CN104848276B - oil smoke removing device - Google Patents

Abstract

A fume removal device is provided, wherein left and right vertical plates are respectively combined at the lower part of the left and right sides of an air hood, wherein the front end of the left vertical plate is bent to extend to form a first vertical plate and a left deflection plate, and the upper part of the free end of the left deflection plate is bent to the right to form a left top plate; the front end of the right vertical plate is bent to extend to form a second vertical plate and a right deflection plate, and the upper part of the free end of the right deflection plate is bent to the left to form a right top plate. The bottom surface of the air hood is further provided with long left and right blowing grooves, which are parallel to the top edges of the left and right top plates, respectively, and are located at the rear ends of the top edges, respectively. In this way, when the air suction port on the bottom surface of the air hood is used to draw air upwards and the left and right blowing grooves are used to blow air downwards, the air vortex entering the bottom of the air hood is kept away from the opening at the front end of the bottom of the air hood, and pollutants are prevented from leaking out.

Description

Oil fume removal device

technical field

The invention relates to an oil fume removal device, especially a device that can effectively prevent oil fume pollutants from leaking, and is suitable for factories, laboratories and kitchens.

Background technique

Traditional range hoods are not much different from top-suction hoods generally used in workplaces. The flange of this type of range hood may be flat, arched down canopy or box-shaped, and the suction port may be round, square, rectangular or long. When this type of range hood is inhaling, air and pollutants will flow into the bottom of the hood from the periphery of the flange, enter the suction port, and then be discharged to the outside through the duct. Among them, the air flow velocity near the suction port is relatively high, and the air flow velocity far away from the suction port will decrease rapidly as the distance from the suction port increases. Therefore, within a very short distance below the suction port, the upward speed of the air has become very small, so that the upward suction force is insufficient, and it is very easy to be affected by turbulent airflow from people walking, fan or air conditioner operation, etc. Let oil fumes or pollutants escape with the flow of disturbed airflow.

When the above-mentioned range hood is used in an environment that generates high-temperature gas, although a large buoyancy effect will be generated due to the high temperature of the furnace, the speed of the upward airflow will increase, but the turbulent diffusion and expansion effect caused by the high temperature , it will make the fume pollutants easily dissipate from the front, rear and sides of the range hood. Therefore, general range hoods often increase the suction force to increase the air intake. However, this method will not only increase noise and waste energy, but also cannot completely eliminate the phenomenon of leakage.

In view of the above problems, a common improvement method is to add baffles on the left and right sides and the rear of the range hood a as shown in Figure 8 . However, in actual use, the boundary layer of the airflow is easy to separate at the front edges of the two side plates b to generate large recirculation bubbles c, which will roll the soot pollution to the vicinity of the front edges of the two side plates b, And leak through molecular diffusion and turbulent diffusion, or be swept out to the external environment by the influence of environmental disturbance airflow. At the junction of the flange d of the range hood a and the side plate b, due to the influence of the three-dimensional effect, complex three-dimensional eddies and strong turbulence will be generated, and pollutants will also be rolled to the flange d of the range hood a Leakage is caused by the junction with side plate b. Therefore, simply adding side panels b to the left and right sides of the range hood a cannot fully achieve the effect of preventing leakage.

Contents of the invention

In view of this, in order to provide a structure different from the prior art, and to improve the shortcomings of the above structure, the inventor has accumulated many years of experience and continuous research and development, so the present invention is produced.

An object of the present invention is to provide a kind of lampblack removing device that is respectively provided with first and second vertical boards and left and right deflection boards at the front ends of left and right vertical boards, so that the side of existing range hood can be solved. The front edge of the plate is prone to the problem of large return bubbles, and the large return bubbles can be kept away from near the front edge of the side plate to prevent leakage of pollutants.

