CN108105912B - Multi-line system and its anti-refrigerant bias current control method, control device - Google Patents

Multi-line system and its anti-refrigerant bias current control method, control device Download PDF

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Publication number
CN108105912B
CN108105912B CN201711308694.5A CN201711308694A CN108105912B CN 108105912 B CN108105912 B CN 108105912B CN 201711308694 A CN201711308694 A CN 201711308694A CN 108105912 B CN108105912 B CN 108105912B
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China
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indoor unit
outdoor
aperture
indoor
degree
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CN108105912A (en
Inventor
颜利波
王命仁
谭志军
杨国忠
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Midea Group Co Ltd
GD Midea Heating and Ventilating Equipment Co Ltd
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Midea Group Co Ltd
GD Midea Heating and Ventilating Equipment Co Ltd
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
    • F24F5/0003—Exclusively-fluid systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/30—Arrangement or mounting of heat-exchangers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B13/00—Compression machines, plants or systems, with reversible cycle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/30—Expansion means; Dispositions thereof
    • F25B41/31—Expansion valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B49/00—Arrangement or mounting of control or safety devices
    • F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

Abstract

The invention discloses a kind of multi-line system and its anti-refrigerant bias current control methods, control device, the control method obtains the degree of superheat for the indoor unit that freezes in multiple indoor units and the degree of supercooling of heating indoor unit the following steps are included: when multi-line system is with the operation of hybrid refrigeration heating mode respectively；Obtain the working condition of each outdoor heat exchanger；It is adjusted according to aperture of the degree of supercooling of the working condition of each outdoor heat exchanger, the degree of superheat of refrigeration indoor unit and heating indoor unit at least one of multiple outdoor restricting elements and multiple indoor restricting elements, so as to effectively avoid the problem that refrigeration indoor unit because of refrigerating capacity deficiency or time liquid caused by lacking refrigerant or more refrigerants.

Description

Multi-line system and its anti-refrigerant bias current control method, control device
Technical field
The present invention relates to air-conditioning technical field, in particular to the anti-refrigerant bias current control method of a kind of multi-line system, one The anti-refrigerant bias current control device of kind multi-line system and a kind of multi-line system with the anti-refrigerant bias current control device.
Background technique
When Three-pipe heat recovery multi-connected machine system is with the operation of hybrid refrigeration heating mode, it is easy to happen Biased flow phenomenon, is led Machine lacks refrigerant perhaps more refrigerants and causing freezes interior mechanism cold scarce capacity or the problem of return liquid in causing to freeze, still, existing Some control methods not yet very good solution problem.
Summary of the invention
The present invention is directed at least solve one of the technical problem in above-mentioned technology to a certain extent.For this purpose, of the invention First purpose is to propose a kind of anti-refrigerant bias current control method of multi-line system, by outdoor restricting element and interior The aperture of restricting element is rationally adjusted, and can effectively avoid refrigeration indoor unit because making caused by lacking refrigerant or more refrigerants Cold scarce capacity or return liquid the problem of.
Second object of the present invention is to propose a kind of computer readable storage medium.Third object of the present invention exists In the anti-refrigerant bias current control device for proposing a kind of multi-line system.Fourth object of the present invention is to propose a kind of multi-connected machine System.
In order to achieve the above objectives, first aspect present invention embodiment proposes a kind of anti-refrigerant bias current control of multi-line system Method processed, the multi-line system include outdoor unit, multiple indoor units and part flow arrangement, and the outdoor unit includes the first four-way Valve, multiple outdoor heat exchangers, the second four-way valve being correspondingly arranged respectively with each outdoor heat exchanger, respectively with each outdoor heat exchange The outdoor restricting element that device is correspondingly arranged, each indoor unit include that indoor heat exchanger and the corresponding indoor heat exchanger are arranged Indoor restricting element, wherein one end of each indoor heat exchanger by corresponding indoor restricting element and the first pipeline with Each outdoor restricting element is connected, and the other end of each indoor heat exchanger passes through the second pipeline and first four-way The first port of valve is connected, and is connected by third pipeline with the second port of first four-way valve, the anti-refrigerant bias current Control method obtains described more respectively the following steps are included: when the multi-line system is with the operation of hybrid refrigeration heating mode The degree of superheat of indoor unit of freezing in a indoor unit and the degree of supercooling of heating indoor unit；Obtain the work of each outdoor heat exchanger State；According to the working condition of each outdoor heat exchanger, the degree of superheat of the refrigeration indoor unit and the heating indoor unit Degree of supercooling the aperture of at least one of multiple outdoor restricting elements and multiple indoor restricting elements is adjusted Section.
The anti-refrigerant bias current control method of multi-line system according to an embodiment of the present invention, when multi-line system is to mix system When cold heating mode is run, the degree of superheat for the indoor unit that freezes in multiple indoor units and the degree of supercooling of heating indoor unit are obtained respectively, And the working condition of each outdoor heat exchanger is obtained, further according to the working condition of each outdoor heat exchanger, refrigeration indoor unit The degree of superheat and heating indoor unit degree of supercooling at least one of multiple outdoor restricting elements and multiple indoor restricting elements Aperture be adjusted.This method is rationally adjusted by the aperture to outdoor restricting element and indoor restricting element, can Effectively avoid the problem that refrigeration indoor unit because refrigerating capacity is insufficient caused by lacking refrigerant or more refrigerants or returns liquid.
In addition, the anti-refrigerant bias current control method of the multi-line system proposed according to that above embodiment of the present invention can also have There is following additional technical characteristic:
According to one embodiment of present invention, according in the working condition of each outdoor heat exchanger, the cool room The degree of superheat of machine and the degree of supercooling of the heating indoor unit are to multiple outdoor restricting elements and multiple indoor throttling members The aperture of at least one of part is adjusted, comprising: when at least one of the multiple outdoor heat exchanger is outdoor evaporation When device, judge whether the degree of superheat of the refrigeration indoor unit is bigger than normal；When the degree of superheat of the refrigeration indoor unit is bigger than normal, further Judge whether the aperture of the corresponding indoor restricting element of the refrigeration indoor unit reaches maximum opening；If the refrigeration indoor unit The aperture of corresponding interior restricting element is not up to maximum opening, then increases the corresponding indoor restricting element of the refrigeration indoor unit Aperture；If the aperture of the corresponding indoor restricting element of the refrigeration indoor unit reaches maximum opening, reduce the outdoor The aperture of the corresponding outdoor restricting element of evaporator.
According to one embodiment of present invention, according in the working condition of each outdoor heat exchanger, the cool room The degree of superheat of machine and the degree of supercooling of the heating indoor unit are to multiple outdoor restricting elements and multiple indoor throttling members The aperture of at least one of part is adjusted, comprising: when a part in the multiple outdoor heat exchanger be outdoor condenser, When another part is outdoor evaporator, judge whether the degree of supercooling of the heating indoor unit is bigger than normal；If the heating indoor unit Degree of supercooling it is bigger than normal, then increase the aperture of the corresponding outdoor restricting element of the outdoor condenser.
According to one embodiment of present invention, according in the working condition of each outdoor heat exchanger, the cool room The degree of superheat of machine and the degree of supercooling of the heating indoor unit are to multiple outdoor restricting elements and multiple indoor throttling members The aperture of at least one of part is adjusted, comprising: when the multiple outdoor heat exchanger is outdoor evaporator, judges institute Whether the degree of supercooling for stating heating indoor unit is bigger than normal；When the degree of supercooling of the heating indoor unit is bigger than normal, the system is further judged Whether the aperture of the corresponding indoor restricting element of hot indoor unit reaches maximum opening；If the corresponding interior of the heating indoor unit The aperture of restricting element is not up to maximum opening, then increases the aperture of the corresponding indoor restricting element of the heating indoor unit；Such as The aperture of the corresponding indoor restricting element of heating indoor unit described in fruit reaches maximum opening, then it is corresponding to increase the outdoor evaporator Outdoor restricting element aperture.
