CN107178932A - A kind of overlength distance conveys the high energy efficiency VRF Air Conditioning System of refrigerant - Google Patents
A kind of overlength distance conveys the high energy efficiency VRF Air Conditioning System of refrigerant Download PDFInfo
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- CN107178932A CN107178932A CN201610130656.4A CN201610130656A CN107178932A CN 107178932 A CN107178932 A CN 107178932A CN 201610130656 A CN201610130656 A CN 201610130656A CN 107178932 A CN107178932 A CN 107178932A
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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
- F25B29/00—Combined heating and refrigeration systems, e.g. operating alternately or simultaneously
- F25B29/003—Combined heating and refrigeration systems, e.g. operating alternately or simultaneously of the compression type 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
- F25B41/00—Fluid-circulation arrangements
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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
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
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- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Air Conditioning Control Device (AREA)
- Other Air-Conditioning Systems (AREA)
Abstract
The invention discloses the high energy efficiency VRF Air Conditioning System that a kind of overlength distance conveys refrigerant, the Large Copacity multiple refrigeration unit of refrigerant is conveyed including overlength distance, overlength distance conveys the high energy efficiency VRF Air Conditioning System of refrigerant, the Large Copacity multiple refrigeration unit of refrigerant is conveyed using the overlength distance of natural cooling circularly cooling and uses the overlength distance of natural cooling circularly cooling to convey the high energy efficiency VRF Air Conditioning System of refrigerant, the high energy efficiency VRF Air Conditioning System unit of overlength distance conveying refrigerant includes outdoor unit and indoor set, outdoor unit includes outdoor heat exchanger, fluid reservoir, first power transfer pump, gas-liquid separator, compressor and oil eliminator.The present invention can both meet the cooling and heating load demand of building, can also meet the cooling and heating load demand of small and medium construction thing, energy-efficient, it can realize that overlength distance conveys refrigerant medium, complicated frequency conversion drive module is not needed, control is simple, and system reliability is high.
Description
Technical field
The present invention relates to a kind of air conditioner and heat pump unit, specifically a kind of overlength distance conveys the high energy efficiency VRF Air Conditioning System of refrigerant.
Background technology
As industrial technology quality and people are to life, the continuous improvement of comfortable working environment requirement, the domestic demand to central air-conditioning is also by steady growth.Current central air-conditioning not only has started to apply to residential quarters, realizes central heating and cooling, in industrial circle and commercial kitchen area also large-scale application.
Central air-conditioning is the systems for focusing on air conditioning area cooling and heating load, and the cold and hot amount that its unit is produced is to be transported to what air-conditioned room was gone by certain medium, and according to the difference of central air-conditioning pumped (conveying) medium, common central air-conditioning is segmented into three kinds of forms：Using air as the wind system of pumped (conveying) medium, such as air-duct-type air-conditioner unit；Using water as the water system of pumped (conveying) medium, such as centrifuge, screw machine, module machine；Using refrigerant as the refrigerant system of pumped (conveying) medium, such as multi-connected machine.Wind system focuses on formula central air conditioner system to be small-sized, and indoor cooling and heating load is born by the air after processing, and wind system is more suited to family's installation, it is impossible to meets heavy construction place and uses.The unit of water system is that main frame inner compressor compresses fluorinated refrigerant, and then evaporation endothermic is swapped with water in heat exchanger in main frame again, and temperature very low cold water is then transported to indoor set, refrigeration is reached with air heat-exchange.The units' installation is complicated, safeguards that running cost is high, and there is the risk of leak, once leak, to environment, instrument and equipment in building, causes irremediable loss.To multiple on-line system, because compressor capacity is limited, unit capacity is limited, and to realize maximization, the method generally used is single module maximum capacity 20 in set modules combination, current industry, maximum four block combiners, it is possible to achieve whole unit 80.
Prior art is difficult to unit capacity large again, is limited to the use of multiple on-line system.In addition, compressor horsepower is limited, in addition there is crushing in pipeline, cause refrigerant fed distance limited, at present maximum one way 170m, it is impossible to realize that overlength distance conveys refrigerant.
Therefore design develops a kind of vast capacity to meet building hot-cool demand, while realizing that the energy-efficient air-conditioner set tool of overlength distance conveying refrigerant medium is of great significance.
The content of the invention
It is an object of the invention to provide the high energy efficiency VRF Air Conditioning System that a kind of energy-efficient, simple overlength distance of control conveys refrigerant, to solve the problems mentioned in the above background technology.
