CN105864984A - Adjusting method and device for indoor unit electronic expansion valve - Google Patents

Adjusting method and device for indoor unit electronic expansion valve Download PDF

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Publication number
CN105864984A
CN105864984A CN201610272101.3A CN201610272101A CN105864984A CN 105864984 A CN105864984 A CN 105864984A CN 201610272101 A CN201610272101 A CN 201610272101A CN 105864984 A CN105864984 A CN 105864984A
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China
Prior art keywords
degree
indoor
preset
superheat
value
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CN201610272101.3A
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CN105864984B (en
Inventor
王穗
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Midea Group Co Ltd
Guangdong Midea HVAC Equipment Co Ltd
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Midea Group Co Ltd
Guangdong Midea HVAC Equipment Co Ltd
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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00Control inputs relating to air properties
    • F24F2110/10Temperature
    • 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
    • F24F11/30Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • 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
    • 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
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24FAIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00Control inputs relating to air properties
    • 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
    • F24F11/70Control 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
    • F24F2140/00Control inputs relating to system states
    • F24F2140/10Pressure
    • F24F2140/12Heat-exchange fluid pressure

Abstract

The invention discloses an adjusting method for an indoor unit electronic expansion valve. The adjusting method for the indoor unit electronic expansion valve comprises the following steps that the pressure value, detected by a preset pressure sensor, in a first refrigerant pipe end in an indoor unit is obtained; the first refrigerant pipe end is a refrigerant outlet end of the indoor unit when an air conditioner runs in a refrigerating manner; the saturation temperature value corresponding to a refrigerant is calculated according to the pressure value; the degree of superheat or the degree of supercooling of the indoor unit is calculated according to the saturation temperature value and the refrigerant temperature obtained when the refrigerant in the indoor unit flows out; and the opening degree of the indoor unit electronic expansion valve is adjusted according to the degree of superheat or the degree of supercooling obtained through calculation and a preset target degree of superheat or a preset target degree of supercooling. The invention further discloses an adjusting device for the indoor unit electronic expansion valve. The calculation precision of the degree of superheat and the degree of overcooling is improved.

Description

Electronic expansion valve of indoor unit control method and device
Technical field
The present invention relates to air-conditioning technical field, particularly relate to electronic expansion valve of indoor unit control method and device.
Background technology
Along with maturation and the raising of customer acceptance degree of air-conditioning technical, connected machine system is at air-conditioning market Occupy the most vast share.As the big ingredient of system one, indoor set has not only acted as output The effect of terminal, also take part in Flow-rate adjustment and degree of superheat regulation, plays in system stability control Key player.
When indoor set runs refrigeration mode, interior machine heat exchanger does vaporizer use, the electronic expansion of indoor set Valve should ensure suitable evaporating pressure and flow, also to ensure to export the coolant degree of superheat, prevent compressor Return liquid.When indoor set runs heating mode, interior machine heat exchanger does condenser use, and the electronics of indoor set is swollen Swollen valve acts primarily as regulation flow effect.
Prior art typically by temperature sensor, pickup coil temperature, determines that interior machine heat exchanger exports Coolant state.As it is shown in figure 1, conventional temperature spot includes: indoor environment temperature T1, indoor heat exchanger Temperature T2 and indoor heat exchanger outlet temperature T2B in inlet temperature T2A (refrigeration), indoor heat exchanger pipe (refrigeration).During refrigeration, take degree of superheat SH=T2B-min (T2A, T2), when SH be a certain setting value or It is in and a certain sets interval, then it is assumed that be rational by the cold medium flux of indoor set.When heating, coil pipe Temperature spot state is contrary with during refrigeration, i.e. T2B is recuperator inlet temperature, and T2A is outlet temperature, T2 Remain as temperature in pipe.Take degree of supercooling SC=min (T2B, T2)-T2A, when SC is a certain setting value or place Interval is set, then it is assumed that be rational by the cold medium flux of indoor set in a certain.Calculate the degree of superheat and During degree of supercooling, all use the temperature value of temperature sensor detection as calculating parameter;But, due to temperature Sensor error is relatively big, therefore uses two to carry out calculating and easily form double error so that the degree of superheat and The precision that degree of supercooling calculates is poor.
Summary of the invention
A kind of electronic expansion valve of indoor unit control method of offer and device, purport are provided Improve the degree of superheat and the precision of degree of supercooling calculating.
For achieving the above object, a kind of electronic expansion valve of indoor unit control method that the present invention provides, described Electronic expansion valve of indoor unit control method comprises the following steps:
Obtain the force value in the first coolant pipe end in the indoor set that preset pressure sensor is detected;Described The refrigerant exit end of described indoor set when first coolant pipe end is air conditioner refrigerating operation;
The saturation temperature value that coolant is corresponding is calculated according to described force value;
Refrigerant temperature when flowing out according to coolant in described saturation temperature value and indoor set calculates indoor set The degree of superheat or degree of supercooling;
Adjust with the target superheat degree preset or target degree of supercooling according to the calculated degree of superheat or degree of supercooling The aperture of electronic expansion valve of indoor unit.
