CN109186026A - Air-conditioning system and its control method - Google Patents
Air-conditioning system and its control method Download PDFInfo
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- CN109186026A CN109186026A CN201811326451.9A CN201811326451A CN109186026A CN 109186026 A CN109186026 A CN 109186026A CN 201811326451 A CN201811326451 A CN 201811326451A CN 109186026 A CN109186026 A CN 109186026A
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- Prior art keywords
- refrigerant
- air
- coolant
- conditioning system
- adjuster
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
- F24F5/0003—Exclusively-fluid systems
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B13/00—Compression machines, plants or systems, with reversible cycle
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
- F25B49/022—Compressor control arrangements
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
Abstract
The present invention provides a kind of air-conditioning system and its control method.The air-conditioning system includes compressor (1), indoor heat exchanger (2), outdoor heat exchanger (3) and adjusting device for amount of coolant, adjusting device for amount of coolant includes refrigerant adjuster (4), refrigerant inlet pipe (5) and refrigerant outlet pipe (6), and there are adjusting device for amount of coolant refrigerant adjuster (4) to participate in the first working condition of refrigerant flow circuit and refrigerant adjuster (4) is used to store refrigerant and is not involved in the second working condition of refrigerant flow circuit.Air-conditioning system according to the present invention can make cooling medium charging amount of air-conditioning system under the conditions of low-frequency operation match with the best groundwater increment under underload or low frequency condition, improve operational energy efficiency of the air-conditioning system under underload or low frequency condition.
Description
Technical field
The invention belongs to air-conditioning technique fields, and in particular to a kind of air-conditioning system and its control method.
Background technique
The best groundwater increment of air-conditioning system at different operating conditions is different from, therefore the groundwater increment in air-conditioning system is wanted
It avoids low frequency coolant quantity excessive under the premise of guaranteeing that high frequency coolant quantity is enough and influences low-frequency operation efficiency namely air-conditioning is whole
Machine cooling medium charging amount needs match with the best groundwater increment under each operating condition different frequency, to realize the best of operation of air conditioner
Efficiency requirement.In addition, have the twin-stage air-conditioning system of enthalpy-increasing function in actual motion, and under low frequency low load condition, compressor
Using increasing enthalpy design is closed, refrigerant adjuster 4 is only equivalent to concatenate a pipe between two capillaries within air-conditioning systems at this time
The relatively very big copper pipe of diameter, utility value is small, under underload operation of air conditioner ability and efficiency without any contribution function, can not
So that cooling medium charging amount of air-conditioning system under the conditions of low-frequency operation is matched with the best groundwater increment under low frequency condition, reduces sky
Operational energy efficiency of the adjusting system under low frequency condition.
Summary of the invention
Therefore, the technical problem to be solved in the present invention is that providing a kind of air-conditioning system and its control method, sky can be made
Cooling medium charging amount of adjusting system under the conditions of low-frequency operation matches with the best groundwater increment under underload or low frequency condition, improves
Operational energy efficiency of the air-conditioning system under underload or low frequency condition.
To solve the above-mentioned problems, the present invention provides a kind of air-conditioning system, including compressor, indoor heat exchanger, outdoor change
Hot device and adjusting device for amount of coolant, adjusting device for amount of coolant include refrigerant adjuster, refrigerant inlet pipe and refrigerant outlet pipe, coolant quantity tune
Regulating device have refrigerant adjuster participate in refrigerant flow circuit the first working condition and refrigerant adjuster for store refrigerant and
It is not involved in the second working condition of refrigerant flow circuit.
Preferably, refrigerant adjuster is flash vessel, and air-conditioning system further includes tonifying Qi pipeline, and tonifying Qi pipeline is connected to refrigerant tune
It saves between the gas outlet of device and the gas supplementing opening of compressor, blowdown pipe road is provided with the first control valve.
Preferably, first throttle valve is provided between outdoor heat exchanger and adjusting device for amount of coolant；And/or coolant quantity tune
Second throttle is provided between regulating device and indoor heat exchanger.
Preferably, adjusting device for amount of coolant further includes straight-through pipeline, and one end of refrigerant inlet pipe is connected to refrigerant adjuster
Refrigerant inlet, the other end of refrigerant inlet pipe are connected to outdoor heat exchanger, and one end of refrigerant outlet pipe is connected to the cold of refrigerant adjuster
Matchmaker outlet, the other end of refrigerant outlet pipe are connected to indoor heat exchanger, and one end of straight-through pipeline is connected to outdoor heat exchanger, the other end
It is connected to indoor heat exchanger, the second control valve is provided on refrigerant inlet pipe, third control valve, straight pipe are provided in refrigerant outlet pipe
Road is provided with the 4th control valve.
