CN109386986A - Two pipes system heat-reclamation multi-compressors system and its air-conditioner outdoor unit - Google Patents

Abstract

The present invention provides a kind of two pipes system heat-reclamation multi-compressors system and its air-conditioner outdoor unit, air-conditioner outdoor unit includes: major cycle flow path and air injection enthalpy-increasing flow path.Major cycle flow path includes air injection enthalpy-increasing compressor, reversing arrangement and the outdoor heat exchanger being connected by pipeline, and its both ends passes through refrigerant efferent duct and cold media input tube respectively and is connected with the entrance and exit of cooling medium distributor；Air injection enthalpy-increasing flow path includes flash vessel and outdoor throttling set, the entrance of flash vessel is connected by the first pipeline with cold media input tube, gas side outlet is connected by the second pipeline with the puff prot of air injection enthalpy-increasing compressor, liquid side outlet is connected by third pipeline with the input terminal of outdoor heat exchanger, and outdoor throttling set is arranged on third pipeline.By the present invention in that with air injection enthalpy-increasing Compressor Technology and increasing flash vessel and outdoor throttling set, two pipes system heat-reclamation multi-compressors system is set to increase heating air injection enthalpy-increasing function, to significantly improve the low-temperature heating ability and heating effect of the system.

Description

Two pipes system heat-reclamation multi-compressors system and its air-conditioner outdoor unit

Technical field

The present invention relates to air-conditioning technical fields, in particular to a kind of two pipes system heat-reclamation multi-compressors system and its sky Adjust outdoor unit.

Background technique

Currently, there has been no low temperature heat-flash types for existing two pipes system heat-reclamation multi-compressors system, at low ambient temperatures, because Environment temperature is low to cause low pressure low, and return-air density is small, and refrigerant circulation is small, thus there is a problem of heating capacity deficiency.

Summary of the invention

At least one in order to solve the above-mentioned technical problem, it is an object of the present invention to provide one kind for two pipes system heat Recycle the air-conditioner outdoor unit of multi-line system.

It is another object of the present invention to provide a kind of two pipes system heat-reclamation multi-compressors including above-mentioned air-conditioner outdoor unit System.

To achieve the goals above, the technical solution of first aspect present invention provides a kind of air-conditioner outdoor unit, is used for two Control heat-reclamation multi-compressors system, the two pipes system heat-reclamation multi-compressors system include multiple air conditioner indoor unit and the connection sky The cooling medium distributor of outdoor unit and the multiple air conditioner indoor unit is adjusted, the air-conditioner outdoor unit includes: major cycle flow path, including Air injection enthalpy-increasing compressor, reversing arrangement and the outdoor heat exchanger being connected by pipeline, and the both ends difference of the major cycle flow path It is connected by refrigerant efferent duct and cold media input tube with the entrance and exit of the cooling medium distributor；With air injection enthalpy-increasing stream Road, including flash vessel and outdoor throttling set, the entrance of the flash vessel are connected by the first pipeline with the cold media input tube Logical, the gas side outlet of the flash vessel is connected by the second pipeline with the puff prot of the air injection enthalpy-increasing compressor, the flash distillation The liquid side outlet of device is connected by third pipeline with the input terminal of the outdoor heat exchanger, and the outdoor throttling set is arranged in institute It states on third pipeline.

The air-conditioner outdoor unit for two pipes system heat-reclamation multi-compressors system that the technical solution of first aspect present invention provides, By using air injection enthalpy-increasing Compressor Technology and increase flash vessel and outdoor throttling set, increases jet increasing for air-conditioner outdoor unit Enthalpy flow path makes two pipes system heat-reclamation multi-compressors system increase heating air injection enthalpy-increasing function, to significantly increase two pipes system heat The refrigerant circulation when operation of multi-line system low-temperature heating is recycled, and then extends two pipes system heat-reclamation multi-compressors system hypothermia The range of heating operation significantly improves the heating effect of two pipes system heat-reclamation multi-compressors system.

Specifically, existing two pipes system heat-reclamation multi-compressors system, because air-conditioner outdoor unit side muffler only has low pressure cold Matchmaker can not provide middle pressure refrigerant for the puff prot of air injection enthalpy-increasing compressor, thus be difficult to realize spray enthalpy in compressor puff prot, therefore And the low temperature forced technology of air injection enthalpy-increasing is also only applied at present in heat pump and three-pipe heating recovery system, not yet occurs having jet The two pipes system heat-reclamation multi-compressors system of enthalpy-increasing function；And the application is by improving air-conditioner outdoor unit, so that two pipes system Heat-reclamation multi-compressors system has air injection enthalpy-increasing function, to realize two pipes system heat recovery multiplex using air injection enthalpy-increasing technology The breakthrough of the application of machine system hypothermia heat-flash technology, meets two pipes system heat-reclamation multi-compressors system in lower outdoor environment temperature Under requirement, improve the comfort of heating.

Specifically, air-conditioner outdoor unit includes major cycle flow path and air injection enthalpy-increasing flow path, and major cycle flow path includes passing through pipeline Connected air injection enthalpy-increasing compressor, reversing arrangement and outdoor heat exchanger, one end of major cycle flow path by refrigerant efferent duct with it is cold The entrance of matchmaker's distributor is connected, and conveys refrigerant to cooling medium distributor, cooling medium distributor is in the multiple air conditioning chambers of disengaging The refrigerant of machine is allocated, then sends the refrigerant after heat exchange back to air-conditioner outdoor unit by cold media input tube, is finally completed circulation；? During refrigerant flows, all parts on all parts and air injection enthalpy-increasing flow path on major cycle flow path accordingly cooperate, and make Two pipes system heat-reclamation multi-compressors system realize its refrigeration and heat-production functions (such as pure refrigeration mode, pure heating mode, main refrigeration mode, Main heating mode etc.).

Wherein, compared with the existing technology, the application increases flash vessel and outdoor throttling set in air-conditioner outdoor unit, and dodges The entrance of steaming device is connected by the first pipeline with the cold media input tube of air-conditioner outdoor unit, and gas side outlet passes through the second pipeline and spray The puff prot of gas enthalpy-increasing compressor is connected, and liquid side outlet is connected by third pipeline with the input terminal of outdoor heat exchanger, and outdoor Throttling set is arranged on third pipeline, thus defeated from refrigerant when heating operation (including pure heating mode and main heating mode) Enter pipe and flow back to the refrigerant of air-conditioner outdoor unit after flash vessel is divided into two-way, gaseous coolant can flow directly into compressor jet Mouthful, and the liquid refrigerants for flowing to outdoor heat exchanger then can enter back into outdoor heat exchange after outdoor throttling set carries out reducing pressure by regulating flow Then device evaporation endothermic flows back to compressor return air mouth, to make the pressure of compressor return air mouth lower than the pressure of compressor puff prot Power, and then realize the air injection enthalpy-increasing of compressor.In other words, the application be equivalent to existing air-conditioner outdoor unit muffler (i.e. Cold media input tube) on increase flash vessel and outdoor throttling set, make heating operation (including pure heating mode and main heating mould Formula) when system at least part of throttling function carried out in air-conditioner outdoor unit side, the refrigerant pressure at such cold media input tube The pressure of outdoor heat exchanger outlet can be higher than, become middle pressure two-phase refrigerant, rather than low pressure refrigerant in the prior art；Middle pressure two Phase refrigerant carries out gas-liquid separation in flash vessel, and the middle pressure gaseous coolant of generation enters compressor puff prot and carries out air injection enthalpy-increasing, and The middle pressure liquid refrigerants generated enters back into outdoor heat exchanger heat exchange after reducing pressure by regulating flow, and cocurrent returns the gas returning port of compressor.

It is understood that being respectively equipped with shut-off valve on cold media input tube and refrigerant efferent duct, existing skill is corresponded respectively to Low pressure valve and high pressure valve in art；And high pressure refrigerant, middle pressure refrigerant, the low pressure refrigerant in the application only illustrate operation of air conditioner mistake In journey in refrigerant circulation flow path at different location refrigerant pressure opposite height, there is no the limitations of specific numerical values recited.

In addition, the air-conditioner outdoor unit in above-mentioned technical proposal provided by the invention can also have following supplementary technology special Sign:

In the above-mentioned technical solutions, second pipeline is equipped with the first control valve that can control its on-off.

First control valve is set on the second pipeline, and the first control valve can control the on-off of the second pipeline, to realize The selective on-off of second pipeline, in this way, first can be passed through in the case where the systems such as refrigerating operaton do not need spray enthalpy tonifying Qi Control valve disconnects the second pipeline, prevents from impacting the other function (such as pure refrigeration mode, main refrigeration mode) of system, To improve the reliability of system.

In the above-mentioned technical solutions, first control valve is solenoid valve.

Using solenoid valve as the first control valve, the on-off of the second pipeline can either be effectively controlled, and is convenient for coupled system Realize automation control.Certainly, the first control valve is not limited to solenoid valve, is also possible to other kinds of valve, as long as can Control the on-off of the second pipeline.

In any of the above-described technical solution, the first check valve is additionally provided on the third pipeline, first check valve is pressed According to the direction one-way conduction for the input terminal for flowing to the outdoor heat exchanger by the liquid side outlet of the flash vessel.

First check valve is set on third pipeline, and the first check valve is outdoor according to being flowed to by the liquid side outlet of flash vessel The direction one-way conduction of the input terminal of heat exchanger ensure that the liquid refrigerants of only flash vessel output can successively flow to outdoor section Device and outdoor heat exchanger are flowed, and is unable to reverse flow, in this way, outdoor throttling set only plays reducing pressure by regulating flow in heating operation Effect；And the high pressure refrigerant that compressor is discharged when refrigerating operaton can only flow to outdoor heat exchanger, and cannot be through outdoor throttling set It flows to flash vessel and the bad phenomenons such as causes the unnecessary pressure loss or collaborate, to ensure that the normal of cooling system function Operation.

In the above-mentioned technical solutions, first check valve be located at the flash vessel liquid side outlet and the outdoor throttling Between device.

First check valve is arranged between the liquid side outlet of flash vessel and outdoor throttling set, refrigerant is further ensured Outdoor throttling set can only be flowed to by the liquid side outlet of flash vessel, and is unable to reverse flow, to further prevent from compression The high pressure refrigerant of machine discharge enters phenomena such as outdoor throttling set leads to the unnecessary pressure loss or collaborates and influences system Efficiency.

In any of the above-described technical solution, the outdoor throttling set includes a restricting element；Alternatively, the outdoor section Flowing device includes multiple restricting elements being in parallel；Alternatively, the outdoor throttling set includes at least one restricting element and divides Manifold solenoid valve, at least one described restricting element and the solenoid diverter valve are in parallel.

Outdoor throttling set primarily serves reducing pressure by regulating flow function, and concrete form is unrestricted.Such as: it can only include one A restricting element also may include multiple restricting elements being in parallel, and is also possible to restricting element and solenoid diverter valve (that is: rises To the solenoid valve of shunting function, all refrigerants is avoided to enter restricting element) parallel combination etc., be also possible to other forms； And the form of restricting element is also unrestricted, for example capillary, electric expansion valve etc. can be with, will not enumerate herein, by In can realize reducing pressure by regulating flow function, and without being detached from design philosophy and objective of the invention, thus all in guarantor of the invention It protects in range, concrete form and quantity can rationally be adjusted in the actual production process according to the specific structure and demand of product It is whole.