To achieve the above object, the present invention provides following technical scheme：
A kind of overlength distance conveys the high energy efficiency VRF Air Conditioning System of refrigerant, the Large Copacity multiple refrigeration unit of refrigerant is conveyed including overlength distance, overlength distance conveys high energy efficiency multi-connected air conditioner (heat pump) unit of refrigerant, the Large Copacity multiple refrigeration unit of refrigerant is conveyed using the overlength distance of natural cooling circularly cooling and uses the overlength distance of natural cooling circularly cooling to convey high energy efficiency multi-connected air conditioner (heat pump) unit of refrigerant, the high energy efficiency VRF Air Conditioning System unit of the overlength distance conveying refrigerant includes outdoor unit and indoor set, the outdoor unit includes outdoor heat exchanger, fluid reservoir, first power transfer pump, gas-liquid separator, compressor and oil eliminator, the indoor set includes filter, evaporator, indoor set choke valve and blower fan, the filter includes the first filter and the second filter；Compressor connects oil eliminator respectively by blast pipe in the Large Copacity multiple refrigeration unit of the overlength distance conveying refrigerant, oil return capillary and gas-liquid separator, suction temperature sensor Ts is installed at the compressor return air pipe, exhaust gas temperature sensor Td and high-voltage switch gear HPS are sequentially provided with the tracheae that compressor is connected with oil eliminator, the muffler that compressor is connected with gas-liquid separator is provided with low-pressure sensor Ps, the oil return capillary other end connects oil eliminator by tracheae, the outlet of oil eliminator connects the first check valve by tracheae, the first check valve other end connects outdoor heat exchanger by tracheae, the tracheae that first check valve is connected with outdoor heat exchanger is provided with high-pressure pressure sensor Pd1, outdoor environment temperature sensor Tao is installed on outdoor heat exchanger, the outlet of outdoor heat exchanger is sequentially connected fluid reservoir by liquid pipe, first power transfer pump and liquid pipe stop valve, refrigerant liquid amount control device is installed on the fluid reservoir, the liquid pipe stop valve other end connects the first filter in multigroup indoor set by liquid pipe respectively, the first filter other end is sequentially connected indoor set choke valve by liquid pipe, second filter and evaporator, second filter and the liquid pipe of evaporator connection are provided with interior machine liquid pipe temperature sensor Te2, blower fan is designed with each indoor set, the evaporator other end connects tracheae stop valve by tracheae, the tracheae stop valve other end connects gas-liquid separator by tracheae.
It is used as further technical scheme of the invention：In the high energy efficiency VRF Air Conditioning System of the overlength distance conveying refrigerant four-way valve is additionally provided between the first check valve and tracheae stop valve, four-way valve also connects the gentle liquid/gas separator of outdoor heat exchanger respectively by connecting tube, outdoor heat exchanger coil temperature sensor Tdef is installed on the isocon of outdoor heat exchanger, the second check valve is also associated between outdoor heat exchanger and fluid reservoir, 3rd filter, 4th filter, second triple valve, 3rd check valve, second power transfer pump and one or two outdoor unit electric expansion valve, the outdoor heat exchanger connects the 3rd filter by liquid pipe, the 3rd filter other end connects the second check valve and one or two outdoor unit electric expansion valve by liquid pipe respectively, 4th filter is connected by liquid pipe after the outdoor unit electric expansion valve other end and the second check valve other end are in parallel, the 4th filter other end connects the second triple valve by liquid pipe, the second interface of second triple valve passes sequentially through the 3rd check valve and the second power transfer pump connection fluid reservoir, 3rd interface of the second triple valve is directly connected to fluid reservoir, the 3rd triple valve is additionally provided between the fluid reservoir and liquid pipe stop valve.
It is used as further technical scheme of the invention：The first triple valve is additionally provided between gas-liquid separator and the tracheae stop valve, the first triple valve other end is connected on the tracheae between the first check valve and outdoor heat exchanger by tracheae.
It is used as further technical scheme of the invention：First pressure balance pipe is additionally provided between the fluid reservoir and gas-liquid separator, first pressure balance pipe is provided with the first magnetic valve.
It is used as further technical scheme of the invention：The refrigerant liquid amount control device and the first power transfer pump composition refrigerant liquid amount control system, the refrigerant liquid amount control device uses liquid level gauge, pressure sensor or target flow control device are detected, refrigerant liquid amount control device using pressure sensor to detect when, the pressure sensor includes top pressure sensor Pd2 and base pressure sensor Pd3, refrigerant liquid amount control device using target flow control device to detect when, the target flow control device is switched including the first target stream, second target stream is switched and the second magnetic valve, the first target stream switch, second target stream is switched and the second magnetic valve is all connected with fluid reservoir, the first target stream switch other end connects the second target stream switch other end and the magnetic valve other end respectively.
It is used as further technical scheme of the invention：The 4th check valve is provided between first power transfer pump and liquid pipe stop valve.
It is used as further technical scheme of the invention：Second pressure balance pipe is additionally provided between the fluid reservoir and the second magnetic valve.
It is used as further technical scheme of the invention：The refrigerant liquid amount control device is that the second magnetic valve in target flow control device, and target flow control device replaces with the 4th triple valve.
