CN1715798A - Control method for variable frequency precision air conditioner - Google Patents
Control method for variable frequency precision air conditioner Download PDFInfo
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- CN1715798A CN1715798A CN 200410026841 CN200410026841A CN1715798A CN 1715798 A CN1715798 A CN 1715798A CN 200410026841 CN200410026841 CN 200410026841 CN 200410026841 A CN200410026841 A CN 200410026841A CN 1715798 A CN1715798 A CN 1715798A
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Abstract
The frequency variable precise air conditioner is one kind of precise air conditioner, in which enthalpy difference control and frequency variable compressor are combined in realizing stepless energy regulation. By means of enthalpy value algorithm, the refrigerating system is controlled with enthalpy value as the combination of temperature and humidity, rather than single temperature or humidity and this result in lowered power consumption. The power supply frequency variator has output frequency determining the output power of compressor to realize stepless energy regulation of the air conditioner set within 0-130 %. The present invention has raised control precision and lower power consumption.
Description
Affiliated technical field
What the invention was related is field of heating ventilation air conditioning, a kind of new constant temperature and humidity air-conditioning system in the central air-conditioning field of saying so more specifically.
Technical background
At present, in the precision air conditioner field of commercialization, the compressor of refrigeration system generally all is to adopt invariable frequency compressor series, in the adjusting of energy, carries out energy adjustment by the operation quantity of control compressor.But no matter you adopt any invariable frequency compressor, and the performance curve of its energy adjustment all is a stepped transition curve, are not slick and sly curves.Be that this precision air conditioner control accuracy on control accuracy is not high, the shortcoming that energy loss is bigger.
The content of innovation and creation
The technical problem that the invention will solve is: provide a kind of system of novel precision air conditioner to solve the existing existing problem of precision air conditioner.By adopting frequency-changeable compressor to make unit operation more energy-conservation, the enthalpy difference control of employing combines with frequency-changeable compressor and realizes the stepless energy adjustment of precision air conditioner, makes the control accuracy of unit higher.
The content of the invention is: according to the control requirement of precision air conditioner, the control hardware of selecting for use is the DDC controller, and this controller has analog input, simulation output, numeral input and digital output interface.What controller adopted is+the 24VDC power supply normal voltage analog signal of 0～10V or 2～10V or output of the normalized current analog signal of 4～20mA and input.What select for use in the refrigeration system is frequency-changeable compressor (comprising frequency converter).The principle of its control is as follows:
A unique enthalpy all corresponding according to each humiture write a kind of control program that utilizes enthalpy to control compressor operating, and its control block diagram is shown in figure one.The enthalpy of the humiture correspondence that the enthalpy of the humiture correspondence that Temperature Humidity Sensor is sensed and user set compares by the enthalpy difference computing, export a PID controlling value (PID value) and give frequency converter, physical signalling is the standard analog signal of a 0～10V or 2～10V, 4～20mA.Computing formula is as follows:
In the computing of reality, for example, input is converted into the canonical variable of 0～10V, be about to set-point and process variables and be standardized into a magnitude of voltage between 0～10V.Simultaneously, guaranteeing to export also is the canonical variable of a 0～10V.
Calculate one according to pid algorithm like this and output signal to frequency converter, frequency converter is realized the frequency control of 10～120Hz according to the signal of DDC input.Thereby changed the refrigerating capacity of unit, realized that the cold of precision air conditioner is regulated.
By the enthalpy computing method, refrigeration system is in the control that is subjected to temperature or humidity separately, but the enthalpy that humiture combines is controlled.The enthalpy difference hour, system only need start the control requirement that heat temperature raising and little cold refrigeration can satisfy environment.Avoid a large amount of cooling dehumidifier and a large amount of heat temperature raisings, thereby saved energy consumption; When enthalpy difference was big, refrigeration system was given frequency converter according to the signal of the controlling value 0～10V of DDC output, by the power output of frequency converter decision compressor, thereby had realized that unit is from 0～130% stepless energy adjustment.Not only improved control accuracy but also saved energy consumption.