In any of the above-described technical solution, the reversing arrangement includes four-way valve, second one-way valve, third check valve, The first port of four check valves, the 5th check valve and the 6th check valve, the four-way valve is increased by the 4th pipeline and the jet The exhaust outlet of enthalpy compressor is connected, and the second port of the four-way valve passes through the 5th pipeline and the 6th pipeline and the room respectively The input terminal of external heat exchanger is connected with output end, the third port of the four-way valve pass through respectively the 7th pipeline and the 8th pipeline with The cold media input tube and the refrigerant efferent duct are connected, and the 4th port of the four-way valve passes through the 9th pipeline and the spray The gas returning port of gas enthalpy-increasing compressor is connected, and the output end of the outdoor heat exchanger also passes through the tenth pipeline and the refrigerant exports Pipe is connected；Wherein, the second one-way valve is arranged on the 5th pipeline, and according to as described in second port flow direction The direction one-way conduction of the input terminal of outdoor heat exchanger；The third check valve is arranged on the 6th pipeline, and according to by The output end of the outdoor heat exchanger flows to the direction one-way conduction of the second port；4th check valve is arranged described On 7th pipeline, and according to the direction one-way conduction for flowing to the third port by the cold media input tube；Described 5th is unidirectional Valve is arranged on the 8th pipeline, and according to the direction one-way conduction for flowing to the refrigerant efferent duct by the third port； The 6th check valve setting flows to the refrigerant on the tenth pipeline, and according to the output end by the outdoor heat exchanger The direction one-way conduction of efferent duct.

Reversing arrangement includes four-way valve and multiple check valves, and four-way valve and multiple check valves match, and realizes air conditioning chamber The functions such as the selective on-off of the outer each pipeline of machine and one-way conduction, and then each function such as ensure that cooling system, heating Normal realization.

When pure heating operation, the first port of four-way valve is connected to third port, and second port is connected to the 4th port, the One control valve is opened, the refrigerant flow direction of system are as follows: and the gaseous coolant of high temperature and pressure is discharged by the exhaust outlet of air injection enthalpy-increasing compressor, The first port that four-way valve is reached through the 4th pipeline is flowed out by the third port of four-way valve, through the 8th pipeline and the 5th check valve Reach refrigerant efferent duct；Heat release is condensed subsequently into each air conditioner indoor unit is entered after cooling medium distributor distribution, then through refrigerant Distributor becomes middle pressure two-phase refrigerant and reaches cold media input tube；Middle pressure two-phase refrigerant reaches flash vessel entrance through the first pipeline, It is separated in flash vessel, the middle pressure gaseous coolant of generation is exported from gas side to be discharged, and reaches compression through the second pipeline, the first control valve The puff prot of machine, into compressor compresses chamber；The middle pressure liquid refrigerants generated is discharged from liquid side outlet, through third pipeline, first Check valve reaches outdoor throttling set reducing pressure by regulating flow and becomes low-pressure gaseous refrigerant subsequently into outdoor heat exchanger evaporation endothermic, with The second port that four-way valve is reached by the 6th pipeline, third check valve is flowed out by the 4th port of four-way valve, through the 9th pipeline Return to the gas returning port of compressor.

When pure refrigerating operaton, the first port of four-way valve is connected to second port, and third port is connected to the 4th port, the One control valve is closed, the refrigerant flow direction of system are as follows: and the gaseous coolant of high temperature and pressure is discharged by the exhaust outlet of air injection enthalpy-increasing compressor, Through the 4th pipeline reach four-way valve first port, by four-way valve second port flow out, through the 5th pipeline, second one-way valve into Enter outdoor heat exchanger, becomes high temperature and pressure liquid refrigerant after outdoor heat exchanger condenses heat release, through the tenth pipeline, the 6th check valve Reach refrigerant efferent duct；Become low pressure gas subsequently into each air conditioner indoor unit evaporation endothermic is entered after cooling medium distributor distribution State refrigerant, then cold media input tube is reached through cooling medium distributor；Low-pressure gaseous refrigerant reaches four through the 7th pipeline, the 4th check valve The third port of port valve flows out the gas returning port that compressor is returned to through the 9th pipeline from the 4th port of four-way valve.

When main heating operation, the first port of four-way valve is connected to third port, and second port is connected to the 4th port, the One control valve is opened, the refrigerant flow direction of system are as follows: and the gaseous coolant of high temperature and pressure is discharged by the exhaust outlet of air injection enthalpy-increasing compressor, The first port that four-way valve is reached through the 4th pipeline is flowed out by the third port of four-way valve, through the 8th pipeline and the 5th check valve Reach refrigerant efferent duct；Heat release is condensed subsequently into the air conditioner indoor unit for entering heating operation after cooling medium distributor distribution, is become At middle pressure two-phase refrigerant, middle pressure two-phase refrigerant can be divided into two-way after entering cooling medium distributor supercooling, and refrigerant can be through throttling all the way Element flows to the outlet of cooling medium distributor, and the air conditioner indoor unit evaporation endothermic that another way refrigerant can enter refrigerating operaton becomes low Gaseous coolant is pressed then to reach the outlet of cooling medium distributor, two-way refrigerant reaches cold in the form of middle pressure two-phase refrigerant after converging Matchmaker's input pipe；Pressure two-phase refrigerant reaches flash vessel entrance through the first pipeline in later, separates in flash vessel, calms the anger in generation State refrigerant is exported from gas side and is discharged, and the puff prot of compressor is reached through the second pipeline, the first control valve, into compressor compresses Chamber；The middle pressure liquid refrigerants generated is discharged from liquid side outlet, reaches outdoor throttling set throttling through third pipeline, the first check valve Decompression, become low pressure refrigerant, become low-pressure gaseous refrigerant subsequently into outdoor heat exchanger evaporation endothermic, after through the 6th pipeline, Third check valve reaches the second port of four-way valve, is flowed out by the 4th port of four-way valve, returns to compressor through the 9th pipeline Gas returning port.

When main refrigerating operaton, the first port of four-way valve is connected to second port, and third port is connected to the 4th port, the One control valve is closed, the refrigerant flow direction of system are as follows: and the gaseous coolant of high temperature and pressure is discharged by the exhaust outlet of air injection enthalpy-increasing compressor, Through the 4th pipeline reach four-way valve first port, by four-way valve second port flow out, through the 5th pipeline, second one-way valve into Enter outdoor heat exchanger, becomes high temperature and pressure liquid refrigerant after outdoor heat exchanger condenses heat release, through the tenth pipeline, the 6th check valve Reach refrigerant efferent duct；Into cooling medium distributor refrigerant after gas-liquid separation, the liquid refrigerants isolated is through reducing pressure by regulating flow The outlet for becoming low-pressure gaseous refrigerant arrival cooling medium distributor into the air conditioner indoor unit evaporation endothermic of refrigerating operaton, is isolated Gaseous coolant can enter heating operation air conditioner indoor unit condense heat release, return to cooling medium distributor supercooling after enter back into refrigeration Interior machine evaporation endothermic becomes the outlet that low-pressure gaseous refrigerant reaches cooling medium distributor, and two-way low-pressure gaseous refrigerant reaches after converging Cold media input tube；Then low-pressure gaseous refrigerant reaches the third port of four-way valve through the 7th pipeline, the 4th check valve, from four-way valve The outflow of the 4th port the gas returning port of compressor is returned to through the 9th pipeline.

In the above-mentioned technical solutions, the outlet of the second one-way valve is located at the outdoor throttling set and changes with the outdoor Between the input terminal of hot device.

The outlet of second one-way valve is arranged between outdoor throttling set and the input terminal of outdoor heat exchanger, it is ensured that system The high temperature and pressure refrigerant that compressor is discharged when cold operation will not enter outdoor heat exchanger through outdoor throttling set, so as to avoid not The necessary pressure loss improves the refrigerating capacity of system.

In the above-mentioned technical solutions, the first gas-liquid separator is additionally provided on the 9th pipeline.

The first gas-liquid separator is set on the 9th pipeline, the refrigerant for capableing of convection current time compressor gas returning port carries out gas-liquid point From and then improving the use reliability of compressor so that preventing liquid refrigerant stream from returning compressor gas returning port generates liquid hit phenomenon.

In the above-mentioned technical solutions, the reversing arrangement further includes the second control valve, the both ends point of second control valve It is not connected with the exhaust outlet and the refrigerant efferent duct, and second control valve is under pure refrigeration mode and closes shape State.

Reversing arrangement further includes the second control valve, and the both ends of the second control valve are defeated with the exhaust outlet of compressor and refrigerant respectively Outlet pipe is connected, and the second control valve is in close state under pure refrigeration mode, then at least partly air conditioner indoor unit system In the case where heat operation (i.e. pure heating operation, main heating operation, main refrigerating operaton), by opening the second control valve, it can make A part of the high pressure gaseous refrigerant of exhaust outlet of compressor discharge is directly entered cooling medium distributor, subsequently into heating Machine condenses heat release, so that reducing high pressure gaseous refrigerant reaches the pressure loss heated during interior machine, improves system Heating capacity, ensure that system it is main refrigeration etc. functions realization.Preferably, the second control valve is solenoid valve.

Specifically, for for the pure heating operation and main heating operation the case where, the high pressure gaseous of compressor discharge Refrigerant can be divided into two-way, enter cooling medium distributor through four-way valve and the second control valve respectively, this is equivalent to increase high temperature height The circulation area of gaseous coolant is pressed, thus reduces the pressure loss of outside high temperature and pressure refrigerant；For main refrigerating operaton For situation, the high pressure gaseous refrigerant of compressor discharge can also be divided into two-way, enter outdoor heat exchanger through four-way valve all the way Condensation heat release reaches refrigerant efferent duct after becoming liquid refrigerants, and another way then reaches refrigerant efferent duct, two-way through the second control valve Refrigerant is mixed into two-phase refrigerant and enters cooling medium distributor；Liquid refrigerants after gas-liquid separation enters machine evaporation in refrigeration and inhales Heat, and gaseous coolant after gas-liquid separation enters machine condensation heat release in heating, the liquid refrigerants after heat exchange can also be through refrigerant Machine heat exchange in refrigeration is entered back into after distributor supercooling, since the refrigerant of the machine into heating does not pass through the section of throttling set etc. Stream effect, thus also reduce the pressure loss of the refrigerant of machine into heating.

The technical solution of second aspect of the present invention provides a kind of two pipes system heat-reclamation multi-compressors system, comprising: such as first Air-conditioner outdoor unit described in any one of aspect technical solution；Multiple air conditioner indoor unit, multiple air conditioner indoor unit are in parallel； Cooling medium distributor is arranged between the air-conditioner outdoor unit and the multiple air conditioner indoor unit, for connecting the air conditioning chamber Outer machine and the multiple air conditioner indoor unit, and the refrigerant for passing in and out multiple air conditioner indoor unit is allocated.

