CN107388650B - Air-conditioning system and gas-liquid separator hydrops control method - Google Patents

Air-conditioning system and gas-liquid separator hydrops control method Download PDF

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Publication number
CN107388650B
CN107388650B CN201710616138.8A CN201710616138A CN107388650B CN 107388650 B CN107388650 B CN 107388650B CN 201710616138 A CN201710616138 A CN 201710616138A CN 107388650 B CN107388650 B CN 107388650B
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gas
refrigerant
hydrops
liquid separator
heat exchanger
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CN107388650A (en
Inventor
林锐源
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Gree Electric Appliances Inc of Zhuhai
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Gree Electric Appliances Inc of Zhuhai
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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
    • F25B43/00Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
    • 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
    • F25B49/00Arrangement or mounting of control or safety devices
    • F25B49/02Arrangement or mounting of control or safety devices for compression type machines, plant or systems
    • 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
    • F25B2500/00Problems to be solved
    • F25B2500/23High amount of refrigerant in the system
    • 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
    • F25B2500/00Problems to be solved
    • F25B2500/28Means for preventing liquid refrigerant entering into the compressor
    • 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
    • F25B2600/00Control issues
    • F25B2600/05Refrigerant levels
    • 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
    • F25B2700/00Sensing or detecting of parameters; Sensors therefor
    • F25B2700/04Refrigerant level

Abstract

The present invention relates to a kind of air-conditioning system and gas-liquid separator hydrops control methods, air-conditioning system includes: indoor set heat exchanger (4), compressor (1) and gas-liquid separator (3), on the refrigerant flow that the gas-liquid separator (3) is arranged between the air entry of the compressor (1) and the refrigerant exit of the indoor set heat exchanger (4), refrigerant circulation mechanism is additionally provided between the gas-liquid separator (3) and the indoor set heat exchanger (4), for in process of refrigerastion, when determining in the gas-liquid separator (3) there are refrigerant hydrops and refrigerant hydrops is more than default refrigerant hydrops amount, refrigerant hydrops in the gas-liquid separator (3) is directed in the indoor set heat exchanger (4) and is evaporated.The hydrops problem of gas-liquid separator when the present invention can efficiently solve air-conditioning system refrigeration.

Description

Air-conditioning system and gas-liquid separator hydrops control method
Technical field
The present invention relates to air-conditioning technical more particularly to a kind of air-conditioning system and gas-liquid separator hydrops control methods.
Background technique
Within air-conditioning systems, the effect of gas-liquid separator is usually the air entry progress gas-liquid separation in gas compressor. It, may be in gas-liquid separator if the refrigerant for entering gas-liquid separator is unable to evaporating completely when air-conditioning system is run A certain amount of hydrops is generated, and hydrops further causes operation coolant quantity in air-conditioning system to reduce, so that air-conditioning system is difficult to Preferably performance is played, the refrigerating capacity of air-conditioning system is influenced;If hydrops is excessive in gas-liquid separator, it is also possible to compressor Breathing process be inhaled into, cause the serious consequence of compressor liquid hammer.
Currently, existing air-conditioning system still lacks the effective scheme of gas-liquid separator hydrops when solving the problems, such as refrigeration.
Summary of the invention
The purpose of the present invention is to propose to a kind of air-conditioning system and gas-liquid separator hydrops control methods, are able to solve air-conditioning system The hydrops problem of gas-liquid separator when controlling is cold.
To achieve the above object, the present invention provides a kind of air-conditioning systems, comprising: indoor set heat exchanger, compressor are gentle Liquid/gas separator, the gas-liquid separator be arranged in the compressor air entry and the indoor set heat exchanger refrigerant exit it Between refrigerant flow on, which is characterized in that be additionally provided with refrigerant between the gas-liquid separator and the indoor set heat exchanger and follow Ring mechanism, in process of refrigerastion, when determining in the gas-liquid separator there are refrigerant hydrops and refrigerant hydrops is more than default When refrigerant hydrops amount, the refrigerant hydrops in the gas-liquid separator is directed in the indoor set heat exchanger and is evaporated.
Further, the refrigerant circulation mechanism includes the first refrigerant pipeline and the second refrigerant pipeline, first refrigerant One end of pipeline is connected to the gas-liquid separator, and communicating position be located at the default hydrops liquid level of the gas-liquid separator with Under, the other end of first refrigerant pipeline is connected to the liquid pipe of the indoor set heat exchanger, the second refrigerant pipeline difference It is connected to the tracheae of the gas-liquid separator and the indoor set heat exchanger.
Further, refrigerant pump is equipped in first refrigerant pipeline, for by the refrigerant in the gas-liquid separator Hydrops is pumped into the liquid pipe of the indoor set heat exchanger along first refrigerant pipeline.
