CN101694311A - Multi-connected air conditioning unit with natural cooling function and liquid supplied by liquid pump - Google Patents

Multi-connected air conditioning unit with natural cooling function and liquid supplied by liquid pump Download PDF

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Publication number
CN101694311A
CN101694311A CN200910235429A CN200910235429A CN101694311A CN 101694311 A CN101694311 A CN 101694311A CN 200910235429 A CN200910235429 A CN 200910235429A CN 200910235429 A CN200910235429 A CN 200910235429A CN 101694311 A CN101694311 A CN 101694311A
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China
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valve
liquid
outlet
liquid pump
heat exchanger
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CN200910235429A
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CN101694311B (en
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石文星
周德海
王宝龙
李先庭
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Tsinghua University
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Tsinghua University
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Abstract

A multi-connected air conditioning unit with a natural cooling function and liquid supplied by a liquid pump relates to a multi-connected air conditioning device utilizing the liquid pump to supply liquid to realize natural cooling or mechanical cooling of a plurality of spaces. The multi-connected air conditioning unit comprises an outdoor unit and indoor units, wherein a two-inlet one-outlet three-way valve, a one-inlet two-outlet three-way valve, a low-pressure circulating liquid reservoir, the liquid pump and an outdoor throttle device are arranged in the outdoor unit. The multi-connected air conditioning unit is mainly characterized in that refrigerating circulation and natural circulation are switched by the two-inlet one-outlet three-way valve and the one-inlet two-outlet three-way valve, the spaces can be refrigerated by utilizing steam compression refrigerating circulation in high external temperature or by utilizing natural cooling circulation in low external temperature, and low-temperature liquid generated by the outdoor unit is delivered to each indoor unit by the liquid pump. Compared with the prior art, the multi-connected air conditioning unit utilizes outdoor air cooling capacity to refrigerate sufficiently, shortens running time of a compressor of the air conditioning unit, increases annual running efficiency, and breaks through limitation of the existing natural cooling unit to installation position of the outdoor unit.

Description

A kind of liquid pump to supply refrigerant VRF Air Conditioning System with natural cooling function
Technical field
The present invention relates to a kind of liquid pump to supply refrigerant VRF Air Conditioning System, belong to the refrigeration and air-conditioning technical field with natural cooling function.Being specially adapted to have high density heating spaces such as the building of big inner region and telecommunications room etc. needs the occasion of all-year-around cooling to use.
Background technology
Along with popularizing rapidly and the arriving in 3G network epoch of the extensive use of mainframe computer, mobile communication, data service presents the exploitation impetus of variation, synthesization, the electronic equipment of data machine room also develops rapidly, has surmounted the definition category in common computer room.The medium-and-large-sized commercial server of data machine room will produce a large amount of heats, and the heat flow density of unit construction area is up to number kW/m 2, adopt the conventional floor blowing type of cooling can not will satisfy the technological requirement of effective heat extraction; On the other hand, the annual operation of air conditioner energy consumption of data machine room reaches about 50% of data machine room total energy consumption, has become the bottleneck of the restriction information industry development.For solving the high efficiency and heat radiation problem in high density heating space, the compact airtight air-conditioning machine technology scheme of water-cooling type has been proposed at present, be about to direct the feeding in the cooling coil that is arranged in the data rack of chilled water that handpiece Water Chilling Units is produced, cooling coil is enclosed in compactly with the data rack, and it is directly cooled off, improved cooling effect.The maximum hidden danger of this kind air conditioner is that in a single day cooling coil leaks, and will cause immeasurable loss, and some loss is irremediable.To this, CN 100395488C disclosed " a kind of liquid pump to supply refrigerant VRF Air Conditioning System " technical scheme is directly sent into cold-producing medium in a plurality of cooling coils as shown in Figure 1, has not only solved efficient cooling problem, has also avoided the hidden danger of leaking.Even but this system still needs refrigerating operaton in the winter time, energy consumption is still bigger, so need to propose effective scheme, further reduces the air conditioning energy consumption of data machine room.
