CN110566488B - Method and device for reducing air output reduction of fan - Google Patents
Method and device for reducing air output reduction of fan Download PDFInfo
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- CN110566488B CN110566488B CN201910738381.6A CN201910738381A CN110566488B CN 110566488 B CN110566488 B CN 110566488B CN 201910738381 A CN201910738381 A CN 201910738381A CN 110566488 B CN110566488 B CN 110566488B
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- 238000000034 method Methods 0.000 title claims abstract description 24
- 238000004804 winding Methods 0.000 claims description 13
- 238000011038 discontinuous diafiltration by volume reduction Methods 0.000 claims 1
- 230000000712 assembly Effects 0.000 abstract description 4
- 238000000429 assembly Methods 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 2
- 230000002401 inhibitory effect Effects 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
- F04D27/004—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids by varying driving speed
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
- F04D27/005—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids by changing flow path between different stages or between a plurality of compressors; Load distribution between compressors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
- F04D27/008—Stop safety or alarm devices, e.g. stop-and-go control; Disposition of check-valves
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention provides a method and a device for reducing the air output reduction of a fan, relates to the technical field of fan units, and solves the technical problem that air leaks when partial fans of fan assemblies with fans arranged side by side work. The method for reducing the air output reduction of the fan comprises the following steps: if the fan in the non-running state exists in the fan assembly and air leakage occurs, the non-running fan is started to rotate at a low speed or the non-running fan is operated to fix a rotor of the non-running fan so as to reduce the air leakage. The invention is used for reducing the air leakage condition of the fan assembly.
Description
Technical Field
The invention relates to the technical field of fan units, in particular to a method and a device for reducing the air output of a fan.
Background
When a row of fans operate together (the fans are arranged in a fan wall form), the air quantity of the air outlet is equal to the algebraic sum of the air quantity of each fan; when the operation environment changes, only a few of the fans need to operate, the remaining fans can be influenced by the wind pressure and reversely rotate, and then air leakage can be formed at the moment, so that the air volume of the air outlet is reduced.
The applicant has found that the prior art has at least the following technical problems:
the traditional technology is that a wind shield is arranged on a fan in a non-running state to inhibit air leakage and reduce the air output of the fan.
Disclosure of Invention
The invention aims to provide a method and a device for reducing the air output of a fan, and provides a new method for inhibiting air leakage aiming at the condition that part of fans of fan assemblies arranged side by side of the fan assemblies leak air during working. The technical effects that can be produced by the preferred technical scheme in the technical schemes provided by the invention are described in detail in the following.
In order to achieve the purpose, the invention provides the following technical scheme:
the invention provides a method for reducing the air output of a fan, which comprises the following steps: if the fan in the non-running state exists in the fan assembly and air leakage occurs, the non-running fan is started to rotate at a low speed or the non-running fan is operated to fix a rotor of the non-running fan so as to reduce the air leakage.
Further, the motors of the fans are all brushless direct current motors.
Further, the method of operating the non-operating fan to fix its rotor is as follows: and D, supplying direct current to the fan in the non-running state without changing the direction of the current on the stator winding, so that the stator winding generates a magnetic field to be mutually attracted with the permanent magnet rotor to fix the permanent magnet rotor.
Further, the rotation direction of the fan which is not operated is started to enable the fan to operate at a low speed to be the same as the rotation direction of the fan in the operation state.
Further, the fan assembly further comprises a wind pressure/wind speed sensor, and when the wind pressure/wind speed sensor detects that a wind signal exists at a wind port of the fan in the non-operating state, the wind pressure/wind speed sensor transmits the signal to the control device so that the control device controls the non-operating fan to act.
Further, an air inlet of the fan is provided with the wind pressure/wind speed sensor.
Further, when the wind pressure/wind speed sensor detects that a wind signal exists at a wind port of the fan in the non-operation state, the control module controls the non-operation fan to enable a rotor of the non-operation fan to be fixed.
Further, when the control module controls the rotor of the fan which is not operated to be in a locked state, if the wind pressure/wind speed sensor still detects that a wind signal exists at the wind port of the fan and the wind signal is within a preset range, the control module controls the fan to operate at a low speed.