According to one embodiment of present invention, according in the working condition of each outdoor heat exchanger, the cool room The degree of superheat of machine and the degree of supercooling of the heating indoor unit are to multiple outdoor restricting elements and multiple indoor throttling members The aperture of at least one of part is adjusted, comprising: when the multiple outdoor heat exchanger is outdoor condenser, judges institute Whether the degree of superheat for stating refrigeration indoor unit is less than normal；When the degree of superheat of the refrigeration indoor unit is less than normal, the system is further judged Whether the aperture of the corresponding indoor restricting element of cold indoor unit reaches minimum aperture；If the corresponding interior of the refrigeration indoor unit The aperture of restricting element is not up to minimum aperture, then reduces the aperture of the corresponding indoor restricting element of the refrigeration indoor unit；Such as The aperture of the corresponding indoor restricting element of refrigeration indoor unit described in fruit reaches minimum aperture, then it is corresponding to reduce the outdoor condenser Outdoor restricting element aperture.
In order to achieve the above objectives, second aspect of the present invention embodiment proposes a kind of computer readable storage medium, has It is stored in instruction therein, when executed, the multi-line system executes above-mentioned anti-refrigerant bias current controlling party Method.
The computer readable storage medium of the embodiment of the present invention is led to by executing above-mentioned anti-refrigerant bias current control method It crosses and the aperture of outdoor restricting element and indoor restricting element is rationally adjusted, can be good at solving refrigeration indoor unit because lacking The problem of refrigerating capacity is insufficient caused by few refrigerant or more refrigerants or returns liquid.
In order to achieve the above objectives, third aspect present invention embodiment proposes a kind of anti-refrigerant bias current control of multi-line system Device processed, the multi-line system include outdoor unit, multiple indoor units and part flow arrangement, and the outdoor unit includes the first four-way Valve, multiple outdoor heat exchangers, the second four-way valve being correspondingly arranged respectively with each outdoor heat exchanger, respectively with each outdoor heat exchange The outdoor restricting element that device is correspondingly arranged, each indoor unit include that indoor heat exchanger and the corresponding indoor heat exchanger are arranged Indoor restricting element, wherein one end of each indoor heat exchanger by corresponding indoor restricting element and the first pipeline with Each outdoor restricting element is connected, and the other end of each indoor heat exchanger passes through the second pipeline and first four-way The first port of valve is connected, and is connected by third pipeline with the second port of first four-way valve, the anti-refrigerant bias current Control device includes: the first acquisition module, for being obtained respectively when the multi-line system is with the operation of hybrid refrigeration heating mode Take the degree of superheat for the indoor unit that freezes in the multiple indoor unit and the degree of supercooling of heating indoor unit；Second obtains module, for obtaining Take the working condition of each outdoor heat exchanger；Control module, for according to the working condition of each outdoor heat exchanger, The degree of superheat of the refrigeration indoor unit and the degree of supercooling of the heating indoor unit are to multiple outdoor restricting elements and multiple institutes The aperture for stating at least one of indoor restricting element is adjusted.
The anti-refrigerant bias current control device of multi-line system according to an embodiment of the present invention, when multi-line system is to mix system When cold heating mode is run, the degree of superheat and heating of the indoor unit that freezes in multiple indoor units are obtained respectively by the first acquisition module The degree of supercooling of indoor unit, and the working condition that module obtains each outdoor heat exchanger is obtained by second, further pass through control Module is according to the working condition of each outdoor heat exchanger, the degree of superheat for the indoor unit that freezes and heats the degree of supercooling of indoor unit to multiple The aperture of at least one of outdoor restricting element and multiple indoor restricting elements is adjusted.The device passes through to outdoor throttling The aperture of element and indoor restricting element is rationally adjusted, and can effectively avoid refrigeration indoor unit because lacking refrigerant or more refrigerants Caused by refrigerating capacity it is insufficient or the problem of return liquid.
In addition, the anti-refrigerant bias current control device of the multi-line system proposed according to that above embodiment of the present invention can also have There is following additional technical characteristic:
According to one embodiment of present invention, the control module according to the working condition of each outdoor heat exchanger, The degree of superheat of the refrigeration indoor unit and the degree of supercooling of the heating indoor unit are to multiple outdoor restricting elements and multiple institutes The aperture for stating at least one of indoor restricting element is adjusted, comprising: as at least one in the multiple outdoor heat exchanger It is a be outdoor evaporator when, judge it is described freeze indoor unit the degree of superheat it is whether bigger than normal；When the degree of superheat of the refrigeration indoor unit When bigger than normal, further judge whether the aperture of the corresponding indoor restricting element of the refrigeration indoor unit reaches maximum opening；If The aperture of the corresponding indoor restricting element of the refrigeration indoor unit is not up to maximum opening, then increases the refrigeration indoor unit correspondence Indoor restricting element aperture；If the aperture of the corresponding indoor restricting element of the refrigeration indoor unit reaches maximum opening, Then reduce the aperture of the corresponding outdoor restricting element of the outdoor evaporator.
According to one embodiment of present invention, the control module according to the working condition of each outdoor heat exchanger, The degree of superheat of the refrigeration indoor unit and the degree of supercooling of the heating indoor unit are to multiple outdoor restricting elements and multiple institutes The aperture for stating at least one of indoor restricting element is adjusted, comprising: a part in the multiple outdoor heat exchanger When for outdoor condenser, another part being outdoor evaporator, judge whether the degree of supercooling of the heating indoor unit is bigger than normal；If institute The degree of supercooling for stating heating indoor unit is bigger than normal, then increases the aperture of the corresponding outdoor restricting element of the outdoor condenser.
According to one embodiment of present invention, the control module according to the working condition of each outdoor heat exchanger, The degree of superheat of the refrigeration indoor unit and the degree of supercooling of the heating indoor unit are to multiple outdoor restricting elements and multiple institutes The aperture for stating at least one of indoor restricting element is adjusted, comprising: when the multiple outdoor heat exchanger is outdoor steaming When sending out device, judge whether the degree of supercooling of the heating indoor unit is bigger than normal；When the degree of supercooling of the heating indoor unit is bigger than normal, into one Step judges whether the aperture of the corresponding indoor restricting element of the heating indoor unit reaches maximum opening；If in the heating chamber The aperture of the corresponding indoor restricting element of machine is not up to maximum opening, then increases the corresponding indoor throttling member of the heating indoor unit The aperture of part；If the aperture for heating the corresponding indoor restricting element of indoor unit reaches maximum opening, increase the room The aperture of the corresponding outdoor restricting element of outer evaporator.
According to one embodiment of present invention, the control module according to the working condition of each outdoor heat exchanger, The degree of superheat of the refrigeration indoor unit and the degree of supercooling of the heating indoor unit are to multiple outdoor restricting elements and multiple institutes The aperture for stating at least one of indoor restricting element is adjusted, comprising: when the multiple outdoor heat exchanger is outdoor cold When condenser, judge whether the degree of superheat of the refrigeration indoor unit is less than normal；When the degree of superheat of the refrigeration indoor unit is less than normal, into one Step judges whether the aperture of the corresponding indoor restricting element of the refrigeration indoor unit reaches minimum aperture；If in the cool room The aperture of the corresponding indoor restricting element of machine is not up to minimum aperture, then reduces the corresponding indoor throttling member of the refrigeration indoor unit The aperture of part；If the aperture of the corresponding indoor restricting element of the refrigeration indoor unit reaches minimum aperture, reduce the room The aperture of the corresponding outdoor restricting element of external condenser.
