TWM472166U - Smoke exhaust cabinet - Google Patents

Description

Draining cabinet

This creation is about a fume hood, especially one that can effectively prevent the leakage of soot pollutants for use in factories, laboratories, and commercial kitchens.

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. However, the soot or other harmful substances in the cabinet are easily leaked from the periphery of the cabinet due to the basic causes of gas dynamics, and the leakage is particularly serious when there are disturbances or people walking around, and the main cause of the leakage. It is because 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.

Therefore, as shown in Figures 5 and 6, 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 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 cabinet a, respectively. 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) parallel, and the pumping end c1 is located in two Between the air blowing ends (b, b1) directly above. 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 cabinet, and the left and right sides of the 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 sides of the plate are closed façades. When the air enters the gap between the two ends of the air blowing end and the left and right side plates respectively, the experimental result will produce an unstable vortex in the cabinet. Part of the airflow flows out through the two gaps above, and does not completely block the leakage of harmful gases.

In view of this, in order to provide a structure different from the conventional technology and to improve the above-mentioned shortcomings, the creator has accumulated many years of experience and continuous research and development improvements, and this creation has not been produced.

One of the aims of the present invention is to provide a fume hood with a left and right deflecting plates in the accommodating space below the cabinet by providing a narrow suction port and a narrow air blowing port at the bottom of the suction hood. The first and second air-filling spaces are respectively formed between the left and right sides of the narrow-shaped air blowing port and the left and right deflecting plates, which can effectively block the airflow in the cabinet, eliminate the high-temperature oil smoke, and prevent the smoke from leaking.

One of the purposes of the present invention is to provide a fume hood with a deflector at the front end of the left and right side panels of the cabinet, and a guide portion at the front end of the suction hood and the front end of the bottom plate.俾 Allows air to smoothly enter the cabinet and reduce the size of the recirculation area to reduce dirt The probability of dye leakage.

For the purpose of the above creation, the fume hood of the creation includes a cabinet, a left deflecting plate and a right deflecting plate. The cabinet comprises 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, an opening is formed in the front of the cabinet body, and a suction end and a blowing air are arranged at the bottom of the suction hood At the end, the suction end is formed with an elongated suction port with an opening facing downward for pumping upward, and the blowing end is formed with an elongated blowing port with an opening facing downward for blowing downward, a narrow suction port and a narrow air blowing port. Parallel to the rear plate, the elongated suction port is located between the narrow blow port and the rear plate, and the length of the narrow blow port is greater than the length of the narrow suction port, thereby forming a first between the left end and the left side plate of the narrow blow port. a qi space 28, a second qi space is formed between the right end of the narrow blow port and the right side plate; the left deflecting plate is erected and fixed in the accommodating space with respect to the left side plate, and the left side is deflected The front end of the plate abuts against the right side surface of the left side plate, so that a first angle is formed between the left deflecting plate and the left side plate, the angle of the first angle is open toward the rear plate; and the right deflecting plate is symmetric to the left side Folding plate, and the right deflecting plate is opposite to the right side plate The oblique manner is fixed upright in the accommodating space, and the front end of the right deflecting plate abuts against the left side surface of the right side plate, so that a second angle is formed between the right deflecting plate and the right side plate, and the angle of the second angle is oriented. Back plate.

In implementation, the first air supply space 28 is formed between the left end of the elongated air blowing port and the left deflecting plate, and the second air supply space is formed between the right end of the elongated air blowing port and the right deflecting plate.

In implementation, the bottom of the front end of the suction hood is provided with a curved first guiding portion, and the front end of the bottom plate is provided with a curved second guiding portion, and the front end of the left side plate of the cabinet body is provided with a curved first guiding portion The flow plate and the front end of the right side plate of the cabinet are provided with a curved second baffle for guiding the airflow into the accommodating space.

In order to facilitate a deeper understanding of this creation, it is detailed later:

1‧‧‧Exhaust fume hood

2‧‧‧ cabinet

21‧‧‧ suction hood

211‧‧‧First Guidance Department

212‧‧‧Second guidance

213‧‧‧Exhaust end

214‧‧‧Blowing end

215‧‧‧Exhaust port

216‧‧‧Blowing mouth

217‧‧‧Exhaust port

218‧‧‧Wind box

219‧‧‧Exhaust device

22‧‧‧floor

23‧‧‧left side panel

231‧‧‧First deflector

24‧‧‧right board

241‧‧‧Second deflector

25‧‧‧ Back panel

26‧‧‧ accommodating space

27‧‧‧ openings

28‧‧‧First air supply space

28’‧‧‧Second air supply space

29‧‧‧Lockers

3‧‧‧Left deflector

4‧‧‧ Right deflecting plate

θ 1‧‧‧ first angle

θ 2‧‧‧second angle

A‧‧‧ 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

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a side cross-sectional view of a preferred embodiment of the present invention.

