CN202037165U - Exhaust system for ventilation cabinets - Google Patents
Exhaust system for ventilation cabinets Download PDFInfo
- Publication number
- CN202037165U CN202037165U CN2011201527004U CN201120152700U CN202037165U CN 202037165 U CN202037165 U CN 202037165U CN 2011201527004 U CN2011201527004 U CN 2011201527004U CN 201120152700 U CN201120152700 U CN 201120152700U CN 202037165 U CN202037165 U CN 202037165U
- Authority
- CN
- China
- Prior art keywords
- vent cabinet
- cabinet
- position switch
- butterfly valve
- cabinet door
- 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.)
- Expired - Lifetime
Links
Images
Abstract
The utility model provides an exhaust system for ventilation cabinets, which belongs to the field of laboratory ventilation and comprises a group of ventilation cabinets (1), a static pressure box (5) and a variable-frequency exhaust fan (8), wherein a position switch (2) is respectively arranged on a cabinet door of each ventilation cabinet (1), a butterfly valve (4) is respectively arranged on an exhaust branch pipe (3) of each ventilation cabinet (1), an outlet of each exhaust branch pipe (3) is respectively connected into the static pressure box (5), the position switch (2) controls the opening degree of the butterfly valve (4) in an interlocking way, a pressure sensor (6) is arranged on the static pressure box (5) and controls the rotating speed of the variable-frequency exhaust fan (8), and further, the constant pressure of the static pressure box (5) is maintained. When the system is utilized, the exhaust air rate of the system can be automatically regulated according to the number of the used ventilation cabinets, the stable wind velocity of each ventilation cabinet surface can also be maintained when the exhaust air rate of the system is changed, on the premise of ensuring the safety, the operation cost is saved, and the investment cost of a variable-air-rate exhaust system is also reduced.
Description
Technical field
The utility model belongs to the laboratory ventilation field, is specifically related to a kind of vent cabinet exhaust system.
Background technology
Development and progress along with society, the energy consumption of the healthy and safe and system operation of laboratory worker more and more comes into one's own, and control healthy and safe to laboratory worker and the vent cabinet exhaust system that system's operation energy consumption has the greatest impact requires also more and more stricter thereupon.The face wind speed of vent cabinet is stabilized in about 0.5m/s when requiring to have the people to operate before vent cabinet usually.
At present, the vent cabinet exhaust system control method of three quasi-representatives is arranged: decide the air quantity exhaust system, bistable state exhaust system and variable air rate exhaust system.Typically decide the air quantity exhaust system and all move with maximum quantity of wind at system's run duration, operating cost is very high.Typical bistable system is to have people operating period system to move with maximum quantity of wind, unattended during system move with minimum air quantity; Running cost decreases than constant air volume system.Typical variable air volume system is that pressure independent type variable air rate exhaust valve is set on each vent cabinet air draft arm, according to the Lift of vent cabinet cabinet door, regulates the exhaust air rate of vent cabinet automatically, keeps the face wind speed of vent cabinet constant; Certain position in exhaust system is provided with pressure sensor, with the rotating speed of pressure sensor control frequency conversion fan, keeps the constant of this point pressure, and the assurance system can provide needed air quantity for each laboratory hood; The variation of one or several vent cabinet exhaust air rate in the system can not cause other vent cabinet face change of wind velocity, but can cause each variable air rate valve to produce " regulating vibration " in adaptive system air quantity change procedure; Be the method that operating cost is saved most at present, but investment cost is very high.
