CN110529966A - A kind of change coolant quantity air-conditioning system and its control method - Google Patents

A kind of change coolant quantity air-conditioning system and its control method Download PDF

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Publication number
CN110529966A
CN110529966A CN201910852463.3A CN201910852463A CN110529966A CN 110529966 A CN110529966 A CN 110529966A CN 201910852463 A CN201910852463 A CN 201910852463A CN 110529966 A CN110529966 A CN 110529966A
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CN
China
Prior art keywords
control valve
refrigerant
air
conditioning system
coolant quantity
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201910852463.3A
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Chinese (zh)
Inventor
刘怿宁
郑志
郝正成
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Aux Air Conditioning Co Ltd
Ningbo Aux Electric Co Ltd
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Aux Air Conditioning Co Ltd
Ningbo Aux Electric Co Ltd
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Application filed by Aux Air Conditioning Co Ltd, Ningbo Aux Electric Co Ltd filed Critical Aux Air Conditioning Co Ltd
Priority to CN201910852463.3A priority Critical patent/CN110529966A/en
Publication of CN110529966A publication Critical patent/CN110529966A/en
Pending legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/64—Electronic processing using pre-stored data
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/65—Electronic processing for selecting an operating mode
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
    • F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/88—Electrical aspects, e.g. circuits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00—Control inputs relating to air properties
    • F24F2110/10—Temperature
    • F24F2110/12—Temperature of the outside air

Abstract

The present invention provides a kind of change coolant quantity air-conditioning system and its control methods, air-conditioning system includes refrigerant circulation circuit, it includes four-way reversing valve, indoor heat exchanger, throttle valve and outdoor heat exchanger, air-conditioning system further includes the coolant quantity regulating loop being connected with refrigerant circulation circuit, coolant quantity regulating loop includes: that there are two the liquid storage devices of port for tool, the first port of liquid storage device passes through the pipeline connection between the second pipeline and throttle valve and indoor heat exchanger by the pipeline connection between the first pipeline and four-way reversing valve and outdoor heat exchanger, the second port of liquid storage device；The first control valve and the second control valve connecting with same controller are correspondingly provided on first pipeline, second pipeline；Refrigerant is preset in liquid storage device.The present invention provides a kind of change coolant quantity air-conditioning system and its control methods, can control the coolant quantity recycled in air-conditioning system, guarantee the optimal refrigerant amount of air-conditioning system operation, to play heat exchanger efficiency to greatest extent.

Description

A kind of change coolant quantity air-conditioning system and its control method
Technical field
The present invention relates to air conditioner technical fields, in particular to a kind of change coolant quantity air-conditioning system and its controlling party Method.
Background technique
Refrigerant in air-conditioning system realizes refrigerating operaton or heating operation mode in the system internal circulation flow.For sky For adjusting system, the charging amount of refrigerant is fixed and invariable, the specified refrigeration as defined in standard, specified heating condition temperature model Near enclosing, preferably refrigeration or heating effect can achieve.But under refrigeration outside high temperature or heating outside low temperature condition, volume Fixed coolant quantity may make air-conditioning system running overload, cause refrigeration or heating effect bad；And when refrigeration outside low temperature Or under the high-temperature condition of heating outside, air-conditioning system underrun, coolant quantity is likely to be in surplus situation on the high side, this part Refrigerant does not play the role of heat exchange in system operation, causes the operational energy efficiency of temperature control equipment unit low.
Summary of the invention
Problems solved by the invention is existing air-conditioning system under high load capacity or underrun state, is unable to reach air-conditioning The optimal refrigerant amount of system, to situation about freezing or heating effect is bad, fluctuation of service or Energy Efficiency Ratio are low occur.
To solve the above problems, the present invention provides a kind of change coolant quantity air-conditioning system, including refrigerant circulation circuit, it is described cold Matchmaker's circulation loop includes four-way reversing valve, indoor heat exchanger, throttle valve and outdoor heat exchanger, the air-conditioning system further include with The connected coolant quantity regulating loop of the refrigerant circulation circuit, the coolant quantity regulating loop include: that there are two the storages of port for tool The first port of liquid device, the liquid storage device passes through the pipe between the first pipeline and the four-way reversing valve and the outdoor heat exchanger The second port of road connection, the liquid storage device passes through the pipeline between the second pipeline and the throttle valve and the indoor heat exchanger Connection；The first control valve connecting with same controller and the second control are correspondingly provided on first pipeline, second pipeline Valve processed；Wherein, refrigerant is preset in the liquid storage device.
Air-conditioning system provided by the invention, by be arranged coolant quantity regulating loop, liquid storage device and with liquid storage device both ends First control valve and the second control valve are set on the pipeline of connection, between liquid storage device, the first control valve and the second control valve Under cooperation, so that no matter air-conditioning system runs under refrigeration mode or heating mode, coolant quantity can be adjusted, with The coolant quantity recycled in control air-conditioning system, guarantees the optimal refrigerant amount of air-conditioning system operation, to play heat exchange to greatest extent Efficiency increases the heating and refrigeration effect of air-conditioning system, improves operation of air conditioner efficiency.
Optionally, it is provided with first flowmeter on first pipeline, is provided with second flowmeter on second pipeline, The first flowmeter and the second flowmeter are used to detect the refrigerant for flowing into the liquid storage device or flowing out from the liquid storage device Flow value.Be arranged flowmeter, more accurately the coolant quantity in refrigerant circulation circuit can be controlled, avoid because recycling or Optimal refrigerant amount needed for coolant quantity and the air-conditioning system operation of compensation is not inconsistent and influences the phenomenon that air-conditioning system is normally run Occur, guarantees the refrigeration or heating effect of air-conditioning system
Optionally, the air-conditioning system further includes detection device, for detecting outdoor environment temperature.In this way, in real time Outdoor environment temperature is monitored, and judges whether the coolant quantity in refrigerant circulation circuit needs to adjust according to outdoor environment temperature, Further improve the operation stability of air-conditioning system
Another object of the present invention is to propose a kind of control method for becoming coolant quantity air-conditioning system, to solve existing air-conditioning System is unable to reach the optimal refrigerant amount of air-conditioning system under high load capacity or underrun state, to occur freezing or make The problem that thermal effect is bad, fluctuation of service or Energy Efficiency Ratio are low.
To solve the above problems, the technical scheme of the present invention is realized as follows:
A kind of control method of change coolant quantity air-conditioning system as described above, comprising steps of in the air-conditioning system system Under heat or refrigeration mode, indoor environment temperature is detected；The temperature compared in the indoor environment temperature and the air-conditioning system is pre- If value, judgement opens or closes the coolant quantity regulating loop so that the air-conditioning system by control first control valve, Second control valve is opened or closed into the refrigerant shaping modes for adjusting coolant quantity in the refrigerant circulation circuit.
Control method provided by the invention, using the indoor environment temperature under air conditioner heat-production or refrigeration mode as increase or The control parameter for recycling refrigerant is increased refrigerant into refrigerant circulation circuit by liquid storage device or recycles the portion in refrigerant circulation circuit Divide refrigerant.The control precision that refrigerant is compensated or recycled into refrigerant circulation circuit can be improved, prevent from being not required in air-conditioning system Maloperation is carried out when adjusting coolant quantity, improves the operation stability and operational energy efficiency of air-conditioning system.
