CN1752667A - Oil supplying structure for compressor of air conditioner - Google Patents

Abstract

The present invention discloses a compressor oil-supplying structure of air conditioning machine. It includes lubricating oil buffer portion and refrigerant pipe. The lubricating oil buffer portion is formed between oil distributor and compressor and is used for temporarily storing lubricating oil flowed towards compressor from oil distributor, the refrigerant pipe is passed through the lubricating oil buffer portion and is used for introducing refrigerant into compressor, on the refrigerant pipe an oil-returning hole for sucking lubricating oil from lubricating oil buffer portion is formed. Said invention can more effectively supply oil to compressor so as to raise performance of compresson.

Description

The oil supplying structure for compressor of air-conditioning

Technical field

The present invention relates to the invention of air-conditioning, especially reclaim the oil supplying structure for compressor of the air-conditioning of the lubricating oil in the refrigerant by the spill port of lubricating oil buffer part and refrigerant pipe.

Background technology

Air-conditioning is to carry out heat exchange with the low temperature refrigerant behind the interior hot-air of a kind of suction chamber, and heat-exchanged air is arranged to indoor equipment.Air-conditioning freezes to indoor by carrying out said process repeatedly, perhaps by carrying out the operation heating room air opposite with said process.Air-conditioning is made up of compressor-condenser-expansion valve-evaporimeter, forms the refrigerating/heating loop.

The air-conditioning of additional functions such as air filtration and dehumidifying has also appearred having on the market recently.This air-conditioning can filter behind outdoor suction room air, discharges clean air; After also can sucking humid air, dehumidify, discharge dry air.

As everyone knows, air-conditioning can be divided into a branch bodily form air-conditioning and a bodily form air-conditioning substantially.Divide the indoor set and the off-premises station of bodily form air-conditioning separate, and be arranged at indoor and outdoors respectively.The indoor set of one bodily form air-conditioning and off-premises station form one.

Recently, in one family, need to be provided with more than two air-conditioning or when having that every office all needs air-conditioning is set in the building of office between many, central air-conditioning is set usually.Described central air-conditioning connects several indoor sets on an off-premises station, its effect is identical with the effect that several indoor sets are set.

As shown in Figure 1, 2, traditional central air-conditioning off-premises station 1 is made up of compressor 10, storage tank 20 and outdoor heat converter 30.Indoor set 50 is made up of indoor heat converter 60 and expansion valve 70 etc.

In the described central air-conditioning, be connected with several indoor sets 50 on the off-premises station 1.Be provided with the lower low-voltage tube 90 of built-in pressure ratio higher high-voltage tube 80 and internal pressure between off-premises station 1 and the indoor set 50.

Air-conditioning with said structure, when freezing operation, the outdoor heat converter 30 of off-premises station 1 is as condenser working, allows the HTHP gaseous coolant generation condensation of compressor 10 supplies.When the refrigerant of condensation is flowed through expansion valve 70, be inflated into the gaseous state of low-temp low-pressure, flow to indoor heat converter 60.

Along with carrying out heat exchange with room air, the refrigerant of inflow indoor heat exchanger 60, the two-phase refrigerant that is transformed into the gas-liquid of low-temp low-pressure gradually and deposits.This refrigerant flows to compressor 10 after flowing through storage tank 20 again, finishes a kind of refrigeration cycle of refrigerant thus.

Below, the effect of heating of air-conditioning is described: when heating, the flow direction of refrigerant and the effect of the heat exchanger situation when freezing is opposite.That is, the refrigerant of compressor 10 compression press storage tank 20-〉outdoor heat converter 60-〉expansion valve 70-〉order of outdoor heat converter 30 is mobile.Indoor heat converter 60 allows and flows through its inner HTHP refrigerant and room air carries out heat exchange, plays the condenser effect.Outdoor heat converter 30 allows its inner low-temp low-pressure refrigerant and outdoor air carry out heat exchange, plays the evaporimeter effect.

Shown in Fig. 3～6, conventional outdoor unit 1 below is formed with chassis 2, and a plurality of parts are installed on the chassis 2.The front end on chassis 2 is provided with the front panel 4 that forms front appearance.Front panel 4 is by the positive lower panel 4 of the front upper panel 4 ' and the downside of upside " form.

Positive lower panel 4 " on, be provided with pipe arrangement support 4 " a, promptly positive lower panel 4 " the bottom be cut open a part, and with pipe arrangement support 4 " part of a sealing incision.Pipe arrangement support 4 " high-voltage tube 80 and low-voltage tube 90 are set among a, allow them be communicated with indoor set 50.

Front upper panel 4 ' and positive lower panel 4 " between be provided with central bracket 6, play guiding installation effect.The upper end of front upper panel 4 ' also is provided with upper bracket 6 ', and upper bracket 6 ' goes up the front end of assembling motor seat 48 '.

