Range hood and use method of range hood

Abstract

The invention relates to the technical field of kitchen appliances, and particularly discloses a range hood and a using method of the range hood, in the range hood, a shell is provided with a smoke collecting cavity, a front smoke inlet, side smoke inlets and a smoke outlet, the front smoke inlet, the side smoke inlets and the smoke outlet are communicated with the smoke collecting cavity, the front smoke inlet is formed in the front side of the shell, and the side smoke inlets are formed in at least one side of the shell in the length direction; the fan is arranged in the smoke collecting cavity; the translation piece is movably arranged on the shell in the thickness direction of the shell; a rotating shaft is arranged between the drainage plate and the translation piece, a rotating groove is formed in the other one, the rotating shaft extends in the height direction of the shell, the rotating shaft is rotationally arranged in the rotating groove, the drainage plate is arranged in the smoke collection cavity, and at least part of the drainage plate extends into the side smoke inlet; and the rotating shaft can synchronously move along with the translation piece and can rotate relative to the translation piece around the axis of the rotating shaft so as to adjust the flow of fluid entering the smoke collecting cavity from the side smoke inlet into the volute from the rear air inlet. The oil smoke suction efficiency is improved through the arrangement.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of kitchen appliances, in particular to an oil fume exhaust hood and a use method thereof. BACKGROUND

[0002] The ultra-thin oil fume exhaust hood (the thickness of the machine body is usually less than or equal to 250 mm) is installed at the rear of the cooking appliance. Its core advantage lies in saving space and improving aesthetics. However, in order to improve the smoke suction efficiency, the fan speed is usually increased. The fan generally includes a motor and an impeller connected to the output end of the motor. The high-speed fan requires the motor to maintain a high speed, which results in a high temperature of the motor, thereby affecting the performance of the motor and reducing the working efficiency of the fan. In addition, long-term cooking also causes the temperature of the motor to be high, which affects its performance. Furthermore, when using electric pressure cookers and other cooking utensils on the left and right sides of the ultra-thin oil fume exhaust hood, the front-side smoke inlet has poor suction effect on oil fumes, which affects the user's experience.

[0003] Therefore, it is urgent to study an oil fume exhaust hood and a use method thereof to solve the above problems. SUMMARY

[0004] The present application aims to provide an oil fume exhaust hood and a use method thereof to solve the problem that the high temperature of the motor in the prior art affects the efficiency of the fan, and the suction effect of oil fumes is poor when cooking utensils are used on the left and right sides of the oil fume exhaust hood.

[0005] To achieve the above-mentioned purpose, the present application adopts the following technical solutions:

[0006] An oil fume exhaust hood, comprising:

[0007] A housing having a smoke collecting cavity, a front smoke inlet, a side smoke inlet and a smoke outlet communicating with the smoke collecting cavity, the front smoke inlet being arranged on the front side of the housing, and the side smoke inlet being arranged on at least one side of the length direction of the housing;

[0008] A fan arranged in the smoke collecting cavity and located behind the front smoke inlet, the gas entering the volute of the fan from the front air inlet of the fan or the rear air inlet of the fan flows to the smoke outlet through the air outlet of the fan, wherein the motor of the fan is at least partially located behind the impeller;

[0009] A translation member movably arranged in the housing along the thickness direction of the housing;

[0010] A rotating shaft is arranged along the height direction of the shell, and a rotating groove is arranged on the other one, the rotating shaft is arranged in the rotating groove, the baffle is arranged in the smoke collecting cavity and extends into the side smoke inlet at least partially, and the baffle can move synchronously with the translation member and rotate relative to the translation member around the axis of the rotating shaft to adjust the flow rate of the fluid entering the volute from the rear air inlet.

[0011] As an optional technical solution of the range hood, the range hood further comprises a first driving member, the first driving member is arranged in the shell, an output end of the first driving member is connected with the translation member to drive the translation member to reciprocate along the thickness direction of the shell, or an output end of the first driving member is connected with the baffle to drive the baffle to move and drive the translation member to reciprocate along the thickness direction of the shell, and / or,

[0012] The baffle rotates between the first open state and the first closed state to open or close the side smoke inlet.

[0013] As an optional technical solution of the range hood, the rotating groove is arranged on the translation member, the rotating shaft is arranged on the baffle, and the first driving member comprises a telescopic driving member, the telescopic driving member is hinged to the shell, and an output end of the telescopic driving member is hinged to the rotating shaft.

[0014] As an optional technical solution of the range hood, the baffle is provided with one rotating shaft at each end along the height direction, the range hood comprises at least two translation members, the two translation members correspond to one baffle and are arranged at intervals along the height direction of the shell, and the two rotating shafts are connected with the two translation members one by one.

