Range hood

Abstract

A range hood, comprising: a box body (1), a fume inlet (12) being formed in the front side portion thereof; an oil guide plate (5) arranged in the box body (1); a fan system (2) also arranged in the box body (1) and located on the rear side of the oil guide plate (5); and a fume baffle (3) and a movement mechanism used for driving the fume baffle (3) to open and close the fume inlet (12), wherein the movement mechanism comprises a push rod assembly (41) and a push rod support (42), the push rod assembly (41) is mounted on the push rod support (42), and the push rod support (42) is fixed on the left side portion or the right side portion of the oil guide plate (5).

Description

An extractor hood 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. Generally, the extractor hood includes a top suction type and a side suction type. The side suction type extractor hood utilizes the vortex wind pressure principle to absorb most of the oil fume close to the cooking table in an arc form, which can reduce the adverse effects on human health, and the power source is close to the cooking table, which basically will not reduce the suction effect of the power source.

[0003] The oil guide plate is connected with multiple components and exchanges energy in the extractor hood. The oil guide plate exchanges smoke and oil stains with the air inlet, and the oil guide plate is physically connected with the fan system and exchanges smoke and oil stains. The oil guide plate is physically connected with the box body, and the oil guide plate exchanges oil stains with the oil cup. Therefore, the design of the oil guide plate plays an important role in the performance, oil circuit, rigidity and other aspects of the extractor hood.

[0004] The existing side suction type extractor hood, such as the extractor hood disclosed in the Chinese patent with the application number 201810509576.9 (publication number CN110529894A) of the applicant, includes a casing, a panel, an oil guide plate, and a fan system with a motor. The panel and the oil guide plate are respectively and obliquely arranged between the left and right side plates of the casing. The panel is located in front of the oil guide plate and is spaced apart from the oil guide plate. An air inlet is formed in the panel, and a smoke baffle is rotatably installed on the air inlet. An air suction opening is formed in the oil guide plate, and an air inlet ring of the fan system is installed in the air suction opening.

[0005] The above-mentioned extractor hood is usually applied in North America, because the distance between the cooking appliance burner and the wall is far, so the air inlet is arranged at a position close to the upper part of the extractor hood, and the under-cabinet machine requires that the fan system of the extractor hood must be inside the box body and cannot be higher than the top plate. There is a wedge angle (inverted triangle) between the oil guide plate and the lower panel of the extractor hood. When the oil fume passes through the oil guide plate space from the air inlet to the fan system inlet, vortexes are generated at the wedge angle of the fluid cavity near the fan system, as shown in A in FIG. 10, thereby negatively affecting the performance of the extractor hood.

[0006] In addition, the extractor hood of some users in the market is slightly inclined forward in the hanging state, so that the oil guide plate is inclined, and the front side is lower than the rear side. Therefore, the oil on the oil guide plate flows forward to the upper part of the air inlet and then drips from the air inlet, which reduces the customer's experience of using the extractor hood.

[0007] In addition, the commonly used electric push rod for driving the smoke baffle to move is disclosed in the Chinese patents with the application numbers 202021358418.7 (publication number CN213237663U), 201621489054.X (publication number CN206377721U) and the like of the present applicant. When the smoke baffle is opened, the push rod hinge is located outside the whole machine box, which causes the oil path to be located; at the same time, the smoke baffle support and the push rod and the hinge form a shear surface; and when the box is deformed, the movement structure is easily affected to cause the push rod to fail (not to be opened, abnormal sound, etc.). SUMMARY

[0008] The first technical problem to be solved by the present application is to provide an extractor hood to avoid the push rod hinge of the movement mechanism being exposed in the oil path and the push rod shear surface being exposed, and to ensure that the push rod will not fail due to the deformation of the box.

[0009] The second technical problem to be solved by the present application is to provide an extractor hood to improve the vortex and improve the performance of the whole machine.

[0010] The third technical problem to be solved by the present application is to provide an extractor hood to avoid the oil droplets on the top of the oil guide plate from penetrating into the smoke inlet.

[0011] The technical solution adopted by the present application to solve the above-mentioned first technical problem is as follows: an extractor hood comprising:

[0012] a box, the front side of which is formed with a smoke inlet;

[0013] an oil guide plate arranged in the box;

[0014] a fan system also arranged in the box and located at the rear side of the oil guide plate;

[0015] a smoke baffle; and

[0016] a movement mechanism for driving the smoke baffle to open and close the smoke inlet; characterized in that:

[0017] the movement mechanism comprises a push rod assembly and a push rod support, the push rod assembly is installed on the push rod support, and the push rod support is fixed to the left side or the right side of the oil guide plate.

