CN108759007A - Control method, system and the air-conditioning of air-conditioning system - Google Patents

Control method, system and the air-conditioning of air-conditioning system Download PDF

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Publication number
CN108759007A
CN108759007A CN201810600438.1A CN201810600438A CN108759007A CN 108759007 A CN108759007 A CN 108759007A CN 201810600438 A CN201810600438 A CN 201810600438A CN 108759007 A CN108759007 A CN 108759007A
Authority
CN
China
Prior art keywords
heat exchanger
threshold
temperature
expansion valve
aperture
Prior art date
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
CN201810600438.1A
Other languages
Chinese (zh)
Inventor
王新利
许永锋
熊美兵
冯明坤
赵浩伟
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.)
Midea Group Co Ltd
Guangdong Midea HVAC Equipment Co Ltd
Original Assignee
Midea Group Co Ltd
Guangdong Midea HVAC Equipment Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Midea Group Co Ltd, Guangdong Midea HVAC Equipment Co Ltd filed Critical Midea Group Co Ltd
Priority to CN201810600438.1A priority Critical patent/CN108759007A/en
Publication of CN108759007A publication Critical patent/CN108759007A/en
Pending legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00Control or safety arrangements
    • F24F11/62Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63Electronic processing
    • F24F11/64Electronic processing using pre-stored data
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00Control or safety arrangements
    • F24F11/62Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63Electronic processing
    • F24F11/65Electronic processing for selecting an operating mode
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00Control or safety arrangements
    • F24F11/70Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/83Control 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
    • F24F11/84Control 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
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00Control or safety arrangements
    • F24F11/88Electrical aspects, e.g. circuits

Abstract

The invention discloses a kind of control method of air-conditioning system, system and air-conditionings.Wherein, the control method of air-conditioning system, including:Under heating mode after the compressor operating predetermined time, judge the first refrigerant coefficient whether between the first lower threshold and the first upper limit threshold;If the first refrigerant coefficient between the first lower threshold and the first upper limit threshold, the aperture of electronic expansion valve of indoor unit is adjusted according to the line temperature of indoor heat exchanger, in time to change refrigerant circulation;If the first refrigerant coefficient is more than the first upper limit threshold, increase the aperture of electronic expansion valve of indoor unit, otherwise reduces the aperture of electronic expansion valve of indoor unit.The control method of the air-conditioning system of the present invention can make air-conditioning system be in best refrigerant circulation always, ensure that air-conditioning system is run in a manner of more energy-efficient, promote usage experience.

Description

Control method, system and the air-conditioning of air-conditioning system
Technical field
The present invention relates to a kind of air-conditioning equipment field more particularly to control method of air-conditioning system, system and air-conditionings.
Background technology
In order to make air-conditioning system develop to better energy saving, Effec-tive Function direction, in the related technology, high-end air-conditioning phase It there is better energy consumption and operation to show the air-conditioning of bottom end, is realized by the promotion of hardware, but it is high Hold the cost of air-conditioning higher.Also realize that air-conditioning system is more energy saving and Effec-tive Function by the control logic of air-conditioning.
But there are following general character disadvantages:The control logic of air-conditioning system cannot make sky according to the operation characteristic of unit The adjusting system moment is in the state of Effec-tive Function, causes the heat transfer efficiency of heat exchanger that cannot effectively play, and then influences entire The actual motion effect of the unit of air-conditioning system.
Invention content
The present invention is directed at least solve one of the technical problems existing in the prior art.
For this purpose, an object of the present invention is to provide a kind of control method of air-conditioning system, the control of the air-conditioning system Method can reasonably adjust the aperture of electric expansion valve according to refrigerant coefficient, and air-conditioning system is made to be followed always in best refrigerant Circular rector ensures air-conditioning system with more energy-efficient side to improve the heat exchange efficiency and reliability of operation of air-conditioning system Formula is run, and promotes usage experience.
It is another object of the present invention to propose a kind of control system of air-conditioning system.
Another object of the present invention is to propose a kind of air-conditioning.
To achieve the goals above, the embodiment of the first aspect of the present invention discloses a kind of controlling party of air-conditioning system Method includes the following steps:Under heating mode after the compressor operating predetermined time, judge whether the first refrigerant coefficient is located under first It limits between threshold value and the first upper limit threshold;If the first refrigerant coefficient is located on first lower threshold and described first Between limiting threshold value, then the aperture of electronic expansion valve of indoor unit is adjusted according to the line temperature of indoor heat exchanger, in time to change Refrigerant circulation;If the first refrigerant coefficient is more than first upper limit threshold, increase the indoor unit electronic expansion The aperture of valve;If the first refrigerant coefficient is less than first lower threshold, reduce the electronic expansion valve of indoor unit Aperture.
It is swollen can reasonably to adjust electronics according to refrigerant coefficient for the control method of air-conditioning system according to the ... of the embodiment of the present invention The aperture of swollen valve makes air-conditioning system be in best refrigerant circulation always, to improve the heat exchange efficiency and fortune of air-conditioning system Capable reliability ensures that air-conditioning system is run in a manner of more energy-efficient, promotes usage experience.