Figure 2 is a top cross-sectional view of a preferred embodiment of the present invention.

Figures 3 and 4 are diagrams showing the state of use of the preferred embodiment of the present invention.

Figure 5 is a schematic cross-sectional view of a conventional air curtain exhaust cabinet.

Figure 6 is a side cross-sectional view of a conventional air curtain exhaust cabinet.

Referring to Figures 1 and 2, which is a preferred embodiment of the novel fume hood 1, a cabinet 2, a left deflecting plate 3 and a right deflecting plate 4 are included.

The cabinet body 2 is substantially rectangular parallelepiped, and a storage cabinet 29 with legs is arranged below to support the cabinet 2. The cabinet body 2 includes a suction hood 21, a bottom plate 22, a left side plate 23 and a right side. The plate 24 and the rear plate 25 are combined to form an accommodation space 26 inside the cabinet 2, and an opening 27 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 211, and the front end of the bottom plate 22 is provided with a curved second guiding portion 212, and the front end of the left side plate 23 and the front end of the right side plate 24 are respectively provided. An arcuate first baffle 231 and a curved second baffle 241 are provided for guiding the airflow into the accommodating space 26 and reducing the degree of vortex and disturbance when the air is drawn into the opening 27. In the implementation, the first guiding portion 211, the second guiding portion 212, the first deflector 231 and the second deflector 241 may be a quarter radius of a large radius, or may be an arc with a large radius of curvature. The surface can also achieve the effect of guiding air.

The bottom of the suction hood 21 is provided with a suction end 213 and a blowing end 214. The suction end 213 is formed with a suction opening 215 with an opening facing downward, and the blowing end 214 is formed with a narrow opening downward. The long air blowing port 216, the air suction port 215 and the air blowing port 216 are respectively elongated and rectangular, and the long ends of the elongated air suction port 215 and the elongated air blowing port 216 are respectively parallel with the rear plate 25, and the elongated air suction port 215 is long and narrow. Between the air blowing port 216 and the rear plate 25, the length of the elongated suction port 215 is smaller than the width of the inner side of the cabinet 2, and the length of the elongated air blowing port 216 is greater than the length of the elongated suction port 215 but smaller than the width of the inner side of the cabinet 2. A first air supply space 28 is formed between the left end of the elongated air blowing port 216 and the left side plate 23, and a second air supply space 28' is formed between the right end of the elongated air blowing port 216 and the right side plate 24.

In addition, a plurality of exhaust ports 217 are disposed at the top end of the suction hood 21, and each of the exhaust ports 217 is connected to a wind collecting box 218, and the air collecting box 218 is connected to an air extracting device 219 for operating when the air extracting device 219 is operated. , the narrow suction end 213 is pumped, and the air in the cabinet 2 is guided upward; and the narrow air blowing end 214 is in communication with a blower to blow the air outlet 216 downward through the action of the air blower. A two-dimensional air jet. In practice, the blower may also be a cross flow fan; the air extractor 219 is an exhaust fan, a blower or other extractable fluid machine.

The left and right deflecting plates (3, 4) are respectively a rectangular vertical plate, wherein the left deflecting plate 3 is vertically fixed in the accommodating space 26 in a manner of being skewed relative to the left side plate 23, and the left deflecting plate The front end of 3 abuts against the right side surface of the left side plate 23, so that the first air supply space 28 is formed between the left end of the elongated air blowing port 216 and the left deflecting plate 3, and the left deflecting plate 3 and the left side plate 23 are formed. A first angle θ 1 is formed therebetween, and the angle of the first angle θ 1 is opened toward the rear plate 25. The right deflecting plate 4 is symmetrical to the left deflecting plate 3, and the right deflecting plate 4 is vertically erected in the accommodating space 26 so as to be skewed relative to the right side plate 24, and the front end of the right deflecting plate 4 abuts On the left side surface of the right side plate 24, a second air supply space 28' is formed between the right end of the elongated air blowing port 216 and the right deflecting plate 4, while forming a first between the right deflecting plate 4 and the right side plate 24. The angle between the two angles θ 2 and the second angle θ 2 is toward the rear plate 25 .

