CN112576535A - Variable frequency control method for marine fan - Google Patents
Variable frequency control method for marine fan Download PDFInfo
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- CN112576535A CN112576535A CN202011418142.1A CN202011418142A CN112576535A CN 112576535 A CN112576535 A CN 112576535A CN 202011418142 A CN202011418142 A CN 202011418142A CN 112576535 A CN112576535 A CN 112576535A
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- 238000006243 chemical reaction Methods 0.000 claims abstract description 21
- 230000000630 rising effect Effects 0.000 claims abstract description 5
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- 238000010586 diagram Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
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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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63J—AUXILIARIES ON VESSELS
- B63J2/00—Arrangements of ventilation, heating, cooling, or air-conditioning
- B63J2/02—Ventilation; Air-conditioning
- B63J2/06—Ventilation; Air-conditioning of engine rooms
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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
- F04D25/00—Pumping installations or systems
- F04D25/16—Combinations of two or more pumps ; Producing two or more separate gas flows
- F04D25/166—Combinations of two or more pumps ; Producing two or more separate gas flows using fans
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Ocean & Marine Engineering (AREA)
- Control Of Positive-Displacement Air Blowers (AREA)
Abstract
The invention discloses a variable frequency control method of a marine fan, which adopts a special variable frequency control system of the marine fan and comprises a control unit, a first fan set and a second fan set, wherein the first fan set is connected between engine cabins through a first air supply pipeline, the second fan set is connected between the engine cabins through a second air supply pipeline, and the variable frequency control method of the marine fan comprises the following steps: the control unit operates according to a mode I or a mode II; in the first mode, along with the increase of the air volume, the fans are started in the sequence of a first variable frequency fan, a second non-variable frequency fan, a second variable frequency fan and a first non-variable frequency fan; and in the second mode, along with the rising of the air quantity, the fans are started in the sequence of a first variable frequency fan, a second non-variable frequency fan and a first non-variable frequency fan. Under the condition of achieving the same air supply effect, the invention reduces two variable frequency fans and two frequency converters, realizes the purpose of frequency conversion, saves electric energy and reduces the risk of harmonic waves of a power grid.
Description
Technical Field
The invention belongs to the technical field of ship construction, and particularly relates to a variable frequency control method for a marine fan.
Background
The frequency conversion design of the marine fan is generally provided with four frequency conversion fans, each frequency conversion fan is provided with a frequency converter, the air quantity of each frequency conversion fan is controlled by the respective frequency converter through a control unit, and if the frequency conversion fans stop operating, an outlet air brake of each frequency conversion fan is closed. The frequency conversion fan is more costly than the non-frequency conversion fan, and frequency conversion equipment is too much, which can cause the problem of power grid harmonic wave.
Therefore, how to design a frequency conversion logic can realize the frequency conversion function of the fan, achieve the energy-saving effect, and reduce the number of the frequency conversion fan and the frequency converter as much as possible, thereby becoming a problem to be solved urgently.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a variable frequency control method for a marine fan, which can realize the same variable frequency function under the condition of reducing the number of variable frequency fans and frequency converters, save electric energy and reduce the risk of power grid harmonic waves.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention provides a variable frequency control method of a marine fan, which adopts a special variable frequency control system of the marine fan and comprises a control unit, a first fan set and a second fan set, wherein the first fan set is connected between engine cabins through a first air supply pipeline, the second fan set is connected between the engine cabins through a second air supply pipeline,
the first fan set comprises a first variable frequency fan and a first non-variable frequency fan, the control unit is connected with the first variable frequency fan through a first frequency converter, the control unit is connected with the first non-variable frequency fan, the air outlet of the first variable frequency fan is connected with the first air supply pipeline, the air outlet of the first non-variable frequency fan is connected with the first air supply pipeline,
the second fan set comprises a second variable frequency fan and a second non-variable frequency fan, the control unit is connected with the second variable frequency fan through a second frequency converter, the control unit is connected with the second non-variable frequency fan, the air outlet of the second variable frequency fan is connected with the second air supply pipeline, the air outlet of the second non-variable frequency fan is connected with the second air supply pipeline,
the frequency conversion control method of the marine fan comprises the following steps:
the control unit operates according to a mode I or a mode II;
in the first mode, along with the increase of the air volume, the fans are started in the sequence of a first variable frequency fan, a second non-variable frequency fan, a second variable frequency fan and a first non-variable frequency fan;
and in the second mode, along with the rising of the air quantity, the fans are started in the sequence of a first variable frequency fan, a second non-variable frequency fan and a first non-variable frequency fan.
