CN102753913A - Air conditioner - Google Patents
Air conditioner Download PDFInfo
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- CN102753913A CN102753913A CN2011800094588A CN201180009458A CN102753913A CN 102753913 A CN102753913 A CN 102753913A CN 2011800094588 A CN2011800094588 A CN 2011800094588A CN 201180009458 A CN201180009458 A CN 201180009458A CN 102753913 A CN102753913 A CN 102753913A
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- Prior art keywords
- pipe
- compressor
- oil
- distributor
- lubricating oil
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
- F24F3/06—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the arrangements for the supply of heat-exchange fluid for the subsequent treatment of primary air in the room units
- F24F3/065—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the arrangements for the supply of heat-exchange fluid for the subsequent treatment of primary air in the room units with a plurality of evaporators or condensers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
- F24F1/26—Refrigerant piping
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
- F24F1/26—Refrigerant piping
- F24F1/30—Refrigerant piping for use inside the separate outdoor 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
- F25B31/00—Compressor arrangements
- F25B31/002—Lubrication
- F25B31/004—Lubrication oil recirculating 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
- 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
- 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
- F25B2313/0233—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple indoor units in parallel 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
- F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
- F25B2313/025—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple outdoor units
- F25B2313/0253—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple outdoor units in parallel 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
- F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
- F25B2313/027—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means
- F25B2313/02741—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means using one four-way valve
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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
- F25B2400/07—Details of compressors or related parts
- F25B2400/075—Details of compressors or related parts with parallel compressors
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
- Compressor (AREA)
- Other Air-Conditioning Systems (AREA)
Abstract
Disclosed is an air conditioner provided with: oil equalizing pipes (30a to 30c) which remove the lubricating oil that remains in an oil separator (7) and in compressors (3a to 3c) when the amount of the lubricating oil remaining therein is at a pre-defined amount or more; a distributor (43) which distributes the lubricating oil introduced from the oil separator (7) and the oil equalizing pipes (30a to 30c) between a plurality of paths; and oil return pipes (55 to 57) which link the distribution paths of the distributor (43) and refrigerant suction refrigerant pipes (18a to 18c) of the compressors (3a to 3c), and return the lubricating oil to the compressors (3a to 3c). The distributor (43) is attached to a refrigerant suction pipe (16) of the compressors (3a to 3c) along the horizontal section of the refrigerant suction pipe (16) in a manner such that the distributor (43) is disposed horizontally. As a consequence, the distributor (43) is easily and certainly immobilized, production variation is reduced, and pipe fatigue and damage are prevented by avoiding stress concentration in the pipes, which may occur when the compressors (3a to 3c) are driven.
Description
Technical field
The present invention relates to a kind ofly constitute the air conditioner of kind of refrigeration cycle, relate to the improvement that is used for lubricating oil is accumulated in equably the oil return structure of each compressor especially by the off-premises station with multiple compressors and a plurality of indoor set.
Background technology
There is a kind of being adapted at most to have the air conditioner that uses in the building of a plurality of air conditioning areas.In this air conditioner, comprise the oil return loop, this oil return loop forms takes out via oil equalizing pipe respectively lodging in the lubricating oil that each compressor reaches more than the ormal weight, and the lubricating oil that is taken out is transferred to the not enough compressor of lubricating oil.
In addition, owing to the gas refrigerant of the HTHP of discharging, contain the oil component of lubricating oil from each compressor, and have multiple compressors, therefore, the amount of the lubricating oil of being discharged also can not be ignored.Therefore, in kind of refrigeration cycle, be provided with oil eliminator, separate with the oil component that will discharge lubricating oil contained in the gas.Separated lubricating oil family also is back to each compressor via the oil return loop.
Can problem be make lubricating oil to be back to each compressor equably, and too much or not enough situation do not occur.For fear of the imbalance of oil mass, can consider in the oil return loop, electromagnetic switching valve to be set, but this can impact cost.If to detect pasta is purpose and capillary is installed in the oil return loop, then can't change and operating number changes corresponding to the running capacity of compressor, cause recirculating oil quantity difference to occur.
For example, as be connected with three compressors, returning of distributing of lubricating oil used bifurcated pipe, disclose use and can carry out the example (for example Japanese Patent Laid is opened the 2006-112668 communique) that the tripartite branched portion that distributes replaces T type pipe.
Specifically, above-mentioned branched portion is made up of the filter screen portion of the inflow entrance with lubricating oil, the tube connector portion that an end is connected with the flow export of this filter screen portion and the distributor that is connected with the other end of this tube connector portion.Be provided with a plurality of outflow streams in the end of above-mentioned distributor, it is communicated with flow export respectively.
Summary of the invention
For fear of the pipe arrangement fatigue damage, the distributor that is used for cold-producing medium shunting normally is provided with across certain distance with vibration source such as compressor.But the secondary side pipe arrangement that is used for the distributor of oil return is connected to the refrigerant suction pipe that storage tank is communicated with the suction portion of compressor.