[0015] As an optional technical solution of the range hood, the baffle is further provided with an auxiliary shaft, the auxiliary shaft and the rotating shaft are arranged at intervals along the length direction of the baffle, the range hood further comprises a second driving member, the second driving member is connected to the shell, an output end of the second driving member is connected with the auxiliary shaft, and the second driving member drives the auxiliary shaft to drive the baffle to rotate around the rotating shaft.

[0016] As an optional technical solution of the range hood, the first driving member is located in the smoke collecting cavity, and / or,

[0017] The first driving member is located at the top of the shell.

[0018] As an optional technical solution of the range hood, the translation member is a sliding block, the shell is provided with a sliding rail extending along the thickness direction, and the sliding block is slidingly arranged in the sliding rail, and / or,

[0019] The rotating groove is arranged on the guide plate, and the rotating shaft is arranged on the translation member.

[0020] As an optional technical solution of the range hood, the shell has two side smoke inlets, which are respectively located on the two sides of the length direction of the shell and are respectively arranged on the two sides of the fan; the range hood comprises two guide plates, the two guide plates and the two side smoke inlets are one-to-one corresponding, and are respectively arranged on the two sides of the fan along the length direction of the shell; the translation member is at least provided with two, and each guide plate corresponds to at least one translation member.

[0021] As an optional technical solution of the range hood, the range hood further comprises a smoke guide plate, the smoke guide plate is arranged on the shell and can be switched between a second open state and a second closed state to open or close the front smoke inlet; and / or,

[0022] The shell comprises a main body part and a rear convex part, the length of the rear convex part is less than the length of the main body part, and the side smoke inlet is arranged on the main body part.

[0023] The use method of the range hood is applied to the range hood of any one of the above technical solutions, and comprises the following steps:

[0024] When a cooking utensil is used on the range in front of the range hood, it is judged whether the oil fume on one side of the range hood along the length direction exceeds a first preset concentration, if yes, the guide plate on the corresponding side is opened, part of the oil fume enters the smoke collecting chamber from the front smoke inlet and enters the volute from the front air inlet, and / or part of the oil fume enters the smoke collecting chamber from the side smoke inlet and enters the volute from the rear air inlet; otherwise, the guide plate remains in the first closed state, the oil fume enters the smoke collecting chamber from the front smoke inlet, and enters the volute from the front air inlet;

[0025] When a cooking utensil is used on one side of the range hood along the length direction, the guide plate is opened, and the oil fume can enter the smoke collecting chamber from the side smoke inlet.

[0026] The present application has at least the following beneficial effects:

[0027] The oil fume extractor comprises a housing, a fan, a translation member and a flow guide plate.

[0028] The arrangement of the front smoke inlet and the side smoke inlet increases the smoke inlet area, thereby improving the oil fume suction efficiency. In addition, the side smoke inlet is arranged to enable the gas to enter the smoke collection cavity from the side smoke inlet and enter the volute from the rear air inlet. In this process, the gas passes through the motor of the fan, thereby removing the heat generated by the motor and cooling the motor, so that the temperature of the motor is maintained within a preset range, thereby facilitating the guarantee of the efficiency of the fan. Finally, the angle and position of the flow guide plate are adjustable, which can increase or decrease the air volume entering the volute through the rear air inlet, adjust the cooling effect on the motor and help to adapt to different application scenarios.

[0029] Even if an electric pressure cooker or other cooking utensil is used beside the oil fume extractor on the cooking table, the oil fume or steam can be sucked through the side smoke inlet, thereby ensuring the suction effect and cooling the motor to guarantee the efficiency of the fan. BRIEF DESCRIPTION OF DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the description of the embodiments of the present application will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art according to the contents of the embodiments of the present application and the drawings without creative labor.

[0031] Figure 1 FIG. 1 is a structural schematic view of the oil fume extractor in the first perspective view according to an embodiment of the present application;

[0032] Figure 2 FIG. 2 is a structural schematic view of the oil fume extractor in the second perspective view according to an embodiment of the present application;

[0033] Figure 3 FIG. 3 is a structural schematic view of the oil fume extractor in the third perspective view according to an embodiment of the present application; Figure 2A cross-sectional view along the direction of A-A;

[0034] Figure 4 Fig. 1 is a schematic view of an internal structure of an extractor hood according to an embodiment of the present application, a first perspective view; Figure 3 Fig. 2 is an enlarged view of part J in Fig. 1;

[0035] Figure 5 Fig. 3 is a schematic view of an internal structure of an extractor hood according to an embodiment of the present application, a second perspective view;

[0036] Figure 6 Fig. 4 is a schematic view of an internal structure of an extractor hood according to an embodiment of the present application, a third perspective view;

[0037] Figure 7 Fig. 5 is an enlarged view of part K in Fig. 4. Figure 6 Fig. 6 is a schematic view of an internal structure of an extractor hood according to an embodiment of the present application, a fourth perspective view;

