CN106403347B - Low-temperature air-conditioning system and air-conditioning - Google Patents

Low-temperature air-conditioning system and air-conditioning Download PDF

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Publication number
CN106403347B
CN106403347B CN201611046316.XA CN201611046316A CN106403347B CN 106403347 B CN106403347 B CN 106403347B CN 201611046316 A CN201611046316 A CN 201611046316A CN 106403347 B CN106403347 B CN 106403347B
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China
Prior art keywords
valve
heat exchanger
port
refrigerant
separator
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CN106403347A (en
Inventor
王新利
许永锋
熊美兵
冯明坤
李�根
赵浩伟
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Midea Group Co Ltd
Guangdong Midea HVAC Equipment Co Ltd
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Midea Group Co Ltd
Guangdong Midea HVAC Equipment Co Ltd
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B13/00Compression machines, plants or systems, with reversible cycle
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00Fluid-circulation arrangements
    • F25B41/40Fluid line arrangements
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B43/00Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
    • F25B43/003Filters

Abstract

The present invention provides a kind of low-temperature air-conditioning system and air-conditionings, wherein, a kind of low-temperature air-conditioning system, it include: compressor, four-way valve, indoor heat exchanger, outdoor heat exchanger and throttling set, first valve port of four-way valve is connected with compressor, and the second valve port of four-way valve is connected with indoor heat exchanger, and the third valve port of four-way valve is connected with outdoor heat exchanger, further include: supplementary heat exchanger is connected with outdoor heat exchanger;The first of first separator, the first separator is connected with supplementary heat exchanger, and second mouthful of the first separator is connected with indoor heat exchanger, and the third mouth of the first separator is connected with outdoor heat exchanger, and third mouth is in parallel with second mouthful, is connected to indoor heat exchanger;First valve, on the pipeline of the third valve port of the second port and four-way valve of connection outdoor heat exchanger;Second valve, on the pipeline of the third port of connection third mouth and indoor heat exchanger.According to the technical solution of the present invention, the internal circulating load of refrigerant can be controlled, the effect of air-conditioning system low-temperature heating is enhanced.

Description

Low-temperature air-conditioning system and air-conditioning
Technical field
The present invention relates to fields of home appliance technology, in particular to a kind of low-temperature air-conditioning system and a kind of air-conditioning.
Background technique
With the improvement of people ' s living standards with the enhancing of awareness of saving energy, for air-conditioning with its energy conservation, control is flexibly, easy to install The features such as with maintenance, vast average family is come into, and have been more and more widely used.However, under low-temperature condition, due to Evaporating temperature is relatively low, and evaporator is easy factors, the heats for causing refrigerant to absorb from air such as frosting and substantially reduces, heating effect Fruit is deteriorated, and influences the using effect of user, often results in the complaint of client.
Therefore, a kind of low-temperature air-conditioning system how is designed, the internal circulating load of refrigerant can be controlled, meanwhile, it improves low boiling and clicks through Enter the constituent content of evaporator, and then improve evaporability of the heat exchanger under extremely low environment temperature, enhances air-conditioning system low temperature The effect of heating becomes technical problem urgently to be resolved.
Summary of the invention
The present invention is directed to solve at least one of the technical problems existing in the prior art or related technologies.
For this purpose, an object of the present invention is to provide a kind of low-temperature air-conditioning systems.
It is another object of the present invention to propose a kind of air-conditioning.
To achieve the above object, technical solution according to the first aspect of the invention proposes a kind of low-temperature air-conditioning system, It include: compressor, four-way valve, indoor heat exchanger, outdoor heat exchanger and throttling set, the first valve port and the compressor phase of four-way valve Even, the second valve port of four-way valve is connected with indoor heat exchanger, and the third valve port of four-way valve is connected with outdoor heat exchanger, further includes: Supplementary heat exchanger is connected with outdoor heat exchanger;The first of first separator, the first separator is connected with supplementary heat exchanger, the Second mouthful of one separator is connected with indoor heat exchanger, and the third mouth of the first separator is connected with outdoor heat exchanger, third mouth with Second mouthful of parallel connection, is connected to indoor heat exchanger;First valve, set on the second port of connection outdoor heat exchanger and the third of four-way valve On the pipeline of valve port;Second valve, on the pipeline of the third port of connection third mouth and indoor heat exchanger.
Low-temperature air-conditioning system according to the technique and scheme of the present invention can be controlled cold in pipeline by the first valve and the second valve The internal circulating load size of matchmaker, and then the effect of air-conditioning system high-efficiency operation in a variety of contexts is realized, the first separator is in weight Being automatically separated for gas and liquid is realized under the action of power, effectively increases the constituent content that gaseous coolant enters evaporator, into And evaporability of the heat exchanger under extremely low environment temperature is improved, enhance the effect of air-conditioning system low-temperature heating.