Further, in the liquid pipe of the intake line and output pipe of the gas-liquid separator, the indoor set heat exchanger Be equipped with the first valve on tracheae, first valve can by the refrigerant hydrops in the gas-liquid separator to the room It is turned off before interior machine heat exchanger guidance, is equipped with the second valve in first refrigerant pipeline and second refrigerant pipeline, Second valve can be opened before guiding the refrigerant hydrops in the gas-liquid separator to the indoor set heat exchanger.
It further, further include hydrops detection control mechanism, for detecting in the gas-liquid separator with the presence or absence of refrigerant Whether the refrigerant hydrops in hydrops and the gas-liquid separator is more than default refrigerant hydrops amount, and to the refrigerant circulation machine Structure is controlled.
Further, the hydrops detection control mechanism includes:
Temperature detecting unit, for detecting the temperature value of each temperature sampling point in the air-conditioning system;
Pressure sensing cell, for detecting the pressure value of each force samples point in the air-conditioning system;
Control unit is communicated to connect with the temperature detecting unit and pressure sensing cell, for according to the temperature detected Angle value and/or pressure value judge the refrigerant hydrops presence or absence in the gas-liquid separator, the number of refrigerant hydrops amount and variation, And each valve in the refrigerant circulation mechanism is controlled.
Further, described control unit includes:
First condition judges control module, for meeting T at the same timeGas goes out-TGas into≤B、TExhaust>=C and PPressFirst of≤D When part, confirm in the gas-liquid separator there are refrigerant hydrops and refrigerant hydrops is more than default refrigerant hydrops amount, and described in controlling Refrigerant hydrops in the gas-liquid separator is directed in the indoor set heat exchanger and is evaporated by refrigerant circulation mechanism, so as to Hydrops, which is switched to, from normal refrigerating state removes state;
Wherein, TGas goes outFor the temperature value of the gaseous coolant of gas-liquid separator discharge, TGas intoTo enter the gas-liquid separation The temperature value of the gaseous coolant of device, TExhaustFor the outlet air temperature of the compressor, PPressFor the exhaust pressure value of the compressor, B is first temperature threshold of the range at -3~-1 DEG C, and C is second temperature threshold value of the range at 90~100 DEG C, and D is range 1.9 The first pressure threshold value of~2.5MPa.
Further, described control unit further include:
Second condition judges control module, for meeting TGas goes out-TGas intoWhen the second condition of >=A, the gas-liquid point is determined From device it is not necessary that refrigerant hydrops is discharged, and the refrigerant circulation mechanism is not triggered, to maintain normal refrigerating state;
Third condition judges control module, in the refrigerant circulation mechanism that the refrigerant in the gas-liquid separator is long-pending Liquid is directed to be evaporated in the indoor set heat exchanger during, when meeting TEnter pipeWhen the third condition of >=E, described in confirmation Refrigerant hydrops in gas-liquid separator has been eliminated, and is controlled the refrigerant circulation mechanism and be restored to normal refrigerating state;
Wherein, TEnter pipeFor into the temperature value of the refrigerant of the indoor set heat exchanger, A is third temperature of the range at 1~3 DEG C Threshold value is spent, E is fourth temperature threshold of the range at 18~22 DEG C.
To achieve the above object, the gas-liquid separator hydrops control based on air-conditioning system above-mentioned that the present invention provides a kind of Method, comprising:
In process of refrigerastion, judge in the gas-liquid separator with the presence or absence of refrigerant hydrops, and refrigerant hydrops whether be more than Default refrigerant hydrops amount;
If it is determined that then will in the gas-liquid separator there are refrigerant hydrops and refrigerant hydrops is more than default refrigerant hydrops amount Refrigerant hydrops in the gas-liquid separator, which is directed in the indoor set heat exchanger, to be evaporated.
Further, whether there is refrigerant hydrops in the judgement gas-liquid separator, and refrigerant hydrops whether be more than The operation of default refrigerant hydrops amount specifically includes:
According to each in the temperature value of each temperature sampling point in the air-conditioning system detected and/or the air-conditioning system The pressure value that force samples are selected judges the refrigerant hydrops presence or absence in the gas-liquid separator, the number of refrigerant hydrops amount and change Change.
