TWI426220B - An exhaust device with a flap plate - Google Patents

Description

Exhaust device with deflecting plate

The invention relates to an exhaust device with a deflecting plate, in particular to a deflecting plate for guiding the airflow in the operating cabinet, thereby preventing leakage of pollutants, and is suitable for use in factories, laboratory exhaust cabinets and commercial kitchens. The exhaust fume cabinet.

The conventional exhaust cabinet is pumped by means of an open shutter at the upper end of the gas cabinet, and a baffle with a specially designed opening is erected vertically behind the cabinet, and the harmful gas in the cabinet is passed through the air suction device and the duct. The opening of the upper shutter and the opening of the deflector behind the cabinet are extracted. When using the exhaust cabinet, the suction device must be operated to perform the pumping action. At this time, the gas cabinet door cannot be completely closed or an air inlet must be reserved under the threshold to prevent the suction device from being unable to be supplied with air. The motor idling or even burning. When in use, the gas cabinet door often needs to be opened to an appropriate height to facilitate the operator to put his hand into the cabinet for experimental operation. However, when the door of the conventional exhaust cabinet is in the open state, the harmful substances in the cabinet are easily leaked from the periphery of the cabinet due to the basic reasons of gas dynamics, and the operator performs the door opening and closing action and stands on the opening. Leakage is especially serious when operating in front of the cabinet and when there are disturbances or people moving around. The main cause of the leakage is that the vortex and strong turbulence are easily formed around the door of the cabinet and the operator's chest, which leads to the exchange of mass and momentum between the inside and outside of the cabinet. Therefore, the leakage of pollutants in the cabinet is almost inevitable. Unfortunately, there are very few exhaust cabinets that do not require door opening and closing. The operator must also stand in front of the open cabinet to operate the experiment. Very few exhaust cabinets are placed in the uninterrupted airflow and no personnel. In the environment of walking. Therefore, laboratories, factories, and buildings that use traditional exhaust cabinets are usually smelled. The sour taste of the school is actually caused by the continuous release of pollutants from the cabinet. Users and people around them are used to it, causing long-term chemical pollution.

Therefore, as shown in Figures 13 and 14, the relatively inclined double air curtain exhaust cabinet of the publication No. M375855 mainly utilizes an inclined air curtain to solve the above problem of the conventional exhaust cabinet leakage. The system has an opening formed on the front and rear sides of the operation cabinet a, and a blowing end (b, b1) and two blowing ends (b) on the front and rear sides of the bottom plate of the operation cabinet a. And b1) respectively ejecting the air jet upwards in an inclined and opposite direction, and a suction hood c is disposed in the upper space of the bottom plate, and the suction hood c is provided with a suction end c1, a suction end c1 and two blowing ends ( b, b1) are parallel, and the pumping end c1 is located directly above the two blowing ends (b, b1). Therefore, when the suction end c1 is pumped, and the two blowing ends (b, b1) are blown, two oblique air curtains (d, d1) flowing from bottom to top are formed to exclude being surrounded by two obliques. Contaminants between the air curtains.

The structure of the above-mentioned double air curtain type exhaust cabinet has an open space for the operation of the front and rear ends of the operation cabinet, and the left and right sides of the operation cabinet are closed facades to block harmful gas leakage. . In actual use, both ends of the elongated blowing end (b, b1) must be separated from the left and right side plates (e, e1) by a certain gap (f, f1) for qi. However, the left and right side plates (e, e1) are closed façades, and when the air enters the gap between the two ends of the blowing end (b, b1) and the left and right side plates (e, e1), respectively. According to the experimental results, unstable vortex will be generated in the cabinet, and part of the airflow will flow out through the above two gaps, and the harmful gas leakage cannot be completely blocked.

In view of this, in order to improve the above-mentioned disadvantages, the exhaust device having the deflecting plate can effectively reduce the dissipation of contaminants to ensure the safety of use, and the creator has accumulated many years of experience and continuous research and development improvements, and the present invention is produced. .

