CN111306718B - Air conditioner operation control method and device, readable storage medium and air conditioner - Google Patents

Air conditioner operation control method and device, readable storage medium and air conditioner Download PDF

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CN111306718B
CN111306718B CN202010102634.3A CN202010102634A CN111306718B CN 111306718 B CN111306718 B CN 111306718B CN 202010102634 A CN202010102634 A CN 202010102634A CN 111306718 B CN111306718 B CN 111306718B
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air conditioner
output capacity
current air
temperature
determining
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CN111306718A (en
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何伟强
黄杰
刘慧�
赵军猛
缪万磊
张静
潘子豪
周文伟
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Gree Electric Appliances Inc of Zhuhai
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Gree Electric Appliances Inc of Zhuhai
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/64—Electronic processing using pre-stored data
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
    • F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
    • F24F11/77—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity by controlling the speed of ventilators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
    • F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/86—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

Abstract

The application relates to an air conditioner operation control method, an air conditioner operation control device, a readable storage medium and an air conditioner, and relates to the technical field of air conditioner control, wherein the control method comprises the following steps: determining a refrigerant flow rate; determining the inlet and outlet enthalpy difference of a refrigerant in the heat exchanger; and calculating the current air conditioner output capacity according to the refrigerant flow and the difference of the in-out enthalpy of the refrigerant in the heat exchanger. According to the technical scheme, the air outlet temperature of the air conditioner can be intelligently and flexibly adjusted, so that the air outlet temperature of the air conditioner can achieve the expected effect; the indoor temperature can be kept stable, so that the comfort and the user experience of the air conditioner are improved, and the influence on the body of a user due to the rapid change of the indoor temperature is avoided.

Description

Air conditioner operation control method and device, readable storage medium and air conditioner
Technical Field
The application belongs to the technical field of air conditioner control, and particularly relates to an air conditioner operation control method and device, a readable storage medium and an air conditioner.
Background
The air conditioner temperature control is usually carried out by measuring the return air temperature, the control effect of the mode is rough, the indoor temperature drop rate or the indoor temperature rise rate cannot be accurately controlled, and the full-load operation is generally adopted, so that the room temperature is changed rapidly, the outlet air temperature is difficult to control within the range of a human body comfortable area, the comfortable effect of the air conditioner is reduced, and the human body health is not good.
Comfort level is one of important indexes for measuring the quality of the air conditioner, and the air-out temperature of the air conditioner is an important parameter of the comfort level, so that the problem that how to accurately control the air-out temperature of the air conditioner according to the needs of a user is always a problem of much attention in the technical field of air conditioners.
In the related art, a method for controlling a variable frequency air conditioner is to use the most direct air conditioner output capacity as a control object, and the object-oriented control method is more intelligent, so that the problem of inevitable fluctuation of temperature control can be solved, the change speed of room temperature can be controlled, dynamic control is realized, and high efficiency and energy conservation are achieved.
Disclosure of Invention
In order to overcome the problem of lack of an air conditioner output capacity acquisition method in the related art at least to a certain extent, the application provides an air conditioner operation control method, an air conditioner operation control device, a readable storage medium and an air conditioner.
In order to achieve the purpose, the following technical scheme is adopted in the application:
in a first aspect,
there is provided an air conditioner operation control method, the method including:
determining a refrigerant flow rate;
determining the inlet and outlet enthalpy difference of a refrigerant in the heat exchanger;
and calculating the current output capacity of the air conditioner according to the refrigerant flow and the difference of the in-out enthalpy of the refrigerant in the heat exchanger.
Preferably, the method further comprises:
calculating the heat capacity coefficient of the room;
and correcting the current air conditioner output capacity according to the room heat capacity coefficient so as to enable the current air conditioner output capacity to be matched with a target indoor temperature change rate.
Preferably, before the correcting the current air conditioner output capacity according to the room heat capacity coefficient, the method further includes:
acquiring the current indoor temperature change rate;
acquiring a rate difference value between the current indoor temperature change rate and a target indoor temperature change rate;
and the current air conditioner output capacity is corrected according to the room heat capacity coefficient as follows: and if the rate difference value is out of a first preset value range, continuously calculating the heat capacity coefficient of the room until the rate difference value is in the first preset value range, and correcting the current air conditioner output capacity according to the heat capacity coefficient of the room.
Preferably, the method further comprises:
and controlling the air outlet temperature of the air conditioner according to the corrected current air conditioner output capacity.
Preferably, the calculating the current air conditioner output capacity according to the refrigerant flow and the difference between the refrigerant inlet enthalpy and the refrigerant outlet enthalpy of the heat exchanger includes:
determining the current air conditioner output capacity Q according to the following formula:
Q＝qm×Δh；
in the above formula, qmDelta h is the difference of the inlet enthalpy and the outlet enthalpy of the refrigerant in the heat exchanger, namely the flow rate of the refrigerant.
Further, the correcting the current air conditioner output capacity according to the room heat capacity coefficient is that: and correcting the current air conditioner output capacity according to the room heat capacity coefficient and the indoor temperature change rate.