Another object of the present invention is to provide a left and right deflecting plate at the front end of the left and right vertical plate respectively, a left and a right top plate are respectively provided at the upper part of the left and right deflecting plate, and inhalation The bottom surface of the hood is equipped with left and right blowing grooves for oil fume removal devices, so as to solve the problem of three-dimensional vortex and strong turbulent flow at the junction of the flange and side plate of the existing range hood, and keep the vortex away from the oil fume Exclude the opening at the front of the unit to prevent leakage of contaminants.

In order to achieve the purpose of the above invention, a kind of oil fume removal device provided by the present invention includes a suction hood, a left vertical board and a right vertical board. Wherein, the bottom surface of the suction hood is provided with at least one air suction port, and the suction port is connected with a suction device for upward suction; the left and right vertical plates are respectively combined under the left side and the right side of the suction hood. , an accommodating space is formed between the suction hood, the left vertical plate and the right vertical plate, the side or side of the suction hood, the left vertical plate and the right vertical plate is defined as the front end, and the side that is opposite and away from the user Or one side is defined as the rear end, when the user faces the suction hood, the left vertical board and the right vertical board, the left side and the right side are defined. Its main technical feature is that the front end of the left vertical board bends and extends to the right rear A left deflecting plate, the left deflecting plate is fixed upright in the accommodation space, and a first angle is formed between the left deflecting plate and the left side plate; and the side of the left deflecting plate away from the front end of the left vertical plate is defined as The free end of the left deflecting plate, the upper part of the free end of the left deflecting plate bends a left top plate to the right in a direction away from the left vertical plate; and the front end of the right vertical plate bends and extends a right deflecting plate towards the left rear, The right deflector is fixed upright in the accommodation space, and a second angle is formed between the right deflector and the right side plate; end, the upper part of the free end of the right deflection plate bends a right top plate to the left in the direction away from the right vertical plate, and there is a first interval between the right top plate and the left top plate; Air-blowing and elongated left and right blowing grooves respectively, the left blowing groove is parallel to the top edge of the left top plate and is located at the rear end of the top edge, and the right blowing groove is parallel to the top edge of the right top plate And it is located at the rear end of the top edge, and the left blowing groove and the right blowing groove are arranged in a straight line and have a second interval, and the distance of the second interval is shorter than the distance of the first interval.

During implementation, the present invention further includes a first vertical board and a second vertical board, the first vertical board is bent and extended from the front end of the left vertical board to the left, and the second vertical board is bent and extended from the front end of the right vertical board to the right .

During implementation, the angle openings of the first included angle and the second included angle are respectively facing backward, and the angles of the first included angle and the second included angle are respectively bounded between 20 degrees and 70 degrees.

During implementation, the present invention further comprises a first guide plate and a second guide plate, wherein, the first guide plate is bent to the left by the free end of the left deflection plate in a direction close to the left vertical plate, and the second guide plate The guide plate is bent to the right in the direction close to the right vertical plate by the free end of the right deflecting plate.

During implementation, the left top plate and the right top plate are symmetrical to each other, and the end of the left top plate extending to the right does not exceed the left edge of the air suction port, and the end of the right top plate extending to the left does not exceed the right edge of the air suction port.

During implementation, the left top plate and the right top plate are respectively inverted triangular plates.

In order to further understand the present invention, preferred embodiments are given below, and with reference to the accompanying drawings and figure numbers, the specific components of the present invention and the effects achieved are described in detail as follows.

Description of drawings

FIG. 1 is a schematic perspective view of a preferred embodiment of the present invention.

FIG. 2 is a schematic top view of a preferred embodiment of the present invention.

Fig. 3 is a schematic front view of a preferred embodiment of the present invention.

4 to 7 are diagrams of the usage state of the preferred embodiment of the present invention.

Fig. 8 is a diagram of the state of use of the conventional range hood.