The main object of the present invention is to provide an exhaust device having a deflecting plate by the bottom of the suction hood The section is provided with a narrow and long suction port, and has a structure of left and right deflecting plates in the accommodating space below the operation cabinet, which can effectively eliminate high temperature soot and prevent soot leakage.

A secondary object of the present invention is to provide an exhaust device having a deflecting plate, which is provided with an elongated blowing end on the front side of the bottom plate of the operating cabinet, and the first and second complements on the left and right sides of the elongated blowing end. The air space is provided with a structure of left and right deflecting plates, which can effectively block the airflow in the operating cabinet to prevent leakage of pollutants.

Still another object of the present invention is to provide an exhaust device having a deflecting plate, which is provided with a deflector at the front end of the left and right side plates of the operation cabinet, and a guide portion at the bottom of the front plate.俾 Allows air to smoothly enter the cabinet and reduce the size of the recirculation zone to reduce the chance of contaminant leakage.

For the purpose of the above invention, the exhaust device having the deflecting plate of the present invention comprises an operating cabinet, a left deflecting plate and a right deflecting plate. The operating cabinet includes a suction hood, a bottom plate, a left side plate, a right side plate and a rear plate, and an enclosure space is formed around the frame, and an opening is formed in front of the operation cabinet, and a suction end is provided at the bottom of the suction hood. The air end is formed with an elongated suction port with an opening facing downward, the elongated suction port is parallel with the rear plate, and the suction end is connected to the air suction device to pump upward; the left deflection plate is deflected relative to the left side plate. The erecting is fixed in the accommodating space to form a first angle between the left deflecting plate and the left side plate; and the right deflecting plate is symmetrical to the left deflecting plate, and the right deflecting plate is opposite to the right side plate The oblique manner is erected and fixed in the accommodating space to form a second angle between the right deflecting plate and the right side plate, thereby guiding the airflow in the operating cabinet and preventing leakage.

In implementation, the front end of the left deflecting plate abuts against the right side surface of the left side plate, and the front end of the right deflecting plate abuts against the left side surface of the right side plate, and the angle between the first angle and the second angle is oriented backward. board.

In implementation, the bottom of the front end of the suction hood is provided with a curved first guiding portion, and the top of the front end of the bottom plate is provided with a curved second guiding portion. In addition, the front end of the left side panel of the operation cabinet is provided with a curved first The deflector, the front end of the right side panel of the operation cabinet is provided with a curved second deflector for guiding the airflow into the accommodating space.

In implementation, the front side of the bottom plate is provided with an elongated blowing end, and the elongated blowing end is formed with an elongated blowing port whose opening is inclined upward, and the air jet is sprayed in a direction inclined to operate the rear plate of the cabinet or vertically upward; A first air supply space is formed between the left end and the left side plate of the air end, and a second air supply space is formed between the right end of the narrow air blowing end and the right side plate, and the narrow air blowing port is parallel with the narrow air suction port for the air suction device During operation, a nearly two-dimensional oblique air curtain is formed between the narrow suction end and the elongated air blowing end.

The venting device with the deflecting plate provided by the invention may also include an operating cabinet, front and rear left deflecting plates, and front and rear right deflecting plates. The operation cabinet includes a suction cover, a bottom plate, a left side plate and a right side plate, and an accommodation space is formed in the frame, and an opening is formed in the front side and the rear side of the operation cabinet, and a suction end and a suction end are arranged at the bottom of the suction cover. Forming an elongated suction port with an opening facing downward, the elongated suction port is perpendicular to the left and right side plates, and the suction end is connected to the air suction device to pump upward; the front and rear left deflection plates are respectively inclined with respect to the left side plate The method is fixed upright in the accommodating space, so that the front and rear left deflecting plates respectively form a first angle with the left side plate; and the front right deflecting plate is symmetrical with the front left deflecting plate, and the rear right side is biased. The folding plate is symmetrical with the rear left deflecting plate, and the front and rear right deflecting plates are respectively erected and fixed in the accommodating space in a manner inclined with respect to the right side plate, so that the front and rear right deflecting plates are respectively respectively and the right side A second angle is formed between the plates.