Further, it is determined that there are refrigerant hydrops and refrigerant hydrops is more than default refrigerant hydrops amount in the gas-liquid separator First condition are as follows: while meeting TGas goes out-TGas into≤B、TExhaust>=C and PPress≤ D, when meeting the first condition, described in control Refrigerant hydrops in the gas-liquid separator is directed in the indoor set heat exchanger and is evaporated by refrigerant circulation mechanism, so as to Hydrops, which is switched to, from normal refrigerating state removes state;
Wherein, TGas goes outFor the temperature value of the gaseous coolant of gas-liquid separator discharge, TGas intoTo enter the gas-liquid separation The temperature value of the gaseous coolant of device, TExhaustFor the outlet air temperature of the compressor, PPressFor the exhaust pressure value of the compressor, B is first temperature threshold of the range at -3~-1 DEG C, and C is second temperature threshold value of the range at 90~100 DEG C, and D is range 1.9 The first pressure threshold value of~2.5MPa.
Further, it is determined that being not necessarily to that the second condition of refrigerant hydrops is discharged in the gas-liquid separator are as follows: meet TGas goes out-TGas into >=A does not trigger the refrigerant circulation mechanism when meeting the second condition, to maintain normal refrigerating state;Wherein, A is model It is trapped among 1~3 DEG C of third temperature threshold.
Further, the refrigerant hydrops in the gas-liquid separator is directed to the interior in the refrigerant circulation mechanism During being evaporated in machine heat exchanger, the third condition that the refrigerant hydrops in the gas-liquid separator has been eliminated is confirmed are as follows: Meet TEnter pipe>=E controls the refrigerant circulation mechanism and is restored to normal refrigerating state when meeting the third condition;Wherein, TEnter pipeFor into the temperature value of the refrigerant of the indoor set heat exchanger, E is fourth temperature threshold of the range at 18~22 DEG C.
Based on the above-mentioned technical proposal, the present invention between gas-liquid separator and indoor set heat exchanger by being arranged refrigerant circulation Mechanism, and in process of refrigerastion, when determining that existing refrigerant hydrops is more than default refrigerant hydrops amount in gas-liquid separator, by gas Refrigerant hydrops in liquid/gas separator, which is directed in indoor set heat exchanger, to be evaporated, and is effectively eliminated gas-liquid separator in this way A possibility that interior hydrops enables air-conditioning system to play more preferably performance, reduces compressor liquid hammer;And pass through refrigerant product The liquid evaporation in machine heat exchanger indoors absorbs environment temperature, obtains indoor refrigeration effect, and then utilize the part hydrops Save refrigeration energy consumption.
Detailed description of the invention
The drawings described herein are used to provide a further understanding of the present invention, constitutes part of this application, this hair Bright illustrative embodiments and their description are used to explain the present invention, and are not constituted improper limitations of the present invention.In the accompanying drawings:
Fig. 1 is the schematic illustration of an embodiment of air-conditioning system of the present invention.
Specific embodiment
Below by drawings and examples, technical scheme of the present invention will be described in further detail.
As shown in Figure 1, the schematic illustration of the embodiment for air-conditioning system of the present invention.In the present embodiment, air-conditioning system System includes: indoor set heat exchanger 4, compressor 1 and gas-liquid separator 3.Gas-liquid separator 3 be arranged in the air entry of compressor 1 with On refrigerant flow between the refrigerant exit of indoor set heat exchanger 4.It can be between gas-liquid separator 3 and indoor set heat exchanger 4 Refrigerant circulation mechanism is further set, which is used in process of refrigerastion, when determining that there are refrigerants in the gas-liquid separator 3 Hydrops and refrigerant hydrops are more than that when presetting refrigerant hydrops amount, the refrigerant hydrops in the gas-liquid separator 3 is directed to the room It is evaporated in interior machine heat exchanger 4.
The present embodiment was being freezed by the way that refrigerant circulation mechanism is arranged between gas-liquid separator and indoor set heat exchanger Cheng Zhong will be cold in gas-liquid separator when determining that existing refrigerant hydrops is more than default refrigerant hydrops amount in gas-liquid separator Matchmaker's hydrops, which is directed in indoor set heat exchanger, to be evaporated, the hydrops being effectively eliminated in gas-liquid separator in this way, so that A possibility that air-conditioning system can play more preferably performance, reduce compressor liquid hammer;And machine changes indoors by refrigerant hydrops Evaporation in hot device absorbs environment temperature, obtains indoor refrigeration effect, and then save refrigeration consumption using the part hydrops Energy.
It should be noted that the air-conditioning system of the embodiment of the present invention can also include other function component, such as setting exists Outdoor simultaneously carries out the outdoor unit heat exchanger 2 of condensation reduction, to high-temperature gas refrigerant in process of refrigerastion for realizing cooling and warming The four-way valve 5 of switching and restricting element (not shown) etc., no longer repeat one by one here.