Further, the correcting the current air conditioner output capacity according to the room heat capacity coefficient and the indoor temperature change rate is as follows:
correcting the air conditioner output capacity according to the current room load according to the following formula:
Q′＝Q-C1(TS1-TS2)；
in the above formula, Q' is the current air conditioner output capacity corrected according to the heat capacity coefficient of the room, and Q is QFront air conditioner output capacity, C1Is the heat capacity coefficient, TS1For the current indoor temperature change rate, TS2Is the target indoor temperature change rate.
Further, the controlling the air conditioner air outlet temperature according to the corrected current air conditioner output capacity includes:
determining the wind gear of the internal machine according to the corrected current air conditioner output capacity;
acquiring the frequency of a compressor and the opening degree of an expansion valve by using the corrected output capacity of the air conditioner;
and if the temperature difference is out of a second preset value range, determining the wind gear, the compressor frequency and the opening degree of the expansion valve of the indoor unit again according to the corrected current air conditioner output capacity until the temperature difference is in the second preset value range.
Further, the determining the wind gear of the internal machine according to the corrected current air conditioner output capacity includes:
obtaining the air quantity of an internal machine by using the corrected current air conditioner output capacity;
and determining the wind gear of the internal machine according to the air quantity of the internal machine.
Further, the obtaining of the indoor unit air volume by using the corrected current air conditioner output capacity includes:
the indoor unit air volume V is determined according to the following formula:
Figure GDA0002950567240000031
in the above formula, Q' is the corrected current air conditioner output capacity, a1Is the latent heat of vaporization of water, d is the internal machine dehumidification, TIntoIs the return air temperature of the internal machine, TGo outThe air outlet temperature of the internal machine is shown, and c is the air specific volumetric heat capacity;
further, the acquiring a compressor frequency and an expansion valve opening degree by using the corrected air conditioner output capacity includes:
determining the temperature of an inner machine pipe by using the corrected output capacity of the air conditioner and the return air temperature of the inner machine;
and acquiring the frequency of the compressor and the opening of the expansion valve according to the temperature of the inner machine pipe, the indoor environment temperature and the outdoor environment temperature.
In a second aspect of the present invention,
there is provided a readable storage medium having stored thereon an executable program, which when executed by a processor, implements the steps of the above-described air conditioner operation control method.
In a third aspect,
there is provided an air conditioner operation control apparatus, the apparatus including:
a refrigerant flow rate determining unit for determining a refrigerant flow rate;
the enthalpy difference determining unit is used for determining the inlet and outlet enthalpy differences of the refrigerant in the heat exchanger;
and the output capacity acquisition unit is used for calculating the output capacity of the air conditioner according to the refrigerant flow and the difference of the inlet enthalpy and the outlet enthalpy of the refrigerant in the heat exchanger.
Further, the output capability obtaining unit is specifically configured to determine the current air conditioner output capability Q according to the following formula:
Q＝qm×Δh；
in the above formula, qmDelta h is the difference of the inlet enthalpy and the outlet enthalpy of the refrigerant in the heat exchanger, namely the flow rate of the refrigerant.
Preferably, the apparatus further comprises:
the first acquisition unit is used for acquiring the current indoor temperature change rate;
the second acquiring unit is used for acquiring a rate difference value between the current indoor temperature change rate and a target indoor temperature change rate;
a judging unit, configured to correct the current air conditioner output capacity according to the room heat capacity coefficient, to: and if the rate difference value is out of a first preset value range, continuously calculating the heat capacity coefficient of the room until the rate difference value is in the first preset value range, and correcting the current air conditioner output capacity according to the heat capacity coefficient of the room.
Preferably, the apparatus further comprises:
the calculating unit is used for calculating the heat capacity coefficient of the room;
and the correction unit is used for correcting the current air conditioner output capacity according to the room heat capacity coefficient so as to enable the current air conditioner output capacity to be matched with a target indoor temperature change rate.
Further, the correction unit is specifically configured to correct the current air conditioner output capacity according to a room heat capacity coefficient and an indoor temperature change rate.
Further, the correcting unit corrects the current air conditioner output capacity according to the room heat capacity coefficient and the indoor temperature change rate, and includes correcting the current air conditioner output capacity according to the room heat capacity coefficient and the indoor temperature change rate according to the following formula:
Q′＝Q-C1(TS1-TS2)；
in the above formula, Q' is the current air conditioner output capacity corrected according to the room heat capacity coefficient, Q is the current air conditioner output capacity, C1Is the heat capacity coefficient, TS1For the current indoor temperature change rate, TS2Is the target indoor temperature change rate.
Preferably, the apparatus further comprises:
and the control unit is used for controlling the air outlet temperature of the air conditioner according to the corrected current air conditioner output capacity.
Further, the control unit includes:
the first determining module is used for determining the wind gear of the internal machine according to the corrected current air conditioner output capacity;
the acquisition module is used for acquiring the frequency of a compressor and the opening of an expansion valve by utilizing the corrected output capacity of the air conditioner;
the second determining module is used for determining the temperature difference between the current actual air outlet temperature and the preset air outlet temperature;
and the judging module is used for determining the wind gear, the compressor frequency and the opening degree of the expansion valve of the indoor unit again according to the corrected current air conditioner output capacity until the temperature difference is within a second preset value range if the temperature difference is outside the second preset value range.
