CN114526255B - No-load start-stop control method for centrifugal blower - Google Patents
No-load start-stop control method for centrifugal blower Download PDFInfo
- Publication number
- CN114526255B CN114526255B CN202210223025.2A CN202210223025A CN114526255B CN 114526255 B CN114526255 B CN 114526255B CN 202210223025 A CN202210223025 A CN 202210223025A CN 114526255 B CN114526255 B CN 114526255B
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- China
- Prior art keywords
- electric valve
- control method
- time relay
- centrifugal blower
- valve
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Classifications
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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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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D17/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
- F04D17/08—Centrifugal pumps
- F04D17/10—Centrifugal pumps for compressing or evacuating
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
Abstract
The invention provides a no-load start-stop control method for a centrifugal blower, and relates to the technical field of centrifugal blowers. The no-load start-stop control method for the centrifugal blower specifically comprises the following steps: s1, selecting an electric valve, wherein the electric valve is required to be selected before the control method is used, and the electric valve is selected from a ball valve, a butterfly valve or a gate valve; s2, in a state of an electric valve, the electric valve is in a normally closed state, and is powered on and powered off and closed; s3, preparing before starting, starting an electric valve before starting, pressing a starting button frequency converter to drive a fan to run, outputting by a time relay when the outlet pressure reaches a certain value after a period of time, switching off the electric valve, and gradually closing the electric valve; s4, in the starting process, a time relay is arranged at the front section of the electric valve in the starting process. The invention provides a no-load start-stop control method for a centrifugal blower, which has the advantages of simple structure, difficult occurrence of faults and long service life.
Description
Technical Field
The invention relates to the technical field of centrifugal blowers, in particular to a no-load start-stop control method for a centrifugal blower.
Background
The centrifugal blower presses air by using centrifugal force generated by a rotor equipped with a plurality of blades to achieve a certain air volume and air pressure, and the compressor is called a centrifugal compressor because it continuously sucks refrigerant vapor while operating and continuously throws it out in a radial direction, wherein the compressor is classified into a single stage type and a multi-stage type according to the number of rotor installed in the compressor, and if only one rotor is called a single stage centrifugal compressor, if it is composed of several rotors connected in series, it is called a multi-stage centrifugal compressor.
The conventional centrifugal blower uses a pneumatic valve to realize hollow loading and unloading in the starting and stopping processes, one of the pneumatic valves is required to provide an external air source, and the other pneumatic valve is required to use low-pressure air of an outlet after the blower operates, but an electromagnetic valve is required to be additionally arranged, so that the centrifugal blower has a complex structure and is easy to break down.
Disclosure of Invention
(one) solving the technical problems
Aiming at the defects of the prior art, the invention provides a no-load start-stop control method for a centrifugal blower, which solves the problem that the structure is complex and the failure is easy to occur.
(II) technical scheme
In order to achieve the above purpose, the invention is realized by the following technical scheme: a no-load start-stop control method for a centrifugal blower specifically comprises the following steps:
s1, selecting an electric valve
Before the control method is used, a proper electric valve is needed to be selected, and the electric valve is a ball valve, a butterfly valve or a gate valve;
s2, electric valve state
The electric valve is normally closed, and is powered on and powered off;
s3, preparation before starting
Before starting, the electric valve is opened, the starting button frequency converter is pressed to drive the fan to operate, when the outlet pressure reaches a certain value after a period of time, the time relay outputs, the electric valve is powered off, and the electric valve is gradually closed;
s4, in the starting process
The starting process is to configure a time relay at the front section of the electric valve, the stopping process is to configure a time relay at the front end of the frequency converter, and the time relay receives an input signal for a period of time and outputs the signal;
s5, after stopping
When the stop button is pressed, the electric valve is electrified to be opened gradually, and after the electric valve is completely opened, the time relay outputs a signal, the frequency converter is powered off, and the fan stops running.
Preferably, the specific structure of the starting state in the step S4 is that a starting key is respectively connected with a frequency converter and a time relay, the time relay is connected with an electric valve, and the frequency converter is connected with a fan.
Preferably, the specific structure of the closing state in the step S5 is that the stop button is respectively connected with the electric valve and the time relay, the time relay is connected with the frequency converter, and the frequency converter is connected with the fan.
Preferably, the opening and closing of the electric valve requires a certain time.
Preferably, the time of the time relay in S4 can be modified.
Preferably, the outlet pressure value in S3 can be adjusted.
(III) beneficial effects
The invention provides a no-load start-stop control method for a centrifugal blower. The beneficial effects are as follows:
the invention provides a no-load start-stop control method for a centrifugal blower, which is characterized in that the pressure in an air outlet pipeline is released through an air outlet by realizing the air discharging treatment in the stop process of the centrifugal blower, so that the compressed air in the pipeline is prevented from flowing backwards to the blower to impact equipment parts after the blower stops running immediately, thereby avoiding the occurrence of faults and prolonging the service life.
The invention provides a no-load start-stop control method for a centrifugal blower, which uses an electric valve to realize emptying, does not need to be matched with an external air source, can supply power, starts to configure a time relay at the front end of the electric valve, and stops to configure the time relay at the front end of a frequency converter so as to avoid the problem that the electric valve needs a certain time to be opened and closed.
Drawings
FIG. 1 is a schematic diagram of a start-up state flow of the present invention;
fig. 2 is a schematic diagram of a stop state flow chart of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Examples:
as shown in fig. 1-2, an embodiment of the present invention provides a no-load start-stop control method for a centrifugal blower, which specifically includes the following steps:
s1, selecting an electric valve
Before the control method is used, a proper electric valve is needed to be selected, and the electric valve is a ball valve, a butterfly valve or a gate valve;
s2, electric valve state
The electric valve is normally closed, and is powered on and powered off;
s3, preparation before starting
Before starting, the electric valve is opened, the starting button frequency converter is pressed to drive the fan to operate, when the outlet pressure reaches a certain value after a period of time, the time relay outputs, the electric valve is powered off, and the electric valve is gradually closed;
s4, in the starting process
The starting process is to configure a time relay at the front section of the electric valve, the time relay is used for positioning time, the stopping process is to configure the time relay at the front end of the frequency converter, and the time relay receives an input signal for a period of time and then outputs the input signal;
s5, after stopping
When the stop button is pressed, the electric valve is electrified to be opened gradually, and after the electric valve is completely opened, the time relay outputs a signal, the frequency converter is powered off, and the fan stops running.
The starting state concrete structure in S4 is that the starting button is connected converter and time relay respectively, and the time relay is connected the motorised valve, and the fan is connected to the converter, and the off state concrete structure in S5 is that the stopping button is connected motorised valve and time relay respectively, and the time relay is connected the converter, and the fan is connected to the converter, and the opening of motorised valve and the time of closing need certain time, and the time of time relay can be modified in S4, and the outlet pressure value can be adjusted in S3, and the practicality is higher like this.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. The no-load start-stop control method for the centrifugal blower is characterized by comprising the following steps of:
s1, selecting an electric valve
Before the control method is used, a proper electric valve is needed to be selected, and the electric valve is a ball valve, a butterfly valve or a gate valve;
s2, electric valve state
The electric valve is normally closed, and is powered on and powered off;
s3, preparation before starting
Before starting, the electric valve is opened, the starting button frequency converter is pressed to drive the fan to operate, when the outlet pressure reaches a certain value after a period of time, the time relay outputs, the electric valve is powered off, and the electric valve is gradually closed;
s4, in the starting process
The starting process is to configure a time relay at the front section of the electric valve, the stopping process is to configure a time relay at the front end of the frequency converter, and the time relay receives an input signal for a period of time and outputs the signal;
s5, after stopping
When the stop button is pressed, the electric valve is electrified to be opened gradually, and after the electric valve is completely opened, the time relay outputs a signal, the frequency converter is powered off, and the fan stops running.
2. The idle start-stop control method for a centrifugal blower according to claim 1, wherein: the starting state in the step S4 is specifically structured that a starting button is respectively connected with a frequency converter and a time relay, the time relay is connected with an electric valve, and the frequency converter is connected with a fan.
3. The idle start-stop control method for a centrifugal blower according to claim 1, wherein: and S5, the specific structure of the closing state is that the stop button is respectively connected with the electric valve and the time relay, the time relay is connected with the frequency converter, and the frequency converter is connected with the fan.
4. The idle start-stop control method for a centrifugal blower according to claim 1, wherein: the opening and closing of the electric valve requires a certain time.
5. The idle start-stop control method for a centrifugal blower according to claim 1, wherein: the time of the time relay in S4 can be modified.
6. The idle start-stop control method for a centrifugal blower according to claim 1, wherein: the outlet pressure value in S3 can be adjusted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210223025.2A CN114526255B (en) | 2022-03-09 | 2022-03-09 | No-load start-stop control method for centrifugal blower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210223025.2A CN114526255B (en) | 2022-03-09 | 2022-03-09 | No-load start-stop control method for centrifugal blower |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114526255A CN114526255A (en) | 2022-05-24 |
| CN114526255B true CN114526255B (en) | 2023-09-12 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210223025.2A Active CN114526255B (en) | 2022-03-09 | 2022-03-09 | No-load start-stop control method for centrifugal blower |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2082631A5 (en) * | 1970-03-20 | 1971-12-10 | Gen Pneumatic | |
| JPH0988863A (en) * | 1995-09-20 | 1997-03-31 | Hokuetsu Kogyo Co Ltd | Starting load reducing device of compressor |
| CN212360260U (en) * | 2020-06-12 | 2021-01-15 | 重庆顺昌通用电器有限责任公司 | High-speed frequency conversion directly drives single-stage centrifugal blower control system |
| CN113775554A (en) * | 2021-11-09 | 2021-12-10 | 亿昇(天津)科技有限公司 | Emptying valve assembly, air blower system and control method of air blower system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101429846B1 (en) * | 2013-02-06 | 2014-08-12 | 한승주 | Air Charger driven by Rotating Magnetic Field |
-
2022
- 2022-03-09 CN CN202210223025.2A patent/CN114526255B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2082631A5 (en) * | 1970-03-20 | 1971-12-10 | Gen Pneumatic | |
| JPH0988863A (en) * | 1995-09-20 | 1997-03-31 | Hokuetsu Kogyo Co Ltd | Starting load reducing device of compressor |
| CN212360260U (en) * | 2020-06-12 | 2021-01-15 | 重庆顺昌通用电器有限责任公司 | High-speed frequency conversion directly drives single-stage centrifugal blower control system |
| CN113775554A (en) * | 2021-11-09 | 2021-12-10 | 亿昇(天津)科技有限公司 | Emptying valve assembly, air blower system and control method of air blower system |
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| Publication number | Publication date |
|---|---|
| CN114526255A (en) | 2022-05-24 |
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