Preferably, described according in described saturation temperature value and indoor set coolant flow out time refrigerant temperature The degree of superheat or the degree of supercooling that calculate indoor set include:
When described air conditioner refrigerating runs, obtain temperature T2B of described first coolant pipe end, and calculate institute State temperature T2B and obtain, with the difference of described saturation temperature value, the degree of superheat that described indoor set is corresponding;
When described air-conditioning heating runs, obtain temperature T2A of described second coolant pipe end, and calculate institute State saturation temperature value and obtain, with the difference of described temperature T2A, the degree of superheat that described indoor set is corresponding.
Preferably, described electronic expansion valve of indoor unit control method also includes:
When described air conditioner refrigerating runs, when described saturation temperature value is preset less than or equal to first When the difference of value and indoor environment temperature and described saturation temperature value is more than or equal to the second preset value, will The first preset degree of superheat is set as described target superheat degree;When described saturation temperature value is first pre-more than described If the difference of value or indoor environment temperature and described saturation temperature value is less than described second preset value, The second preset degree of superheat is set as described target superheat degree;The described first preset degree of superheat is more than described the The two preset degrees of superheat.
Preferably, described electronic expansion valve of indoor unit control method also includes:
When described air-conditioning heating runs, when the hydrops coefficient of indoor set is pre-less than or equal to the 3rd If during value, the first preset degree of supercooling being set to described target degree of supercooling;When the hydrops coefficient of indoor set is big When three preset values, the second preset degree of supercooling is set to described target degree of supercooling;Described first preset Degree of supercooling is more than described second preset degree of supercooling.
Preferably, described electronic expansion valve of indoor unit control method also includes:
The difference of temperature T2A calculating described saturation temperature value and indoor set the second coolant pipe end obtains first Difference, and the difference calculating described saturation temperature value and indoor environment temperature obtains the second difference;
Calculate described first difference and be worth to described hydrops coefficient with the ratio of the second difference.
Additionally, for achieving the above object, the present invention also provides for a kind of electronic expansion valve of indoor unit adjusting means, Described electronic expansion valve of indoor unit adjusting means includes:
Acquisition module, for obtaining in the indoor set that preset pressure sensor is detected in the first coolant pipe end Force value;The refrigerant exit end of described indoor set when described first coolant pipe end is air conditioner refrigerating operation;
First computing module, for calculating, according to described force value, the saturation temperature value that coolant is corresponding;
Second computing module, for according in described saturation temperature value and indoor set coolant flow out time cold The degree of superheat of matchmaker's temperature computation indoor set or degree of supercooling;
Adjustment module, for according to the calculated degree of superheat or degree of supercooling and the target superheat degree preset or Target degree of supercooling adjusts the aperture of electronic expansion valve of indoor unit.
Preferably, described second computing module is specifically used for, and when described air conditioner refrigerating runs, obtains Temperature T2B of described first coolant pipe end, and calculate the difference of described temperature T2B and described saturation temperature value It is worth to the degree of superheat that described indoor set is corresponding;When described air-conditioning heating runs, obtain described second cold Temperature T2A of matchmaker's pipe end, and the difference calculating described saturation temperature value and described temperature T2A obtains described The degree of superheat that indoor set is corresponding.
Preferably, described electronic expansion valve of indoor unit adjusting means also includes:
First setting module, for when described air conditioner refrigerating runs, when described saturation temperature value Less than or equal to the first preset value and indoor environment temperature and described saturation temperature value difference more than or etc. When the second preset value, the first preset degree of superheat is set as described target superheat degree;When described saturated temperature Angle value is less than more than the difference of described first preset value or indoor environment temperature with described saturation temperature value During described second preset value, the second preset degree of superheat is set as described target superheat degree;Described first pre- Put the degree of superheat more than the described second preset degree of superheat.
Preferably, described electronic expansion valve of indoor unit adjusting means also includes:
Second setting module, for when described air-conditioning heating runs, when the hydrops system of indoor set When number is less than or equal to three preset values, the first preset degree of supercooling is set to described target degree of supercooling;When When the hydrops coefficient of indoor set is more than three preset values, the second preset degree of supercooling is set to described target mistake Cold degree;Described first preset degree of supercooling is more than described second preset degree of supercooling.
Preferably, described electronic expansion valve of indoor unit adjusting means also includes:
3rd computing module, for calculating the temperature of described saturation temperature value and indoor set the second coolant pipe end The difference of T2A obtains the first difference, and the difference calculating described saturation temperature value and indoor environment temperature obtains To the second difference;Calculate described first difference and be worth to described hydrops coefficient with the ratio of the second difference.
