CN105546896A - Control device for cooling air volume of outdoor condenser - Google Patents
Control device for cooling air volume of outdoor condenser Download PDFInfo
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- CN105546896A CN105546896A CN201610134571.3A CN201610134571A CN105546896A CN 105546896 A CN105546896 A CN 105546896A CN 201610134571 A CN201610134571 A CN 201610134571A CN 105546896 A CN105546896 A CN 105546896A
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- air valve
- condensing pressure
- electric air
- electric
- telecommunication
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2600/00—Control issues
- F25B2600/11—Fan speed control
- F25B2600/111—Fan speed control of condenser fans
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention belongs to the technical field of cooling air volume control of cooling devices and relates to a control device for the cooling air volume of an outdoor condenser. According to a body structure of the control device, a condensing pressure sensor is installed and fixed to a condenser liquid collecting main pipe through a condensing pressure capillary pipe, a PLC central controller is connected with the condensing pressure sensor, a draught fan frequency converter, an electric air valve controller and an alternating current contactor through a line, the draught fan frequency converter and the alternating current contactor are connected with a frequency conversion draught fan, the electric air valve controller is connected to an electric air valve electric executor, the electric air valve electric executor is in mechanical linkage with an electric air valve plate, and the draught fan frequency converter and the electric air valve controller are connected to a power frequency power supply line. The control process comprises the steps of converting electric signals, controlling the exhaust air rate of the frequency conversion draught fan and controlling the supply air rate of an electric air valve. The supply air rate of the condenser can be automatically and linearly controlled, and the control device is scientific in control principle, simple in structure, convenient to use, high in control precision, low in energy consumption, long in service life and reliable in control.
Description
Technical field:
The invention belongs to the cooling air quantity control technology field of refrigeration plant, relate to a kind of control device of outdoor condenser cooling air quantity, particularly a kind of device that foundation condensing pressure size controls outdoor condenser cooling air quantity under the low temperature environment of outdoor pole.
Background technology:
At present, the outdoor condenser of the refrigeration plants such as industrial air-conditioning unit and freezer unit is generally the fin-tube heat exchanger of band blower fan, and it is walked heat by rising ventilating air temperature band and reduces condensation temperature.This heat exchange mode is in outdoor environment temperature lower season, heat exchange efficiency is higher, but when outdoor environment temperature is extremely low, run because unit occurs that low-voltage variation affects on the contrary and produce, the industrial air-conditioning unit to outdoor environment heat extraction of such as whole year operation and freezer unit are in the winter time under operating mode, particularly when the dew-point temperature of outdoor environment temperature lower than unit process air, because outdoor inlet air temperature of condenser is too low, condensation temperature is reduced gradually, thus condensing pressure is reduced thereupon, and condensing pressure reduces to cause evaporating pressure to decline, unit refrigeration performance worsens, until unit self carries out low-voltage variation and shuts down, result not only affects the stability of unit ventilation temperature and humidity, and then affect air conditioner surroundings and plant produced in factory building, if things go on like this, the service life of air-conditioner set is also influenced.
Low voltage failure is there is in the winter time for avoiding unit, in prior art, it suitably reduces intake volume normally to outdoor condenser parcel canvas, or by installing pressure controller additional to increase or reduce the cooling blower quantity of work, these two kinds of improved devices can prevent low voltage failure to a certain extent, but when outside air temperature changes, the method of parcel canvas needs the manually wrapped air-admitting surface of adjustment, reach the object changing cooling air quantity, person works's amount is added because can not automatically regulate, degree of regulation is difficult to ensure simultaneously, and blower fan still power frequency operation, waste a large amount of electric energy, install pressure controller additional to increase and decrease the device of blower fan number, the fluctuation of condensing pressure is easily caused in fan starting and stopped process, have impact on the stable of evaporating temperature, and frequent start-stop easily causes service life of fan to shorten, be unfavorable for that the long-term stability of unit is run.Therefore, seek the control device designing a kind of outdoor condenser cooling air quantity, pressure in condenser is converted to the signal of telecommunication, ratio aperture and the intake of Electric air valve valve block is controlled by the signal of telecommunication, controlled operating frequency and the rotating speed of frequency conversion fan by the signal of telecommunication, reach the object controlling exhaust air rate, and reduce operation blower fan number according to actual needs, meet low air quantity operating mode and power conservation requirement, this technical scheme there is not yet report so far.
Summary of the invention:
The object of the invention is to the shortcoming overcoming prior art existence, the control device of a kind of outdoor condenser cooling air quantity of design is proposed, to solve, manually adjustment air-admitting surface workload is large, low precision and the large problem of power consumption, solves the problem adopting the unstable and service life of fan of the condensing pressure fluctuation, the evaporating temperature that cause in pressure controller increase and decrease working fan quantity process to shorten.