Compared with prior art, the beneficial effects of the invention are as follows：
The present invention uses helical-lobe compressor, the vast capacity unit of achievable 400 standard tons of maximum, meet the cooling and heating load demand of building, one or more screw compressor or rotor compressor parallel way can also be used, meet the cooling and heating load demand of small and medium construction thing, compressor takes service intermittent mode, the liquid refrigerant of generation is stored in high pressure fluid reservoir, it is energy-efficient, it can realize that overlength distance conveys refrigerant medium, fed distance can be up to more than 1000m, it is not necessary to complicated frequency conversion drive module, control is simple, and system reliability is high.
The Large Copacity multiple refrigeration unit and overlength distance for conveying refrigerant including overlength distance convey the high energy efficiency VRF Air Conditioning System of refrigerant
Brief description of the drawings
Fig. 1 conveys the schematic diagram of the Large Copacity multiple refrigeration unit of refrigerant for overlength distance in the present invention.
Fig. 2 conveys the schematic diagram of the Large Copacity multiple source pump of refrigerant for overlength distance in the present invention.
Fig. 3 realizes the schematic diagram of natural cooling for the Large Copacity multiple refrigeration unit of overlength distance conveying refrigerant in the present invention.
Fig. 4 realizes the schematic diagram of natural cooling for the Large Copacity multiple source pump of overlength distance conveying refrigerant in the present invention.
Fig. 5 is provided with the schematic diagram of first pressure balance pipe for the Large Copacity multiple refrigeration unit of overlength distance conveying refrigerant in the present invention.
Fig. 6 be overlength distance of the present invention conveying refrigerant Large Copacity multiple refrigeration unit in refrigerant liquid amount control device be liquid level gauge schematic diagram.
Fig. 7 be overlength distance of the present invention conveying refrigerant Large Copacity multiple refrigeration unit in refrigerant liquid amount control device be pressure sensor schematic diagram.
Fig. 8 be overlength distance of the present invention conveying refrigerant Large Copacity multiple refrigeration unit in refrigerant liquid amount control device be target flow control device schematic diagram.
Fig. 9 is provided with the schematic diagram of second pressure balance pipe for target flow control device in the Large Copacity multiple refrigeration unit of overlength distance conveying refrigerant in the present invention.
Figure 10 be overlength distance of the present invention conveying refrigerant Large Copacity multiple source pump in refrigerant liquid amount control device schematic diagram.
In figure：1- compressors；2- oil return capillaries；3- oil eliminators；The check valves of 4- first；5- outdoor heat exchangers；The filters of 6- first；7- fluid reservoirs；The power transfer pumps of 8- first；9- liquid pipe stop valves；The filters of 10- second；11- indoor set choke valves；12- evaporators；13- blower fans；14- tracheae stop valves；15- refrigerant liquid amount control devices；16- gas-liquid separators；The magnetic valves of 17- first；18- first pressure balance pipes；19- liquid level gauges；The first targets of 20- stream is switched；The second targets of 21- stream is switched；The magnetic valves of 22- second；The check valves of 23- the 4th；24- second pressure balance pipes；The triple valves of 25- first；26- four-way valves；27- outdoor unit electric expansion valves；The check valves of 29- second；The filters of 30- the 3rd；The filters of 31- the 4th；The triple valves of 32- second；The check valves of 33- the 3rd；The power transfer pumps of 34- second；The triple valves of 35- the 3rd；The triple valves of 36- the 4th.
Embodiment
The technical scheme of this patent is described in more detail with reference to embodiment.
Refer to Fig. 1-4, a kind of overlength distance conveys the high energy efficiency VRF Air Conditioning System of refrigerant, the Large Copacity multiple refrigeration unit of refrigerant is conveyed including overlength distance, overlength distance conveys high energy efficiency multi-connected air conditioner (heat pump) unit of refrigerant, the Large Copacity multiple refrigeration unit of refrigerant is conveyed using the overlength distance of natural cooling circularly cooling and uses the overlength distance of natural cooling circularly cooling to convey high energy efficiency multi-connected air conditioner (heat pump) unit of refrigerant, the high energy efficiency VRF Air Conditioning System unit of the overlength distance conveying refrigerant includes outdoor unit and indoor set, indoor set total capacity is no more than the 130% of outdoor unit ability, the outdoor unit includes outdoor heat exchanger 5, fluid reservoir 7, first power transfer pump 8, gas-liquid separator 16, compressor 1 and oil eliminator 3, the indoor set includes filter, evaporator 12, electric expansion valve 11 and blower fan 13, the filter includes the first filter 6 and the second filter 10.The outdoor unit and indoor set are each provided with controller and are independently controlled, connected between outdoor controller and indoor machine controller by connection, realize the communication between indoor set and outdoor unit, indoor set receives start or the shutdown command of remote control or line control machine, the instruction is passed to outdoor unit by indoor set, and outdoor unit controls its each part.
