CN107490122A - Blower fan system - Google Patents
Blower fan system Download PDFInfo
- Publication number
- CN107490122A CN107490122A CN201710823473.5A CN201710823473A CN107490122A CN 107490122 A CN107490122 A CN 107490122A CN 201710823473 A CN201710823473 A CN 201710823473A CN 107490122 A CN107490122 A CN 107490122A
- Authority
- CN
- China
- Prior art keywords
- pipeline
- exhaust pipeline
- standby
- blower fan
- fan system
- 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.)
- Pending
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F7/00—Ventilation
- F24F7/04—Ventilation with ducting systems, e.g. by double walls; with natural circulation
- F24F7/06—Ventilation with ducting systems, e.g. by double walls; with natural circulation with forced air circulation, e.g. by fan positioning of a ventilator in or against a conduit
- F24F7/08—Ventilation with ducting systems, e.g. by double walls; with natural circulation with forced air circulation, e.g. by fan positioning of a ventilator in or against a conduit with separate ducts for supplied and exhausted air with provisions for reversal of the input and output systems
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/0001—Control or safety arrangements for ventilation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
Abstract
The invention provides a kind of blower fan system, the blower fan system includes：Main exhaust pipeline, main exhaust pipeline is with treating that air exhausting device connects；Standby exhaust pipeline, standby exhaust pipeline is with treating that air exhausting device connects；Switch pipeline, the first end of switching pipeline connects with main exhaust pipeline, second end of switching pipeline connect with standby exhaust pipeline, switches pipeline with making the communicating position that main exhaust pipeline is connected with standby exhaust pipeline, and the detent position for making main exhaust pipeline mutually be obstructed with standby exhaust pipeline；Control unit, control unit be arranged on switching pipeline on, when main exhaust pipeline can not air draft when, control unit control switching pipeline be switched to communicating position from detent position.After main exhaust pipeline breaks down, control unit works and controls switching pipeline to be switched to communicating position from detent position, and then standby exhaust pipeline is worked, and continues to complete air draft work, realizes and automatically switch.
Description
Technical field
The present invention relates to exhaust equipment technical field, in particular to a kind of blower fan system.
Background technology
When using super-pressure, a resuperheat, twin-cylinder double flow, Direct Air-Cooled condensing turbine, system host
Lubricating oil smoke evacuation system is equipped with two smoke exhaust fans, and this two smoke exhaust fans are single-stage single-suction horizontal centrifugal blower, and it is made
With being to extract the flue gas in fuel tank and oil return system through smoke exhaust fan out, side by side to air.
An important system equipment of the smoke exhaust fan as unit operation in steam turbine lubricating oil system, effect predominantly with
It is lower 2 points：First, the incondensable gas and oil smoke in fuel tank are discharged, oily emulsification will not be made because vapor is mixed into oil；2nd,
Fuel tank micro-vacuum state is maintained, makes oil return unimpeded, avoids bearing housing oil leak outward.The continuity of the operation of system equipment and reliable
Property is directly connected to the safe and stable operation of unit.
Referring to Fig. 1, power generator turbine lubricating oil smoke evacuation system is mainly separated by valve 1, pipeline 2, smoke exhaust fan 3, oil smoke
The devices such as device form.
System is furnished with two mist extractor blower fans, and during operation, an operation, another standby, and when smoke exhaust fan is run, its is right
The manually-operated gate that should be exported is shown in a fully open operation, and the manually-operated gate of the outlet of standby smoke exhaust fan is in full off state, with
The short circuit backflow of anti-locking system flue gas and standby fan reverse.Because the valve of intrinsic smoke exhaust fan outlet is Hand-operated butterfly valve,
In smoke exhaust fan operation troubles, and switch to standby fan operation when.Because fan outlet valve is Hand-operated butterfly valve, in standby fan
After startup, standby fan outlet valve can not automatically open up, the valve of failure fan outlet can not close automatically, cause be
System can not realize the automatic switchover of smoke evacuation system blower fan, it is necessary to which operations staff carries out manual switching to scene, so as to cause to discharge fume
The outage of system, influence safety and the operation of unit.The smoke exhaust fan electric interlock of the system is using single simultaneously
Blower motor running status electric interlock, such as the disengagement of blower fan axle fracture, blower fan occurs in smoke exhaust fan system and does not contribute failure
When, non-blower fan electric loop fault trip, will not the operation of interlocked startup standby fan, the equally safe operation to unit brings wind
Danger.