The two pipes system heat-reclamation multi-compressors system that the technical solution of second aspect of the present invention provides, because including first aspect skill The air-conditioner outdoor unit of any one of art scheme, thus there are all beneficial effects possessed by any of the above-described technical solution, herein It repeats no more.

In the above-mentioned technical solutions, the cooling medium distributor includes the second gas-liquid separator being connected by pipeline, master Subcooler, main throttling set, multiple refrigeration check valves, multiple heating check valves, multiple refrigeration solenoid valves and multiple heating electromagnetism Valve；Wherein, the entrance of second gas-liquid separator is connected with the entrance of the coolant distributor device, second gas-liquid The liquid side outlet of separator is by the main road entrance of piping connection to the main subcooler, and the main throttling set setting is described The main road of main subcooler exports between the bypass entrance of the main subcooler, and the bypass outlet of the main subcooler passes through pipeline It is connected to the outlet of the cooling medium distributor；The gas side outlet of second gas-liquid separator passes through multiple heating electromagnetism Valve is respectively connected to the first end of multiple air conditioner indoor unit, and the second end of multiple air conditioner indoor unit passes through multiple respectively The heating check valve is connected to the main road entrance of the main subcooler, and multiple heating check valves are according to by multiple described The second end of air conditioner indoor unit flows to the direction one-way conduction of the main road entrance of the main subcooler；The main road of the main subcooler Outlet is respectively connected to the second end of multiple air conditioner indoor unit, and multiple refrigeration by multiple refrigeration check valves It unidirectionally leads in the direction for the second end that check valve flows to multiple air conditioner indoor unit according to the main road outlet by the main subcooler It is logical；The first end of multiple air conditioner indoor unit passes through multiple refrigeration solenoid valves respectively and is connected to the cooling medium distributor Outlet.

Cooling medium distributor includes the second gas-liquid separator, main subcooler, main throttling set, multiple heating solenoid valves, more A refrigeration solenoid valve, multiple heating check valves and multiple refrigeration check valves, these components match, and realize cooling medium distributor The functions such as the selective on-off of each pipeline in interior and each air conditioner indoor unit and one-way conduction, and then ensure that system system The normal realization of each functions such as cold, heating.

When pure heating operation, multiple heating solenoid valves are opened, and multiple refrigeration solenoid valves are closed, and air-conditioner outdoor unit exports cold Matchmaker's flow direction are as follows: the high pressure gaseous refrigerant of refrigerant efferent duct output enters the second gas-liquid separator, from the second gas-liquid separator Gas side outlet outflow high-pressure gaseous refrigerant respectively enter multiple air conditioner indoor unit through multiple heating solenoid valves, in air conditioning chamber It is condensed into high-pressure liquid refrigerant after the indoor heat exchanger heat exchange of machine, then passes through interior machine electric expansion valve, it is cold to become middle pressure two-phase Matchmaker；Then the main road entrance that the main subcooler of cooling medium distributor is reached by multiple heating check valves, into main subcooler mistake It exports and flows out from main road after cold, then the bypass through main throttling set, main subcooler reaches the outlet of cooling medium distributor, returns to The cold media input tube of air-conditioner outdoor unit.During this, the aperture of main throttling set maintains standard-sized sheet, to minimize resistance, as far as possible The pressure loss that two-phase refrigerant is pressed in reduction guarantees that the pressure for reaching the two-phase refrigerant at flash vessel is enough to realize subsequent jet Increasing enthalpy.

When pure refrigerating operaton, multiple refrigeration solenoid valves are opened, and multiple heating solenoid valves are closed, and air-conditioner outdoor unit exports cold Matchmaker's flow direction are as follows: the high temperature and pressure liquid refrigerant of refrigerant efferent duct output enters the second gas-liquid separator, from the second gas-liquid separator The high-pressure liquid refrigerant of liquid side outlet outflow reach main subcooler main road entrance, into after the supercooling of main subcooler, go out from main road The liquid refrigerants of mouth outflow is divided into two-way, becomes low pressure after the heat absorption of main subcooler bypass through main throttling set reducing pressure by regulating flow all the way The outlet of gaseous coolant arrival cooling medium distributor；Enter from the another way refrigerant of main road outlet outflow through multiple refrigeration check valves Multiple air conditioner indoor unit, first flow through interior machine electric expansion valve reducing pressure by regulating flow, become low subsequently into indoor heat exchanger evaporation endothermic After pressing gaseous coolant, the outlet of cooling medium distributor is reached through multiple refrigeration solenoid valves.

When main heating operation, heating solenoid valve corresponding with heating operation air conditioner indoor unit is opened, and refrigeration solenoid valve is closed, Refrigeration solenoid valve corresponding with refrigerating operaton air conditioner indoor unit is opened, and heating solenoid valve is closed, the refrigerant of air-conditioner outdoor unit output Flow direction are as follows: the high pressure gaseous refrigerant of refrigerant efferent duct output enters the second gas-liquid separator, from the second gas-liquid separator The high-pressure gaseous refrigerant of gas side outlet outflow enters machine in heating through heating solenoid valve, exchanges heat with the indoor heat exchanger of machine in heating After be condensed into high-pressure liquid refrigerant, then machine electric expansion valve in it, becomes middle pressure two-phase refrigerant, then by corresponding Heating check valve reach the main road entrance of main subcooler, become high-pressure liquid refrigerant, high-pressure liquid after the supercooling of main subcooler Refrigerant is divided into two-way, enters in corresponding refrigeration through refrigeration check valve corresponding with refrigerating operaton air conditioner indoor unit all the way Machine first passes through the indoor heat exchanger evaporation endothermic for entering the interior machine that freezes in freezing after the electric expansion valve reducing pressure by regulating flow of machine, becomes Then middle pressure gaseous coolant reaches the outlet of cooling medium distributor through corresponding refrigeration solenoid valve；It is subcooled through main subcooler Another way refrigerant afterwards then throttles the laggard bypass for becoming owner of subcooler through main throttling set, becomes to reach after middle pressure two-phase refrigerant cold The outlet of matchmaker's distributor.

When main refrigerating operaton, heating solenoid valve corresponding with heating operation air conditioner indoor unit is opened, and refrigeration solenoid valve is closed, Refrigeration solenoid valve corresponding with refrigerating operaton air conditioner indoor unit is opened, and heating solenoid valve is closed, the refrigerant of air-conditioner outdoor unit output Flow direction are as follows: the high temperature and pressure liquid refrigerant of refrigerant efferent duct output enters the second gas-liquid separator, from the second gas-liquid separator The high-pressure gaseous refrigerant of gas side outlet outflow enters machine in heating through heating solenoid valve corresponding with interior machine is heated, with machine in heating Indoor heat exchanger heat exchange after be condensed into high-pressure liquid refrigerant, then machine electric expansion valve in it, becomes middle pressure two-phase refrigerant, Then the main road entrance of main subcooler, the liquid side outlet with the second gas-liquid separator are reached by corresponding heating check valve The high-pressure liquid refrigerant of outflow converges；The machine out of the liquid side outlet of the second gas-liquid separator flows out high-pressure liquid refrigerant and heating The high-pressure liquid refrigerant of discharge reaches main subcooler main road entrance after converging, into after the supercooling of main subcooler, from main road outlet stream Liquid refrigerants out is divided into two-way, becomes low-pressure gaseous after the heat absorption of main subcooler bypass through main throttling set reducing pressure by regulating flow all the way The outlet of refrigerant arrival cooling medium distributor；It is single that refrigeration corresponding with the interior machine that freezes is passed through from the another way refrigerant of main road outlet outflow Enter machine in refrigeration to valve, first flow through machine electric expansion valve reducing pressure by regulating flow in refrigeration, subsequently into the indoor heat exchange of machine in freezing After device evaporation endothermic becomes low-pressure gaseous refrigerant, the outlet of cooling medium distributor is reached through multiple refrigeration solenoid valves.

In the above-mentioned technical solutions, the cooling medium distributor further includes diverter branch, and one end of the diverter branch connects The arbitrary node being connected between the outlet and the main road entrance of the main subcooler of the heating check valve, the diverter branch The other end is connected to the outlet of the cooling medium distributor, and the diverter branch is equipped with the third control for controlling its on-off Valve processed.

Diverter branch is additionally set in cooling medium distributor, and one end of diverter branch is connected to going out for heating check valve Arbitrary node between mouth and the main road entrance of main subcooler, the other end of diverter branch are connected to going out for cooling medium distributor Mouthful, in this way, the case where for pure heating operation and main heating operation, the middle pressure two-phase refrigerant flowed out by heating check valve, only A part is subcooled into main subcooler, and another part refrigerant then directly reaches cooling medium distributor by diverter branch Outlet improves the pressure for reaching the two-phase refrigerant of flash vessel inlet so as to press the pressure loss of two-phase refrigerant in reducing, And then the air injection enthalpy-increasing effect of compressor is improved, further increase low-temperature heating effect；Simultaneously, additionally it is possible to machine pipeline in reducing Noise.Preferably, third control valve is solenoid valve.

In the above-mentioned technical solutions, the quantity of the diverter branch is multiple, and multiple diverter branch are in parallel.

The quantity of diverter branch is multiple, and multiple diverter branch are in parallel, and can be further reduced by heating check valve The middle pressure two-phase refrigerant of outflow enters the amount of main subcooler, so as to be further reduced the pressure loss of middle pressure two-phase refrigerant, The pressure for reaching the two-phase refrigerant of flash vessel inlet is further increased, and then further increases the air injection enthalpy-increasing effect of compressor Fruit further increases low-temperature heating effect.

Preferably, the quantity of diverter branch is two, had both met the demand of air injection enthalpy-increasing in this way, and had in turn simplified product Pipe-line layout.

In the above-mentioned technical solutions, described when the two pipes system heat-reclamation multi-compressors system is run with pure heating mode The aperture that the control system of two pipes system heat-reclamation multi-compressors system controls the main throttling set is adjusted to maximum, and controls described the The diverter branch is connected in three control valves.

The case where for pure heating operation and main heating operation, the aperture of the main throttling set of cooling medium distributor is adjusted to Maximum, while third control valve conducting diverter branch is controlled, not only reduce the cold medium flux into main subcooler in this way, but also reduce By the pressure loss of the refrigerant of main subcooler, to further reduce the pressure loss of middle pressure two-phase refrigerant, further The pressure for reaching the two-phase refrigerant of flash vessel inlet is improved, and then further increases the air injection enthalpy-increasing effect of compressor, into One step improves low-temperature heating effect.

In any of the above-described technical solution, the cooling medium distributor further includes auxiliary subcooler and auxiliary throttling set, described The main road of auxiliary subcooler is arranged between the liquid side outlet of second gas-liquid separator and the main road entrance of the main subcooler, The auxiliary throttling set is arranged between the main road outlet of the auxiliary subcooler and the main road entrance of the main subcooler, described auxiliary The bypass of subcooler is arranged between the bypass outlet of the main subcooler and the outlet of the cooling medium distributor.