Preferably, adjusting device for amount of coolant further includes straight-through pipeline, and one end of refrigerant inlet pipe is connected to refrigerant adjuster
Refrigerant inlet, one end of refrigerant outlet pipe are connected to the refrigerant exit of refrigerant adjuster, and the other end of refrigerant outlet pipe is connected to interior
Heat exchanger is provided with third control valve in refrigerant outlet pipe, and one end of straight-through pipeline is connected to outdoor heat exchanger, refrigerant inlet pipe it is another
The other end of one end and straight-through pipeline is connected to indoor heat exchanger by triple valve, and refrigerant inlet pipe and straight-through pipeline pass through triple valve
Selectively it is connected to indoor heat exchanger.
Preferably, air-conditioning system includes first throttle valve and second throttle, and adjusting device for amount of coolant further includes the one or four
Port valve, the first interface of the first four-way valve are connected to outdoor heat exchanger, and the 4th interface of the first four-way valve is connected to indoor heat exchange
Device, the second interface of the first four-way valve are connected to refrigerant inlet pipe, and the third interface of the first four-way valve is connected to refrigerant outlet pipe.
Preferably, air-conditioning system further includes the second four-way valve, the second four-way valve respectively with the exhaust outlet of compressor and return-air
Mouth, outdoor heat exchanger are connected with indoor heat exchanger.
According to another aspect of the present invention, a kind of control method of above-mentioned air-conditioning system is provided, comprising:
Obtain the working condition of compressor；
When compressor needs to carry out increasing enthalpy, and controls adjusting device for amount of coolant and be in the first working condition；
When compressor needs to close increasing enthalpy, control refrigerant flows through adjusting device for amount of coolant, to the refrigerant in air-conditioning system
Amount is adjusted, and after coolant quantity within air-conditioning systems is adjusted in place, control refrigerant device is in the second working condition, makes refrigerant
It is not passed through refrigerant adjuster.
Preferably, controlling the step of adjusting device for amount of coolant is in the first working condition includes:
The first control valve, the second control valve and third control valve are opened, the 4th control valve is closed；
Make refrigerant after refrigerant adjuster, a part of gaseous coolant flows back to the gas returning port of compressor from tonifying Qi pipeline, and one
Liquid refrigerants is divided to enter primary flow path through refrigerant outlet pipe.
Preferably, controlling the step of adjusting device for amount of coolant is in the first working condition includes:
The first interface for controlling the first four-way valve is connected to second interface, third interface and the 4th orifice, opens the
One control valve；
Refrigerant is controlled after four-way valve and refrigerant inlet pipe enter refrigerant adjuster, a part of gaseous coolant is from tonifying Qi pipeline stream
The gas returning port of compressor is returned, third interface and fourth interface of a part of liquid refrigerants through refrigerant outlet pipe through the first four-way valve enter
Primary flow path.
Preferably, when compressor needs to close increasing enthalpy, control refrigerant flows through adjusting device for amount of coolant, in air-conditioning system
Coolant quantity be adjusted, after coolant quantity within air-conditioning systems is adjusted in place, control refrigerant device is in the second working condition,
The step of making refrigerant be not passed through refrigerant adjuster includes:
It controls the first control valve and the second control valve is opened, control third control valve and the 4th control valve is closed；
Control refrigerant is flowed through refrigerant inlet pipe into refrigerant adjuster, and coolant quantity is adjusted；
After coolant quantity is adjusted in place, controlling the first control valve and the second control valve is closed, the 4th control valve of control is opened,
Refrigerant enters primary flow path directly through straight-through pipeline.
Preferably, when compressor needs to close increasing enthalpy, control refrigerant flows through adjusting device for amount of coolant, in air-conditioning system
Coolant quantity be adjusted, after coolant quantity within air-conditioning systems is adjusted in place, control refrigerant device is in the second working condition,
The step of making refrigerant be not passed through refrigerant adjuster includes:
The first interface for controlling the first four-way valve is connected to second interface, third interface and the 4th orifice, opens the
One control valve；
The aperture for tuning up first throttle valve turns the aperture of second throttle down, so that refrigerant starts into refrigerant adjuster
Accumulate；
After coolant quantity is adjusted in place, control the first four-way valve commutation, while controlling the first control valve and closing, so that first
Interface and the 4th orifice, second interface and third orifice, refrigerant are no longer flow through refrigerant adjuster, directly connect through first
Mouth and the 4th interface flow to primary flow path.
