CN105865096A - Method and unit for improving heating effect of multi-connected machine set - Google Patents
Method and unit for improving heating effect of multi-connected machine set Download PDFInfo
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- CN105865096A CN105865096A CN201610280572.9A CN201610280572A CN105865096A CN 105865096 A CN105865096 A CN 105865096A CN 201610280572 A CN201610280572 A CN 201610280572A CN 105865096 A CN105865096 A CN 105865096A
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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
- F25B41/00—Fluid-circulation arrangements
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
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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
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
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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
- 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
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/31—Expansion valves
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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
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/65—Electronic processing for selecting an operating mode
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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
- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Thermal Sciences (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Signal Processing (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses a method and unit for improving the heating effect of a multi-connected machine set. The method comprises the steps that part of indoor units in the indoor machine set (5) conducts heating, part of indoor units are shut down, and the operating time is t1; a temperature value Ti of a heating outlet of each heating indoor unit and the opening degree PMVi of an indoor unit electronic expansion valve (6) of the heating indoor unit are detected, and the average temperature value T1av of the heating outlets of the heating indoor units is calculated; a modified average temperature value T2av of the heating outlets of the heating indoor units and a modified opening degree average value PMVav of the indoor unit electronic expansion valves (6) are obtained; a saturated temperature value Tt of an outdoor heat exchanger (3) is obtained, and the opening degree PMVof an outdoor unit electronic expansion valve (4) is detected; and a coolant excessiveness condition of the heating indoor units is set, if the condition is met, the opening degree of the indoor unit electronic expansion valves (6) of the indoor units shut down is reduced, detection and calculation are repeated, and the procedures are compared. The method and unit for improving the heating effect of the multi-connected machine set have the advantages that the heating effect is ensured, and required energy consumption is low.
Description
Technical field
The present invention relates to a kind of method promoting multi-connected machine unit heating effect and unit thereof.
Background technology
Air-conditioning, as the own part through becoming people's life of refrigeration or heating equipment, improves the comfortableness of people's life, but the operation of air-conditioning needs to expend more electric energy.The cycle of the operation of air-conditioning is the longest, and generally operation is no problem in 10 years.At present, the multi-gang air-conditioner on market, particularly when heating, for coolant Biased flow phenomenon, have employed new technical scheme, thus can improve the heating effect of system.
Chinese patent such as Application No. CN201110255060.4, patent name is: the control method of preventing bias flow of refrigerants during heating of multi-connected air conditioning unit, this disclosure of the invention is known clearly the control method of a kind of preventing bias flow of refrigerants during heating of multi-connected air conditioning unit, its realization mainly comprises the following steps: measure temperature T0 in the middle part of indoor heat exchanger, indoor-unit cooling-medium the highest for TO is most, and indoor-unit cooling-medium minimum for TO is minimum；Measure outlet temperature Tlmin of the indoor heat exchanger of the minimum indoor set of coolant, measure outlet temperature Tlmax of the indoor heat exchanger of the most indoor set of coolant, calculate both difference △ T；Judge that △ T, whether more than or equal to 5, is then the aperture of the interior organic electronic expansion valve of indoor set minimum for coolant to be increased, the aperture of the interior organic electronic expansion valve of indoor sets most for coolant is reduced；At set intervals, repeat the above steps, until shutting down.
But above-mentioned technical scheme simply the most simply by indoor set less for the refrigerant return of more for coolant indoor set to coolant, improves the heating effect of system, this technical scheme cannot solve following situation problem out；In VRF Air Conditioning System, when part indoor set is under the state of heating, and part indoor set is in stopped status, if the coolant being in the indoor set heated is too much, causing coolant to pile up, affect heat transfer effect, the heating effect causing unit overall is the best.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of method promoting multi-connected machine unit heating effect, and the method is it can be avoided that the coolant of the indoor set heated is too much, thus realizes preferable heating effect.
