CN111473496B - Air conditioning system, control method and device thereof and storage medium - Google Patents
Air conditioning system, control method and device thereof and storage medium Download PDFInfo
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- CN111473496B CN111473496B CN202010356423.2A CN202010356423A CN111473496B CN 111473496 B CN111473496 B CN 111473496B CN 202010356423 A CN202010356423 A CN 202010356423A CN 111473496 B CN111473496 B CN 111473496B
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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
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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
- F24F11/64—Electronic processing using pre-stored data
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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
- F24F11/88—Electrical aspects, e.g. circuits
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- 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
- F25B41/00—Fluid-circulation arrangements
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- 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
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/31—Expansion valves
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- 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
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- 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 provides an air conditioning system, a control method and a device thereof, and storage media, wherein a refrigerant inlet of each indoor unit is provided with a first electronic expansion valve, an outdoor unit comprises an outdoor heat exchanger and a first compressor, the first compressor is used for compressing a first refrigerant medium, a hydraulic module second compressor is used for compressing a second refrigerant medium, an outlet of the outdoor heat exchanger is connected with an inlet of the first refrigerant medium of the first heat exchanger, and the control method comprises the following steps: identifying the main refrigeration operation of the air conditioning system, and taking the indoor unit in the heating operation as a candidate indoor unit; detecting the condensation temperature of the candidate indoor unit, and acquiring the candidate indoor unit with insufficient heating capacity according to the condensation temperature; taking a candidate indoor unit with insufficient heating capacity as a target indoor unit, and performing heating protection on the target indoor unit; and controlling the second compressor to reduce to a preset frequency and controlling the second electronic expansion valve to reduce to a preset opening degree, so as to ensure the heating quantity of the heating inner machine.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to an air conditioning system, a control method and device thereof and a storage medium.
Background
Compared with the traditional heat pump system, the three-pipe heating recovery system can realize that indoor units in the same system can simultaneously refrigerate and heat without mode conflict. However, the related art has a problem that in the main cooling mode, the hydraulic module and the heating inner unit are also used as a condenser, so that the refrigerant distribution is not reasonable, and the effect of the heating inner unit is not good.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art.
To this end, a first object of the present invention is to propose a control of an air conditioning system to ensure the heating capacity of a heating internal unit.
A second object of the present invention is to provide a control device for an air conditioning system.
A third object of the present invention is to provide an air conditioning system.
A fourth object of the invention is to propose a readable storage medium.
In order to achieve the above object, a first aspect of the present invention provides a control method for an air conditioning system, where the air conditioning system includes an outdoor unit, at least one indoor unit, and at least one hydraulic module, a refrigerant inlet of each indoor unit is provided with a first electronic expansion valve, the outdoor unit includes an outdoor heat exchanger and a first compressor, the first compressor is used to compress a first refrigerant medium, the hydraulic module includes a first heat exchanger, a second heat exchanger, and a second compressor, the second compressor is disposed between the first heat exchanger and the second heat exchanger and is used to compress a second refrigerant medium, an outlet of the outdoor heat exchanger is connected to an inlet of the first refrigerant medium of the first heat exchanger, an outlet of the first refrigerant medium of the first heat exchanger is connected to a refrigerant inlet of the indoor unit, and the first refrigerant medium and the second refrigerant medium exchange heat in the first heat exchanger, the second refrigerant medium outlet of the first heat exchanger is connected with the return air inlet of the second compressor, the exhaust port of the second compressor is connected with the second refrigerant medium inlet of the second heat exchanger, and the second refrigerant medium outlet of the second heat exchanger is connected with the second refrigerant medium inlet of the first heat exchanger through a second electronic expansion valve, wherein the control method comprises the following steps: identifying the main refrigeration operation of the air conditioning system, and taking an indoor unit in heating operation as a candidate indoor unit; detecting the condensation temperature of the candidate indoor unit, and acquiring the candidate indoor unit with insufficient heating capacity according to the condensation temperature; taking the candidate indoor unit with insufficient heating capacity as a target indoor unit, and performing heating protection on the target indoor unit; and controlling the second compressor to reduce to a preset frequency and controlling the second electronic expansion valve to reduce to a preset opening degree.