With reference to Fig. 1, refrigerant circulation mechanism includes the first refrigerant pipeline f1 and the second refrigerant pipeline f2, the first refrigerant pipeline f1 One end be connected to gas-liquid separator 3, and communicating position is located at the default hydrops liquid level of gas-liquid separator 3 hereinafter, first is cold The other end of matchmaker's pipeline f1 is connected to the liquid pipe a of indoor set heat exchanger 4.Second refrigerant pipeline f2 respectively with gas-liquid separator 3 and The tracheae b of indoor set heat exchanger 4 is connected to.Refrigerant hydrops in gas-liquid separator 3 can enter room along the first refrigerant pipeline f1 Interior machine heat exchanger 4, and gaseous coolant is evaporated in machine heat exchanger 4 indoors, then gas-liquid point is flowed back to by the second refrigerant pipeline f2 From device 3, to realize the refrigerant circulation between gas-liquid separator 3 and indoor set heat exchanger 4.In addition, by the first refrigerant pipeline f1 The default hydrops liquid level of gas-liquid separator 3 is set hereinafter, refrigerant can be effectively discharged with the communicating position of gas-liquid separator 3 Hydrops reduces the hydrops amount remained in gas-liquid separator 3.
In order to enable gas-liquid separator 3 that refrigerant hydrops faster and is more smoothly discharged into indoor set heat exchanger 4, preferably exist Refrigerant pump 10 is set in first refrigerant pipeline f1, it is using the refrigerant pump 10 that the refrigerant hydrops in gas-liquid separator 3 is cold along first Matchmaker's pipeline f1 is pumped into the liquid pipe a of indoor set heat exchanger 4.Refrigerant pump 10 can needed the refrigerant hydrops in gas-liquid separator 3 It is directed to unlatching when being evaporated in indoor set heat exchanger 4, does not need closing when guidance.
It, can be by compressor 1 when needing to be discharged using the refrigerant hydrops in refrigerant circulation mechanism guides gas-liquid separator 3 And the fan of outdoor unit heat exchanger 2 is closed, and reduces energy consumption, and the normal refrigerating cycle of air-conditioning system is switched to gas-liquid separation Partial circulating between device 3 and indoor set heat exchanger 4, the handoff procedure between this different circulations can be used valve control come it is real It is existing.Specifically, the intake line and output pipe of gas-liquid separator 3, indoor set heat exchanger 4 liquid pipe a and tracheae b on can Be respectively provided with the first valve, that is, the first valve 72,71 being located on the intake line and output pipe of gas-liquid separator 3, with And it is located at the first valve 73,74 on the liquid pipe a and tracheae b of indoor set heat exchanger 4.These first valves can be by gas Refrigerant hydrops in liquid/gas separator 3 turns off before to the guidance of indoor set heat exchanger 4, and in the first refrigerant pipeline f1 and the second refrigerant The second valve is equipped in pipeline f2, that is, be located at the first refrigerant pipeline f1 and the second refrigerant pipeline f2 the second valve 61, 62, the second valve 61,62 can be opened before guiding the refrigerant hydrops in gas-liquid separator 3 to indoor set heat exchanger 4.The Solenoid valve can be used with the control instruction of reception control unit, in another embodiment, first in one valve and the second valve Valve and the second valve can also use other control forms, such as manually control or stroke control etc..
There is no refrigerant hydrops or refrigerant hydrops to be less than default refrigerant product in normal process of refrigerastion, in gas-liquid separator 3 Liquid measure, the first valve maintains open state at this time, and the second valve maintains closed state.On the other hand, from gas-liquid separation During refrigerant hydrops is discharged to indoor set heat exchanger 4 in device 3, if detect in gas-liquid separator 3 there is no refrigerant hydrops or When person's refrigerant hydrops is less than default refrigerant hydrops amount, then the first valve can be switched back into open state from closed state, and incite somebody to action Second valve switches back into closed state from open state.
In order to realize the detection and automatic control of hydrops in gas-liquid separator, product can be further comprised within air-conditioning systems Liquid detects control mechanism, for detecting in gas-liquid separator 3 with the presence or absence of the refrigerant in refrigerant hydrops and gas-liquid separator 3 Whether hydrops is more than default refrigerant hydrops amount, and is controlled refrigerant circulation mechanism.Specifically, hydrops detects control mechanism It may include: temperature detecting unit, pressure sensing cell and control unit.Temperature detecting unit is for detecting in air-conditioning system The temperature value of each temperature sampling point, it is gentle that the gas that example is separately positioned on gas-liquid separator as shown in figure 1 separates pipe (i.e. output pipe) Being divided into the gas of pipe (i.e. intake line), to go out temperature sensing package 81 gentle into temperature sensing package 83, and the exhaust on the exhaust outlet of compressor 1 is arranged in The liquid of machine heat exchanger is divided into pipe and (i.e. enters pipe temperature sensing package 84 on liquid pipe a) indoors for temperature sensing package 82 and setting.Pressure detecting list The pressure on the exhaust outlet of compressor 1 is arranged in for detecting the pressure value of each force samples point in air-conditioning system, example in member as shown in figure 1 Force snesor 9.