For solving above-mentioned technical problem, the technical scheme that the present invention provides is: a kind of method that in multi-connected machine, machine promotes heating effect, it includes compressor, cross valve, outdoor heat exchange machine, off-premises station electric expansion valve and the indoor units of parallel connection, and the outfan of the indoor set of described indoor units is provided with electronic expansion valve of indoor unit；The outfan of described compressor is connected by the input of cross valve with indoor units in parallel, the input of the outfan of the indoor units of described parallel connection, off-premises station electric expansion valve, outdoor heat exchange machine, cross valve and compressor is sequentially connected with, in order to realize refrigerant circulation；
Step one: the part indoor set in indoor units is in heating mode, part indoor set is in shutdown mode, runs the t1 time；
Step 2: detect each temperature value Ti heating exit heating indoor set and this heats aperture PMVi of electronic expansion valve of indoor unit of indoor set, calculate the average temperature value T1av heating exit heating indoor set；
Step 3: obtain the average temperature value T2av heating exit heating indoor set through revising and aperture average value P MVav of revised electronic expansion valve of indoor unit；
Step 4: obtain saturation temperature value Tt of outdoor heat exchange machine, aperture PMV of organic electronic expansion valve outside sensing chamber；
Step 5: set and heat the condition that the coolant of indoor set is too much, if the aperture of saturation temperature value Tt and the difference of average temperature value T2av, aperture average value P MVav and off-premises station electric expansion valve meets heats the condition that the coolant of indoor set is too much, then enter step 6, otherwise redirect seven；
Step 6: reduce the aperture of the electronic expansion valve of indoor unit shutting down indoor set, jump to step 2；
Step 7: maintain the aperture of the electronic expansion valve of indoor unit shutting down indoor set after reducing.
In step 4, according to reducing the 1% of electronic expansion valve of indoor unit maximum opening every t2S.
As improvement, t2 is 20-40S.
As improvement, obtain and specifically refer to each temperature value Ti heating exit heating indoor set detected is done with average temperature value Tav difference calculating respectively through the average temperature value T2av heating exit heating indoor set revised, if both differences are more than 5, then reject aperture PMVi of this temperature value Ti and correspondence thereof, again remaining temperature value Ti and aperture PMVi are averaging calculating, obtain heating the average temperature value T2av heating exit of indoor set and aperture average value P MVav of electronic expansion valve of indoor unit；
As improvement, set and heat the condition that the coolant of indoor set is too much, if saturation temperature value Tt and the difference of average temperature value T2av, aperture average value P MVav and off-premises station electric expansion valve meet and heat the condition that the coolant of indoor set is too much, then enter step 6, otherwise redirect seven, if specifically referring to meet the saturation temperature value Tt difference with average temperature value T2av more than 8 degrees Celsius, and aperture average value P MVav of electronic expansion valve of indoor unit more than electronic expansion valve of indoor unit maximum opening 80%, or meet the 20% of aperture PMV of the off-premises station electric expansion valve maximum opening less than off-premises station electric expansion valve, meet any one condition, then enter step 6, otherwise redirect seven.
As improvement, in step 4, the aperture reduced can be added up, and judge whether the aperture of the accumulative electronic expansion valve of indoor unit reduced is more than the 30% of the maximum opening of electronic expansion valve of indoor unit, if more than jumping to step 7, otherwise jump procedure two.
As improvement, in step 4, by detecting the high-pressure P of compressor operating, finding out and saturation temperature value Tt corresponding to this high-pressure P, this saturation temperature value Tt is saturation temperature value Tt of outdoor heat exchange machine.
As improvement, t1 is 10-20 minute.