Compressor 1 connects oil eliminator 3 by blast pipe respectively in the Large Copacity multiple refrigeration unit of the overlength distance conveying refrigerant,Oil return capillary 2 and gas-liquid separator 16,Suction temperature sensor Ts is installed at the muffler of compressor 1,Exhaust gas temperature sensor Td and high-voltage switch gear HPS are sequentially provided with the tracheae that compressor 1 is connected with oil eliminator 3,The muffler that compressor 1 is connected with gas-liquid separator 16 is provided with low-pressure sensor Ps,The other end of oil return capillary 2 connects oil eliminator 3 by tracheae,The outlet of oil eliminator 3 connects the first check valve 4 by tracheae,The other end of first check valve 4 connects outdoor heat exchanger 5 by tracheae,The tracheae that first check valve 4 is connected with outdoor heat exchanger 5 is provided with high-pressure pressure sensor Pd1,Outdoor environment temperature sensor Tao is installed on outdoor heat exchanger 5,The outlet of outdoor heat exchanger 5 is sequentially connected fluid reservoir 7 by liquid pipe,First power transfer pump 8 and liquid pipe stop valve 9,The overlength distance conveying of refrigerant in Large Copacity multiple refrigeration unit is realized using the first power transfer pump 8,Refrigerant liquid amount control device 15 is installed on the fluid reservoir 7,The other end of liquid pipe stop valve 9 connects the first filter 6 in multigroup indoor set by liquid pipe respectively,The other end of first filter 6 is sequentially connected indoor set choke valve 11 by liquid pipe,Second filter 10 and evaporator 12,Indoor set choke valve 11 can be electric expansion valve,The liquid pipe that second filter 10 and evaporator 12 are connected is provided with interior machine liquid pipe temperature sensor Te2,Blower fan 13 is equipped with every indoor set,The other end of evaporator 12 connects tracheae stop valve 14 by tracheae,The other end of tracheae stop valve 14 connects gas-liquid separator 16 by tracheae.
Refer to Fig. 2, in the high energy efficiency VRF Air Conditioning System of the overlength distance conveying refrigerant four-way valve 26 is additionally provided between the first check valve 4 and tracheae stop valve 14, four-way valve 26 also connects outdoor heat exchanger 5 and gas-liquid separator 16 respectively by connecting tube, outdoor heat exchanger coil temperature sensor Tdef is installed on the isocon of outdoor heat exchanger 5, the second check valve 29 is also associated between outdoor heat exchanger 5 and fluid reservoir 7, 3rd filter 30, 4th filter 31, second triple valve 32, 3rd check valve 33, second power transfer pump 34 and one or two outdoor unit electric expansion valve 27, the overlength distance conveying of refrigerant in Large Copacity multiple source pump is realized using the first power transfer pump 8 and the second power transfer pump 34, the outdoor heat exchanger 5 connects the 3rd filter 30 by liquid pipe, the other end of 3rd filter 30 connects the second check valve 29 and one or two outdoor unit electric expansion valve 27 by liquid pipe respectively, 4th filter 31 is connected by liquid pipe after the other end of outdoor unit electric expansion valve 27 and the other end of the second check valve 29 are in parallel, the other end of 4th filter 31 connects the second triple valve 32 by liquid pipe, the second interface of second triple valve 32 passes sequentially through the 3rd check valve 33 and the second power transfer pump 34 connection fluid reservoir 7, 3rd interface of the second triple valve 32 is directly connected to fluid reservoir 7, the 3rd triple valve 35 is additionally provided between the fluid reservoir 7 and liquid pipe stop valve 9.
Refer to Fig. 3-4, the overlength distance of the use natural cooling circularly cooling conveys in the Large Copacity multiple refrigeration unit of refrigerant and the high energy efficiency VRF Air Conditioning System using the overlength distance conveying refrigerant of natural cooling circularly cooling and the first triple valve 25 is additionally provided between gas-liquid separator 16 and tracheae stop valve 14, the other end of first triple valve 25 is connected on the tracheae between the first check valve 4 and outdoor heat exchanger 5 by tracheae, the switching of refrigerant flow direction can be realized by the first triple valve 25, so as to realize that natural cooling is circulated, the purpose of energy-conservation is realized.
Outdoor controller controls the running status of compressor 1, including opening, operation and shutdown, control the operation of outdoor heat exchanger 5, to air cooling heat exchanger, control the operation of blower fan 13, to water cooling heat exchanger, it is then the operation for controlling water pump, the aperture of the outdoor electromechanical sub- expansion valve 27 of control, the ON/OFF running status of first power transfer pump 8 and the second power transfer pump 34, first triple valve 25, the ON/OFF of second triple valve 32 and the 3rd triple valve 35, the ON/OFF of four-way valve 26, indoor machine controller controls the aperture of respective indoor set choke valve 11, the running status of blower fan 13.Indoor set can control the operation of each indoor set using wireless line control machine/remote control or cable controller; including freezing, heating, shut down, blow, dehumidify, five kinds of states such as automatic running; Centralized Controller can also be used, a Centralized Controller can control indoor sets all in a set of unit.
