Range hood and range hood control method

Abstract

The application relates to the technical field of kitchen appliances, and particularly discloses a range hood and a range hood control method. In the range hood, a shell has a smoke collecting cavity, a front smoke inlet, a side smoke inlet and a smoke outlet; a fan is arranged in the smoke collecting cavity and located at the rear of the front smoke inlet; oil fume entering a volute of the fan from a front air inlet of the fan or a rear air inlet of the fan flows to the smoke outlet through an air outlet of the fan; at least two cover plates are arranged side by side along the thickness direction of the shell and block the side smoke inlet when all the cover plates are closed; the cover plates are rotationally arranged on the shell, and the rotation axes extend along the height direction of the shell; when the cover plates are opened, the side smoke inlet, the smoke collecting cavity and the rear air inlet are communicated; a driving mechanism has at least two output shafts, the at least two output shafts are respectively hinged to the two cover plates, and the at least two output shafts can act in sequence to drive the front cover plate to open first and then drive the rear cover plate to open. The above arrangement improves the oil fume suction efficiency, guarantees the fan efficiency and is low in cost.

Description

Technical Field

[0001] This invention relates to the field of kitchen appliance technology, and in particular to a range hood and a range hood control method. Background Technology

[0002] Ultra-thin range hoods (with a body thickness typically ≤250mm) are installed behind the cooktop. Their core advantages are space saving and improved aesthetics. However, to improve smoke extraction efficiency, the fan speed is usually increased. A fan generally consists of a motor and an impeller connected to the motor's output. High-speed fans require the motor to maintain a high rotation speed, leading to higher motor temperatures, which in turn affects motor performance and reduces fan efficiency. Additionally, to prevent smoke escape, a smoke guide plate is usually installed above the front smoke inlet. When opened, the smoke guide plate tilts forward and downward to guide the smoke smoothly into the smoke inlet. This design limits the use of tall cookware. Furthermore, when using electric pressure cookers or other cooking appliances on the left or right sides of an ultra-thin range hood, the extraction effect is poor, impacting the user experience.

[0003] Therefore, it is urgent to study a range hood and a range hood control method to solve the above problems. Summary of the Invention

[0004] The purpose of this invention is to provide a method for controlling oil fumes and range hoods, in order to solve the problems in the prior art where the high temperature of the motor affects the efficiency of the fan, the setting of the smoke guide plate restricts the use of tall cookware, and the oil fume extraction effect is poor when cooking utensils are used on the left and right sides of the range hood.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] Range hoods include:

[0007] The outer casing has a smoke collection chamber and a front smoke inlet, a side smoke inlet and a smoke outlet communicating with the smoke collection chamber. The front smoke inlet is located on the front side of the outer casing, and the side smoke inlet is located on at least one side of the outer casing along its length.

[0008] A fan is disposed in the smoke collection chamber and located behind the inlet. Gas entering the volute of the fan from the front inlet or the rear inlet of the fan flows to the outlet through the outlet of the fan. The motor of the fan is located at least partially behind the impeller.

[0009] The cover plates are arranged in parallel along the thickness direction of the shell, and the side smoke inlet is blocked when all the cover plates are closed. The cover plates are arranged in the shell and the rotation axis extends along the height direction of the shell. The front smoke inlet, the smoke collecting cavity and the front air inlet are communicated, and the side smoke inlet, the smoke collecting cavity and the rear air inlet are communicated when the cover plates are opened.

[0010] The driving mechanism has at least two output shafts, and the output shafts are respectively hinged to the two cover plates. The output shafts can act in sequence to drive the front cover plate to open first and then drive the rear cover plate to open.

[0011] As an optional technical solution of the range hood, at least the cover plate located at the most front side is in an inclined state when opened, and is inclined backward from the outside to the smoke collecting cavity to guide the smoke entering from the side smoke inlet to flow to the rear side of the smoke collecting cavity to enter the volute of the fan from the rear air inlet of the fan.

[0012] As an optional technical solution of the range hood, the cover plate comprises a cover body and a rotating part arranged on the cover body and matched with the shell. When the cover plate is closed, the rotating part is located at the rear side of the cover body. The cover plate is rotated outward to open the side smoke inlet.