According to an embodiment of the present application, the detecting a condensation temperature of the candidate indoor unit, and obtaining the candidate indoor unit with insufficient heating capacity according to the condensation temperature includes: and identifying that the condensation temperature is lower than a first preset condensation temperature, and determining that the heating capacity of the candidate indoor unit is insufficient.
According to an embodiment of the present application, the detecting a condensation temperature of the candidate indoor unit, and obtaining the candidate indoor unit with insufficient heating capacity according to the condensation temperature includes: and acquiring the supercooling degree of the candidate indoor unit according to the condensation temperature, identifying that the supercooling degree is greater than a first preset supercooling degree, and determining that the heating capacity of the candidate indoor unit is insufficient.
According to an embodiment of the present application, the controlling the second compressor to decrease to a preset frequency and the second electronic expansion valve to decrease to a preset opening degree includes: controlling the frequency of the second compressor to be reduced to a first preset frequency, and controlling the opening degree of the second electronic expansion valve to be reduced to a first preset opening degree; and controlling the second compressor to operate for a preset time according to the first preset frequency.
According to an embodiment of the present application, further comprising: recognizing that the supercooling degree is greater than a second preset supercooling degree, wherein the second preset supercooling degree is smaller than the first preset supercooling degree; and controlling the second compressor to shut down and controlling the second electronic expansion valve to close.
According to an embodiment of the present application, further comprising: identifying that the supercooling degree is smaller than a third preset supercooling degree, wherein the third preset supercooling degree is smaller than the second preset supercooling degree; and controlling to stop the heating capacity protection of the target indoor unit.
According to an embodiment of the present application, further comprising: and controlling the opening degree of a first electronic expansion valve of the target indoor unit to be maximum, and controlling the first compressor to increase the running frequency.
This application can reduce through the frequency reduction to the second compressor and the aperture of control second electronic expansion valve, come to heat the protection to the indoor set that heating capacity is not enough to effectively ensure the heating capacity of the indoor set that heats under the cooling mode, promote user's experience.
In order to achieve the above object, a second aspect of the present invention provides a control device for an air conditioning system, where the air conditioning system includes an outdoor unit, at least one indoor unit, and at least one hydraulic module, a refrigerant inlet of each indoor unit is provided with a first electronic expansion valve, the outdoor unit includes an outdoor heat exchanger and a first compressor, the first compressor is used to compress a first refrigerant medium, the hydraulic module includes a first heat exchanger, a second heat exchanger, and a second compressor, the second compressor is disposed between the first heat exchanger and the second heat exchanger and is used to compress a second refrigerant medium, an outlet of the outdoor heat exchanger is connected to an inlet of the first refrigerant medium of the first heat exchanger, an outlet of the first refrigerant medium of the first heat exchanger is connected to a refrigerant inlet of the indoor unit, and the first refrigerant medium and the second refrigerant medium exchange heat in the first heat exchanger, the second refrigerant medium outlet of the first heat exchanger is connected with the return air inlet of the second compressor, the exhaust port of the second compressor is connected with the second refrigerant medium inlet of the second heat exchanger, and the second refrigerant medium outlet of the second heat exchanger is connected with the second refrigerant medium inlet of the first heat exchanger through a second electronic expansion valve, wherein the control device comprises the following steps: the acquisition module is used for identifying the main refrigeration operation of the air conditioning system and taking the indoor unit in the heating operation as a candidate indoor unit; detecting the condensation temperature of the candidate indoor unit, and acquiring the candidate indoor unit with insufficient heating capacity according to the condensation temperature; the control module is used for taking the candidate indoor unit with insufficient heating capacity as a target indoor unit and performing heating protection on the target indoor unit; and controlling the second compressor to reduce to a preset frequency and controlling the second electronic expansion valve to reduce to a preset opening degree.