Further, the first determining module includes:
the first obtaining submodule is used for obtaining the air volume of the internal machine by utilizing the corrected current air conditioner output capacity;
and the first determining submodule is used for determining the wind gear of the internal machine according to the air quantity of the internal machine.
Further, the first obtaining submodule is specifically configured to determine the indoor unit air volume V according to the following formula:
Figure GDA0002950567240000061
in the above formula, Q' is the corrected current air conditioner output capacity, a1Is the latent heat of vaporization of water, d is the internal machine dehumidification, TIntoIs the return air temperature of the internal machine, TGo outThe air outlet temperature of the internal machine is shown, and c is the air specific volumetric heat capacity;
further, the obtaining module includes:
the third determining submodule is used for determining the temperature of the inner machine pipe by utilizing the corrected output capacity of the air conditioner and the return air temperature of the inner machine;
and the second acquisition submodule is used for acquiring the frequency of the compressor and the opening of the expansion valve according to the temperature of the inner machine pipe, the indoor environment temperature and the outdoor environment temperature.
In a fourth aspect of the present invention,
an air conditioner is provided, which comprises the air conditioner operation control device.
The technical scheme provided by the embodiment of the application can have the following beneficial effects:
according to the air conditioner operation control method, the air conditioner operation control device, the readable storage medium and the air conditioner, the air conditioner output capacity is calculated according to the flow of the refrigerant and the inlet-outlet enthalpy difference of the refrigerant in the heat exchanger, an effective technical means is provided for obtaining the output capacity of the air conditioner, the current air conditioner output capacity is corrected by utilizing the room heat capacity coefficient, the air conditioner outlet air temperature is controlled according to the corrected current air conditioner output capacity, the air conditioner outlet air temperature can be intelligently and flexibly adjusted, and the air conditioner outlet air temperature can achieve the expected effect; the indoor temperature can be kept stable, so that the comfort and the user experience of the air conditioner are improved, and the influence on the body of a user due to the rapid change of the indoor temperature is avoided.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and together with the description, serve to explain the principles of the application.
Fig. 1 is a flowchart of an air conditioner operation control method according to an embodiment of the present application;
fig. 2 is a flowchart of another air conditioner operation control method according to an embodiment of the present application;
fig. 3 is a flowchart of another air conditioner operation control method according to an embodiment of the present application;
fig. 4 is a schematic view illustrating an operation flow of an air conditioner according to an embodiment of the present application;
fig. 5 is a schematic flow chart illustrating control of an air conditioner outlet air temperature in another air conditioner operation control method according to an embodiment of the present application;
fig. 6 is a schematic structural diagram of an air conditioner operation control device according to an embodiment of the present application;
fig. 7 is a schematic structural diagram of another air conditioner operation control device according to an embodiment of the present application.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.
Fig. 1 is a flowchart of an air conditioner operation control method according to an embodiment of the present application, as shown in fig. 1, the method may be used in a terminal, but is not limited to, and includes the following steps:
step 101: determining a refrigerant flow rate;
step 102: determining the inlet and outlet enthalpy difference of a refrigerant in the heat exchanger;
step 103: and calculating the current air conditioner output capacity according to the refrigerant flow and the difference of the in-out enthalpy of the refrigerant in the heat exchanger.
According to the air conditioner operation control method provided by the embodiment of the application, the output capacity of the air conditioner is calculated according to the flow rate of the refrigerant and the inlet-outlet enthalpy difference of the refrigerant in the heat exchanger, an effective technical means is provided for obtaining the output capacity of the air conditioner, more accurate operation parameters are provided for air conditioner control, a control basis is provided for intelligently and flexibly adjusting the outlet air temperature of the air conditioner, and the outlet air temperature of the air conditioner achieves the expected effect; the indoor temperature can be kept stable, so that the comfort and the user experience of the air conditioner are improved, and the influence on the body of a user due to the rapid change of the indoor temperature is avoided.
As a modification of the above embodiment, the embodiment of the present invention provides another air conditioner operation control method, see fig. 2, in which the dashed line in fig. 2 is an optional step, the method first determining the refrigerant flow rate and the difference in the refrigerant inlet and outlet enthalpy of the refrigerant in the heat exchanger; then, calculating the current air conditioner output capacity according to the refrigerant flow and the refrigerant inlet and outlet enthalpy difference of the refrigerant in the heat exchanger, and specifically, obtaining the current indoor temperature change rate by calculating the room heat capacity coefficient; and acquiring a rate difference value between the current indoor temperature change rate and the target indoor temperature change rate, correcting the current air conditioner output capacity according to the room heat capacity coefficient so as to enable the current air conditioner output capacity to be matched with the target indoor temperature change rate, then correcting the current air conditioner output capacity, and controlling the air outlet temperature according to the corrected current air conditioner output capacity.