The advantage of the invention is: the invention has adopted advanced DDC control hardware in conjunction with PID (ratio, integration, differential) enthalpy difference algorithm, combines with frequency-changeable compressor, and the humiture that can control environment accurately is within certain scope.Adopt invariable frequency compressor to compare with tradition, energy-conservation more than 30%, and control accuracy is higher.The controller that adopts can detect on-the-spot various states in real time, inquires about states such as humiture current and that set.Can carry out on-the-spot humiture set point and various parameter control; comprise the FREQUENCY CONTROL that adds thermal control, the control of humidifier aperture, compressor; the correction of sensor and timed power on/off etc., and can monitor the running status of each parts, shut down and send alarm signal etc. when breaking down.
Figure of description
Accompanying drawing below in conjunction with unit is further detailed:
Fig. 1 is the FB(flow block) of this innovation and creation control;
Fig. 2 is the electrical schematic diagram of this innovation and creation unit;
The specific embodiment
Only under the situation of indoor fan operation, other parts could turn round in figure one.Otherwise unit can not be opened.Under the situation of the normal operation of blower fan, the enthalpy of the humiture correspondence that the user sets in the enthalpy of the humiture correspondence that Temperature Humidity Sensor is sensed and the DDC carries out computing.Draw a pid value (voltage or current signal) and give frequency converter.By the unlatching of frequency converter decision frequency-changeable compressor and the frequency of operation.Thereby the decision refrigerating capacity the size or the dehumidifying what.
Temperature control: adopt PID to regulate control, right the temperature of actual temperature of sensing and setting.When being higher than setting value, heater cuts out.When being lower than the temperature value of setting, the group number that the result who calculates according to PID decides heater to open.
Humidity control: the heat that adds of humidifier is controlled by the aperture of humidifier, and the aperture control of humidifier also is to be controlled by the PID operation result of DDC controller.
Its frequency conversion precision air conditioner system has frequency converter by the frequency-changeable compressor that connects in regular turn, oil eliminator, and blower fan (band motor), condenser, device for drying and filtering, expansion valve, magnetic valve, evaporimeter, electrical heating PTC, humidifier, hydraulic accumulator connects and composes.Can select different filters to control the cleanliness factor of room air according to the requirement of control in addition.
Claims (4)
1, a kind of precision air conditioner system that has adopted frequency-changeable compressor and DDC control, comprise the frequency-changeable compressor that connects in regular turn, with the suitable evaporimeter of compressor, heating PTC, humidifier, device for drying and filtering, blower fan, expansion valve, magnetic valve, condenser, hydraulic accumulator, oil eliminator, screen pack, sensing and control module, also comprise the DDC controller, it is characterized in that, the output interface of this DDC controller is connected with the DDC controller binding post of described control module, described sensing and control module come out the humiture of controlled environment and signal are sent to the DDC controller by sensor sensing, the user compares calculating from the enthalpy of the humiture correspondence of establishing by enthalpy difference in the enthalpy of the humiture correspondence that the DDC controller is sensed Temperature Humidity Sensor and the DDC controller, export a PID controlling value and give frequency converter, thus the work of control compressor assembly.
According to the described precision air conditioner system that has adopted frequency-changeable compressor and DDC control of claim 1, it is characterized in that 2, what refrigeration in this air-conditioning system and dehumidifying control were adopted is the frequency converter of DDC control compressor, the power output of frequency converter decision compressor.
According to the described frequency conversion precision air conditioner of claim 1 system, it is characterized in that 3, the frequency-changeable compressor that is provided with combines with DDC control, by signal being passed to the frequency that frequency converter is controlled compressor.