Air-conditioning system provided by the invention, including compressor, indoor heat exchanger, outdoor heat exchanger and coolant quantity adjust dress
It sets, adjusting device for amount of coolant includes refrigerant adjuster, refrigerant inlet pipe and refrigerant outlet pipe, and adjusting device for amount of coolant is adjusted with refrigerant
The first working condition and refrigerant adjuster that device participates in refrigerant flow circuit are for storing refrigerant and being not involved in refrigerant flow circuit
The second working condition.The air-conditioning system during the work time, when compressor be in high load capacity or it is high-frequency under the conditions of, can be with
Control adjusting device for amount of coolant is in the first working condition, so that the cooling medium charging amount in air-conditioning system and high load capacity or high frequency item
Best groundwater increment under part matches, when compressor be in underload or it is low-frequency under the conditions of, can control coolant quantity adjusting
Device is in the second working condition, so that the best filling under the conditions of the cooling medium charging amount in air-conditioning system and underload or low frequency
Fluence matches, to effectively improve the work efficiency of air-conditioning system in the process of running, enhances the heat exchanger of air-conditioning system
Heat transfer effect.
Detailed description of the invention
Fig. 1 is the structure principle chart of the air-conditioning system of first embodiment of the invention；
Fig. 2 is that the air-conditioning system of second embodiment of the invention is in the structure principle chart for opening increasing enthalpy state；
Fig. 3 is that the air-conditioning system of second embodiment of the invention is in the structure principle chart for closing increasing enthalpy state；
The control method flow chart of the air-conditioning system of Fig. 4 embodiment of the present invention.
Appended drawing reference indicates are as follows:
1, compressor；2, indoor heat exchanger；3, outdoor heat exchanger；4, refrigerant adjuster；5, refrigerant inlet pipe；6, refrigerant goes out
Pipe；7, tonifying Qi pipeline；8, the first control valve；9, first throttle valve；10, second throttle；11, pipeline is led directly to；12, the second control
Valve；13, third control valve；14, the 4th control valve；15, the first four-way valve；16, the second four-way valve.
Specific embodiment
In conjunction with referring to shown in Fig. 1 to Fig. 3, according to an embodiment of the invention, air-conditioning system includes compressor 1, indoor heat exchange
Device 2, outdoor heat exchanger 3 and adjusting device for amount of coolant, adjusting device for amount of coolant include refrigerant adjuster 4, refrigerant inlet pipe 5 and refrigerant
Outlet pipe 6, the first working condition and refrigerant adjuster that there is adjusting device for amount of coolant refrigerant adjuster 4 to participate in refrigerant flow circuit
4 are used to store refrigerant and are not involved in the second working condition of refrigerant flow circuit.
The air-conditioning system during the work time, when compressor be in high load capacity or it is high-frequency under the conditions of, can control cold
Matchmaker's quantity regulating device is in the first working condition, so that under the cooling medium charging amount in air-conditioning system and high load capacity or high frequency condition
Best groundwater increment matches, when compressor be in underload or it is low-frequency under the conditions of, can control at adjusting device for amount of coolant
In the second working condition, so that the cooling medium charging amount in air-conditioning system and the best groundwater increment phase under the conditions of underload or low frequency
Matching enhances the heat exchange effect of the heat exchanger of air-conditioning system to effectively improve the work efficiency of air-conditioning system in the process of running
Fruit.
By above-mentioned mode, it can change according to the air conditioning operating mode under different load and participate in the cold of complete machine circulation
Matchmaker's internal circulating load enhances air conditioner heat transfer effect to reduce the liquid storage amount of heat exchanger under underload.
Refrigerant adjuster 4 is flash vessel, and air-conditioning system further includes tonifying Qi pipeline 7, and tonifying Qi pipeline 7 is connected to refrigerant adjuster
Between 4 gas outlet and the gas supplementing opening of compressor 1, the first control valve 8 is provided on tonifying Qi pipeline 7.Refrigerant adjuster 4 can also be with
For other containers with refrigerant adjustment, such as the accommodating chamber with certain volume, can satisfy refrigerant storage and
The copper pipe etc. of supply requirement.
By the way that tonifying Qi pipeline 7 is arranged, Gas-supplying enthalpy-increasing can be formed in the compound compressor course of work, improve air conditioner
Work efficiency, simultaneously as being provided with the first control valve 8 of the pipeline on-off on tonifying Qi pipeline 7, therefore can pass through first
Control valve 8 realizes the switchover operation of compressor opened increasing enthalpy mode and close increasing enthalpy mode.