In order to achieve the above object, a third embodiment of the present invention provides an air conditioning system, including the control device of the air conditioning system.
In order to achieve the above object, a fourth aspect of the present invention provides a readable storage medium having stored thereon a computer program that, when executed by a processor, implements the control method of the air conditioning system.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The foregoing and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic structural diagram of an air conditioning system according to an embodiment of the present invention;
fig. 2 is a flowchart of a control method of an air conditioning system according to an embodiment of the present invention;
fig. 3 is a flowchart of a control method of an air conditioning system according to an embodiment of the present invention;
fig. 4 is a flowchart of a control method of an air conditioning system according to another embodiment of the present invention;
FIG. 5 is a flow chart of a method for controlling an air conditioning system according to an embodiment of the present invention;
fig. 6 is a block diagram schematically illustrating a control apparatus of an air conditioning system according to an embodiment of the present invention;
fig. 7 is a block diagram of an air conditioning system according to an embodiment of the present invention.
Reference numerals:
the system comprises an outdoor unit 1, a refrigerant switching device 2, an indoor unit 3, a first electronic expansion valve 31, a first compressor 11, an oil separator 12, a four-way valve 13, an outdoor heat exchanger 14, a throttling device 15, a subcooler 17, a subcooler auxiliary path throttling device 18 and a gas-liquid separator 19;
the hydraulic module 4, the second compressor 41, the first heat exchanger 44, the second electronic expansion valve 43, the second heat exchanger 42 and the evaporation heat exchanger throttling device 45;
the control device 100 of the air conditioning system comprises an acquisition module 10 and a control module 20.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
An air conditioning system, a control method and apparatus thereof, and a storage medium according to embodiments of the present invention are described below with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of an air conditioning system according to an embodiment of the present invention. As shown in fig. 1, the indoor unit of the air conditioning system according to the embodiment of the present invention can perform cooling and heating simultaneously. The air conditioning system comprises an outdoor unit 1, at least one indoor unit 3 and at least one hydraulic module 4, wherein a first electronic expansion valve 31 is arranged at a refrigerant inlet of each indoor unit, the outdoor unit 1 comprises an outdoor heat exchanger 14 and a first compressor 11, the first compressor 11 is used for compressing a first refrigerant medium, the hydraulic module 4 comprises a first heat exchanger 44, a second heat exchanger 42 and a second compressor 41, and the second compressor 41 is arranged between the first heat exchanger 44 and the second heat exchanger 42 and used for compressing a second refrigerant medium; the outlet of the outdoor heat exchanger 14 is connected to the inlet of the first refrigerant medium of the first heat exchanger 44, the outlet of the first refrigerant medium of the first heat exchanger 44 is connected to the inlet of the indoor unit 3, the first refrigerant medium and the second refrigerant medium exchange heat in the first heat exchanger 44, the second refrigerant medium outlet of the first heat exchanger 44 is connected to the return port of the second compressor 41, the exhaust port of the second compressor 41 is connected to the inlet of the second refrigerant medium of the second heat exchanger 42, and the second refrigerant medium outlet of the second heat exchanger 42 is connected to the inlet of the second refrigerant medium of the first heat exchanger 44 through the second electronic expansion valve 43.
When the air conditioning system is in main refrigeration operation, the outdoor heat exchanger 14 serves as a condenser, the first refrigerant medium is compressed into high-temperature high-pressure gas in the first compressor 11, the high-temperature high-pressure gas enters the oil separator 12 to separate oil and refrigerant, the separated oil returns to the vapor-liquid separator 19, and the high-temperature high-pressure gaseous refrigerant is divided into two parts and enters the outdoor heat exchanger 14 and the hydraulic module 4 respectively.
