CN106140769B - Ventilation cabinet - Google Patents
Ventilation cabinet Download PDFInfo
- Publication number
- CN106140769B CN106140769B CN201510169620.2A CN201510169620A CN106140769B CN 106140769 B CN106140769 B CN 106140769B CN 201510169620 A CN201510169620 A CN 201510169620A CN 106140769 B CN106140769 B CN 106140769B
- Authority
- CN
- China
- Prior art keywords
- air
- supplementing
- opening
- exhaust
- air supply
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000009423 ventilation Methods 0.000 title claims description 22
- 230000001502 supplementing effect Effects 0.000 claims abstract description 78
- 239000003517 fume Substances 0.000 claims abstract description 43
- 239000013589 supplement Substances 0.000 claims description 21
- 230000001681 protective effect Effects 0.000 claims description 9
- 238000001514 detection method Methods 0.000 claims description 3
- 238000005265 energy consumption Methods 0.000 abstract description 11
- 239000000126 substance Substances 0.000 abstract description 9
- 238000009434 installation Methods 0.000 abstract description 7
- 239000003570 air Substances 0.000 description 303
- 239000007789 gas Substances 0.000 description 12
- 238000013461 design Methods 0.000 description 7
- 239000012080 ambient air Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000004378 air conditioning Methods 0.000 description 3
- 239000003153 chemical reaction reagent Substances 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 230000004888 barrier function Effects 0.000 description 2
- 230000003139 buffering effect Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 230000036541 health Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000029058 respiratory gaseous exchange Effects 0.000 description 2
- 231100000331 toxic Toxicity 0.000 description 2
- 230000002588 toxic effect Effects 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000383 hazardous chemical Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 230000007096 poisonous effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 238000013022 venting Methods 0.000 description 1
- 238000001039 wet etching Methods 0.000 description 1
Images
Landscapes
- Ventilation (AREA)
- Devices For Use In Laboratory Experiments (AREA)
Abstract
The invention provides a fume hood which can reduce the energy consumption of an air conditioner, inhibit the overflow of harmful substances in a working cavity, and has low installation cost and high consistency of product quality, comprising: a cabinet body, the inner cavity of which forms a working cavity, and the front wall of which is provided with a front opening which is open to the indoor environment; the air supplementing system is connected with an air supplementing channel of the building and used for supplementing air to the working cavity; and the exhaust system is connected with an exhaust channel of a building, and exhausts the air entering the working cavity through the front opening and the air entering the working cavity through the air supplementing system from the working cavity, the air supplementing system is respectively provided with at least one air supplementing opening at the upper part and the lower part of the cabinet body, the air supplementing opening supplies air towards the inside of the working cavity, a top module is arranged above the cabinet body, an air supplementing fan and an air supplementing valve for the air supplementing system and an exhaust fan and an exhaust valve for the exhaust system are arranged in the top module, and the air supplementing fan and the air supplementing valve are connected with the air supplementing channels of the air supplementing openings.
Description
Technical Field
The invention relates to a ventilation cabinet, in particular to a wind supplementing type ventilation cabinet.
Background
A fumehood can be generally described as a ventilated workspace for capturing, containing, and removing exhaust gases, harmful gases, and particulate matter. Most of the conventional fume hoods adopt a large amount of ambient air fed into a working cavity of the fume hood from a front opening of the fume hood, and meanwhile, a high-power fan is used for exhausting air in the working cavity to accommodate and treat harmful substances in the air. Under the design concept of the conventional hood, the higher the amount of air fed from the front opening, the more effective the hood has on the control and discharge functions of harmful substances in the air, and therefore it is necessary to supplement a large amount of air to a space using the hood, such as a laboratory, through the heating, ventilating and air conditioning system of a building to replace the ambient air fed into the hood from the front opening. Since the air to be supplied to the laboratory is part of the ambient air supplied to the laboratory, it must be treated to the same degree of ambient air to ensure the comfort and safety of the laboratory working environment, and therefore the use of conventional fume hoods generally results in a great energy consumption of the building in which the laboratory is located, etc. In addition, unpredictable and inconsistent air flow patterns, such as swirling air patterns near the exhaust and front openings, can often occur. In this case, no matter what the speed of the air fed from the front opening is, the air system in the working chamber, if there is turbulence and vortex, will cause the risk of air overflow in the working chamber, posing a threat to the health and safety of the experimenters. Therefore, new fume hood designs and operating techniques are highly desirable to reduce energy consumption and to reduce the risk of flooding of the working chamber with hazardous materials.
The novel energy-concerving and environment-protective type fume chamber on the fume chamber market at present is the type fume chamber of mending wind. The air supplementing opening is arranged above or below the cabinet body, the compensation air flow is obtained from the air supplementing power system of the building and is blown into the working cavity of the ventilation cabinet, and the air conditioning energy consumption of the building caused by air supplementing is saved to a certain extent by the design. However, the single air supplement flow of the existing novel fume hood cannot establish a stable air flow mode in the working cavity of the fume hood, so that the problems of air turbulence and vortex are still not solved, and the overflow risk which harms the health and safety of experimenters still exists. In addition, the fume hoods in the current market all rely on the unified air supply system and the air exhaust system of the building to obtain power, if a plurality of fume hoods are used simultaneously, the air supply and exhaust amount of the fume hoods cannot be adjusted according to the needed individuality of the use condition, and the result of high energy consumption is also caused. In addition, in the installation and debugging process, the fume hood and the control system thereof are usually temporarily assembled on site by adopting bulk parts, so that the problems of high installation cost and poor consistency of product quality exist.
Disclosure of Invention
Problems to be solved by the invention
The present invention has been made in view of the above problems, and an object of the present invention is to provide a ventilation hood which can reduce air conditioning energy consumption, suppress overflow of harmful substances in a working chamber, and achieve low installation cost and high consistency in product quality.
