A type of range hood

Abstract

This invention discloses a range hood, including a housing and an oil cup assembly disposed at the bottom of the housing. A lower panel is provided on the front side of the housing, the lower end of which is rotatably connected to the housing, and the upper end of which is detachably connected to the housing. The oil cup assembly includes an oil cup. The lower panel and oil cup have at least two states: a closed state, where the lower panel is closed relative to the housing, the oil cup is in a first position, and the lower end of the lower panel is close to the oil cup; and an open state, where the lower panel is open relative to the housing, and the oil cup is in a second position, which is lower than the first position. Compared with the prior art, the advantage of this invention is that by automatically lowering the oil cup when the lower panel is opened and raising it back into position when the lower panel is closed, gaps between the oil cup and the lower panel and the dispersion of odors are avoided.

Description

TECHNICAL FIELD

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

[0002] The extractor hood has become one of the indispensable kitchen household appliances in modern families. The extractor hood works by using the principle of fluid dynamics, sucking and exhausting the oil fume through the centrifugal fan installed inside the extractor hood, and using the filter screen to filter part of the oil particles. The centrifugal fan includes a volute, an impeller installed in the volute, and a motor driving the impeller to rotate. When the impeller rotates, a negative pressure suction force is generated at the center of the fan, which sucks the oil fume below the extractor hood into the fan, and the oil fume is collected and guided by the volute after being accelerated by the fan and then discharged outdoors.

[0003] At present, the side-suction type extractor hood gradually becomes the first choice of the majority of users in the kitchen with its low air inlet and high oil fume suction rate, and the smoke baffle of the extractor hood plays a key role. Common extractor hoods on the market include three-section panels, two-section panels, and floating panel type. Most of the current extractor hoods have an upper panel or a middle panel that can be opened, and the lower panel is generally a fixed structure and cannot be opened, so the height of the air inlet cannot be adjusted according to the actual use, and the user cannot clean the dirt behind the lower panel, resulting in a poor cleaning experience.

[0004] Therefore, there is an extractor hood disclosed in the Chinese patent with the applicant's application number, which includes a shell, an opening is formed on the front side of the shell, a panel assembly is arranged on the front side of the shell at the opening, the panel assembly includes a lower panel assembly below the air inlet, a smoke baffle is arranged at the air inlet and can open and close the air inlet by flipping relative to the shell, the lower part of the lower panel assembly is rotatably arranged on the shell, the upper part of the lower panel assembly is directly or indirectly detachably connected with the shell, and the bottom of the lower panel assembly also needs to ensure that there is no interference with the oil cup during the flipping process.

[0005] This extractor hood, because the oil cup will interfere with the flipping plate assembly, so one way is to cut off a part of the front end face of the oil cup, but in this way, from the front, there is a large gap between the lower end of the lower glass panel and the oil cup, affecting the appearance of the whole machine, and the oil cup looks very dirty after containing waste oil and is easy to emit odor.

[0006] In addition, the oil cup reminder is usually observed through the transparent observation port in the middle of the oil cup to see the oil amount, or a weighing sensor is used to weigh, and the problem of using transparent material to observe the oil amount of the oil cup is that as the use time of the oil cup increases, the transparent position may be adhered by oil, and the specific position of the oil cannot be observed, so that it cannot be judged whether the oil cup needs to be poured, and generally, the transparent part is designed to be small for overall aesthetics, which is not convenient for the elderly to see; and the method of using a weighing sensor involves detection elements and electrical control costs, which is high in cost.

[0007] In addition, when the impeller of the range hood is working, if a woman is cleaning or a child is moving around under the panel, it is easy to touch the rotating impeller, or the woman's hair is sucked into the range hood, which can easily cause danger. SUMMARY

[0008] The first technical problem to be solved by the present application is to provide a range hood to avoid gaps between the lower panel and the oil cup and odor emission in view of the deficiencies of the prior art.

[0009] The second technical problem to be solved by the present application is to provide a range hood with an oil cup oil amount reminder without the need for electrical control detection elements, simple and reliable structure, and low cost in view of the deficiencies of the prior art.

[0010] The third technical problem to be solved by the present application is to provide a range hood with improved safety protection performance when the lower panel is opened in view of the deficiencies of the prior art.