Please be refering to Fig. 2-7, the Large Copacity multiple refrigeration unit and overlength distance of the overlength distance conveying refrigerant are conveyed is additionally provided with first pressure balance pipe 18 between fluid reservoir 7 and gas-liquid separator 16 in the high energy efficiency VRF Air Conditioning System of refrigerant, first pressure balance pipe 18 is provided with the first magnetic valve 17, gaseous coolant in convenient discharge fluid reservoir 7, when compressor 1 is operated, open the first magnetic valve 17 on first pressure balance pipe 18, the gaseous coolant for being easy to compressor 1 quickly to suck in fluid reservoir 7, when compressor 1 is closed, close the first magnetic valve 17, prevent the gaseous coolant in gas-liquid separator 16 from pouring in down a chimney into fluid reservoir 7.
Refer to Fig. 6-9, the power transfer pump 8 of refrigerant liquid amount control device 15 and first composition refrigerant liquid amount control system in the Large Copacity multiple refrigeration unit of the overlength distance conveying refrigerant, the refrigerant liquid amount control device 15 is controlled using liquid level gauge 19, pressure sensor or target flow control device.
The refrigerant liquid amount control device 15 is controlled using liquid level gauge 19, pressure sensor or target flow control device, refrigerant liquid amount control device 15 using liquid level gauge 19 to control when, the liquid level collected according to liquid level gauge 19 determines the running status of compressor 1, when the refrigerant level height change in fluid reservoir 7, cause its capacitance variations, the change of liquid level is converted into standard current signal by electric capacity, outdoor controller is passed to, the ON/OFF opened/stopped with the first delivery pump 8 of compressor 1 is controlled by outdoor controller.When liquid level controls the setting value of program higher than outdoor controller; compressor 1 is shut down; first power transfer pump 8 is in open state; convey refrigerant circulation; when liquid level controls the setting value of program less than controller; compressor 1 is opened, and the first power transfer pump 8 is in open state, conveys refrigerant circulation.
Refrigerant liquid amount control device 15 using pressure sensor to control when, the pressure sensor includes top pressure sensor Pd2 and base pressure sensor Pd3, test the pressure of the top and bottom of fluid reservoir 7 respectively using top pressure sensor Pd2 and base pressure sensor Pd3, calculate 2 points of pressure differential, the liquid level and refrigerant amount of refrigerant are further calculated, the running status to control the first power transfer pump 8 and compressor 1.Refrigerant liquid amount control device 15 using target flow control device to control when, the target flow control device includes the first target stream switch 20, second target stream switch 21 and the second magnetic valve 22, the first target stream switch 20, second target stream switch 21 and the second magnetic valve 22 are all connected with fluid reservoir 7, first target stream switchs 20 other ends and connects the second target stream 21 other ends of switch and the other end of the second magnetic valve 22 respectively, second pressure balance pipe 24 can be provided between the magnetic valve 22 of fluid reservoir 7 and second, avoid influence of the gaseous coolant of the shwoot of fluid reservoir 7 to the first target stream switch 20 and the second target stream switch 21, the 4th check valve 23 is provided between first power transfer pump 8 and liquid pipe stop valve 9, magnetic valve SV4 is opened during refrigeration, when the first target stream switch 20 and the second target stream switch 21 detect refrigerant flowing, show that the refrigerant level in fluid reservoir 7 reaches certain setting value, now, compressor 1 is shut down, first power transfer pump 8 is in open state, convey refrigerant circulation, complete kind of refrigeration cycle.
Refer to Figure 10, refrigerant liquid amount control device 15 is target flow control device in the high energy efficiency VRF Air Conditioning System of the overlength distance conveying refrigerant, and the second magnetic valve 22 in the target flow control device of the Large Copacity multiple refrigeration unit of overlength distance conveying refrigerant is replaced with into the 4th triple valve 36.