The content of the invention
, can not be certainly to solve blower fan system of the prior art it is a primary object of the present invention to provide a kind of blower fan system
The problem of dynamic cut-in stand-by blower fan.
To achieve these goals, the invention provides a kind of blower fan system, the blower fan system to include：Main exhaust pipeline,
Main exhaust pipeline is with treating that air exhausting device connects；Standby exhaust pipeline, standby exhaust pipeline is with treating that air exhausting device connects；Switching pipe
Road, the first end for switching pipeline connect with main exhaust pipeline, and the second end for switching pipeline connects with standby exhaust pipeline, switching pipe
Road has and makes the communicating position that main exhaust pipeline is connected with standby exhaust pipeline, and makes main exhaust pipeline and standby exhaust pipeline
The mutually detent position of barrier；Control unit, control unit be arranged on switching pipeline on, when main exhaust pipeline can not air draft when, control unit
Control switching pipeline is switched to communicating position from detent position.
Further, blower fan system also includes：Main air blower, main air blower are arranged in main exhaust pipeline；Standby fan, it is standby
Blower fan is arranged in standby exhaust pipeline.
Further, blower fan system also includes outer row pipeline, and outer row pipeline is connected with switching pipeline.
Further, between main exhaust pipeline and standby exhaust pipeline, control unit includes outer row pipeline：First is unidirectional
Non-return valve, the first inlet non return check valve are arranged between outer row pipeline and main exhaust pipeline, the check direction of the first inlet non return check valve
For direction to the direction of main exhaust pipeline of standby exhaust pipeline.
Further, control unit also includes：Second inlet non return check valve, the second inlet non return check valve be arranged on outer row pipeline with it is standby
With between exhaust pipeline, the check direction of the second inlet non return check valve is direction to the side of main exhaust pipeline of standby exhaust pipeline
To.
Further, blower fan system also includes test section, and test section is arranged on switching pipeline, for detecting control unit
Working condition.
Further, test section includes the first proximity switch, and the first proximity switch is disposed adjacent with the first inlet non return check valve.
Further, test section includes the second proximity switch, and the second proximity switch is disposed adjacent with the second inlet non return check valve.
Further, blower fan system also includes first manual butterfly valve, and first manual butterfly valve is arranged on the first inlet non return check valve
On switching pipeline between outer row pipeline.
Further, blower fan system also includes the second Hand-operated butterfly valve, and the second Hand-operated butterfly valve is arranged on the second inlet non return check valve
On switching pipeline between outer row pipeline.
Apply the technical scheme of the present invention, due to the present invention blower fan system include main exhaust pipeline, standby exhaust pipeline,
Switch pipeline and control unit, after main exhaust pipeline breaks down, control unit works and controls switching pipeline to be cut from detent position
Communicating position is changed to, and then standby exhaust pipeline is worked, continues to complete air draft work.
Brief description of the drawings
The Figure of description for forming the part of the application is used for providing a further understanding of the present invention, and of the invention shows
Meaning property embodiment and its illustrate be used for explain the present invention, do not form inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 diagrammatically illustrates the structure chart of existing power generator turbine lubricating oil smoke evacuation system；And
Fig. 2 diagrammatically illustrates the structure chart of the embodiment of the blower fan system of the present invention；
Fig. 3 diagrammatically illustrates the structure chart of the switching pipeline location of the blower fan system of the present invention.
Wherein, above-mentioned accompanying drawing marks including the following drawings：
10th, main exhaust pipeline；20th, standby exhaust pipeline；30th, pipeline is switched；40th, air exhausting device is treated；50th, main air blower；60、
Standby fan；70th, outer row pipeline；81st, the first inlet non return check valve；82nd, the second inlet non return check valve；91st, the first proximity switch；92、
Second proximity switch；93rd, first manual butterfly valve；94th, the second Hand-operated butterfly valve.
Embodiment
It should be noted that in the case where not conflicting, the feature in embodiment and embodiment in the application can phase
Mutually combination.Describe the present invention in detail below with reference to the accompanying drawings and in conjunction with the embodiments.
