CN105757893A - Heat exchange control method of multi-unit system and outdoor heat exchanger thereof - Google Patents

Heat exchange control method of multi-unit system and outdoor heat exchanger thereof Download PDF

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Publication number
CN105757893A
CN105757893A CN201610173711.8A CN201610173711A CN105757893A CN 105757893 A CN105757893 A CN 105757893A CN 201610173711 A CN201610173711 A CN 201610173711A CN 105757893 A CN105757893 A CN 105757893A
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indoor set
heat exchanger
heat exchange
outdoor heat
outdoor
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CN105757893B (en
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杨坤
杨国忠
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Midea Group Co Ltd
Guangdong Midea HVAC Equipment Co Ltd
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Midea Group Co Ltd
Guangdong Midea HVAC Equipment Co Ltd
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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
    • F24F2110/10—Temperature
    • 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
    • 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
    • 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
    • F24F11/62—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
    • 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
    • F24F2110/10—Temperature
    • F24F2110/12—Temperature of the outside air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2140/00—Control inputs relating to system states
    • F24F2140/50—Load

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Atmospheric Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Fuzzy Systems (AREA)
  • Mathematical Physics (AREA)
  • Signal Processing (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

The invention discloses a heat exchange control method of a multi-unit system and an outdoor heat exchanger thereof. The method comprises the following steps: respectively computing the total heat exchange amount Qh and Qc of heating indoor units and refrigeration indoor units according to saturated temperatures Tcs and Tes corresponding to the target discharge pressure and the target air return pressure of a compressor and operating parameters of all the heating indoor units and the refrigeration indoor units at start state when the system is started or the start capacities of the indoor units are changed; judging the operating mode of the outdoor heat exchanger and estimating the power Pcom of the compressor; estimating the initial gear of the outdoor heat exchanger according to the outdoor environment temperature, the operating mode of the outdoor heat exchanger, Pcom, Qh and Qc, and performing heat exchange control on the outdoor heat exchanger according to the initial gear. The method can directly judge the initial gear of the outdoor heat exchanger when the system is started or the start capacities of the indoor units are changed, accelerate the stability process of the system, and avoid the problems of too long stability time of the system and too high and too low of high pressure in part of conditions.

Description

The heat exchange control of multiple on-line system and outdoor heat exchanger thereof
Technical field
The present invention relates to air-conditioning technical field, particularly to the heat exchange control of outdoor heat exchanger in a kind of multiple on-line system and a kind of multiple on-line system.
Background technology
For using the air handling system of multi-connected air conditioning system, the indoor set connected can up to tens, therefore inner side load variations scope is very big, only by regulating the rotating speed of outdoor fan, can not meet far away inner side load variations demand, therefore, generally outdoor heat exchanger is carried out block design, outdoor heat exchanger is divided into N block, is turned on and off part piecemeal according to workload demand.Thus bring a problem: how to be mapped with the load of inner side wide variation by the different piecemeals of outdoor heat exchanger.
In correlation technique, it is first start with the bigger heat exchange area of the fixing system that a can ensure that reliability service, the then change according to system mode, progressively adjust the heat exchange area of outdoor heat exchanger and the wind shelves of outdoor fan.But, the adjustment process of which is relatively slower, causes that system comfortableness declines.Under some operating mode, if original speed position deviation is relatively big, being then easy to occur that gear frequently switches or the too high too low situation of high pressure, system stability is protected very slowly or frequently, affects the comfortableness of user and the reliability of system.
Summary of the invention
It is contemplated that one of technical problem solved at least to a certain extent in correlation technique.For this, it is an object of the present invention to propose the heat exchange control of outdoor heat exchanger in a kind of multiple on-line system, by estimating that outdoor heat exchanger is carried out heat exchange control by the original speed position of outdoor heat exchanger, the stable process of acceleration system, avoid that the stabilization time when start capacity of system start-up start or indoor set changes is longer and the too high too low problem of high pressure, improve the comfortableness of user and the reliability of system.
Second purpose of the present invention is in that to propose a kind of multiple on-line system.
nullFor reaching above-mentioned purpose，First aspect present invention embodiment proposes the heat exchange control of outdoor heat exchanger in a kind of multiple on-line system，Described multiple on-line system includes off-premises station、Multiple indoor sets and part flow arrangement，Described off-premises station includes compressor and described outdoor heat exchanger，Described outdoor heat exchanger has multiple heat exchange gear，The corresponding heat exchange area of each heat exchange gear，Said method comprising the steps of: when in the startup start of described multiple on-line system or described multiple on-line system, the start capacity of indoor set changes，Described part flow arrangement obtains the operational factor of each operational factor heating indoor set and each refrigeration indoor set being in open state being in open state in the plurality of indoor set，And the saturation temperature Tes corresponding with target back pressure for saturation temperature Tcs that the target exhaust pressure that obtains described compressor is corresponding；According to Tcs, Tes and be in open state each operational factor heating indoor set and be in open state each refrigeration indoor set operational factor calculate heat indoor set total heat exchange amount Qh and refrigeration indoor set total heat exchange amount Qc；Judging the operational mode of described outdoor heat exchanger the power P com of the operational mode described compressor of estimation according to described outdoor heat exchanger, wherein, the operational mode of described outdoor heat exchanger includes evaporator mode and condenser modes；Obtain outdoor environment temperature, and estimate the original speed position of described outdoor heat exchanger according to total heat exchange amount Qc of described outdoor environment temperature, the operational mode of described outdoor heat exchanger, the power P com of described compressor, the total heat exchange amount Qh heating indoor set and refrigeration indoor set, and described outdoor heat exchanger carries out heat exchange control by the original speed position according to described outdoor heat exchanger.
The heat exchange control of outdoor heat exchanger in multiple on-line system according to embodiments of the present invention, when in multiple on-line system startup start or multiple on-line system, the start capacity of indoor set changes, the operational factor of each operational factor heating indoor set and each refrigeration indoor set being in open state being in open state in multiple indoor set is obtained by part flow arrangement, and the saturation temperature Tes corresponding with target back pressure for saturation temperature Tcs that the target exhaust pressure that obtains compressor is corresponding, and according to Tcs, Tes and be in the operational factor of the operational factor that open state each heat indoor set and each refrigeration indoor set being in open state and calculate the total heat exchange amount Qh heating indoor set and total heat exchange amount Qc of refrigeration indoor set.And, judge the operational mode of outdoor heat exchanger, and the power P com of the operational mode estimation compressor according to outdoor heat exchanger, and acquisition outdoor environment temperature, and the original speed position of the total heat exchange amount Qc estimation outdoor heat exchanger according to outdoor environment temperature, the operational mode of outdoor heat exchanger, the power P com of compressor, the total heat exchange amount Qh heating indoor set and refrigeration indoor set, according to the original speed position of outdoor heat exchanger, outdoor heat exchanger is carried out heat exchange control.Thus, can when the start volume change of system start-up start or indoor set, directly judge the original speed position of outdoor heat exchanger, the stable process of acceleration system, avoid the problem that system stability time length under Part load, high pressure are too high or too low, improve the comfortableness of user and the reliability of system.
According to one embodiment of present invention, the described each operational factor heating indoor set being in open state includes heating a number of indoor set, heat the aperture of restricting element in indoor set, heat the rotation speed of fan of indoor set, heat the setting static pressure of indoor set, heat return air dry bulb temperature and the wet bulb temperature of indoor set, the operational factor of the described each refrigeration indoor set being in open state includes a number of refrigeration indoor set, the aperture of restricting element in refrigeration indoor set, the rotation speed of fan of refrigeration indoor set, the setting static pressure of refrigeration indoor set, the return air dry bulb temperature of refrigeration indoor set and wet bulb temperature.
According to one embodiment of present invention, according to Tcs, Tes and be in open state each operational factor heating indoor set and be in open state each refrigeration indoor set operational factor calculate heat indoor set total heat exchange amount Qh and refrigeration indoor set total heat exchange amount Qc, including: calculate according to Tcs and heat the first temperature value T1 that indoor set is corresponding, and calculate, according to Tes, the second temperature value T2 that refrigeration indoor set is corresponding；According to heating the rotation speed of fan ri of indoor set and heating setting static pressure SPi calculating blower fan air output Si=f1 (ri, SPi) of indoor set, wherein, i is the number heating indoor set being in open state；Obtain the high pressure P S1 and middle pressure PS2 of part flow arrangement, and according to described high pressure P S1, medium pressure PS2, described blower fan air output Si with heat the aperture EEVi of restricting element in indoor set and calculate and heat KA value KAi=g1 (the △ P1 of indoor set, EEVi, Si), wherein, △ P1=PS1-PS2；According to described blower fan air output Si, heat the KA value KAi of indoor set, described first temperature value T1 and heat the return air dry bulb temperature ti of indoor set and calculate and heat total heat exchange amount Qh=Σ [KAi*Si* (T1-ti)] of indoor set.
According to one embodiment of present invention, according to Tcs, Tes and be in open state each operational factor heating indoor set and be in open state each refrigeration indoor set operational factor calculate heat indoor set total heat exchange amount Qh and refrigeration indoor set total heat exchange amount Qc, also include: calculate blower fan air output Sj=f2 (rj according to the setting static pressure SPj of the rotation speed of fan rj of refrigeration indoor set and refrigeration indoor set, SPj), wherein, j is the number of the refrigeration indoor set being in open state；Obtain the middle pressure PS2 and low pressure PS3 of part flow arrangement, and calculate KA value KAj=g2 (the △ P2 of refrigeration indoor set according to the aperture EEVj of restricting element in described low pressure PS3, medium pressure PS2, described blower fan air output Sj and refrigeration indoor set, EEVj, Sj), wherein, △ P2=PS2-PS3；Wet bulb temperature tdj according to described blower fan air output Sj, the refrigeration KA value KAj of indoor set, described second temperature value T2 and refrigeration indoor set calculates total heat exchange amount Qc=Σ [KAj*Sj* (tdj-T2)] of refrigeration indoor set.