It should be noted that, the method of controlling the air-out temperature of the air conditioner through the corrected current output capacity of the air conditioner has wide applicability, and is also applicable to even a complex air conditioner control system, thereby avoiding the defect that the air-out temperature is directly controlled by adjusting the frequency of the compressor in the related art.
In particular, referring to fig. 3, the method can be implemented by, but is not limited to, the following processes:
201: determining a refrigerant flow rate;
specifically, in some embodiments, the refrigerant flow rate q is determined as followsm：
Figure GDA0002950567240000081
In the formula, qvIs the volume flow of the refrigerant, vsIs the specific volume of air sucked.
202: determining the inlet and outlet enthalpy difference of a refrigerant in the heat exchanger;
specifically, in some embodiments, the enthalpy difference Δ h between the inlet air and the outlet air of the indoor unit is determined according to the following formula:
Δh＝hout-hin，
in the formula, houtThe enthalpy value of the outlet of the heat exchanger; h isinIs the enthalpy value of the inlet of the heat exchanger.
203: calculating the current air conditioner output capacity according to the refrigerant flow and the refrigerant inlet-outlet enthalpy difference in the heat exchanger; specifically, in some embodiments, the current air conditioner output capacity Q is determined according to the following equation:
Q＝qm×Δh；
in the above formula, qmDelta h is the difference of the inlet enthalpy and the outlet enthalpy of the refrigerant in the heat exchanger, namely the flow rate of the refrigerant.
As an alternative implementation manner of the present invention, in some embodiments, the refrigerant flow rate may also be measured by a flow meter, and the flow meter tests the liquid refrigerant volume flow rate before throttling, and then calculates the mass flow rate by density conversion.
In some optional embodiments, the operation process of the air conditioner mainly comprises four simple processes of evaporation, compression, condensation and throttling, the starting and ending state points of each process can be determined through measurement and calculation, the refrigerant flow can be calculated through parameters of a suction position, and the heat exchange amount of the evaporation and condensation processes can be obtained through thermodynamic calculation by using the state point parameters and the flow.
As shown in fig. 4, T1 (evaporation temperature) is the evaporation process saturation temperature; t2 (suction temperature) is the compressor suction temperature; t3 (discharge temperature) is the compressor discharge temperature; t4 (condensation temperature) is the condensation process saturation temperature; t5 (supercooling temperature) is a pre-throttling thermometer; p1 (low pressure) is the evaporation saturation temperature; p2 (high pressure) is the condensation saturation temperature; the operation process is measured from T1 to T5 periodically, and the calculation of the current air conditioner output capacity is realized through the following processes, but not limited to, the specific method is as follows:
firstly, the current air conditioner output capacity is calculated according to the following relation in the refrigeration mode:
first, the refrigerant flow rate q 'is determined by the following equation'm：
Figure GDA0002950567240000091
In the formula (II), q'vIs the refrigerant volume flow, v'sIs a specific volume of air suction, wherein, v's＝f(T2,P1)；
Secondly, the enthalpy difference deltah in the evaporation process is determined according to the following formulae：
Δhe＝h′out-h′in＝f(T2,P1)-f(T5,P2)
In the above formula, h'outIs enthalpy value h 'of refrigerant at outlet position of evaporator in cooling mode'inIn the refrigeration mode, the enthalpy value of a refrigerant at the inlet position of the evaporator is P1 ═ f (T1) and P2 ═ f (T2) which are corresponding function relations of the saturation temperature and pressure of the refrigerant, and T1 is the saturation temperature in the evaporation process;
finally, the current air conditioner output capacity Q under the refrigeration mode is determined according to the following formula1：
Q1＝q′m×Δhe；
Secondly, calculating the current air conditioner output capacity according to the following relation in the heating mode:
first, the order is determined according to the following formulaRefrigerant flow q ″)m：
Figure GDA0002950567240000101
In the above formula, q ″)vIs the volume flow of refrigerant, vsIs the specific volume of suction, wherein vs″＝f(T2,P1)；
Secondly, the enthalpy difference deltah in the evaporation process is determined according to the following formulac：
Δhc＝h″out-h″in＝f(T3,P2)-f(T5,P2)
In the above formula, h ″)outIs the enthalpy value, h ″, of the refrigerant at the outlet position of the evaporator in the heating modeinThe enthalpy value of the refrigerant at the inlet position of the evaporator in the heating mode;
finally, determining the current air conditioner output capacity Q of the heating mode according to the following formula2：
Q2＝q″m×Δhe。
204: calculating the heat capacity coefficient of the room; further optionally, in some embodiments, the room load L may be determined, but is not limited to, as follows:
L＝h1(TW-TN)；
in the above formula, h1For heat transfer coefficient, TWIs the outdoor ambient temperature, TNIs the indoor ambient temperature.
Further alternatively, in some embodiments, the room heat capacity coefficient C may be determined, but is not limited to, by1：
Figure GDA0002950567240000102
In the above formula, Q is the current air conditioner output capacity, L is the room load, TS1Is the current indoor temperature change rate.
205: acquiring the current indoor temperature change rate;
further optionally, in some embodiments, mayDetermining the current indoor temperature change rate T 'by, but not limited to'S：
Figure GDA0002950567240000111
Where T is the time interval and Δ T is the temperature change.
