CN114576825A - Air conditioner control method, air conditioner and readable storage medium - Google Patents

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

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Publication number
CN114576825A
CN114576825A CN202011371282.8A CN202011371282A CN114576825A CN 114576825 A CN114576825 A CN 114576825A CN 202011371282 A CN202011371282 A CN 202011371282A CN 114576825 A CN114576825 A CN 114576825A
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refrigerant
compressor
enthalpy
air
increasing
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CN114576825B (en
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许克
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Midea Group Co Ltd
GD Midea Air Conditioning Equipment Co Ltd
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Midea Group Co Ltd
GD Midea Air Conditioning Equipment Co Ltd
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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
    • F24F11/89—Arrangement or mounting of control or safety devices
    • 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
    • F24F11/88—Electrical aspects, e.g. circuits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B49/00—Arrangement or mounting of control or safety devices
    • F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
    • F25B49/022—Compressor control arrangements
    • 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 invention discloses an air conditioner control method, an air conditioner and a readable storage medium, comprising the following steps: determining the mass flow of a refrigerant of a compressor suction loop according to the parameters of the compressor; determining a compressor refrigerant enthalpy value parameter, a first refrigerant enthalpy value and an enthalpy-increasing refrigerant enthalpy value parameter of an air-supply enthalpy-increasing loop according to the refrigerant pressure information and the refrigerant temperature information; calculating to obtain the refrigerant mass flow of the air-supplying enthalpy-increasing loop according to the refrigerant enthalpy value parameter of the compressor, the enthalpy value of the first refrigerant, the enthalpy-increasing refrigerant enthalpy value parameter and the refrigerant mass flow of the air suction loop of the compressor; calculating to obtain the current air conditioner heating capacity according to the refrigerant mass flow of the air-supplying enthalpy-increasing loop, the refrigerant mass flow of the compressor air suction loop, the refrigerant enthalpy value parameter of the compressor and the first refrigerant enthalpy value; and controlling the opening of the air-supplying enthalpy-increasing valve according to the current heating capacity of the air conditioner. The opening of the air-supplying enthalpy-increasing valve is adjusted according to the heating capacity, the heating capacity can be directly taken as a control target, the opening of the air-supplying enthalpy-increasing valve can be adjusted in time, and the method is more accurate and quicker.

Description

Air conditioner control method, air conditioner and readable storage medium
Technical Field
The invention relates to the technical field of air conditioners, in particular to an air conditioner control method, an air conditioner and a readable storage medium.
Background
In order to improve the heating effect of the air conditioning system, an air-supplying enthalpy-increasing compressor is often adopted, in the prior art, the opening degree of an air-supplying enthalpy-increasing valve is usually adjusted according to the temperature of an outlet of a heat exchanger and the temperature of an outlet of the heat exchanger, but the opening degree of the air-supplying enthalpy-increasing valve is adjusted based on the temperature and has a certain lag, so that the opening degree of the air-supplying enthalpy-increasing valve cannot be adjusted in time.
Disclosure of Invention
The invention provides an air conditioner control method, an air conditioner and a readable storage medium, and aims to solve the problems that the opening of an air-supplying enthalpy-increasing valve cannot be adjusted in time due to certain lag existing in the process of adjusting the opening of the air-supplying enthalpy-increasing valve based on temperature.
In order to achieve the above object, the present invention provides a method for controlling an air conditioner, the method comprising the steps of:
acquiring refrigerant pressure information and refrigerant temperature information of a preset position in a heat exchange loop and compressor parameters;
calculating to obtain the refrigerant mass flow of the compressor air suction loop according to the compressor parameters;
determining a compressor refrigerant enthalpy value parameter, a first refrigerant enthalpy value at an inlet of an outdoor unit heat exchanger and an enthalpy-increasing refrigerant enthalpy value parameter of an air-supplying enthalpy-increasing loop according to the refrigerant pressure information and the refrigerant temperature information;
calculating to obtain the refrigerant mass flow of the air-supplying enthalpy-increasing loop according to the refrigerant enthalpy value parameter of the compressor, the enthalpy value of the first refrigerant, the enthalpy-increasing refrigerant enthalpy value parameter and the refrigerant mass flow of the air suction loop of the compressor;
calculating according to the refrigerant mass flow of the air-supplying enthalpy-increasing loop, the refrigerant mass flow of the compressor air suction loop, the refrigerant enthalpy value parameter of the compressor and the first refrigerant enthalpy value to obtain the air conditioner heating capacity of the current preset period;
and controlling the opening of the air adding enthalpy valve according to the air conditioning heating amount of the current preset period.
Optionally, the refrigerant pressure information includes a refrigerant pressure at a compressor suction port, and the refrigerant temperature information includes a refrigerant temperature at the compressor suction port; the step of calculating the refrigerant mass flow of the compressor suction loop according to the compressor parameters comprises the following steps:
determining the specific volume of the refrigerant at the air suction port of the compressor according to the pressure of the refrigerant at the air suction port of the compressor and the temperature of the refrigerant at the air suction port of the compressor;
and calculating the mass flow of the refrigerant of the air suction loop of the compressor according to the parameters of the compressor and the specific volume of the refrigerant at the air suction port of the compressor.
