CN104764243B - multiple on-line system - Google Patents
multiple on-line system Download PDFInfo
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- CN104764243B CN104764243B CN201510148928.9A CN201510148928A CN104764243B CN 104764243 B CN104764243 B CN 104764243B CN 201510148928 A CN201510148928 A CN 201510148928A CN 104764243 B CN104764243 B CN 104764243B
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- gas
- liquid separator
- line system
- flow arrangement
- part flow
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B13/00—Compression machines, plants or systems, with reversible cycle
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/31—Expansion valves
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
Abstract
The invention discloses a kind of multiple on-line system, which includes off-premises station device, part flow arrangement, multiple indoor units, wherein, the part flow arrangement includes gas-liquid separator, first heat-exchanging component, first electric expansion valve, second heat-exchanging component and the second electric expansion valve, the part flow arrangement is used for the degree of superheat of the gas vent for obtaining the gas-liquid separator, and when the degree of superheat of the gas vent of the gas-liquid separator is more than predetermined threshold value, the part flow arrangement sends fluid infusion instruction to the off-premises station device, so that the off-premises station device is instructed according to the fluid infusion improves wind shelves.When the multiple on-line system can judge that the liquid refrigerants needed for refrigeration indoor set is not enough exactly, fluid infusion control is carried out in time, so as to improve refrigeration.
Description
Technical field
The present invention relates to air-conditioning technical field, more particularly to a kind of multiple on-line system.
Background technology
With the continuous development of air-conditioning technical and the reinforcement of people's environmental consciousness, heat-reclamation multi-compressors system is increasingly received
Welcome to market.And two-pipe heat-reclamation multi-compressors system be in the market in main flow heat-reclamation multi-compressors system one
Kind, wherein, two-pipe heat-reclamation multi-compressors system can be realized while cooling and warming, for the interior machine of refrigeration from performance and comfortableness
Before angle consideration requirement throttling, refrigerant is liquid, and when the interior machine demand liquid refrigerants that freezes in system is not enough, how in time
The liquid refrigerants for freezing is supplemented from outer machine, be technical problem urgently to be resolved hurrily.
Content of the invention
The purpose of the present invention is intended at least solve one of above-mentioned technical problem.
For this purpose, it is an object of the invention to a kind of multiple on-line system of proposition, can judge to freeze needed for indoor set exactly
Liquid refrigerants not enough when, carry out fluid infusion control in time, so as to improve refrigeration.
For reaching above-mentioned purpose, embodiments of the invention propose a kind of multiple on-line system, including off-premises station device, shunting
Device, multiple indoor units, wherein, the part flow arrangement includes gas-liquid separator, the first heat-exchanging component, the first electronic expansion
Valve, the second heat-exchanging component and the second electric expansion valve, the part flow arrangement are used for obtaining the gas vent of the gas-liquid separator
The degree of superheat, and the gas-liquid separator gas vent the degree of superheat more than predetermined threshold value when, the part flow arrangement is to institute
State off-premises station device and fluid infusion instruction is sent, so that the off-premises station device is instructed according to the fluid infusion improves wind shelves.
Multiple on-line system according to embodiments of the present invention, obtains the mistake of the gas vent of gas-liquid separator by part flow arrangement
Temperature, and gas-liquid separator gas vent the degree of superheat more than predetermined threshold value when, part flow arrangement judges to need fluid infusion, and to
Off-premises station device sends fluid infusion instruction, so that off-premises station device can improve wind shelves in time according to fluid infusion instruction, therefore, it is possible to standard
Really judge whether refrigeration indoor set lacks the liquid refrigerants for freezing, and enable off-premises station device indoor to refrigeration in time
Machine supplements liquid refrigerants, so as to improve refrigeration.
According to one embodiment of present invention, the gas outlet of the gas-liquid separator is detected by pressure sensor
Pressure value, and the temperature value of the gas outlet of the gas-liquid separator is detected by temperature sensor, the part flow arrangement root
The temperature value that the pressure value detected according to the pressure sensor and the temperature sensor are detected calculates the gas-liquid separation
The degree of superheat of the gas vent of device.