As a preferred technical solution, the first mode includes the following steps:
step one, when the required air volume between the engine rooms is small, a first variable frequency fan operates and starts at the lowest frequency, air is supplied to the engine rooms at the minimum discharge capacity, and along with the increase of the air volume for equipment between the engine rooms, a first frequency converter raises the frequency of the first variable frequency fan, and the air supply volume of the first variable frequency fan is increased;
step two, when the first variable frequency fan reaches the maximum frequency and the air supply quantity cannot meet the air quantity requirement between the engine rooms, the second non-variable frequency fan is started, the first variable frequency fan runs at the lowest frequency, and the first frequency converter raises the frequency of the first variable frequency fan along with the increase of the air quantity for equipment between the engine rooms;
step three, when the first variable frequency fan reaches the maximum frequency and the air supply quantity cannot meet the air quantity requirement between the engine rooms, the second variable frequency fan is started, the first variable frequency fan runs at the lowest frequency, the second variable frequency fan runs at the highest frequency, the second non-variable frequency fan runs simultaneously, and the first frequency converter raises the frequency of the first variable frequency fan along with the increase of the air quantity for equipment between the engine rooms;
and step four, when the first variable frequency fan reaches the maximum frequency and the air supply quantity can not meet the air quantity requirement between the engine cabins, the first non-variable frequency fan and the second non-variable frequency fan operate simultaneously, and the first variable frequency fan and the second variable frequency fan operate at the same frequency to meet the air quantity requirement between the engine cabins.
The preferable technical scheme comprises the following steps:
s1, when the required air volume between the engine rooms is small, the first variable frequency fan is started to operate at the lowest frequency, air is supplied to the engine rooms at the minimum discharge capacity, and along with the increase of the air volume for equipment between the engine rooms, the first frequency converter raises the frequency of the first variable frequency fan, and the air supply volume of the first variable frequency fan is increased;
s2, when the first variable frequency fan reaches the maximum frequency and the air supply quantity cannot meet the air quantity requirement between the engine cabins, the second variable frequency fan is started, and the first variable frequency fan and the second variable frequency fan operate at the same frequency to meet the air quantity requirement between the engine cabins;
s3, when the first variable frequency fan and the second variable frequency fan reach the maximum frequency and the air supply quantity cannot meet the air quantity requirement between the engine rooms, the second non-variable frequency fan is opened, the first variable frequency fan runs at the lowest frequency, the second variable frequency fan runs at the highest frequency, and the first frequency converter increases the frequency of the first variable frequency fan along with the increase of the air quantity for equipment between the engine rooms;
and S4, when the first variable frequency fan reaches the maximum frequency and the air supply volume cannot meet the air volume requirement between the engine cabins, the first non-variable frequency fan and the second non-variable frequency fan operate simultaneously, and the first variable frequency fan and the second variable frequency fan operate at the same frequency to meet the air volume requirement between the engine cabins.
As a preferred technical solution, the maximum frequency of the first variable frequency fan is equal to the maximum frequency of the second variable frequency fan, and the frequency of the first non-variable frequency fan is equal to the frequency of the second non-variable frequency fan.
As a preferred technical scheme, the air outlets of the first variable frequency fan and the first non-variable frequency fan are respectively connected with a first air supply pipeline through an air brake, and the air outlets of the second variable frequency fan and the second non-variable frequency fan are respectively connected with a second air supply pipeline through an air brake.
Compared with the prior art, the invention has the beneficial effects that: compared with the conventional mode, the invention reduces two variable frequency fans and two frequency converters under the condition of achieving the same air supply effect, realizes the purpose of frequency conversion, saves electric energy and reduces the risk of power grid harmonic waves.
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 of a variable frequency control system of a marine fan according to the present invention.
Fig. 2 is a control mode diagram of a first mode of the variable frequency control method of the marine fan according to the invention.
Fig. 3 is a control mode diagram of a mode two of the marine fan frequency conversion control method of the invention.
Wherein the reference numerals are specified as follows: the system comprises a first variable frequency fan 1, a first non-variable frequency fan 2, a second variable frequency fan 3, a second non-variable frequency fan 4, a first frequency converter 5, a second frequency converter 6, an air brake 7, a control unit 8 and a cabin 9.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive effort based on the embodiments of the present invention, are within the scope of the present invention.
