CN214501361U - Smoke guide plate and range hood with smoke guide plate - Google Patents

Abstract

The utility model discloses a smoke deflector and applied range hood that has this smoke deflector, including the protruding curb plate that forms the board and be located protruding formation board periphery in the middle of being located for smoke deflector wholly is by the edge to middle bellied shape gradually, its characterized in that: at least one section of edge of the whole smoke guide plate is arc-shaped, and the arc-shaped edge is in smooth transition with other edges of the adjacent smoke guide plate. Compared with the prior art, the utility model has the advantages of: the arc design of the smoke guide plate can reduce the structure which obstructs the flow of the airflow and improve the inflow condition of the subsequent air inlet; the smoke guide plate is at least in the shape of an arc at the front end, so that the oil smoke can be prevented from escaping from the front end.

Description

Smoke guide plate and range hood with smoke guide plate

Technical Field

The utility model relates to an oil smoke guiding device, especially a smoke deflector to and applied range hood that has this smoke deflector.

Background

The range hood has become one of the indispensable kitchen household electrical appliances in modern families. The range hood works by utilizing the fluid dynamics principle, sucks and exhausts oil smoke through a centrifugal fan arranged in the range hood, and filters partial grease particles by using a filter screen. The centrifugal fan comprises a volute, an impeller arranged in the volute and a motor driving the impeller to rotate. When the impeller rotates, negative pressure suction is generated in the center of the fan, oil smoke below the range hood is sucked into the fan, accelerated by the fan and then collected and guided by the volute to be discharged out of a room.

The range hood generally comprises a top suction type range hood and a side suction type range hood, and the top suction type range hood has more and more extensive application due to the advantages of neatness, lightness, small occupied space and the like. The top-suction type range hood generally includes a fume collecting hood, a fan housing located on the fume collecting hood, and a volute, an impeller, and a motor for driving the impeller are installed in the fan housing.

In order to solve the problem of negative pressure concentration of the traditional top-suction type range hood, a smoke guide plate structure is arranged under an air inlet and guides a negative pressure area to diffuse towards the periphery, and the smoke is guided to uniformly flow by utilizing the wall attachment effect to avoid the flow channeling of the smoke. However, the smoke guide plate is a flat plate, and the flat plate structure has a smooth surface, so that the wall attachment effect is weakened, oil smoke is easy to separate from the flat plate surface to flow to form a channeling flow, and the oil smoke absorption effect is reduced. Meanwhile, the channeling oil smoke is interfered with each other, and noise is easy to generate.

Based on this, the application No. 201410419676.4 discloses a ceiling type range hood with a smoke guide plate, wherein the lower surface of the smoke guide plate is wavy, which increases the roughness of the lower surface of the smoke guide plate and enhances the wall attachment effect to a certain extent. However, the grooves with the depth of 0.5mm to 10mm are formed on the lower surface of the smoke guide plate, so that a great number of local vortexes are easily formed when the oil smoke bypasses the grooves, the surrounding flow field is disturbed, and the noise is increased. And the existence of the grooves easily causes the oil smoke to condense on the surface thereof to form oil drops which are difficult to clean, and the condensed oil drops can drop into the pot, so that the food is unsanitary.

In addition, the applicant's chinese patent application No. 201310627395.3 discloses a diffusion drainage device with a middle height, and all included angles are formed between the peripheral side plates and the middle plane, so as to solve the problem of oil smoke escaping from the front end of the range hood to a certain extent. Because of the existence of the obvious sharp-corner-like structure (straight edge-arc-straight edge transition structure, arc R is less than or equal to 30) at the front end of the smoke guide plate (diffusion drainage device), airflow flows around in a diffusion manner when flowing through the front end, channeling is easily formed on the inner surface of the smoke guide plate, energy of the channeling is enhanced after the channeling is accelerated through the acceleration channel, two local vortices with larger range and stronger energy are formed by interaction at the middle plane, the inflow condition of the air inlet is worsened, and the actual oil smoke absorption effect is influenced; in addition, the smoke guide plate adopts a fixing mode of four buckles, and airflow easily forms a karman vortex street when flowing through the buckles, so that the flow field of an air inlet is disturbed, and the actual oil smoke absorption effect is further influenced.