Optionally, the step of calculating the refrigerant mass flow of the compressor suction loop according to the compressor parameter and the refrigerant specific volume at the compressor suction port includes:
substituting the compressor parameter and the specific volume of the refrigerant at the air suction port of the compressor into a first preset formula to calculate the mass flow of the refrigerant in the air suction loop of the compressor, wherein the compressor parameter comprises a preset compressor flow coefficient, the current compressor running frequency and a preset compressor volume, and the first preset formula comprises the following steps:
Gm＝v×λ×f×P,
wherein G ismThe mass flow of the refrigerant of the air suction loop of the compressor, v is the specific volume of the refrigerant at the air suction port of the compressor, lambda is the flow coefficient of the compressor, f is the running frequency of the compressor, and P is the volume of the compressor.
Optionally, the enthalpy-increasing refrigerant enthalpy value parameter includes a second refrigerant enthalpy value close to an inlet of the compressor in the air-supply enthalpy-increasing loop and a third refrigerant enthalpy value at an inlet of the air-supply enthalpy-increasing valve; the step of calculating the refrigerant mass flow of the vapor-filling enthalpy-increasing loop according to the refrigerant enthalpy value parameter of the compressor, the enthalpy value of the first refrigerant, the enthalpy-increasing refrigerant enthalpy value parameter of the vapor-filling enthalpy-increasing loop and the refrigerant mass flow of the suction loop of the compressor comprises the following steps:
substituting the refrigerant enthalpy value of a compressor air suction port in the refrigerant enthalpy value parameter of the compressor, the first refrigerant enthalpy value, the refrigerant enthalpy value of a compressor inlet in an air-supply enthalpy-increasing loop, the refrigerant enthalpy value of an air-supply enthalpy-increasing valve inlet and the refrigerant mass flow of the compressor air suction loop into a second preset formula to calculate the refrigerant mass flow of the air-supply enthalpy-increasing loop, wherein the second preset formula is as follows:
Figure BDA0002806776950000021
wherein G is1Refrigerant mass flow, G, for the vapor-filling enthalpy-increasing circuitmIs the refrigerant mass flow h of the suction loop of the compressor5Is the enthalpy value of the third refrigerant, h3Is the enthalpy value of the second refrigerant, h4Is the enthalpy value, h, of the refrigerant at the air suction port of the compressor2Is the enthalpy value of the first refrigerant.
Optionally, the step of calculating the heating capacity of the air conditioner in the current preset period according to the refrigerant mass flow of the air-supplying enthalpy-increasing loop, the refrigerant mass flow of the compressor air-suction loop, the compressor refrigerant enthalpy value parameter and the first refrigerant enthalpy value includes:
substituting the refrigerant mass flow of the air-supplying enthalpy-increasing loop, the refrigerant mass flow of the compressor air suction loop, the refrigerant enthalpy value of the compressor air outlet in the refrigerant enthalpy value parameter of the compressor and the enthalpy value of the first refrigerant into a third preset formula to calculate the air conditioner heating capacity of the current preset period, wherein the third preset formula is as follows:
Q＝(G1+Gm)×(h1-h2)，
wherein Q is the heating capacity of the air conditioner in the current preset period, G1Refrigerant mass flow, G, for the vapor-filling enthalpy-increasing circuitmIs the refrigerant mass flow rate, h, of the suction loop of the compressor1Is the enthalpy value h of the refrigerant at the exhaust port of the compressor2Is the enthalpy value of the first refrigerant.
Optionally, the step of controlling the opening of the air enthalpy increasing valve according to the air conditioning heating capacity of the current preset period includes:
acquiring the heating capacity of the air conditioner in the previous preset period, and comparing the heating capacity of the air conditioner in the current preset period with the heating capacity of the air conditioner in the previous preset period;
and adjusting the opening of the air-supply enthalpy-increasing valve according to the comparison result.
Optionally, the step of adjusting the opening of the air-supply enthalpy-increasing valve according to the comparison result includes:
if the air-conditioning heating capacity of the current preset period is larger than that of the previous preset period, increasing the opening of the air-supplementing enthalpy-increasing valve to a first preset opening;
and if the air-conditioning heating capacity of the current preset period is smaller than that of the previous preset period, reducing the opening of the air-supplementing enthalpy-increasing valve to a second preset opening.
Optionally, the step of obtaining refrigerant pressure information and refrigerant temperature information of a preset position in the heat exchange loop and the compressor parameter includes:
after the heating mode is started, refrigerant pressure information and refrigerant temperature information of preset positions in the heat exchange loop and compressor parameters are acquired at preset time intervals.
In addition, to achieve the above object, the present invention also provides an air conditioner including: a communication module, a memory, a processor and a computer program stored on the memory and executable on the processor, the computer program, when executed by the processor, implementing the steps of the air conditioner control method as described above.
Further, to achieve the above object, the present invention also provides a readable storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of the air conditioner control method as described above.