In some instances, the first refrigerant coefficient is:(the corresponding saturation temperature-of outlet pressure of indoor heat exchanger The line temperature of indoor heat exchanger)/(the corresponding saturation temperature-indoor environment temperature of outlet pressure of indoor heat exchanger);Alternatively, (line temperature of the corresponding saturation temperature-indoor heat exchanger of inlet pressure of indoor heat exchanger)/(entrance pressure of indoor heat exchanger Corresponding saturation temperature-the indoor environment temperature of power);Alternatively, (the corresponding saturation temperature of pressure at expulsion-interior heat exchange of compressor The line temperature of device)/(the corresponding saturation temperature-indoor environment temperature of pressure at expulsion of compressor).
In some instances, if the first refrigerant coefficient be more than first upper limit threshold, increase described in The aperture of electronic expansion valve of indoor unit, including:If the first refrigerant coefficient is more than first upper limit threshold, with predetermined Interval time gradually increase the aperture of the electronic expansion valve of indoor unit;If the first refrigerant coefficient is less than described first Lower threshold is gradually reduced the aperture of the electronic expansion valve of indoor unit with the scheduled interval time.
In some instances, when compressor operating time is less than the predetermined time under the heating mode, according to described The line temperature of indoor heat exchanger adjusts the aperture of electronic expansion valve of indoor unit, in time to change refrigerant circulation.
In some instances, further include:Under refrigeration mode after the compressor operating predetermined time, judge that the second refrigerant coefficient is It is no to be located between the second lower threshold and the second upper limit threshold;If the second refrigerant coefficient is located at second lower threshold And second between upper limit threshold, then according to the aperture of machine electric expansion valve outside the delivery temperature regulation room of compressor, in time Change refrigerant circulation;If the second refrigerant coefficient is more than second upper limit threshold, increase the outdoor unit electronics The aperture of expansion valve;If the second refrigerant coefficient is less than second lower threshold, it is swollen to reduce the outdoor unit electronics The aperture of swollen valve.
In some instances, the second refrigerant coefficient is:(the corresponding saturation temperature-of outlet pressure of outdoor heat exchanger The line temperature of outdoor heat exchanger)/(the corresponding saturation temperature-outdoor environment temperature of outlet pressure of outdoor heat exchanger);Alternatively, (line temperature of the corresponding saturation temperature-outdoor heat exchanger of inlet pressure of outdoor heat exchanger)/(entrance pressure of outdoor heat exchanger Corresponding saturation temperature-the outdoor environment temperature of power);Alternatively, (corresponding saturation temperature-the outdoor heat exchange of pressure at expulsion of compressor The line temperature of device)/(the corresponding saturation temperature-outdoor environment temperature of pressure at expulsion of compressor).
In some instances, if the second refrigerant coefficient is more than second upper limit threshold, increase the outdoor The aperture of machine electric expansion valve, including:If the second refrigerant coefficient is more than second upper limit threshold, with scheduled Gradually increase the aperture of the outdoor unit electric expansion valve every the time;If the second refrigerant coefficient is less than second lower limit Threshold value is gradually reduced the aperture of the outdoor unit electric expansion valve with the scheduled interval time, wherein second upper limit Threshold value is greater than or equal to first upper limit threshold, and second lower threshold is greater than or equal to first lower threshold.
In some instances, further include:When compressor operating time is less than the predetermined time under the refrigeration mode, root According to the aperture of machine electric expansion valve outside the delivery temperature regulation room of compressor, in time to change refrigerant circulation.
The embodiment of the second aspect of the present invention discloses a kind of control system of air-conditioning system, including:Judgment module is used After the compressor operating predetermined time in a heating mode, judge whether the first refrigerant coefficient is located at the first lower threshold and first Between upper limit threshold;Control module, for being located at first lower threshold and described first in the first refrigerant coefficient When between limit threshold value, the aperture of electronic expansion valve of indoor unit is adjusted according to the line temperature of indoor heat exchanger, in time to change Refrigerant circulation, and when the first refrigerant coefficient is more than first upper limit threshold, increase the indoor unit electronic expansion The aperture of valve, and when the first refrigerant coefficient is less than first lower threshold, reduce the indoor unit electronic expansion The aperture of valve.
It is swollen can reasonably to adjust electronics according to refrigerant coefficient for the control system of air-conditioning system according to the ... of the embodiment of the present invention The aperture of swollen valve makes air-conditioning system be in best refrigerant circulation always, to improve the heat exchange efficiency and fortune of air-conditioning system Capable reliability ensures that air-conditioning system is run in a manner of more energy-efficient, promotes usage experience.
In some instances, the first refrigerant coefficient is:(the corresponding saturation temperature-of outlet pressure of indoor heat exchanger The line temperature of indoor heat exchanger)/(the corresponding saturation temperature-indoor environment temperature of outlet pressure of indoor heat exchanger);Alternatively, (line temperature of the corresponding saturation temperature-indoor heat exchanger of inlet pressure of indoor heat exchanger)/(entrance pressure of indoor heat exchanger Corresponding saturation temperature-the indoor environment temperature of power);Alternatively, (the corresponding saturation temperature of pressure at expulsion-interior heat exchange of compressor The line temperature of device)/(the corresponding saturation temperature-indoor environment temperature of pressure at expulsion of compressor).
In some instances, the control module is used for:If the first refrigerant coefficient is more than first upper limit threshold Value, then the time gradually increases the aperture of the electronic expansion valve of indoor unit at predetermined intervals;If the first refrigerant coefficient Less than first lower threshold, the aperture of the electronic expansion valve of indoor unit is gradually reduced with the scheduled interval time.