Control unit and temperature detecting unit and pressure sensing cell communicate to connect, for according to the temperature value detected And/or pressure value judges the refrigerant hydrops presence or absence in gas-liquid separator 3, the number of refrigerant hydrops amount and variation, and to cold Each valve in matchmaker's circulation mechanism controls.Control unit specifically includes:
First condition judges control module, for meeting T at the same timeGas goes out-TGas into≤B、TExhaust>=C and PPressWhen the condition of≤D, Confirm in gas-liquid separator 3 there are refrigerant hydrops and refrigerant hydrops is more than default refrigerant hydrops amount, and controls refrigerant circulation mechanism Refrigerant hydrops in gas-liquid separator 3 is directed in indoor set heat exchanger 4 and is evaporated, to switch from normal refrigerating state State is removed to hydrops;
Wherein, TGas goes outFor the temperature value for the gaseous coolant that gas-liquid separator 3 is discharged, TGas intoFor the gas for entering gas-liquid separator 3 The temperature value of state refrigerant, TExhaustFor the outlet air temperature of compressor 1, PPressFor the exhaust pressure value of compressor 1, B is range -3 ~-1 DEG C of the first temperature threshold, C are second temperature threshold value of the range at 90~100 DEG C, and D is range 1.9~2.5MPa's First pressure threshold value.
Here T is usedGas goes out-TGas into≤B、TExhaust>=C and PPress≤ D is to investigate to when in gas-liquid separator to deposit as first condition After a certain amount of refrigerant hydrops, liquid refrigerants can be evaporated heat absorption in gas-liquid separator, so that the gas of gas-liquid separator The temperature for separating pipe decreases below gas and divides temperature a certain range of inlet pipe, and the inspiratory capacity for also resulting in compressor reduces, To keep delivery temperature higher, pressure at expulsion is smaller, therefore can definitely be recognized by the investigation to these Parameters variations Whether the hydrops situation of gas-liquid separator is serious.
In addition control unit can further include: second condition judges control module and third condition judgement control mould Block.Second condition judges control module for meeting TGas goes out-TGas intoWhen the condition of >=A, determine that gas-liquid separator 3 is cold without being discharged Matchmaker's hydrops, and refrigerant circulation mechanism is not triggered, to maintain normal refrigerating state.Third condition judges control module in refrigerant Refrigerant hydrops in gas-liquid separator 3 is directed to by circulation mechanism be evaporated in indoor set heat exchanger 4 during, work as satisfaction TEnter pipeWhen >=E, confirm that the refrigerant hydrops in gas-liquid separator 3 has been eliminated, and controls refrigerant circulation mechanism and be restored to normal refrigeration shape State.Wherein, TEnter pipeFor enter the room machine heat exchanger 4 refrigerant temperature value, A be third temperature threshold of the range at 1~3 DEG C, E The 4th temperature threshold for range at 18~22 DEG C.
Here T is usedGas goes out-TGas into>=A is to investigate to not depositing refrigerant hydrops in the gas-liquid separator as second condition, or Refrigerant hydrops amount is less when being unlikely to cause adverse effect, and there is no liquid refrigerants, and heat absorption can be evaporated in gas-liquid separator Process, therefore be not in that the gas of gas-liquid separator separates the situation that the temperature of pipe divides the temperature of inlet pipe lower than gas, thus Without triggering refrigerant circulation mechanism when meeting the second condition, and continue to keep normal refrigerating state.Using TEnter pipe>=E makees It for third condition is investigated to when there is no hydrops in gas-liquid separator or only a small amount of hydrops is discharged, then enters indoor unit The predominantly higher gaseous coolant of temperature of heat exchanger, indoor set heat exchanger is also unable to reach the effect of refrigeration at this time, therefore can To determine that hydrops is drained according to the raising for entering tube temperature degree of indoor set heat exchanger, and controls refrigerant circulation mechanism and be restored to just Normal refrigerating state.
Machine heat exchanger carries out in the evaporation process of refrigerant hydrops indoors, in addition to the control of aforementioned first valve and the second valve Except system, the blower of refrigerant pump and indoor set heat exchanger can be opened, to promote its evaporation process, while by compressor and room The blower of outer machine heat exchanger is closed, with energy saving;And after the outlet for terminating refrigerant hydrops, refrigerant pump can be closed, and will The blower of compressor and outdoor unit heat exchanger is opened.