The left and right sides side of front panel 4, promptly the front end left and right sides bight on chassis 2 is provided with preceding square bearer 8.Preceding square bearer 8 is pressed the long formation longways of above-below direction, and front panel 4 and side grid 34 are supported.

Chassis 2 is provided with compressor 10.Compressor 10 is compressed into high-temperature high-pressure state to refrigerant, and compressor is separately positioned on left and right sides, and promptly the compressor on right side is a constant speed compressor 10 ', and the compressor in left side is a variable speed compressor 10 ".

One side of compressor 10 is respectively equipped with separator 12.Separator 12 separates lubricating oil from the refrigerant that compressor 10 is discharged, reclaimed by compressor 10.

As shown in Figure 5, in indoor heat converter 60, carry out being evaporated into after the heat exchange refrigerant of gas,, flow to housing 22 inside of storage tank 20 by inlet pipe arrangement 24 with room air.Inlet pipe arrangement 24 extends to housing 22 inside of storage tank 20.

Be formed with U font outlet pipe arrangement 26 in the housing 22.Outlet pipe arrangement 26 is connected on the compressor 10.In the refrigerant that flows into, some does not have the liquid refrigerants proportion of evaporation greater than gaseous coolant.Therefore, liquid refrigerants can not be discharged by outlet pipe arrangement 26, has only gas coolant to discharge by exporting pipe arrangement 26.

In addition, the bottom surface of the U font pipe of the outlet pipe arrangement 26 in the housing 22 is formed with the spill port 28 that forms by Precision Machining.Spill port 28 has suitable size, so that utilize the Pa Nuli principle, allows lower outlet pipe arrangement 26 inside of lubricating oil feed pressure.

The lubricating oil that flows into is supplied in the compressor 10 again, allows compressor carry out work better.

The upside of compressor 10 is provided with control cabinet 22.Though diagram in control cabinet 22, is not provided with control assembly and circuit boards such as transformer and electric capacity.Control cabinet 22 has the shape of the open cuboid carton in the place ahead, and its front is provided with the control part cover 22 ' in closed interior space.

The side end on chassis 2 and rearward end are provided with outdoor heat converter 30.Outdoor heat converter 30 allows and is flowing in its inner refrigerant and extraneous air carries out heat exchange, and Cheng Shuan is located at left and right sides.Promptly the left side is provided with " " shape (when overlooking) left side outdoor heat converter 30 ', and the right side is provided with " " shape right side heat exchanger 30 ".The inlet of outdoor heat converter 30 is provided with the body assembly 32 that the water conservancy diversion refrigerant flows into, and outlet is provided with receiver 33.

The left-hand end on chassis 2 and right-hand end are provided with side grid 34, and the rear end is provided with back side grid 36.The quantity of back side grid 36 is a pair of, and is corresponding with outdoor heat converter 30.Be back side grid 36 by the back side, the left side grid 36 ' and the right side heat exchanger 30 that are arranged on outdoor heat converter 30 ' rear, left side " back side, the right side grid 36 at rear " form.

Left side back side grid 36 ' and the back side, right side grid 36 " between be provided with the fixedly back side framework 38 of back side grid 36.The left and right sides bight, rear end of base 2 is formed with back square bearer 38 ' respectively.

The end face outward appearance of off-premises station 1 is formed by top panel 40.Top panel 40 has the rectangular flat shape corresponding with chassis 2, and the left and right sides of the heart is formed with a pair of passage 40 ' therein.

The end face of passage 40 ' is provided with flow-guiding mouth 42.Flow-guiding mouth 42 has the drum that projects upwards, the air stream that water conservancy diversion is discharged by blowing fan 46.The top of flow-guiding mouth 42 is provided with discharges grid 44.

The inboard of flow-guiding mouth 42 is provided with blowing fan 46.Blowing fan 46 is rotated under fan electromotor 48 effects of bottom, plays the effect of discharging air.Fan motor 48 is arranged on the motor cabinet 48 '.

But there are the following problems to have the air-conditioning of said structure.In the conventional art, the outlet pipe arrangement 26 of the storage tank 20 of air-conditioning is formed on enclosure interior by the U oxbow.Therefore the refrigerant pressure that passes to compressor 10 declines by a big margin, and consumes very big energy when allowing compressor 10 that refrigerant is compressed into HTHP.In addition, the lubricating oil of recovery continues to flow into housing 22 inside, and when liquid refrigerants accumulated in the housing 22, the lubricating oil ratio in the housing 22 can descend, and causes the lubricating oil rate of recovery to descend.Moreover, when the capacity of storage tank 20 is big, compare with the lubricating oil around the spill port 28, be difficult to be reclaimed by spill port 28 from spill port 28 lubricating oil far away.

Summary of the invention

Technical problem to be solved by this invention is, a kind of oil supply structure of compressor of air conditioner is provided, and under the state of not establishing storage tank, only appends the lubricating oil buffer part, reclaims the lubricating oil in the refrigerant effectively, and more effectively is compressor oil-supplying.