The low-temperature air-conditioning system of above-mentioned technical proposal according to the present invention can also have following technical characteristic:
Above-mentioned technical proposal according to the present invention, it is preferable that further include: the second separator, the entrance of the second separator and four 4th valve port of port valve is connected, and the outlet of the second separator is connected with the air inlet of compressor, refrigerant by four-way valve the 4th valve Mouth flows through the second separator, flow in compressor.
In the technical scheme, mixing refrigerant enters the second separator, after the separation of the second separator, by liquid refrigerants Discharge prevents compressor sucking liquid refrigerants and damages, and the gaseous coolant after separation flow to compressor, improves the spray of compressor Gas enthalpy-increasing effect, and then improve the service life of compressor.
Above-mentioned technical proposal according to the present invention, it is preferable that supplementary heat exchanger includes: condensation part and evaporation part, wherein cold Solidifying portion includes: first interface, and first interface is connected with the first port of outdoor heat exchanger;And second interface, second interface with The first of first separator is connected;Evaporation part includes: first entrance, and first entrance is connected with the third mouth of the first separator, First entrance is connected with the second port of outdoor heat exchanger;And first outlet, the 4th valve port phase of first outlet and four-way valve Even.
In the technical scheme, the evaporation part of supplementary heat exchanger can make the liquid refrigerants evaporation endothermic for flowing to evaporation part, The condensation part of supplementary heat exchanger can make to flow to the condensation heat release of condensation part gaseous coolant, meanwhile, the refrigerant of condensation part and evaporation part Refrigerant can exchange heat, and then improve the heating effect of air-conditioning.
Above-mentioned technical proposal according to the present invention, it is preferable that further include: third valve is set to connection first outlet and four-way On the pipeline of 4th valve port of valve, or on the pipeline of connection first entrance and the 4th valve port of four-way valve;First pipeline, even The first interface of logical condensation part and the first port of outdoor heat exchanger, refrigerant pass through the in cooling mode, by outdoor heat exchanger One pipeline flow to the condensation part of supplementary heat exchanger, and refrigerant passes through the first pipe in a heating mode, by the condensation part of supplementary heat exchanger Road flow to outdoor heat exchanger;Wherein, third valve includes: guide electromagnetic valve, direct-acting electromagnetic valve, electrical ball valve, electric butterfly valve.
In the technical scheme, third valve can control flow velocity, direction and the pressure of pipeline, and third valve is set to auxiliary heat-exchanging The first outlet or first access point of device evaporation part, can control whether refrigerant enters supplementary heat exchanger evaporation part, Yi Jishi The no refrigerant isolated with the first separator is mixed, and low-temperature air-conditioning system is made to reach better heat transfer effect.Refrigeration cycle When, refrigerant flow to the condensation part of supplementary heat exchanger by the first pipeline from outdoor heat exchanger, into supplementary heat exchanger after further Supercooling improves the degree of supercooling of primary flow path refrigerant, to improve the exchange capability of heat of entire air-conditioning system.When heating circulation, refrigerant is logical The condensation part for crossing supplementary heat exchanger flow to outdoor heat exchanger by the first pipeline, and refrigerant passes through outdoor heat exchanger evaporation endothermic, becomes At the gaseous coolant of low-temp low-pressure.
Above-mentioned technical proposal according to the present invention, it is preferable that further include: first throttling device is set on the first pipeline, control Freeze flow velocity and pressure of the matchmaker in the first pipeline;Second throttling device, on the third mouth of the first separator, control is from the The flow velocity and pressure of the refrigerant of three mouthfuls of outflows, refrigerant are flowed out from third mouth, flow into room by third port through second throttling device Interior heat exchanger, or mixed through second throttling device with the refrigerant that the second port of outdoor heat exchanger flows out, it is changed by auxiliary The evaporation part of hot device and four-way valve flow to the second separator.
In the technical scheme, when refrigerant flow to supplementary heat exchanger by outdoor heat exchanger, by first throttling device, become The refrigerant of medium temperature and medium pressure can make supplementary heat exchanger that preferably refrigerant further be subcooled.It can be adjusted by second throttling device Save the flow velocity and pressure of the refrigerant flowed out from the first separator.
Above-mentioned technical proposal according to the present invention, it is preferable that further include: control device is connected with four-way valve, with first segment Stream device is connected with second throttling device, is connected with the first valve and the second valve and third valve.
In the technical scheme, control device can change the connection direction of four-way valve, in conjunction with first throttling device and Two throttling sets, can pressure, flow velocity and direction to refrigerant controlled well.Control device can also control first The folding size of valve, the second valve and third valve, and then air-conditioning system is enable to work in a variety of contexts, improve air-conditioning system Operational efficiency.