The embodiment of the present invention is by obtaining the first coolant pipe end in the indoor set that preset pressure sensor is detected Interior force value;The saturation temperature value that coolant is corresponding is calculated according to described force value;According to described saturated temperature Refrigerant temperature when coolant flows out in angle value and indoor set calculates the degree of superheat or the degree of supercooling of indoor set; Indoor are adjusted with the target superheat degree preset or target degree of supercooling according to the calculated degree of superheat or degree of supercooling The aperture of organic electronic expansion valve.Due to by arrange pressure transducer detection calculation of pressure saturation temperature value, Temperature value according to saturation temperature value and refrigerant exit calculates the degree of superheat or degree of supercooling, relative to existing skill The value that art detects only with a temperature sensor calculates, and therefore improves the degree of superheat and degree of supercooling The precision calculated.
Accompanying drawing explanation
Fig. 1 is the simplification structural representation of indoor set in prior art;
Fig. 2 is indoor machine temperature sensor in electronic expansion valve of indoor unit control method one embodiment of the present invention And pressure transducer distributed architecture schematic diagram;
Fig. 3 is the structural representation of electronic expansion valve of indoor unit control method first embodiment of the present invention;
Fig. 4 is the structural representation of electronic expansion valve of indoor unit control method the second embodiment of the present invention;
Fig. 5 is the structural representation of electronic expansion valve of indoor unit control method the 3rd embodiment of the present invention;
Fig. 6 is the high-level schematic functional block diagram of electronic expansion valve of indoor unit adjusting means first embodiment of the present invention;
Fig. 7 is the high-level schematic functional block diagram of electronic expansion valve of indoor unit adjusting means the second embodiment of the present invention;
Fig. 8 is the high-level schematic functional block diagram of electronic expansion valve of indoor unit adjusting means the 3rd embodiment of the present invention.
The realization of the object of the invention, functional characteristics and advantage will in conjunction with the embodiments, do referring to the drawings further Explanation.
Detailed description of the invention
Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not used to limit Determine the present invention.
The present invention provides a kind of electronic expansion valve of indoor unit control method, with reference to Fig. 3, in one embodiment, This electronic expansion valve of indoor unit control method includes:
Step S10, obtains the pressure in the first coolant pipe end in the indoor set that preset pressure sensor is detected Value;The refrigerant exit end of described indoor set when described first coolant pipe end is air conditioner refrigerating operation;
The electronic expansion valve of indoor unit control method that the embodiment of the present invention provides is mainly used in multi-gang air-conditioner In system, this multi-online air-conditioning system includes multiple indoor set, and each indoor set includes the first coolant Pipe end and the second coolant pipe end, the first coolant pipe end of each first indoor set all by an arm with same always Pipe connects.In the present embodiment, generally, can from a tube voltage drop for house steward's difference to each indoor set To ignore, therefore pressure transducer can be set on arm and detect the pressure in the first coolant pipe end Value (can arrange pressure transducer on an arm, and be all indoor sets by the design of pressure of detection The force value of the first coolant pipe end, it is also possible to be respectively provided with a pressure transducer to obtain more at each arm Force value accurately), it is also possible to pressure transducer inspection (as shown in C point in Fig. 2) is set on house steward and surveys Obtain the force value in the first coolant pipe end of each indoor set.
In the present embodiment, when above-mentioned first coolant pipe end is air conditioner refrigerating operation, the coolant of described indoor set goes out Mouth end, the refrigerant inlet end of indoor set when also running for air-conditioning heating.The most above-mentioned pressure transducer both may be used During detection refrigeration, the evaporating pressure of indoor set, can detect again the condensing pressure of indoor machine during heating.
Step S20, calculates, according to described force value, the saturation temperature value that coolant is corresponding;
Under different force value, corresponding saturation temperature is inconsistent, and all corresponding existence of each force value One saturation temperature value, can obtain correspondence according to the size of force value by the way of tabling look-up or calculating Saturation temperature value.Owing to the first coolant pipe end of each indoor set is interconnected by house steward, the most each indoor The saturation temperature value of machine is the most consistent.
Step S30, refrigerant temperature when flowing out according to coolant in described saturation temperature value and indoor set calculates The degree of superheat of indoor set or degree of supercooling;
In the case of obtaining saturation temperature value, the degree of superheat of indoor set can be calculated according to saturation temperature value Or degree of supercooling.It is understood that when refrigeration, calculating is the degree of superheat;When heating, calculate Be refrigeration degree.When calculating degree of supercooling and the degree of superheat, in addition it is also necessary to combine coolant and change in indoor set The refrigerant temperature of corresponding outlet after heat.Specifically, when described air conditioner refrigerating runs, described first is obtained Temperature T2B of coolant pipe end, and the difference calculating described temperature T2B and described saturation temperature value obtains institute State the degree of superheat that indoor set is corresponding;When described air-conditioning heating runs, obtain described second coolant pipe end Temperature T2A, and the difference calculating described saturation temperature value and described temperature T2A obtains described indoor set pair The degree of superheat answered.
Step S40, according to the calculated degree of superheat or degree of supercooling and the target superheat degree preset or target mistake Cold degree adjusts the aperture of electronic expansion valve of indoor unit.