For the technical solution problem, the technical solution used in the present invention is: a kind of oil supplying structure for compressor of air-conditioning, comprise lubricating oil buffer part, refrigerant pipe, the lubricating oil buffer part is formed between separator and the compressor, the temporary lubricating oil that flows to compressor from separator; The refrigerant pipe runs through the lubricating oil buffer part, to compressor water conservancy diversion refrigerant; On the refrigerant pipe, be formed with the spill port of the lubricating oil that sucks the lubricating oil buffer part.

Be formed with fuel feed pump on the described lubricating oil buffer part, fuel feed pump is communicated with on separator, and the separator separated lubricating oil is imported to the lubricating oil buffer part.

Be formed with oil exit pipe on the described lubricating oil buffer part, oil exit pipe is communicated with on compressor, and the lubricating oil in the lubricating oil buffer part is fed to compressor.

Spill port has suitable size, so that utilize the pressure differential between lubricating oil buffer part and the refrigerant pipe, reclaims the lubricating oil of lubricating oil buffer part.

The invention has the beneficial effects as follows: can improve the performance of compressor more effectively to compressor oil-supplying.

Description of drawings

Fig. 1 is provided with view for traditional central air-conditioning.

Fig. 2 is the block diagram of conventional central air conditioner structure and refrigerant flow regime.

Fig. 3 is the schematic appearance of traditional air-conditioner outdoor unit.

Fig. 4 is the decomposing schematic representation of traditional air-conditioner outdoor unit.

Fig. 5 is the storage tank schematic diagram of conventional art.

Fig. 6 is the internal structure front elevation behind the dismounting front panel of traditional air-conditioner outdoor unit.

Fig. 7 is provided with view for air-conditioning of the present invention.

Fig. 8 is the block diagram of central air-conditioning structure of the present invention and refrigerant flow regime.

Fig. 9 is the detailed pie graph of air-conditioner outdoor unit of the present invention.

Figure 10 is an air-conditioner outdoor unit schematic appearance of the present invention.

Figure 11 is an air-conditioner outdoor unit internal structure decomposing schematic representation of the present invention.

Figure 12 is an embodiment schematic diagram of air-conditioning oil supply structure of the present invention.

Figure 13 is the internal structure front elevation behind the dismounting front panel of air-conditioner outdoor unit of the present invention.

Among the figure:

100: off-premises station 102: outdoor linear expansion valve

110: chassis 112: front panel

114: front grid 116: the front upper support

120: compressor 120 ': constant speed compressor

120 ": variable speed compressor 120a: the coolant injection device

121: even oil pipe 121 ': even oil pipe temperature sensor

122: separator 123: oil return pipe

124: four-way valve 126: the valve brace table

128: fill low temperature valve 130: the supercooling machine

130 ': loopback pipe 130 ' a: supercooling expansion valve

134,134 ': front-side frame 136: central frame

140: left side control cabinet 140 ': the right side control cabinet

142: transformer 144: electric capacity

146: heater element plate 146 ': radiating part

148: heat emission fan 150: baffle plate

152: air conducting hole 154: the air conducting cover

160: top panel 162: passage

164: flow-guiding mouth 166: discharge grid

170: blowing fan 172: the fan motor

174: motor cabinet 180: outdoor heat converter

182: face heat exchanger 184: back side heat exchanger

186: drain pan 188: side panel

190: back side grid 192: back panel

194: upper rear portion support 196: the back square bearer

200: indoor set 202: indoor heat converter

204: expansion valve 206: indoor linear expansion valve

210: common liquid pipe 210 ': branch's liquid pipe

210 ": outdoor liquid pipe 212: common tracheae

212 ': divide bronchus 212 ": outdoor tracheae

214: high-low pressure manages 220 jointly: the lubricating oil buffer part

222: fuel feed pump 224: oil exit pipe

230: refrigerant pipe 232: spill port

The specific embodiment

Below in conjunction with the drawings and specific embodiments the present invention is described in further detail:

Shown in Fig. 7,8, the off-premises station 100 of central air-conditioning of the present invention is by constant speed compressor 120 ', variable speed compressor 120 ", outdoor heat converter 180 and outdoor linear expansion valve 102 compositions such as (LEV:linearexpansion valve abbreviate outdoor LEV below as).Indoor set 200 is made up of indoor heat converter 202, expansion valve 204, indoor linear expansion valve 206 etc.

In the central air-conditioning, on one or more off-premises station 100, connecting a plurality of indoor sets 200.Be provided with between off-premises station 100 and the indoor set 200 as the common liquid pipe 210 of single pipe arrangement and as the common tracheae 212 of single pipe arrangement.The liquid refrigerants that flowing in the common liquid pipe 210, and gaseous coolant in common tracheae 220 internal flows.In order to keep the equilibrium of refrigerant, be provided with the common pipe 214 of the high-low pressure that is communicated with each off-premises station between the plural off-premises station 100.