【Symbol Description】

Oil fume removal device 1 Suction hood 2

Suction port 21 Exhaust port 22

Left blowing slot 23 Right blowing slot 24

Accommodating space 25 left vertical board 3

First vertical plate 31 Left deflector plate 32

Left top board 33 top edge 331,431

First guide plate 34 Right vertical plate 4

Second vertical plate 41 Right deflection plate 42

Right top plate 43 Second guide plate 44

First interval W1 Second interval W2

The first included angle θ1 The second included angle θ2

Small reflux bubbles A, A' Vortex B, B', C, C'

Range hood a Side panel b

large reflux bubble c flange d.

Detailed ways

Please refer to Figures 1 to 3, which is a preferred embodiment of the oil fume removal device 1 of the present invention, including a suction hood 2, a left vertical plate 3, a first vertical plate 31, a left deflector plate 32, A left top plate 33 , a first guide plate 34 , a right vertical plate 4 , a second vertical plate 41 , a right deflection plate 42 , a right top plate 43 and a second guide plate 44 . Wherein, the side or side of the suction hood 2, the left vertical board 3 and the right vertical board 4 close to the user is defined as the front end, and the side or side opposite and far away from the user is defined as the rear end. 2. When the left vertical board 3 and the right vertical board 4, define the left side and the right side.

The bottom surface of the suction hood 2 is provided with an air suction port 21 with an opening facing downwards. The air suction port 21 is roughly rectangular in shape. During implementation, the air suction port 21 at the bottom of the suction hood 2 can also be set as one or more than two, and be circular, square or rectangular. And the top of suction hood 2 has an exhaust port 22, and exhaust port 22 is connected with the suction device such as blower, so that when the suction device operates, upwards is sucked by the suction port 22, and discharges outdoor. In addition, the bottom surface of the suction cover 2 is provided with respectively strip-shaped left blowing groove 23 and right blowing groove 24, and the left and right blowing grooves (23, 24) are connected with exhaust devices such as cross-flow fans to Blow down. Left blowing groove 23 is parallel with the top edge 331 of left top plate 33 and is positioned at the rear end of this top edge 331, and right blowing groove 24 is parallel with the top edge 431 of right top plate 43 and is positioned at the rear end of this top edge 431, and left The blowing groove 23 and the right blowing groove 24 are arranged in a straight line and have a second interval W2.

The left vertical plate 3 and the right vertical plate 4 are respectively a rectangular plate, and the left vertical plate 3 and the right vertical plate 4 are respectively combined under the left side and the right side of the suction hood 2. An accommodating space 25 is formed between the vertical board 3 and the right vertical board 4 , and an opening is formed in front of the accommodating space 25 .

The first vertical plate 31 , the left deflecting plate 32 , the second vertical plate 41 and the right deflecting plate 42 are respectively an upright rectangular plate. Wherein, the first vertical plate 31 is bent and extended from the front end of the left vertical plate 3 to the left; Bending and extending to the right rear, and standing upright in the accommodating space 25, at this time, a first included angle θ1 is formed between the left deflecting plate 32 and the left vertical plate 3, and the angle of the first included angle θ1 is between Between 20 degrees and 70 degrees. The right deflector 42 is symmetrical to the left deflector 32, and the right deflector 42 is bent and extended from the front end of the right vertical plate 4 to the left rear, and is fixed upright in the accommodating space 25. The right deflector 42 A second included angle θ2 is formed with the right vertical plate 4, and the angle of the first included angle θ2 is between 20 degrees and 70 degrees.

Above-mentioned left deflecting plate 32 is defined as the free end of left deflecting plate 32 on one side away from the front end of left vertical plate 3, and the free end of right deflecting plate 42 is defined on one side away from the front end of right vertical plate 4. And this left top plate 33 is the inverted triangular plate that bends to the right in the direction away from the left vertical plate 3 from the top of the free end of the left deflecting plate 32, and this right top plate 43 is by the top of the free end of the right deflecting plate 42 away from The direction of the right vertical plate 4 bends to the left inverted triangular plate, and the left top plate 33 and the right top plate 43 are mutually symmetrical, and the length that the left top plate 33 extends to the right direction does not exceed the left side edge of the air inlet 22, and the right top plate 43 The length extending in the left direction does not exceed the right edge of the air inlet 22 . There is a first gap W1 between the right top plate 43 and the left top plate 33 , and the distance of the first gap W1 is longer than the distance of the second gap W2 . During implementation, the left top plate 33 and the right top plate 43 can also be curved, rectangular or other shapes but also have the function of guiding the flow. And the first guide plate 34 is by the free end of left deflector plate 32 to the vertical plate that bends to the left in the direction close to left vertical plate 3, and the second guide plate 44 is by the free end of right deflector plate 42. The vertical plate that the direction of right vertical plate 4 bends to the right.