In order to facilitate a more in-depth understanding of the present invention, it is described in detail later:

1‧‧‧Exhaust device with deflecting plate

2‧‧‧ operation cabinet

21‧‧‧ suction hood

211‧‧‧ pumping end

212‧‧‧Exhaust port

213‧‧‧Exhaust port

214‧‧‧Wind box

215‧‧‧Exhaust device

216‧‧‧floor

217‧‧‧Blocking frame

218‧‧ ‧ collecting box

22‧‧‧floor

221‧‧‧Blowing end

222‧‧‧First air supply space

223‧‧‧Second air supply space

224‧‧‧Blowing port

225‧‧‧Blowers

226‧‧‧Second guidance

23‧‧‧left side panel

231‧‧‧First deflector

24‧‧‧right board

241‧‧‧Second deflector

25‧‧‧ front board

251, 254‧‧ ‧ openings

252‧‧‧First Guidance

253‧‧‧Blowing device

255‧‧‧active door

26‧‧‧ Back panel

27‧‧‧ accommodating space

29‧‧‧Lockers

3‧‧‧Left deflector

θ 1‧‧‧ first angle

31, 32‧‧‧ front and rear left deflecting plates

4‧‧‧ Right deflecting plate

θ 2‧‧‧second angle

41, 42‧‧‧ front and rear right deflecting plates

8‧‧‧Air curtain

9‧‧‧heating equipment

A‧‧‧ operation cabinet

b, b1‧‧‧ blowing end

C‧‧‧ suction hood

C1‧‧‧ pumping end

d, d1‧‧‧ air curtain

e, e1‧‧‧ left and right side panels

f, f1‧‧‧ gap

Figure 1 is a schematic cross-sectional view of the first embodiment of the present invention.

Figure 2 is a side cross-sectional view showing the first embodiment of the present invention.

Figure 3 is a schematic cross-sectional view of the first embodiment of the present invention.

3A and 3B are schematic cross-sectional views showing another shape of the suction hood of the present invention.

Figures 4 and 5 are diagrams showing the state of use of the first embodiment of the creation.

Figure 6 is a side cross-sectional view showing a second embodiment of the present invention.

Figure 6A is a side cross-sectional view of the creation of the movable cabinet door.

Figure 7 is a top cross-sectional view of the second embodiment of the present invention.

Figures 8 to 10 are diagrams showing the state of use of the second embodiment of the present invention.

Fig. 11 is a view showing the state of use of the third embodiment of the present creation.

Figure 11A is a side cross-sectional view showing the blowing device at the bottom of the movable door of the creation.

Figure 12 is a schematic plan cross-sectional view showing a fourth embodiment of the present invention.

Figure 13 is a schematic cross-sectional view of a conventional air curtain exhaust cabinet.

Figure 14 is a side cross-sectional view of a conventional air curtain exhaust cabinet.

Please refer to the first embodiment of the present invention, which is a first embodiment of the venting device 1 having a deflecting plate, comprising an operating cabinet 2, a left deflecting plate 3 and a right deflecting plate 4.