[0018] By installing the push rod assembly of the movement mechanism on the oil guide plate, the problem of the push rod failing due to the deformation of the box is avoided, and space is provided for avoiding the push rod hinge of the movement mechanism being exposed in the oil path and the push rod shear surface being exposed; and the problems of insufficient sheet metal strength and insufficient space for placing the push rod caused by the push rod being built-in (such as being fixed on the top of the box) are also avoided.

[0019] Further, the oil guide plate comprises a first oil guiding part, a second oil guiding part, a third oil guiding part and a fourth oil guiding part, the first oil guiding part extends from front to back, the second oil guiding part extends downward from the rear end of the first oil guiding part, the third oil guiding part is arranged at the left end of the first oil guiding part and the second oil guiding part, the fourth oil guiding part is arranged at the right end of the first oil guiding part and the second oil guiding part, the second oil guiding part cooperates with the fan system, and the push rod support is arranged on the outer side of the third oil guiding part or the fourth oil guiding part.

[0020] Further, the third oil guiding part or the fourth oil guiding part of the oil guide plate, on which the push rod support is arranged, is inclined to the opposite oil guiding part from front to back.

[0021] Further, the third oil guiding part or the fourth oil guiding part of the oil guide plate, on which the push rod support is arranged, is formed with triangular ribs, the triangular ribs are formed by the corresponding oil guiding part protruding backward, the triangular ribs have good stability and high strength, and can make the movement mechanism more stable.

[0022] Further, to facilitate the molding of the triangular ribs, the profile edges of the triangular ribs are rounded.

[0023] Further, to improve the strength of the side of the oil guide plate on which the push rod assembly is installed, the oil guide plate is provided with screws at the upper and lower positions close to the triangular ribs.

[0024] Further, to improve the strength of the oil guide plate, the first oil guiding part is in a V shape bent downward.

[0025] Preferably, the bent part of the first oil guiding part corresponds to the upper side of the installation position of the push rod support.

[0026] Further, the movement mechanism further comprises a rotating shaft assembly, the rotating shaft assembly comprises a hinge, the hinge comprises a first part located in the box and a second part penetrating out of the box, one end of the first part is connected with the output end of the push rod assembly, the other end of the first part is rotationally supported in the box, the second part extends away from the first part from the part between the two ends of the first part, and the second part is fixed to the back side of the smoke baffle facing the box. In this way, the push rod hinge of the movement mechanism can be better hidden from the oil path and the push rod shear surface.

[0027] Further, to facilitate the arrangement and partial concealment of the hinge, the box comprises a front plate, the smoke inlet is arranged on the front plate, and the front plate comprises an upper panel located above the upper edge of the smoke inlet.

[0028] The oil guide plate further comprises a mounting structure arranged on the front side of the first oil guide part and fixed with the upper panel, and a clearance hole is formed in the mounting structure, and the second part passes through the clearance hole.

[0029] Preferably, the second part has a cross section in the shape of a fan ring, so as to minimize the size of the clearance hole and reduce the influence of the hole on the strength of the oil guide plate.

[0030] Further, the mounting structure comprises a first mounting part and a second mounting part, the first mounting part extends forward from the front end of the first oil guide part, the second mounting part extends upward from the front end of the first mounting part, the first mounting part is used for mounting the functional module, the second mounting part is used for being fixed with the upper panel, and the first part of the hinge is located above the first mounting part.

[0031] The hinge assembly further comprises a support fixed on the upper surface of the first mounting part, and the first part of the hinge is rotationally supported in the cabinet by being rotationally connected with the support. Since the position of the hinge corresponds to the clearance hole, the support is additionally arranged to avoid the clearance hole, and the hinge and the support are rotationally connected, so as to rotationally support the hinge in the cabinet.

[0032] Further, a flange edge extending upward is formed around the clearance hole part on the first mounting part. In this way, the strength can be increased, and the oil guide plate at the clearance hole can be prevented from being torn due to the force of the push rod.

[0033] The technical solution adopted by the present application to solve the second technical problem is that the fan system has an air inlet facing the smoke inlet, and the upper edge of the smoke inlet is higher than the upper edge of the air inlet.

