CN102753913B - Air conditioner - Google Patents
Air conditioner Download PDFInfo
- Publication number
- CN102753913B CN102753913B CN201180009458.8A CN201180009458A CN102753913B CN 102753913 B CN102753913 B CN 102753913B CN 201180009458 A CN201180009458 A CN 201180009458A CN 102753913 B CN102753913 B CN 102753913B
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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
A kind of air conditioner, it has: will accumulate in the oil equalizing pipe (30a ~ 30c) that lubricating oil that oily current divider (7) and each compressor (3a ~ 3c) reach more than ormal weight takes out, the distribution of lubrication oil that will derive from oil eliminator (7) and oil equalizing pipe (30a ~ 30c) is to the distributor (43) of multiple stream, and a point dispensing line for distributor (43) is sucked refrigerant pipe (18a ~ 18c) with the cold-producing medium of each compressor (3a ~ 3c) be communicated with, and make lubricating oil be back to the oil return pipe (55 ~ 57) of each compressor (3a ~ 3c), distributor (43) is along the horizontal component of the refrigerant suction pipe (16) of compressor (3a ~ 3c), and be mounted on refrigerant suction pipe (16) with flat-hand position, by like this, can easily and reliably distributor (43) is fixed, manufacture deviation can be reduced, and the piping stress produced along with the driving of compressor (3a ~ 3c) can be avoided to concentrate, to prevent pipe arrangement fatigue damage.
Description
Technical field
The present invention relates to a kind of by there is the off-premises station of multiple compressors and multiple indoor set to form the air conditioner of kind of refrigeration cycle, particularly for lubricating oil being accumulated in equably the improvement of the oil-returning structure in each compressor.
Background technology
A kind of being adapted at most is had to have the air conditioner used in the building of multiple air conditioning area.Comprise oil return circuit at this air conditioner, this oil return circuit is formed as reaching lodge in each compressor at the lubricating oil of more than ormal weight respectively via oil equalizing pipe taking-up, and taken out lubricating oil is transferred to the compressor of lubricating oil deficiency.
In addition, due to the oil component containing lubricating oil in the gas refrigerant of the HTHP of discharging from each compressor, and there is multiple compressors, therefore, the amount of the lubricating oil of discharging also can not be ignored.Therefore, in kind of refrigeration cycle, be provided with oil eliminator, to be separated by the oil component of lubricating oil contained in Exhaust Gas.Separated lubricating oil family is also back to each compressor via oil return circuit.
Can problem be make lubricating oil be back to each compressor equably, and do not occur too much or not enough situation.In order to avoid the imbalance of oil mass, can consider to arrange electromagnetic switching valve in oil return circuit, but this can impact cost.If install capillary to detect for the purpose of pasta in oil return circuit, then cannot correspond to running capacity change and the operating number change of compressor, cause recirculating oil quantity to occur difference.
Such as, as be connected with three compressors, to returning of distributing of lubricating oil with bifurcated pipe, disclose and use the branched portion that can carry out tripartite's distribution to replace the example (such as Japanese Patent Laid-Open 2006-112668 publication) of T-shaped pipe.
Specifically, above-mentioned branched portion is by having the filter screen portion of inflow entrance of lubricating oil, connecting section that one end is connected with the flow export in this filter screen portion and the distributor that is connected with the other end of this connecting section is formed.The end of above-mentioned distributor is provided with multiple outflow stream, and it is communicated with flow export respectively.
Summary of the invention
In order to avoid pipe arrangement fatigue damage, the distributor for refrigerant branches is normally arranged across certain distance with vibration sources such as compressors.But, be connected to for the secondary side pipe arrangement of the distributor of oil return the refrigerant suction pipe be communicated with the sucting of compressor by storage tank.
Therefore, very on the position of compressor, be provided with distributor, the vibration produced along with the driving of compressor can be passed to distributor from secondary side pipe arrangement, easily causes pipe arrangement fatigue damage.And the current divider disclosed in above-mentioned document to be mounted to inflow entrance towards bottom, flow export towards top in substantially vertical posture, with make lubricating oil under flow upward.
If branched portion is obliquely installed, then the lubricating oil in pipe arrangement can be amesiality, and when branched portion is shunted, lubricating oil will be shunted under amesiality state.Be set to vertical position for the foregoing reasons and by branched portion although describe, this is the structure that the vibration easily making to transmit from compressor expands, and thus can aggravate pipe arrangement fatigue rupture further.