The operation cabinet 2 is substantially rectangular parallelepiped, and a storage cabinet 29 with legs is arranged below to support the operation cabinet 2 and store the objects. The operation cabinet 2 includes a suction hood 21, a bottom plate 22 and a left side plate. 23, a right side plate 24 and a rear plate 26, after the plates are combined, an accommodation space 27 is formed inside the operation cabinet 2, and an opening 251 is formed below the front end of the suction cover 21. The bottom of the front end of the suction hood 21 is provided with a curved first guiding portion 252, and the top of the front end of the bottom plate 22 is provided with a curved second guiding portion 226, and the front end of the left side plate 23 in the operating cabinet 2 A curved first deflector 231 and a curved second deflector 241 are respectively disposed at the front end of the right side plate 24 to reduce the degree of vortex and disturbance when air is drawn into the opening 251. In the implementation, the first guiding portion 252, the second guiding portion 226, the first deflector 231 and the second deflector 241 may be a quarter radius of a large radius, or may have a large radius of curvature. The curved surface can also achieve the effect of guiding air.

The bottom of the suction hood 21 is provided with a suction end 211, and the suction end 211 is formed with an opening facing downward. The air suction port 212 has a substantially elongated rectangular shape, and the long end of the elongated air suction port 212 is parallel to the rear plate 26. The exhaust hood 21 is provided with a plurality of exhaust ports 213, and each of the exhaust ports 213 is connected to a wind collecting box 214. The air collecting box 214 is connected to an air extracting device 215 for operating when the air extracting device 215 is operated. The narrow suction end 211 is evacuated and the air in the operating cabinet 2 is directed upward. When implemented, the aspirator 215 is a fan, blower or other extractable fluid machine. In addition, a liquid blocking frame 217 is disposed on the surface of the bottom plate 216 of the suction hood 21, and the liquid blocking frame 217 is protruded upward from the plate surface of the bottom plate 216, and is surrounded by the narrow suction port 212. A liquid collecting box 218 is disposed below the rear end of the bottom surface of the bottom plate 216 of the suction hood 21, and the liquid collecting box 218 may be disposed below the front end of the bottom surface of the bottom plate 216 or below the side.

In practice, the suction hood 21 may also be a substantially L-shaped housing, and as shown in FIG. 3A, the elongated suction port 212 faces downward at an oblique angle; or as shown in FIG. 3B, the elongated shape The suction port 212 is oriented away from the rear plate 26.

The left and right deflecting plates (3, 4) are respectively a rectangular vertical plate, wherein the left deflecting plate 3 is erected and fixed in the accommodating space 27 in a manner of being skewed relative to the left side plate 23, and the The front end of the left deflecting plate 3 abuts against the right side surface of the left side plate 23 such that a first angle θ1 is formed between the left deflecting plate 3 and the left side plate 23, and the angle of the first angle θ 1 is opened toward the rear plate. 26. The right deflecting plate 4 is symmetrical to the left deflecting plate 3, and the right deflecting plate 4 is vertically erected and fixed in the accommodating space 27 with respect to the right side plate 24, and the right deflecting plate 4 is The front end abuts against the left side surface of the right side plate 24 such that a second angle θ 2 is formed between the right deflecting plate 4 and the right side plate 24, and the angle of the second angle θ 2 is opened toward the rear plate 26.

Thereby, as shown in Figures 4 and 5, when the object or facility on the work surface 22 is a heating device 9 that generates high-temperature soot, such as a heating furnace or a heating plate, the high-temperature soot is acted upon by the buoyancy of the high-temperature gas. , so that the soot can rise. When the air extracting device 215 is in operation, the soot is sucked up through the air suction port 212, and the outside air in front of the operation cabinet 2 is passed through the opening 251 below the front end of the air suction cover 21. The air supply is performed, and the left deflecting plate 3 and the right deflecting plate 4 are used to guide the air flow to form a stable vortex pair that abuts each other as shown in FIG. 4, and the oil smoke is stably brought to the upper suction port 212. Discharged outside. Wherein, when the airflow flows on the right side of the left side panel 23 of the operation cabinet 2 and the left side of the right side panel 24, the air entering the operation cabinet 2 can be blocked due to the blocking and guiding of the left and right deflecting plates (3, 4). It will no longer flow back along the path that the original opening 251 enters, and the high temperature soot can be prevented from leaking outward.

