CN206377813U - A kind of controlling system of central air conditioner - Google Patents
A kind of controlling system of central air conditioner Download PDFInfo
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- CN206377813U CN206377813U CN201621439379.7U CN201621439379U CN206377813U CN 206377813 U CN206377813 U CN 206377813U CN 201621439379 U CN201621439379 U CN 201621439379U CN 206377813 U CN206377813 U CN 206377813U
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- host computer
- control unit
- refrigeration host
- efficiency
- water pump
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Abstract
The utility model discloses a kind of controlling system of central air conditioner, including refrigeration host computer energy efficiency monitor and PLC control system.Wherein described refrigeration host computer energy efficiency monitor includes refrigeration host computer efficiency control unit, and the refrigeration host computer efficiency control unit includes refrigeration host computer chilled water leaving water temperature optimization module, the alarm of refrigeration host computer efficiency and handover module, refrigeration host computer efficiency optimization module and underload cold-storage and shuts down control module.The energy-saving control system can set the chilled water leaving water temperature, automatic discrimination low-energy-efficiency and low load condition of refrigeration host computer automatically, automatic to improve low-energy-efficiency situation and enter underload cold-storage pattern.With reference to PLC control system can intuitively accurate measurements, metering cooling water pump, chilled water pump, the efficiency of each equipment such as cooling tower and the overall efficiency situation of refrigeration system, make optimization to provide real-time energy efficiency and guide, so as to reach the effect of energy saving of system.
Description
Technical field
The utility model is related to central air-conditioning control field, and in particular to a kind of controlling system of central air conditioner.
Background technology
The power consumption of usual central air conditioner system handpiece Water Chilling Units accounts for more than the 50% of whole central air conditioner system.For fortune throughout the year
Capable central air conditioner system, (1 standard ton is cold unit made in U.S.A, 1 standard ton=3.516kW works refrigeration to a usual Delta to 500 standard tons
Amount), large-scale screw rod or centrifugal refrigerating machines year operation power charge can reach 1,000,000 RMB, and energy consumption spending is huge.Air-conditioning master
The operational energy efficiency normal range (NR) of machine is as follows：
Air-cooled piston machine 0.8-1.5kW/RT
Water-cooled piston machine 0.6-1.0kW/RT
Water-cooling screw rod machine 0.4-0.80kW/RT
Water Cooled Centrifugal Machine 0.4-0.75kW/RT
Variable frequency centrifuge 0.25-0.75kW/RT
The operation power charge situation of 500 standard ton large centrifugal handpiece Water Chilling Units is as shown in table 1.From table 1, handpiece Water Chilling Units compared with
Small efficiency deviation results in the significant wastage of the electricity charge, keeps the high efficiency of refrigeration unit and can significantly save the electricity charge, cooling-water machine
The energy efficiency monitoring of group is that the primary of air conditioner energy saving solves the problems, such as.
Table 1 is different can the contrast of valid value handpiece Water Chilling Units operating cost
| Project | Unit | Good situations | Ordinary circumstance | Poor situation |
| Place capacity | USTR(TON) | 500 | 500 | 500 |
| Annual cold | USTR(TON) | 400 | 400 | 400 |
| Annual efficiency | kW/TON | <0.6 | 0.65 | >0.7 |
| Year hours run | h | 5000 | 5000 | 5000 |
| Year operation power consumption | kWh | 1200000 | 1300000 | 1400000 |
| Electricity Unit Price | Member/kWh | 0.9 | 0.9 | 0.9 |
| Year operation power charge | Member | 1080000 | 1170000 | 1260000 |
| Energy consumption comparison | Percentage | - 7.7% | 0.0% | 7.1% |
| The electricity charge are saved | Member | -90000 | 0 | 83571 |
In the market not yet has takes into account the facility such as central air-conditioning handpiece Water Chilling Units and water pump, water tower based on total system energy efficiency indexes
It is combined the system of formula Energy Saving Control.Although in the market most automatic control systems can to central air conditioner refrigerating main frame or
Water pump, water tower carry out also being simple logical interlock between coordinated signals, but central air-conditioning refrigeration host computer, water pump, water tower.Base
This is upper to carry out energy saving optimizing for central air-conditioning refrigeration host computer, can not also be weighed with an index before optimal control with
Difference after optimal control.