Above-mentioned technical proposal according to the present invention, it is preferable that control device further include: be in heating in low-temperature air-conditioning system Under mode, the first valve port of control is connected to the second valve port, and the 4th valve port is connected to third valve port, and the first valve and the second valve are closed, Third valve is opened, and refrigerant can flow in the first separator by compressor through four-way valve and indoor heat exchanger, can also will be by the The refrigerant of three mouthfuls of outflows is mixed with the refrigerant that outdoor heat exchanger flows out, and the evaporation part through supplementary heat exchanger passes through third valve stream It is returned in compressor to the second separator;And in the case where low-temperature air-conditioning system is in refrigeration mode, the first valve port and third are controlled Valve port connection, the 4th valve port are connected to the second valve port, and the first valve and the second valve are opened, and third valve is closed, and refrigerant can be by compressor It flow in the first separator through four-way valve and outdoor heat exchanger, the refrigerant flowed out by third mouth and second mouthful can also be flowed out Refrigerant is mixed into indoor heat exchanger, to flow to the second separator by four-way valve again.
In the technical scheme, under heating mode, the first valve port of four-way valve and the second valve port are connected, the 4th valve port and third Valve port connection, the first valve and the second valve are closed, and third valve is opened, and compressor air-discharging enters four-way valve from the first valve port, then from The outflow of second valve port reaches indoor heat exchanger and condenses heat release, enters the first separator by second mouthful of the first separator later, Gas is automatically separated with liquid realization under gravity, and liquid refrigerants send to second throttling device and throttles, subsequently into auxiliary Help the evaporation part channel for heat exchange of heat exchanger, liquid refrigerants evaporation endothermic;Another way gaseous coolant enters from the first separator top The condensation part of supplementary heat exchanger exchanges heat with the refrigerant of evaporation part, further condenses, increases cryogenic fluid in first throttle Degree of supercooling before device throttling, facilitates the refrigerating capacity of increase system.After first throttling device throttles, into outdoor heat exchange Device evaporation endothermic becomes the gaseous coolant of low-temp low-pressure, assists with entering after the refrigerant that second throttling device throttles mixes The evaporation part evaporation endothermic of heat exchanger finally flows back to compressor from supplementary heat exchanger evaporation part by four-way valve, and completion entirely follows Ring.
Under refrigeration mode, third valve is closed, and the first valve and the second valve are opened, and the first valve port of four-way valve and third valve port connect Logical, the 4th valve port be connected to the second valve port, and compressor air-discharging passes through the first valve port and enters four-way valve, then pass through third valve port into Enter outdoor heat exchanger condensation heat release, is then passed through after first throttle control device tentatively throttle, becomes the middle refrigerant for pressing medium temperature, into Enter the condensation part of supplementary heat exchanger, further condenses, increase the degree of supercooling that refrigerant fluid enters the room heat exchanger, facilitate The refrigerating capacity of increase system.Refrigerant enters the first separator later, and gas is automatically separated with liquid realization under gravity, Wherein, liquid refrigerants is mixed by the second valve and the another road refrigerant from the first separator after second throttling device throttles Conjunction enters the room heat exchanger, passes through the second separator after reaching indoor heat exchanger evaporation endothermic, returns to the suction line of compressor, Complete refrigeration cycle.
Any of the above-described a technical solution according to the present invention, it is preferable that refrigerant includes: that the different refrigerant of a variety of boiling points is mixed Mixed non-azeotropic refrigerant made of conjunction.
In the technical scheme, mixed non-azeotropic refrigerant does not have azeotropic point, and when level pressure is evaporated, temperature constantly changes by low It is slid to height;Level pressure is then exactly the opposite when condensing.Therefore, condensation process cooling water is continually changing, using this characteristic, is subtracted The heat transfer irreversible loss of small condenser and evaporator is improved the efficiency of refrigeration cycle.
Any of the above-described a technical solution according to the present invention, it is preferable that throttling set includes: electromagnetic type expansion valve, electronic Formula expansion valve;First valve includes: guide electromagnetic valve, direct-acting electromagnetic valve, electrical ball valve, electric butterfly valve;Second valve includes: elder generation Guide electromagnetic valve, direct-acting electromagnetic valve, electrical ball valve, electric butterfly valve.
In the technical scheme, by the way that throttling set is selected as electromagnetic type expansion valve or electrodynamic type expansion valve, Ke Yishi Existing condensing pressure controls the flow of refrigerant to the throttling of evaporating pressure, to reach to the coolant throttle decompression in pipeline, by the One valve and the second valve are selected as guide electromagnetic valve, direct-acting electromagnetic valve, electrical ball valve, electric butterfly valve, can be made according to different With the type of environment flexible choice valve body, to realize optimal low-temperature treatment effect.