206: acquiring a rate difference value between the current indoor temperature change rate and the target indoor temperature change rate;
if the rate difference falls outside the first predetermined range, the heat capacity of the room is continuously calculated, step 204 is performed, and step 207 is performed until the rate difference falls within the first predetermined range.
It should be noted that, the skilled person can select the "first preset numerical range" according to the engineering requirement.
207: and correcting the current air conditioner output capacity according to the room heat capacity coefficient so as to match the current air conditioner output capacity with the target indoor temperature change rate.
It should be noted that, whether the room heat capacity coefficient is recalculated or not is determined according to whether the rate difference value falls outside the first preset value range or not, and the room heat capacity coefficient is used for correcting the output capacity of the air conditioner, so that the temperature change rate in the room is kept at the target temperature change speed, the adverse effect on the body of the user due to the rapid change of the indoor temperature is avoided, the comfort of the air conditioner is improved, and the user experience is improved.
Further optionally, in some embodiments, the current air conditioner output capacity is corrected according to the room heat capacity coefficient in step 207 as follows: correcting the current air conditioner output capacity according to the room heat capacity coefficient and the indoor temperature change rate;
specifically, optionally, the output capacity of the air conditioner is corrected according to the heat capacity coefficient of the room according to the following formula:
Q′＝Q-C1(TS1-TS2)；
in the above formula, Q' is the current air conditioner corrected according to the heat capacity coefficient of the roomOutput capacity, Q being the current air conditioner output capacity, C1Is the heat capacity coefficient of the room, TS1For the current indoor temperature change rate, TS2Is the target indoor temperature change rate.
208: and controlling the air outlet temperature of the air conditioner according to the corrected current air conditioner output capacity.
It should be noted that, the method of controlling the air-out temperature of the air conditioner through the corrected current output capacity of the air conditioner has wide applicability, and is also applicable to even a complex air conditioner control system, thereby avoiding the defect that the air-out temperature is directly controlled by adjusting the frequency of the compressor in the related art.
In some alternative embodiments, step 208 may be implemented, but is not limited to, by the following process:
2081: determining the wind gear of the internal machine according to the corrected current air conditioner output capacity;
2082: acquiring the frequency of a compressor and the opening of an expansion valve by using the corrected output capacity of the air conditioner;
2083: determining the temperature difference between the current actual air outlet temperature and the preset air outlet temperature;
2084: and if the temperature difference is out of the second preset numerical range, determining the frequency of the compressor and the opening degree of the expansion valve again according to the corrected output capacity of the air conditioner until the temperature difference is in the second preset numerical range.
It should be noted that, the skilled person can select the "second preset numerical range" according to the engineering requirement.
In some alternative embodiments, step 2081 may be, but is not limited to being, achieved by the following process:
2081 a: obtaining the air quantity of an internal machine by using the corrected current air conditioner output capacity;
further optionally, in some embodiments, the indoor unit air volume V may be determined according to, but not limited to, the following formula:
Figure GDA0002950567240000121
in the above formula, Q' is the corrected current nullOutput regulation capability, a1Is the latent heat of vaporization of water, d is the internal machine dehumidification, TIntoIs the return air temperature of the internal machine, TGo outThe air outlet temperature of the internal machine and the air specific volumetric heat capacity c.
2081 b: and determining the wind gear of the internal machine according to the air quantity of the internal machine.
Further optionally, in some embodiments, the wind gear of the internal machine is determined according to preset parameters and the air volume of the internal machine, for example, as the preset parameters in table 1, assuming that a certain air conditioner has n wind gears, V1, V2, V3 … … Vn-1 and Vn are all air volumes.
TABLE 1 Preset parameters
Air volume of indoor unit Inner machine windshield
Vn-1≤V＜Vn Wind screen n
…… ...…
V2≤V＜V3 Wind screen 2
V1≤V＜V2 Wind screen 1
In some alternative embodiments, step 2082 may be implemented, but is not limited to, by the following process:
2082 a: determining the temperature of the inner machine pipe by using the corrected current air conditioner output capacity and the inner machine return air temperature;
2082 b: and acquiring the frequency of the compressor and the opening degree of the expansion valve according to the temperature of the inner machine pipe, the indoor environment temperature and the outdoor environment temperature.
In some embodiments, as shown in fig. 5, the air conditioner outlet air temperature may be controlled according to the corrected current air conditioner output capacity according to the following steps:
step a: determining the corrected current air conditioner output capacity;
step b: calculating the wind gear of the indoor unit by using the corrected current air conditioner output capacity;
step c: determining the temperature of the inner machine pipe by using the corrected current air conditioner output capacity and the inner machine return air temperature;
step d: acquiring the frequency of a compressor and the opening degree of an expansion valve according to the temperature of an inner machine pipe, the indoor environment temperature and the outdoor environment temperature;
step e: judging whether the current air outlet temperature is consistent with the target air outlet temperature or not, and if so, returning to the step a; if not, returning to the step c.