In some instances, it is predetermined less than described to be additionally operable to compressor operating time in a heating mode for the control module When the time, the aperture of electronic expansion valve of indoor unit is adjusted according to the line temperature of the indoor heat exchanger, it is cold in time to change Matchmaker's internal circulating load.
In some instances, after the judgment module is additionally operable to the compressor operating predetermined time in cooling mode, judge Whether the second refrigerant coefficient is between the second lower threshold and the second upper limit threshold;The control module is additionally operable to described When two refrigerant coefficients are between second lower threshold and the second upper limit threshold, according to the delivery temperature regulation room of compressor The aperture of outer machine electric expansion valve in time to change refrigerant circulation, and is more than described second in the second refrigerant coefficient When upper limit threshold, increase the aperture of the outdoor unit electric expansion valve, and be less than described second in the second refrigerant coefficient When lower threshold, reduce the aperture of the outdoor unit electric expansion valve.
In some instances, the second refrigerant coefficient is:(the corresponding saturation temperature-of outlet pressure of outdoor heat exchanger The line temperature of outdoor heat exchanger)/(the corresponding saturation temperature-outdoor environment temperature of outlet pressure of outdoor heat exchanger);Alternatively, (line temperature of the corresponding saturation temperature-outdoor heat exchanger of inlet pressure of outdoor heat exchanger)/(entrance pressure of outdoor heat exchanger Corresponding saturation temperature-the outdoor environment temperature of power);Alternatively, (corresponding saturation temperature-the outdoor heat exchange of pressure at expulsion of compressor The line temperature of device)/(the corresponding saturation temperature-outdoor environment temperature of pressure at expulsion of compressor).
In some instances, the control module is used for:If the second refrigerant coefficient is more than second upper limit threshold Value, then the time gradually increases the aperture of the outdoor unit electric expansion valve at predetermined intervals;If the second refrigerant coefficient Less than second lower threshold, the aperture of the outdoor unit electric expansion valve is gradually reduced with the scheduled interval time, Wherein, second upper limit threshold is greater than or equal to first upper limit threshold, and second lower threshold is greater than or equal to institute State the first lower threshold.
In some instances, it is predetermined less than described to be additionally operable to compressor operating time in cooling mode for the control module When the time, according to the aperture of machine electric expansion valve outside the delivery temperature regulation room of compressor, in time to change refrigerant circulation.
The embodiment of the third aspect of the present invention discloses a kind of air-conditioning, including:Indoor unit;Outdoor unit, the outdoor unit Including:Compressor and outdoor heat exchanger;And the control system of the air-conditioning system described in the embodiment according to above-mentioned second aspect System.The air-conditioning can reasonably adjust the aperture of electric expansion valve according to refrigerant coefficient, and air-conditioning is made to be in best refrigerant always Internal circulating load ensures that air-conditioning is run in a manner of more energy-efficient to improve the heat exchange efficiency and reliability of operation of air-conditioning, Promote usage experience.
The additional aspect and advantage of the present invention will be set forth in part in the description, and will partly become from the following description Obviously, or practice through the invention is recognized.
Description of the drawings
The above-mentioned and/or additional aspect and advantage combination following accompanying drawings of the present invention in the description of embodiment to that will become Obviously and it is readily appreciated that, wherein:
Fig. 1 is the flow chart of the control method of air-conditioning system according to an embodiment of the invention.
Fig. 2 is the flow chart of the control method of air-conditioning system in accordance with another embodiment of the present invention.
Fig. 3 be air-conditioning system in accordance with another embodiment of the present invention control method according to the pipeline of indoor heat exchanger The control logic figure of the aperture of machine electric expansion valve in temperature conditioning chamber;
Fig. 4 be air-conditioning system in accordance with another embodiment of the present invention control method according to the delivery temperature of compressor The control logic figure of the aperture of the outer machine electric expansion valve of regulation room;
Fig. 5 is the structure diagram of the control system of air-conditioning system in accordance with another embodiment of the present invention.
Reference numeral:
Control system 500, judgment module 510, the control module 520 of air-conditioning system.
Specific implementation mode
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached The embodiment of figure description is exemplary, and is only used for explaining the present invention, and is not considered as limiting the invention.
The control method, system and air-conditioning of air-conditioning system according to the ... of the embodiment of the present invention are described below in conjunction with the accompanying drawings.
Fig. 1 is the flow chart of the control method of air-conditioning system according to an embodiment of the invention.As shown in Figure 1, and tying Fig. 2 is closed, the control method of air-conditioning system according to an embodiment of the invention includes the following steps:
S101:Under heating mode after the compressor operating predetermined time, judge whether the first refrigerant coefficient is located at the first lower limit Between threshold value and the first upper limit threshold.It enables:First lower threshold is denoted as c, and the first upper limit threshold is denoted as d.I.e.:Judge the first refrigerant Whether coefficient n1 is true between c~d.Wherein, the first lower threshold c is less than the first upper limit threshold d.
It should be noted that concrete numerical values of the first lower threshold c less than the first upper limit threshold d can demarcate in advance It arrives.
In specific example, the predetermined time is, for example, 30 minutes, certainly, is merely exemplary within 30 minutes, can also basis It needs to carry out adjustment appropriate.