In order to achieve the above objectives, fourth aspect present invention embodiment proposes a kind of multi-line system comprising above-mentioned Anti- refrigerant bias current control device.
The multi-line system of the embodiment of the present invention, by above-mentioned anti-refrigerant bias current control device, by outdoor throttling The aperture of element and indoor restricting element is rationally adjusted, and can effectively avoid refrigeration indoor unit because lacking refrigerant or more refrigerants Caused by refrigerating capacity it is insufficient or the problem of return liquid.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of multi-line system according to an embodiment of the invention；
Fig. 2 is the flow chart of the anti-refrigerant bias current control method of multi-line system according to an embodiment of the present invention；
Fig. 3 is multi-line system according to an embodiment of the invention with the stream of refrigerant when the operation of hybrid refrigeration heating mode Xiang Tu；
Fig. 4 is the flow chart of the anti-refrigerant bias current control method of multi-line system according to an embodiment of the invention；
Fig. 5 is multi-line system in accordance with another embodiment of the present invention with refrigerant when the operation of hybrid refrigeration heating mode Flow graph；
Fig. 6 is the multi-line system of another embodiment according to the present invention with refrigerant when the operation of hybrid refrigeration heating mode Flow graph；And
Fig. 7 is the flow chart of the anti-refrigerant bias current control device of multi-line system according to an embodiment of the present invention.
Specific embodiment
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached The embodiment of figure description is exemplary, it is intended to is used to explain the present invention, and is not considered as limiting the invention.
With reference to the accompanying drawing come describe proposition of the embodiment of the present invention multi-line system anti-refrigerant bias current control method, more The anti-refrigerant bias current control device of on-line system and multi-line system with the anti-refrigerant bias current control device.
In an embodiment of the present invention, multi-line system includes outdoor unit, multiple indoor units and part flow arrangement, outdoor unit packet Include the first four-way valve, multiple outdoor heat exchangers, the second four-way valve being correspondingly arranged respectively with each outdoor heat exchanger, respectively and often The outdoor restricting element that a outdoor heat exchanger is correspondingly arranged, each indoor unit include indoor heat exchanger and the corresponding indoor heat exchanger The indoor restricting element of setting, wherein one end of each indoor heat exchanger passes through corresponding indoor restricting element and the first pipeline It is connected with each outdoor restricting element, the other end of each indoor heat exchanger passes through the first end of the second pipeline and the first four-way valve Mouth is connected, and is connected by third pipeline with the second port of the first four-way valve.Wherein, multiple outdoor heat exchangers and multiple interiors The number of machine can be configured according to the actual situation, for example, multiple outdoor heat exchangers may include the first outdoor heat exchanger and Two outdoor heat exchangers, multiple indoor units may include the first indoor unit and the second indoor unit.
Specifically, as shown in Figure 1, multi-line system may include outdoor unit 10, multiple indoor units 20 and part flow arrangement 30.Room Outer machine 10 may include the first four-way valve ST1, the first outdoor heat exchanger 11, the second outdoor heat exchanger 12, compressor 13, outdoor gas-liquid Separator 14, oil eliminator 15, bypass capillary 16, the second four-way valve ST2 being correspondingly arranged with the first outdoor heat exchanger 11, with The second four-way valve ST3 that second outdoor heat exchanger 12 is correspondingly arranged and the outdoor throttling that the first outdoor heat exchanger 11 is correspondingly arranged The element EXVA and outdoor restricting element EXVB being correspondingly arranged with the second outdoor heat exchanger 12.Wherein, the exhaust outlet of compressor 13 Be connected with the first end of oil eliminator 15, the second end of oil eliminator 15 respectively with the third end of the first four-way valve ST1, the two or four The third end of port valve ST2 is connected with the third end of the second four-way valve ST3, second end and the third pipeline phase of the first four-way valve ST1 Even, the first end of the first four-way valve ST1 is connected with the second pipeline, one end of outdoor gas-liquid separator 14 respectively with the first four-way valve The first end of ST1, the first end of the second four-way valve ST2 are connected with the first end of the second four-way valve ST3, outdoor gas-liquid separator 14 One end also pass through the 4th end of capillary and the first four-way valve ST1, the 4th end of the second four-way valve ST2 and the second four-way respectively The 4th end of valve ST3 is connected, the third end of oil eliminator 15 by bypass capillary 16 respectively with outdoor gas-liquid separator 14 The other end is connected with the gas returning port of compressor 13, one end phase of the second end of the second four-way valve ST2 and the first outdoor heat exchanger 11 Even, the other end of the first outdoor heat exchanger 11 is connected to the first pipeline by outdoor restricting element EXVA, the second four-way valve ST3's Second end is connected with one end of the second outdoor heat exchanger 12, and the other end of the second outdoor heat exchanger 12 passes through outdoor restricting element EXVB is connected to the first pipeline.Wherein, outdoor restricting element EXVA and EXVB can be electric expansion valve.
Multiple indoor units 20 may include the first indoor unit and the second indoor unit.Wherein, the first indoor unit may include first The indoor restricting element EXV1 of indoor heat exchanger 21 and corresponding first indoor heat exchanger 21 setting, the second indoor unit may include second The indoor restricting element EXV2 of indoor heat exchanger 22 and corresponding second indoor heat exchanger 22 setting.Indoor restricting element EXV1 and EXV2 can be electric expansion valve.
Part flow arrangement 30 may include heat exchanger 31, supercooling circuit valve body EV, multiple refrigeration on-off valves 32 and 33, multiple heatings On-off valve 34 and 35.Wherein, the entrance of the first heat exchange flow path of heat exchanger 31 passes through the first pipeline and outdoor restricting element EXVA It is connected with EXVB, in the first indoor unit and second Room in the outlet and multiple indoor units 20 of the first heat exchange flow path of heat exchanger 31 Machine is connected, the first heat exchange flow path that the entrance of the second heat exchange flow path of heat exchanger 31 passes through supercooling circuit valve body EV and heat exchanger 31 Outlet be connected, heat exchanger 31 second heat exchange flow path outlet and one end phase of the outdoor gas-liquid separator 14 in outdoor unit 10 Even.Circuit valve body EV, which is subcooled, to be electric expansion valve, and heat exchanger 31 can be plate heat exchanger.
One end of first indoor heat exchanger 21 passes through the first heat exchange flow path of interior restricting element EXV1 and heat exchanger 31 Outlet (that is, entrance of the second heat exchange flow path of heat exchanger 31) is connected, and one end of the second indoor heat exchanger 22 passes through indoor throttling Element EXV2 is connected with the outlet of the first heat exchange flow path of heat exchanger 31, in the other end and second Room of the first indoor heat exchanger 21 The other end of heat exchanger 22 passes through corresponding refrigeration on-off valve 32 and 33 respectively and is connected with the second pipeline, the first indoor heat exchanger 21 The other end and the other end of the second indoor heat exchanger 22 also pass through corresponding heating on-off valve 34 and 35 and third pipeline respectively It is connected.
Fig. 2 is the anti-refrigerant bias current control method of multi-line system according to an embodiment of the present invention.As shown in Fig. 2, this is more The anti-refrigerant bias current control method of on-line system can comprise the following steps that
S1 is obtained in multiple indoor units in cool room respectively when multi-line system is with the operation of hybrid refrigeration heating mode The degree of superheat of machine and the degree of supercooling of heating indoor unit.