After using above method, the present invention is compared with prior art, have the advantage that and heat aperture PMVi of electronic expansion valve of indoor unit of indoor set by detecting each temperature value Ti heating exit heating indoor set and this, calculate the average temperature value T1av heating exit heating indoor set；Obtain the average temperature value T2av heating exit heating indoor set through revising and aperture average value P MVav of revised electronic expansion valve of indoor unit；Obtain saturation temperature value Tt of outdoor heat exchange machine, aperture PMV of organic electronic expansion valve outside sensing chamber；Reset and heat the condition that the coolant of indoor set is too much; if saturation temperature value Tt and the difference of average temperature value T2av, aperture average value P MVav and off-premises station electric expansion valve meet heats the condition that the coolant of indoor set is too much; if meeting, reduce the aperture of the electronic expansion valve of indoor unit shutting down indoor set; starting above-mentioned circulation, until being unsatisfactory for, maintaining the aperture of the electronic expansion valve of indoor unit shutting down indoor set after reduction.Due in cyclic process; system coolant total amount is certain; no matter coolant enters into is to shut down or the coolant quantity in the indoor set heated is it is believed that consistent; by constantly reducing the coolant discharge of the indoor set shut down; realize the effect of the indoor set storage coolant shut down; owing to part coolant is stored in the indoor set shut down; thus avoid the coolant of indoor set heated too much; go to understand to be exactly that coolant is stored in the indoor set shut down more bluntly; the coolant avoiding the indoor set heated is piled up, thus can realize preferable heating effect.
The technical problem to be solved in the present invention is to provide a kind of unit promoting multi-connected machine unit heating effect, and this unit is it can be avoided that the coolant of the indoor set heated is too much, thus realizes preferable heating effect.
For solving above-mentioned technical problem, the technical scheme that the present invention provides is: it includes compressor, cross valve, outdoor heat exchange machine, off-premises station electric expansion valve and the indoor units of parallel connection, and the outfan of the indoor set of described indoor units is provided with electronic expansion valve of indoor unit；The outfan of described compressor is connected by the input of cross valve with indoor units in parallel, the input of the outfan of the indoor units of described parallel connection, off-premises station electric expansion valve, outdoor heat exchange machine, cross valve and compressor is sequentially connected with, in order to realize refrigerant circulation；It also include the high-pressure P for detecting compressor operating pressure transducer, be located at the temperature sensor at the air outlet of indoor set, outside sensing chamber the first detection device of the aperture of organic electronic expansion valve, for the second detection device of electronic expansion valve of indoor unit and control the controller of aperture of electronic expansion valve of indoor unit；The input of described controller electrically connects with pressure transducer, temperature sensor, the first detection device and second detection device respectively, and the outfan of described controller electrically connects with electronic expansion valve of indoor unit.
After using above structure, the present invention compared with prior art, has the advantage that this unit, by constantly reducing the coolant discharge of the indoor set shut down, is avoided the coolant of indoor set heated too much, thus realized preferable heating effect.
Accompanying drawing explanation
Fig. 1 is the overall structure schematic diagram of the present invention.
Fig. 2 is the overall structure schematic diagram of the unit of the present invention.
Fig. 3 is the circuit structure block diagram of the present invention.
Shown in figure: 1, compressor, 2, cross valve, 3, outdoor heat exchange machine, 4, off-premises station electric expansion valve, 5, indoor units, 6, electronic expansion valve of indoor unit, 7, pressure transducer, 8, temperature sensor, 901, the first detection device, 902, second detection device, 10, controller.
Detailed description of the invention
The present invention is described in further detail below in conjunction with the accompanying drawings.