The common pipe 214 of high-low pressure is communicated with the inlet of each outdoor heat converter 180 of many off-premises stations 100, can keep off-premises station 100 refrigerant equilibrium each other.Thereby allow same obsolete off-premises station 100 heat exchangers 180 that flow in many off-premises stations 100 of refrigerant, can improve the overall thermal exchange efficiency.The common pipe of high-low pressure 214 inside are by freezing or heating flow high pressure or low pressure refrigerant.

Be respectively equipped with the branch's liquid pipe 210 ' of the liquid refrigerants that flows and the branch bronchus 212 ' of mobile gaseous coolant on the indoor set 200.Branch's liquid pipe 210 ' and branch bronchus 212 ' are communicated with common liquid pipe 210 and common tracheae 212.

Many branch's liquid pipe 210 ' has nothing in common with each other by indoor set 200 capacity that are connected with the diameter that divides bronchus 212 '.Indoor LEV206 regulates the cold medium flux that feeds to each indoor set 200.

Off-premises station 100 is formed with the outdoor liquid pipe 210 of the liquid refrigerants that flows " and the outdoor tracheae 212 of mobile gaseous coolant ".Outdoor liquid pipe 210 " and outdoor tracheae 212 " be communicated with common liquid pipe 210 and common tracheae 212.

To shown in Figure 13, central air-conditioning off-premises station structure of the present invention: the chassis 110 that forms the bottom surface is arranged on bottom, supports various parts as Fig. 9.The front end on chassis 110 is provided with the front panel 112 that forms positive basifacial outward appearance.

The upside of front panel 112 is provided with front grid 114.Suck extraneous air by front grid 114, and allow air pass through outdoor heat converter 180.The upside of front grid 114 also is provided with front upper support 116.And the below of front upper support 116, the leading section of assembling motor seat 174.

The end face on chassis 110 is provided with compressor 120.Compressor 120 is compressed into high-temperature high-pressure state to refrigerant, is separately positioned on the left and right sides.Be that the right side is provided with the constant constant speed compressor 120 ' of rotating speed, the left side is provided with the variable speed compressor 120 as variable-ratio heat pump (Variable Speed Heat Pump) ".

The entrance side of compressor 120 is provided with coolant injection device 120a.The operation conditions that coolant injection device 120a presses compressor 120 is if superheating phenomenon then prevents the damage of compressor by the supply refrigerant.Refrigerant used herein is the refrigerant of discharging from following outdoor heat converter 180.

Constant speed compressor 120 ' and variable speed compressor 120 " between be provided with even oil pipe 121, be communicated with constant speed compressor 120 and variable speed compressor 120 '.If a certain side compressor fuel feeding occurs and lacks phenomenon, then can prevent that lubricating oil lacks compressor 120 damages that bring by even oil pipe 121 additional lubricating oil from other compressors.

Compressor 120 uses the turbo-compressor that noise is low, efficient is high usually.Variable speed compressor 120 " be by bearing power, regulate the variable speed turbine compressor of its rotating speed.Use minority indoor set 200, under the low state of bearing power, at first can start variable speed compressor 120 ".If bearing power increases gradually, can't be with variable speed compressor 120 " carry out required operation, then start constant speed compressor 120 '.

Constant speed compressor 120 ' and variable speed compressor 120 " outlet side be respectively equipped with compressor discharge temperature sensor 120 ' b, 120 " b and separator 122.Compressor discharge temperature sensor 120 ' b, 120 " b is used to detect the refrigerant temperature that compressor 120 is discharged.Separator 122 separates lubricating oil from the refrigerant that compressor 120 is discharged, allow compressor 120 reclaim.

The outlet side of separator 122 also is provided with check valve 122 ', prevents the refluence of refrigerant.That is, have only constant speed compressor 120 ' or variable speed compressor 120 " in some when carrying out work, prevent that refrigerant from pouring in down a chimney to compressor 120 inside that are in halted state.

The downside of separator 122 is formed with lubricating oil buffer part 220 and fuel feed pump 222 separately.Lubricating oil buffer part 220 is collected separator 122 separated lubricating oil.Separator 122 separated lubricating oil are fed to lubricating oil buffer part 220 by fuel feed pump 222.The downside of lubricating oil buffer part 220 is provided with oil exit pipe 224, and the lubricating oil of collecting is fed to compressor 120.

By the refrigerant of indoor heat converter 202 heat exchanges, flow by refrigerant pipe 230.Refrigerant pipe 230 runs through lubricating oil buffer part 220, and the one side is connected with the refrigerant suction side of compressor 120.

Separator 122 is communicated with four-way valve 124 by pipe arrangement.Four-way valve 124 is according to refrigeration or heat operation, and the flow direction of conversion refrigerant, its each port are connected on inlet, outdoor heat converter 180 and the indoor set 200 of outlet (or separator), compressor 120 of compressor 120.

Constant speed compressor 120 ' and variable speed compressor 120 " after the refrigerant of discharging is flowed to a position, flow to four-way valve 124.The inlet of this four-way valve 124 is provided with high pressure sensor 124 '.High pressure sensor 124 ' is used to detect the refrigerant pressure that compressor 120 is discharged.