[0011] The technical solution adopted by the present application to solve the first technical problem is a range hood comprising a housing and an oil cup assembly arranged at the bottom of the housing, wherein the front side of the housing is provided with a lower panel, the lower end of the lower panel is rotatably connected to the housing, and the upper end of the lower panel is detachably connected to the housing; the oil cup assembly comprises an oil cup; characterized in that:

[0012] The lower panel and the oil cup have at least the following two states:

[0013] The closed state, wherein the lower panel is closed relative to the housing, the oil cup is in a first position, and the lower end of the lower panel is close to the oil cup;

[0014] The open state, wherein the lower panel is opened relative to the housing, the oil cup is in a second position, and the second position is lower than the first position.

[0015] By automatically moving the oil cup downward when the lower panel is opened and moving the oil cup upward when the lower panel is closed, gaps between the oil cup and the lower panel and odor emission are avoided.

[0016] Further, in order to facilitate the displacement of the oil cup, the shell has a bottom plate at the bottom, the oil cup is below the bottom plate, and the oil cup is constrained on the bottom plate in a lifting manner and keeps a tendency to approach the bottom plate.

[0017] Further, in order to facilitate the displacement of the oil cup, the shell has a bottom plate at the bottom, the oil cup is below the bottom plate, and the oil cup is constrained on the bottom plate in a lifting manner and keeps a tendency to approach the bottom plate.

[0018] Further, the lower end of the lower panel is provided with a hinge, the hinge is rotationally connected with the shell, the moving frame is provided with a boss, and the boss penetrates the bottom plate upwardly;

[0019] The range hood further comprises a linkage mechanism for linking the lower panel and the oil cup, the linkage mechanism is arranged in the shell and comprises a gear set and a cam, a primary gear of the gear set is fixed with the hinge, a final gear of the gear set is fixed with the cam, and the cam can press the boss downwardly when the final gear rotates. Thus, the opening of the lower panel and the displacement of the oil cup are in a linkage manner without additional driving force, the structure is simple, and the operability is strong.

[0020] Further, in order to facilitate the displacement of the oil cup, the shell has a bottom plate at the bottom, the oil cup is below the bottom plate, and the oil cup is constrained on the bottom plate in a lifting manner and keeps a tendency to approach the bottom plate.

[0021] Further, in order to facilitate the displacement of the oil cup, the shell has a bottom plate at the bottom, the oil cup is below the bottom plate, and the oil cup is constrained on the bottom plate in a lifting manner and keeps a tendency to approach the bottom plate.

[0022] Further, in order to facilitate the displacement of the oil cup, the shell has a bottom plate at the bottom, the oil cup is below the bottom plate, and the oil cup is constrained on the bottom plate in a lifting manner and keeps a tendency to approach the bottom plate.

[0023] The technical scheme adopted by the present application to solve the second technical problem is that the range hood further comprises a reminding device for reminding the oil cup to be full of oil, the reminding device comprises a whistle body fixedly arranged in the shell and a pressing plate frame linked with the oil cup, the whistle body is provided with a first opening and a second opening which are communicated with each other, and the pressing plate frame comprises a sleeve pipe matched with the whistle body; when the oil cup is not full of oil, the sleeve pipe blocks the second opening of the whistle body, and when the oil cup is full of oil, the sleeve pipe is below the second opening of the whistle body to open the second opening, so that the two openings of the whistle body can be used for air inlet and air outlet respectively to emit a whistle sound.

[0024] Further, the range hood further comprises a fan system, and the reminding device further comprises an air suction pipe, one end of the air suction pipe is located upstream of the fan system, and the other end of the air suction pipe is connected to the first opening of the whistle body, so that the airflow in the shell flows from the second opening to the first opening, and the whistle sound is generated by the airflow flowing directly by using the wind pressure of the fan system.

[0025] Further, the reminding device further comprises a buffer seat and an air outlet pipe, the whistle body is at least partially located in the buffer seat, and a gap exists between the outer peripheral wall of the whistle body and the inner peripheral wall of the buffer seat; the pressing plate frame penetrates into the buffer seat, and the air outlet pipe is in communication with the buffer seat, so that the airflow can enter the buffer seat from the air outlet pipe, is buffered, and then enters the whistle body to emit stable whistle sound.

[0026] Further, the range hood further comprises a fan system, and the reminding device further comprises an air suction pipe and an air blowing pipe, one end of the air suction pipe is located upstream of the fan system, the other end of the air suction pipe is connected to the air outlet pipe, one end of the air blowing pipe is located downstream of the fan system, and the other end of the air blowing pipe is connected to the first opening of the whistle body, so that the airflow flows from the first opening to the second opening, and the whistle sound is generated by the airflow flowing directly by using the wind pressure of the fan system.