It specifically, can be by obtaining the outlet of refrigeration indoor unit when multi-line system is with the operation of hybrid refrigeration heating mode Saturation temperature corresponding to the temperature at place and the pressure in exit come calculate refrigeration indoor unit the degree of superheat, or by obtain system In cold indoor unit the temperature of the outlet and middle part of indoor heat exchanger come calculate refrigeration indoor unit the degree of superheat；By obtaining heating chamber Saturation temperature corresponding to the temperature in interior machine exit and the pressure in exit heats the degree of supercooling of indoor unit, Huo Zhetong to calculate Cross the degree of supercooling for obtaining the temperature for heating the outlet and middle part of indoor heat exchanger in indoor unit to calculate heating indoor unit.
For example, by be arranged in refrigeration indoor unit in indoor heat exchanger exit temperature sensor (such as temperature sensing package) The temperature Tout1 at this is obtained, and by the way that temperature sensor (such as temperature-sensitive in refrigeration indoor unit in the middle part of indoor heat exchanger is arranged in Packet) temperature Tin1 at this is obtained, the degree of superheat DSH of refrigeration indoor unit is further calculated according to temperature Tout1 and temperature Tin1 =Tout1-Tin1；Temperature sensor (such as temperature sensing package) by the way that indoor heat exchanger exit in heating indoor unit is arranged in obtains Temperature Tout2 at this is obtained by the way that the temperature sensor (such as temperature sensing package) in heating indoor unit in the middle part of indoor heat exchanger is arranged in The temperature Tin2 at this is taken, the degree of supercooling DSC=of heating indoor unit is further calculated according to temperature Tout2 and temperature Tin2 Tout2-Tin2。
S2 obtains the working condition of each outdoor heat exchanger.
Wherein, the working condition of multiple outdoor heat exchangers can include: multiple outdoor heat exchangers make as outdoor evaporator With；A part in multiple outdoor heat exchangers is used as outdoor condenser, another part as outdoor evaporator；Multiple outdoors Heat exchanger is used as outdoor condenser.
S3, according to the working condition of each outdoor heat exchanger, the degree of superheat for the indoor unit that freezes and the supercooling for heating indoor unit It spends and the aperture of at least one of multiple outdoor restricting elements and multiple indoor restricting elements is adjusted.
In one embodiment of the invention, according to the working condition of each outdoor heat exchanger, the overheat for the indoor unit that freezes Aperture of the degree of supercooling of degree and heating indoor unit at least one of multiple outdoor restricting elements and multiple indoor restricting elements It is adjusted, comprising: when at least one of multiple outdoor heat exchangers are outdoor evaporator, judge the overheat of refrigeration indoor unit It whether bigger than normal spends；When the degree of superheat for the indoor unit that freezes is bigger than normal, the corresponding indoor restricting element of refrigeration indoor unit is further judged Aperture whether reach maximum opening；If the aperture of the corresponding indoor restricting element of refrigeration indoor unit is not up to maximum opening, Then increase the aperture of the corresponding indoor restricting element of refrigeration indoor unit；If the corresponding indoor restricting element of refrigeration indoor unit is opened Degree reaches maximum opening, then reduces the aperture of the corresponding outdoor restricting element of outdoor evaporator.
Further, according to the working condition of each outdoor heat exchanger, the degree of superheat for the indoor unit that freezes and heating indoor unit Degree of supercooling the aperture of at least one of multiple outdoor restricting elements and multiple indoor restricting elements is adjusted, comprising: When multiple outdoor heat exchangers are outdoor evaporator, judge whether the degree of supercooling for heating indoor unit is bigger than normal；When heating indoor unit Degree of supercooling it is bigger than normal when, further judge heat indoor unit it is corresponding interior restricting element aperture whether reach maximum opening； If the aperture of the corresponding indoor restricting element of heating indoor unit is not up to maximum opening, increase the corresponding room of heating indoor unit The aperture of interior restricting element；If the aperture of the corresponding indoor restricting element of heating indoor unit reaches maximum opening, increase room The aperture of the corresponding outdoor restricting element of outer evaporator.
Specifically, user can issue user instruction by remote controler etc., be heated with controlling more coupled systems with hybrid refrigeration Mode operation, wherein the first indoor unit is run (that is, the first indoor unit is used as refrigeration indoor unit) in a chiller mode, and second Indoor unit runs (that is, the second indoor unit is used as heating indoor unit), the first outdoor heat exchanger and second Room using heating mode External heat exchanger is used as outdoor evaporator to use.Further, high when multi-line system is with the operation of hybrid refrigeration heating mode Refrigerant and low pressure refrigerant flow direction is pressed as shown in the solid arrow and dotted arrow in Fig. 3, to pass through the second indoor heat exchanger 22 respectively Refrigerant through indoor restricting element EXV2 point be two-way, flow into the first indoor heat exchanger 21 through indoor restricting element EXV1 all the way； Another way separately flows into 11 and of the first outdoor heat exchanger through heat exchanger 31, outdoor restricting element EXVA and outdoor restricting element EXVB Second outdoor heat exchanger 12.If the aperture control of indoor restricting element and outdoor restricting element is unreasonable, it is easy to cause The coolant quantity for flowing into the first indoor heat exchanger 21 is less, flows into the refrigerant of the first outdoor heat exchanger 11 and the second outdoor heat exchanger 12 More problem is measured, so that the refrigerating capacity for the interior machine that freezes can not be ensured.
For this purpose, obtaining the degree of superheat of refrigeration indoor unit in real time when multi-line system is with the operation of hybrid refrigeration heating mode The degree of supercooling DSC of DSH and heating indoor unit, and calculate the degree of superheat DSH and the first goal-selling degree of superheat of refrigeration indoor unit Difference (DSH-DSH1) between DSH1 target, heat indoor unit degree of supercooling DSC and the first goal-selling degree of supercooling DSC1 it Between difference (DSC-DSC1), then judge the size relation between (DSH-DSH1) and the first return difference temperature DSH11, judge (DSC-DSC1) size relation between the second return difference temperature DSC11.
If (DSH-DSH1) > DSH11, judge that the degree of superheat of refrigeration indoor unit (such as the first indoor unit) is bigger than normal.Work as system When the degree of superheat of cold indoor unit is bigger than normal, further the aperture of the corresponding indoor restricting element (such as EXV1) of judgement refrigeration indoor unit is It is no to reach maximum opening.If it is not, then the aperture of indoor restricting element corresponding to refrigeration indoor unit carries out tuning up control；If It is, then outdoor restricting element (such as EXVA corresponding to outdoor evaporator (such as the first outdoor heat exchanger and the second outdoor heat exchanger) And EXVB) aperture carry out turning control down, until | DSH-DSH1 |≤DSH11 so that flow through refrigeration indoor unit coolant quantity increase It is more, guarantee the refrigerating capacity of refrigeration indoor unit.
Meanwhile if (DSC-DSC1) > DSC11, judge that the degree of supercooling for heating indoor unit (such as the second indoor unit) is inclined Greatly.When the degree of supercooling for heating indoor unit is bigger than normal, further judgement heats the corresponding indoor restricting element (such as EXV2) of indoor unit Aperture whether reach maximum opening.If it is not, then the aperture of indoor restricting element corresponding to heating indoor unit tunes up Control；If it is, outdoor throttling member corresponding to outdoor evaporator (e.g., the first outdoor heat exchanger and the second outdoor heat exchanger) The aperture of part (such as EXVA and EXVB) carries out tuning up control simultaneously, to reduce the degree of supercooling of heating indoor unit.
To further illustrate, Fig. 4 shows specific flow chart.As shown in figure 4, the anti-refrigerant bias current of the multi-line system controls Method can comprise the following steps that
S101 controls multi-line system with the operation of hybrid refrigeration heating mode.
S102 obtains the degree of superheat DSH of refrigeration indoor unit and the degree of supercooling DSC of heating indoor unit.
S103 calculates the difference (DSH-DSH1) of refrigeration indoor unit, heats the difference (DSC-DSC1) of indoor unit.