It, can be according to the different load tune of air-conditioning system since air-conditioning system can operate in open and close increasing enthalpy mode
The open and close increasing enthalpy mode of whole air-conditioning system, and according to the open and close increasing enthalpy mode of air-conditioning system come to the refrigerant for participating in complete machine circulation
Flow is adjusted, and will close the refrigerant adjuster 4 under increasing enthalpy mode and be utilized as the liquid storage filling for storing unnecessary refrigerant, to have
Effect reduces the liquid storage amount of heat exchanger under underload, so that air-conditioning system is in when closing under increasing enthalpy mode, the refrigerant in air-conditioning system
Groundwater increment can match with the best groundwater increment under low load condition, enhance air conditioner heat transfer effect.
First throttle valve 9 is provided between outdoor heat exchanger 3 and adjusting device for amount of coolant；And/or adjusting device for amount of coolant
Second throttle 10 is provided between indoor heat exchanger 2.First throttle valve 9 and second throttle 10 can play reducing pressure by regulating flow
Effect, advantageously allow liquid refrigerants and be further depressured as gaseous coolant, the endothermic effect of refrigerant can be improved, improve refrigerant
Heat exchange amount.
Air-conditioning system further includes the second four-way valve 16, the second four-way valve 16 respectively with the exhaust outlet of compressor 1 and gas returning port,
Outdoor heat exchanger 3 and indoor heat exchanger 2 connect.
In conjunction with shown in Figure 1, first embodiment according to the present invention, adjusting device for amount of coolant further includes straight-through pipeline
11, one end of refrigerant inlet pipe 5 is connected to the refrigerant inlet of refrigerant adjuster 4, and the other end of refrigerant inlet pipe 5 is connected to outdoor heat exchange
Device 3, one end of refrigerant outlet pipe 6 are connected to the refrigerant exit of refrigerant adjuster 4, and the other end of refrigerant outlet pipe 6 is connected to interior and changes
One end of hot device 2, straight-through pipeline 11 is connected to outdoor heat exchanger 3, and the other end is connected to indoor heat exchanger 2, sets on refrigerant inlet pipe 5
It is equipped with the second control valve 12, is provided with third control valve 13 in refrigerant outlet pipe 6, is provided with the 4th control valve on straight-through pipeline 11
14。
When under air-conditioning system is in refrigeration mode, refrigerant is flowed out from outdoor heat exchanger 3, then through 9 section of first throttle valve
, can be there are two types of flow path, when in increasing enthalpy mode is opened after stream, refrigerant enters refrigerant adjuster 4 through refrigerant inlet pipe 5,
Then gaseous coolant flows into the gas supplementing opening of compressor from the gas outlet of refrigerant adjuster 4 through tonifying Qi pipeline 7, mends to compressor
Gas increasing enthalpy leads directly to pipeline 11 at this time and disconnects, and the refrigerant in refrigerant adjuster 4 participates in the refrigerant circulation of air-conditioning system.When in pass
When increasing enthalpy mode, refrigerant inlet pipe 5 and refrigerant outlet pipe 6 and tonifying Qi pipeline 7 are in closed state, and refrigerant can be directly through straight-through
Pipeline 11 enters primary flow path, and enters the room heat exchanger after the second throttle 10 in primary flow path throttles again and exchange heat.
When entering pipe increasing enthalpy mode, if necessary to the coolant quantity in reduction system, then refrigerant outlet pipe 6 and straight-through pipeline can be first closed
11, refrigerant is entered in refrigerant adjuster 4 through refrigerant inlet pipe 5 and is stored, when the coolant quantity in air-conditioning system reaches
To after required coolant quantity, then the adjusting of pipeline is carried out, so that refrigerant is no longer flow through refrigerant adjuster 4, refrigerant adjuster 4 at this time
It is no longer participate in refrigerant circulation, the cooling medium charging amount in air-conditioning system can match with the best groundwater increment under the state, improve
The work efficiency of air-conditioning system.
Above-mentioned primary flow path refer to air-conditioning system major cycle flow path namely air-conditioning system refrigerant through compressor, outdoor
The circulation stream of heat exchanger, throttle valve and indoor heat exchanger flowing.
In another embodiment not shown in the figure, adjusting device for amount of coolant further includes straight-through pipeline 11, refrigerant inlet pipe 5
One end be connected to the refrigerant inlet of refrigerant adjuster 4, one end of refrigerant outlet pipe 6 is connected to the refrigerant exit of refrigerant adjuster 4,
The other end of refrigerant outlet pipe 6 is connected to indoor heat exchanger 2, and third control valve 13 is provided in refrigerant outlet pipe 6, leads directly to pipeline 11
One end is connected to outdoor heat exchanger 3, and the other end of the other end of refrigerant inlet pipe 5 and straight-through pipeline 11 is connected to room by triple valve
Interior heat exchanger 2, refrigerant inlet pipe 5 and straight-through pipeline 11 are selectively connected to indoor heat exchanger 2 by triple valve.