Utility model content
The technical problems to be solved in the utility model is the deficiency for existing controlling system of central air conditioner, proposes one
The controlling system of central air conditioner based on efficiency is planted, realizes and the whole energy of computer room is optimized.The system provides a kind of center
Air conditioner refrigerating main frame, water pump, the monitoring of cooling tower real-time energy efficiency, metering, analyzing and diagnosing and the device of Automatic Optimal setting, effectively
Electric energy is saved on ground, and optimization can valid value.
To achieve the above object, the technical scheme that the utility model is taken is as follows：
A kind of controlling system of central air conditioner, including refrigeration host computer energy efficiency monitor and PLC control system, the refrigeration
Main frame energy efficiency monitor include refrigeration host computer efficiency control unit, central control unit one, refrigeration host computer refrigerating capacity collecting unit,
Refrigeration host computer power consumption collecting unit and outdoor temperature humidity collecting unit；The PLC control system includes central control unit two, led to
Interrogate at least any one control in unit and cooling water pump control unit, chilled water pump control unit and cooling tower control unit
Unit, it is characterised in that：
The refrigeration host computer efficiency control unit includes refrigeration host computer chilled water leaving water temperature optimization module, refrigeration host computer energy
Effect alarm and handover module, refrigeration host computer efficiency optimization module and underload cold-storage shut down control module.
Further, the refrigeration host computer chilled water leaving water temperature optimization module can gather single according to the outdoor temperature humidity
The outdoor temperature humidity data that member is collected export suitable chilled water leaving water temperature in the case of current humiture automatically, and can be real
When monitoring chilled water turnover water temperature difference, if the temperature difference is more than setting value, chilled water leaving water temperature can be reduced automatically negative to optimize
Lotus；
The refrigeration host computer efficiency alarm and handover module can monitor the energy valid value of refrigeration host computer in real time, if described can valid value
It can be alarmed less than setting value and remind operating personnel to be switched to the less refrigeration host computer of capacity；
The refrigeration host computer efficiency optimization module can Automatic Optimal refrigeration host computer energy valid value, if monitor it is described can valid value
Continue to certain time less than setting value, then can reduce refrigeration host computer chilled water leaving water temperature, actively improve the energy valid value；
Underload cold-storage, which shuts down control module, can monitor the rate of load condensate of refrigeration host computer in real time, if the load of the refrigeration host computer
Rate is less than setting value and continues to that certain time is still then switched to cold-storage operational mode without improvement, and the chilled water is gone out into water temperature
Degree is set to a setting minimum, when the temperature sensor in the refrigeration host computer refrigerating capacity collecting unit detects the freezing
When water leaving water temperature reaches the setting minimum, refrigeration host computer is closed down；When chilled water leaving water temperature goes back up to a setting value,
Automatic start refrigeration host computer.
Further, the central control unit two in the PLC control system is responsible for the operation of whole PLC control system；
Communication unit is responsible for carrying out real-time communication with the refrigeration host computer energy efficiency monitor and host computer；The cooling water pump control unit
Including frequency converter and pressure sensor, it is responsible for the frequency conversion optimization operation of control cooling water pump；The chilled water pump control unit bag
Frequency converter and temperature sensor are included, is responsible for the frequency conversion optimization operation of control chilled water pump；The cooling tower control unit includes temperature
Device and low voltage control device are controlled, is responsible for the start and stop of control cooling tower, or including frequency converter and temperature sensor, is responsible for control many
The frequency conversion optimization operation of platform cooling tower.
Further, the PLC control system includes cooling water pump control unit, chilled water pump control unit and cooling tower
Any one control unit in control unit.Above three control unit can be according to live actual demand independent assortment.