Means for solving the problems
In order to solve the above problems, the hood of the present invention includes: a cabinet body, the inner cavity of which forms a working cavity, and the front wall of which is provided with a front opening which is open to the indoor environment; the air supplementing system is connected with an air supplementing channel of a building and used for supplementing air to the working cavity; and the exhaust system is connected with an exhaust channel of a building, air entering the working cavity through the front opening and air entering the working cavity through the air supplementing system are exhausted from the working cavity, the air supplementing system is respectively provided with at least one air supplementing opening at the upper part and the lower part of the cabinet body, the air supplementing openings supply air towards the inside of the working cavity, a top module is arranged above the cabinet body, an air supplementing fan and an air supplementing valve for the air supplementing system and an exhaust fan and an exhaust valve for the exhaust system are arranged in the top module, and the air supplementing fan and the air supplementing valve are connected with the air supplementing channels of the air supplementing openings.
By adopting the structure, the upper part and the lower part of the cabinet body are respectively provided with at least one air supplementing opening, so that the air quantity sent from the front opening can be reduced, the energy consumption of an air conditioner is reduced, and in addition, a stable push-pull type air flow mode can be established in the working cavity due to the arrangement of the plurality of air supplementing openings, so the risk of air overflow in the working cavity is greatly reduced. In addition, because the fume hood has the exhaust fan and the exhaust valve, and the air supplement fan and the air supplement valve, the exhaust air quantity and the air supplement air quantity can be flexibly designed according to the practical conditions such as the distance of the fume hood relative to the total power fan of the building, whether an operator is located in a set area and the like, and the energy consumption is further reduced. In addition, the fan, the valve and the like are integrated on the top module of the ventilation cabinet, so that field assembly or secondary design of a ventilation system of a building is not needed, and the installation cost can be reduced. Further, due to the highly integrated modular design, the consistency of product quality can be guaranteed.
In addition, preferably, the left side wall and the right side wall of the cabinet body are of a hollow double-layer structure, and the air supplementing channel positioned on the upper portion of the cabinet body is communicated with the air supplementing channel positioned on the lower portion of the cabinet body through the hollow portions of the left side wall and the right side wall.
By adopting the structure, the air supplementing channels positioned at the upper part and the lower part of the cabinet body are communicated with each other through the hollow parts of the side walls, so that additional connecting pipelines are not needed, the space is saved, and the procedure of a user when the ventilation cabinet is installed for the first time is simplified.
In addition, it is preferable that the exhaust system has an exhaust area at a position on an upper portion of the cabinet body and near a rear wall of the cabinet body, the exhaust area extending in a whole left-right width direction of the cabinet body and being connected to the exhaust fan and the exhaust valve.
By adopting the structure, the air exhaust area is arranged at the upper part of the cabinet body and is close to the rear wall of the cabinet body, so that the push-pull type air flow mode is formed. In addition, since the discharge area extends in the entire right and left width direction of the cabinet body, it is possible to avoid formation of air vortex near the top discharge port of the working chamber, and to provide possibility of communication of the entire discharge system including the below-described bottom cabinet discharge duct.
In addition, preferably, each of the air supply ports extends along a left-right width direction of the working chamber, and the plurality of air supply ports includes: the first air supplementing opening is positioned above the front opening; a second air supply opening positioned below the front opening; and the third air supply opening is positioned at the upper part of the cabinet body and on the outer side of the front wall, and the third air supply opening supplies air towards the inside of the working cavity and the lower part of the cabinet body.
By adopting the structure, the push-pull type air flow mode is formed. In addition, the air supply opening extends along the left and right width direction of the working cavity, so that air can be uniformly sent out, and the formation of turbulent flow can be prevented. In addition, because the third air supplement opening blows downwards, the air blown downwards is just positioned at the breathing position of the operator, the risk that the operator inhales harmful substances is further reduced, an air barrier is formed by the air blown downwards, the effect of buffering the air in the working cavity and the air in the environment outside the cabinet can be achieved, and the overflow risk is effectively prevented.
Further, it is preferable that the working chamber has an inclined ceiling wall extending obliquely rearward and upward from the first air supply opening toward the air exhausting region.
Adopt above-mentioned structure, can prevent to form the vortex at the top of working chamber, can make the interior gas of working chamber follow above-mentioned first tonifying qi mouth and slowly evenly climb to above-mentioned air exhaust region along the slope roof.
In addition, it is preferable that a guide plate is provided in the working chamber, the guide plate is erected near the rear wall, and an upper end portion of the guide plate extends toward the exhaust area, and a plurality of through holes are provided in a lower portion of the guide plate, and the plurality of through holes are distributed in the entire left-right width direction of the guide plate.
By adopting the structure, the air in the working cavity is guided to the exhaust area to avoid the generation of air vortex, and the through holes on the guide plate are distributed in the whole left and right width directions of the guide plate, so that the continuous air exhaust with basically consistent wide surfaces of the whole working cavity is facilitated.
In addition, preferably, at least one bottom cabinet is provided below the cabinet body, an inner cavity of the bottom cabinet is communicated with the air exhaust area through a bottom cabinet air exhaust channel, and the bottom cabinet air exhaust channel is provided in a hollow portion of at least one of the left and right side walls and extends in the up-down direction close to the rear wall.
By adopting the structure, harmful gas generated by storing volatile reagents or toxic materials in the bottom cabinet can be exhausted outdoors. And because the air exhaust channel of the bottom cabinet is arranged in the hollow part of the side wall, the space is saved, and the procedure of a user when the ventilation cabinet is installed for the first time is simplified.
In addition, preferably, each air supply opening is provided with a flow deflector.
By adopting the structure, the turbulent flow can be minimized, and the air supplementing flow can be ensured to be uniformly and slowly blown out along the set direction.
In addition, preferably, a protective grid surrounding the second air supply opening is arranged outside the second air supply opening, and a protective grid surrounding the third air supply opening is arranged outside the third air supply opening.
By adopting the structure, the material consumption of the air supply port can be effectively reduced, the bottom air supply can be further facilitated to become laminar flow to be supplied into the working cavity, and sundries can be prevented from entering the air supply port.