Whether S104, judgement (DSH-DSH1) > the first return difference temperature DSH11 are true.If so, executing step S105.
S105 judges that the degree of superheat of refrigeration indoor unit is bigger than normal.
S106, judges whether the aperture of the corresponding indoor restricting element of refrigeration indoor unit reaches maximum opening.If so, holding Row step S107；If not, executing step S108.
The aperture of S107, outdoor restricting element corresponding to outdoor evaporator carry out turning control down, until | DSH-DSH1 | ≤DSH11。
The aperture of S108, indoor restricting element corresponding to refrigeration indoor unit carry out tuning up control.
Whether S109, judgement (DSC-DSC1) > the second return difference temperature DSC11 are true.If so, executing step is 110.
S110 judges that the degree of supercooling for heating indoor unit is bigger than normal.
S111, judges whether the aperture for heating the corresponding indoor restricting element of indoor unit reaches maximum opening.If so, holding Row step S112；If not, executing step S113.
The aperture of S112, outdoor restricting element corresponding to outdoor evaporator carry out tuning up control.
The aperture of S113, indoor restricting element corresponding to heating indoor unit carry out tuning up control.
The anti-refrigerant bias current control method of the multi-line system of the embodiment of the present invention as a result, when multi-line system is to mix When cooling and warming mode operation, pass through working condition, the degree of superheat and heating of the indoor unit that freezes according to each outdoor heat exchanger It is reasonable that the degree of supercooling of indoor unit carries out the aperture of at least one of multiple outdoor restricting elements and multiple indoor restricting elements It adjusts, can effectively avoid refrigeration indoor unit because of the problem of refrigerating capacity deficiency caused by lacking refrigerant.
In another embodiment of the present invention, according to the working condition of each outdoor heat exchanger, the mistake for the indoor unit that freezes Temperature and the degree of supercooling of heating indoor unit opening at least one of multiple outdoor restricting elements and multiple indoor restricting elements Degree is adjusted, comprising: when at least one of multiple outdoor heat exchangers are outdoor evaporator, judges the mistake of refrigeration indoor unit Whether temperature is bigger than normal；When the degree of superheat for the indoor unit that freezes is bigger than normal, the corresponding indoor throttling member of refrigeration indoor unit is further judged Whether the aperture of part reaches maximum opening；If the aperture of the corresponding indoor restricting element of refrigeration indoor unit is not up to maximum and opens Degree then increases the aperture of the corresponding indoor restricting element of refrigeration indoor unit；If the corresponding indoor restricting element of the indoor unit that freezes Aperture reach maximum opening, then reduce the aperture of the corresponding outdoor restricting element of outdoor evaporator.
Further, according to the working condition of each outdoor heat exchanger, the degree of superheat for the indoor unit that freezes and heating indoor unit Degree of supercooling the aperture of at least one of multiple outdoor restricting elements and multiple indoor restricting elements is adjusted, comprising: When a part in multiple outdoor heat exchangers is outdoor condenser, another part is outdoor evaporator, judge to heat indoor unit Degree of supercooling it is whether bigger than normal；If the degree of supercooling for heating indoor unit is bigger than normal, increase the corresponding outdoor throttling member of outdoor condenser The aperture of part.
Specifically, user can issue user instruction by remote controler etc., be heated with controlling multi-line system with hybrid refrigeration Mode operation, wherein the first indoor unit is run (that is, the first indoor unit is used as refrigeration indoor unit) in a chiller mode, and second Indoor unit runs (that is, the second indoor unit is used as heating indoor unit) using heating mode, and the first outdoor heat exchanger is as outdoor Condenser uses, and the second outdoor heat exchanger is used as outdoor evaporator.Further, when multi-line system is with hybrid refrigeration system When heat pattern is run, the flow direction of high pressure refrigerant and low pressure refrigerant as shown in the solid arrow and dotted arrow in Fig. 5, passes through respectively The refrigerant of first outdoor heat exchanger 11 is two-way through outdoor restricting element EXVA points, all the way through heat exchanger 31 and indoor restricting element EXV1 flows into the first indoor heat exchanger 21；Another way flows into the second outdoor heat exchanger 12 through outdoor restricting element EXVB.If room The aperture of interior restricting element and outdoor restricting element controls unreasonable, it is easy to cause to flow into the cold of the first indoor heat exchanger 21 Matchmaker's amount is less, flows into the more problem of the coolant quantity of the second outdoor heat exchanger 12, so that the refrigeration energy for the interior machine that freezes can not be ensured Power.
For this purpose, obtaining the degree of superheat of refrigeration indoor unit in real time when multi-line system is with the operation of hybrid refrigeration heating mode The degree of supercooling DSC of DSH and heating indoor unit, and calculate the degree of superheat DSH and the first goal-selling degree of superheat of refrigeration indoor unit Difference (DSH-DSH1) between DSH1 target, heat indoor unit degree of supercooling DSC and the first goal-selling degree of supercooling DSC1 it Between difference (DSC-DSC1), then judge the size relation between (DSH-DSH1) and the first return difference temperature DSH11, sentence simultaneously Size relation between disconnected (DSC-DSC1) and the second return difference temperature DSC11.
If (DSH-DSH1) > DSH11, judge that the degree of superheat of refrigeration indoor unit (such as the first indoor unit) is bigger than normal.Work as system When the degree of superheat of cold indoor unit is bigger than normal, further the aperture of the corresponding indoor restricting element (such as EXV1) of judgement refrigeration indoor unit is It is no to reach maximum opening.If it is not, then the aperture of indoor restricting element corresponding to refrigeration indoor unit carries out tuning up control；If It is that then the aperture of outdoor restricting element (such as EXVB) corresponding to outdoor evaporator (such as the second outdoor heat exchanger) carries out turning control down System, until | DSH-DSH1 |≤DSH11 guarantees the refrigeration of refrigeration indoor unit so that the coolant quantity for flowing through refrigeration indoor unit increases Ability.
Meanwhile if (DSC-DSC1) > DSC11, judge that the degree of supercooling for heating indoor unit (such as the second indoor unit) is inclined Greatly.When the degree of supercooling for heating indoor unit is bigger than normal, outdoor throttling member corresponding to outdoor condenser (such as the first outdoor heat exchanger) The aperture of part (such as EXVA) carries out tuning up control, to reduce the degree of supercooling of heating indoor unit.
The anti-refrigerant bias current control method of the multi-line system of the embodiment of the present invention as a result, when multi-line system is to mix When cooling and warming mode operation, pass through working condition, the degree of superheat and heating of the indoor unit that freezes according to each outdoor heat exchanger It is reasonable that the degree of supercooling of indoor unit carries out the aperture of at least one of multiple outdoor restricting elements and multiple indoor restricting elements It adjusts, can effectively avoid refrigeration indoor unit because of the problem of refrigerating capacity deficiency caused by lacking refrigerant.
In yet another embodiment of the present invention, according to the working condition of each outdoor heat exchanger, the mistake for the indoor unit that freezes Temperature and the degree of supercooling of heating indoor unit opening at least one of multiple outdoor restricting elements and multiple indoor restricting elements Degree is adjusted, comprising: when multiple outdoor heat exchangers are outdoor condenser, judges whether the degree of superheat of refrigeration indoor unit is inclined It is small；When the degree of superheat for the indoor unit that freezes is less than normal, further the aperture of the corresponding indoor restricting element of judgement refrigeration indoor unit is It is no to reach minimum aperture；If the aperture of the corresponding indoor restricting element of the indoor unit that freezes is not up to minimum aperture, reduce system The aperture of the corresponding indoor restricting element of cold indoor unit；If the aperture of the corresponding indoor restricting element of refrigeration indoor unit reaches most Small guide vane then reduces the aperture of the corresponding outdoor restricting element of outdoor condenser.