The existing range hoods with smoke guide plates have high overall noise level after the smoke guide plates are added, that is, although the negative pressure area of the existing range hoods with smoke guide plates is enlarged to a certain extent, the oil smoke absorption effect is improved, but the overall noise level of the existing range hoods with smoke guide plates is high, which affects the user experience.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the first technical problem that will solve is not enough to above-mentioned prior art existence, provides a smoke deflector, reduces the structure that hinders the air current and flow, improves the incoming flow condition.

The second technical problem to be solved in the present invention is to provide a range hood with the above smoke guide plate.

The utility model provides a technical scheme that above-mentioned first technical problem adopted does: the utility model provides a smoke guide plate, includes the protruding curb plate that forms the board and be located and protruding formation board periphery that is located the centre for smoke guide plate wholly is by the edge to middle bellied shape gradually, its characterized in that: at least one section of edge of the whole smoke guide plate is arc-shaped, and the arc-shaped edge is in smooth transition with other edges of the adjacent smoke guide plate.

In order to accelerate the oil smoke better when the oil smoke passes through the smoke guide plate, an included angle alpha is formed between the convex forming plate and the side plate, and alpha is an acute angle smaller than 20 degrees.

In order to avoid the grease from dripping from the edge of the smoke guide plate, the outer edge of the side plate is bent to form a flanging, and the bending direction of the flanging is consistent with the protruding direction of the smoke guide plate.

In order to accelerate the oil smoke better when the oil smoke passes through the smoke guide plate and avoid forming vortex, the height of the bulge of the smoke guide plate is h, and h is greater than the height of the flanging and is less than 5 times of the height of the flanging.

The utility model provides a technical scheme that above-mentioned second technical problem adopted does: the utility model provides an use range hood as above fume deflector which characterized in that: the smoke guide plate is at least in the shape of a circular arc at the front end.

In order to collect grease on the smoke guide plate, the smoke guide plate is gradually inclined downwards from front to back, a strip-shaped oil cup is arranged on the back side of the smoke guide plate, and the oil cup and the smoke guide plate are integrally formed or are arranged in a split mode.

In order to facilitate the oil fume to enter the range hood body in an accelerating manner, the range hood comprises a range hood body, an air inlet is formed in the range hood body, the smoke guide plate is arranged below the air inlet, and a horn-shaped annular accelerating channel is formed between the smoke guide plate and the air inlet.

For avoiding the mounting structure of leading the cigarette board to cause the disturbance to the air current, it is connected with range hood body that the leading cigarette board passes through the connecting piece, the connecting piece has three groups, and three groups of connecting pieces are triangular distribution, and wherein a set of connecting piece setting is in the centre of leading the cigarette board, and two sets of connecting pieces setting are in the rear side of leading the cigarette board in addition.

Preferably, in order to further reduce the influence on the air flow and avoid forming a karman vortex street to disturb the flow field, one group of connecting pieces are arranged at the position corresponding to the center of the air inlet, and the other two groups of connecting pieces are arranged behind the air inlet and are arranged at intervals left and right.

For the installation of connecting piece, air intake department is provided with the filter screen, can dismantle with the filter screen with the connecting piece that the air intake center corresponds and be connected.

In order to facilitate guiding, containing and collecting of oil smoke which cannot be discharged in time and is more suitable for a double-hole stove or a multi-hole stove, the smoke guide plate is provided with two smoke guide plates which are arranged at left and right intervals.