In the present embodiment, with a triple valve come instead of the function of third control valve 13 and the 4th control valve 14,
It can be achieved on above-mentioned control effect.
In conjunction with shown in referring to figs. 2 and 3, second embodiment according to the present invention, air-conditioning system includes 9 He of first throttle valve
Second throttle 10, adjusting device for amount of coolant further include the first four-way valve 15, and the first interface E of the first four-way valve 15 is connected to room
External heat exchanger 3, the 4th interface H of the first four-way valve 15 are connected to indoor heat exchanger 2, and the second interface F of the first four-way valve 15 connects
It is connected to refrigerant inlet pipe 5, the third interface G of the first four-way valve 15 is connected to refrigerant outlet pipe 6.
In the present embodiment, when air-conditioning system, which is in, opens increasing enthalpy mode, it is only necessary to the spool of the first four-way valve 15 is controlled,
So that first interface E is connected to second interface F, third interface G is connected to the 4th interface H, while opens the first control valve 8,
It so that refrigerant adjuster 4 is participated in refrigerant circulation, while gaseous coolant being allowed to carry out tonifying Qi increasing by tonifying Qi pipeline 7
Enthalpy improves the working performance of air-conditioning system, when air-conditioning system is in and closes increasing enthalpy mode, it is only necessary to control the first four-way valve 15 and cut
State is changed, so that first interface E is connected to the 4th interface H, second interface F is connected to third interface G, it will be able to so that refrigerant is straight
It meets first interface E and the 4th interface H through the first four-way valve 15 and flows to second throttle 10, without flowing through refrigerant adjuster 4,
Refrigerant adjuster is not involved in refrigerant circulation.When needing to carry out the adjusting of coolant quantity, it so that the first four-way valve 15 is in and open
Then increasing enthalpy operating status tunes up first throttle valve 9, turn second throttle 10 down, so that refrigerant enters refrigerant adjuster 4
More, outflow refrigerant adjuster 4 lacks, so as to reduce the internal circulating load of refrigerant, so that extra refrigerant is stored in refrigerant adjusting
In device 4.
In conjunction with shown in Figure 4, according to an embodiment of the invention, a kind of control method of above-mentioned air-conditioning system includes:
Obtain the working condition of compressor 1；When compressor 1 needs to carry out increasing enthalpy, and controls adjusting device for amount of coolant and be in the first work
Make state；When compressor 1 needs to close increasing enthalpy, control refrigerant flows through adjusting device for amount of coolant, to the refrigerant in air-conditioning system
Amount is adjusted, and after coolant quantity within air-conditioning systems is adjusted in place, control refrigerant device is in the second working condition, makes refrigerant
It is not passed through refrigerant adjuster 4.
The air-conditioning system during the work time, when compressor be in high load capacity or it is high-frequency under the conditions of, can control cold
Matchmaker's quantity regulating device is in the first working condition, so that under the cooling medium charging amount in air-conditioning system and high load capacity or high frequency condition
Best groundwater increment matches, when compressor be in underload or it is low-frequency under the conditions of, can control at adjusting device for amount of coolant
In the second working condition, so that the cooling medium charging amount in air-conditioning system and the best groundwater increment phase under the conditions of underload or low frequency
Matching enhances the heat exchange effect of the heat exchanger of air-conditioning system to effectively improve the work efficiency of air-conditioning system in the process of running
Fruit.
The step of control adjusting device for amount of coolant is in the first working condition includes: to open the control of the first control valve 8, second
Valve 12 and third control valve 13 close the 4th control valve 14；Make refrigerant after refrigerant adjuster 4, a part of gaseous coolant is from benefit
Air pipe 7 flows back to the gas returning port of compressor 1, and a part of liquid refrigerants enters primary flow path through refrigerant outlet pipe 6.
The step of control adjusting device for amount of coolant is in the first working condition includes: to control the first of the first four-way valve 15 to connect
Mouth E is connected to second interface F, and the first control valve 8 is opened in third interface G and the 4th interface H connection；Refrigerant is controlled through four-way valve
After entering refrigerant adjuster 4 with refrigerant inlet pipe 5, a part of gaseous coolant flows back to the gas returning port of compressor 1 from tonifying Qi pipeline 7, and one
Third interface G and fourth interface H of the operative liquid refrigerant through refrigerant outlet pipe 6 through the first four-way valve 15 enter primary flow path.