Further, when the control module controls the fan which is not operated to operate at a low speed, if the wind pressure/wind speed sensor does not detect a wind signal or detects that the wind signal is lower than a preset value, the fan which rotates at the low speed maintains the rotating speed of the frequency band to continue rotating and operating.
An apparatus for implementing the method comprises a judging module and a control module, wherein: the judging module is used for judging whether an air signal exists at an air port of the fan in the non-running state or not and sending an instruction to the control module when judging that the air signal exists at the air port of the fan in the non-running state; and the control module is used for starting the non-operating fan to enable the non-operating fan to rotate at a low speed or controlling the non-operating fan to enable a rotor of the non-operating fan to be fixed when receiving the instruction.
The invention provides a method for reducing air output of a fan, which is characterized in that if a fan in a non-running state exists in a fan assembly and air leakage occurs, the non-running fan is started to rotate at a low speed or the non-running fan is operated to fix a rotor of the non-running fan so as to reduce the air leakage, and a new method for inhibiting the air leakage is provided aiming at the condition that part of the fans of the fan assemblies which are arranged side by side of the fans work and generate the air leakage.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic structural diagram illustrating the direction of airflow when all fans in a fan assembly operate together according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of airflow directions when a part of fans in the fan assembly provided by the embodiment of the invention operate.
FIG. 1-fan; 2-air inlet; and 3, air outlet.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.
Referring to fig. 1-2, the present invention provides a method for reducing the reduction of the air output of a fan, which comprises the following steps: if the fan 1 in the non-operating state exists in the fan assembly (the arrangement mode of the fans 1 in the fan assembly can be as shown in fig. 1 and fig. 2) and air leakage occurs, the non-operating fan 1 is started to rotate at a low speed or the non-operating fan 1 is operated to fix the rotor of the non-operating fan 1 so as to reduce the air leakage. Referring to fig. 1, when the fans 1 in the fan assembly operate together, the turning directions of all the fans 1 are the same, and the air volume of the air outlet 3 is equal to the algebraic sum of the air volume of each fan 1; when the operation condition changes or the load demand is smaller, only part of the fans 1 need to operate, and other fans 1 are in a power-off shutdown state (in the power-off shutdown state, namely in a non-operation state), however, referring to fig. 2, under the action of a wind field, wind of the fan 1 in the power-off shutdown state flows back along the fan blades, so that the fan 1 rotates reversely, at the moment, wind leakage is formed, the wind output is reduced, and in order to reduce the condition that the wind output is reduced due to the wind leakage, at the moment, the non-operation fans 1 can be operated to fix the rotors of the fans, so that the wind output is reduced due to the wind leakage; or, the fan 1 which is not operated is started to rotate at a low speed, and here, it should be noted that the rotation speed of the fan 1 does not increase the air output greatly, otherwise, the air output of the required size cannot be obtained. When the condition of air leakage is reduced by adopting the mode of low-speed rotation of the fan 1, the fan 1 which is not operated is started to enable the rotation direction of the low-speed operation to be the same as the rotation direction of the fan 1 in the operation state.
As an optional implementation manner of the embodiment of the present invention, the motors of the fans 1 are all brushless dc motors, and at this time, the method for operating the fan 1 that is not in operation to fix its rotor is as follows: the fan 1 in the non-running state is electrified with direct current and the direction of the current on the stator winding is not changed, so that the stator winding generates a magnetic field and the permanent magnet rotor is attracted to each other to fix the permanent magnet rotor. For the brushless direct current motor, the current on the stator winding of the brushless direct current motor can be always in one direction by changing the control mode, so that the stator winding generates a stable magnetic field, and the stator winding generates a magnetic field to interact with the permanent magnet rotor; referring to fig. 2, when an air current blows to the fan 1 in a non-operating state, the blades of the fan 1 cannot rotate due to the interaction between the stator winding magnetic field and the permanent magnet rotor. Here, to be described, if the air flow blown to the fan 1 in the non-operating state is relatively large, there may be a problem that the fan blade rotates by overcoming the interaction between the stator winding magnetic field and the permanent magnet rotor.