In addition, cross four-way valve 124 and be provided with hot gas (hot gas) pipe 125.Under the effect of heating pipe 125, from the refrigerant of separator 122 inflow four-way valves 124, some flows directly into refrigerant pipe 230.

When air-conditioning carries out work, improve the low pressure refrigerant pressure that flows into refrigerant pipe 230 if desired, then pass through heating pipe 125, directly feed to compressor 120 the high pressure refrigerant of compressor 120 discharge oral-laterals.Heating pipe 125 is provided with hot-blast valve 125 '.Hot-blast valve 125 ' is a kind of effluent valve.

The top first half central authorities on chassis 110 are provided with valve brace table 126.Valve brace table 126 is used for liquid pipe 210 outside the supported chamber ", outdoor tracheae 212 ", high-low pressure manages 214 jointly.Service valve 128 also is located on the valve brace table 126.In addition, passed, be connected with off-premises station 100 by the pipe arrangement gateway 188 ' of the pipe arrangement 210,212,214 of valve brace table 126 supports by side panel 188.

On the last left side of face rearward end on chassis 110, be formed with supercooling machine 130.Supercooling machine 130 is the refrigerant that carries out in the heat exchanger 180 after the heat exchange, and further cooling is arranged on outdoor liquid pipe 210 " the optional position.Outdoor liquid pipe 210 " be connected the outlet side of outdoor heat converter 180.

Supercooling machine 130 is formed by dual pipe.Be outdoor liquid pipe 210 " be positioned at the inboard, its outside is formed with loopback pipe 130 '.Loopback pipe 130 ' forms from the outlet branch of supercooling machine 130.Loopback pipe 130 ' is provided with the supercooling expansion valve 130 ' a by the cooling refrigerant that expands.

From the refrigerant that supercooling machine 130 is discharged, some flows into loopback pipe 130 ', and is cooled when flowing through supercooling expansion valve 130 ' a.During the refrigerant backflow supercooling machine 130 of cooling, allow inboard refrigerant further be cooled off.Backflow refrigerant from supercooling machine 130 flows out flows to refrigerant pipe 230 again, circulates.

The outlet of supercooling machine 130 is provided with liquid pipe temperature sensor 130a.The refrigerant that liquid pipe temperature sensor 130a discharges off-premises station 100 carries out temperature detection.The outlet of supercooling expansion valve 130 ' a is provided with supercooling inlet sensor 130 ' b, and the backflow refrigerant that flows into supercooling machine 130 is carried out temperature detection.On the loopback pipe 130 ' of the backflow refrigerant that the supercooling machine 130 that flowing is discharged, be provided with supercooling outlet sensor 130 ' c.

Flow through the refrigerant of outdoor heat converter 180, flow by central portion, its outside reverse flow and is inflated the low temperature refrigerant that valve (figure slightly) expands, and allows refrigerant temperature reduce more.

One side of supercooling machine 130, the i.e. outdoor liquid pipe 210 of the refrigerant guiding indoor set 200 that outdoor heat converter 180 is discharged " a side, be provided with drying machine 131.Drying machine 131 is removed and is flowing in outdoor liquid pipe 210 " the moisture that contains of refrigerant.

The front end both sides on chassis 110, square bearer 134,134 ' before being formed with respectively.Preceding square bearer 134,134 ' is by the long front end that is formed on chassis 110 longways of above-below direction.Be divided into left forward side framework 134 that is located at left-hand end and the right forward side framework 134 ' that is located at right-hand end.

Preceding square bearer 134,134 ' is used to support front upper framework 116, front grid 114 and control cabinet 140,140 '.The central portion of left forward side framework 134 and right forward side framework 134 ' is formed with the central frame 136 on the left and right directions.

The bottom of central frame 136 is provided with control cabinet 140,140 '.Control cabinet 140,140 ' Cheng Shuan are arranged on left and right sides.Be that control cabinet 140,140 ' is by left side control cabinet 140 that is arranged on the left side and the right side control cabinet 140 ' that is arranged on the right side.Left side control cabinet 140 is fixed on the left forward side framework 134 by hinge 140a, and right side control cabinet 140 ' is fixed on the right forward side framework 134 ' by hinge 140 ' a.

Control cabinet 140,140 ' has the shape of the cuboid carton of front openings, and its place ahead is sealed by front panel 112.Left side control cabinet 140 is provided with the control assembly and the heater element plate 146 of transformer 142, electric capacity 144 in addition.

The back side of heater element plate 146 is formed with radiating part 146 '.Radiating part 146 ' is made up of fin.The upper end, the back side of left side control cabinet 140 is provided with heat emission fan 148.Heat emission fan 148 is made of cross flow fan.Heat emission fan 148 is upwards discharged after sucking air, accelerates the heat exchange of radiating part 146 ', cooling heating element plate 146.