Specifically, user can issue user instruction by remote controler etc., be heated with controlling multi-line system with hybrid refrigeration Mode operation, wherein the first indoor unit is run (that is, the first indoor unit is used as refrigeration indoor unit) in a chiller mode, and second Indoor unit runs (that is, the second indoor unit is used as heating indoor unit), the first outdoor heat exchanger and second Room using heating mode External heat exchanger is used as outdoor condenser.Further, high when multi-line system is with the operation of hybrid refrigeration heating mode It presses the flow direction of refrigerant and low pressure refrigerant respectively as shown in the solid arrow and dotted arrow in Fig. 6, flows into the first indoor heat exchanger 21 refrigerants have two-way, are changed outside by refrigerant of first outdoor heat exchanger 11 through outdoor restricting element EXVA with by second Room all the way It is indoor that hot device 12 flows into first after the refrigerant of outdoor restricting element EXVB collects, through heat exchanger 31 and interior restricting element EXV1 Heat exchanger 21；Another way passes through the refrigerant that the second indoor heat exchanger 22 flows out, and it is indoor to flow into first through indoor restricting element EXV2 Heat exchanger 21.If the aperture control of indoor restricting element and outdoor restricting element is unreasonable, it is easy to lead to inflow first The more problem of the coolant quantity of indoor heat exchanger 21, so as to cause return liquid the problem of.
For this purpose, obtaining the degree of superheat of refrigeration indoor unit in real time when multi-line system is with the operation of hybrid refrigeration heating mode DSH, and calculate refrigeration indoor unit degree of superheat DSH and the first goal-selling degree of superheat DSH1 target between difference (DSH- DSH1), then judge the size relation between (DSH-DSH1) and the first return difference temperature DSH11.
If (DSH-DSH1) <-DSH11, judge that the degree of superheat of refrigeration indoor unit (such as the first indoor unit) is less than normal.When When the degree of superheat of refrigeration indoor unit is less than normal, the aperture of the corresponding indoor restricting element (such as EXV1) of refrigeration indoor unit is further judged Whether minimum aperture is reached.If it is not, then carrying out turning control down to the aperture of the corresponding indoor restricting element of refrigeration indoor unit； If it is, the aperture of outdoor restricting element (such as EXVA and EXVB) corresponding to outdoor condenser carries out turning control down simultaneously, Until | DSH-DSH1 |≤DSH11, to prevent in cool room machine more refrigerants occur, caused by return liquid problem.
The anti-refrigerant bias current control method of the multi-line system of the embodiment of the present invention as a result, when multi-line system is to mix When cooling and warming mode operation, pass through working condition, the degree of superheat and heating of the indoor unit that freezes according to each outdoor heat exchanger It is reasonable that the degree of supercooling of indoor unit carries out the aperture of at least one of multiple outdoor restricting elements and multiple indoor restricting elements It adjusts, can effectively avoid refrigeration indoor unit because returning liquid problem caused by more refrigerants.
In conclusion the anti-refrigerant bias current control method of multi-line system according to an embodiment of the present invention, when multi-connected machine system When system is with the operation of hybrid refrigeration heating mode, the degree of superheat and heating indoor unit of the indoor unit that freezes in multiple indoor units are obtained respectively Degree of supercooling, and the working condition of each outdoor heat exchanger is obtained, further according to the working condition of each outdoor heat exchanger, system The degree of superheat of cold indoor unit and the degree of supercooling of heating indoor unit are in multiple outdoor restricting elements and multiple indoor restricting elements The aperture of at least one is adjusted.This method is rationally adjusted by the aperture to outdoor restricting element and indoor restricting element Section can effectively avoid the problem that refrigeration indoor unit because refrigerating capacity is insufficient caused by lacking refrigerant or more refrigerants or returns liquid.
In addition, the embodiment of the present invention also proposed a kind of computer readable storage medium, has and be stored in finger therein It enables, when executed, multi-line system executes above-mentioned anti-refrigerant bias current control method.
The computer readable storage medium of the embodiment of the present invention is led to by executing above-mentioned anti-refrigerant bias current control method It crosses and the aperture of outdoor restricting element and indoor restricting element is rationally adjusted, can effectively avoid refrigeration indoor unit because lacking The problem of refrigerating capacity is insufficient caused by refrigerant or more refrigerants or returns liquid.
As shown in fig. 7, the embodiment of the present invention also proposed a kind of anti-refrigerant bias current control device of multi-line system.Such as Shown in Fig. 7, the anti-refrigerant bias current control device of the multi-line system can include: first, which obtains module 100, second, obtains module 200 and control module 300.
Wherein, first module 100 is obtained for being obtained respectively when multi-line system is with the operation of hybrid refrigeration heating mode The degree of superheat of indoor unit of freezing in multiple indoor units and the degree of supercooling of heating indoor unit.Second acquisition module 200 is every for obtaining The working condition of a outdoor heat exchanger.Control module 300 is used for the working condition according to each outdoor heat exchanger, refrigeration indoor unit The degree of superheat and heating indoor unit degree of supercooling at least one of multiple outdoor restricting elements and multiple indoor restricting elements Aperture be adjusted.
According to one embodiment of present invention, working condition of the control module 300 according to each outdoor heat exchanger, cool room The degree of superheat of interior machine and the degree of supercooling of heating indoor unit in multiple outdoor restricting elements and multiple indoor restricting elements at least One aperture is adjusted, comprising: when at least one of multiple outdoor heat exchangers are outdoor evaporator, judges cool room Whether the degree of superheat of interior machine is bigger than normal；When the degree of superheat for the indoor unit that freezes is bigger than normal, the corresponding room of refrigeration indoor unit is further judged Whether the aperture of interior restricting element reaches maximum opening；If the aperture of the corresponding indoor restricting element of refrigeration indoor unit is not up to Maximum opening then increases the aperture of the corresponding indoor restricting element of refrigeration indoor unit；If the corresponding indoor section of the indoor unit that freezes The aperture of fluid element reaches maximum opening, then reduces the aperture of the corresponding outdoor restricting element of outdoor evaporator.
Further, according to one embodiment of present invention, control module 300 is according to the work shape of each outdoor heat exchanger The degree of supercooling of state, the degree of superheat for the indoor unit that freezes and heating indoor unit is to multiple outdoor restricting elements and multiple indoor restricting elements At least one of aperture be adjusted, comprising: when a part in multiple outdoor heat exchangers is outdoor condenser, another portion When being divided into outdoor evaporator, judge whether the degree of supercooling for heating indoor unit is bigger than normal；If the degree of supercooling for heating indoor unit is bigger than normal, Increase the aperture of the corresponding outdoor restricting element of outdoor condenser.
Further, according to another embodiment of the invention, control module 300 is according to the work of each outdoor heat exchanger The degree of supercooling of state, the degree of superheat for the indoor unit that freezes and heating indoor unit is to multiple outdoor restricting elements and multiple indoor throttling members The aperture of at least one of part is adjusted, comprising: when multiple outdoor heat exchangers are outdoor evaporator, judges heating chamber Whether the degree of supercooling of interior machine is bigger than normal；When the degree of supercooling for heating indoor unit is bigger than normal, further judgement heats the corresponding room of indoor unit Whether the aperture of interior restricting element reaches maximum opening；If the aperture of the corresponding indoor restricting element of heating indoor unit is not up to Maximum opening then increases the aperture of the corresponding indoor restricting element of heating indoor unit；If heating the corresponding indoor section of indoor unit The aperture of fluid element reaches maximum opening, then increases the aperture of the corresponding outdoor restricting element of outdoor evaporator.