Further, the PLC control system includes cooling water pump control unit, chilled water pump control unit and cooling tower
Control unit.
Further, the refrigeration host computer refrigerating capacity collecting unit includes temperature sensor and flow sensor, the system
Cold main frame power consumption collecting unit includes current transformer, Voltage detector and intelligent power meter, outdoor temperature humidity collection list
Member includes being located at central air conditioner room separate ventilation, the Temperature Humidity Sensor of shady spot.
Relative to prior art, the utility model achieves beneficial technique effect：
(1) the utility model can accurate measurements directly perceived, measure each central air-conditioning refrigeration host computer, cooling water pump, chilled water pump,
The efficiency (kW/TON) of each equipment such as cooling tower, and the overall efficiency (kW/TON) of computer room, differentiate that each equipment and computer room are overall
Performance efficiency there is provided real-time energy efficiency optimization guide so that reach administration of energy conservation safeguard effect.
(2) the utility model can set the chilled water of refrigeration host computer to go out water temperature automatically according to the outdoor temperature humidity measured
Spend, can improve low-energy-efficiency situation automatically with automatic discrimination low-energy-efficiency and low load condition and enter underload cold-storage pattern, so that
Reach the purpose in energy-saving extension device life-span.
(3) the utility model can be suitably used for the Air Conditioning Facilities refrigeration plant of all main flows, include the center of each main brand
Air-conditioning especially factory or the refrigeration host computer and water pump, cooling tower of commercial and residential building space central air-conditioning, and all the time with energy efficiency indexes
For criterion, and possess efficiency data recording function, can very easily contrast the efficiency before and after Energy Saving Strategy input
Improvement situation.
(4) the utility model collects control technology, the network information technology, administrative skill, automatic safe early warning and diagnosis skill
Art, plant maintenance technology reduce manual operation and lost in the operational energy efficiency of one, effectively monitoring and optimization Air Conditioning Facilities unit equipment
Failure and energy waste caused by mistake or system and unit exception.
Brief description of the drawings
Fig. 1 is energy efficiency monitor structural representation disclosed in the utility model.
Fig. 2 is PLC control system structural representation disclosed in the utility model.
Embodiment
In order that the purpose of this utility model, technical scheme and advantage are more clearly understood, with reference to embodiments to this
Utility model is further elaborated, but the claimed scope of the utility model is not limited to following specific implementations
Example.
Referring to Fig. 1-2, controlling system of central air conditioner disclosed in the present embodiment include refrigeration host computer energy efficiency monitor and
PLC control system.Wherein, the refrigeration host computer energy efficiency monitor includes refrigeration host computer efficiency control unit, central control unit
First, refrigeration host computer refrigerating capacity collecting unit, refrigeration host computer power consumption collecting unit and outdoor temperature humidity collecting unit.Center control is single
Used between member one and refrigeration host computer refrigerating capacity collecting unit, refrigeration host computer power consumption collecting unit, outdoor temperature humidity collecting unit
RS485 serial communications.Wherein refrigerating capacity collecting unit is mainly made up of temperature sensor and flow sensor, power consumption collecting unit
It is made up of current transformer, voltage sense line and intelligent power meter.Outdoor temperature humidity collecting unit is main by being installed on center
Air Conditioning Facilities separate ventilation, the Temperature Humidity Sensor composition of shady spot.Refrigeration host computer efficiency control unit passes through I/O port and air-conditioning
The input of main frame, lead-out terminal are connected.All energy saving optimizing strategies are all exported to refrigeration host computer by I/O port, to reach control
The effect of refrigeration host computer processed.
