CN205261848U - Central air conditioning's follow -up control power saving device - Google Patents
Central air conditioning's follow -up control power saving device Download PDFInfo
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- CN205261848U CN205261848U CN201520996908.2U CN201520996908U CN205261848U CN 205261848 U CN205261848 U CN 205261848U CN 201520996908 U CN201520996908 U CN 201520996908U CN 205261848 U CN205261848 U CN 205261848U
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Abstract
The utility model provides a central air conditioning's follow -up control power saving device, central air -conditioning system is by cooling water pump, freezing water pump, cooling tower fan, the cooling water set, the moisturizing pump, cooling tower and fan coil constitute, wherein, the cooling water set is by the compressor, the condenser becomes with evaporator assembly, by microprocessor automatic control, cooling water inlet at central air -conditioning system, the refrigerated water export, the coolant outlet, install temperature sensor in the refrigerated water import, temperature sensor respectively with the PLC controller, the PLC controller connects to central air -conditioning system cooling water pump motor and freezing water pump motor after connecting the converter. Central air -conditioning system has been solved to this device because " the large -traffic little difference in temperature " and cause the extravagant problem of electric energy, through detecting the refrigerated water, the cooling water is intake a little and going out the temperature difference of water spot, through change motor running frequency dynamic adjustment flow, reaches the purpose of saving electric energy.
Description
Technical field
The utility model relates to a kind of refrigeration system battery saving arrangement, relates in particular to a kind of battery saving arrangement regulating of following the tracks of for central air-conditioning.
Background technology
Central air-conditioning provides convenient to people's life, constantly rises in the status in people's life. can bring nice and coolly for people in summer, and the winter can provide warm for people. although the application of air-conditioning is constantly universal, but it is in energy consumption, in efficiency, all there is certain defect, be unfavorable for carrying out environmental protection and energy saving, and along with today of economic and social development, since the I999 Chinese Academy of Sciences proposes sustainable development view, within 2005, eleventh five year plan provides energy-saving and emission-reduction, sustainable development and energy-saving and emission-reduction have become new trend, under the call energetically of State Council of the Party Central Committee, the attention that this theory is constantly subject to broad masses of the people is widely used after central air-conditioning invents, not only application in the family, topmostly be applied to large-scale entering the court, hotel, the public places such as office building, give user in life, when work, there is suitable temperature, at all seasons, there is comfortable environment.
Under the trend of energy-saving and emission-reduction, and along with the development of modern science and technology, electric automatization is applied to the technical essential of central air-conditioning and arises at the historic moment, and central air-conditioning is also become better and better about the performance of environmental protection and energy saving. But regrettably, although the advantage of central air-conditioning is more and provide comfortable can to people's life, but because the needed energy of its powerful equipment is larger, and known with regard to current central air-conditioning research, its energy-saving effect allows of no optimist, and this brings larger puzzlement to the user who uses. But along with the development situation of global climate is severe gradually, the temperature in summer constantly rise and winter also more and more colder, people continue to increase the demand of central air-conditioning, and research and application that electric automatization is applied to the correlation technique of central air-conditioning seem more and more important. And being well applied to central air-conditioning, Electric automation technology will bring glad tidings for people's life.
Along with the aggravation of global integration process, China's economy is flourish, and national life level also improves constantly, also more and more higher for the demand of electric energy. And these several years, high energy-consuming industry constantly increases, and electric coal total supply is not enough and prerssure on transport has restricted supply of electric power ability, the contradiction of supply of electric power end. All successively there is " severe power shortage " in whole nation each province of China, city, China Electricity Council represented on May 17th, 2014, China is faced with since two thousand four maximum once " severe power shortage ", scope and the degree of depth are unprecedented, 2004, the whole nation powered breach in 2000 myriawatts, but by 2014, whole nation power supply breach rises to 3,000 ten thousand kilowatts of left and right, is equivalent to the generating total amount in two Anhui or three Chongqing. In order to alleviate severe power shortage, national multiple provinces and cities frequently take the mode of uninterrupted power cuts to limit consumption, and the phenomenon of short of electricity is constantly expanded, and the present situation of electric energy cannot meet people's life requirement gradually. Add the continuous consumption of non-renewable resources, and cannot again produce, the exploitation that adds emerging energy is more difficult with promoting, this all means that power resource will constantly cannot meet the demand of the citizen under growing national economy, and the execution of the concrete action of society to energy-conserving and environment-protective has become very urgent.
Development and the growth in the living standard of society's all our undertakings are all indicating that air-conditioning equipment importance will improve constantly, and need to consume a large amount of electric power when the use of central air-conditioning, this is its outstanding feature the most, and from the data of being correlated with, in skyscraper, the half that approaches of the power consumption of its entire building is all produced by central air-conditioning. Under this background, carry out the system reform of central air-conditioning, it is obviously the wisest way that electric automatization is applied in to the waste that reduces the energy in central air-conditioning.