Specifically, a first part of high-temperature and high-pressure gaseous refrigerant enters the outdoor heat exchanger 14 through the four-way valve 13, is condensed into a high-temperature and high-pressure liquid refrigerant, then enters the radiator 16 to cool the external electric control element, and then enters the indoor unit 3 through the subcooler 17 and the refrigerant switching device 2; the second part of high-temperature and high-pressure gaseous refrigerant enters the first heat exchanger 44 of the hydraulic module to release heat and is condensed into liquid refrigerant, and the liquid refrigerant is throttled into medium-pressure liquid refrigerant by the throttle device 45 of the evaporative heat exchanger and enters the indoor unit 3 through the refrigerant switching device 2. The indoor unit 3 in the cooling mode absorbs heat to vaporize the first refrigerant medium into a low-temperature and low-pressure gaseous refrigerant, and returns the gaseous refrigerant to the first compressor 11.
The second refrigerant medium in the hydraulic module internal cycle absorbs the heat of the first refrigerant medium in the first heat exchanger 44, turns into a low-pressure gaseous refrigerant, returns to the second compressor 41 to be compressed into a high-temperature high-pressure gaseous refrigerant, then enters the second heat exchanger 42 to give off heat to water to turn into a high-pressure liquid refrigerant, and is throttled into a low-pressure two-phase refrigerant by the hydraulic module electronic expansion valve 43 to enter the first heat exchanger 44, thereby completing the second refrigerant medium cycle.
Fig. 2 is a flowchart of a control method of an air conditioning system according to an embodiment of the present invention. As shown in fig. 2, the control method of the air conditioning system according to the embodiment of the present invention includes the following steps:
s101: and identifying the main cooling operation of the air conditioning system, and taking the indoor unit in the heating operation as a candidate indoor unit.
S102: and detecting the condensation temperature of the candidate indoor unit, and acquiring the candidate indoor unit with insufficient heating capacity according to the condensation temperature.
Specifically, identifying that the condensation temperature is lower than a first preset condensation temperature, and determining that the heating capacity of the candidate indoor unit is insufficient; or acquiring the supercooling degree of the candidate indoor unit according to the condensing temperature, identifying that the supercooling degree is greater than a first preset supercooling degree, and determining that the heating capacity of the candidate indoor unit is insufficient.
That is, the heating indoor unit (indoor unit in the heating mode) functions as a condenser to release heat to the indoor to increase the indoor temperature. On the one hand, if the condensing temperature of the heating inner machine is lower, the indoor heating amount is lower, even the air supply temperature is lower than the body surface temperature of a human body, the requirement of the heating amount cannot be met, and the requirement of a user is influenced. On the other hand, the supercooling degree of the condenser can reflect the heating quantity of the heating indoor unit, namely, when the supercooling degree is higher, the state change of the first refrigerant medium is completed earlier in the coil pipe of the condenser (the high-pressure gaseous refrigerant releases heat to become liquid refrigerant), and the gaseous refrigerant for continuously releasing heat is not available at the rear end of the coil pipe, so that the heating quantity is insufficient.
It should be understood that the identification of the condensing temperature and the supercooling degree of the candidate indoor unit may set a back pressure difference time, that is, if the condensing temperature of the candidate indoor unit is equal to the first preset condensing temperature for a period of time or the supercooling degree is greater than the first preset supercooling degree for a period of time, it is determined that the heating capacity of the candidate indoor unit is insufficient.
It should be further understood that, before determining that the heating capacity of the candidate indoor unit is insufficient according to the condensing temperature or the supercooling degree of the candidate indoor unit, it is further required to determine that the opening degree of the first electronic expansion valve of the target indoor unit is opened to the maximum, that is, the heating capacity of the target indoor unit cannot be increased after the refrigerant flow of the target indoor unit is adjusted, and at this time, it is required to start limiting the capacities of other cooperative elements (hydraulic modules) to increase the heating capacity of the candidate indoor unit.