Example 1
The embodiment provides a variable frequency control method for a marine fan, which adopts a special variable frequency control system for the marine fan, and comprises a control unit 8, a first fan unit and a second fan unit, wherein the first fan unit is connected with an engine room 9 through a first air supply pipeline, and the second fan unit is connected with the engine room 9 through a second air supply pipeline. The first fan set comprises a first variable frequency fan 1 and a first non-variable frequency fan 2, a control unit 8 is connected with the first variable frequency fan 1 through a first frequency converter 5, the control unit 8 is connected with the first non-variable frequency fan 2, an air outlet of the first variable frequency fan 1 is connected with a first air supply pipeline, and an air outlet of the first non-variable frequency fan 2 is connected with the first air supply pipeline. The second fan set comprises a second variable frequency fan 3 and a second non-variable frequency fan 4, the control unit 8 is connected with the second variable frequency fan 3 through a second frequency converter 6, the control unit 8 is connected with the second non-variable frequency fan 4, an air outlet of the second variable frequency fan 3 is connected with a second air supply pipeline, and an air outlet of the second non-variable frequency fan 4 is connected with the second air supply pipeline. The air outlets of the first variable frequency fan 1 and the first non-variable frequency fan 2 are respectively connected with a first air supply pipeline through an air brake 7, and the air outlets of the second variable frequency fan 3 and the second non-variable frequency fan 4 are respectively connected with a second air supply pipeline through an air brake 7. The maximum frequency of the first variable frequency fan 1 is equal to the maximum frequency of the second variable frequency fan 3 and the frequency of the first non-variable frequency fan 2 is equal to the frequency of the second non-variable frequency fan 4.
Example 2
The embodiment provides a frequency conversion control method for a marine fan, which comprises the following steps:
along with the rising of the air quantity, the fans are started in the sequence of a first variable frequency fan 1, a second non-variable frequency fan 4, a second variable frequency fan 3 and a first non-variable frequency fan 2. The method specifically comprises the following steps:
step one, when the required air volume of the cabin room 9 is small, the first variable frequency fan 1 is operated and started at the lowest frequency, air is supplied to the cabin room 9 at the smallest discharge capacity, and along with the increase of the air volume of equipment used in the cabin room 9, the first frequency converter 5 raises the frequency of the first variable frequency fan 1, and the air supply volume of the first variable frequency fan 1 is raised;
step two, when the first variable frequency fan 1 reaches the maximum frequency and the air supply quantity cannot meet the air quantity requirement of the cabin 9, the second non-variable frequency fan 4 is started, the first variable frequency fan 1 runs at the lowest frequency, and the first frequency converter 5 raises the frequency of the first variable frequency fan 1 along with the increase of the air quantity for equipment in the cabin 9;
step three, when the first variable frequency fan 1 reaches the maximum frequency and the air supply quantity cannot meet the air quantity requirement of the cabin 9, the second variable frequency fan 3 is started, the first variable frequency fan 1 operates at the lowest frequency, the second variable frequency fan 3 operates at the highest frequency, the second non-variable frequency fan 4 operates simultaneously, and the first frequency converter 5 raises the frequency of the first variable frequency fan 1 along with the increase of the air quantity used by equipment in the cabin 9;
and step four, when the first variable frequency fan 1 reaches the maximum frequency and the air supply quantity can not meet the air quantity requirement of the cabin 9, the first non-variable frequency fan 2 and the second non-variable frequency fan 4 operate simultaneously, and the first variable frequency fan 1 and the second variable frequency fan 3 operate at the same frequency to meet the air quantity requirement of the cabin 9.
Example 3
The embodiment provides a frequency conversion control method for a marine fan, which comprises the following steps: along with the rising of the air quantity, the fans are started in the sequence of a first variable frequency fan 1, a second variable frequency fan 3, a second non-variable frequency fan 4 and a first non-variable frequency fan 2. The method specifically comprises the following steps:
s1, when the required air volume of the cabin room 9 is small, the first variable frequency fan 1 is started to operate at the lowest frequency, air is supplied to the cabin room 9 at the smallest discharge capacity, and along with the increase of the air volume of equipment in the cabin room 9, the first frequency converter 5 raises the frequency of the first variable frequency fan 1, and the air supply volume of the first variable frequency fan 1 is raised;
s2, when the first variable frequency fan 1 reaches the maximum frequency and the air supply quantity cannot meet the air quantity requirement of the cabin space 9, the second variable frequency fan 3 is started, and the first variable frequency fan 1 and the second variable frequency fan 3 operate at the same frequency to meet the air quantity requirement of the cabin space 9;
s3, when the first variable frequency fan 1 and the second variable frequency fan 3 reach the maximum frequency and the air supply quantity cannot meet the air quantity requirement of the cabin 9, the second non-variable frequency fan 4 is opened, the first variable frequency fan 1 runs at the lowest frequency, the second variable frequency fan 3 runs at the highest frequency, and the first frequency converter 5 raises the frequency of the first variable frequency fan 1 along with the increase of the air quantity used by equipment in the cabin 9;
and S4, when the first variable frequency fan 1 reaches the maximum frequency and the air supply volume cannot meet the air volume requirement of the cabin 9, the first non-variable frequency fan 2 and the second non-variable frequency fan 4 operate simultaneously, and the first variable frequency fan 1 and the second variable frequency fan 3 operate at the same frequency to meet the air volume requirement of the cabin 9.