In order to realize foregoing invention object, the control device of the outdoor condenser cooling air quantity that the present invention relates to, its agent structure comprises: condensing pressure sensor, fan frequency converter, frequency conversion fan, Electric air valve YE, Electric air valve valve block, Electric air valve controller, condenser liquid collecting mother pipe, PLC central controller, A.C. contactor, casing of outdoor, condensing pressure capillary, condensing pressure holding wire, transducer power output line, Electric air valve controller power stage line, power frequency supply lines, inverter control signal line, A.C. contactor control signal wire and Electric air valve controller control signal line, condensing pressure sensor is fixed on the female pipe of condenser liquid collecting by condensing pressure capillary, and condensing pressure capillary and the female pipe of condenser liquid collecting are connected, PLC central controller is by condensing pressure holding wire, inverter control signal line, Electric air valve controller control signal line and A.C. contactor control signal wire, connect with the top-stitching of condensing pressure sensor, fan frequency converter, Electric air valve controller and A.C. contactor respectively, setting program instruction in PLC central controller, connected by transducer power output line line between fan frequency converter and frequency conversion fan above, connected by transducer power output line line between fan frequency converter and A.C. contactor, connected by transducer power output line line between A.C. contactor and frequency conversion fan below, Electric air valve valve block is arranged on the air inlet of casing of outdoor, Electric air valve controller is connected on Electric air valve YE by Electric air valve controller power stage line, mechanical linkage between Electric air valve YE and Electric air valve valve block, fan frequency converter and Electric air valve controller are connected on power frequency supply lines respectively, and power frequency supply lines connects the power supply of peripheral hardware, the programmed instruction set in PLC central controller can also enroll optimizer instruction according to order below: when condensing pressure reduces and needs to reduce air quantity, according to reducing frequency converter output frequency, reducing the order action successively running blower fan number, reduce Electric air valve aperture, when condensing pressure raises and needs to increase air quantity, according to increasing Electric air valve aperture, improving frequency converter output frequency, increasing the order action successively running blower fan number, thus improve energy-saving effect.
The control procedure of the outdoor condenser cooling air quantity control device that the present invention relates to comprises signal of telecommunication conversion, controls frequency conversion fan exhaust air rate and controls Electric air valve intake three part, and concrete control procedure is:
(1) signal of telecommunication conversion: condenser liquid collecting female pipe internal condensation pressure is passed to condensing pressure sensor by condensing pressure capillary, condensing pressure is converted to voltage and is greater than 0 and is less than 10V or electric current and is greater than the signal of telecommunication that 4mA is less than 20mA by condensing pressure sensor, the signal of telecommunication of condensing pressure sensor increases along with the raising of condensing pressure, the signal of telecommunication of condensing pressure sensor reduces along with the reduction of condensing pressure, and the ratio realizing condensing pressure signal and the signal of telecommunication is changed;
(2) frequency conversion fan exhaust air rate is controlled: the signal of telecommunication that step (1) is changed is flowed to PLC central controller by condensing pressure holding wire by condensing pressure sensor, PLC central controller judges the condensing pressure signal of telecommunication according to programmed instruction, then by inverter control signal line, A.C. contactor control signal wire outputs a control signal to fan frequency converter and A.C. contactor respectively, electric energy after frequency-conversion processing is transferred to frequency conversion fan and A.C. contactor above respectively by transducer power output line according to the control signal of PLC central controller by the fan frequency converter that power supply drives, A.C. contactor by the delivery of electrical energy of transducer power output line just after frequency-conversion processing to frequency conversion fan below, thus the operating frequency of control two frequency conversion fans and rotating speed increase along with the increase of step (1) switching electrical signals, the operating frequency and the rotating speed that control frequency conversion fan reduce along with the reduction of step (1) switching electrical signals, and then Linear Control intake, and can setting program instruction make PLC central controller by A.C. contactor control signal line traffic control A.C. contactor as required, realize reducing the low air quantity operating mode running blower fan number, meet power conservation requirement,
(3) Electric air valve intake is controlled: the signal of telecommunication that step (1) is changed is flowed to PLC central controller by condensing pressure holding wire by condensing pressure sensor, PLC central controller judges the condensing pressure signal of telecommunication according to programmed instruction, then Electric air valve controller is output a control signal to by Electric air valve controller control signal line, power frequency electric is sent to air-valve YE by Electric air valve controller power stage line according to the control signal of PLC central controller by the Electric air valve controller that power supply drives, thus control rotating and the action ratio of Electric air valve YE, and then the aperture controlling to be arranged on the Electric air valve valve block of casing of outdoor air inlet increases along with the increase of step (1) switching electrical signals, the aperture of Electric air valve valve block reduces along with the reduction of step (1) switching electrical signals, realize the Linear Control of Electric air valve intake.