In addition, preferably, the air supply fan and the air exhaust fan are respectively power-adjustable fans, the air supply valve and the air exhaust valve are respectively opening-variable valves, and the ventilation cabinet is further provided with: a sliding window slidable along the front opening for adjusting an opening area of the front opening; a position sensor provided in the top module for detecting a position of the sliding window; a wind speed sensor disposed on an inner wall of the working chamber adjacent to the front opening for detecting a speed of air entering the working chamber from the front opening; the infrared detector is arranged on the front wall of the top module and used for detecting whether an operator is in a set area; and the control unit is positioned in the top module, is connected with the position sensor, the wind speed sensor, the infrared detector, the air supplementing fan, the air supplementing valve and the air exhausting fan and the air exhausting valve, and adjusts the power of the air supplementing fan, the opening degree of the air supplementing valve, the power of the air exhausting fan and the opening degree of the air exhausting valve based on the detection information of the position sensor, the wind speed sensor and the infrared detector.
By adopting the structure, the power and the opening degree of the air supplementing fan, the air supplementing valve, the air exhaust fan and the air exhaust valve can be automatically adjusted by utilizing the automatic control system according to the actual use condition of the fume hood, so that the energy consumption of an air conditioner can be reduced, the structure is simple and convenient, the space is saved, and the installation cost and the maintenance cost of the fume hood are greatly reduced.
Drawings
Figure 1 is a front view of a fumehood according to a preferred embodiment of the present invention.
Figure 2 is a rear cross-sectional view of a fumehood according to a preferred embodiment of the present invention.
Figure 3 is a perspective view of a fumehood according to a preferred embodiment of the present invention.
Figure 4 is an airflow guide diagram of a fumehood according to a preferred embodiment of the present invention.
Fig. 5 is an airflow directing diagram of the air make-up system of the fumehood of the preferred embodiment of the present invention.
Figure 6 is an air flow directing diagram of the ventilation system of the fumehood of the preferred embodiment of the present invention.
Description of the symbols
100 cabinet
102 working chamber
103 left and right side walls
104 top wall
105 bottom cabinet
106 rear wall
108 bottom wall
109 inclined top wall
110 front opening
201 first air supply channel
202 second air supply channel
203 third air supply channel
211 air supply fan
212 air supply valve
311 air exhaust fan
312 exhaust valve
313 gas collecting channel
314 baffle
315 diversion trench
335 area of exhaust
400 top module
801 wind speed sensor
802 position sensor
803 infrared detector
804 sliding window
A1 first air supply opening
A2 second air supply opening
A3 third air supply inlet
A4 air supply main port
B1, B2 bottom cabinet air exhaust channel
B4 air exhaust main port
Detailed Description
Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings. While the invention will be described in conjunction with the preferred embodiments, it is not intended that features of the invention be limited to only those embodiments. On the contrary, the invention is described in connection with the embodiments for the purpose of covering alternatives or modifications that may be extended based on the claims of the present invention. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The invention may be practiced without these particulars. Moreover, some of the specific details have been left out of the description in order to avoid obscuring or obscuring the focus of the present invention.
In addition, the terms "upper", "lower", "left", "right", "top" and "bottom" used in the following description are defined based on the spatial positions of the hood when used by laboratory technicians, and should not be construed as limiting the present invention.
As shown in fig. 1 to 4, a fume hood according to a preferred embodiment of the present invention includes a cabinet 100, an inner cavity of the cabinet 100 forms a working chamber 102, and the cabinet 100 has: left and right side walls 103, a top wall 104, a rear wall 106, a bottom wall 108, and a front opening 110 formed in the front wall that opens to the indoor environment. In the present embodiment, two bottom cabinets 105 are provided below the cabinet 100, and the bottom cabinets 105 can be used to store reagents and materials required for an experiment.
A top module 400, which is unique to the fumehood of the present invention, is provided above the cabinet 100. The top module 400 has internally mounted: the air supply system comprises an air supply fan 211 with adjustable power, an air supply valve 212 with adjustable opening degree at the downstream side of the air flow direction of the air supply fan 211, an air exhaust fan 311 with adjustable power, and an air exhaust valve 312 with adjustable opening degree at the downstream side of the air flow direction of the air exhaust fan. The air supply fan 211, the air supply valve 212, and the air supply ports and the air supply passages described below constitute an air supply system, and the air supply system is connected to the air supply passage of the building through an air supply main port a4 to supply air into the working chamber 102. The exhaust fan 311, the exhaust valve 312, and an exhaust area and an exhaust duct described later constitute an exhaust system connected to an exhaust duct of a building through an exhaust port B4, and exhausts the air introduced into the working chamber 102 through the front opening 110 and the air introduced into the working chamber 102 through the air supply system from the working chamber 102.
Fig. 4 is an airflow guide diagram of the hood of the present embodiment, and fig. 5 is an airflow guide diagram of the air supply system of the hood of the present embodiment. As shown in fig. 4 and 5, a first air supply opening a1 is provided above the front opening 110, and the first air supply opening a1 is formed in a semi-cylindrical shape extending in the lateral width direction of the working chamber 102, and the semi-cylindrical surface faces the working chamber 102, i.e., faces rearward. The first air supply opening a1 is provided with a plurality of guide vanes 221 (shown in fig. 5) extending in the axial direction of the semi-cylindrical surface and arranged in the circumferential direction. A first air supply passage 201 is provided at an upper portion of the cabinet to extend in a left-right width direction of the cabinet, and the first air supply passage 201 connects the air supply valve 212 and the first air supply opening a 1. The side of the first air supply channel 201 close to the working chamber 102 is designed as an inclined wall. The inclined wall can uniformly distribute the air moving in the first air supplement channel 201 and reduce the wind speed. Thus, by operating the make-up air blower 211, the first make-up air opening a1 feeds make-up air uniformly and slowly into the working chamber 102 of the hood in the radial direction of the semi-cylindrical surface. Although the air flow sent from the air supply fan 211 to the first air supply opening a1 still has a certain proportion of turbulence (about 15% or less), the baffle 221 is arranged to block the turbulence and ensure that the air flow blown into the working chamber 102 from the first air supply opening a1 is in a laminar state.