Auxiliary subcooler and auxiliary throttling set are set between the second gas-liquid separator and main subcooler, can be further increased The degree of supercooling of the liquid refrigerants of main subcooler main road output, to further increase the refrigerating capacity of system.

Additional aspect and advantage of the invention will become obviously in following description section, or practice through the invention Recognize.

Detailed description of the invention

Above-mentioned and/or additional aspect of the invention and advantage will become from the description of the embodiment in conjunction with the following figures Obviously and it is readily appreciated that, in which:

Fig. 1 is the structural schematic diagram of the two pipes system heat-reclamation multi-compressors system of first embodiment of the invention；

Fig. 2 is the structural schematic diagram for the two pipes system heat-reclamation multi-compressors system that this hair invents second embodiment；

Fig. 3 is the schematic illustration under the pure heating mode of the system of two pipes system heat-reclamation multi-compressors shown in Fig. 1；

Fig. 4 is the schematic illustration under the pure refrigeration mode of the system of two pipes system heat-reclamation multi-compressors shown in Fig. 1；

Fig. 5 is the schematic illustration under the main heating mode of the system of two pipes system heat-reclamation multi-compressors shown in Fig. 1；

Fig. 6 is the schematic illustration under the main refrigeration mode of the system of two pipes system heat-reclamation multi-compressors shown in Fig. 1；

Fig. 7 is the schematic illustration of the two pipes system heat-reclamation multi-compressors system of some embodiments of the invention.

Wherein, corresponding relationship of the Fig. 1 into Fig. 6 between appended drawing reference and component names are as follows:

10 compressors, 11 exhaust outlets, 12 gas returning ports, 13 puff prots, 201 first check valves, 202 second one-way valves, 203 Three check valves, 204 the 4th check valves, 205 the 5th check valves, 206 the 6th check valves, 207 four-way valves, 208 first control valves, 209 second control valves, 30 outdoor heat exchangers, 401 first pipelines, 402 second pipelines, 403 third pipelines, 404 the 4th pipelines, 405 the 5th pipelines, 406 the 6th pipelines, 407 the 7th pipelines, 408 the 8th pipelines, 409 the 9th pipelines, 410 the tenth pipelines, 411 is cold Matchmaker's input pipe, 412 refrigerant efferent ducts, 50 flash vessels, throttling set outside Room 60,70 first gas-liquid separators, 80 refrigerants distribution dress It sets, 81 second gas-liquid separators, 82 main subcoolers, 83 main throttling sets, 841 heating solenoid valves, 842 refrigeration solenoid valves, 843 systems Hot check valve, 844 refrigeration check valves, 85 auxiliary subcoolers, 86 auxiliary throttling sets, 87 diverter branch, 88 third control valves, 90 air-conditionings Indoor unit, 91 indoor heat exchangers, 92 electric expansion valves.

Specific embodiment

To better understand the objects, features and advantages of the present invention, with reference to the accompanying drawing and specific real Applying mode, the present invention is further described in detail.It should be noted that in the absence of conflict, the implementation of the application Feature in example and embodiment can be combined with each other.

In the following description, numerous specific details are set forth in order to facilitate a full understanding of the present invention, still, the present invention may be used also To be implemented using other than the one described here other modes, therefore, protection scope of the present invention is not by described below Specific embodiment limitation.

Referring to Fig. 1 to Fig. 7 description two pipes system heat-reclamation multi-compressors system according to some embodiments of the invention and its Air conditioner indoor unit.

As depicted in figs. 1 and 2, the air-conditioner outdoor unit that the embodiment of first aspect present invention provides is returned for two pipes system heat Receive multi-line system, two pipes system heat-reclamation multi-compressors system include multiple air conditioner indoor unit 90 and connect air-conditioner outdoor unit with it is multiple The cooling medium distributor 80 of air conditioner indoor unit 90, air-conditioner outdoor unit include: major cycle flow path and air injection enthalpy-increasing flow path.

Specifically, major cycle flow path includes being changed by air injection enthalpy-increasing compressor 10, reversing arrangement and outdoor that pipeline is connected Hot device 30, and the both ends of major cycle flow path pass through refrigerant efferent duct 412 (A is managed in figure) respectively and cold media input tube 411 (schemes total B Pipe) it is connected with the entrance and exit of cooling medium distributor 80；Air injection enthalpy-increasing flow path includes flash vessel 50 and outdoor throttling set 60, the entrance (in figure a mouthfuls) of flash vessel 50 is connected by the first pipeline 401 with cold media input tube 411, the gas side of flash vessel 50 Outlet (in figure b mouthfuls) is connected by the second pipeline 402 with the puff prot 13 of air injection enthalpy-increasing compressor 10, and the liquid side of flash vessel 50 goes out Mouth (in figure c mouthfuls) is connected by third pipeline 403 with the input terminal of outdoor heat exchanger 30, and outdoor throttling set 60 is arranged in third On pipeline 403.

The air-conditioner outdoor unit for two pipes system heat-reclamation multi-compressors system that the embodiment of first aspect present invention provides leads to It crosses using 10 technology of air injection enthalpy-increasing compressor and increases flash vessel 50 and outdoor throttling set 60, increase spray for air-conditioner outdoor unit Gas increasing enthalpy flow path makes two pipes system heat-reclamation multi-compressors system increase heating air injection enthalpy-increasing function, to significantly increase two pipes Refrigerant circulation when heating recycling multi-line system low-temperature heating operation, and then extend two pipes system heat-reclamation multi-compressors system The range of low-temperature heating operation, significantly improves the heating effect of two pipes system heat-reclamation multi-compressors system.

Specifically, existing two pipes system heat-reclamation multi-compressors system, because air-conditioner outdoor unit side muffler only has low pressure cold Matchmaker can not provide middle pressure refrigerant for the puff prot 13 of air injection enthalpy-increasing compressor 10, thus be difficult real in 10 puff prot of compressor 13 Enthalpy is now sprayed, so the low temperature forced technology of air injection enthalpy-increasing is also only applied in heat pump and three-pipe heating recovery system at present, is not yet gone out Now with the two pipes system heat-reclamation multi-compressors system of air injection enthalpy-increasing function；And the application is by improving air-conditioner outdoor unit, So that two pipes system heat-reclamation multi-compressors system has air injection enthalpy-increasing function, to realize two pipes system using air injection enthalpy-increasing technology The breakthrough of the application of heat-reclamation multi-compressors system hypothermia heat-flash technology, meets two pipes system heat-reclamation multi-compressors system in lower room Requirement at a temperature of external environment improves the comfort of heating.

Specifically, air-conditioner outdoor unit includes major cycle flow path and air injection enthalpy-increasing flow path, and major cycle flow path includes passing through pipeline One end of connected air injection enthalpy-increasing compressor 10, reversing arrangement and outdoor heat exchanger 30, major cycle flow path passes through refrigerant efferent duct 412 are connected with the entrance of cooling medium distributor 80, convey refrigerant, 80 pairs of cooling medium distributor disengaging to cooling medium distributor 80 The refrigerant of multiple air conditioner indoor unit 90 is allocated, then the refrigerant after heat exchange is sent back to outside air conditioning chamber by cold media input tube 411 Machine is finally completed circulation；It is each on all parts and air injection enthalpy-increasing flow path on major cycle flow path during refrigerant flowing A component accordingly cooperates, and two pipes system heat-reclamation multi-compressors system is made to realize its refrigeration and heat-production functions (such as pure refrigeration mode, pure heating Mode, main refrigeration mode, main heating mode etc.).

Wherein, compared with the existing technology, the application increases flash vessel 50 and outdoor throttling set 60 in air-conditioner outdoor unit, And the entrance of flash vessel 50 is connected by the first pipeline 401 with the cold media input tube 411 of air-conditioner outdoor unit, gas side outlet passes through Second pipeline 402 is connected with the puff prot 13 of air injection enthalpy-increasing compressor 10, and liquid side outlet passes through third pipeline 403 and outdoor heat exchange The input terminal of device 30 is connected, and outdoor throttling set 60 is arranged on third pipeline 403, thus heating operation (including pure heating Mode and main heating mode) when flow back to the refrigerant of air-conditioner outdoor unit from cold media input tube 411 and be divided into two by flash vessel 50 Lu Hou, gaseous coolant can flow directly into 10 puff prot 13 of compressor, and the liquid refrigerants for flowing to outdoor heat exchanger 30 can then pass through Outdoor throttling set 60 enters back into 30 evaporation endothermic of outdoor heat exchanger after carrying out reducing pressure by regulating flow and then flows back to 10 gas returning port of compressor 12, so that the pressure of 10 gas returning port 12 of compressor be made to be lower than the pressure of 10 puff prot 13 of compressor, and then realize compressor 10 Air injection enthalpy-increasing.In other words, the application is equivalent to increases on the muffler (i.e. cold media input tube 411) of existing air-conditioner outdoor unit Flash vessel 50 and outdoor throttling set 60, the section of system when making heating operation (including pure heating mode and main heating mode) At least part for flowing function is carried out in air-conditioner outdoor unit side, and the refrigerant pressure at such cold media input tube 411 can be higher than outdoor The pressure that heat exchanger 30 exports, becomes middle pressure two-phase refrigerant, rather than low pressure refrigerant in the prior art；Middle pressure two-phase refrigerant exists Flash vessel 50 carries out gas-liquid separation, and the middle pressure gaseous coolant of generation enters 10 puff prot 13 of compressor and carries out air injection enthalpy-increasing, and gives birth to At middle pressure liquid refrigerants entered back into after reducing pressure by regulating flow outdoor heat exchanger 30 exchange heat, cocurrent return compressor 10 gas returning port 12.

It is understood that being respectively equipped with shut-off valve on cold media input tube 411 and refrigerant efferent duct 412, correspond respectively to Low pressure valve and high pressure valve in the prior art；And high pressure refrigerant, middle pressure refrigerant, the low pressure refrigerant in the application only illustrate air-conditioning In operational process in refrigerant circulation flow path at different location refrigerant pressure opposite height, there is no the limits of specific numerical values recited System.

Specific structure and the work that air-conditioner outdoor unit provided by the present application is described in detail below with reference to some embodiments are former Reason.

Embodiment one

Second pipeline 402 is equipped with the first control valve 208 that can control its on-off, as depicted in figs. 1 and 2.

First control valve 208 is set on the second pipeline 402, and the first control valve 208 can control the logical of the second pipeline 402 It is disconnected, so that the selective on-off of the second pipeline 402 is realized, in this way, the case where the systems such as refrigerating operaton do not need spray enthalpy tonifying Qi Under, second pipeline 402 can be disconnected by the first control valve 208, prevent to the other function of system (such as pure refrigeration mode, Main refrigeration mode etc.) it impacts, to improve the reliability of system.

Preferably, the first control valve 208 is solenoid valve.

Using solenoid valve as the first control valve 208, the on-off of the second pipeline 402 can either be effectively controlled, and convenient for matching Collaboration system realizes automation control.Certainly, the first control valve 208 is not limited to solenoid valve, is also possible to other kinds of valve, As long as the on-off of the second pipeline 402 can be controlled.