As an optional implementation manner of the embodiment of the present invention, the fan assembly further includes a wind pressure/wind speed sensor, and when the wind pressure/wind speed sensor detects that a wind signal exists at a wind port of the fan 1 in the non-operating state, the wind pressure/wind speed sensor transmits the signal to the control device so that the control device controls the non-operating fan 1 to operate. The air inlet 2 of the fan 1 is provided with a wind pressure/wind speed sensor, and the wind inlet 2 of each fan 1 can be provided with a wind pressure/wind speed sensor.
As an optional implementation manner of the embodiment of the present invention, when the wind pressure/wind speed sensor detects that a wind signal exists at the wind port of the fan 1 in the non-operating state, the control module controls the fan 1 in the non-operating state to fix the rotor thereof, that is, the motor of the fan 1 is a brushless dc motor, and supplies dc power to the fan 1 in the non-operating state without changing the direction of the current on the stator winding, so that the stator winding generates a magnetic field to attract the permanent magnet rotor to fix the permanent magnet rotor; when the control module controls the rotor of the fan 1 which is not operated to be in a locked state, if the wind pressure/wind speed sensor still detects that a wind signal exists at the wind port of the fan 1 and the wind signal is within a preset range, namely the detected wind pressure and wind speed are still relatively large, the control module controls the fan 1 to operate at a low speed (the rotation direction is the same as the rotation direction of the fan 1 in the operating state); when the control module controls the fan 1 which is not operated to operate at a low speed, if the wind pressure/wind speed sensor does not detect a wind signal or detects that the wind signal is lower than a preset value (namely the detected wind pressure and the detected wind speed are relatively low), the fan 1 which rotates at the low speed maintains the rotating speed of the frequency band to continue rotating and operating.
The device for implementing the method for reducing the air output reduction of the fan comprises a judgment module and a control module, wherein: the judging module is used for judging whether an air signal exists at the air port of the fan 1 in the non-running state or not and sending an instruction to the control module when judging that the air signal exists at the air port of the fan 1 in the non-running state; the control module is used for starting the fan 1 which does not operate to rotate at a low speed or controlling the fan 1 which does not operate to fix the rotor when receiving an instruction.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (8)
1. The method for reducing the air output reduction of the fan is characterized by comprising the following steps of:
if the fan (1) in the non-running state exists in the fan assembly and air leakage occurs, starting the fan (1) in the non-running state to rotate at a low speed or operating the fan (1) in the non-running state to fix a rotor of the fan (1) so as to reduce the air leakage;
the motors of the fan (1) are all brushless direct current motors;
the method for operating a non-operating fan (1) to fix its rotor is as follows: the fan (1) in the non-running state is electrified with direct current without changing the direction of the current on the stator winding, so that the stator winding generates a magnetic field and the permanent magnet rotor is attracted to each other to fix the permanent magnet rotor;
when detecting that the fan (1) in the non-operation state exists in the fan assembly and air leakage occurs, firstly operating the fan (1) in the non-operation state to fix the rotor of the fan, and if the air leakage amount is still detected to exceed the preset value, starting the fan (1) in the non-operation state to rotate at a low speed.
2. The method for reducing the air output reduction of the fan according to claim 1, characterized in that the rotational direction of the fan (1) which is not in operation is started to make the low-speed operation of the fan (1) in operation the same as the rotational direction of the fan (1) which is in operation.
3. A method for reducing fan air output reduction according to any one of claims 1-2, characterized in that the fan assembly further comprises a wind pressure/speed sensor, when the wind pressure/speed sensor detects that a wind signal exists at the wind outlet of the fan (1) in the non-operating state, the wind pressure/speed sensor transmits a signal to the control device to enable the control device to control the non-operating fan (1) to act.
4. The method for reducing the wind volume reduction of the fan according to claim 3, wherein the wind pressure/wind speed sensor is disposed at the wind inlet (2) of the fan (1).
5. The method for reducing the fan air output reduction according to claim 3, wherein when the air pressure/air speed sensor detects that an air signal is present at the air inlet of the fan (1) in the non-operating state, the control module controls the non-operating fan (1) to fix the rotor thereof.