Below the front opening 110, a second air supply opening a2 is provided, and the second air supply opening a2 is designed to have a 1/4 cylindrical surface shape extending in the left-right width direction of the working chamber 102, and a cylindrical surface 1/4 thereof faces the working chamber 102, i.e., upward and rearward. The second air supply opening a2 is provided with a plurality of guide vanes 222 (as shown in fig. 5) extending in the axial direction of the cylindrical surface 1/4 and arranged in the circumferential direction. The lower part of the cabinet body is provided with a second air supplement channel 202 which crosses the left and right width directions of the cabinet body, and the second air supplement channel 202 conveys the air from the air supplement fan 211 to the second air supplement opening A2, so that the compensation air flow can be uniformly blown into the working cavity along the radial direction of the 1/4 cylindrical surface. In addition, since the second air supply opening a2 is located in the working area of the fume hood, the guide vanes in this area may be worn due to frequent use. Therefore, in the present embodiment, a protective grill (not shown) surrounding the second air supply opening a2 is provided outside the second air supply opening a2 to prevent the flow deflector 222 from being worn. Meanwhile, the protective grille can help guide the air flow of the air supplement of the second air supplement opening A2 and help the air sent out from the second air supplement opening A2 to be in a laminar state and be supplemented into the working cavity 102, and in addition, the protective grille can also play a role in preventing sundries from entering the second air supplement opening A2.
A third air supply opening A3 is provided in the upper part of the cabinet 100 and in front of the front wall, and this third air supply opening A3 is designed in the shape of 1/4 cylinder extending in the left-right width direction of the working chamber 102, and the cylinder surface 1/4 thereof faces the working chamber 102, i.e., in the rear-lower direction. A plurality of flow deflectors 223 (as illustrated in fig. 5) extending in the axial direction of the cylindrical surface and arranged in the circumferential direction are provided in the third air supply opening a 3. A third air supply duct 203 extending across the left-right width direction of the cabinet is provided in the upper portion of the cabinet, a sliding window 804, which will be described later, is interposed between the third air supply duct 203 and the first air supply duct 201, the third air supply duct 203 bypasses the sliding window 804 and communicates with the first air supply duct 201, and the air from the air supply fan 211 is sent to the third air supply opening a 3. The surface of the third air supply channel 203 far away from the cabinet body is designed to be an inclined wall, so that air moving in the third air supply channel 203 is uniformly distributed, and the wind speed is reduced. Under the action of the air supply fan 211, the supplementary air can be uniformly and slowly blown out along the radial direction of the third air supply opening A3. The third air supply opening a3 supplies air not only towards the working chamber 102 of the cabinet 100, but also towards the lower part of the cabinet 100, and the downward air supply opening is just positioned at the breathing position of the experimenter, so that the risk of the experimenter inhaling harmful substances is further reduced. In addition, the air blown downwards from the third air supply opening A3 forms an air barrier, which plays a role of buffering the air in the working cavity 102 and the ambient air outside the cabinet, and effectively prevents the overflow risk. In the present embodiment, a protective grill surrounding the third air supply opening A3 is also provided outside the third air supply opening A3, and the protective grill also plays a role in preventing wear of the guide vanes, guiding air supply flow, and preventing foreign matter from entering the air supply opening.
As shown in fig. 5, the left and right sidewalls 103 of the cabinet 100 are of a hollow double-layer structure, and the first air supply channel 201 located at the upper portion of the cabinet is communicated with the second air supply channel 202 located at the lower portion of the cabinet through the hollow portions 225 of the left and right sidewalls 103, so that all the air supply channels of the present embodiment are communicated with each other, and thus the air supply amount of the ventilation cabinet can be uniformly controlled by the power of the air supply fan 211 and the opening of the air supply valve 212.
As shown in fig. 2 and 4, a gas collecting hood 313 is provided at a position on the upper portion of the cabinet and close to the rear wall 106, the gas collecting hood spanning the entire lateral width direction of the cabinet 100. The upper end of the gas collecting hood 313 is connected to the exhaust fan 311, and the inside thereof forms an exhaust area 335 extending in the entire lateral width direction of the cabinet 100. By providing such a discharge area 335, it is possible to avoid the formation of air vortices near the top discharge opening of the working chamber 102 and to provide the possibility of communication of the entire discharge system including the bottom cabinet discharge duct described later.
As shown in fig. 4, in the present embodiment, the working chamber 102 further has an inclined top wall 109 extending obliquely rearward and upward from the first air supply opening a1 to the air discharge region 335, the inclined top wall 109 partially surrounds the working chamber 102, both sides of the inclined top wall 109 are connected to the left and right side walls 103 of the cabinet, the bottom end is connected to the upper edge of the first air supply opening a1, and the top end is connected to the top wall 104. Because the work of the high volume of airing exhaust of exhaust fan, the interior top of traditional fume chamber work chamber can often form the air vortex, makes poisonous and harmful gas can't be discharged, and the enlarged change of vortex can be broken in the design of slope roof, and the laminar flow wind that the first supply air inlet A1 at top sent out in the cooperation cabinet can make the interior gas of cabinet slowly evenly climb to the region of airing exhaust along the skew wall. The angled and shaped design of this angled top wall 109 is intended to help control and prevent the overflow of harmful substances in the air within the working chamber 102 and to reduce the possibility of air swirling near the top venting area 335. As shown in fig. 1 and 4, a baffle 314 is further erected in the working chamber 102 at a position close to the rear wall 106, an upper end of the baffle 314 extends toward the discharge area 335, a plurality of through holes are provided in a lower portion of the baffle 314, the through holes are distributed over the entire width of the baffle 314 in the right-left direction, and a baffle groove 315 is provided between the baffle 314 and the bottom wall 108. By providing the baffle 314 with a through hole, the air in the working chamber 102 can be stably guided to the top discharge area 335 without generating air vortex, and continuous discharge of air can be performed with substantially uniform width of the entire working chamber 102.
The arrows in fig. 4 show the manner in which air flows as it enters, passes through and exits the cabinet of the fumehood. Under the action of the air supply fan 211 and the air supply valve 212, the air supply air flow enters the air supply system of the ventilation hood from the main air supply opening a4, flows to the air supply openings a1, a2 and A3, and then uniformly and slowly enters the working cavity 102, and meanwhile, a part of ambient air also enters the working cavity 102 from the front opening 110 at an angle perpendicular to the front opening 110. After entering the working chamber 102, the air is substantially uniformly pulled toward and through the top exhaust region 335, the baffle 314 and the baffle 315, as indicated by the arrows, and then exits the cabinet at the top general exhaust outlet B4 in the direction of the arrows. It will be clear to the skilled person that: the change in the air flow area causes fluctuation in the air flow velocity. Thus, the air entering from the front opening 110 may have a reduced velocity when it enters a large area of the working chamber 102; as this air continues to flow near the top exhaust region 335, the wind speed increases. This fluctuation in wind speed helps maintain a consistent, stable push-pull system of make-up and exhaust. The push-pull system can move the air in the cabinet in a synchronous displacement mode, so that the air supplement quantity and the turbulent risk of the air in the cabinet can be greatly reduced. Furthermore, the push-pull system and the provision of the inclined top wall 109 employed in this embodiment may minimize the risk of air turbulence and vortex formation within the cabinet, particularly the air structure above the working chamber 102 and at the front opening 110. Thus, the displaced air-moving system created by this push-pull system can more effectively control the likelihood of harmful substances in the air within the cabinet overflowing the front opening.
Fig. 6 is an air flow guide diagram of the ventilation system of the hood according to the present embodiment. In order to exhaust toxic and harmful gases generated by the placement of working agents or materials in the two bottom cabinets 105 of the hood, as shown in fig. 2 and 6, the rear portions of the two bottom cabinets 105 of the hood of the present embodiment are provided with bottom cabinet exhaust ducts B1 and B2, respectively. The bottom cabinet exhaust ducts B1 and B2 are respectively provided in the hollow portions of the corresponding left and right side walls 103 and extend in the vertical direction near the rear wall 106 to communicate the inner cavity of the corresponding bottom cabinet 105 with the corresponding side of the exhaust area 335 in the air collecting hood 313 at the top of the cabinet. Thus, under the action of the exhaust fan 311, the air in the base cabinet 105 can be drawn into the base cabinet exhaust ducts B1 and B2, and mixed with the air flow in the working chamber 102 pushed and pulled to the exhaust area 335 at the exhaust area 335, and discharged together from the total exhaust outlet B4 into the exhaust duct of the building. It can be seen that, like the air supply system, the exhaust channels of the fume hood of the present invention are also connected to each other, and the total exhaust air volume can be controlled by the power of the exhaust fan 311 and the opening of the exhaust valve 312.
Further, the fume hood of the embodiment can be used as a variable air volume fume hood together with a control system, and the air entering amount at the front opening of the fume hood can be flexibly changed in a large range through the change of the position of the sliding window. Specifically, as shown in fig. 3 and 4, in the present embodiment, the hood further includes: a sliding window 804, the sliding window 804 being slidable along the front opening 110 for adjusting an opening area of the front opening 110; a position sensor 802, the position sensor 802 being provided in the top module 400, for detecting a position of the sliding window 804; a wind speed sensor 801 provided on an inner surface of one of the left and right side walls 103 in proximity to the front opening 110, the wind speed sensor 801 detecting a speed of air entering the working chamber 102 from the front opening 110 (hereinafter simply referred to as a surface wind speed); an infrared detector 803, the infrared detector 803 being disposed on the front wall of the top module 400, for detecting whether the experimenter is in the set area; and a control unit (not shown) which is located in the top module 400, is connected to the position sensor 802, the wind speed sensor 801, the infrared detector 803, the air supply fan 211 and the air supply valve 212, and the air discharge fan 311 and the air discharge valve 312, and adjusts the power and the opening degree of each of the air supply fan 211 and the air supply valve 212, and the air discharge fan 311 and the air discharge valve 312 based on the detection information of the position sensor 802, the wind speed sensor 801, and the infrared detector 803.
The infrared detector 803 may sense whether an experimenter is in a set working area, and if it is detected that no one is in the working area and the sliding window 804 of the fume hood is not in a closed state, the control unit may send a signal to a driving device (not shown) of the sliding window 804, close the sliding window 804, reduce air entering the working chamber from an indoor environment, and reduce energy consumption of a laboratory; in addition, after the sliding window 804 is closed, the air inlet amount of the fume hood is provided by the air supply ports A1-A3, and the air exhaust amount of the fume hood is reduced at the same time, so the system energy consumption of the fume hood is reduced.
On the other hand, when the opening of the sliding window 804 changes, the control unit receives the opening value of the sliding window sent by the position sensor 802, and calculates the ventilation hood exhaust volume required for maintaining the surface wind speed at the preset value according to the following formula:
Q＝V*S*3600(1)
q is the exhaust air volume of the working chamber 102 of the fume hood, in m3H; v is a preset value of the surface wind speed, and the unit is m/s; s is the ventilation cross-sectional area of the sliding window 804, i.e., the area of the front opening 110, and is expressed in m2Wherein, in the step (A),
S＝L*H(2)
l is a fixed value for the width (when the sliding window 804 moves up and down) or height (when the sliding window 804 moves left and right) of the sliding window 804; and H is the opening value of the sliding window 804 detected by the position sensor 802.
Then, the control unit adjusts the power of the exhaust fan 311 and the opening of the exhaust valve 312 according to the calculated exhaust air volume of the working chamber 102 of the fume hood and the exhaust air volume values of the bottom cabinet exhaust channels B1 and B2 of the bottom cabinet 105 at the preset surface wind speed, thereby changing the exhaust air volume of the whole fume hood. The power of the air supply fan 211 and the opening of the air supply valve 212 may be adjusted according to the detected values and calculated values, so as to change the air supply amount of the air supply system.
When a plurality of fume hoods are connected in parallel to a building ventilation system, the air supplement and exhaust amount required by each fume hood according to the use condition of the fume hood is different. In a parallel airflow system, the closer the system total power fan is, the larger the flow rate of gas which can be supplemented or discharged is; the further away from the total power fan of the system, the smaller the flow of air that can be supplemented or exhausted due to pressure drop and losses. Therefore, if the valve is not controlled, individual adjustment according to the use condition can not be realized by each ventilation cabinet only by the total power fan. In order to achieve the aim, most of the novel environment-friendly variable air volume ventilation cabinets on the market are provided with expensive Venturi valves. In the present embodiment, as described above, since the top module 400 is integrated with the fume hood itself, and the exhaust fan 311 and the exhaust valve 312, and the air supplement fan 211 and the air supplement valve 212, which can adjust power and opening according to actual conditions, are installed in the top module 400, and the power and opening of the fans and valves are adjusted by the automatic control system, the same function as that of the venturi valve can be achieved, and the structure is simple and convenient, the space is saved, and the installation cost and the maintenance cost of the fume hood are greatly reduced.
