CN105757890A - Control method of cooling air quantity of outdoor condenser - Google Patents
Control method of cooling air quantity of outdoor condenser Download PDFInfo
- Publication number
- CN105757890A CN105757890A CN201610134572.8A CN201610134572A CN105757890A CN 105757890 A CN105757890 A CN 105757890A CN 201610134572 A CN201610134572 A CN 201610134572A CN 105757890 A CN105757890 A CN 105757890A
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- Prior art keywords
- air valve
- condensing pressure
- electric air
- electric
- telecommunication
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
Abstract
The invention belongs to the technical field of control of cooling air quantity of refrigeration equipment and relates to a control method of cooling air quantity of an outdoor condenser. A control process comprises three parts including electric signal conversion, control of exhausting quantity of frequency conversion draught fans and control of air inlet quantity of an electric air valve, wherein condensation pressure is transmitted to a condensation pressure sensor from a condensation pressure capillary tube; the condensation pressure sensor is used for converting the condensation pressure to electric signals of voltage or current; a central PLC (Programmable Logic Controller) is used for outputting the signals to a draught fan frequency converter and an alternating-current contactor, respectively; the draught fan frequency converter is used for transmitting electric energy to the two frequency conversion draught fans according to the electric signals and controlling the working frequency and the rotary speed of the frequency conversion draught fans; an electric air valve controller is used for transmitting the electric energy to an electric performer of the electric air valve according to the electric signals and controlling forward and backward rotation and movement ratios of the electric performer of the electric air valve, so that linear control is realized; and the air inlet quantity can be automatically and linearly controlled, and the control method has the advantages of scientific control principle, simple and convenient process, high control precision, low energy consumption, long service life and reliability in controlling.
Description
Technical field:
The invention belongs to the cooling air quantity of refrigeration plant and control technical field, relate to the control method of a kind of outdoor condenser cooling air quantity, particularly a kind of method according to condensing pressure size, outdoor condenser cooling air quantity automatically controlled under the low temperature environment of outdoor pole.
Background technology:
At present, the outdoor condenser of the refrigeration plant such as industrial air-conditioning unit and freezer unit is usually the fin-tube heat exchanger with blower fan, and it is walked heat reduce condensation temperature by raising ventilating air temperature band.This heat exchange mode is in outdoor environment temperature relatively low season, heat exchange efficiency is higher, but when outdoor environment temperature is extremely low, because unit occurs that low-voltage variation affects operation on the contrary and produces, such as, under the industrial air-conditioning unit to outdoor environment heat extraction of whole year operation and freezer unit operating mode in the winter time, particularly when outdoor environment temperature processes the dew point temperature of air lower than unit, owing to outdoor inlet air temperature of condenser is too low, condensation temperature is made to be gradually lowered, so that condensing pressure reduces therewith, and condensing pressure reduction causes that evaporating pressure declines, 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, air conditioning unit service life is also impacted.
For avoiding unit that low voltage failure occurs in the winter time, in prior art, its common practice is suitably to reduce intake volume to outdoor condenser parcel canvas, or the cooling blower quantity of work is increased or reduces by installing pressure controller additional, both approaches can prevent low voltage failure to a certain extent, but when outside air temperature changes, the method of parcel canvas needs to manually adjust wrapped air-admitting surface, reach to change the purpose of cooling air quantity, person works's amount is added because not being automatically adjusted, degree of regulation is difficult to ensure that simultaneously, and blower fan still power frequency operation, waste a large amount of electric energy；Install the pressure controller method to increase and decrease blower fan number additional, fan starting and stopped process easily cause the fluctuation of condensing pressure, have impact on stablizing of evaporating temperature, and frequent start-stop easily causes service life of fan and shortens, and is unfavorable for the operation steady in a long-term of unit.Therefore, seek to design the control method of 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 to control the purpose of exhaust air rate, and reduce operation blower fan number according to actual needs, meeting low air quantity operating mode and power conservation requirement, this technical scheme there is not yet report so far.
Summary of the invention:
It is an object of the invention to the shortcoming overcoming prior art to exist, the control method of a kind of outdoor condenser cooling air quantity of design is proposed, to solve to manually adjust that air-admitting surface workload is big, low precision and the big problem of power consumption, the problem solving to adopt the condensing pressure fluctuation caused in pressure controller increase and decrease working fan quantity process, evaporating temperature unstable and service life of fan shortens.
In order to realize foregoing invention purpose, the outdoor condenser cooling air quantity that the present invention relates to controls process and includes signal of telecommunication conversion, controls frequency conversion fan exhaust air rate and control Electric air valve intake three part, and concrete control process is:
(1) signal of telecommunication conversion: condenser liquid collecting mother's pipe internal condensation pressure is transferred to condensing pressure sensor by condensing pressure capillary tube, condensing pressure sensor condensing pressure is converted to voltage more than 0 less than 10V or electric current more than the 4mA signal of telecommunication less than 20mA, 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, it is achieved the ratio of 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 pass through 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 through transducer power output lead according to the control signal of PLC central controller by the fan frequency converter that power supply drives, A.C. contactor is transferred to following frequency conversion fan by the electric energy after transducer power output lead just frequency-conversion processing；Thus controlling the operating frequency of two frequency conversion fans and rotating speed increases along with the increase of step (1) converted electrical number, the operating frequency and the rotating speed that control frequency conversion fan reduce along with the reduction of step (1) converted electrical number, and then Linear Control intake, and setting program instruction PLC central controller can be made to pass through 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；
null(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 pass through Electric air valve controller control signal line and output a control signal to Electric air valve controller，Power frequency electric energy is sent to air-valve YE by Electric air valve controller power output lead according to the control signal of PLC central controller by the Electric air valve controller that power supply drives，Thus controlling rotating and the action ratio of Electric air valve YE，And then the aperture of Electric air valve valve block controlling to be arranged on casing of outdoor air inlet increases along with the increase of step (1) converted electrical number，The aperture of Electric air valve valve block reduces along with the reduction of step (1) converted electrical number，Realize the Linear Control of Electric air valve intake.
The agent structure of the air quantity automaton that the present invention relates to includes: 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 manages, PLC central controller, A.C. contactor, casing of outdoor, condensing pressure capillary tube, condensing pressure holding wire, transducer power output lead, Electric air valve controller power output lead, 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 condenser liquid collecting mother's pipe by condensing pressure capillary tube, and condensing pressure capillary tube and condenser liquid collecting mother's pipe 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, couple 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；Coupled by transducer power output lead line between fan frequency converter and above frequency conversion fan；Coupled by transducer power output lead line between fan frequency converter and A.C. contactor, coupled by transducer power output lead line between A.C. contactor and following frequency conversion fan；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 output lead, mechanical linkage between Electric air valve YE and Electric air valve valve block, fan frequency converter and Electric air valve controller are respectively coupled on power frequency supply lines, and power frequency supply lines connects the power supply of peripheral hardware；The programmed instruction set in PLC central controller can also enroll optimization programmed instruction according to following order: when condensing pressure reduces and needs to reduce air quantity, according to reducing converter output frequency, reducing the order action successively running blower fan number, reducing Electric air valve aperture；When condensing pressure raises and needs to increase air quantity, according to increasing Electric air valve aperture, improving converter output frequency, increasing the order action successively running blower fan number, thus improving energy-saving effect.
The present invention compared with prior art, can control condenser intake, its control principle science, simple process by auto linear, and control accuracy is high, saves manpower, and energy consumption is low, failure rate is low, and the life-span is long；It is simple that it controls device structure, controls reliable, and wide accommodation controls environmental friendliness.
Accompanying drawing illustrates:
Fig. 1 is the Facad structure principle schematic of the air-conditioner outdoor unit of the present invention.
Fig. 2 is the structure principle schematic of the air-conditioner outdoor unit of the present invention.
Fig. 3 is the automatic control flow chart structural principle schematic diagram of the present invention.
Detailed description of the invention:
Below by specific embodiment and in conjunction with accompanying drawing, the invention will be further described.
Embodiment:
The outdoor condenser cooling air quantity that the present embodiment relates to controls process and includes signal of telecommunication conversion, controls frequency conversion fan exhaust air rate and control Electric air valve intake three part, and concrete control process is:
(1) signal of telecommunication conversion: condenser liquid collecting mother's pipe 7 internal condensation pressure is transferred to condensing pressure sensor 1 by condensing pressure capillary tube 11, condensing pressure sensor 1 condensing pressure is converted to voltage more than 0 less than 10V or electric current more than the 4mA signal of telecommunication less than 20mA, 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, it is achieved the ratio of condensing pressure signal and the signal of telecommunication is changed；
(4) frequency conversion fan exhaust air rate is controlled: the signal of telecommunication that step (1) is changed by condensing pressure sensor 1 flows to PLC central controller 8 by condensing pressure holding wire 12, PLC central controller 8 judges the condensing pressure signal of telecommunication according to programmed instruction, then pass through 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 through transducer power output lead 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 is transferred to following frequency conversion fan 3 by the electric energy after transducer power output lead 13 just frequency-conversion processing；Thus controlling the operating frequency of two frequency conversion fans 3 and rotating speed increases along with the increase of step (1) converted electrical number, the operating frequency and the rotating speed that control frequency conversion fan 3 reduce along with the reduction of step (1) converted electrical number, and then Linear Control intake, and setting program instruction PLC central controller 8 can be made to 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；
null(3) Electric air valve intake is controlled: the signal of telecommunication that step (1) is changed by condensing pressure sensor 1 flows to PLC central controller 8 by condensing pressure holding wire 12，PLC central controller 8 judges the condensing pressure signal of telecommunication according to programmed instruction，Then pass through Electric air valve controller control signal line 18 and output a control signal to Electric air valve controller 6，Power frequency electric energy is sent to air-valve YE 4 by Electric air valve controller power output lead 14 according to the control signal of PLC central controller 8 by the Electric air valve controller 6 that power supply drives，Thus controlling rotating and the action ratio of Electric air valve YE 4，And then the aperture of Electric air valve valve block 5 controlling to be arranged on casing of outdoor 10 air inlet increases along with the increase of step (1) converted electrical number，The aperture of Electric air valve valve block 5 reduces along with the reduction of step (1) converted electrical number，Realize the Linear Control of Electric air valve intake.
The agent structure of the air quantity automaton that the present embodiment relates to includes: 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, condenser liquid collecting mother's pipe 7, PLC central controller 8, A.C. contactor 9, casing of outdoor 10, condensing pressure capillary tube 11, condensing pressure holding wire 12, transducer power output lead 13, Electric air valve controller power output lead 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 condenser liquid collecting mother's pipe 7 by condensing pressure capillary tube 11, and condensing pressure capillary tube 11 and condenser liquid collecting mother's pipe 7 are connected；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, couple 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；Coupled by transducer power output lead 13 line between fan frequency converter 2 and above frequency conversion fan 3；Coupled by transducer power output lead 13 line between fan frequency converter 2 and A.C. contactor 9, coupled by transducer power output lead 13 line between A.C. contactor 9 and following frequency conversion fan 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 output lead 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 respectively coupled on power frequency supply lines 15, and power frequency supply lines 15 connects the power supply of peripheral hardware.
In the present embodiment, the programmed instruction set in PLC central controller 8 can also enroll optimization programmed instruction according to following order: when condensing pressure reduces and needs to reduce air quantity, according to reducing converter output frequency, reducing the order action successively running blower fan number, reducing Electric air valve aperture；When condensing pressure raises and needs to increase air quantity, according to increasing Electric air valve aperture, improving converter output frequency, increasing the order action successively running blower fan number, thus improving energy-saving effect.