[0034] The oil guide plate comprises a first oil guide part, a second oil guide part, a third oil guide part and a fourth oil guide part, the first oil guide part extends from front to back, the second oil guide part extends downward from the rear end of the first oil guide part, the third oil guide part is arranged at the left end of the first oil guide part and the second oil guide part, the fourth oil guide part is arranged at the right end of the first oil guide part and the second oil guide part, the second oil guide part cooperates with the fan system, and the third oil guide part and the fourth oil guide part are inclined towards each other from front to back.

[0035] Since the oil guide parts on the two sides of the oil guide plate extend towards each other, the corresponding sides of the cabinet will also form a relative inclination, and the inclination angle of the third and fourth oil guide parts can be limited by the plane of the second oil guide part covering the air inlet of the fan system. In this way, the vortex area in the inner cavity surrounded by the oil guide plate can be reduced, the airflow from the outside can pass through the inner cavity surrounded by the oil guide plate more smoothly into the fan system, and the flow rate is gradually increased to improve the oil fume extraction effect of the range hood.

[0036] The technical scheme adopted by the present application to solve the third technical problem is that the oil guide plate comprises a first oil guide part and a second oil guide part, the first oil guide part extends from front to back, the second oil guide part extends downward from the rear end of the first oil guide part, and the second oil guide part cooperates with the fan system.

[0037] The first oil guide part comprises first and second folding edges arranged in front and back, and the first and second folding edges jointly form a V-shaped downward bend.

[0038] By making the top of the oil guide plate V-shaped, the oil at the top of the oil guide plate drips from the lowest point of the V shape, thereby eliminating the situation that the oil at the top of the oil guide plate falls from the smoke inlet to the cooking surface. When the whole machine is in a hanging state and is inclined forward, the oil will not be concentrated on the upper part of the smoke inlet due to the presence of the V shape, but will still drip from the lowest point of the V shape, thereby effectively solving the oil path problem of the range hood.

[0039] Further, the fan system has an air inlet facing the smoke inlet, and the extension line of the lower surface of the first folding edge reaches the highest point of the air inlet edge of the fan system. In this way, the first edge can better guide the oil fume into the fan system.

[0040] Further, to ensure that the oil still drips from the lowest point of the V shape even when the whole machine is in a hanging state and is inclined forward, the included angle between the first folding edge and the horizontal plane is α, and α≥3° is satisfied.

[0041] Preferably, to ensure that the oil dripping from the lowest point of the V shape will not drip through the smoke inlet, the range hood comprises a front plate, the smoke inlet is arranged on the front plate, the front plate comprises a lower panel below the lower edge of the smoke inlet, and the bending part of the first oil guide part is located within the outermost edge of the lower panel.

[0042] To further ensure the oil path, in the projection on the horizontal plane, the shortest distance between the bending part of the first oil guide part and the upper edge of the lower panel is d, and d≥10mm is satisfied.

[0043] Further, the oil guide plate comprises a first oil guide part and a second oil guide part, the first oil guide part extends from front to back, the second oil guide part extends downward from the rear end of the first oil guide part, and the second oil guide part cooperates with the fan system.

[0044] The included angle between the first oil guide part and the second oil guide part is β, and β≥90° is satisfied. In this way, the manufacture of the oil guide plate can be facilitated.

[0045] Further, the oil guide plate comprises a first oil guide part, a second oil guide part, a third oil guide part and a fourth oil guide part, the first oil guide part extends from front to back, the second oil guide part extends downward from the rear end of the first oil guide part, the third oil guide part is arranged at the left end of the first oil guide part and the second oil guide part, and the fourth oil guide part is arranged at the right end of the first oil guide part and the second oil guide part, the second oil guide part cooperates with the fan system, and each oil guide part encloses a cavity which is large in front and small at back. The design of the cavity of the oil guide plate which is large outside and small inside makes the high-frequency sound concentrate inside the cavity and the low-frequency sound protrude near the ear, so that the sound presented to the user is deeper, the sound quality of the whole machine is improved, and the user experience is increased.

[0046] Compared with the prior art, the advantages of the present application are that: by installing the push rod assembly of the movement mechanism on the oil guide plate, the problem of push rod failure caused by box deformation is avoided, and space is provided for avoiding the exposure of the push rod hinge of the movement mechanism in the oil way and the exposure of the push rod shear surface; and the problems of insufficient sheet metal strength and insufficient push rod placement space caused by the built-in push rod (such as fixed on the top of the box) are avoided; since the oil guide parts of the two sides of the oil guide plate extend obliquely towards each other, a relative inclination is also formed between the oil guide parts and the corresponding sides of the box, and the inclination angle of the third and fourth oil guide parts can be limited by the plane of the second oil guide part of the oil guide plate covering the air inlet of the fan system, thereby reducing the vortex area in the inner cavity enclosed by the oil guide plate, making the external airflow pass through the inner cavity enclosed by the oil guide plate into the fan system more smoothly, gradually increasing the flow rate, and improving the oil fume extraction effect of the range hood; by making the top of the oil guide plate V-shaped, the oil at the top of the oil guide plate drips from the lowest point of the V shape, thereby eliminating the situation that the oil at the top of the oil guide plate falls from the smoke inlet to the cooktop; when the whole machine is in a hanging state and is inclined forward, due to the existence of the V shape, the oil will not concentrate on the upper part of the smoke inlet, but will still drip from the lowest point of the V shape, thereby effectively solving the oil way problem of the range hood. BRIEF DESCRIPTION OF DRAWINGS

[0047] Fig. 1 is a schematic view of the closed state of the range hood of the embodiment of the present application;

[0048] Fig. 2 is a schematic view of the closed state of the hidden side plate of the range hood of the embodiment of the present application;

[0049] Fig. 3 is a sectional view of the closed state of the range hood of the embodiment of the present application;

[0050] Fig. 4 is a schematic view of the oil guide plate of the range hood of the embodiment of the present application (viewed from front to back);

[0051] Fig. 5 is a schematic view of the oil guide plate of the range hood of the embodiment of the present application (viewed from back to front);

[0052] Fig. 6 is a schematic view of the cooperation of the movement mechanism and the oil guide plate of the range hood of the embodiment of the present application;

[0053] Figure 7 is an exploded structural diagram of the oil guide plate, motion mechanism and fan system of the range hood according to an embodiment of the present invention;

[0054] Figure 8 is a schematic diagram of the open state of the range hood according to an embodiment of the present invention;

[0055] Figure 9 is a schematic diagram of the open state of the hidden side panel of the range hood according to an embodiment of the present invention;

[0056] Figure 10 is a schematic diagram of the flow field simulation of a range hood in the prior art. Detailed Implementation

[0057] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions.

[0058] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Since the embodiments disclosed in this invention can be arranged in different directions, these terms indicating direction are only for illustration and should not be regarded as limitations. For example, "upper" and "lower" are not necessarily limited to directions opposite to or consistent with the direction of gravity. In addition, features defined with "first" and "second" may explicitly or implicitly include one or more of such features.

[0059] Referring to Figures 1-9, a side-draft range hood includes a housing 1 and a fan system 2 disposed within the housing 1. The housing 1 is configured as a smoke hood, comprising a front panel 111, a rear panel 112, side panels 113, and a top panel 114. The front panel 111 and rear panel 112 are arranged at an interval, with the front panel 111 inclined relative to the rear panel 112. There are two side panels 113, one disposed between the left ends of the front panel 111 and rear panel 112, and the other disposed between the right ends of the front panel 111 and rear panel 112. The top panel 114 is disposed at the top of the aforementioned front panel 111, rear panel 112, and side panels 113. The fan system 2 (not fully shown in the figures) is disposed within the space enclosed by the front panel 111, rear panel 112, side panels 113, and top panel 114. The fan system 2 has an air inlet 21 facing the front panel 111.

[0060] The front plate 111 is provided with an air inlet 12, which is formed in the upper portion of the front plate 111 and is close to the top of the front plate 111. The portion of the front plate 111 above the upper edge of the air inlet 12 is an upper panel 1111, which can be vertically extended. The portion of the front plate 111 below the lower edge of the air inlet 12 is a lower panel 1112, which is inclined relative to the rear plate 112 and gradually inclines backward from top to bottom. In the normal installation state of the range hood, the rear plate 112 is vertically extended. The upper edge of the air inlet 12 is higher than the upper edge of the air inlet 21 of the fan system 2.