Although the present invention has been described in detail with respect to the above embodiments, it will be understood by those skilled in the art that modifications or improvements based on the disclosure of the present invention may be made without departing from the spirit and scope of the invention, and these modifications and improvements are within the spirit and scope of the invention.
Claims (5)
1. A variable frequency control method for a marine fan is characterized in that a special variable frequency control system for the marine fan is adopted, the variable frequency control system comprises a control unit, a first fan set and a second fan set, the first fan set is connected between engine cabins through a first air supply pipeline, the second fan set is connected between the engine cabins through a second air supply pipeline,
the first fan set comprises a first variable frequency fan and a first non-variable frequency fan, the control unit is connected with the first variable frequency fan through a first frequency converter, the control unit is connected with the first non-variable frequency fan, the air outlet of the first variable frequency fan is connected with the first air supply pipeline, the air outlet of the first non-variable frequency fan is connected with the first air supply pipeline,
the second fan set comprises a second variable frequency fan and a second non-variable frequency fan, the control unit is connected with the second variable frequency fan through a second frequency converter, the control unit is connected with the second non-variable frequency fan, the air outlet of the second variable frequency fan is connected with the second air supply pipeline, the air outlet of the second non-variable frequency fan is connected with the second air supply pipeline,
the frequency conversion control method of the marine fan comprises the following steps:
the control unit operates according to a mode I or a mode II;
in the first mode, along with the increase of the air volume, the fans are started in the sequence of a first variable frequency fan, a second non-variable frequency fan, a second variable frequency fan and a first non-variable frequency fan;
and in the second mode, along with the rising of the air quantity, the fans are started in the sequence of a first variable frequency fan, a second non-variable frequency fan and a first non-variable frequency fan.
2. The frequency conversion control method of the marine wind turbine according to claim 1, wherein the first mode comprises the following steps:
step one, when the required air volume between the engine rooms is small, a first variable frequency fan operates and starts at the lowest frequency, air is supplied to the engine rooms at the minimum discharge capacity, and along with the increase of the air volume for equipment between the engine rooms, a first frequency converter raises the frequency of the first variable frequency fan, and the air supply volume of the first variable frequency fan is increased;
step two, when the first variable frequency fan reaches the maximum frequency and the air supply quantity cannot meet the air quantity requirement between the engine rooms, the second non-variable frequency fan is started, the first variable frequency fan runs at the lowest frequency, and the first frequency converter raises the frequency of the first variable frequency fan along with the increase of the air quantity for equipment between the engine rooms;
step three, when the first variable frequency fan reaches the maximum frequency and the air supply quantity cannot meet the air quantity requirement between the engine rooms, the second variable frequency fan is started, the first variable frequency fan runs at the lowest frequency, the second variable frequency fan runs at the highest frequency, the second non-variable frequency fan runs simultaneously, and the first frequency converter raises the frequency of the first variable frequency fan along with the increase of the air quantity for equipment between the engine rooms;
and step four, when the first variable frequency fan reaches the maximum frequency and the air supply quantity can not meet the air quantity requirement between the engine cabins, the first non-variable frequency fan and the second non-variable frequency fan operate simultaneously, and the first variable frequency fan and the second variable frequency fan operate at the same frequency to meet the air quantity requirement between the engine cabins.