It is noted that described further below is all exemplary, it is intended to provides further instruction to the application.It is unless another
Indicate, all technologies used herein and scientific terminology are with usual with the application person of an ordinary skill in the technical field
The identical meanings of understanding.
It should be noted that term used herein above is merely to describe embodiment, and be not intended to restricted root
According to the illustrative embodiments of the application.As used herein, unless the context clearly indicates otherwise, otherwise singulative
It is also intended to include plural form, additionally, it should be understood that, when in this manual using term "comprising" and/or " bag
Include " when, it indicates existing characteristics, step, operation, device, component and/or combinations thereof.
It should be noted that term " first " in the description and claims of this application and above-mentioned accompanying drawing, "
Two " etc. be for distinguishing similar object, without for describing specific order or precedence.It should be appreciated that so use
Term can exchange in the appropriate case, so that presently filed embodiment described herein for example can be with except herein
Order beyond those of diagram or description is implemented.
In addition, term " comprising " and " having " and their any deformation, it is intended that cover it is non-exclusive include, example
Such as, process, method, system, product or the equipment for containing series of steps or unit are not necessarily limited to those clearly listed
Step or unit, but may include not list clearly or for intrinsic other of these processes, method, product or equipment
Step or unit.
For the ease of description, space relative terms can be used herein, as " ... on ", " ... top ",
" ... upper surface ", " above " etc., for describing such as a device shown in the figure or feature and other devices or spy
The spatial relation of sign.It should be appreciated that space relative terms are intended to comprising the orientation except device described in figure
Outside different azimuth in use or operation.
For example, if the device in accompanying drawing is squeezed, it is described as " above other devices or construction " or " in other devices
On part or construction " device after will be positioned as or " in other devices or constructing it " below other devices or construction "
Under ".Thus, exemplary term " in ... top " can include " in ... top " and " in ... lower section " two kinds of orientation.Should
Device can also other different modes positioning (being rotated by 90 ° or in other orientation), it is and relative to space used herein above
Respective explanations are made in description.
As described in background technology, the valve of existing smoke exhaust fan outlet is Hand-operated butterfly valve, in smoke exhaust fan
Operation troubles, and switch to standby fan operation when.It is standby after standby fan startup because fan outlet valve is Hand-operated butterfly valve
It can not be automatically opened up with the valve of fan outlet, the valve of failure fan outlet can not close automatically, cause system real
The automatic switchover of existing smoke evacuation system blower fan is, it is necessary to which operations staff carries out manual switching to scene, so as to cause the fortune of smoke evacuation system
Row interrupts, and influences safety and the operation of unit.The smoke exhaust fan electric interlock of the system uses single blower motor simultaneously
Running status electric interlock, when failure is not contributed in the generation of smoke exhaust fan the system such as disengagement of blower fan axle fracture, blower fan, non-blower fan
Electric loop fault trip, will not the operation of interlocked startup standby fan, the equally safe operation to unit brings risk.
In order to solve the above problems, referring to shown in Fig. 2 and Fig. 3, the invention provides a kind of blower fan system, the blower fan system
Including main exhaust pipeline 10, standby exhaust pipeline 20, switching pipeline 30 and control unit, wherein, main exhaust pipeline 10 is with treating air draft
Device 40 connects；Standby exhaust pipeline 20 is with treating that air exhausting device 40 connects；Switch the first end of pipeline 30 and main exhaust pipeline 10
Connection, switching pipeline 30 the second end connected with standby exhaust pipeline 20, switching pipeline 30 with make main exhaust pipeline 10 with it is standby
The communicating position being connected with exhaust pipeline 20, and the closing position for making main exhaust pipeline 10 be obstructed with the standby phase of exhaust pipeline 20
Put；Control unit is arranged on switching pipeline 30, when main exhaust pipeline 10 can not air draft when, control unit control switching pipeline 30 is from envelope
Closed position is switched to communicating position.During installation, the control unit in the present invention is arranged on switching pipeline 30 by staff, works as master
After exhaust pipeline 10 breaks down, control unit works and controls switching pipeline 30 to be switched to communicating position from detent position, and then
Standby exhaust pipeline 20 is worked, continue to complete air draft work.