[0027] Further, a longitudinal extension accommodation groove is formed in the peripheral wall of the buffer seat, and the pressing plate frame further comprises a sealing plate matched with the accommodation groove;

[0028] When the oil cup is not filled with oil, the accommodation groove is at least partially opened, and when the oil cup is filled with oil, the sealing plate blocks the accommodation groove, so that the pressure relief when the second opening of the whistle body is opened can be avoided.

[0029] The technical scheme adopted by the present application to solve the third technical problem is that the range hood further comprises a fan system, a whistle body fixedly arranged in the shell, and a pressing plate frame linked with the oil cup, the whistle body is provided with a first opening and a second opening, one of the openings is in communication with a negative pressure area generated by the operation of the fan system, or one of the openings is in communication with the negative pressure area generated by the operation of the fan system and the other opening is in communication with a positive pressure area generated by the operation of the fan system.

[0030] The pressing plate frame comprises a sleeve matched with the whistle body, when in a closed state, the sleeve blocks the second opening of the whistle body, and when in an open state, the sleeve is located below the second opening of the whistle body to open the second opening, so that the two openings of the whistle body can be used for air inlet and air outlet respectively to emit the whistle sound.

[0031] Compared with the prior art, the oil cup is automatically moved down to make room when the lower panel is opened, and the oil cup is moved up to return to the original position when the lower panel is closed, so as to avoid the gap between the oil cup and the lower panel and the emission of peculiar smell; the opening of the lower panel and the movement of the oil cup are in a linkage mode without additional driving force, so that the structure is simple and the operability is strong; the whistle body is combined with the movement of the oil cup to realize oil fullness reminding, preferably, the airflow of the fan system is utilized, so that no electric control detection element is needed, and almost no energy is consumed, the structure is simple and reliable, and the cost is low; the smoke machine alarm function is also provided when the lower panel is opened, so as to ensure that the impeller is in a stationary state when the lower panel is opened, and the safety of the user is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 Fig. 1 is a schematic view of the lower panel of the range hood in the closed state according to the first embodiment of the present application;

[0033] Figure 2 Fig. 2 is a schematic view of the lower panel of the range hood in the closed state according to the first embodiment of the present application, in which the hidden part of the shell is shown;

[0034] Figure 3 Fig. 3 is a schematic view of the lower panel of the range hood in the closed state according to the first embodiment of the present application, in which the hidden part of the shell and the reminding device are shown; Figure 2 Fig. 4 is an enlarged view of part I of Fig. 3;

[0035] Figure 4 Fig. 5 is a schematic view of the lower panel of the range hood in the closed state according to the first embodiment of the present application, in which the hidden part of the shell and the reminding device are shown;

[0036] Figure 5 Fig. 6 is an enlarged view of part II of Fig. 5; Figure 4

[0037] Figure 6 Fig. 7 is a schematic view of the oil cup assembly of the range hood according to the first embodiment of the present application;

[0038] Figure 7 Fig. 8 is a schematic view of part of the structure of the oil cup assembly of the range hood according to the first embodiment of the present application;

[0039] Figure 8 Fig. 9 is a schematic view of the lower panel of the range hood and the linkage mechanism thereof and the oil cup according to the first embodiment of the present application;

[0040] Figure 9 Fig. 10 is an exploded structural schematic view of the linkage mechanism of the lower panel and the oil cup of the range hood according to the first embodiment of the present application;

[0041] Figure 10 Fig. 11 is a schematic view of the reminding device of the range hood according to the first embodiment of the present application (the first state in which the air suction pipe is hidden);

[0042] Figure 11 Fig. 12 is an exploded structural schematic view of the reminding device of the range hood according to the first embodiment of the present application (the air suction pipe is hidden);​

[0043] Figure 12 Cross-sectional view of the reminder device of the range hood of the first embodiment of the present application (with the suction duct hidden);

[0044] Figure 13 Schematic view of the lower panel of the range hood of the first embodiment of the present application in the open state;

[0045] Figure 14 Schematic view of the lower panel of the range hood of the first embodiment of the present application in the open state, with the hidden portion of the casing;

[0046] Figure 15 Schematic view of the lower panel of the range hood of the first embodiment of the present application in the open state, with the hidden portion of the casing and the reminder device; Figure 14