Wherein, the part flow arrangement calculates the degree of superheat of the gas vent of the gas-liquid separator according to below equation:
SH1=Ts-Tc
Wherein, SH1 is the degree of superheat of the gas vent of the gas-liquid separator, and Ts is that the gas of the gas-liquid separator goes out
The corresponding saturation temperature of pressure at mouthful, Tc is the temperature of the gas outlet of the gas-liquid separator.
Preferably, the predetermined threshold value can be 2-4 degree.
According to one embodiment of present invention, multiple on-line system work cooling and warming pattern at the same time.
Wherein, described while cooling and warming pattern includes main refrigeration mode and main heating mode.
In an embodiment of the present invention, after first Preset Time of multiple on-line system startup optimization, the shunting dress
Put the degree of superheat of the gas vent for starting to obtain the gas-liquid separator.
Specifically, first Preset Time can be 10-20 minute.
The aspect that the present invention is added and advantage will be set forth in part in the description, and partly will become from the following description
Obtain substantially, or recognized by the practice of the present invention.
Description of the drawings
The above-mentioned and/or additional aspect of the present invention and advantage will become from the following description of the accompanying drawings of embodiments
Substantially and easy to understand, wherein:
Fig. 1 is the system schematic of the multiple on-line system according to one embodiment of the invention;
Fig. 2 is system schematic when running on pure heating mode according to the multiple on-line system of one embodiment of the invention;
Fig. 3 is system schematic when running on main heating mode according to the multiple on-line system of one embodiment of the invention;
Fig. 4 is system schematic when running on pure refrigeration mode according to the multiple on-line system of one embodiment of the invention;
Fig. 5 is schematic diagram when running on main refrigeration mode according to the multiple on-line system of one embodiment of the invention;And
Fig. 6 is the communication network figure of the multiple on-line system according to one embodiment of the invention.
Specific embodiment
Embodiments of the invention are described below in detail, the example of the embodiment is shown in the drawings, wherein from start to finish
Same or similar label represents same or similar element or the element with same or like function.Below with reference to attached
The embodiment of figure description is exemplary, is only used for explaining the present invention, and is not construed as limiting the claims.
With reference to the accompanying drawings describing the multiple on-line system of proposition according to embodiments of the present invention.
As shown in Figures 1 to 5, the multiple on-line system of the embodiment of the present invention includes:Off-premises station device 10, multiple indoor set dresses
Put such as four indoor units 21,22,23,24, and part flow arrangement 30.
Wherein, off-premises station device 10 includes compressor 101, cross valve 102, outdoor heat exchanger 103, outer machine gas-liquid separator
104th, oil eliminator 105, the first magnetic valve 106, capillary 107, four check valves 108A, 108B, 108C, 108D, Yi Ji
One interface 109 and second interface 110.Compressor 101 has first to fourth valve with exhaust outlet and gas returning port, cross valve 102
Mouthful, the first valve port is connected with one of in the second valve port and the 3rd valve port, the 4th valve port and the second valve port and the 3rd valve port
In another connection, the first valve port is connected with the exhaust outlet of compressor 101 by oil eliminator 105, and the 4th valve port passes through outward
Machine gas-liquid separator 104 is connected with the gas returning port of compressor 101, is in series with check valve between the second valve port and first interface 109
108A, the 3rd valve port are connected with the first end of outdoor heat exchanger 103.
Part flow arrangement 30 includes gas-liquid separator 301, such as four the first control valves 302A of multiple first control valves,
302B, 302C, 302D, multiple second control valves such as four the second control valves 303A, 303B, 303C, 303D, the first electronics are swollen
Swollen valve 304A, the second electric expansion valve 304B, four first check valves 305A, 305B, 305C, 305D, four the second check valves
306A, 306B, 306C, 306D, the first heat-exchanging component 307A and the second heat-exchanging component 307B.Wherein, gas-liquid separator 301 has
Entrance, gas vent and liquid outlet, entrance by high-pressure stop valve 40, check valve 108B and outdoor heat exchanger 103 second
End is connected, and gas vent is connected with four the second control valves 303A, 303B, 303C, 303D respectively;Four the first control valves
302A, 302B, 302C, 302D are connected with first interface 109 by low-pressure shutoff valve 50 respectively.First heat-exchanging component 307A and
Two heat-exchanging component 307B can be plate type heat exchanger, or double-tube heat exchanger.