Based on the embodiment of above-mentioned each air-conditioning system, the present invention also provides corresponding gas-liquid separator hydrops controlling parties Method, comprising:
In process of refrigerastion, judge in the gas-liquid separator 3 with the presence or absence of refrigerant hydrops, and refrigerant hydrops whether be more than Default refrigerant hydrops amount;
If it is determined that there are refrigerant hydrops and refrigerant hydrops is more than default refrigerant hydrops amount in the gas-liquid separator 3, then Refrigerant hydrops in the gas-liquid separator 3 is directed in the indoor set heat exchanger 4 and is evaporated.
In the above-described embodiments, judge in the gas-liquid separator 3 with the presence or absence of refrigerant hydrops, and whether refrigerant hydrops surpasses The operation for crossing default refrigerant hydrops amount specifically includes:
According to each in the temperature value of each temperature sampling point in the air-conditioning system detected and/or the air-conditioning system The pressure value that force samples are selected judges the refrigerant hydrops presence or absence in the gas-liquid separator 3, the number of refrigerant hydrops amount and Variation.
In above-mentioned judgment step, it is related to the judgement of multiple conditions, wherein determining that there are cold in the gas-liquid separator 3 Matchmaker's hydrops and refrigerant hydrops are more than the first condition of default refrigerant hydrops amount can be with are as follows: while meeting TGas goes out-TGas into≤B、TExhaust≥C And PPress≤D.When meeting the first condition, the refrigerant circulation mechanism is controlled by the refrigerant product in the gas-liquid separator 3 Liquid is directed in the indoor set heat exchanger 4 and is evaporated, and removes state to be switched to hydrops from normal refrigerating state;Its In, TGas goes outFor the temperature value of the gaseous coolant of the gas-liquid separator 3 discharge, TGas intoFor the gaseous state for entering the gas-liquid separator 3 The temperature value of refrigerant, TExhaustFor the outlet air temperature of the compressor 1, PPressFor the exhaust pressure value of the compressor 1, B is model It is trapped among -3~-1 DEG C of the first temperature threshold, C is second temperature threshold value of the range at 90~100 DEG C, D is range 1.9~ The first pressure threshold value of 2.5MPa.
Determining can be with it is not necessary that the second condition of refrigerant hydrops is discharged in the gas-liquid separator 3 are as follows: meets TGas goes out-TGas into≥A。 When meeting the second condition, the refrigerant circulation mechanism is not triggered, to maintain normal refrigerating state;Wherein, A is that range exists 1~3 DEG C of third temperature threshold.The refrigerant hydrops in the gas-liquid separator 3 is directed to institute in the refrigerant circulation mechanism State the third for confirming that the refrigerant hydrops in the gas-liquid separator 3 has been eliminated during being evaporated in indoor set heat exchanger 4 Condition can be with are as follows: meets TEnter pipe≥E.When meeting the third condition, controls the refrigerant circulation mechanism and be restored to normal refrigeration State;Wherein, TEnter pipeFor into the temperature value of the refrigerant of the indoor set heat exchanger 4, E is fourth temperature of the range at 18~22 DEG C Spend threshold value.
Finally it should be noted that: the above embodiments are merely illustrative of the technical scheme of the present invention and are not intended to be limiting thereof;To the greatest extent The present invention is described in detail with reference to preferred embodiments for pipe, it should be understood by those ordinary skilled in the art that: still It can modify to a specific embodiment of the invention or some technical features can be equivalently replaced;Without departing from this hair The spirit of bright technical solution should all cover within the scope of the technical scheme claimed by the invention.

Claims (12)

1. a kind of air-conditioning system, comprising: indoor set heat exchanger (4), compressor (1) and gas-liquid separator (3), the gas-liquid separation The refrigerant flow that device (3) is arranged between the air entry of the compressor (1) and the refrigerant exit of the indoor set heat exchanger (4) On, which is characterized in that it is additionally provided with refrigerant circulation mechanism between the gas-liquid separator (3) and the indoor set heat exchanger (4), For in process of refrigerastion, when determining in the gas-liquid separator (3) there are refrigerant hydrops and refrigerant hydrops is more than default refrigerant When hydrops amount, the refrigerant hydrops in the gas-liquid separator (3) is directed in the indoor set heat exchanger (4) and is evaporated;
The refrigerant circulation mechanism includes the first refrigerant pipeline (f1) and the second refrigerant pipeline (f2), first refrigerant pipeline (f1) one end is connected to the gas-liquid separator (3), and communicating position is located at the default hydrops of the gas-liquid separator (3) Liquid level is described hereinafter, the other end of first refrigerant pipeline (f1) is connected to the liquid pipe (a) of the indoor set heat exchanger (4) Second refrigerant pipeline (f2) is connected to the tracheae (b) of the gas-liquid separator (3) and the indoor set heat exchanger (4) respectively.