The method comprises the steps of obtaining refrigerant pressure information and refrigerant temperature information of a preset position in a heat exchange loop and compressor parameters; calculating to obtain the refrigerant mass flow of the compressor air suction loop according to the compressor parameters; determining a compressor refrigerant enthalpy value parameter, a first refrigerant enthalpy value at an inlet of an outdoor unit heat exchanger and an enthalpy-increasing refrigerant enthalpy value parameter of an air-supplying enthalpy-increasing loop according to the refrigerant pressure information and the refrigerant temperature information; calculating to obtain the refrigerant mass flow of the air-supplying enthalpy-increasing loop according to the refrigerant enthalpy value parameter of the compressor, the enthalpy value of the first refrigerant, the enthalpy-increasing refrigerant enthalpy value parameter and the refrigerant mass flow of the air suction loop of the compressor; calculating according to the refrigerant mass flow of the air-supplying enthalpy-increasing loop, the refrigerant mass flow of the compressor air suction loop, the refrigerant enthalpy value parameter of the compressor and the first refrigerant enthalpy value to obtain the air conditioner heating capacity of the current preset period; and controlling the opening of the air adding enthalpy valve according to the air conditioning heating amount of the current preset period. The opening of the air-supplying enthalpy-increasing valve is adjusted according to the heating capacity, the heating capacity can be directly taken as a control target, the opening of the air-supplying enthalpy-increasing valve can be adjusted in time, and the method is more accurate and quicker.
Drawings
Fig. 1 is a schematic diagram of a hardware structure of an air conditioner according to an embodiment of the present invention;
FIG. 2 is a schematic flow chart illustrating a control method of an air conditioner according to a first embodiment of the present invention;
fig. 3 is a schematic diagram of a heat exchange circuit of the air conditioner of the present invention.
The reference numbers illustrate:
1 indoor heat exchanger 2 Electronic expansion valve of indoor unit
3 Pressure sensor 4 Temperature sensor
5 Air-supplying enthalpy-increasing expansion valve 6 Plate heat exchanger
7 Temperature sensor 8 Outdoor electronic expansion valve
9 Outdoor heat exchanger 10 Four-way valve
11 Temperature sensor 12 Pressure sensor
13 Gas-liquid separator 14 Temperature sensor
15 Compressor 16 Temperature sensor
17 Pressure sensor
Detailed Description
Referring to fig. 1, fig. 1 is a schematic diagram of a hardware structure of an air conditioner according to the present invention. The air conditioner may include components such as a communication module 10, a memory 20, and a processor 30 in a hardware structure. In the air conditioner, the processor 30 is connected to the memory 20 and the communication module 10, respectively, the memory 20 stores thereon a computer program, which is executed by the processor 30 at the same time, and when executed, implements the steps of the method embodiments described below.
The communication module 10 may be connected to an external communication device through a network. The communication module 10 may receive a request from an external communication device, and may also send a request, an instruction, and information to the external communication device. The external communication device may be a user terminal or other system server, etc.
The memory 20 may be used to store software programs as well as various data. The memory 20 may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required by at least one function (for example, obtaining the color coordinates and the target color coordinates corresponding to the authentication request), and the like; the storage data area may include a database, and the storage data area may store data or information created according to the use of the air conditioner, and the like. Further, the memory 20 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device.
The processor 30, which is a control center of the air conditioner, connects various parts of the entire air conditioner using various interfaces and lines, and performs various functions of the air conditioner and processes data by operating or executing software programs and/or modules stored in the memory 20 and calling data stored in the memory 20, thereby integrally monitoring the air conditioner. Processor 30 may include one or more processing units; alternatively, the processor 30 may integrate an application processor, which primarily handles operating systems, user interfaces, applications, etc., and a modem processor, which primarily handles wireless communications. It will be appreciated that the modem processor described above may not be integrated into the processor 30.
The air conditioner further comprises an indoor heat exchanger, an outdoor heat exchanger, a compressor and a heat exchange loop, wherein the heat exchange loop comprises a main loop communicated with the indoor heat exchanger, the outdoor heat exchanger and the compressor and an air-supplying and enthalpy-increasing loop communicated with the main loop and the compressor. Specifically, the inlet end of the air-supplying enthalpy-increasing loop is connected to the main loops of the indoor heat exchanger and the outdoor heat exchanger, and the outlet end of the air-supplying enthalpy-increasing loop is connected to the compressor.
The air conditioner also comprises a four-way valve 10 communicated with the outdoor heat exchanger 9, the indoor heat exchanger 1, the inlet of the compressor 15 and the outlet of the compressor 15, and the flow direction of the refrigerant in the heat exchange loop can be switched through the four-way valve 10, so that the indoor heat exchanger can realize the refrigeration or heating function.
In the embodiment shown in fig. 3, the air conditioner further includes an auxiliary heat exchanger disposed on the main loop between the indoor heat exchanger 1 and the outdoor heat exchanger 9, and an air-supplying enthalpy-increasing electronic valve 5 disposed on the air-supplying enthalpy-increasing loop, where the air-supplying enthalpy-increasing loop includes a first connection section, a heat exchange section, and a second connection section that are sequentially communicated, the air-supplying enthalpy-increasing electronic valve 5 is disposed on the first connection section, one end of the first connection section, which is far away from the heat exchange section, is connected to the main loop, and the heat exchange section and the auxiliary heat exchanger are disposed in parallel at one position to realize auxiliary heat exchange; the end of the second connecting section remote from the heat exchange section is connected to a compressor 15.