As shown in accompanying drawing 1, accompanying drawing 2 and accompanying drawing 3, a kind of method promoting multi-connected machine unit heating effect of the present invention, it includes the indoor units 5 of compressor 1, cross valve 2, outdoor heat exchange machine 3, off-premises station electric expansion valve 4 and parallel connection, and the outfan of the indoor set of described indoor units 5 is provided with electronic expansion valve of indoor unit 6；The outfan of described compressor 1 is connected by the input of cross valve 2 with indoor units 5 in parallel, the input of the outfan of indoor units 5 of described parallel connection, off-premises station electric expansion valve 4, outdoor heat exchange machine 3, cross valve 2 and compressor 1 is sequentially connected with, in order to realize refrigerant circulation；Step one: the part indoor set in indoor units 5 is in heating mode, part indoor set is in shutdown mode, runs the t1 time, and the aperture of the electronic expansion valve of indoor unit 6 shutting down indoor set is initial value, and t1 is 10-20 minute；In the present embodiment, 5 indoor sets are had to be in heating mode,
Step 2: detect each temperature value Ti(T1 heating exit heating indoor set, T2, T3, T4, T5) and this heat aperture PMVi(PMV1 of electronic expansion valve of indoor unit 6 of indoor set, PMV2, PMV3, PMV4, PMV5), calculate the average temperature value T1av((T1+T2+T3+T4+T5 heating exit heating indoor set)/5)；
Step 3: obtain the average temperature value T2av heating exit heating indoor set through revising and aperture average value P MVav of revised electronic expansion valve of indoor unit 6；nullObtain and specifically refer to each temperature value Ti heating exit heating indoor set detected is done with average temperature value Tav difference calculating respectively through the average temperature value T2av heating exit heating indoor set revised，If both differences are more than 5，Then reject aperture PMVi of this temperature value Ti and correspondence thereof，I.e. judge that whether T1-T1av is more than 5，Whether T2-T1av is more than 5，Whether T3-T1av is more than 5，Whether T4-T1av is more than 5，Whether T5-T1av is more than 5，If only T1-T1av is more than 5，Again to remaining temperature value Ti(T2，T3，T4，And aperture PMVi(PMV2 T5)，PMV3，PMV4，PMV5) carry out being averaging calculating，Obtain heating the average temperature value T2av((T2+T3+T4+T5 heating exit of indoor set)/4) and aperture average value P MVav ((PMV2+PMV3+PMV4+PMV5)/4) of electronic expansion valve of indoor unit 6；
Step 4: obtain saturation temperature value Tt of outdoor heat exchange machine 3, the high-pressure P run by detection compressor 1, to find out and saturation temperature value Tt corresponding to this high-pressure P, this saturation temperature value Tt is saturation temperature value Tt of outdoor heat exchange machine 3.Aperture PMV of organic electronic expansion valve 4 outside sensing chamber；In step 4, according to reducing the 1% of electronic expansion valve of indoor unit 6 maximum opening every t2S, t2 is 20-40S；The aperture reduced is added up, and judges whether the aperture of the accumulative electronic expansion valve of indoor unit 6 reduced is more than the 30% of the maximum opening of electronic expansion valve of indoor unit 6, if more than jumping to step 7, otherwise jump procedure two；Go to reduce aperture with a quantitative form according to a time period and within this time period, it is possible to ensure the accuracy of follow-up acquisition data.
Step 5: set and heat the condition that the coolant of indoor set is too much, if saturation temperature value Tt and average temperature value T2av((T2+T3+T4+T5)/4) difference, aperture average value P MVav ((PMV2+PMV3+PMV4+PMV5)/4) and off-premises station electric expansion valve 4 meet and heat the condition that the coolant of indoor set is too much, then enter step 6, otherwise redirect seven；nullSet and heat the condition that the coolant of indoor set is too much，If saturation temperature value Tt and average temperature value T2av((T2+T3+T4+T5)/4) difference、Aperture average value P MVav ((PMV2+PMV3+PMV4+PMV5)/4) and off-premises station electric expansion valve 4 meet and heat the condition that the coolant of indoor set is too much，Then enter step 6，Otherwise redirect seven，If specifically referring to meet saturation temperature value Tt and average temperature value T2av((T2+T3+T4+T5)/4) difference more than 8 degrees Celsius，And aperture average value P MVav ((PMV2+PMV3+PMV4+PMV5)/4) of electronic expansion valve of indoor unit 6 more than electronic expansion valve of indoor unit 6 maximum opening 80%，Or meet the 20% of aperture PMV of off-premises station electric expansion valve 4 maximum opening less than off-premises station electric expansion valve 4，Meet any one condition，Then enter step 6，Otherwise redirect seven.
Step 6: reduce the aperture of the electronic expansion valve of indoor unit 6 shutting down indoor set, jump to step 2；
Step 7: maintain the aperture of the electronic expansion valve of indoor unit 6 shutting down indoor set after reducing.