[0038]

[0039] 100, housing; 110, smoke collecting cavity; 120, front smoke inlet; 130, side smoke inlet; 140, smoke outlet; 101, main body; 102, rear protruding part; 103, baffle plate;

[0040] 200, fan; 210, volute; 211, front air inlet; 212, rear air inlet; 220, motor; 230, impeller; 240, mounting bracket;

[0041] 300, translation member; 310, slide rail;

[0042] 400, guide plate; 410, rotation shaft; 420, auxiliary shaft;

[0043] 510, first driving member; 520, second driving member;

[0044] 600, smoke guide plate; 610, second filter screen. DETAILED DESCRIPTION

[0045] Before any embodiments of the present application are explained in detail, it is to be understood that the application is not limited in its application to the details of construction and the arrangement of components set forth in the following description or illustrated in the above-described accompanying drawings.

[0046] In this application, the terms "comprise", "comprising", "having", "including", "contain", "containing", "include" or any other similar phrase are intended to encompass non-exclusive inclusion, such that processes, methods, articles, or apparatuses that comprise a list of elements are not limited to those elements, but can include other elements not expressly listed or inherent to such processes, methods, articles, or apparatuses. Without further limitation, an element defined by the phrase "comprising a" does not exclude the existence of additional identical elements in the process, method, article, or apparatus that includes the element.

[0047] ​In the present application, the term "and / or", is a description of an associated relationship with associated objects, which means that there can be three kinds of relationships. For example, A and / or B, can represent: the existence of A alone, the existence of A and B together, and the existence of B alone. In addition, the character " / " in the present application generally indicates that the front and rear associated objects are in a "and / or" relationship.

[0048] In the present application, the terms "connected", "combined", "coupled", "mounted" can be direct connection, combination, coupling or mounting, or indirect connection, combination, coupling or mounting. Among them, for example, direct connection refers to the connection of two parts or components without the need for an intermediate part, while indirect connection refers to the connection of two parts or components with at least one intermediate part. In addition, "connection" and "coupling" are not limited to physical or mechanical connection or coupling, and can include electrical connection or coupling.

[0049] In the present application, those of ordinary skill in the art will understand that the relative terms used in connection with quantities or conditions (for example, "about", "approximately", "substantially" and the like) include the values indicated by the context and have the meaning indicated by the context. For example, the relative terms at least include the degree of error related to the measurement of a specific value, the tolerance caused by manufacturing, assembly, use, etc. related to a specific value. Such terms should also be considered to disclose the range defined by the absolute values of the two endpoints. The relative term can refer to a certain percentage (e.g. 1%, 5%, 10% or more) of the indicated value. The numerical value without the relative term should also be disclosed as a specific value with a tolerance. In addition, "substantially" when expressing the relative angular positional relationship (for example, substantially parallel, substantially perpendicular), can refer to a certain number of degrees (e.g. 1 degree, 5 degrees, 10 degrees or more) added or subtracted from the indicated angle.

[0050] In the present application, those of ordinary skill in the art will understand that the functions performed by the components can be performed by one component, multiple components, one part, or multiple parts. Similarly, the functions performed by the parts can also be performed by one part, one component, or multiple parts in combination.

[0051] In the present application, the terms "upper", "lower", "left", "right", "front", "back" and the like are described in the orientation and positional relationship shown in the drawings, and should not be understood as a limitation on the embodiments of the present application. In addition, it is also understood in the context that when referring to an element connected to another element "on" or "under", it can be directly connected to another element "on" or "under", or indirectly connected to another element "on" or "under" through an intermediate element. It should also be understood that the terms "upper", "lower", "left", "right", "front", "back" and the like not only represent the positive direction, but also can be understood as the side direction. For example, the lower side can include the directly below, left below, right below, front below and back below, etc.

[0052] As shown in Figures 1 to 7 The present embodiment provides an extractor hood, which comprises a housing 100, a fan 200, a translation member 300 and a guide plate 400; wherein the housing 100 has a smoke collecting cavity 110, a front smoke inlet 120, a side smoke inlet 130 and a smoke outlet 140 which are in communication with the smoke collecting cavity 110, the front smoke inlet 120 is arranged on the front side of the housing 100, and the side smoke inlet 130 is arranged on at least one side of the length direction of the housing 100; the fan 200 is arranged in the smoke collecting cavity 110 and located behind the front smoke inlet 120, the gas entering the volute 210 of the fan 200 from the front air inlet 211 of the fan 200 or the rear air inlet 212 of the fan 200 flows to the smoke outlet 140 through the air outlet of the fan 200, wherein the fan 200 comprises a motor 220 and an impeller 230, at least part of the motor 220 is located behind the impeller 230; the translation member 300 is movably arranged in the housing 100 along the thickness direction of the housing 100; the guide plate 400 and the translation member 300 are arranged in a manner that one of them is provided with a rotating shaft 410 and the other is provided with a rotating groove, the rotating shaft 410 extends along the height direction of the housing 100, the rotating shaft 410 is rotatably arranged in the rotating groove, the guide plate 400 is arranged in the smoke collecting cavity 110 and extends at least partially into the side smoke inlet 130, and can move synchronously with the translation member 300 and rotate relative to the translation member 300 around the axis of the rotating shaft 410 to adjust the flow rate of the fluid entering the volute 210 from the rear air inlet 212.