According to still another embodiment of the invention, working condition, refrigeration of the control module 300 according to each outdoor heat exchanger The degree of superheat of indoor unit and the degree of supercooling of heating indoor unit in multiple outdoor restricting elements and multiple indoor restricting elements extremely Few one aperture is adjusted, comprising: when multiple outdoor heat exchangers are outdoor condenser, judges the mistake of refrigeration indoor unit Whether temperature is less than normal；When the degree of superheat for the indoor unit that freezes is less than normal, the corresponding indoor throttling member of refrigeration indoor unit is further judged Whether the aperture of part reaches minimum aperture；If the aperture of the corresponding indoor restricting element of refrigeration indoor unit is not up to minimum and opens Degree then reduces the aperture of the corresponding indoor restricting element of refrigeration indoor unit；If the corresponding indoor restricting element of the indoor unit that freezes Aperture reach minimum aperture, then reduce the aperture of the corresponding outdoor restricting element of outdoor condenser.
It should be noted that undisclosed thin in the anti-refrigerant bias current control device of the multi-line system of the embodiment of the present invention Section, please refers to details disclosed in the anti-refrigerant bias current control method of the multi-line system of the embodiment of the present invention, specifically here No longer it is described in detail.
The anti-refrigerant bias current control device of multi-line system according to an embodiment of the present invention, when multi-line system is to mix system When cold heating mode is run, the degree of superheat and heating of the indoor unit that freezes in multiple indoor units are obtained respectively by the first acquisition module The degree of supercooling of indoor unit, and the working condition that module obtains each outdoor heat exchanger is obtained by second, further pass through control Module is according to the working condition of each outdoor heat exchanger, the degree of superheat for the indoor unit that freezes and heats the degree of supercooling of indoor unit to multiple The aperture of at least one of outdoor restricting element and multiple indoor restricting elements is adjusted.The device passes through to outdoor throttling The aperture of element and indoor restricting element is rationally adjusted, and can effectively avoid refrigeration indoor unit because lacking refrigerant or more refrigerants Caused by refrigerating capacity it is insufficient or the problem of return liquid.
In addition, the embodiment of the present invention also proposed a kind of multi-line system comprising above-mentioned anti-refrigerant bias current control Device.
The multi-line system of the embodiment of the present invention, by above-mentioned anti-refrigerant bias current control device, by outdoor throttling The aperture of element and indoor restricting element is rationally adjusted, and can effectively avoid refrigeration indoor unit because lacking refrigerant or more refrigerants Caused by refrigerating capacity it is insufficient or the problem of return liquid.
It should be appreciated that each section of the invention can be realized with hardware, software, firmware or their combination.Above-mentioned In embodiment, software that multiple steps or method can be executed in memory and by suitable instruction execution system with storage Or firmware is realized.It, and in another embodiment, can be under well known in the art for example, if realized with hardware Any one of column technology or their combination are realized: having a logic gates for realizing logic function to data-signal Discrete logic, with suitable combinational logic gate circuit specific integrated circuit, programmable gate array (PGA), scene Programmable gate array (FPGA) etc..
In addition, in the description of the present invention, term " center ", " longitudinal direction ", " transverse direction ", " length ", " width ", " thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom" "inner", "outside", " clockwise ", " inverse time The orientation or positional relationship of the instructions such as needle ", " axial direction ", " radial direction ", " circumferential direction " is to be based on the orientation or positional relationship shown in the drawings, Be merely for convenience of description of the present invention and simplification of the description, rather than the device or element of indication or suggestion meaning must have it is specific Orientation, be constructed and operated in a specific orientation, therefore be not considered as limiting the invention.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or Implicitly include at least one this feature.In the description of the present invention, the meaning of " plurality " is at least two, such as two, three It is a etc., unless otherwise specifically defined.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " fixation " etc. Term shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；It can be mechanical connect It connects, is also possible to be electrically connected；It can be directly connected, can also can be in two elements indirectly connected through an intermediary The interaction relationship of the connection in portion or two elements, unless otherwise restricted clearly.For those of ordinary skill in the art For, the specific meanings of the above terms in the present invention can be understood according to specific conditions.
In the present invention unless specifically defined or limited otherwise, fisrt feature in the second feature " on " or " down " can be with It is that the first and second features directly contact or the first and second features pass through intermediary mediate contact.Moreover, fisrt feature exists Second feature " on ", " top " and " above " but fisrt feature be directly above or diagonally above the second feature, or be merely representative of First feature horizontal height is higher than second feature.Fisrt feature can be under the second feature " below ", " below " and " below " One feature is directly under or diagonally below the second feature, or is merely representative of first feature horizontal height less than second feature.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not It must be directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be in office It can be combined in any suitable manner in one or more embodiment or examples.In addition, without conflicting with each other, the skill of this field Art personnel can tie the feature of different embodiments or examples described in this specification and different embodiments or examples It closes and combines.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example Property, it is not considered as limiting the invention, those skilled in the art within the scope of the invention can be to above-mentioned Embodiment is changed, modifies, replacement and variant.

Claims (12)

1. a kind of anti-refrigerant bias current control method of multi-line system, which is characterized in that the multi-line system include outdoor unit, Multiple indoor units and part flow arrangement, the outdoor unit include the first four-way valve, multiple outdoor heat exchangers, change respectively with each outdoor The second four-way valve that hot device is correspondingly arranged, the outdoor restricting element being correspondingly arranged respectively with each outdoor heat exchanger, it is each described Indoor unit includes the indoor restricting element of indoor heat exchanger and corresponding indoor heat exchanger setting, wherein each interior is changed One end of hot device is connected by corresponding indoor restricting element and the first pipeline with each outdoor restricting element, each described The other end of indoor heat exchanger is connected by the second pipeline with the first port of first four-way valve, and pass through third pipeline and The second port of first four-way valve is connected, the anti-refrigerant bias current control method the following steps are included:
When the multi-line system is with the operation of hybrid refrigeration heating mode, obtained in the multiple indoor unit respectively in cool room The degree of superheat of machine and the degree of supercooling of heating indoor unit；
Obtain the working condition of each outdoor heat exchanger；
According to the working condition of each outdoor heat exchanger, the degree of superheat of the refrigeration indoor unit and the heating indoor unit The aperture of at least one of multiple outdoor restricting elements and multiple indoor restricting elements is adjusted in degree of supercooling.
2. the anti-refrigerant bias current control method of multi-line system according to claim 1, which is characterized in that according to each institute The degree of supercooling of the working condition of outdoor heat exchanger, the degree of superheat of the refrigeration indoor unit and the heating indoor unit is stated to multiple institutes The aperture for stating at least one of outdoor restricting element and multiple indoor restricting elements is adjusted, comprising:
When at least one of the multiple outdoor heat exchanger is outdoor evaporator, the degree of superheat of the refrigeration indoor unit is judged It is whether bigger than normal；
When the degree of superheat of the refrigeration indoor unit is bigger than normal, the corresponding indoor restricting element of the refrigeration indoor unit is further judged Aperture whether reach maximum opening；
If the aperture of the corresponding indoor restricting element of the refrigeration indoor unit is not up to maximum opening, increase the cool room The aperture of the corresponding indoor restricting element of interior machine；
If the aperture of the corresponding indoor restricting element of the refrigeration indoor unit reaches maximum opening, reduce the outdoor evaporation The aperture of the corresponding outdoor restricting element of device.
3. the anti-refrigerant bias current control method of multi-line system according to claim 2, which is characterized in that according to each institute The degree of supercooling of the working condition of outdoor heat exchanger, the degree of superheat of the refrigeration indoor unit and the heating indoor unit is stated to multiple institutes The aperture for stating at least one of outdoor restricting element and multiple indoor restricting elements is adjusted, comprising:
When a part in the multiple outdoor heat exchanger is outdoor condenser, another part is outdoor evaporator, institute is judged Whether the degree of supercooling for stating heating indoor unit is bigger than normal；
If the degree of supercooling of the heating indoor unit is bigger than normal, increase opening for the outdoor corresponding outdoor restricting element of condenser Degree.