A kind of air-conditioning that the technical solution of second aspect of the present invention provides includes any one technology of first aspect present invention The low-temperature air-conditioning system that scheme provides, therefore the air-conditioning has the whole of the low-temperature air-conditioning system of any of the above-described a technical solution offer Beneficial effect, details are not described herein.
Additional aspect and advantage of the invention will be set forth in part in the description, and will partially become from the following description Obviously, or practice through the invention is recognized.
Detailed description of the invention
Fig. 1 shows a low-temperature air-conditioning system schematic diagram of embodiment according to the present invention;
Fig. 2 shows another low-temperature air-conditioning system schematic diagrames of embodiment according to the present invention.
100 low-temperature air-conditioning systems, 102 compressors, 104 four-way valves, 106 indoor heat exchangers, 108 outdoor heat exchangers, 110 One separator, 112 supplementary heat exchangers, 114 second separators, 116 first pipelines, 120 first throttling devices, 122 second throttlings Device, 124 first valves, 126 second valves, 128 third valves, the first valve port of a, the second valve port of b, c third valve port, the 4th valve port of d, e First, second mouthful of f, g third mouth.
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 limited to following public affairs The limitation for the specific embodiment opened.
It is specifically described below with reference to low-temperature air-conditioning system 100 of the Fig. 1 to embodiment according to the present invention.
As shown in Figure 1, the low-temperature air-conditioning system 100 of embodiment according to the present invention includes: compressor 102, four-way valve 104, indoor heat exchanger 106, outdoor heat exchanger 108 and throttling set, the first valve port a and 102 phase of compressor of four-way valve 104 Even, the second valve port b of four-way valve 104 is connected with indoor heat exchanger 106, the third valve port c and outdoor heat exchanger of four-way valve 104 108 are connected, further includes: supplementary heat exchanger 112 is connected with outdoor heat exchanger 108;First separator 110, the first separator 110 First e be connected with supplementary heat exchanger 112, second mouthful of e of the first separator 110 is connected with indoor heat exchanger 106, first point Third mouth g from device 110 is connected with outdoor heat exchanger 108, and third mouth g is in parallel with second mouthful of f, is connected to indoor heat exchanger 106; First valve 124, on the pipeline of the third valve port c of the second port and four-way valve 104 of connection outdoor heat exchanger 108;Second Valve 126, on the pipeline of the third port of connection third mouth g and indoor heat exchanger 106.
The low-temperature air-conditioning system 100 of embodiment according to the present invention can be controlled by the first valve 124 and the second valve 126 The internal circulating load size of refrigerant in pipeline, and then the effect of air-conditioning system high-efficiency operation in a variety of contexts is realized, first point It realizes being automatically separated for gas and liquid under gravity from device 110, effectively increases gaseous coolant and enter evaporator Constituent content, and then evaporability of the heat exchanger under extremely low environment temperature is improved, enhance air-conditioning system low-temperature heating Effect.
Low-temperature air-conditioning system 100 according to the abovementioned embodiments of the present invention, can also have following technical characteristic:
According to that above embodiment of the present invention, it is preferable that further include: the second separator 114, the entrance of the second separator 114 Be connected with the 4th valve port d of four-way valve 104, the outlet of the second separator 114 is connected with the air inlet of compressor 102, refrigerant by 4th valve port d of four-way valve 104 flows through the second separator 114, flow in compressor 102.
In this embodiment, mixing refrigerant enters the second separator 114, after the separation of the second separator 114, by liquid Refrigerant discharge, prevents compressor 102 from sucking liquid refrigerants and damaging, the gaseous coolant after separation flow to compressor 102, improves The air injection enthalpy-increasing effect of compressor 102, and then improve the service life of compressor 102.
According to that above embodiment of the present invention, it is preferable that supplementary heat exchanger 112 includes: condensation part and evaporation part, wherein Condensation part includes: first interface, and first interface is connected with the first port of outdoor heat exchanger 108;And second interface, second connects Mouth is connected with the first of the first separator 110;Evaporation part includes: first entrance, and the of first entrance and the first separator 110 Three mouthfuls are connected, and first entrance is connected with the second port of outdoor heat exchanger 108;And first outlet, first outlet and four-way valve 104 the 4th valve port is connected.
In this embodiment, the evaporation part of supplementary heat exchanger 112 can make the liquid refrigerants evaporation endothermic for flowing to evaporation part, The condensation part of supplementary heat exchanger 112 can make to flow to the condensation heat release of condensation part gaseous coolant, meanwhile, the refrigerant of condensation part and evaporation The refrigerant in portion can exchange heat, and then improve the heating effect of air-conditioning.