Specifically, the blower fan system in the present invention also includes main air blower 50 and standby fan 60, and main air blower 50 is arranged on
In main exhaust pipeline 10；Standby fan 60 is arranged in standby exhaust pipeline 20.Air draft is unable to when main air blower 50 breaks down
Afterwards, control device control standby fan 60 rotation carries out air draft.
In order to which gas is expelled into external environment condition, it is preferable that the blower fan system in the present invention also includes outer row pipeline 70, outside
Row pipeline 70 is connected with switching pipeline 30.When main exhaust pipeline 10 works, main air blower 50 rotates passes through outer comb by gas
Road is blown out, and after main exhaust pipeline 10 breaks down, standby fan 60, which rotates, blows out gas by outer row pipeline.
Specifically, the outer row pipeline 70 in the present invention is between main exhaust pipeline 10 and standby exhaust pipeline 20, control
Portion processed includes the first inlet non return check valve 81, and the first inlet non return check valve 81 is arranged between outer row pipeline 70 and main exhaust pipeline 10,
The check direction of first inlet non return check valve 81 is direction to the direction of main exhaust pipeline 10 of standby exhaust pipeline 20.When main air draft
During 10 normal work of pipeline, the work of the first inlet non return check valve, standby exhaust pipeline is blocked to make gas to the direction of main exhaust pipeline
Blowout is concentrated by the main air blower 50 in main exhaust pipeline, avoids the reversing of standby fan 60.
Preferably, the control unit in the present invention also includes the second inlet non return check valve 82, and the second inlet non return check valve 82 is arranged on
Between outer row pipeline 70 and standby exhaust pipeline 20, the check direction of the second inlet non return check valve 82 is the direction of main exhaust pipeline 10
To the direction of standby exhaust pipeline 20.When main exhaust pipeline 10 can not normal work when, the second inlet non return check valve 82 works, block
Main exhaust pipeline makes gas concentrate blowout by the standby fan in standby exhaust pipeline, avoided to the direction of standby exhaust pipeline
The reversing of main air blower.
In order that staff can detect the work clothes money of blower fan system in real time, it is preferable that the blower fan in the present invention
System also includes test section, and test section is arranged on switching pipeline 30, for detecting the working condition of control unit.Wherein, control
The working condition in portion includes：First inlet non return check valve 81 opens work, while the second inlet non return check valve 82 is closed, i.e., main exhaust duct
Working condition during 10 normal work of road；First inlet non return check valve 81 is closed, and the second inlet non return check valve 82 is opened, i.e., main exhaust duct
Road 10 is broken down, the working condition that standby exhaust pipeline is started working；And first inlet non return check valve 81 and second unidirectional inverse
Only valve 82 is turned off, i.e., the state that blower fan system of the invention is stopped.
Specifically, the test section in the present invention includes the first proximity switch 91, the first proximity switch 91 and first unidirectional
Non-return valve 81 is disposed adjacent, and when main exhaust pipeline normal work, the first inlet non return check valve 81 is opened, and the first proximity switch 91 is examined
The opening of the first inlet non return check valve 81 is measured, data transfer is gone out, to prompt staff that current blower fan system works
Normally.After main exhaust pipeline 10 breaks down, because main air blower is no longer dried, the first inlet non return check valve 81 is closed, and first connects
Nearly switch 91 detects that the first inlet non return check valve 81 is closed, and data transfer is gone out, and one to prompt the current blower fan of staff
System breaks down, specially main air blower failure.
Preferably, the test section in the present invention includes the second proximity switch 92, and the second proximity switch 92 is unidirectional inverse with second
Only valve 82 is disposed adjacent.Its operation principle is consistent with above-mentioned first proximity switch, repeats no more here.
After breaking down, part-structure is changed in order to facilitate staff, it is preferable that the blower fan in the present invention
System also includes first manual butterfly valve 93, and first manual butterfly valve 93 is arranged between the first inlet non return check valve 81 and outer row pipeline 70
Switching pipeline 30 on.Blower fan system in the present invention also includes the second Hand-operated butterfly valve 94, and the second Hand-operated butterfly valve 94 is arranged on
On switching pipeline 30 between two inlet non return check valves 82 and outer row pipeline 70.