Common, each indoor set is provided with target superheat degree and target degree of supercooling, for according to current The degree of superheat and degree of supercooling compare with target superheat degree and target degree of supercooling, swollen to adjust indoor set electronics The aperture of swollen valve.This target superheat degree and target degree of supercooling can be specifically to be worth, it is also possible to be one Specific scope, does not do at this and limits further.
The embodiment of the present invention is by obtaining the first coolant pipe end in the indoor set that preset pressure sensor is detected Interior force value;The saturation temperature value that coolant is corresponding is calculated according to described force value;According to described saturated temperature Refrigerant temperature when coolant flows out in angle value and indoor set calculates the degree of superheat or the degree of supercooling of indoor set; Indoor are adjusted with the target superheat degree preset or target degree of supercooling according to the calculated degree of superheat or degree of supercooling The aperture of organic electronic expansion valve.Due to by arrange pressure transducer detection calculation of pressure saturation temperature value, Temperature value according to saturation temperature value and refrigerant exit calculates the degree of superheat or degree of supercooling, relative to existing skill The value that art detects only with a temperature sensor calculates, and therefore improves the degree of superheat and degree of supercooling The precision calculated.
Further, with reference to Fig. 4, based on electronic expansion valve of indoor unit control method first embodiment of the present invention, In electronic expansion valve of indoor unit control method the second embodiment of the present invention, this electronic expansion valve of indoor unit is adjusted Joint method includes:
Step S50, when described air conditioner refrigerating runs, when described saturation temperature value is less than or equal to First preset value and indoor environment temperature are default more than or equal to second with the difference of described saturation temperature value During value, the first preset degree of superheat is set as described target superheat degree;When described saturation temperature value is more than institute State the first preset value or indoor environment temperature and the difference of described saturation temperature value second pre-less than described If during value, the second preset degree of superheat being set as described target superheat degree;The described first preset degree of superheat is big In the described second preset degree of superheat;
Step S10, obtains the pressure in the first coolant pipe end in the indoor set that preset pressure sensor is detected Value;The refrigerant exit end of described indoor set when described first coolant pipe end is air conditioner refrigerating operation;
Step S20, calculates, according to described force value, the saturation temperature value that coolant is corresponding;
Step S30, refrigerant temperature when flowing out according to coolant in described saturation temperature value and indoor set calculates The degree of superheat of indoor set or degree of supercooling;
Step S40, according to the calculated degree of superheat or degree of supercooling and the target superheat degree preset or target mistake Cold degree adjusts the aperture of electronic expansion valve of indoor unit.
It is understood that generally, during refrigeration, ambient temperature is higher, and evaporating pressure is relatively low;Cause This is during refrigeration, when described saturation temperature value is less than or equal to the first preset value and indoor environment When the difference of temperature and described saturation temperature value is more than or equal to the second preset value, higher by setting one Target superheat degree.When indoor set and off-premises station connecting pipings are longer, loine pressure is relatively big, usually can lead Cause saturation temperature value higher, heat transfer temperature difference is less than normal, or the indoor temperature difference of each indoor set relatively time, indoor set It is likely to occur certain bias current, in order to ensure that each indoor set has certain exchange capability of heat, can suitably increase The aperture of the electric expansion valve of big indoor set;Therefore during refrigeration, when described saturation temperature value is big In described first preset value or indoor environment temperature and the difference of described saturation temperature value less than described the During two preset values, will a relatively low target superheat degree be set.Due to when air conditioner refrigerating runs, according to The compressor behavior of air-conditioning, dynamically adjusts the target superheat degree set, such that it is able to effectively Ensure the heat exchange efficiency of each indoor set, improve the reliability of operation of air conditioner.
Further, with reference to Fig. 5 based on electronic expansion valve of indoor unit control method first embodiment of the present invention, In electronic expansion valve of indoor unit control method the 3rd embodiment of the present invention, this electronic expansion valve of indoor unit is adjusted Joint method includes:
Step S60, when described air-conditioning heating runs, when indoor set hydrops coefficient less than or etc. When three preset values, the first preset degree of supercooling is set to described target degree of supercooling;When amassing of indoor set When liquid coefficient is more than three preset values, the second preset degree of supercooling is set to described target degree of supercooling;Described First preset degree of supercooling is more than described second preset degree of supercooling;
Step S10, obtains the pressure in the first coolant pipe end in the indoor set that preset pressure sensor is detected Value;The refrigerant exit end of described indoor set when described first coolant pipe end is air conditioner refrigerating operation;
Step S20, calculates, according to described force value, the saturation temperature value that coolant is corresponding;
Step S30, refrigerant temperature when flowing out according to coolant in described saturation temperature value and indoor set calculates The degree of superheat of indoor set or degree of supercooling;
Step S40, according to the calculated degree of superheat or degree of supercooling and the target superheat degree preset or target mistake Cold degree adjusts the aperture of electronic expansion valve of indoor unit.