In the specific example of the present invention, the first refrigerant coefficient n1 is:
(line temperature of the corresponding saturation temperature-indoor heat exchanger of outlet pressure of indoor heat exchanger)/(indoor heat exchanger The corresponding saturation temperature-indoor environment temperature of outlet pressure);Alternatively,
(line temperature of the corresponding saturation temperature-indoor heat exchanger of inlet pressure of indoor heat exchanger)/(indoor heat exchanger The corresponding saturation temperature-indoor environment temperature of inlet pressure);Alternatively,
(line temperature of the corresponding saturation temperature-indoor heat exchanger of pressure at expulsion of compressor)/(exhaust pressure of compressor Corresponding saturation temperature-the indoor environment temperature of power).
With (line temperature of the corresponding saturation temperature-indoor heat exchanger of outlet pressure of indoor heat exchanger)/(indoor heat exchange Corresponding saturation temperature-the indoor environment temperature of outlet pressure of device) for, then the first refrigerant coefficient n1=(Tb2-T2)/(Tb2- Th2), wherein Tb2 is the corresponding saturation temperature of outlet pressure of indoor heat exchanger, and T2 is the line temperature of indoor heat exchanger, Tb For the corresponding saturation temperature of outlet pressure of indoor heat exchanger, Th2 is indoor environment temperature.
Such as:The outlet pressure P2 of indoor heat exchanger is detected by pressure sensor, then going out according to indoor heat exchanger Mouth pressure P2 determines the corresponding saturation temperature Tb2 of the outlet pressure of indoor heat exchanger.The line temperature T2 of indoor heat exchanger with And indoor environment temperature Th2 can detect to obtain by corresponding temperature sensor.
S102:If the first refrigerant coefficient changes between the first lower threshold and the first upper limit threshold according to interior The line temperature of hot device adjusts the aperture of electronic expansion valve of indoor unit, in time to change refrigerant circulation.
That is, if the first refrigerant coefficient n1 between c~d, according to the line temperature T2 of indoor heat exchanger The aperture for adjusting electronic expansion valve of indoor unit, in time to change refrigerant circulation.
As shown in figure 3, the aperture when electronic expansion valve of indoor unit is adjusted according to the line temperature T2 of indoor heat exchanger When ,+the g if T2 > T2 are averaged, the electronic expansion valve of indoor unit aperture of corresponding indoor unit reduces the aperture of predetermined unit amount; If T2 is averaged ,-g < T2 < T2 are averaged+g, and electronic expansion valve of indoor unit aperture remains unchanged;- the g if T2 < T2 are averaged, Electronic expansion valve of indoor unit aperture opens the aperture of big predetermined unit amount, wherein 0≤g≤10.
S103:If the first refrigerant coefficient is more than the first upper limit threshold, increase the aperture of electronic expansion valve of indoor unit.
That is, if n1 > d, increase the aperture of electronic expansion valve of indoor unit.Such as:If the first refrigerant coefficient N1 is more than the first upper limit threshold d, then the time (such as 2 minutes) gradually increases opening for electronic expansion valve of indoor unit at predetermined intervals Degree.
S104:If the first refrigerant coefficient is less than the first lower threshold, reduce the aperture of electronic expansion valve of indoor unit.
That is, if n1 < c, reduce the aperture of electronic expansion valve of indoor unit.If the first refrigerant coefficient n1 is small In the first lower threshold c, the time, (such as 2 minutes) were gradually reduced the aperture of electronic expansion valve of indoor unit at predetermined intervals.
In addition, if the first refrigerant coefficient n1 < c are invalid, then last layer decision logic is returned, further judges first Relationship between refrigerant coefficient n and c and d.
In an embodiment of the present invention, this method further includes:Compressor operating time is less than the predetermined time under heating mode When, the aperture of electronic expansion valve of indoor unit is adjusted according to the line temperature of indoor heat exchanger, in time to change refrigerant circulation.
Namely institute, under heating mode, when compressor operating time was less than such as the case where 30 minutes, at this point, according to room The line temperature T2 of interior heat exchanger adjusts the aperture of electronic expansion valve of indoor unit, in time to change refrigerant circulation.Wherein, root The specific implementation of the aperture of electronic expansion valve of indoor unit is adjusted according to the line temperature T2 of indoor heat exchanger in the examples described above It has been described, is not repeated herein.
It is swollen can reasonably to adjust electronics according to refrigerant coefficient for the control method of air-conditioning system according to the ... of the embodiment of the present invention The aperture of swollen valve makes air-conditioning system be in best refrigerant circulation always, to improve the heat exchange efficiency and fortune of air-conditioning system Capable reliability ensures that air-conditioning system is run in a manner of more energy-efficient, promotes usage experience.
Furthermore, the method for the embodiment of the present invention further includes the controlling party to refrigerant circulation in cooling mode Method, specifically,
Under refrigeration mode after the compressor operating predetermined time, judge whether the second refrigerant coefficient n2 is located at the second lower threshold Between a and the second upper limit threshold b.Second lower threshold a is less than the second upper limit threshold b.Two lower threshold a are less than the second upper limit threshold Value b is demarcated generally according to demand and is obtained in advance.
In specific example, the predetermined time is, for example, 30 minutes, certainly, is merely exemplary within 30 minutes, can also basis It needs to carry out adjustment appropriate.