Compared with prior art, can control condenser intake, its control principle science, simple process by auto linear, control accuracy is high, and save manpower, energy consumption is low, failure rate is low, and the life-span is long in the present invention; Its control appliance structure is simple, and control reliable, wide accommodation, control environment close friend.
Accompanying drawing illustrates:
Fig. 1 is the Facad structure principle schematic of air-conditioner outdoor unit of the present invention.
Fig. 2 is the structure principle schematic of air-conditioner outdoor unit of the present invention.
Fig. 3 is automatic control flow chart structural principle schematic diagram of the present invention.
Detailed description of the invention:
Below by specific embodiment, also the invention will be further described by reference to the accompanying drawings.
Embodiment:
The control device of the outdoor condenser cooling air quantity that the present embodiment relates to, its agent structure comprises: condensing pressure sensor 1, fan frequency converter 2, frequency conversion fan 3, Electric air valve YE 4, Electric air valve valve block 5, Electric air valve controller 6, the female pipe 7 of condenser liquid collecting, PLC central controller 8, A.C. contactor 9, casing of outdoor 10, condensing pressure capillary 11, condensing pressure holding wire 12, transducer power output line 13, Electric air valve controller power stage line 14, power frequency supply lines 15, inverter control signal line 16, A.C. contactor control signal wire 17 and Electric air valve controller control signal line 18, condensing pressure sensor 1 is fixed on the female pipe 7 of condenser liquid collecting by condensing pressure capillary 11, and condensing pressure capillary 11 is connected with the female pipe 7 of condenser liquid collecting, PLC central controller 8 is by condensing pressure holding wire 12, inverter control signal line 16, Electric air valve controller control signal line 18 and A.C. contactor control signal wire 17, connect with the top-stitching of condensing pressure sensor 1, fan frequency converter 2, Electric air valve controller 6 and A.C. contactor 9 respectively, setting program instruction in PLC central controller 8, connected by transducer power output line 13 line between fan frequency converter 2 and frequency conversion fan 3 above, connected by transducer power output line 13 line between fan frequency converter 2 and A.C. contactor 9, connected by transducer power output line 13 line between A.C. contactor 9 and frequency conversion fan below 3, Electric air valve valve block 5 is arranged on the air inlet of casing of outdoor 10, Electric air valve controller 6 is connected on Electric air valve YE 4 by Electric air valve controller power stage line 14, mechanical linkage between Electric air valve YE 4 and Electric air valve valve block 5, fan frequency converter 2 and Electric air valve controller 6 are connected on power frequency supply lines 15 respectively, and power frequency supply lines 15 connects the power supply of peripheral hardware.
In the present embodiment, the programmed instruction of setting in PLC central controller 8 can also enroll optimizer instruction according to order below: when condensing pressure reduces and needs to reduce air quantity, according to reducing frequency converter output frequency, reducing the order action successively running blower fan number, reduce Electric air valve aperture; When condensing pressure raises and needs to increase air quantity, according to increasing Electric air valve aperture, improving frequency converter output frequency, increasing the order action successively running blower fan number, thus improve energy-saving effect.