As shown in Figures 1 to 5, the first end of check valve 108A is connected to check valve 108B and second by check valve 108C
Between interface 110, second end of check valve 108A by check valve 108D be connected to check valve 108B and outdoor heat exchanger 103 it
Between.
First heat-exchanging component 307A and the second heat-exchanging component 307B are respectively provided with the first heat exchange stream and the second heat exchange stream,
The liquid outlet of Gas and liquid flow diverter 301 is connected with the first heat exchange stream of the first heat-exchanging component 307A, the first heat-exchanging component 307A
The first heat exchange stream be connected with the first electric expansion valve 304A, the second heat exchange stream of the first heat-exchanging component 307A is respectively with
The second heat exchange stream of two heat-exchanging component 307B and four the first control valves 302A, 302B, 302C, 302D are connected.
As shown in Figures 1 to 5, each indoor unit all includes indoor heat exchanger and restricting element, and wherein, indoor set is filled
Putting 21 includes indoor heat exchanger 211 and restricting element 212, and indoor unit 22 includes indoor heat exchanger 221 and restricting element
222, indoor unit 23 includes indoor heat exchanger 231 and restricting element 232, and indoor unit 24 includes indoor heat exchanger 241
With restricting element 242.The first end of the indoor heat exchanger in each indoor unit is connected with corresponding restricting element, each room
Second end of the indoor heat exchanger in interior machine device is connected with corresponding first control valve and the second control valve, each indoor set dress
Restricting element in putting is connected with corresponding first check valve and the second check valve, the flow direction of the first check valve and the second check valve
On the contrary.Also, four first check valves 305A, 305B, 305C, 305D are connected to the first public channel, four second unidirectional
Valve 306A, 306B, 306C, 306D are connected to the second public channel, the first heat exchange stream difference of the second heat-exchanging component 307B
Connect with the first public channel and the second public channel, the first electric expansion valve 304A is connected to the first public channel, the second electricity
Sub- expansion valve 304B is connected with the second heat exchange stream of the second heat-exchanging component 307B and the second public channel respectively, and the first electronics is swollen
Swollen valve 304A is also parallel with the second magnetic valve 308.
In an embodiment of the present invention, part flow arrangement 30 is used for the degree of superheat of the gas vent for obtaining gas-liquid separator 301,
And gas-liquid separator 301 gas vent the degree of superheat more than predetermined threshold value when, part flow arrangement 30 is to 10, off-premises station device
Send fluid infusion to instruct, so that off-premises station device 10 is instructed according to fluid infusion, and wind shelves are improved, realize timely fluid infusion control.Wherein, threshold is preset
Value can be 2-4 degree.
According to one embodiment of present invention, as shown in Figures 1 to 5, also in the first in parallel electric expansion valve 304A and
The two ends of the second magnetic valve 308 are respectively provided with pressure sensor 309A and pressure sensor 309B, and in the second heat-exchanging component
The two ends of the first heat exchange stream of 307B are also respectively provided with temperature sensor 310A and temperature sensor 310B.Additionally, also
One end of the second heat exchange stream of one heat-exchanging component 307A arranges pressure sensor 309C.
Also, also temperature sensor and pressure sensor can be set in the gas outlet of gas-liquid separator, by arranging
In the pressure value of the gas outlet of the pressure sensor detection gas-liquid separator of the gas outlet of gas-liquid separator, and pass through
Be arranged on the gas outlet of gas-liquid separator temperature sensor detect the gas-liquid separator gas outlet temperature
Value, the pressure value that such part flow arrangement 30 is detected according to the two sensors and the gas of temperature value calculating gas-liquid separator go out
The degree of superheat of mouth.
