CN104748429B - multiple on-line system - Google Patents
multiple on-line system Download PDFInfo
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- CN104748429B CN104748429B CN201510151383.7A CN201510151383A CN104748429B CN 104748429 B CN104748429 B CN 104748429B CN 201510151383 A CN201510151383 A CN 201510151383A CN 104748429 B CN104748429 B CN 104748429B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
- F24F3/06—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the arrangements for the supply of heat-exchange fluid for the subsequent treatment of primary air in the room units
- F24F3/065—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the arrangements for the supply of heat-exchange fluid for the subsequent treatment of primary air in the room units with a plurality of evaporators or condensers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
-
- 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
- F24F13/24—Means for preventing or suppressing noise
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/31—Expansion valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- 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
- F25B41/40—Fluid line arrangements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
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- 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
- F24F13/24—Means for preventing or suppressing noise
- F24F2013/247—Active noise-suppression
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2140/00—Control inputs relating to system states
- F24F2140/20—Heat-exchange fluid temperature
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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
- F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
- F25B2313/023—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple indoor units
- F25B2313/0231—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple indoor units with simultaneous cooling and heating
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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
- F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
- F25B2400/23—Separators
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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
- F25B2600/00—Control issues
- F25B2600/25—Control of valves
- F25B2600/2509—Economiser valves
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Atmospheric Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Signal Processing (AREA)
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
Abstract
The invention discloses a multiple on-line. The multiple on-line system comprises an outdoor unit device, a flow dividing device and multiple indoor unit devices, wherein the flow dividing device comprises a gas-liquid separator, a first heat exchanging component, a first electronic expansion valve, a second heat exchanging component and a second electronic expansion valve; the flow dividing device acquires a superheat temperature value at a high-pressure coolant outlet of the outdoor unit device and controls the first electronic expansion valve according to the superheat temperature value at the high-pressure coolant outlet of the outdoor unit device. The multiple on-line system can accurately detect the superheat temperature value at the high-pressure coolant outlet of the outdoor unit device and control the opening degree of the first electronic expansion valve according to the superheat temperature value at the high-pressure coolant outlet of the outdoor unit device, and therefore the purposes of ensuring the heating capacity of the heating indoor unit devices and reducing the system operation noise simultaneously are achieved.
Description
Technical field
The present invention relates to air-conditioning technical field, particularly to a kind of multiple on-line system.
Background technology
Continuous development with air-conditioning technical and the reinforcement of people's environmental consciousness, heat-reclamation multi-compressors system is increasingly subject to
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 is capable of the indoor set cooling and warming simultaneously of not chummery, by part flow arrangement
Distribution liquid state refrigerant is to the indoor set in different demands room.When off-premises station heats (pure heat or master heat), due to outdoor
Temperature is relatively low, and when the compressor air-discharging degree of superheat is not big, refrigerant can occur condensation thus to produce liquid cold in pipe arrangement inner surface
Matchmaker, if this operative liquid refrigerant is left intact, can flow to high-pressure gaseous refrigerant and heat indoor set and lead to its energy
Power is not enough or leaving air temp fluctuation.
In order to prevent liquid refrigerants from flowing to machine in heating chamber, when off-premises station heats, generally make the first electronics in part flow arrangement
Expansion valve maintains certain aperture to dredge this operative liquid refrigerant, but this results in some gaseous coolants, and to flow through the first electronics swollen
Swollen valve, if the gaseous coolant flowing through the first electric expansion valve excessively can bring also can reduce flow direction refrigeration while noise problem
The degree of supercooling of the cooling medium liquid of indoor set, before in turn resulting in refrigeration indoor set throttling, refrigerant enters gas-liquid two-phase, produces noise etc. and asks
Topic.
Content of the invention
The purpose of the present invention is intended at least solve one of above-mentioned technical problem.
For this reason, it is an object of the invention to proposing a kind of multiple on-line system, off-premises station device high pressure can be detected exactly
Super heat value at refrigerant exit is to control the first electronics swollen according to the super heat value in off-premises station device high pressure refrigerant exit
The aperture of swollen valve, thus reach the purpose reducing system operation noise while guaranteeing to heat indoor unit heating capacity.