Therefore, very the position near compressor is provided with distributor, is accompanied by the driving of compressor and the vibration meeting that produces is passed to distributor from the secondary side pipe arrangement, causes the pipe arrangement fatigue damage easily.And, the disclosed current divider of above-mentioned document be mounted to inflow entrance towards the bottom, flow export is the approximate vertical posture towards top, so that lubricating oil is from flow down up.
If branched portion is obliquely installed, then the lubricating oil in the pipe arrangement can be amesiality, and under the situation of branched portion shunting, lubricating oil will be shunted under amesiality state.Branched portion is set to vertical position though put down in writing for the foregoing reasons, and this is the structure that the vibration of transmitting from compressor is enlarged, thereby further aggravation pipe arrangement fatigue rupture.
The present invention is based on above-mentioned situation and accomplishes; Its purpose is to provide a kind of air conditioner; It comprises a plurality of compressors, can be easily and reliably to fixing for making oil return the distributor that each compressor is provided with equably, can reduce manufacture deviation; And the piping stress that can avoid being accompanied by the driving of compressor and produce is concentrated, to realize preventing the pipe arrangement fatigue damage.
For satisfying above-mentioned purpose, air conditioner of the present invention is
Constitute kind of refrigeration cycle by the off-premises station that comprises a plurality of compressors that are connected in parallel and a plurality of indoor set, have: oil equalizing pipe, this oil equalizing pipe will accumulate in and reach the above lubricating oil taking-up of ormal weight in each compressor; Distributor, this distributor is derived lubricating oil from above-mentioned oil equalizing pipe, and is dispensed to a plurality of streams; And oil return pipe; This oil return pipe is communicated with the distribution stream of above-mentioned distributor with the refrigerant suction pipe of each compressor; And make lubricating oil be back to each compressor; Above-mentioned distributor is along the horizontal component of the refrigerant suction pipe of compressor, and is mounted on refrigerant suction pipe with flat-hand position.
Description of drawings
Fig. 1 is the refrigeration cycle structure figure of the air conditioner of an embodiment of the present invention.
Fig. 2 is the stereogram to the oil return structure of compressor oil return of the above-mentioned embodiment of expression.
Fig. 3 is the side view of structure of the distributor of the above-mentioned embodiment of expression.
The specific embodiment
Below, based on accompanying drawing embodiment of the present invention is described.
Fig. 1 is the refrigeration cycle structure figure of air conditioner.
Above-mentioned air conditioner is made up of indoor set 2A～2D of an off-premises station 1 and Duo Tai (is four at this).
In above-mentioned off-premises station 1, be provided with multiple compressors, i.e. the first compressor 3a, the second compressor 3b and the 3rd compressor 3c.The discharging refrigerant pipe 4a～4c that is connected with each compressor 3a～3c is provided with check valve 5a～5c, and the discharging refrigerant pipe converges at a refrigerant pipe 6.In other words, the first compressor 3a～first compressor 3c is connected in parallel in refrigerant pipe 6.
On this refrigerant pipe 6, be connected with the first port Qa and the second port Qb of oil eliminator 7, cross valve 8, two outdoor heat converter 9a that are connected in parallel, 9b, two outdoor expansion valve 10a that are connected in parallel, 10b, fluid box 11, first filler valve 12; Wherein, Above-mentioned oil eliminator 7 has the function that lubricating oil family contained in the gas refrigerant is separated, and above-mentioned first filler valve 12 is connecting portions of the liquid line 20 of off-premises station 1.The refrigerant pipe 13 that is connected with the 3rd port Qc of above-mentioned cross valve 8 is connected with second filler valve 14 as the connecting portion of the flue 21 of off-premises station 1.The refrigerant pipe that is connected with the 4th port Qd of cross valve 8 is connected in the storage tank 15.
Becoming the refrigerant pipe 16 of U font is three piece in the place ahead of the storage tank 17a～17c of the suction portion that is located at the first compressor 3a～the 3rd compressor 3c by fork in above-mentioned storage tank 15 interior curve, and is connected with compressor 3a～3c respectively.
Especially, will in storage tank 15, bend to the U font, and be called the main refrigerant pipe that sucks along the first compressor 3a～extended refrigerant pipe 16 of the 3rd compressor 3c.To suck refrigerant pipe 16 refrigerant pipe 18a fork, that be connected with the storage tank 17a of the first compressor 3a from this master and be called the first suction refrigerant pipe.
Likewise; To be called the second suction refrigerant pipe from main refrigerant pipe 16 refrigerant pipe 18b fork, that be connected with the storage tank 17b of the second compressor 3b that suck, will be called the 3rd refrigerant pipe from main refrigerant pipe 16 refrigerant pipe 18c fork, that be connected with the storage tank 17c of the 3rd compressor 3c that suck.
