CN204572528U - A kind of centrifugal blower No Load Start current protection automatic controller - Google Patents
A kind of centrifugal blower No Load Start current protection automatic controller Download PDFInfo
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- CN204572528U CN204572528U CN201520180697.5U CN201520180697U CN204572528U CN 204572528 U CN204572528 U CN 204572528U CN 201520180697 U CN201520180697 U CN 201520180697U CN 204572528 U CN204572528 U CN 204572528U
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- centrifugal blower
- air valve
- electric air
- current protection
- controller
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- Control Of Positive-Displacement Air Blowers (AREA)
Abstract
The utility model provides a kind of centrifugal blower No Load Start current protection automatic controller; it is characterized in that: comprise the Electric air valve be located in air channel; the exhaust outlet of the centrifugal blower of Electric air valve on air channel; Electric air valve connection control device, controller is connected with the blower fan start stop switch output contact of centrifugal blower.The utility model has the advantages that: reduce no load current during fan starting, thus decrease No Load Start because the excessive impact caused electrical network of inrush current.Avoid the instantaneous overload operation of motor, even burn-down of electric motor.Realize the full-automatic operation of fan outlet valve, without the need to artificially closing and opening valve, reduce the probability that people is misoperation.
Description
Technical field
The utility model relates to a kind of centrifugal blower No Load Start current protection automatic controller, can be used for electronics, machinery, weaving, tobacco, chemistry, medical treatment, and all types of industries factory buildings such as food, in warehouse and civilian Gongjian, belong to current protection and automatic control technology field.
Background technique
Due to when centrifugal blower starts if do not closed outlet air-valve, pipeline is usually blank pipe, not pipe damping power, when blower fan can be caused like this to start under certain rotating speed in the short time owing to there is no resistance, can flow bigger than normal running, usually there is fan vibration, noise, cause inrush current excessive, thus causing instantaneously to the impact of electrical network, even motor overload running, by burn-down of electric motor.
In reality engineering, the blower fan that power is larger employs star triangle start etc. and exchanges the Starting mode of reduction inrush current for sacrifice power for cost.Current low power blower fan does not then use this type of Starting mode.Therefore, little for the total network load of project, and the situation having more small-power centrifugal blower simultaneously to run, current protection and automatic control technology just are very necessary to use.
Summary of the invention
The purpose of this utility model is to provide one, and can to apply to electrical network total load little, power consumption had to current protection and the automatic controller of the occasion of requirement.
In order to achieve the above object; the technical solution of the utility model there is provided a kind of centrifugal blower No Load Start current protection automatic controller; it is characterized in that: comprise the Electric air valve be located in air channel; the exhaust outlet of the centrifugal blower of Electric air valve on air channel; Electric air valve connection control device, controller is connected with the blower fan start stop switch output contact of centrifugal blower.
Preferably, described controller comprises delayer relay and actuator is formed, the input end of time delay relay is connected with the output contact of described blower fan start stop switch, and the output terminal of time delay relay is connected with one end of actuator, and the other end of actuator is connected with described Electric air valve.
Before fan starting, Electric air valve is closed condition; Time delay relay sends actuating signal to actuator after the time of setting, and actuator starts working after obtaining actuating signal, and Electric air valve is slowly opened.The time of setting can be determined according to site test, for inrush current is by the time of high (i.e. rated current 4 ~ 7 times) ease up (i.e. rated current); After blower fan is out of service, actuator obtains time delayed signal and reverse work, and Electric air valve is closed.
The utility model has the advantages that:
(1) reduce no load current during fan starting, thus decrease No Load Start because the excessive impact caused electrical network of inrush current.Avoid the instantaneous overload operation of motor, even burn-down of electric motor.
(2) realize the full-automatic operation of fan outlet valve, without the need to artificially closing and opening valve, reduce the probability that people is misoperation.