[0013] As an optional technical solution of the range hood, along the height direction of the shell, one rotating shaft is arranged at each of the upper and lower ends of the cover body to form the rotating part. The shell is provided with two open rotating grooves opposite to each other, and the rotating shaft is arranged in the rotating groove.

[0014] As an optional technical solution of the range hood, the driving mechanism further comprises a driving member and a moving member. The driving member is arranged in the shell, the moving member is movably arranged in the shell along the thickness direction of the shell, and is in transmission connection with the output end of the driving member. The two output shafts are movably arranged in the shell along the length direction of the shell. Each output shaft has a matching part. The moving member is provided with at least two guide parts, and the guide parts are in sliding connection with the matching parts.

[0015] As an optional technical solution of the range hood, the moving member is provided with a first sliding groove to form a guide part. One end of the output shaft is provided with a sliding block to form the matching part. The sliding block is slidably arranged in the first sliding groove. The moving member can drive the sliding block to move to open the cover plate during forward movement.

[0016] One of the first sliding grooves comprises a first initial segment, a first driving segment and a first termination segment connected in sequence. The first initial segment and the first termination segment are parallel, and the first driving segment is arranged in an inclined manner.

[0017] Another first chute comprises a second initial section, a second driving section and a second terminal section which are connected in sequence, the second initial section and the second terminal section are parallel, the second driving section is arranged obliquely, and the second driving section is located at the rear side of the first driving section.

[0018] As an optional technical scheme of the range hood, both the first chutes are T-shaped slots with openings facing the output shafts, the slider is spherical, and the moving piece can drive the slider to move to close the cover plate during the backward movement.

[0019] As an optional technical scheme of the range hood, the driving mechanism further comprises a sliding base provided with a sliding channel, the output shaft comprises a sliding rod and a hinged rod, the sliding rod is slidably arranged in the sliding channel, the slider is arranged at one end of the sliding rod, one end of the hinged rod is hinged to the other end of the sliding rod, and the other end of the hinged rod is hinged to the cover plate.

[0020] As an optional technical scheme of the range hood, two side smoke inlets communicating with the smoke collecting cavity are arranged on the two sides of the length direction of the shell respectively; each side smoke inlet corresponds to at least two cover plates, and two side smoke inlets can be opened simultaneously or only one of them can be opened.

[0021] As an optional technical scheme of the range hood, the two front cover plates corresponding to the two side smoke inlets are opened or closed synchronously; and / or,

[0022] The two rear cover plates corresponding to the two side smoke inlets are opened or closed synchronously.

[0023] As an optional technical scheme of the range hood, the driving mechanism further comprises a driving piece and two moving pieces, the driving piece is arranged in the shell, the two moving pieces are movably arranged in the shell along the thickness direction of the shell, and are in transmission connection with the output end of the driving piece, at least four output shafts are hinged to four cover plates respectively, the output shafts are movably arranged in the shell along the length direction of the shell, each output shaft has a matching part, and each moving piece is provided with at least two guide parts to be slidably matched with at least two matching parts respectively.

[0024] As an optional technical scheme of the range hood, one of the two moving pieces is directly connected with the driving piece, the driving mechanism further comprises a transfer piece connected between the two moving pieces, so that one of the moving pieces can drive the other moving piece to move synchronously.

[0025] As an optional technical scheme of the range hood, the driving mechanism is arranged in the shell and located at the top of the smoke collecting cavity.

[0026] As an optional technical scheme of the range hood, the range hood further comprises a front smoke guiding plate movably arranged in the shell to open or close the front smoke inlet; and / or,

[0027] The range hood further comprises a first filter screen arranged in the front smoke inlet.

[0028] The range hood control method is applied to the range hood of any of the above technical schemes and comprises the following steps.

[0029] It is judged whether the height of the pot is higher than a preset height, and if yes, the cover plate is opened so that the oil fume can enter the smoke collecting cavity from the side smoke inlet; otherwise, it is further judged whether there is oil fume along the length direction of the range hood, and if yes, the cover plate is opened, and otherwise, the cover plate is kept closed and only the front smoke inlet is used to suck the oil fume.

[0030] The range hood and the range hood control method have at least the following beneficial effects:

[0031] The range hood and the range hood control method have at least the following beneficial effects:

[0032] 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, through the arrangement of the side smoke inlet, the gas on one side of the length direction of the shell enters the smoke collecting cavity through the side smoke inlet, thereby entering the volute at the rear inlet of the fan. In this process, the gas passes through the motor of the fan and carries away the heat generated by the motor, thereby dissipating heat for the motor and keeping the temperature of the motor within a preset range, thereby being beneficial to ensuring the efficiency of the fan.