Optionally, the temperature preset value in the indoor environment temperature and the air-conditioning system, judges to open Or the coolant quantity regulating loop is closed, so that the air-conditioning system is by controlling first control valve, second control Valve is opened or closed into the refrigerant shaping modes for adjusting coolant quantity in the refrigerant circulation circuit, comprising: in the air-conditioning Under cooling system mode, by the first temperature preset value in the indoor environment temperature and the temperature preset value, second temperature Preset value is compared；If indoor environment temperature < the first temperature preset value, first control valve is opened, second control Valve processed is closed, into the first refrigerant recovering mode in the refrigerant shaping modes；If indoor environment temperature > second temperature is pre- If value, then first control valve is closed, second control valve is opened, the first refrigerant into the refrigerant shaping modes Compensation model；If the first temperature preset value≤indoor environment temperature≤the first temperature preset value, first control valve is closed, Second control valve is closed, so that the coolant quantity regulating loop in the air-conditioning system enters closed state.
Control method provided by the invention by the first temperature preset value of setting and second temperature preset value, and will test Outdoor environment temperature be compared with preset value, by judging result by the operating status of the first control valve and the second control valve It embodies, the judgement for whether compensating or recycling refrigerant to refrigerant circulation circuit can be further increased in cooling mode Accuracy, and then be conducive to further increase the operational energy efficiency of air-conditioning system.
Optionally, the temperature preset value in the indoor environment temperature and the air-conditioning system, judges to open Or the coolant quantity regulating loop is closed, so that the air-conditioning system is by controlling first control valve, second control Valve is opened or closed into the refrigerant shaping modes for adjusting coolant quantity in the refrigerant circulation circuit, further includes: in the sky Under adjusting system heating mode, by the third temperature preset value in the indoor environment temperature and the temperature preset value, the 4th temperature Degree preset value is compared；If indoor environment temperature < third temperature preset value, first control valve is opened, described second Control valve is closed, into the second refrigerant compensation model in the refrigerant shaping modes；If the 4th temperature of indoor environment temperature > Preset value, then first control valve is closed, and second control valve is opened, cold into second in the refrigerant shaping modes Matchmaker's take-back model；If third temperature preset value≤indoor environment temperature≤the 4th temperature preset value, first control valve is closed It closes, second control valve is closed, so that the coolant quantity regulating loop in the air-conditioning system enters closed state.
Control method provided by the invention by setting third temperature preset value and the 4th temperature preset value, and will test Outdoor environment temperature be compared with preset value, by judging result by the operating status of the first control valve and the second control valve It embodies, the judgement for whether compensating or recycling refrigerant to refrigerant circulation circuit can be further increased in a heating mode Accuracy.
Optionally, the first flowmeter detects to obtain the first cold medium flux value, and the second flowmeter detects to obtain Two cold medium flux values；In the control method, the entrance the first refrigerant recovering mode includes: that first control valve is opened Open, second control valve is closed, described into after the first refrigerant recovering mode in the refrigerant shaping modes, step is also Include: acquisition and judges whether the first cold medium flux value reaches the first flow preset value in the air-conditioning system；If so, Then first control valve is closed, and second control valve is closed, so that the coolant quantity regulating loop enters closed state；
The first refrigerant compensation model that enters includes: that the first control valve is closed, and the second control valve is opened, in the entrance After the first refrigerant recovering mode in the refrigerant shaping modes, step further include: obtain and judge that the second cold medium flux value is It is no to reach second flow preset value；If so, the first control valve is closed, the second control valve is closed.
Control method provided by the invention, the refrigerant in refrigerant circulation circuit is compensated or removal process in, lead to It crosses and the cold medium flux for flowing in or out liquid storage device is measured in real time, and the flow value that will test is compared in preset value, By the compensation and removal process materialization to refrigerant, on the one hand, can be further improved to the first control valve and the second control valve Control precision；On the other hand, the quantitative adjusting that the coolant quantity to compensation and recycling may be implemented, avoids coolant quantity adjusted It is not inconsistent with optimal refrigerant amount needed for air-conditioning system operation and influences air-conditioning system and normally run, to improves air-conditioning system Refrigeration effect.
Optionally, the first flowmeter detects to obtain the first cold medium flux value, and the second flowmeter detects to obtain Two cold medium flux values；In the control method, the entrance the second refrigerant compensation model includes: that first control valve is opened It opens, second control valve is closed, and described into after the second refrigerant compensation model in the refrigerant shaping modes, step is also Include: acquisition and judges whether the first cold medium flux value reaches the 4th flow preset value in the air-conditioning system；If so, Then first control valve is closed, and second control valve is closed, so that the coolant quantity regulating loop enters closed state；
The entrance the second refrigerant recovering mode includes: that first control valve is opened, second control valve closes It closes, described into after the second refrigerant recovering mode in the refrigerant shaping modes, step further include: obtain and judge described Whether the second cold medium flux value reaches the third flow preset value in the air-conditioning system；If so, first control valve closes It closes, second control valve is closed, so that the coolant quantity regulating loop enters closed state.
Control method provided by the invention, the refrigerant in refrigerant circulation circuit is compensated or removal process in, lead to It crosses and the cold medium flux for flowing in or out liquid storage device is measured in real time, and the flow value that will test is compared in preset value, By the compensation and removal process materialization to refrigerant, on the one hand, can be further improved to the first control valve and the second control valve Control precision；On the other hand, the quantitative adjusting that the coolant quantity to compensation and recycling may be implemented, avoids coolant quantity adjusted It is not inconsistent with optimal refrigerant amount needed for air-conditioning system operation and influences air-conditioning system and normally run, to improves air-conditioning system Heating effect.
Optionally, the control method further comprises the steps of: after the air-conditioning system enters the refrigerant shaping modes, and When in the coolant quantity regulating loop closed state, coolant quantity reset signal is obtained；
Under the first refrigerant recovering mode, first control valve is closed, and second control valve is opened, and is obtained simultaneously Judge whether the second cold medium flux value reaches the first flow preset value；If so, close first control valve and Second control valve；
Under the first refrigerant compensation model, first control valve is opened, and second control valve is closed；It obtains simultaneously Judge whether the first cold medium flux value reaches the second flow preset value；If so, close first control valve and Second control valve.Opening or closing for the first control valve and the second control valve is controlled, so that cold in refrigerant circulation circuit Matchmaker measures value back to normal；Compressor is out of service.
Control method provided by the invention, under air-conditioning system refrigeration mode, after receiving coolant quantity reset signal, air-conditioning System runs refrigerant reforestation practices, and the control that flow value is opened or closed as the first control valve of control and the second control valve Parameter, to realize the portion that refrigerant extra in refrigerant circulation circuit returns air-conditioning system, will be recovered in refrigerant circulation circuit Refrigerant is divided to withdraw, so that the coolant quantity value back to normal in refrigerant circulation circuit, guarantees the stable operation of air-conditioning system.
Optionally, the control method further comprises the steps of: after the air-conditioning system enters the refrigerant shaping modes, And when being in the coolant quantity regulating loop closed state, coolant quantity reset signal is obtained；In the second refrigerant compensation model Under, first control valve is closed, and second control valve is opened；It obtains and judges whether the second cold medium flux value reaches The 4th flow preset value；If so, closing first control valve and second control valve；It is returned in second refrigerant Under receipts mode, first control valve is opened, and second control valve is closed；It obtains and judges that the first cold medium flux value is It is no to reach the third flow preset value；If so, closing first control valve and second control valve.