The present invention is in refrigeration, the refrigerant that refrigerant coexists after the condensation of outdoor heat exchanger 5 into liquid or gas-liquid, it is stored in fluid reservoir 7, in the Large Copacity multiple refrigeration unit that overlength distance conveys refrigerant, when one or more indoor set is received from remote control or line control machine, the refrigeration start-up command that Centralized Controller is sent, and the instruction is passed to outdoor unit by connection, blower fan 13 opens operating in the indoor set of start, rotating speed is run according to the rotating speed of setting, indoor set choke valve 11 opens the initial opening of a setting, then it is adjusted according to the degree of superheat, standby indoor set blower fan 13 is shut down, indoor set choke valve 11 is closed, now compressor 1 starts operating, to air cooling heat exchanger, outdoor fan 13 is opened, to water cooling heat exchanger, water pump is opened；Refrigerant after the compression of compressor 1 into HTHP gaseous refrigerant, then condensed by outdoor heat exchanger 5 and turn into the higher liquid refrigerant of pressure, be stored under pressure in fluid reservoir.To air-cooled outdoor heat exchanger, the rotating speed of blower fan, open/close state are controlled according to the high-pressure pressure sensor Pd1 high-pressures detected, the rotating speed of blower fan 13 can also be controlled according to outdoor environment temperature or the middle part coil temperature of outdoor heat exchanger 5.During refrigeration, the high energy efficiency VRF Air Conditioning System of refrigerant is conveyed to overlength distance, four-way valve 26 is in not power-up state, the standard-sized sheet of outdoor unit electric expansion valve 27, second triple valve 32 is opened to the direction for flowing to fluid reservoir 7, 3rd triple valve 35 is opened to the direction for flowing to liquid pipe stop valve 9, to the fluid reservoir 7 using target flow control device, 4th triple valve 36 is opened to the direction for flowing to the first power transfer pump 8, the standard-sized sheet of outdoor unit electric expansion valve 27, do not throttle, under pressure, refrigerant, which enters in fluid reservoir 7, to be stored, first power transfer pump 8 is opened, second power transfer pump 34 is closed, under the pumping of the first power transfer pump 8, cold-producing medium stream is through each indoor set choke valve 11, indoor set choke valve 11 throttles to refrigerant, the aperture of indoor set choke valve 11 is controlled according to the tracheae temperature Te1 and liquid pipe temperature Te2 of each indoor set degree of superheat T, wherein T=Te1-Te2, refrigerant after throttling evaporates in evaporator 12, absorb the heat in indoor environment, reach the purpose of refrigeration, heat absorption is evaporated and enters gas-liquid separator 16 by tracheae as the relatively low steam of pressure, it is eventually returned to compressor 1, so as to complete the overlength distance kind of refrigeration cycle of kinetic pump conveying.
When outdoor environment temperature is relatively low, compressor 1 may be at stopped status, and the first triple valve 25 is opened to the direction of refrigerant flow direction outdoor heat exchanger 5, and the circulation of refrigerant is realized by the first power transfer pump 8, complete kind of refrigeration cycle.
The overlength distance conveys the high energy efficiency VRF Air Conditioning System of refrigerant, when heating, the refrigerant that refrigerant coexists after the condensation of evaporator 12 into liquid or gas-liquid, is stored in fluid reservoir 7.When one or more indoor set is received start-up command is heated from what remote control or line control machine, Centralized Controller were sent, and the instruction is passed to outdoor unit by connection, the blower fan 13 of start is in anti-cold wind state, and the standard-sized sheet of indoor set choke valve 11, compressor 1 starts operating；To air cooling heat exchanger, blower fan 13 is opened, and to water cooling heat exchanger, water pump is opened；Four-way valve 26 is in power-up state, outdoor unit electric expansion valve 27 opens the initial opening of a setting, then it is adjusted according to the degree of superheat, 3rd triple valve 35 is opened to the direction for flowing to fluid reservoir 7, second triple valve 32 is opened to the direction for flowing to indoor set choke valve 11, after compressor 1 starts, refrigerant by compressor 1 compression after into HTHP gaseous refrigerant, flow through the pipeline of four-way valve 26, now four-way valve 26 is in power-up state, again heat is released by evaporator 12, in the presence of blower fan 13, heat exchange is carried out with room air, room air absorbs heat, reach and heat purpose.The refrigerant after heat is released by liquid pipe section, flow into fluid reservoir 7, second power transfer pump 34 is opened, first power transfer pump 8 is closed, under the pumping of the second power transfer pump 34, cold-producing medium stream is through outdoor unit electric expansion valve 27, outdoor unit electric expansion valve 27 throttles to refrigerant, outdoor unit electric expansion valve 27 is according to suction superheat control, refrigerant after throttling evaporates in outdoor heat exchanger 5, then steam flows through four-way valve 26 into gas-liquid separator 16, is eventually returned to compressor 1, and completion heats circulation.
The present invention uses helical-lobe compressor, the vast capacity unit of achievable 400 standard tons of maximum, meet the cooling and heating load demand of building, one or more screw compressor or rotor compressor parallel way can also be used, similar to conventional multi-connected machine, the cooling and heating load demand of small and medium construction thing is met；Compressor 1 takes service intermittent mode, the liquid refrigerant of generation is stored in fluid reservoir 7, refrigerant is conveyed by power transfer pump, when the refrigerant in fluid reservoir 7 reaches certain liquid level, compressor 1 is stopped, when the liquid level detected drops to certain level value, compressor 1 opens operation, compressor 1 is much smaller than because the power of power transfer pump is super, when compressor 1 is stopped, energy consumption is low, it is possible to achieve energy-efficient；When ambient temperatures are low, can be completely without using compressor, refrigerant circulation is realized using power transfer pump, reach refrigeration, due to conveying refrigerant using power transfer pump, it can realize that overlength distance conveys refrigerant medium, fed distance can be up to more than 1000m, building is used, have great importance, on the one hand outdoor unit can be arranged on super remote position, the crowd in building is avoided to be disturbed by noise, installation site is flexible, in addition, indoor set may be mounted at different positions, realize the fixed point conveying of the cold of diverse location and heat in building；Frequency-changeable compressor can not be used, and uses screw machine, invariable frequency compressor, it is not necessary to which complicated frequency conversion drive module, control is simple, system reliability is high.