[0047] Figure 16 Schematic view of the lower panel of the range hood of the first embodiment of the present application in the open state, with the hidden portion of the casing and the reminder device;

[0048] Figure 17 Schematic view of the lower panel of the range hood of the first embodiment of the present application in the open state, with the hidden portion of the casing and the reminder device; Figure 16

[0049] Figure 18 Schematic view of the reminder device of the range hood of the first embodiment of the present application (with the suction duct hidden, second state);

[0050] Figure 19 Schematic view of the lower panel of the range hood of the second embodiment of the present application in the closed state, with the hidden portion of the casing;

[0051] Figure 20 Schematic view of the lower panel of the range hood of the second embodiment of the present application in the closed state, with the hidden portion of the casing; Figure 19

[0052] Figure 21 Schematic view of the reminder device of the range hood of the second embodiment of the present application (with the suction duct hidden, first state);

[0053] Figure 22 Exploded structural schematic view of the reminder device of the range hood of the second embodiment of the present application (with the suction duct hidden);

[0054] Figure 23 Cross-sectional view of the reminder device of the range hood of the second embodiment of the present application (with the suction duct hidden);

[0055] Figure 24 Schematic view of the lower panel of the range hood of the second embodiment of the present application in the open state, with the hidden portion of the casing;

[0056] Figure 25 Schematic view of the lower panel of the range hood of the second embodiment of the present application in the open state, with the hidden portion of the casing; Figure 24 ​​​​

[0057] Figure 26 Fig. 4 is a schematic view of the reminder device of the range hood according to the second embodiment of the present application (with the suction duct hidden, second state);

[0058] Figure 27 Fig. 5 is a sectional view of the reminder device of the range hood according to the second embodiment of the present application (with the suction duct hidden, second state). DETAILED DESCRIPTION

[0059] Embodiments of the present application will be described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals indicate the same or similar elements or elements having the same or similar functions.

[0060] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, since the disclosed embodiments of the present application can be arranged in different directions, so these orientation-indicating terms are only illustrative and should not be regarded as limiting, such as "upper", "lower" are not necessarily limited to the direction opposite or consistent with the direction of gravity. In addition, the features defined as "first", "second" can explicitly or implicitly include one or more of the features.

[0061] Embodiment One

[0062] Referring to Figure 1 , Figure 2 , Figure 13 and Figure 14 , a range hood includes a housing 1, the housing 1 is provided with a smoke baffle 2 and a lower panel 3 on the front side, the smoke baffle 2 can move relative to the housing 1 to open the air inlet 12 on the housing 1, the opening mode is such as the existing technology disclosed flip, translation, etc. The fan system 5 of the range hood can be all or part of the housing 1.

[0063] A lower panel 3 is arranged below the smoke baffle 2, which can be opened relative to the housing 1 during cleaning to facilitate cleaning of the interior of the housing 1 and the fan system. The lower panel 3 is rotatably connected to the housing 1, and the lower end of the lower panel 3 is rotatably connected to the housing 1, such as being connected to the housing 1 by a hinge 31, and the rotation axis extends in the left-right direction, and the upper end of the lower panel 3 is detachably connected to the housing 1, such as being clamped and fixed to the housing 1 by a clasp 32, or other ways such as insertion, magnetic attraction, etc. The housing 1 has a bottom plate 11 at the bottom, and the bottom plate 11 is provided with an oil cup assembly 4.

[0064] The above structure is prior art, which will not be described here.

[0065] Referring to Figure 2 , Figure 3 , Figures 6-9 In order to solve the gap problem between the lower panel 3 and the oil cup assembly 4, in the embodiment, the oil cup assembly 4 is a movable assembly. The oil cup assembly 4 includes an oil cup 41, a fixed frame 42, a moving frame 43, a guide column 441, a guide sleeve 442, an oil cup hook 45, a boss 46, and an elastic member 47. Among them, the fixed frame 42 is fixed on the upper surface of the bottom plate 11 of the housing 1, i.e. inside the housing 1, while the moving frame 43 is arranged below the bottom plate 11, i.e. outside the housing 1, and the moving frame 43 is constrained on the fixed frame 42 (bottom plate 11) in a lifting manner. The lower surface of the moving frame 43 is fixed with the above-mentioned oil cup hook 45, and the oil cup hook 45 can have two, respectively located on the left and right sides of the moving frame 43, and the oil cup 41 is hung with the moving frame 43 through the oil cup hook 45, so that the oil cup 41 can move up and down with the moving frame 43.