According to one embodiment of present invention, operational mode according to described outdoor heat exchanger estimates the power P com of described compressor, including: when described outdoor heat exchanger runs with evaporator mode, power P com=f3 (the ti of described compressor is estimated according to each rated power Pei and return air dry bulb temperature ti heating indoor set being in open state, Pei), wherein, i is the number heating indoor set being in open state；When described outdoor heat exchanger runs with condenser modes, rated power Pej and return air dry bulb temperature tj according to each refrigeration indoor set being in open state estimates the power P com=g3 (tj of described compressor, Pej), wherein, j is the number of the refrigeration indoor set being in open state.
According to one embodiment of present invention, when estimating the power P com of described compressor, if described off-premises station is in start-up phase, then judge that whether (Qc-Qh)/Qstd is more than the first preset value A1, wherein, Qstd is the nominal refrigerating capacity value of described off-premises station, if (Qc-Qh)/Qstd is > A1, then controls described outdoor heat exchanger and starts with condenser modes；If (Qc-Qh)/Qstd≤A1, then control described outdoor heat exchanger and start with evaporator mode.
According to one embodiment of present invention, total heat exchange amount Qc according to described outdoor environment temperature, the operational mode of described outdoor heat exchanger, the power P com of described compressor, the total heat exchange amount Qh heating indoor set and refrigeration indoor set estimates the original speed position of described outdoor heat exchanger, including: when described outdoor heat exchanger runs with evaporator mode, obtain outdoor fan air quantity So1 corresponding when outdoor fan runs with the most strong wind shelves allowed；According to outdoor fan air quantity So1, by the calculated second temperature value T2 of Tes, described outdoor environment temperature tamb, described in heat total heat exchange amount Qh of indoor set, total heat exchange amount Qc of described refrigeration indoor set, described compressor power P com calculate the KA value KAe to reach of described outdoor heat exchangerneed=(Qh-Qc-Pcom)/[So1* (tamb-T2)]；According to a described KA value KAeneedObtain the estimation gear of described outdoor heat exchanger the original speed position of the estimation gear described outdoor heat exchanger of calculating according to described outdoor heat exchanger.
According to one embodiment of present invention, total heat exchange amount Qc according to described outdoor environment temperature, the operational mode of described outdoor heat exchanger, the power P com of described compressor, the total heat exchange amount Qh heating indoor set and refrigeration indoor set estimates the original speed position of described outdoor heat exchanger, also include: when described outdoor heat exchanger runs with condenser modes, obtain outdoor fan air quantity So2 corresponding when described outdoor fan runs with the minimum wind shelves allowed；According to outdoor fan air quantity So2, by the calculated first temperature value T1 of Tcs, described outdoor environment temperature tamb, described in heat total heat exchange amount Qh of indoor set, total heat exchange amount Qc of described refrigeration indoor set, described compressor power P com calculate the 2nd KA value KAc to reach of described outdoor heat exchangerneed=(Qc+Pcom-Qh)/[So2* (T1-tamb)]；According to described 2nd KA value KAcneedObtain the estimation gear of described outdoor heat exchanger the original speed position of the estimation gear described outdoor heat exchanger of calculating according to described outdoor heat exchanger.
For reaching above-mentioned purpose, a second aspect of the present invention embodiment proposes a kind of multiple on-line system, including: multiple indoor sets；Off-premises station, described off-premises station includes outdoor controller, outdoor heat exchanger and compressor, and described outdoor heat exchanger has multiple heat exchange gear, the corresponding heat exchange area of each heat exchange gear；nullPart flow arrangement，Described part flow arrangement starts the capacity of starting shooting of indoor set in start or described multiple on-line system and obtains the operational factor of each operational factor heating indoor set and each refrigeration indoor set being in open state being in open state in the plurality of indoor set when changing in described multiple on-line system，And the saturation temperature Tes corresponding with target back pressure for saturation temperature Tcs that the target exhaust pressure that obtains described compressor is corresponding，And according to Tcs、Tes and be in the operational factor of the operational factor that open state each heat indoor set and each refrigeration indoor set being in open state and calculate the total heat exchange amount Qh heating indoor set and total heat exchange amount Qc of refrigeration indoor set，And，Described outdoor controller is for judging the operational mode of described outdoor heat exchanger，And the power P com of the operational mode described compressor of estimation according to described outdoor heat exchanger，Wherein，The operational mode of described outdoor heat exchanger includes evaporator mode and condenser modes；Described outdoor controller is additionally operable to obtain outdoor environment temperature, and estimate the original speed position of described outdoor heat exchanger according to total heat exchange amount Qc of described outdoor environment temperature, the operational mode of described outdoor heat exchanger, the power P com of described compressor, the total heat exchange amount Qh heating indoor set and refrigeration indoor set, and according to the original speed position of described outdoor heat exchanger described outdoor heat exchanger carried out heat exchange control.
Multiple on-line system according to embodiments of the present invention, start the capacity of starting shooting of indoor set in start or multiple on-line system by part flow arrangement in multiple on-line system and when changing, obtain the operational factor of each operational factor heating indoor set and each refrigeration indoor set being in open state being in open state in multiple indoor set, and the saturation temperature Tes corresponding with target back pressure for saturation temperature Tcs that the target exhaust pressure that obtains compressor is corresponding, and according to Tcs, Tes and be in the operational factor of the operational factor that open state each heat indoor set and each refrigeration indoor set being in open state and calculate the total heat exchange amount Qh heating indoor set and total heat exchange amount Qc of refrigeration indoor set.And, the operational mode of outdoor heat exchanger is judged by outdoor controller, and the power P com of the operational mode estimation compressor according to outdoor heat exchanger, and obtain outdoor environment temperature by outdoor controller, and according to the original speed position that total heat exchange amount Qc of outdoor environment temperature, the operational mode of outdoor heat exchanger, the power P com of compressor, the total heat exchange amount Qh heating indoor set and refrigeration indoor set estimates outdoor heat exchanger, according to the original speed position of outdoor heat exchanger outdoor heat exchanger carried out heat exchange control.Thus, can when the start volume change of system start-up start or indoor set, directly judge the original speed position of outdoor heat exchanger, the stable process of acceleration system, avoid the problem that system stability time length under Part load, high pressure are too high or too low, improve the comfortableness of user and the reliability of system.
According to one embodiment of present invention, the described each operational factor heating indoor set being in open state includes heating a number of indoor set, heat the aperture of restricting element in indoor set, heat the rotation speed of fan of indoor set, heat the setting static pressure of indoor set, heat return air dry bulb temperature and the wet bulb temperature of indoor set, the operational factor of the described each refrigeration indoor set being in open state includes a number of refrigeration indoor set, the aperture of restricting element in refrigeration indoor set, the rotation speed of fan of refrigeration indoor set, the setting static pressure of refrigeration indoor set, the return air dry bulb temperature of refrigeration indoor set and wet bulb temperature.
According to one embodiment of present invention, described part flow arrangement according to Tcs, Tes and be in open state each operational factor heating indoor set and be in open state each refrigeration indoor set operational factor calculate heat indoor set total heat exchange amount Qh and refrigeration indoor set total heat exchange amount Qc time, wherein, described part flow arrangement calculates according to Tcs and heats the first temperature value T1 that indoor set is corresponding, and calculates, according to Tes, the second temperature value T2 that refrigeration indoor set is corresponding；Described part flow arrangement is according to heating the rotation speed of fan ri of indoor set and heating setting static pressure SPi calculating blower fan air output Si=f1 (ri, SPi) of indoor set, and wherein, i is the number heating indoor set being in open state；Described part flow arrangement is according to the high pressure P S1 of described part flow arrangement, middle pressure PS2, the described blower fan air output Si of described part flow arrangement and heats the aperture EEVi of restricting element in indoor set and calculates and heat KA value KAi=g1 (the △ P1 of indoor set, EEVi, Si), wherein, △ P1=PS1-PS2；Described part flow arrangement according to described blower fan air output Si, heat the KA value KAi of indoor set, described first temperature value T1 and heat the return air dry bulb temperature ti of indoor set and calculate and heat total heat exchange amount Qh=Σ [KAi*Si* (T1-ti)] of indoor set.
According to one embodiment of present invention, described part flow arrangement according to Tcs, Tes and be in open state each operational factor heating indoor set and be in open state each refrigeration indoor set operational factor calculate heat indoor set total heat exchange amount Qh and refrigeration indoor set total heat exchange amount Qc time, wherein, described part flow arrangement calculates blower fan air output Sj=f2 (rj always according to the rotation speed of fan rj of refrigeration indoor set and the setting static pressure SPj of refrigeration indoor set, SPj), wherein, j is the number of the refrigeration indoor set being in open state；And, described part flow arrangement presses the aperture EEVj of restricting element in PS2, described blower fan air output Sj and refrigeration indoor set to calculate KA value KAj=g2 (the △ P2 of refrigeration indoor set according to the low pressure PS3 of described part flow arrangement, the middle of described part flow arrangement, EEVj, Sj), wherein, △ P2=PS2-PS3；And, described part flow arrangement calculates total heat exchange amount Qc=Σ [KAj*Sj* (tdj-T2)] of refrigeration indoor set according to the wet bulb temperature tdj of described blower fan air output Sj, the refrigeration KA value KAj of indoor set, described second temperature value T2 and refrigeration indoor set.