Of the back, the cold-producing medium of deriving from storage tank 15 sucks refrigerant pipe 18c and is inhaled into the first compressor 3a～the 3rd compressor 3c via first suction refrigerant pipe 18a～3 respectively from the main refrigerant pipe 16 that sucks.Therefore, the first compressor 3a is positioned at upstream side, and then the second compressor 3b, the 3rd compressor 3c are according to the downstream that is set in sequence in of the second compressor 3b, the 3rd compressor 3c.
On above-mentioned first filler valve 12, be connected with the liquid line 20 that extends towards above-mentioned indoor set 2A～2D.Likewise, on above-mentioned second filler valve 14, be connected with the flue 21 that extends towards indoor set 2A～2D.
Aforesaid liquid pipe 20 portion is endways diverged and is many, and is connected with indoor heat converter 23a～23d in being arranged on each indoor set 2A～2D via expansion valve 24a～24d respectively.Above-mentioned gas pipe 21 also endways portion diverged and be many, and be connected with above-mentioned indoor heat converter 23a～23d in each indoor set 2A～2D.
Below just constituted the refrigeration cycle of air conditioner.
In addition; Relatively dispose outdoor fan 25 with the outdoor heat converter 9a, the 9b that are arranged in the off-premises station 1, and the outdoor control part that utilization is electrically connected with remote controller (not shown) comes the running of outdoor fan and the above-mentioned first compressor 3a～the 3rd compressor 3c etc. is controlled.
Off-premises station 1 is provided with inverter, and its voltage to commercial ac power source carries out rectification, is alternating voltage and output with the instruction corresponding frequencies of outdoor control part with the voltage transformation after the rectification.The above-mentioned first compressor 3a～the 3rd compressor 3c is the compressor of variable capacity type, and it is driven respectively through the output of inverter.
Relatively dispose indoor fan 26a～26d with the indoor heat converter 23a～23d that is arranged among each indoor set 2A～2D.Above-mentioned indoor fan 26a～26c is controlled and is driven through the above-mentioned remote controller running of operation.
In addition, off-premises station 1 is provided with oil equalizing circuit, will describe in detail below.
Specified altitude position on the side of the first compressor 3a is connected with the end of the first oil equalizing pipe 30a, and the other end of this oil equalizing pipe 30a is connected to long-pending oil pipe body 31.The first oil equalizing pipe 30a is provided with check valve 32a and capillary 33a, is provided with first temperature sensor 34 in the downstream of this capillary 33a.
Specified altitude position on the side of the second compressor 3b is connected with the end of the second oil equalizing pipe 30b, and the other end of this oil equalizing pipe 30b is connected to above-mentioned long-pending oil pipe body 31.The second oil equalizing pipe 30b is provided with check valve 32b and capillary 33b, is provided with second temperature sensor 35 in the downstream of this capillary 33b.
Specified altitude position on the side of the 3rd compressor 3c is connected with the end of the 3rd oil equalizing pipe 30c, and the other end of this oil equalizing pipe 30c is connected to above-mentioned long-pending oil pipe body 31.The 3rd oil equalizing pipe 30c is provided with check valve 32c and capillary 33c, is provided with three-temperature sensor 36 in the downstream of this capillary 33c.
Be connected with the bypass pipe 38 of refrigerant pipe 6 forks from the high-pressure side in an end of above-mentioned long-pending oil pipe body 31, this bypass pipe 38 is provided with capillary and the 4th temperature sensor 39.Be connected with equal oily guide pipe 40 and balance pipe 41 in the other end of long-pending oil pipe body 31.
Above-mentioned equal oily guide pipe 40 via first electromagnetic opening and closing valve 42 with after the inflow entrance of the distributor 43 stated be connected.Equal oily guide pipe 40 between the long-pending oil pipe body 31 and first electromagnetic opening and closing valve 42 is provided with the 5th temperature sensor 44.
On above-mentioned balance pipe 41, not only be provided with second electromagnetic opening and closing valve 46 and check valve 47, and be connected be located at off-premises station 1 end face balance pipe with filler valve 48.It is the balances for the oil mass that under the situation that a plurality of off-premises stations are connected in parallel, keeps being arranged on compressor and lubricating oil in each off-premises station with filler valve 48 that above-mentioned balance pipe is set.
Between the check valve 47 of above-mentioned balance pipe 41 and balance pipe are with filler valve 48, be connected with an end of auxiliary bypass pipe 49.The other end of auxiliary bypass pipe 49 is connected storage tank 15 and first and sucks the main refrigerant pipe 16 that sucks between the refrigerant pipe 18a, and way portion is connected with the shunt circuit of check valve 50a and the 4th electromagnetic opening and closing valve 50b therein.
On the other hand, be connected with the first oily delivery line 51 in the bottom of above-mentioned oil eliminator 7, be connected with the second oily delivery line 52 at the sidepiece of oil eliminator 7.
The above-mentioned first oily delivery line 51 is provided with capillary and the 3rd electromagnetic opening and closing valve 53, and this first oily delivery line 51 is connected to first electromagnetic opening and closing valve 42 of equal oily guide pipe 40 and the part between the distributor 43.On the second oily delivery line 52, capillary only is set, this second oily delivery line 52 is connected to the long-pending oil pipe body 31 of equal oily guide pipe 40 and the part between first electromagnetic opening and closing valve 42.