Control cabinet 140,140 ' side are mounted respectively forwardly on the framework 134,134 ' by hinge 140a, 140 ' a, and hinge 140a, 140 ' a can be that the center is rotated forward with the rotating shaft.When needs carry out the maintenance of inner each parts, after control cabinet 140,140 ' rotated forward, carry out operation and get final product.

Central frame 136 is provided with baffle plate 150.Baffle plate 150 is divided into upside space and lower side space to off-premises station 100 inner spaces.Compressor 120 and control cabinet 140,140 ' etc. lower side space promptly are set and the upside space of outdoor heat converter 180 is set.

Identical with control cabinet 140,140 ', baffle plate 150 also is separately positioned on left and right sides.Baffle plate 150 is by horizontal part 150 ' and rake 150 " form.Horizontal part 150 ' is formed on the rear of central frame 136.Rake 150 " downward-sloping certain angle forms from the rear of horizontal part 150 '.

In the baffle plate 150, be formed with air conducting hole 152 on the horizontal part 150 ' of left side baffle plate 150, and the upside in air conducting hole 152 is provided with air conducting cover 154.The place ahead and the top of air conducting cover 154 are in closed state, and its rear is in open state, and the air that the heat emission fan 148 of bottom blows, water conservancy diversion is to the rear.

The end face outward appearance of off-premises station 100 is formed by top panel 160.Top panel 160 has the rectangular flat structure, and Cheng Shuan is formed on left and right sides.On the top panel 160, be formed with passage 162.The edge of passage 162 forms cylindric flow-guiding mouth 164 after extending downwards.Water conservancy diversion 164 is integrally formed on the top panel 160, is made for suitable by plastic material.

Water conservancy diversion 164 has cylindrical shape, the outside water conservancy diversion of air that blowing fan 170 is blowed.The upside of flow-guiding mouth 64 promptly on the passage 162, is formed with the circular row corresponding with passage 162 and goes out grid 166.

The inboard of flow-guiding mouth 164 is provided with blowing fan 170.Blowing fan 170 is driven by the fan electromotor 172 of its below, is used for air row upward.Externally under the effect of power supply, when being rotated, the blowing fan 170 that is fixed on fan electromotor 172 rotating shafts one end is rotated fan electromotor 172, air row upward.

Fan electromotor 172 is fixed by motor cabinet 174.Motor cabinet 174 is by the brace table 174 of rectangular flat shape fixed head 174 ' and support fixation plate 174 ' " constitute.Brace table 174 " Cheng Shuan is formed on left and right sides.A pair of brace table 174 " central portion, fixed head 174 ' is installed.Brace table 174 " front-end and back-end be bent upwards, be separately fixed at front upper support 116 and upper rear portion support 194.

The bottom of top panel 160 is provided with outdoor heat converter 180.Outdoor heat converter 180 allows flow through between inner refrigerant and the extraneous air and produces heat exchange.Cheng Shuan is arranged on front and back.That is, outdoor heat converter 180 is by front heat exchanger 182 that is arranged on top panel 160 leading section downsides and the back side heat exchanger 184 that is arranged on top panel 160 rearward end downsides.

The Lower Half of front heat exchanger 182 is crooked backward.That is, front heat exchanger 182 extends the vertical component effect 182 ' of certain-length downwards by the leading section from front panel 112 and is crooked backward from the lower end of vertical component effect 182 ', press the rake 182 that certain angle tilts " formation.

Rake 182 " the lower end and the lower end of back side heat exchanger 184 be in the adjacent position.The lower end of heat exchanger 180 and chassis 110 are separated by a distance.The side of heat exchanger 180 also is formed with body assembly 180 '.Body assembly 180 ' is assigned to each several part to the refrigerant of compressor 120 supplies.

The inside of outdoor heat converter 180 is provided with the heat-exchanger temperature sensor 180a that detects heat exchanger temperature.The outside of outdoor heat converter 180 is provided with the outdoor temperature sensor 180b that detects external temperature.

The lower end downside of outdoor heat converter 180 is provided with drain pan 186.Drain pan 186 long being formed on longways on the left and right directions after the condensed water collection of outdoor heat converter 180 generations, are discharged to the side.

The end face left-hand end and the right-hand end on chassis 110 are provided with side panel 188.Side panel 188 forms the side outward appearance of off-premises station 100.The front and back of its bottom are formed with pipe arrangement gateway 188 ' respectively.

The rear end on chassis 110 is provided with back side grid 190.The size of back side grid 190 is corresponding with back side heat exchanger 184.The downside of grid 190 is provided with back panel 192 overleaf.

The upper end of back side grid 190 is by the long upper rear portion support 194 that is formed with longways of left and right directions.Upper rear portion support 194 is arranged on the front, upper end of back side grid 190, the brace table 174 of support motor seat 174 " rear end.

The back vertex angle part on chassis 110 is provided with back square bearer 196.Back square bearer 196 long being formed on longways on the above-below direction are supported back side grid 190, back panel 192 and top panel 160.