2. air-conditioning system according to claim 1, which is characterized in that be equipped with refrigerant in first refrigerant pipeline (f1) It pumps (10), for the refrigerant hydrops in the gas-liquid separator (3) to be pumped into the interior along first refrigerant pipeline (f1) The liquid pipe (a) of machine heat exchanger (4).
3. air-conditioning system according to claim 1, which is characterized in that the gas-liquid separator (3) intake line and The first valve, the first valve energy are equipped on output pipe, the liquid pipe (a) of the indoor set heat exchanger (4) and tracheae (b) It is enough by the refrigerant hydrops in the gas-liquid separator (3) to turning off before the indoor set heat exchanger (4) guidance, described the It is equipped with the second valve in one refrigerant pipeline (f1) and second refrigerant pipeline (f2), second valve can be will be described Refrigerant hydrops in gas-liquid separator (3) is opened before to the indoor set heat exchanger (4) guidance.
4. air-conditioning system according to claim 1, which is characterized in that further include hydrops detection control mechanism, for detecting In the gas-liquid separator (3) with the presence or absence of the refrigerant hydrops in refrigerant hydrops and the gas-liquid separator (3) whether be more than Default refrigerant hydrops amount, and the refrigerant circulation mechanism is controlled.
5. air-conditioning system according to claim 4, which is characterized in that the hydrops detects control mechanism and includes:
Temperature detecting unit, for detecting the temperature value of each temperature sampling point in the air-conditioning system;
Pressure sensing cell, for detecting the pressure value of each force samples point in the air-conditioning system;
Control unit is communicated to connect with the temperature detecting unit and pressure sensing cell, for according to the temperature value detected And/or pressure value judges the refrigerant hydrops presence or absence in the gas-liquid separator (3), the number of refrigerant hydrops amount and variation, And each valve in the refrigerant circulation mechanism is controlled.
6. air-conditioning system according to claim 5, which is characterized in that described control unit includes:
First condition judges control module, for meeting T at the same timeGas goes out-TGas into≤B、TExhaust>=C and PPressWhen the first condition of≤D, Confirm in the gas-liquid separator (3) there are refrigerant hydrops and refrigerant hydrops is more than default refrigerant hydrops amount, and controls described cold Refrigerant hydrops in the gas-liquid separator (3) is directed in the indoor set heat exchanger (4) and is evaporated by matchmaker's circulation mechanism, State is removed to be switched to hydrops from normal refrigerating state;
Wherein, TGas goes outFor the temperature value of the gaseous coolant of the gas-liquid separator (3) discharge, TGas intoTo enter the gas-liquid separator (3) temperature value of gaseous coolant, TExhaustFor the outlet air temperature of the compressor (1), PPressFor the exhaust of the compressor (1) Pressure value, B are first temperature threshold of the range at -3~-1 DEG C, and C is second temperature threshold value of the range at 90~100 DEG C, and D is model It is trapped among the first pressure threshold value of 1.9~2.5MPa.
7. air-conditioning system according to claim 6, which is characterized in that described control unit further include:
Second condition judges control module, for meeting TGas goes out-TGas intoWhen the second condition of >=A, the gas-liquid separator is determined (3) it is not necessary that refrigerant hydrops is discharged, and the refrigerant circulation mechanism is not triggered, to maintain normal refrigerating state;
Third condition judges control module, in the refrigerant circulation mechanism that the refrigerant in the gas-liquid separator (3) is long-pending Liquid is directed to be evaporated in the indoor set heat exchanger (4) during, when meeting TEnter pipeWhen the third condition of >=E, institute is confirmed The refrigerant hydrops stated in gas-liquid separator (3) has been eliminated, and is controlled the refrigerant circulation mechanism and be restored to normal refrigerating state;
Wherein, TEnter pipeFor into the temperature value of the refrigerant of the indoor set heat exchanger (4), A is third temperature of the range at 1~3 DEG C Threshold value, E are fourth temperature threshold of the range at 18~22 DEG C.
8. a kind of gas-liquid separator hydrops control method based on any air-conditioning system of claim 1~7, feature exist In, comprising:
In process of refrigerastion, judge with the presence or absence of refrigerant hydrops in the gas-liquid separator (3), and whether refrigerant hydrops is more than pre- If refrigerant hydrops amount;
If it is determined that then will in the gas-liquid separator (3) there are refrigerant hydrops and refrigerant hydrops is more than default refrigerant hydrops amount Refrigerant hydrops in the gas-liquid separator (3), which is directed in the indoor set heat exchanger (4), to be evaporated.