Above-mentioned distributor 43 is like the said device of installing with flat-hand position in back, on an end face, offers an inflow entrance, on another end face, offers three flow exports.In the inside of distributor 43, the stream that is connected with inflow entrance is three by fork, and each stream is communicated with above-mentioned flow export.
As shown in Figure 3, in the side view of distributor 43, first-class outlet Rf is positioned at upper left-hand, and the second flow export Rg is positioned at lower central, and the 3rd flow export Rh is positioned at upper right.In addition, the first-class outlet Rf and the second flow export Rh are positioned at roughly the same height.
On first-class outlet Rf, be connected with first oil return pipe 55, above-mentioned oil return pipe 55 is connected with the first suction refrigerant pipe 18a that diverges from main suction refrigerant pipe 16.On the second flow export Rg, be connected with second oil return pipe 56, above-mentioned oil return pipe 56 is connected with the second suction refrigerant pipe 18b that diverges from main suction refrigerant pipe 16.
On the 3rd flow export Rh, be connected with the 3rd oil return pipe 57, above-mentioned oil return pipe 57 is connected with the 3rd suction refrigerant pipe 18c that diverges from main suction refrigerant pipe 16.In addition, only with three compressor 3a～3c in second oil return pipe 56 that is connected of the second compressor 3b that is configured in the middle be provided with oil backflow stop valve 58 as electromagnetic opening and closing valve.
Below just constituted oil equalizing circuit.
Fig. 2 is the stereogram of the matched tube structure around the actual first compressor 3a～the 3rd compressor 3c of expression.
Right side at figure disposes the first compressor 3a, disposes the second compressor 3b in the middle, disposes the 3rd compressor 3c in the left side.Compressor 3a～3c is vertical compressor, gives prominence to being provided with discharging refrigerant pipe 4a～4c in the upper end, and is provided with storage tank 17a～17c along sidepiece separately.
The pipe that extends along the face that is provided with from the upper portion of the first compressor 3a is the main refrigerant pipe 16 that sucks that is connected with not shown here storage tank 15, and it is set to the position near the 3rd compressor 3c.The main position near the first compressor 3a that sucks refrigerant pipe 16 is provided with T type pipe 60, so that be connected with the first suction refrigerant pipe 18a.
First sucks refrigerant pipe 18a erects formation along the storage tank 17a that is connected with the first compressor 3a earlier, is bent to reverse U shape afterwards.Then, become the U font extending to the configuration plane rear curved, after being bent to reverse U shape once more above the storage tank 17a, be connected with the upper end of storage tank 17a.
Leading on the suction refrigerant pipe 16 of position near the second compressor 3b also is provided with T type pipe 61, connecting second here and sucking refrigerant pipe 18b.Second sucks refrigerant pipe 18b also with crooked with the identical mode of the above-mentioned first suction refrigerant pipe 18a, thereby is connected to along the upper end of the storage tank 17b of second compressor 3b setting.
Directly be connected with the 3rd at the above-mentioned main terminal part that sucks refrigerant pipe 16 and suck refrigerant pipe 19c.The 3rd sucks refrigerant pipe 18c also sucks refrigerant pipe 18a, the second suction refrigerant pipe 18b bending fully likewise with first.Then, be connected to along the upper end of the storage tank 17c of the 3rd compressor 3c setting.
On the other hand, in part that the main face that is provided with along each compressor 3a～3c that sucks refrigerant pipe 16 is provided with, promptly on the part of the main flat-hand position that sucks refrigerant pipe 16, above-mentioned distributor 43 is installed through pipe arrangement fixture 62.That is to say that distributor 43 begins to be flat-hand position from the position of installing along the main horizontal position that sucks refrigerant pipe 16.
The left side of distributor 43 in the drawings is connected with not shown from here long-pending oil pipe body 31 extended equal oily guide pipes 40.Extend three oil return pipes 55,56,57 of total from the right side of distributor 43, wherein, top is extended two, and the bottom is extended one.
A pipe of upper side extends along the main horizontal component that sucks refrigerant pipe 16 as first oil return pipe, 55 elder generations, sucks refrigerant pipe 18a along first then and erects formation, and be connected to the middle part of this first suction refrigerant pipe 18a.The pipe of lower side extends along the main horizontal component that sucks refrigerant pipe 16 earlier as second oil return pipe 56, sucks refrigerant pipe 18b along second then and erects formation.
Then, second oil return pipe 56 with second suck roughly the same height place, the position that is bent to reverse U shape of refrigerant pipe 18b by horizontal curvature, and be connected with above-mentioned oily backflow stop valve 58.In the drawings, only show the spool of oily oil return stop valve 58, and omitted electromagnetic coil portion.