It is understood that the calculation for the hydrops coefficient of indoor set can be entered according to actual needs Row is arranged, in this embodiment, it is preferred that, can first calculate described saturation temperature value and indoor set the The difference of temperature T2A of two coolant pipe ends obtains the first difference, and calculates described saturation temperature value with indoor The difference of ambient temperature obtains the second difference;Then described first difference is calculated worth with the ratio of the second difference To described hydrops coefficient.Specifically, in the present embodiment, when air-conditioning heating runs, above-mentioned hydrops coefficient For K, saturation temperature value be TC, indoor environment temperature be the temperature of T1 and the second coolant pipe end be T2A, Then there is hydrops COEFFICIENT K=(TC-T2A)/(TC-T1).Meanwhile, the hydrops system that n-th indoor set is corresponding Number is K=(TC-T2An)/(TC-T1n);Wherein T1nRepresent, the indoor residing for n-th indoor set Ambient temperature, T2AnThe temperature of the second coolant pipe end of n-th indoor set.
It is understood that in the present embodiment, under air-conditioning heating running status, when the hydrops of indoor set When coefficient is less than or equal to three preset values, then it is assumed that more closed by the cold medium flux of indoor set heat exchanger Reason, in heat exchanger, coolant is gaseous coolant, and interior function power is secure;Now can arrange one bigger Target degree of supercooling.Under air-conditioning heating running status, when the hydrops coefficient of indoor set is more than the 3rd preset value Time, it is believed that interior machine hydrops, need to increase electronic expansion valve opening and carry out discharge opeing;At this time, it may be necessary to arrange one Individual less target degree of supercooling.Due to when air-conditioning heating runs, according to the compressor behavior of air-conditioning, The target superheat degree set dynamically is adjusted, such that it is able to the heat exchange efficiency of each indoor set is effectively ensured, Improve the reliability of operation of air conditioner.
The present invention also provides for a kind of electronic expansion valve of indoor unit adjusting means, with reference to Fig. 6, in one embodiment, The electronic expansion valve of indoor unit adjusting means that the present invention provides includes:
Acquisition module 10, for obtaining the first coolant pipe end in the indoor set that preset pressure sensor is detected Interior force value;The refrigerant exit end of described indoor set when described first coolant pipe end is air conditioner refrigerating operation;
The electronic expansion valve of indoor unit adjusting means that the embodiment of the present invention provides is mainly used in multi-gang air-conditioner In system, this multi-online air-conditioning system includes multiple indoor set, and each indoor set includes the first coolant Pipe end and the second coolant pipe end, the first coolant pipe end of each first indoor set all by an arm with same always Pipe connects.In the present embodiment, generally, can from a tube voltage drop for house steward's difference to each indoor set To ignore, therefore pressure transducer can be set on arm and detect the pressure in the first coolant pipe end Value (can arrange pressure transducer on an arm, and be all indoor sets by the design of pressure of detection The force value of the first coolant pipe end, it is also possible to be respectively provided with a pressure transducer to obtain more at each arm Force value accurately), it is also possible to pressure transducer detection is set on house steward and obtains the first cold of each indoor set Force value in matchmaker's pipe end.
In the present embodiment, when above-mentioned first coolant pipe end is air conditioner refrigerating operation, the coolant of described indoor set goes out Mouth end, the refrigerant inlet end of indoor set when also running for air-conditioning heating.The most above-mentioned pressure transducer both may be used During detection refrigeration, the evaporating pressure of indoor set, can detect again the condensing pressure of indoor machine during heating.
First computing module 20, for calculating, according to described force value, the saturation temperature value that coolant is corresponding;
Under different force value, corresponding saturation temperature is inconsistent, and all corresponding existence of each force value One saturation temperature value, can obtain correspondence according to the size of force value by the way of tabling look-up or calculating Saturation temperature value.Owing to the first coolant pipe end of each indoor set is interconnected by house steward, the most each indoor The saturation temperature value of machine is the most consistent.
Second computing module 30, during for flowing out according to coolant in described saturation temperature value and indoor set Refrigerant temperature calculates the degree of superheat or the degree of supercooling of indoor set;
In the case of obtaining saturation temperature value, the degree of superheat of indoor set can be calculated according to saturation temperature value Or degree of supercooling.It is understood that when refrigeration, calculating is the degree of superheat;When heating, calculate Be refrigeration degree.When calculating degree of supercooling and the degree of superheat, in addition it is also necessary to combine coolant and change in indoor set The refrigerant temperature of corresponding outlet after heat.Specifically, described second computing module 30 is specifically used for, and works as institute When stating air conditioner refrigerating operation, obtain temperature T2B of described first coolant pipe end, and calculate described temperature T2B The degree of superheat that described indoor set is corresponding is obtained with the difference of described saturation temperature value;When described air-conditioning heating is transported During row, obtain temperature T2A of described second coolant pipe end, and calculate described saturation temperature value and described temperature The difference of degree T2A obtains the degree of superheat that described indoor set is corresponding.