3. The frequency conversion control method of the marine wind turbine according to claim 1, wherein the second mode comprises the following steps:
s1, when the required air volume between the engine rooms is small, the first variable frequency fan is started to operate at the lowest frequency, air is supplied to the engine rooms at the minimum discharge capacity, and along with the increase of the air volume for equipment between the engine rooms, the first frequency converter raises the frequency of the first variable frequency fan, and the air supply volume of the first variable frequency fan is increased;
s2, when the first variable frequency fan reaches the maximum frequency and the air supply quantity cannot meet the air quantity requirement between the engine cabins, the second variable frequency fan is started, and the first variable frequency fan and the second variable frequency fan operate at the same frequency to meet the air quantity requirement between the engine cabins;
s3, when the first variable frequency fan and the second variable frequency fan reach the maximum frequency and the air supply quantity cannot meet the air quantity requirement between the engine rooms, the second non-variable frequency fan is opened, the first variable frequency fan runs at the lowest frequency, the second variable frequency fan runs at the highest frequency, and the first frequency converter increases the frequency of the first variable frequency fan along with the increase of the air quantity for equipment between the engine rooms;
and S4, when the first variable frequency fan reaches the maximum frequency and the air supply volume cannot meet the air volume requirement between the engine cabins, the first non-variable frequency fan and the second non-variable frequency fan operate simultaneously, and the first variable frequency fan and the second variable frequency fan operate at the same frequency to meet the air volume requirement between the engine cabins.
4. The variable frequency control method for the marine wind turbine according to claim 1, wherein the maximum frequency of the first variable frequency wind turbine is equal to the maximum frequency of the second variable frequency wind turbine and the frequency of the first non-variable frequency wind turbine is equal to the frequency of the second non-variable frequency wind turbine.
5. The method for controlling variable frequency of the marine fan according to claim 1, wherein the air outlets of the first variable frequency fan and the first non-variable frequency fan are respectively connected to a first air supply pipeline through an air brake, and the air outlets of the second variable frequency fan and the second non-variable frequency fan are respectively connected to a second air supply pipeline through an air brake.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011418142.1A CN112576535B (en) | 2020-12-07 | 2020-12-07 | Variable frequency control method for marine fan |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011418142.1A CN112576535B (en) | 2020-12-07 | 2020-12-07 | Variable frequency control method for marine fan |
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| CN112576535A true CN112576535A (en) | 2021-03-30 |
| CN112576535B CN112576535B (en) | 2022-08-05 |
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Citations (7)
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| JP2001227493A (en) * | 2000-02-17 | 2001-08-24 | Hitachi Kokusai Electric Inc | Fan control circuit |
| CN201018451Y (en) * | 2007-03-13 | 2008-02-06 | 广东明阳龙源电力电子有限公司 | Variable frequency speed regulation system |
| CN204061254U (en) * | 2014-06-09 | 2014-12-31 | 国家电网公司 | Based on the transformer blower fan of PLC VFC |
| CN106368971A (en) * | 2016-08-18 | 2017-02-01 | 常州博瑞电力自动化设备有限公司 | Automatic control method of cooling capacity of outer cooling unit |
| JP2017227207A (en) * | 2016-06-21 | 2017-12-28 | シャープ株式会社 | Device including blade cascade part and system including the device |
| CN207908999U (en) * | 2018-02-14 | 2018-09-25 | 南阳华诚智能有限公司 | A kind of temperature control system of cultured space |
| CN208073838U (en) * | 2017-12-06 | 2018-11-09 | 启源（西安）大荣环保科技有限公司 | A kind of corrugation forming machine exhaust system |
-
2020
- 2020-12-07 CN CN202011418142.1A patent/CN112576535B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001227493A (en) * | 2000-02-17 | 2001-08-24 | Hitachi Kokusai Electric Inc | Fan control circuit |
| CN201018451Y (en) * | 2007-03-13 | 2008-02-06 | 广东明阳龙源电力电子有限公司 | Variable frequency speed regulation system |
| CN204061254U (en) * | 2014-06-09 | 2014-12-31 | 国家电网公司 | Based on the transformer blower fan of PLC VFC |
| JP2017227207A (en) * | 2016-06-21 | 2017-12-28 | シャープ株式会社 | Device including blade cascade part and system including the device |
| CN106368971A (en) * | 2016-08-18 | 2017-02-01 | 常州博瑞电力自动化设备有限公司 | Automatic control method of cooling capacity of outer cooling unit |
| CN208073838U (en) * | 2017-12-06 | 2018-11-09 | 启源（西安）大荣环保科技有限公司 | A kind of corrugation forming machine exhaust system |
| CN207908999U (en) * | 2018-02-14 | 2018-09-25 | 南阳华诚智能有限公司 | A kind of temperature control system of cultured space |
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