According to one embodiment of present invention, when described outdoor controller estimates the power P com of described compressor according to the operational mode of described outdoor heat exchanger, when described outdoor heat exchanger runs with evaporator mode, described outdoor controller estimates the power P com=f3 (ti of described compressor according to each rated power Pei and return air dry bulb temperature ti heating indoor set being in open state, Pei), wherein, i is the number heating indoor set being in open state；When described outdoor heat exchanger runs with condenser modes, described outdoor controller estimates the power P com=g3 (tj of described compressor according to the rated power Pej and return air dry bulb temperature tj of each refrigeration indoor set being in open state, Pej), wherein, j is the number of the refrigeration indoor set being in open state.
According to one embodiment of present invention, when estimating the power P com of described compressor, if described off-premises station is in start-up phase, described outdoor controller then judges that whether (Qc-Qh)/Qstd is more than the first preset value A1, wherein, Qstd is the nominal refrigerating capacity value of described off-premises station, if (Qc-Qh)/Qstd is > A1, described outdoor controller then controls described outdoor heat exchanger and starts with condenser modes；If (Qc-Qh)/Qstd≤A1, described outdoor controller then controls described outdoor heat exchanger and starts with evaporator mode.
According to one embodiment of present invention, when described outdoor controller estimates the original speed position of described outdoor heat exchanger according to total heat exchange amount Qc of described outdoor environment temperature, the operational mode of described outdoor heat exchanger, the power P com of described compressor, the total heat exchange amount Qh heating indoor set and refrigeration indoor set, wherein, when described outdoor heat exchanger runs with evaporator mode, described outdoor controller obtains outdoor fan air quantity So1 corresponding when outdoor fan runs with the most strong wind shelves allowed；Further, described outdoor controller according to outdoor fan air quantity So1, by the calculated second temperature value T2 of Tes, described outdoor environment temperature tamb, described in heat total heat exchange amount Qh of indoor set, total heat exchange amount Qc of described refrigeration indoor set, described compressor power P com calculate the KA value KAe to reach of described outdoor heat exchangerneed=(Qh-Qc-Pcom)/[So1* (tamb-T2)]；And, described outdoor controller is according to a described KA value KAeneedObtain the estimation gear of described outdoor heat exchanger the original speed position of the estimation gear described outdoor heat exchanger of calculating according to described outdoor heat exchanger.
According to one embodiment of present invention, when described outdoor controller estimates the original speed position of described outdoor heat exchanger according to total heat exchange amount Qc of described outdoor environment temperature, the operational mode of described outdoor heat exchanger, the power P com of described compressor, the total heat exchange amount Qh heating indoor set and refrigeration indoor set, wherein, when described outdoor heat exchanger runs with condenser modes, described outdoor controller obtains outdoor fan air quantity So2 corresponding when described outdoor fan runs with the minimum wind shelves allowed；Further, described outdoor controller according to outdoor fan air quantity So2, by the calculated first temperature value T1 of Tcs, described outdoor environment temperature tamb, described in heat total heat exchange amount Qh of indoor set, total heat exchange amount Qc of described refrigeration indoor set, described compressor power P com calculate the 2nd KA value KAc to reach of described outdoor heat exchangerneed=(Qc+Pcom-Qh)/[So2* (T1-tamb)]；And, described outdoor controller is according to described 2nd KA value KAcneedObtain the estimation gear of described outdoor heat exchanger the original speed position of the estimation gear described outdoor heat exchanger of calculating according to described outdoor heat exchanger.
Accompanying drawing explanation
The present invention above-mentioned and/or that add aspect and advantage will be apparent from easy to understand from the following description of the accompanying drawings of embodiments, wherein,
Fig. 1 is the flow chart of the heat-exchange method of outdoor heat exchanger in multiple on-line system according to an embodiment of the invention；
Fig. 2 is the structural representation of multiple on-line system according to an embodiment of the invention；And
The heat exchange that Fig. 3 is the outdoor heat exchanger in multiple on-line system according to an embodiment of the invention controls process flow diagram flow chart.
Detailed description of the invention
Being described below in detail embodiments of the invention, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has the element of same or like function from start to finish.The embodiment described below with reference to accompanying drawing is illustrative of, it is intended to is used for explaining the present invention, and is not considered as limiting the invention.
Heat exchange control and the multiple on-line system of outdoor heat exchanger in the multiple on-line system proposed according to embodiments of the present invention are described with reference to the accompanying drawings.
Fig. 1 is the flow chart of the heat-exchange method of outdoor heat exchanger in multiple on-line system according to an embodiment of the invention.Wherein, multiple on-line system includes off-premises station, multiple indoor set and part flow arrangement, and off-premises station includes compressor and outdoor heat exchanger, and outdoor heat exchanger has multiple heat exchange gear, the corresponding heat exchange area of each heat exchange gear.
As it is shown in figure 1, the heat-exchange method of outdoor heat exchanger comprises the following steps in this multiple on-line system:
S1, when in multiple on-line system startup start or multiple on-line system, the start capacity of indoor set changes, part flow arrangement obtains in multiple indoor sets each operational factor heating indoor set being in open state and is in the operational factor of each refrigeration indoor set of open state, and the saturation temperature Tes corresponding with target back pressure for saturation temperature Tcs that the target exhaust pressure that obtains compressor is corresponding.
In one embodiment of the invention, the each operational factor heating indoor set being in open state can include heating a number of indoor set, heat the aperture of restricting element in indoor set, heat the rotation speed of fan of indoor set, heat the setting static pressure of indoor set, heat return air dry bulb temperature and the wet bulb temperature of indoor set, the operational factor being in each refrigeration indoor set of open state can include a number of refrigeration indoor set, the aperture of restricting element in refrigeration indoor set, the rotation speed of fan of refrigeration indoor set, the setting static pressure of refrigeration indoor set, the return air dry bulb temperature of refrigeration indoor set and wet bulb temperature.
S2, according to Tcs, Tes and be in open state each operational factor heating indoor set and be in open state each refrigeration indoor set operational factor calculate heat indoor set total heat exchange amount Qh and refrigeration indoor set total heat exchange amount Qc.
According to one embodiment of present invention, according to Tcs and be in open state each and heat the operational factor of indoor set and calculate the total heat exchange amount Qh heating indoor set, including: calculate according to Tcs and heat the first temperature value T1 that indoor set is corresponding, for instance, it is possible to make the first temperature value T1=Tcs-2；Then, according to heating the rotation speed of fan ri of indoor set and heating setting static pressure SPi calculating blower fan air output Si=f1 (ri, SPi) of indoor set, wherein, i is the number heating indoor set being in open state；Obtain the high pressure P S1 and middle pressure PS2 of part flow arrangement, and according to high pressure P S1, middle pressure PS2, blower fan air output Si with heat the aperture EEVi of restricting element in indoor set and calculate and heat the KA value KAi=g1 (△ P1, EEVi, Si) of indoor set, wherein, △ P1=PS1-PS2；Finally, according to blower fan air output Si, heat the KA value KAi of indoor set, the first temperature value T1 and heat the return air dry bulb temperature ti of indoor set and calculate and heat total heat exchange amount Qh=Σ [KAi*Si* (T1-ti)] of indoor set.
Further, operational factor according to Tes and each refrigeration indoor set being in open state calculates total heat exchange amount Qc of refrigeration indoor set, including: calculate, according to Tes, the second temperature value T2 that refrigeration indoor set is corresponding, for instance, it is possible to make the second temperature value T2=Tes+2；Further, calculating blower fan air output Sj=f2 (rj, SPj) according to the setting static pressure SPj of the rotation speed of fan rj of refrigeration indoor set and refrigeration indoor set, wherein, j is the number of the refrigeration indoor set being in open state；Then, obtain the middle pressure PS2 and low pressure PS3 of part flow arrangement, and calculate KA value KAj=g2 (the △ P2 of refrigeration indoor set according to the aperture EEVj of restricting element in low pressure PS3, middle pressure PS2, blower fan air output Sj and refrigeration indoor set, EEVj, Sj), wherein, △ P2=PS2-PS3；Finally, total heat exchange amount Qc=Σ [KAj*Sj* (tdj-T2)] of refrigeration indoor set is calculated according to the wet bulb temperature tdj of blower fan air output Sj, the refrigeration KA value KAj of indoor set, the second temperature value T2 and refrigeration indoor set.
It should be noted that when without humidity data, it can be assumed that indoor air relative humidity is 60%, and according to indoor air relative humidity, wet bulb temperature tdj is estimated.
S3, it is judged that the operational mode of outdoor heat exchanger, and the power P com of the operational mode estimation compressor according to outdoor heat exchanger, wherein, the operational mode of outdoor heat exchanger includes evaporator mode and condenser modes.
According to one embodiment of present invention, the power P com of the operational mode estimation compressor according to outdoor heat exchanger, including: when outdoor heat exchanger runs with evaporator mode, power P com=f3 (the ti of compressor is estimated according to each rated power Pei and return air dry bulb temperature ti heating indoor set being in open state, Pei), wherein, i is the number heating indoor set being in open state；When outdoor heat exchanger runs with condenser modes, rated power Pej and return air dry bulb temperature tj according to each refrigeration indoor set being in open state estimates the power P com=g3 (tj of compressor, Pej), wherein, j is the number of the refrigeration indoor set being in open state.