The present invention completes based on above-mentioned situation, its object is to provide a kind of air conditioner, it comprises multiple compressor, can easily and reliably to for making oil return each compressor equably and the distributor that arranges is fixed, manufacture deviation can be reduced, and the piping stress produced along with the driving of compressor can be avoided to concentrate, to realize preventing pipe arrangement fatigue damage.
For meeting above-mentioned purpose, air conditioner of the present invention is
By comprising the off-premises station of the multiple compressors be connected in parallel and multiple indoor set to form kind of refrigeration cycle, have: oil equalizing pipe, this oil equalizing pipe will accumulate in the lubricating oil reaching more than ormal weight in each compressor and take out; Distributor, lubricating oil is derived by this distributor from above-mentioned oil equalizing pipe, and is dispensed to multiple stream; And oil return pipe, a point dispensing line for above-mentioned distributor is communicated with the refrigerant suction pipe of each compressor by this oil return pipe, and make lubricating oil be back to each compressor, above-mentioned distributor along the horizontal component of the refrigerant suction pipe of compressor, and is mounted on refrigerant suction pipe with flat-hand position.
Accompanying drawing explanation
Fig. 1 is the refrigeration cycle structure figure of the air conditioner of an embodiment of the present invention.
Fig. 2 is the stereogram of the oil-returning structure to compressor oil return representing above-mentioned embodiment.
Fig. 3 is the side view of the structure of the distributor representing above-mentioned embodiment.
Detailed description of the invention
Below, based on accompanying drawing, embodiments of the present invention are described.
Fig. 1 is the refrigeration cycle structure figure of air conditioner.
Above-mentioned air conditioner is made up of the indoor set 2A ~ 2D of an off-premises station 1 and multiple stage (in this case four).
Multiple compressors is provided with, i.e. the first compressor 3a, the second compressor 3b and the 3rd compressor 3c in above-mentioned off-premises station 1.The discharging refrigerant pipe 4a ~ 4c be connected with each compressor 3a ~ 3c is provided with check valve 5a ~ 5c, and discharging refrigerant pipe converges at a refrigerant pipe 6.In other words, the first compressor 3a ~ the first compressor 3c is connected in parallel in refrigerant pipe 6.
This refrigerant pipe 6 is connected with oil eliminator 7, the first port Qa of cross valve 8 and the second port Qb, two outdoor heat converter 9a, 9b being connected in parallel, two outdoor expansion valve 10a, 10b being connected in parallel, fluid box 11, first filler valve 12, wherein, above-mentioned oil eliminator 7 has the function be separated by lubricating oil family contained in gas refrigerant, and above-mentioned first filler valve 12 is connecting portions of the liquid line 20 of off-premises station 1.The refrigerant pipe 13 be connected with the 3rd port Qc of above-mentioned cross valve 8 is connected with the second filler valve 14 of the connecting portion of the flue 21 as off-premises station 1.The refrigerant pipe be connected with the 4th port Qd of cross valve 8 is connected in storage tank 15.
Become the refrigerant pipe 16 of U-shaped to be three in the front of storage tank 17a ~ 17c of sucting being located at the first compressor 3a ~ the 3rd compressor 3c by fork in above-mentioned storage tank 15 interior curve, and be connected with compressor 3a ~ 3c respectively.
Especially, U-shaped will be bent in storage tank 15 and be called main suction refrigerant pipe along the refrigerant pipe 16 that the first compressor 3a ~ the 3rd compressor 3c extends.By diverge from this main suction refrigerant pipe 16, the refrigerant pipe 18a that is connected with the storage tank 17a of the first compressor 3a is called the first suction refrigerant pipe.
Similarly, by diverge from main suction refrigerant pipe 16, the refrigerant pipe 18b that is connected with the storage tank 17b of the second compressor 3b is called the second suction refrigerant pipe, by diverge from main suction refrigerant pipe 16, the refrigerant pipe 18c that is connected with the storage tank 17c of the 3rd compressor 3c is called the 3rd refrigerant pipe.
As described later, the cold-producing medium of deriving from storage tank 15 sucks refrigerant pipe 18a ~ three suction refrigerant pipe 18c via first respectively from main suction refrigerant pipe 16 and is inhaled into the first compressor 3a ~ the 3rd compressor 3c.Therefore, the first compressor 3a is positioned at side, most upstream, then the second compressor 3b, the 3rd compressor 3c according to the second compressor 3b, the 3rd compressor 3c be set in sequence in downstream.