In this embodiment, a plurality of pressure sensors are further provided, which are respectively a pressure sensor 3 disposed on the main loop connecting the indoor heat exchanger and the inlet end of the vapor-supplementing enthalpy-increasing loop, a pressure sensor 12 disposed on the main loop at the inlet of the compressor, and a pressure sensor 17 disposed on the main loop at the outlet of the compressor 15. The air conditioner also comprises a plurality of temperature sensors, namely a temperature sensor 4 arranged on a main loop for communicating the indoor heat exchanger 1 with the inlet end of the air-supplementing enthalpy-increasing loop, a temperature sensor 7 arranged on the main loop at the inlet of the outdoor heat exchanger 9, a temperature sensor 11 arranged on the main loop at the inlet of the compressor 15, a temperature sensor 14 arranged on the second connecting section and a temperature sensor 16 arranged on the main loop at the outlet of the compressor 15.
Although not shown in fig. 1, the air conditioner may further include a circuit control module for connecting to a power supply to ensure the normal operation of other components. Those skilled in the art will appreciate that the air conditioner configuration shown in fig. 1 is not intended to be limiting of the air conditioner and may include more or fewer components than shown, or some components may be combined, or a different arrangement of components.
Based on the hardware structure, various embodiments of the method of the invention are provided.
Referring to fig. 2, fig. 2 is a schematic flow chart of a control method of an air conditioner according to a first embodiment of the present invention, in which the method includes:
step S10, acquiring refrigerant pressure information and refrigerant temperature information of a preset position in the heat exchange loop and compressor parameters;
step S20, calculating the refrigerant mass flow of the compressor suction loop according to the compressor parameters;
step S30, determining a compressor refrigerant enthalpy value parameter, a first refrigerant enthalpy value at an inlet of an outdoor unit heat exchanger, and an enthalpy-increasing refrigerant enthalpy value parameter of an air-supply enthalpy-increasing loop according to the refrigerant pressure information and the refrigerant temperature information;
in this embodiment, refrigerant pressure information may be acquired by a pressure sensor, refrigerant temperature information may be acquired by a temperature sensor, and compressor parameters may be acquired, where the compressor parameters include a preset compressor flow coefficient, a current compressor operating frequency, and a preset compressor volume. In this embodiment, the refrigerant mass flow rate of the suction loop of the compressor can be further calculated by obtaining the compressor parameters, and the refrigerant enthalpy value parameter of the compressor is further determined according to the refrigerant pressure information and the refrigerant temperature information, wherein the refrigerant enthalpy value parameter of the compressor includes the refrigerant enthalpy value of the exhaust port of the compressor and the refrigerant enthalpy value of the suction port of the compressor, please refer to fig. 3, and the refrigerant enthalpy value of the exhaust port of the compressor is determined by the temperature sensor 16 and the pressure sensor 17. The enthalpy value of the first refrigerant at the inlet of the outdoor heat exchanger can be determined according to the refrigerant pressure information and the refrigerant temperature information, namely the enthalpy value of the first refrigerant at the inlet of the outdoor heat exchanger is determined according to the pressure sensor 3 and the temperature sensor 7. The enthalpy value parameter of the enthalpy-increasing refrigerant comprises a second refrigerant enthalpy value close to the inlet of the compressor in the vapor-supplying enthalpy-increasing loop and a third refrigerant enthalpy value at the inlet of the vapor-supplying enthalpy-increasing valve, and the second refrigerant enthalpy value close to the inlet of the compressor in the vapor-supplying enthalpy-increasing loop can be determined according to the pressure information and the temperature information of the refrigerant, namely the second refrigerant enthalpy value close to the inlet of the compressor in the vapor-supplying enthalpy-increasing loop is determined according to the pressure sensor 17, the pressure sensor 12 and the temperature sensor 14. And determining a third refrigerant enthalpy value at the inlet of the air-replenishing enthalpy-increasing valve according to the refrigerant pressure information and the refrigerant temperature information, namely determining the third refrigerant enthalpy value at the inlet of the air-replenishing enthalpy-increasing valve according to the pressure sensor 3 and the temperature sensor 4.
Step S40, calculating according to the enthalpy parameter of the compressor refrigerant, the enthalpy value of the first refrigerant, the enthalpy parameter of the enthalpy-increasing refrigerant and the refrigerant mass flow of the compressor suction loop to obtain the refrigerant mass flow of the air-supplementing enthalpy-increasing loop;
step S50, calculating according to the refrigerant mass flow of the air-supplying enthalpy-increasing loop, the refrigerant mass flow of the compressor air suction loop, the refrigerant enthalpy value parameter of the compressor and the first refrigerant enthalpy value to obtain the air conditioner heating capacity of the current preset period;
in this embodiment, the amount of cooling medium in the vapor-supplying enthalpy increasing circuit can be obtained by calculating according to the enthalpy parameter of the refrigerant of the compressor, the enthalpy value of the first refrigerant, the enthalpy parameter of the enthalpy increasing refrigerant and the mass flow rate of the refrigerant in the vapor-supplying enthalpy circuit, and the heating capacity of the air conditioner in the current preset period can be obtained by calculating according to the mass flow rate of the refrigerant in the vapor-supplying enthalpy increasing circuit, the mass flow rate of the refrigerant in the vapor-supplying circuit of the compressor, the enthalpy parameter of the refrigerant of the compressor and the enthalpy value of the first refrigerant.