In the prior art, the patent No. is the vent cabinet exhaust control system of the disclosed many cooperatings of patent of CN101912863A, adopts the differential pressure pickup that is arranged on the air draft trunk line to control the rotating speed of blower fan.The aperture of the air-valve on the disclosed vent cabinet air draft of this patent arm by the differential pressure pickup or the control of hot blast sensor that are arranged on the arm, perhaps adopts the face wind speed of hot blast sensor measurement vent cabinet door to control.Because pressure reduction or wind speed variation that the vent cabinet door is opened on the big or small caused vent cabinet arm are not linear, and generally there are not enough straight lengths to come steady air flow in the actual engineering on the arm, cause being arranged on the arm differential pressure pickup or the measured data of hot blast sensor and bigger error can occur, therefore, this system can't accurately control vent cabinet face wind speed.Method for the face wind speed that adopts hot blast sensor measurement vent cabinet door, because the face wind speed of vent cabinet is not uniform, the face wind speed of the each point of vent cabinet not only is subjected to the influence of vent cabinet design itself, also be subjected in the cabinet the object of putting and the cabinet influence of the operating personnel's that stand position in front of the door, therefore in fact this method can't measure vent cabinet centre plane wind speed accurately, just can't guarantee that also the face wind speed of vent cabinet is a survival wind speed.In addition, when the air quantity that vent cabinet is arranged in the system changes, can cause the adjustment of other vent cabinet air-valve, produce system thus
"Regulate vibration ", and frequent adjustment can be quickened the wearing and tearing of air-valve executing agency.
The patent No. is that the patent of CN201333459Y only discloses a kind of vent cabinet with volume damper, rather than at the exhaust system of whole vent cabinet.This patent adopts the aperture of the aperture equal proportion control air-valve of cabinet door, because the adjustment curve of present volume damper can not be accomplished linear regulation, therefore the disclosed vent cabinet door of this patent moves up and down, when control volume damper equal proportion is rotated, in fact can not make the face wind speed of vent cabinet door keep constant.
Summary of the invention
The utility model is higher with typical bistable system operating cost at typically deciding the air quantity exhaust system, and the typical very high problem of variable air volume system investment cost, a kind of vent cabinet exhaust system is provided, can come the exhaust air rate of automatic regulating system according to the quantity of the vent cabinet that uses simultaneously, and when changing, the system exhaust air rate keeps the stable of vent cabinet face wind speed, and need not use special and expensive pressure independent type variable air rate exhaust valve, can move by low exhaust air rate under the premise that security is guaranteed, operating cost can be reduced, investment cost can be reduced again.
The utility model is achieved through the following technical solutions:
A kind of vent cabinet exhaust system, comprise one group of vent cabinet 1, a plenum chamber 5 and a frequency conversion exhaust blower 8, be provided with position switch 2 on the cabinet door of each vent cabinet 1, on the air draft arm 3 of each vent cabinet 1 butterfly valve 4 be housed all, the outlet of each air draft arm 3 all inserts plenum chamber 5; The aperture of described position switch 2 interlocked control butterfly valves 4;
Described plenum chamber 5 is provided with pressure sensor 6, rotating speed by pressure sensor 6 control frequency conversion exhaust blowers 8, and then keep the constant pressure of plenum chamber 5, make not changing of each vent cabinet face wind speed, keep the stable of each vent cabinet face wind speed with the variation of other caused system of vent cabinet door change in location exhaust air rate.
Described butterfly valve 4 adopts electronic or Pneumatic butterfly valve, and disposes fast speed actuating mechanism.
The cabinet door of vent cabinet 1 is provided with at least one position switch 2, and when a position switch 2 only was set, this position switch 2 was arranged on the minimum aperture place of cabinet door, the cabinet door reaches this position, butterfly valve 4 closes to the minimum aperture of setting, and the cabinet door leaves this position, and butterfly valve 4 is opened into the maximum aperture of setting.
When the quantity of the position switch 2 that is provided with during more than one, position switch 2 is separately positioned on the different opening place of cabinet door, and these apertures are corresponding with the different opening of butterfly valve 4.
Under the setting pressure of plenum chamber 5, the cabinet door of vent cabinet 1 is on position switch 2 residing Lifts the time, the aperture of position switch 2 pairing butterfly valves 4, and the face wind speed that just in time can keep vent cabinet 1 is 0.5m/s.