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 unit, wherein, described 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, described part flow arrangement obtains the high pressure refrigerant outlet of described off-premises station device
The super heat value at place, and according to the super heat value in the high pressure refrigerant exit of described off-premises station device to described first electronic expansion
Valve is controlled.
Multiple on-line system according to embodiments of the present invention, overheated by the high pressure refrigerant exit of acquisition off-premises station device
Angle value the aperture of the first electric expansion valve in part flow arrangement is controlled, and the liquid producing in pipe arrangement can not only be avoided cold
Matchmaker flow to and heats indoor set and the heating capacity that leads to is not enough or the problem of leaving air temp fluctuation is additionally it is possible to avoid flowing through the first electricity
The gaseous coolant of sub- expansion valve excessively can bring the noise problem of the first electric expansion valve, and is operated in main heating in multi-connected machine
Additionally it is possible to prevent from excessively reducing the refrigerant of flow direction refrigeration indoor set because of the gaseous coolant flowing through the first electric expansion valve during pattern
The degree of supercooling of liquid, thus the noise problem that before avoiding refrigeration indoor set throttling, refrigerant enters gas-liquid two-phase and produces, therefore, this
The multiple on-line system of bright embodiment can reach reduction system operation noise while guaranteeing to heat indoor unit heating capacity
Purpose.
According to one embodiment of present invention, in the initial operation stage of described multiple on-line system, described part flow arrangement control
Make described first electric expansion valve to be closed.
Wherein, if the super heat value in the high pressure refrigerant exit of described off-premises station device is more than or equal to predetermined threshold value,
Described part flow arrangement controls described first electric expansion valve to remain off；If the high pressure refrigerant of described off-premises station device goes out
Super heat value at mouthful is less than described predetermined threshold value, and described part flow arrangement controls described first electric expansion valve to open default opening
Degree.
According to one embodiment of present invention, described predetermined threshold value is according to the high pressure refrigerant exit of described off-premises station device
Refrigerant temperature and environment temperature between difference determine.
According to one embodiment of present invention, by being arranged on the temperature in the high pressure refrigerant exit of described off-premises station device
Sensor is to detect the refrigerant temperature in the high pressure refrigerant exit of described off-premises station device.
In an embodiment of the present invention, described multiple on-line system is operated in pure heating mode or main heating mode.
The aspect that the present invention adds 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.
Brief description
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 the system schematic being run on according to the multiple on-line system of one embodiment of the invention during pure heating mode；
Fig. 3 is the system schematic being run on according to the multiple on-line system of one embodiment of the invention during main heating mode；
Fig. 4 is the system schematic being run on according to the multiple on-line system of one embodiment of the invention during pure refrigeration mode；
Fig. 5 is the schematic diagram being run on according to the multiple on-line system of one embodiment of the invention during main refrigeration mode；
Fig. 6 a is the setting curve figure of the off-premises station outlet high pressure refrigerant degree of superheat limit value according to one embodiment of the invention；
And
Fig. 6 b 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 described embodiment is shown in the drawings, wherein from start to finish
The element that same or similar label represents same or similar element or has 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.
The multiple on-line system of proposition according to embodiments of the present invention to be described with reference to the accompanying drawings.
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 exhaust outlet and gas returning port, and cross valve 102 has first to fourth valve
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 is by 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 is 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 is 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 passes through the second of high-pressure stop valve 40, check valve 108b and outdoor heat exchanger 103
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 connect to check valve 108b and outdoor heat exchanger 103 it
Between.
First heat-exchanging component 307a and the second heat-exchanging component 307b is 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 fills
Put 21 and include indoor heat exchanger 211 and restricting element 212, 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, and each indoor set fills
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.And, 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, and the first heat exchange stream of the second heat-exchanging component 307b is respectively
Connect with the first public channel and the second public channel, the first electric expansion valve 304a connects 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.
Wherein, if the pipe arrangement between the second interface 110 of off-premises station device 10 and the entrance of gas-liquid separator 301 relatively
Long, it is easy to condense in the inner surface of pipe arrangement from the high-temperature gas refrigerant of second interface 110 output of off-premises station device 10
And become operative liquid refrigerant, it is flowed in gas-liquid separator 301.
Therefore, in an embodiment of the present invention, part flow arrangement 30 is used for obtaining the high pressure refrigerant outlet of off-premises station device 10
The super heat value at place is the super heat value at second interface, and the super heat value in the high pressure refrigerant exit according to off-premises station device
First electric expansion valve 304a is controlled, liquid refrigerants in Gas and liquid flow diverter 301 not only can be effectively discharged out moreover it is possible to
Excessive gaseous coolant is avoided to flow through the first electric expansion valve 304a.
Wherein, in the initial operation stage of multiple on-line system, part flow arrangement 30 controls the first electric expansion valve 304a to be in
Closed mode.
And, if the super heat value in the high pressure refrigerant exit of off-premises station device is more than or equal to predetermined threshold value, shunting
Device 30 controls the first electric expansion valve 304a to remain off, it is to avoid excessive gaseous coolant flows through the first electric expansion valve
304a and the noise problem that produces reduce flow direction system it is also possible to prevent because the gaseous coolant that flows through the first electric expansion valve is excessive
The degree of supercooling of the cooling medium liquid of cold indoor set, thus the noise that before avoiding refrigeration indoor set throttling, refrigerant enters gas-liquid two-phase and produces
Problem；If the super heat value in the high pressure refrigerant exit of off-premises station device is less than described predetermined threshold value, part flow arrangement 30 controls
First electric expansion valve 304a opens default aperture, such that it is able to be effectively discharged out the liquid refrigerants in Gas and liquid flow diverter 301, prevents
Only liquid refrigerants enters with gaseous coolant and heats indoor unit it is ensured that system heating effect.
Wherein, according to one embodiment of present invention, above-mentioned predetermined threshold value can be according to the high pressure refrigerant of off-premises station device 10
Difference between the refrigerant temperature in exit and environment temperature determines, specifically as shown in Figure 6 a, predetermined threshold value is off-premises station outlet
The difference that high pressure refrigerant degree of superheat limit value and off-premises station export between high pressure refrigerant temperature and environment temperature exists certain linear
Relation.It is understood that the off-premises station outlet high pressure refrigerant degree of superheat limit value in Fig. 6 a is only an example, specifically can basis
Pipe arrangement actual insulation situation and piping length are determined by experiment.
If Fig. 1 is to as shown in figure 5, can be second interface by being disposed in the outdoor the high pressure refrigerant exit of machine device 10
The temperature sensor 111 of 110 positions is to detect the refrigerant temperature in the high pressure refrigerant exit of off-premises station device 10.
And, according to one embodiment of present invention, as shown in Figures 1 to 5, also in the first electric expansion valve in parallel
The two ends of 304a and the second magnetic valve 308 are respectively provided with pressure sensor 309a and pressure sensor 309b, and change second
The two ends of the first heat exchange stream of hot assembly 307b are also respectively provided with temperature sensor 310a and temperature sensor 310b.Additionally,
Also in one end setting pressure sensor 309c of the second heat exchange stream of the first heat-exchanging component 307a.
In an embodiment of the present invention, multiple on-line system is operated in pure heating mode or main heating mode.Wherein it is desired to say
Bright, the operational mode of multiple on-line system also includes pure refrigeration mode and main refrigeration 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 flows to and is: gases at high pressure are from the exhaust outlet of compressor 101 through oil eliminator 105 to four
Port valve 102, be then passed 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, become through the second electric expansion valve 304b
Become low-pressure gas-liquid two-phase, low-pressure gas-liquid two-phase is through the second heat exchange stream of the second heat-exchanging component 307b and the first heat-exchanging component
The second heat exchange stream of 307a returns to off-premises station device 10, and that is, low-pressure gas-liquid two-phase passes through 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 flows to and is: gases at high pressure from the exhaust outlet of compressor 101 through oil eliminator 105 to cross valve 102, be then passed 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 heating 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 305c to second heat-exchanging component 307b, becomes low-pressure gas-liquid two-phase through the second electric expansion valve 304b,
The second heat exchange stream through the second heat-exchanging component 307b for the low-pressure gas-liquid two-phase and the second heat exchange stream of the first heat-exchanging component 307a
Road returns to off-premises station device 10, and that is, low-pressure gas-liquid two-phase is returned to by low-pressure shutoff valve 50, first interface 109, check valve 108d
Become low-pressure gas, low-pressure gas passes through cross valve 102, outer machine gas-liquid separator 104 returns to compressor after outdoor heat exchanger 103
101 gas returning port.Refrigerant for freezing flows to and is: through the highly pressurised liquid of the first heat exchange stream of the second heat-exchanging component 307b
A part flow to restricting element 242 in indoor unit 24 also by the second check valve 306d, become low-pressure gas-liquid two-phase,
Become low-pressure gas after the indoor heat exchanger 241 in indoor unit 24 again, this 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, return to off-premises station device 10.
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 flows to and is: gases at high pressure are from the exhaust outlet of compressor 101 through oil eliminator 105 to four
Port valve 102, becomes highly pressurised liquid after being then passed through outdoor heat exchanger 103, 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 assembly 307a, to the first electric expansion valve 304a and the second magnetic valve 308, is then passed 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 correspond to respectively and 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 corresponds to and returns to off-premises station device 10 through four the first control valves 302a, 302b, 302c, 302d, and that is, low-pressure gas leads to
Cross low-pressure shutoff valve 50, first interface 109, check valve 108a, outer machine gas-liquid separator 104 return to the gas returning port of 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 flows to and is: gases at high pressure from the exhaust outlet of compressor 101 through oil eliminator 105 to cross valve 102, be then passed through outdoor and change
Become high-pressure gas-liquid two-phase, high-pressure gas-liquid two-phase is through check valve 108b, second interface 110, high-pressure stop valve 40 after hot device 103
Carry out gas-liquid separation to gas-liquid separator 301, wherein, highly pressurised liquid changes through first from the liquid outlet of gas-liquid separator 301
The first heat exchange stream of hot assembly 307a, to the first electric expansion valve 304a and the second magnetic valve 308, is then passed through the second heat exchange
The first heat exchange stream of assembly 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 becoming three road low-pressure gases after corresponding indoor heat exchanger, then
Correspondence returns to off-premises station device 10 through three the first control valves 302a, 302b, 302c, and that is, low-pressure gas passes through low-pressure shutoff valve
50th, first interface 109, check valve 108a, outer machine gas-liquid separator 104 return to the gas returning port of compressor 101.Cold for heat
Matchmaker flows to and is: carries out the gases at high pressure of gas-liquid separation from the gas vent of gas-liquid separator 301 through through gas-liquid separator 301
The indoor heat exchanger 241 in indoor unit 24 for two control valves 303d, becomes highly pressurised liquid, and highly pressurised liquid fills through indoor set
Pass through the first check valve 305d and the first heat exchange stream through the second heat-exchanging component 307b after putting the restricting element 242 in 24
Highly pressurised liquid converges.
In an embodiment of the present invention, each indoor unit is required to send the fortune of indoor unit to part flow arrangement 30
Line parameter, wherein, the operational factor of each indoor unit includes: the operational mode of indoor unit (such as refrigeration mode, heats
Pattern etc.), indoor unit as refrigeration in machine when the degree of superheat, indoor unit as refrigeration in machine when restricting element open
Degree, indoor unit are as the degree of supercooling heating during interior machine, indoor unit as restricting element aperture heating during interior machine etc..
According to one embodiment of present invention, as shown in Figure 6 b, can directly carry out between off-premises station device and part flow arrangement
Communication, each indoor unit is communicated with off-premises station device by part flow arrangement.Wherein, each indoor unit is assigned
One address, is easy to the communication between communication and each indoor unit and the part flow arrangement between each indoor unit,
Such as first indoor unit is assigned the first address, and the second indoor unit is assigned the second address ..., the 7th indoor set dress
Put and be assigned the 7th address.In addition, each indoor unit also includes line control machine, each indoor unit also with respective line traffic control
Device is communicated.
Further, a specific example according to the present invention, the off-premises station control unit in off-premises station device and shunting
Control module in device is communicated, simultaneously 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
(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 unit 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
Logic output instruction signal controls the part such as compressor and outdoor fan to run.
Therefore, in an embodiment of the present invention, only TEMP need to be set in the high pressure refrigerant exit of off-premises station device
Gathering the refrigerant temperature information in the high pressure refrigerant exit of off-premises station device, such part flow arrangement can be according to outer machine for device 111
The information realizations such as the refrigerant temperature in high pressure refrigerant exit of device, the pressure at expulsion of compressor, environment temperature are adjusted further
The aperture of the first electric expansion valve.
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, to 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 refrigerated medium simultaneously
Heat pattern, off-premises station device sends corresponding modes according to the system running pattern judging and instructs to part flow arrangement.Meanwhile, off-premises station
Device controls the part such as compressor and outdoor fan to run according to internal logic output instruction signal.Part flow arrangement is according to off-premises station
The mode instruction that device gives carries out the control of each state parameter.
Say, multiple on-line system enter pure heat or during main heating mode, in the initial operation stage of multiple on-line system,
Part flow arrangement controls the first electric expansion valve to be closed.Then gather the data of related sensor, and obtain compressor
Pressure at expulsion, environment temperature, the information such as the high pressure refrigerant outlet temperature of off-premises station device, judge room according to these parameter informations
The degree of superheat in the high pressure refrigerant exit of outer machine device.Wherein, when the super heat value of the outlet high pressure refrigerant of off-premises station device is high
When a threshold value is predetermined threshold value, part flow arrangement controls the first electric expansion valve to be closed；When off-premises station dress
When the super heat value of the outlet high pressure refrigerant put is predetermined threshold value less than a threshold value, part flow arrangement controls the first electronics swollen
Swollen valve is opened certain aperture and is preset aperture.
In sum, multiple on-line system according to embodiments of the present invention, is gone out by the high pressure refrigerant obtaining off-premises station device
Super heat value at mouthful the aperture of the first electric expansion valve in part flow arrangement is controlled, and can not only avoid in pipe arrangement
The heating capacity that the liquid refrigerants producing flow to machine in heating chamber and leads to is not enough or the problem of leaving air temp fluctuation is additionally it is possible to keep away
The gaseous coolant exempting to flow through the first electric expansion valve excessively can bring the noise problem of the first electric expansion valve, and in multi-connected machine
It is operated in during main heating mode additionally it is possible to prevent from excessively reducing flow direction refrigeration because of the gaseous coolant flowing through the first electric expansion valve
The degree of supercooling of the cooling medium liquid of indoor set, thus the noise that before avoiding refrigeration indoor set throttling, refrigerant enters gas-liquid two-phase and produces is asked
Topic, therefore, the multiple on-line system of the embodiment of the present invention can reach and reduce while guaranteeing to heat indoor unit heating capacity
The purpose of system operation noise.
In the description of this specification, reference term " embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or the spy describing with reference to this 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
Necessarily refer to identical embodiment or example.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
Understand and 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 limits.
Claims (4)
1. a kind of multiple on-line system it is characterised in that include off-premises station device, part flow arrangement, multiple indoor unit, wherein,
Described 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 entrance of described gas-liquid separator passes through high-pressure stop valve and exports phase with the high pressure refrigerant of described off-premises station device
Even, the liquid outlet of described gas-liquid separator is connected with the first heat exchange stream of the first heat-exchanging component, and the of the first heat-exchanging component
One heat exchange stream is connected with the first electric expansion valve, and described part flow arrangement obtains the high pressure refrigerant exit of described off-premises station device
Super heat value, and according to the super heat value in the high pressure refrigerant exit of described off-premises station device to described first electric expansion valve
It is controlled；
In the initial operation stage of described multiple on-line system, described part flow arrangement controls described first electric expansion valve to be in closing
State；
If the super heat value in the high pressure refrigerant exit of described off-premises station device is more than or equal to predetermined threshold value, described shunting dress
Put described first electric expansion valve of control to remain off；
If the super heat value in the high pressure refrigerant exit of described off-premises station device is less than described predetermined threshold value, described part flow arrangement
Described first electric expansion valve is controlled to open default aperture.