Further, the first check valve 201 is additionally provided on third pipeline 403, the first check valve 201 is according to by flash vessel 50 Liquid side outlet flow to outdoor 60 outdoor heat exchanger 30 of throttling set input terminal direction one-way conduction, such as Fig. 1 and Fig. 2 institute Show.

First check valve 201 is set on third pipeline 403, and the first check valve 201 is according to the liquid side by flash vessel 50 Outlet flows to the direction one-way conduction of the input terminal of outdoor heat exchanger 30, ensure that the liquid refrigerants energy that only flash vessel 50 exports It is enough successively to flow to outdoor throttling set 60 and outdoor heat exchanger 30, and it is unable to reverse flow, in this way, outdoor throttling set 60 only exists Reducing pressure by regulating flow effect is played when heating operation；And the high pressure refrigerant that compressor 10 is discharged when refrigerating operaton can only flow to outdoor heat exchange Device 30, and cannot be flowed to through outdoor throttling set 60 flash vessel 50 cause the unnecessary pressure loss or collaborate etc. it is bad existing As to ensure that the normal operation of cooling system function.

Further, the first check valve 201 is located between the liquid side outlet of flash vessel 50 and outdoor throttling set 60, such as schemes Shown in 1 and Fig. 2.

First check valve 201 is arranged between the liquid side outlet of flash vessel 50 and outdoor throttling set 60, is further protected Outdoor throttling set 60 can only be flowed to by the liquid side outlet of flash vessel 50 by having demonstrate,proved refrigerant, and be unable to reverse flow, thus further Preventing the high pressure refrigerant being discharged from compressor 10 to enter outdoor throttling set 60 leads to the unnecessary pressure loss or collaborates Phenomena such as and influence system energy efficiency.

Further, as depicted in figs. 1 and 2, reversing arrangement includes that four-way valve 207, second one-way valve 202, third are unidirectional The first port of valve 203, the 4th check valve 204, the 5th check valve 205 and the 6th check valve 206, four-way valve 207 passes through the 4th Pipeline 404 is connected with the exhaust outlet 11 of air injection enthalpy-increasing compressor 10, and the second port of four-way valve 207 passes through the 5th pipeline respectively 405 and the 6th pipeline 406 be connected with the input terminal of outdoor heat exchanger 30 and output end, the third port of four-way valve 207 is led to respectively It crosses the 7th pipeline 407 and the 8th pipeline 408 is connected with cold media input tube 411 and refrigerant efferent duct 412, the of four-way valve 207 Four ports are connected by the 9th pipeline 409 with the gas returning port 12 of air injection enthalpy-increasing compressor 10, the output end of outdoor heat exchanger 30 Also it is connected by the tenth pipeline 410 with refrigerant efferent duct 412；Wherein, second one-way valve 202 is arranged on the 5th pipeline 405, And according to the direction one-way conduction for the input terminal for flowing to outdoor heat exchanger 30 by second port；The setting of third check valve 203 is the On six pipelines 406, and flow to according to the output end by outdoor heat exchanger 30 the direction one-way conduction of second port；4th check valve 204 are arranged on the 7th pipeline 407, and according to the direction one-way conduction for flowing to third port by cold media input tube 411；5th is single It is arranged on the 8th pipeline 408 to valve 205, and according to the direction one-way conduction for flowing to refrigerant efferent duct 412 by third port；The The setting of six check valves 206 flows to refrigerant efferent duct 412 on the tenth pipeline 410, and according to the output end by outdoor heat exchanger 30 Direction one-way conduction.

Reversing arrangement includes four-way valve 207 and multiple check valves, and four-way valve 207 and multiple check valves are matched, realized The functions such as the selective on-off of each pipeline of air-conditioner outdoor unit and one-way conduction, so ensure that system it is pure refrigeration, it is pure heating, The normal realization of each functions such as main heating.

When pure heating operation, the first port of four-way valve 207 is connected to third port, and second port and the 4th port connect Logical, the first control valve 208 is opened, as shown in figure 3, the refrigerant of system flows to are as follows: the gaseous coolant of high temperature and pressure is by air injection enthalpy-increasing The exhaust outlet 11 of compressor 10 is discharged, and the first port of four-way valve 207 is reached through the 4th pipeline 404, by the third of four-way valve 207 Port outflow reaches refrigerant efferent duct 412 through the 8th pipeline 408 and the 5th check valve 205；Subsequently into cooling medium distributor 80 Enter each air conditioner indoor unit 90 after distribution and condense heat release, then becomes middle pressure two-phase refrigerant through cooling medium distributor 80 and reach refrigerant Input pipe 411；Middle pressure two-phase refrigerant reaches 50 entrance of flash vessel through the first pipeline 401, separates in flash vessel 50, in generation It presses gaseous coolant to export from gas side to be discharged, the puff prot 13 of compressor 10 is reached through the second pipeline 402, the first control valve 208, into Enter 10 compression chamber of compressor；The middle pressure liquid refrigerants generated is discharged from liquid side outlet, through third pipeline 403, the first check valve 201 It reaches outdoor 60 reducing pressure by regulating flow of throttling set and becomes low-pressure gaseous refrigerant, then subsequently into 30 evaporation endothermic of outdoor heat exchanger The second port that four-way valve 207 is reached through the 6th pipeline 406, third check valve 203 is flowed out by the 4th port of four-way valve 207, The gas returning port 12 of compressor 10 is returned to through the 9th pipeline 409.

When pure refrigerating operaton, the first port of four-way valve 207 is connected to second port, and third port and the 4th port connect Logical, the first control valve 208 is closed, as shown in figure 4, the refrigerant of system flows to are as follows: the gaseous coolant of high temperature and pressure is by air injection enthalpy-increasing The exhaust outlet 11 of compressor 10 is discharged, and the first port of four-way valve 207 is reached through the 4th pipeline 404, by the second of four-way valve 207 Port outflow enters outdoor heat exchanger 30 through the 5th pipeline 405, second one-way valve 202, after outdoor heat exchanger 30 condenses heat release Become high temperature and pressure liquid refrigerant, reaches refrigerant efferent duct 412 through the tenth pipeline 410, the 6th check valve 206；Subsequently into cold Matchmaker's distributor 80 enters each 90 evaporation endothermic of air conditioner indoor unit and becomes low-pressure gaseous refrigerant after distributing, then distributes and fill through refrigerant Set 80 arrival cold media input tubes 411；Low-pressure gaseous refrigerant reaches four-way valve 207 through the 7th pipeline 407, the 4th check valve 204 Third port flows out the gas returning port 12 that compressor 10 is returned to through the 9th pipeline 409 from the 4th port of four-way valve 207.

When main heating operation, the first port of four-way valve 207 is connected to third port, and second port and the 4th port connect Logical, the first control valve 208 is opened, as shown in figure 5, the refrigerant of system flows to are as follows: the gaseous coolant of high temperature and pressure is by air injection enthalpy-increasing The exhaust outlet 11 of compressor 10 is discharged, and the first port of four-way valve 207 is reached through the 4th pipeline 404, by the third of four-way valve 207 Port outflow reaches refrigerant efferent duct 412 through the 8th pipeline 408 and the 5th check valve 205；Subsequently into cooling medium distributor 80 Heat release is condensed into the air conditioner indoor unit 90 of heating operation after distribution, becomes middle pressure two-phase refrigerant, middle pressure two-phase refrigerant enters cold Two-way can be divided into after after the supercooling of matchmaker's distributor 80, refrigerant can flow to the outlet of cooling medium distributor 80 through restricting element all the way, 90 evaporation endothermic of air conditioner indoor unit that another way refrigerant can enter refrigerating operaton becomes low-pressure gaseous refrigerant and then reaches refrigerant point Outlet with device 80, two-way refrigerant reach cold media input tube 411 after converging in the form of middle pressure two-phase refrigerant；Pressure two in later Phase refrigerant reaches 50 entrance of flash vessel through the first pipeline 401, separates in flash vessel 50, and the middle pressure gaseous coolant of generation is from gas side Outlet discharge reaches the puff prot 13 of compressor 10 through the second pipeline 402, the first control valve 208, compresses into compressor 10 Chamber；The middle pressure liquid refrigerants generated is discharged from liquid side outlet, reaches outdoor throttling through third pipeline 403, the first check valve 201 and fills 60 reducing pressure by regulating flow are set, low pressure refrigerant is become, becomes low-pressure gaseous refrigerant subsequently into 30 evaporation endothermic of outdoor heat exchanger, is passed through after 6th pipeline 406, third check valve 203 reach the second port of four-way valve 207, are flowed out by the 4th port of four-way valve 207, warp 9th pipeline 409 returns to the gas returning port 12 of compressor 10.

When main refrigerating operaton, the first port of four-way valve 207 is connected to second port, and third port and the 4th port connect Logical, the first control valve 208 is closed, as shown in fig. 6, the refrigerant of system flows to are as follows: the gaseous coolant of high temperature and pressure is by air injection enthalpy-increasing The exhaust outlet 11 of compressor 10 is discharged, and the first port of four-way valve 207 is reached through the 4th pipeline 404, by the second of four-way valve 207 Port outflow enters outdoor heat exchanger 30 through the 5th pipeline 405, second one-way valve 202, after outdoor heat exchanger 30 condenses heat release Become high temperature and pressure liquid refrigerant, reaches refrigerant efferent duct 412 through the tenth pipeline 410, the 6th check valve 206；Into refrigerant point After gas-liquid separation, the liquid refrigerants isolated enters the air conditioner indoor unit of refrigerating operaton through reducing pressure by regulating flow to refrigerant with device 80 90 evaporation endothermics become the outlet that low-pressure gaseous refrigerant reaches cooling medium distributor 80, and the gaseous coolant isolated can enter heating The air conditioner indoor unit 90 of operation condenses heat release, returns to after cooling medium distributor 80 is subcooled and enters back into machine evaporation endothermic in refrigeration and become Low-pressure gaseous refrigerant reaches the outlet of cooling medium distributor 80, and two-way low-pressure gaseous refrigerant reaches cold media input tube 411 after converging； Then low-pressure gaseous refrigerant reaches the third port of four-way valve 207 through the 7th pipeline 407, the 4th check valve 204, from four-way valve 207 the 4th port outflow returns to the gas returning port 12 of compressor 10 through the 9th pipeline 409.

Further, the outlet of second one-way valve 202 is located outside the input terminal of throttling set 60 Yu outdoor heat exchanger 30 Between, as depicted in figs. 1 and 2.

The outlet of second one-way valve 202 is arranged between outdoor throttling set 60 and the input terminal of outdoor heat exchanger 30, The high temperature and pressure refrigerant that compressor 10 is discharged when ensuring refrigerating operaton will not enter outdoor heat exchanger through outdoor throttling set 60 30, so as to avoid the unnecessary pressure loss, improve the refrigerating capacity of system.

Further, it is additionally provided with the first gas-liquid separator 70 on the 9th pipeline 409, as depicted in figs. 1 and 2.