[0033] Taller cookware is generally steamer, which produces steam and less oil fumes. By opening the lid, steam can enter the smoke collection chamber from the side smoke inlet, thus meeting the needs of taller cookware and improving the user experience.

[0034] Finally, even when using cooking appliances such as electric pressure cookers next to the range hood on the stove, the fumes or steam can still be drawn in through the side smoke inlet, thus ensuring the suction effect and cooling the motor to ensure the efficiency of the fan.

[0035] By using a single drive mechanism to simultaneously drive two covers, costs are saved. The front and rear covers open sequentially, allowing for the extraction of less oil fume after the front cover is opened, while also providing heat dissipation for the motor. When both covers are open, more oil fume can be extracted, and the motor can be cooled even better, making it suitable for a wider range of applications. Attached Figure Description

[0036] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of the present invention and these drawings without creative effort.

[0037] Figure 1 This is a schematic diagram of the range hood in an embodiment of the present invention, with both covers open;

[0038] Figure 2 This is a cross-sectional structural diagram of the range hood in an embodiment of the present invention;

[0039] Figure 3 This is a schematic diagram of the connection structure between the drive mechanism and the cover plate of the range hood in an embodiment of the present invention;

[0040] Figure 4 This is a cross-sectional structural diagram of the drive mechanism and the cover plate in an embodiment of the present invention;

[0041] Figure 5 for Figure 4 A magnified view of a section at point A in the middle;

[0042] Figure 6 This is a schematic diagram of the structure of the range hood in an embodiment of the present invention, showing that the front cover is open and the rear cover is closed;

[0043] Figure 7 This is a schematic diagram of the range hood in an embodiment of the present invention, with both covers closed;

[0044] Figure 8 This is a schematic diagram of the range hood in an embodiment of the present invention, with the front guide plate omitted.

[0045] In the drawings:

[0046] 100, housing; 110, smoke collecting cavity; 120, front smoke inlet; 130, side smoke inlet; 140, smoke outlet;

[0047] 200, fan; 210, volute; 220, motor; 230, impeller; 240, mounting frame;

[0048] 300, cover plate; 310, cover body; 320, rotating shaft;

[0049] 400, driving mechanism; 410, output shaft; 411, sliding rod; 4111, sliding block; 412, hinged rod; 420, driving piece; 430, moving piece; 431, first initial segment; 432, first driving segment; 433, first terminal segment; 434, second initial segment; 435, second driving segment; 436, second terminal segment; 440, sliding base; 450, transfer piece;

[0050] 500, front smoke guide plate; 510, first filter screen. DETAILED DESCRIPTION

[0051] Before any embodiments of the 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.

[0052] In this application, the terms "comprise", "comprising", "including", "including", "have", "having", or any other variant thereof are intended to cover non-exclusive inclusions, so that processes, methods, articles or devices that include a series of elements not only include those elements, but also include other elements not explicitly listed, or inherent to such processes, methods, articles or devices. Without more limitations, the element defined by the statement "comprising a" does not exclude the presence of other identical elements in the process, method, article or device that includes the element.

[0053] In this application, the term "and / or", is a description of the association relationship between the associated objects, which means that there can be three kinds of relationships. For example, A and / or B, which means that there are three cases of A alone, A and B together, and B alone. In addition, the character " / " in this application generally represents that the front and rear associated objects are a "and / or" relationship.

[0054] In this application, the terms "connect," "couple," "coupled," "mount," and "mounting" can be direct or indirect, and can include mechanical, electrical, and / or logical connections, among others.

[0055] In this application, those of ordinary skill in the art will appreciate that the use of relative terms (e.g., "about," "approximately," "substantially," etc.) in connection with a quantity or condition will be understood to include the stated value and possess the meaning indicated by the context. For example, the relative terms will at least include the degree of error associated with measurement of the particular quantity based upon the equipment used and the manner in which the measurement is made. Such terms should also be considered as disclosing a range that is the absolute value of the two endpoints. The relative terms can refer to a percentage (e.g., 1%, 5%, 10% or more) of the indicated value plus or minus. Values that are not preceded by relative terms should also be disclosed as being of a particular value with a tolerance. In addition, "substantially" when used in expressing a relative angular positional relationship (e.g., substantially parallel, substantially perpendicular) can refer to plus or minus a certain number of degrees (e.g., 1 degree, 5 degrees, 10 degrees or more) from the indicated angle.