The refrigeration host computer energy efficiency monitor is obtained cold by connecting the temperature on refrigeration unit pipeline, flow sensor
Freeze water turnover coolant-temperature gage, cooling water turnover coolant-temperature gage, chilled-water flow calculates the refrigerating capacity of handpiece Water Chilling Units.Its Computing Principle
It is as follows:
Q=C*L* Δs T (kW)；
The specific heat 4.1868kW*S/ (KG* DEG C) of C-water；L-chilled-water flow L/S (liter/second)；
Δ T-chilled water Inlet and outlet water temperature difference (DEG C)
3.516kW=1TON (USTR cold units made in U.S.A)；
P-total power input kW；Q-refrigerating capacity TON (USTR)；
By accessing the intelligent power module of unit power inleting terminal, the power consumption of handpiece Water Chilling Units is calculated.So as to calculate
Go out the energy valid value (refrigerating capacity/power consumption) of refrigeration host computer.
The efficiency E calculation formula of central air conditioner main machine are as follows：
E=P/Q (kW/TON)
The refrigeration host computer energy efficiency monitor obtains outdoor also by the Temperature Humidity Sensor outside Air Conditioning Facilities room
Warm and humid angle value.Wherein, the built-in four big energy-saving modules of the refrigeration host computer efficiency control unit, for central air-conditioning refrigeration host computer
Energy Saving Control, be respectively：
1st, refrigeration host computer chilled water leaving water temperature optimization module：By reference to outdoor temperature humidity, outdoor temperature humidity is changed
For enthalpy data, and the enthalpy data are compared with built-in high point enthalpy and low spot enthalpy, current humiture is exported automatically
In the case of optimum chilled water leaving water temperature, and in real time monitoring chilled water turnover water temperature difference, if excessive temperature differentials, efficiency prison
Chilled water leaving water temperature can be reduced automatically by surveying instrument, optimize load.
2nd, the alarm of refrigeration host computer efficiency and handover module：When energy efficiency monitor monitors that current refrigeration main frame efficiency is too low
When, energy efficiency monitor meeting alarm operating personnel, and can advise that operating personnel are switched to the small refrigeration host computer of other capacity.
3rd, refrigeration host computer efficiency optimization module：If the low situation of efficiency is continued for some time and (is preferably provided to 5 minutes)
And loseing improvement, energy efficiency monitor can reduce main frame chilled water leaving water temperature automatically and (temperature step-length preferably is set into 0.57
DEG C), actively improve the energy valid value of main frame.
4th, underload cold-storage shuts down control module；When energy efficiency monitor monitors that main unit load is too low, if the situation
Certain time (being preferably arranged to 1 minute) be continue for still without improvement, energy efficiency monitor is automatically set chilled water temperature to minimum
(being usually 7 DEG C), after sensor, which detects freezing temperature, reaches the minimum temperature of setting, is automatically stopped main frame operation.When cold
Freeze coolant-temperature gage and go back up to certain temperature value, system understands automatic start main frame, is allowed to rerun again.
The PLC control system includes central control unit two, communication unit and cooling water pump control unit, chilled water
At least any one control unit in pump control unit and cooling tower control unit.Wherein, central control unit is responsible for whole PLC
The operation of control system, communication unit is responsible for and the real-time communication of refrigeration host computer energy efficiency monitor and leading in real time for host computer computer
News, cooling water pump control unit is made up of frequency converter, pressure sensor, is responsible for the frequency conversion optimization operation of control cooling water pump.It is cold
Freeze water pump control unit to be made up of frequency converter, temperature sensor, be responsible for the frequency conversion optimization operation of control chilled water pump.Cooling tower control
Unit processed is made up of temperature controller with low voltage control device, is responsible for temperature control and the start and stop operation of control cooling tower, is worked as cooling tower
When inflow temperature is relatively low, cooling tower can be not turned on, when temperature reaches certain limit, and cooling tower starts.Wherein cooling water pump
Control unit, chilled water pump control unit, cooling tower control unit can be according to live actual demand independent assortments.Can only have
Wherein some or two units, can also three units exist simultaneously.
The announcement and teaching of book according to the above description, the utility model those skilled in the art can also be to above-mentioned reality
The mode of applying is changed and changed.Therefore, the utility model is not limited to embodiment disclosed and described above, right
Some modifications and changes of utility model should also be as falling into scope of the claims of the present utility model.Although in addition,
Some specific terms have been used in this specification, but these terms are merely for convenience of description, utility model do not constituted
Any limitation.