Described plenum chamber 5 is communicated with frequency conversion exhaust blower 8 by air draft main 7, is connected to aiutage 9 in the exit of frequency conversion exhaust blower 8.
Constant pressure just because of plenum chamber 5, the pairing air quantity of each valve position that has guaranteed the electronic or Pneumatic butterfly valve on the vent cabinet air draft arm 3 is constant, in any case thereby realized that vent cabinet cabinet door changes, the face wind speed of each vent cabinet can effectively be guaranteed, and has also just guaranteed the security of vent cabinet.
Simultaneously, the variation of caused butterfly valve 4 apertures of the height change of vent cabinet cabinet door, be bound to cause that the pressure of plenum chamber 5 changes, rotating speed by pressure sensor 6 control frequency conversion exhaust blowers 8, keep the constant pressure of plenum chamber 5, in fact just adjust the air quantity of exhaust blower, make it to be complementary with system needed air quantity, the system that realized has saved the operating cost of system satisfying under the condition of security with low exhaust air rate operation.And, because system only need carry out the adjusting of frequency conversion exhaust blower rotating speed when air quantity changes, need not electronic or pneumatic air draft butterfly valve and carry out the adaptability adjusting again, avoided " regulating vibration " of producing in the systematic air flow adjustment process.
Compared with prior art, the beneficial effects of the utility model are:
(1) the utility model can guarantee that vent cabinet face wind speed is not less than 0.5m/s in normal vent cabinet door operation scope, and the face wind speed is not subjected to the influence of other vent cabinet operation, has guaranteed the security of vent cabinet operation;
(2) the utility model with typically decide air quantity and compare with bistable system, owing to can regulate the air quantity of exhaust system automatically according to the actual usage quantity of vent cabinet, when changing, system's exhaust air rate keeps the stable of each vent cabinet face wind speed simultaneously, make system save the operating cost of system satisfying under the condition of security with low exhaust air rate operation;
(3) the utility model is compared with typical variable air volume system, owing to need not use special and expensive pressure independent type variable air rate exhaust valve, has saved investment cost; And because system only need carry out the adjusting of frequency conversion exhaust blower rotating speed when air quantity changes, need not exhaust valve and carry out the adaptability adjusting again, " regulating vibration " of having avoided typical variable air volume system to produce in the air quantity adjustment process reduced the wearing and tearing of control valve executing agency.
Description of drawings
Fig. 1 is the structural representation of the utility model vent cabinet exhaust system.
The specific embodiment
Below in conjunction with accompanying drawing the utility model is described in further detail:
As shown in Figure 1, a kind of vent cabinet exhaust system, a kind of vent cabinet exhaust system, comprise one group of vent cabinet 1, a plenum chamber 5 and a frequency conversion exhaust blower 8, on the cabinet door of each vent cabinet 1, be provided with position switch 2, on the air draft arm 3 of each vent cabinet 1 butterfly valve 4 is housed all, the outlet of each air draft arm 3 all inserts plenum chamber 5; The aperture of described position switch 2 interlocked control butterfly valves 4 makes the face wind speed of vent cabinet be not less than 0.5m/s; On described plenum chamber 5, pressure sensor 6 is set, represent motor by the M among pressure sensor 6 control frequency conversion exhaust blower 8(Fig. 1, VFD represents frequency converter) rotating speed, and then keep the constant pressure of plenum chamber 5, make not changing of each vent cabinet face wind speed, keep the stable of each vent cabinet face wind speed with the variation of other caused system of vent cabinet door change in location exhaust air rate.
Described butterfly valve 4 adopts electronic or Pneumatic butterfly valve, and disposes fast speed actuating mechanism.