Compared with the prior art, the utility model has the advantages of: the arc design of the smoke guide plate can reduce the structure which obstructs the flow of the airflow and improve the inflow condition of the subsequent air inlet; the smoke guide plate is at least in the shape of an arc at the front end, so that the oil smoke can be prevented from escaping from the front end; the whole inward convex structure of the smoke guide plate and the range hood body form an annular accelerating channel together, so that the range hood has a stronger oil fume suction effect, is not easy to condense grease, and is convenient to clean and collect the grease; the connecting piece utilizes a triangular fixing mode based on a triangular stability principle, a front-end circular arc structure design and the triangular fixing mode based on the triangular stability principle, so that disturbance to a flow field is reduced, incoming flow conditions of an air inlet can be effectively improved, oil smoke is prevented from escaping from the front end, meanwhile, the formation of a noise source is blocked, and the noise level of the whole machine is favorably reduced; the smoke guide plate is detachably connected, so that the smoke guide plate is convenient to detach and clean; the smoke guide plates distributed form a common negative pressure area in the middle of the smoke collection cavity, and are used for guiding, containing and collecting oil smoke which cannot be discharged in time, and the use of a double-hole stove and a multi-hole stove user is facilitated.

Drawings

Fig. 1 is a schematic view of a range hood according to an embodiment of the present invention;

fig. 2 is a schematic view of the range hood according to the embodiment of the present invention (the smoke guide plate is opened);

FIG. 3 is a side view of a first embodiment of the smoke guide of the present invention;

FIG. 4 is a schematic structural view of a first embodiment of the smoke guide plate of the present invention;

fig. 5 is a schematic view of the hidden smoke guide plate of the range hood according to the embodiment of the present invention;

FIG. 6 is a schematic structural view of a second embodiment of the smoke guide plate of the present invention;

fig. 7 is a schematic structural view of a third embodiment of the smoke guide plate of the present invention;

fig. 8 is a schematic structural view of a fourth embodiment of the smoke guide plate of the present invention;

fig. 9 is a schematic structural view of a fifth embodiment of the smoke guide plate of the present invention.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar functions.

In the description of the present invention, it is to 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," "circumferential," and the like are used in a generic and descriptive sense only and not for purposes of limitation, as the disclosed embodiments of the invention may be oriented in different directions and the directional terms are intended to be illustrative and should not be construed as limiting, such as "upper" and "lower" are not necessarily limited to directions opposite to or coincident with the direction of gravity. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

Example one

Referring to fig. 1, 2 and 5, a thin (horizontal) range hood comprises a box body 1, an oil guide plate 2 and a smoke guide plate 3 arranged below the oil guide plate 2, wherein a parallel double-fan system is arranged in the box body 1, an air inlet 21 is arranged on the oil guide plate 2, the oil guide plate 2 is connected with the box body 1 and the fan system through screws, and a smoke collection cavity 22 with a preset height is formed under the oil guide plate 2. Alternatively, the range hood can also be a common ceiling-mounted range hood. The box body 1, the oil guide plate 2 and the fan system form a range hood body.

Preferably, the air inlets 21 are two in left and right spaced arrangement, the smoke guide plates 3 are also two and located below the air inlets 21, and each smoke guide plate 3 is disposed opposite to one of the air inlets 21 to form a distributed arrangement. The rear end of the smoke guide plate 3 is provided with a strip-shaped oil cup 31, and the smoke guide plate 3 gradually inclines downwards from front to back, so that grease accumulated on the upper surface of the smoke guide plate 3 can flow into the oil cup 31. In the present embodiment, the smoke guide plate 3 and the oil cup 31 are integrally formed, and the rear end of the smoke guide plate 3 is inclined rearward and gradually downward to constitute the front side wall of the oil cup 31. The oil cup 31 may be formed by drawing the plate.

Referring to fig. 3 and 4, the smoke guide plate 3 gradually protrudes upwards from the edge to the middle to form an integral inward protruding structure, and a trumpet-shaped annular accelerating channel 32 is formed between the periphery of the smoke guide plate 3 and the air inlet 21.