[0053] Wherein, the length direction is the left-right direction, the thickness direction is the front-back direction, and the height direction is the up-down direction.

[0054] The arrangement of the front smoke inlet 120 and the side smoke inlet 130 increases the smoke inlet area, thereby improving the smoke suction efficiency. In addition, by opening the side smoke inlet 130, gas can enter the smoke collection cavity 110 from the side smoke inlet 130 and enter the volute 210 from the rear air inlet 212. In this process, the gas passes through the motor 220 of the fan 200, carries away the heat generated by the motor 220, and cools the motor 220, so that the temperature of the motor 220 is maintained within a predetermined range, thereby helping to ensure the efficiency of the fan 200. Finally, the angle and position of the flow guide plate 400 are adjustable, which can increase or decrease the amount of air entering the volute 210 through the rear air inlet 212, adjust the cooling effect on the motor 220, and help to adapt to different application scenarios.

[0055] Even if an electric pressure cooker or other cooking utensil is used beside the range hood on the cooking table, the side smoke inlet 130 can still suck oil fumes or steam, thereby ensuring the suction effect and cooling the motor 220 to ensure the efficiency of the fan 200.

[0056] In some embodiments, the range hood further comprises a first driving member 510, which is arranged in the housing 100. The output end of the first driving member 510 is connected to the translation member 300 to drive the translation member 300 to reciprocate along the thickness direction of the housing 100. Alternatively, the output end of the first driving member 510 is connected to the flow guide plate 400 to drive the flow guide plate 400 to move and drive the translation member 300 to reciprocate along the thickness direction of the housing 100. The above arrangement, on the one hand, realizes the automatic control of the translation member 300, avoids manual operation, ensures the hand cleaning of the user during use, and improves the user experience. On the other hand, the arrangement of the first driving member 510 can adjust the relative position of the flow guide plate 400 in the side smoke inlet 130, thereby adjusting the proportion of the front side space and the rear side space of the side smoke inlet 130 relative to the flow guide plate 400, and further adjusting the proportion of the smoke entering the smoke collection cavity 110 from the front side space and the rear side space of the side smoke inlet 130. On this basis, in combination with the rotation of the flow guide plate 400 relative to the translation member 300, the proportion of the smoke entering the volute 210 from the front air inlet 211 or the rear air inlet 212 can be adjusted. It should be noted that the flow guide plate 400 divides the side smoke inlet 130 into two parts, i.e., the front side space and the rear side space. The oil fumes entering the smoke collection cavity 110 from the front side space are more likely to enter the volute 210 from the front air inlet 211, and the oil fumes entering the smoke collection cavity 110 from the rear side space are more likely to enter the volute 210 from the rear air inlet 212, thereby realizing the cooling of the fan 200.

[0057] In use, the diversion plate 400 exists in the following states. In the first embodiment, the diversion plate 400 is in the first state, the translation member 300 is located at the front end of the side smoke inlet 130, the front space disappears, and all the oil fumes enter the smoke collection chamber 110 from the rear space. By rotating the diversion plate 400, it forms an inclined state, tilting backward from the outside towards the smoke collection chamber 110, diverting all the oil fumes to the rear air inlet 212. This is suitable for situations where one end of the range hood has oil fumes and the motor 220 has a high cooling requirement.

[0058] In the second embodiment, the guide plate 400 is in the second state, and the translation member 300 is located at the rear end of the side smoke inlet 130. The rear space disappears, and all the fumes enter the smoke collection chamber 110 from the front space. The guide plate 400 rotates to form an inclined state, tilting forward from the outside towards the smoke collection chamber 110, guiding all the fumes to the front air inlet 211. This is suitable for situations where one end of the range hood has fumes, but the motor 220 does not require cooling.

[0059] In the third embodiment, the diversion plate 400 is in the third state, the translation member 300 is located in the middle of the side smoke inlet 130, the rear space and the front space are the same, part of the oil fumes enter the smoke collection chamber 110 from the front space, and the other part enters the smoke collection chamber 110 from the rear space. This is suitable for situations where one end of the range hood has oil fumes and the cooling requirement of the motor 220 is low.