[0056] In this application, those of ordinary skill in the art will appreciate that a function performed by a component can be performed by one component, multiple components, one part, or multiple parts. Similarly, a function performed by a part can be performed by one part, one component, or multiple parts in combination.

[0057] In this application, the terms "upper," "lower," "left," "right," "front," "back," and the like refer to the orientation and position as shown in the drawings, and should not be interpreted as limiting the embodiments of the present application. In addition, it will be understood that, when referring to one element being "on" or "under" another element, it can be directly on or under the other element, or indirectly connected by an intervening element. It will also be understood that the terms "upper," "lower," "left," "right," "front," "back," and the like refer not only to the positive directions, but also to the side directions. For example, "under" can include directly under, left under, right under, front under, and back under, among others.

[0058] As Figures 1 to 8As shown, the embodiment provides an oil fume extractor, which comprises a housing 100, a fan 200, a cover plate 300 and a driving mechanism 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 communicated with the smoke collecting cavity 110, the front smoke inlet 120 is arranged at the front side of the housing 100, and the side smoke inlet 130 is arranged at 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 oil fume entering the volute 210 of the fan 200 from the front air inlet of the fan 200 or the rear air inlet of the fan 200 flows 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; at least two cover plates 300 are arranged side by side along the thickness direction of the housing 100 and block the side smoke inlet 130 when all the cover plates 300 are closed, the cover plate 300 is rotationally arranged on the housing 100 and the rotation axis extends along the height direction of the housing 100, and the side smoke inlet 130, the smoke collecting cavity 110 and the rear air inlet are communicated when the cover plate 300 is opened; the driving mechanism 400 has at least two output shafts 410, the at least two output shafts 410 are respectively hinged with the two cover plates 300, and the at least two output shafts 410 can act in sequence to drive the front cover plate 300 to open first and then drive the rear cover plate 300 to open.

[0059] Wherein, the thickness direction is the front-rear direction, the length direction is the left-right direction, and the height direction is the up-down direction.

[0060] 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. In addition, through the arrangement of the side smoke inlet 130, the gas at one side of the length direction of the housing 100 enters the smoke collecting cavity 110 through the side smoke inlet 130, thereby entering the volute 210 at the rear air inlet of the fan 200, and in this process, the gas passes through the motor 220 of the fan 200 to cool the motor 220, thereby being conducive to ensuring the efficiency of the fan 200.

[0061] The pot with a relatively high height is generally a steamer, which generates steam and has less oil fume, and the steam can enter the smoke collecting cavity 110 from the side smoke inlet 130 by opening the cover plate 300, thereby meeting the use demand of the high pot and improving the user experience.

[0062] Finally, even if the electric pressure cooker and other cookers are used beside the oil fume extractor on the cooking bench, the oil fume or steam can be sucked through the side smoke inlet 130, thereby ensuring the suction effect and cooling the motor 220 to ensure the efficiency of the fan 200.

[0063] The two cover plates 300 are simultaneously driven by a driving mechanism 400, thereby saving cost, and the front and rear cover plates 300 are opened in sequence, so that when the front cover plate 300 is opened, less oil fume can be sucked, and the motor 220 can be cooled; when the two cover plates 300 are opened, more oil fume can be sucked, and the motor 220 can be better cooled, thereby adapting to more application scenarios.

[0064] In the figure, the dashed arrow represents the flow direction of the gas. The smoke outlet 140 is arranged at the top of the shell 100.

[0065] At least the frontmost cover plate 300 among all the cover plates 300 is in an inclined state when it is opened, and is inclined backward from the outside to the direction of the smoke collecting cavity 110 to guide the smoke gas entering from the side smoke inlet 130 to flow to the rear side of the smoke collecting cavity 110 to enter the volute 210 of the fan 200 from the rear air inlet of the fan 200, so that when the rear cover plate 300 is opened, the gas entering from the side smoke inlet 130 will move backward under the action of the frontmost cover plate 300, and finally enter the volute 210 from the rear air inlet. Among them, the included angle between the left cover plate 300 and the left side wall of the shell 100 is less than 90° when the left cover plate 300 is opened.