As can be seen from the above description, the above embodiments of the present invention realize following technique effect：
Because the blower fan system of the present invention includes main exhaust pipeline, standby exhaust pipeline, switching pipeline and control unit, work as master
After exhaust pipeline breaks down, control unit works and controls switching pipeline to be switched to communicating position from detent position, and then makes standby
Worked with exhaust pipeline, continue to complete air draft work, realize and automatically switch.
The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the invention, for the skill of this area
For art personnel, the present invention can have various modifications and variations.Within the spirit and principles of the invention, that is made any repaiies
Change, equivalent substitution, improvement etc., should be included in the scope of the protection.
Claims (10)
- A kind of 1. blower fan system, it is characterised in that including：Main exhaust pipeline (10), the main exhaust pipeline (10) is with treating that air exhausting device (40) connects；Standby exhaust pipeline (20), the standby exhaust pipeline (20) treat that air exhausting device (40) connects with described；Switch pipeline (30), the first end of the switching pipeline (30) connects with the main exhaust pipeline (10), the switching pipe Second end on road (30) connects with the standby exhaust pipeline (20), it is described switching pipeline (30) have make the main exhaust pipeline (10) communicating position being connected with the standby exhaust pipeline (20), and make the main exhaust pipeline (10) and the standby row The detent position that air pipe line (20) mutually obstructs；Control unit, the control unit are arranged on switching pipeline (30), when the main exhaust pipeline (10) can not air draft when, The control unit control switching pipeline (30) is switched to the communicating position from the detent position.
- 2. blower fan system according to claim 1, it is characterised in that the blower fan system also includes：Main air blower (50), the main air blower (50) are arranged on the main exhaust pipeline (10)；Standby fan (60), the standby fan (60) are arranged on the standby exhaust pipeline (20).
- 3. blower fan system according to claim 1, it is characterised in that the blower fan system also includes outer row pipeline (70), The outer row pipeline (70) is connected with the switching pipeline (30).
- 4. blower fan system according to claim 3, it is characterised in that the outer row pipeline (70) is located at the main exhaust duct Between road (10) and the standby exhaust pipeline (20), the control unit includes：First inlet non return check valve (81), first inlet non return check valve (81) are arranged on the outer row pipeline (70) and the main row Between air pipe line (10), the check direction of first inlet non return check valve (81) for the standby exhaust pipeline (20) direction extremely The direction of the main exhaust pipeline (10).
- 5. blower fan system according to claim 4, it is characterised in that the control unit also includes：Second inlet non return check valve (82), second inlet non return check valve (82) be arranged on the outer row pipeline (70) with it is described standby Between exhaust pipeline (20), the check direction of second inlet non return check valve (82) for the main exhaust pipeline (10) direction extremely The direction of the standby exhaust pipeline (20).
- 6. blower fan system according to claim 5, it is characterised in that the blower fan system also includes test section, the inspection Survey portion is arranged on the switching pipeline (30), for detecting the working condition of the control unit.
- 7. blower fan system according to claim 6, it is characterised in that the test section includes the first proximity switch (91), First proximity switch (91) is disposed adjacent with first inlet non return check valve (81).
- 8. blower fan system according to claim 7, it is characterised in that the test section includes the second proximity switch (92), Second proximity switch (92) is disposed adjacent with second inlet non return check valve (82).
- 9. blower fan system according to claim 4, it is characterised in that the blower fan system also includes first manual butterfly valve (93), the first manual butterfly valve (93) is arranged between first inlet non return check valve (81) and the outer row pipeline (70) Switch on pipeline (30).