Above-mentioned first filler valve 12 is connected with the liquid line 20 extended towards above-mentioned indoor set 2A ~ 2D.Similarly, above-mentioned second filler valve 14 is connected with the flue 21 extended towards indoor set 2A ~ 2D.
Aforesaid liquid pipe 20 is diverged as many at terminal part, and is connected with the indoor heat converter 23a ~ 23d be arranged in each indoor set 2A ~ 2D via expansion valve 24a ~ 24d respectively.Above-mentioned gas pipe 21 is also diverged as many at terminal part, and is connected with the above-mentioned indoor heat converter 23a ~ 23d in each indoor set 2A ~ 2D.
Below the refrigeration cycle of air conditioner is just constituted.
In addition, relatively be configured with outdoor fan 25 with outdoor heat converter 9a, 9b in machine 1 disposed in the outdoor, and utilize the running of outdoor control part to outdoor fan and above-mentioned first compressor 3a ~ the 3rd compressor 3c etc. be electrically connected with remote controller (not shown) to control.
Off-premises station 1 is provided with inverter, and it carries out rectification to the voltage of commercial ac power source, is with the alternating voltage of the instruction corresponding frequencies of outdoor control part and exports the voltage transformation after rectification.Above-mentioned first compressor 3a ~ the 3rd compressor 3c is the compressor of variable capacity type, and it is driven separately by the output of inverter.
Indoor fan 26a ~ 26d is relatively configured with the indoor heat converter 23a ~ 23d be arranged in each indoor set 2A ~ 2D.Above-mentioned indoor fan 26a ~ 26c is controlled by the above-mentioned remote controller running of operation and is driven.
In addition, off-premises station 1 is provided with oil equalizing circuit, will be described in detail below.
Specified altitude position on the housing side of the first compressor 3a is connected with one 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.First oil equalizing pipe 30a is provided with check valve 32a and capillary 33a, the downstream of this capillary 33a is provided with the first temperature sensor 34.
Specified altitude position on the housing side of the second compressor 3b is connected with one 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.Second oil equalizing pipe 30b is provided with check valve 32b and capillary 33b, the downstream of this capillary 33b is provided with the second temperature sensor 35.
Specified altitude position on the housing side of the 3rd compressor 3c is connected with one 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 31.3rd oil equalizing pipe 30c is provided with check valve 32c and capillary 33c, the downstream of this capillary 33c is provided with three-temperature sensor 36.
Be connected with the bypass pipe 38 diverged from high-pressure side refrigerant pipe 6 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.Equal oily guide pipe 40 and balance pipe 41 is connected with in the other end of long-pending oil pipe body 31.
Above-mentioned equal oily guide pipe 40 is connected with the inflow entrance of distributor 43 described later via the first electromagnetic opening and closing valve 42.Equal oily guide pipe 40 between long-pending oil pipe body 31 and the first electromagnetic opening and closing valve 42 is provided with the 5th temperature sensor 44.
On above-mentioned balance pipe 41, be not only provided with the second electromagnetic opening and closing valve 46 and check valve 47, and be connected with the balance pipe filler valve 48 being located at off-premises station 1 end face.The balance that above-mentioned balance pipe filler valve 48 is the oil masses in order to keep compressor and the lubricating oil be arranged in each off-premises station when being connected in parallel by multiple off-premises station is set.
An end of auxiliary bypass pipe 49 is connected with between the check valve 47 and balance pipe filler valve 48 of above-mentioned balance pipe 41.The other end of auxiliary bypass pipe 49 is connected storage tank 15 and first and sucks main suction refrigerant pipe 16 between 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 wherein.
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.
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 the part between the first electromagnetic opening and closing valve 42 of equal oily guide pipe 40 and distributor 43.Second oily delivery line 52 only arranges capillary, and this second oily delivery line 52 is connected to the part between the long-pending oil pipe body 31 of equal oily guide pipe 40 and the first electromagnetic opening and closing valve 42.
Above-mentioned distributor 43 is as described later with the device that flat-hand position is installed, and offers an inflow entrance on one face, another end face offers three flow exports.In the inside of distributor 43, the stream be 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 second outlet Rg is positioned at lower central, and the 3rd flow export Rh is positioned at upper right.In addition, first-class outlet Rf and second export Rh and are positioned at roughly the same height.
First-class outlet Rf is connected with the first oil return pipe 55, and above-mentioned oil return pipe 55 and diverge from main suction refrigerant pipe 16 first sucks refrigerant pipe 18a and is connected.Second outlet Rg is connected with the second oil return pipe 56, and above-mentioned oil return pipe 56 and diverge from main suction refrigerant pipe 16 second sucks refrigerant pipe 18b and is connected.