Control method provided by the invention, under air-conditioning system heating mode, after receiving coolant quantity reset signal, air-conditioning System runs refrigerant reforestation practices, and the control that flow value is opened or closed as the first control valve of control and the second control valve Parameter, to realize the portion that refrigerant extra in refrigerant circulation circuit returns air-conditioning system, will be recovered in refrigerant circulation circuit Refrigerant is divided to withdraw, so that the coolant quantity value back to normal in refrigerant circulation circuit, guarantees the stable operation of air-conditioning system.
Optionally, the acquisition coolant quantity reset signal includes: reception off signal；Or, the indoor ring more described in real time After border temperature and the temperature preset value, receives and determine the closable signal of coolant quantity regulating loop.
Control method provided by the invention will shut down or determine that air-conditioning system is operated normally as cold in refrigerant circulation circuit Matchmaker measures the signal for returning to original state, improves the operational reliability of air-conditioning system, avoids due to system caused by replying not in time The case where cold or heating effect is bad or fluctuation of service.
Optionally, it is the second under refrigeration mode that the coolant quantity of the liquid storage device can be flowed out by, which presetting in the air-conditioning system, Measure the 4th flow preset value under preset value and heating mode；Wherein, refrigerant capacity preset in the liquid storage device is at least institute State the maximum value in second flow preset value and the 4th flow preset value.
Guarantee there are enough refrigerants for compensating the coolant quantity in refrigerant circulation circuit in this way, avoids due to pre- in fluid reservoir The coolant quantity set is less and leads to not optimal refrigerant amount needed for reaching air-conditioning system operation not, avoids reducing air-conditioning system Refrigeration or heating effect.
Optionally, it is the second under refrigeration mode that the coolant quantity of the liquid storage device can be flowed out by, which presetting in the air-conditioning system, Measure the 4th flow preset value under preset value and heating mode；The refrigerant that can flow into the liquid storage device is preset in the air-conditioning system Amount is the third flow preset value under first flow preset value and heating mode under refrigeration mode；Wherein, the liquid storage device Volume is at least the sum of the first flow preset value and the second flow preset value, and, the third flow preset value with Maximum value in the sum of described 4th flow preset value.
It can guarantee in this way in air-conditioning underrun, liquid storage device can recycle refrigerant circulation circuit by enough spaces In refrigerant, reduce compressor work, to reduce power consumption, improve air-conditioning system efficiency.
The third object of the present invention is to propose a kind of air conditioner, be transported with solving existing air conditioner in high load capacity or underload Under row state, be unable to reach the optimal refrigerant amount of air-conditioning system, thus occur freezing or heating effect is bad, fluctuation of service or The low problem of Energy Efficiency Ratio.
To solve the above problems, the technical scheme of the present invention is realized as follows:
A kind of air conditioner, computer readable storage medium and processor including being stored with computer program, the calculating When machine program is read and run by the processor, the control method of change coolant quantity air-conditioning system as described above is realized.
The control method of the air conditioner and above-mentioned change coolant quantity air-conditioning system compared with the existing technology possessed by advantage Identical, details are not described herein.
Detailed description of the invention
The attached drawing for constituting a part of the invention is used to provide further understanding of the present invention, schematic reality of the invention It applies example and its explanation is used to explain the present invention, do not constitute improper limitations of the present invention.
In the accompanying drawings:
Fig. 1 is refrigerant circulation structural schematic diagram under air-conditioning system refrigeration mode of the present invention；
Fig. 2 is refrigerant circulation structural schematic diagram under air-conditioning system heating mode of the present invention；
Fig. 3 accurately detects the refrigerant for flowing into and out liquid storage device by flowmeter to be of the present invention, and flow value is made To control the control parameter that the first control valve and the second control valve open or close, so as to improve the operational reliability of air-conditioning system Flow chart；
Fig. 4 is the flow chart of the control method under air-conditioning system refrigeration mode of the present invention；
Fig. 5 is the flow chart of the control method under air-conditioning system heating mode of the present invention.
Description of symbols:
1- compressor, 2- four-way reversing valve, 3- indoor heat exchanger, 4- throttle valve, 5- outdoor heat exchanger, 6- liquid storage device, 7- First pipeline, the second pipeline of 8-, the first control valve of 9-, the second control valve of 10-, 11- first flowmeter, 12- second flowmeter.
Specific embodiment
It should be noted that in the absence of conflict, the feature in embodiment and embodiment in the present invention can phase Mutually combination.
In addition, being briefly described to orientation is related in the specific embodiment: following on the " top for mentioning each structural member End ", " bottom end " these positional relationships are merely for convenience of description and simplification description, rather than the device of indication or suggestion meaning must There must be specific orientation, be constructed and operated in a specific orientation, therefore be not considered as limiting the invention.In addition, if The description of " first ", " second " etc. is related in the embodiment of the present invention, then the description for being somebody's turn to do " first ", " second " etc. is only used for describing Purpose is not understood to indicate or imply its relative importance or implicitly indicates the quantity of indicated technical characteristic.By This defines " first ", the feature of " second " can explicitly or implicitly include at least one of the features.
In general, the charging amount of the refrigerant of air-conditioning system is fixed and invariable, and there are an optimum values；Refrigerant is in air-conditioning System internal circulation flow realizes refrigerating operaton or heating operation, adjusts indoor environment temperature, guarantees that indoor environment temperature reaches and set Definite value.However want to reach the optimum value of cooling or heating capacity it is necessary to enable the evaporation in heat exchanger to be fully completed.And it is empty When adjusting system is in different operating conditions, it is different for reaching coolant quantity required for optimum operating condition, such as: in air-conditioning system When underrun, required coolant quantity is slightly smaller than rated value；And in heavy-duty service, required coolant quantity then can be slightly Greater than rated value.If cannot be adjusted in time to the coolant quantity in refrigerant circulation circuit, under unusual service condition, sky can not be made Adjusting system is run under optimal refrigerant amount state, to occur freezing or heating effect is bad, fluctuation of service or Energy Efficiency Ratio are low The case where.
To solve the above problems, the present invention provides a kind of change coolant quantity air-conditioning system and its control methods, by cold Increase coolant quantity regulating loop in matchmaker's circulation loop, and controls the operation shape of coolant quantity regulating loop according to outdoor environment temperature State in time supplements the refrigerant in refrigerant circulation circuit, or absorbs the refrigerant in the refrigerant circulation circuit of part, so as to have leisure Adjusting system is able to maintain to be run under optimal refrigerant amount state, guarantees the heating or refrigeration effect of air-conditioning system.
To make the above purposes, features and advantages of the invention more obvious and understandable, with reference to the accompanying drawing to the present invention Specific embodiment be described in detail.
As shown in connection with fig. 1, the present invention provides a kind of change coolant quantity air-conditioning systems, including refrigerant circulation circuit, refrigerant to follow Loop back path includes compressor 1, four-way reversing valve 2, indoor heat exchanger 3, throttle valve 4 and outdoor heat exchanger 5, and air-conditioning system is also wrapped The coolant quantity regulating loop being connected with refrigerant circulation circuit is included, coolant quantity regulating loop includes: that there are two the liquid storage devices of port for tool 6, the first port of liquid storage device 6 passes through the pipeline connection between the first pipeline 7 and four-way reversing valve 2 and outdoor heat exchanger 5, liquid storage The second port of device 6 passes through the pipeline connection between the second pipeline 8 and throttle valve 4 and indoor heat exchanger 3；First pipeline 7, second The first control valve 9 and the second control valve 10 connecting with same controller are correspondingly provided on pipeline 8；Wherein, in liquid storage device 6 in advance It is perfused with a certain amount of refrigerant.