The control procedure of the outdoor condenser cooling air quantity control device that the present embodiment relates to comprises signal of telecommunication conversion, controls frequency conversion fan exhaust air rate and controls Electric air valve intake three part, and concrete control procedure is:
(1) signal of telecommunication conversion: condenser liquid collecting female pipe 7 internal condensation pressure is passed to condensing pressure sensor 1 by condensing pressure capillary 11, condensing pressure is converted to voltage and is greater than 0 and is less than 10V or electric current and is greater than the signal of telecommunication that 4mA is less than 20mA by condensing pressure sensor 1, the signal of telecommunication of condensing pressure sensor 1 increases along with the raising of condensing pressure, the signal of telecommunication of condensing pressure sensor 1 reduces along with the reduction of condensing pressure, and the ratio realizing condensing pressure signal and the signal of telecommunication is changed;
(2) frequency conversion fan exhaust air rate is controlled: the signal of telecommunication that step (1) is changed is flowed to PLC central controller 8 by condensing pressure holding wire 12 by condensing pressure sensor 1, PLC central controller 8 judges the condensing pressure signal of telecommunication according to programmed instruction, then by inverter control signal line 16, A.C. contactor control signal wire 17 outputs a control signal to fan frequency converter 2 and A.C. contactor 9 respectively, electric energy after frequency-conversion processing is transferred to frequency conversion fan 3 and A.C. contactor 9 above respectively by transducer power output line 13 according to the control signal of PLC central controller 8 by the fan frequency converter 2 that power supply drives, A.C. contactor 9 by the delivery of electrical energy after transducer power output line 13 just frequency-conversion processing to frequency conversion fan 3 below, thus the operating frequency of control two frequency conversion fans 3 and rotating speed increase along with the increase of step (1) switching electrical signals, the operating frequency and the rotating speed that control frequency conversion fan 3 reduce along with the reduction of step (1) switching electrical signals, and then Linear Control intake, and can setting program instruction make PLC central controller 8 control A.C. contactor 9 by A.C. contactor control signal wire 17 as required, realize reducing the low air quantity operating mode running blower fan number, meet power conservation requirement,
(3) Electric air valve intake is controlled: the signal of telecommunication that step (1) is changed is flowed to PLC central controller 8 by condensing pressure holding wire 12 by condensing pressure sensor 1, PLC central controller 8 judges the condensing pressure signal of telecommunication according to programmed instruction, then Electric air valve controller 6 is output a control signal to by Electric air valve controller control signal line 18, power frequency electric is sent to air-valve YE 4 by Electric air valve controller power stage line 14 according to the control signal of PLC central controller 8 by the Electric air valve controller 6 that power supply drives, thus control rotating and the action ratio of Electric air valve YE 4, and then the aperture controlling to be arranged on the Electric air valve valve block 5 of casing of outdoor 10 air inlet increases along with the increase of step (1) switching electrical signals, the aperture of Electric air valve valve block 5 reduces along with the reduction of step (1) switching electrical signals, realize the Linear Control of Electric air valve intake.
Claims (2)
1. the control device of an outdoor condenser cooling air quantity, it is characterized in that agent structure comprises: condensing pressure sensor, fan frequency converter, frequency conversion fan, Electric air valve YE, Electric air valve valve block, Electric air valve controller, condenser liquid collecting mother pipe, PLC central controller, A.C. contactor, casing of outdoor, condensing pressure capillary, condensing pressure holding wire, transducer power output line, Electric air valve controller power stage line, power frequency supply lines, inverter control signal line, A.C. contactor control signal wire and Electric air valve controller control signal line, condensing pressure sensor is fixed on the female pipe of condenser liquid collecting by condensing pressure capillary, and condensing pressure capillary and the female pipe of condenser liquid collecting are connected, PLC central controller is by condensing pressure holding wire, inverter control signal line, Electric air valve controller control signal line and A.C. contactor control signal wire, connect with the top-stitching of condensing pressure sensor, fan frequency converter, Electric air valve controller and A.C. contactor respectively, setting program instruction in PLC central controller, connected by transducer power output line line between fan frequency converter and frequency conversion fan above, connected by transducer power output line line between fan frequency converter and A.C. contactor, connected by transducer power output line line between A.C. contactor and frequency conversion fan below, Electric air valve valve block is arranged on the air inlet of casing of outdoor, Electric air valve controller is connected on Electric air valve YE by Electric air valve controller power stage line, mechanical linkage between Electric air valve YE and Electric air valve valve block, fan frequency converter and Electric air valve controller are connected on power frequency supply lines respectively, and power frequency supply lines connects the power supply of peripheral hardware.