While the preferred embodiments of the present invention have been described above, the present invention is not limited to these embodiments, and various modifications can be made without departing from the spirit and scope of the invention.
For example, in the above-described embodiment, two air supply ports are provided in the upper portion of the cabinet, one air supply port is provided in the lower portion of the cabinet, and one air discharge region is provided in the upper portion of the cabinet and in a position close to the rear wall of the cabinet, but the positions and the number of the air supply ports and the air discharge region are not limited thereto as long as a push-pull type air flow pattern can be formed in the working chamber.
In the above embodiment, the air supply fan and the air discharge fan are each a power-adjustable fan, and the air supply valve and the air discharge valve are each a variable-opening valve, but the present invention is not limited thereto, and at least one of the fan and the valve may be set to be adjustable. In addition, under the condition of not adjusting the air quantity, the fixed power of the fan and the fixed opening degree of the valve can be set according to the distance between the fume hood and the total power fan of the system.
In the above embodiment, the air supply valve and the air discharge valve are provided on the downstream side in the air flow direction of the air supply fan and the air discharge fan, respectively, but the present invention is not limited to this, and the air supply valve and the air discharge valve may be provided on the upstream side in the air flow direction of the air supply fan and the air discharge fan, respectively.
In the above embodiment, the sliding window is provided to adjust the amount of air entering the front opening of the hood, but the present invention is not limited to this, and the sliding window may not be provided to reduce the cost when the adjustment of the amount of air entering is not necessary.
In the above embodiment, two bottom cabinets for storing reagents and materials required for an experiment are provided below the cabinet body, but the present invention is not limited thereto, and the number of the bottom cabinets may be appropriately set or not set as necessary. In addition, the number and the positions of the air exhaust channels of the bottom cabinet can be properly arranged corresponding to the number and the positions of the bottom cabinet.
In the above-described embodiment, the wind speed sensor for measuring the surface wind speed is provided on the inner surface of the side wall, but the present invention is not limited to this, and the wind speed sensor may be provided on the inner wall of the working chamber such as the bottom wall or the ceiling wall, as long as the surface wind speed can be detected without hindering the experimental operation.
In the above embodiment, the fume hood is a fume hood for a laboratory, but the fume hood of the present invention can be applied to any work requiring control and discharge of harmful substances in the air, for example, a wet etching cleaning system required in the semiconductor industry.
Claims (8)
1. A fumehood, comprising: a cabinet body, the inner cavity of which forms a working cavity, and the front wall of which is provided with a front opening which is open to the indoor environment; the air supplementing system is connected with an air supplementing channel of a building and used for supplementing air to the working cavity; and an exhaust system connected to an exhaust passage of the building to discharge the air introduced into the working chamber through the front opening and the air introduced into the working chamber through the air supply system from the working chamber,
the air supply system is respectively provided with at least one air supply opening at the upper part and the lower part of the cabinet body, the air supply opening supplies air towards the working cavity,
a top module is arranged above the cabinet body, an air supplementing fan and an air supplementing valve for the air supplementing system, and an exhaust fan and an exhaust valve for the exhaust system are arranged in the top module,
the air supplementing channels connecting the air supplementing fan and the air supplementing valve with the air supplementing openings are communicated with each other;
the left side wall and the right side wall of the cabinet body are of a hollow double-layer structure, and the air supplementing channel positioned at the upper part of the cabinet body is communicated with the air supplementing channel positioned at the lower part of the cabinet body through the hollow parts of the left side wall and the right side wall;
the control unit changes the air supplement amount of the air supplement system based on the air exhaust amount of the air exhaust system;
the ventilation cabinet is a variable air volume ventilation cabinet, and the air inlet amount at the front opening can be changed by changing the position of the sliding window;
each air supply port extends along the left width direction and the right width direction of the working cavity respectively, and the plurality of air supply ports comprise:
a first air supply opening located above the front opening, the first air supply opening being designed in a semi-cylindrical shape extending in a left-right width direction of the working chamber, the semi-cylindrical surface facing the working chamber;
a second air supply opening located below the front opening, the second air supply opening being formed in an 1/4 cylindrical shape extending in the left-right width direction of the working chamber, the 1/4 cylindrical surface facing the working chamber; and
a third air supply opening located at the upper part of the cabinet body and outside the front wall, the third air supply opening being designed to have a shape of 1/4 cylinder extending in the left-right width direction of the working chamber, the 1/4 cylinder facing the working chamber, the third air supply opening supplying air into the working chamber and below the cabinet body;
a first air supplementing channel stretching across the left and right width directions of the cabinet body is arranged at the upper part of the cabinet body, the first air supplementing channel connects the air supplementing valve with the first air supplementing opening, and one surface of the first air supplementing channel, which is close to the working cavity, is designed to be an inclined wall;
a second air supplementing channel crossing the left and right width directions of the cabinet body is arranged at the lower part of the cabinet body, and the second air supplementing channel conveys air from the air supplementing fan to the second air supplementing opening;
the upper part of the cabinet body is provided with a third air supplementing channel stretching across the left and right width directions of the cabinet body, the sliding window is inserted between the third air supplementing channel and the first air supplementing channel, the third air supplementing channel bypasses the sliding window and is communicated with the first air supplementing channel, so that air from an air supplementing fan is conveyed to a third air supplementing opening, and one surface, far away from the cabinet body, of the third air supplementing channel is designed to be an inclined wall.
2. A fumehood according to claim 1,
the air exhaust system is provided with an air exhaust area at the upper part of the cabinet body and close to the rear wall of the cabinet body, and the air exhaust area extends in the whole left and right width direction of the cabinet body and is connected with the air exhaust fan and the air exhaust valve.
3. A fumehood according to claim 2,
the working chamber has an inclined top wall extending obliquely rearward and upward from the first air supply opening toward the air exhaust region.