Specifically, air-conditioning system includes the compressor 1 being sequentially communicated by connecting tube, four-way reversing valve 2, indoor heat exchanger 3, throttle valve 4, outdoor heat exchanger 5, the outdoor heat exchanger 5 are connected to further through four-way reversing valve 2 with compressor 1, are formed refrigerant and are followed Loop back path.Wherein, air-conditioning system further includes coolant quantity regulating loop, and coolant quantity regulating loop is connect with refrigerant circulation circuit to be used in combination Coolant quantity in adjusting refrigerant circulation circuit.Coolant quantity regulating loop includes liquid storage device 6, is connected to respectively with 6 both ends of liquid storage device The first pipeline 7 and the second pipeline 8, and the first control valve 9 and the second control are provided on the first pipeline 7 and the second pipeline 8 Valve 10.By controlling the opening and closing of the first control valve 9 and the second control valve 10, it is timely that coolant quantity regulating loop may be implemented Adjusting to the coolant quantity in refrigerant circulation circuit guarantees the stable operation of air-conditioning system.
When air-conditioning system is run in cooling mode, gaseous refrigerant is flowed out by compressor 1 through four-way reversing valve 2, warp After being condensed into the refrigerant of liquid by outdoor heat exchanger 5, flow to indoor heat exchanger 3 through throttle valve 4, and indoors in heat exchanger 3 into Row evaporation, the refrigerant after completing evaporation flows into compressor 1 through four-way reversing valve 2 again, into next circulation.
Since the pipeline between the first pipeline 7 and four-way reversing valve 2 and outdoor heat exchanger 5 of coolant quantity regulating loop connects It is logical, the pipeline connection between the second pipeline 8 and throttle valve 4 and indoor heat exchanger 3；When the coolant quantity in refrigerant circulation circuit is greater than When optimal refrigerant amount, when can open the first control valve 9, the gaseous coolant flowed out by four-way reversing valve 2 is flowed into liquid storage device 6 Storage, until closing the first control valve 9 after the coolant quantity in air-conditioning system is in optimum state.And when in refrigerant circulation circuit Coolant quantity when being less than optimal refrigerant amount, can control the unlatching of the second control valve 10, preset refrigerant flows directly into liquid storage device 6 Indoor heat exchanger 3, to compensate the coolant quantity in refrigerant circulation circuit, until the coolant quantity in air-conditioning system is in optimum state Afterwards, the second control valve 10 is closed.
Correspondingly, as shown in connection with fig. 2, when air-conditioning system is run in a heating mode, gaseous refrigerant is passed through by compressor 1 Four-way reversing valve 2 flows out, and after being condensed into the refrigerant of liquid via indoor heat exchanger 3, flows to outdoor heat exchanger 5 through throttle valve 4, and It is evaporated in outdoor heat exchanger 5, the refrigerant after completing evaporation flows into compressor 1 through four-way reversing valve 2 again, enters Next circulation.When the coolant quantity in refrigerant circulation circuit is greater than optimal refrigerant amount, the second control valve 10 can be opened, by room The liquid refrigerants that interior heat exchanger 3 flows out is flowed into liquid storage device 6 and is stored, until the coolant quantity in air-conditioning system is in optimum state Afterwards, the second control valve 10 is closed.And when the coolant quantity in refrigerant circulation circuit is less than optimal refrigerant amount, it can control the first control Valve 9 processed is opened, and preset refrigerant flows to interior compression machine 1 by four-way reversing valve 2 under the action of pressure difference in liquid storage device 6, To compensate the coolant quantity in refrigerant circulation circuit, until closing the second control after the coolant quantity in air-conditioning system is in optimum state Valve 10 processed.
As can be seen that under air-conditioning system low load condition, namely under heating outside high temperature and refrigeration outside low-temperature condition, By reducing the coolant quantity in refrigerant circulation circuit, power consumed by 1 system of compressor can be reduced, so as to promote air-conditioning The efficiency of system.
And pass through under the condition of high temperature under air-conditioning system higher load condition, namely on the outside of heating outside low temperature and refrigeration Increase cold medium flux, delivery temperature can be reduced, reduce outer coil temperature and pressure (refrigeration outside high temperature), can also be delayed outer Machine frosting promotes heating effect (heating outside low temperature), so that reaching enables unit to operate normally, enhances the mesh of user experience 's.
Air-conditioning system provided by the invention, by being arranged first on liquid storage device 6 and the pipeline being connected to 6 both ends of liquid storage device Control valve 9 and the second control valve 10 make to have leisure under the cooperation between liquid storage device 6, the first control valve 9 and the second control valve 10 No matter adjusting system runs under refrigeration mode or heating mode, can be by coolant quantity regulating loop to refrigerant circulation circuit In coolant quantity be adjusted, to control the coolant quantity of global cycle in air-conditioning system, guarantee the optimal refrigerant of air-conditioning system operation Amount increases the heating and refrigeration effect of air-conditioning system to play heat exchanger efficiency to greatest extent, improves operation of air conditioner efficiency.
In addition, be provided with first flowmeter 11 on the first pipeline 7, it is provided with second flowmeter 12 on the second pipeline 8, first Flowmeter 11 and second flowmeter 12 are used to the flow value that detection flows into liquid storage device 6 or the refrigerant flowed out from liquid storage device 6.Not With under operating condition, air-conditioning system needs the coolant quantity for recycling or compensating to be all different, and the specific data of these coolant quantities are according to research and development The setting of personnel's experience, or by being obtained according to test of the different type of machines under different operating conditions.Therefore, at the both ends of liquid storage device 6 point Not She Zhi flowmeter, can more accurately the coolant quantity in refrigerant circulation circuit be controlled, be avoided because recycling or compensating Optimal refrigerant amount needed for coolant quantity and air-conditioning system operation is not inconsistent and influences the phenomenon that air-conditioning system is normally run, and protects Demonstrate,prove the refrigeration or heating effect of air-conditioning system.
Based on the above embodiment, air-conditioning system further includes detection device, which is temperature sensor, is arranged in sky On the outdoor unit of adjusting system, it can be used for detecting outdoor environment temperature.If it is understood that when outdoor environment temperature is lower Coolant quantity is smaller, will affect the heating effect of air-conditioning system, when outdoor environment temperature is smaller compared with Gao Shiruo coolant quantity, will affect sky The refrigeration effect of adjusting system.By the way that detection device is arranged, outdoor environment temperature can be monitored in real time, and according to outdoor environment temperature Judge whether the coolant quantity in refrigerant circulation circuit needs to adjust, further improves the operation stability of air-conditioning system.
As shown in connection with fig. 3, the control for the change coolant quantity air-conditioning system that the present invention also provides a kind of as described in above-described embodiment Method processed, comprising steps of
S1, air-conditioning system heating or refrigeration mode under, detect indoor environment temperature Tw；
S2, compare temperature preset value in indoor environment temperature Tw and air-conditioning system, judgement opens or closes coolant quantity tune Circuit is saved, so that air-conditioning system is followed by the first control valve 9 of control, opening or closing into adjusting refrigerant for the second control valve 10 The refrigerant shaping modes of coolant quantity in loop back path.That is, controlling the first control valve according to indoor environment temperature and temperature preset value 9, second control valve 10 opens or closes, so that air-conditioning system enters refrigerant shaping modes, by liquid storage device 6 to refrigerant circulation Increase refrigerant in circuit or recycles the part refrigerant in refrigerant circulation circuit；Wherein, the refrigerant shaping modes include: first cold Matchmaker's take-back model, the first refrigerant compensation model, the second refrigerant recovering mode and the second refrigerant compensation model.