Summary of the invention
Deficiency and defective at the existence of all-year-around cooling equipment such as data machine room, the present invention is on the basis of CN 100395488C scheme, a kind of liquid pump to supply refrigerant VRF Air Conditioning System with natural cooling function is provided, freeze with the natural cold-energy that makes full use of outdoor air, shortened the compressor operating time of air-conditioning unit, improve whole year operation efficient, and broken through the existing limitation of utilizing the Natural Circulation cooling unit of weight-driven to outdoor unit installation site.
Purpose of the present invention and task are to realize by the following technical solutions:
A kind of liquid pump to supply refrigerant VRF Air Conditioning System with natural cooling function, comprise outdoor unit 12 and indoor units 13, described outdoor unit 12 comprises compressor 1, an outdoor heat exchanger 2 that links to each other with the exhaust outlet of compressor 1, the liquid pump 6 that 4, one of the throttling arrangements that two ends are parallel with liquid by-passing valve 16 are used to drive the liquid refrigerant circulation with carry out the low pressure recycle reservoir 5 that refrigerant air-liquid separates; Described indoor units 13 is made up of the indoor set heat exchanger 10 of a plurality of parallel connections; The suction inlet of described liquid pump 6 inserts the outlet at bottom of low pressure recycle reservoir 5, and the outlet of liquid pump 6 is connected with the feed pipe of indoor units 13 by the first valve 7a and liquid refrigerant line 8; The muffler of indoor units 13 is connected with the upper entrance of low pressure recycle reservoir 5 with the second valve 7b by gas-liquid two-phase refrigerant line 11, it is characterized in that: comprise also that in outdoor unit 12 one two is advanced one and goes out triple valve 14 and an one-in-and-two-out triple valve 15; Described two advance an import that outes the outlet junction chamber external heat exchanger 2 of triple valve 14, and two inlets connect an outlet of the exhaust outlet and the one-in-and-two-out triple valve 15 of compressor 1 respectively; The inlet of described one-in-and-two-out triple valve 15 is connected with the outlet of the second valve 7b, and 15 another outlets of one-in-and-two-out triple valve link to each other with the upper entrance of low pressure recycle reservoir 5; The top outlet of low pressure recycle reservoir 5 is connected with the suction inlet of compressor 1; The outlet of outdoor heat exchanger 2 is connected with the upper entrance of low pressure recycle reservoir 5; Described compressor 1, two advances one and goes out triple valve 14, outdoor heat exchanger 2, throttling arrangement 4, low pressure recycle reservoir 5, liquid pump 6, the first valve 7a, liquid refrigerant pipeline 8, indoor units 13, gas-liquid two-phase refrigerant tubing 11, the second valve 7b and one-in-and-two-out triple valve 15 formation Vapor Compression Refrigeration Cycle; Described two advance one goes out triple valve 14, outdoor heat exchanger 2, liquid by-passing valve 16, low pressure recycle reservoir 5, liquid pump 6, the first valve 7a, liquid refrigerant pipeline 8, indoor units 13, gas-liquid two-phase refrigerant tubing 11, the second valve 7b and one-in-and-two-out triple valve 15 formation nature cool cycles.