According to one embodiment of present invention, it is preferable that further include: third valve 128 is set to connection first outlet and four-way On the pipeline of 4th valve port d of valve 104, or on the pipeline of connection first entrance and the 4th valve port d of four-way valve 104;The One pipeline 116, is connected to the first interface of condensation part and the first port of outdoor heat exchanger 108, refrigerant in cooling mode, by room External heat exchanger 108 flow to the condensation part of supplementary heat exchanger 112 by the first pipeline 116, and refrigerant in a heating mode, is changed by auxiliary The condensation part of hot device 112 flow to outdoor heat exchanger 108 by the first pipeline 116;Wherein, third valve 128 includes: guide type electromagnetic Valve, direct-acting electromagnetic valve, electrical ball valve, electric butterfly valve.
In this embodiment, third valve 128 can control flow velocity, direction and the pressure of pipeline, and third valve is set to auxiliary and changes At the first outlet of hot 112 right side evaporation part of device or the first population, it can control whether refrigerant enters supplementary heat exchanger evaporation Portion, and the refrigerant whether isolated with the first separator 110 are mixed, and low-temperature air-conditioning system is made to reach preferably heat exchange effect Fruit.When refrigeration cycle, refrigerant flow to the condensation part of supplementary heat exchanger 112 by the first pipeline 116 from outdoor heat exchanger 108, into It is further subcooled after entering supplementary heat exchanger 112, the degree of supercooling of primary flow path refrigerant is improved, to improve the heat exchange of entire air-conditioning system Ability.When heating circulation, refrigerant flow to outdoor heat exchanger by the first pipeline 116 by the condensation part of supplementary heat exchanger 112 108, refrigerant passes through 108 evaporation endothermic of outdoor heat exchanger, becomes the gaseous coolant of low-temp low-pressure.
According to one embodiment of present invention, it is preferable that further include: first throttling device 120 is set to the first pipeline 116 On, control flow velocity and pressure of the refrigerant in the first pipeline 116;Second throttling device 122, set on the of the first separator 110 On three mouthfuls of g, the flow velocity and pressure from the third mouth g refrigerant flowed out are controlled, refrigerant is flowed out from third mouth g, through second throttling device 122 flow into indoor heat exchanger 106, or the second port through second throttling device 122 Yu outdoor heat exchanger 108 by third port The refrigerant of outflow is mixed, and flow to the second separator 114 by the evaporation part and four-way valve 104 of supplementary heat exchanger 112.
In this embodiment, when refrigerant flow to supplementary heat exchanger 112 by outdoor heat exchanger 108, pass through first throttling device 120, become the refrigerant of medium temperature and medium pressure, can make supplementary heat exchanger 112 that preferably refrigerant further be subcooled.Pass through the second throttling The flow velocity and pressure of the adjustable refrigerant flowed out from the first separator 110 of device 122.
According to the abovementioned embodiments of the present invention, it is preferable that further include: control device is connected with four-way valve 104, with first Throttling set 120 is connected with second throttling device 122, is connected with the first valve 124 and the second valve 126 and third valve 128.
In this embodiment, control device can change the connection direction of four-way valve 104, in conjunction with first throttling device 120 With second throttling device 122, can pressure, flow velocity and direction to refrigerant controlled well.Control device can be with The folding size of the first valve 124, the second valve 126 and third valve 128 is controlled, and then enables air-conditioning system work in a variety of contexts Make, improves the operational efficiency of air-conditioning system.
According to the abovementioned embodiments of the present invention, it is preferable that control device further include: be in heating mould in low-temperature air-conditioning system Under formula, the first valve port a of control is connected to the second valve port b, and the 4th valve port d is connected to third valve port c, the first valve 124 and the second valve 126 close, and third valve 128 is opened, and refrigerant can flow to first through four-way valve 104 and indoor heat exchanger 106 by compressor 102 In separator 110, the refrigerant flowed out by third mouth g can also be mixed with the refrigerant that outdoor heat exchanger 108 flows out, through assisting The evaporation part of heat exchanger 112 flow to the second separator 114 by third valve 128 and returns in compressor 102;And in low-temperature air conditioner Under system is in refrigeration mode, the first valve port a of control is connected to third valve port c, and the 4th valve port d is connected to the second valve port b, and first Valve 124 and the second valve 126 are opened, and third valve 128 is closed, and refrigerant can be by compressor 102 through four-way valve 104 and outdoor heat exchanger 108 flow in the first separator 110, can also be mixed into the refrigerant flowed out by third mouth g with second mouthful of f refrigerant flowed out and enter the room Interior heat exchanger 106, to flow to the second separator 114 by four-way valve 104 again.