In the specific example of the present invention, the second refrigerant coefficient n2 is:
(line temperature of the corresponding saturation temperature-outdoor heat exchanger of outlet pressure of outdoor heat exchanger)/(outdoor heat exchanger The corresponding saturation temperature-outdoor environment temperature of outlet pressure);Alternatively,
(line temperature of the corresponding saturation temperature-outdoor heat exchanger of inlet pressure of outdoor heat exchanger)/(outdoor heat exchanger The corresponding saturation temperature-outdoor environment temperature of inlet pressure);Alternatively,
(line temperature of the corresponding saturation temperature-outdoor heat exchanger of pressure at expulsion of compressor)/(exhaust pressure of compressor Corresponding saturation temperature-the outdoor environment temperature of power).
With (line temperature of the corresponding saturation temperature-outdoor heat exchanger of outlet pressure of outdoor heat exchanger)/(outdoor heat exchange Corresponding saturation temperature-the outdoor environment temperature of outlet pressure of device) for, then refrigerant coefficient n=(Tb-Tc)/(Tb-Th1), In, Tb is the corresponding saturation temperature of outlet pressure of outdoor heat exchanger, and Tc is the export pipeline temperature of outdoor heat exchanger, and Tb is room The corresponding saturation temperature of outlet pressure of external heat exchanger, Th1 is outdoor environment temperature.
Such as:The outlet pressure P1 of outdoor heat exchanger is detected by pressure sensor, then going out according to outdoor heat exchanger Mouth pressure P1 determines the corresponding saturation temperature Tb of the outlet pressure of outdoor heat exchanger.The line temperature Tc of outdoor heat exchanger and Outdoor environment temperature Th1 can detect to obtain by corresponding temperature sensor.
If the second refrigerant coefficient is between the second lower threshold and the second upper limit threshold, according to the exhaust of compressor The aperture of machine electric expansion valve outside temperature conditioning chamber, in time to change refrigerant circulation.
That is, under refrigeration mode compressor operating time reach 30 minutes, the second refrigerant coefficient n2 be located at second under When limiting between threshold value and the second upper limit threshold, the aperture of electric expansion valve is adjusted according to the delivery temperature of compressor, in time Change refrigerant circulation.
As shown in figure 4, adjusting the aperture of electric expansion valve according to the delivery temperature of compressor, followed in time changing refrigerant Circular rector, including:When the aperture of outdoor unit electric expansion valve is adjusted with the delivery temperature of compressor, the delivery temperature point of compressor For ascent stage and descending branch, when delivery temperature is in uphill process from low to high, then the aperture of outdoor unit electric expansion valve It opens step by step greatly, for example, when delivery temperature is increased to T3 by T1, the aperture of outdoor unit electric expansion valve changes to B by A.Work as exhaust When temperature is in decline process from high to low, the aperture of outdoor unit electric expansion valve turns down step by step.For example, delivery temperature is by T6 When being reduced to T4, the aperture of outdoor unit electric expansion valve is reduced to B by C.Wherein, A < B < C < D < E, T1 < T3 < T5 < T7, T2 < T4 < T6 < T8.
If the second refrigerant coefficient n2 is more than the second upper limit threshold, increase the aperture of outdoor unit electric expansion valve.
That is, compressor operating time reaches 30 minutes under refrigeration mode, and the second refrigerant coefficient n2 is more than the When two upper limit thresholds, increase the aperture of outdoor unit electric expansion valve.
Specifically, if the second refrigerant coefficient n2 is more than the first upper limit threshold b, at predetermined intervals (such as 2 points of time Clock) gradually increase outdoor unit electric expansion valve aperture;
If the second refrigerant coefficient n2 is less than the first lower threshold a, the time, (such as 2 minutes) were gradually reduced at predetermined intervals The aperture of outdoor unit electric expansion valve;
Wherein, the second upper limit threshold b is greater than or equal to the first upper limit threshold d, the second lower threshold a and is greater than or equal to first Lower threshold c.
Such as:The second refrigerant coefficient n2 is judged whether between a~b, if it is, outdoor unit electric expansion valve is opened Degree carries out aperture regulation with the delivery temperature Tp of compressor.Wherein, the aperture of outdoor unit electric expansion valve is with the exhaust of compressor Temperature Tp carries out aperture regulation and refers to above-mentioned example.
If the second refrigerant coefficient n2 is not between a~b, further judge whether n2 > b are true, if at Vertical, then outdoor unit electric expansion valve opens the aperture of big predetermined unit amount, and adjusts within every 2 minutes primary.
If the second refrigerant coefficient n2 < a are set up, outdoor unit electric expansion valve turns down the aperture of predetermined unit amount, and every It adjusts within 2 minutes primary.
In addition, if the second refrigerant coefficient n2 < a are invalid, then last layer decision logic is returned.
As shown in figure 4, in one embodiment of the invention, control method further includes:Compressor operating under refrigeration mode When time is less than the predetermined time, according to the aperture of machine electric expansion valve outside the delivery temperature regulation room of compressor, in due course Ground changes refrigerant circulation.
Namely institute, if compressor operating time was less than 30 minutes under refrigeration mode, according to the exhaust temperature of compressor The aperture for spending the outer machine electric expansion valve of regulation room, in time to change refrigerant circulation.Wherein, outdoor unit electric expansion valve is opened Degree carries out aperture regulation with the delivery temperature Tp of compressor and refers to above-mentioned example.