The cabinet door of vent cabinet 1 is provided with at least one position switch 2, and when a position switch 2 only was set, this position switch 2 was arranged on the minimum aperture place of cabinet door, the cabinet door reaches this position, butterfly valve 4 closes to the minimum aperture of setting, and the cabinet door leaves this position, and butterfly valve 4 is opened into the maximum aperture of setting.
When the quantity of the position switch 2 that is provided with during more than one, position switch 2 is separately positioned on the different opening place of cabinet door, and these apertures are corresponding with the different opening of butterfly valve 4.
Under the setting pressure of plenum chamber 5, the cabinet door of vent cabinet 1 is on position switch 2 residing Lifts the time, and the face wind speed that the aperture of position switch 2 pairing butterfly valves 4 just in time can be kept vent cabinet is 0.5m/s.
Described plenum chamber 5 is communicated with frequency conversion exhaust blower 8 by air draft main 7, is connected to aiutage 9 in the exit of frequency conversion exhaust blower 8.
During actual the use, the quantity of position switch 2 is determined after according to laboratory operation managerial skills and investment cost comprehensive assessment.If the laboratory operation managerial skills are higher, the operation of vent cabinet door can be closed to minimum position with the cabinet door basically when closing, during unlatching the cabinet door is opened near maximum safe opening height, then can only a position switch be set at the minimum aperture place of vent cabinet door, the cabinet door reaches this position, interlock electronic or Pneumatic butterfly valve closes to minimum aperture, the cabinet door leaves this position, and the interlocking butterfly valve is opened into maximum opening.This moment, the executing agency of butterfly valve was switching value input control, and investment cost can effectively reduce.If the laboratory operation managerial skills are relatively low, need suitably to increase the quantity of position switch, on vent cabinet door limit 2 or 3 position switch are set, the different aperture of the corresponding butterfly valve of difference, realize the vent cabinet door in a certain Lift scope, the vent cabinet exhaust air rate is a certain specific numerical value, avoids occurring operating not in place because of lab assistant, make vent cabinet face wind speed excessive, cause the problem that security reduces and some particular experiment can't be carried out smoothly; This moment, the executing agency of butterfly valve need adopt analog quantity input control, and investment cost increases.
The utility model is provided with electronic or Pneumatic butterfly valve on the air draft arm of each vent cabinet, by the aperture of the position switch interlocked control butterfly valve of vent cabinet door; Electronic or Pneumatic butterfly valve disposes fast speed actuating mechanism, is no more than 3 seconds from the actuation time that a valve position arrives another valve position.Because butterfly valve is carried out and is swift in motion, butterfly valve has the advantages that its air quantity can improve rapidly along with the increase of aperture in addition, realized when the vent cabinet door is opened, air quantity can improve rapidly, guarantee the face wind speed when the vent cabinet door is opened, thereby guaranteed the security of vent cabinet operation in the cabinet door opening process; In like manner, because butterfly valve is carried out and is swift in motion, butterfly valve has the advantages that its air quantity can not reduce rapidly along with the minimizing of aperture in addition, realized when the cabinet door is closed, air quantity can not reduce rapidly, guaranteed the face wind speed when the vent cabinet door is closed, thereby guaranteed that the cabinet door closes the security of vent cabinet operation in the closed procedure.The setting principle of butterfly valve opening is, under the setting pressure of plenum chamber, vent cabinet cabinet door is on the residing Lift of position switch the time, the pairing butterfly valve opening of position switch, the face wind speed that just in time can keep vent cabinet is 0.5m/s, guarantee thus the vent cabinet door maximum safe opening height with interior any Lift on, the face wind speed of vent cabinet is not less than 0.5m/s, for two and above position switch, just in time when (any) position switch place, pairing wind speed of valve opening all is 0.5m/s to the cabinet door; The cabinet door is not when the position switch place, and the face wind speed all can be greater than 0.5m/s.