[0060] In some embodiments, the diversion plate 400 rotates between a first open state and a first closed state to open or close the side smoke inlet 130. This configuration allows the diversion plate 400 to close the side smoke inlet 130, resulting in a cleaner appearance. Specifically, in the first open state, the diversion plate 400 opens the side smoke inlet 130, with the diversion plate 400 extending in the left-right direction. The end of the diversion plate 400 away from the fan 200 moves forward, while the end of the diversion plate 400 near the fan 200 rotates to the rear of the side smoke inlet 130 to form the first closed state; alternatively, the end of the diversion plate 400 away from the fan 200 moves backward, while the end of the diversion plate 400 near the fan 200 rotates to the front of the side smoke inlet 130 to form the first closed state.

[0061] In some embodiments, a rotating groove is provided on the translation member 300, a rotating shaft 410 is provided on the diversion plate 400, and the first driving member 510 includes a telescopic driving member, which is hinged to the housing 100, and the output end of the telescopic driving member is hinged to the rotating shaft 410. The telescopic driving member is a push rod motor 220. This configuration helps to reduce the thickness of the diversion plate 400, save costs, and improve aesthetics.

[0062] The output shaft of the first driving member 510 is a bent structure to adapt to the internal structure of the smoke collecting cavity 110 and the relative position relationship between the first driving member 510 and the rotating shaft 410. In other embodiments, the first driving member 510 can also be a servo motor 220, the output end of the servo motor 220 is connected through a driving wheel, a driven wheel rotates and is arranged outside the shell 100, a belt is arranged outside the periphery of the driving wheel and the driven wheel, and a straight line portion extending in the front-rear direction in the belt is connected with the translation member 300.

[0063] To improve the smoothness of the movement of the translation member 300, in some embodiments, the translation member 300 is a sliding block, the shell 100 is provided with a sliding rail 310 extending in the thickness direction, and the sliding block is slidingly arranged in the sliding rail 310. The sliding block and the sliding rail 310 are matched through dovetail groove structure. The translation member 300 further includes a connecting block arranged beside the sliding block, the connecting block is provided with a first mounting hole, the rotating shaft 410 passes through the first mounting hole and is partially located above the first mounting hole, and the end of the rotating shaft 410 located above the first mounting hole is provided with a first clamping groove, and a first clamping ring is clamped in the first clamping groove. The outer diameter of the first clamping ring is greater than the diameter of the first mounting hole.

[0064] In other embodiments, the rotating groove is arranged on the drainage plate 400, and the rotating shaft 410 is arranged on the sliding block. The rotating shaft 410 is arranged on the end of the sliding block away from the sliding rail 310. In this embodiment, the drainage plate 400 includes a plate body and a support arm arranged on the inner side of the plate surface of the plate body. When the plate body closes the side smoke inlet 130, the plate body is located on the outer side of the sliding block to block the sliding block. The rotating groove is arranged on the end of the support arm away from the plate body, and the extension direction of the support arm is perpendicular to the height direction. In the projection on the horizontal plane, the maximum distance between the front end of the sliding block and the rotating shaft 410 is L1, and the length of the support arm is L2, L2 is greater than L1. The above arrangement makes the plate body not interfere with the sliding block during rotation around the rotating shaft 410, and blocks the sliding block when closing the side smoke inlet 130, thereby improving the aesthetics.

[0065] It should be noted that when the plate body closes the side smoke inlet 130, it is perpendicular to the left-right direction. At this time, the support arm extends along the left-right direction. It can be understood that when the plate body closes the side smoke inlet 130, it is generally perpendicular to the left-right direction.

[0066] To improve the smoothness of the movement of the translation member 300, in some embodiments, the translation member 300 is a sliding block, the shell 100 is provided with a sliding rail 310 extending in the thickness direction, and the sliding block is slidingly arranged in the sliding rail 310. The sliding block and the sliding rail 310 are matched through dovetail groove structure. The translation member 300 further includes a connecting block arranged beside the sliding block, the connecting block is provided with a first mounting hole, the rotating shaft 410 passes through the first mounting hole and is partially located above the first mounting hole, and the end of the rotating shaft 410 located above the first mounting hole is provided with a first clamping groove, and a first clamping ring is clamped in the first clamping groove. The outer diameter of the first clamping ring is greater than the diameter of the first mounting hole.

[0067] To enable the diversion plate 400 to rotate around the rotation shaft 410, in some embodiments, the diversion plate 400 is further provided with an auxiliary shaft 420. The auxiliary shaft 420 and the rotation shaft 410 are arranged at intervals along the length of the diversion plate 400. The range hood also includes a second driving member 520, which is connected to the housing 100 and has its output end connected to the auxiliary shaft 420, driving the auxiliary shaft 420 to rotate the diversion plate 400 around the rotation shaft 410. This configuration allows the second driving member 520 to be a push rod motor 220, thereby simplifying the assembly process. Since the auxiliary shaft 420 is far from the rotation shaft 410, its lever arm is large, and the power of the second driving member 520 is small, saving costs.