S103: and taking the candidate indoor unit with insufficient heating capacity as a target indoor unit, and performing heating protection on the target indoor unit.
S104: and controlling the second compressor to reduce to the corresponding frequency and controlling the second electronic expansion valve to reduce to a preset opening degree.
Therefore, the frequency reduction of the second compressor and the opening degree of the second electronic expansion valve are controlled to be reduced, the heating protection of the indoor unit with insufficient heating capacity is achieved, the heating capacity of the heating indoor unit in the refrigeration mode is effectively guaranteed, and the user experience is improved.
Further, as shown in fig. 3, controlling the second compressor to decrease to a preset frequency and controlling the second electronic expansion valve to decrease to a preset opening degree includes:
s201: and controlling the frequency of the second compressor to be reduced to a first preset frequency, and controlling the opening degree of the second electronic expansion valve to be reduced to a first preset opening degree.
S202: and controlling the second compressor to operate according to the first preset frequency for a preset time.
That is to say, when it is determined that the heating capacity of the heating internal machine is insufficient, the frequency of the second compressor is controlled to be reduced to the first preset frequency and the second compressor is controlled to operate for a preset time, and meanwhile, the opening degree of the second electronic expansion valve is controlled to be reduced to the first preset opening degree, that is, the heat exchange amount of the first heat exchanger in the hydraulic module is effectively reduced by controlling the refrigerant flow in the second refrigerant medium loop in the hydraulic module and the capacity of the compressor, that is, the flow of the first refrigerant medium in the hydraulic module is reduced, so that the hydraulic module is prevented from occupying excessive heat release refrigerants, and the first refrigerant medium is promoted to be distributed to the heating internal machine, so that the heating capacity of the heating internal machine is improved.
Further, as shown in fig. 4, the method further includes:
s301: and identifying that the supercooling degree is greater than a second preset supercooling degree.
Wherein the second preset supercooling degree is smaller than the first preset supercooling degree.
S302: and controlling the second compressor to shut down and controlling the second electronic expansion valve to close.
That is, after the hydraulic module is controlled to reduce the flow of the first refrigerant medium, as the heating protection time is prolonged, the supercooling degree of the heating inner machine is still larger than the second preset supercooling degree, it is explained that the previously decreased amounts of the opening degrees of the second compressor and the second electronic expansion valve still cannot satisfy the adjustment amount of the first refrigerant medium, that is, the flow rate of the refrigerant distributed by the hydraulic module is still large, and the heating capacity of the heating indoor unit can not meet the indoor heating requirement, so that the flow rate of the first refrigerant in the hydraulic module needs to be further limited, namely, the flow of the second refrigerant medium in the hydraulic module is reduced by closing the second compressor and closing the second electronic expansion valve, therefore, the heat exchange quantity of the first heat exchanger in the hydraulic module is reduced, the flow of the first refrigerant in the first heat exchanger is further reduced, and the first refrigerant used for releasing heat flows to the heating internal machine.
It should be understood that if it is identified that the supercooling degree is smaller than the second preset supercooling degree at this time, the problem that the heating capacity of the target indoor unit of the environment is insufficient due to the fact that the current control strategy is effective is solved, and the heating capacity of the target indoor unit can be further improved by maintaining the current control strategy to continue to operate. Therefore, the second compressor can be controlled to keep running at the first preset frequency and the second electronic expansion valve can be controlled to keep the first preset opening degree.
Furthermore, if the supercooling degree is less than the third preset supercooling degree, the heating capacity protection of the target indoor unit is controlled to be stopped.
Wherein the third predetermined subcooling degree is less than the second subcooling degree.
That is to say, in the process of performing heating protection control on the target indoor unit, as time goes on, the supercooling degree of the heating indoor unit is gradually reduced to reach the third preset supercooling degree, which indicates that the heating capacity of the heating indoor unit has been improved to meet the requirement of indoor heating capacity, so that the heating capacity protection of the target indoor unit is controlled to be stopped, and the control on the opening degrees of the second compressor and the second electronic expansion valve in the hydraulic module is resumed.