3rd flow export Rh is connected with the 3rd oil return pipe 57, and above-mentioned oil return pipe 57 and the diverge from main suction refrigerant pipe 16 the 3rd sucks refrigerant pipe 18c and is connected.In addition, on the second oil return pipe 56 be connected with the second compressor 3b being configured in middle in three compressor 3a ~ 3c, be only provided with the oily backflow non-return valve 58 as electromagnetic opening and closing valve.
Below just oil equalizing circuit is constituted.
Fig. 2 is the stereogram of the matched tube structure represented around actual the first compressor 3a ~ the 3rd compressor 3c.
Be configured with the first compressor 3a in the right side of figure, be configured with the second compressor 3b in middle, be configured with the 3rd compressor 3c in left side.Compressor 3a ~ 3c is vertical compressor, and projecting in upper end have discharging refrigerant pipe 4a ~ 4c, and respective sidepiece is provided with storage tank 17a ~ 17c.
Be the main suction refrigerant pipe 16 be connected with storage tank 15 not shown herein from the upper portion of the first compressor 3a along the pipe that installation surface extends, it is set to the position near the 3rd compressor 3c.On the position of the first compressor 3a, T-shaped pipe 60 is provided with, to suck refrigerant pipe 18a be connected with first at main suction refrigerant pipe 16.
First sucks refrigerant pipe 18a first erects formation along the storage tank 17a be connected with the first compressor 3a, is bent to reverse U shape afterwards.Then, after extending to configuration plane, bend to U-shaped, be again bent to reverse U shape above storage tank 17a after, be connected with the upper end of storage tank 17a.
The main suction refrigerant pipe 16 at the position near the second compressor 3b is also provided with T-shaped pipe 61, is connected to the second suction refrigerant pipe 18b herein.Second sucks refrigerant pipe 18b also to suck the identical mode of refrigerant pipe 18a bend with above-mentioned first, thus is connected to the upper end of the storage tank 17b along the second compressor 3b setting.
Directly be connected with the 3rd at the terminal part of above-mentioned main suction refrigerant pipe 16 and suck refrigerant pipe 19c.3rd suck refrigerant pipe 18c also suck with first refrigerant pipe 18a, second suck refrigerant pipe 18b completely in the same manner as bend.Then, the upper end of the storage tank 17c arranged along the 3rd compressor 3c is connected to.
On the other hand, in a part for the part, the i.e. flat-hand position of main suction refrigerant pipe 16 that arrange in the installation surface along each compressor 3a ~ 3c of main suction refrigerant pipe 16, by pipe arrangement fixture 62, above-mentioned distributor 43 is installed.That is, distributor 43 is flat-hand position from the position that the horizontal position along main suction refrigerant pipe 16 is installed.
The left side of distributor 43 is in the drawings connected with the equal oily guide pipe 40 that long-pending oil pipe body 31 not shown from here extends.Extend total three oil return pipes 55,56,57 from the right side of distributor 43, wherein, top extends two, and bottom extends one.
A pipe of upper side first extends along the horizontal component of main suction refrigerant pipe 16 as the first oil return pipe 55, then sucks refrigerant pipe 18a along first and erects formation, and is connected to the middle part of this first suction refrigerant pipe 18a.The pipe of lower side first extends along the horizontal component of main suction refrigerant pipe 16 as the second oil return pipe 56, then sucks refrigerant pipe 18b along second and erects formation.
Then, the second oil return pipe 56 is sucking the roughly the same At The Height in the position being bent to reverse U shape of refrigerant pipe 18b by horizontal curvature with second, and is connected with above-mentioned oily backflow non-return valve 58.In the drawings, illustrate only the spool of oily oil return stop valve 58, and eliminate electromagnetic coil portion.
The second oil return pipe 56 stretched out from oily backflow non-return valve 58 is fixed on the second suction refrigerant pipe 18b by pipe arrangement fixture 62, sucks refrigerant pipe 18b be connected at lower portion place and second.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 erect part.
Then, the flowing of the cold-producing medium in refrigeration cycle is described.
Once drive the first compressor 3a ~ the 3rd compressor 3c, 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 be connected respectively with compressor 3a ~ 3c.Then, gas refrigerant is supplied to oil eliminator 7 by refrigerant pipe 6, and lubricating oil contained in this is to gas refrigerant is separated.