[0068] For example, the diversion plate 400 is provided with an auxiliary shaft 420 and two rotating shafts 410. The auxiliary shaft 420 and the rotating shafts 410 are located at the left and right ends of the diversion plate 400, respectively. The two rotating shafts 410 are located at the upper and lower ends of the diversion plate 400, respectively. The auxiliary shaft 420 is located at the upper or lower end of the diversion plate 400. The above orientation refers to the relative position of the diversion plate 400 in the first open state. When the auxiliary shaft 420 is located at the upper end of the diversion plate 400, the second driving member 520 is located inside the smoke collection chamber 110 and fixed to the top of the outer casing 100. The upper end of the auxiliary shaft 420 is provided with a second slot, and the output end of the second driving member 520 is provided with a second mounting hole. The auxiliary shaft 420 passes through the second mounting hole, and the second retainer is engaged with the second slot and located above the second mounting hole. The outer diameter of the second retainer is larger than the diameter of the second mounting hole.

[0069] The auxiliary shaft 420 is located at the lower end of the guide plate 400. The second driving component 520 is located inside the smoke collection chamber 110 and fixed to the bottom of the outer casing 100 to avoid interference between the two driving components, improve the convenience of movement, and reduce design difficulty.

[0070] The airflow guide plate 400 is plate-shaped, with a shorter dimension along the width direction of the outer shell 100 and a longer dimension along the height direction when perpendicular to the front-back direction. The airflow guide plate 400 has a curved plate-shaped structure to guide airflow while reducing noise.

[0071] In some embodiments, the first driving member 510 is located within the smoke collection chamber 110. In some embodiments, the first driving member 510 is located on top of the housing 100. In some embodiments, the first driving member 510 is located within the smoke collection chamber 110 and on top of the housing 100. This arrangement, on the one hand, protects the first driving member 510, and on the other hand, reduces the possibility of oil stains settling and covering the first driving member 510, thus ensuring performance.

[0072] Similarly, the second driving member 520 is located inside the smoke collecting cavity 110 and is fixed to the top of the housing 100.

[0073] In use, the user can use an electric pressure cooker or the like on the left side of the range hood, or can use an electric pressure cooker or the like on the right side of the range hood. The housing 100 has two side smoke inlets 130, which are respectively located on the two sides of the length direction of the housing 100 and are respectively arranged on the two sides of the fan 200. The range hood includes two guide plates 400, which are respectively arranged on the two sides of the fan 200 along the length direction of the housing 100 and correspond to the two side smoke inlets 130. The translation member 300 is provided at least twice, and each guide plate 400 corresponds to at least one translation member 300.

[0074] In order to prevent the oil fume on the left side of the range hood from escaping, the range hood further includes a smoke guide plate 600, which is arranged on the housing 100 and can be switched between a second open state and a second closed state to open or close the front smoke inlet 120.

[0075] In some embodiments, the housing 100 includes a main body portion 101 and a rear protruding portion 102, the length of the rear protruding portion 102 is less than the length of the main body portion 101, and the side smoke inlet 130 is arranged on the main body portion 101. In use, the rear protruding portion 102 is embedded in the mounting groove of the wall surface to reduce the visual thickness and improve the aesthetics of the entire range hood. At the same time, the length of the rear protruding portion 102 is relatively small, which facilitates the placement in the mounting groove and facilitates the blocking of the slot opening of the mounting groove by the main body portion 101.

[0076] The main body portion 101 is arranged with a blocking plate 103 near the rear end of the rear protruding portion 102, which is attached to the wall surface to improve the limiting effect and aesthetics. The blocking plate 103 includes two vertical portions and a horizontal portion, the two vertical portions are located at the two ends of the main body portion 101 along the length direction, and the horizontal portion is located at the lower end of the main body portion 101.

[0077] The mounting bracket 240 is connected to the housing 100, the fan 200 is fixed to the mounting bracket 240, and the oil fume can enter the rear air inlet 212 through the gap between the housing 100 and the fan 200. The fan 200 further includes a first filter screen, and the rear air inlet 212 is provided with the first filter screen. In other embodiments, the front smoke inlet 120 is provided with a second filter screen 610.