[0066] The fixed frame 42 is provided with a third oil leakage hole 421, and the moving frame 43 can be provided with a second oil leakage hole 431 at the corresponding position, and the bottom plate 11 can be provided with a first oil leakage hole 111 at the corresponding position, so that the oil stains flowing down from the housing 1 can enter the oil cup 41 in turn through the third oil leakage hole 421, the first oil leakage hole 111 and the second oil leakage hole 431. Preferably, the length in the left-right direction and the width in the front-back direction of the fixed frame 42 and the moving frame 43 are adapted (consistent).

[0067] The guide post 441 is arranged on the moving frame 43 and penetrates the bottom plate 11 and the fixed frame 42 upwardly, and the guide sleeve 442 is arranged on the top of the guide post 441 and has a size greater than that of the guide post 441. The elastic member 47, which is preferably a spring in this embodiment, is sleeved on the outer periphery of the guide post 441, the lower end of the elastic member 47 is fixed on the upper surface of the fixed frame 42, and the upper end of the elastic member 47 abuts against the guide sleeve 442, so that the elastic member 47 makes the moving frame 43 keep a tendency of being close to the bottom plate 11, i.e. the moving frame 43 keeps close to the fixed frame 42 so as to be in a small gap state. The abovementioned boss 46 is arranged on the upper surface of the moving frame 43 and penetrates the bottom plate 11 and the fixed frame 42 upwardly.

[0068] Alternatively, the oil cup assembly 4 can also not be provided with the fixed frame 42, but the bottom plate 11 directly functions as the abovementioned fixed frame 42, and the moving frame 43 is movably constrained on the bottom plate 11, and the lower end of the elastic member 47 is also directly fixed on the bottom plate 11.

[0069] The range hood further comprises a linkage mechanism for linking the oil cup assembly 4 and the lower panel 3, which comprises a gear set 51 and a cam 52. The gear set 51 can have at least two gears, and in this embodiment, has four gears which are sequentially meshed. The linkage mechanism further comprises a gear holder 53 for arranging the gear set 51, which is fixedly arranged in the housing 1. The primary gear 511 of the gear set 51 is fixed with the hinge 31 of the lower panel 3, the end of the hinge 31 connected with the primary gear 511 penetrates through the fixing pin 33, the fixing pin 33 penetrates through the hinge 31 and the primary gear 511 and is fixed with the gear holder 51, so as to serve as a support shaft of the hinge 31 and the primary gear 511, and the hinge 31 and the primary gear 511 are respectively rotatable relative to the fixing pin 33. The primary gear 511 and the hinge 31 can be fixed by arranging a fixing column on the primary gear 511 and arranging a fixing hole on the hinge 31, so that the fixing column penetrates through the fixing hole and is fixed. The cam 52 is arranged on the last gear 512 of the gear set 51 and rotates synchronously with the last gear 512, and the position of the cam 52 corresponds to the boss 46 of the oil cup assembly 4. The rotation axes of the hinge 31, the gears of the gear set 51 and the cam 52 are all in the left-right direction.

[0070] When the impeller of the fan system 5 needs to be cleaned or disassembled, the lower panel 3 is opened, i.e. the catch 32 is forced to be disengaged, so that the lower panel 3 rotates about the fixing pin 33. Since the primary gear 511 of the gear set 51 is fixed with the hinge 31, when the lower panel 3 is opened, the hinge 31 rotates with the primary gear 511, the last gear 512 of the gear set 51 drives the cam 52 to rotate through the transmission of the gear set 51, so that the cam 52 rotates counterclockwise Figure 4 and Figure 5clockwise direction), the convex boss 46 will be contacted during the rotation, and then the moving frame 43 will be pressed to move downwards, and then the oil cup 41 will be moved downwards to make room for the opening of the lower panel 3, as shown in Figure 16 and Figure 17 , which is the second position of the oil cup 41.

[0071] When the lower panel 3 is closed, the gear set 51 will drive the cam 52 to rotate clockwise, and the cam 52 will no longer press against the convex boss 46. The oil cup 41 will rebound to the original position under the action of the elastic restoring force of the elastic member 47, and the lower end of the lower panel 3 will be close to the oil cup 41, as shown in Figure 4 and Figure 5 , which is the first position of the oil cup 41, and the second position described above is lower than the first position.