And step S60, controlling the opening of the air enthalpy increasing valve according to the air-conditioning heating capacity of the current preset period.
According to the air conditioner heating amount adjusting device in the embodiment, the air supplementing and enthalpy increasing valve opening degree, namely the air supplementing and enthalpy increasing valve 5 in fig. 3, is adjusted according to the air conditioner heating amount of the current preset period, the air supplementing and enthalpy increasing valve opening degree is increased or reduced, the air supplementing amount is relatively large when the valve opening degree is large, the heating amount can be reduced, the air supplementing amount is relatively small when the valve opening degree is small, the heating amount can be increased, and the valve opening degree and the heating amount are in positive correlation. The opening of the air-supplying and air-supplying enthalpy-increasing valve is adjusted according to the temperature difference value of the inlet and the outlet of the heat exchanger in the prior art, certain lag exists in the opening of the air-supplying and air-supplying enthalpy-increasing valve according to temperature adjustment, the opening of the air-supplying enthalpy-increasing valve cannot be adjusted in time, the opening of the air-supplying enthalpy-increasing valve is adjusted according to the heating capacity in the embodiment, the heating capacity can be directly used as a control target, the opening of the air-supplying enthalpy-increasing valve can be adjusted in time, and the method is more accurate and rapid.
Further, a second embodiment of the air conditioner control method of the present invention is proposed based on the first embodiment of the air conditioner control method of the present invention, and in this embodiment, the step S20 includes:
step S21, determining the specific volume of the refrigerant at the air suction port of the compressor according to the pressure of the refrigerant at the air suction port of the compressor and the temperature of the refrigerant at the air suction port of the compressor;
and step S22, calculating the mass flow of the refrigerant in the air suction loop of the compressor according to the parameters of the compressor and the specific volume of the refrigerant at the air suction port of the compressor.
In this embodiment, the refrigerant pressure information includes a refrigerant pressure at the air suction port of the compressor, the refrigerant temperature information includes a refrigerant temperature at the air suction port of the compressor, and a specific volume of the refrigerant at the air suction port of the compressor is determined according to the refrigerant pressure at the air suction port of the compressor and the refrigerant temperature at the air suction port of the compressor, referring to fig. 3, and the specific volume of the refrigerant at the air suction port of the compressor is determined according to the temperature sensor 11 and the pressure sensor 12. And calculating the mass flow of the refrigerant of the compressor suction loop according to the parameters of the compressor and the specific volume of the refrigerant at the suction port of the compressor, wherein the parameters of the compressor comprise a preset compressor flow coefficient, the current compressor running frequency and a preset compressor volume. The air-conditioning heating capacity is obtained by further calculating the refrigerant mass flow of the air-conditioning enthalpy-increasing loop, so that the opening degree of the air-conditioning enthalpy-increasing valve is adjusted according to the air-conditioning heating capacity, the opening degree of the air-conditioning enthalpy-increasing valve is adjusted according to the heating capacity, the heating capacity can be directly used as a control target, the opening degree of the air-conditioning enthalpy-increasing valve can be timely adjusted, and the air-conditioning enthalpy-increasing loop is more accurate and rapid.
Further, step S22 includes:
step S220, substituting the compressor parameters and the specific volume of the refrigerant at the air suction port of the compressor into a first preset formula to calculate the mass flow of the refrigerant in the air suction loop of the compressor, wherein the compressor parameters comprise a preset compressor flow coefficient, the current compressor running frequency and a preset compressor volume, and the first preset formula comprises the following steps:
Gm＝v×λ×f×P,
wherein G ismThe mass flow of the refrigerant of the air suction loop of the compressor, v is the specific volume of the refrigerant at the air suction port of the compressor, lambda is the flow coefficient of the compressor, f is the running frequency of the compressor, and P is the volume of the compressor.
Substituting compressor parameter, compressor suction opening department refrigerant specific volume into the formula can obtain the refrigerant mass flow that the compressor breathed in the return circuit in this embodiment, further calculation obtains the air conditioner heating capacity to adjust the aperture that the tonifying qi increases the enthalpy valve according to the air conditioner heating capacity, adjust tonifying qi according to the heating capacity and increase the enthalpy valve aperture, can directly use the heating capacity as control target, can in time adjust the aperture that the tonifying qi increases the enthalpy valve, and is more accurate swift.