Specifically, as shown in fig. 5, if the supercooling degree of the target indoor unit is rapidly decreased in the process of controlling the second compressor to operate at the first preset frequency, so that the supercooling degree of the target indoor unit is lower than the second preset supercooling degree after the second compressor operates at the first preset frequency for a preset time, at this time, the second compressor is controlled to continue to operate at the first preset frequency and the second electronic expansion valve is controlled to maintain the current opening degree, whether the supercooling degree is decreased to the third preset supercooling degree is monitored in real time, the frequency of the second compressor is controlled to recover the initial operating frequency and the opening degree of the second electronic expansion valve is controlled to recover the initial opening degree when the supercooling degree is decreased to the third preset supercooling degree, or the operating frequency of the second compressor and the opening degree of the second electronic expansion valve are controlled according to the heating requirement of the hydraulic module at the current time.
If the supercooling degree of the target indoor unit is still very high in the stage of controlling the operation of the second compressor at the first preset frequency and is larger than the second preset supercooling degree, the shutdown of the second compressor is further controlled and the second electronic expansion valve is controlled to be closed, whether the supercooling degree of the heating indoor unit is reduced to the third preset supercooling degree or not is monitored in real time, the opening degree of the second electronic expansion valve is controlled to recover the initial opening degree when the supercooling degree of the heating indoor unit is lower than the third preset supercooling degree, or the operation frequency of the second compressor and the opening degree of the second electronic expansion valve are controlled according to the heating requirement of the hydraulic module at the current moment.
It should be understood that, when the target indoor unit is subjected to heating protection, the opening degree of the first electronic expansion valve of the target indoor unit should be controlled to be maximum to increase the flow rate of the first refrigerant medium of the target indoor unit, and the first compressor should be controlled to increase the operating frequency to increase the output of the compressor.
To sum up, this application can reduce through the frequency reduction to the second compressor and the aperture of control second electronic expansion valve, comes to heat the protection to the indoor set that heating capacity is not enough to effectively ensure the heating capacity of the indoor set that heats under the refrigeration mode, promote user's experience.
In order to implement the above embodiments, the present invention further provides a control device of an air conditioning system.
Fig. 6 is a block diagram illustrating a control device of an air conditioning system according to an embodiment of the present invention. The air conditioning system comprises an outdoor unit, at least one indoor unit and at least one hydraulic module, wherein a first electronic expansion valve is arranged at a refrigerant inlet of each indoor unit, the outdoor unit comprises an outdoor heat exchanger and a first compressor, the first compressor is used for compressing a first refrigerant medium, the hydraulic module comprises a first heat exchanger, a second heat exchanger and a second compressor, the second compressor is arranged between the first heat exchanger and the second heat exchanger and is used for compressing a second refrigerant medium, an outlet of the outdoor heat exchanger is connected with an inlet of the first refrigerant medium of the first heat exchanger, an outlet of the first refrigerant medium of the first heat exchanger is connected with a refrigerant inlet of the indoor unit, the first refrigerant medium and the second refrigerant medium exchange heat in the first heat exchanger, and a second refrigerant medium outlet of the first heat exchanger is connected with a return air port of the second compressor, and an exhaust port of the second compressor is connected with an inlet of a second refrigerant medium of the second heat exchanger, and an outlet of the second refrigerant medium of the second heat exchanger is connected with an inlet of the second refrigerant medium of the first heat exchanger through a second electronic expansion valve.
As shown in fig. 6, the control device 100 of the air conditioning system includes: an acquisition module 10 and a control module 20.