[0072] Alternatively, the linkage mechanism can also convert rotation into linear motion in other ways, such as multi-link mechanism, worm gear, gear rack, screw nut, etc.

[0073] In order to remind the user to clean the oil cup 41 when the oil cup 41 is full of waste oil, in the present application, the range hood further comprises a reminding device. In the present embodiment, referring to Figure 2 , Figure 3 , Figures 10-12 , the reminding device comprises a whistle body 61, a suction pipe 62, a pressing plate frame 63 and a support seat 64. One end of the suction pipe 62 is connected to a position close to the air inlet 12 of the housing 1, i.e. the end of the suction pipe 62 is located upstream of the fan system 5, and the other end of the suction pipe 62 is connected to the whistle body 61, which is provided with a first opening 611 and a second opening 612, wherein the first opening 611 is provided at the top, and the second opening 612 is provided at the side. The support seat 64 is fixedly arranged in the housing 1, such as being arranged on the fixed frame 42 of the oil cup assembly 4, and the whistle body 61 is arranged on the support seat 64, with the first opening 611 of the whistle body 61 away from the top of the support seat 64 being connected to the suction pipe 62, so that the inside of the suction pipe 62 and the inside of the whistle body 61 are communicated. The pressing plate frame 63 is fixed with the guide column 441, and the pressing plate frame 63 comprises a sleeve 631 and a frame body 632, wherein the sleeve 631 is sleeved on the outer periphery of the whistle body 61, and the frame body 632 fixes the sleeve 631 and the guide column 441. In the present embodiment, the guide column 441 and the frame body 632 both have two arranged in front and back. In the present embodiment, the first opening 611 of the whistle body 61 is the air outlet, and the second opening 612 is the air inlet.

[0074] When the range hood is turned on, the end of the suction pipe 62 away from the whistle body 61 is under negative pressure, and when the amount of waste oil in the oil cup 41 is small, referring to Figure 10 and Figure 12, the sleeve 631 of the pressing plate frame 63 will block the second opening 612 of the whistle body 61, and no gas flows through the whistle body 61, so there is no sound, reminding the device to be in the first state. As the waste oil accumulates, the elastic member 47 is gradually compressed, and then the moving frame 43 will move the pressing plate frame 63 downward, see Figure 15 and Figure 18 When the pressing plate frame 63 moves to a position where the second opening 612 of the whistle body 61 is exposed, under the negative pressure of the range hood, the airflow in the shell 1 flows from the second opening 612 to the first opening 611, and then the whistle sound is emitted, reminding the user to pour the oil cup 41. The sound emitting principle is to use vibration to emit sound. When the gas flows through (flows into / out of) the second opening 612 of the whistle body 61, due to the different flow rates of the gas flow, turbulence will be generated, forcing the gas flow to vibrate and emit sound. The reminder device shown in Figure 14 and Figure 15 is only a schematic of the second state of the reminder device, and does not mean that the lower panel 3 must be in an open state at this time.

[0075] This detection method is simple, and once the range hood is turned on, the detection will be implemented, and no electrical components are required, which is low in cost and does not consume energy.

[0076] If the lower panel 3 is accidentally opened during the operation of the range hood, due to the downward movement of the moving frame 43 and the oil cup 41, which is equivalent to the state change of the oil being full, the sleeve 631 of the pressing plate frame 63 no longer blocks the second opening 612 of the whistle body 61, and the whistle sound will also be emitted, which can avoid the risk of hair being sucked into or being scratched during the rotation of the fan system 5 when the lower panel 3 is opened.

[0077] Embodiment Two

[0078] Referring to Figures 19-23 In this embodiment, the reminder device is different from that in the above-mentioned embodiment one. The reminder device further includes a blowing pipe 65, a buffer seat 66, and an air outlet pipe 67, and no longer includes the support seat 64.

[0079] The air suction pipe 62 is no longer connected to the whistle body 61, but is connected to one end of the air outlet pipe 67, and the other end of the air outlet pipe 67 is connected to the buffer seat 66, thereby being in communication with the buffer seat 66. One end of the blowing pipe 65 is connected to the air outlet of the fan system 5, and the other end is connected to the first opening 611 of the whistle body 61, thereby being in communication with the whistle body 61. The buffer seat 66 is in a hollow cylindrical shape, the whistle body 61 is at least partially located in the buffer seat 66, there is a gap between the outer peripheral wall of the whistle body 61 and the inner peripheral wall of the buffer seat 66, and the end of the whistle body 61 connected to the blowing pipe 65 can extend upward out of the buffer seat 66. In this embodiment, the first opening 611 of the whistle body 61 is an air inlet, and the second opening 612 is an air outlet.