Known according to relevant data, in central air conditioner system, its cold source system is power consumption the most, and even the power consumption of some large-scale cold source systems is to reach megawatt, and its power consumption of water pump system wherein just exceedes 200 kilowatts.
If solved a greater part of of central air-conditioning energy consumption issues so can solve the power consumption problem of cold source system by meaning.
Because China's its economy of most of areas and technical merit are limited, the distance control mode that its central air-conditioning uses in most of areas is all relatively simple, even in older building, still has manual mode, and this just means that its control model is underaction. No matter be simple distance control mode or manual mode, it is each that this all needs a large amount of staff to carry out the standard of open and close machine work, even also needs corresponding team on duty to carry out the round-the-clock operation to the central air-conditioning management that exercises supervision. This can cause will consuming a large amount of manpowers in central air-conditioning uses. In addition, generally after central air-conditioning start, user can not use at once, although and load is during this period of time little, the refrigerating capacity of main frame is very large, the degree aggravation that this situation that supply falls short of demand is wasted the energy. In like manner, in the time of shutdown, because staff will look after each user, so generally need to wait until and determine that all users stop just shutting down to after the use of central air-conditioning, and often user can not shut down at one time, this just means has had the user of part to stop using air-conditioning already in the time that staff carries out power-off operation, and this has carried out again the waste of resource. This just means that the open and close machine operation that can not carry out in time central air conditioner system staff all can cause great waste to electric energy.
The detection of central air-conditioning is to have staff to carry out patrolling and examining of machine room after several hours, then according to actual conditions, if its result is talked about preferably, the number of times of patrolling and examining can be reduced. For staff, daily requirement record is assaulted the main target with the water temperature of water lines and the climate condition on the same day etc., and judges the pressure condition of refrigeration unit by above information, if the same day, situation was comparatively special, data etc. are being offered to higher level, having special staff to process. General its testing result is good, but the efficiency of its detection is not high. In addition, the water pump in central air-conditioning is often the state in excess load, and this will cause water pump to there will be malfunctioning situation, thereby can cause the running efficiency continuous decrease of central air-conditioning, and the electric weight that makes central air-conditioning consumption is constantly increased.
Summary of the invention
The purpose of this utility model is to provide a kind of can variation at any time and the central air-conditioning of dynamic auto adjusting live load is followed the tracks of the battery saving arrangement regulating along with ambient temperature, has solved the serious problem of current most of central air-conditioning waste of energy in actual motion.
The utility model solves the technical scheme that its technical problem adopts:
A kind of tracking adjusting power-saving device of central air-conditioning, central air conditioner system is by cooling water pump, chilled water pump, blower fan of cooling tower, handpiece Water Chilling Units, small pump, cooling tower and fan coil composition, wherein, handpiece Water Chilling Units is by compressor, condenser and evaporimeter composition, automatically controlled by microprocessor, at the cooling water inlet of central air conditioner system, chilled water outlet, coolant outlet, in chilled water import temperature sensor is installed, temperature sensor respectively with PLC controller, PLC controller is connected to central air conditioner system cooling water pump motor and refrigerating water pump motor after connecting frequency converter.
Preferably, described temperature sensor uses the platinum resistance thermometer sensor, that be varied to direct ratio of resistance with temperature, and platinum resistance temp transmitter is directly installed in platinum resistance thermometer sensor, terminal box, will, resistance signal is converted into two-wire system and is sent to PLC controller.
Preferably, on described PLC controller, integrated communication interface can supply the communication of RS-485 cable, and connects and show touch-screen, is used for display system duty and warning message.
Preferably, described PLC controller is connected with chilled water pump switch board, cooling water pump switch board and blower fan tower small pump switch board respectively.
Preferably, the Capacity Selection of described frequency converter will ensure that the rated current of frequency converter is greater than the rated current of this motor, or the adaptive motor power (output) of frequency converter is greater than the power of current this motor.
Operation principle of the present utility model is: mainly by PLC controller and electric, electronic component structure figure tracking electricity-saving control system. utilization is arranged on respectively the water entry of central air conditioner system chilled water, cooling water and four temperature sensors of EXIT POINT carry out dynamic temperature collection, temperature signal after collection is converted to 4 ~ 20mA signal input PLC controller by temperature transmitter, PLC controller will calculate described chilled water, the temperature difference of cooling water water entry and EXIT POINT, and compare computing with the temperature difference of setting, described temperature difference is adjusted into described design temperature difference signal and exports to frequency converter, frequency converter reduces or improves described chilled water pump and cooling water pump by changing output frequency, thereby reduce or increase periodical feeding switching traffic in pipeline, thereby reach the object of economize on electricity, simultaneously, also meet the needs of refrigerating environment temperature constant.