2. multiple on-line system as claimed in claim 1 is it is characterised in that described predetermined threshold value is according to described off-premises station device
Difference between the refrigerant temperature in high pressure refrigerant exit and environment temperature determines.
3. multiple on-line system as claimed in claim 2 is it is characterised in that cold by being arranged on the high pressure of described off-premises station device
The temperature sensor in matchmaker exit is to detect the refrigerant temperature in the high pressure refrigerant exit of described off-premises station device.
4. the multiple on-line system as any one of claim 1-3 it is characterised in that described multiple on-line system be operated in pure
Heating mode or main heating mode.
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| CN201510151383.7A CN104748429B (en) | 2015-03-31 | 2015-03-31 | multiple on-line system |
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| CN201510151383.7A CN104748429B (en) | 2015-03-31 | 2015-03-31 | multiple on-line system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110332648A (en) * | 2019-07-22 | 2019-10-15 | 宁波奥克斯电气股份有限公司 | A kind of control method of electric expansion valve, device and multi-gang air conditioner |
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| CN105115196B (en) * | 2015-07-06 | 2018-04-06 | 广东美的暖通设备有限公司 | The flow control methods of cooling circuit again and device of multiple on-line system |
| CN105115199B (en) * | 2015-07-06 | 2017-10-31 | 广东美的暖通设备有限公司 | The coolant distribution control method and device of multiple on-line system |
| CN105066539B (en) | 2015-07-16 | 2018-07-10 | 广东美的暖通设备有限公司 | Multi-line system and its control method for electronic expansion valve |
| CN105066349B (en) * | 2015-08-03 | 2017-10-27 | 珠海格力电器股份有限公司 | The interior machine patten transformation control method and heat-reclamation multi-compressors of heat-reclamation multi-compressors |
| CN105953468B (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 |
| CN105972860B (en) * | 2016-04-29 | 2019-01-18 | 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 |
| CN106403346A (en) * | 2016-11-16 | 2017-02-15 | 珠海格力电器股份有限公司 | Refrigerant distributor and two-pipe heating recycling multi-split system |
| CN107559953B (en) * | 2017-08-15 | 2020-02-04 | 广东美的暖通设备有限公司 | Multi-split air conditioning system and control method and device of supercooling loop valve body thereof |
| CN108061348A (en) * | 2017-12-29 | 2018-05-22 | 广东申菱环境系统股份有限公司 | A kind of urban track traffic integrated refrigeration station formula evaporative condenser air-conditioning system |
| CN112344446A (en) * | 2020-10-28 | 2021-02-09 | 珠海格力电器股份有限公司 | Outdoor unit device of multi-split air conditioning system, defrosting control method and multi-split air conditioning system |
| CN112902429B (en) * | 2020-12-28 | 2022-06-03 | 宁波奥克斯电气股份有限公司 | Noise reduction control method and device for air conditioner and air conditioner |
| CN113739275B (en) * | 2021-08-03 | 2022-12-13 | 青岛海信日立空调系统有限公司 | Air conditioning system |
| CN115585537B (en) * | 2022-12-12 | 2023-03-28 | 宁波奥克斯电气股份有限公司 | Defrosting control method and device of multi-split system and multi-split system |
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| CN1104605C (en) * | 2000-06-02 | 2003-04-02 | 海尔集团公司 | Improved refrigerating system for one driving multiple-unit air conditioner |
| US7073344B2 (en) * | 2003-07-10 | 2006-07-11 | Standex International Corporation | Electrically controlled defrost and expansion valve apparatus |
| CN101666559B (en) * | 2006-03-27 | 2012-04-04 | 三菱电机株式会社 | Refrigerating and air-conditioning plant |
| JP2009180429A (en) * | 2008-01-30 | 2009-08-13 | Daikin Ind Ltd | Refrigerating device |
| CN203533802U (en) * | 2013-09-22 | 2014-04-09 | 广东美的暖通设备有限公司 | Air-conditioning system |
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| CN110332648A (en) * | 2019-07-22 | 2019-10-15 | 宁波奥克斯电气股份有限公司 | A kind of control method of electric expansion valve, device and multi-gang air conditioner |
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