Below, with reference to accompanying drawing 8～13, the operation principle to central air-conditioning of the present invention is elaborated.

In the air-conditioning of the present invention, on an off-premises station 100, connect many indoor sets 200, can allow part or all indoor set 200 carry out work by user's selection.

When air-conditioning carried out work (refrigeration operation), outdoor LEV102 was open, and refrigerant flows between off-premises station 100 and indoor set 200.At this moment, regulate coolant quantity under the effect of indoor LEV206, obsolete indoor set 200 indoor LEV206 are closed.

At first, illustrate that the refrigerant in the off-premises station 100 flows.After the gaseous coolant of inflow off-premises station 200 flows through four-way valve 124, flow to refrigerant pipe 230.

Produce suction during compressor 120 work, allow the gaseous coolant of refrigerant pipe 230 flow to compressor 120.Feed to the cold medium shortage of compressor 120 or compressor 120 when overheated, by coolant injection device 120a supply refrigerant.

The refrigerant of compressor 120 compressions is discharged to outlet, flows through separator 122.The lubricating oil that separator 122 separates in the refrigerant allows compressor 120 reclaim by oil return pipe 123.

That is, during compressor 120 compression refrigerants, can infiltrate parts of lubricating oil in the refrigerant.Lubricating oil is liquid, and refrigerant is a gaseous state.Therefore the branch oil 122 that can be used as a kind of gas-liquid separator separates.

Separator 122 separated lubricating oil flow to lubricating oil buffer part 220 by the fuel feed pump 222 of separator 122 downsides.

The inside of lubricating oil buffer part 220 is filled separator 122 separated lubricating oil.Refrigerant pipe 230 is used for the refrigerant that water conservancy diversion indoor heat converter 202 is discharged.Refrigerant pipe 230 runs through the part that fills lubricating oil of lubricating oil buffer part 220.Supply refrigerants by refrigerant pipe 230 to compressor 120.

One side of refrigerant pipe 230 is formed with spill port 232, and the lubricating oil of lubricating oil buffer part 220 inside is drawn into refrigerant pipe 230.Spill port 232 should have suitable size, so that utilize the Pa Nuli principle, when promptly refrigerant pipe 230 internal pressures were less than lubricating oil buffer part 220 internal pressures, the lubricating oil of lubricating oil buffer part 220 was sucked into the principle of refrigerant pipe 230.

Spill port 232 is positioned at the ad-hoc location of refrigerant pipe 230, so that be immersed in the lubricating oil in the lubricating oil buffer part 220 always.The lubricating oil that reclaims by spill port 232 is fed in the compressor 120 by refrigerant pipe 230.

In addition, by being formed on the oil exit pipe 224 of lubricating oil buffer part 220 downsides, the lubricating oil in the lubricating oil buffer part 220 is metered into compressor 120.

In addition, connect constant speed compressor 120 ' and variable speed compressor 120 " the effect of even oil pipe 121 under, the internal lubrication oil of both sides compressor 120 can keep balance.

Flow through the refrigerant of separator 122, behind the four-way valve 124 of flowing through, inflow outdoor heat exchanger 180.Outdoor heat converter 180 allows refrigerant by carrying out heat exchange with extraneous air as condenser (during refrigeration) work, is condensed into liquid refrigerants.Flow through the refrigerant of outdoor heat converter 180, when flowing through supercooling machine 130, be further cooled.

Flow through the refrigerant of supercooling machine 130, flowing through is used to remove the drying machine 131 of refrigerant moisture, by common liquid pipe 210, flows into indoor set 200.In addition, flow through in the refrigerant of compressor 120, some also can flow into other off-premises stations 100 by the common pipe 214 of high-low pressure.

Be fed to the refrigerant of other off-premises stations 100, by the common pipe of high-low pressure 214 off-premises station 100 outdoor heat converters 180 that flow in stopping, allow the equilibrium that keep-ups pressure of whole refrigerant, and allow off-premises station 100 heat exchangers 180 in stopping also carry out to a certain degree heat exchange.

When by common liquid pipe 210 refrigerant being fed to indoor set 200, refrigerant is fed to each indoor set 200 respectively by each the branch's liquid pipe 210 ' from common liquid pipe 210 branches.Refrigerant reduces pressure under the effect of expansion valve 204, and carries out heat exchange in indoor heat converter 202.Here, indoor heat converter 202 plays evaporimeter, allows refrigerant become low-pressure gas by heat exchange.

From the refrigerant that indoor heat converter 202 is discharged, the branch bronchus 212 ' of flowing through collects in common tracheae 212, flows into off-premises station 100.Common tracheae 212 and outdoor tracheae 212 " flow into the refrigerant of off-premises station 100, flow to refrigerant pipe 230 by four-way valve 124.By said process, finish one time kind of refrigeration cycle.

When heating operation, refrigerant circulates by the direction opposite with loop direction in the process of refrigerastion, and the indoor LEV106 of indoor set 200 is by opening, and off-premises station LEV102 regulates coolant quantity.