Further, when estimating the power P com of compressor, if off-premises station is in start-up phase, then judge that whether (Qc-Qh)/Qstd is more than the first preset value A1, wherein, Qstd is the nominal refrigerating capacity value of off-premises station, if (Qc-Qh)/Qstd is > A1, then control room external heat exchanger starts with condenser modes；If (Qc-Qh)/Qstd≤A1, then control room external heat exchanger starts with evaporator mode.
Specifically, when estimating the power P com of compressor, first determine whether whether off-premises station is in start-up phase.If off-premises station is in start-up phase, then first judge the start-up mode of outdoor heat exchanger according to total heat exchange amount Qc and the total heat exchange amount Qh heating indoor set of refrigeration indoor set.Namely, as (Qc-Qh)/Qstd > A1, control room external heat exchanger starts with condenser modes；As (Qc-Qh)/Qstd≤A1, control room external heat exchanger starts with evaporator mode.
And if off-premises station is already powered on completes, then the judgement of the start-up mode to off-premises station can be omitted, directly estimate the power P com of compressor according to the present mode of operation of off-premises station.When outdoor heat exchanger runs with evaporator mode, the power of compressor can be Pcom=B2* Σ ((B1-ti) * Pei/Qstd1) * Pstd, wherein, B1, B2 are experimental fit coefficient of association, ti is each return air dry bulb temperature heating indoor set being in open state, Pei is each rated power heating indoor set being in open state, and Qstd1 is each nominal refrigerating capacity value heating indoor set being in open state, and Pstd is the rated power of off-premises station.Further, if the minimum power Pmin that the power P com of the compressor of estimation allows less than compressor, then Pcom is taken equal to minimum power Pmin；If the peak power Pmax that the power P com of the compressor of estimation allows more than compressor, then take Pcom equal to peak power Pmax.And when outdoor heat exchanger runs with condenser modes, the power of compressor can be Pcom=B4* Σ ((tj-B3) * Pej/Qstd2) * Pstd, wherein, B3, B4 are experimental fit coefficient of association, Pej is the rated power of each refrigeration indoor set being in open state, tj is the return air dry bulb temperature of each refrigeration indoor set being in open state, Qstd2 is the nominal refrigerating capacity value of each refrigeration indoor set being in open state, and Pstd is the rated power of off-premises station.Further, if the power P com of the compressor of estimation is less than minimum power Pmin, then Pcom is taken equal to minimum power Pmin；If the power P com of the compressor of estimation is more than peak power Pmax, then take Pcom equal to peak power Pmax.
S4, obtain outdoor environment temperature, and estimate the original speed position of outdoor heat exchanger according to total heat exchange amount Qc of outdoor environment temperature, the operational mode of outdoor heat exchanger, the power P com of compressor, the total heat exchange amount Qh heating indoor set and refrigeration indoor set, and outdoor heat exchanger carries out heat exchange control by the original speed position according to outdoor heat exchanger.
According to one embodiment of present invention, total heat exchange amount Qc according to outdoor environment temperature, the operational mode of outdoor heat exchanger, the power P com of compressor, the total heat exchange amount Qh heating indoor set and refrigeration indoor set estimates the original speed position of outdoor heat exchanger, including: when outdoor heat exchanger runs with evaporator mode, obtain outdoor fan air quantity So1 corresponding when outdoor fan runs with the most strong wind shelves allowed；According to outdoor fan air quantity So1, by the calculated second temperature value T2 of Tes, outdoor environment temperature tamb, heat the KA value KAe to reach of power P com counting chamber external heat exchanger of total heat exchange amount Qh of indoor set, refrigeration total heat exchange amount Qc of indoor set, compressorneed=(Qh-Qc-Pcom)/[So1* (tamb-T2)]；According to a KA value KAeneedObtain the estimation gear of outdoor heat exchanger the original speed position of the estimation gear counting chamber external heat exchanger according to outdoor heat exchanger.
For example, it is possible in advance by the vaporizer KA value corresponding to the heat exchange gear of outdoor heat exchangers different under standard condition, and outdoor fan air quantity corresponding to the wind shelves of outdoor fan carries out corresponding storage.When outdoor heat exchanger runs with evaporator mode, allow the most strong wind shelves of outdoor fan that run as the initial wind shelves of current outdoor blower fan, i.e. DW under current environmentin1=DWmax, then inquire about wind shelves and the outdoor fan air quantity synopsis of outdoor fan, to obtain the initial wind shelves DW of outdoor fanin1Corresponding outdoor fan air quantity So1.According to the outdoor fan air quantity So1 obtained, the second temperature value T2, outdoor environment temperature tamb, heat the KA value KAe to reach of power P com counting chamber external heat exchanger of total heat exchange amount Qh of indoor set, refrigeration total heat exchange amount Qc of indoor set, compressorneed=(Qh-Qc-Pcom)/[So1* (tamb-T2)], and inquire about heat exchange gear and the vaporizer KA value synopsis of different chamber's external heat exchanger, to obtain closest to a KA value KAeneedHigher value, and it can be used as the original speed position of outdoor heat exchanger, simultaneously by (DWin1-2) as the initial wind shelves of final outdoor fan.
Further, total heat exchange amount Qc according to outdoor environment temperature, the operational mode of outdoor heat exchanger, the power P com of compressor, the total heat exchange amount Qh heating indoor set and refrigeration indoor set estimates the original speed position of outdoor heat exchanger, also include: when outdoor heat exchanger runs with condenser modes, obtain outdoor fan air quantity So2 corresponding when outdoor fan runs with the minimum wind shelves allowed；According to outdoor fan air quantity So2, by the calculated first temperature value T1 of Tcs, outdoor environment temperature tamb, heat the 2nd KA value KAc to reach of power P com counting chamber external heat exchanger of total heat exchange amount Qh of indoor set, refrigeration total heat exchange amount Qc of indoor set, compressorneed=(Qc+Pcom-Qh)/[So2* (T1-tamb)]；According to the 2nd KA value KAcneedObtain the estimation gear of outdoor heat exchanger the original speed position of the estimation gear counting chamber external heat exchanger according to outdoor heat exchanger.
For example, it is possible in advance by the condenser KA value corresponding to the heat exchange gear of outdoor heat exchangers different under standard condition, and outdoor fan air quantity corresponding to the wind shelves of outdoor fan carries out corresponding storage.When outdoor heat exchanger runs with condenser modes, allow the minimum wind shelves of outdoor fan that run as the initial wind shelves of current outdoor blower fan, i.e. DW under current environmentin1=DWmin, then inquire about wind shelves and the outdoor fan air quantity synopsis of outdoor fan, to obtain the initial wind shelves DW of outdoor fanin1Corresponding outdoor fan air quantity So2.According to the outdoor fan air quantity So2 obtained, the first temperature value T1, outdoor environment temperature tamb, heat the 2nd KA value KAc to reach of power P com counting chamber external heat exchanger of total heat exchange amount Qh of indoor set, refrigeration total heat exchange amount Qc of indoor set, compressorneed=(Qc+Pcom-Qh)/[So2* (T1-tamb)], and inquire about heat exchange gear and the condenser KA value synopsis of different chamber's external heat exchanger, to obtain closest to the 2nd KA value KAcneedHigher value, and it can be used as the original speed position of outdoor heat exchanger, simultaneously by (DWin1+ 2) as the initial wind shelves of final outdoor fan.
nullThat is，In an embodiment of the present invention，When in multiple on-line system startup start or multiple on-line system, the start capacity of indoor set changes，First total heat exchange amount Qc of the total heat exchange amount Qh and refrigeration indoor set that heat indoor set can be calculated，Then the power P com of compressor is estimated according to the operational mode of outdoor heat exchanger，The original speed position of outdoor heat exchanger and the initial wind shelves of outdoor fan are estimated finally according to result of calculation，With the original speed position according to outdoor heat exchanger, outdoor heat exchanger is carried out heat exchange control，The wind speed of outdoor fan is controlled by the initial wind shelves according to outdoor fan simultaneously，Thus accelerating the stable process of system，Avoid inside difference under load，It is difficult to the rotating speed judging the heat exchange area of outdoor heat exchanger and off-premises station blower fan，And need the system stability time caused by rotating speed progressively regulating heat exchange area and off-premises station blower fan according to system mode longer、The problem that high pressure is too high too low and efficiency is poor，Improve the comfortableness of user and the reliability of system.
The heat exchange control of outdoor heat exchanger in multiple on-line system according to embodiments of the present invention, when in multiple on-line system startup start or multiple on-line system, the start capacity of indoor set changes, the operational factor of each operational factor heating indoor set and each refrigeration indoor set being in open state being in open state in multiple indoor set is obtained by part flow arrangement, and the saturation temperature Tes corresponding with target back pressure for saturation temperature Tcs that the target exhaust pressure that obtains compressor is corresponding, and according to Tcs, Tes and be in the operational factor of the operational factor that open state each heat indoor set and each refrigeration indoor set being in open state and calculate the total heat exchange amount Qh heating indoor set and total heat exchange amount Qc of refrigeration indoor set.And, judge the operational mode of outdoor heat exchanger, and the power P com of the operational mode estimation compressor according to outdoor heat exchanger, and acquisition outdoor environment temperature, and the original speed position of the total heat exchange amount Qc estimation outdoor heat exchanger according to outdoor environment temperature, the operational mode of outdoor heat exchanger, the power P com of compressor, the total heat exchange amount Qh heating indoor set and refrigeration indoor set, according to the original speed position of outdoor heat exchanger, outdoor heat exchanger is carried out heat exchange control.Thus, can when the start volume change of system start-up start or indoor set, directly judge the original speed position of outdoor heat exchanger, the stable process of acceleration system, avoid the problem that system stability time length under Part load, high pressure are too high or too low, improve the comfortableness of user and the reliability of system.
