CN203928273U - A kind of central air-conditioning frequency-changing control system - Google Patents
A kind of central air-conditioning frequency-changing control system Download PDFInfo
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- CN203928273U CN203928273U CN201320769983.6U CN201320769983U CN203928273U CN 203928273 U CN203928273 U CN 203928273U CN 201320769983 U CN201320769983 U CN 201320769983U CN 203928273 U CN203928273 U CN 203928273U
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- frequency
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- conditioning
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- 238000004378 air conditioning Methods 0.000 title claims abstract description 16
- 238000006243 chemical reaction Methods 0.000 claims abstract description 10
- 230000000694 effects Effects 0.000 abstract description 3
- 238000001816 cooling Methods 0.000 description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 238000010586 diagram Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- Air Conditioning Control Device (AREA)
Abstract
The utility model relates to a kind of central air-conditioning frequency-changing control system, be applicable to the central air-conditioning of the blower fan with at least 2 equal-wattage motors, it comprises frequency-changing control system of fan and temperature sensor, and frequency-changing control system of fan is made up of frequency conversion loop, power frequency loop and change-over switch.Frequency conversion loop is by frequency converter, air switch, at least 2 A.C. contactors and automatically operation control loop and signal alarm loop composition; Power frequency loop comprises air switch, at least 2 A.C. contactors and corresponding electrothermal relays and manually move control loop.The utility model can make central air-conditioning in more desirable duty, and has very significant energy-saving effect (conventionally can up to 30%), thereby brings good economic benefit.
Description
Technical field
The utility model belongs to field of energy-saving technology, particularly relates to a kind of central air-conditioning frequency-changing control system.
Background technology
Central air conditioner system is widely used in industry and civil area, the capacity of its refrigeration compressor set, freeze cycle water system, cooling circulating water system, cooling tower fan system etc. mostly freezes, heats to load and select according to building is maximum, and leaves sufficient surplus again.Possess in the control system of load regulation characteristic not having to use, no matter season, round the clock with the how variation of customer charge, each motor is all fixed on full speed running under power frequency state for a long time, has caused the huge waste of energy.Due to the rising steadily of electricity price, make central air conditioner system operating cost sharply increase, and occupy increasing ratio in enterprise operation cost in recent years, industry competition fierceness at present in addition, most enterprise profits space is not ideal enough.Therefore the control of electric energy expense has obviously become the problem place that administrator pays close attention to.
Summary of the invention
The utility model, for solving above-mentioned prior art Shortcomings, has proposed a kind of central air-conditioning frequency-changing control system, and it is applicable to not use the central air conditioner system that possesses load regulation characteristic, and energy-saving effect is fairly obvious.
The technical scheme that the utility model technical solution problem is taked is, a kind of central air-conditioning frequency-changing control system, be applicable to the central air-conditioning of the blower fan with at least 2 equal-wattage motors, it comprises frequency-changing control system of fan and temperature sensor, and described frequency-changing control system of fan is made up of frequency conversion loop, power frequency loop and change-over switch.
Preferably, described frequency conversion loop is by frequency converter, air switch, at least 2 A.C. contactors and automatically operation control loop and signal alarm loop composition; Described power frequency loop comprises air switch, at least 2 A.C. contactors and corresponding electrothermal relays and manually move control loop.
In the utility model, described temperature sensor is arranged on cooling tower water inlet and outlet conduit.In described frequency conversion loop, adopt 1 frequency converter, 1 air switch and with the same number of A.C. contactor of blower fan; In described power frequency loop adopt with the same number of air switch of blower fan and with the same number of A.C. contactor of blower fan and with the same number of electrothermal relay of blower fan.