[0061] The range hood further comprises a baffle 3 for opening and closing the air inlet 12 and a movement mechanism for driving the baffle 3. In the present embodiment, the movement mechanism comprises a push rod assembly 41, a push rod bracket 42, a rotating shaft assembly 43 and a lock pin 44. The push rod assembly 41 comprises a motor 411, a push rod 412 and a housing 413. The motor 411 is used to drive the push rod 412 to extend and retract relative to the housing 413. The motor 411 is mounted on the housing 413, and the housing 413 is mounted on the push rod bracket 42. The push rod 412 is partially exposed to the outside of the housing 413. The end of the push rod 412 exposed to the outside of the housing 413 is connected through the lock pin 44 and the rotating shaft assembly 43, and the rotating shaft assembly 43 is connected with the baffle 3.

[0062] The rotating shaft assembly 43 comprises a hinge 431 and a support 432. The support 432 is fixed in the cabinet 1. The hinge 431 has three ends. The first end is connected with the push rod 412 (i.e. the output end of the push rod assembly 41) through the lock pin 44. The second end is rotationally connected with the support 432. The third end is fixed to the side of the baffle 3 facing the inside of the cabinet 1. The portion of the hinge 431 between the first end and the second end is kept in the cabinet 1, and the third end is exposed to the outside of the cabinet 1. The specific installation mode of the movement mechanism will be described in detail below.

[0063] The cabinet 1 is further provided with an oil guide plate 5. The oil guide plate 5 comprises a first oil guide portion 51, a second oil guide portion 52, a third oil guide portion 53 and a fourth oil guide portion 54. The first oil guide portion 51 extends from front to back. The second oil guide portion 52 extends downward and gradually backward from the rear end of the first oil guide portion 51. The third oil guide portion 53 is arranged at the left side end of the first oil guide portion 51 and the second oil guide portion 52. The fourth oil guide portion 54 is arranged at the right side end of the first oil guide portion 51 and the second oil guide portion 52. The second oil guide portion 52 is matched with the fan system 2, and the inclination angle thereof is consistent with that of the fan system 2. The second oil guide portion 52 is provided with a perforation 521 matched with the air inlet 21 of the fan system 2. The oil fume entering the cabinet 1 passes through the perforation 521 and enters the fan system 2. The fan system 2 is closely attached to the rear side of the oil guide plate 5.

[0064] The oil guiding portions enclose a cavity Q which is larger in front and smaller in back. Specifically, the left end of the first oil guiding portion 51 gradually inclines to the right from front to back, and the right end of the first oil guiding portion 51 gradually inclines to the left from front to back. The left end of the second oil guiding portion 52 gradually inclines to the right from top to bottom, and the right end of the second oil guiding portion 52 gradually inclines to the left from top to bottom. The front end of the third oil guiding portion 53 is connected to the front end of the side plate 13 on the left side of the cabinet 1, and the front end of the fourth oil guiding portion 54 is connected to the front end of the side plate 13 on the right side of the cabinet 1. The third oil guiding portion 53 and the fourth oil guiding portion 54 are substantially triangular. In addition, the third oil guiding portion 53 gradually inclines to the right from front to back, and the fourth oil guiding portion 54 gradually inclines to the right from front to back.

[0065] The inclination of the third oil guiding portion 53 and the fourth oil guiding portion 54 is limited so that the second oil guiding portion 52 can cover the air inlet 21 of the fan system 2, thereby reducing the vortex area in the inner cavity, especially the vortex at the wedge angle between the second oil guiding portion 52 and the lower panel 1112, making the airflow from the outside more smoothly pass through the cavity enclosed by the oil guiding plate 5 into the fan system 2, and gradually increasing the inner cavity cross-sectional flow rate, improving the oil fume extraction effect of the range hood. At the same time, the oil guiding plate 5 encloses an inner cavity which is small in the inner and large in the outer (the larger the closer to the front), which makes the high-frequency sound concentrated inside the cavity Q, and the low-frequency sound prominent near the human ear, making the sound exhibited to the user more deep, improving the sound quality of the whole machine, and increasing the user experience.

[0066] In order to facilitate processing, the included angle of the first oil guiding portion 51 and the second oil guiding portion 52 is β, and satisfies β≥90°, and the larger the better. In this embodiment, the included angle is the angle formed between the second folding edge 512 (to be described below) of the first oil guiding portion 51 and the second oil guiding portion 52.

