at the connection between the fixed box 12 and the top box 2, i.e., the space below the fixed box ventilation opening 21 and the front side of the fixed box back plate 124 of the fixed box 12, is released due to the rotation of the active box 11, thereby being directly in fluid communication with the gap S, which expands the space in front of the fixed box back plate 124 of the fixed box 12. In addition, in this embodiment, since the active box top plate 111 of the active box 11 needs to avoid the top box 2 and meet the demand for air intake of the active box ventilation opening 22, the part that actually faces the bottom of the top box 2 is the active box outlet 116 described above, but the active box outlet 116 is almost flush with the top box 2 in the width direction of the active nested range hood, i.e., it should not protrude beyond the top box 2 (to prevent pressure relief) nor should it be retracted (to prevent interference between the active box top plate 111 and the top box 2 during rotation). The active box outlet 116 is also used for oil fume to pass through. Therefore, in addition to existing between the edge of the bottom of the top box 2 in the width direction and the active box top plate 111 (i.e., the space below the left and right sides of the top box 2), the gap S also exists between the active box outlet 116 and the bottom of the top box 2.

[0119] After the oil fume enters the bottom box, it rises upward along the climbing wind channel formed by the active box 11 and the fixed box 12, gradually turns under the guidance of the active box 11, and gradually diffuses and enters the top box 2 when passing through the gap S, without needing to pass through the right-angle turning position as in the prior art, reducing the generation of vortex. The same effect is achieved even if the active box 11 is not tilted (without needing to pass through the right-angle turning position as in the prior art).

[0120] Since the outer periphery of the gap S is not shielded, there is a possibility of pressure relief here, the outer periphery of the gap S includes the following first part S1 and the second part S2, wherein the first part S1 refers to the space in the vertical direction between the top of the movable nested range hood 2 along the two sides of the movable nested range hood in the width direction to the top of the movable box 11; the second part S2 refers to the space between the upward top box 2 along the two side edges of the movable box outlet 116 in the width direction of the movable nested range hood. To this end, the opening and closing plate 4 is used to shield the outer periphery of the gap S. Specifically, the first part S1 is shielded by the transition position between the third plate body 43, the second plate body 42, the first plate body 41 or the second plate body 42 and the first plate body 41 of the opening and closing plate 4, and the second part S2 is shielded by the third plate body 43.

[0121] The fan 5 and the driving mechanism 61 can be intelligently controlled by voice, so that the movable nested range hood can be equipped with an intelligent voice control module, which includes a controller, a voice receiving module and a voice analysis module, etc. The voice receiving module can receive user instructions, and the voice analysis module can analyze the instructions. According to the analyzed instructions, the corresponding operation is controlled to be executed, so as to realize the intelligent control of the movable nested range hood and improve the user experience of using the movable nested range hood.

[0122] Embodiment two

[0123] Referring to Figures 22-26 In this embodiment, the difference from the above-mentioned embodiment one is that the fixed box 12 is nested outside the movable box 11. Since the movable box 11 is inside, it is not necessary to set the two anti-docking labyrinth sealing structures as shown in embodiment one.

[0124] Similarly, when the movable box 11 is rotated forward to open, a gap S will also be generated between the top of the movable box 11 and the bottom of the top box 2, which is also shielded by the opening and closing plate 4. At this time, the front side of the fixed box 12 higher than the part of the movable box 11 can be open, and the gap S is directly in fluid communication with the flow channel at the connection between the fixed box 12 and the top box 2 through the opening of the front side of the fixed box 12, so that the flow channel of the bottom box is expanded.

[0125] Embodiment three

[0126] Referring to Figures 27-29 In this embodiment, the difference from the above-mentioned embodiment one is that in embodiment one, the height of the movable box 11 is slightly greater than that of the fixed box 12, and after the movable box 11 is rotated, the front appearance of the entire bottom box changes. In this embodiment, the rotating connection between the movable box 11 and the fixed box 12 is located at the approximately middle position in the height direction of the fixed box 12, but similarly, after it is rotated forward, a gap is formed between the bottom of the movable box 11 and the top box 2.

[0127] Embodiment Four

[0128] Referring to Figures 30-32 In this embodiment, the fixed cabinet 12 is nested outside the movable cabinet 11, unlike the above-mentioned embodiment three. Since the movable cabinet 11 is inside, the two anti-docking labyrinth sealing structures as shown in embodiment one can be dispensed with.