Control mode when the utility model actual motion is: normal condition, change-over switch is switched to automatic operating loop, by temperature sensor measurement cooling tower leaving water temperature and convert current signal or the voltage signal of standard to, deliver to the input that simulates of frequency converter and bring in the rotating speed of controlling frequency converter, change the air quantity of blower fan, thereby change the leaving water temperature of cooling tower; In the time that a Fans operation still can not meet the demands, change the blower fan of this converting operation into power frequency operation, then another Fans of variable frequency starting, reach technological requirement (being water temperature≤32 DEG C) until meet the temperature of the required recirculated water of process units.Whole control system is a closed-loop regulating system.According to the technological requirement of device, automatically determine that blower fan is converting operation or power frequency operation.And accomplish that the blower fan moving at first excises at first, the operation of each motor cycle, thereby the object in extension device service life.When frequency conversion loop or frequency converter are out of order time, change-over switch will be switched to manual mode, and all motors all operate in power frequency state still can meet device technique requirement.
The beneficial effects of the utility model are, can make central air-conditioning in more desirable duty, and have very significant energy-saving effect (conventionally can up to 30%), thereby bring good economic benefit.
Brief description of the drawings
Fig. 1 is the schematic diagram that a kind of detailed description of the invention of the utility model is applied to central air-conditioning.
Fig. 2 is a kind of detailed description of the invention Circuits System of the utility model shown in Fig. 1 schematic diagram.
Fig. 3 is a kind of detailed description of the invention electrical schematic diagram of the utility model shown in Fig. 1.
Detailed description of the invention
Be illustrated in figure 1 a kind of central air-conditioning frequency-changing control system, be applicable to the central air-conditioning of the blower fan 3 with 4 equal-wattage motors, comprise frequency-changing control system of fan 1 and temperature sensor 2, temperature sensor 2 is arranged on cooling tower inlet channel 4 and outlet conduit 5.Frequency-changing control system of fan 1 is made up of frequency conversion loop, power frequency loop and change-over switch, and Fig. 2 is Circuits System schematic diagram.Frequency conversion loop is by frequency converter, air switch Q1, and 4 A.C. contactor KM1, KM3, KM5 and KM7, move control loop and signal alarm loop composition automatically; Power frequency loop comprises air switch Q2, Q2, Q3 and Q4,4 A.C. contactor M2, KM4, KM6 and KM8,4 electrothermal relay FR1, FR2, FR3 and FR4 and manually move control loop.The power of motor of 4 Fans, adopts the mode of a frequency converter loop control to move, and system electrical principle as shown in Figure 3.
Above embodiment only formulates for the cooling tower fan system in central air conditioner system, is engaged in that those skilled in the art is to be understood that and can modifies and be equal to replacement the technical solution of the utility model.But any do not depart from the amendment of spirit and scope of the present utility model and be equal to replacement all belong to the utility model protection domain.
Claims (2)
1. a central air-conditioning frequency-changing control system, be applicable to the central air-conditioning of the blower fan with at least 2 equal-wattage motors, it is characterized in that, comprise frequency-changing control system of fan and temperature sensor, described frequency-changing control system of fan is made up of frequency conversion loop, power frequency loop and change-over switch.
2. central air-conditioning frequency-changing control system according to claim 1, is characterized in that, described frequency conversion loop is by frequency converter, air switch, at least 2 A.C. contactors and automatically operation control loop and signal alarm loop composition; Described power frequency loop comprises air switch, at least 2 A.C. contactors and corresponding electrothermal relays and manually move control loop.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320769983.6U CN203928273U (en) | 2013-11-30 | 2013-11-30 | A kind of central air-conditioning frequency-changing control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320769983.6U CN203928273U (en) | 2013-11-30 | 2013-11-30 | A kind of central air-conditioning frequency-changing control system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203928273U true CN203928273U (en) | 2014-11-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320769983.6U Expired - Fee Related CN203928273U (en) | 2013-11-30 | 2013-11-30 | A kind of central air-conditioning frequency-changing control system |
Country Status (1)
| Country | Link |
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| CN (1) | CN203928273U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104976735A (en) * | 2015-06-19 | 2015-10-14 | 中山顺富节能科技有限公司 | Air conditioner continuously-used electricity-saving appliance |
-
2013
- 2013-11-30 CN CN201320769983.6U patent/CN203928273U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104976735A (en) * | 2015-06-19 | 2015-10-14 | 中山顺富节能科技有限公司 | Air conditioner continuously-used electricity-saving appliance |
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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 |
Granted publication date: 20141105 Termination date: 20181130 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |