CN104748428A - Multi-split system - Google Patents
Multi-split system Download PDFInfo
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- CN104748428A CN104748428A CN201510151305.7A CN201510151305A CN104748428A CN 104748428 A CN104748428 A CN 104748428A CN 201510151305 A CN201510151305 A CN 201510151305A CN 104748428 A CN104748428 A CN 104748428A
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- expansion valve
- electric expansion
- valve
- value
- line system
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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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- 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
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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)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses a multi-split system. The multi-split system comprises an outdoor unit device, a shunting device and multiple indoor unit devices; the shunting device comprises a gas-liquid separator, a first heat exchange assembly, a first electronic expansion valve, a second heat exchange assembly, a second electronic expansion valve and a response solenoid valve connected with the second electronic expansion valve in parallel; after the shunting device controls the first electronic expansion valve to operate at the preset minimum opening degree for first preset time, the first electronic expansion valve, the second electronic expansion valve and the response solenoid valve are sequentially controlled to act according to a preset sequence, the pressure value and the temperature value of a refrigerant entering the first electronic expansion valve are recorded, and the shunting device calculates the supercooling degree value according to the pressure value and the temperature value of the refrigerant entering the first electronic expansion valve and adjusts the minimum opening degree of the first electronic expansion valve according to the supercooling degree value. The multi-split system can automatically learn different minimum opening degrees of the first electronic expansion valve to enlarge the adjusting range and improving the accuracy of the first electronic expansion valve, and reliable and stable performance of the multi-split system is ensured.
Description
Technical field
The present invention relates to air-conditioning technical field, particularly a kind of multiple on-line system.
Background technology
Along with the development of air-conditioning technical and the reinforcement of people's environmental consciousness, heat-reclamation multi-compressors systems grow is subject to the welcome in market.And two-pipe heat-reclamation multi-compressors system is the one in the market in main flow heat-reclamation multi-compressors system, wherein, two-pipe heat-reclamation multi-compressors system can realize cooling and warming simultaneously, can reach good effect, needing to carry out middle pressure-controlled to part flow arrangement to make to heat machine in refrigeration.
In correlation technique, strategy part flow arrangement being carried out to middle pressure-controlled is controlled according in certain value or certain limit the front and back pressure differential of the first electric expansion valve in part flow arrangement., there is a non-adjustable region from zero aperture to maximum opening, the minimum valve opening pulse namely provided from zero to electric expansion valve manufacturer in the first electric expansion valve used in correlation technique.And multiple on-line system is due to range of operation broadness, volume change is large, and the ratio that the first electric expansion valve runs in minimum aperture is also higher, therefore needs accurately to control the aperture of the first electric expansion valve.
Summary of the invention
The application makes the understanding of following problem and discovery based on inventor:
Due to the complexity of multiple on-line system running status, in order to the stability and performance that make system are best, need the front and back pressure difference value of the first electric expansion valve made in part flow arrangement fine adjustment in a certain scope, and 2000P, 3000P etc. that current electric expansion valve mainly contains 480P (pulse) and wide adjusting range are several.Obviously for pressure-controlled in above-mentioned heat-reclamation multi-compressors system, the most effective the easiest way is exactly adopt wide adjusting range and control meticulous electric expansion valve, but the shortcoming done like this causes system cost too high.
480P electric expansion valve is cheap but adjustment step-length is longer, and due to the difference of manufacturing process, the pulse of each valve body minimum valve opening is indefinite within the scope of (32 ± 20) P, minimum aperture deviation is large, this just causes the system using 480P electric expansion valve, in order to modification stability, generally fixedly getting minimal adjustment aperture is 56P.
Object of the present invention is intended at least solve one of above-mentioned technical problem.
For this reason, the object of the invention is to propose a kind of multiple on-line system, can the minimum aperture of different the first electric expansion valve of automatic learning, increase its adjustable range and precision, ensure the dependable performance of multiple on-line system, stable.
For achieving the above object, comprise off-premises station device, part flow arrangement, multiple indoor unit, wherein, described part flow arrangement comprises gas-liquid separator, first heat-exchanging component, first electric expansion valve, second heat-exchanging component, second electric expansion valve, the response magnetic valve be connected in parallel with described second electric expansion valve, after described first electric expansion valve of described part flow arrangement control runs the first Preset Time with the minimum aperture preset, described first electric expansion valve is controlled successively with preset order, described second electric expansion valve and the action of described response magnetic valve, and record enters force value and the temperature value of the refrigerant of described first electric expansion valve, described part flow arrangement is according to the force value of refrigerant and the calculated cold angle value of temperature value that enter described first electric expansion valve, and adjust according to the minimum aperture of described degree of supercooling value to described first electric expansion valve.
According to the multiple on-line system of the embodiment of the present invention, first part flow arrangement control the first electric expansion valve with preset minimum aperture run the first Preset Time after, the first electric expansion valve is controlled successively again with preset order, second electric expansion valve and the action of response magnetic valve, and record enters force value and the temperature value of the refrigerant of the first electric expansion valve, then part flow arrangement is according to the force value of refrigerant and the calculated cold angle value of temperature value that enter the first electric expansion valve, and adjust according to the minimum aperture of this degree of supercooling value calculated to the first electric expansion valve, realize the minimum aperture Self-learning control of the first electric expansion valve, therefore, can the minimum aperture of different the first electric expansion valve of self study, thus increase its adjustable range and precision, guarantee the degree of accuracy to the first electronic expansion valve controls, ensure the dependable performance of multiple on-line system, stable.
According to one embodiment of present invention, described part flow arrangement controls described first electric expansion valve, described second electric expansion valve and the action of described response magnetic valve successively with preset order, be specially: described first electric expansion valve is opened into the minimum aperture of target after closing described first electric expansion valve by described part flow arrangement, and described part flow arrangement closes described second electric expansion valve and described response magnetic valve.
Wherein, if described degree of supercooling value is more than or equal to predetermined threshold value, as the minimum aperture of described target after the current minimum aperture of described first electric expansion valve being increased the first default aperture; If described degree of supercooling value is less than described predetermined threshold value, then keep the current minimum aperture of described first electric expansion valve constant.
Further, when reaching the second Preset Time the running time of the compressor in described off-premises station device, as the minimum aperture of described target after the current minimum aperture of described first electric expansion valve being deducted the second default aperture.
Particularly, described first Preset Time is 20-40 minute, and described second Preset Time is 3-5 hour, and described predetermined threshold value is 2-4 degree, and the described first default aperture is 1-3P, and the described second default aperture is 3-5P.
According to one embodiment of present invention, described part flow arrangement enters saturation temperature corresponding to the force value of the refrigerant of described first electric expansion valve by obtaining, to calculate described degree of supercooling value according to the temperature value of described saturation temperature and the refrigerant that enters described first electric expansion valve.
According to one embodiment of present invention, described default minimum aperture is 50-60P.
In an embodiment of the present invention, described multiple on-line system is operated in main refrigeration mode.
The aspect that the present invention adds and advantage will part provide in the following description, and part will become obvious from the following description, or be recognized by practice of the present invention.
Accompanying drawing explanation
The present invention above-mentioned and/or additional aspect and advantage will become obvious and easy understand from the following description of the accompanying drawings of embodiments, wherein:
Fig. 1 is the system schematic of multiple on-line system according to an embodiment of the invention;
Fig. 2 is system schematic when multiple on-line system runs on pure heating mode according to an embodiment of the invention;
Fig. 3 is system schematic when multiple on-line system runs on main heating mode according to an embodiment of the invention;
Fig. 4 is system schematic when multiple on-line system runs on pure refrigeration mode according to an embodiment of the invention;
Fig. 5 is schematic diagram when multiple on-line system runs on main refrigeration mode according to an embodiment of the invention; And
Fig. 6 is the communication network figure of multiple on-line system according to an embodiment of the invention.
Detailed description of the invention
Be described below in detail embodiments of the invention, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Being exemplary below by the embodiment be described with reference to the drawings, only for explaining the present invention, and can not limitation of the present invention being interpreted as.
The multiple on-line system proposed according to the embodiment of the present invention is 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 comprises: off-premises station device 10, and multiple indoor unit is four indoor units 21,22,23,24 such as, and part flow arrangement 30.
Wherein, off-premises station device 10 comprises compressor 101, cross valve 102, outdoor heat exchanger 103, outer machine gas-liquid separator 104, oil eliminator 105, first magnetic valve 106, capillary 107, four check valves 108A, 108B, 108C, 108D, and first interface 109 and the second interface 110.Compressor 101 has exhaust outlet and gas returning port, cross valve 102 has first to fourth valve port, first valve port is communicated with one of them in the 3rd valve port with the second valve port, 4th valve port and the second valve port are communicated with another in the 3rd valve port, first valve port is connected with the exhaust outlet of compressor 101 by oil eliminator 105,4th valve port is connected with the gas returning port of compressor 101 by outer machine gas-liquid separator 104, be in series with check valve 108A between second valve port and first interface 109, the 3rd valve port is connected with the first end of outdoor heat exchanger 103.
Part flow arrangement 30 comprises gas-liquid separator 301, multiple first control valve is four first control valves 302A, 302B, 302C, 302D such as, multiple second control valve is four second control valves 303A, 303B, 303C, 303D such as, first electric expansion valve 304A, second electric expansion valve 304B, the response magnetic valve 311 be connected in parallel with the second electric expansion valve 304B, four first check valves 305A, 305B, 305C, 305D, four 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 is connected with the second end of outdoor heat exchanger 103 by high-pressure stop valve 40, check valve 108B, and gas vent is connected with four second control valves 303A, 303B, 303C, 303D respectively; Four first control valves 302A, 302B, 302C, 302D are connected with first interface 109 respectively by low-pressure shutoff valve 50.First heat-exchanging component 307A and the second heat-exchanging component 307B can be plate type heat exchanger, also can be double-tube heat exchanger.
As shown in Figures 1 to 5, the first end of check valve 108A is connected between check valve 108B and the second interface 110 by check valve 108C, and second end of check valve 108A is connected between check valve 108B and outdoor heat exchanger 103 by check valve 108D.
First heat-exchanging component 307A and the second heat-exchanging component 307B has the first heat exchange stream and the second heat exchange stream respectively, 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 exchange stream of the first heat-exchanging component 307A is connected with the first electric expansion valve 304A, and the second heat exchange stream of the first heat-exchanging component 307A is connected with four first control valves 302A, 302B, 302C, 302D with the second heat exchange stream of the second heat-exchanging component 307B respectively.
As shown in Figures 1 to 5, each indoor unit includes indoor heat exchanger and restricting element, wherein, indoor unit 21 comprises indoor heat exchanger 211 and restricting element 212, indoor unit 22 comprises indoor heat exchanger 221 and restricting element 222, indoor unit 23 comprises indoor heat exchanger 231 and restricting element 232, and indoor unit 24 comprises indoor heat exchanger 241 and restricting element 242.The first end of the indoor heat exchanger in each indoor unit is connected with corresponding restricting element, second end of the indoor heat exchanger in each indoor unit is connected with the second control valve with the first corresponding control valve, restricting element in each indoor unit is connected with the second check valve with the first corresponding check valve, and the flow direction of the first check valve and the second check valve is contrary.And, four first check valves 305A, 305B, 305C, 305D are all connected to the first public stream, four second check valves 306A, 306B, 306C, 306D are all connected to the second public stream, first heat exchange stream public stream and the second public fluid communication with first respectively of the second heat-exchanging component 307B, first electric expansion valve 304A is connected to the first public stream, second electric expansion valve 304B is connected with the second public stream with the second heat exchange stream of the second heat-exchanging component 307B respectively, and the first electric expansion valve 304A is also parallel with the second magnetic valve 308.
In an embodiment of the present invention, part flow arrangement 30 control the first electric expansion valve 304A with preset minimum aperture run the first Preset Time after, the first electric expansion valve 304A is controlled successively with preset order, second electric expansion valve 304B and the action of response magnetic valve 311, and record enters force value and the temperature value of the refrigerant of the first electric expansion valve 304A, then part flow arrangement is according to the force value of refrigerant and the calculated cold angle value of temperature value that enter the first electric expansion valve 304A, and adjust according to the minimum aperture of this degree of supercooling value calculated to the first electric expansion valve, realize the minimum aperture self study process of the first electric expansion valve.
Wherein, part flow arrangement 30 controls described first electric expansion valve, described second electric expansion valve and the action of described response magnetic valve successively with preset order, be specially: described first electric expansion valve is opened into the minimum aperture of target after closing described first electric expansion valve by part flow arrangement 30, and described part flow arrangement closes described second electric expansion valve and described response magnetic valve.
According to one embodiment of present invention, part flow arrangement 30 by obtaining saturation temperature corresponding to the force value that enters the refrigerant of described first electric expansion valve, to calculate above-mentioned degree of supercooling value according to the temperature value of this saturation temperature and the refrigerant that enters the first electric expansion valve.
Further, if described degree of supercooling value is more than or equal to predetermined threshold value, as the minimum aperture of described target after the current minimum aperture of described first electric expansion valve being increased the first default aperture; If described degree of supercooling value is less than described predetermined threshold value, then keep the current minimum aperture of described first electric expansion valve constant.
In addition, when reaching the second Preset Time the running time of the compressor in described off-premises station device, as the minimum aperture of described target after the current minimum aperture of described first electric expansion valve being deducted the second default aperture.
Particularly, the first Preset Time can be 20-40 minute, and the second Preset Time can be 3-5 hour, and predetermined threshold value can be 2-4 degree, and the first default aperture can be 1-3P, and the second default aperture can be 3-5P, and default minimum aperture can be 50-60P.
According to one embodiment of present invention, as shown in Figures 1 to 5, also pressure sensor 309A and pressure sensor 309B is set respectively at the first electric expansion valve 304A of parallel connection and the two ends of the second magnetic valve 308, and also distinguishes set temperature sensor 310A and temperature sensor 310B at the two ends of the first heat exchange stream of the second heat-exchanging component 307B.In addition, also pressure sensor 309C is set in one end of the second heat exchange stream of the first heat-exchanging component 307A.
In an embodiment of the present invention, Self-learning control is carried out to the minimum aperture of the first electric expansion valve when multiple on-line system is operated in main refrigeration mode.Wherein, it should be noted that, the operational mode of multiple on-line system also comprises pure refrigeration mode and pure heating mode, main heating mode.
The refrigerant just described respectively when multiple on-line system is operated in pure heating mode, main heating mode, pure refrigeration mode and main refrigeration mode with reference to Fig. 2 to Fig. 5 below flows to.
As shown in Figure 2, when off-premises station device 10 judges that multiple on-line system is operated in pure heating mode, now four indoor units carry out heating work.Wherein, refrigerant flows to and is: 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 to gas-liquid separator 301, gases at high pressure from the gas vent of gas-liquid separator 301 respectively through four the second control valve 303A, 303B, 303C, 303D, to four corresponding indoor heat exchangers, becomes highly pressurised liquid, and then four road highly pressurised liquids are through corresponding restricting element and four the first check valve 305A, 305B, 305C, the first heat exchange stream of 305D to the second heat-exchanging component 307B, low-pressure gas-liquid two-phase is become through the second electric expansion valve 304B, low-pressure gas-liquid two-phase gets back to off-premises station device 10 through the second heat exchange stream of the second heat-exchanging component 307B and the second heat exchange stream of the first heat-exchanging component 307A, and namely low-pressure gas-liquid two-phase is by low-pressure shutoff valve 50, first interface 109, check valve 108D becomes low-pressure gas after getting back to outdoor heat exchanger 103, and low-pressure gas is by cross valve 102, the gas returning port of compressor 101 got back to by outer machine gas-liquid separator 104.
As shown in Figure 3, when off-premises station device 10 judges that multiple on-line system is operated in main heating mode, now have three indoor units to carry out heating work in four indoor units, an indoor unit carries out refrigeration work.Wherein, flow to for the refrigerant that heats and be: 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 is to gas-liquid separator 301, gases at high pressure from the gas vent of gas-liquid separator 301 respectively through three the second control valve 303A, 303B, 303C is to three indoor heat exchangers heated in indoor unit of correspondence, become highly pressurised liquid, then three road highly pressurised liquids are through corresponding restricting element and three the first check valve 305A, 305B, the first heat exchange stream of 305C to the second heat-exchanging component 307B, low-pressure gas-liquid two-phase is become through the second electric expansion valve 304B, low-pressure gas-liquid two-phase gets back to off-premises station device 10 through the second heat exchange stream of the second heat-exchanging component 307B and the second heat exchange stream of the first heat-exchanging component 307A, namely low-pressure gas-liquid two-phase is by low-pressure shutoff valve 50, first interface 109, check valve 108D becomes low-pressure gas after getting back to outdoor heat exchanger 103, low-pressure gas is by cross valve 102, the gas returning port of compressor 101 got back to by outer machine gas-liquid separator 104.Flow to for the refrigerant that freezes and be: also flowed to the restricting element 242 in indoor unit 24 through the part of the highly pressurised liquid of the first heat exchange stream of the second heat-exchanging component 307B by the second check valve 306D, become low-pressure gas-liquid two-phase, low-pressure gas is become again after the indoor heat exchanger 241 in indoor unit 24, this low-pressure gas with after the low-pressure gas-liquid two-phase mixtures of the second heat exchange stream of the second heat-exchanging component 307B and the second heat exchange stream of the first heat-exchanging component 307A, gets back to off-premises station device 10 after the first control valve 302D.
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 units carry out refrigeration work.Wherein, refrigerant flows to and is: gases at high pressure from the exhaust outlet of compressor 101 through oil eliminator 105 to cross valve 102, then after outdoor heat exchanger 103, become highly pressurised liquid, highly pressurised liquid is through check valve 108B, second interface 110, high-pressure stop valve 40 is to gas-liquid separator 301, highly pressurised liquid from the liquid outlet of gas-liquid separator 301 through the first heat exchange stream of the first heat-exchanging component 307A to the first electric expansion valve 304A and the second magnetic valve 308, then divide through the first heat exchange stream of the second heat-exchanging component 307B and be clipped to four the second check valve 306A, 306B, 306C, 306D, through four the second check valve 306A, 306B, 306C, the four road highly pressurised liquids of 306D are corresponding respectively becomes four road low-pressure gas-liquid two-phases after the restricting element in four indoor units, four road low-pressure gas-liquid two-phases are respectively through becoming four road low-pressure gases after the indoor heat exchanger of correspondence, then corresponding to four the first control valve 302A, 302B, 302C, 302D gets back to off-premises station device 10, and namely low-pressure gas is by low-pressure shutoff valve 50, first interface 109, check valve 108A, the gas returning port of compressor 101 got back to by outer machine gas-liquid separator 104.
As shown in Figure 5, when off-premises station device 10 judges that multiple on-line system is operated in main refrigeration mode, now have three indoor units to carry out refrigeration work in four indoor units, an indoor unit carries out heating work.Wherein, flow to for the refrigerant that freezes and be: gases at high pressure from the exhaust outlet of compressor 101 through oil eliminator 105 to cross valve 102, then after outdoor heat exchanger 103, high-pressure gas-liquid two-phase is become, high-pressure gas-liquid two-phase is through check valve 108B, second interface 110, high-pressure stop valve 40 carries out gas-liquid separation to gas-liquid separator 301, wherein, highly pressurised liquid from the liquid outlet of gas-liquid separator 301 through the first heat exchange stream of the first heat-exchanging component 307A to the first electric expansion valve 304A and the second magnetic valve 308, then divide through the first heat exchange stream of the second heat-exchanging component 307B and be clipped to three the second check valve 306A, 306B, 306C, through three the second check valve 306A, 306B, the three road highly pressurised liquids of 306C are corresponding respectively becomes three road low-pressure gas-liquid two-phases after the restricting element in three indoor units, three road low-pressure gas-liquid two-phases are respectively through becoming three road low-pressure gases after the indoor heat exchanger of correspondence, then corresponding to three the first control valve 302A, 302B, 302C gets back to off-premises station device 10, namely low-pressure gas is by low-pressure shutoff valve 50, first interface 109, check valve 108A, the gas returning port of compressor 101 got back to by outer machine gas-liquid separator 104.Flow to for the refrigerant that heats and be: the gases at high pressure carrying out gas-liquid separation through gas-liquid separator 301 from the gas vent of gas-liquid separator 301 through the second control valve 303D to the indoor heat exchanger 241 indoor unit 24, become highly pressurised liquid, highly pressurised liquid is converged by the first check valve 305D and the highly pressurised liquid through the first heat exchange stream of the second heat-exchanging component 307B after the restricting element 242 in indoor unit 24.
In an embodiment of the present invention, in order to realize the pressure reduction automatically controlled before and after the first electric expansion valve 304A, each indoor unit all needs the operational factor sending indoor unit to part flow arrangement 30, wherein, the operational factor of each indoor unit comprises: the operational mode of indoor unit is (as refrigeration mode, heating mode etc.), indoor unit is as the degree of superheat in refrigeration during machine, indoor unit is as the restricting element aperture in refrigeration during machine, indoor unit is as degree of supercooling when heating interior machine, indoor unit is as the restricting element aperture etc. when heating interior machine.
According to one embodiment of present invention, as shown in Figure 6, directly can carry out communication between off-premises station device and part flow arrangement, each indoor unit carries out communication by part flow arrangement and off-premises station device.Wherein, each indoor unit is assigned an address, be convenient to the communication between each indoor unit and the communication between each indoor unit and part flow arrangement, such as the first indoor unit is assigned the first address, second indoor unit is assigned the second address,, the 7th indoor unit is assigned the 7th address.In addition, each indoor unit also comprises line control machine, and each indoor unit also carries out communication with respective line control machine.
Further, according to a concrete example of the present invention, off-premises station control unit in off-premises station device and the control module in part flow arrangement carry out communication, and the control module simultaneously in part flow arrangement and the indoor set control unit in each indoor unit carry out communication.Wherein, the operational mode etc. of each indoor unit that the temperature information (residing for off-premises station device environment temperature, delivery temperature, suction temperature, heat exchange temperature etc.) of the off-premises station control unit Real-time Obtaining off-premises station device in off-premises station device, pressure information (as pressure at expulsion, back pressure etc.) and multiple indoor unit send judges the operational mode (such as pure heating mode, main heating mode, pure refrigeration mode and main refrigeration mode) of multiple on-line system, and the instruction of the operational mode of multiple on-line system is sent to part flow arrangement.Meanwhile, the off-premises station control unit in off-premises station device also controls the parts such as compressor and outdoor fan according to internal logic output instruction signal and runs.
In an embodiment of the present invention, during the first electric expansion valve adopts, pressure-controlled is for control system fluid level, i.e. the off-premises station device mass dryness fraction of gas-liquid two-phase of coming, and to realize multiple on-line system, cooling or heating effect is best simultaneously.In order to optimization system cost, the first electric expansion valve in the embodiment of the present invention can adopt 480P electric expansion valve.Be in main refrigeration mode in multiple on-line system, automatically can judge to learn the minimum aperture of valve body of this first electric expansion valve by the force value and these two parameters of temperature value entering the refrigerant of described first electric expansion valve.
Particularly, after multiple on-line system starts, off-premises station control unit in off-premises station device obtains the operational mode of the ambient temperature information of off-premises station device, pressure information and each indoor unit, judge the operational mode of multiple on-line system, such as, when each indoor unit all runs on refrigeration mode, multiple on-line system operational mode is pure refrigeration mode; When each indoor unit all runs on heating mode, multiple on-line system operational mode is pure heating mode; When in multiple indoor unit, the existing refrigeration mode that runs on is when also running on heating mode, and multiple on-line system operational mode is cooling and warming pattern simultaneously, and off-premises station device sends corresponding modes instruction to part flow arrangement according to the system running pattern judged.Meanwhile, off-premises station device controls the operation of the parts such as compressor and outdoor fan according to internal logic output instruction signal.Part flow arrangement carries out the control of each state parameter according to the mode instruction that off-premises station device is given.
Further, when multiple on-line system is run for the first time with main refrigeration mode, the given initial value of minimum aperture of the first electric expansion valve and Pmin.0 (such as 56P), and control by this minimum aperture Pmin.0 preset.Multiple on-line system is run in this mode, and the first electric expansion valve is in default minimum aperture and stable operation first Preset Time after such as 30 minutes, enters the minimum aperture self study process of the first electric expansion valve:
First, part flow arrangement controls the first electric expansion valve, the second electric expansion valve and the action of response magnetic valve successively with preset order, be specially: the first electric expansion valve is opened into the minimum aperture of target and Pmin. target after closing the first electric expansion valve by part flow arrangement, and close the second electric expansion valve and response magnetic valve.
Then, after 5 minutes, record enters force value and the temperature value of the refrigerant of the first electric expansion valve, and part flow arrangement is according to the force value of refrigerant and the calculated cold angle value of temperature value that enter the first electric expansion valve.
According to one embodiment of present invention, if the degree of supercooling value calculated above-mentioned is more than or equal to predetermined threshold value such as 3 degree, then the current minimum aperture of the first electric expansion valve is invalid, as the minimum aperture of target after current minimum aperture being increased the first default aperture such as 2P, i.e. Pmin. target=(Pmin. current+2) P; If the degree of supercooling value calculated is less than predetermined threshold value such as 3 degree, then the current minimum aperture of the first electric expansion valve is effective, and keep the current minimum aperture of the first electric expansion valve constant, namely Pmin=Pmin. is current.
Then, the also running time of recording compressed machine, and it is constantly little to reach the second Preset Time such as 4 in the running time of compressor, as the minimum aperture of target after the current minimum aperture of the first electric expansion valve being deducted the second default aperture, i.e. Pmin. target=(Pmin. current-4) P.
Therefore, in an embodiment of the present invention, according to the minimum aperture of running state parameter automatic learning first electric expansion valve of multiple on-line system, thus the accuracy to the first electronic expansion valve controls can be increased, to ensure that the effect of machine in cooling and warming all reaches best.
According to the multiple on-line system of the embodiment of the present invention, first part flow arrangement control the first electric expansion valve with preset minimum aperture run the first Preset Time after, the first electric expansion valve is controlled successively again with preset order, second electric expansion valve and the action of response magnetic valve, and record enters force value and the temperature value of the refrigerant of the first electric expansion valve, then part flow arrangement is according to the force value of refrigerant and the calculated cold angle value of temperature value that enter the first electric expansion valve, and adjust according to the minimum aperture of this degree of supercooling value calculated to the first electric expansion valve, realize the minimum aperture Self-learning control of the first electric expansion valve, therefore, can the minimum aperture of different the first electric expansion valve of self study, thus increase its adjustable range and precision, guarantee the degree of accuracy to the first electronic expansion valve controls, ensure the dependable performance of multiple on-line system, stable.
In the description of this description, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiments ", " example ", " concrete example " or " some examples " etc. means to describe in conjunction with this embodiment or example are contained at least one embodiment of the present invention or example.In this manual, identical embodiment or example are not necessarily referred to the schematic representation of above-mentioned term.And the specific features of description, structure, material or feature can combine in an appropriate manner in any one or more embodiment or example.
Although illustrate and describe embodiments of the invention, for the ordinary skill in the art, be appreciated that and can carry out multiple change, amendment, replacement and modification to these embodiments without departing from the principles and spirit of the present invention, scope of the present invention is by claims and equivalency thereof.
Claims (8)
1. a multiple on-line system, is characterized in that, comprises off-premises station device, part flow arrangement, multiple indoor unit, wherein,
Described part flow arrangement comprises gas-liquid separator, first heat-exchanging component, first electric expansion valve, second heat-exchanging component, second electric expansion valve, the response magnetic valve be connected in parallel with described second electric expansion valve, after described first electric expansion valve of described part flow arrangement control runs the first Preset Time with the minimum aperture preset, described first electric expansion valve is controlled successively with preset order, described second electric expansion valve and the action of described response magnetic valve, and record enters force value and the temperature value of the refrigerant of described first electric expansion valve, described part flow arrangement is according to the force value of refrigerant and the calculated cold angle value of temperature value that enter described first electric expansion valve, and adjust according to the minimum aperture of described degree of supercooling value to described first electric expansion valve.
2. multiple on-line system as claimed in claim 1, it is characterized in that, described part flow arrangement controls described first electric expansion valve, described second electric expansion valve and the action of described response magnetic valve successively with preset order, is specially:
Described first electric expansion valve is opened into the minimum aperture of target after closing described first electric expansion valve by described part flow arrangement, and described part flow arrangement closes described second electric expansion valve and described response magnetic valve.
3. multiple on-line system as claimed in claim 1, it is characterized in that, described part flow arrangement enters saturation temperature corresponding to the force value of the refrigerant of described first electric expansion valve by obtaining, to calculate described degree of supercooling value according to the temperature value of described saturation temperature and the refrigerant that enters described first electric expansion valve.
4. multiple on-line system as claimed in claim 2, is characterized in that,
If described degree of supercooling value is more than or equal to predetermined threshold value, as the minimum aperture of described target after the current minimum aperture of described first electric expansion valve being increased the first default aperture;
If described degree of supercooling value is less than described predetermined threshold value, then keep the current minimum aperture of described first electric expansion valve constant.
5. multiple on-line system as claimed in claim 4, it is characterized in that, when reaching the second Preset Time the running time of the compressor in described off-premises station device, as the minimum aperture of described target after the current minimum aperture of described first electric expansion valve being deducted the second default aperture.
6. multiple on-line system as claimed in claim 5, it is characterized in that, described first Preset Time is 20-40 minute, described second Preset Time is 3-5 hour, described predetermined threshold value is 2-4 degree, and the described first default aperture is 1-3P, and the described second default aperture is 3-5P.
7. multiple on-line system as claimed in claim 1, it is characterized in that, described default minimum aperture is 50-60P.
8. the multiple on-line system according to any one of claim 1-7, is characterized in that, described multiple on-line system is operated in main refrigeration mode.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105864984A (en) * | 2016-04-27 | 2016-08-17 | 广东美的暖通设备有限公司 | Adjusting method and device for indoor unit electronic expansion valve |
| WO2017005036A1 (en) * | 2015-07-06 | 2017-01-12 | 广东美的暖通设备有限公司 | Multi-line apparatus system refrigerant flow control method and device |
| CN107975920A (en) * | 2017-11-27 | 2018-05-01 | 宁波奥克斯电气股份有限公司 | Expansion valve control method and multi-line system |
