CN215430736U

CN215430736U - High-efficient fume chamber of low noise

Info

Publication number: CN215430736U
Application number: CN202120596241.2U
Authority: CN
Inventors: 吴丰
Original assignee: Guangzhou Ke Ke Te Medical Technology Co ltd
Current assignee: Guangzhou Ke Ke Te Medical Technology Co ltd
Priority date: 2021-03-24
Filing date: 2021-03-24
Publication date: 2022-01-07
Anticipated expiration: 2031-03-24

Abstract

The utility model relates to the technical field of experimental equipment, in particular to a low-noise high-efficiency fume hood, which comprises a hood body, wherein an operation table top and an operation chamber are formed in the hood body, an exhaust channel and an air supplement channel are arranged at the top of the hood body, an exhaust chamber and an air supplement chamber are separated from the upper part of the operation chamber through a partition plate, the exhaust chamber and the air supplement chamber are respectively communicated with the exhaust channel and the air supplement channel, micro-perforated plates are respectively arranged in the exhaust chamber and the air supplement chamber, the micro-perforated plates and the partition plate surround to form a sound absorption resonant cavity, and a sound absorption material layer is also arranged on the part of the partition plate, which is positioned in the sound absorption resonant cavity; the utility model has a noise reduction structure, reduces the noise generated by the air circulation and the fan operation, and improves the comfort of experimenters.

Description

High-efficient fume chamber of low noise

Technical Field

The utility model relates to the technical field of experimental equipment, in particular to a low-noise high-efficiency fume hood.

Background

The fume hood is indispensable exhaust equipment in a laboratory, the installation is reasonable, and the harm of chemical gas to laboratory personnel can be effectively reduced; secondly, the gas circulation is generated noise which affects the sense of experimenters, so that the fume hood needs to be subjected to noise elimination treatment.

SUMMERY OF THE UTILITY MODEL

In view of this, the present invention aims to overcome the defects in the prior art, and provides a low-noise high-efficiency fume hood, which has a noise reduction structure, reduces noise generated by air circulation and fan operation, and improves comfort of experimenters.

The utility model discloses a low-noise high-efficiency ventilation cabinet which comprises a cabinet body, wherein an operation table top and an operation chamber are formed in the cabinet body, an air exhaust channel and an air supplement channel are arranged at the top of the cabinet body, an air exhaust chamber and an air supplement chamber are separated from the upper part of the operation chamber through a partition plate, the air exhaust chamber and the air supplement chamber are respectively communicated with the air exhaust channel and the air supplement channel, microperforated plates are arranged in the air exhaust chamber and the air supplement chamber, the microperforated plates and the partition plate surround to form a sound absorption resonant cavity, and a part of the partition plate, which is positioned in the sound absorption resonant cavity, is also provided with a sound absorption material layer.

Further, the cabinet is internally provided with a baffle, the baffle is in separate air exhaust channel in the cabinet body, air exhaust channel communicates the air exhaust chamber, a plurality of extraction openings are opened at different heights of the baffle, and an air volume control structure is arranged at the extraction opening.

Further, the front side of the cabinet body still is provided with the cabinet door that can slide from top to bottom, the cabinet door with the bottom of control chamber forms the operation mouth, the bottom of cabinet door and the edge of operation mesa all is provided with the air supplement pipeline, air supplement pipeline intercommunication air supplement chamber, the orientation has been seted up on the air supplement pipeline the slit export of control chamber, air supplement pipeline is being located slit export forms the inclination on giving vent to anger the ascending outer wall of side, the inclination is towards deviating from the direction setting of operation mouth.

Further, the cabinet body is arranged on the upper portion of the front side of the cabinet door and is further provided with an outer air supplement opening, and the outer air supplement opening is communicated with the air supplement chamber.

Furthermore, the air supply chamber forms an inner air supply opening in the vertical direction through an air deflector in the vertical direction.

The utility model has the beneficial effects that: the utility model discloses a low-noise high-efficiency ventilation cabinet, which realizes the purpose of sound absorption by arranging micro-perforated plates in an exhaust chamber and an air supply chamber, wherein the micro-perforated plates are a resonance sound absorption structure with low sound quality and high sound resistance, the micro-perforated plates are fine and dense in perforation, and sound waves are continuously transmitted in micropores to consume energy, so that the broadband sound absorption capacity can be realized, in addition, a sound absorption resonant cavity is formed in the exhaust chamber and the air supply chamber by utilizing the micro-perforated plates and a partition plate to generate resonance absorption noise, and a sound absorption material layer is arranged in the sound absorption resonant cavity to further improve the noise reduction effect.

Drawings

The utility model is further described below with reference to the following figures and examples:

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic cross-sectional view of the present invention;

fig. 3 is an enlarged view of a portion a in fig. 2.