It is swollen can reasonably to adjust electronics according to refrigerant coefficient for the control method of air-conditioning system according to the ... of the embodiment of the present invention The aperture of swollen valve makes air-conditioning system be in best refrigerant circulation always, to improve the heat exchange efficiency and fortune of air-conditioning system Capable reliability ensures that air-conditioning system is run in a manner of more energy-efficient, promotes usage experience.
Fig. 5 is the structure diagram of the control system of air-conditioning system according to an embodiment of the invention.As shown in figure 5, root According to the control system 500 of the air-conditioning system of one embodiment of the invention, including:Judgment module 510 and control module 520.
Wherein, after judgment module 510 is for the compressor operating predetermined time in a heating mode, judge the first refrigerant coefficient Whether between the first lower threshold and the first upper limit threshold.Control module 520 in the first refrigerant coefficient for being located at When between first lower threshold and first upper limit threshold, according to electromechanical in the line temperature regulation room of indoor heat exchanger The aperture of sub- expansion valve in time to change refrigerant circulation, and is more than first upper limit threshold in the first refrigerant coefficient When value, increase the aperture of the electronic expansion valve of indoor unit, and be less than the first lower limit threshold in the first refrigerant coefficient When value, reduce the aperture of the electronic expansion valve of indoor unit.
In one embodiment of the invention, the first refrigerant coefficient is:(outlet pressure of indoor heat exchanger is corresponding The line temperature of saturation temperature-indoor heat exchanger)/(the corresponding saturation temperature of outlet pressure-indoor environment temperature of indoor heat exchanger Degree);Alternatively, (line temperature of the corresponding saturation temperature-indoor heat exchanger of inlet pressure of indoor heat exchanger)/(indoor heat exchange Corresponding saturation temperature-the indoor environment temperature of inlet pressure of device);Alternatively, (the corresponding saturation temperature of pressure at expulsion of compressor The line temperature of degree-indoor heat exchanger)/(the corresponding saturation temperature-indoor environment temperature of pressure at expulsion of compressor).
In one embodiment of the invention, the control module 520 is used for:If the first refrigerant coefficient is more than institute The first upper limit threshold is stated, then the time gradually increases the aperture of the electronic expansion valve of indoor unit at predetermined intervals;If described First refrigerant coefficient is less than first lower threshold, and it is swollen to be gradually reduced the indoor unit electronics with the scheduled interval time The aperture of swollen valve.
In one embodiment of the invention, when the control module 520 is additionally operable to compressor operating in a heating mode Between be less than the predetermined time when, according to the line temperature of the indoor heat exchanger adjust electronic expansion valve of indoor unit aperture, In time to change refrigerant circulation.
In one embodiment of the invention, it is pre- to be additionally operable to compressor operating in cooling mode for the judgment module 510 After fixing time, judge the second refrigerant coefficient whether between the second lower threshold and the second upper limit threshold;The control module 520 are additionally operable to when the second refrigerant coefficient is between second lower threshold and the second upper limit threshold, according to compression The aperture of the outer machine electric expansion valve of the delivery temperature regulation room of machine, in time to change refrigerant circulation, and it is cold described second When matchmaker's coefficient is more than second upper limit threshold, increase the aperture of the outdoor unit electric expansion valve, and cold described second When matchmaker's coefficient is less than second lower threshold, reduce the aperture of the outdoor unit electric expansion valve.
In one embodiment of the invention, the second refrigerant coefficient is:(outlet pressure of outdoor heat exchanger is corresponding The line temperature of saturation temperature-outdoor heat exchanger)/(the corresponding saturation temperature of outlet pressure-outdoor environment temperature of outdoor heat exchanger Degree);Alternatively, (line temperature of the corresponding saturation temperature-outdoor heat exchanger of inlet pressure of outdoor heat exchanger)/(outdoor heat exchange Corresponding saturation temperature-the outdoor environment temperature of inlet pressure of device);Alternatively, (the corresponding saturation temperature of pressure at expulsion of compressor The line temperature of degree-outdoor heat exchanger)/(the corresponding saturation temperature-outdoor environment temperature of pressure at expulsion of compressor).
In one embodiment of the invention, the control module 520 is used for:If the second refrigerant coefficient is more than institute The second upper limit threshold is stated, then the time gradually increases the aperture of the outdoor unit electric expansion valve at predetermined intervals;If described Second refrigerant coefficient is less than second lower threshold, and it is swollen to be gradually reduced the outdoor unit electronics with the scheduled interval time The aperture of swollen valve, wherein second upper limit threshold is greater than or equal to first upper limit threshold, and second lower threshold is big In or equal to first lower threshold.
In one embodiment of the invention, when the control module 520 is additionally operable to compressor operating in cooling mode Between be less than the predetermined time when, according to the aperture of machine electric expansion valve outside the delivery temperature regulation room of compressor, in time Change refrigerant circulation.
It is swollen can reasonably to adjust electronics according to refrigerant coefficient for the control system of air-conditioning system according to the ... of the embodiment of the present invention The aperture of swollen valve makes air-conditioning system be in best refrigerant circulation always, to improve the heat exchange efficiency and fortune of air-conditioning system Capable reliability ensures that air-conditioning system is run in a manner of more energy-efficient, promotes usage experience.