[0067] The oil guiding plate 5 further comprises a mounting structure, which in this embodiment comprises a first mounting portion 55 and a second mounting portion 56, the first mounting portion 55 extends forward from the front end of the first oil guiding portion 51, and the second mounting portion 56 extends upward from the front end of the first mounting portion 55. The entire oil guiding plate 5 can be an integrally formed structure. The first mounting portion 55 is substantially horizontal, thereby providing a mounting for functional modules such as lighting devices, sensors, cameras, etc., and the second mounting portion 56 can be fixed with the upper panel 1111 above the smoke inlet 12, and the second mounting portion 56 is fixed to the back side of the upper panel 1111 facing the inside of the cabinet 1.

[0068] The oil guide plate 5 further comprises a clearance hole 57 formed on the first mounting portion 55 and the second mounting portion 56. The support 432 of the moving mechanism is fixed on the upper surface of the first mounting portion 55, and the push rod support 42 is fixed on the third oil guide portion 53 or the fourth oil guide portion 54 and located on the outer side of the oil guide plate 5. Here, the outer side refers to the side opposite to the side plate 13 of the cabinet 1, rather than the wall of the space enclosed by the oil guide plate 5. Since the third oil guide portion 53 and the fourth oil guide portion 54 are oppositely inclined, there is enough space between the third oil guide portion 53 or the fourth oil guide portion 54 and the corresponding side plate 113 to accommodate the moving mechanism. In the embodiment, the push rod support 42 is arranged on the fourth oil guide portion 54.

[0069] The hinge 431 comprises a first portion 4311 above the first mounting portion 55 and a second portion 4312 downwardly extending from the first mounting portion 55 through the clearance hole 57. The first and second ends of the hinge 431 are the two ends of the first portion 4311, and the second portion 4312 extends away from the first portion 4311 from the position between the two ends. Preferably, the cross section of the second portion 4312 (in the mounted state, the cross section is the plane parallel to the paper in FIG. 3, i.e. the vertical plane extending front to back) is in the shape of a sector of a circle, and the center of the circle is above the second portion 4312 when the smoke baffle 3 is in the open state. In this way, the hinge 431 does not need a large clearance hole 57 during movement, and the push rod 412 is hidden. The length of the first mounting portion 55 in the left-right direction is limited by the ability to accommodate the hinge 431. The periphery of the clearance hole 57 portion on the first mounting portion 55 is formed with a flange 571 extending upward to increase strength and prevent the clearance hole 57 from tearing the oil guide plate 5 due to the force of the push rod.

[0070] In order to facilitate the arrangement of the push rod support 42, the fourth oil guide portion 54 is formed with a triangular rib 58 protruding rearward thereon. The profiled edge 581 constituting the triangular rib 58 is rounded, which reduces local stress and facilitates molding. The oil guide plate 5 is provided with screws 59 at positions close to the upper and lower profiled edges 581 of the triangular rib 58, for increasing local rigidity.

[0071] Since the moving mechanism is arranged on the oil guide plate 5, the first oil guide part 51 of the oil guide plate 5 is in a V shape bent downward to enhance the strength of the first oil guide part 51 so that the oil guide plate 5 will not be deformed due to the push rod force. The first oil guide part 51 comprises a first bent edge 511 and a second bent edge 512 arranged in front and back, and the first bent edge 511 and the second bent edge 512 jointly form the V shape bent downward. Thus, in the hanging state, since the top of the oil guide plate 5 is in a V shape, the V-shaped first oil guide part 51 has a flow guiding effect, and the first bent edge 511 guides the airflow coming from the smoke inlet 12 to the air inlet 21 of the fan system 2, thereby improving the performance of the whole machine. Preferably, the extension line L of the lower surface of the first bent edge 511 reaches the highest point of the edge of the air inlet 21 of the fan system 2 (including the case where the fan system 2 is provided with an air inlet ring, at this time the highest point of the edge of the air inlet 21 is the highest point of the inner circumference of the air inlet ring for air supply). In addition, the longer the length of the first bent edge 511 in the front and back directions, the better the flow guiding effect.

[0072] The angle between the first bent edge 511 and the horizontal plane is α, and in the embodiment, preferably α = 5°, which ensures that the airflow can be guided to the air inlet 21 of the fan system 2. At the same time, considering that the maximum displacement position of the right side of the oil guide plate under the push rod force is on the upper part of the triangular pressing rib 58, the bent part of the first oil guide part 51 is preferably located above the triangular pressing rib 58, that is, the intersection position of the first bent edge 511 and the second bent edge 512 corresponds to the upper part of the triangular pressing rib 58, thereby making the best position of the strength of the oil guide plate 5 be the middle position of the first oil guide part 51 in the front and back directions.