| CN108826611A (en) * | 2018-03-19 | 2018-11-16 | 珠海格力电器股份有限公司 | Throttle valve method of adjustment, device, air-conditioning system, storage medium and electronic device |
| CN109059369A (en) * | 2018-08-13 | 2018-12-21 | 宁波奥克斯电气股份有限公司 | A kind of control method of air-conditioning and multi-online air-conditioning system and air conditioner |
| CN113294884A (en) * | 2021-06-21 | 2021-08-24 | 宁波奥克斯电气股份有限公司 | Heating control method and device and air conditioner |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08291951A (en) * | 1991-01-10 | 1996-11-05 | Mitsubishi Electric Corp | Air conditioner |
| JPH08291952A (en) * | 1991-01-10 | 1996-11-05 | Mitsubishi Electric Corp | Air conditioner |
| CN1483974A (en) * | 2002-06-12 | 2004-03-24 | Lg������ʽ���� | Multe-unit air conditioner and control method |
| CN1517612A (en) * | 2003-01-16 | 2004-08-04 | Lg������ʽ���� | Duplex air governor with multiple cut-off distributors |
| CN1576730A (en) * | 2003-06-27 | 2005-02-09 | 三星电子株式会社 | Multi-unit type air conditioning equipment and control method thereof |
| JP2006343052A (en) * | 2005-06-10 | 2006-12-21 | Hitachi Ltd | Simultaneous cooling and heating multi-air conditioner |
| CN102635927A (en) * | 2012-04-26 | 2012-08-15 | 青岛海尔空调电子有限公司 | Pressure adjusting device and method for air conditioning systems |
| CN103175344A (en) * | 2013-03-13 | 2013-06-26 | 青岛海信日立空调系统有限公司 | Cold-region used multi-connected heat pump system and control method thereof |
| CN103353147A (en) * | 2013-06-28 | 2013-10-16 | 青岛海信日立空调系统有限公司 | Three-pipe-control total-heat-treating multi-split air conditioning system and independent temperature and humidity control method |
-
2015
- 2015-03-31 CN CN201510151305.7A patent/CN104748428B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08291951A (en) * | 1991-01-10 | 1996-11-05 | Mitsubishi Electric Corp | Air conditioner |
| JPH08291952A (en) * | 1991-01-10 | 1996-11-05 | Mitsubishi Electric Corp | Air conditioner |
| CN1483974A (en) * | 2002-06-12 | 2004-03-24 | Lg������ʽ���� | Multe-unit air conditioner and control method |
| CN1517612A (en) * | 2003-01-16 | 2004-08-04 | Lg������ʽ���� | Duplex air governor with multiple cut-off distributors |
| CN1576730A (en) * | 2003-06-27 | 2005-02-09 | 三星电子株式会社 | Multi-unit type air conditioning equipment and control method thereof |
| JP2006343052A (en) * | 2005-06-10 | 2006-12-21 | Hitachi Ltd | Simultaneous cooling and heating multi-air conditioner |
| CN102635927A (en) * | 2012-04-26 | 2012-08-15 | 青岛海尔空调电子有限公司 | Pressure adjusting device and method for air conditioning systems |
| CN103175344A (en) * | 2013-03-13 | 2013-06-26 | 青岛海信日立空调系统有限公司 | Cold-region used multi-connected heat pump system and control method thereof |
| CN103353147A (en) * | 2013-06-28 | 2013-10-16 | 青岛海信日立空调系统有限公司 | Three-pipe-control total-heat-treating multi-split air conditioning system and independent temperature and humidity control method |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017005036A1 (en) * | 2015-07-06 | 2017-01-12 | 广东美的暖通设备有限公司 | Multi-line apparatus system refrigerant flow control method and device |
| CN105864984A (en) * | 2016-04-27 | 2016-08-17 | 广东美的暖通设备有限公司 | Adjusting method and device for indoor unit electronic expansion valve |
| CN105864984B (en) * | 2016-04-27 | 2018-10-19 | 广东美的暖通设备有限公司 | Electronic expansion valve of indoor unit adjusting method and device |
| CN107975920A (en) * | 2017-11-27 | 2018-05-01 | 宁波奥克斯电气股份有限公司 | Expansion valve control method and multi-line system |
| CN107975920B (en) * | 2017-11-27 | 2020-01-24 | 宁波奥克斯电气股份有限公司 | Expansion valve control method and multi-split system |
| CN108826611A (en) * | 2018-03-19 | 2018-11-16 | 珠海格力电器股份有限公司 | Throttle valve method of adjustment, device, air-conditioning system, storage medium and electronic device |
| CN109059369A (en) * | 2018-08-13 | 2018-12-21 | 宁波奥克斯电气股份有限公司 | A kind of control method of air-conditioning and multi-online air-conditioning system and air conditioner |
| WO2021169672A1 (en) * | 2020-02-28 | 2021-09-02 | 青岛海尔空调电子有限公司 | One-driving-two air conditioner and control method therefor |
| CN113294884A (en) * | 2021-06-21 | 2021-08-24 | 宁波奥克斯电气股份有限公司 | Heating control method and device and air conditioner |
| CN113294884B (en) * | 2021-06-21 | 2022-04-19 | 宁波奥克斯电气股份有限公司 | Heating control method and device and air conditioner |
| CN113465241A (en) * | 2021-07-02 | 2021-10-01 | 广东海悟科技有限公司 | Method for automatically filling refrigerant, automatic filling device and refrigeration equipment |
| CN113465241B (en) * | 2021-07-02 | 2023-02-10 | 广东海悟科技有限公司 | Method for automatically filling refrigerant, automatic filling device and refrigeration equipment |
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