It should be noted that the specific implementation of the control system of the air-conditioning system of the embodiment of the present invention is in of the invention real The specific implementation for applying the control method of the air-conditioning system of example is similar, specifically refers to the description of method part, in order to reduce Redundancy is not repeated herein.
Further, embodiment of the invention discloses that a kind of air-conditioning, including:Indoor unit;Outdoor unit, the outdoor unit packet It includes:Compressor and outdoor heat exchanger;And the control system of the air-conditioning system according to the above embodiments.The air-conditioning can be with The aperture that electric expansion valve is reasonably adjusted according to refrigerant coefficient makes air-conditioning be in best refrigerant circulation always, to carry The heat exchange efficiency and reliability of operation of high air-conditioning ensure that air-conditioning is run in a manner of more energy-efficient, promote usage experience.
In addition, other compositions of air-conditioning according to the ... of the embodiment of the present invention and effect are for those of ordinary skill in the art For be all known, in order to reduce redundancy, be not repeated herein.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not Centainly refer to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be any One or more embodiments or example in can be combined in any suitable manner.
Although an embodiment of the present invention has been shown and described, it will be understood by those skilled in the art that:Not In the case of being detached from the principle of the present invention and objective a variety of change, modification, replacement and modification can be carried out to these embodiments, this The range of invention is limited by claim and its equivalent.

Claims (17)

1. a kind of control method of air-conditioning system, which is characterized in that include the following steps:
Under heating mode after the compressor operating predetermined time, judge whether the first refrigerant coefficient is located at the first lower threshold and first Between upper limit threshold;
If the first refrigerant coefficient is between first lower threshold and first upper limit threshold, according to interior The line temperature of heat exchanger adjusts the aperture of electronic expansion valve of indoor unit, in time to change refrigerant circulation;
If the first refrigerant coefficient is more than first upper limit threshold, increase opening for the electronic expansion valve of indoor unit Degree;
If the first refrigerant coefficient is less than first lower threshold, reduce opening for the electronic expansion valve of indoor unit Degree.
2. the control method of air-conditioning system according to claim 1, which is characterized in that the first refrigerant coefficient is:
(line temperature of the corresponding saturation temperature-indoor heat exchanger of outlet pressure of indoor heat exchanger)/(indoor heat exchanger goes out Corresponding saturation temperature-the indoor environment temperature of mouth pressure);Alternatively,
(line temperature of the corresponding saturation temperature-indoor heat exchanger of inlet pressure of indoor heat exchanger)/(indoor heat exchanger enters Corresponding saturation temperature-the indoor environment temperature of mouth pressure);Alternatively,
(line temperature of the corresponding saturation temperature-indoor heat exchanger of pressure at expulsion of compressor)/(pressure at expulsion pair of compressor Saturation temperature-the indoor environment temperature answered).
3. the control method of air-conditioning system according to claim 1, which is characterized in that if the first refrigerant system Number is more than first upper limit threshold, then increases the aperture of the electronic expansion valve of indoor unit, including:
If the first refrigerant coefficient be more than first upper limit threshold, at predetermined intervals the time gradually increase the room The aperture of interior machine electric expansion valve;
If the first refrigerant coefficient is less than first lower threshold, it is gradually reduced with the scheduled interval time described The aperture of electronic expansion valve of indoor unit.
4. the control method of air-conditioning system according to claim 1, which is characterized in that compressor is transported under the heating mode When the row time is less than the predetermined time, opening for electronic expansion valve of indoor unit is adjusted according to the line temperature of the indoor heat exchanger Degree, in time to change refrigerant circulation.
5. the control method of air-conditioning system according to claim 1, which is characterized in that further include:
Under refrigeration mode after the compressor operating predetermined time, judge whether the second refrigerant coefficient is located at the second lower threshold and second Between upper limit threshold;
If the second refrigerant coefficient is between second lower threshold and the second upper limit threshold, according to compressor The aperture of the outer machine electric expansion valve of delivery temperature regulation room, in time to change refrigerant circulation;
If the second refrigerant coefficient is more than second upper limit threshold, increase opening for the outdoor unit electric expansion valve Degree;
If the second refrigerant coefficient is less than second lower threshold, reduce opening for the outdoor unit electric expansion valve Degree.
6. the control method of air-conditioning system according to claim 5, which is characterized in that the second refrigerant coefficient is:
(line temperature of the corresponding saturation temperature-outdoor heat exchanger of outlet pressure of outdoor heat exchanger)/(outdoor heat exchanger goes out Corresponding saturation temperature-the outdoor environment temperature of mouth pressure);Alternatively,
(line temperature of the corresponding saturation temperature-outdoor heat exchanger of inlet pressure of outdoor heat exchanger)/(outdoor heat exchanger enters Corresponding saturation temperature-the outdoor environment temperature of mouth pressure);Alternatively,
(line temperature of the corresponding saturation temperature-outdoor heat exchanger of pressure at expulsion of compressor)/(pressure at expulsion pair of compressor Saturation temperature-the outdoor environment temperature answered).
7. the control method of air-conditioning system according to claim 5, which is characterized in that if the second refrigerant coefficient is big In second upper limit threshold, then increase the aperture of the outdoor unit electric expansion valve, including:
If the second refrigerant coefficient be more than second upper limit threshold, at predetermined intervals the time gradually increase the room The aperture of outer machine electric expansion valve;
If the second refrigerant coefficient is less than second lower threshold, it is gradually reduced with the scheduled interval time described The aperture of outdoor unit electric expansion valve,
Wherein, second upper limit threshold is greater than or equal to first upper limit threshold, and second lower threshold is more than or waits In first lower threshold.