When compressor 1 needs to close increasing enthalpy, control refrigerant flows through adjusting device for amount of coolant, to the refrigerant in air-conditioning system
Amount is adjusted, and after coolant quantity within air-conditioning systems is adjusted in place, control refrigerant device is in the second working condition, makes refrigerant
The step of being not passed through refrigerant adjuster 4 includes: that the first control valve 8 of control and the second control valve 12 are opened, and controls third control valve
13 and the 4th control valve 14 close；Control refrigerant is flowed through refrigerant inlet pipe 5 into refrigerant adjuster 4, and coolant quantity is adjusted；
After coolant quantity is adjusted in place, controls the first control valve 8 and the second control valve 12 is closed, the 4th control valve 14 of control is opened, cold
Matchmaker enters primary flow path directly through straight-through pipeline 11.
When compressor 1 needs to close increasing enthalpy, control refrigerant flows through adjusting device for amount of coolant, to the refrigerant in air-conditioning system
Amount is adjusted, and after coolant quantity within air-conditioning systems is adjusted in place, control refrigerant device is in the second working condition, makes refrigerant
The step of being not passed through refrigerant adjuster 4 includes: that the first interface E of the first four-way valve 15 of control is connected to second interface F, and third connects
Mouth G and the 4th interface H connection, opens the first control valve 8；The aperture for tuning up first throttle valve 9 turns opening for second throttle 10 down
Degree, so that refrigerant starts to accumulate into refrigerant adjuster 4；After coolant quantity is adjusted in place, control the first four-way valve 15 commutation, together
When control the first control valve 8 closing so that first interface E is connected to the 4th interface H, second interface F is connected to third interface G,
Refrigerant is no longer flow through refrigerant adjuster 4, directly flows to primary flow path through first interface E and the 4th interface H.
For the air-conditioning system of first embodiment, high load capacity or it is high-frequency under the conditions of, it is advantageous that complete machine opens increasing enthalpy
In the promotion of ability and efficiency, the first control valve 8 is opened at this time, and the second control valve 12 and third control valve 13 are also opened, and the 4th
Control valve 14 is closed, and the normal temperature high voltage supercooled liquid refrigerant that heat release is completed from outdoor heat exchanger 3 at this time enters first throttle valve 9
4 shwoot of refrigerant adjuster is entered by the second control valve 12 opened after throttling, gaseous coolant is filled by the first control valve 8
Compressor increasing enthalpy, liquid refrigerants then pass through open third control valve 13 and enter the circulation that second throttle 10 completes main road, from
And form the Gas-supplying enthalpy-increasing process of a routine.The refrigerant being perfused in system at this time be completely used for complete machine circulation, participate in heat absorption with
Exothermic process.
Underload or it is low-frequency under the conditions of, complete machine needs to close increasing enthalpy, conventional double to reduce compressor horsepower output
Grade increasing enthalpy system at this moment close by the first control valve 8, and refrigerant is exported from first throttle valve 9 and is directly passed into refrigerant adjuster 4,
And then export and flow out from refrigerant adjuster 4, lead to second throttle 10, refrigerant adjuster 4 is equivalent within air-conditioning systems at this time
The pipeline of one Large Diameter Pipeline, no any substantive acts on and increases resistance when refrigerant flows.This programme increases by the second control
14 3 valve 12, third control valve 13 and the 4th control valve valves, when air conditioner from open increasing enthalpy be changed into close increasing enthalpy when, pass through
Control logic, first third control valve 13 and the 4th control valve 14 are closed, and the refrigerant that first throttle valve 9 exports at this time can only pass through
Second control valve 12 enters in refrigerant adjuster 4, and third control valve 13 is closed, and can slowly accumulate liquid in refrigerant adjuster 4 at this time
State refrigerant opens the 4th control until closing the first control valve 8, the second control valve 12 and third control valve 13 after suitable state
Valve 14 processed, so that whole system is adjusted to the concatenated ordinary single-stage air-conditioning system of two throttle valves.
For the air-conditioning system of second embodiment, complete machine air-conditioning system is when opening increasing enthalpy, and the of the first four-way valve 15
One interface E and second interface F are communicated, and third interface G and the 4th interface H are communicated, and the first control valve 8 is opened, and refrigerant passes through at this time
After first throttle valve 9,4 shwoot of refrigerant adjuster is entered by first interface E and second interface F, gas fills into compressor, liquid
Body flows out refrigerant adjuster 4 and enters the progress main road circulation of second throttle 10 by third interface G and the 4th interface H.