According to one embodiment of present invention, the part flow arrangement calculates the gas of the gas-liquid separator according to below equation
The degree of superheat of body outlet:
SH1=Ts-Tc
Wherein, SH1 is the degree of superheat of the gas vent of gas-liquid separator, and Ts is the pressure of the gas outlet of gas-liquid separator
The corresponding saturation temperature of power, Tc are the temperature of the gas outlet of gas-liquid separator.
In an embodiment of the present invention, multiple on-line system work at the same time cooling and warming pattern when carry out fluid infusion control.
Wherein, while cooling and warming pattern includes main refrigeration mode and main heating mode.It should be noted that the operation of multiple on-line system
Pattern also includes pure refrigeration mode and pure heating mode.
Multiple on-line system is just respectively described below with reference to Fig. 2 to Fig. 5 and is operated in pure heating mode, main heating mode, pure
Refrigerant flow direction when refrigeration mode and main refrigeration mode.
As shown in Fig. 2 when off-premises station device 10 judges that multiple on-line system is operated in pure heating mode, now four indoor sets
Device carries out heating work.Wherein, refrigerant flow direction is:Gases at high pressure are from the exhaust outlet of compressor 101 through oil eliminator 105 to four
Port valve 102, then through check valve 108C, second interface 110, high-pressure stop valve 40 arrive gas-liquid separator 301, gases at high pressure from
The gas vent of gas-liquid separator 301 is respectively through four the second control valves 303A, 303B, 303C, 303D to corresponding four
Indoor heat exchanger, becomes highly pressurised liquid, and then four road highly pressurised liquids are through corresponding restricting element and four the first check valves
305A, 305B, 305C, 305D to the first heat exchange stream of the second heat-exchanging component 307B, through the secondth electric expansion valve 304B
Become low-pressure gas-liquid two-phase, low-pressure gas-liquid two-phase is through the second heat exchange stream and first heat-exchanging component of the second heat-exchanging component 307B
The second heat exchange stream of 307A returns to off-premises station device 10, i.e. low-pressure gas-liquid two-phase by low-pressure shutoff valve 50, first interface
109th, check valve 108D becomes low-pressure gas after returning to outdoor heat exchanger 103, and low-pressure gas passes through cross valve 102, outer machine gas-liquid
Separator 104 returns to the gas returning port of compressor 101.
As shown in figure 3, when off-premises station device 10 judges that multiple on-line system is operated in main heating mode, now four indoor sets
Three indoor units are had to carry out heating work in device, an indoor unit carries out refrigeration work.Wherein, for heating
Refrigerant is flowed to:Gases at high pressure from the exhaust outlet of compressor 101 through oil eliminator 105 to cross valve 102, then through check valve
108C, second interface 110, high-pressure stop valve 40 arrive gas-liquid separator 301, and gases at high pressure go out from the gas of gas-liquid separator 301
Mouth is respectively through three the second control valves 303A, 303B, 303C to the corresponding three indoor heat exchange heated in indoor unit
Device, becomes highly pressurised liquid, then three road highly pressurised liquids through corresponding restricting element and three the first check valve 305A, 305B,
The first heat exchange stream of the heat-exchanging component 307B of 305C to second, becomes low-pressure gas-liquid two through the secondth electric expansion valve 304B
Phase, the second heat exchange of second heat exchange stream and first heat-exchanging component 307A of the low-pressure gas-liquid two-phase through the second heat-exchanging component 307B
Stream is returned to off-premises station device 10, i.e. low-pressure gas-liquid two-phase and is returned by low-pressure shutoff valve 50, first interface 109, check valve 108D
Become low-pressure gas to after outdoor heat exchanger 103, low-pressure gas returns to compression by cross valve 102, outer machine gas-liquid separator 104
The gas returning port of machine 101.Refrigerant for freezing flows to and is:High pressure liquid through the first heat exchange stream of the second heat-exchanging component 307B
A part for body flows to the restricting element 242 in indoor unit 24 also by the second check valve 306D, becomes low-pressure gas-liquid two
Phase, then become low-pressure gas after the indoor heat exchanger 241 in indoor unit 24, the low-pressure gas is through the first control valve
With the second heat exchange stream of the second heat exchange stream through the second heat-exchanging component 307B and the first heat-exchanging component 307A after 302D
After low-pressure gas-liquid two-phase mixtures, off-premises station device 10 is returned to.
As shown in figure 4, when off-premises station device 10 judges that multiple on-line system is operated in pure refrigeration mode, now four indoor sets
Device carries out refrigeration work.Wherein, refrigerant flow direction is:Gases at high pressure are from the exhaust outlet of compressor 101 through oil eliminator 105 to four
Port valve 102, then becomes highly pressurised liquid after outdoor heat exchanger 103, and highly pressurised liquid is through check valve 108B, second interface
110th, high-pressure stop valve 40 arrives gas-liquid separator 301, and highly pressurised liquid is from the liquid outlet of gas-liquid separator 301 through the first heat exchange
The first heat exchange stream of component 307A to the first electric expansion valve 304A and the second magnetic valve 308, then through the second heat exchange group
The first heat exchange stream of part 307B is respectively to four second check valves 306A, 306B, 306C, 306D, second unidirectional through four
The four road highly pressurised liquids of valve 306A, 306B, 306C, 306D are corresponded to respectively and are become after the restricting element in four indoor units
Cheng Silu low-pressure gas-liquid two-phase, four road low-pressure gas-liquid two-phases are respectively through becoming four tunnel low pressure gas after corresponding indoor heat exchanger
Body, then correspond to through four the first control valves 302A, 302B, 302C, 302D return to off-premises station device 10, i.e. low-pressure gas lead to
Cross the gas returning port that low-pressure shutoff valve 50, first interface 109, check valve 108A, outer machine gas-liquid separator 104 return to compressor 101.
As shown in figure 5, when off-premises station device 10 judges that multiple on-line system is operated in main refrigeration mode, now four indoor sets
Three indoor units are had to carry out refrigeration work in device, an indoor unit carries out heating work.Wherein, for refrigeration
Refrigerant is flowed to:Then gases at high pressure are changed through outdoor from the exhaust outlet of compressor 101 through oil eliminator 105 to cross valve 102
Become high-pressure gas-liquid two-phase after hot device 103, high-pressure gas-liquid two-phase is through check valve 108B, second interface 110, high-pressure stop valve 40
Gas-liquid separation is carried out to gas-liquid separator 301, wherein, highly pressurised liquid is changed from the liquid outlet of gas-liquid separator 301 through first
The first heat exchange stream of hot component 307A to the first electric expansion valve 304A and the second magnetic valve 308, then through the second heat exchange
The first heat exchange stream of component 307B respectively to three second check valves 306A, 306B, 306C, through three the second check valves
Correspondence becomes three tunnels after the restricting element in three indoor units to the three road highly pressurised liquids of 306A, 306B, 306C respectively
Low-pressure gas-liquid two-phase, three road low-pressure gas-liquid two-phases respectively through three road low-pressure gases are become after corresponding indoor heat exchanger, then
Correspond to off-premises station device 10, i.e. low-pressure gas is returned to by low-pressure shutoff valve through three the first control valves 302A, 302B, 302C
50th, first interface 109, check valve 108A, outer machine gas-liquid separator 104 return to the gas returning port of compressor 101.Cold for heated
Matchmaker flows to:The gases at high pressure of gas-liquid separation are carried out from the gas vent of gas-liquid separator 301 through through gas-liquid separator 301
Indoor heat exchanger 241 of two control valves 303D in indoor unit 24, becomes highly pressurised liquid, and highly pressurised liquid is filled through indoor set
Put by the first check valve 305D and the first heat exchange stream through the second heat-exchanging component 307B after the restricting element 242 in 24
Highly pressurised liquid converges.
In an embodiment of the present invention, in order to realize automatically controlling pressure differential deltap P before and after the first electric expansion valve 304A, per
Individual indoor unit is required to send the operational factor of indoor unit, wherein, each indoor unit to part flow arrangement 30
Operational factor includes:The operational mode (such as refrigeration mode, heating mode etc.) of indoor unit, indoor unit are used as in refrigeration
The degree of superheat, indoor unit during machine as refrigeration in machine when restricting element aperture, indoor unit as interior machine is heated when
Degree of supercooling, indoor unit is used as restricting element aperture when heating interior machine etc..