6. The method for reducing the fan air output reduction according to claim 5, wherein when the control module controls the rotor of the fan (1) which is not in operation to be in the locked state, if the wind pressure/wind speed sensor still detects that the wind signal is present at the wind inlet of the fan (1) and the wind signal is within a preset range, the control module controls the fan (1) to operate at a low speed.
7. The method for reducing the fan air output reduction according to claim 6, wherein when the control module controls the fan (1) not operating at low speed, if the wind pressure/wind speed sensor does not detect the wind signal or detects that the wind signal is lower than a preset value, the fan (1) rotating at low speed maintains the rotating speed of the frequency band to continue rotating.
8. An apparatus for implementing the method of any of claims 1-7, comprising a determining module and a control module, wherein:
the judging module is used for judging whether an air signal exists at the air port of the fan (1) in the non-running state or not and sending an instruction to the control module when judging that the air signal exists at the air port of the fan (1) in the non-running state; the control module is used for starting the fan (1) which does not operate to enable the fan (1) to rotate at a low speed or controlling the fan (1) which does not operate to enable the rotor of the fan to be fixed when receiving an instruction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910738381.6A CN110566488B (en) | 2019-08-12 | 2019-08-12 | Method and device for reducing air output reduction of fan |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910738381.6A CN110566488B (en) | 2019-08-12 | 2019-08-12 | Method and device for reducing air output reduction of fan |
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| CN110566488A CN110566488A (en) | 2019-12-13 |
| CN110566488B true CN110566488B (en) | 2020-08-21 |
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| CN201910738381.6A Active CN110566488B (en) | 2019-08-12 | 2019-08-12 | Method and device for reducing air output reduction of fan |
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| CN112696314A (en) * | 2020-12-29 | 2021-04-23 | 诸暨和创电机科技有限公司 | Wind driven generator based on wind power braking mechanism |
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| JP2011179414A (en) * | 2010-03-01 | 2011-09-15 | Central Japan Railway Co | Fluid machine, and fluid machine operation control device |
| CN104454609A (en) * | 2014-11-17 | 2015-03-25 | 华唯金属矿产资源高效循环利用国家工程研究中心有限公司 | Mine ventilation system capable of preventing air current from being inverted and circulated and use method |
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| CN107975924A (en) * | 2017-11-07 | 2018-05-01 | 珠海格力电器股份有限公司 | Fan starting control method of multi-fan air conditioning system and air conditioning system |
| CN108561324A (en) * | 2018-03-01 | 2018-09-21 | 长沙格力暖通制冷设备有限公司 | Fan testing device, air conditioner and fan testing method of air conditioner |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9957971B2 (en) * | 2015-04-28 | 2018-05-01 | Asia Vital Components Co., Ltd. | Method for preventing a fan from burning down at activation |
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2019
- 2019-08-12 CN CN201910738381.6A patent/CN110566488B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10174277A (en) * | 1996-12-04 | 1998-06-26 | Matsushita Seiko Co Ltd | Controller of motor |
| JP2011179414A (en) * | 2010-03-01 | 2011-09-15 | Central Japan Railway Co | Fluid machine, and fluid machine operation control device |
| CN104454609A (en) * | 2014-11-17 | 2015-03-25 | 华唯金属矿产资源高效循环利用国家工程研究中心有限公司 | Mine ventilation system capable of preventing air current from being inverted and circulated and use method |
| CN104929966A (en) * | 2015-05-21 | 2015-09-23 | 珠海格力电器股份有限公司 | Device for preventing centrifugal fan from reversing and control method thereof |
| CN106065872A (en) * | 2016-08-12 | 2016-11-02 | 华能湖南岳阳发电有限责任公司 | One power plant blower fan anti-reverse mechanism and method thereof |
| CN107975924A (en) * | 2017-11-07 | 2018-05-01 | 珠海格力电器股份有限公司 | Fan starting control method of multi-fan air conditioning system and air conditioning system |
| CN108561324A (en) * | 2018-03-01 | 2018-09-21 | 长沙格力暖通制冷设备有限公司 | Fan testing device, air conditioner and fan testing method of air conditioner |
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| CN110566488A (en) | 2019-12-13 |
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