Claims (5)
1. a kind of controlling system of central air conditioner, including refrigeration host computer energy efficiency monitor and PLC control system, the refrigeration master
Machine energy efficiency monitor includes refrigeration host computer efficiency control unit, central control unit one, refrigeration host computer refrigerating capacity collecting unit, system
Cold main frame power consumption collecting unit and outdoor temperature humidity collecting unit；The PLC control system includes central control unit two, communication
At least any one control in unit and cooling water pump control unit, chilled water pump control unit and cooling tower control unit is single
Member, it is characterised in that：
The refrigeration host computer efficiency control unit includes refrigeration host computer chilled water leaving water temperature optimization module, refrigeration host computer efficiency report
Alert and handover module, refrigeration host computer efficiency optimization module and underload cold-storage shut down control module.
2. a kind of controlling system of central air conditioner according to claim 1, it is characterised in that：The PLC control system
In central control unit two be responsible for the operation of whole PLC control system；Communication unit is responsible for supervising with the refrigeration host computer efficiency
Survey instrument and host computer carries out real-time communication；The cooling water pump control unit includes frequency converter and pressure sensor, is responsible for control
The frequency conversion optimization operation of cooling water pump；The chilled water pump control unit includes frequency converter and temperature sensor, is responsible for control cold
Freeze the frequency conversion optimization operation of water pump；The cooling tower control unit includes temperature controller and low voltage control device, is responsible for control cooling
The start and stop of tower, or including frequency converter and temperature sensor, it is responsible for the frequency conversion optimization operation of many cooling towers of control.
3. a kind of controlling system of central air conditioner according to claim 2, it is characterised in that：The PLC control system
Including any one control unit in cooling water pump control unit, chilled water pump control unit and cooling tower control unit.
4. a kind of controlling system of central air conditioner according to claim 2, it is characterised in that：The PLC control system
Including cooling water pump control unit, chilled water pump control unit and cooling tower control unit.
5. a kind of controlling system of central air conditioner according to claim 1, it is characterised in that：The refrigeration host computer refrigeration
Measure collecting unit include temperature sensor and flow sensor, the refrigeration host computer power consumption collecting unit include current transformer,
Voltage detector and intelligent power meter, the outdoor temperature humidity collecting unit are included located at central air conditioner room separate ventilation, in the shade
The Temperature Humidity Sensor at place.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621439379.7U CN206377813U (en) | 2016-12-26 | 2016-12-26 | A kind of controlling system of central air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621439379.7U CN206377813U (en) | 2016-12-26 | 2016-12-26 | A kind of controlling system of central air conditioner |
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| Publication Number | Publication Date |
|---|---|
| CN206377813U true CN206377813U (en) | 2017-08-04 |
Family
ID=59408513
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621439379.7U Active CN206377813U (en) | 2016-12-26 | 2016-12-26 | A kind of controlling system of central air conditioner |
Country Status (1)
| Country | Link |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107940841A (en) * | 2017-11-22 | 2018-04-20 | 杨可欣 | A kind of refrigeration unit control system |
| CN108592331A (en) * | 2018-05-10 | 2018-09-28 | 深圳达实智能股份有限公司 | A kind of the cooling tower cooling mode control method and system of air-conditioning system |
| CN110160218A (en) * | 2019-06-05 | 2019-08-23 | 广东美的暖通设备有限公司 | The control device and system of central air-conditioning |
-
2016
- 2016-12-26 CN CN201621439379.7U patent/CN206377813U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107940841A (en) * | 2017-11-22 | 2018-04-20 | 杨可欣 | A kind of refrigeration unit control system |
| CN108592331A (en) * | 2018-05-10 | 2018-09-28 | 深圳达实智能股份有限公司 | A kind of the cooling tower cooling mode control method and system of air-conditioning system |
| CN110160218A (en) * | 2019-06-05 | 2019-08-23 | 广东美的暖通设备有限公司 | The control device and system of central air-conditioning |
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