Accompanying drawing explanation
The centrifugal blower No Load Start current protection automatic controller principle schematic that Fig. 1 provides for the utility model.
Embodiment
For making the utility model become apparent, hereby with preferred embodiment, and accompanying drawing is coordinated to be described in detail below.
See Fig. 1; for the centrifugal blower No Load Start current protection automatic controller principle schematic that the utility model provides; described centrifugal blower No Load Start current protection automatic controller comprises the Electric air valve 6 be located in air channel 7; the exhaust outlet of the centrifugal blower 1 of Electric air valve 6 on air channel 7; Electric air valve 6 connection control device 5, controller 5 is connected with blower fan start stop switch 2 output contact of centrifugal blower 1.
Described controller 5 comprises delayer relay 3 and actuator 4 is formed, the input end of time delay relay 3 is connected with the output contact of described blower fan start stop switch 2, the output terminal of time delay relay 3 is connected with one end of actuator 4, and the other end of actuator 4 is connected with described Electric air valve 6.
Before centrifugal blower 1 starts, Electric air valve 6 is closed condition; After centrifugal blower 1 starts, time delay relay 3 is started working, and after set time, time delay relay 3 sends actuating signal to actuator 4, and actuator 4 starts working after obtaining actuating signal, controls Electric air valve 6 and slowly opens.The time of setting can be determined according to site test, for inrush current is by the time of high (i.e. rated current 4 ~ 7 times) ease up (i.e. rated current); After centrifugal blower 1 is out of service, actuator 4 obtains time delay relay signal and reverse work, controls Electric air valve 6 and closes.
Claims (2)
1. a centrifugal blower No Load Start current protection automatic controller; it is characterized in that: comprise the Electric air valve (6) be located in air channel (7); the exhaust outlet of the centrifugal blower (1) of Electric air valve (6) on air channel (7); Electric air valve (6) connection control device (5), controller (5) is connected with blower fan start stop switch (2) output contact of centrifugal blower (1).
2. a kind of centrifugal blower No Load Start current protection automatic controller as claimed in claim 1; it is characterized in that: described controller (5) comprises delayer relay (3) and actuator (4) is formed; the input end of time delay relay (3) is connected with the output contact of described blower fan start stop switch (2); the output terminal of time delay relay (3) is connected with one end of actuator (4), and the other end of actuator (4) is connected with described Electric air valve (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520180697.5U CN204572528U (en) | 2015-03-27 | 2015-03-27 | A kind of centrifugal blower No Load Start current protection automatic controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520180697.5U CN204572528U (en) | 2015-03-27 | 2015-03-27 | A kind of centrifugal blower No Load Start current protection automatic controller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204572528U true CN204572528U (en) | 2015-08-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520180697.5U Active CN204572528U (en) | 2015-03-27 | 2015-03-27 | A kind of centrifugal blower No Load Start current protection automatic controller |
Country Status (1)
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| CN (1) | CN204572528U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111895145A (en) * | 2020-07-15 | 2020-11-06 | 天津大学 | Liquid sealing method and device for on-off of gas pipeline |
| CN112855575A (en) * | 2021-01-15 | 2021-05-28 | 华电电力科学研究院有限公司 | Centrifugal induced draft equipment for power plant boiler |
| CN114017511A (en) * | 2021-10-13 | 2022-02-08 | 北京市水利规划设计研究院 | Air valve and fan interlocking control system |
-
2015
- 2015-03-27 CN CN201520180697.5U patent/CN204572528U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111895145A (en) * | 2020-07-15 | 2020-11-06 | 天津大学 | Liquid sealing method and device for on-off of gas pipeline |
| CN112855575A (en) * | 2021-01-15 | 2021-05-28 | 华电电力科学研究院有限公司 | Centrifugal induced draft equipment for power plant boiler |
| CN114017511A (en) * | 2021-10-13 | 2022-02-08 | 北京市水利规划设计研究院 | Air valve and fan interlocking control system |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |