CN105605774A - Heat-pump hot water heater electronic expansion valve control system - Google Patents
Heat-pump hot water heater electronic expansion valve control system Download PDFInfo
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- CN105605774A CN105605774A CN201610139541.1A CN201610139541A CN105605774A CN 105605774 A CN105605774 A CN 105605774A CN 201610139541 A CN201610139541 A CN 201610139541A CN 105605774 A CN105605774 A CN 105605774A
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- Prior art keywords
- temperature
- expansion valve
- heat
- environment temperature
- controller
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H4/00—Fluid heaters characterised by the use of heat pumps
- F24H4/02—Water heaters
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/20—Arrangement or mounting of control or safety devices
- F24H9/2007—Arrangement or mounting of control or safety devices for water heaters
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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
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
-
- 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
- F25B2600/25—Control of valves
- F25B2600/2513—Expansion valves
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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
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/21—Temperatures
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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
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/21—Temperatures
- F25B2700/2106—Temperatures of fresh outdoor air
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Heat-Pump Type And Storage Water Heaters (AREA)
Abstract
The invention discloses a heat-pump hot water heater electronic expansion valve control system. The system comprises an acquisition unit, a controller and an execution unit, wherein the acquisition unit is used for acquiring the input water temperature and the environment temperature of a heat-pump hot water heater; the controller receives the input water temperature and the environment temperature received by a heat-pump hot water heater controller and determines an opening value according to the input water temperature and the environment temperature; the execution unit controls the opening of an expansion valve according to the opening value.
Description
Technical field
The present invention relates to field of intelligent control, be specifically related to a kind of electronics that improves heat pump water-heating machine efficiencyExpansion valve control system.
Background technology
Along with the accreditation gradually in market, air-source heat pump hot water has obtained unprecedentedly promoting widely, entersThe operational efficiency that one step improves heat pump water-heating machine is the important research content of art of heat pumps. At heat pumpIn, throttling arrangement is that wherein very important parts form, the throttling dress in traditional heat pump water-heating machinePut employing heating power expansion valve, but because Teat pump boiler all needs operation particularly in the north throughout the year, the summerIt environment temperature reaches more than 35 DEG C, winter environment temperature be low to moderate again subzero below 15 DEG C, working conditions changeVery large, because structure and the principle of heating power expansion valve are limit, when design coupling, cannot take into account height simultaneouslyTemperature operating mode and worst cold case, and the mechanical structure of heating power expansion valve is for the ripple of heat pump water-heating machine systemMoving slow in reacting, cause and enter the refrigerant flow of evaporimeter improper, to the heating capacity of unitThere is negative impact with system security of operation.
Mostly adopt degree of superheat control---unit for the control logic of electric expansion valve in the marketA default degree of superheat (t), then arranges that at compressor air suction mouth a sensor (t1) serves as suctionTemperature degree, evaporator arranges that a sensor (t2) serves as evaporating temperature, its operation principle is:The difference of judgement (t1-t2) and t, in the time that the value of (t1-t2) is greater than t, unit evaporator refrigerant streamAmount not, open greatly by logic control electric expansion valve, increases evaporator refrigerant flow; As (t1-t2)When value is less than t, unit evaporator refrigerant flow is too much, and logic control electric expansion valve is opened little, subtractsLittle evaporator refrigerant flow keeps the aperture of unit expansion valve to be controlled in t=(t1-t2) always,Thereby control required evaporator refrigerant flow, but find in experiment, this control logic is pastToward not reaching heating capacity and the heating efficiency of expectation, thereby described (t2) temperature is served as to evaporation temperatureDegree is irrational, and itself and actual evaporation temperature have difference, and different unit difference is different, causesAll the time this electronic expansion valve controls system cannot reach the unit capacity of expectation, so can reduce wholeThe efficiency of water-heating machine system.
Summary of the invention
Therefore, the technical problem to be solved in the present invention is existing heat pump water-heating machine electronic expansion valve controlsSystem can reduce the defect of heat pump water-heating machine operation operating efficiency.
In view of this, a kind of heat pump water-heating machine electronic expansion valve controls system provided by the invention, comprising:Collecting unit, controller and performance element; Wherein, described collecting unit is used for obtaining described Heat PumpThe inflow temperature of hydrophone and environment temperature; Described controller receives described heat-pump hot-water machine controller and receivesDescribed inflow temperature and environment temperature, and determine and open according to described inflow temperature and described environment temperatureDegree value; Described performance element is according to the aperture of described opening value control electric expansion valve.
Further, described controller receives and records described collecting unit and collects according to predetermined periodInflow temperature and environment temperature, every mean value through a n computation of Period n inflow temperatureThe mean value RT1 of a RT3 and n environment temperature, wherein n >=2, and determine aperture according to RT3 and RT1Value.
Further, described controller is by described inflow temperature and at least one default inflow temperature threshold valueCompare, and described environment temperature and at least one default environment temperature threshold value are compared, rootDetermine opening value according to comparison result.
Further, described default inflow temperature threshold value and described default environment temperature threshold value all have multiple,And multiple default inflow temperature threshold values can be divided multiple inflow temperature scopes, multiple default environment temperature thresholdsValue can be divided multiple ambient temperature ranges; Described controller is according to the residing water inlet temperature of described inflow temperatureDegree scope and the residing ambient temperature range of described environment temperature, determine opening value.
Further, described controller is heat-pump hot-water machine controller, described heat-pump hot-water machine controllerBe provided with aperture signal COM1, described heat-pump hot-water machine controller generates according to definite opening valuePulse signal, and send described pulse signal by described aperture signal COM1.
Further, described performance element comprises communication coil, described in described communication coil is used for receivingPulse signal, and make described electronics swollen according to described pulse signal to described electric expansion valve release magnetic fieldSwollen valve events.
Further, described collecting unit comprises the first temperature sensor and the second temperature sensor, instituteState water inlet place that the first temperature sensor is arranged on water circulating pump, described the second temperature sensor is arranged onEvaporator fin side.
A kind of heat pump water-heating machine electronic expansion valve controls system provided by the invention, utilizes collecting unit to obtainInflow temperature and the environment temperature of getting described Teat pump boiler, controller receives described inflow temperature and ringBorder temperature, and determine electronic expansion valve opening value according to described inflow temperature and environment temperature, control thenPerformance element processed, according to the aperture of described opening value control electric expansion valve, has solved by compressor air suctionThe suction temperature of mouth and the evaporating temperature of evaporator, as temperature acquisition position, make existing Heat PumpThe defect that water machine operational efficiency reduces
Brief description of the drawings
For content of the present invention is more likely to be clearly understood, below according to concrete reality of the present inventionExecute example also by reference to the accompanying drawings, the present invention is further detailed explanation, wherein
Fig. 1 is a kind of heat pump water-heating machine electronic expansion valve controls system architecture that the embodiment of the present invention providesSchematic diagram;
Fig. 2 is a kind of heat pump water-heating machine system structural representation that the embodiment of the present invention provides.
Detailed description of the invention
A kind of heat pump water-heating machine electronic expansion valve controls system that the present embodiment provides, as shown in Figure 1,This system comprises collecting unit 11, controller 12, performance element 13.
Wherein, collecting unit 11, for obtaining inflow temperature and the environment temperature of Teat pump boiler, is controlledDevice 12 receives described inflow temperature and the environment temperature that described controller of heat pump water heater receives, and according toDescribed inflow temperature and environment temperature are determined opening value, and performance element 13 is according to described opening value control electricityThe aperture of sub-expansion valve.
Fig. 2 shows a kind of heat pump water-heating machine system structural representation, particularly, and described collecting unit 11Comprise the first temperature sensor 55 and the second temperature sensor 56, described the first temperature sensor is used for adoptingCollection inflow temperature, described the second temperature sensor is used for gathering environment temperature, preferably, described firstTemperature sensor is arranged on water inlet place of water circulating pump, and described the second temperature sensor is arranged on fin and steamsHair device side, described controller 12 can be controller of heat pump water heater 54 or be integrated in described heatMonolithic processor control device on pump water heater throttling arrangement, the preferred controller of heat pump water heater of the present embodiment54, as shown in Figure 2, described performance element 13 is electric expansion valve 51, and compressor 4 evaporates from finIn device 8, suck the gaseous refrigerant of low-temp low-pressure, compressor 4 is provided with low pressure voltage operated device 11 Hes simultaneouslyHigh pressure voltage operated device 12, is done work refrigerant compression is become to high temperature and high pressure gas by compressor 4, high temperatureHigher pressure refrigerant gas enters tube-in-tube condenser 3 after four-way change-over valve 09 commutation, and by circulatingThe water of the attemperater 1 that water pump 2 recycles carries out high efficiency counter-flow heat exchange. The first TEMP 55Be arranged on water inlet place of water circulating pump 2, the refrigerant gas of HTHP is in tube-in-tube condenser 3Be condensed into the refrigerant liquid of normal temperature high voltage and emit amount of heat, the water of attemperater 1 absorbs systemCryogen liberated heat constantly rises self temperature, externally provides required hot water, then normal temperature high voltageLiquid refrigerant flow through after reservoir 5, filter 6 and enter throttling arrangement 57, pass through heat-pump hot-waterMachine controller 54 sends pulse signal via aperture signal COM1 53, is received by communication coil 52Pulse signal, and discharge magnetic field according to described pulse signal to described electric expansion valve 51 and make described electronicsExpansion valve 51 moves, and enters evaporator fin 8 and steam at fin after electric expansion valve 51 reducing pressure by regulating flowsIn hair device 8, absorb heat in surrounding air, the second temperature sensor 56 is arranged on evaporator fin 8 sidesFace collecting temperature, the preferred air-source of the present embodiment is thermal source, advertises airborne heat by fan 7,Make cold-producing medium flash to the gas of low-temp low-pressure, then flow to again after four-way change-over valve 09 commutates and enter gasLiquid/gas separator 10 carries out gas-liquid separation, is finally inhaled into compression in compressor 4, so iterative cycles,Thereby make Teat pump boiler hot water preparing.
By verification experimental verification, the heat pump water-heating machine electronic expansion valve controls system that the embodiment of the present invention provides,Gather inflow temperature and ambient temperature data by collecting unit, and draw electronics by controller with this temperatureThe opening value of expansion valve, finally, by performance element control electronic expansion valve opening, compares by compressor and inhalesThe suction temperature of gas port and the evaporating temperature of evaporator are as temperature acquisition position, the present embodiment sideCase has been optimized control mode and has been improved the efficiency of heat pump water-heating machine, meanwhile, adopts two TEMPsDevice gathers heat pump water-heating machine temperature and is convenient to test, reduced the test period, has simplified controllerControl logic has ensured control accuracy simultaneously.
Preferably, described controller of heat pump water heater is adopted described in can receiving and record according to predetermined periodInflow temperature and environment temperature that collection unit collects, every through n water inlet of n computation of PeriodThe mean value RT3 of temperature and the mean value RT1 of n environment temperature, wherein n >=2, and according to RT3Determine opening value with RT1.
Particularly, record and verify through test, described controller of heat pump water heater is every through 4 cyclesCalculate 4 inflow temperature mean value RT3 and 4 environment temperature mean value RT1, wherein each weeksPreferred 5s of time phase, the every 5s of temperature sensor gathers, record one secondary data, obtains 4 temperature valuesAfter mean value, feed back to electronic expansion valve opening described in the control of described heat-pump hot-water machine controller.