The gas refrigerant of discharging from oil eliminator 7 is directed to cross valve 8, and is directed to outdoor heat converter 9a, 9b when cooling operation and carries out heat exchange with outdoor air.Gas refrigerant is condensed liquefaction and become liquid refrigerant, and successively via outdoor expansion valve (10a, 10b), fluid box 11, first filler valve 12, liquid line 20 and be directed to each indoor set 2A ~ 2D.
In indoor set 2A ~ 2D, liquid refrigerant flows to indoor heat converter 23a ~ 23d after carrying out adiabatic expansion by expansion valve 24a ~ 24d, and evaporates carry out heat exchange with room air in each indoor heat converter 23a ~ 23d after.Now, cold-producing medium captures evaporation latent heat in air indoor, 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 the second filler valve 14.In off-premises station 1, vaporized refrigerant, after being directed to storage tank 15 via cross valve 8 and carry out gas-liquid separation, branching to the first suction refrigerant pipe 18a ~ three from main suction refrigerant pipe 16 and sucks refrigerant pipe 18c.
Vaporized refrigerant sucks refrigerant pipe 18a ~ three 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 circulates become the gas refrigerant of HTHP by compressing in each compressor 3a ~ 3c after in above-mentioned path.
When heating running, by switching cross valve 8, cold-producing medium is guided towards the direction contrary with during cooling operation.In the indoor heat converter 23a ~ 23d of each indoor set 2A ~ 2D, cold-producing medium generation condensation and to room air release condensation heat.Room air is blown to indoor after becoming heating installation, indoor heats effect to play.
Then, the flowing of lubricating oil in oil equalizing circuit is described.
In each closed shell of the first compressor 3a ~ the 3rd compressor 3c, contain lubricating oil, the fuel head of this lubricating oil is sometimes higher than the link position of the first oil equalizing pipe 30a ~ 30c be connected with the sidepiece of each first compressor 3a ~ the 3rd compressor 3c.
More than the amount of the lubricating oil of the link position of the first oil equalizing pipe 30a ~ the 3rd oil equalizing pipe 30c as the surplus in the first compressor 3a ~ the 3rd compressor 3c, be exported to the first oil equalizing pipe 30a ~ the 3rd oil equalizing pipe 30c.Then, lubricating oil is directed to long-pending oil pipe body 31 via capillary 33a ~ 33c.
From high-pressure side refrigerant pipe 6 by branch to the small quantity of bypass pipe 38, the gas refrigerant that is in high pressure flows into above-mentioned long-pending oil pipe body 31.The lubricating oil flowing into long-pending oil pipe body 31 is directed to equal oily guide pipe 40 from bypass pipe 38 under the effect by capillary applied pressure.
The first electromagnetic opening and closing valve 42 being located at this equal oily guide pipe 40 is controlled as usually to be opened, and is directed to distributor 43 to make the lubricating oil flowed out from long-pending oil pipe body 31.In distributor 45, lubricating oil is directed to the stream be separated towards three directions from inflow entrance, and flows out via the flow export of each stream.
That is, in distributor 43, lubricating oil is branched in the first oil return pipe the 55 ~ three oil return pipe 57 equably.Then, lubricating oil is directed to the first suction refrigerant pipe 18a ~ three from the first oil return pipe the 55 ~ three oil return pipe 57 and sucks refrigerant pipe 18c.Especially, the lubricating oil being directed to the second oil return pipe 56 is being controlled as circulation in the oily backflow non-return valve 58 opened.
Flow into first to suck lubricating oil that refrigerant pipe 18a ~ three suck refrigerant pipe 18c and circulate with in kind of refrigeration cycle and together with the vaporized refrigerant of deriving from storage tank 15, be inhaled into the first compressor 3a ~ the 3rd compressor 3c.
Such as, the fuel head of the first compressor 3a sets high than the connection bit of the first oil equalizing pipe 30a, and the fuel head of the second compressor 3b sets low than the connection bit 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, oil level each other there will be deviation sometimes.
Now, lubricating oil flows into the first oil equalizing pipe 30a be connected with the first compressor 3a, and the gas refrigerant of high pressure flows into the second oil equalizing pipe 30b be connected with the second compressor 3b.Lubricating oil and the gas refrigerant of above-mentioned inflow oil equalizing pipe 30a, 30b converge in long-pending oil pipe body 31, be admixture, and be directed to equal oily guide pipe 40 when flowing out from here.