Fig. 2 is the structural representation of multiple on-line system according to an embodiment of the invention.As in figure 2 it is shown, this multiple on-line system may include that multiple indoor set, off-premises station 20 and part flow arrangement 30.
Specifically, multiple indoor sets can include indoor set 1, indoor set 2 ..., indoor set M, and wherein M is positive integer.Off-premises station 20 includes outdoor controller 210, outdoor heat exchanger 220 and compressor 230, and outdoor heat exchanger 220 has multiple heat exchange gear, the corresponding heat exchange area of each heat exchange gear.
Part flow arrangement 30 obtains the operational factor of each operational factor heating indoor set and each refrigeration indoor set being in open state being in open state in multiple indoor set for the start capacity starting indoor set in start or multiple on-line system in multiple on-line system when changing, and the saturation temperature Tes corresponding with target back pressure for saturation temperature Tcs that the target exhaust pressure that obtains compressor is corresponding, and according to Tcs, Tes and be in the operational factor of the operational factor that open state each heat indoor set and each refrigeration indoor set being in open state and calculate the total heat exchange amount Qh heating indoor set and total heat exchange amount Qc of refrigeration indoor set.
Wherein, the each operational factor heating indoor set being in open state can include heating a number of indoor set, heat the aperture of restricting element in indoor set, heat indoor set rotation speed of fan, heat indoor set set static pressure, the return air dry bulb temperature heating indoor set and wet bulb temperature, the operational factor being in each refrigeration indoor set of open state can include the aperture of restricting element in a number of refrigeration indoor set, refrigeration indoor set, the rotation speed of fan of refrigeration indoor set, refrigeration indoor set set static pressure, the return air dry bulb temperature of refrigeration indoor set and wet bulb temperature.
According to one embodiment of present invention, part flow arrangement 30 according to Tcs and be in open state each heat the operational factor of indoor set calculate the total heat exchange amount Qh heating indoor set time, first part flow arrangement 30 calculates according to Tcs and heats the first temperature value T1 that indoor set is corresponding, for example, it is possible to make the first temperature value T1=Tcs-2；Further, part flow arrangement 30 is according to heating the rotation speed of fan ri of indoor set and heating setting static pressure SPi calculating blower fan air output Si=f1 (ri, SPi) of indoor set, and wherein, i is the number heating indoor set being in open state；Then, part flow arrangement 30 is according to the high pressure P S1 of part flow arrangement 30, middle pressure PS2, the blower fan air output Si of part flow arrangement 30 and heats the aperture EEVi of restricting element in indoor set and calculates and heat the KA value KAi=g1 (△ P1, EEVi, Si) of indoor set, wherein, △ P1=PS1-PS2；Finally, part flow arrangement 30 according to blower fan air output Si, heat the KA value KAi of indoor set, the first temperature value T1 and heat the return air dry bulb temperature ti of indoor set and calculate and heat total heat exchange amount Qh=Σ [KAi*Si* (T1-ti)] of indoor set.
Further, part flow arrangement 30 is when the operational factor according to Tes and each refrigeration indoor set being in open state calculates total heat exchange amount Qc of refrigeration indoor set, first part flow arrangement 30 calculates, according to Tes, the second temperature value T2 that refrigeration indoor set is corresponding, for example, it is possible to make the second temperature value T2=Tes+2；Further, part flow arrangement 30 calculates blower fan air output Sj=f2 (rj, SPj) according to the rotation speed of fan rj of refrigeration indoor set and the setting static pressure SPj of refrigeration indoor set, and wherein, j is the number of the refrigeration indoor set being in open state；Then, part flow arrangement 30 presses the aperture EEVj of restricting element in PS2, blower fan air output Sj and refrigeration indoor set to calculate the KA value KAj=g2 (△ P2, EEVj, Sj) of refrigeration indoor set according to the low pressure PS3 of part flow arrangement 30, the middle of part flow arrangement 30, wherein, △ P2=PS2-PS3；Finally, part flow arrangement 30 calculates total heat exchange amount Qc=Σ [KAj*Sj* (tdj-T2)] of refrigeration indoor set according to the wet bulb temperature tdj of blower fan air output Sj, the refrigeration KA value KAj of indoor set, the second temperature value T2 and refrigeration indoor set.
It should be noted that when without humidity data, it can be assumed that indoor air relative humidity is 60%, and according to indoor air relative humidity, wet bulb temperature tdj is estimated.
Specifically, outdoor controller 210 is for judging the operational mode of outdoor heat exchanger 220, and the power P com of the operational mode estimation compressor 230 according to outdoor heat exchanger 220, wherein, the operational mode of outdoor heat exchanger 220 includes evaporator mode and condenser modes.
According to one embodiment of present invention, when outdoor controller 210 estimates the power P com of compressor 230 according to the operational mode of outdoor heat exchanger 220, when outdoor heat exchanger 220 runs with evaporator mode, outdoor controller 210 estimates the power P com=f3 (ti of compressor 230 according to each rated power Pei and return air dry bulb temperature ti heating indoor set being in open state, Pei), wherein, i is the number heating indoor set being in open state；When outdoor heat exchanger 220 runs with condenser modes, outdoor controller 210 estimates the power P com=g3 (tj of compressor 230 according to the rated power Pej and return air dry bulb temperature tj of each refrigeration indoor set being in open state, Pej), wherein, j is the number of the refrigeration indoor set being in open state.
Further, outdoor controller 210 is when estimating the power P com of compressor 230, if off-premises station 20 is in start-up phase, outdoor controller 210 then judges that whether (Qc-Qh)/Qstd is more than the first preset value A1, wherein, Qstd is the nominal refrigerating capacity value of off-premises station 20, if (Qc-Qh)/Qstd is > A1, outdoor controller 210 then control room external heat exchanger 220 starts with condenser modes；If (Qc-Qh)/Qstd≤A1, outdoor controller 210 then control room external heat exchanger 220 starts with evaporator mode.
It is to say, when outdoor controller 210 estimates the power P com of compressor 230, first determine whether whether off-premises station 20 is in start-up phase.If off-premises station 20 is in start-up phase, then outdoor controller 210 first judges the start-up mode of outdoor heat exchanger 220 according to total heat exchange amount Qc and the total heat exchange amount Qh heating indoor set of refrigeration indoor set.Namely, as (Qc-Qh)/Qstd > A1, outdoor controller 210 control room external heat exchanger 220 starts with condenser modes；As (Qc-Qh)/Qstd≤A1, outdoor controller 210 control room external heat exchanger 220 starts with evaporator mode.
And if off-premises station 20 is already powered on completes, then can omit the judgement of start-up mode to off-premises station 20, directly estimate the power P com of compressor 230 according to the present mode of operation of off-premises station 20.When outdoor heat exchanger 220 runs with evaporator mode, the power of compressor 230 can be Pcom=B2* Σ ((B1-ti) * Pei/Qstd1) * Pstd, wherein, B1, B2 are experimental fit coefficient of association, ti is each return air dry bulb temperature heating indoor set being in open state, Pei is each rated power heating indoor set being in open state, Qstd1 is each nominal refrigerating capacity value heating indoor set being in open state, and Pstd is the rated power of off-premises station.Further, if the minimum power Pmin that the power P com of the compressor 230 of estimation allows less than compressor 230, then Pcom is taken equal to minimum power Pmin；If the peak power Pmax that the power P com of the compressor 230 of estimation allows more than compressor 230, then take Pcom equal to peak power Pmax.And when outdoor heat exchanger 220 runs with condenser modes, the power of compressor 230 can be Pcom=B4* Σ ((tj-B3) * Pej/Qstd2) * Pstd, wherein, B3, B4 are experimental fit coefficient of association, Pej is the rated power of each refrigeration indoor set being in open state, tj is the return air dry bulb temperature of each refrigeration indoor set being in open state, Qstd2 is the nominal refrigerating capacity value of each refrigeration indoor set being in open state, and Pstd is the rated power of off-premises station.Further, if the power P com of the compressor 230 of estimation is less than minimum power Pmin, then Pcom is taken equal to minimum power Pmin；If the power P com of the compressor 230 of estimation is more than peak power Pmax, then take Pcom equal to peak power Pmax.
Specifically, outdoor controller 210 is additionally operable to obtain outdoor environment temperature, and estimate the original speed position of outdoor heat exchanger 220 according to total heat exchange amount Qc of outdoor environment temperature, the operational mode of outdoor heat exchanger 220, the power P com of compressor 230, the total heat exchange amount Qh heating indoor set and refrigeration indoor set, and outdoor heat exchanger 220 carries out heat exchange control by the original speed position according to outdoor heat exchanger 220.