It is obvious to a person skilled in the art that the invention is not restricted to the details of above-mentioned one exemplary embodiment, and without departing from the spirit or essential characteristics of the present invention, the present invention can be realized in other specific forms.Therefore, no matter from the point of view of which point, embodiment all should be regarded as exemplary, and be nonrestrictive, the scope of the present invention is limited by appended claims rather than described above, it is intended that all changes fallen in the implication and scope of the equivalency of claim are included in the present invention.Any reference in claim should not be considered as to the claim involved by limitation.
In addition, it should be understood that, although the present specification is described in terms of embodiments, but not each embodiment is only comprising an independent technical scheme, this narrating mode of specification is only for clarity, the skilled in the art should refer to the specification as a whole, and the technical solutions in the various embodiments may also be suitably combined, and other embodiments which can be understood by those skilled in the art for formation.
Claims (8)
1. a kind of overlength distance conveys the high energy efficiency VRF Air Conditioning System of refrigerant, including overlength distance conveys the big of refrigerant
Capacity multiple refrigeration unit, overlength distance are conveyed the high energy efficiency VRF Air Conditioning System of refrigerant, circulated using natural cooling
The Large Copacity multiple refrigeration unit and the super long distance using natural cooling circularly cooling of the overlength distance conveying refrigerant of refrigeration
From the high energy efficiency VRF Air Conditioning System of conveying refrigerant, the overlength distance conveys the high energy efficiency multi-connected air conditioner of refrigerant
Group unit includes outdoor unit and indoor set, it is characterised in that the outdoor unit includes outdoor heat exchanger (5), fluid reservoir
(7), the first power transfer pump (8), gas-liquid separator (16), compressor (1) and oil eliminator (3), it is indoor
Machine includes filter, evaporator (12), indoor set choke valve (11) and blower fan (13), and the filter includes first
Filter (6) and the second filter (10)；In the Large Copacity multiple refrigeration unit of the overlength distance conveying refrigerant
Compressor (1) connects oil eliminator (3), oil return capillary (2) and gas-liquid separator (16) by blast pipe respectively,
Suction temperature sensor Ts is installed at compressor (1) muffler, compressor (1) is connected with oil eliminator (3)
Tracheae on be sequentially provided with exhaust gas temperature sensor Td and high-voltage switch gear HPS, compressor (1) and gas-liquid separator (16)
The muffler of connection is provided with low-pressure sensor Ps, and oil return capillary (2) other end connects oil eliminator by tracheae
(3), the outlet of oil eliminator (3) connects the first check valve (4) by tracheae, and the first check valve (4) other end leads to
Tracheae connection outdoor heat exchanger (5) is crossed, the tracheae that the first check valve (4) is connected with outdoor heat exchanger (5) is provided with height
Outdoor environment temperature sensor Tao, outdoor heat exchanger (5) are installed on pressure pressure sensor Pd1, outdoor heat exchanger (5)
Outlet fluid reservoir (7), the first power transfer pump (8) and liquid pipe stop valve (9) are sequentially connected by liquid pipe, it is described
Refrigerant liquid amount control device (15) is installed, liquid pipe stop valve (9) other end is distinguished by liquid pipe on fluid reservoir (7)
The first filter (6) in many indoor sets is connected, the first filter (6) other end is sequentially connected indoor set by liquid pipe
Choke valve (11), the second filter (10) and evaporator (12), the second filter (10) and evaporator (12) are even
The liquid pipe connect is provided with interior machine liquid pipe temperature sensor Te2, and blower fan (13), evaporator (12) are designed with every group of indoor set
The other end connects tracheae stop valve (14) by tracheae, and tracheae stop valve (14) other end connects gas-liquid separation by tracheae
Device (16).