The liquid pump to supply refrigerant VRF Air Conditioning System of another kind of band natural cooling function provided by the invention, comprise outdoor unit 12 and indoor units 13, described outdoor unit 12 comprises compressor 1, an outdoor heat exchanger 2 that links to each other with the exhaust outlet of compressor 1, the liquid pump 6 that 4, one of the throttling arrangements that two ends are parallel with liquid by-passing valve 16 are used to drive the liquid refrigerant circulation with carry out the low pressure recycle reservoir 5 that refrigerant air-liquid separates; Described indoor units 13 is made up of the indoor set heat exchanger 10 of a plurality of parallel connections; The suction inlet of described liquid pump 6 inserts the outlet at bottom of low pressure recycle reservoir 5, and the outlet of liquid pump 6 is connected with the feed pipe of indoor units 13 by the first valve 7a and liquid refrigerant line 8; The muffler of indoor units 13 is connected with the upper entrance of low pressure recycle reservoir 5 with the second valve 7b by gas-liquid two-phase refrigerant line 11, it is characterized in that: described outdoor unit 12 also comprises pressure gas valve 17, cools off valve 18 and low-pressure gas valve 19 naturally; The import of the outlet junction chamber external heat exchanger 2 of described pressure gas valve 17, the inlet of pressure gas valve 17 connects the exhaust outlet of compressor 1; The outlet of the second valve 7b on the described valve 18 of cooling naturally inlet and the gas-liquid two-phase refrigerant tubing 11 is connected, and cools off the import of the outlet junction chamber external heat exchanger 2 of valve 18 naturally; The outlet of the second valve 7b on the inlet of described low-pressure gas valve 19 and the gas-liquid two-phase refrigerant tubing 11 is connected, and the outlet of low-pressure gas valve 19 is connected with the upper entrance of low pressure recycle reservoir 5; The top outlet of low pressure recycle reservoir 5 is connected with the suction inlet of compressor 1; The outlet of outdoor heat exchanger 2 is connected with the upper entrance of low pressure recycle reservoir 5; Described compressor 1, pressure gas valve 17, outdoor heat exchanger 2, throttling arrangement 4, low pressure recycle reservoir 5, liquid pump 6, the first valve 7a, liquid refrigerant pipeline 8, indoor units 13, gas-liquid two-phase refrigerant tubing 11, the second valve 7b and low-pressure gas valve 19 form Vapor Compression Refrigeration Cycle; The described valve 18 of cooling naturally, outdoor heat exchanger 2, liquid by-passing valve 16, low pressure recycle reservoir 5, liquid pump 6, the first valve 7a, liquid refrigerant pipeline 8, indoor units 13, gas-liquid two-phase refrigerant tubing 11 and the second valve 7b form the nature cool cycles.
In above-mentioned two kinds of technical schemes that provide, flow control valve 9 is installed at the inlet of each indoor set heat exchanger 10 of described indoor units 13.Described two advance one goes out triple valve 14 and one-in-and-two-out triple valve 15 employing self-operated three-way valve, electromagnetic type triple valve or electrodynamic type triple valves.Described flow control valve 9, liquid by-passing valve 16, pressure gas valve 17, cooling valve 18 and low-pressure gas valve 19 adopt magnetic valve or motor-driven valves naturally.Described throttling arrangement 4 and liquid by-passing valve 16 adopt integral type Flow-rate adjustment valve member.That described outdoor heat exchanger 2 adopts is air-cooled, water-cooled or transpiration-cooled heat exchanger.
By above technical scheme, the present invention solved effectively VRF Air Conditioning System winter and transition season the energy waste problem during cooling, the scope of application of air-conditioning unit has been expanded in and the security that has improved telecommunication apparatus.Be embodied in: all functions and the advantage that 1. keep and inherited CN 100395488C technical scheme, and in transition season or when winter, outdoor temperature was low, the present invention is switched to natural circulation mode, absorb heat from the indoor, to the ambient side heat release, thereby a small amount of energy input with blower fan and liquid pump operation realizes a large amount of transfer of indoor waste heat amount from the indoor to the ambient side, has improved the whole year operation Energy Efficiency Ratio of whole unit.2. adopt phase change refrigerant as the cold pumped (conveying) medium between indoor units and the outdoor unit, the refrigerant line caliber is little, and installing space is little, helps reducing story height, the hidden danger that having avoided simultaneously leaks brings about great losses.3. adopt liquid pump to supply refrigerant during Natural Circulation, broken through the existing Natural Circulation cooling unit that utilizes weight-driven and required outdoor unit must be installed in limitation on the indoor units.
In addition, technical scheme of the present invention has practical value equally for the cooling energy consumption that reduces big inner region building winter and transition season.Therefore, of the present invention apply with to the sound development of telecommunications industry, enrich the Architectural Equipment category and accelerate the energy-saving and emission-reduction paces all significant.
Description of drawings
Fig. 1 is the structure principle chart of a kind of liquid pump to supply refrigerant VRF Air Conditioning System of CN 100395488C proposition.