In this embodiment, under heating mode, four-way valve 104 first valve port a and the second valve port b connect, the 4th valve port d with Third valve port c connection, the first valve 124 and the second valve 126 are closed, and third valve 128 is opened, and compressor 102 is vented from the first valve port a It into four-way valve 104, is then flowed out from the second valve port b, reaches indoor heat exchanger 106 and condense heat release, later by the first separation Second mouthful of f of device 110 enters the first separator 110, and gas is automatically separated with liquid realization under gravity, liquid refrigerants It send to second throttling device 122 and throttles, subsequently into the evaporation part channel for heat exchange of supplementary heat exchanger 112, liquid refrigerants evaporation is inhaled Heat;Another way gaseous coolant enters the condensation part of supplementary heat exchanger 112, the refrigerant with evaporation part from 110 top of the first separator Heat is exchanged, is further condensed, degree of supercooling of the cryogenic fluid before the throttling of first throttling device 120 is increased, helps to increase The refrigerating capacity of system.After the throttling of first throttling device 120, into 108 evaporation endothermic of outdoor heat exchanger, become low-temp low-pressure Gaseous coolant, with after the refrigerant that second throttling device 122 throttles mixes enter supplementary heat exchanger 112 evaporation part evaporate Heat absorption finally flows back to compressor 102 from 112 evaporation part of supplementary heat exchanger by four-way valve 104, completes entire circulation.
Under refrigeration mode, third valve 128 is closed, and the first valve 124 and the second valve 126 are opened, 104 first valve port a of four-way valve It is connected to third valve port c, the 4th valve port d is connected to the second valve port b, and compressor air-discharging enters four-way valve by the first valve port a 104, outdoor heat exchanger 108 is then entered by third valve port c and condenses heat release, at the beginning of being then passed through first throttle control device 120 After step throttling, the refrigerant for becoming middle pressure medium temperature further condenses into the condensation part of supplementary heat exchanger 112, increases refrigerant Fluid enters the room the degree of supercooling of heat exchanger 106, facilitates the refrigerating capacity of increase system.Refrigerant enters the first separator later 110, gas is automatically separated with liquid realization under gravity, wherein liquid refrigerants throttles by second throttling device 122 Afterwards, indoor heat exchanger 106 is mixed into the another road refrigerant from the first separator 110 by the second valve 126, reached indoor By the second separator 114 after 106 evaporation endothermic of heat exchanger, the suction line of compressor 102 is returned to, completes refrigeration cycle.
According to the abovementioned embodiments of the present invention, it is preferable that refrigerant includes: that the different refrigerant of a variety of boiling points mixes Mixed non-azeotropic refrigerant.
In this embodiment, mixed non-azeotropic refrigerant does not have an azeotropic point, when level pressure is evaporated, temperature constantly change by as low as Height sliding;Level pressure is then exactly the opposite when condensing.Using this characteristic, condensation process cooling water is continually changing, evaporation process Cooled object temperature is that the alternating temperature feature that constantly reduces is adapted, reduce it is covert during heat transfer temperature difference, reduced The irreversible loss of journey, and then the heat transfer irreversible loss for reducing condenser and evaporator enables the efficiency of refrigeration cycle to mention It is high.When the temperature difference between evaporating temperature and cooled object temperature, condensation temperature and surrounding medium temperature is smaller, refrigeration cycle Efficiency is higher.
Any of the above-described a embodiment according to the present invention, it is preferable that throttling set includes: electromagnetic type expansion valve, electrodynamic type Expansion valve;First valve 124 includes: guide electromagnetic valve, direct-acting electromagnetic valve, electrical ball valve, electric butterfly valve;Second valve 126 packet It includes: guide electromagnetic valve, direct-acting electromagnetic valve, electrical ball valve, electric butterfly valve.
In this embodiment, it by the way that throttling set is selected as electromagnetic type expansion valve or electrodynamic type expansion valve, may be implemented Condensing pressure controls the flow of refrigerant, to reach to the coolant throttle decompression in pipeline, by first to the throttling of evaporating pressure Valve 124 and the second valve 126 are selected as guide electromagnetic valve, direct-acting electromagnetic valve, electrical ball valve, electric butterfly valve, can be according to difference Use environment flexible choice valve body type, to realize optimal low-temperature treatment effect.