Under the common pipeline connected mode, the high velocity air that each vent cabinet is discharged influences each other, and the pressure on the pipeline is subjected to airflow influence very big, and ducted any certain any constant pressure can not guarantee that all the pressure of each branch vent under the various situations is constant.The variable air rate exhaust valve is exactly because will solve because the connected mode of common pipe, thereby the cabinet door operation can cause the whole system pressure oscillation to cause that the air quantity of the vent cabinet of being served changes and then cause that vent cabinet face wind speed changes this problem and will open the size adjustment air quantity according to the vent cabinet door constant with the face wind speed that keeps vent cabinet, that just does is very complicated and accurate, therefore wants expensive a lot of relatively.
Usually be in order to obtain stable air-supply static pressure with plenum chamber, perhaps with the connectivity problem that solves in the air-line system, and the utility model utilizes the pressure of constant plenum chamber to solve in one group of vent cabinet owing to adopting that common valve produces because the cabinet door operation causes interactional problem, this is because plenum chamber can change the air-flow dynamic pressure of each vent cabinet air draft arm into static pressure rapidly, and in plenum chamber, static pressure is a basically identical, so just can eliminate influencing each other between each vent cabinet air draft arm substantially.
The utility model is from the control of system's realization to vent cabinet and system thereof, carries out spacing control by the position switch on the vent cabinet door, rather than continuous control.The cabinet door can guarantee that at spacing height place vent cabinet face wind speed is constant.On other position, can guarantee that vent cabinet face wind speed is not less than survival wind speed.
The utility model is applicable to that the operational administrative level is higher, and vent cabinet is arranged concentrated relatively, and scale is not very big laboratory.Be subjected in investment under the situation of certain limitation, use the security that this system can both guarantee the laboratory hood operation, can reduce systematic running cost again and use.
Technique scheme is a kind of embodiment of the present utility model, for those skilled in the art, on the basis that the utility model discloses application process and principle, be easy to make various types of improvement or distortion, and be not limited only to the described method of the above-mentioned specific embodiment of the utility model, therefore previously described mode is just preferred, and does not have restrictive meaning.
Claims (5)
1. vent cabinet exhaust system, it is characterized in that: described vent cabinet exhaust system comprises one group of vent cabinet (1), a plenum chamber (5) and frequency conversion exhaust blower (8), on the cabinet door of each vent cabinet (1), be provided with position switch (2), on the air draft arm (3) of each vent cabinet (1) butterfly valve (4) is housed all, the outlet of each air draft arm (3) all inserts plenum chamber (5); The aperture of described position switch (2) interlocked control butterfly valve (4);
Described plenum chamber (5) is provided with pressure sensor (6), by the rotating speed of pressure sensor (6) control frequency conversion exhaust blower (8), and then keeps the constant pressure of plenum chamber (5).
2. vent cabinet exhaust system according to claim 1, it is characterized in that: the cabinet door of described vent cabinet (1) is provided with at least one position switch (2), when a position switch (2) only is set, this position switch (2) is arranged on the minimum aperture place of cabinet door, be that the cabinet door is when reaching this position, butterfly valve (4) closes to the minimum aperture of setting, and when the cabinet door left this position, butterfly valve (4) was opened into the maximum aperture of setting;
When the quantity of the position switch (2) that is provided with during more than one, position switch (2) is separately positioned on the different opening place of cabinet door, and these apertures of cabinet door are corresponding with the different opening of butterfly valve (4).
3. vent cabinet exhaust system according to claim 1 and 2, it is characterized in that: under the setting pressure of described plenum chamber (5), the cabinet door of vent cabinet (1) is on the residing Lift of position switch (2) time, the aperture of the pairing butterfly valve of position switch (2) (4), the face wind speed of just in time keeping vent cabinet (1) is 0.5m/s.
4. vent cabinet exhaust system according to claim 1 is characterized in that: described butterfly valve (4) adopts electronic or Pneumatic butterfly valve, and disposes fast speed actuating mechanism.