[0073] Since the bent part of the first oil guide part 51 constitutes the lowest position of the whole first oil guide part 51, the oil stains on the first oil guide part 51 will drip down from the lowest position. Therefore, further, it is necessary to ensure that the lowest point of the first oil guide part 51 is within the outermost edge of the lower panel 1112, so that the oil on the top of the oil guide plate 5 drips from the lowest point of the V shape, thereby eliminating the situation that the oil on the top of the oil guide plate 5 falls from the smoke inlet 12 to the cooking bench; when the whole machine is in the hanging state and is inclined forward, due to the existence of the V shape, the oil will also not be concentrated on the upper part of the smoke inlet 12, but will still drip from the lowest point of the V shape, thereby well solving the oil path problem of the range hood.

[0074] Considering the oil dripping situation, preferably α ≥ 3°, and in the projection on the horizontal plane, the shortest distance between the bent part of the first oil guide part 51 and the upper edge of the lower panel 1112 (the upper edge of the lower panel 1112 towards the side of the box body 1) satisfies d ≥ 10 mm.

Claims

1. A range hood, comprising: a cabinet (1) having an inlet opening (12) formed on a front side thereof; an oil guide plate (5) arranged in the cabinet (1); a fan system (2) also arranged in the cabinet (1) and located at a rear side of the oil guide plate (5); a smoke baffle (3); and a movement mechanism for driving the smoke baffle (3) to open and close the inlet opening (12); characterized in that: the movement mechanism comprises a push rod assembly (41) and a push rod support (42), the push rod assembly (41) is mounted on the push rod support (42), and the push rod support (42) is fixed on a left side or a right side of the oil guide plate (5).

2. The hood according to claim 1, characterized in that: the oil guide plate (5) comprises a first oil guide portion (51), a second oil guide portion (52), a third oil guide portion (53) and a fourth oil guide portion (54), the first oil guide portion (51) extends from front to back, the second oil guide portion (52) extends downward from a rear end of the first oil guide portion (51), the third oil guide portion (53) is arranged at a left end of the first oil guide portion (51) and the second oil guide portion (52), the fourth oil guide portion (54) is arranged at a right end of the first oil guide portion (51) and the second oil guide portion (52), the second oil guide portion (52) cooperates with the fan system (2), and the push rod support (42) is arranged on an outer side of the third oil guide portion (53) or the fourth oil guide portion (54).

3. The hood according to claim 2, characterized in that: the third oil guide portion (53) or the fourth oil guide portion (54) of the oil guide plate (5) on which the push rod support (42) is arranged is inclined from front to back to the opposite oil guide portion.

4. The hood according to claim 2, characterized in that: the third oil guide portion (53) or the fourth oil guide portion (54) of the oil guide plate (5) on which the push rod support (42) is arranged is formed with a triangular pressing rib (58), and the triangular pressing rib (58) is formed by the corresponding oil guide portion protruding backward.

5. The hood according to claim 4, characterized in that: a pressing profile edge (581) constituting an outline of the triangular pressing rib (58) is rounded.

6. The hood according to claim 4, characterized in that: the oil guide plate (5) is provided with a screw (59) at a position close to an upper part and a lower part of the triangular pressing rib (58).

7. The hood according to claim 2, characterized in that: the first oil guide portion (51) is in a V shape bent downward.

8. The hood according to claim 7, characterized in that: the bent part of the first oil guide portion (51) corresponds to an upper part of a mounting position of the push rod support (42).

9. The hood according to claim 2, characterized in that: the movement mechanism further comprises a rotating shaft assembly (43), the rotating shaft assembly (43) comprises a hinge (431), the hinge (431) comprises a first part (4311) located in the cabinet (1) and a second part (4312) extending out of the cabinet (1), one end of the first part (4311) is connected with an output end of the push rod assembly (41), the other end of the first part (4311) is rotatably supported in the cabinet (1), the second part (4312) extends away from the first part (4311) from a part between the two ends of the first part (4311), and the second part (4312) is fixed to a back side of the smoke baffle (3) facing into the cabinet (1).

10. The hood according to claim 9, characterized in that: the cabinet (1) comprises a front plate (111), the inlet opening (12) is arranged on the front plate (111), and the front plate (111) comprises an upper panel (1111) located above an upper edge of the inlet opening (12). The oil guide plate (5) further comprises a mounting structure arranged on the front side of the first oil guide part (51) and fixed with the upper panel (1111), and a clearance hole (57) is formed in the mounting structure, and the second part (4312) passes through the clearance hole (57).