Please refer to FIG. 6 and FIG. 7 , which is a second embodiment of the venting device 1 having a deflecting plate, which is different from the first embodiment in that a front side of the front end of the operating cabinet 2 is further provided. The plate 25 is formed below the front plate 25, and the first guiding portion 252 is a semicircular horizontal bar formed on the inner side of the bottom of the front plate 25. In the implementation, as shown in FIG. 6A, the outer portion of the front panel 25 overlaps a movable cabinet door 255, and the first guiding portion 252 is formed on the inner side of the bottom of the movable cabinet door 255, and the movable cabinet door The 255 is free to slide up and down with respect to the front panel 25 to control the opening of the movable cabinet door 255. In addition, the front side of the bottom plate 22 of the operation cabinet 2 is provided with a narrow air blowing end 221, and a first air supply space 222 is formed between the left end of the elongated air blowing end 221 and the left side plate 23, and the narrow air blowing end 221 is formed. A second air supply space 223 is formed between the right end and the right side plate 24, and the elongated air blowing end 221 is formed with an elongated air blowing port 224 which is parallel to the elongated air suction port 212. In addition, the elongated blowing end 221 is in communication with a blower 225 to allow the blowing port 224 to blow a two-dimensional air jet vertically upward through the action of the blower 225. In practice, the air blowing port 224 may also blow a two-dimensional air jet upward in the direction of the rear plate 26 of the operating cabinet 2; the air blower 225 may also be mechanically replaced by a cross flow fan or other fluid.

Thereby, as shown in FIGS. 8 to 10, when the air extracting device 215 and the air blower 225 are operated in synchronization, the air jet is ejected upward from the air blowing port 224, and the air jet is sucked by the air extracting port 212 to allow the air to pass through the first air supply space 222. And the second air supply space 223 is used for qi, and the left deflecting plate 3 and the right deflecting plate 4 are used to guide the airflow, so that a narrow air blowing port 224 and the elongated air extracting port 212 are formed. The two-dimensional oblique air curtain 8 will surround the diagonal air curtain 8, the rear plate 26 of the operation cabinet 2, and the left and right sides. The contaminants between the plates (23, 24) are stably carried by the airflow into the upper suction hood and are discharged outward through the wind collecting box 214.

Please refer to FIG. 11 , which is a third embodiment of the venting device 1 having a deflecting plate, wherein the bottom of the front plate 25 is provided with an elongated air blowing device 253 to Blowing, so as to block high temperature fumes or other pollutants from leaking out. In the implementation, the air blowing device 253 can also be set to two, and are respectively disposed at the two ends of the bottom of the front plate 25. As shown in FIG. 11A, when the outer portion of the front panel 25 overlaps a movable cabinet door 255, the air blowing means 253 is attached to the bottom of the movable cabinet door 255. In addition, FIG. 12 is a fourth embodiment of the venting device 1 having a deflecting plate, wherein an opening (251, 254) is formed in the front side and the rear side of the operating cabinet 2, that is, the operating cabinet 2 before and after, the accommodating space 27 is provided with front and rear left deflecting plates (31, 32) which are inclined with respect to the left side plate 23, and front and rear right deflecting plates which are skewed with respect to the right side plate 24. (41, 42), the front and rear left deflecting plates (31, 32) respectively form a first angle θ1 with the left side plate 23, and the front and rear right deflecting plates (41, 42) respectively and the right side A second angle θ 2 is formed between the plates, and the front right deflecting plate 41 and the front left deflecting plate 31 are bilaterally symmetrical, and the rear right deflecting plate 42 and the rear left deflecting plate 32 are bilaterally symmetrical. Thereby, the high temperature fume or other contaminants can be blocked from leaking from the front or the rear of the operation cabinet 2, and the user can be experimented or cooked at the same time before or behind the operation cabinet 2.