During implementation, the above-mentioned first vertical plate 31, left deflector plate 32, left top plate 33 and first guide plate 34 are combined by separate sheets, and the first vertical plate 31, left deflector plate 32, left top plate 33 and the first guide plate 34 can also be integrally formed, and the second vertical plate 41, the right deflection plate 42, the right top plate 43 and the second guide plate 44 can also be combined by independent sheets, or for One piece.

Thereby, as shown in FIG. 4 , when the air extraction device is in operation, oil fume pollutants can be sucked upward through the air extraction port 22 . In the air extraction process, when the air outside the left vertical plate 3 and the right vertical plate 4 is sucked into the accommodating space 25 through the opening below the suction cover 2 near the front ends of the left vertical plate 3 and the right vertical plate 4 respectively, the air flow Flow along the first vertical plate 31, the left deflector 32, the second vertical plate 41, and the right deflector 42 respectively, and the airflow boundary layer is separated at the front edges of the left deflector 32 and the right deflector 42, respectively. A small reflow bubble (A, A') is formed. At this time, let the lengths of the left deflector 32 and the right deflector 42 be longer than the length of the small reflow bubble (A, A'), then the boundary layer of the airflow is left deflected The rear section of the flap 32 and the right deflector 42 will flow backward against the left deflector 32 and the right deflector 42, and finally leave the rear edge of the left deflector 32 and the right deflector 42. , and form a vortex (B, B') respectively. These two vortices (B, B') are respectively formed behind the left deflector plate 32 and the right deflector plate 42, and are quite far from the opening below the suction hood 2, so oil fume pollutants cannot pass through the vortex ( B, B') Return along the original entry path to avoid leakage of soot pollutants to the outside.

As shown in FIG. 5 , it is a state where the air flow passes through the left top plate 33 and the right top plate 43 respectively. Among them, when the air flow enters the accommodating space 25 from the junction of the suction hood 2 and the left and right vertical plates (3, 4) respectively, due to the guidance of the left top plate 33 and the right top plate 43, in FIG. The reflow bubbles formed by the three-dimensional effect will disappear, and the airflow will flow along the left top plate 33 and the right top plate 43 respectively, and finally leave at the rear edge of the left top plate 33 and the right top plate 43, and form a vortex respectively (C, C'), this vortex (C, C') has moved away from the opening below the suction hood 2.

As shown in Figures 6 and 7, since the left and right blowing slots (23, 24) are respectively located at the rear ends of the left and right top plates (33, 43), and the distance of the second interval W2 is shorter than the distance of the first interval W1 Therefore, the vortices (C, C') formed respectively by the rear edge of the left top plate 33 and the right top plate 43 will be guided by the air blown downward by the left and right blowing slots (23, 24), Make it enter the air suction port 21, so as to avoid oil fume pollutants from leaking outward through the junction of the suction hood 2 and the left and right vertical plates (3, 4). In addition, due to the guidance of the first guide plate 34 and the second guide plate 44, the air blown downward by the left and right blowing slots (23, 24) can more effectively achieve the guiding effect.

Therefore, the present invention has the following advantages:

1. In the present invention, first and second vertical plates and left and right deflection plates are respectively provided at the front ends of the left and right vertical plates, so that the large return bubbles entering the accommodation space below the suction hood can be kept away from the Near the front edge of the side plate, to prevent the airflow from flowing back along the original entry path, and to avoid the leakage of soot pollutants to the outside.