First gas-liquid separator 70 is set on the 9th pipeline 409, is capable of the refrigerant of convection current time 10 gas returning port 12 of compressor Gas-liquid separation is carried out, so that preventing liquid refrigerant stream from returning 10 gas returning port 12 of compressor generates liquid hit phenomenon, and then improves compression The use reliability of machine 10.

Further, reversing arrangement further includes the second control valve 209, as depicted in figs. 1 and 2, the two of the second control valve 209 End is connected with exhaust outlet 11 and refrigerant efferent duct 412 respectively, and the second control valve 209 is under pure refrigeration mode and closes shape State.

Reversing arrangement further includes the second control valve 209, the both ends of the second control valve 209 exhaust outlet with compressor 10 respectively 11 are connected with refrigerant efferent duct 412, and the second control valve 209 is in close state under pure refrigeration mode, then at least In the case where 90 heating operation of part air conditioner indoor unit (i.e. pure heating operation, main heating operation, main refrigerating operaton), pass through opening Second control valve 209, a part for the high pressure gaseous refrigerant that 10 exhaust outlet 11 of compressor can be made to be discharged are directly entered cold Matchmaker's distributor 80 condenses heat release subsequently into machine in heating, so that reducing high pressure gaseous refrigerant reaches machine in heating The pressure loss in the process improves the heating capacity of system, ensure that the realization of the functions such as the main refrigeration of system.Preferably, Two control valves are solenoid valve.

Specifically, for for the pure heating operation and main heating operation the case where, high temperature and pressure gas that compressor 10 is discharged State refrigerant can be divided into two-way, enter cooling medium distributor 80 through four-way valve 207 and the second control valve 209 respectively, such as Fig. 3 and Fig. 5 It is shown, this circulation area equivalent to increase high pressure gaseous refrigerant, thus reduce outside high temperature and pressure refrigerant The pressure loss；For for the main refrigerating operaton the case where, the high pressure gaseous refrigerant that compressor 10 is discharged can also be divided into two-way, Enter outdoor heat exchanger 30 through four-way valve 207 all the way and condense arrival refrigerant efferent duct 412 after heat release becomes liquid refrigerants, such as Fig. 6 Shown, another way then reaches refrigerant efferent duct 412 through the second control valve 209, and two-way refrigerant is mixed into two-phase refrigerant and enters refrigerant Distributor 80；Liquid refrigerants after gas-liquid separation enters machine evaporation endothermic in refrigeration, and gaseous state after gas-liquid separation is cold Matchmaker enters machine condensation heat release in heating, and the liquid refrigerants after heat exchange can also enter back into refrigeration after the supercooling of cooling medium distributor 80 Interior machine heat exchange, the refrigerant due to entering machine in heating does not pass through the throttling action of throttling set etc., thus also reduces entrance The pressure loss of the refrigerant of machine in heating.

It is of course also possible to be not provided with the second control valve, by being heated to the refrigerant after machine heat exchange in freezing, then will It is sent into the second gas-liquid separator, or is sent directly into machine condensation heat release in heating, also can be realized main refrigerating operaton.

Specifically, outdoor throttling set 60 includes a restricting element, as depicted in figs. 1 and 2.

Embodiment two

Difference with embodiment one is: outdoor throttling set 60 includes multiple restricting elements being in parallel.

Embodiment three

Difference with embodiment one is: outdoor throttling set 60 includes at least one restricting element and solenoid diverter valve, At least one restricting element and solenoid diverter valve are in parallel.

Outdoor throttling set 60 primarily serves reducing pressure by regulating flow function, and concrete form is unrestricted.Such as: can only include One restricting element also may include multiple restricting elements being in parallel, and be also possible to restricting element and solenoid diverter valve (i.e.: The solenoid valve for playing shunting function avoids all refrigerants from entering restricting element) parallel combination etc., be also possible to other shapes Formula；And the form of restricting element is also unrestricted, for example capillary, electric expansion valve 92 etc. can be no longer to arrange one by one herein It lifts, due to that can realize reducing pressure by regulating flow function, and without being detached from design philosophy and objective of the invention, thus all in the present invention Protection scope in, concrete form and quantity can be closed in the actual production process according to the specific structure and demand of product Reason adjustment.

As depicted in figs. 1 and 2, the two pipes system heat-reclamation multi-compressors system that the embodiment of second aspect of the present invention provides, packet It includes: air-conditioner outdoor unit, 90 cooling medium distributor 80 of multiple air conditioner indoor unit such as any one of first aspect embodiment.

Specifically, multiple air conditioner indoor unit 90 are in parallel；Cooling medium distributor 80 is arranged in air-conditioner outdoor unit and multiple skies It adjusts between indoor unit 90, for connecting air-conditioner outdoor unit and multiple air conditioner indoor unit 90, and to the multiple air conditioner indoor unit 90 of disengaging Refrigerant be allocated.

The two pipes system heat-reclamation multi-compressors system that the embodiment of second aspect of the present invention provides, because including that first aspect is implemented The air-conditioner outdoor unit of any one of example, thus there are all beneficial effects possessed by any of the above-described embodiment, it is no longer superfluous herein It states.

The specific of two pipes system heat-reclamation multi-compressors system provided by the present application is described in detail below with reference to some embodiments Structure and working principle.

Embodiment one

Cooling medium distributor 80 includes the second gas-liquid separator 81 being connected by pipeline, main subcooler 82, main throttling dress Set 83, multiple refrigeration check valves 844, multiple heating check valves 843, multiple refrigeration solenoid valves 842 and multiple heating solenoid valves 841；Wherein, the entrance of the second gas-liquid separator 81 is connected with the entrance of coolant distributor device, the second gas-liquid separator 81 Liquid side outlet by the main road entrance of piping connection to main subcooler 82, the master of main subcooler 82 is arranged in main throttling set 83 Between way outlet and the bypass entrance of main subcooler 82, the bypass outlet of main subcooler 82 is distributed by piping connection to refrigerant to be filled Set 80 outlet；The gas side of second gas-liquid separator 81, which is exported, is respectively connected to multiple air-conditionings by multiple heating solenoid valves 841 The first end of indoor unit 90, the second end of multiple air conditioner indoor unit 90 are connected to main mistake by multiple heating check valves 843 respectively The main road entrance of cooler 82, and multiple heating check valves 843 flow to main supercooling according to the second end by multiple air conditioner indoor unit 90 The direction one-way conduction of the main road entrance of device 82；The main road outlet of main subcooler 82 is connected respectively by multiple refrigeration check valves 844 It is connected to the second end of multiple air conditioner indoor unit 90, and multiple refrigeration check valves 844 are according to the main road outlet stream by main subcooler 82 To the direction one-way conduction of the second end of multiple air conditioner indoor unit 90；The first end of multiple air conditioner indoor unit 90 passes through multiple respectively Refrigeration solenoid valve 842 is connected to the outlet of cooling medium distributor 80, as depicted in figs. 1 and 2.

Cooling medium distributor 80 includes the second gas-liquid separator 81, main subcooler 82, main throttling set 83, multiple heatings electricity Magnet valve 841, multiple refrigeration solenoid valves 842, multiple heating check valves 843 and multiple refrigeration check valves 844, these components match It closes, realize the selective on-off of each pipeline in cooling medium distributor 80 and in each air conditioner indoor unit 90 and unidirectionally leads The functions such as logical, and then the normal realization for each function such as ensure that cooling system, heating.

When pure heating operation, multiple heating solenoid valves 841 are opened, and multiple refrigeration solenoid valves 842 are closed, as shown in figure 3, empty Adjust the refrigerant flow direction of outdoor unit output are as follows: the high pressure gaseous refrigerant that refrigerant efferent duct 412 exports enters the second gas-liquid separation Device 81, from the gas side of the second gas-liquid separator 81 outlet outflow high-pressure gaseous refrigerant through multiple heating solenoid valves 841 respectively into Enter multiple air conditioner indoor unit 90, is condensed into high-pressure liquid refrigerant after exchanging heat with the indoor heat exchanger 91 of air conditioner indoor unit 90, then By interior machine electric expansion valve 92, become middle pressure two-phase refrigerant；Then refrigerant distribution dress is reached by multiple heating check valves 843 The main road entrance for setting 80 main subcooler 82 is exported from main road after being subcooled into main subcooler 82 and is flowed out, and is then filled through main throttling The bypass for setting 83, main subcooler 82 reaches the outlet of cooling medium distributor 80, returns to the cold media input tube 411 of air-conditioner outdoor unit. During this, the aperture of main throttling set 83 maintains standard-sized sheet, to minimize resistance, minimizes the pressure of middle pressure two-phase refrigerant Loss guarantees that the pressure for reaching the two-phase refrigerant at flash vessel 50 is enough to realize subsequent air injection enthalpy-increasing.

When pure refrigerating operaton, multiple refrigeration solenoid valves 842 are opened, and multiple heating solenoid valves 841 are closed, as shown in figure 4, empty Adjust the refrigerant flow direction of outdoor unit output are as follows: the high temperature and pressure liquid refrigerant that refrigerant efferent duct 412 exports enters the second gas-liquid separation Device 81, the high-pressure liquid refrigerant flowed out from the liquid side outlet of the second gas-liquid separator 81 reach main 82 main road entrance of subcooler, into After becoming owner of the supercooling of subcooler 82, it is divided into two-way from the liquid refrigerants of main road outlet outflow, throttles drop through main throttling set 83 all the way It presses and becomes the outlet that low-pressure gaseous refrigerant reaches cooling medium distributor 80 after the heat absorption of main 82 bypass of subcooler；From main road outlet stream Another way refrigerant out enters multiple air conditioner indoor unit 90 through multiple refrigeration check valves 844, first flows through interior machine electric expansion valve 92 Reducing pressure by regulating flow after becoming low-pressure gaseous refrigerant subsequently into 91 evaporation endothermic of indoor heat exchanger, is arrived through multiple refrigeration solenoid valves 842 Up to the outlet of cooling medium distributor 80.

When main heating operation, heating solenoid valve 841 corresponding with heating operation air conditioner indoor unit 90 is opened, and freeze solenoid valve 842 close, and refrigeration solenoid valve 842 corresponding with refrigerating operaton air conditioner indoor unit 90 is opened, and heating solenoid valve 841 is closed, such as Fig. 5 It is shown, the refrigerant flow direction of air-conditioner outdoor unit output are as follows: the high pressure gaseous refrigerant that refrigerant efferent duct 412 exports enters the second gas Liquid/gas separator 81 enters from the high-pressure gaseous refrigerant of the gas side of the second gas-liquid separator 81 outlet outflow through heating solenoid valve 841 Machine in heating is condensed into high-pressure liquid refrigerant after exchanging heat with the indoor heat exchanger 91 for heating interior machine, and then electromechanical son is swollen in it Swollen valve 92 becomes middle pressure two-phase refrigerant, then enters by the main road that corresponding heating check valve 843 reaches main subcooler 82 Mouthful, become high-pressure liquid refrigerant after the supercooling of main subcooler 82, high-pressure liquid refrigerant is divided into two-way, all the way through empty with refrigerating operaton It adjusts the corresponding refrigeration check valve 844 of indoor unit 90 to enter machine in corresponding refrigeration, first passes through the electronic expansion of machine in freezing After 92 reducing pressure by regulating flow of valve enter freeze in machine 91 evaporation endothermic of indoor heat exchanger, become middle pressure gaseous coolant, then pass through and its Corresponding refrigeration solenoid valve 842 reaches the outlet of cooling medium distributor 80；Another way refrigerant after the supercooling of main subcooler 82 is then It throttles the laggard bypass for becoming owner of subcooler 82 through main throttling set 83, reaches cooling medium distributor 80 after becoming middle pressure two-phase refrigerant Outlet.