According to the characterization of air-conditioning system, outdoor environment temperature can reflect out cold in the refrigerant circulation circuit of air-conditioning system Matchmaker's amount compared to optimal refrigerant amount is on the high side or on the low side, namely reflects whether air-conditioning system is in overload or underload State.Wherein, the low load condition of air-conditioning system includes refrigeration outside low temperature and heating outside high temperature, and higher load condition includes Refrigeration outside high temperature and heating outside low temperature.For example outdoor environment temperature is high, illustrates in refrigerant circulation circuit in cooling mode Coolant quantity compared to optimal refrigerant amount be it is on the low side, need to compensate refrigerant, namely the first refrigerant compensation model of operation；Another party Face, also illustrate the coolant quantity in refrigerant circulation circuit in a heating mode compared to optimal refrigerant amount be it is on the high side, need part Refrigerant circulation circuit, namely the second refrigerant recovering mode of operation is discharged in refrigerant.Correspondingly, for example outdoor environment temperature is low, explanation The coolant quantity in refrigerant circulation circuit is on the low side compared to optimal refrigerant amount in a heating mode, needs to compensate refrigerant, Ye Jiyun Row the second refrigerant compensation model also illustrates that the coolant quantity in refrigerant circulation circuit in cooling mode is compared to optimal refrigerant amount It is on the high side, need for part refrigerant to be discharged refrigerant circulation circuit, namely the first refrigerant recovering mode of operation.
Required optimal refrigerant amount can change with the variation of outdoor environment temperature in refrigerant circulation circuit, therefore, Using the indoor environment temperature under air conditioner heat-production or refrigeration mode as increase or recycling refrigerant control parameter, can be improved to The control precision that refrigerant is compensated or recycled in refrigerant circulation circuit prevents from not needing adjustment coolant quantity when progress in air-conditioning system Maloperation improves the operation stability and operational energy efficiency of air-conditioning system.
As shown in connection with fig. 4, wherein the temperature in comparison indoor environment temperature Tw and air-conditioning system described in step S2 is default Value, judgement open or close coolant quantity regulating loop, so that air-conditioning system passes through control the first control valve 9, the second control valve 10 Open or close into adjust refrigerant circulation circuit in coolant quantity refrigerant shaping modes, comprising steps of
Under air-conditioning system refrigeration mode, by the first temperature preset value in indoor environment temperature Tw and temperature preset value Tw1, second temperature preset value Tw2 are compared；
If indoor environment temperature Tw < the first temperature preset value Tw1, the first control valve 9 is opened, and the second control valve 10 closes It closes, into the first refrigerant recovering mode in refrigerant shaping modes, to recycle the part refrigerant in refrigerant circulation circuit；
If indoor environment temperature Tw > second temperature preset value Tw2, the first control valve 9 is closed, and the second control valve 10 is opened It opens, into the first refrigerant compensation model in refrigerant shaping modes, to increase refrigerant into refrigerant circulation circuit；
If the first temperature preset value Tw1≤temperature preset value of indoor environment temperature Tw≤first Tw2, the first control valve 9 It closes, the second control valve 10 is closed, so that the coolant quantity regulating loop in air-conditioning system enters closed state, air-conditioning system is normal Operation.
Wherein, the first temperature preset value Tw1 and second temperature preset value Tw2 can be according to the real work ring of air-conditioning system Border is set by staff.
In cooling mode, when detecting Tw < Tw1, illustrate that the coolant quantity in refrigerant circulation circuit is cold compared to best Matchmaker amount be it is on the high side, air-conditioning system be in low load condition, need by part refrigerant discharge refrigerant circulation circuit, to reduce compression Power consumed by 1 system of machine.The first control valve 9 is opened at this time, closes the second control valve 10, it is cold when using Air Conditioning Cycle Matchmaker has the phenomenon that different pressure differences in different location, by the part refrigerant indentation liquid storage device 6 in refrigerant circulation circuit, realizes back Receive the purpose of refrigerant.
And when detecting Tw > Tw2, illustrate the coolant quantity in refrigerant circulation circuit compared to optimal refrigerant amount be it is on the low side, Air-conditioning system is in higher load condition, needs to compensate refrigerant, thus reduce by 1 delivery temperature of compressor, reduce outer coil temperature and Pressure；At this point, closing the first control valve 9, the second control valve 10 is opened, it can automatically will be pre- in liquid storage device 6 during refrigerant circulation Circulation is participated in the refrigerant sucking refrigerant circulation circuit set.
It is understood that not needed when monitoring that Tw1≤Tw≤Tw2 is to illustrate that air-conditioning system is under nominal situation Coolant quantity in refrigerant circulation circuit is adjusted, normal operation, wherein under under air-conditioning system normal operating condition, First control valve 9 and the second control valve 10 are in closed state.
Control method provided by the invention by the first temperature preset value of setting and second temperature preset value, and will test Outdoor environment temperature be compared with preset value, by judging result by the operation of the first control valve 9 and the second control valve 10 State embodies, and can further increase in cooling mode and whether refrigerant be compensated or recycled to refrigerant circulation circuit Accuracy of judgement degree, and then be conducive to further increase the operational energy efficiency of air-conditioning system.
As shown in connection with fig. 5, since air-conditioning system is by the two kinds of operational modes that heat and freeze, correspondingly, described in step S2 Compare the temperature preset value in indoor environment temperature Tw and air-conditioning system, judgement opens or closes coolant quantity regulating loop, so that Air-conditioning system by control the first control valve 9, the second control valve 10 open or close into adjust refrigerant circulation circuit in it is cold The refrigerant shaping modes of matchmaker's amount, further comprise the steps of:
Under air-conditioning system heating mode, by indoor environment temperature and third temperature preset value, the 4th temperature preset value into Row compares；
If indoor environment temperature Tw < third temperature preset value Tw3, the first control valve 9 is opened, and the second control valve 10 closes It closes, into the second refrigerant compensation model in refrigerant shaping modes, to increase refrigerant into refrigerant circulation circuit；
If the 4th temperature preset value Tw4 of indoor environment temperature Tw >, the first control valve 9 is closed, and the second control valve 10 is opened It opens, into the second refrigerant recovering mode in refrigerant shaping modes, to recycle the part refrigerant in refrigerant circulation circuit；
If the third temperature preset value Tw3≤temperature of indoor environment temperature Tw≤the 4th preset value Tw4, the first control valve 9 It closes, the second control valve 10 is closed, so that the coolant quantity regulating loop in the air-conditioning system enters closed state, air-conditioning System operates normally.
Wherein, the first temperature preset value Tw1 and second temperature preset value Tw2 can be according to the real work ring of air-conditioning system Border is set by staff.
It is understood that the loop direction of refrigerant is opposite under air-conditioning system refrigeration and heating mode.Therefore, it is heating Under mode, when detecting Tw < Tw3, illustrate that the coolant quantity in refrigerant circulation circuit is on the low side, sky compared to optimal refrigerant amount Adjusting system is in higher load condition, needs to compensate refrigerant, to reduce by 1 delivery temperature of compressor, reduce outer coil temperature and pressure Power；It opens the first control valve 9 at this time, closes the second control valve 10, it can automatically will be preset in liquid storage device 6 during refrigerant circulation Refrigerant, which sucks, participates in circulation in refrigerant circulation circuit.