When closing increasing enthalpy, first throttle valve 9 is tuned up first and turns second throttle 10 down, so that starting in refrigerant adjuster 4
Liquid storage, after coolant quantity adjusting reaches preset requirement, the flow path of the first four-way valve 15 of switching meets first interface E and the 4th
Mouth H connection, second interface F are connected to third interface G, simultaneously close off the first control valve 8, air conditioner operational mode is at this time
Close increasing enthalpy mode.
The application uses the folding of valve class component, and air-conditioning system may be implemented and opening increasing enthalpy and closing under increasing enthalpy both of which
Refrigerant circulation adjust, and complete machine efficiency is promoted with this and enhances the heat transfer effect of heat exchanger.
Those skilled in the art will readily recognize that above-mentioned each advantageous manner can be free under the premise of not conflicting
Ground combination, superposition.
The above is merely preferred embodiments of the present invention, be not intended to limit the invention, it is all in spirit of the invention and
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within principle.Above only
It is the preferred embodiment of the present invention, it is noted that for those skilled in the art, do not departing from this hair
Under the premise of bright technical principle, several improvements and modifications can also be made, these improvements and modifications also should be regarded as guarantor of the invention
Protect range.
Claims (12)
1. a kind of air-conditioning system, which is characterized in that including compressor (1), indoor heat exchanger (2), outdoor heat exchanger (3) and refrigerant
Quantity regulating device, the adjusting device for amount of coolant include refrigerant adjuster (4), refrigerant inlet pipe (5) and refrigerant outlet pipe (6), described
First working condition and the refrigerant tune of the adjusting device for amount of coolant with the refrigerant adjuster (4) participation refrigerant flow circuit
Section device (4) is used to store refrigerant and is not involved in the second working condition of refrigerant flow circuit.
2. air-conditioning system according to claim 1, which is characterized in that the refrigerant adjuster (4) is flash vessel, the sky
Adjusting system further includes tonifying Qi pipeline (7), and the tonifying Qi pipeline (7) is connected to the gas outlet of the refrigerant adjuster (4) and described
Between the gas supplementing opening of compressor (1), the first control valve (8) are provided on the tonifying Qi pipeline (7).
3. air-conditioning system according to claim 1, which is characterized in that the outdoor heat exchanger (3) and the coolant quantity tune
First throttle valve (9) are provided between regulating device；And/or between the adjusting device for amount of coolant and the indoor heat exchanger (2)
It is provided with second throttle (10).
4. air-conditioning system according to claim 1, which is characterized in that the adjusting device for amount of coolant further includes straight-through pipeline
(11), one end of the refrigerant inlet pipe (5) is connected to the refrigerant inlet of the refrigerant adjuster (4), the refrigerant inlet pipe (5)
The other end is connected to the outdoor heat exchanger (3), and one end of the refrigerant outlet pipe (6) is connected to the refrigerant adjuster (4)
The other end of refrigerant exit, the refrigerant outlet pipe (6) is connected to the indoor heat exchanger (2), and the one of the straight-through pipeline (11)
End is connected to the outdoor heat exchanger (3), and the other end is connected to the indoor heat exchanger (2), is arranged on the refrigerant inlet pipe (5)
Have the second control valve (12), be provided with third control valve (13) on the refrigerant outlet pipe (6), is arranged on the straight-through pipeline (11)
There is the 4th control valve (14).
5. air-conditioning system according to claim 1, which is characterized in that the adjusting device for amount of coolant further includes straight-through pipeline
(11), one end of the refrigerant inlet pipe (5) is connected to the refrigerant inlet of the refrigerant adjuster (4), the refrigerant outlet pipe (6)
One end is connected to the refrigerant exit of the refrigerant adjuster (4), and the other end of the refrigerant outlet pipe (6) is connected to the interior and changes
Hot device (2) is provided with third control valve (13) on the refrigerant outlet pipe (6), and one end of the straight-through pipeline (11) is connected to institute
It states outdoor heat exchanger (3), the other end of the refrigerant inlet pipe (5) and the other end of the straight-through pipeline (11) are connected by triple valve
It is connected to the indoor heat exchanger (2), the refrigerant inlet pipe (5) and the straight-through pipeline (11) pass through the triple valve selectively
It is connected to the indoor heat exchanger (2).