Therefore, compared with the traditional exhaust cabinet and the air curtain exhaust cabinet, this creation has the following advantages:

1. The left and right deflecting plates of the present invention can not only guide the air for qi, but also prevent the air entering the operating cabinet from flowing back, and can effectively guide the airflow in the operating cabinet, so that the pollutants can be Effectively eliminated to reduce the amount of pollutants leaked.

2. The first deflector, the second deflector, the first guiding portion and the second guiding portion of the present invention can smoothly guide the air to reduce the large backflow generated when the air is sucked into the opening, so In one way, it is effective to prevent backflow from taking out fumes or contaminants from the opening.

In summary, according to the content disclosed above, this creation can achieve the intended purpose of creation, providing An exhaust device capable of effectively reducing the dissipation of pollutants to ensure the safe use of a deflecting plate, which is of great practical value, and submits an invention patent application according to law.

The above is a specific embodiment of the present invention and the technical means used therein, and many changes and modifications can be derived therefrom according to the disclosure or teachings herein, and the equivalent changes made according to the concept of the present invention are produced. The role shall not be considered to be within the technical scope of this creation, and shall be preceded by Chen Ming.

1‧‧‧Exhaust device with deflecting plate

2‧‧‧ operation cabinet

22‧‧‧floor

23‧‧‧left side panel

231‧‧‧First deflector

24‧‧‧right board

241‧‧‧Second deflector

251‧‧‧ openings

26‧‧‧ Back panel

27‧‧‧ accommodating space

3‧‧‧Left deflector

θ 1‧‧‧ first angle

4‧‧‧ Right deflecting plate

θ 2‧‧‧second angle

Claims (6)

An venting device having a deflecting plate, comprising: an operating cabinet comprising a suction hood, a bottom plate, a left side plate, a right side plate and a rear plate, and surrounding the frame to form an accommodating space, the operation cabinet An opening is formed in the front side, and a bottom end of the suction hood is provided with a suction end, and the suction end is formed with an elongated suction opening with an opening facing downward, the elongated suction port is parallel with the rear plate, and the suction end is connected with a An air suction device for upward pumping, wherein a bottom portion of the front end of the air suction hood is provided with an arc-shaped first guiding portion, and a top portion of the front end of the bottom plate is provided with an arc-shaped second guiding portion; The folding plate is erected and fixed in the accommodating space so as to be skewed relative to the left side plate so as to form a first angle between the left deflecting plate and the left side plate; and a right deflecting plate symmetrical to the left side The folding plate is erected and fixed in the accommodating space so as to be skewed relative to the right side plate, so as to form a second angle between the right deflecting plate and the right side plate. The venting device with a deflecting plate according to claim 1, wherein the front end of the left deflecting plate is fast against the right side surface of the left side plate, and the front end of the right deflecting plate is fast against the right side plate. On the left side surface, the angle between the first angle and the second angle is open toward the rear plate. An exhaust device having a deflecting plate according to claim 1 or 2, wherein a front plate is further provided in front of the operating cabinet, and the opening is formed below the front plate. The venting device with a deflecting plate according to claim 3, wherein the bottom of the front plate is provided with an elongated blowing device for blowing downward. The venting device with a deflecting plate according to claim 1 or 2, wherein the front side of the bottom plate is provided with an elongated blowing end, and the elongated blowing end is formed with an elongated shape with an opening facing upward. a blowing port; a first air supply space is formed between the left end and the left side plate of the elongated blowing end a second air supply space is formed between the right end of the narrow air blowing end and the right side plate, and the narrow air blowing port is parallel with the narrow air suction port to enable the narrow suction end and the narrow length when the air suction device is operated. A nearly two-dimensional oblique air curtain is formed between the air blowing ends. The venting device with a deflecting plate according to claim 1 or 2, wherein a front end of the left side plate of the operating cabinet is provided with a curved first deflector, and the right side of the operating panel The front end is provided with a curved second baffle for guiding the airflow into the accommodating space.