Embodiment one:
As shown in Figure 1, user opens air-conditioning when winter it is cold, air-conditioning is transferred under heating mode, at this time the first valve 124 and second valve 126 close, third valve 128 is opened, and the first valve port a and the second valve port b are connected, the 4th valve port d and third valve port C connection, mixed working fluid enter four-way valve 104 by the first valve port a after the compression of compressor 102, then flow from the second valve port b Out, it reaches indoor heat exchanger 106 and condenses heat release, wherein high boiling component is largely condensed into liquid, and low boiling working fluid is still Remain gaseous state.Pass through the first separator 110 later, gas is automatically separated with liquid realization under gravity, is isolated The higher boiling liquid refrigerants come is by second throttling device throttling, subsequently into the evaporation part channel for heat exchange of supplementary heat exchanger 112, Liquid refrigerants evaporation endothermic;Another way gaseous coolant enters the condensation part of supplementary heat exchanger 112 from 110 top of the first separator, Heat is exchanged with the refrigerant of evaporation part, is further condensed, supercooling of the cryogenic fluid before the throttling of first throttling device 120 is increased Degree, facilitates the refrigerating capacity of increase system.After the throttling of first throttling device 120, evaporates and inhale into outdoor heat exchanger 108 Heat becomes the gaseous coolant of low-temp low-pressure, with after the refrigerant that second throttling device 122 throttles mixes enter supplementary heat exchanger 112 evaporation part evaporation endothermic finally flows back to compressor 102 from 112 evaporation part of supplementary heat exchanger by four-way valve 104, completes Entire circulation.
Third valve 128 is closed if being adjusted under refrigeration mode, the first valve 124 and the second valve 126 are opened, and are exchanged heat Circulation.
As shown in Fig. 2, third valve may be located on the first access point of supplementary heat exchanger evaporation part.
Wherein, it according to different environmental conditions, the openings of sizes of the adjustable throttle valve of control device, and then can control The flow velocity of refrigerant, direction and pressure in pipeline.
A kind of air-conditioning that the embodiment of second aspect of the present invention provides includes any one embodiment of first aspect present invention The air-conditioning system of offer, therefore the air-conditioning has whole beneficial effects of the air-conditioning system of any of the above-described a embodiment offer, herein It repeats no more.
The technical scheme of the present invention has been explained in detail above with reference to the attached drawings, the invention proposes a kind of low-temperature air-conditioning system, The internal circulating load size of refrigerant in pipeline can be controlled by the first valve and the second valve, and then realizes air-conditioning system in a variety of environment The effect of lower high-efficiency operation effectively increases low boiling point and enters evaporation using the Component Separation Performance of Ternary of non-azeotropic mixed working medium The constituent content of device improves evaporability of the heat exchanger under more low ambient temperature, so as to improve air-conditioning system low temperature capability Insufficient problem enhances the ability of air-conditioning system low-temperature heating.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.

Claims (10)

1. a kind of low-temperature air-conditioning system (100), comprising: compressor (102), four-way valve (104), indoor heat exchanger (106), outdoor First valve port (a) of heat exchanger (108) and throttling set, the four-way valve (104) is connected with the compressor (102), described Second valve port (b) of four-way valve (104) is connected with the indoor heat exchanger (106), the third valve port of the four-way valve (104) (c) it is connected with the outdoor heat exchanger (108), which is characterized in that further include:
Supplementary heat exchanger (112) is connected with the outdoor heat exchanger (108);
The first (e) of first separator (110), first separator (110) is connected with the supplementary heat exchanger (112), Second mouthful (f) of first separator (110) is connected with the indoor heat exchanger (106), first separator (110) Third mouth (g) is connected with the outdoor heat exchanger (108), and the third mouth (g) is in parallel with second mouthful (f), with the room Interior heat exchanger (106) connection;
First valve (124) is set to the of the second port and the four-way valve (104) for being connected to the outdoor heat exchanger (106) On the pipeline of three valve ports (c);
Second valve (126) is set on the pipeline for the third port for being connected to the third mouth (g) and the indoor heat exchanger (106).
2. low-temperature air-conditioning system (100) according to claim 1, which is characterized in that further include:
Second separator (114), the 4th valve port (d) phase of the entrance and the four-way valve (104) of second separator (114) Even, the outlet of second separator (114) is connected with the air inlet of the compressor (102), and refrigerant is by the four-way valve (104) the 4th valve port (d) flows through second separator (114), flow in the compressor (102).
3. low-temperature air-conditioning system (100) according to claim 2, which is characterized in that supplementary heat exchanger (112) packet It includes: condensation part and evaporation part, wherein
The condensation part includes: first interface, and the first interface is connected with the first port of the outdoor heat exchanger (108); And second interface, the second interface are connected with the first (e) of first separator (110);
The evaporation part includes: first entrance, third mouth (g) phase of the first entrance and first separator (110) Even, the first entrance is connected with the second port of the outdoor heat exchanger (108);And first outlet, described first Outlet is connected with the 4th valve port (d) of the four-way valve (104).