[0066] In some embodiments, the rear cover plate 300 is parallel to the rear wall of the shell 100 when all the rear cover plates 300 are opened, so that the two cover plates 300 form a flared structure, which on the one hand improves the air intake, and on the other hand, due to the inclined arrangement of the front cover plate 300, the gas flowing into the smoke collecting cavity 110 is inclined backward, which drives the gas entering the smoke collecting cavity 110 from between the two cover plates 300 to be inclined backward and finally enter the rear air inlet.

[0067] In some embodiments, the cover plate 300 comprises a cover body 310 and a rotating part arranged on the cover body 310 and matched with the shell 100, when the cover plate 300 is closed, the rotating part is located at the rear side of the cover body 310, and the cover plate 300 is rotated outward to open the side smoke inlet 130. The above structure is simple, and facilitates the production and installation of the cover plate 300; when the cover plate 300 is opened, the external gas can be guided to flow backward after entering the smoke collecting cavity 110.

[0068] Specifically, along the height direction of the shell 100, the cover body 310 is provided with a rotating shaft 320 at each of the upper and lower ends to form the rotating part, and the shell 100 is provided with two open rotating grooves, and the rotating shaft 320 is rotatably arranged in the rotating groove, thereby improving the stability of the rotation of the cover plate 300.

[0069] To improve the automation level, in some embodiments, the driving mechanism 400 further comprises a driving member 420 and a moving member 430, the driving member 420 is arranged on the shell 100, the moving member 430 is movably arranged on the shell 100 along the thickness direction of the shell 100 and is in transmission connection with the output end of the driving member 420, and the two output shafts 410 are movably arranged on the shell 100 along the length direction of the shell 100, each output shaft 410 has a matching part, the moving member 430 is provided with at least two guide parts, and the guide parts are in sliding fit with the matching parts. The above arrangement helps to free the user's hands, avoids the user from being contaminated by oil during the opening and closing of the cover plates 300, and improves the user experience. When in use, only the button or other control member for controlling the driving member 420 needs to be triggered.

[0070] Regarding the connection relationship between the moving member 430 and the cover plates 300, in some embodiments, the moving member 430 is provided with a first sliding groove to form a guide part, one end of the output shaft 410 is provided with a sliding block 4111 to form a matching part, the sliding block 4111 is slidably arranged in the first sliding groove, and the moving member 430 can drive the sliding block 4111 to move to open the cover plates 300 during the forward movement of the moving member 430; one of the first sliding grooves comprises a first initial segment 431, a first driving segment 432 and a first terminal segment 433 which are connected in sequence, the first initial segment 431 and the first terminal segment 433 are parallel, and the first driving segment 432 is arranged obliquely; the other first sliding groove comprises a second initial segment 434, a second driving segment 435 and a second terminal segment 436 which are connected in sequence, the second initial segment 434 and the second terminal segment 436 are parallel, the second driving segment 435 is arranged obliquely, and the second driving segment 435 is located at the rear side of the first driving segment 432. The above arrangement enables the moving member 430 to drive the two cover plates 300 to rotate in sequence during the movement of the moving member 430. Specifically, when the first driving segment 432 starts to cooperate with the sliding block 4111 of the preceding output shaft 410, the rear output shaft 410 has not yet reached the second driving segment 435 and is located in the second initial segment 434, in this state, the moving member 430 continues to move, which drives the preceding cover plate 300 to open and the rear cover plate 300 to remain closed.

[0071] Both first sliding grooves are T-shaped grooves with openings facing the output shaft 410, and the sliding block 4111 is spherical. During the backward movement of the moving part 430, the sliding block 4111 is driven to move to drive the cover plate 300 to close. The above arrangement realizes the bidirectional cooperation of the first sliding groove and the sliding block 4111, that is, when the moving part 430 moves forward, the sliding block 4111 is pushed away from the end of the cover plate 300, so that the sliding block 4111 moves outward, the cover plate 300 opens, and when the moving part 430 moves backward, the sliding block 4111 is pushed to the end of the cover plate 300, so that the sliding block 4111 moves inward, the cover plate 300 closes, the structure is simple, and the opening and closing actions of the cover plate 300 are completed with as few components as possible. The spherical sliding block 4111 can adapt to the shape of the first sliding groove and help to ensure smooth sliding. Specifically, the cross-sectional profile of the first sliding groove is circular, and the opening faces the corresponding cover plate 300 and is adapted to the shape of the sliding block 4111.