Adjustment module 40, for according to the calculated degree of superheat or degree of supercooling and the target superheat degree preset Or target degree of supercooling adjusts the aperture of electronic expansion valve of indoor unit.
Common, each indoor set is provided with target superheat degree and target degree of supercooling, for according to current The degree of superheat and degree of supercooling compare with target superheat degree and target degree of supercooling, swollen to adjust indoor set electronics The aperture of swollen valve.This target superheat degree and target degree of supercooling can be specifically to be worth, it is also possible to be one Specific scope, does not do at this and limits further.
The embodiment of the present invention is by obtaining the first coolant pipe end in the indoor set that preset pressure sensor is detected Interior force value;The saturation temperature value that coolant is corresponding is calculated according to described force value;According to described saturated temperature Refrigerant temperature when coolant flows out in angle value and indoor set calculates the degree of superheat or the degree of supercooling of indoor set; Indoor are adjusted with the target superheat degree preset or target degree of supercooling according to the calculated degree of superheat or degree of supercooling The aperture of organic electronic expansion valve.Due to by arrange pressure transducer detection calculation of pressure saturation temperature value, Temperature value according to saturation temperature value and refrigerant exit calculates the degree of superheat or degree of supercooling, relative to existing skill The value that art detects only with a temperature sensor calculates, and therefore improves the degree of superheat and degree of supercooling The precision calculated.
Further, with reference to Fig. 7, based on electronic expansion valve of indoor unit adjusting means first embodiment of the present invention, In electronic expansion valve of indoor unit adjusting means the second embodiment of the present invention, this electronic expansion valve of indoor unit is adjusted Regulating device includes:
Acquisition module 10, for obtaining the first coolant pipe end in the indoor set that preset pressure sensor is detected Interior force value;The refrigerant exit end of described indoor set when described first coolant pipe end is air conditioner refrigerating operation;
First computing module 20, for calculating, according to described force value, the saturation temperature value that coolant is corresponding;
Second computing module 30, during for flowing out according to coolant in described saturation temperature value and indoor set Refrigerant temperature calculates the degree of superheat or the degree of supercooling of indoor set;
Adjustment module 40, for according to the calculated degree of superheat or degree of supercooling and the target superheat degree preset Or target degree of supercooling adjusts the aperture of electronic expansion valve of indoor unit;
First setting module 50, for when described air conditioner refrigerating runs, when described saturation temperature Value less than or equal to the first preset value and indoor environment temperature and described saturation temperature value difference more than or During equal to the second preset value, the first preset degree of superheat is set as described target superheat degree;When described saturated Temperature value is little with the difference of described saturation temperature value more than described first preset value or indoor environment temperature When described second preset value, the second preset degree of superheat is set as described target superheat degree;Described first The preset degree of superheat is more than the described second preset degree of superheat.
It is understood that generally, during refrigeration, ambient temperature is higher, and evaporating pressure is relatively low;Cause This is during refrigeration, when described saturation temperature value is less than or equal to the first preset value and indoor environment When the difference of temperature and described saturation temperature value is more than or equal to the second preset value, higher by setting one Target superheat degree.When indoor set and off-premises station connecting pipings are longer, loine pressure is relatively big, usually can lead Cause saturation temperature value higher, heat transfer temperature difference is less than normal, or the indoor temperature difference of each indoor set relatively time, indoor set It is likely to occur certain bias current, in order to ensure that each indoor set has certain exchange capability of heat, can suitably increase The aperture of the electric expansion valve of big indoor set;Therefore during refrigeration, when described saturation temperature value is big In described first preset value or indoor environment temperature and the difference of described saturation temperature value less than described the During two preset values, will a relatively low target superheat degree be set.Due to when air conditioner refrigerating runs, according to The compressor behavior of air-conditioning, dynamically adjusts the target superheat degree set, such that it is able to effectively Ensure the heat exchange efficiency of each indoor set, improve the reliability of operation of air conditioner.
Further, with reference to Fig. 8, based on electronic expansion valve of indoor unit adjusting means first embodiment of the present invention, In electronic expansion valve of indoor unit adjusting means the 3rd embodiment of the present invention, this electronic expansion valve of indoor unit is adjusted Regulating device includes:
Acquisition module 10, for obtaining the first coolant pipe end in the indoor set that preset pressure sensor is detected Interior force value;The refrigerant exit end of described indoor set when described first coolant pipe end is air conditioner refrigerating operation;
First computing module 20, for calculating, according to described force value, the saturation temperature value that coolant is corresponding;
Second computing module 30, during for flowing out according to coolant in described saturation temperature value and indoor set Refrigerant temperature calculates the degree of superheat or the degree of supercooling of indoor set;
Adjustment module 40, for according to the calculated degree of superheat or degree of supercooling and the target superheat degree preset Or target degree of supercooling adjusts the aperture of electronic expansion valve of indoor unit;
Second setting module 60, for when described air-conditioning heating runs, when the hydrops of indoor set When coefficient is less than or equal to three preset values, the first preset degree of supercooling is set to described target degree of supercooling; When the hydrops coefficient of indoor set is more than three preset values, the second preset degree of supercooling is set to described target Degree of supercooling;Described first preset degree of supercooling is more than described second preset degree of supercooling.