4. low-temperature air-conditioning system according to claim 3, which is characterized in that further include:
Third valve (128) is set on the pipeline for being connected to the 4th valve port (d) of the first outlet and the four-way valve (104), or On the pipeline of the 4th valve port (d) for being connected to the first entrance and the four-way valve (104);
First pipeline (116) is connected to the first interface of the condensation part and the first port of the outdoor heat exchanger (108), cold Matchmaker flow to the supplementary heat exchanger by first pipeline (116) in cooling mode, by the outdoor heat exchanger (108) (112) condensation part, the refrigerant pass through described first in a heating mode, by the condensation part of the supplementary heat exchanger (112) Pipeline (116) flow to the outdoor heat exchanger (108);
Wherein, the third valve (128) includes: guide electromagnetic valve, direct-acting electromagnetic valve, electrical ball valve, electric butterfly valve.
5. low-temperature air-conditioning system (100) according to claim 4, which is characterized in that further include:
First throttling device (120) is set on first pipeline (116), controls the refrigerant in first pipeline (116) Interior flow velocity and pressure;
Second throttling device (122) is set on the third mouth (g) of first separator (110), is controlled from the third The flow velocity and pressure of the refrigerant of mouth (g) outflow, the refrigerant are flowed out from the third mouth (g), are filled through second throttling It sets (122) and the indoor heat exchanger (106) is flowed by the third port, or through the second throttling device (122) and institute The refrigerant for stating the second port outflow of outdoor heat exchanger (108) is mixed, and is passed through the supplementary heat exchanger (112) Evaporation part and the four-way valve (104) flow to second separator (114).
6. low-temperature air-conditioning system (100) according to claim 5, which is characterized in that further include:
Control device is connected with the four-way valve (104), with the first throttling device (120) and the second throttling device (122) it is connected, is connected with first valve (124) and second valve (126) and the third valve (128).
7. low-temperature air-conditioning system (100) according to claim 6, which is characterized in that the control device further include:
In the case where the low-temperature air-conditioning system is in heating mode, first valve port (a) and second valve port (b) are controlled even Logical, the 4th valve port (d) is connected to the third valve port (c), and first valve (124) and second valve (126) are closed, The third valve (128) is opened, and the refrigerant can be by the compressor (102) through the four-way valve (104) and the interior Heat exchanger (106) flows in first separator (110), can also will by the third mouth (g) flow out the refrigerant with The refrigerant of outdoor heat exchanger (108) outflow is mixed, and the evaporation part through the supplementary heat exchanger (112) passes through institute Third valve (128) is stated to flow in the second separator (114) return compressor (102);And
In the case where the low-temperature air-conditioning system is in refrigeration mode, first valve port (a) and the third valve port (c) are controlled even Logical, the 4th valve port (d) is connected to second valve port (b), and first valve (124) and second valve (126) are opened, The third valve (128) is closed, and the refrigerant can be by the compressor (102) through the four-way valve (104) and the outdoor Heat exchanger (108) is flow in first separator (110), can also be by the refrigerant by the third mouth (g) outflow and institute The refrigerant for stating second mouthful (f) outflow is mixed into the indoor heat exchanger (106), to be flowed again by the four-way valve (104) To second separator (114).
8. the low-temperature air-conditioning system according to any one of claim 2 to 7 (100), which is characterized in that
The refrigerant is: the mixed non-azeotropic refrigerant that the different refrigerant of a variety of boiling points mixes.
9. low-temperature air-conditioning system (100) according to any one of claim 1 to 7, which is characterized in that
The throttling set is: electromagnetic type expansion valve or electrodynamic type expansion valve;
First valve (124) is: guide electromagnetic valve, direct-acting electromagnetic valve, electrical ball valve, in four kinds of valve bodies of electric butterfly valve Any valve body;
Second valve (126) is: guide electromagnetic valve, direct-acting electromagnetic valve, electrical ball valve, in four kinds of valve bodies of electric butterfly valve Any valve body.
10. a kind of air-conditioning, which is characterized in that including low-temperature air-conditioning system described in any one of claims 1 to 9 (100).
CN201611046316.XA 2016-11-22 2016-11-22 Low-temperature air-conditioning system and air-conditioning Active CN106403347B (en)

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CN107178925A (en) * 2017-06-12 2017-09-19 广东美的暖通设备有限公司 Air-conditioning system and air-conditioning
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CN102042724A (en) * 2009-10-13 2011-05-04 珠海格力电器股份有限公司 Refrigerant control unit, air conditioner refrigeration system and refrigerant cycle control methods
CN201757533U (en) * 2010-05-31 2011-03-09 西安交通大学 Self-cascade heat pump with intermediate throttling element

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