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 ~ three from distributor 43 via the first oil return pipe the 55 ~ three 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 move by compressor such as the second compressor 3b from the compressor of the more side of the oil mass of lubricating oil such as the first compressor 3a towards the less side of oil mass.Therefore, the oil level rapid equalisation in the first compressor 3a ~ the 3rd compressor 3c can be made.
On the other hand, in the gas refrigerant of discharging from the first compressor 3a ~ the 3rd compressor 3c, be mixed with by a part for the lubricating oil accumulated in each compressor.Above-mentioned fluid-mixing is discharged towards discharging refrigerant pipe 4a ~ 4c, and is directed to oil eliminator 7 from high-pressure side refrigerant pipe 6.In this oil eliminator 7, lubricating oil is separated by from gas refrigerant.
Be connected with the bottom of oil eliminator 7 first oily delivery line 51 is provided with the 3rd electromagnetic opening and closing valve 53, but this electromagnetic opening and closing valve 53 is in closed condition usually.Therefore, temporarily accumulate in oil eliminator 7 at this separated lubricating oil, only gas refrigerant is directed to cross valve 8.
The lubricating oil accumulated in oil eliminator 7 increases, and finally rises to the link position place of the second oily delivery line 52 be connected with the sidepiece of oil eliminator 7.The lubricating oil exceeding 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 the first oil return pipe the 55 ~ three oil return pipe 57.
The oil level in the closed shell of all compressor 3a ~ 3c is caused to decline together because of some situation sometimes.Now, opening signal is sent to the 3rd electromagnetic opening and closing valve 53 that the oily delivery line 51 of first bottom oil eliminator 7 is arranged, and shutdown signal is sent to the first electromagnetic opening and closing valve 42 of equal oily guide pipe 40.
Equal oily guide pipe 40 is directed to from the first oily delivery line 51 by all lubricating oil accumulated in oil eliminator 7, and be inhaled into the first compressor 3a ~ the 3rd compressor 3c, to be dispensed to above-mentioned compressor 3a ~ 3c equably via distributor 43, first oil return pipe the 55 ~ three oil return pipe 57, main suction refrigerant pipe 16, first suction refrigerant pipe 18a ~ three suction refrigerant pipe 18c etc.
In embodiments of the present invention, by pipe arrangement fixture 62 by oil return with distributor 43 be mounted to the horizontal component of the main suction refrigerant pipe 16 be connected with each compressor 3a ~ 3c, and make the distributor 43 of oil return be in flat-hand position.
That is, in above-mentioned distributor 43, distribute the secondary side pipe arrangement of side and the first cold-producing medium and suck refrigerant pipe 18a ~ the 3rd cold-producing medium and suck refrigerant pipe 18c and be connected, thus be arranged on very on the position of the first compressor 3a ~ the 3rd compressor 3c.
Therefore, the vibration produced along with the driving of the first compressor 3a ~ the 3rd compressor 3c is easily passed to distributor 43 via first cold-producing medium suction refrigerant pipe 18a ~ the 3rd cold-producing medium suction refrigerant pipe 18c and main suction refrigerant pipe 16.
But, as described above distributor 43 be set to flat-hand position and be mounted on main refrigerant suction line 16, it just can be made to be in same vibrational system, thus pipe arrangement fatigue damage can be prevented.
In addition, when distributor is set to vertical position, the tilt correction of the distributor in manufacturing process needs to expend time, and it is also pretty troublesome to the size management of distributor and connecting pipings, but in the present invention, be mounted on main suction refrigerant pipe 16 owing to distributor 43 to be set to flat-hand position, therefore, above-mentioned management time need not expended, thus product deviation can be reduced, cutting down manufacturing cost.
In the off-premises station 1 comprising multiple compressors, the compressor that sometimes there is operating compressor simultaneously He shut down.Under this operational situation, the ratio sometimes via the lubricating oil of oil equalizing circuit backflow cannot be impartial.
Such as, the first compressor 3a and the second compressor 3b operates, and the 3rd compressor 3c shuts down.Now, the amount being back to the lubricating oil of the first compressor 3a from distributor 43 via the first oil return pipe 55 is identical with the amount of the lubricating oil being back to the second compressor 3b via the second oil return pipe 56.
Above-mentioned distributor 43 is configured to have three streams for an inflow entrance, and lubricating oil flows equably in each stream.Certainly, the lubricating oil of identical amount is also directed to the 3rd oil return pipe 57 from distributor 45, and flows to the 3rd compressor 3c.