Specifically, the step b comprises the following steps:
obtaining the air quantity of an internal machine by using the corrected current air conditioner output capacity;
and determining the wind gear of the internal machine according to the air quantity of the internal machine.
Specifically, the indoor unit air volume V is determined according to the following formula:
Figure GDA0002950567240000131
in the above formula, Q' is the corrected current air conditioner output capacity, a1Is the latent heat of vaporization of water, d is the internal machine dehumidification, TIntoIs the return air temperature of the internal machine, TGo outThe air outlet temperature of the internal machine and the air specific volumetric heat capacity c.
Embodiments of the present invention also provide a readable storage medium, on which an executable program is stored, and the executable program, when executed by a processor, implements the steps of the air conditioner operation control method.
According to the air conditioner operation control method and the readable storage medium, the output capacity of the air conditioner is calculated according to the flow rate of the refrigerant and the inlet-outlet enthalpy difference of the refrigerant in the heat exchanger, the current output capacity of the air conditioner is corrected by utilizing the heat capacity coefficient of a room, and the air outlet temperature of the air conditioner is controlled according to the corrected current output capacity of the air conditioner, so that the air outlet temperature of the air conditioner can be intelligently and flexibly adjusted, and the air outlet temperature of the air conditioner can achieve the expected effect; the indoor temperature can be kept stable, so that the comfort and the user experience of the air conditioner are improved, and the influence on the body of a user due to the rapid change of the indoor temperature is avoided.
In order to implement the above air conditioner operation control method in a coordinated manner, an embodiment of the present invention provides an air conditioner operation control apparatus, and with reference to fig. 6, the apparatus includes:
a refrigerant flow rate determining unit for determining a refrigerant flow rate;
the enthalpy difference determining unit is used for determining the inlet and outlet enthalpy differences of the refrigerant in the heat exchanger;
and the output capacity acquisition unit is used for calculating the output capacity of the air conditioner according to the flow rate of the refrigerant and the inlet-outlet enthalpy difference of the refrigerant in the heat exchanger.
According to the air conditioner operation control device provided by the embodiment of the invention, the air conditioner output capacity is calculated according to the flow rate and the enthalpy difference of the refrigerant, an effective technical means is provided for acquiring the air conditioner output capacity, a control basis is provided for intelligently and flexibly adjusting the air outlet temperature of the air conditioner, and the air outlet temperature of the air conditioner can reach an expected effect; the indoor temperature can be kept stable, so that the comfort and the user experience of the air conditioner are improved, and the influence on the body of a user due to the rapid change of the indoor temperature is avoided.
As a modification of the above embodiment, an embodiment of the present invention provides another air conditioner operation control device, as shown in fig. 7, including:
a refrigerant flow rate determining unit for determining a refrigerant flow rate;
the enthalpy difference determining unit is used for determining the inlet and outlet enthalpy differences of the refrigerant in the heat exchanger;
and the output capacity acquisition unit is used for calculating the output capacity of the air conditioner according to the flow rate of the refrigerant and the inlet-outlet enthalpy difference of the refrigerant in the heat exchanger.
Further optionally, the output capability obtaining unit includes:
the refrigerant flow rate q is determined bym：
Figure GDA0002950567240000151
In the above formula, qvIs the volume flow of the refrigerant, vsIs the specific volume of inspiration;
determining the inlet-outlet enthalpy difference delta h of the refrigerant in the heat exchanger according to the following formula:
Δh＝hout-hin；
in the above formula, houtThe enthalpy value of the outlet of the heat exchanger; h isinIs the enthalpy value of the inlet of the heat exchanger;
determining the current air conditioner output capacity Q according to the following formula:
Q＝qm×Δh。
further, the apparatus further comprises:
the first acquiring unit is used for acquiring the current indoor temperature change rate;
in some embodiments, the current indoor temperature rate of change T 'may be determined, but is not limited to'S：
Figure GDA0002950567240000152
In the above formula, T is a time interval, and Δ T is a temperature change amount.
The second acquiring unit is used for acquiring a rate difference value between the current indoor temperature change rate and the target indoor temperature change rate;
and the judging unit is used for correcting the current air conditioner output capacity according to the room heat capacity coefficient into: if the rate difference value is out of the first preset value range, continuously calculating the heat capacity coefficient of the room until the rate difference value is in the first preset value range, and correcting the current air conditioner output capacity according to the heat capacity coefficient of the room;
it should be noted that, the skilled person can select the "first preset numerical range" according to the engineering requirement.
Further, the apparatus further comprises:
the calculating unit is used for calculating the heat capacity coefficient of the room;
further optionally, in some embodiments, the room load L may be determined, but is not limited to, as follows:
L＝h1(TW-TN)；
in the above formula, h1For heat transfer coefficient, TWIs the outdoor ambient temperature, TNIs the indoor ambient temperature.
Determining the heat capacity coefficient C of the room according to the following formula1：
Figure GDA0002950567240000161
In the above formula, Q is the current air conditioner output capacity, L is the room load, TS1Is the current indoor temperature change rate.
And the correction unit is used for correcting the current air conditioner output capacity according to the room heat capacity coefficient so as to match the current air conditioner output capacity with the target indoor temperature change rate.