4, according to the described frequency conversion precision air conditioner of claim 1 system, it is characterized in that, adopted frequency-changeable compressor in this system, can realize the stepless energy adjustment and the high-precision control of unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410026841 CN1715798A (en) | 2004-04-13 | 2004-04-13 | Control method for variable frequency precision air conditioner |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200410026841 CN1715798A (en) | 2004-04-13 | 2004-04-13 | Control method for variable frequency precision air conditioner |
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| CN1715798A true CN1715798A (en) | 2006-01-04 |
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| CN 200410026841 Pending CN1715798A (en) | 2004-04-13 | 2004-04-13 | Control method for variable frequency precision air conditioner |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100595493C (en) * | 2006-04-14 | 2010-03-24 | 株式会社东芝 | Air conditioning controller |
| WO2010066076A1 (en) * | 2008-12-10 | 2010-06-17 | 深圳达实智能股份有限公司 | Energy saving air-conditioning control system based on predicted mean vote and method thereof |
| CN101839538A (en) * | 2010-05-17 | 2010-09-22 | 广东格兰仕集团有限公司 | Control method for operation modes of inverter air conditioner |
| CN103776211A (en) * | 2012-10-23 | 2014-05-07 | 珠海格力电器股份有限公司 | Variable frequency system and method and device for controlling same |
| CN104019528A (en) * | 2014-06-26 | 2014-09-03 | 东元总合科技（杭州）有限公司 | Efficient and energy-saving control algorithm for variable frequency air conditioner |
| CN104848504A (en) * | 2015-03-20 | 2015-08-19 | 江苏盈方智能科技有限公司 | Date computer room precise air-conditioning energy-saving system based on enthalpy value intelligent temperature control optimization algorithm and operating method thereof |
| CN104515334B (en) * | 2013-09-30 | 2016-10-19 | 海尔集团公司 | A kind of control method for frequency of air-conditioning heating pattern |
| CN110159517A (en) * | 2019-05-29 | 2019-08-23 | 深圳市深蓝新能源电气有限公司 | The variable frequency drives and heat preserving method of frequency-changeable compressor heat insulation function can be achieved |
-
2004
- 2004-04-13 CN CN 200410026841 patent/CN1715798A/en active Pending
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100595493C (en) * | 2006-04-14 | 2010-03-24 | 株式会社东芝 | Air conditioning controller |
| WO2010066076A1 (en) * | 2008-12-10 | 2010-06-17 | 深圳达实智能股份有限公司 | Energy saving air-conditioning control system based on predicted mean vote and method thereof |
| CN101828082B (en) * | 2008-12-10 | 2012-06-06 | 深圳达实智能股份有限公司 | Energy saving air-conditioning control system based on average heat sensing index and method thereof |
| CN101839538A (en) * | 2010-05-17 | 2010-09-22 | 广东格兰仕集团有限公司 | Control method for operation modes of inverter air conditioner |
| CN101839538B (en) * | 2010-05-17 | 2013-06-26 | 广东格兰仕集团有限公司 | Control method for operation modes of inverter air conditioner |
| CN103776211A (en) * | 2012-10-23 | 2014-05-07 | 珠海格力电器股份有限公司 | Variable frequency system and method and device for controlling same |
| CN103776211B (en) * | 2012-10-23 | 2016-03-30 | 珠海格力电器股份有限公司 | Frequency conversion system and control method thereof and control device |
| CN104515334B (en) * | 2013-09-30 | 2016-10-19 | 海尔集团公司 | A kind of control method for frequency of air-conditioning heating pattern |
| CN104019528A (en) * | 2014-06-26 | 2014-09-03 | 东元总合科技（杭州）有限公司 | Efficient and energy-saving control algorithm for variable frequency air conditioner |
| CN104019528B (en) * | 2014-06-26 | 2016-06-22 | 东元总合科技（杭州）有限公司 | The energy-efficient operating control algolithm of convertible frequency air-conditioner |
| CN104848504A (en) * | 2015-03-20 | 2015-08-19 | 江苏盈方智能科技有限公司 | Date computer room precise air-conditioning energy-saving system based on enthalpy value intelligent temperature control optimization algorithm and operating method thereof |
| CN110159517A (en) * | 2019-05-29 | 2019-08-23 | 深圳市深蓝新能源电气有限公司 | The variable frequency drives and heat preserving method of frequency-changeable compressor heat insulation function can be achieved |
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