[0078] The embodiment also provides a use method of the range hood, which is applied to the range hood in any of the above embodiments. The use method of the range hood includes the following steps:

[0079] When the cookware is used on the cooktop in front of the range hood, it is determined whether the oil fume on one side of the range hood in the length direction exceeds the first preset concentration, if yes, the corresponding side of the guide plate 400 is opened, part of the oil fume enters the smoke collecting chamber 110 from the front smoke inlet 120 and enters the volute 210 from the front air inlet 211, and / or part of the oil fume enters the smoke collecting chamber 110 from the side smoke inlet 130 and enters the volute 210 from the rear air inlet 212; otherwise, the guide plate 400 remains in the first closed state, and the oil fume enters the smoke collecting chamber 110 from the front smoke inlet 120 and enters the volute 210 from the front air inlet 211.

[0080] When the cookware is used on one side of the range hood in the length direction, the guide plate 400 is opened, and the oil fume can enter the smoke collecting chamber 110 from the side smoke inlet 130. Among them, when the cookware is used on one side of the range hood in the length direction, the smoke guide plate 600 can not be opened.

[0081] The above method can cope with different application scenarios, and the arrangement of the front smoke inlet 120 and the side smoke inlet 130 increases the smoke inlet area, thereby improving the oil fume suction efficiency.

[0082] In addition, by opening the side smoke inlet 130, the gas can enter the smoke collecting chamber 110 from the side smoke inlet 130 and enter the volute 210 from the rear air inlet 212. In this process, the gas passes through the motor 220 of the fan 200 and carries away the heat generated by the motor 220, thereby dissipating heat for the motor 220 and keeping the temperature within a preset range, thereby facilitating the protection of the efficiency of the fan 200; finally, the guide plate 400 which can be translated and rotated can increase or decrease the air volume entering the volute 210 through the rear air inlet 212, adjust the cooling effect on the motor 220, and help to adapt to different application scenarios.

[0083] Specifically, when the cookware is used on the cooktop in front of the housing 100, the oil fume amount exceeds the preset value, a small amount of oil fume will escape to the side, and the guide plate 400 is in the first state, the second state or the third state, so that the oil fume enters the smoke collecting chamber 110 from the front side space of the side smoke inlet 130, thereby increasing the suction efficiency of the oil fume.

[0084] When cooking appliances such as electric pressure cookers are used next to the range hood on the stove, and the oil fume concentration exceeds the first preset concentration but is less than the second preset concentration, while the operating time of the range hood is less than the first preset time, the guide plate 400 is in either the second or third state; the second state is preferred to reduce contamination to the motor 220. When the oil fume concentration exceeds the first preset concentration but is less than the second preset concentration, and the operating time exceeds the first preset time, the guide plate 400 is adjusted to the third or first state to increase the flow rate of oil fumes from the side smoke inlet 130 into the smoke collection chamber 110; in addition, after entering the smoke collection chamber 110, the oil fumes are guided by the guide plate 400 to enter the volute 210 from the rear air inlet 212, which can cool the motor 220 and ensure the efficiency of the fan 200.

[0085] When cooking appliances such as electric pressure cookers are used next to the range hood on the stove, and the oil fume concentration exceeds the second preset concentration, the speed of motor 220 needs to be adjusted to a larger value. The guide plate 400 is adjusted to the first or third state so that the side smoke inlet 130 can draw in oil fumes or steam, thereby ensuring the suction effect. Oil fumes enter the smoke collection chamber 110 from the side smoke inlet 130, and some of them enter the volute 210 from the rear air inlet 212 under the guidance of the guide plate 400, which can cool down the motor 220 and ensure the efficiency of the fan 200.

[0086] When the cooking time in front of the range hood exceeds the second preset time, or when the cooking time in front of the range hood exceeds the preset speed, the airflow deflector 400 is adjusted to the first or third state. Furthermore, the angle of the airflow deflector 400 is adjusted to regulate the airflow rate entering the volute 210 from the rear air inlet 212, thereby maintaining the temperature of the motor 220 within a preset range.

[0087] The first preset time is less than the second preset time.

[0088] It should be noted that the cooking time can be detected by a time sensor on the stove or by a smoke concentration sensor. The oil fume concentration can be detected by a smoke concentration sensor. The detection of each judgment standard can also be achieved by other means in the prior art, which is not the focus of this application, so it will not be described in detail here.

[0089] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art will be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A range hood characterized by, The oil smoke exhaust device comprises: a housing (100) having a smoke collecting cavity (110) and a front smoke inlet (120), a side smoke inlet (130) and a smoke outlet (140) communicating with the smoke collecting cavity (110), the front smoke inlet (120) being arranged on the front side of the housing (100), and the side smoke inlet (130) being arranged on at least one side of the length direction of the housing (100); a fan (200) arranged in the smoke collecting cavity (110) and located behind the front smoke inlet (120), gas entering the volute (210) of the fan (200) from the front air inlet (211) of the fan (200) or the rear air inlet (212) of the fan (200) flowing to the smoke outlet (140) through the air outlet of the fan (200), wherein the motor (220) of the fan (200) is at least partially located behind the impeller (230); a translation member (300) movably arranged in the housing (100) along the thickness direction of the housing (100); a guide plate (400) and the translation member (300) are arranged with a rotating shaft (410) and a rotating groove, respectively, the rotating shaft (410) extends along the height direction of the housing (100), the rotating shaft (410) is rotatably arranged in the rotating groove, the guide plate (400) is arranged in the smoke collecting cavity (110) and at least partially extends into the side smoke inlet (130), and can move synchronously with the translation member (300) and rotate relative to the translation member (300) around the axis of the rotating shaft (410) to adjust the flow rate of the fluid entering the volute (210) from the rear air inlet (212) from the side smoke inlet (130) into the smoke collecting cavity (110).