5. vent cabinet exhaust system according to claim 1 is characterized in that: described plenum chamber (5) is communicated with frequency conversion exhaust blower (8) by air draft main (7), is connected to aiutage (9) in the exit of frequency conversion exhaust blower (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201527004U CN202037165U (en) | 2011-05-13 | 2011-05-13 | Exhaust system for ventilation cabinets |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201527004U CN202037165U (en) | 2011-05-13 | 2011-05-13 | Exhaust system for ventilation cabinets |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202037165U true CN202037165U (en) | 2011-11-16 |
Family
ID=44964631
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201527004U Expired - Lifetime CN202037165U (en) | 2011-05-13 | 2011-05-13 | Exhaust system for ventilation cabinets |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202037165U (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102486331A (en) * | 2011-09-30 | 2012-06-06 | 武汉科贝科技有限公司 | System for controlling variable air rate ventilating laboratory in segments |
| CN102553878A (en) * | 2012-02-24 | 2012-07-11 | 郑家伟 | Static air exhausting device for laboratory |
| CN102620392A (en) * | 2012-03-15 | 2012-08-01 | 昆山大百科实验室设备工程有限公司 | Laboratory ventilation control system |
| CN102716889A (en) * | 2012-06-06 | 2012-10-10 | 北京信高实验室设备有限公司 | Control system and control method of surface air speed of fume hood |
| CN103691725A (en) * | 2013-12-23 | 2014-04-02 | 广西南宁百会药业集团有限公司 | Ventilation system of pharmaceutical workshop |
| CN105750291A (en) * | 2016-04-06 | 2016-07-13 | 包头轻工职业技术学院 | Ventilation cabinet |
| CN106765954A (en) * | 2016-12-23 | 2017-05-31 | 同济大学 | Airduct becomes air draft amount control device and control method |
| CN107321139A (en) * | 2017-08-20 | 2017-11-07 | 佛山市亚科恒远科技有限公司 | A kind of emission-control equipment |
| CN108302726A (en) * | 2016-09-26 | 2018-07-20 | 苏州天弘益华机电有限公司 | A kind of laboratory multistage ventilated energy-saving control system |
| CN113441508A (en) * | 2021-05-20 | 2021-09-28 | 广东天赐湾实验室装备制造有限公司 | Cabinet type experiment workstation |
-
2011
- 2011-05-13 CN CN2011201527004U patent/CN202037165U/en not_active Expired - Lifetime
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102486331B (en) * | 2011-09-30 | 2013-08-07 | 武汉科贝科技有限公司 | System for controlling variable air rate ventilating laboratory in segments |
| CN102486331A (en) * | 2011-09-30 | 2012-06-06 | 武汉科贝科技有限公司 | System for controlling variable air rate ventilating laboratory in segments |
| CN102553878A (en) * | 2012-02-24 | 2012-07-11 | 郑家伟 | Static air exhausting device for laboratory |
| CN102620392A (en) * | 2012-03-15 | 2012-08-01 | 昆山大百科实验室设备工程有限公司 | Laboratory ventilation control system |
| CN102716889B (en) * | 2012-06-06 | 2015-01-14 | 北京信高实验室设备有限公司 | Control system and control method of surface air speed of fume hood |
| CN102716889A (en) * | 2012-06-06 | 2012-10-10 | 北京信高实验室设备有限公司 | Control system and control method of surface air speed of fume hood |
| CN103691725A (en) * | 2013-12-23 | 2014-04-02 | 广西南宁百会药业集团有限公司 | Ventilation system of pharmaceutical workshop |
| CN105750291A (en) * | 2016-04-06 | 2016-07-13 | 包头轻工职业技术学院 | Ventilation cabinet |
| CN105750291B (en) * | 2016-04-06 | 2018-01-16 | 包头轻工职业技术学院 | A kind of vent cabinet |
| CN108302726A (en) * | 2016-09-26 | 2018-07-20 | 苏州天弘益华机电有限公司 | A kind of laboratory multistage ventilated energy-saving control system |
| CN106765954A (en) * | 2016-12-23 | 2017-05-31 | 同济大学 | Airduct becomes air draft amount control device and control method |
| CN107321139A (en) * | 2017-08-20 | 2017-11-07 | 佛山市亚科恒远科技有限公司 | A kind of emission-control equipment |