[0072] To facilitate installation, the driving mechanism 400 further includes a sliding base 440 provided with a sliding channel, the output shaft 410 includes a sliding rod 411 and a hinged rod 412, the sliding rod 411 is slidingly arranged in the sliding channel, the sliding block 4111 is arranged at one end of the sliding rod 411, and the other end of the hinged rod 412 is hinged to the other end of the sliding rod 411. The other end of the hinged rod 412 is hinged to the cover plate 300. The above arrangement makes the sliding base 440 dual-purpose, saves the number of components, and improves the installation efficiency. Among the sliding base 440 and the moving part 430, one is provided with a sliding rail, and the other is provided with a second sliding groove in sliding cooperation with the sliding rail.

[0073] In some embodiments, the driving mechanism 400 includes a plurality of driving parts 420, and the plurality of driving parts 420 are in one-to-one driving connection with the plurality of cover plates 300. The driving part 420 can be a push rod motor, the extension shaft of the push rod motor forms the output shaft 410, the end of the push rod motor away from the extension shaft is hinged to the housing 100, and the end of the extension shaft is hinged to the cover plate 300.

[0074] To adapt to more application scenarios, each side of the length direction of the housing 100 is provided with a side smoke inlet 130 communicating with the smoke collecting cavity 110; each side smoke inlet 130 corresponds to at least two cover plates 300, and the two side smoke inlets 130 can be opened simultaneously or only one of them is opened.

[0075] In some embodiments, the two cover plates 300 in front corresponding to the two side smoke inlets 130 are opened or closed synchronously, so as to simultaneously suck the oil fume on both sides of the range hood and improve the suction efficiency; in addition, the two side inlets ensure the air flow rate of the air entering the volute 210 from the rear inlet, thereby ensuring the cooling effect of the motor 220.

[0076] Similarly, the two rear cover plates 300 corresponding to the two side smoke inlets 130 are synchronously opened or closed.

[0077] In some embodiments, the driving mechanism 400 further comprises a driving member 420 arranged in the housing 100 and two moving members 430 movably arranged in the housing 100 along the thickness direction of the housing 100 and in transmission connection with the output end of the driving member 420. The at least four output shafts 410 are respectively hinged to the four cover plates 300, and the output shafts 410 are movably arranged in the housing 100 along the length direction of the housing 100. Each output shaft 410 has a matching part, and each moving member 430 is provided with at least two guide parts to respectively slide with the at least two matching parts. For example, each moving member 430 is provided with two guide parts to respectively slide with the matching parts of the front and rear output shafts 410, so as to drive the two cover plates 300 on the same side of the range hood. Specifically, the moving member 430 is slidably arranged in the sliding base 440, and the output shaft 410 is slidably arranged in the sliding base 440.

[0078] One of the two moving members 430 is directly connected with the driving member 420, and the driving mechanism 400 further comprises a transfer member 450 connected between the two moving members 430 to drive the other moving member 430 to move synchronously through one of the moving members 430. The above arrangement realizes that one driving member 420 drives two moving members 430, and one of the two moving members 430 drives at least two cover plates 300, which greatly reduces the number of driving members 420 and the cost of the range hood.

[0079] The driving mechanism 400 is arranged in the housing 100 and located at the top of the smoke collecting cavity 110, so as to reduce the erosion of oil stains on the driving mechanism 400, ensure the use effect, improve the user experience, and prolong the service life.

[0080] The range hood further comprises a front smoke guide plate 500 movably arranged in the housing 100 to open or close the front smoke inlet 120. When the front smoke guide plate 500 is opened, the oil fume below is guided to enter the smoke collecting cavity 110 through the front smoke inlet 120. The opening and closing mode of the front smoke guide plate 500 can be realized by using the structure in the prior art.

[0081] In order to filter the oil stains, the range hood further comprises a first filter screen 510 arranged at the front smoke inlet 120. In other embodiments, a second filter screen is arranged at the side smoke inlet 130.