When main refrigerating operaton, heating solenoid valve 841 corresponding with heating operation air conditioner indoor unit 90 is opened, and freeze solenoid valve 842 close, and refrigeration solenoid valve 842 corresponding with refrigerating operaton air conditioner indoor unit 90 is opened, and heating solenoid valve 841 is closed, such as Fig. 6 It is shown, the refrigerant flow direction of air-conditioner outdoor unit output are as follows: the high temperature and pressure liquid refrigerant that refrigerant efferent duct 412 exports enters the second gas Liquid/gas separator 81 passes through system corresponding with interior machine is heated from the high-pressure gaseous refrigerant of the gas side of the second gas-liquid separator 81 outlet outflow Thermoelectrical magnetic valve 841, which enters, heats interior machine, is condensed into high-pressure liquid refrigerant after exchanging heat with the indoor heat exchanger 91 for heating interior machine, then Machine electric expansion valve 92 in it becomes middle pressure two-phase refrigerant, then reaches main mistake by corresponding heating check valve 843 The main road entrance of cooler 82, the high-pressure liquid refrigerant flowed out with the liquid side outlet of the second gas-liquid separator 81 converge；From the second gas The high-pressure liquid refrigerant of the liquid side outlet outflow of liquid/gas separator 81 reaches after converging with the high-pressure liquid refrigerant for heating interior machine discharge Main 82 main road entrance of subcooler is divided into two-way from the liquid refrigerants of main road outlet outflow, all the way into after the supercooling of main subcooler 82 Become low-pressure gaseous refrigerant after the heat absorption of main 82 bypass of subcooler through main 83 reducing pressure by regulating flow of throttling set and reaches cooling medium distributor 80 outlet；Refrigeration check valve 844 corresponding with the interior machine that freezes is passed through from the another way refrigerant of main road outlet outflow to enter in refrigeration Machine first flows through 92 reducing pressure by regulating flow of machine electric expansion valve in refrigeration, subsequently into 91 evaporation endothermic of indoor heat exchanger of machine in freezing After becoming low-pressure gaseous refrigerant, the outlet of cooling medium distributor 80 is reached through multiple refrigeration solenoid valves 842.

Further, cooling medium distributor 80 further includes auxiliary subcooler 85 and auxiliary throttling set 86, the master of auxiliary subcooler 85 Road is arranged between the liquid side outlet of the second gas-liquid separator 81 and the main road entrance of main subcooler 82, and auxiliary throttling set 86 is arranged Between the main road outlet of auxiliary subcooler 85 and the main road entrance of main subcooler 82, the bypass of auxiliary subcooler 85 is arranged in main supercooling The bypass of device 82 exports between the outlet of cooling medium distributor 80, as depicted in figs. 1 and 2.

Auxiliary subcooler 85 and auxiliary throttling set 86, Neng Goujin are set between the second gas-liquid separator 81 and main subcooler 82 One step improves the degree of supercooling of the liquid refrigerants of main 82 main road of subcooler output, to further increase the refrigerating capacity of system.

Wherein, main throttling set 83 and auxiliary throttling set 86 also primarily serve reducing pressure by regulating flow function, concrete form not by Limitation.Such as: it can only include a restricting element, also may include multiple restricting elements being in parallel, be also possible to throttle In parallel group of element and solenoid diverter valve (that is: playing the solenoid valve of shunting function, all refrigerants is avoided to enter restricting element) Close etc., it is also possible to other forms；And the form of restricting element is also unrestricted, for example capillary, electric expansion valve 92 etc. are equal Can be with, will not enumerate herein, due to that can realize reducing pressure by regulating flow function, and without be detached from design philosophy of the invention and Objective, thus all within the scope of the present invention, concrete form and quantity in the actual production process can be according to products Specific structure and demand are reasonably adjusted.

Embodiment two

Difference with embodiment one is: on the basis of example 1, further, cooling medium distributor 80 further includes Diverter branch 87, one end of diverter branch 87 be connected to heating check valve 843 outlet and the main road entrance of main subcooler 82 it Between arbitrary node, the other end of diverter branch 87 is connected to the outlet of cooling medium distributor 80, and diverter branch 87 is equipped with For controlling the third control valve 88 of its on-off, as shown in Figure 2.

Diverter branch 87 is additionally set in cooling medium distributor 80, and one end of diverter branch 87 is connected to heating unidirectionally Arbitrary node between the outlet of valve 843 and the main road entrance of main subcooler 82, the other end of diverter branch 87 are connected to refrigerant The outlet of distributor 80, in this way, being flowed out by heating check valve 843 the case where for pure heating operation and main heating operation Middle pressure two-phase refrigerant, only some enters main subcooler 82 and is subcooled, and another part refrigerant is then directly by shunting branch Road 87 reaches the outlet of cooling medium distributor 80, so as to press the pressure loss of two-phase refrigerant in reducing, improves and reaches flash distillation The pressure of the two-phase refrigerant of 50 inlet of device, and then the air injection enthalpy-increasing effect of compressor 10 is improved, further increase low-temperature heating Effect；Simultaneously, additionally it is possible to the noise of machine pipeline in reducing.Preferably, third control valve is solenoid valve.

Further, the quantity of diverter branch 87 is multiple, and multiple diverter branch 87 are in parallel, as shown in Figure 2.

The quantity of diverter branch 87 is multiple, and multiple diverter branch 87 are in parallel, and can be further reduced single by heating The middle pressure two-phase refrigerant flowed out to valve 843 enters the amount of main subcooler 82, so as to be further reduced middle pressure two-phase refrigerant The pressure loss further increases the pressure for reaching the two-phase refrigerant of 50 inlet of flash vessel, and then further increases compressor 10 Air injection enthalpy-increasing effect, further increase low-temperature heating effect.

Preferably, the quantity of diverter branch 87 is two, as shown in Fig. 2, the demand of air injection enthalpy-increasing had not only been met in this way, but also Simplify the pipe-line layout of product.

Wherein, when two pipes system heat-reclamation multi-compressors system is run with pure heating mode, two pipes system heat-reclamation multi-compressors system The aperture that the control system of system controls main throttling set 83 is adjusted to maximum, and controls third control valve 88 and diverter branch 87 is connected.

The aperture of the main throttling set 83 of cooling medium distributor 80 is adjusted to maximum, together by the case where for pure heating operation When control third control valve 88 diverter branch 87 is connected, not only reduce the cold medium flux into main subcooler 82 in this way, but also reduce By the pressure loss of the refrigerant of main subcooler 82, so that the pressure loss of middle pressure two-phase refrigerant is further reduced, into one Step improves the pressure for reaching the two-phase refrigerant of 50 inlet of flash vessel, and then further increases the air injection enthalpy-increasing effect of compressor 10 Fruit further increases low-temperature heating effect.

The two pipes system heat-reclamation multi-compressors system that the application is described in detail below with reference to specific embodiment shown in FIG. 1 exists The working principle of air injection enthalpy-increasing technology low-temperature heating is used under pure heating mode and main heating mode.

When heating, as shown in figure 3, the gas coolant of high temperature and pressure comes out from compressor, respectively (i.e. by solenoid valve SV6 Second control valve) and four-way valve ST1 and check valve DXF-15 (i.e. the 5th check valve) two-way pass through to high pressure valve, then from high pressure valve High-voltage tube A (i.e. refrigerant efferent duct) flows to MS entrance (i.e. cooling medium distributor entrance), into (second) gas-liquid separator, from (the second) outlet of gas-liquid separator gas side enters interior machine from tracheae by heating solenoid valve, and it is cold to be condensed into high-pressure liquid in interior machine After matchmaker, interior machine electric expansion valve is flowed through, high-pressure two-phase refrigerant is become, flows through restricting element (i.e. main throttling set, the aperture dimension of MS Standard-sized sheet is held, reduces resistance to the greatest extent) low-voltage tube B (i.e. cold media input tube) is returned to by low pressure valve into outer machine, two-phase refrigerant enters Flash vessel (by a mouthfuls enter) separation, liquid refrigerants from flash vessel liquid side outlet c come out after, pass through outer owner's restricting element EXVB (i.e. outdoor throttling set) becomes two phase refrigerant of low pressure and enters external heat exchanger heat absorption, then returns to low pressure by four-way valve ST1 Tank (i.e. the first gas-liquid separator), subsequently enters compressor return air mouth；Another part gaseous coolant passes through solenoid valve SV8 (i.e. First control valve) enter compressor compresses chamber.

When main heating, as shown in figure 5, the gas coolant of high temperature and pressure comes out from compressor, by passing through solenoid valve respectively SV6 (i.e. the second control valve) and four-way valve ST1 and check valve DXF-15 (i.e. the 5th check valve) two-way are to high pressure valve, then from high pressure Valve flows to MS entrance (i.e. the entrance of cooling medium distributor) by high-voltage tube A (i.e. refrigerant efferent duct), into (second) gas-liquid point From device.High-pressure gaseous refrigerant enters machine in heating from tracheae by heating solenoid valve from the outlet of (second) gas-liquid separator gas side, Condensed high pressure liquid refrigerant flows back to the second subcooler of MS entrance after interior machine electric expansion valve, and (i.e. main subcooler main road enters Mouthful), become high-pressure liquid refrigerant after coming out from the second subcooler (i.e. main subcooler main road) by refrigeration check valve and enters refrigeration Interior machine becomes middle pressure two-phase refrigerant into interior machine evaporation endothermic, after becoming middle pressure gaseous coolant after throttling by electric expansion valve Converge in low-voltage tube B (i.e. cold media input tube) with the two phase refrigerant of middle pressure flowed through from MS restricting element (i.e. main throttling set), Outer machine is returned to by low pressure valve；Enter outer a mouthfuls of machine flash vessel by check valve DXF-9 (i.e. the first check valve), is flashed from outer machine Device gas side exports the middle pressure refrigerant matchmaker of b outflow and enters compressor compresses chamber by solenoid valve SV8 (i.e. the first control valve), and in addition one Operative liquid refrigerant enters external heat exchanger evaporation by main restricting element (EXVA and SV1, i.e., outdoor throttling set) reducing pressure by regulating flow After heat exchange, passes through four-way valve ST1 and enter low-pressure tank (i.e. the first gas-liquid separator), be then return to compressor air suction mouth.

Further, enthalpy pressure figure as shown in connection with fig. 7 explains.Wherein, common to make under identical condition and frequency SAPMAC method are as follows: A-E '-F '-J '-A；The main road of the air injection enthalpy-increasing system with flash vessel of the application recycles are as follows: A-B-D-E-F-G- H-I-J-J '-A (main road circulation), spray enthalpy flow path circulation are as follows: C-D-E-F-G-H-C.