The optimum electronic expansion under different inflow temperatures and environment temperature being recorded by test of many timesThe aperture data of valve write electronic expansion valve opening and regulate master meter, as shown in table 1, can find out instituteState default inflow temperature threshold value and described default environment temperature threshold value all have multiple, and multiple default water inletTemperature threshold can be divided multiple inflow temperature scopes, and multiple default environment temperature threshold values can be divided multiple ringsBorder temperature range, compares described inflow temperature and at least one default inflow temperature threshold value, andDescribed environment temperature and at least one default environment temperature threshold value are compared, controller according to described inThe residing inflow temperature scope of inflow temperature and the residing ambient temperature range of described environment temperature, reallyDetermine opening value, write electronic expansion valve opening and regulate in master meter, described electric expansion valve is opened simultaneouslyDegree regulates master meter logic to write in the control program of controller of heat pump water heater, and performance element is provided with logicalNews coil, heat-pump hot-water machine controller is provided with aperture signal COM1, heat-pump hot-water machine controllerAccording to definite opening value production burst signal, and described in sending by described aperture signal COM1Pulse signal, described communication coil return pulse signal, and according to described pulse signal to described electronicsExpansion valve discharges magnetic field makes described electronic expansion valve events, controls thus the aperture of electric expansion valve, exampleAs described in gathering as worked as, inflow temperature value RT3 is 37 DEG C, and RT3 is 35≤RT3≤40 model in temperatureIn enclosing, described ambient temperature value RT1 is 12 DEG C, and affiliated temperature range is 10≤RT1≤14 o'clock,With reference to table 1, the aperture that draws corresponding electric expansion valve is 170 steps, now electronic control valve byThe control command that its inner stepper motor sends according to controller of heat pump water heater is adjusted electric expansion valveStep number, reach corresponding aperture.
The control mode of electric expansion valve in above-mentioned heat pump water-heating machine electronic expansion valve controls system, through examinationChecking, can reduce electric expansion valve stepping opening value and obtain change frequency, reduce Teat pump boiler systemUnite each device motion wearing and tearing and to control result accurate, improve heat pump water-heating machine efficiency.
Table 1 electronic expansion valve opening regulates master meter
Obviously, above-described embodiment is only for example is clearly described, and not to the side of enforcementThe restriction of formula. For those of ordinary skill in the field, also can on the basis of the above descriptionTo make other changes in different forms. Here without also giving all embodimentsWith exhaustive. And the apparent variation of being extended out thus or the still guarantor in the invention of variationProtect among scope.
Claims (7)
1. a heat pump water-heating machine electronic expansion valve controls system, is characterized in that, comprising: gatherUnit, controller and performance element;
Wherein, described collecting unit is for obtaining inflow temperature and the environment temperature of described Teat pump boiler;
Described controller receives described inflow temperature and the environment temperature that described heat-pump hot-water machine controller receivesDegree, and determine opening value according to described inflow temperature and described environment temperature;
Described performance element is according to the aperture of described opening value control electric expansion valve.
2. system according to claim 1, is characterized in that, described controller is according to default weekPhase receives and records inflow temperature and the environment temperature that described collecting unit collects, every through n weekPhase is calculated the mean value RT3 of a n inflow temperature and the mean value RT1 of n environment temperature, whereinN >=2, and determine opening value according to RT3 and RT1.
3. system according to claim 2, is characterized in that, described controller is by described water inletTemperature and at least one default inflow temperature threshold value are compared, and by described environment temperature and at least oneIndividual default environment temperature threshold value is compared, and determines opening value according to comparison result.
4. system according to claim 3, is characterized in that, described default inflow temperature threshold valueAll have multiplely with described default environment temperature threshold value, and multiple default inflow temperature threshold value can be divided multipleInflow temperature scope, multiple default environment temperature threshold values can be divided multiple ambient temperature ranges; Described controlDevice processed is according to the residing inflow temperature scope of described inflow temperature and the residing environment of described environment temperatureTemperature range, determines opening value.