[0082] A third filter screen is arranged at the rear side of the fan 200 to filter the oil fume. The mounting bracket 240 is connected with the housing 100, the fan 200 is fixed on the mounting bracket 240, and the oil fume can enter the rear air inlet through the gap between the housing 100 and the fan 200.

[0083] The embodiment also provides a range hood control method applied to the range hood in any of the above embodiments, and the range hood control method comprises the following steps:

[0084] If the height of the pot on the cooking appliance is higher than the preset height, the cover plate 300 is opened, and the front smoke guide plate 500 is kept closed, so that the oil fume can enter the smoke collecting cavity 110 from the side smoke inlet 130; otherwise, further judgment is made on whether there is oil fume along the length direction of the range hood, and if yes, the cover plate 300 is opened, otherwise, the cover plate 300 is kept closed, and the front smoke guide plate 500 is opened, so that the oil fume is sucked only through the front smoke inlet 120.

[0085] In some embodiments, the height of the pot can be judged at the moment when the pot is placed steadily. Specifically, when the first sensor on the range hood detects that the pot is placed on the cooking appliance and the height of the pot does not change within 3s, the height of the pot is judged, and whether the height is greater than the preset height. When the height of the pot does not exceed the preset height, the second sensor on the range hood detects the oil fume on both sides of the length direction of the range hood every 10s during the cooking process, and judges whether there is oil fume, and if yes, the cover plate 300 on the corresponding side is opened.

[0086] It should be noted that all the sensors required for judgment are prior art, and the structure and working principle of each sensor are not limited herein.

[0087] Obviously, the above embodiments of the present application are only examples for clearly illustrating the present application, and are not intended to limit the implementation modes of the present application. For those skilled in the art, various obvious changes, readjustments and replacements can be made without departing from the protection scope of the present application. Here, it is not necessary and impossible to enumerate all the implementation modes. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the claims of the present application.

Claims

1. A range hood, characterized in that, include: The outer casing (100) has a smoke collection chamber (110) and a front smoke inlet (120), a side smoke inlet (130) and a smoke outlet (140) communicating with the smoke collection chamber (110). The front smoke inlet (120) is located on the front side of the outer casing (100), and the side smoke inlet (130) is located on at least one side of the outer casing (100) in the length direction. A fan (200) is disposed in the smoke collection chamber (110) and located behind the front smoke inlet (120). Gas entering the volute (210) of the fan (200) from the front air inlet or the rear air inlet of the fan (200) flows to the smoke outlet (140) through the air outlet of the fan (200). The motor (220) of the fan (200) is at least partially located behind the impeller (230). A cover plate (300), at least two cover plates (300) are arranged side by side along the thickness direction of the outer shell (100), and when all the cover plates (300) are closed, the side smoke inlet (130) is blocked. The cover plate (300) is rotatably disposed on the outer shell (100), and the axis of rotation extends along the height direction of the outer shell (100). The front smoke inlet (120), the smoke collection chamber (110) and the front air inlet are connected. When the cover plate (300) is open, the side smoke inlet (130), the smoke collection chamber (110) and the rear air inlet are connected. The drive mechanism (400) has at least two output shafts (410), which are respectively hinged to two cover plates (300). The at least two output shafts (410) can be activated sequentially to drive the cover plate (300) in front to open first and then drive the cover plate (300) in the back to open.

2. The range hood according to claim 1, characterized in that, When all the covers (300) are opened, at least the one located at the foremost side is in an inclined state and tilts backward from the outside toward the smoke collection chamber (110) to guide the flue gas entering from the side smoke inlet (130) to flow toward the rear side of the smoke collection chamber (110) so as to enter the volute (210) of the fan (200) from the rear air inlet of the fan (200).

3. The range hood according to claim 2, characterized in that, The cover plate (300) includes a cover body (310) and a rotating part disposed on the cover body (310) and cooperating with the outer shell (100). When the cover plate (300) is closed, the rotating part is located on the rear side of the cover body (310), and the cover plate (300) rotates outward to open the side smoke inlet (130).

4. The range hood according to claim 3, characterized in that, Along the height direction of the outer shell (100), each of the upper and lower ends of the cover body (310) is provided with a rotating shaft (320) to form the rotating part. The outer shell (100) is provided with two rotating grooves with opposite openings, and the rotating shaft (320) is rotatably disposed in the rotating groove.