2. In the present invention, left and right deflecting plates are respectively provided on the front ends of the left and right vertical plates, left and right top plates are respectively provided on the top of the free ends of the left and right deflecting plates, and the bottom surface of the suction hood is provided with The left and right air blowing grooves can effectively eliminate the three-dimensional eddy current and strong turbulence generated by the junction of the flange of the oil fume removal device and the side plate, so that the vortex that is far away from the front opening of the oil fume removal device is generated and guided Into the air inlet, thereby effectively preventing oil fume pollutants from leaking out from the original entry path.

To sum up, according to the content disclosed above, the present invention can clearly achieve the expected purpose, provide a kind of oil fume removal device that can effectively reduce the emission of oil fume pollutants, which is of great value in industrial application, and the invention patent is proposed according to the law Application.

Claims (6)

1. a kind of oil smoke removing apparatus, including an air-suction cover, a left risers and a right risers, the bottom surface of the air-suction cover is equipped at least One bleeding point, which connects an air extractor, for being evacuated upwards；The left and right riser is respectively in connection in a left side for the air-suction cover Side and the lower section of right side, form an accommodating space between the air-suction cover, left risers and right risers；Wherein, the air-suction cover, a left side Riser and right risers are defined as close to one side of user or on one side front end, it is reversed and far from user one side or define on one side For rear end, when user is towards air-suction cover, left risers and right risers, left side and right side are defined, it is characterised in that：

The front end of the left risers bends one left avertence folded plate of extension to right back, which is vertically fixed to the accommodating space In, and one first angle is formed between the left avertence folded plate and the left plate；And the left avertence folded plate far from the left risers front end one Boundary is set to the free end of the left avertence folded plate, and the top of the free end of the left avertence folded plate is curved to the right with the direction far from the left risers A left roof is rolled over, which is up-side down triangle plate；

The front end of the right risers bends one right avertence folded plate of extension to left back, which is vertically fixed to the accommodating space In, and one second angle is formed between the right avertence folded plate and the right plate；And the right avertence folded plate far from the right risers front end one Boundary is set to the free end of the right avertence folded plate, and the top of the free end of the right avertence folded plate is curved to the left with the direction far from the right risers A right top plate is rolled over, which is up-side down triangle plate, and has one first interval between the right top plate and the left roof；And

One first riser and one second riser, first riser bend extension to the left by the front end of the left risers, second riser Extension is bent to the right by the front end of the right risers；

Wherein, the bottom surface of the air-suction cover, which is equipped with, blows and separately down respectively in a left blowing groove of strip and a right air blowing Slot, the left blowing groove is parallel with the top margin of the left roof and is located at the rear end of the top margin, the top of the right blowing groove and the right top plate Side is parallel and is located at the rear end of the top margin, and the left blowing groove and the right blowing groove are linearly arranged and had between one second Every the distance at second interval is shorter than the distance at first interval.

2. oil smoke removing apparatus according to claim 1, which is characterized in that the angle of first angle is open backwards, and Angle circle of first angle is between 20 degree to 70 degree.

3. oil smoke removing apparatus according to claim 2, which is characterized in that further include one first guide plate, this first is led Corbel back slab is bent to the left by the free end of the left avertence folded plate with approaching the direction of the left risers.

4. oil smoke removing apparatus according to claim 1, which is characterized in that the angle of second angle is open backwards, and Angle circle of second angle is between 20 degree to 70 degree.

5. oil smoke removing apparatus according to claim 4, which is characterized in that further include one second guide plate, this second is led Corbel back slab is bent to the right by the free end of the right avertence folded plate with approaching the direction of the right risers.

6. oil smoke removing apparatus according to claim 1, which is characterized in that the left roof and the right top plate are symmetrical, And one end of left roof side direction extension to the right is no more than the left side edge of the bleeding point, side direction extends the right top plate to the left One end be no more than the bleeding point right side edge.