[0129] Embodiment Five

[0130] Referring to Figure 33 and Figure 34 In this embodiment, the bottom surface of the top cabinet 2 is inclined downward from front to back at least in the portion corresponding to the movable cabinet air vent 22, unlike the above-mentioned embodiment one. Thus, when the movable nested range hood is opened, the movable cabinet 11 is translated forward relative to the fixed cabinet 12 and moves under the inclined movable cabinet air vent 22, thus producing a gap in the height direction of the movable nested range hood. The shutter 4 can open and close the movable cabinet air vent 22 by rotating relative to the top cabinet 2 and shield the gap in the open state.

[0131] The fixed cabinet 12 is nested outside the movable cabinet 11 as shown in the figure, but alternatively, the movable cabinet 11 can be nested outside the fixed cabinet 12.

[0132] Embodiment Six

[0133] Referring to Figure 35 and Figure 36 In this embodiment, the fixed cabinet 12 is nested outside the movable cabinet 11, unlike the above-mentioned embodiment five, and the top of the movable cabinet 11 is lower than the bottom surface of the top cabinet 2, i.e. lower than the movable cabinet air vent 22, in the closed state. When the movable nested range hood is opened, the movable cabinet 11 is translated forward relative to the fixed cabinet 12 and moves under the movable cabinet air vent 22, thus producing a gap in the height direction of the movable nested range hood. The shutter 4 can open and close the movable cabinet air vent 22 by lifting and lowering relative to the top cabinet 2 and shield the gap in the open state.

[0134] Embodiment Seven

[0135] Referring to Figures 37-39In the present embodiment, different from the above-mentioned embodiment five, the movable box 11 is at least partially nested outside the fixed box 12, the fixed box 12 is raised and lowered relative to the movable box 11 in the up-down direction, and the front side of the movable box 11 protrudes forward beyond the fixed box 12. When the movable nested range hood is in the closed state, the movable box 11 can be completely wrapped outside the fixed box 12. When the movable nested range hood is opened, the movable box 11 is lowered relative to the fixed box 12, and the fixed box 12 is at least partially exposed, the opening and closing plate 4 can open and close the movable box air vent 22 by rotating relative to the top box 2, and shield the gap in the open state.

[0136] The "fluid communication" referred to in the present application refers to the spatial relationship between two components or parts (hereinafter collectively referred to as first part, second part), i.e. fluid (gas, liquid or mixture of the two) can flow or / and be transported from the first part to the second part along the flow path, which can be directly connected between the first part and the second part, or indirectly connected between the first part and the second part through at least one third party, which can be a fluid passage such as a pipe, channel, conduit, flow guide, hole, groove, etc., or a chamber allowing fluid flow or a combination thereof.

[0137] The movable nested range hood can be controlled by a voice module, which is installed with a controller, a voice receiving module, and a voice analysis module. The voice receiving module receives user instructions, and the voice analysis module analyzes the instructions. According to the analyzed instructions, the controller controls the movable nested range hood to perform corresponding operations, thereby realizing intelligent regulation and control of the movable nested range hood and improving user experience.

[0138] The technical features of the above-mentioned embodiments can be combined in any way. In order to make the description concise, all possible combinations of the technical features in the above-mentioned embodiments are not described, however, as long as the combination of the technical features does not exist contradictory, it should be considered as the scope of the present application.

[0139] The above-mentioned embodiments only express several embodiments of the present application, which are described in detail and specifically, but should not be understood as a limitation on the scope of the patent. It should be noted that for ordinary skilled in the art, without departing from the concept of the present application, a number of variations and improvements can be made, which are within the scope of the present application. Therefore, the scope of protection of the present application should be subject to the appended claims.