2. The range hood according to claim 1, characterized in that The oil smoke exhaust device further comprises a first driving member (510) arranged in the housing (100), an output end of the first driving member (510) being connected with the translation member (300) to drive the translation member (300) to reciprocally move along the thickness direction of the housing (100); or the output end of the first driving member (510) being connected with the guide plate (400) to drive the guide plate (400) to move and drive the translation member (300) to reciprocally move along the thickness direction of the housing (100); and / or the guide plate (400) rotates between a first open state and a first closed state to open or close the side smoke inlet (130).

3. The range hood according to claim 2, wherein, The rotating groove is arranged in the translation member (300), the rotating shaft (410) is arranged in the guide plate (400), and the first driving member (510) comprises a telescopic driving member hinged to the housing (100) and hinged to the rotating shaft (410) at the output end.

4. The range hood according to claim 3, characterized in that The drainage plate (400) is provided with one rotating shaft (410) at each end in the height direction, the range hood comprises at least two translation members (300), wherein two translation members (300) correspond to one drainage plate (400) and are arranged at intervals in the height direction of the shell (100), and two rotating shafts (410) are connected to two translation members (300) one by one.

5. The range hood according to claim 2, wherein The drainage plate (400) is also provided with an auxiliary shaft (420), the auxiliary shaft (420) and the rotating shaft (410) are arranged at intervals in the length direction of the drainage plate (400), and the range hood further comprises a second driving member (520), the second driving member (520) is connected to the shell (100), and the output end is connected to the auxiliary shaft (420) and drives the auxiliary shaft (420) to drive the drainage plate (400) to rotate around the rotating shaft (410).

6. The range hood according to claim 2, wherein The first driving member (510) is located in the smoke collecting cavity (110); and / or, The first driving member (510) is located at the top of the shell (100).

7. The range hood according to claim 1, wherein The translation member (300) is a sliding block, the shell (100) is provided with a sliding rail (310) extending in the thickness direction, and the sliding block is slidingly arranged on the sliding rail (310); and / or, The rotating groove is arranged on the drainage plate (400), and the rotating shaft (410) is arranged on the translation member (300).

8. The range hood according to any one of claims 1-7, characterized in that The shell (100) has two side smoke inlets (130), the two side smoke inlets (130) are respectively located on the two sides of the shell (100) in the length direction and are arranged on the two sides of the fan (200), the range hood comprises two drainage plates (400), the two drainage plates (400) and the two side smoke inlets correspond to each other and are arranged on the two sides of the fan (200) in the length direction of the shell (100), and the translation member (300) is provided with at least two, and each drainage plate (400) corresponds to at least one translation member (300).

9. The range hood according to any one of claims 1-7, characterized in that The range hood further comprises a smoke guide plate (600), the smoke guide plate (600) is arranged on the shell (100) and can be switched between a second open state and a second closed state to open or close the front smoke inlet (120); and / or, The shell (100) comprises a main body portion (101) and a rear convex portion (102), the length of the rear convex portion (102) is less than the length of the main body portion (101), and the side smoke inlet (130) is arranged on the main body portion (101).

10. A method of using a range hood, applied to the range hood according to any one of claims 1 to 9, characterized in that, The method comprises the following steps: The method comprises the following steps: When a cooking utensil is used on the stove in front of the range hood, it is determined whether the oil fume on one side of the range hood in the length direction exceeds the first preset concentration, if yes, the corresponding side of the flow guide plate (400) is opened, part of the oil fume enters the smoke collecting chamber (110) from the front smoke inlet (120) and enters the volute (210) from the front air inlet (211), and / or part of the oil fume enters the smoke collecting chamber (110) from the side smoke inlet (130) and enters the volute (210) from the rear air inlet (212); otherwise, the flow guide plate (400) remains in the first closed state, the oil fume enters the smoke collecting chamber (110) from the front smoke inlet (120), and enters the volute (210) from the front air inlet (211); When a cooking utensil is used on one side of the range hood in the length direction, the flow guide plate (400) is opened, and the oil fume can enter the smoke collecting chamber (110) from the side smoke inlet (130).

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