And when detecting Tw > Tw4, illustrate the coolant quantity in refrigerant circulation circuit compared to optimal refrigerant amount be it is on the high side, Air-conditioning system is in low load condition, needs part refrigerant refrigerant circulation circuit is discharged, be disappeared to reduce by 1 system of compressor The power of consumption, improving energy efficiency；At this point, closing the first control valve 9, the second control valve 10 is opened, it is cold when using Air Conditioning Cycle Matchmaker has the phenomenon that different pressure differences in different location, by the part refrigerant indentation liquid storage device 6 in refrigerant circulation circuit, realizes back Receive the purpose of refrigerant.
When monitoring that Tw3≤Tw≤Tw4 is to illustrate that air-conditioning system is under nominal situation, do not need to return refrigerant circulation Coolant quantity in road is adjusted, normal operation, wherein under under air-conditioning system normal operating condition, the first control valve 9 with Second control valve 10 is in closed state.
Control method provided by the invention by setting third temperature preset value and the 4th temperature preset value, and will test Outdoor environment temperature be compared with preset value, by judging result by the operation of the first control valve 9 and the second control valve 10 State embodies, and can further increase in a heating mode and whether refrigerant be compensated or recycled to refrigerant circulation circuit Accuracy of judgement degree, and then be conducive to further increase the operational energy efficiency of air-conditioning system.
In conjunction with shown in Fig. 4-5, specifically, the detection of first flowmeter 11 obtains the first cold medium flux value, second flowmeter 12 It detects and obtains the second cold medium flux value, in the control method provided in an embodiment of the present invention for becoming coolant quantity air-conditioning system:
Into the first refrigerant recovering mode comprising steps of the first control valve 9 is opened, the second control valve 10 is closed, entering After the first refrigerant recovering mode in refrigerant shaping modes, step further include: obtain and whether judge the first cold medium flux value q1 Reach first flow preset value Q1；If so, the first control valve 9 is closed, the second control valve 10 is closed, so that the coolant quantity tune Section circuit enters closed state；
It include: that the first control valve 9 is closed into the first refrigerant compensation model, the second control valve 10 is opened, and refrigerant is being entered After the first refrigerant compensation model in shaping modes, step further include: obtain and judge whether the second cold medium flux value q2 is greater than Second flow preset value Q2；If so, the first control valve 9 is closed, the second control valve 10 is closed, so that the coolant quantity is adjusted back Road enters closed state；
It include: that the first control valve 9 is opened into the second refrigerant compensation model, the second control valve 10 is closed, in the entrance After the second refrigerant compensation model in the refrigerant shaping modes, step further include: obtain and judge the first cold medium flux value q1 Whether the 4th flow preset value Q4 is greater than；If so, the first control valve 9 is closed, the second control valve 10 is closed, so that the refrigerant Amount regulating loop enters closed state；
It include: that the first control valve 9 is opened, the second control valve 10 is closed into the second refrigerant recovering mode, in the entrance After the second refrigerant recovering mode in the refrigerant shaping modes, step further include: obtain and judge the second cold medium flux value q2 Whether third flow preset value Q3 is greater than；If so, the first control valve 9 is closed, the second control valve 10 is closed, so that the refrigerant Amount regulating loop enters closed state.
Control method provided in an embodiment of the present invention is compensating the refrigerant in refrigerant circulation circuit or removal process In, it is carried out by the flow value that the cold medium flux for flowing in or out liquid storage device 6 is measured in real time, and will test in preset value Compare, by the compensation and removal process materialization to refrigerant, on the one hand, can be further improved to the first control valve 9 and second The control precision of control valve 10；On the other hand, the quantitative adjusting that the coolant quantity to compensation and recycling may be implemented, after avoiding adjustment The operation of coolant quantity and air-conditioning system needed for optimal refrigerant amount be not inconsistent and influence air-conditioning system and normally run, to improve sky The refrigeration or heating effect of adjusting system.
As shown in connection with fig. 3, in the control method of air-conditioning system after step S2 air-conditioning system enters refrigerant shaping modes, and When in the coolant quantity regulating loop closed state, further includes:
S3, after air-conditioning system enters refrigerant shaping modes (namely the first refrigerant recovering mode, the first refrigerant compensate mould Under formula, the second refrigerant recovering mode or the second refrigerant compensation model), obtain coolant quantity reset signal；
S4, the first control valve 9 of control, the second control valve 10 open or close, so that the coolant quantity in refrigerant circulation circuit Value back to normal；
If S5, receiving off signal, after coolant quantity value back to normal, compressor is out of service；If according to obtaining in real time It takes indoor environment temperature and temperature preset value, determines that air-conditioning system is in normal running (operation) conditions, then after coolant quantity value back to normal, Air-conditioning system still maintains normal operating condition.
Wherein, obtaining coolant quantity reset signal includes: reception off signal；Or, indoor environment temperature and temperature are pre- in real time If after value, receiving and determining the closable signal of coolant quantity regulating loop.
That is, opening the coolant quantity regulating loop being turned off, and when under air-conditioning system shutdown and normal operation with cold As parameter, the coolant quantity adjusted into refrigerant circulation circuit restores to initial value matchmaker's flow value.It is understood that the reality When compare indoor environment temperature and temperature preset value after, receive determine the closable signal of coolant quantity regulating loop, can close Condition (air-conditioning system operate normally condition) are as follows: under the first refrigerant recovering mode, Tw >=Tw1；First refrigerant compensates mould Formula Tw≤Tw2；Under second refrigerant recovering mode, Tw≤Tw4；Under second refrigerant compensation model, Tw >=Tw3 sentences when meeting these When fixed condition, illustrate that air-conditioning is in normal operation mode, needs to guarantee that the coolant quantity in refrigerant circulation circuit is back to normal at this time Value.
Since air-conditioning system is in operation the first refrigerant recovering mode, the first refrigerant compensation model, the second refrigerant recovering mode Or second after refrigerant compensation model, makes an adjustment to the coolant quantity in refrigerant circulation circuit, to avoid running again after shut down When, there are the feelings of fluctuation of service or loss power since the coolant quantity in refrigerant circulation circuit is higher or lower than normal value Condition, after receiving off signal, air-conditioning system runs refrigerant reforestation practices, and refrigerant extra in refrigerant circulation circuit is returned Air-conditioning system withdraws the part refrigerant being recovered in refrigerant circulation circuit, so that the coolant quantity in refrigerant circulation circuit is replied Normal value guarantees the stable operation of air-conditioning system.
In conjunction with shown in Fig. 4-5, according to the difference of air-conditioning system operating status, refrigerant reforestation practices correspond to different controlling parties Method.Specifically, being adjusted after air-conditioning system enters refrigerant shaping modes, and in coolant quantity under air-conditioning system refrigeration mode When the closed state of circuit, coolant quantity reset signal is obtained；
Under the first refrigerant recovering mode, the first control valve 9 is closed, and the second control valve 10 is opened, and is obtained and is judged second Whether cold medium flux value q2 reaches first flow preset value Q1；If so, closing the first control valve 9 and the second control valve 10；
Under the first refrigerant compensation model, the first control valve 9 is opened, and the second control valve 10 is closed；It obtains and judges first Whether cold medium flux value q1 reaches second flow preset value Q2；If so, closing the first control valve 9 and the second control valve 10.