[0080] The frame body 632 of the pressing plate frame 63 penetrates into the buffer seat 66, and the circumferential wall of the buffer seat 66 is provided with a longitudinally extending accommodation slot 661, and the pressing plate frame 63 further comprises a sealing plate 633 matched with the accommodation slot 661.

[0081] When the range hood is turned on, the outlet of the fan system 5 is under positive pressure, and air is blown into the whistle body 61, and the air discharged from the second opening 612 of the whistle body 61 is first released in the buffer seat 66, and then blown away through the air outlet pipe 67 and the air inlet pipe 62, so that the flow of air flow is generated, causing the whistle body 61 to emit sound. When the waste oil in the oil cup 41 is full, the elastic member 47 is compressed, and the moving frame 43 will press the pressing plate frame 63 to move downward, and when the pressing plate frame 63 moves to a position where the second opening 612 of the whistle body 61 is exposed, the air flow is connected in the whistle body 61 under the action of the positive and negative pressure of the range hood, and the air flow flows from the first opening 611 to the second opening 612, and then the whistle sound is emitted, reminding the user to pour the oil cup. Referring to Figures 24-27 In order to seal the oil fume in the connection process, when the pressing plate frame 63 moves downward and the air flow is connected, the sealing plate 633 will block the accommodation slot 661 of the buffer seat 66, so as to avoid the leakage of oil fume.

[0082] Referring to Figure 21 and Figure 22 When the amount of waste oil is small, the sleeve 631 of the pressing plate frame 63 will block the second opening 612 of the whistle body 61, so that the air flow cannot pass through, and the whistle sound disappears.

[0083] In addition to the sound prompt when the oil cup 41 is full, the amount of oil can also be judged through the gap between the oil cup 41 and the lower panel 3, and when the amount of waste oil is large, the gap will be large, and the amount of waste oil can be seen through the gap position.

[0084] In addition, the reminder device shown in Figure 24 and Figure 25 is only a schematic of the second state of the reminder device, and does not mean that the lower panel 3 must be in an open state at this time.

Claims

1. A range hood comprising a housing (1) and an oil cup assembly (4) arranged at the bottom of the housing (1), the front side of the housing (1) being provided with a lower panel (3), the lower end of the lower panel (3) being rotatably connected to the housing (1), and the upper end of the lower panel (3) being detachably connected to the housing (1); the oil cup assembly (4) comprising an oil cup (41), the housing (1) having a bottom plate (11) at the bottom, and the oil cup (41) being arranged below the bottom plate (11); characterized in that: the lower panel (3) and the oil cup (41) have at least the following two states: a closed state, in which the lower panel (3) is closed relative to the housing (1), the oil cup (41) is in a first position, and the lower end of the lower panel (3) is close to the oil cup (41); and an open state, in which the lower panel (3) is open relative to the housing (1), the oil cup (41) is in a second position, and the second position is lower than the first position. the oil cup (41) is constrained on the bottom plate (11) in a manner capable of lifting and keeps a tendency to approach the bottom plate (11). the oil cup assembly (4) further comprises a moving frame (43), the moving frame (43) is arranged below the bottom plate (11), the oil cup (41) is hung on the moving frame (43), and the moving frame (43) is constrained on the bottom plate (11) in a manner capable of lifting and keeps a tendency to approach the bottom plate (11). the lower end of the lower panel (3) is provided with a hinge (31), the hinge (31) is rotatably connected to the housing (1), the moving frame (43) is provided with a boss (46), and the boss (46) penetrates the bottom plate (11) upwardly; 2. The hood according to claim 1, characterized in that: the range hood further comprises a linkage mechanism for linking the lower panel (3) and the oil cup (41), the linkage mechanism is arranged in the housing (1) and comprises a gear set (51) and a cam (52), a primary gear (511) of the gear set (51) is fixed to the hinge (31), a final gear (512) of the gear set (51) is fixed to the cam (52), and the cam (52) can press the boss (46) downwardly when the final gear (512) rotates.