4. A fumehood according to claim 2,
a guide plate is arranged in the working cavity, the guide plate is vertically arranged close to the rear wall, the upper end part of the guide plate extends towards the air exhaust area,
the lower part of the guide plate is provided with a plurality of through holes which are distributed in the whole left and right width direction of the guide plate.
5. A fumehood according to claim 2,
at least one bottom cabinet is arranged below the cabinet body, the inner cavity of the bottom cabinet is communicated with the air exhaust area through a bottom cabinet air exhaust channel, and the bottom cabinet air exhaust channel is arranged in the hollow part of at least one side wall of the left side wall and the right side wall and extends along the vertical direction close to the rear wall.
6. A fumehood according to claim 2,
and flow deflectors are respectively arranged on the air supply ports.
7. A fumehood according to claim 2,
a protective grid surrounding the second air supply opening is arranged outside the second air supply opening,
and a protective grid surrounding the third air supply opening is arranged outside the third air supply opening.
8. A fumehood according to claim 1,
the air supply fan and the air exhaust fan are respectively power adjustable fans,
the air supply valve and the exhaust valve are respectively variable-opening valves,
the fume chamber still is equipped with:
a sliding window slidable along the front opening for adjusting an opening area of the front opening;
a position sensor provided in the top module for detecting a position of the sliding window;
a wind speed sensor disposed on an inner wall of the working chamber adjacent to the front opening for detecting a speed of air entering the working chamber from the front opening;
the infrared detector is arranged on the front wall of the top module and used for detecting whether an operator is in a set area; and
and the control unit is positioned in the top module, is connected with the position sensor, the wind speed sensor, the infrared detector, the air supplementing fan, the air supplementing valve and the air exhausting fan and the air exhausting valve, and adjusts the power of the air supplementing fan, the opening degree of the air supplementing valve, the power of the air exhausting fan and the opening degree of the air exhausting valve based on the detection information of the position sensor, the wind speed sensor and the infrared detector.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910073733.0A CN109530382A (en) | 2015-04-10 | 2015-04-10 | Vent cabinet |
| CN201510169620.2A CN106140769B (en) | 2015-04-10 | 2015-04-10 | Ventilation cabinet |
| CN201810444895.6A CN108435747A (en) | 2015-04-10 | 2015-04-10 | Vent cabinet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510169620.2A CN106140769B (en) | 2015-04-10 | 2015-04-10 | Ventilation cabinet |
Related Child Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810444895.6A Division CN108435747A (en) | 2015-04-10 | 2015-04-10 | Vent cabinet |
| CN201910073733.0A Division CN109530382A (en) | 2015-04-10 | 2015-04-10 | Vent cabinet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106140769A CN106140769A (en) | 2016-11-23 |
| CN106140769B true CN106140769B (en) | 2021-05-18 |
Family
ID=57336593
Family Applications (3)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810444895.6A Pending CN108435747A (en) | 2015-04-10 | 2015-04-10 | Vent cabinet |
| CN201510169620.2A Active CN106140769B (en) | 2015-04-10 | 2015-04-10 | Ventilation cabinet |
| CN201910073733.0A Pending CN109530382A (en) | 2015-04-10 | 2015-04-10 | Vent cabinet |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810444895.6A Pending CN108435747A (en) | 2015-04-10 | 2015-04-10 | Vent cabinet |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910073733.0A Pending CN109530382A (en) | 2015-04-10 | 2015-04-10 | Vent cabinet |
Country Status (1)
| Country | Link |
|---|---|
| CN (3) | CN108435747A (en) |
Families Citing this family (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108151222A (en) * | 2016-12-05 | 2018-06-12 | 王楚平 | Supplementary air type exhaust gas cabinet |
| CN107083896B (en) * | 2017-04-20 | 2018-05-04 | 倚世节能科技（上海）有限公司 | The power-assisted that tests the speed switchs control method, control system and the vent cabinet of sliding door |
| CN107282583A (en) * | 2017-08-08 | 2017-10-24 | 倚世节能科技（上海）有限公司 | A kind of mend wind passage of ventilation equipment |
| CN108220130A (en) * | 2018-02-09 | 2018-06-29 | 达尔（广州）生物科技有限公司 | The air channel structure of Biohazard Safety Equipment |
| CN108213020A (en) * | 2018-03-21 | 2018-06-29 | 苏州特福佳实验室系统工程有限公司 | Interior benefit wind energy-saving ventilation cabinet |
| CN110560446A (en) * | 2019-07-01 | 2019-12-13 | 广州三洛环保科技有限公司 | Ventilation cabinet |
| CN112762549A (en) * | 2019-11-04 | 2021-05-07 | 倚世节能科技（上海）有限公司 | Air supplementing structure and exhaust cabinet |
| CN111112271A (en) * | 2019-11-26 | 2020-05-08 | 广州柯美隆实验设备科技有限公司 | Adjustable speed-increasing and flow-stabilizing type physical and chemical safety cabinet |
| CN113134500A (en) * | 2020-01-19 | 2021-07-20 | 阮红正 | Exhaust cabinet |
| CN111195637B (en) * | 2020-03-10 | 2021-03-16 | 雷柏特（南通）实验室系统工程有限公司 | Novel interior tonifying wind exhaust cabinet |
| DE102020129412A1 (en) * | 2020-11-09 | 2022-05-12 | Lab-Concept GmbH | Exhaust device with volumetric flow control |
| CN112570412A (en) * | 2020-11-26 | 2021-03-30 | 重庆劲旗科技股份有限公司 | Active air supplement type multi-channel air suction cover |
| CN113020192B (en) * | 2021-04-14 | 2022-07-08 | 北京鸣远诺尔科技有限公司 | Parallel-type multi-linkage exhaust-controlled ventilation cabinet |