Under air-conditioning system heating mode, adjusted back after air-conditioning system enters refrigerant shaping modes, and in coolant quantity When the closed state of road, coolant quantity reset signal is obtained；
Under the second refrigerant compensation model, the first control valve 9 is closed, and the second control valve 10 is opened；It obtains and judges second Whether cold medium flux value q2 reaches the 4th flow preset value Q4；If so, closing the first control valve 9 and the second control valve 10；
Under the second refrigerant recovering mode, the first control valve 9 is opened, and the second control valve 10 is closed；It obtains and judges first Whether cold medium flux value q1 reaches third flow preset value Q3；If so, closing the first control valve 9 and the second control valve 10.
Under the first refrigerant recovering mode, the refrigerant of the Q1 content in refrigerant circulation circuit is entered in liquid storage device 6, quite In participating in, the running coolant quantity of air-conditioning system is reduced namely the coolant quantity of Air Conditioning Cycle is in abnormal.Therefore, In After receiving off signal, or it is unsatisfactory for when Tw < Tw1 condition (namely acquisition coolant quantity reset signal), this part is cold Matchmaker returns in refrigerant circulation circuit from liquid storage device 6, so as to improve the operational reliability of air-conditioning system.
Correspondingly, under the first refrigerant compensation model, the refrigerant of Q2 content is entered in refrigerant circulation circuit in liquid storage device 6, Be equivalent to participate in the running coolant quantity of air-conditioning system increase namely the coolant quantity of Air Conditioning Cycle be in it is abnormal.Cause This, after receiving off signal, or is unsatisfactory for when Tw > Tw2 condition (namely acquisition coolant quantity reset signal), by this Part refrigerant returns to liquid storage device 6 from refrigerant circulation circuit, so as to improve the operational reliability of air-conditioning system.
It is understood that the second refrigerant recovering mode and above-mentioned first refrigerant recovering mode, the second refrigerant compensation model It is similar to the refrigerant restoration methods of above-mentioned first refrigerant compensation model, it is only necessary to which that corresponding adjustment determines what air-conditioning system operated normally Condition, here, no longer repeating one by one.
It is provided in an embodiment of the present invention become coolant quantity air-conditioning system control method, by flowmeter accurately detect into Flow out the refrigerant of liquid storage device 6, and the control that flow value is opened or closed as the first control valve 9 of control and the second control valve 10 Parameter, so as to improve the operational reliability of air-conditioning system.
From above-described embodiment description as can be seen that the default coolant quantity that can flow out liquid storage device 6 is refrigeration mould in air-conditioning system Second flow preset value Q2 under formula and the 4th flow preset value Q4 under heating mode；Liquid storage can be flowed by presetting in air-conditioning system The coolant quantity of device 6 is the third flow preset value Q3 under first flow preset value Q1 and heating mode under refrigeration mode.
Wherein, refrigerant capacity preset in liquid storage device 6 is at least second flow preset value Q2 and the 4th flow is default Maximum value in value Q4.This is because in cooling mode, when Tw > Tw2 is the refrigerant for needing to increase in refrigerant circulation circuit Amount, at this point, the refrigerant of Q2 content is inhaled into refrigerant circulation circuit in liquid storage device 6；And under heating state, when Tw < Tw3, need Increase the coolant quantity in refrigerant circulation circuit, at this point, the refrigerant of Q4 content is inhaled into refrigerant circulation circuit in liquid storage device 6. Therefore, only when refrigerant capacity preset in liquid storage device 6 is at least second flow preset value Q2 and the 4th flow preset value Maximum value in Q4 just can guarantee that enough refrigerants for compensating the coolant quantity in refrigerant circulation circuit, are avoided due to liquid storage Preset coolant quantity is less in tank and optimal refrigerant amount needed for leading to not to reach air-conditioning system operation not, avoid reducing air-conditioning The refrigeration or heating effect of system.
In addition, the volume of liquid storage device 6 is at least the sum of first flow preset value Q1 and second flow preset value Q2, and, the Maximum value in the sum of three flow preset value Q3 and the 4th flow preset value Q4.
Specifically, as Q1+Q2 > Q3+Q4, V >=Q1+Q2；As Q1+Q2 < Q3+Q4, V >=Q3+Q4.Liquid storage device 6 removes Outside preset refrigerant, in heating or refrigeration mode, it is also necessary to the refrigerant of Q3 content or Q4 content is received, to guarantee in air-conditioning When underrun, liquid storage device 6 can be recycled the refrigerant in refrigerant circulation circuit by enough spaces, reduced compressor 1 and done work, To reduce power consumption, air-conditioning system efficiency is improved.
Wherein, first flow preset value Q1, second flow preset value Q2, third flow preset value Q3 and the 4th flow are default Value Q4 can be set according to the actual working environment of air-conditioning system by staff.
The present invention also provides a kind of air conditioner, which includes the computer-readable storage for being stored with computer program Medium and processor when the computer program is read and run by the processor, realize change coolant quantity as described above The control method of air-conditioning system.
The coolant quantity in refrigerant circulation circuit cannot be adjusted in time compared to existing air conditioner, in unusual service condition Under, air-conditioning system can not be made to run under optimal refrigerant amount state, to occur freezing or heating effect is bad, fluctuation of service Or the situation that Energy Efficiency Ratio is low.Air conditioner provided by the invention, by increasing coolant quantity regulating loop in refrigerant circulation circuit, and The operating status of coolant quantity regulating loop is controlled according to outdoor environment temperature, and the refrigerant in refrigerant circulation circuit is carried out in time Supplement, or the refrigerant in the refrigerant circulation circuit of part is absorbed, it is transported under optimal refrigerant amount state so that air-conditioning system is able to maintain Row, guarantees the heating or refrigeration effect of air-conditioning system.
Although present disclosure is as above, present invention is not limited to this.Anyone skilled in the art are not departing from this It in the spirit and scope of invention, can make various changes or modifications, therefore protection scope of the present invention should be with claim institute Subject to the range of restriction.

Claims (14)

1. a kind of change coolant quantity air-conditioning system, including refrigerant circulation circuit, the refrigerant circulation circuit include four-way reversing valve (2), indoor heat exchanger (3), throttle valve (4) and outdoor heat exchanger (5), which is characterized in that the air-conditioning system further include with The connected coolant quantity regulating loop of the refrigerant circulation circuit, the coolant quantity regulating loop include:
There are two the liquid storage device (6) of port, the first ports of the liquid storage device (6) to pass through the first pipeline (7) and the four-way for tool The second port of pipeline connection between reversal valve (2) and the outdoor heat exchanger (5), the liquid storage device (6) passes through the second pipe Pipeline connection between road (8) and the throttle valve (4) and the indoor heat exchanger (3)；
The first control valve (9) and the second control valve (10) are correspondingly provided on first pipeline (7), second pipeline (8)；
Wherein, refrigerant is preset in the liquid storage device (6).
2. change coolant quantity air-conditioning system according to claim 1, which is characterized in that be provided on first pipeline (7) First flowmeter (11) is provided with second flowmeter (12) on second pipeline (8), the first flowmeter (11) and described Second flowmeter (12) is used to detect the flow value for flowing into the liquid storage device (6) or the refrigerant flowed out from the liquid storage device (6).
3. change coolant quantity air-conditioning system according to claim 1, which is characterized in that the air-conditioning system further includes detection dress It sets, for detecting outdoor environment temperature.
4. a kind of based on the control method for becoming coolant quantity air-conditioning system described in any one of the claims 1-3, feature It is, comprising steps of
Under air-conditioning system heating or refrigeration mode, indoor environment temperature is detected；
Compare the temperature preset value in the indoor environment temperature and the air-conditioning system, judgement opens or closes the coolant quantity Regulating loop so that the air-conditioning system by control first control valve (9), second control valve (10) unlatching or Close the refrigerant shaping modes for entering and adjusting coolant quantity in the refrigerant circulation circuit.