Specifically, the refrigerant state of flash vessel entrance is two phases, and as shown in H point, from the outlet of flash vessel gas side, b is discharged Gaseous coolant state point is C point, continues to compress after spraying into compressor compresses chamber；The liquid being discharged from flash vessel liquid side outlet c is cold Matchmaker's discharge state point is I point, and the state after outdoor throttling set (EXVB) reducing pressure by regulating flow is J point, is inhaled by outdoor heat exchanger Heat sucks compressor low pressure chamber after reaching superheat state A.From this figure, it can be seen that the spray enthalpy system with flash vessel can both increase (refrigerant that compressor is sprayed into from puff prot C is middle pressure refrigerant to refrigerant circulation, and the refrigerant density of density ratio gas returning port A point is big It is more, so that refrigerant circulation greatly increases), it improves external heat exchanger inlet and outlet enthalpy difference and improves caloric receptivity, while discharge superheat It reduces (SH < SH '), pressure ratio can be increased, compressor work is improved, to improve heating capacity.

To sum up, provided by the present invention for the air-conditioner outdoor unit of two pipes system heat-reclamation multi-compressors system, by using jet Enthalpy-increasing compressor technology simultaneously increases flash vessel and outdoor throttling set, increases air injection enthalpy-increasing flow path for air-conditioner outdoor unit, makes two Control heat-reclamation multi-compressors system increases heating air injection enthalpy-increasing function, to significantly increase two pipes system heat-reclamation multi-compressors system Refrigerant circulation when low-temperature heating of uniting is run, and then extend the model of two pipes system heat-reclamation multi-compressors system hypothermia heating operation It encloses, significantly improves the heating effect of two pipes system heat-reclamation multi-compressors system.

In the present invention, term " first ", " second ", " third " are only used for the purpose of description, and should not be understood as indicating Or imply relative importance；Term " multiple " then refers to two or more, unless otherwise restricted clearly.Term " installation ", The terms such as " connected ", " connection ", " fixation " shall be understood in a broad sense, for example, " connection " may be a fixed connection, being also possible to can Dismantling connection, or be integrally connected；" connected " can be directly connected, can also be indirectly connected through an intermediary.For this For the those of ordinary skill in field, the specific meanings of the above terms in the present invention can be understood according to specific conditions.

In description of the invention, it is to be understood that the instructions such as term " on ", "lower", "left", "right", "front", "rear" Orientation or positional relationship is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of the description present invention and simplification is retouched It states, rather than the device or unit of indication or suggestion meaning must have specific direction, be constructed and operated in a specific orientation, It is thus impossible to be interpreted as limitation of the present invention.

In the description of this specification, the description of term " one embodiment ", " some embodiments ", " specific embodiment " etc. Mean that particular features, structures, materials, or characteristics described in conjunction with this embodiment or example are contained at least one reality of the invention It applies in example or example.In the present specification, schematic expression of the above terms are not necessarily referring to identical embodiment or reality Example.Moreover, description particular features, structures, materials, or characteristics can in any one or more of the embodiments or examples with Suitable mode combines.

These are only the preferred embodiment of the present invention, is not intended to restrict the invention, for those skilled in the art For member, the invention may be variously modified and varied.All within the spirits and principles of the present invention, it is made it is any modification, Equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.

Claims (16)

1. a kind of air-conditioner outdoor unit is used for two pipes system heat-reclamation multi-compressors system, the two pipes system heat-reclamation multi-compressors system packet Include the cooling medium distributor of multiple air conditioner indoor unit and the connection air-conditioner outdoor unit and the multiple air conditioner indoor unit, feature It is, the air-conditioner outdoor unit includes:

Major cycle flow path, including air injection enthalpy-increasing compressor, reversing arrangement and the outdoor heat exchanger being connected by pipeline, and the master The both ends of circulation stream pass through the entrance and exit phase of refrigerant efferent duct and cold media input tube with the cooling medium distributor respectively Connection；With

Air injection enthalpy-increasing flow path, including flash vessel and outdoor throttling set, the entrance of the flash vessel by the first pipeline with it is described Cold media input tube is connected, and the gas side outlet of the flash vessel passes through the puff prot of the second pipeline and the air injection enthalpy-increasing compressor It is connected, the liquid side outlet of the flash vessel is connected by third pipeline with the input terminal of the outdoor heat exchanger, the outdoor section Device is flowed to be arranged on the third pipeline.

2. air-conditioner outdoor unit according to claim 1, which is characterized in that

Second pipeline is equipped with the first control valve that can control its on-off.

3. air-conditioner outdoor unit according to claim 2, which is characterized in that

First control valve is solenoid valve.

4. air-conditioner outdoor unit according to any one of claim 1 to 3, which is characterized in that

The first check valve is additionally provided on the third pipeline, first check valve is according to the liquid side outlet stream by the flash vessel To the direction one-way conduction of the input terminal of the outdoor heat exchanger.

5. air-conditioner outdoor unit according to claim 4, which is characterized in that

First check valve is located between the liquid side outlet of the flash vessel and the outdoor throttling set.

6. air-conditioner outdoor unit according to any one of claim 1 to 3, which is characterized in that

The outdoor throttling set includes a restricting element；Or

The outdoor throttling set includes multiple restricting elements being in parallel；Or

The outdoor throttling set includes at least one restricting element and solenoid diverter valve, at least one described restricting element and institute Solenoid diverter valve is stated to be in parallel.

7. air-conditioner outdoor unit according to any one of claim 1 to 3, which is characterized in that

The reversing arrangement includes four-way valve, second one-way valve, third check valve, the 4th check valve, the 5th check valve and the 6th The first port of check valve, the four-way valve is connected by the 4th pipeline with the exhaust outlet of the air injection enthalpy-increasing compressor, institute The second port for stating four-way valve passes through the input terminal and output end of the 5th pipeline and the 6th pipeline and the outdoor heat exchanger respectively It is connected, the third port of the four-way valve passes through the 7th pipeline and the 8th pipeline and the cold media input tube and the refrigerant respectively Efferent duct is connected, and the 4th port of the four-way valve is connected by the 9th pipeline with the gas returning port of the air injection enthalpy-increasing compressor Logical, the output end of the outdoor heat exchanger also passes through the tenth pipeline and is connected with the refrigerant efferent duct；

Wherein, the second one-way valve setting flows to the outdoor on the 5th pipeline, and according to by the second port The direction one-way conduction of the input terminal of heat exchanger；

The third check valve is arranged on the 6th pipeline, and according to described in the output end flow direction as the outdoor heat exchanger The direction one-way conduction of second port；

The 4th check valve setting flows to the third port on the 7th pipeline, and according to by the cold media input tube Direction one-way conduction；

The 5th check valve setting flows to the refrigerant efferent duct on the 8th pipeline, and according to by the third port Direction one-way conduction；

6th check valve is arranged on the tenth pipeline, and according to described in the output end flow direction as the outdoor heat exchanger The direction one-way conduction of refrigerant efferent duct.

8. air-conditioner outdoor unit according to claim 7, which is characterized in that

The outlet of the second one-way valve is located between the outdoor throttling set and the input terminal of the outdoor heat exchanger.

9. air-conditioner outdoor unit according to claim 7, which is characterized in that

The first gas-liquid separator is additionally provided on 9th pipeline.

10. air-conditioner outdoor unit according to claim 7, which is characterized in that

The reversing arrangement further includes the second control valve, the both ends of second control valve respectively with the exhaust outlet and described cold Matchmaker's efferent duct is connected, and second control valve is in close state under pure refrigeration mode.

11. a kind of two pipes system heat-reclamation multi-compressors system characterized by comprising

Air-conditioner outdoor unit as described in any one of claims 1 to 10；

Multiple air conditioner indoor unit, multiple air conditioner indoor unit are in parallel；

Cooling medium distributor is arranged between the air-conditioner outdoor unit and the multiple air conditioner indoor unit, for connecting the sky Outdoor unit and the multiple air conditioner indoor unit are adjusted, and the refrigerant for passing in and out multiple air conditioner indoor unit is allocated.

12. two pipes system heat-reclamation multi-compressors system according to claim 11, which is characterized in that

The cooling medium distributor includes the second gas-liquid separator being connected by pipeline, main subcooler, main throttling set, multiple Refrigeration check valve, multiple heating check valves, multiple refrigeration solenoid valves and multiple heating solenoid valves；

Wherein, the entrance of second gas-liquid separator is connected with the entrance of the coolant distributor device, second gas The liquid side outlet of liquid/gas separator is by the main road entrance of piping connection to the main subcooler, and the main throttling set setting is in institute It states between the main road outlet of main subcooler and the bypass entrance of the main subcooler, the bypass outlet of the main subcooler passes through pipe Road is connected to the outlet of the cooling medium distributor；

The gas side of second gas-liquid separator, which is exported, is respectively connected to multiple air-conditionings by multiple heating solenoid valves The first end of indoor unit, the second end of multiple air conditioner indoor unit pass through respectively multiple heating check valves be connected to it is described The main road entrance of main subcooler, and multiple heating check valves flow to institute according to the second end by multiple air conditioner indoor unit State the direction one-way conduction of the main road entrance of main subcooler；

The main road of the main subcooler, which is exported, is respectively connected to multiple air conditioner indoor unit by multiple refrigeration check valves Second end, and it is multiple it is described refrigeration check valve according to by the main subcooler main road outlet flow in multiple air conditioning chambers The direction one-way conduction of the second end of machine；The first end of multiple air conditioner indoor unit passes through multiple refrigeration solenoid valves respectively It is connected to the outlet of the cooling medium distributor.

13. two pipes system heat-reclamation multi-compressors system according to claim 12, which is characterized in that

The cooling medium distributor further includes diverter branch, and one end of the diverter branch is connected to going out for the heating check valve Arbitrary node between mouth and the main road entrance of the main subcooler, the other end of the diverter branch are connected to the refrigerant point Outlet with device, and the diverter branch is equipped with the third control valve for controlling its on-off.

14. two pipes system heat-reclamation multi-compressors system according to claim 13, which is characterized in that

The quantity of the diverter branch be it is multiple, multiple diverter branch are in parallel.

15. two pipes system heat-reclamation multi-compressors system according to claim 13, which is characterized in that

When the two pipes system heat-reclamation multi-compressors system is run with pure heating mode, the two pipes system heat-reclamation multi-compressors system Control system control the aperture of the main throttling set and be adjusted to maximum, and control the third control valve shuntings be connected and prop up Road.

16. two pipes system heat-reclamation multi-compressors system described in any one of 2 to 15 according to claim 1, which is characterized in that

The cooling medium distributor further includes auxiliary subcooler and auxiliary throttling set, and the main road setting of the auxiliary subcooler is described the Between the liquid side outlet of two gas-liquid separators and the main road entrance of the main subcooler, the auxiliary throttling set is arranged described auxiliary The main road of subcooler exports between the main road entrance of the main subcooler, and the bypass of the auxiliary subcooler is arranged in the main mistake The bypass of cooler exports between the outlet of the cooling medium distributor.