In the present embodiment, the whole smoke guide plate 3 is integrally formed by stretching, and includes a protrusion forming plate 33 located in the middle and a side plate 34 located at the periphery of the protrusion forming plate 33, wherein the protrusion forming plate 33 is a flat plate, the outline of which is consistent with the outline of the whole smoke guide plate 3, and the protrusion forming plate 33 is obtained by reducing the whole smoke guide plate 3 in a certain ratio, preferably, by scaling in equal ratio using golden section ratio. The height of the projection forming plate 33 (i.e., the height of the projection of the smoke guide plate 3) is h, which is the vertical distance between the projection forming plate 33 and the plane in which the outer edge of each side plate 34 lies. The protrusion-forming plate 33 and the side plate 34 form an included angle α, preferably, α is an acute angle smaller than 20 °, and more preferably, α has a value ranging from 7.5 ° to 10.5 °. h and alpha can influence the flow field distribution and the flow velocity at the periphery of the smoke guide plate 3, and further influence the oil smoke absorption effect, and h is determined when the size of the smoke guide plate 3 is determined by setting the value range of alpha, so that the oil smoke is accelerated well when passing.

Therefore, the fume guide plate 3 and the air inlet 21 jointly form the horn-shaped annular accelerating channel 32, so that the oil fume can flow more smoothly, and the mutual interference between the oil fume and the generation of the vortex on the inner surface of the fume guide plate 3 are reduced. Furthermore, the probability of generating pneumatic noise due to interaction of air flow is reduced, and the functions of rectifying oil smoke and improving inflow conditions of the air inlet are achieved. Meanwhile, due to the existence of the annular accelerating channel 32, the negative pressure area originally concentrated near the air inlet 21 is diffused to the periphery of the smoke guide plate 3, and the smoke collecting range is expanded. And the smoke guide plates 3 distributed in a distributed way can form two annular accelerating channels at the lower part of the box body 1, and a public negative pressure area is formed in the middle of the smoke collection cavity 22 and used for guiding, containing and collecting the oil smoke which is not discharged in time, so that the use of a double-hole stove and a multi-hole stove user is facilitated.

The front end of the whole smoke guide plate 3 is in a forward protruding arc shape, so that sharp corners or traditional transition of straight sides-arc (arc radius is less than or equal to 30, namely arc chamfer in the general meaning) -straight sides is avoided, interference of the corners to air flow is reduced, the air flow is guided to pass through the annular accelerating channel 32 more smoothly, formation of local vortex is reduced, and influence of deterioration of incoming flow conditions of the air inlet on actual oil smoke suction effect is prevented. Further, in order to facilitate processing and manufacturing, the circular arc-shaped structure is designed by adopting a standard curve equation of a circle. Furthermore, the arcs at the two sides and the front end of the smoke guide plate 3 are in smooth transition, the whole smoke guide plate is in a trapezoid-like shape, the front part is narrow, the rear part is wide, and preferably, the radius R of the arc is more than or equal to 90 mm. The arc may be formed by the edge splicing of at least two side plates 34.

The outer edge of the side plate 34 is bent upward to form a flange 35, and the presence of the flange 35 enables the upper surface of the smoke guide plate 3 to form a space capable of storing grease so as to prevent the grease from dropping from the edge of the smoke guide plate 3. Preferably, h is less than 5 times the height of the cuff 35 and is not less than the height of the cuff 35, and more preferably, h is 2 times the height of the cuff 35. Therefore, the oil smoke can better enter the fan system along the side plate 34 in an accelerating way after passing through the flanging 35, and the vortex is prevented from being formed on the upper surface of the smoke guide plate 3.

The smoke guide plate 3 is fixedly connected with the oil guide plate 2 through a connecting piece 4. In order to further reduce the influence of unnecessary structures on the inflow conditions of the air inlet 21, the smoke guide plate 3 is connected with the oil guide plate 2 in a triangular fixing mode, wherein one group of connecting pieces 4 is located in the middle of the smoke guide plate 3 (the middle is not strictly required to be located in the center of the smoke guide plate 3, but cannot be close to the edge), and two groups of connecting pieces 4 are located at the position, close to the rear side, of the smoke guide plate 3. In this embodiment, one set of the connecting elements 4 is a claw 41 and a buckle 42, and the other two sets of the connecting elements 4 are a hook 43 and a hook seat 44. Wherein, the clamping combination of the claw 41 and the buckle 42 is positioned at the front side, and the hooking combination of the hook 43 and the hook seat 43 is positioned at the rear side.