In the course of the work, because described frequency converter can be realized soft start function, the impact to electrical network can effectively reduce electric motor starting time, also can extend service life of motor; Because described frequency converter is certainly as capacitive load; the effectively inductive load of absorption refrigerating water pump and cooling water pump; thereby improve chilled water pump and cooling water pump motor power factor; reduce the idle line loss of motor operation; simultaneously; described frequency converter also can be realized turn-off protection and the warning functions such as overcurrent, overload, overvoltage, can effectively protect the safe operation of central air conditioner system.
The beneficial effects of the utility model:
1, solved central air conditioner system because " the large flow little temperature difference " causes the problem of waste of energy, by detecting the temperature difference of chilled water, cooling water water entry and EXIT POINT, by changing motor running frequency dynamic adjustments flow, reach the object of saving electric energy.
2, the power factor that has improved central air conditioner system chilled water pump and cooling water pump motor, has reduced idle line loss, has reached the object of saving electric energy.
Turn-off protection and the warning functions such as the overcurrent that 3, provides, overload, overvoltage, can effectively protect the safe operation of central air conditioner system.
Brief description of the drawings
Fig. 1: the tracking adjusting power-saving device schematic diagram of the utility model central air-conditioning;
Fig. 2: the closed-loop control system block diagram of cooling water;
Fig. 3: the closed-loop control block diagram of chilled water pump.
Detailed description of the invention
Below in conjunction with accompanying drawing, the utility model is further described:
As shown in Figure 1: a kind of tracking adjusting power-saving device of central air-conditioning, central air conditioner system is by cooling water pump, chilled water pump, blower fan of cooling tower, handpiece Water Chilling Units, small pump, cooling tower and fan coil composition, wherein, handpiece Water Chilling Units is by compressor, condenser and evaporimeter composition, automatically controlled by microprocessor, at the cooling water inlet of central air conditioner system, chilled water outlet, coolant outlet, in chilled water import temperature sensor is installed, temperature sensor respectively with PLC controller, PLC controller is connected to central air conditioner system cooling water pump motor and refrigerating water pump motor after connecting frequency converter.
Preferably, described temperature sensor uses the platinum resistance thermometer sensor, that be varied to direct ratio of resistance with temperature, and platinum resistance temp transmitter is directly installed in platinum resistance thermometer sensor, terminal box, will, resistance signal is converted into two-wire system and is sent to PLC controller.
Preferably, on described PLC controller, integrated communication interface can supply the communication of RS-485 cable, and connects and show touch-screen, is used for display system duty and warning message.
Preferably, described PLC controller is connected with chilled water pump switch board, cooling water pump switch board and blower fan tower small pump switch board respectively.
Preferably, the Capacity Selection of described frequency converter will ensure that the rated current of frequency converter is greater than the rated current of this motor, or the adaptive motor power (output) of frequency converter is greater than the power of current this motor.
Operation principle of the present utility model is: mainly by PLC controller and electric, electronic component structure figure tracking electricity-saving control system. utilization is arranged on respectively the water entry of central air conditioner system chilled water, cooling water and four temperature sensors of EXIT POINT carry out dynamic temperature collection, temperature signal after collection is converted to 4 ~ 20mA signal input PLC controller by temperature transmitter, PLC controller will calculate described chilled water, the temperature difference of cooling water water entry and EXIT POINT, and compare computing with the temperature difference of setting, described temperature difference is adjusted into described design temperature difference signal and exports to frequency converter, frequency converter reduces or improves described chilled water pump and cooling water pump by changing output frequency, thereby reduce or increase periodical feeding switching traffic in pipeline, thereby reach the object of economize on electricity, simultaneously, also meet the needs of refrigerating environment temperature constant.
In the course of the work, because described frequency converter can be realized soft start function, the impact to electrical network can effectively reduce electric motor starting time, also can extend service life of motor; Because described frequency converter is certainly as capacitive load; the effectively inductive load of absorption refrigerating water pump and cooling water pump; thereby improve chilled water pump and cooling water pump motor power factor; reduce the idle line loss of motor operation; simultaneously; described frequency converter also can be realized turn-off protection and the warning functions such as overcurrent, overload, overvoltage, can effectively protect the safe operation of central air conditioner system.
As shown in Figure 2, handpiece Water Chilling Units is carried out heat exchange, when water temperature is cooling, will discharge a large amount of heats. This heat be cooled water absorb, be cooling water temperature raise. Coolant pump is pressed into cooling tower by having risen warm cooling water, makes it to carry out heat exchange with atmosphere in cooling tower, and then has fallen warm cooling water, sends back to handpiece Water Chilling Units. So constantly circulation, takes away the heat that handpiece Water Chilling Units discharges.