9. gas-liquid separator hydrops control method according to claim 8, which is characterized in that the judgement gas-liquid point From whether there is refrigerant hydrops in device (3), and whether refrigerant hydrops is more than that the operation of default refrigerant hydrops amount specifically includes:
According to each pressure in the temperature value of each temperature sampling point in the air-conditioning system detected and/or the air-conditioning system The pressure value of sampled point judges the refrigerant hydrops presence or absence in the gas-liquid separator (3), the number of refrigerant hydrops amount and change Change.
10. gas-liquid separator hydrops control method according to claim 9, which is characterized in that determine the gas-liquid separation There are refrigerant hydrops and refrigerant hydrops is more than the first condition of default refrigerant hydrops amount in device (3) are as follows: while meeting TGas goes out-TGas into≤ B、TExhaust>=C and PPress≤ D controls the refrigerant circulation mechanism for the gas-liquid separator (3) when meeting the first condition Interior refrigerant hydrops is directed in the indoor set heat exchanger (4) and is evaporated, to be switched to hydrops from normal refrigerating state Removing state;
Wherein, TGas goes outFor the temperature value of the gaseous coolant of the gas-liquid separator (3) discharge, TGas intoTo enter the gas-liquid separator (3) temperature value of gaseous coolant, TExhaustFor the outlet air temperature of the compressor (1), PPressFor the exhaust of the compressor (1) Pressure value, B are first temperature threshold of the range at -3~-1 DEG C, and C is second temperature threshold value of the range at 90~100 DEG C, and D is model It is trapped among the first pressure threshold value of 1.9~2.5MPa.
11. gas-liquid separator hydrops control method according to claim 10, which is characterized in that determine the gas-liquid separation It is not necessarily to that the second condition of refrigerant hydrops is discharged in device (3) are as follows: meet TGas goes out-TGas into>=A is not touched when meeting the second condition Send out refrigerant circulation mechanism described, to maintain normal refrigerating state;Wherein, A is third temperature threshold of the range at 1~3 DEG C.
12. gas-liquid separator hydrops control method according to claim 10, which is characterized in that in the refrigerant circulation machine Refrigerant hydrops in the gas-liquid separator (3) is directed to by structure be evaporated in the indoor set heat exchanger (4) during, Confirm the third condition that the refrigerant hydrops in the gas-liquid separator (3) has been eliminated are as follows: meet TEnter pipe>=E is meeting the third When condition, controls the refrigerant circulation mechanism and be restored to normal refrigerating state;Wherein, TEnter pipeTo enter the indoor set heat exchanger (4) temperature value of refrigerant, E are fourth temperature threshold of the range at 18~22 DEG C.
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CN109028451B (en) * 2018-05-24 2019-09-17 珠海格力电器股份有限公司 Method, apparatus, computer equipment and the storage medium of gas-liquid separation
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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06201234A (en) * 1993-01-07 1994-07-19 Hitachi Ltd Air-conditioner
JP2004309029A (en) * 2003-04-08 2004-11-04 Matsushita Electric Ind Co Ltd Refrigerating cycle device
US6857287B1 (en) * 1999-09-16 2005-02-22 Altech Controls Corporation Refrigeration cycle
CN104729130A (en) * 2013-12-24 2015-06-24 珠海格力电器股份有限公司 Air conditioning system and control method thereof
DE102014102830A1 (en) * 2014-03-04 2015-09-10 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Refrigeration system for an air conditioner for the air conditioning of a motor vehicle and method for cooling charge air of a turbocharger of a motor vehicle
CN106123414A (en) * 2016-07-11 2016-11-16 江苏省邮电规划设计院有限责任公司 A kind of data center microchannel air conditioner in machine room evaporating preposition gas-liquid separation device
CN106382694A (en) * 2016-08-29 2017-02-08 东南大学 Cabinet-based direct evaporative cooled machine room air-conditioning system

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06201234A (en) * 1993-01-07 1994-07-19 Hitachi Ltd Air-conditioner
US6857287B1 (en) * 1999-09-16 2005-02-22 Altech Controls Corporation Refrigeration cycle
JP2004309029A (en) * 2003-04-08 2004-11-04 Matsushita Electric Ind Co Ltd Refrigerating cycle device
CN104729130A (en) * 2013-12-24 2015-06-24 珠海格力电器股份有限公司 Air conditioning system and control method thereof
DE102014102830A1 (en) * 2014-03-04 2015-09-10 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Refrigeration system for an air conditioner for the air conditioning of a motor vehicle and method for cooling charge air of a turbocharger of a motor vehicle
CN106123414A (en) * 2016-07-11 2016-11-16 江苏省邮电规划设计院有限责任公司 A kind of data center microchannel air conditioner in machine room evaporating preposition gas-liquid separation device
CN106382694A (en) * 2016-08-29 2017-02-08 东南大学 Cabinet-based direct evaporative cooled machine room air-conditioning system

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