Second oil return pipe 56 that stretches out from oil backflow stop valve 58 is fixed on the second suction refrigerant pipe 18b through pipe arrangement fixture 62, sucks refrigerant pipe 18b at lower portion place and second and is connected.Another pipe of distributor 43 upper side is bent to parallel with equal oily guide pipe 40 as the 3rd oil return pipe 57, and be connected to the 3rd suck refrigerant pipe 18c the part that erects.
Then, the mobile of the cold-producing medium in the refrigeration cycle described.
In case the first compressor 3a～the 3rd compressor 3c is driven, the gas refrigerant of the HTHP of discharging from each compressor 3a～3c will be directed to refrigerant pipe 6 via the discharging refrigerant pipe 4a～4c that is connected respectively with compressor 3a～3c.Then, gas refrigerant is supplied to oil eliminator 7 through refrigerant pipe 6, this to gas refrigerant in contained lubricating oil separate.
The gas refrigerant of from oil eliminator 7, discharging is directed to cross valve 8, and when cooling operation, be directed to outdoor heat converter 9a, 9b and carry out heat exchange with outdoor air.Gas refrigerant is condensed liquefaction and becomes liquid refrigerant, and is directed to each indoor set 2A～2D via outdoor expansion valve (10a, 10b), fluid box 11, first filler valve 12, liquid line 20 successively.
In indoor set 2A～2D, liquid refrigerant carries out flowing to indoor heat converter 23a～23d after the adiabatic expansion through expansion valve 24a～24d, and in each indoor heat converter 23a～23d, carries out evaporating after the heat exchange with room air.At this moment, cold-producing medium is captured evaporation latent heat from room air, and room air is become cold air.Under the effect of indoor fan 26a～26d, Quilt with air conditioning is blown out to indoor, plays refrigeration.
The vaporized refrigerant of deriving from above-mentioned indoor heat converter 23a～23d flows out indoor set 2A～2D, and is directed to off-premises station 1 via second filler valve 14.In off-premises station 1, vaporized refrigerant is being directed to the storage tank 15 promoting the circulation of qi liquid after separating of going forward side by side via cross valve 8, branches to first and sucks refrigerant pipe 18a～3rd and suck refrigerant pipe 18c from the main refrigerant pipe 16 that sucks.
Vaporized refrigerant sucks refrigerant pipe 18a～3rd suction cold-producing medium 18c from first and is inhaled into the first compressor 3a～the 3rd compressor 3c via storage tank 17a～17c.Cold-producing medium is compressed in each compressor 3a～3c and after becoming the gas refrigerant of HTHP, in above-mentioned path, circulates.
When heating running, cold-producing medium opposite direction towards with cooling operation the time is guided through switching cross valve 8.In indoor heat converter 23a～23d of each indoor set 2A～2D, cold-producing medium generation condensation and discharge condensation heat to room air.Room air is blown to indoor after becoming heating installation, to play the indoor effect that heats.
Then, to mobile describe of lubricating oil in oil equalizing circuit.
Each closed shell inner product at the first compressor 3a～the 3rd compressor 3c has lubricating oil, and the link position of first oil equalizing pipe 30a～30c that the fuel head of this lubricating oil is connected than the sidepiece with each first compressor 3a～the 3rd compressor 3c sometimes is higher.
The amount of lubricating oil of link position that surpasses the first oil equalizing pipe 30a～the 3rd oil equalizing pipe 30c is exported to the first oil equalizing pipe 30a～the 3rd oil equalizing pipe 30c as the surplus among the first compressor 3a～the 3rd compressor 3c.Then, lubricating oil is directed to long-pending oil pipe body 31 via capillary 33a～33c.
Gas refrigerant small quantity, that be in high pressure that refrigerant pipe 6 is branched to bypass pipe 38 from the high-pressure side flows into above-mentioned long-pending oil pipe body 31.The lubricating oil that flows into long-pending oil pipe body 31 is directed to equal oily guide pipe 40 from bypass pipe 38 under the effect through the capillary applied pressure.
First electromagnetic opening and closing valve 42 of being located at this equal oily guide pipe 40 is controlled as usually to be opened, so that the lubricating oil that flows out from long-pending oil pipe body 31 is directed to distributor 43.In distributor 45, lubricating oil is directed to the stream that separates towards three directions from inflow entrance, and flows out via the flow export of each stream.
That is, lubricating oil is branched in first oil return pipe 55～the 3rd oil return pipe 57 equably in distributor 43.Then, lubricating oil is directed to first from first oil return pipe 55～the 3rd oil return pipe 57 and sucks refrigerant pipe 18a～3rd suction refrigerant pipe 18c.Especially, the lubricating oil that is directed to second oil return pipe 56 circulates in being controlled as the oil backflow stop valve of opening 58.
The lubricating oil that flows into the first suction refrigerant pipe 18a～3rd suction refrigerant pipe 18c is with in kind of refrigeration cycle, circulating and from the vaporized refrigerant that storage tank 15 is derived, being inhaled into the first compressor 3a～the 3rd compressor 3c.