- 10. blower fan system according to claim 5, it is characterised in that the blower fan system also includes the second Hand-operated butterfly valve (94), second Hand-operated butterfly valve (94) is arranged between second inlet non return check valve (82) and the outer row pipeline (70) Switch on pipeline (30).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710823473.5A CN107490122A (en) | 2017-09-13 | 2017-09-13 | Blower fan system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710823473.5A CN107490122A (en) | 2017-09-13 | 2017-09-13 | Blower fan system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107490122A true CN107490122A (en) | 2017-12-19 |
Family
ID=60652272
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710823473.5A Pending CN107490122A (en) | 2017-09-13 | 2017-09-13 | Blower fan system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107490122A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110834969A (en) * | 2019-11-12 | 2020-02-25 | 国家能源集团泰州发电有限公司 | Automatic sediment collecting system that arranges of coal pulverizer stone coal |
| CN113983658A (en) * | 2021-10-18 | 2022-01-28 | 珠海格力电器股份有限公司 | Main and standby exhaust fan switching system and method under indoor negative pressure environment |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS597822A (en) * | 1982-07-05 | 1984-01-17 | Hitachi Ltd | Duct for waste gas |
| CN202012488U (en) * | 2010-12-11 | 2011-10-19 | 巨石集团有限公司 | Automatic switching device for double fan blower |
| CN203907639U (en) * | 2014-05-29 | 2014-10-29 | 上海鹭发电气(集团)有限公司 | Efficient fume extractor |
| CN204644390U (en) * | 2015-03-26 | 2015-09-16 | 麦格瑞冶金工程技术（北京）有限公司 | A kind of stand-by fan automatic switching control device |
| CN206458514U (en) * | 2016-12-26 | 2017-09-01 | 大唐陕西发电有限公司渭河热电厂 | A kind of steam turbine main fuel tank exhaust apparatus |
-
2017
- 2017-09-13 CN CN201710823473.5A patent/CN107490122A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS597822A (en) * | 1982-07-05 | 1984-01-17 | Hitachi Ltd | Duct for waste gas |
| CN202012488U (en) * | 2010-12-11 | 2011-10-19 | 巨石集团有限公司 | Automatic switching device for double fan blower |
| CN203907639U (en) * | 2014-05-29 | 2014-10-29 | 上海鹭发电气(集团)有限公司 | Efficient fume extractor |
| CN204644390U (en) * | 2015-03-26 | 2015-09-16 | 麦格瑞冶金工程技术（北京）有限公司 | A kind of stand-by fan automatic switching control device |
| CN206458514U (en) * | 2016-12-26 | 2017-09-01 | 大唐陕西发电有限公司渭河热电厂 | A kind of steam turbine main fuel tank exhaust apparatus |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110834969A (en) * | 2019-11-12 | 2020-02-25 | 国家能源集团泰州发电有限公司 | Automatic sediment collecting system that arranges of coal pulverizer stone coal |
| CN113983658A (en) * | 2021-10-18 | 2022-01-28 | 珠海格力电器股份有限公司 | Main and standby exhaust fan switching system and method under indoor negative pressure environment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP2201666B1 (en) | Power generation system and method for preventing overspeeding of a turbine driven generator | |
| CN104421139B (en) | Compressor operating control method and device | |
| CN105298735B (en) | A kind of safe and reliable scaled bulb tubular hydraulic generator is opened, halt control method | |
| CN107490122A (en) | Blower fan system | |
| US11668534B2 (en) | Fan array fault response control system | |
| CN105864086A (en) | Fully automatic starting control system for high-speed centrifugal blower | |
| CN108134327A (en) | It is a kind of air-cooled except condensation system and its except condensation method | |
| CN109059211B (en) | Shutdown control method and controller for variable frequency system with enhanced vapor injection | |
| JP2005241121A (en) | Air conditioner | |
| CN106246247A (en) | A kind of thermal power plant's Turbo-generator Set lubricating oil system and on off control method thereof | |
| CN107887824A (en) | A kind of terminal box intelligence convection current wind heating and dehumidification integrated system and method | |
| CN206054012U (en) | A kind of thermal power plant's Turbo-generator Set lubricating oil system | |
| CN105864087A (en) | Fully automatic starting control method for high-speed centrifugal blower | |
| CN104896683B (en) | Dropping equipment, air-conditioning system, air conditioning control method and device | |
| CN113280499B (en) | Condensed water treatment device and control method thereof | |
| CN213656286U (en) | Novel connecting pipeline, pipeline device and fan lubricating system | |
| CN206496665U (en) | Jetting steam bleeding system | |
| CN206903913U (en) | A kind of more Fans automatic linkage systems | |
| CN208950952U (en) | The sealing system of condensate pump | |
| CN107923682A (en) | Freezing cycle device and its method to set up | |
| CN210473126U (en) | Oil-water separation device for sealing oil of vacuum pump | |
| CN206293876U (en) | A kind of blower fan power supply circuit | |
| CN212250105U (en) | Ventilation system for overhauling and rescuing channel | |
| CN214501307U (en) | Cooling air device for fire detection | |
| JP3795996B2 (en) | Air conditioner |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20171219 |