Further, a third embodiment of the air conditioner control method of the present invention is proposed based on the first embodiment of the air conditioner control method of the present invention, and in this embodiment, step S40 includes:
step S41, substituting the refrigerant enthalpy value of the air suction port of the compressor, the enthalpy value of the first refrigerant, the refrigerant enthalpy value of the compressor inlet in the air-supply enthalpy-increasing loop, the refrigerant enthalpy value of the air-supply enthalpy-increasing valve inlet and the refrigerant mass flow of the air suction loop of the compressor into a second preset formula to calculate the refrigerant mass flow of the air-supply enthalpy-increasing loop, wherein the second preset formula is as follows:
Figure BDA0002806776950000091
wherein G is1Refrigerant mass flow, G, for the vapor-filling enthalpy-increasing circuitmIs the refrigerant mass flow h of the suction loop of the compressor5Is the enthalpy value of the third refrigerant, h3Is the enthalpy value of the second refrigerant, h4Is the enthalpy value, h, of the refrigerant at the air suction port of the compressor2Is the enthalpy value of the first refrigerant.
The enthalpy value parameters of the enthalpy-increasing refrigerant in the embodiment comprise a second refrigerant enthalpy value close to an inlet of a compressor in the enthalpy-increasing vapor injection circuit and a third refrigerant enthalpy value at an inlet of an enthalpy-increasing vapor injection valve, the refrigerant enthalpy value of an air suction port of the compressor, the first refrigerant enthalpy value, the second refrigerant enthalpy value, the third refrigerant enthalpy value and the refrigerant mass flow of the air suction circuit of the compressor are substituted into a formula to calculate to obtain the refrigerant mass flow of the enthalpy-increasing vapor injection circuit, and the air-conditioning heating quantity is further calculated to obtain the air-conditioning heating quantity.
Further, a fourth embodiment of the air conditioner control method of the present invention is proposed based on the first embodiment of the air conditioner control method of the present invention, and in this embodiment, the step S50 includes:
step S51, substituting the refrigerant mass flow of the air-filling enthalpy-increasing loop, the refrigerant mass flow of the compressor air suction loop, the compressor air outlet refrigerant enthalpy value and the first refrigerant enthalpy value in the compressor refrigerant enthalpy value parameter into a third preset formula to calculate the air conditioner heating capacity of the current preset period, wherein the third preset formula is as follows:
Q＝(G1+Gm)×(h1-h2)，
wherein Q is the heating capacity of the air conditioner in the current preset period, G1Refrigerant mass flow, G, for the vapor-filling enthalpy-increasing circuitmIs the refrigerant mass flow h of the suction loop of the compressor1Is the enthalpy value h of the refrigerant at the exhaust port of the compressor2Is the enthalpy value of the first refrigerant.
In this embodiment, the refrigerant mass flow of the air-supplying enthalpy-increasing loop, the refrigerant mass flow of the air-sucking loop of the compressor, the refrigerant enthalpy value of the air outlet of the compressor and the enthalpy value of the first refrigerant are substituted into the formula to obtain the air-conditioning heating capacity of the current preset period, wherein the preset period can be set according to actual working conditions, for example, 40s is a period, the opening degree of the air-supplying enthalpy-increasing valve is adjusted according to the air-conditioning heating capacity, the opening degree of the air-supplying enthalpy-increasing valve is adjusted according to the heating capacity, the heating capacity can be directly used as a control target, the opening degree of the air-supplying enthalpy-increasing valve can be timely adjusted, and the air-supplying enthalpy-increasing valve is more accurate and faster.
Further, a fifth embodiment of the air conditioner control method of the present invention is proposed based on the first embodiment of the air conditioner control method of the present invention, and in this embodiment, the step S60 includes:
step S61, acquiring the air conditioner heating capacity of the previous preset period, and comparing the air conditioner heating capacity of the current preset period with the air conditioner heating capacity of the previous preset period;
and step S62, adjusting the opening of the air-filling enthalpy-increasing valve according to the comparison result.
In this embodiment, the heating capacity of the air conditioner in the previous preset period is obtained, the calculated heating capacity of the air conditioner in the current preset period is compared with the heating capacity of the air conditioner in the previous preset period, and the opening of the air-supply enthalpy-increasing valve is further adjusted according to the comparison result, wherein the air-supply enthalpy-increasing valve may be an air-supply enthalpy-increasing electronic expansion valve. The opening of the air-supplying enthalpy-increasing valve is adjusted according to the heating capacity of the air conditioner, the opening of the air-supplying enthalpy-increasing valve is adjusted according to the heating capacity, the heating capacity can be directly used as a control target, the opening of the air-supplying enthalpy-increasing valve can be adjusted in time, and the air-supplying enthalpy-increasing valve is more accurate and rapid.
Further, step S62 includes:
step S620, if the air-conditioning heating capacity of the current preset period is larger than that of the previous preset period, increasing the opening of the air-supplying enthalpy-increasing valve to a first preset opening;
in step S621, if the air-conditioning heating capacity of the current preset period is smaller than the air-conditioning heating capacity of the previous preset period, the opening of the air-supply enthalpy-increasing valve is decreased to a second preset opening.