For example, the fuel head of the first compressor 3a is higher than the link position of the first oil equalizing pipe 30a, and the fuel head of the second compressor 3b is lower than the link position of the second oil equalizing pipe 30b, and the fuel head of the 3rd compressor 3c is the link position of the 3rd oil equalizing pipe 30c.That is, in each compressor 3a～3c, deviation can appear in each other pasta level sometimes.
At this moment, lubricating oil flows into the first oil equalizing pipe 30a that is connected with the first compressor 3a, and the gas refrigerant of high pressure flows into the second oil equalizing pipe 30b that is connected with the second compressor 3b.The lubricating oil of above-mentioned inflow oil equalizing pipe 30a, 30b and gas refrigerant converge in the long-pending oil pipe body 31, when flowing out from here, are admixture, and are directed to equal oily guide pipe 40.
Then, above-mentioned lubricating oil and gas refrigerant flow into distributor 43 from equal oily guide pipe 40, and are branched to three streams equably.Above-mentioned lubricating oil and gas refrigerant suck refrigerant pipe 18a～3rd from distributor 43 via first oil return pipe 55～the 3rd oil return pipe 57, first and suck refrigerant pipe 18c etc. and be directed to the first compressor 3a～the 3rd compressor 3c.
Like this, lubricating oil will from the compressor of the more side of the oil mass of lubricating oil for example the first compressor 3a towards the compressor of the less side of oil mass for example the second compressor 3b move.Therefore, can make the rapid balance of pasta level among the first compressor 3a～the 3rd compressor 3c.
On the other hand, the gas refrigerant of discharging, be mixed with a part that is accumulated in the lubricating oil in each compressor from the first compressor 3a～the 3rd compressor 3c.Above-mentioned fluid-mixing is discharged towards discharging refrigerant pipe 4a～4c, and refrigerant pipe 6 is directed to oil eliminator 7 from the high-pressure side.In this oil eliminator 7, lubricating oil is separated from gas refrigerant.
Be provided with the 3rd electromagnetic opening and closing valve 53 on the first oily delivery line 51 that is connected in bottom, but this electromagnetic opening and closing valve 53 is in closed condition usually with oil eliminator 7.Therefore, temporarily accumulate in the oil eliminator 7 at this separated lubricating oil, only gas refrigerant is directed to cross valve 8.
The lubricating oil that accumulates in the oil eliminator 7 increases, and finally rises to the link position place of the second oily delivery line 52 that is connected with the sidepiece of oil eliminator 7.The lubricating oil that surpasses the link position of above-mentioned oily delivery line 52 flows into equal oily guide pipe 40 from oily delivery line 52, and is back to the first compressor 3a～the 3rd compressor 3c as described above via distributor 43 and first oil return pipe 55～the 3rd oil return pipe 57.
Because of causing the pasta level in the closed shell of all compressor 3a～3c, some situation descends together sometimes.At this moment, the 3rd electromagnetic opening and closing valve 53 that on the first oily delivery line 51 of oil eliminator 7 bottoms, is provided with is sent opening signal, and first electromagnetic opening and closing valve 42 of equal oily guide pipe 40 is sent shutdown signal.
All lubricating oil that accumulated in the oil eliminator 7 are directed to equal oily guide pipe 40 from the first oily delivery line 51; And suck refrigerant pipe 18a～3rd and suck refrigerant pipe 18c etc. and be inhaled into the first compressor 3a～the 3rd compressor 3c via distributor 43, first oil return pipe 55～the 3rd oil return pipe 57, the main refrigerant pipe 16, first that sucks, to be dispensed to above-mentioned compressor 3a～3c equably.
In embodiments of the present invention, the distributor of oil return being used through pipe arrangement fixture 62 43 is mounted to the main horizontal component that sucks refrigerant pipe 16 that is connected with each compressor 3a～3c, and the distributor 43 that oil return is used is in flat-hand position.
That is, in above-mentioned distributor 43, distribute the secondary side pipe arrangement of side to suck refrigerant pipe 18a～the 3rd cold-producing medium suction refrigerant pipe 18c and be connected, thereby be arranged on very on the position near the first compressor 3a～the 3rd compressor 3c with first cold-producing medium.
Therefore, be accompanied by the driving of the first compressor 3a～the 3rd compressor 3c and the vibration that produces sucks refrigerant pipe 18a～the 3rd cold-producing medium via first cold-producing medium easily and sucks refrigerant pipe 18c and suck refrigerant pipe 16 and be passed to distributor 43 with main.
But,, it is in the same vibrational system, thereby can prevents the pipe arrangement fatigue damage through as described above distributor 43 being set to flat-hand position and it is mounted on main refrigerant suction line 16.
In addition, be set at distributor need expend time on the tilt correction of the distributor in manufacturing process under the situation of vertical position; And the size management to distributor and connecting pipings is also pretty troublesome; But in the present invention, because distributor 43 is set to flat-hand position it is mounted on the main refrigerant pipe 16 that sucks, therefore; Aforementioned tube science and engineering husband need not be expended, thereby product deviation, reduction manufacturing cost can be reduced.