One unit of the present invention, it includes the indoor units 5 of compressor 1, cross valve 2, outdoor heat exchange machine 3, off-premises station electric expansion valve 4 and parallel connection, the outfan of the indoor set of described indoor units 5 is provided with electronic expansion valve of indoor unit 6；The outfan of described compressor 1, the first entrance point of cross valve 2, the input of indoor units 5, off-premises station electric expansion valve 4, outdoor heat exchange machine 3, the second entrance point of cross valve 2 and compressor 1 in parallel are sequentially connected with；It is characterized in that: it also include the pressure transducer 7 for detecting the high-pressure P that compressor 1 runs, be located at the temperature sensor 8 at the air outlet of indoor set, for sensing chamber outside first detection device 901 of the aperture of organic electronic expansion valve 4, for the second detection device 902 of electronic expansion valve of indoor unit 6 and the controller 10 of aperture of control electronic expansion valve of indoor unit 6；The input of described controller 10 is respectively with pressure transducer 7, temperature sensor 8, first detects device 901 and second detection device 902 electrically connects, and the outfan of described controller 10 electrically connects with electronic expansion valve of indoor unit 6.
Below only highly preferred embodiment of the present invention is described, but is not to be construed as limitations on claims.The present invention is not limited only to above example, and all various changes made in the protection domain of independent claims of the present invention are the most within the scope of the present invention.
Claims (8)
1. the method promoting multi-connected machine unit heating effect, it includes the indoor units (5) of compressor (1), cross valve (2), outdoor heat exchange machine (3), off-premises station electric expansion valve (4) and parallel connection, and the outfan of the indoor set of described indoor units (5) is provided with electronic expansion valve of indoor unit (6)；The outfan of described compressor (1) is connected by the input of cross valve (2) with indoor units (5) in parallel, the input of the outfan of indoor units (5) of described parallel connection, off-premises station electric expansion valve (4), outdoor heat exchange machine (3), cross valve (2) and compressor (1) is sequentially connected with, in order to realize refrigerant circulation；It is characterized in that: step one: the part indoor set in indoor units (5) is in heating mode, part indoor set is in shutdown mode, runs the t1 time；
Step 2: detect each temperature value Ti heating exit heating indoor set and this heats aperture PMVi of electronic expansion valve of indoor unit (6) of indoor set, calculate the average temperature value T1av heating exit heating indoor set；
Step 3: obtain the average temperature value T2av heating exit heating indoor set through revising and aperture average value P MVav of revised electronic expansion valve of indoor unit (6)；
Step 4: obtain saturation temperature value Tt of outdoor heat exchange machine (3), aperture PMV of organic electronic expansion valve (4) outside sensing chamber；
Step 5: set and heat the condition that the coolant of indoor set is too much, if the aperture of saturation temperature value Tt and the difference of average temperature value T2av, aperture average value P MVav and off-premises station electric expansion valve (4) meets heats the condition that the coolant of indoor set is too much, then enter step 6, otherwise redirect seven；
Step 6: reduce the aperture of the electronic expansion valve of indoor unit (6) shutting down indoor set, jump to step 2；
Step 7: maintain the aperture of the electronic expansion valve of indoor unit (6) shutting down indoor set after reducing.
A kind of method promoting multi-connected machine unit heating effect the most according to claim 1, it is characterised in that: in step 4, according to reducing the 1% of electronic expansion valve of indoor unit (6) maximum opening every t2S.
A kind of method promoting multi-connected machine unit heating effect the most according to claim 2, it is characterised in that: t2 is 20-40S.