2. overlength distance according to claim 1 conveys the high energy efficiency multiple source pump of refrigerant, it is characterised in that
First check valve (4) and tracheae stop valve (14) in the high energy efficiency VRF Air Conditioning System of the overlength distance conveying refrigerant
Between be additionally provided with four-way valve (26), four-way valve (26) also connects outdoor heat exchanger (5) and gas-liquid respectively by connecting tube
Outdoor heat exchanger coil temperature sensor Tdef, room are installed on separator (16), the isocon of outdoor heat exchanger (5)
The second check valve (29), the 3rd filter (30), the 4th are also associated between external heat exchanger (5) and fluid reservoir (7)
Filter (31), the second triple valve (32), the 3rd check valve (33), the second power transfer pump (34) and one or
Two outdoor unit electric expansion valves (27), the outdoor heat exchanger (5) connects the 3rd filter (30) by liquid pipe,
3rd filter (30) other end connects the second check valve (29) by liquid pipe respectively and one or two outdoor unit electronics is swollen
Pass through liquid pipe after swollen valve (27), outdoor unit electric expansion valve (27) other end and the second check valve (29) other end are in parallel
The 4th filter (31) is connected, the 4th filter (31) other end connects the second triple valve (32), second by liquid pipe
The second interface of triple valve (32) passes sequentially through the 3rd check valve (33) and the second power transfer pump (34) connection fluid reservoir
(7), the 3rd interface of the second triple valve (32) is directly connected to fluid reservoir (7), and the fluid reservoir (7) and liquid pipe are cut
Only the 3rd triple valve (35) is additionally provided between valve (9).
3. the high energy efficiency VRF Air Conditioning System unit of refrigerant is conveyed according to any described overlength distances of claim 1-2,
Characterized in that, conveying the Large Copacity multiple refrigeration unit of refrigerant using the overlength distance of natural cooling circularly cooling and adopting
Conveyed with the overlength distance of natural cooling circularly cooling in the high energy efficiency VRF Air Conditioning System of refrigerant, the gas-liquid separator
(16) the first triple valve (25) is additionally provided between tracheae stop valve (14), the first triple valve (25) other end passes through
Tracheae is connected on the tracheae between the first check valve (4) and outdoor heat exchanger (5).
4. the high energy efficiency VRF Air Conditioning System unit of refrigerant is conveyed according to any described overlength distances of claim 1-2,
Characterized in that, first pressure balance pipe (18) is additionally provided between the fluid reservoir (7) and gas-liquid separator (16),
First pressure balance pipe (18) is provided with the first magnetic valve (17).
5. the high energy efficiency VRF Air Conditioning System unit of refrigerant is conveyed according to any described overlength distances of claim 1-2,
Characterized in that, the refrigerant liquid amount control device (15) and the first power transfer pump (8) composition refrigerant liquid measure control
System processed, the refrigerant liquid amount control device (15) is using liquid level gauge (19), pressure sensor or target flow control device
To detect, when refrigerant liquid amount control device (15) is detected using pressure sensor.If detected using pressure sensor,
The pressure sensor includes top pressure sensor Pd2 and base pressure sensor Pd3, refrigerant liquid amount control device
(15) during using target flow control device detecting, the target flow control device includes the first target stream switch (20), the second target
Stream switch (21) and the second magnetic valve (22), the first target stream switch (20), the second target stream switch (21) and the
Two magnetic valves (22) are all connected with fluid reservoir (7), and the first target stream switch (20) other end connects the second target stream switch respectively
(21) other end and the second magnetic valve (22) other end.
6. overlength distance according to claim 2 conveys the high energy efficiency VRF Air Conditioning System of refrigerant, it is characterised in that
The 4th check valve (23) is provided between first power transfer pump (8) and liquid pipe stop valve (9).
7. overlength distance according to claim 2 conveys the high energy efficiency VRF Air Conditioning System of refrigerant, it is characterised in that
Second pressure balance pipe (24) is additionally provided between the fluid reservoir (7) and the second magnetic valve (22).
8. overlength distance according to claim 2 conveys the Large Copacity multiple heat pump air conditioner unit of refrigerant, its feature
It is, the refrigerant liquid amount control device (15) is the second magnetic valve in target flow control device, and target flow control device
(22) the 4th triple valve (36) is replaced with.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610130656.4A CN107178932A (en) | 2016-03-09 | 2016-03-09 | A kind of overlength distance conveys the high energy efficiency VRF Air Conditioning System of refrigerant |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610130656.4A CN107178932A (en) | 2016-03-09 | 2016-03-09 | A kind of overlength distance conveys the high energy efficiency VRF Air Conditioning System of refrigerant |
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ID=59829575
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610130656.4A Pending CN107178932A (en) | 2016-03-09 | 2016-03-09 | A kind of overlength distance conveys the high energy efficiency VRF Air Conditioning System of refrigerant |
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| CN110500827A (en) * | 2018-10-16 | 2019-11-26 | 宁波市海智普智能科技有限公司 | A kind of heat pump system for realizing air-conditioning, floor heating, domestic hot-water's trilogy supply |
| CN112584684A (en) * | 2020-12-30 | 2021-03-30 | 江苏佰睿安新能源科技有限公司 | Heat pipe energy-saving system for temperature adjustment of machine room and refrigerating capacity control system thereof |
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