3. The hood according to claim 2, characterized in that: the oil cup assembly (4) further comprises a guide column (441), the guide column (441) is arranged on the moving frame (43), the guide column (441) penetrates the bottom plate (11) upwardly, and the guide column (441) is in sliding fit with the bottom plate (11).

4. The hood according to claim 3, characterized in that: the oil cup assembly (4) further comprises a guide sleeve (442) and an elastic member (47), the guide sleeve (442) is arranged at the top of the guide column (441), the elastic member (47) is sleeved on the outer periphery of the guide column (441), the lower end of the elastic member (47) is directly or indirectly fixed to the bottom plate (11), and the upper end of the elastic member (47) abuts against the guide sleeve (442), so that the moving frame (43) keeps a tendency to approach the bottom plate (11). a first oil leakage hole (111) is formed in the bottom plate (11), and a second oil leakage hole (431) is formed at the corresponding position of the moving frame (43).

5. The hood according to claim 3, characterized in that: ​ 6. The hood according to claim 5, characterized in that: ​ 7. The hood according to claim 3, characterized in that: ​ 8. The hood according to claim 1, characterized in that: The range hood further comprises a reminding device for reminding the oil cup (41) to be full of oil, the reminding device comprises a whistle body (61) fixedly arranged in the housing (1) and a pressing plate frame (63) linked with the oil cup (41), the whistle body (61) is provided with a first opening (611) and a second opening (612) in communication with each other, and the pressing plate frame (63) comprises a sleeve (631) matched with the whistle body (61); when the oil cup (41) is not full of oil, the sleeve (631) blocks the second opening (612) of the whistle body (61), and when the oil cup (41) is full of oil, the sleeve (631) is located below the second opening (612) of the whistle body (61) to open the second opening (612), so that the two openings of the whistle body (61) can be used for air inlet and air outlet respectively to emit a whistle sound.

9. The hood according to claim 8, characterized in that: The range hood further comprises a fan system (5), and the reminding device further comprises an air suction pipe (62), one end of the air suction pipe (62) is located upstream of the fan system (5), and the other end of the air suction pipe (62) is connected to the first opening (611) of the whistle body (61), so that the airflow in the housing (1) flows from the second opening (612) to the first opening (611).

10. The hood according to claim 8, characterized in that: The reminding device further comprises a buffer seat (66) and an air outlet pipe (67), the whistle body (61) is at least partially located in the buffer seat (66), and a gap exists between the outer peripheral wall of the whistle body (61) and the inner peripheral wall of the buffer seat (66); the pressing plate frame (63) penetrates into the buffer seat (66), and the air outlet pipe (67) is in communication with the buffer seat (66).

11. The hood according to claim 10, characterized in that: The range hood further comprises a fan system (5), and the reminding device further comprises an air suction pipe (62) and an air blowing pipe (65), one end of the air suction pipe (62) is located upstream of the fan system (5), the other end of the air suction pipe (62) is connected to the air outlet pipe (67), one end of the air blowing pipe (65) is located downstream of the fan system (5), and the other end of the air blowing pipe (65) is connected to the first opening (611) of the whistle body (61), so that the airflow flows from the first opening (611) to the second opening (612).

12. The hood according to claim 10, characterized in that: A longitudinally extending accommodation groove (661) is formed in the peripheral wall of the buffer seat (66), and the pressing plate frame (63) further comprises a sealing plate (633) matched with the accommodation groove (661); When the oil cup (41) is not full of oil, the accommodation groove (661) is at least partially opened, and when the oil cup (41) is full of oil, the sealing plate (633) blocks the accommodation groove (661).

13. The hood according to claim 1, characterized in that: The range hood further comprises a fan system (5), a whistle body (61) fixedly arranged in the housing (1) and a pressing plate frame (63) linked with the oil cup (41), the whistle body (61) is provided with a first opening (611) and a second opening (612), one of the openings is in communication with a negative pressure area generated by the operation of the fan system (5), or one of the openings is in communication with the negative pressure area generated by the operation of the fan system (5) and the other opening is in communication with a positive pressure area generated by the operation of the fan system (5). The pressing plate frame (63) comprises a sleeve (631) matched with the whistle body (61), when in the closed state, the sleeve (631) blocks the second opening (612) of the whistle body (61), when in the open state, the sleeve (631) is located below the second opening (612) of the whistle body (61) to open the second opening (612), so that the two openings of the whistle body (61) can be used for air inlet and air outlet respectively to emit the whistle sound.

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