Fig. 2 is the structure principle chart of the embodiment one of a kind of liquid pump to supply refrigerant VRF Air Conditioning System with natural cooling function provided by the invention.
Fig. 3 is the structure principle chart of the embodiment two of a kind of liquid pump to supply refrigerant VRF Air Conditioning System with natural cooling function provided by the invention.
Among the figure: the sequence number and the title of each parts are as follows: the 1-compressor; The 2-outdoor heat exchanger; 4-off-premises station throttling arrangement; 5-low pressure recycle reservoir; The 6-liquid pump; 7a-first valve; 7b-second valve; 8-liquid refrigerant connecting line; The 9-flow control valve; 10-indoor set heat exchanger; 11-gas-liquid two-phase refrigerant line; The outdoor unit of 12-; The 13-indoor units; 14-two advances one and goes out triple valve; 15-one-in-and-two-out triple valve; 16-liquid by-passing valve; The 17-pressure gas valve; 18-cools off valve, 19-low-pressure gas valve naturally.
The specific embodiment
Below in conjunction with accompanying drawing concrete structure of the present invention and implementation process are further described.
Embodiment one
Fig. 2 is the structural principle schematic diagram of a kind of liquid pump to supply refrigerant VRF Air Conditioning System with natural cooling function provided by the invention, and this scheme has adopted two to advance one and go out triple valve 14 and one-in-and-two-out triple valve 15.This VRF Air Conditioning System comprises outdoor unit 12 and indoor units 13, described outdoor unit 12 comprises compressor 1, an outdoor heat exchanger 2 that links to each other with the exhaust outlet of compressor 1, the liquid pump 6 that 4, one of the throttling arrangements that two ends are parallel with liquid by-passing valve 16 are used to drive the liquid refrigerant circulation with carry out the low pressure recycle reservoir 5 that refrigerant air-liquid separates; Described indoor units 13 is made up of the indoor set heat exchanger 10 of a plurality of parallel connections; The suction inlet of described liquid pump 6 inserts the outlet at bottom of low pressure recycle reservoir 5, and the outlet of liquid pump 6 is connected with the feed pipe of indoor units 13 by the first valve 7a and liquid refrigerant line 8; The muffler of indoor units 13 is connected with the upper entrance of low pressure recycle reservoir 5 with the second valve 7b by gas-liquid two-phase refrigerant line 11, it is characterized in that: comprise also that in outdoor unit 12 one two is advanced one and goes out triple valve 14 and an one-in-and-two-out triple valve 15; Described two advance an import that outes the outlet junction chamber external heat exchanger 2 of triple valve 14, and two inlets connect an outlet of the exhaust outlet and the one-in-and-two-out triple valve 15 of compressor 1 respectively; The inlet of described one-in-and-two-out triple valve 15 is connected with the outlet of the second valve 7b, and 15 another outlets of one-in-and-two-out triple valve link to each other with the upper entrance of low pressure recycle reservoir 5; The top outlet of low pressure recycle reservoir 5 is connected with the suction inlet of compressor 1; The outlet of outdoor heat exchanger 2 is connected with the upper entrance of low pressure recycle reservoir 5.
Described a kind of liquid pump to supply refrigerant VRF Air Conditioning System with natural cooling function has two kinds of operational modes, i.e. Vapor Compression Refrigeration Cycle pattern and natural cool cycles pattern.