5. according to the system described in any one in claim 1-4, it is characterized in that described controllerFor heat-pump hot-water machine controller, described heat-pump hot-water machine controller is provided with aperture signal COM1,Described heat-pump hot-water machine controller is according to definite opening value production burst signal, and by described apertureSignal COM1 sends described pulse signal.
6. system according to claim 5, is characterized in that, described performance element comprises communicationCoil, described communication coil is used for receiving described pulse signal, and according to described pulse signal to describedElectric expansion valve discharges magnetic field makes described electronic expansion valve events.
7. system according to claim 1, is characterized in that, described collecting unit comprises firstTemperature sensor and the second temperature sensor, described the first temperature sensor is arranged on entering of water circulating pumpWater place, described the second temperature sensor is arranged on evaporator fin side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610139541.1A CN105605774A (en) | 2016-03-11 | 2016-03-11 | Heat-pump hot water heater electronic expansion valve control system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610139541.1A CN105605774A (en) | 2016-03-11 | 2016-03-11 | Heat-pump hot water heater electronic expansion valve control system |
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| CN201610139541.1A Pending CN105605774A (en) | 2016-03-11 | 2016-03-11 | Heat-pump hot water heater electronic expansion valve control system |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106642854A (en) * | 2016-09-12 | 2017-05-10 | 珠海格力电器股份有限公司 | Electronic expansion valve opening dividing method, adjusting method and system and water chilling unit |
| CN107388623A (en) * | 2017-08-30 | 2017-11-24 | 合肥美的暖通设备有限公司 | Control method, control system and the heat pump of electric expansion valve |
| CN112303965A (en) * | 2019-07-26 | 2021-02-02 | 株式会社鹭宫制作所 | Cooling device |
| CN112944742A (en) * | 2019-12-09 | 2021-06-11 | 杭州三花研究院有限公司 | Opening degree control system and control method of electronic expansion valve |
| CN113758017A (en) * | 2021-09-03 | 2021-12-07 | 广东纽恩泰新能源科技发展有限公司 | Initial opening degree calculation method, device, equipment and medium for electronic expansion valve |
| CN115507562A (en) * | 2022-11-24 | 2022-12-23 | 广东美格动力新能源有限公司 | Heat pump unit water pump control method and heat pump unit |
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| US20140260379A1 (en) * | 2013-03-15 | 2014-09-18 | Energy Recovery Systems Inc. | Expansion valve control for heat transfer system |
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| CN205448298U (en) * | 2016-03-11 | 2016-08-10 | 浙江正理生能科技有限公司 | Heat pump water heater electronic expansion valve control system |
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| CN1403746A (en) * | 2001-09-04 | 2003-03-19 | 三洋电机株式会社 | Heat pump type hot water supply device |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106642854A (en) * | 2016-09-12 | 2017-05-10 | 珠海格力电器股份有限公司 | Electronic expansion valve opening dividing method, adjusting method and system and water chilling unit |
| CN106642854B (en) * | 2016-09-12 | 2019-04-02 | 珠海格力电器股份有限公司 | Electronic expansion valve opening dividing method, adjusting method and system and water chilling unit |
| CN107388623A (en) * | 2017-08-30 | 2017-11-24 | 合肥美的暖通设备有限公司 | Control method, control system and the heat pump of electric expansion valve |
| CN112303965A (en) * | 2019-07-26 | 2021-02-02 | 株式会社鹭宫制作所 | Cooling device |
| CN112944742A (en) * | 2019-12-09 | 2021-06-11 | 杭州三花研究院有限公司 | Opening degree control system and control method of electronic expansion valve |
| CN113758017A (en) * | 2021-09-03 | 2021-12-07 | 广东纽恩泰新能源科技发展有限公司 | Initial opening degree calculation method, device, equipment and medium for electronic expansion valve |
| CN115507562A (en) * | 2022-11-24 | 2022-12-23 | 广东美格动力新能源有限公司 | Heat pump unit water pump control method and heat pump unit |
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