6. air-conditioning system according to claim 3, which is characterized in that the air-conditioning system include first throttle valve (9) and
Second throttle (10), the adjusting device for amount of coolant further include the first four-way valve (15), and the of first four-way valve (15)
One interface is connected to the outdoor heat exchanger (3), and the 4th interface of first four-way valve (15) is connected to the indoor heat exchange
Device (2), the second interface of first four-way valve (15) are connected to the refrigerant inlet pipe (5), first four-way valve (15)
Third interface is connected to the refrigerant outlet pipe (6).
7. air-conditioning system according to any one of claim 1 to 5, which is characterized in that the air-conditioning system further includes
Two four-way valves (16), second four-way valve (16) are changed with the exhaust outlet of the compressor (1) and gas returning port, the outdoor respectively
Hot device (3) and the indoor heat exchanger (2) connection.
8. a kind of control method of the air-conditioning system as described in any one of claims 1 to 7 characterized by comprising
Obtain the working condition of compressor (1)；
When compressor (1) needs to carry out increasing enthalpy, and controls adjusting device for amount of coolant and be in the first working condition；
When compressor (1) needs to close increasing enthalpy, control refrigerant flows through adjusting device for amount of coolant, to the coolant quantity in air-conditioning system
It is adjusted, after coolant quantity within air-conditioning systems is adjusted in place, control refrigerant device is in the second working condition, makes refrigerant not
Flow through refrigerant adjuster (4).
9. control method according to claim 8, which is characterized in that the control adjusting device for amount of coolant is in the first work
The step of making state include:
The first control valve (8), the second control valve (12) and third control valve (13) are opened, the 4th control valve (14) is closed；
Make refrigerant after refrigerant adjuster (4), a part of gaseous coolant flows back to the gas returning port of compressor (1) from tonifying Qi pipeline (7),
A part of liquid refrigerants enters primary flow path through refrigerant outlet pipe (6).
10. control method according to claim 8, which is characterized in that the control adjusting device for amount of coolant is in first
The step of working condition includes:
The first interface for controlling the first four-way valve (15) is connected to second interface, third interface and the 4th orifice, opens the
One control valve (8)；
Refrigerant is controlled after four-way valve and refrigerant inlet pipe (5) enter refrigerant adjuster (4), a part of gaseous coolant is from tonifying Qi pipeline
(7) gas returning port of compressor (1) is flowed back to, a part of liquid refrigerants connects through refrigerant outlet pipe (6) through the third of the first four-way valve (15)
Mouth and the 4th interface enter primary flow path.
11. control method according to claim 8, which is characterized in that when compressor (1) needs to close increasing enthalpy, control
Refrigerant flows through adjusting device for amount of coolant, and the coolant quantity in air-conditioning system is adjusted, and coolant quantity within air-conditioning systems is adjusted
After in place, controlling the step of refrigerant device is in the second working condition, refrigerant is made to be not passed through refrigerant adjuster (4) includes:
It controls the first control valve (8) and the second control valve (12) is opened, control third control valve (13) and the 4th control valve (14)
It closes；
Refrigerant flowing into refrigerant adjuster (4) through refrigerant inlet pipe (5) is controlled, coolant quantity is adjusted；
After coolant quantity is adjusted in place, controls the first control valve (8) and the second control valve (12) is closed, control the 4th control valve
(14) it opens, refrigerant enters primary flow path directly through straight-through pipeline (11).
12. control method according to claim 8, which is characterized in that when compressor (1) needs to close increasing enthalpy, control
Refrigerant flows through adjusting device for amount of coolant, and the coolant quantity in air-conditioning system is adjusted, and coolant quantity within air-conditioning systems is adjusted
After in place, controlling the step of refrigerant device is in the second working condition, refrigerant is made to be not passed through refrigerant adjuster (4) includes:
The first interface for controlling the first four-way valve (15) is connected to second interface, third interface and the 4th orifice, opens the
One control valve (8)；
The aperture for tuning up first throttle valve (9) turns the aperture of second throttle (10) down, so that refrigerant starts to refrigerant adjuster
(4) accumulate in；
After coolant quantity is adjusted in place, control the first four-way valve (15) commutation, while controlling the first control valve (8) and closing, so that
First interface and the 4th orifice, second interface and third orifice, refrigerant are no longer flow through refrigerant adjuster (4), directly
Primary flow path is flowed to through first interface and the 4th interface.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811326451.9A CN109186026B (en) | 2018-11-08 | 2018-11-08 | Air conditioning system and control method thereof |
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| CN201811326451.9A CN109186026B (en) | 2018-11-08 | 2018-11-08 | Air conditioning system and control method thereof |
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| CN109186026B (en) | 2023-08-01 |
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