Thereby, as shown in FIGS. 3 and 4, when the object or facility disposed on the bottom plate 22 is a heating device 9 that generates high-temperature soot, such as a heating furnace or a heating plate, the high-temperature fume is buoyant by the high-temperature gas. The effect can make the soot rise. The oil smoke is sucked up through the air suction port 215, the air is blown downward through the air blowing port 216, and the outside air in front of the cabinet 2 passes through the first air supply space 28 and the second air supply space 28' to perform air supply, and the left side is used. The flap 3 and the right deflecting plate 4 guide the air flow to form a pair of stable scrolls abutting each other as shown in Fig. 3, and discharge the smoke evacuated belt to the upper suction port 215. Wherein, when the airflow flows on the right side of the left side panel 23 of the cabinet 2 and the left side of the right side panel 24, the air entering the cabinet 2 can be blocked due to the blocking and guiding of the left and right deflecting plates (3, 4). It will not return along the original path, and can avoid the high temperature fumes leaking out.

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

1. This creation can make the air entering the cabinet not back through the combination of the narrow and long suction port, the narrow-shaped air blowing port, the left deflecting plate and the right deflecting plate, and the first and second air supply spaces are The air is ventilated, so it can effectively block the airflow in the cabinet and eliminate the high temperature soot to prevent the smoke from leaking.

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 It can effectively reduce the size of the recirculation zone and prevent backflow of soot or contaminants from the opening to reduce the probability of contaminant leakage.

In summary, according to the content disclosed above, this creation can achieve the intended purpose, and provide a kind of smoke-free fume hood that can effectively reduce the dissipating of soot or pollutants, which is of great industrial value. , 提出 file a new type of patent application.

1‧‧‧Exhaust fume hood

2‧‧‧ cabinet

21‧‧‧ suction hood

211‧‧‧ first guide

215‧‧‧Exhaust port

216‧‧‧Blowing mouth

23‧‧‧left side panel

231‧‧‧First deflector

24‧‧‧right board

241‧‧‧Second deflector

25‧‧‧ Back panel

26‧‧‧ accommodating space

27‧‧‧ openings

28‧‧‧First air supply space

28’‧‧‧Second air supply space

3‧‧‧Left deflector

4‧‧‧ Right deflecting plate

θ 1‧‧‧ first angle

θ 2‧‧‧second angle

Claims (4)

A fume hood, comprising: a cabinet comprising a suction hood, a bottom plate, a left side plate, a right side plate and a rear plate, and forming an accommodating space in the frame, the opening forming an opening in the front of the cabinet The bottom of the suction hood is provided with a suction end and an air blowing end, and the air suction end is formed with an elongated suction opening with an opening facing downward for pumping upward, and the air blowing end is formed with an elongated shape with an opening facing downward. a blowing port for blowing downward, the elongated suction port and the elongated blowing port being parallel to the rear plate, the elongated suction port being located between the elongated blowing port and the rear plate, and the elongated blowing port The length of the elongated suction port is greater than the length of the elongated suction port, so that a first air supply space is formed between the left end of the elongated air blowing port and the left side plate, and a right side between the right end of the elongated air blowing port and the right side plate is formed. a plenum space; a left deflecting plate is erected and fixed in the accommodating space in a manner of being skewed relative to the left side plate, and the front end of the left deflecting plate abuts against the right side surface of the left side plate, thereby Forming a first between the left deflecting plate and the left side plate An angle opening of the first angle toward the rear plate; and a right deflecting plate symmetrical to the left deflecting plate, and the right deflecting plate is erected and fixed in a manner inclined with respect to the right side plate In the accommodating space, the front end of the right deflecting plate abuts against the left side surface of the right side plate, so that a second angle is formed between the right deflecting plate and the right side plate, and the angle of the second angle is open. Facing the rear panel. The range hood according to claim 1, wherein the first qi space is formed between the left end of the elongated blow port and the left deflecting plate, and the second qi space is formed in The right end of the elongated blow port is between the right deflecting plate. The fume hood according to claim 1 or 2, wherein the bottom of the front end of the suction hood is provided with an arcuate first guiding portion, and the front end of the bottom plate is provided with an arc-shaped second guiding portion. unit. The fume hood according to claim 1 or 2, wherein the left side plate of the cabinet The front end of the cabinet is provided with an arc-shaped first deflector, and the front end of the right side panel of the cabinet is provided with a curved second deflector for guiding airflow into the accommodating space.