| CN113441508A (en) * | 2021-05-20 | 2021-09-28 | 广东天赐湾实验室装备制造有限公司 | Cabinet type experiment workstation |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202037165U (en) | Exhaust system for ventilation cabinets | |
| CN102486331B (en) | System for controlling variable air rate ventilating laboratory in segments | |
| CN205372921U (en) | Adaptive variable blast volume air conditioner air supply fan speed controller | |
| CN202229353U (en) | Segmentation control variable air volume ventilating system of laboratory | |
| US20110300790A1 (en) | Control device for ventilation and air conditioning systems | |
| CN102029203A (en) | Control system of laboratory variable air volume (VAV) fume hood | |
| CN109612045A (en) | A kind of gravity-flow ventilation suitable for building conditioning in Transition Season and force ventilation converting system | |
| CN202813643U (en) | Air exhausting control system of frequency-conversion variable air rate laboratory | |
| CN109144151A (en) | Environmental control system is given up in livestock-raising field | |
| CN101672509A (en) | Air-conditioning control technique with variable air quantity based on enthalpy value control | |
| CN205783585U (en) | A kind of laboratory self adaptation variable air rate visualization ventilated control system | |
| CN102716889B (en) | Control system and control method of surface air speed of fume hood | |
| CN105075546A (en) | Barn ventilating system and method | |
| CN103452884A (en) | Roof ventilation machine with automatic smoke exhaust function and automatic air valve size regulation function | |
| CN204968613U (en) | Granary ventilation system | |
| CN201373525Y (en) | Anti-epidemic ventilation system of box-type incubator | |
| CN105588302A (en) | CIT dead-zone-free rapid pressure regulation system | |
| CN101158497A (en) | Control system for controlling the direction of airflow at clean chamber doorway | |
| CN209639210U (en) | A kind of gravity-flow ventilation suitable for building conditioning in Transition Season and force ventilation converting system | |
| CN202958772U (en) | Precise and automatically-controlled channel dehumidification system for bulk curing barn | |
| CN203571959U (en) | Natural ventilation device with controllable ventilation rate | |
| CN205641270U (en) | Variable blast volume central air -conditioning system | |
| CN206176661U (en) | Warm and humid regulator of intelligent ventilation | |
| CN206139614U (en) | Fume chamber with air regulation push -pull valve | |
| CN202092275U (en) | Multi-station automatic frequency conversion energy-saving ventilation and dust removal system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 100728 Beijing, Chaoyangmen, North Street, No. 22, No. Co-patentee after: Sinopec Engineering Incorporation Patentee after: China Petrochemical Group Corp. Address before: 100728 Beijing, Chaoyangmen, North Street, No. 22, No. Co-patentee before: Engrg Construction Co., SINOPEC Patentee before: China Petrochemical Group Corp. |
|
| ASS | Succession or assignment of patent right |
Owner name: SINOPEC ENGINEERING INCORPORATION Free format text: FORMER OWNER: SINOPEC GROUP Effective date: 20130114 Free format text: FORMER OWNER: SINOPEC ENGINEERING INCORPORATION Effective date: 20130114 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 100728 CHAOYANG, BEIJING TO: 100101 CHAOYANG, BEIJING |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20130114 Address after: Anhui Beili Anyuan 21 No. 100101 Beijing Chaoyang District City Patentee after: Sinopec Engineering Incorporation Address before: 100728 Beijing, Chaoyangmen, North Street, No. 22, No. Patentee before: China Petrochemical Group Corp. Patentee before: Sinopec Engineering Incorporation |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20111116 |