Shown in accompanying drawing 2, during the Vapor Compression Refrigeration Cycle pattern, compressor 1 and liquid pump 6 all move.The high-temperature high-pressure refrigerant gas that compressor 1 is discharged advances one through two and goes out in the triple valve 14 inlet chamber external heat exchangers 2 to be condensed into geothermal liquid in the high pressure, and geothermal liquid enters in the low pressure recycle reservoir 5 after throttling arrangement 4 throttling step-downs in the high pressure; The gaseous refrigerant of the low-pressure low-temperature in the compressor 1 draws low pressure circulation reservoir 5, and be compressed into high temperature and high pressure gaseous refrigerant, finish the steam compression type refrigerating circulation; The liquid refrigerant of the low-temp low-pressure in the low pressure recycle reservoir 5 is after liquid pump 6 superchargings, and heat absorption is evaporated in the machine heat exchanger 10 in the first valve 7a and liquid refrigerant line 8 inlet chambers, the cooling of implementation space; The cryogenic gaseous or the gas-liquid two-phase cold-producing medium that flow out from indoor set heat exchanger 10 flow back to low pressure liquid storage circulator 5 through gas-liquid two-phase refrigerant line 11, the second valve 7b, one-in-and-two-out triple valve 15, and carry out gas-liquid separation at this, liquid is stayed in the low pressure liquid storage circulator 5, and gaseous refrigerant then enters the air intake duct of compressor 1.Liquid refrigerant carries out feed flow with one to multiple multiplying power circulation to indoor units 13 by liquid pump 6, with enhanced heat exchange, and takes back the refrigeration oil that retains in the indoor set heat exchanger 10.
Under natural cool cycles pattern, compressor 1 quits work, liquid pump 6 operations.Low temperature liquid cold-producing medium in the low pressure recycle reservoir 5 is after liquid pump 6 superchargings, and heat absorption is evaporated in the machine heat exchanger 10 in the first valve 7a and liquid refrigerant line 8 inlet chambers, the cooling of implementation space; Cryogenic gaseous that flows out from indoor set heat exchanger 10 or gas-liquid two-phase cold-producing medium advance one through gas-liquid two-phase refrigerant line 11, the second valve 7b, one-in-and-two-out triple valve 15, two and go out in the triple valve 14 inlet chamber external heat exchangers 2 to be condensed into liquid refrigerant, and enter low pressure recycle reservoir 5 through liquid by-passing valve 16.Liquid refrigerant carries out feed flow with one to multiple multiplying power circulation to indoor units 13 by liquid pump 6, with enhanced heat exchange, avoided traditional Natural Circulation to necessarily require of the restriction of outdoor unit simultaneously on indoor units top, the installation site of outdoor unit can freely be provided with, increase flexibility and applicability that unit uses.
Embodiment two
Fig. 3 is the structural principle schematic diagram of the liquid pump to supply refrigerant VRF Air Conditioning System of another kind of band natural cooling function provided by the invention, and this scheme utilized pressure gas valve 17, cool off valve 18 and low-pressure gas valve 19 naturally replaces two among the embodiment one to advance one going out triple valve 14 and one-in-and-two-out triple valve 15.This VRF Air Conditioning System comprises outdoor unit 12 and indoor units 13, described outdoor unit 12 comprises compressor 1, an outdoor heat exchanger 2 that links to each other with the exhaust outlet of compressor 1, the liquid pump 6 that 4, one of the throttling arrangements that two ends are parallel with liquid by-passing valve 16 are used to drive the liquid refrigerant circulation with carry out the low pressure recycle reservoir 5 that refrigerant air-liquid separates; Described indoor units 13 is made up of the indoor set heat exchanger 10 of a plurality of parallel connections; The suction inlet of described liquid pump 6 inserts the outlet at bottom of low pressure recycle reservoir 5, and the outlet of liquid pump 6 is connected with the feed pipe of indoor units 13 by the first valve 7a and liquid refrigerant line 8; The muffler of indoor units 13 is connected with the upper entrance of low pressure recycle reservoir 5 with the second valve 7b by gas-liquid two-phase refrigerant line 11, it is characterized in that: described outdoor unit 12 also comprises pressure gas valve 17, cools off valve 18 and low-pressure gas valve 19 naturally; The import of the outlet junction chamber external heat exchanger 2 of described pressure gas valve 17, the inlet of pressure gas valve 17 connects the exhaust outlet of compressor 1; The outlet of the second valve 7b on the described valve 18 of cooling naturally inlet and the gas-liquid two-phase refrigerant tubing 11 is connected, and cools off the import of the outlet junction chamber external heat exchanger 2 of valve 18 naturally; The outlet of valve 7a on the inlet of described low-pressure gas valve 19 and the gas-liquid two-phase refrigerant tubing 11 is connected, and the outlet of low-pressure gas valve 19 is connected with the upper entrance of low pressure recycle reservoir 5; The top outlet of low pressure recycle reservoir 5 is connected with the suction inlet of compressor 1; The outlet of outdoor heat exchanger 2 is connected with the upper entrance of low pressure recycle reservoir 5.