Because the water temperature of cooling tower changes with environment temperature, its one-sided water temperature can not reflect exactly freezing unit produce heat number. So, for cooling water pump, using intake and the temperature difference of backwater as controlling foundation, the constant difference control realizing between water inlet and backwater is more rational. The temperature difference is large, illustrates that the heat of freezing unit generation is large, should improve the rotating speed of coolant pump, increases the circulation rate of cooling water; Otherwise should reduce rotating speed.
This programme has certain cooling water flow out of in the case of ensureing cooling tower, regulates cooling water flow by the output frequency of controlling frequency converter, in the time that central air-conditioner cooling water leaving water temperature is low, reduces cooling water flow; In the time that central air-conditioner cooling water leaving water temperature is high, strengthens cooling water flow, thereby reach the object that is issued to energy efficiency in the prerequisite that ensures the normal work of central air-conditioning unit.
As shown in Figure 3, chilled water system is made up of refrigerating water pump and chilled water pipeline, and the chilled water flowing out from handpiece Water Chilling Units is sent into chilled water pipeline by refrigerating water pump pressurization, carries out heat exchange in individual room, takes away heat in room, thereby the temperature in room is declined.
In the situation that ensureing that least significant end equipment chilled-water flow is supplied with, determine the minimum frequency of operation of refrigerating water pump frequency converter work, be set as lower frequency limit locking, the frequency adjustment of frequency conversion chilled water pump is that the temperature sensor by being arranged on chilled water system backwater supervisor detects chilled water return water temperature, the temperature of setting via temperature controller is again controlled the frequency increase and decrease of frequency converter, and control mode is: the electrodeless rise of frequency when freezing return water temperature is greater than design temperature.
Claims (5)
1. the tracking adjusting power-saving device of a central air-conditioning, central air conditioner system is by cooling water pump, chilled water pump, blower fan of cooling tower, handpiece Water Chilling Units, small pump, cooling tower and fan coil composition, wherein, handpiece Water Chilling Units is by compressor, condenser and evaporimeter composition, automatically controlled by microprocessor, it is characterized in that: at the cooling water inlet of central air conditioner system, chilled water outlet, coolant outlet, in chilled water import temperature sensor is installed, temperature sensor respectively with PLC controller, PLC controller is connected to central air conditioner system cooling water pump motor and refrigerating water pump motor after connecting frequency converter.
2. the tracking adjusting power-saving device of central air-conditioning according to claim 1, it is characterized in that: described temperature sensor uses the platinum resistance thermometer sensor, that be varied to direct ratio of resistance with temperature, platinum resistance temp transmitter is directly installed in platinum resistance thermometer sensor, terminal box, will, resistance signal is converted into two-wire system and is sent to PLC controller.
3. the tracking adjusting power-saving device of central air-conditioning according to claim 1, is characterized in that: on described PLC controller, integrated communication interface can supply the communication of RS-485 cable, and connects and show touch-screen, is used for display system duty and warning message.
4. the tracking adjusting power-saving device of central air-conditioning according to claim 1, is characterized in that: described PLC controller is connected with chilled water pump switch board, cooling water pump switch board and blower fan tower small pump switch board respectively.
5. central air-conditioning digital intelligent battery saving arrangement according to claim 1, it is characterized in that: the Capacity Selection of described frequency converter will ensure that the rated current of frequency converter is greater than the rated current of this motor, or the adaptive motor power (output) of frequency converter is greater than the power of current this motor.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520996908.2U CN205261848U (en) | 2015-12-07 | 2015-12-07 | Central air conditioning's follow -up control power saving device |
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| CN201520996908.2U CN205261848U (en) | 2015-12-07 | 2015-12-07 | Central air conditioning's follow -up control power saving device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105943146A (en) * | 2016-05-14 | 2016-09-21 | 苏州苏南捷迈得医疗器械有限公司 | Shape-memory alloy bone fixation plate cooling machine |
| CN107676926A (en) * | 2017-09-25 | 2018-02-09 | 上海三环节能科技发展股份有限公司 | A kind of central air conditioner intelligent control system |
| CN114811989A (en) * | 2022-05-23 | 2022-07-29 | 江苏拓米洛环境试验设备有限公司 | Cascade refrigeration system and control method thereof |
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2015
- 2015-12-07 CN CN201520996908.2U patent/CN205261848U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105943146A (en) * | 2016-05-14 | 2016-09-21 | 苏州苏南捷迈得医疗器械有限公司 | Shape-memory alloy bone fixation plate cooling machine |
| CN107676926A (en) * | 2017-09-25 | 2018-02-09 | 上海三环节能科技发展股份有限公司 | A kind of central air conditioner intelligent control system |
| CN114811989A (en) * | 2022-05-23 | 2022-07-29 | 江苏拓米洛环境试验设备有限公司 | Cascade refrigeration system and control method thereof |
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