2. the control device of outdoor condenser cooling air quantity according to claim 1, it is characterized in that the process realizing controlling comprises signal of telecommunication conversion, controls frequency conversion fan exhaust air rate and controls Electric air valve intake three part, concrete control procedure is:
(1) signal of telecommunication conversion: condenser liquid collecting female pipe internal condensation pressure is passed to condensing pressure sensor by condensing pressure capillary, condensing pressure is converted to voltage and is greater than 0 and is less than 10V or electric current and is greater than the signal of telecommunication that 4mA is less than 20mA by condensing pressure sensor, the signal of telecommunication of condensing pressure sensor increases along with the raising of condensing pressure, the signal of telecommunication of condensing pressure sensor reduces along with the reduction of condensing pressure, and the ratio realizing condensing pressure signal and the signal of telecommunication is changed;
(2) frequency conversion fan exhaust air rate is controlled: the signal of telecommunication that step (1) is changed is flowed to PLC central controller by condensing pressure holding wire by condensing pressure sensor, PLC central controller judges the condensing pressure signal of telecommunication according to programmed instruction, then by inverter control signal line, A.C. contactor control signal wire outputs a control signal to fan frequency converter and A.C. contactor respectively, electric energy after frequency-conversion processing is transferred to frequency conversion fan and A.C. contactor above respectively by transducer power output line according to the control signal of PLC central controller by the fan frequency converter that power supply drives, A.C. contactor by the delivery of electrical energy of transducer power output line just after frequency-conversion processing to frequency conversion fan below, thus the operating frequency of control two frequency conversion fans and rotating speed increase along with the increase of the signal of telecommunication, the operating frequency and the rotating speed that control frequency conversion fan reduce along with the reduction of the signal of telecommunication, and then Linear Control intake, and can setting program instruction make PLC central controller by A.C. contactor control signal line traffic control A.C. contactor as required, realize reducing the low air quantity operating mode running blower fan number, meet power conservation requirement,
(3) Electric air valve intake is controlled: the signal of telecommunication that step (1) is changed is flowed to PLC central controller by condensing pressure holding wire by condensing pressure sensor, PLC central controller judges the condensing pressure signal of telecommunication according to programmed instruction, then Electric air valve controller is output a control signal to by Electric air valve controller control signal line, power frequency electric is sent to air-valve YE by Electric air valve controller power stage line according to the control signal of PLC central controller by the Electric air valve controller that power supply drives, thus control rotating and the action ratio of Electric air valve YE, and then the aperture controlling to be arranged on the Electric air valve valve block of casing of outdoor air inlet increases along with the increase of the signal of telecommunication, the aperture of Electric air valve valve block reduces along with the reduction of the signal of telecommunication, realize the Linear Control of Electric air valve intake.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610134571.3A CN105546896A (en) | 2016-03-10 | 2016-03-10 | Control device for cooling air volume of outdoor condenser |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610134571.3A CN105546896A (en) | 2016-03-10 | 2016-03-10 | Control device for cooling air volume of outdoor condenser |
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| CN105546896A true CN105546896A (en) | 2016-05-04 |
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| CN201610134571.3A Pending CN105546896A (en) | 2016-03-10 | 2016-03-10 | Control device for cooling air volume of outdoor condenser |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108249164A (en) * | 2016-12-29 | 2018-07-06 | 贵州中烟工业有限责任公司 | A kind of application method of vacuum control system |
| CN108263862A (en) * | 2016-12-30 | 2018-07-10 | 贵州中烟工业有限责任公司 | A kind of stem blast system and its vacuum control system |
| CN110966813A (en) * | 2019-09-29 | 2020-04-07 | 广东申菱环境***股份有限公司 | Condensation pressure control method of air-cooled water chiller under wide temperature working condition |
| WO2020073646A1 (en) * | 2018-10-10 | 2020-04-16 | 维谛技术有限公司 | Condenser and air conditioning system |
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| US4616485A (en) * | 1985-02-14 | 1986-10-14 | Ranco Electronics Division | Temperature controller for an air conditioning apparatus |
| CN1534248A (en) * | 2003-03-31 | 2004-10-06 | 上海百富勤空调设备有限公司 | Fuzzy control method for air cooling single cooling machine set operating mode |
| CN203240832U (en) * | 2013-03-18 | 2013-10-16 | 浙江盾安机电科技有限公司 | Air-cooled condensation refrigerating unit |
| CN205403281U (en) * | 2016-03-10 | 2016-07-27 | 青岛大学 | Controlling means of outdoor condenser cooling amount of wind |
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2016
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4616485A (en) * | 1985-02-14 | 1986-10-14 | Ranco Electronics Division | Temperature controller for an air conditioning apparatus |
| CN1534248A (en) * | 2003-03-31 | 2004-10-06 | 上海百富勤空调设备有限公司 | Fuzzy control method for air cooling single cooling machine set operating mode |
| CN203240832U (en) * | 2013-03-18 | 2013-10-16 | 浙江盾安机电科技有限公司 | Air-cooled condensation refrigerating unit |
| CN205403281U (en) * | 2016-03-10 | 2016-07-27 | 青岛大学 | Controlling means of outdoor condenser cooling amount of wind |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108249164A (en) * | 2016-12-29 | 2018-07-06 | 贵州中烟工业有限责任公司 | A kind of application method of vacuum control system |
| CN108263862A (en) * | 2016-12-30 | 2018-07-10 | 贵州中烟工业有限责任公司 | A kind of stem blast system and its vacuum control system |
| WO2020073646A1 (en) * | 2018-10-10 | 2020-04-16 | 维谛技术有限公司 | Condenser and air conditioning system |
| CN110966813A (en) * | 2019-09-29 | 2020-04-07 | 广东申菱环境***股份有限公司 | Condensation pressure control method of air-cooled water chiller under wide temperature working condition |
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