A kind of method promoting multi-connected machine unit heating effect the most according to claim 1, it is characterized in that: obtain and specifically refer to each temperature value Ti heating exit heating indoor set detected is done with average temperature value Tav difference calculating respectively through the average temperature value T2av heating exit heating indoor set revised, if both differences are more than 5, then reject aperture PMVi of this temperature value Ti and correspondence thereof, again remaining temperature value Ti and aperture PMVi are averaging calculating, obtain heating the average temperature value T2av heating exit of indoor set and aperture average value P MVav of electronic expansion valve of indoor unit (6)；
nullA kind of method promoting multi-connected machine unit heating effect according to claim 1，It is characterized in that: set and heat the condition that the coolant of indoor set is too much，If saturation temperature value Tt and the difference of average temperature value T2av、The aperture of aperture average value P MVav and off-premises station electric expansion valve (4) meets and heats the condition that the coolant of indoor set is too much，Then enter step 6，Otherwise redirect seven，If specifically referring to meet the saturation temperature value Tt difference with average temperature value T2av more than 8 degrees Celsius，And aperture average value P MVav of electronic expansion valve of indoor unit (6) more than electronic expansion valve of indoor unit (6) maximum opening 80%，Or meet the 20% of aperture PMV of off-premises station electric expansion valve (4) maximum opening less than off-premises station electric expansion valve (4)，Meet any one condition，Then enter step 6，Otherwise redirect seven.
A kind of method promoting multi-connected machine unit heating effect the most according to claim 1, it is characterized in that: in step 4, the aperture reduced can be added up, and judge whether the aperture of the accumulative electronic expansion valve of indoor unit (6) reduced is more than the 30% of the maximum opening of electronic expansion valve of indoor unit (6), if more than jumping to step 7, otherwise jump procedure two.
A kind of method promoting multi-connected machine unit heating effect the most according to claim 1, it is characterized in that: in step 4, the high-pressure P run by detection compressor (1), finding out and saturation temperature value Tt corresponding to this high-pressure P, this saturation temperature value Tt is saturation temperature value Tt of outdoor heat exchange machine (3).
A kind of method promoting multi-connected machine unit heating effect the most according to claim 1, it is characterised in that: t1 is 10-20 minute.
8. a unit based on the method promoting multi-connected machine unit heating effect described in claim 1, it is characterised in that: it also includes the pressure transducer (7) for detecting the high-pressure P that compressor (1) runs, is located at the controller (10) of the aperture of the temperature sensor (8) at the air outlet of indoor set, the first detection device (901) of the aperture of organic electronic expansion valve (4) outside sensing chamber, the second detection device (902) for electronic expansion valve of indoor unit (6) and control electronic expansion valve of indoor unit (6)；The input of described controller (10) electrically connects with pressure transducer (7), temperature sensor (8), the first detection device (901) and second detection device (902) respectively, and the outfan of described controller (10) electrically connects with electronic expansion valve of indoor unit (6).
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| CN201610280572.9A CN105865096B (en) | 2016-04-29 | 2016-04-29 | A kind of method and its unit for lifting multi-connected machine unit heating effect |
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| CN201610280572.9A CN105865096B (en) | 2016-04-29 | 2016-04-29 | A kind of method and its unit for lifting multi-connected machine unit heating effect |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110553339A (en) * | 2019-09-19 | 2019-12-10 | 宁波奥克斯电气股份有限公司 | Heat accumulation prevention control method and device for multi-split air conditioner and air conditioner |
| CN111765609A (en) * | 2020-06-30 | 2020-10-13 | 海信（山东）空调有限公司 | Multi-split air conditioner control method, multi-split air conditioner and storage medium |
| CN113188230A (en) * | 2021-04-16 | 2021-07-30 | 宁波奥克斯电气股份有限公司 | Expansion valve control method and device of multi-connected air conditioner and multi-connected air conditioner |
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| CN111765609B (en) * | 2020-06-30 | 2021-10-22 | 海信（山东）空调有限公司 | Multi-split air conditioner control method, multi-split air conditioner and storage medium |
| CN113188230A (en) * | 2021-04-16 | 2021-07-30 | 宁波奥克斯电气股份有限公司 | Expansion valve control method and device of multi-connected air conditioner and multi-connected air conditioner |
| CN113188230B (en) * | 2021-04-16 | 2022-06-28 | 宁波奥克斯电气股份有限公司 | Expansion valve control method and device of multi-connected air conditioner and multi-connected air conditioner |
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