Described a kind of liquid pump to supply refrigerant VRF Air Conditioning System with natural cooling function still has Vapor Compression Refrigeration Cycle and two kinds of operational modes of natural cool cycles.
When the Vapor Compression Refrigeration Cycle pattern, compressor 1 and liquid pump 6 all move, and pressure gas valve 17 and low-pressure gas valve 19 are all opened, and cooling valve 18 cuts out naturally.The flow process of its cold-producing medium is identical with the Vapor Compression Refrigeration Cycle pattern of embodiment one.Under natural cool cycles pattern, compressor 1 quits work, liquid pump 6 operations, and pressure gas valve 17 and low-pressure gas valve 19 are all closed, and cooling valve 18 is opened naturally.The flow process of its cold-producing medium is identical with the natural cool cycles pattern of embodiment one.

Claims (7)

1. liquid pump to supply refrigerant VRF Air Conditioning System with natural cooling function, comprise outdoor unit (12) and indoor units (13), described outdoor unit (12) comprises compressor (1), an outdoor heat exchanger (2) that links to each other with the exhaust outlet of compressor (1), two ends are parallel with the throttling arrangement (4) of liquid by-passing valve (16), liquid pump (6) that is used to drive the liquid refrigerant circulation with carry out the low pressure recycle reservoir (5) that refrigerant air-liquid separates; Described indoor units (13) is made up of the indoor set heat exchanger (10) of a plurality of parallel connections; The suction inlet of described liquid pump (6) inserts the outlet at bottom of low pressure recycle reservoir (5), and the outlet of liquid pump (6) is connected with the feed pipe of indoor units (13) by first valve (7a) and liquid refrigerant line (8); The muffler of indoor units (13) is connected with the upper entrance of second valve (7b) with low pressure recycle reservoir (5) by gas-liquid two-phase refrigerant line (11), it is characterized in that: comprise also that in outdoor unit (12) one two is advanced one and goes out a triple valve (14) and an one-in-and-two-out triple valve (15); Described two advance an import that outes the outlet junction chamber external heat exchanger (2) of triple valve (14), and two inlets connect an outlet of the exhaust outlet and the one-in-and-two-out triple valve (15) of compressor (1) respectively; The inlet of described one-in-and-two-out triple valve (15) is connected with the outlet of second valve (7b), and another outlet of one-in-and-two-out triple valve (15) links to each other with the upper entrance of low pressure recycle reservoir (5); The top outlet of low pressure recycle reservoir (5) is connected with the suction inlet of compressor (1); The outlet of outdoor heat exchanger (2) is connected with the upper entrance of low pressure recycle reservoir (5); Described compressor (1), two advances one and goes out triple valve (14), outdoor heat exchanger (2), throttling arrangement (4), low pressure recycle reservoir (5), liquid pump (6), first valve (7a), liquid refrigerant pipeline (8), indoor units (13), gas-liquid two-phase refrigerant tubing (11), second valve (7b) and one-in-and-two-out triple valve (15) formation Vapor Compression Refrigeration Cycle; Described two advance one goes out triple valve (14), outdoor heat exchanger (2), liquid by-passing valve (16), low pressure recycle reservoir (5), liquid pump (6), first valve (7a), liquid refrigerant pipeline (8), indoor units (13), gas-liquid two-phase refrigerant tubing (11), second valve (7b) and one-in-and-two-out triple valve (15) formation nature cool cycles.