According to one embodiment of present invention, when outdoor controller 210 estimates the original speed position of outdoor heat exchanger 220 according to total heat exchange amount Qc of outdoor environment temperature, the operational mode of outdoor heat exchanger 220, the power P com of compressor 230, the total heat exchange amount Qh heating indoor set and refrigeration indoor set, when outdoor heat exchanger 220 runs with evaporator mode, outdoor controller 210 obtains outdoor fan air quantity So1 corresponding when outdoor fan runs with the most strong wind shelves allowed；Further, outdoor controller 210 according to outdoor fan air quantity So1, by the calculated second temperature value T2 of Tes, outdoor environment temperature tamb, heat the KA value KAe to reach of power P com counting chamber external heat exchanger 220 of total heat exchange amount Qh of indoor set, refrigeration total heat exchange amount Qc of indoor set, compressor 230need=(Qh-Qc-Pcom)/[So1* (tamb-T2)]；And outdoor controller 210 is according to a KA value KAeneedObtain the estimation gear of outdoor heat exchanger 220 original speed position of the estimation gear counting chamber external heat exchanger 220 according to outdoor heat exchanger 220.
For example, it is possible in advance by the vaporizer KA value corresponding to the heat exchange gear of outdoor heat exchangers different under standard condition, and outdoor fan air quantity correspondence corresponding to the wind shelves of outdoor fan is stored in outdoor controller 210.When outdoor heat exchanger 220 runs with evaporator mode, allow the most strong wind shelves of outdoor fan that run as the initial wind shelves of current outdoor blower fan, i.e. DW under current environmentin1=DWmax, then inquire about wind shelves and the outdoor fan air quantity synopsis of outdoor fan, to obtain the initial wind shelves DW of outdoor fanin1Corresponding outdoor fan air quantity So1.Outdoor controller 210 according to the outdoor fan air quantity So1 obtained, the second temperature value T2, outdoor environment temperature tamb, heat the KA value KAe to reach of power P com counting chamber external heat exchanger 220 of total heat exchange amount Qh of indoor set, refrigeration total heat exchange amount Qc of indoor set, compressorneed=(Qh-Qc-Pcom)/[So1* (tamb-T2)], and inquire about heat exchange gear and the vaporizer KA value synopsis of different chamber's external heat exchanger 220, to obtain closest to a KA value KAeneedHigher value, and it can be used as the original speed position of outdoor heat exchanger 220, simultaneously by (DWin1-2) as the initial wind shelves of final outdoor fan.
Further, when outdoor controller 210 estimates the original speed position of outdoor heat exchanger 220 according to total heat exchange amount Qc of outdoor environment temperature, the operational mode of outdoor heat exchanger 220, the power P com of compressor 230, the total heat exchange amount Qh heating indoor set and refrigeration indoor set, when outdoor heat exchanger 220 runs with condenser modes, outdoor controller 210 obtains outdoor fan air quantity So2 corresponding when outdoor fan runs with the minimum wind shelves allowed；Further, outdoor controller 210 according to outdoor fan air quantity So2, by the calculated first temperature value T1 of Tcs, outdoor environment temperature tamb, heat the 2nd KA value KAc to reach of power P com counting chamber external heat exchanger 220 of total heat exchange amount Qh of indoor set, refrigeration total heat exchange amount Qc of indoor set, compressor 230need=(Qc+Pcom-Qh)/[So2* (T1-tamb)]；And outdoor controller 210 is according to the 2nd KA value KAcneedObtain the estimation gear of outdoor heat exchanger 220 original speed position of the estimation gear counting chamber external heat exchanger 220 according to outdoor heat exchanger 220.
For example, it is possible in advance by the condenser KA value corresponding to the heat exchange gear of outdoor heat exchangers different under standard condition, and outdoor fan air quantity correspondence corresponding to the wind shelves of outdoor fan is stored in outdoor controller 210.When outdoor heat exchanger 220 runs with condenser modes, allow the minimum wind shelves of outdoor fan that run as the initial wind shelves of current outdoor blower fan, i.e. DW under current environmentin1=DWmin, then inquire about wind shelves and the outdoor fan air quantity synopsis of outdoor fan, to obtain the initial wind shelves DW of outdoor fanin1Corresponding outdoor fan air quantity So2.Outdoor controller 210 according to the outdoor fan air quantity So2 obtained, the first temperature value T1, outdoor environment temperature tamb, heat the 2nd KA value KAc to reach of power P com counting chamber external heat exchanger 220 of total heat exchange amount Qh of indoor set, refrigeration total heat exchange amount Qc of indoor set, compressorneed=(Qc+Pcom-Qh)/[So2* (T1-tamb)], and inquire about heat exchange gear and the condenser KA value synopsis of different chamber's external heat exchanger 220, to obtain closest to the 2nd KA value KAcneedHigher value, and it can be used as the original speed position of outdoor heat exchanger 220, simultaneously by (DWin1+ 2) as the initial wind shelves of final outdoor fan.
nullThat is，In an embodiment of the present invention，When in multiple on-line system startup start or multiple on-line system, the start capacity of indoor set changes，First total heat exchange amount Qc of the total heat exchange amount Qh and refrigeration indoor set that heat indoor set can be calculated，Then the power P com of compressor 230 is estimated according to the operational mode of outdoor heat exchanger 220，The original speed position of outdoor heat exchanger 220 and the initial wind shelves of outdoor fan are estimated finally according to result of calculation，With the original speed position according to outdoor heat exchanger 220, outdoor heat exchanger 220 is carried out heat exchange control，The wind speed of outdoor fan is controlled by the initial wind shelves according to outdoor fan simultaneously，Thus accelerating the stable process of system，Avoid inside difference under load，It is difficult to the rotating speed judging the heat exchange area of outdoor heat exchanger and off-premises station blower fan，And need the system stability time caused by rotating speed progressively regulating heat exchange area and off-premises station blower fan according to system mode longer、The problem that high pressure is too high too low and efficiency is poor，Improve the comfortableness of user and the reliability of system.
So that those skilled in the art can clearly understand the present invention, illustrate below in conjunction with Fig. 3.
The heat exchange that Fig. 3 is the outdoor heat exchanger in multiple on-line system according to an embodiment of the invention controls process flow diagram flow chart.Comprise the following steps as it is shown on figure 3, this heat exchange controls process:
S301, multiple on-line system starts the start capacity of indoor set in start or multiple on-line system and changes.
S302, calculates the total heat exchange amount Qh heating indoor set and total heat exchange amount Qc of refrigeration indoor set, and concrete calculating process is it has been observed that repeat no more here.
S303, it may be judged whether (Qc-Qh)/Qstd > A1.If it is, perform step S304；If it does not, perform step S310.If it should be noted that off-premises station 20 is already powered on complete, then skipping this step.
S304, outdoor heat exchanger starts with condenser modes.
S305, the power P com=g3 (tj, Pej) of estimation compressor, concrete calculating process is it has been observed that repeat no more here.
S306, allows the minimum wind shelves initial wind shelves as current outdoor blower fan of operation, i.e. DW under current environmentin1=DWmin。
S307, the 2nd KA value KAc that counting chamber external heat exchanger to reachneed, concrete calculating process is it has been observed that repeat no more here.
S308, near KAcneedThe estimation gear that higher value is outdoor heat exchanger, i.e. the original speed position of outdoor heat exchanger.
S309, (DWin1+ 2) as the initial wind shelves of final outdoor fan.
S310, outdoor heat exchanger starts with evaporator mode.
S311, the power P com=f3 (ti, Pei) of estimation compressor, concrete calculating process is it has been observed that repeat no more here.
S312, allows the most strong wind shelves that run as the initial wind shelves of current outdoor blower fan, i.e. DW under current environmentin1=DWmax。
S313, the KA value KAe that counting chamber external heat exchanger to reachneed, concrete calculating process is it has been observed that repeat no more here.
S314, near KAeneedThe estimation gear that higher value is outdoor heat exchanger, i.e. the original speed position of outdoor heat exchanger.
S315, (DWin1-2) as the initial wind shelves of final outdoor fan.
nullMultiple on-line system according to embodiments of the present invention，Start the capacity of starting shooting of indoor set in start or multiple on-line system by part flow arrangement in multiple on-line system and when changing, obtain the operational factor of each operational factor heating indoor set and each refrigeration indoor set being in open state being in open state in multiple indoor set，And the saturation temperature Tes corresponding with target back pressure for saturation temperature Tcs that the target exhaust pressure that obtains compressor is corresponding，And according to Tcs、Tes and be in the operational factor of the operational factor that open state each heat indoor set and each refrigeration indoor set being in open state and calculate the total heat exchange amount Qh heating indoor set and total heat exchange amount Qc of refrigeration indoor set，And，The operational mode of outdoor heat exchanger is judged by outdoor controller，And the power P com of the operational mode estimation compressor according to outdoor heat exchanger，And obtain outdoor environment temperature also by outdoor controller，And according to outdoor environment temperature、The operational mode of outdoor heat exchanger、The power P com of compressor、Total heat exchange amount Qc of the total heat exchange amount Qh and refrigeration indoor set that heat indoor set estimates the original speed position of outdoor heat exchanger，And according to the original speed position of outdoor heat exchanger outdoor heat exchanger carried out heat exchange control.Thus, can when the start volume change of system start-up start or indoor set, directly judge the original speed position of outdoor heat exchanger, the stable process of acceleration system, avoid the problem that system stability time length under Part load, high pressure are too high or too low, improve the comfortableness of user and the reliability of system.
In describing the invention, it will be appreciated that, term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width ", " thickness ", " on ", D score, " front ", " afterwards ", " left side ", " right side ", " vertically ", " level ", " top ", " end " " interior ", " outward ", " clockwise ", " counterclockwise ", " axially ", " radially ", orientation or the position relationship of the instruction such as " circumference " are based on orientation shown in the drawings or position relationship, it is for only for ease of the description present invention and simplifies description, rather than the device of instruction or hint indication or element must have specific orientation, with specific azimuth configuration and operation, therefore it is not considered as limiting the invention.