| CN113578910B (en) * | 2021-08-30 | 2024-07-23 | 青岛中科汉维实验室装备科技有限公司 | Low energy consumption air supplement type laboratory fume chamber |
| CN117225855A (en) * | 2022-06-17 | 2023-12-15 | 倚世节能科技（上海）有限公司 | Fume chamber |
| CN115318786B (en) * | 2022-08-03 | 2023-10-27 | 倚世节能科技（上海）有限公司 | Fume chamber |
| CN117046856B (en) * | 2023-10-12 | 2024-01-23 | 倚世节能科技（上海）有限公司 | Air quantity control method, exhaust cabinet and computer storage medium |
Family Cites Families (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3895570A (en) * | 1973-09-27 | 1975-07-22 | Baker Company Inc | Air-insulated work station |
| GB2064100B (en) * | 1979-11-28 | 1984-02-15 | Jennings H G F | Fume cupboard |
| JPS61957Y2 (en) * | 1980-11-12 | 1986-01-13 | ||
| US4528898A (en) * | 1984-03-05 | 1985-07-16 | Imec Corporation | Fume hood controller |
| US4741257A (en) * | 1985-01-09 | 1988-05-03 | Air Monitor Corporation | Fume hood air flow control |
| JPH0220041Y2 (en) * | 1985-02-27 | 1990-06-01 | ||
| US5240455A (en) * | 1991-08-23 | 1993-08-31 | Phoenix Controls Corporation | Method and apparatus for controlling a fume hood |
| JP3358969B2 (en) * | 1997-05-20 | 2002-12-24 | 株式会社イトーキクレビオ | Draft chamber |
| DE10146000A1 (en) * | 2001-09-18 | 2003-01-16 | Waldner Laboreinrichtungen | Fume cupboard for chemical laboratory uses additional air directed across its inner surfaces for preventing escape of fumes |
| JP2003269763A (en) * | 2002-03-12 | 2003-09-25 | Shimazu Rika Kikai Kk | Local exhauster |
| TWI289645B (en) * | 2003-07-29 | 2007-11-11 | Alps Electric Co Ltd | Clean bench |
| CN101274327A (en) * | 2006-12-28 | 2008-10-01 | 亚申科技研发中心（上海）有限公司 | Fume hood and method for operating the same |
| CN202012998U (en) * | 2011-01-28 | 2011-10-19 | 北京鸣远伟业实验室设备有限公司 | Air-supplementing type ventilation cabinet device |
| CN102652948B (en) * | 2011-03-04 | 2015-08-19 | 北京鸣远伟业实验室设备有限公司 | The control method of multiple stage vent cabinet in parallel |
| JP2013134015A (en) * | 2011-12-27 | 2013-07-08 | Hitachi Plant Technologies Ltd | Clean room facility, air volume control device, and air volume control method |
| CN103272818B (en) * | 2013-06-05 | 2014-02-26 | 广州穗剑实验室科技有限公司 | Novel energy-saving environment-friendly numerical-control fume hood of laboratory |
| CN203972435U (en) * | 2014-03-06 | 2014-12-03 | 中石化上海工程有限公司 | A kind of air-replenishing type ventilating cabinet |
| CN204710833U (en) * | 2015-04-10 | 2015-10-21 | 阮红正 | Vent cabinet |
-
2015
- 2015-04-10 CN CN201810444895.6A patent/CN108435747A/en active Pending
- 2015-04-10 CN CN201510169620.2A patent/CN106140769B/en active Active
- 2015-04-10 CN CN201910073733.0A patent/CN109530382A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| CN108435747A (en) | 2018-08-24 |
| CN109530382A (en) | 2019-03-29 |
| CN106140769A (en) | 2016-11-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106140769B (en) | Ventilation cabinet | |
| WO2016161834A1 (en) | Ventilating cabinet | |
| CN107497815B (en) | Ventilation cabinet | |
| WO2017156802A1 (en) | Flow stabilizing structure and ventilation device using same | |
| US6461233B1 (en) | Low air volume laboratory fume hood | |
| EP2014365B1 (en) | Air curtain-isolated biosafety cabinet | |
| KR20120031502A (en) | Fume extraction hood | |
| GB2064100A (en) | Fume cupboards | |
| CN111482205A (en) | Multifunctional biological safety cabinet | |
| US20210396394A1 (en) | Kitchen exhaust recovery system | |
| CN207463783U (en) | Vent cabinet | |
| CN115007590B (en) | Fume chamber | |
| CN217726586U (en) | Flow guide structure and fume chamber | |
| CN216790369U (en) | Distributed air supply duct machine and distributed air supply device | |
| CN110805937A (en) | Fume exhaust fan | |
| CN215980114U (en) | Multi-wind-path air supply structure and biological safety cabinet thereof | |
| CN206656428U (en) | Indoor apparatus of air conditioner | |
| CN112827992A (en) | Side ventilation type fume chamber | |
| CN106076021A (en) | Airflow distribution device in large-scale air flow duct system | |
| CN208587944U (en) | Air compensation device and supply and exhaust hearth system | |
| CN214683420U (en) | Side ventilation type fume chamber | |
| CN218574559U (en) | Ventilation cabinet with air supplement function | |
| CN216079986U (en) | Range hood with air curtain device | |
| CN214949583U (en) | Ventilation device with air passage | |
| CN213777918U (en) | Wall-mounted air conditioner indoor unit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: Fume hood Effective date of registration: 20220616 Granted publication date: 20210518 Pledgee: China Minsheng Banking Corp Shanghai branch Pledgor: E3 GREEN TECHNOLOGY Co.,Ltd. Registration number: Y2022310000061 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20230731 Granted publication date: 20210518 Pledgee: China Minsheng Banking Corp Shanghai branch Pledgor: E3 GREEN TECHNOLOGY Co.,Ltd. Registration number: Y2022310000061 |
|
| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: Ventilation cabinet Effective date of registration: 20230804 Granted publication date: 20210518 Pledgee: China Minsheng Banking Corp Shanghai branch Pledgor: E3 GREEN TECHNOLOGY Co.,Ltd. Registration number: Y2023310000435 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Granted publication date: 20210518 Pledgee: China Minsheng Banking Corp Shanghai branch Pledgor: E3 GREEN TECHNOLOGY Co.,Ltd. Registration number: Y2023310000435 |
|
| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: Ventilation cabinet Granted publication date: 20210518 Pledgee: China Minsheng Banking Corp Shanghai branch Pledgor: E3 GREEN TECHNOLOGY Co.,Ltd. Registration number: Y2024310000714 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right |