5. The range hood according to claim 3, characterized in that, The drive mechanism (400) further includes a drive member (420) and a moving member (430). The drive member (420) is disposed on the housing (100). The moving member (430) is movably disposed on the housing (100) along the thickness direction of the housing (100) and is connected to the output end of the drive member (420). The two output shafts (410) are movably arranged on the housing (100) along the length direction of the housing (100). Each output shaft (410) has a mating part. The moving member (430) is provided with at least two guide parts, and the guide parts are slidably engaged with the mating parts.

6. The range hood according to claim 5, characterized in that, The movable part (430) is provided with a first groove to form a guide part, and one end of the output shaft (410) is provided with a slider (4111) to form the mating part. The slider (4111) is slidably disposed in the first groove. The moving part (430) can drive the slider (4111) to move to drive the cover plate (300) to open during the forward movement process. One of the first chutes includes a first initial segment (431), a first driving segment (432) and a first termination segment (433) that are connected to each other. The first initial segment (431) and the first termination segment (433) are parallel, and the first driving segment (432) is arranged at an angle. Another of the first chutes includes a second initial segment (434), a second drive segment (435), and a second termination segment (436) that are connected. The second initial segment (434) and the second termination segment (436) are parallel, the second drive segment (435) is arranged at an angle, and the second drive segment (435) is located behind the first drive segment (432).

7. The range hood according to claim 6, characterized in that, Both of the first slides are T-shaped grooves with openings facing the output shaft (410). The slider (4111) is spherical. The movement of the moving part (430) can drive the slider (4111) to move so as to close the cover plate (300).

8. The range hood according to claim 6, characterized in that, The drive mechanism (400) further includes a sliding base (440) with a sliding channel. The output shaft (410) includes a sliding rod (411) and a hinge rod (412). The sliding rod (411) is slidably disposed in the sliding channel. The slider (4111) is disposed at one end of the sliding rod (411). One end of the hinge rod (412) is hinged to the other end of the sliding rod (411), and the other end of the hinge rod (412) is hinged to the cover plate (300).

9. The range hood according to claim 1, characterized in that, Each side of the outer shell (100) along its length is provided with a side smoke inlet (130) that connects to the smoke collection chamber (110); each side smoke inlet (130) corresponds to at least two cover plates (300), and the two side smoke inlets (130) can be opened simultaneously or only one of them can be opened.

10. The range hood according to claim 9, characterized in that, The two front covers (300) corresponding to the two side smoke inlets (130) open or close synchronously; and / or, The two rear covers (300) corresponding to the two side smoke inlets (130) open or close synchronously.

11. The range hood according to claim 10, characterized in that, The drive mechanism (400) further includes a drive member (420) and two moving members (430). The drive member (420) is disposed on the housing (100). The two moving members (430) are movably disposed on the housing (100) along the thickness direction of the housing (100) and are connected to the output end of the drive member (420). At least four output shafts (410) are respectively hinged to four cover plates (300). The output shafts (410) are movably arranged on the housing (100) along the length direction of the housing (100). Each output shaft (410) has a mating part. Each moving member (430) has at least two guide parts to slide with at least two mating parts respectively.

12. The range hood according to claim 11, characterized in that, One of the two moving parts (430) is directly connected to the drive part (420). The drive mechanism (400) also includes a transfer part (450) connected between the two moving parts (430) so that the other moving part (430) can move synchronously through one of the moving parts (430).

13. The range hood according to claim 1, characterized in that, The drive mechanism (400) is located inside the housing (100) and at the top of the smoke collection chamber (110).

14. The range hood according to any one of claims 1-13, characterized in that, The range hood further includes a front guide plate (500), which is movably disposed on the outer casing (100) to open or close the front smoke inlet (120); and / or, The range hood also includes a first filter (510), which is located at the front smoke inlet (120).

15. A range hood control method, applied to the range hood according to any one of claims 1-14, characterized in that, Includes the following steps: If the height of the cookware is higher than the preset height, the cover plate (300) is opened so that the fumes can enter the smoke collection chamber (110) from the side smoke inlet (130); otherwise, further judgment is made to determine whether there are fumes on the side of the range hood along the length direction. If so, the cover plate (300) is opened; otherwise, the cover plate (300) is kept closed and the fumes are only drawn through the front smoke inlet (120).

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