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Air flow full-seal-type smoke exhaust hood

A fully enclosed, fume extraction hood technology, applied in the field of fume extraction hoods, can solve the problems of blocking the operator's movement and sight, operator harm, and inconvenient operation, and achieves the goal of improving uniformity, reducing harm, and improving exhaust efficiency. Effect

Inactive Publication Date: 2013-05-08
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to the research, the negative pressure area of ​​the cabinet type range hood is about 0.32 cubic meters, and the smoke exhaust efficiency is greater than 95%, which shows that the oil fume is not easy to overflow in the cabinet type range hood structure, and its suction effect is better than other types of exhaust hoods , but because the cabinet-type range hood adopts the form of three-sided sealing, that is, hard materials are often used to prevent the diffusion of oil fumes to both sides, instead of flexible air curtains, so it will block the operator's actions and sight lines, and bring troubles to the operation. Inconvenient, in addition, if the amount of smoke generated is large, it is likely to overflow from the unclosed side of the cooking operation, causing greater harm to the operator, and making the operator somewhat limited and inconvenient when cooking

Method used

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  • Air flow full-seal-type smoke exhaust hood
  • Air flow full-seal-type smoke exhaust hood
  • Air flow full-seal-type smoke exhaust hood

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] According to the actual use, the numerical calculation model of the airflow fully enclosed high-efficiency exhaust hood is established. The length × width × height of the room is 4800 × 2400 × 2400mm; The height of the lower edge from the ground is 1200 mm; the size of the first rectified plenum and the second rectified plenum are the same: length × width × height is 500 × 50 × 600 mm, and the length × width of the stove is 2400 × 600mm; the height of the cooktop from the ground is 900mm; the radius of the pollution source is 300mm, and the height of the pollution source is 1200mm. The speed is 1.5m / s. In this embodiment, the first air blower 4 and the second air blower 3 are installed in the top shell 5, and the first air direction adjustment baffle 21 and the first side slit air outlet 17 are located in the specific structure of the exhaust hood. The included angle of the plane is 75°, the included angle between the second wind direction adjusting baffle plate 21 and...

Embodiment 2

[0074] This embodiment differs from Embodiment 1 in that, under the condition that the air supply volume is kept constant, there is only one air supply fan in this embodiment, so as to reduce the initial investment.

Embodiment 3

[0076] The difference between this embodiment and Embodiment 1 is that the angle between the first wind direction adjustment baffle 21 and the plane where the first side slit air outlet 17 is located is 65°, and the second wind direction adjustment baffle 21 and the second side slit The included angle of the plane where the slit air outlet 17 is located is 65°, and the air curtain air supply angle is the incompleteness of the rotating air curtain formed when the included angle between the adjustment baffle plate and the plane where the side slit air outlet is located is 65°, and the control effect is poor. This is because when the air supply angle is small, the vortex nucleus becomes smaller, the rotation speed increases, and the disturbance of the air increases, which makes the flow field unstable and easy to cause harmful gases to escape. . Therefore, this embodiment shows that the air supply angle cannot be as small as possible.

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Abstract

The invention discloses an air flow full-seal-type smoke exhaust hood. Outdoor air is respectively sent to a first air flow adjustment static pressure tank and a second air flow adjustment static pressure tank by a first air supply fan and a second air supply fan; after the air flow is mixed uniformly in the air flow adjustment static pressure tanks, the air flow is sent out by two side seam air outlets at the diagonal positions of the smoke exhaust hood and two bottom seam air outlets positioned at the bottom part of the air flow adjustment static pressure tanks, thus a full-seal-type air curtain is formed; oil and smoke pollutants are isolated completely from an operator, moreover, under the mixing effect of the shearing force of air supply along an adjustment baffle at the two side seam air outlets at the diagonal positions and the separating force of a smoke exhaust fan, artificial whirlwind is formed, thus the discharging efficiency of the pollutants is improved; and simultaneously, the air supply of the bottom seam air outlets at the bottom part of the air flow adjustment static pressure tanks supplies air required by the combustion of the fuel, thus the fuel is combusted fully, and the aims of energy conservation and emission reduction are achieved.

Description

technical field [0001] The invention relates to a smoke exhaust hood, and specifically discloses an airflow fully enclosed high-efficiency smoke exhaust hood. Background technique [0002] With the development of the economy and the improvement of people's living standards, the problem of kitchen fumes has become a hot spot of concern, and people are becoming more and more aware of the adverse effects of kitchen fumes on the indoor environment. Kitchen fume mainly refers to the hot oil fumes generated by cooking operations, which are more harmful to the human body than cigarettes. Moreover, kitchen fume has certain inertial force and buoyancy force, as well as strong permeability and viscosity, which will not only pollute the kitchen air, but if not effectively controlled, it may also have a negative impact on the indoor environment of adjacent areas. Therefore, controlling the diffusion of cooking fumes has become the key to optimal control of indoor air quality in the kit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F24C15/20
Inventor 李安桂赵玉娇陶鹏飞王志华高然
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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