Additionally, term " first ", " second " are only for descriptive purposes, and it is not intended that indicate or imply relative importance or the implicit quantity indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can express or implicitly include at least one this feature.In describing the invention, " multiple " are meant that at least two, for instance two, three etc., unless otherwise expressly limited specifically.
In the present invention, unless otherwise clearly defined and limited, the term such as term " installation ", " being connected ", " connection ", " fixing " should be interpreted broadly, for instance, it is possible to it is fixing connection, it is also possible to be removably connect, or integral；Can be mechanically connected, it is also possible to be electrical connection；Can be joined directly together, it is also possible to be indirectly connected to by intermediary, it is possible to be connection or the interaction relationship of two elements of two element internals, unless otherwise clear and definite restriction.For the ordinary skill in the art, it is possible to understand above-mentioned term concrete meaning in the present invention as the case may be.
In the present invention, unless otherwise clearly defined and limited, fisrt feature second feature " on " or D score can be that the first and second features directly contact, or the first and second features are by intermediary mediate contact.And, fisrt feature second feature " on ", " top " and " above " but fisrt feature directly over second feature or oblique upper, or be merely representative of fisrt feature level height higher than second feature.Fisrt feature second feature " under ", " lower section " and " below " can be fisrt feature immediately below second feature or obliquely downward, or be merely representative of fisrt feature level height less than second feature.
In the description of this specification, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiments ", " example ", " concrete example " or " some examples " etc. means in conjunction with this embodiment or example describe are contained at least one embodiment or the example of the present invention.In this manual, the schematic representation of above-mentioned term is necessarily directed to identical embodiment or example.And, the specific features of description, structure, material or feature can combine in one or more embodiments in office or example in an appropriate manner.Additionally, when not conflicting, the feature of the different embodiments described in this specification or example and different embodiment or example can be carried out combining and combining by those skilled in the art.
Although above it has been shown and described that embodiments of the invention, it is understandable that, above-described embodiment is illustrative of, it is impossible to be interpreted as limitation of the present invention, and above-described embodiment can be changed, revises, replace and modification by those of ordinary skill in the art within the scope of the invention.

Claims (16)

1. the heat exchange control of outdoor heat exchanger in a multiple on-line system, it is characterized in that, described multiple on-line system includes off-premises station, multiple indoor set and part flow arrangement, described off-premises station includes compressor and described outdoor heat exchanger, described outdoor heat exchanger has multiple heat exchange gear, the corresponding heat exchange area of each heat exchange gear, said method comprising the steps of:
When in the startup start of described multiple on-line system or described multiple on-line system, the start capacity of indoor set changes, described part flow arrangement obtains in the plurality of indoor set each operational factor heating indoor set being in open state and is in the operational factor of each refrigeration indoor set of open state, and the saturation temperature Tes corresponding with target back pressure for saturation temperature Tcs that the target exhaust pressure that obtains described compressor is corresponding；
According to Tcs, Tes and be in open state each operational factor heating indoor set and be in open state each refrigeration indoor set operational factor calculate heat indoor set total heat exchange amount Qh and refrigeration indoor set total heat exchange amount Qc；
Judging the operational mode of described outdoor heat exchanger the power P com of the operational mode described compressor of estimation according to described outdoor heat exchanger, wherein, the operational mode of described outdoor heat exchanger includes evaporator mode and condenser modes；
Obtain outdoor environment temperature, and estimate the original speed position of described outdoor heat exchanger according to total heat exchange amount Qc of described outdoor environment temperature, the operational mode of described outdoor heat exchanger, the power P com of described compressor, the total heat exchange amount Qh heating indoor set and refrigeration indoor set, and described outdoor heat exchanger carries out heat exchange control by the original speed position according to described outdoor heat exchanger.
2. the heat exchange control of outdoor heat exchanger in multiple on-line system as claimed in claim 1, it is characterized in that, the described each operational factor heating indoor set being in open state includes heating a number of indoor set, heat the aperture of restricting element in indoor set, heat the rotation speed of fan of indoor set, heat the setting static pressure of indoor set, heat return air dry bulb temperature and the wet bulb temperature of indoor set, the operational factor of the described each refrigeration indoor set being in open state includes a number of refrigeration indoor set, the aperture of restricting element in refrigeration indoor set, the rotation speed of fan of refrigeration indoor set, the setting static pressure of refrigeration indoor set, the return air dry bulb temperature of refrigeration indoor set and wet bulb temperature.
3. the heat exchange control of outdoor heat exchanger in multiple on-line system as claimed in claim 2, it is characterized in that, according to Tcs, Tes and be in open state each operational factor heating indoor set and be in open state each refrigeration indoor set operational factor calculate heat indoor set total heat exchange amount Qh and refrigeration indoor set total heat exchange amount Qc, including:
Calculate according to Tcs and heat the first temperature value T1 that indoor set is corresponding, and calculate, according to Tes, the second temperature value T2 that refrigeration indoor set is corresponding；
According to heating the rotation speed of fan ri of indoor set and heating setting static pressure SPi calculating blower fan air output Si=f1 (ri, SPi) of indoor set, wherein, i is the number heating indoor set being in open state；
Obtain the high pressure P S1 and middle pressure PS2 of part flow arrangement, and according to described high pressure P S1, medium pressure PS2, described blower fan air output Si with heat the aperture EEVi of restricting element in indoor set and calculate and heat KA value KAi=g1 (the Δ P1 of indoor set, EEVi, Si), wherein, Δ P1=PS1-PS2；
According to described blower fan air output Si, heat the KA value KAi of indoor set, described first temperature value T1 and heat the return air dry bulb temperature ti of indoor set and calculate and heat total heat exchange amount Qh=Σ [KAi*Si* (T1-ti)] of indoor set.
4. the heat exchange control of outdoor heat exchanger in multiple on-line system as claimed in claim 3, it is characterized in that, according to Tcs, Tes and be in open state each operational factor heating indoor set and be in open state each refrigeration indoor set operational factor calculate heat indoor set total heat exchange amount Qh and refrigeration indoor set total heat exchange amount Qc, also include:
Rotation speed of fan rj and the setting static pressure SPj of refrigeration indoor set according to refrigeration indoor set calculate blower fan air output Sj=f2 (rj, SPj), and wherein, j is the number of the refrigeration indoor set being in open state；
Obtain the middle pressure PS2 and low pressure PS3 of part flow arrangement, and calculate KA value KAj=g2 (the Δ P2 of refrigeration indoor set according to the aperture EEVj of restricting element in described low pressure PS3, medium pressure PS2, described blower fan air output Sj and refrigeration indoor set, EEVj, Sj), wherein, Δ P2=PS2-PS3；
Wet bulb temperature tdj according to described blower fan air output Sj, the refrigeration KA value KAj of indoor set, described second temperature value T2 and refrigeration indoor set calculates total heat exchange amount Qc=Σ [KAj*Sj* (tdj-T2)] of refrigeration indoor set.
5. the heat exchange control of outdoor heat exchanger in multiple on-line system as claimed in claim 1, it is characterised in that estimate the power P com of described compressor according to the operational mode of described outdoor heat exchanger, including:
When described outdoor heat exchanger runs with evaporator mode, power P com=f3 (the ti of described compressor is estimated according to each rated power Pei and return air dry bulb temperature ti heating indoor set being in open state, Pei), wherein, i is the number heating indoor set being in open state；
When described outdoor heat exchanger runs with condenser modes, rated power Pej and return air dry bulb temperature tj according to each refrigeration indoor set being in open state estimates the power P com=g3 (tj of described compressor, Pej), wherein, j is the number of the refrigeration indoor set being in open state.
6. the heat exchange control of outdoor heat exchanger in multiple on-line system as claimed in claim 1, it is characterized in that, when estimating the power P com of described compressor, if described off-premises station is in start-up phase, then judge that whether (Qc-Qh)/Qstd is more than the first preset value A1, wherein, Qstd is the nominal refrigerating capacity value of described off-premises station
If (Qc-Qh)/Qstd > A1, then control described outdoor heat exchanger and start with condenser modes；
If (Qc-Qh)/Qstd≤A1, then control described outdoor heat exchanger and start with evaporator mode.
7. the heat exchange control of outdoor heat exchanger in the multiple on-line system as according to any one of claim 1-6, it is characterized in that, total heat exchange amount Qc according to described outdoor environment temperature, the operational mode of described outdoor heat exchanger, the power P com of described compressor, the total heat exchange amount Qh heating indoor set and refrigeration indoor set estimates the original speed position of described outdoor heat exchanger, including:
When described outdoor heat exchanger runs with evaporator mode, obtain outdoor fan air quantity So1 corresponding when outdoor fan runs with the most strong wind shelves allowed；
According to outdoor fan air quantity So1, by the calculated second temperature value T2 of Tes, described outdoor environment temperature tamb, described in heat total heat exchange amount Qh of indoor set, total heat exchange amount Qc of described refrigeration indoor set, described compressor power P com calculate the KA value KAe to reach of described outdoor heat exchangerneed=(Qh-Qc-Pcom)/[So1* (tamb-T2)]；
According to a described KA value KAeneedObtain the estimation gear of described outdoor heat exchanger the original speed position of the estimation gear described outdoor heat exchanger of calculating according to described outdoor heat exchanger.