In the off-premises station that comprises multiple compressors 1, there are operating compressor and the compressor that shuts down sometimes simultaneously.Under this operational situation, the ratio of the lubricating oil that refluxes via oil equalizing circuit sometimes can't be impartial.
For example, the first compressor 3a and second compressor 3b running, the 3rd compressor 3c shuts down.At this moment, the amount that is back to the lubricating oil of the first compressor 3a via first oil return pipe 55 from distributor 43 is identical with the amount that is back to the lubricating oil of the second compressor 3b via second oil return pipe 56.
Above-mentioned distributor 43 constitutes for an inflow entrance has three streams, and lubricating oil flows in each stream equably.Certainly, the lubricating oil of same amount also is directed to the 3rd oil return pipe 57 from distributor 45, and flows to the 3rd compressor 3c.
But as stated, the 3rd compressor 3c shuts down, and therefore, the lubricating oil that flows to the 3rd suction refrigerant pipe 18c from the 3rd oil return pipe 57 can not be inhaled into the 3rd compressor 3c.Above-mentioned lubricating oil has not just had the place to go, flows to the main refrigerant pipe 16 that sucks and suck refrigerant pipe 18c from the 3rd.
Then, under the effect of the attraction of the second compressor 3b that is positioned at upstream side, the overwhelming majority of the lubricating oil that in the 3rd oil return pipe 57, flows is directed to second and sucks refrigerant pipe 18b.At this, converge with the lubricating oil that imports via second oil return pipe 56, and be inhaled into the second compressor 3b.
Consequently, the first compressor 3a is 1:2 with the ratio that is back to the lubricants capacity of the second compressor 3b, and lubricating oil accumulates too much in the second compressor 3b, and in the first compressor 3a, is in the state of shortage of oil.
In the present invention, the second oil return pipe 3b is provided with oily backflow stop valve 58, under above-mentioned condition, to be controlled to be the oil stop valve 58 that refluxes is closed.Thus, lubricating oil is directed to first oil return pipe 55 and the 3rd oil return pipe 57 from distributor 43, but in second oil return pipe 56, lubricating oil does not flow.
Lubricating oil is back to the first compressor 3a from first oil return pipe 55, and lubricating oil is back to the second compressor 3b from the 3rd oil return pipe 57.Lubricating oil can not flow to this point of the 3rd compressor 3c that shuts down not to be changed.
That is, with three compressors in second oil return pipe 56 that is communicated with of the compressor 3b of middle on oily backflow stop valve 58 is set, under above-mentioned condition, be controlled to be and close.As shown in Figure 3, the first-class outlet Rf and the 3rd flow export Rh of distributor 43 are positioned at roughly the same height, and therefore, the lubricating oil that has roughly the same amount flows to first oil return pipe 55 and the 3rd oil return pipe 57.That is, the lubricating oil of same amount is back among the first compressor 3a and the second compressor 3b, thereby the too much or not enough situation of lubricating oil can not appear in the first compressor 3a and the second compressor 3b to each other.
In addition, even if certain compressor in the first compressor 3a～the 3rd compressor 3c temporarily occurs under the situation of shortage of oil state,, just can regulate the amount of the lubricating oil that compressor had in the running through controlling the switch of oily backflow stop valve 58.
For example, close oily backflow stop valve 58 during, the second compressor 3b state that can be absorbed in shortage of oil sometimes.Through to the comparison between the detected temperatures of the 4th temperature sensor 39 of being located at bypass pipe 38 and first temperature sensor, 35～the three-temperature sensors 37 of being located at the first oil equalizing pipe 30a～the 3rd oil equalizing pipe 30c, just can know the situation of shortage of oil.
When lubricating oil flowed in the first oil equalizing pipe 30a～the 3rd oil equalizing pipe 30c, their detected temperatures can be higher than the detected temperatures of bypass pipe 38.On the contrary, when cold-producing medium flowed in the first oil equalizing pipe 30a～the 3rd oil equalizing pipe 30c, the detected temperatures of bypass pipe 38 was higher than their detected temperatures, can know that then the first compressor 3a～the 3rd compressor 3c is absorbed in the situation of shortage of oil.
As stated, if close oily backflow stop valve 58 during detect the situation that the second compressor 3b is absorbed in shortage of oil, then the oil stop valve 58 that refluxes is controlled to be and opens.As shown in Figure 3, the second flow export Rg of distributor 43 is positioned at the foot side in three flow exports, and therefore, the lubricating oil that flows into the oil return pipe 56 that is connected with the second flow export Rg can be more than the lubricating oil that flows into oil return pipe 55,57.Therefore, the amount of returning the lubricating oil of the second compressor 3b from second oil return pipe 56 increases, and makes the amount balance of the lubricating oil that in the first compressor 3a and the second compressor 3b, contains.