The filter screen 23 is arranged at the air inlet 21 of the oil guide plate 2, the buckle 42 is arranged on the filter screen 23, preferably, the center of the filter screen 23, and the claw 41 is arranged in the middle of the upper surface of the smoke guide plate 3 and is positioned right below the center of the filter screen 23, the area belongs to the center of the air inlet 21, the air flow is less, the flow speed is low, the influence of the arrangement of the connecting piece 4 on the air flow is small, and a karman vortex street and a flow field are not easily formed. The oil smoke gas flow is concentrated in one circle at the periphery of the air inlet 21, and the middle part is less; the air flow at the left side, the right side, the front side and the rear side of the air inlet 21 is concentrated, the flow speed is high, the air flow at the middle part of the air inlet 21 is low, and the flow speed is low. The jaw 41 may be fixed to the smoke guide 3 by a screw. Further, the relative positions of the two sets of connecting pieces 4 on the rear side are determined based on the triangle stability principle, the two hooks 43 are arranged on the rear side of the upper surface of the smoke guide plate 3 and are positioned on the front side of the oil cup 31, the two hooks 43 are arranged at intervals left and right, and the hook seats 44 are positioned behind the air inlet 21. Each hook 43 may be fixed to the smoke guide 3 by a screw. The three connecting pieces 4 may form an isosceles triangle or an equilateral triangle.

The specific engaging structure of the pawl 41 and the catch 42, and the engaging structure of the hook 43 and the hook seat 44 can all adopt the prior art, such as the patents of the applicant mentioned in the background.

Compared with the traditional smoke guide plate connected by four groups of connecting pieces, as can be seen from fig. 7 to 9, the four groups of connecting pieces are all located on the necessary path for airflow to flow, and when the airflow flows through the connecting pieces, a karman vortex street is easily formed behind the connecting pieces, airflow flow is disturbed, incoming flow conditions of the air inlet are influenced, and a local noise source is easily formed. Interference is more likely to occur especially when the connector is large in size. The utility model discloses in, reduce into two (two sets of connecting pieces 4 of rear side) through four connecting pieces that will influence the air intake incoming flow condition originally, and because jack catch 41 is located under filter screen 23, belong to air intake 21 middle part region, the air current is less, the velocity of flow is lower, the unnecessary way of following of non-air current, it is less to the flow field disturbance, avoided the influence that produces to the range hood performance to a certain extent, the range hood's oil absorption cigarette effect has been improved, be of value to and reduce complete machine noise level.

When the range hood works, the fan system is started, a local negative pressure area is formed at the air inlet 21 of the oil guide plate 2, oil smoke is sucked to move upwards, a wall attachment effect is formed on the lower surface of the oil smoke guide plate 3 in the rising process of the oil smoke, and the oil smoke flows uniformly along the lower wall surface of the oil smoke guide plate 3. When the oil smoke passes through the trumpet-shaped annular accelerating channel 32 formed by the smoke guide plate 3 and the oil guide plate air inlet 21, the oil smoke is guided to flow along the upper surface of the smoke guide plate 3 in an accelerating way, and the negative pressure area is diffused to the upper surface and the edge of the whole smoke guide plate 3, so that the pressure distribution at the lower part of the range hood is greatly improved. The design of the circular arc structure at the front end of the smoke guide plate 3 and the triangular fixing mode based on the triangular stability principle effectively reduce unnecessary structures blocking the flow of oil smoke, prevent the oil smoke from escaping from the front end, reduce the disturbance of a convection field, and further contribute to reducing the noise level of the whole machine.

Meanwhile, the smoke guide plate 3 is easy to detach due to the connection mode of clamping and hanging, and oil stains are not easy to condense due to the integral inward convex (upward convex) structure, so that the smoke guide plate is convenient for a user to clean. In addition, the smoke guide plates 3 arranged in a distributed manner can effectively utilize the common negative pressure area between the two flow guide plates to guide, contain and collect the oil smoke from the middle area of the smoke collection cavity 22 to enter the annular accelerating channel 32, so that the oil smoke suction efficiency is improved.

Example two

Referring to fig. 6, the difference between the first embodiment and the second embodiment is that the arc shape of the front end of the smoke guide plate 3 is a semicircle formed by a semicircular side plate 34.

