CN204790497U - It is equipped with pump variable frequency electrical system to use one - Google Patents
It is equipped with pump variable frequency electrical system to use one Download PDFInfo
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- CN204790497U CN204790497U CN201520524338.7U CN201520524338U CN204790497U CN 204790497 U CN204790497 U CN 204790497U CN 201520524338 U CN201520524338 U CN 201520524338U CN 204790497 U CN204790497 U CN 204790497U
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Abstract
The utility model relates to an it is equipped with pump variable frequency electrical system to use one, including PLC programmable controller, converter, 0 -24V pressure sensor, temperature sensor, on -the -spot alternating current power supply process circuit breaker in proper order, phase sequence relay, fuse -link connection PLC programmable controller power, PLC programmable controller collection linkage signal, water flow switch signal and low temperature guard signal, 0 -24V pressure sensor, temperature sensor, PLC programmable controller connect the converter, and on -the -spot alternating current power supply connects the converter through the circuit breaker, and two water pumps are connected to the converter. The use is used one and is equipped with the trouble automatic switch -over and moves the function in turn, and real -time pressure differential or difference in temperature signal are gathered in the operation of application PID, control converter regulation output frequence, and the control pump rotational speed reaches automatic control water pump operation's purpose. Control is very powerful, with strong points, except being applicable to the special -purpose model, need also to can be used to the project and the equipment of this control combination function.
Description
Technical field
The utility model relates to a kind of air conditioner controlling technology, particularly a kind of the using and the reserved pump variable frequency electric-control system.
Background technology
In existing air-conditioning system, the parallel connection of two water pumps uses, failover and frequency conversion control functions can not combine cover and join, and market lacks the standby electricity Ore-controlling Role in parallel of water pump selection modular product, as energy-saving type air conditioner machine room, module type air conditioner room equipment and hydraulic module do not have the Special electric Ore-controlling Role of for subsequent use and frequency conversion of special parallel connection.The combination application technique of water pump cannot be popularized, and the control of water pump uses the nonstandard manufacture of whole non-standard de-sign, and project cost is improved, claim for eot, Energy Saving Control cannot unified standard.
It is more that one of existing close product becomes two fixed configuration mode advantages, also more flexible in operation, but be no matter excision or drop into variable frequency pump time, all must ensure that the flow of at this moment variable frequency pump equals zero, its lift equals system differential pressure just simultaneously.If it is improper that the switching time of variable frequency pump is selected, then in variable frequency pump excision with when dropping into, or cause flow rate fluctuation, or cause control hysteresis.This just needs to determine under what supply frequency, and variable frequency pump meets this two conditions just.Shortcoming needs to consider the switching problem between variable frequency pump and constant speed pump, steering logic more complicated.
Generally, water pump parallel connection uses, the combination of failover and frequency conversion control function, be one very conventional, and possessing the control mode of energy-saving benefit, if can not make it combine and possess universal standardization, is an obstruction to the development of industry.
Utility model content
The utility model uses for two the water pump parallel connections of present energy-saving frequency conversion air conditioner to control Problems existing, propose a kind of the using and the reserved pump variable frequency electric-control system, the fault automatic switchover of use the using and the reserved and in turn operation function, use PID arithmetic, gather real-time pressure reduction or temperature signal, control frequency converter regulation output frequency, control pump rotary speed, reach the object that automatically controlled water pump runs.Control very powerful, with strong points, except being applicable to special-purpose model, also can be used for the project and the equipment that need this control combination function.
The technical solution of the utility model is: a kind of the using and the reserved pump variable frequency electric-control system, comprise PLC, frequency converter, isolating switch, A.C. contactor, phase sequence relay, fuse-link, 0-24V pressure transducer, temperature sensor, on-the-spot AC power is successively through isolating switch, phase sequence relay, fuse-link connects PLC power supply, PLC collection interlock signal, water flow switch signal and low-temperature protection signal, described 0-24V pressure transducer, temperature sensor, PLC connects frequency converter, on-the-spot AC power connects frequency converter through isolating switch, frequency converter connects two water pumps.
Described PLC connects man-machine interface.
The beneficial effects of the utility model are: the utility model the using and the reserved pump variable frequency electric-control system, makes the combination application technique of water pump large area to popularize, and it is standardization manufacture that the control of water pump uses, and project cost is reduced, and the duration shortens.Water pump parallel connection uses, the combination of failover and frequency conversion control function, and the control mode possess energy-saving benefit, extending water pump serviceable life, combines and stroke standard product, have great facilitation to the development of industry.
Accompanying drawing explanation
Fig. 1 is the utility model the using and the reserved pump variable frequency electric-control system electrical schematic diagram.
Fig. 2 is the utility model system control logic block diagram.
Embodiment
The using and the reserved pump variable frequency electric-control system electrical principle as shown in Figure 1, comprises the control elements such as PLC, frequency converter, isolating switch, thermal overload relay, A.C. contactor, phase sequence relay, relay, fuse-link, 0-24V pressure transducer, temperature sensor, 24V direct supply and connection terminal.
By field power supply access controller, electric current, through power safety protected locations such as isolating switch, phase sequence relay, fuse-links, enters internal system, after making action command, controls pump motor, starting mode of pump by PLC, frequency converter.
Control section is then that collection pressure reduction or temperature signal enter into frequency converter inside, judges through frequency converter, makes frequency adjustment instruction, by power supply process to formulation frequency, flows to water pump, pump rotary speed is changed.
Outer link signal, water flow switch signal and low-temperature protection signal enter into PLC in addition, and the steering logic through inserting PLC in advance judges, automatically takes turns to operate to two water pumps, and the instruction that automatic fault switches exports, and coordinates water pump selection work.
System control logic block diagram as shown in Figure 2; be provided with motor (water pump) cooperative operation logic (as the using and the reserved); add the variable frequency control of motor (water pump); on this; also the Based Intelligent Control such as main frame interlock, excessive low water level protection, low-temperature protection, Stress control and temperature control are possessed; and telecommunication controls, and above-mentioned functions is integrated perfection and realizes many motors (water pump) collaborative work.
Concrete control is as follows:
1, after switch board is opened, First pump variable frequency runs, and when can not meet actual needs, this water pump automatically switches to power frequency operation, and second water pump drops into converting operation automatically, and when still not meeting, second water pump also automatically switches to power frequency operation.When actual used water amount reduces, First pump is because bring into operation at first, and this water pump is automatically out of service; When water consumption continues to reduce, second water pump is automatically out of service; When only having the large pump operation of separate unit, and when water consumption is little, automatically switch to stabilized pressure pump converting operation.When stabilized pressure pump can not meet water supply need time, then stabilized pressure pump is automatically out of service, and large pump puts into operation automatically.Pressure of supply water is stablized, and system realizes closed-loop control, the difference of energy varitrol pressure and set pressure, makes system pressure keep constant.
2, timing automatic switches: when (this time can free setting) after water pump operation certain hour, then automatically switch to next pump working, avoid long-time running loss, also avoid not working rust for a long time extremely, two pumps alternate run capable of circulation, the average operation time of balanced each pump extends the serviceable life of water pump, thus avoids the long-term of stand-by pump not run and corrosion, and when ensureing that fire alarm occurs, water pump can put into operation smoothly.
3, fault automatically switches: when a certain pump breaks down, then next pump puts into operation automatically, can not supply water by influential system.
4, Working mode set: select and manually, automatically control, manually can ensure that the safe and continuous of equipment is run, under auto state, pump motor realizes soft start, to electrical network and pipe network without impact, greatly extend the serviceable life of water pump, motor, piping system, electric control system;
5, protect: all can accurately report to the police when the faults such as phase shortage, short circuit, ground connection, under-voltage, overcurrent, overvoltage, overheated, overload appear in pump motor, water pump operation, if any fault, quits work and output of reporting to the police automatically, automatic switchover water pump;
6, fault-tolerant: switch board has automatic frequency-conversion, manual frequency conversion and manual power frequency function, can assure feed water to the full extent, even if frequency converter and programmable controller all damage, still can allow water pump power frequency operation, assure feed water.
7, adopt PLC programmable controller, carry out man-machine interface to pump group and miscellaneous equipment, be aided with computer technology and carry out Based Intelligent Control, PLC is with communication module, can realize Long-distance Control.
In order to control to meet on-the-spot situation, water pump is also configurable one standby with two, or dual-purpose one is standby, then by rational power frequency frequency conversion state switching, reaches stable hydraulic pressure and energy-conservation.
Claims (2)
1. a using and the reserved pump variable frequency electric-control system, comprise PLC, frequency converter, isolating switch, A.C. contactor, phase sequence relay, fuse-link, 0-24V pressure transducer, temperature sensor, it is characterized in that: on-the-spot AC power is successively through isolating switch, phase sequence relay, fuse-link connects PLC power supply, PLC collection interlock signal, water flow switch signal and low-temperature protection signal, described 0-24V pressure transducer, temperature sensor, PLC connects frequency converter, on-the-spot AC power connects frequency converter through isolating switch, frequency converter connects two water pumps.
2. the using and the reserved pump variable frequency electric-control system according to claim 1, is characterized in that, described PLC connects man-machine interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520524338.7U CN204790497U (en) | 2015-07-20 | 2015-07-20 | It is equipped with pump variable frequency electrical system to use one |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520524338.7U CN204790497U (en) | 2015-07-20 | 2015-07-20 | It is equipped with pump variable frequency electrical system to use one |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204790497U true CN204790497U (en) | 2015-11-18 |
Family
ID=54530509
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520524338.7U Expired - Fee Related CN204790497U (en) | 2015-07-20 | 2015-07-20 | It is equipped with pump variable frequency electrical system to use one |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204790497U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105571062A (en) * | 2015-12-31 | 2016-05-11 | 深圳市共济科技有限公司 | Automatic cooling water control system and method for air conditioner in machine room |
| CN106050631A (en) * | 2016-07-23 | 2016-10-26 | 郴州市东塘电气设备有限公司 | Start-reliable fire pump controller |
-
2015
- 2015-07-20 CN CN201520524338.7U patent/CN204790497U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105571062A (en) * | 2015-12-31 | 2016-05-11 | 深圳市共济科技有限公司 | Automatic cooling water control system and method for air conditioner in machine room |
| CN106050631A (en) * | 2016-07-23 | 2016-10-26 | 郴州市东塘电气设备有限公司 | Start-reliable fire pump controller |
| CN106050631B (en) * | 2016-07-23 | 2019-11-19 | 郴州市东塘电气设备有限公司 | The fire pump controller reliably started |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151118 Termination date: 20200720 |