In addition, the present invention is not limited to aforesaid embodiment itself, the implementation phase in can be in not breaking away from the scope of the present invention design inscape be out of shape and specializes.In addition, also can form various inventions through the disclosed multiple inscape of above-mentioned embodiment is carried out appropriate combination.
Utilizability in the industry
According to the present invention, can obtain the air conditioner that a kind of easily fixing and reliable, manufacture deviation with distributor reduces the effects such as pipe arrangement fatigue damage that also can prevent to be accompanied by the driving of compressor and produce.
Claims (2)
1. air conditioner, it constitutes kind of refrigeration cycle by the off-premises station that comprises a plurality of compressors that are connected in parallel and a plurality of indoor set, it is characterized in that having:
Oil equalizing pipe, this oil equalizing pipe will accumulate in and reach the above lubricating oil taking-up of ormal weight in each said compressor;
Distributor, this distributor is derived lubricating oil from said oil equalizing pipe, and is dispensed to a plurality of streams; And
Oil return pipe, this oil return pipe is communicated with the distribution stream of said distributor with the refrigerant suction pipe of each compressor, and makes lubricating oil be back to each compressor,
Said distributor is along the horizontal component of the refrigerant suction pipe of said compressor, and is mounted on said refrigerant suction pipe with flat-hand position.
2. air conditioner as claimed in claim 1 is characterized in that,
Said compressor parallel is provided with three,
The oil backflow stop valve of ability free switch is set on the above-mentioned oil return pipe that lubricating oil flows into the most easily.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2010030526 | 2010-02-15 | ||
| JP2010-030526 | 2010-02-15 | ||
| PCT/JP2011/053165 WO2011099628A1 (en) | 2010-02-15 | 2011-02-15 | Air conditioner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102753913A true CN102753913A (en) | 2012-10-24 |
| CN102753913B CN102753913B (en) | 2015-10-21 |
Family
ID=44367891
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201180009458.8A Active CN102753913B (en) | 2010-02-15 | 2011-02-15 | Air conditioner |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20120304685A1 (en) |
| EP (1) | EP2538155B1 (en) |
| JP (1) | JP5655014B2 (en) |
| CN (1) | CN102753913B (en) |
| WO (1) | WO2011099628A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105579787A (en) * | 2013-09-24 | 2016-05-11 | 三菱电机株式会社 | Refrigeration cycle device |
| WO2017036230A1 (en) * | 2015-09-01 | 2017-03-09 | 珠海格力电器股份有限公司 | Compressor module, multi-module unit and oil-balancing control method for multi-module unit |
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| WO2014046236A1 (en) | 2012-09-21 | 2014-03-27 | 東芝キヤリア株式会社 | Outdoor unit of multi-type air conditioning device |
| KR102165351B1 (en) * | 2014-02-05 | 2020-10-13 | 엘지전자 주식회사 | A heat-pump system and a method controlling the same |
| KR101622846B1 (en) * | 2014-10-27 | 2016-05-19 | 엘지전자 주식회사 | Oil separator and Air conditioner including the same |
| CN104990307B (en) * | 2015-08-05 | 2017-11-17 | 珠海格力电器股份有限公司 | Air conditioner, compression module and compression module group |
| US9939179B2 (en) * | 2015-12-08 | 2018-04-10 | Bitzer Kuehlmaschinenbau Gmbh | Cascading oil distribution system |
| US10969165B2 (en) | 2017-01-12 | 2021-04-06 | Emerson Climate Technologies, Inc. | Micro booster supermarket refrigeration architecture |
| JP7477431B2 (en) | 2020-11-18 | 2024-05-01 | 三菱重工サーマルシステムズ株式会社 | Refrigeration equipment |
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- 2011-02-15 WO PCT/JP2011/053165 patent/WO2011099628A1/en active Application Filing
- 2011-02-15 CN CN201180009458.8A patent/CN102753913B/en active Active
- 2011-02-15 EP EP11742367.3A patent/EP2538155B1/en active Active
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| CN1571908A (en) * | 2001-10-19 | 2005-01-26 | 东芝开利株式会社 | Refrigerating equipment |
| JP2006112668A (en) * | 2004-10-12 | 2006-04-27 | Fujitsu General Ltd | Outdoor unit for multi-chamber type air conditioner |
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| WO2017036230A1 (en) * | 2015-09-01 | 2017-03-09 | 珠海格力电器股份有限公司 | Compressor module, multi-module unit and oil-balancing control method for multi-module unit |
Also Published As
| Publication number | Publication date |
|---|---|
| EP2538155A4 (en) | 2018-04-04 |
| CN102753913B (en) | 2015-10-21 |
| JP5655014B2 (en) | 2015-01-14 |
| US20120304685A1 (en) | 2012-12-06 |
| JPWO2011099628A1 (en) | 2013-06-17 |
| EP2538155A1 (en) | 2012-12-26 |
| WO2011099628A1 (en) | 2011-08-18 |
| EP2538155B1 (en) | 2023-07-19 |
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