2. liquid pump to supply refrigerant VRF Air Conditioning System with natural cooling function, comprise outdoor unit (12) and indoor units (13), described outdoor unit (12) comprises compressor (1), an outdoor heat exchanger (2) that links to each other with the exhaust outlet of compressor (1), two ends are parallel with the throttling arrangement (4) of liquid by-passing valve (16), liquid pump (6) that is used to drive the liquid refrigerant circulation with carry out the low pressure recycle reservoir (5) that refrigerant air-liquid separates; Described indoor units (13) is made up of the indoor set heat exchanger (10) of a plurality of parallel connections; The suction inlet of described liquid pump (6) inserts the outlet at bottom of low pressure recycle reservoir (5), and the outlet of liquid pump (6) is connected with the feed pipe of indoor units (13) by first valve (7a) and liquid refrigerant line (8); The muffler of indoor units (13) is connected with the upper entrance of second valve (7b) with low pressure recycle reservoir (5) by gas-liquid two-phase refrigerant line (11), it is characterized in that: described outdoor unit (12) also comprises pressure gas valve (17), cools off valve (18) and low-pressure gas valve (19) naturally; The import of the outlet junction chamber external heat exchanger (2) of described pressure gas valve (17), the inlet of pressure gas valve (17) connects the exhaust outlet of compressor (1); The described inlet of cooling valve (18) naturally is connected with the outlet of second valve (7b) on the gas-liquid two-phase refrigerant tubing (11), cools off the import of the outlet junction chamber external heat exchanger (2) of valve (18) naturally; The outlet of second valve (7b) on the inlet of described low-pressure gas valve (19) and the gas-liquid two-phase refrigerant tubing (11) is connected, and the outlet of low-pressure gas valve (19) is connected with the upper entrance of low pressure recycle reservoir (5); The top outlet of low pressure recycle reservoir (5) is connected with the suction inlet of compressor (1); The outlet of outdoor heat exchanger (2) is connected with the upper entrance of low pressure recycle reservoir (5); Described compressor (1), pressure gas valve (17), outdoor heat exchanger (2), throttling arrangement (4), low pressure recycle reservoir (5), liquid pump (6), first valve (7a), liquid refrigerant pipeline (8), indoor units (13), gas-liquid two-phase refrigerant tubing (11), second valve (7b) and low-pressure gas valve (19) form Vapor Compression Refrigeration Cycle; The described valve (18) of cooling naturally, outdoor heat exchanger (2), liquid by-passing valve (16), low pressure recycle reservoir (5), liquid pump (6), first valve (7a), liquid refrigerant pipeline (8), indoor units (13), gas-liquid two-phase refrigerant tubing (11) and second valve (7b) form the nature cool cycles.
3. according to claim 1 or 2 described a kind of liquid pump to supply refrigerant VRF Air Conditioning System with natural cooling function, it is characterized in that: the inlet at each indoor set heat exchanger (10) of described indoor units (13) is equipped with flow control valve (9).
4. according to the described a kind of liquid pump to supply refrigerant VRF Air Conditioning System with natural cooling function of claim 1, it is characterized in that: described two advance one goes out triple valve (14) and one-in-and-two-out triple valve (15) employing self-operated three-way valve, electromagnetic type triple valve or electrodynamic type triple valve.
5. according to claim 1 or 2 described a kind of liquid pump to supply refrigerant VRF Air Conditioning System, it is characterized in that: described flow control valve (9), liquid by-passing valve (16), pressure gas valve (17), cooling valve (18) and low-pressure gas valve (19) employing magnetic valve or motor-driven valve naturally with natural cooling function.
6. according to claim 1 or 2 described a kind of liquid pump to supply refrigerant VRF Air Conditioning System with natural cooling function, it is characterized in that: described throttling arrangement (4) and liquid by-passing valve (16) adopt integral type Flow-rate adjustment valve member.
7. according to claim 1 or 2 described a kind of liquid pump to supply refrigerant VRF Air Conditioning System with natural cooling function, it is characterized in that: described outdoor heat exchanger (2) adopts air-cooled, water-cooled or transpiration-cooled heat exchanger.
CN2009102354298A 2009-10-23 2009-10-23 Multi-connected air conditioning unit with natural cooling function and liquid supplied by liquid pump Expired - Fee Related CN101694311B (en)

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