Claims

1. A movable nested range hood, comprising: a top cabinet (2); and a bottom cabinet connected below the top cabinet (2) for smoke inlet; characterized in that: a ventilation part is formed at the connection between the bottom cabinet and the top cabinet (2) to make the bottom cabinet and the top cabinet (2) in fluid communication; the bottom cabinet comprises a movable cabinet (11) and a fixed cabinet (12), the fixed cabinet (12) is at least partially embedded in the movable cabinet (11), and the top of the movable cabinet (11) is provided with a movable cabinet outlet (116) for smoke outlet to the top cabinet (2); the movable cabinet (11) can move relative to the fixed cabinet (12), when the movable nested range hood is in an open state, the top of the movable cabinet (11) is below the ventilation part, the movable cabinet outlet (116) is at least partially in front of the fixed cabinet (12), and the movable cabinet outlet (116) on the top of the movable cabinet (11) and the ventilation part form a channel for smoke to pass through, and the channel is at least partially in front of the fixed cabinet (12). There is a gap (S) between the top of the movable cabinet (11) and the ventilation part in the height direction of the movable nested range hood, the gap (S) is at least partially in front of the fixed cabinet (12), the movable cabinet outlet (116) on the top of the movable cabinet (11), the gap (S) and the ventilation part form a channel for smoke to pass through, and the fixed cabinet (12) is in direct fluid communication with the gap (S) through the flow channel formed at the connection with the top cabinet (2). The ventilation part comprises a fixed cabinet ventilation opening (21) and a movable cabinet ventilation opening (22) in front of the fixed cabinet ventilation opening (21), the two ventilation openings are in communication with each other, and in the horizontal plane projection, the fixed cabinet ventilation opening (21) corresponds to the fixed cabinet (12); when the movable nested range hood is in a closed state, the movable cabinet ventilation opening (22) is closed; when the movable nested range hood is in an open state, the movable cabinet ventilation opening (22) is opened, the movable cabinet (11) is below the movable cabinet ventilation opening (22), and the gap (S) exists between the top of the movable cabinet (11) and the movable cabinet ventilation opening (22). The movable nested range hood further comprises a flap (4), when the movable nested range hood is in a closed state, the flap (4) closes the movable cabinet ventilation opening (22), when the movable nested range hood is in an open state, the flap (4) opens the movable cabinet ventilation opening (22), and the flap (4) at least blocks the outer peripheral edge of the gap (S). The outer peripheral edge of the gap (S) comprises a first part (S1), which is the space between the front side edge of the movable cabinet outlet (116) and the top cabinet (2). ​ 2. The activity nested range hood according to claim 1, characterized in that: ​ 3. The activity nested range hood according to claim 2, wherein: ​ 4. The activity nested range hood according to claim 3, wherein: ​ 5. The activity nested range hood according to claim 4, wherein: ​ The opening and closing plate (4) includes a first plate body (41), when the movable nested range hood is in a closed state, the first plate body (41) is closed at the movable box vent (22), when the movable nested range hood is in an open state, the first plate body (41) opens the movable box vent (22), the opening and closing plate (4) blocks the first part (S1) through the first plate body (41); Or, the opening and closing plate (4) includes a first plate body (41) and a second plate body (42), the second plate body (42) is connected with the first plate body (41) and is arranged at an angle, and the second plate body (42) extends into the movable box body (11), when the movable nested range hood is in a closed state, the first plate body (41) is closed at the movable box vent (22), when the movable nested range hood is in an open state, the first plate body (41) opens the movable box vent (22), the opening and closing plate (4) blocks the first part (S1) through the first plate body (41), or the opening and closing plate (4) blocks the first part (S1) through the second plate body (42), or the opening and closing plate (4) blocks the first part (S1) through the transition position of the first plate body (41) and the second plate body (42).

6. The activity nested range hood according to claim 5, wherein: The outer periphery of the gap (S) includes a second part (S2), which is the space between the two side edges of the movable box outlet (116) in the width direction of the movable nested range hood and the top box (2) in the vertical direction; The opening and closing plate (4) further includes a third plate body (43), the third plate body (43) is arranged on the opposite sides of the first plate body (41) in the width direction of the movable nested range hood, when the movable nested range hood is in an open state, the third plate body (43) blocks the second part (S2).

7. The activity nested range hood according to claim 5, wherein: The opening and closing plate (4) further includes a fourth plate body (44), the fourth plate body (44) is connected with the first plate body (41) and arranged at an angle, when the movable nested range hood is in a closed state, the fourth plate body (44) is extended upward from the front end of the first plate body (41).

8. The activity nested range hood according to claim 4 or 5, characterized in that: The movable nested range hood further includes a movement mechanism, the movement mechanism includes a driving mechanism (61) and a driving arm (621) driven to rotate by the driving mechanism (61), the driving arm (621) is rotationally connected with the top box (2) and the rotation center is located on the top box (2), and the driving arm (621) is fixed with the opening and closing plate (4) and can drive the opening and closing plate (4) to rotate.

9. The activity nested range hood according to claim 8, wherein: The movement mechanism further includes a connecting rod (622), the connecting rod (622) is rotationally connected with the driving arm (621) and the movable box body (11) respectively.

10. The movable nested range hood according to claim 1, characterized in that: The movable box body (11) can rotate relative to the fixed box body (12) around the rotation axis extending in the width direction of the movable nested range hood; or, The movable box body (11) can translate relative to the fixed box body (12) in the depth direction of the movable nested range hood, and the venting part is inclined or stepped relative to the horizontal direction; or, The movable box (11) can be lifted relative to the fixed box (12), and the movable box outlet (116) of the movable box (11) is located at the front side of the fixed box (12).

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