5. the control method according to claim 4 for becoming coolant quantity air-conditioning system, which is characterized in that the room Temperature preset value in interior environment temperature and the air-conditioning system, judgement open or close the coolant quantity regulating loop, so that The air-conditioning system enters adjusting by control first control valve (9), opening or closing for second control valve (10) The refrigerant shaping modes of coolant quantity in the refrigerant circulation circuit, comprising:
It is under the air-conditioning system refrigeration mode, the indoor environment temperature and the first temperature in the temperature preset value is pre- If value, second temperature preset value are compared；
If indoor environment temperature < the first temperature preset value, first control valve (9) is opened, second control valve (10) It closes, into the first refrigerant recovering mode in the refrigerant shaping modes；
If indoor environment temperature > second temperature preset value, first control valve (9) is closed, second control valve (10) It opens, into the first refrigerant compensation model in the refrigerant shaping modes；
If the first temperature preset value≤indoor environment temperature≤the first temperature preset value, first control valve (9) is closed, institute The second control valve (10) closing is stated, so that the coolant quantity regulating loop in the air-conditioning system enters closed state.
6. the control method according to claim 4 for becoming coolant quantity air-conditioning system, which is characterized in that the room Temperature preset value in interior environment temperature and the air-conditioning system, judgement open or close the coolant quantity regulating loop, so that The air-conditioning system enters adjusting by control first control valve (9), opening or closing for second control valve (10) The refrigerant shaping modes of coolant quantity in the refrigerant circulation circuit, further includes:
It is under the air-conditioning system heating mode, the indoor environment temperature and the third temperature in the temperature preset value is pre- If value, the 4th temperature preset value are compared；
If indoor environment temperature < third temperature preset value, first control valve (9) is opened, second control valve (10) It closes, into the second refrigerant compensation model in the refrigerant shaping modes；
If the 4th temperature preset value of indoor environment temperature >, first control valve (9) is closed, second control valve (10) It opens, into the second refrigerant recovering mode in the refrigerant shaping modes；
If third temperature preset value≤indoor environment temperature≤the 4th temperature preset value, first control valve (9) is closed, institute The second control valve (10) closing is stated, so that the coolant quantity regulating loop in the air-conditioning system enters closed state.
7. the control method according to claim 5 for becoming coolant quantity air-conditioning system, which is characterized in that the first flowmeter (11) detection obtains the first cold medium flux value, and second flowmeter (12) detection obtains the second cold medium flux value；The control In method,
The entrance the first refrigerant recovering mode includes: the first control valve (9) unlatching, second control valve (10) It closes, described into after the first refrigerant recovering mode in the refrigerant shaping modes, step further include: obtain and judge institute State whether the first cold medium flux value reaches first flow preset value in the air-conditioning system；If so, first control valve (9) it closes, second control valve (10) is closed, so that the coolant quantity regulating loop enters closed state；
The entrance the first refrigerant compensation model includes: that first control valve (9) is closed, second control valve (10) It opens, described into after the first refrigerant compensation model in the refrigerant shaping modes, step further include: obtain and judge institute State whether the second cold medium flux value reaches second flow preset value in the air-conditioning system；If so, first control valve (9) it closes, second control valve (10) is closed, so that the coolant quantity regulating loop enters closed state.
8. the control method according to claim 6 for becoming coolant quantity air-conditioning system, which is characterized in that the first flowmeter (11) detection obtains the first cold medium flux value, and second flowmeter (12) detection obtains the second cold medium flux value； In the control method,
The entrance the second refrigerant compensation model includes: that first control valve (9) is opened, second control valve (10) It closes, described into after the second refrigerant compensation model in the refrigerant shaping modes, step further include: obtain and judge institute State whether the first cold medium flux value reaches the 4th flow preset value in the air-conditioning system；If so, first control valve (9) it closes, second control valve (10) is closed, so that the coolant quantity regulating loop enters closed state；
The entrance the second refrigerant recovering mode includes: the first control valve (9) unlatching, second control valve (10) It closes, described into after the second refrigerant recovering mode in the refrigerant shaping modes, step further include: obtain and judge institute State whether the second cold medium flux value reaches third flow preset value in the air-conditioning system；If so, first control valve (9) it closes, second control valve (10) is closed, so that the coolant quantity regulating loop enters closed state.
9. the control method according to claim 7 for becoming coolant quantity air-conditioning system, which is characterized in that the control method, It further comprises the steps of:
The air-conditioning system enter the refrigerant shaping modes after, and be in the coolant quantity regulating loop closed state when, Obtain coolant quantity reset signal；
Under the first refrigerant recovering mode, first control valve (9) is closed, and second control valve (10) is opened, and is obtained It takes and judges whether the second cold medium flux value reaches the first flow preset value；If so, closing first control Valve (9) and second control valve (10)；
Under the first refrigerant compensation model, first control valve (9) is opened, and second control valve (10) is closed；It obtains It takes and judges whether the first cold medium flux value reaches the second flow preset value；If so, closing first control Valve (9) and second control valve (10).
10. the control method according to claim 8 for becoming coolant quantity air-conditioning system, which is characterized in that the control method, It further comprises the steps of:
The air-conditioning system enter the refrigerant shaping modes after, and be in the coolant quantity regulating loop closed state when, Obtain coolant quantity reset signal；
Under the second refrigerant compensation model, first control valve (9) is closed, and second control valve (10) is opened；It obtains It takes and judges whether the second cold medium flux value reaches the 4th flow preset value；If so, closing first control Valve (9) and second control valve (10)；
Under the second refrigerant recovering mode, first control valve (9) is opened, and second control valve (10) is closed；It obtains It takes and judges whether the first cold medium flux value reaches the third flow preset value；If so, closing first control Valve (9) and second control valve (10).
11. the control method according to claim 9 or 10 for becoming coolant quantity air-conditioning system, which is characterized in that the acquisition Coolant quantity reset signal includes:
Receive off signal；
Or,
After the real-time indoor environment temperature and the temperature preset value, receives and determine that the coolant quantity regulating loop can The signal of closing.
12. the control method according to claim 4 for becoming coolant quantity air-conditioning system, which is characterized in that the air-conditioning system In preset can flow out the liquid storage device coolant quantity be refrigeration mode under second flow preset value and heating mode under the 4th Flow preset value；
Wherein, refrigerant capacity preset in the liquid storage device (6) is at least the second flow preset value and the 4th flow Maximum value in preset value.
13. the control method according to claim 4 for becoming coolant quantity air-conditioning system, which is characterized in that the air-conditioning system In preset can flow out the liquid storage device coolant quantity be refrigeration mode under second flow preset value and heating mode under the 4th Flow preset value；The default coolant quantity that can flow into the liquid storage device is that the first flow under refrigeration mode is pre- in the air-conditioning system If the third flow preset value under value and heating mode；
Wherein, the volume of the liquid storage device (6) is at least the sum of the first flow preset value and the second flow preset value, With maximum value in the sum of the third flow preset value and the 4th flow preset value.
14. a kind of air conditioner, which is characterized in that computer readable storage medium and processing including being stored with computer program Device when the computer program is read and run by the processor, realizes the change as described in any one of claim 4-13 The control method of coolant quantity air-conditioning system.
CN201910852463.3A 2019-09-09 2019-09-09 A kind of change coolant quantity air-conditioning system and its control method Pending CN110529966A (en)

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