In this embodiment, if the heating capacity of the air conditioner in the current preset period is greater than the previous preset period, it is described that the heating capacity of the air conditioner is too large, the opening of the air-supply enthalpy-increasing valve is increased to the first preset opening, and the air-supply quantity is relatively large when the opening of the valve is large, so that the heating capacity is reduced. If the air conditioner heating quantity of the current preset period is smaller than or equal to the last preset period, the current air conditioner heating quantity is over small, the opening degree of the air-supplying enthalpy-increasing valve is reduced to the second preset opening degree, the air-supplying quantity is relatively small when the opening degree of the valve is smaller, and the heating quantity is increased. In the embodiment, the opening degree of the air-supplying enthalpy-increasing valve is adjusted according to the heating capacity, the heating capacity can be directly used as a control target, the opening degree of the air-supplying enthalpy-increasing valve can be adjusted in time, and the method is more accurate and quicker.
Further, a fifth embodiment of the air conditioner control method of the present invention is proposed based on the first embodiment of the air conditioner control method of the present invention, and in this embodiment, the step S10 includes:
step S100, after the heating mode is started, refrigerant pressure information and refrigerant temperature information of a preset position in a heat exchange loop and compressor parameters are obtained at intervals of preset time.
In this embodiment, after the heating mode is started, refrigerant pressure information and refrigerant temperature information at preset positions in the heat exchange loop are acquired at intervals of preset time, as shown in fig. 3, the heat exchange loop includes a plurality of pressure sensors and a plurality of temperature sensors, the refrigerant pressure information can be acquired through the pressure sensors, the refrigerant temperature information can be acquired through the temperature sensors, and the preset time is set according to actual working conditions, for example, the preset time can be set to 40s, that is, the time of one cycle. The compressor parameters comprise a preset compressor flow coefficient, the current compressor running frequency and a preset compressor volume, and the compressor running frequency is variable, so that the compressor parameters are acquired at intervals of preset time. The heating quantity of the air conditioner is further calculated, the heating quantity can be directly taken as a control target in the embodiment, the opening degree of the air-supplying enthalpy-increasing valve can be adjusted in time, and the air-supplying enthalpy-increasing valve is more accurate and faster.
The invention also proposes a computer-readable storage medium on which a computer program is stored. The computer-readable storage medium may be a Memory in the air conditioner of fig. 1, and may also be at least one of a ROM (Read-Only Memory)/RAM (Random Access Memory), a magnetic disk, and an optical disk, and the computer-readable storage medium includes instructions for enabling an air conditioner (which may be a mobile phone, a computer, a server, a terminal, or a network device) having a processor to execute the method according to the embodiments of the present invention.
In the present invention, the terms "first", "second", "third", "fourth" and "fifth" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance, and it is obvious to those skilled in the art that the above-mentioned terms have specific meanings in the present invention according to specific situations.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean 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 invention. In this specification, the schematic representations of the terms used above are not necessarily intended to 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. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although the embodiment of the present invention has been shown and described, the scope of the present invention is not limited thereto, it should be understood that the above embodiment is illustrative and not to be construed as limiting the present invention, and that those skilled in the art can make changes, modifications and substitutions to the above embodiment within the scope of the present invention, and that these changes, modifications and substitutions should be covered by the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (10)

1. An air conditioner control method, characterized in that the method comprises the steps of:
acquiring refrigerant pressure information and refrigerant temperature information of a preset position in a heat exchange loop and compressor parameters;
calculating to obtain the refrigerant mass flow of the compressor air suction loop according to the compressor parameters;
determining a compressor refrigerant enthalpy value parameter, a first refrigerant enthalpy value at an inlet of an outdoor unit heat exchanger and an enthalpy-increasing refrigerant enthalpy value parameter of an air-supplying enthalpy-increasing loop according to the refrigerant pressure information and the refrigerant temperature information;
calculating to obtain the refrigerant mass flow of the air-supplying enthalpy-increasing loop according to the refrigerant enthalpy value parameter of the compressor, the enthalpy value of the first refrigerant, the enthalpy-increasing refrigerant enthalpy value parameter and the refrigerant mass flow of the air suction loop of the compressor;
calculating according to the refrigerant mass flow of the air-supplying enthalpy-increasing loop, the refrigerant mass flow of the compressor air suction loop, the refrigerant enthalpy value parameter of the compressor and the first refrigerant enthalpy value to obtain the air conditioner heating capacity of the current preset period;
and controlling the opening of the air adding enthalpy valve according to the air conditioning heating amount of the current preset period.
2. The air conditioner control method as claimed in claim 1, wherein the refrigerant pressure information includes a refrigerant pressure at a compressor suction port, and the refrigerant temperature information includes a refrigerant temperature at the compressor suction port; the step of calculating the refrigerant mass flow of the compressor suction loop according to the compressor parameters comprises the following steps:
determining the specific volume of the refrigerant at the air suction port of the compressor according to the pressure of the refrigerant at the air suction port of the compressor and the temperature of the refrigerant at the air suction port of the compressor;
and calculating the mass flow of the refrigerant of the air suction loop of the compressor according to the parameters of the compressor and the specific volume of the refrigerant at the air suction port of the compressor.