EXAMPLE III

Referring to fig. 7, the difference between the present embodiment and the second embodiment is that the smoke guide plate 3 is designed to have a semicircular structure at the front and rear portions, and the side plates 34 are respectively disposed at the left and right sides between the front and rear semicircular side plates 34 to form transition sections, so as to further eliminate the influence of corners on the flow field. The oil cup 31 and the smoke guide plate 3 are arranged separately.

Example four

Referring to fig. 8, the present embodiment is different from the third embodiment in that the smoke guide plate 3 is circular as a whole, and only one side plate 34 is annularly surrounded on the outer periphery of the protrusion forming plate 33, and the transition section between the front and rear portions is omitted. The oil cup 31 and the smoke guide plate 3 are arranged separately.

EXAMPLE five

Referring to fig. 9, in the present embodiment, the difference from the fourth embodiment is that the smoke guide plate 3 further has a side plate 34 on the circular rear side, the side plate 34 is parallel to the projection forming plate 33, i.e., an inward projection structure is not formed, and the oil cup 31 is integrally formed at the rear end of the side plate 34.

In addition, the smoke guide plate 3 has various shapes, fixing modes and distribution modes, but the smoke guide plate only needs to conform to the overall inward convex and front end circular arc structure design, distributed arrangement, a triangular fixing mode based on the triangular stability principle and the like.

Claims (11)

1. The utility model provides a smoke guide plate, includes the protruding shape board (33) that is located the centre and is located curb plate (34) of protruding shape board (33) periphery for smoke guide plate is whole to be the shape of gradually raising by the edge to the centre, its characterized in that: at least one section of edge of the whole smoke guide plate is arc-shaped, and the arc-shaped edge is in smooth transition with other edges of the adjacent smoke guide plate.

2. The smoke guide plate of claim 1, wherein: the protrusion forming plate (33) and the side plate (34) form an included angle alpha, and alpha is an acute angle smaller than 20 degrees.

3. The smoke guide plate of claim 1, wherein: the outer edge of the side plate (34) is bent to form a flanging (35), and the bending direction of the flanging (35) is consistent with the protruding direction of the smoke guide plate.

4. The smoke guide plate of claim 3, wherein: the height of the protrusion of the smoke guide plate is h, and h is greater than the height of the turned edge (35) and is less than 5 times of the height of the turned edge (35).

5. A range hood applying the smoke guide plate as set forth in any one of claims 1 to 4, characterized in that: the smoke guide plate is at least in the shape of a circular arc at the front end.

6. The range hood of claim 5, wherein: the smoke guide plate is gradually inclined downwards from front to back, a strip-shaped oil cup (31) is arranged on the back side of the smoke guide plate, and the oil cup (31) and the smoke guide plate are integrally formed or are arranged in a split mode.

7. The range hood of claim 5, wherein: the range hood comprises a range hood body, an air inlet (21) is formed in the range hood body, the smoke guide plate is arranged below the air inlet (21), and a horn-shaped annular acceleration channel (32) is formed between the smoke guide plate and the air inlet (21).

8. The range hood of claim 7, wherein: the smoke guide plate is connected with the range hood body through the connecting piece (4), the connecting piece (4) is provided with three groups, the three groups of connecting pieces (4) are distributed in a triangular mode, one group of connecting pieces (4) are arranged in the middle of the smoke guide plate, and the other two groups of connecting pieces are arranged on the rear side of the smoke guide plate.

9. The range hood of claim 8, wherein: one group of connecting pieces (4) are arranged at the position corresponding to the center of the air inlet (21), and the other two groups of connecting pieces (4) are arranged behind the air inlet (21) and are arranged at left and right intervals.

10. The range hood of claim 9, wherein: air intake (21) department is provided with filter screen (23), can dismantle with filter screen (23) with connecting piece (4) that air intake (21) center corresponds and be connected.

11. The range hood according to any one of claims 7 to 10, wherein: the smoke guide plate is provided with two smoke guide plates which are arranged at intervals from left to right.

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