But as mentioned above, the 3rd compressor 3c shuts down, therefore, flow to the 3rd lubricating oil sucking refrigerant pipe 18c from the 3rd oil return pipe 57 and can not be inhaled into the 3rd compressor 3c.Above-mentioned lubricating oil just without place to go, and flows to main suction refrigerant pipe 16 from the 3rd suction refrigerant pipe 18c.
Then, be positioned at upstream side the second compressor 3b attraction effect under, in the 3rd oil return pipe 57, the overwhelming majority of lubricating oil of flowing is directed to the second suction refrigerant pipe 18b.At this, converge with the lubricating oil imported via the second oil return pipe 56, and be inhaled into the second compressor 3b.
Consequently, the first compressor 3a is 1:2 with the ratio of the lubricants capacity being back to the second compressor 3b, and in the second compressor 3b, lubricating oil accumulates too much, and in the first compressor 3a, be in the state of shortage of oil.
In the present invention, the second oil return pipe 3b is provided with oily backflow non-return valve 58, to control under the above conditions as being closed by oily backflow non-return valve 58.Thus, lubricating oil is directed to the first oil return pipe 55 and the 3rd oil return pipe 57 from distributor 43, but in the second oil return pipe 56, lubricating oil does not flow.
Lubricating oil is back to the first compressor 3a from the 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 not change shut down.
That is, the second oil return pipe 56 be communicated with the compressor 3b of the middle in three compressors arranging oily backflow non-return valve 58, controlling under the above conditions as closing.As shown in Figure 3, the first-class outlet Rf of distributor 43 is positioned at roughly the same height with the 3rd flow export Rh, and therefore, the lubricating oil having roughly the same amount flows to the first oil return pipe 55 and the 3rd oil return pipe 57.That is, the oil return of identical amount is in the first compressor 3a and the second compressor 3b, and thus the first compressor 3a and the second compressor 3b there will not be the situation that lubricating oil is too much or not enough to each other.
In addition, even if shortage of oil state temporarily appears in certain compressor in the first compressor 3a ~ the 3rd compressor 3c, by controlling the switch of oily backflow non-return valve 58, the amount of the lubricating oil that just can have the compressor in running regulates.
Such as, during the oily backflow non-return valve 58 of closedown, the second compressor 3b can be absorbed in the state of shortage of oil sometimes.By to the 4th temperature sensor 39 being located at bypass pipe 38 be located at the first oil equalizing pipe 30a ~ the 3rd oil equalizing pipe 30c the first temperature sensor 35 ~ the three-temperature sensor 37 detected temperatures between compare, just can know the situation of shortage of oil.
When lubricating oil flows 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 flows in the first oil equalizing pipe 30a ~ the 3rd oil equalizing pipe 30c, the detected temperatures of bypass pipe 38 is higher than their detected temperatures, then known first compressor 3a ~ the 3rd compressor 3c is absorbed in the situation of shortage of oil.
As mentioned above, if detect that the second compressor 3b is absorbed in the situation of shortage of oil during the oily backflow non-return valve 58 of closedown, then oily backflow non-return valve 58 is controlled as opening.As shown in Figure 3, the second outlet Rg of distributor 43 is positioned at foot side in three flow exports, and therefore, flowing into the lubricating oil exporting the oil return pipe 56 that Rg is connected with second can be more than the lubricating oil flowing into oil return pipe 55,57.Therefore, the amount returning the lubricating oil of the second compressor 3b from the second oil return pipe 56 increases, and the amount of the lubricating oil contained in the first compressor 3a and the second compressor 3b is balanced.
In addition, the present invention is not limited to embodiment as above itself, implementation phase in can not depart from the present invention design scope in carry out distortion to specialize to inscape.In addition, also by carrying out the multiple inscape disclosed in above-mentioned embodiment appropriately combinedly forming various invention.
Industrial utilizability
According to the present invention, can obtain a kind of there is distributor fixing easily and reliable, manufacture deviation reduce and the air conditioner of the effects such as the pipe arrangement fatigue damage produced along with the driving of compressor can be prevented.
Claims (2)
1. an air conditioner, it, by comprising the off-premises station of the multiple compressors be connected in parallel and multiple indoor set to form kind of refrigeration cycle, is characterized in that having:
Oil equalizing pipe, this oil equalizing pipe takes out accumulating in compressor described in each lubricating oil reaching more than ormal weight;
Distributor, lubricating oil is derived by this distributor from described oil equalizing pipe, and is dispensed to multiple stream; And
Oil return pipe, a point dispensing line for described distributor is communicated with the refrigerant suction pipe of each compressor by this oil return pipe, and makes lubricating oil be back to each compressor,
Described distributor is mounted on the horizontal component of main suction refrigerant pipe with flat-hand position, and the cold-producing medium of deriving from storage tank is guided to the refrigerant suction pipe of described each compressor by described main suction refrigerant pipe.