8. the control method of air-conditioning system according to claim 5, which is characterized in that further include:
When compressor operating time is less than the predetermined time under the refrigeration mode, according to the delivery temperature regulation room of compressor The aperture of outer machine electric expansion valve, in time to change refrigerant circulation.
9. a kind of control system of air-conditioning system, which is characterized in that including:
Judgment module, for after compressor operating predetermined time in a heating mode, judging the first refrigerant coefficient whether positioned at the Between one lower threshold and the first upper limit threshold;
Control module is used in the first refrigerant coefficient between first lower threshold and first upper limit threshold When, the aperture of electronic expansion valve of indoor unit is adjusted according to the line temperature of indoor heat exchanger, in time to change refrigerant circulation, And when the first refrigerant coefficient is more than first upper limit threshold, increase the aperture of the electronic expansion valve of indoor unit, with And when the first refrigerant coefficient is less than first lower threshold, reduce the aperture of the electronic expansion valve of indoor unit.
10. the control system of air-conditioning system according to claim 9, which is characterized in that the first refrigerant coefficient is:
(line temperature of the corresponding saturation temperature-indoor heat exchanger of outlet pressure of indoor heat exchanger)/(indoor heat exchanger goes out Corresponding saturation temperature-the indoor environment temperature of mouth pressure);Alternatively,
(line temperature of the corresponding saturation temperature-indoor heat exchanger of inlet pressure of indoor heat exchanger)/(indoor heat exchanger enters Corresponding saturation temperature-the indoor environment temperature of mouth pressure);Alternatively,
(line temperature of the corresponding saturation temperature-indoor heat exchanger of pressure at expulsion of compressor)/(pressure at expulsion pair of compressor Saturation temperature-the indoor environment temperature answered).
11. the control system of air-conditioning system according to claim 9, which is characterized in that the control module is used for:
If the first refrigerant coefficient be more than first upper limit threshold, at predetermined intervals the time gradually increase the room The aperture of interior machine electric expansion valve;
If the first refrigerant coefficient is less than first lower threshold, it is gradually reduced with the scheduled interval time described The aperture of electronic expansion valve of indoor unit.
12. the control system of air-conditioning system according to claim 9, which is characterized in that the control module is additionally operable to When compressor operating time is less than the predetermined time under heating mode, according to the line temperature regulation room of the indoor heat exchanger The aperture of interior machine electric expansion valve, in time to change refrigerant circulation.
13. the control system of air-conditioning system according to claim 9, which is characterized in that the judgment module is additionally operable to Under refrigeration mode after the compressor operating predetermined time, judge whether the second refrigerant coefficient is located at the second lower threshold and second upper limit Between threshold value;
The control module be additionally operable to the second refrigerant coefficient be located at second lower threshold and the second upper limit threshold it Between when, according to the aperture of machine electric expansion valve outside the delivery temperature regulation room of compressor, in time to change refrigerant circulation, and When the second refrigerant coefficient is more than second upper limit threshold, increase the aperture of the outdoor unit electric expansion valve, and When the second refrigerant coefficient is less than second lower threshold, reduce the aperture of the outdoor unit electric expansion valve.
14. the control system of air-conditioning system according to claim 13, which is characterized in that the second refrigerant coefficient is:
(line temperature of the corresponding saturation temperature-outdoor heat exchanger of outlet pressure of outdoor heat exchanger)/(outdoor heat exchanger goes out Corresponding saturation temperature-the outdoor environment temperature of mouth pressure);Alternatively,
(line temperature of the corresponding saturation temperature-outdoor heat exchanger of inlet pressure of outdoor heat exchanger)/(outdoor heat exchanger enters Corresponding saturation temperature-the outdoor environment temperature of mouth pressure);Alternatively,
(line temperature of the corresponding saturation temperature-outdoor heat exchanger of pressure at expulsion of compressor)/(pressure at expulsion pair of compressor Saturation temperature-the outdoor environment temperature answered).
15. the control system of air-conditioning system according to claim 13, which is characterized in that the control module is used for:
If the second refrigerant coefficient be more than second upper limit threshold, at predetermined intervals the time gradually increase the room The aperture of outer machine electric expansion valve;
If the second refrigerant coefficient is less than second lower threshold, it is gradually reduced with the scheduled interval time described The aperture of outdoor unit electric expansion valve,
Wherein, second upper limit threshold is greater than or equal to first upper limit threshold, and second lower threshold is more than or waits In first lower threshold.
16. the control system of air-conditioning system according to claim 13, which is characterized in that the control module is additionally operable to When compressor operating time is less than the predetermined time under refrigeration mode, according to electromechanical son outside the delivery temperature regulation room of compressor The aperture of expansion valve, in time to change refrigerant circulation.
17. a kind of air-conditioning, which is characterized in that including:
Indoor unit;
Outdoor unit, the outdoor unit include:Compressor and outdoor heat exchanger;And
According to the control system of claim 9-16 any one of them air-conditioning systems.
CN201810600438.1A 2018-06-12 2018-06-12 Control method, system and the air-conditioning of air-conditioning system Pending CN108759007A (en)

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