Below, the air flow condition to off-premises station describes.Along with connecting power supply, fan electromotor 172 carries out work, drives blowing fan 170.During blowing fan 170 rotations, extraneous air flows into by front grid 114 and back side grid 190.

Flow into the air of off-premises station 100 inside, when flowing through outdoor heat converter 180, carry out heat exchange.Here, when air-conditioning was worked as refrigeration machine, extraneous air absorbed heat from outdoor heat converter 180, becomes high temperature air.On the contrary, when air-conditioning was worked as the machine that heats, extraneous air was absorbed heats by outdoor heat converter 180, becomes Cryogenic air.

The air that flows through outdoor heat converter 180 is upwards blown out by blowing fan 170.At this moment, the discharge of flow-guiding mouth 164 diversion airs.

Below, with reference to accompanying drawing 12,, be described in detail air-conditioning oil supply structure one embodiment of the present invention.Separator 122 separated lubricating oil flow to lubricating oil buffer part 220 by the fuel feed pump 222 that is formed on separator 122 downsides, allow lubricating oil buffer part 220 keep a certain amount of lubricating oil always.

The downside of lubricating oil buffer part 220 is provided with oil exit pipe 224, presses and the identical amount of coolant quantity that flows into lubricating oil buffer part 220, to compressor 120 supply refrigerants.

Finish the refrigerant of heat exchange in the indoor heat converter 202, flow to compressor 120 by refrigerant pipe 230.Refrigerant pipe 230 runs through lubricating oil buffer part 220.Here, the part of refrigerant pipe 230 is immersed in the lubricating oil in the lubricating oil buffer part 220 always.

In addition, a side of refrigerant pipe 230 is formed with spill port 232.Suck the lubricating oil of lubricating oil buffer part 220 inside.Spill port 232 utilizes the Pa Nuli principle, allows the higher lubricating oil buffer part 220 interior lubricating oil of pressure be inhaled into refrigerant pipe 230 inside.

Spill port 232 will be immersed in the lubricating oil in the lubricating oil buffer part 220 always, and the adjusting of its lubricating oil soakage can determine according to the aperture size that obtains by test.

In the refrigerant pipe 230, not only there is refrigerant, also has the lubricating oil that reclaims from lubricating oil buffer part 220.Thereby, not only can also pass through oil exit pipe 224 to compressor 120 supplying lubricating oils by refrigerant pipe 230 to compressor 120 supplying lubricating oils.

In sum, air-conditioning oil supply structure of the present invention is provided with the lubricating oil buffer part under the situation that storage tank is not set, and can reclaim lubricating oil by original refrigerant pipe.

Because there is not storage tank, can reduce the expense that originally was used to make storage tank, and can substitute traditional storage tank with spill port and separator, effectively lubricating oil is reclaimed.

In addition, by allow the lubricating oil that reclaims with flow to compressor after refrigerant mixes, can improve the lubricants capacity that feeds to compressor, the service behaviour of raising compressor can improve the operating efficiency of air-conditioning.

Moreover, among the present invention, even oil mass is identical with the oil mass of traditional compressor, also the oil mass that feeds to compressor can be increased, the utilization rate of lubricating oil can be improved, and by substituting storage tank with simple structure, the inner space of indoor set can be dwindled, the space service efficiency can be improved.

Claim scope of the present invention is not defined in the above-described embodiments, has the personnel of industry ABC, can carry out a lot of changes in technical scope.

Claims (4)

1, a kind of oil supplying structure for compressor of air-conditioning, it is characterized in that comprising lubricating oil buffer part (220), refrigerant pipe (230), lubricating oil buffer part (220) is formed between separator (122) and the compressor (120), the temporary lubricating oil that flows to compressor (120) from separator (122); Refrigerant pipe (230) runs through lubricating oil buffer part (220), to compressor (120) water conservancy diversion refrigerant; On refrigerant pipe (230), be formed with the spill port (232) of the lubricating oil that sucks lubricating oil buffer part (220).

2, the oil supplying structure for compressor of air-conditioning according to claim 1, it is characterized in that being formed with on the described lubricating oil buffer part (220) fuel feed pump (222), fuel feed pump (222) is communicated with on separator (122), and separator (122) separated lubricating oil is imported to lubricating oil buffer part (220).

3, the oil supplying structure for compressor of air-conditioning according to claim 1, it is characterized in that being formed with on the described lubricating oil buffer part (220) oil exit pipe (224), oil exit pipe (224) is communicated with on compressor (120), and the lubricating oil in the lubricating oil buffer part (220) is fed to compressor (120).

4, the oil supplying structure for compressor of air-conditioning according to claim 1, the size that it is characterized in that described spill port (232) is according to the pressure differential between lubricating oil buffer part (220) and the refrigerant pipe (230), can reclaim the lubricating oil of lubricating oil buffer part (220) and determine.

Images