8. the heat exchange control of outdoor heat exchanger in multiple on-line system as claimed in claim 7, it is characterized in that, total heat exchange amount Qc according to described outdoor environment temperature, the operational mode of described outdoor heat exchanger, the power P com of described compressor, the total heat exchange amount Qh heating indoor set and refrigeration indoor set estimates the original speed position of described outdoor heat exchanger, also includes:
When described outdoor heat exchanger runs with condenser modes, obtain outdoor fan air quantity So2 corresponding when described outdoor fan runs with the minimum wind shelves allowed；
According to outdoor fan air quantity So2, by the calculated first temperature value T1 of Tcs, described outdoor environment temperature tamb, described in heat total heat exchange amount Qh of indoor set, total heat exchange amount Qc of described refrigeration indoor set, described compressor power P com calculate the 2nd KA value KAc to reach of described outdoor heat exchangerneed=(Qc+Pcom-Qh)/[So2* (T1-tamb)]；
According to described 2nd KA value KAcneedObtain the estimation gear of described outdoor heat exchanger the original speed position of the estimation gear described outdoor heat exchanger of calculating according to described outdoor heat exchanger.
9. a multiple on-line system, it is characterised in that including:
Multiple indoor sets；
Off-premises station, described off-premises station includes outdoor controller, outdoor heat exchanger and compressor, and described outdoor heat exchanger has multiple heat exchange gear, the corresponding heat exchange area of each heat exchange gear；
Part flow arrangement, described part flow arrangement starts the capacity of starting shooting of indoor set in start or described multiple on-line system and obtains the operational factor of each operational factor heating indoor set and each refrigeration indoor set being in open state being in open state in the plurality of indoor set when changing in described multiple on-line system, and the saturation temperature Tes corresponding with target back pressure for saturation temperature Tcs that the target exhaust pressure that obtains described compressor is corresponding, and according to Tcs, Tes and be in the operational factor of the operational factor that open state each heat indoor set and each refrigeration indoor set being in open state and calculate the total heat exchange amount Qh heating indoor set and total heat exchange amount Qc of refrigeration indoor set, and,
Described outdoor controller is for judging the operational mode of described outdoor heat exchanger, and the power P com of the operational mode described compressor of estimation according to described outdoor heat exchanger, and wherein, the operational mode of described outdoor heat exchanger includes evaporator mode and condenser modes；
Described outdoor controller is additionally operable to obtain outdoor environment temperature, and estimate the original speed position of described outdoor heat exchanger according to total heat exchange amount Qc of described outdoor environment temperature, the operational mode of described outdoor heat exchanger, the power P com of described compressor, the total heat exchange amount Qh heating indoor set and refrigeration indoor set, and described outdoor heat exchanger carries out heat exchange control by the original speed position according to described outdoor heat exchanger.
10. multiple on-line system as claimed in claim 9, it is characterized in that, the described each operational factor heating indoor set being in open state includes heating a number of indoor set, heat the aperture of restricting element in indoor set, heat the rotation speed of fan of indoor set, heat the setting static pressure of indoor set, heat return air dry bulb temperature and the wet bulb temperature of indoor set, the operational factor of the described each refrigeration indoor set being in open state includes a number of refrigeration indoor set, the aperture of restricting element in refrigeration indoor set, the rotation speed of fan of refrigeration indoor set, the setting static pressure of refrigeration indoor set, the return air dry bulb temperature of refrigeration indoor set and wet bulb temperature.
11. multiple on-line system as claimed in claim 10, it is characterized in that, described part flow arrangement according to Tcs, Tes and be in open state each operational factor heating indoor set and be in open state each refrigeration indoor set operational factor calculate heat indoor set total heat exchange amount Qh and refrigeration indoor set total heat exchange amount Qc time, wherein
Described part flow arrangement calculates according to Tcs and heats the first temperature value T1 that indoor set is corresponding, and calculates, according to Tes, the second temperature value T2 that refrigeration indoor set is corresponding；
Described part flow arrangement is according to heating the rotation speed of fan ri of indoor set and heating setting static pressure SPi calculating blower fan air output Si=f1 (ri, SPi) of indoor set, and wherein, i is the number heating indoor set being in open state；
Described part flow arrangement is according to the high pressure P S1 of described part flow arrangement, middle pressure PS2, the described blower fan air output Si of described part flow arrangement and heats the aperture EEVi of restricting element in indoor set and calculates and heat KA value KAi=g1 (the Δ P1 of indoor set, EEVi, Si), wherein, Δ P1=PS1-PS2；
Described part flow arrangement according to described blower fan air output Si, heat the KA value KAi of indoor set, described first temperature value T1 and heat the return air dry bulb temperature ti of indoor set and calculate and heat total heat exchange amount Qh=Σ [KAi*Si* (T1-ti)] of indoor set.
12. multiple on-line system as claimed in claim 11, it is characterized in that, described part flow arrangement according to Tcs, Tes and be in open state each operational factor heating indoor set and be in open state each refrigeration indoor set operational factor calculate heat indoor set total heat exchange amount Qh and refrigeration indoor set total heat exchange amount Qc time, wherein
Described part flow arrangement calculates blower fan air output Sj=f2 (rj, SPj) always according to the rotation speed of fan rj of refrigeration indoor set and the setting static pressure SPj of refrigeration indoor set, and wherein, j is the number of the refrigeration indoor set being in open state；
And, described part flow arrangement presses the aperture EEVj of restricting element in PS2, described blower fan air output Sj and refrigeration indoor set to calculate KA value KAj=g2 (the Δ P2 of refrigeration indoor set according to the low pressure PS3 of described part flow arrangement, the middle of described part flow arrangement, EEVj, Sj), wherein, Δ P2=PS2-PS3；
And, described part flow arrangement calculates total heat exchange amount Qc=Σ [KAj*Sj* (tdj-T2)] of refrigeration indoor set according to the wet bulb temperature tdj of described blower fan air output Sj, the refrigeration KA value KAj of indoor set, described second temperature value T2 and refrigeration indoor set.
13. multiple on-line system as claimed in claim 9, it is characterised in that when described outdoor controller estimates the power P com of described compressor according to the operational mode of described outdoor heat exchanger,
When described outdoor heat exchanger runs with evaporator mode, described outdoor controller estimates the power P com=f3 (ti of described compressor according to each rated power Pei and return air dry bulb temperature ti heating indoor set being in open state, Pei), wherein, i is the number heating indoor set being in open state；
When described outdoor heat exchanger runs with condenser modes, described outdoor controller estimates the power P com=g3 (tj of described compressor according to the rated power Pej and return air dry bulb temperature tj of each refrigeration indoor set being in open state, Pej), wherein, j is the number of the refrigeration indoor set being in open state.
14. multiple on-line system as claimed in claim 9, it is characterized in that, when estimating the power P com of described compressor, if described off-premises station is in start-up phase, described outdoor controller then judges that whether (Qc-Qh)/Qstd is more than the first preset value A1, wherein, Qstd is the nominal refrigerating capacity value of described off-premises station
If (Qc-Qh)/Qstd > A1, described outdoor controller then controls described outdoor heat exchanger and starts with condenser modes；
If (Qc-Qh)/Qstd≤A1, described outdoor controller then controls described outdoor heat exchanger and starts with evaporator mode.
15. the multiple on-line system as according to any one of claim 9-14, it is characterized in that, when described outdoor controller estimates the original speed position of described outdoor heat exchanger according to total heat exchange amount Qc of described outdoor environment temperature, the operational mode of described outdoor heat exchanger, the power P com of described compressor, the total heat exchange amount Qh heating indoor set and refrigeration indoor set, wherein
When described outdoor heat exchanger runs with evaporator mode, described outdoor controller obtains outdoor fan air quantity So1 corresponding when outdoor fan runs with the most strong wind shelves allowed；
Further, described outdoor controller according to outdoor fan air quantity So1, by the calculated second temperature value T2 of Tes, described outdoor environment temperature tamb, described in heat total heat exchange amount Qh of indoor set, total heat exchange amount Qc of described refrigeration indoor set, described compressor power P com calculate the KA value KAe to reach of described outdoor heat exchangerneed=(Qh-Qc-Pcom)/[So1* (tamb-T2)]；
And, described outdoor controller is according to a described KA value KAeneedObtain the estimation gear of described outdoor heat exchanger the original speed position of the estimation gear described outdoor heat exchanger of calculating according to described outdoor heat exchanger.
16. multiple on-line system as claimed in claim 15, it is characterized in that, when described outdoor controller estimates the original speed position of described outdoor heat exchanger according to total heat exchange amount Qc of described outdoor environment temperature, the operational mode of described outdoor heat exchanger, the power P com of described compressor, the total heat exchange amount Qh heating indoor set and refrigeration indoor set, wherein
When described outdoor heat exchanger runs with condenser modes, described outdoor controller obtains outdoor fan air quantity So2 corresponding when described outdoor fan runs with the minimum wind shelves allowed；
Further, described outdoor controller according to outdoor fan air quantity So2, by the calculated first temperature value T1 of Tcs, described outdoor environment temperature tamb, described in heat total heat exchange amount Qh of indoor set, total heat exchange amount Qc of described refrigeration indoor set, described compressor power P com calculate the 2nd KA value KAc to reach of described outdoor heat exchangerneed=(Qc+Pcom-Qh)/[So2* (T1-tamb)]；
And, described outdoor controller is according to described 2nd KA value KAcneedObtain the estimation gear of described outdoor heat exchanger the original speed position of the estimation gear described outdoor heat exchanger of calculating according to described outdoor heat exchanger.
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