It should be noted that, whether the room heat capacity coefficient is recalculated or not is determined according to whether the rate difference value falls outside the first preset value range or not, and the room heat capacity coefficient is used for correcting the output capacity of the air conditioner, so that the temperature change rate in the room is kept at the target temperature change speed, the adverse effect on the body of the user due to the rapid change of the indoor temperature is avoided, the comfort of the air conditioner is improved, and the user experience is improved.
Further optionally, the correction unit is specifically configured to: and correcting the current air conditioner output capacity according to the room heat capacity coefficient and the indoor temperature change rate.
Further optionally, in some embodiments, the correcting unit corrects the current air conditioner output capacity according to the room heat capacity coefficient and the indoor temperature change rate, and includes correcting the current air conditioner output capacity according to the room heat capacity coefficient and the indoor temperature change rate as follows:
Q′＝Q-C1(TS1-TS2)
in the above formula, Q' is the current air conditioner output capacity corrected according to the room heat capacity coefficient, Q is the current air conditioner output capacity, C1Is the heat capacity coefficient, TS1For the current indoor temperature change rate, TS2Is the target indoor temperature change rate.
Further, the apparatus further comprises:
and the control unit is used for controlling the air outlet temperature of the air conditioner according to the corrected current air conditioner output capacity.
It should be noted that, the method of controlling the air-out temperature of the air conditioner through the corrected current output capacity of the air conditioner has wide applicability, and is also applicable to even a complex air conditioner control system, thereby avoiding the defect that the air-out temperature is directly controlled by adjusting the frequency of the compressor in the related art.
Further optionally, the control unit includes:
the first determining module is used for determining the wind gear of the internal machine according to the corrected current air conditioner output capacity;
the acquisition module is used for acquiring the frequency of the compressor and the opening of the expansion valve by utilizing the corrected output capacity of the air conditioner;
the second determining module is used for determining the temperature difference between the current actual air outlet temperature and the preset air outlet temperature;
and the judging module is used for determining the wind gear, the compressor frequency and the opening degree of the expansion valve of the indoor unit again according to the corrected current air conditioner output capacity until the temperature difference falls within the second preset numerical range if the temperature difference falls outside the second preset numerical range.
Specifically, optionally, the first determining module includes:
the first obtaining submodule is used for obtaining the air volume of the internal machine by using the corrected current air conditioner output capacity;
and the first determining submodule is used for determining the wind gear of the indoor unit according to the air quantity of the indoor unit.
Further, the first obtaining submodule is specifically configured to determine the indoor unit air volume V according to the following formula:
Figure GDA0002950567240000171
in the above formula, Q' is the corrected current air conditioner output capacity, a1Is the latent heat of vaporization of water, d is the internal machine dehumidification, TIntoIs the return air temperature of the internal machine, TGo outThe air outlet temperature of the internal machine is shown, and c is the air specific volumetric heat capacity;
further, the obtaining module includes:
the third determining submodule is used for determining the temperature of the inner machine pipe by utilizing the corrected output capacity of the air conditioner and the return air temperature of the inner machine;
and the second acquisition submodule is used for acquiring the frequency of the compressor and the opening of the expansion valve according to the temperature of the inner machine pipe, the indoor environment temperature and the outdoor environment temperature.
The embodiment of the invention also provides an air conditioner which comprises any one of the air conditioner operation control devices.
According to the air conditioner operation control device and the air conditioner, the current air conditioner output capacity is calculated according to the flow of the refrigerant and the inlet-outlet enthalpy difference of the refrigerant in the heat exchanger, the room heat capacity coefficient is used for correcting the air conditioner output capacity, and the air conditioner outlet air temperature is controlled according to the corrected current air conditioner output capacity, so that the air outlet temperature of the air conditioner can be intelligently and flexibly adjusted, and the air outlet temperature of the air conditioner can achieve the expected effect; the indoor temperature can be kept stable, so that the comfort and the user experience of the air conditioner are improved, and the influence on the body of a user due to the rapid change of the indoor temperature is avoided.
With regard to the apparatus in the above-described embodiment, the specific manner in which each module performs the operation has been described in detail in the embodiment related to the method, and will not be elaborated here.
It is understood that the same or similar parts in the above embodiments may be mutually referred to, and the same or similar parts in other embodiments may be referred to for the content which is not described in detail in some embodiments.
It should be noted that, in the description of the present application, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Further, in the description of the present application, the meaning of "a plurality" means at least two unless otherwise specified.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and the scope of the preferred embodiments of the present application includes other implementations in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the present application.
It should be understood that portions of the present application may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.
In addition, functional units in the embodiments of the present application may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may also be stored in a computer readable storage medium.
The storage medium mentioned above may be a read-only memory, a magnetic or optical disk, etc.
In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Although embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application, and that variations, modifications, substitutions and alterations may be made to the above embodiments by those of ordinary skill in the art within the scope of the present application.