Claims (2)
1. the control method of an outdoor condenser cooling air quantity, it is characterized in that control method realizes in air quantity automaton, control process includes signal of telecommunication conversion, controls frequency conversion fan exhaust air rate and control Electric air valve intake three part, and concrete control process is:
(1) signal of telecommunication conversion: condenser liquid collecting mother's pipe internal condensation pressure is transferred to condensing pressure sensor by condensing pressure capillary tube, condensing pressure sensor condensing pressure is converted to voltage more than 0 less than 10V or electric current more than the 4mA signal of telecommunication less than 20mA, 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, it is achieved the ratio of 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 pass through 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 through transducer power output lead according to the control signal of PLC central controller by the fan frequency converter that power supply drives, A.C. contactor is transferred to following frequency conversion fan by the electric energy after transducer power output lead just frequency-conversion processing；Thus controlling the operating frequency of two frequency conversion fans and rotating speed increases 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 setting program instruction PLC central controller can be made to pass through 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；
null(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 pass through Electric air valve controller control signal line and output a control signal to Electric air valve controller，Power frequency electric energy is sent to air-valve YE by Electric air valve controller power output lead according to the control signal of PLC central controller by the Electric air valve controller that power supply drives，Thus controlling rotating and the action ratio of Electric air valve YE，And then the aperture of Electric air valve valve block controlling to be arranged on 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.
2. the control method of outdoor condenser cooling air quantity according to claim 1, it is characterized in that the agent structure of described air quantity automaton includes: 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 manages, PLC central controller, A.C. contactor, casing of outdoor, condensing pressure capillary tube, condensing pressure holding wire, transducer power output lead, Electric air valve controller power output lead, 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 condenser liquid collecting mother's pipe by condensing pressure capillary tube, and condensing pressure capillary tube and condenser liquid collecting mother's pipe 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, couple 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；Coupled by transducer power output lead line between fan frequency converter and above frequency conversion fan；Coupled by transducer power output lead line between fan frequency converter and A.C. contactor, coupled by transducer power output lead line between A.C. contactor and following frequency conversion fan；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 output lead, mechanical linkage between Electric air valve YE and Electric air valve valve block, fan frequency converter and Electric air valve controller are respectively coupled on power frequency supply lines, and power frequency supply lines connects the power supply of peripheral hardware.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610134572.8A CN105757890A (en) | 2016-03-10 | 2016-03-10 | Control method of cooling air quantity of outdoor condenser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610134572.8A CN105757890A (en) | 2016-03-10 | 2016-03-10 | Control method of cooling air quantity of outdoor condenser |
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| CN105757890A true CN105757890A (en) | 2016-07-13 |
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| CN201610134572.8A Pending CN105757890A (en) | 2016-03-10 | 2016-03-10 | Control method of cooling air quantity of outdoor condenser |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106524330A (en) * | 2016-12-06 | 2017-03-22 | 珠海格力电器股份有限公司 | Air conditioner outdoor unit, air conditioning unit and refrigeration control method and heating control method thereof |
| CN109708266A (en) * | 2018-12-29 | 2019-05-03 | 广东美的暖通设备有限公司 | Air-valve control method and air-conditioning system |
| WO2020073646A1 (en) * | 2018-10-10 | 2020-04-16 | 维谛技术有限公司 | Condenser and air conditioning system |
| WO2020133927A1 (en) * | 2018-12-29 | 2020-07-02 | 合肥美的暖通设备有限公司 | Method and device for controlling low-temperature refrigeration air valve |
| CN116826577A (en) * | 2023-08-29 | 2023-09-29 | 川开电气有限公司 | Prefabricated cabin ventilation and heat dissipation control method |
-
2016
- 2016-03-10 CN CN201610134572.8A patent/CN105757890A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106524330A (en) * | 2016-12-06 | 2017-03-22 | 珠海格力电器股份有限公司 | Air conditioner outdoor unit, air conditioning unit and refrigeration control method and heating control method thereof |
| WO2020073646A1 (en) * | 2018-10-10 | 2020-04-16 | 维谛技术有限公司 | Condenser and air conditioning system |
| CN109708266A (en) * | 2018-12-29 | 2019-05-03 | 广东美的暖通设备有限公司 | Air-valve control method and air-conditioning system |
| WO2020133927A1 (en) * | 2018-12-29 | 2020-07-02 | 合肥美的暖通设备有限公司 | Method and device for controlling low-temperature refrigeration air valve |
| CN116826577A (en) * | 2023-08-29 | 2023-09-29 | 川开电气有限公司 | Prefabricated cabin ventilation and heat dissipation control method |
| CN116826577B (en) * | 2023-08-29 | 2023-11-14 | 川开电气有限公司 | Prefabricated cabin ventilation and heat dissipation control method |
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Application publication date: 20160713 |
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