4. the anti-refrigerant bias current control method of multi-line system according to claim 2, which is characterized in that according to each institute The degree of supercooling of the working condition of outdoor heat exchanger, the degree of superheat of the refrigeration indoor unit and the heating indoor unit is stated to multiple institutes The aperture for stating at least one of outdoor restricting element and multiple indoor restricting elements is adjusted, comprising:
When the multiple outdoor heat exchanger is outdoor evaporator, judge whether the degree of supercooling of the heating indoor unit is bigger than normal；
When the degree of supercooling of the heating indoor unit is bigger than normal, the corresponding indoor restricting element of the heating indoor unit is further judged Aperture whether reach maximum opening；
If the aperture for heating the corresponding indoor restricting element of indoor unit is not up to maximum opening, increase the heating chamber The aperture of the corresponding indoor restricting element of interior machine；
If the aperture for heating the corresponding indoor restricting element of indoor unit reaches maximum opening, increase the outdoor evaporation The aperture of the corresponding outdoor restricting element of device.
5. the anti-refrigerant bias current control method of multi-line system according to claim 1, which is characterized in that according to each institute The degree of supercooling of the working condition of outdoor heat exchanger, the degree of superheat of the refrigeration indoor unit and the heating indoor unit is stated to multiple institutes The aperture for stating at least one of outdoor restricting element and multiple indoor restricting elements is adjusted, comprising:
When the multiple outdoor heat exchanger is outdoor condenser, judge whether the degree of superheat of the refrigeration indoor unit is less than normal；
When the degree of superheat of the refrigeration indoor unit is less than normal, the corresponding indoor restricting element of the refrigeration indoor unit is further judged Aperture whether reach minimum aperture；
If the aperture of the corresponding indoor restricting element of the refrigeration indoor unit is not up to minimum aperture, reduce the cool room The aperture of the corresponding indoor restricting element of interior machine；
If the aperture of the corresponding indoor restricting element of the refrigeration indoor unit reaches minimum aperture, reduce the outdoor condensation The aperture of the corresponding outdoor restricting element of device.
6. a kind of computer readable storage medium, which is characterized in that have and be stored in instruction therein, when described instruction is performed When, multi-line system executes anti-refrigerant bias current control method according to any one of claims 1 to 5.
7. a kind of anti-refrigerant bias current control device of multi-line system, which is characterized in that the multi-line system include outdoor unit, Multiple indoor units and part flow arrangement, the outdoor unit include the first four-way valve, multiple outdoor heat exchangers, change respectively with each outdoor The second four-way valve that hot device is correspondingly arranged, the outdoor restricting element being correspondingly arranged respectively with each outdoor heat exchanger, it is each described Indoor unit includes the indoor restricting element of indoor heat exchanger and corresponding indoor heat exchanger setting, wherein each interior is changed One end of hot device is connected by corresponding indoor restricting element and the first pipeline with each outdoor restricting element, each described The other end of indoor heat exchanger is connected by the second pipeline with the first port of first four-way valve, and pass through third pipeline and The second port of first four-way valve is connected, and the anti-refrigerant bias current control device includes:
First obtains module, for obtaining respectively described more when the multi-line system is with the operation of hybrid refrigeration heating mode The degree of superheat of indoor unit of freezing in a indoor unit and the degree of supercooling of heating indoor unit；
Second obtains module, for obtaining the working condition of each outdoor heat exchanger；
Control module, for according to the working condition of each outdoor heat exchanger, the degree of superheat of the refrigeration indoor unit and institute The degree of supercooling of heating indoor unit is stated at least one of multiple outdoor restricting elements and multiple indoor restricting elements Aperture be adjusted.
8. the anti-refrigerant bias current control device of multi-line system according to claim 7, which is characterized in that the control mould Root tuber is according to the working condition of each outdoor heat exchanger, the mistake of the degree of superheat of the refrigeration indoor unit and the heating indoor unit The aperture of at least one of multiple outdoor restricting elements and multiple indoor restricting elements is adjusted in cold degree, wraps It includes:
When at least one of the multiple outdoor heat exchanger is outdoor evaporator, the degree of superheat of the refrigeration indoor unit is judged It is whether bigger than normal；
When the degree of superheat of the refrigeration indoor unit is bigger than normal, the corresponding indoor restricting element of the refrigeration indoor unit is further judged Aperture whether reach maximum opening；
If the aperture of the corresponding indoor restricting element of the refrigeration indoor unit is not up to maximum opening, increase the cool room The aperture of the corresponding indoor restricting element of interior machine；
If the aperture of the corresponding indoor restricting element of the refrigeration indoor unit reaches maximum opening, reduce the outdoor evaporation The aperture of the corresponding outdoor restricting element of device.
9. the anti-refrigerant bias current control device of multi-line system according to claim 8, which is characterized in that the control mould Root tuber is according to the working condition of each outdoor heat exchanger, the mistake of the degree of superheat of the refrigeration indoor unit and the heating indoor unit The aperture of at least one of multiple outdoor restricting elements and multiple indoor restricting elements is adjusted in cold degree, wraps It includes:
When a part in the multiple outdoor heat exchanger is outdoor condenser, another part is outdoor evaporator, institute is judged Whether the degree of supercooling for stating heating indoor unit is bigger than normal；
If the degree of supercooling of the heating indoor unit is bigger than normal, increase opening for the outdoor corresponding outdoor restricting element of condenser Degree.
10. the anti-refrigerant bias current control device of multi-line system according to claim 8, which is characterized in that the control Module is according to the working condition of each outdoor heat exchanger, the degree of superheat of the refrigeration indoor unit and the heating indoor unit The aperture of at least one of multiple outdoor restricting elements and multiple indoor restricting elements is adjusted in degree of supercooling, Include:
When the multiple outdoor heat exchanger is outdoor evaporator, judge whether the degree of supercooling of the heating indoor unit is bigger than normal；
When the degree of supercooling of the heating indoor unit is bigger than normal, the corresponding indoor restricting element of the heating indoor unit is further judged Aperture whether reach maximum opening；
If the aperture for heating the corresponding indoor restricting element of indoor unit is not up to maximum opening, increase the heating chamber The aperture of the corresponding indoor restricting element of interior machine；
If the aperture for heating the corresponding indoor restricting element of indoor unit reaches maximum opening, increase the outdoor evaporation The aperture of the corresponding outdoor restricting element of device.
11. the anti-refrigerant bias current control device of multi-line system according to claim 7, which is characterized in that the control Module is according to the working condition of each outdoor heat exchanger, the degree of superheat of the refrigeration indoor unit and the heating indoor unit The aperture of at least one of multiple outdoor restricting elements and multiple indoor restricting elements is adjusted in degree of supercooling, Include:
When the multiple outdoor heat exchanger is outdoor condenser, judge whether the degree of superheat of the refrigeration indoor unit is less than normal；
When the degree of superheat of the refrigeration indoor unit is less than normal, the corresponding indoor restricting element of the refrigeration indoor unit is further judged Aperture whether reach minimum aperture；
If the aperture of the corresponding indoor restricting element of the refrigeration indoor unit is not up to minimum aperture, reduce the cool room The aperture of the corresponding indoor restricting element of interior machine；
If the aperture of the corresponding indoor restricting element of the refrigeration indoor unit reaches minimum aperture, reduce the outdoor condensation The aperture of the corresponding outdoor restricting element of device.
12. a kind of multi-line system, which is characterized in that including described in any item anti-refrigerant bias current controls as claim in claims 7-11 Device processed.
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