Claims (13)

1. An air conditioner operation control method, characterized by comprising:
determining a refrigerant flow rate;
determining the inlet and outlet enthalpy difference of a refrigerant in the heat exchanger;
calculating the current air conditioner output capacity according to the refrigerant flow and the refrigerant inlet-outlet enthalpy difference in the heat exchanger;
calculating the heat capacity coefficient of the room;
and correcting the current air conditioner output capacity according to the room heat capacity coefficient so as to enable the current air conditioner output capacity to be matched with a target indoor temperature change rate.
2. The method of claim 1, further comprising, prior to said correcting said current air conditioning output capacity based on said room heat capacity coefficient:
acquiring the current indoor temperature change rate;
acquiring a rate difference value between the current indoor temperature change rate and a target indoor temperature change rate;
and the current air conditioner output capacity is corrected according to the room heat capacity coefficient as follows: and if the rate difference value is out of a first preset value range, continuously calculating the heat capacity coefficient of the room until the rate difference value is in the first preset value range, and correcting the current air conditioner output capacity according to the heat capacity coefficient of the room.
3. The method according to claim 1 or 2, characterized in that the method further comprises:
and controlling the air outlet temperature of the air conditioner according to the corrected current air conditioner output capacity.
4. The method of claim 1, wherein said calculating a current air conditioning output capacity based on said refrigerant flow and a refrigerant in-out enthalpy difference in said heat exchanger comprises:
determining the current air conditioner output capacity Q according to the following formula:
Q＝qm×Δh；
in the above formula, qmDelta h is the difference of the inlet enthalpy and the outlet enthalpy of the refrigerant in the heat exchanger, namely the flow rate of the refrigerant.
5. The method of claim 1 or 2, wherein the correcting the current air conditioning output capacity according to the room heat capacity coefficient is: and correcting the current air conditioner output capacity according to the room heat capacity coefficient and the indoor temperature change rate.
6. The method of claim 5, wherein said correcting said current air conditioning output capacity as a function of room heat capacity coefficient and rate of change of indoor temperature is:
correcting the current air conditioner output capacity according to the room heat capacity coefficient and the indoor temperature change rate according to the following formula:
Q′＝Q-C1(TS1-TS2)；
in the above formula, Q' is the current air conditioner output capacity corrected according to the room heat capacity coefficient, Q is the current air conditioner output capacity, C1Is the heat capacity coefficient of the room, TS1For the current indoor temperature change rate, TS2Is the target indoor temperature change rate.
7. The method of claim 3, wherein the controlling the air conditioner outlet air temperature according to the corrected current air conditioner output capacity comprises:
determining the wind gear of the internal machine according to the corrected current air conditioner output capacity;
acquiring the frequency of a compressor and the opening of an expansion valve by using the corrected current air conditioner output capacity;
determining the temperature difference between the current actual air outlet temperature and the preset air outlet temperature;
and if the temperature difference is out of a second preset value range, determining the wind gear, the compressor frequency and the opening degree of the expansion valve of the indoor unit again according to the corrected current air conditioner output capacity until the temperature difference is in the second preset value range.
8. The method of claim 7, wherein determining the wind gear of the internal machine according to the corrected current air conditioner output capacity comprises:
obtaining the air quantity of an internal machine by using the corrected current air conditioner output capacity;
and determining the wind gear of the internal machine according to the air quantity of the internal machine.
9. The method according to claim 8, wherein the obtaining of the indoor unit air volume by using the corrected current air conditioner output capacity comprises:
the indoor unit air volume V is determined according to the following formula:
Figure FDA0002850853250000031
in the above formula, Q' is the corrected current air conditioner output capacity, a1Is the latent heat of vaporization of water, d is the internal machine dehumidification, TIntoIs the return air temperature of the internal machine, TGo outThe air outlet temperature of the internal machine and the air specific volumetric heat capacity c.
10. The method of claim 7, wherein said obtaining a compressor frequency and an expansion valve opening degree using said corrected current air conditioner output capacity comprises:
determining the temperature of an inner machine pipe by using the corrected current air conditioner output capacity and the inner machine return air temperature;
and acquiring the frequency of the compressor and the opening of the expansion valve according to the temperature of the inner machine pipe, the indoor environment temperature and the outdoor environment temperature.
11. A readable storage medium having an executable program stored thereon, wherein the executable program, when executed by a processor, implements the steps of the air conditioner operation control method according to any one of claims 1 to 8.
12. An air conditioner operation control apparatus, characterized in that the apparatus comprises:
a refrigerant flow rate determining unit for determining a refrigerant flow rate;
the enthalpy difference determining unit is used for determining the inlet and outlet enthalpy differences of the refrigerant in the heat exchanger;
the output capacity acquisition unit is used for calculating the current air conditioner output capacity according to the refrigerant flow and the difference of the inlet enthalpy and the outlet enthalpy of the refrigerant in the heat exchanger;
the calculating unit is used for calculating the heat capacity coefficient of the room;
and the correction unit is used for correcting the current air conditioner output capacity according to the room heat capacity coefficient so as to enable the current air conditioner output capacity to be matched with a target indoor temperature change rate.
13. An air conditioner characterized by comprising the air conditioner operation control device according to claim 10.
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