It is understood that the calculation for the hydrops coefficient of indoor set can be entered according to actual needs Row is arranged, in this embodiment, it is preferred that, this electronic expansion valve of indoor unit adjusting means also includes, the Three computing modules, for calculating described saturation temperature value temperature T2A with indoor set the second coolant pipe end Difference obtains the first difference, and the difference calculating described saturation temperature value and indoor environment temperature obtains second Difference;Calculate described first difference and be worth to described hydrops coefficient with the ratio of the second difference.
Specifically, in the present embodiment, when air-conditioning heating runs, above-mentioned hydrops coefficient is K, saturated temperature Angle value is TC, indoor environment temperature is T1 and the temperature of the second coolant pipe end is T2A, then have hydrops COEFFICIENT K=(TC-T2A)/(TC-T1).Meanwhile, the hydrops coefficient that n-th indoor set is corresponding is K= (TC-T2An)/(TC-T1n);Wherein T1nRepresent, the indoor environment temperature residing for n-th indoor set, T2AnThe temperature of the second coolant pipe end of n-th indoor set.
It is understood that in the present embodiment, under air-conditioning heating running status, when the hydrops of indoor set When coefficient is less than or equal to three preset values, then it is assumed that more closed by the cold medium flux of indoor set heat exchanger Reason, in heat exchanger, coolant is gaseous coolant, and interior function power is secure;Now can arrange one bigger Target degree of supercooling.Under air-conditioning heating running status, when the hydrops coefficient of indoor set is more than the 3rd preset value Time, it is believed that interior machine hydrops, need to increase electronic expansion valve opening and carry out discharge opeing;At this time, it may be necessary to arrange one Individual less target degree of supercooling.Due to when air-conditioning heating runs, according to the compressor behavior of air-conditioning, The target superheat degree set dynamically is adjusted, such that it is able to the heat exchange efficiency of each indoor set is effectively ensured, Improve the reliability of operation of air conditioner.
These are only the preferred embodiments of the present invention, not thereby limit the scope of the claims of the present invention, every Utilize equivalent structure or equivalence flow process conversion that description of the invention and accompanying drawing content made, or directly or Connect and be used in other relevant technical fields, be the most in like manner included in the scope of patent protection of the present invention.

Claims (10)

1. an electronic expansion valve of indoor unit control method, it is characterised in that described indoor set electronic expansion Valve regulation method comprises the following steps:
Obtain the force value in the first coolant pipe end in the indoor set that preset pressure sensor is detected;Described The refrigerant exit end of described indoor set when first coolant pipe end is air conditioner refrigerating operation;
The saturation temperature value that coolant is corresponding is calculated according to described force value;
Refrigerant temperature when flowing out according to coolant in described saturation temperature value and indoor set calculates indoor set The degree of superheat or degree of supercooling;
Adjust with the target superheat degree preset or target degree of supercooling according to the calculated degree of superheat or degree of supercooling The aperture of electronic expansion valve of indoor unit.
2. electronic expansion valve of indoor unit control method as claimed in claim 1, it is characterised in that described Refrigerant temperature when flowing out according to coolant in described saturation temperature value and indoor set calculates the overheated of indoor set Degree or degree of supercooling include:
When described air conditioner refrigerating runs, obtain temperature T2B of described first coolant pipe end, and calculate institute State temperature T2B and obtain, with the difference of described saturation temperature value, the degree of superheat that described indoor set is corresponding;
When described air-conditioning heating runs, obtain temperature T2A of described second coolant pipe end, and calculate institute State saturation temperature value and obtain, with the difference of described temperature T2A, the degree of superheat that described indoor set is corresponding.
3. electronic expansion valve of indoor unit control method as claimed in claim 1, it is characterised in that described Electronic expansion valve of indoor unit control method also includes:
When described air conditioner refrigerating runs, when described saturation temperature value is preset less than or equal to first When the difference of value and indoor environment temperature and described saturation temperature value is more than or equal to the second preset value, will The first preset degree of superheat is set as described target superheat degree;When described saturation temperature value is first pre-more than described If the difference of value or indoor environment temperature and described saturation temperature value is less than described second preset value, The second preset degree of superheat is set as described target superheat degree;The described first preset degree of superheat is more than described the The two preset degrees of superheat.
4. electronic expansion valve of indoor unit control method as claimed any one in claims 1 to 3, it is special Levying and be, described electronic expansion valve of indoor unit control method also includes:
When described air-conditioning heating runs, when the hydrops coefficient of indoor set is pre-less than or equal to the 3rd If during value, the first preset degree of supercooling being set to described target degree of supercooling;When the hydrops coefficient of indoor set is big When three preset values, the second preset degree of supercooling is set to described target degree of supercooling;Described first preset Degree of supercooling is more than described second preset degree of supercooling.