The acquiring module 10 is configured to identify a main cooling operation of the air conditioning system, and use an indoor unit in a heating operation as a candidate indoor unit; detecting the condensation temperature of the candidate indoor unit, and acquiring the candidate indoor unit with insufficient heating capacity according to the condensation temperature; the control module 20 is configured to take the candidate indoor unit with insufficient heating capacity as a target indoor unit, and perform heating protection on the target indoor unit; and controlling the second compressor to reduce to a preset frequency and controlling the second electronic expansion valve to reduce to a preset opening degree.
Further, the obtaining module 10 is further configured to: and identifying that the condensation temperature is lower than a first preset condensation temperature, and determining that the heating capacity of the candidate indoor unit is insufficient.
Further, the obtaining module 10 is further configured to: and acquiring the supercooling degree of the candidate indoor unit according to the condensation temperature, identifying that the supercooling degree is greater than a first preset supercooling degree, and determining that the heating capacity of the candidate indoor unit is insufficient.
Further, the control module 20 is further configured to: controlling the frequency of the second compressor to be reduced to a first preset frequency, and controlling the opening degree of the second electronic expansion valve to be reduced to a first preset opening degree; and controlling the second compressor to operate for a preset time according to the first preset frequency.
Further, the control module 20 is further configured to: recognizing that the supercooling degree is greater than a second preset supercooling degree, wherein the second preset supercooling degree is smaller than the first preset supercooling degree; and controlling the second compressor to shut down and controlling the second electronic expansion valve to close.
Further, the control module 20 is further configured to: identifying that the supercooling degree is smaller than a third preset supercooling degree, wherein the third preset supercooling degree is smaller than the second preset supercooling degree; and controlling to stop the heating capacity protection of the target indoor unit.
Further, the control module 20 is further configured to: and controlling the opening degree of a first electronic expansion valve of the target indoor unit to be maximum, and controlling the first compressor to increase the running frequency.
It should be noted that the foregoing explanation of the embodiment of the control method of the air conditioning system is also applicable to the control device of the air conditioning system of the embodiment, and details are not repeated here.
In order to implement the above embodiment, the present invention further provides an air conditioning system, as shown in fig. 7, the air conditioning system 200 includes the control device 100 of the air conditioning system.
In order to implement the above embodiments, the present invention also proposes a readable storage medium having stored thereon a computer program which, when executed by a processor, implements the aforementioned control method of an air conditioning system.
To achieve the above embodiments, the present invention further provides a computer program product, which when executed by an instruction processor performs an artificial intelligence based method, the method comprising: .
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.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
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 steps of a custom logic function or process, and alternate implementations are included within the scope of the preferred embodiment of the present invention 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 invention.
The logic and/or steps represented in the flowcharts or otherwise described herein, e.g., an ordered listing of executable instructions that can be considered to implement logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, the computer-readable medium could even be paper or another suitable medium upon which the program is printed, as the program can be electronically captured, via for instance optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner if necessary, and then stored in a computer memory.
It should be understood that portions of the present invention 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. 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 invention 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. Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (10)
1. A control method of an air conditioning system is characterized in that the air conditioning system comprises an outdoor unit, at least one indoor unit and at least one hydraulic module, a first electronic expansion valve is arranged at a refrigerant inlet of each indoor unit, the outdoor unit comprises an outdoor heat exchanger and a first compressor, the first compressor is used for compressing a first refrigerant medium, the hydraulic module comprises a first heat exchanger, a second heat exchanger and a second compressor, the second compressor is arranged between the first heat exchanger and the second heat exchanger and used for compressing a second refrigerant medium, an outlet of the outdoor heat exchanger is connected with an inlet of the first refrigerant medium of the first heat exchanger, an outlet of the first refrigerant medium of the first heat exchanger is connected with a refrigerant inlet of the indoor unit, and the first refrigerant medium and the second refrigerant medium exchange heat in the first heat exchanger, the second refrigerant medium outlet of the first heat exchanger is connected with the return air inlet of the second compressor, the exhaust port of the second compressor is connected with the second refrigerant medium inlet of the second heat exchanger, and the second refrigerant medium outlet of the second heat exchanger is connected with the second refrigerant medium inlet of the first heat exchanger through a second electronic expansion valve, wherein the control method comprises the following steps:
identifying the main refrigeration operation of the air conditioning system, and taking an indoor unit in heating operation as a candidate indoor unit;
detecting the condensation temperature of the candidate indoor unit, and acquiring the candidate indoor unit with insufficient heating capacity according to the condensation temperature;
taking the candidate indoor unit with insufficient heating capacity as a target indoor unit, and performing heating protection on the target indoor unit;
and controlling the second compressor to reduce to a preset frequency and controlling the second electronic expansion valve to reduce to a preset opening degree.