According to one embodiment of present invention, as shown in fig. 6, directly can be led between off-premises station device and part flow arrangement
News, each indoor unit are communicated with off-premises station device by part flow arrangement.Wherein, each indoor unit is assigned one
Individual address, the communication between the communication being easy between each indoor unit and each indoor unit and part flow arrangement, example
As the first indoor unit is assigned the first address, the second indoor unit is assigned the second address ..., the 7th indoor unit
It is assigned the 7th address.In addition, each indoor unit also includes line control machine, each indoor unit also with respective line control machine
Communicated.
Further, according to a specific example of the present invention, the off-premises station control unit in off-premises station device and shunting
Control module in device is communicated, while the control module in part flow arrangement and the indoor set control in each indoor unit
Unit processed is communicated.Wherein, the off-premises station control unit in off-premises station device obtains the temperature information of off-premises station device in real time
(such as off-premises station device local environment temperature, delivery temperature, suction temperature, heat exchange temperature etc.), pressure information are (as exhaust pressure
Power, back pressure etc.) and the operational mode of each indoor unit etc. that sends of multiple indoor units judging multi-connected machine
The operational mode (for example pure heating mode, main heating mode, pure refrigeration mode and main refrigeration mode) of system, and by multi-connected machine system
The instruction of the operational mode of system is sent to part flow arrangement.Meanwhile, the off-premises station control unit in off-premises station device is always according to inside
Control compressor and outdoor fan etc. the part operation of logic output instruction signal.
Specifically, after multiple on-line system starts, the off-premises station control unit in off-premises station device obtains off-premises station device
Ambient temperature information, pressure information and each indoor unit operational mode, judge the operation mould of multiple on-line system
Formula, for example, when each indoor unit all runs on refrigeration mode, multiple on-line system operational mode is pure refrigeration mode;When
When each indoor unit all runs on heating mode, multiple on-line system operational mode is pure heating mode;When multiple indoor sets
In device, existing when running on refrigeration mode and also running on heating mode, multiple on-line system operational mode is for while refrigerated medium
Heat pattern, off-premises station device send corresponding modes according to the system running pattern for judging and instruct to part flow arrangement.Meanwhile, off-premises station
Device controls the operation of the part such as compressor and outdoor fan according to internal logic output instruction signal.Part flow arrangement is according to off-premises station
The given mode instruction of device carries out the control of each state parameter.
Also, after the first Preset Time of multiple on-line system startup optimization, part flow arrangement 30 starts to obtain gas-liquid separator
Gas vent the degree of superheat.Wherein, the first Preset Time can be 10-20 minute, it is preferable that can be 15 minutes.
That is, when multiple on-line system operational mode is for cooling and warming pattern simultaneously, multiple on-line system is in the pattern
Under initial operating stage such as 15 minutes in, the degree of superheat of the part flow arrangement not to the gas vent of gas-liquid separator is obtained, this
When, the indoor unit for running on refrigeration mode freezes interior machine according to certain super heat value SH to corresponding throttling unit
Part carries out PI (Proportional Integral, proportional integral) control, and the indoor unit for running on heating mode is heated
Interior machine carries out PI control according to certain supercooling angle value SC to corresponding restricting element, meanwhile, in refrigeration, machine is by the degree of superheat
The aperture of value SH and restricting element is sent to part flow arrangement at set intervals, and heating interior machine also will supercooling angle value SC and throttling unit
The aperture of part is sent to part flow arrangement at set intervals.
When multiple on-line system is run on while when the time of cooling and warming pattern was more than 15 minutes, part flow arrangement can basis
It is arranged on the pressure sensor pressure value for detecting of the gas outlet of gas-liquid separator and the gas for being arranged on gas-liquid separator
The temperature value that the temperature sensor in body exit is detected calculates degree of superheat SH1 of the gas vent of gas-liquid separator, shunting dress
Put and judge whether to need fluid infusion according to degree of superheat SH1 of the gas vent of calculated gas-liquid separator.If gas-liquid separation
Degree of superheat SH1 of the gas vent of device is more than such as 3 degree of predetermined threshold value, then part flow arrangement judges to need fluid infusion.Part flow arrangement 30
Fluid infusion instruction is sent to off-premises station device 10, off-premises station device 10 improves outdoor after fluid infusion instruction is received according to fluid infusion instruction
The operation wind shelves of blower fan, it is ensured that fluid infusion in time.