5. electronic expansion valve of indoor unit control method as claimed in claim 4, it is characterised in that described room Interior organic electronic expansion valve control method also includes:
The difference of temperature T2A calculating described saturation temperature value and indoor set the second coolant pipe end obtains the One difference, and the difference calculating described saturation temperature value and indoor environment temperature obtains the second difference;
Calculate described first difference and be worth to described hydrops coefficient with the ratio of the second difference.
6. an electronic expansion valve of indoor unit adjusting means, it is characterised in that described indoor set electronic expansion Valve-regulated devices includes:
Acquisition module, for obtaining in the indoor set that preset pressure sensor is detected in the first coolant pipe end Force value;The refrigerant exit end of described indoor set when described first coolant pipe end is air conditioner refrigerating operation;
First computing module, for calculating, according to described force value, the saturation temperature value that coolant is corresponding;
Second computing module, for according in described saturation temperature value and indoor set coolant flow out time cold The degree of superheat of matchmaker's temperature computation indoor set or degree of supercooling;
Adjustment module, for according to the calculated degree of superheat or degree of supercooling and the target superheat degree preset or Target degree of supercooling adjusts the aperture of electronic expansion valve of indoor unit.
7. electronic expansion valve of indoor unit adjusting means as claimed in claim 6, it is characterised in that described Second computing module is specifically used for, and when described air conditioner refrigerating runs, obtains described first coolant pipe end Temperature T2B, and the difference calculating described temperature T2B and described saturation temperature value obtains described indoor set The corresponding degree of superheat;When described air-conditioning heating runs, obtain temperature T2A of described second coolant pipe end, And calculate described saturation temperature value and obtain corresponding overheated of described indoor set with the difference of described temperature T2A Degree.
8. electronic expansion valve of indoor unit adjusting means as claimed in claim 6, it is characterised in that described Electronic expansion valve of indoor unit adjusting means also includes:
First setting module, for when described air conditioner refrigerating runs, when described saturation temperature value Less than or equal to the first preset value and indoor environment temperature and described saturation temperature value difference more than or etc. When the second preset value, the first preset degree of superheat is set as described target superheat degree;When described saturated temperature Angle value is less than more than the difference of described first preset value or indoor environment temperature with described saturation temperature value During described second preset value, the second preset degree of superheat is set as described target superheat degree;Described first pre- Put the degree of superheat more than the described second preset degree of superheat.
9. the electronic expansion valve of indoor unit adjusting means as according to any one of claim 6 to 8, it is special Levying and be, described electronic expansion valve of indoor unit adjusting means also includes:
Second setting module, for when described air-conditioning heating runs, when the hydrops system of indoor set When number is less than or equal to three preset values, the first preset degree of supercooling is set to described target degree of supercooling;When When the hydrops coefficient of indoor set is more than three preset values, the second preset degree of supercooling is set to described target mistake Cold degree;Described first preset degree of supercooling is more than described second preset degree of supercooling.
10. electronic expansion valve of indoor unit adjusting means as claimed in claim 9, it is characterised in that described Electronic expansion valve of indoor unit adjusting means also includes:
3rd computing module, for calculating the temperature of described saturation temperature value and indoor set the second coolant pipe end The difference of T2A obtains the first difference, and the difference calculating described saturation temperature value and indoor environment temperature obtains To the second difference;Calculate described first difference and be worth to described hydrops coefficient with the ratio of the second difference.
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CN110360729A (en) * 2018-04-09 2019-10-22 珠海格力电器股份有限公司 A kind of high head pressure control method of unit, device and air-conditioning equipment
CN110579046A (en) * 2019-09-27 2019-12-17 海信(山东)空调有限公司 Control method and device for electronic expansion valve in multi-split refrigeration operation
CN111322675A (en) * 2020-03-09 2020-06-23 广东美的暖通设备有限公司 Multi-split air conditioning system, control method and control device thereof, and storage medium
CN111520868A (en) * 2020-05-25 2020-08-11 广东志高暖通设备股份有限公司 Indoor unit refrigerant distribution control method of multi-split system

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CN109916043A (en) * 2019-02-02 2019-06-21 广东美的暖通设备有限公司 The control method and air-conditioning system of pattern switching
CN109899931A (en) * 2019-03-12 2019-06-18 广东美的暖通设备有限公司 The control method and device of multi-line system efficiency optimization
CN110160231A (en) * 2019-05-29 2019-08-23 广东美的暖通设备有限公司 Valve body control method, indoor unit and computer readable storage medium
CN110579046A (en) * 2019-09-27 2019-12-17 海信(山东)空调有限公司 Control method and device for electronic expansion valve in multi-split refrigeration operation
CN111322675A (en) * 2020-03-09 2020-06-23 广东美的暖通设备有限公司 Multi-split air conditioning system, control method and control device thereof, and storage medium
CN111520868A (en) * 2020-05-25 2020-08-11 广东志高暖通设备股份有限公司 Indoor unit refrigerant distribution control method of multi-split system

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