2. air conditioner as claimed in claim 1, is characterized in that,
Described compressor parallel is provided with three,
The above-mentioned oil return pipe that lubricating oil the most easily flows into arranges the oily backflow non-return valve of energy free switch.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2010-030526 | 2010-02-15 | ||
| JP2010030526 | 2010-02-15 | ||
| PCT/JP2011/053165 WO2011099628A1 (en) | 2010-02-15 | 2011-02-15 | Air conditioner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102753913A CN102753913A (en) | 2012-10-24 |
| CN102753913B true 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) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9683751B2 (en) | 2012-09-21 | 2017-06-20 | Toshiba Carrier Corporation | Outdoor unit for multi-type air conditioner |
| CN105579787B (en) * | 2013-09-24 | 2018-01-05 | 三菱电机株式会社 | Freezing cycle 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 |
| CN105180493B (en) * | 2015-09-01 | 2019-12-24 | 珠海格力电器股份有限公司 | Compressor module, multi-module unit and oil balancing control method of multi-module unit |
| US9939179B2 (en) * | 2015-12-08 | 2018-04-10 | Bitzer Kuehlmaschinenbau Gmbh | Cascading oil distribution system |
| US10634424B2 (en) * | 2017-01-12 | 2020-04-28 | Emerson Climate Technologies, Inc. | Oil management for micro booster supermarket refrigeration system |
| 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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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1571908A (en) * | 2001-10-19 | 2005-01-26 | 东芝开利株式会社 | Refrigerating equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US3581519A (en) * | 1969-07-18 | 1971-06-01 | Emhart Corp | Oil equalization system |
| JPH07234039A (en) * | 1994-02-25 | 1995-09-05 | Hitachi Ltd | Air conditioner |
| JPH085169A (en) * | 1994-06-21 | 1996-01-12 | Matsushita Refrig Co Ltd | Air conditioner |
| JP3223268B2 (en) * | 1998-08-20 | 2001-10-29 | ダイキン工業株式会社 | Refrigerant distribution mechanism and heat exchanger provided with refrigerant distribution mechanism |
| JP2000274885A (en) * | 1999-03-25 | 2000-10-06 | Sharp Corp | Branch tube and air conditioner having branch tube |
| ES2382736T3 (en) * | 2003-02-27 | 2012-06-13 | Toshiba Carrier Corporation | Refrigeration cycle apparatus |
| US8091839B2 (en) * | 2004-08-23 | 2012-01-10 | Thomas & Betts International, Inc. | Scissor type pipe clamp |
| JP2006112668A (en) * | 2004-10-12 | 2006-04-27 | Fujitsu General Ltd | Outdoor unit for multi-chamber type air conditioner |
| JP2006125699A (en) * | 2004-10-27 | 2006-05-18 | Mitsubishi Electric Corp | Outdoor unit for air conditioner |
| JP2006145054A (en) * | 2004-11-16 | 2006-06-08 | Matsushita Electric Ind Co Ltd | Refrigerator |
| KR100758901B1 (en) * | 2004-11-17 | 2007-09-14 | 엘지전자 주식회사 | Multi-type air conditioner |
| JP4374321B2 (en) * | 2005-03-10 | 2009-12-02 | ヤンマー株式会社 | Engine driven heat pump |
-
2011
- 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
- 2011-02-15 JP JP2011553917A patent/JP5655014B2/en active Active
-
2012
- 2012-08-13 US US13/572,948 patent/US20120304685A1/en not_active Abandoned
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1571908A (en) * | 2001-10-19 | 2005-01-26 | 东芝开利株式会社 | Refrigerating equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| EP2538155B1 (en) | 2023-07-19 |
| EP2538155A4 (en) | 2018-04-04 |
| EP2538155A1 (en) | 2012-12-26 |
| US20120304685A1 (en) | 2012-12-06 |
| WO2011099628A1 (en) | 2011-08-18 |
| CN102753913A (en) | 2012-10-24 |
| JPWO2011099628A1 (en) | 2013-06-17 |
| JP5655014B2 (en) | 2015-01-14 |
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