Multiple on-line system according to embodiments of the present invention, obtains the mistake of the gas vent of gas-liquid separator by part flow arrangement
Temperature, and gas-liquid separator gas vent the degree of superheat more than predetermined threshold value when, part flow arrangement judges to need fluid infusion, and to
Off-premises station device sends fluid infusion instruction, so that off-premises station device can improve wind shelves in time according to fluid infusion instruction, therefore, it is possible to standard
Really judge whether refrigeration indoor set lacks the liquid refrigerants for freezing, and enable off-premises station device indoor to refrigeration in time
Machine supplements liquid refrigerants, so as to improve refrigeration.
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 the spy described with reference to the embodiment or example
Point is contained at least one embodiment or the example of the present invention.In this manual, to the schematic representation of above-mentioned term not
Identical embodiment or example are necessarily referred to.And, the specific features of description, structure, material or feature can be any
One or more embodiments or example in combine in an appropriate manner.
Although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, permissible
Understanding can carry out multiple changes, modification, replacement to these embodiments without departing from the principles and spirit of the present invention
And modification, the scope of the present invention by claims and its equivalent limit.
Claims (8)
1. a kind of multiple on-line system, it is characterised in that including off-premises station device, part flow arrangement, multiple indoor units, wherein,
The part flow arrangement includes gas-liquid separator, the first heat-exchanging component, the first electric expansion valve, the second heat-exchanging component and second
Electric expansion valve, the part flow arrangement are used for the degree of superheat of the gas vent for obtaining the gas-liquid separator, and in the gas-liquid
When the degree of superheat of the gas vent of separator is more than predetermined threshold value, the part flow arrangement sends fluid infusion to the off-premises station device and refers to
Order, so that the off-premises station device is instructed according to the fluid infusion improves wind shelves.
2. multiple on-line system as claimed in claim 1, it is characterised in that the gas-liquid separator is detected by pressure sensor
Gas outlet pressure value, and detect the temperature value of the gas outlet of the gas-liquid separator by temperature sensor,
The pressure value that the part flow arrangement is detected according to the pressure sensor and the temperature value meter that the temperature sensor is detected
Calculate the degree of superheat of the gas vent of the gas-liquid separator.
3. multiple on-line system as claimed in claim 2, it is characterised in that the part flow arrangement is according to below equation is calculated
The degree of superheat of the gas vent of gas-liquid separator:
SH1=Ts-Tc
Wherein, SH1 is the degree of superheat of the gas vent of the gas-liquid separator, and Ts is the gas outlet of the gas-liquid separator
The corresponding saturation temperature of pressure, Tc is the temperature of the gas outlet of the gas-liquid separator.
4. multiple on-line system as claimed in claim 1, it is characterised in that the predetermined threshold value is 2-4 degree.
5. multiple on-line system as claimed in claim 1, it is characterised in that multiple on-line system work cooling and warming at the same time
Pattern.
6. multiple on-line system as claimed in claim 5, it is characterised in that described while cooling and warming pattern includes that master heats mould
Formula.
7. the multiple on-line system as any one of claim 1-6, it is characterised in that start fortune in the multiple on-line system
After the first Preset Time of row, the part flow arrangement starts the degree of superheat of the gas vent for obtaining the gas-liquid separator.
8. multiple on-line system as claimed in claim 7, it is characterised in that first Preset Time is 10-20 minute.
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CN105841292B (en) * | 2016-03-23 | 2018-09-07 | 广东美的暖通设备有限公司 | Multi-line system and its fluid infusion control method |
CN105928064B (en) * | 2016-04-29 | 2018-11-20 | 广东美的暖通设备有限公司 | Multi-line system and its valve body control method for crossing cold loop |
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