Description of reference numerals: the cabinet comprises a cabinet body 1, an exhaust channel 2, an air supplement channel 3, an exhaust chamber 4, an air supplement chamber 5, a micro-perforated plate 6, a sound absorption resonant cavity 7, a baffle 8, an air quantity control structure 9, a cabinet door 10, an air supplement pipeline 11, a slit outlet 12, an outer air supplement port 13, an air deflector 14 and an inner air supplement port 15.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1-3, the low-noise high-efficiency fume hood in this embodiment includes a cabinet body 1, an operation table and an operation chamber are formed in the cabinet body 1, an exhaust channel 2 and an air supplement channel 3 are disposed on the top of the cabinet body 1, the exhaust channel 2 and the air supplement channel 3 are respectively communicated with an exhaust system and an air supplement system of a laboratory, an exhaust chamber 4 and an air supplement chamber 5 are separated from the top of the operation chamber by a partition, the partition can be made of a heat-resistant and corrosion-resistant metal material and can be detachable, so as to facilitate cleaning, the exhaust chamber 4 and the air supplement chamber 5 are respectively communicated with the exhaust channel 2 and the air supplement channel 3, microperforated plates 6 are disposed in the exhaust chamber 4 and the air supplement chamber 5, microperforations or microgrooves can be disposed on the microperforated plates 6, and related parameters of corresponding microperforations or microgrooves can adopt the prior art, in this embodiment, the micro-perforated plate 6 also plays a role of air guiding, the micro-perforated plate 6 is disposed opposite to the inlet of the exhaust channel 2 or the outlet of a part of the channels, noise from the exhaust channel 2 or the air supplement channel 3 can be effectively intercepted, the micro-perforated plate 6 and the partition plate surround to form a sound absorption resonant cavity 7, and a part of the partition plate located in the sound absorption resonant cavity 7 is further provided with a sound absorption material layer, so as to further improve the sound absorption effect.

In this embodiment, the cabinet body 1 is further provided with a baffle 8, the baffle 8 separates an air exhaust channel in the cabinet body 1, the air exhaust channel is communicated with the exhaust chamber 4, in the prior art, the fume hood needs to deal with different types of experiments, the fume hood applied to the process with larger heat production quantity is called as a high-temperature fume hood, and correspondingly, the fume hood also has a low-temperature fume hood, the difference lies in that the positions of air suction ports are different, the high-temperature fume hood needs the air suction ports to be arranged at higher positions, the low-temperature ventilation cabinet needs the air extraction opening arranged at a lower position, in order to meet various requirements, a plurality of air extraction openings are arranged at different heights of the baffle 8, an air flow control structure 9 is arranged at the air extraction opening, for adjusting the air pumping rate at different heights, the air control structure 9 in this embodiment can be a louver structure with damping.

In this embodiment, a cabinet door 10 capable of sliding up and down is further disposed on the front side of the cabinet body 1, an operation opening is formed between the cabinet door 10 and the bottom of the operation chamber, when an experimenter operates the cabinet, air at the operation opening is disturbed, a small amount of toxic and harmful gas overflows under the action of the disturbance, and the health of the experimenter is harmed, air supply pipelines 11 are disposed on the bottom of the cabinet door 10 and the edge of the operation table top, the air supply pipelines 11 are communicated with the air supply chamber 5, a slit outlet 12 facing the operation chamber is disposed on the air supply pipelines 11, an inclination angle is formed on the outer wall of the air supply pipeline 11 in the air outlet direction of the slit outlet 12, the inclination angle is disposed in the direction departing from the operation opening, and clean air from the air supply chamber 5 flows out from the slit outlet 12 through the air supply pipeline 11 and flows along the wall under the action of the coanda effect, the gas at the operation port is forced to flow towards the inside of the operation chamber, so that the overflow of harmful gas is avoided, and in order to increase the gas flow rate at the slit outlet 12, a supercharging device can be arranged on the air supplementing pipeline 11.

In order to achieve a better anti-overflow effect, the cabinet body 1 is further provided with an outer air supply opening 13 at the upper part of the front side of the cabinet door 10, the outer air supply opening 13 is communicated with the air supply chamber 5, the air flowing from top to bottom forms an air curtain, and partial air flow at the outer side enters the operation chamber together with the air flowing out from the slit outlet 12.

In this embodiment, the air supply chamber 5 forms an inner air supply opening 15 in the vertical direction through an air deflector 14 in the vertical direction.

Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.

Claims

1. The utility model provides a high-efficient fume chamber of low noise, includes the cabinet body, be formed with operation mesa and control chamber in the cabinet body, the top of the cabinet body is provided with exhaust passage and air supplement channel, its characterized in that: the top of control chamber is passed through the baffle and is kept apart out air exhaust chamber and air supply room, air exhaust chamber and air supply room communicate respectively air exhaust passageway and air supply passageway, all be provided with the microperforated panel in air exhaust chamber and the air supply room, the microperforated panel with the baffle surrounds and forms the sound absorption resonant cavity, the part that the baffle is located shown sound absorption resonant cavity still is provided with the sound absorbing material layer.

2. A low noise high efficiency fume hood according to claim 1 wherein: the cabinet is internally provided with a baffle, the baffle is arranged in the cabinet body to separate an air exhaust channel, the air exhaust channel is communicated with the exhaust chamber, a plurality of air exhaust ports are formed in the positions with different heights of the baffle, and an air volume control structure is arranged at the air exhaust ports.

3. A low noise high efficiency fume hood according to claim 1 wherein: the front side of the cabinet body is further provided with a cabinet door capable of sliding up and down, the cabinet door and the bottom of the operation chamber form an operation opening, air supplementing pipelines are arranged at the bottom of the cabinet door and at the edge of the operation table board and communicated with the air supplementing chamber, the air supplementing pipeline is provided with a gap outlet of the operation chamber, the air supplementing pipeline is located on the outer wall of the gap outlet in the air outlet direction to form an inclination angle, and the inclination angle deviates from the direction of the operation opening.

4. A low noise high efficiency fume hood according to claim 3 wherein: the cabinet body is in the front side upper portion of cabinet door still is provided with outside air supplement mouth, outside air supplement mouth with air supplement chamber intercommunication.

5. A low noise high efficiency fume hood according to claim 4 wherein: the air supply chamber forms an inner air supply opening in the vertical direction through an air deflector in the vertical direction.