3. The method as claimed in claim 2, wherein the step of calculating the mass flow rate of the refrigerant in the suction loop of the compressor according to the parameters of the compressor and the specific volume of the refrigerant at the suction port of the compressor comprises:
substituting the compressor parameter and the specific volume of the refrigerant at the air suction port of the compressor into a first preset formula to calculate the mass flow of the refrigerant in the air suction loop of the compressor, wherein the compressor parameter comprises a preset compressor flow coefficient, the current compressor running frequency and a preset compressor volume, and the first preset formula comprises the following components:
Gm＝v×λ×f×P,
wherein G ismThe mass flow of the refrigerant of the air suction loop of the compressor, v is the specific volume of the refrigerant at the air suction port of the compressor, lambda is the flow coefficient of the compressor, f is the running frequency of the compressor, and P is the volume of the compressor.
4. The air conditioner controlling method as claimed in claim 1, wherein the enthalpy-increasing refrigerant enthalpy value parameter includes a second refrigerant enthalpy value near the compressor inlet and a third refrigerant enthalpy value at the vapor-filling enthalpy-increasing valve inlet in the vapor-filling enthalpy-increasing circuit; the step of calculating the refrigerant mass flow of the vapor-filling enthalpy-increasing loop according to the refrigerant enthalpy value parameter of the compressor, the enthalpy value of the first refrigerant, the enthalpy-increasing refrigerant enthalpy value parameter of the vapor-filling enthalpy-increasing loop and the refrigerant mass flow of the suction loop of the compressor comprises the following steps:
substituting the refrigerant enthalpy value of a compressor air suction port in the refrigerant enthalpy value parameter of the compressor, the first refrigerant enthalpy value, the refrigerant enthalpy value of a compressor inlet in an air-supply enthalpy-increasing loop, the refrigerant enthalpy value of an air-supply enthalpy-increasing valve inlet and the refrigerant mass flow of the compressor air suction loop into a second preset formula to calculate the refrigerant mass flow of the air-supply enthalpy-increasing loop, wherein the second preset formula is as follows:
Figure FDA0002806776940000021
wherein G is1Refrigerant mass flow, G, for the vapor-filling enthalpy-increasing circuitmIs the refrigerant mass flow h of the suction loop of the compressor5Is the enthalpy value of the third refrigerant, h3Is the enthalpy value of the second refrigerant, h4Is the enthalpy value, h, of the refrigerant at the air suction port of the compressor2Is the enthalpy value of the first refrigerant.
5. The method as claimed in claim 1, wherein the step of calculating the heating capacity of the air conditioner in the current preset period according to the refrigerant mass flow rate of the vapor-filling enthalpy-increasing circuit, the refrigerant mass flow rate of the compressor suction circuit, the refrigerant enthalpy parameter of the compressor and the first refrigerant enthalpy value comprises:
substituting the refrigerant mass flow of the air-supplying enthalpy-increasing loop, the refrigerant mass flow of the compressor air suction loop, the refrigerant enthalpy value of the compressor air outlet in the refrigerant enthalpy value parameter of the compressor and the enthalpy value of the first refrigerant into a third preset formula to calculate the air conditioner heating capacity of the current preset period, wherein the third preset formula is as follows:
Q＝(G1+Gm)×(h1-h2)，
wherein Q is the heating capacity of the air conditioner in the current preset period, G1Refrigerant mass flow, G, for the vapor-make-up enthalpy circuitmIs the refrigerant mass flow h of the suction loop of the compressor1Is the enthalpy value h of the refrigerant at the exhaust port of the compressor2Is the enthalpy value of the first refrigerant.
6. The air conditioner controlling method as claimed in claim 1, wherein the step of controlling the opening degree of the air enthalpy increasing valve according to the current preset period of the air-conditioning heating capacity comprises:
acquiring the heating capacity of the air conditioner in the previous preset period, and comparing the heating capacity of the air conditioner in the current preset period with the heating capacity of the air conditioner in the previous preset period;
and adjusting the opening of the air-supplementing enthalpy-increasing valve according to the comparison result.
7. The control method of an air conditioner according to claim 6, wherein the step of adjusting the opening of the air-supply enthalpy-increasing valve according to the comparison result includes:
if the air-conditioning heating capacity of the current preset period is larger than that of the last preset period, increasing the opening of the air-supply enthalpy-increasing valve to a first preset opening;
and if the air-conditioning heating capacity of the current preset period is smaller than that of the last preset period, reducing the opening of the air-supply enthalpy-increasing valve to a second preset opening.
8. The method as claimed in claim 1, wherein the step of obtaining the refrigerant pressure information and the refrigerant temperature information of the preset position in the heat exchange loop and the compressor parameter comprises:
after the heating mode is started, refrigerant pressure information and refrigerant temperature information of preset positions in the heat exchange loop and compressor parameters are acquired at preset time intervals.
9. An air conditioner comprising an indoor heat exchanger, an outdoor heat exchanger, a compressor, a heat exchange circuit including a main circuit communicating the indoor heat exchanger, the outdoor heat exchanger and the compressor and an enthalpy-increasing air-make-up circuit communicating the main circuit and the compressor, a memory, a processor, and a computer program stored on the memory and executable on the processor, wherein the computer program when executed by the processor implements the steps of the air conditioner control method according to any one of claims 1 to 8.
10. A readable storage medium, characterized in that the readable storage medium has stored thereon a computer program which, when executed by a processor, implements the steps of the air conditioner control method according to any one of claims 1 to 8.
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