11. The hood according to claim 10, characterized in that: The second part (4312) has a cross section in the shape of a fan ring.

12. The hood according to claim 10, characterized in that: The mounting structure comprises a first mounting part (55) and a second mounting part (56), the first mounting part (55) extends forward from the front end of the first oil guide part (51), the second mounting part (56) extends upward from the front end of the first mounting part (55), the first mounting part (55) is used for mounting a functional module, the second mounting part (56) is used for being fixed with the upper panel (1111), and the first part (4311) of the hinge (431) is located above the first mounting part (55). The pivot shaft assembly (43) further comprises a support (432) fixed on the upper surface of the first mounting part (55), and the first part (4311) of the hinge (431) is rotatably supported in the cabinet (1) through the rotation connection with the support (432).

13. The hood according to claim 12, characterized in that: The periphery of the clearance hole (57) part on the first mounting part (55) is formed with a flange edge (571) extending upward.

14. The hood according to claim 1, characterized in that: The fan system (2) has an air inlet (21) facing the smoke inlet (12), and the upper edge of the smoke inlet (12) is higher than the upper edge of the air inlet (21). The oil guide plate (5) comprises a first oil guide part (51), a second oil guide part (52), a third oil guide part (53) and a fourth oil guide part (54), the first oil guide part (51) extends from front to back, the second oil guide part (52) extends downward from the rear end of the first oil guide part (51), the third oil guide part (53) is arranged at the left end of the first oil guide part (51) and the second oil guide part (52), the fourth oil guide part (54) is arranged at the right end of the first oil guide part (51) and the second oil guide part (52), the second oil guide part (52) cooperates with the fan system (2), and the third oil guide part (53) and the fourth oil guide part (54) are inclined towards each other from front to back.

15. The hood according to claim 1, characterized in that: The oil guide plate (5) comprises a first oil guide part (51) and a second oil guide part (52), the first oil guide part (51) extends from front to back, the second oil guide part (52) extends downward from the rear end of the first oil guide part (51), and the second oil guide part (52) cooperates with the fan system (2). The first oil guide part (51) comprises a first folded edge (511) and a second folded edge (512) arranged in front and back, and the first folded edge (511) and the second folded edge (512) jointly form a downwardly bent V shape.

16. The hood according to claim 15, characterized in that: The fan system (2) has an air inlet (21) facing the smoke inlet (12), and the lower surface of the first folded edge (511) reaches the highest point of the air inlet (21) edge of the fan system (2).

17. The hood according to claim 15, characterized in that: The included angle between the first folded edge (511) and the horizontal plane is α, and α≥3° is satisfied.

18. The hood according to claim 15, characterized in that: The range hood comprises a front plate (111), the smoke inlet (12) is arranged on the front plate (111), the front plate (111) comprises a lower plate (1112) below the lower edge of the smoke inlet (12), and the bending part of the first oil guide part (51) is located within the outermost edge of the lower plate (1112).

19. The hood according to claim 18, characterized in that: In the projection on the horizontal plane, the shortest distance between the bending part of the first oil guide part (51) and the upper edge of the lower plate (1112) is d, and d≥10 mm is satisfied.

20. The hood according to claim 1, characterized in that: The oil guide plate (5) comprises a first oil guide part (51) and a second oil guide part (52), the first oil guide part (51) extends from front to back, the second oil guide part (52) extends downward from the rear end of the first oil guide part (51), and the second oil guide part (52) cooperates with the fan system (2). The included angle between the first oil guide part (51) and the second oil guide part (52) is β, and β≥90° is satisfied.

21. The hood according to claim 1, characterized in that: The oil guide plate (5) comprises a first oil guide part (51), a second oil guide part (52), a third oil guide part (53) and a fourth oil guide part (54), the first oil guide part (51) extends from front to back, the second oil guide part (52) extends downward from the rear end of the first oil guide part (51), the third oil guide part (53) is arranged at the left end of the first oil guide part (51) and the second oil guide part (52), the fourth oil guide part (54) is arranged at the right end of the first oil guide part (51) and the second oil guide part (52), the second oil guide part (52) cooperates with the fan system (2), and each oil guide part surrounds a cavity (Q) which is large in front and small at back.

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