2. The method of claim 1, wherein the detecting a condensing temperature of the candidate indoor unit and obtaining the candidate indoor unit with insufficient heating capacity according to the condensing temperature comprises:
and identifying that the condensation temperature is lower than a first preset condensation temperature, and determining that the heating capacity of the candidate indoor unit is insufficient.
3. The method of claim 1, wherein the detecting a condensing temperature of the candidate indoor unit and obtaining the candidate indoor unit with insufficient heating capacity according to the condensing temperature comprises:
and acquiring the supercooling degree of the candidate indoor unit according to the condensation temperature, identifying that the supercooling degree is greater than a first preset supercooling degree, and determining that the heating capacity of the candidate indoor unit is insufficient.
4. The control method of an air conditioning system according to claim 2 or 3, wherein the controlling the second compressor to decrease to a preset frequency and the second electronic expansion valve to decrease to a preset opening degree includes:
controlling the frequency of the second compressor to be reduced to a first preset frequency, and controlling the opening degree of the second electronic expansion valve to be reduced to a first preset opening degree;
and controlling the second compressor to operate for a preset time according to the first preset frequency.
5. The control method of an air conditioning system according to claim 3, characterized by further comprising:
recognizing that the supercooling degree is greater than a second preset supercooling degree, wherein the second preset supercooling degree is smaller than the first preset supercooling degree;
and controlling the second compressor to shut down and controlling the second electronic expansion valve to close.
6. The control method of an air conditioning system according to claim 5, characterized by further comprising:
identifying that the supercooling degree is smaller than a third preset supercooling degree, wherein the third preset supercooling degree is smaller than the second preset supercooling degree;
and controlling to stop the heating capacity protection of the target indoor unit.
7. The control method of an air conditioning system according to claim 1, further comprising:
and controlling the opening degree of a first electronic expansion valve of the target indoor unit to be maximum, and controlling the first compressor to increase the running frequency.
8. A control device of an air conditioning system is characterized in that the air conditioning system comprises an outdoor unit, at least one indoor unit and at least one hydraulic module, a first electronic expansion valve is arranged at a refrigerant inlet of each indoor unit, the outdoor unit comprises an outdoor heat exchanger and a first compressor, the first compressor is used for compressing a first refrigerant medium, the hydraulic module comprises a first heat exchanger, a second heat exchanger and a second compressor, the second compressor is arranged between the first heat exchanger and the second heat exchanger and used for compressing a second refrigerant medium, an outlet of the outdoor heat exchanger is connected with an inlet of the first refrigerant medium of the first heat exchanger, an outlet of the first refrigerant medium of the first heat exchanger is connected with a refrigerant inlet of the indoor unit, and the first refrigerant medium and the second refrigerant medium exchange heat in the first heat exchanger, the second refrigerant medium outlet of the first heat exchanger is connected with the return air inlet of the second compressor, the exhaust port of the second compressor is connected with the second refrigerant medium inlet of the second heat exchanger, and the second refrigerant medium outlet of the second heat exchanger is connected with the second refrigerant medium inlet of the first heat exchanger through a second electronic expansion valve, wherein the control device comprises the following steps:
the acquisition module is used for identifying the main refrigeration operation of the air conditioning system and taking the indoor unit in the heating operation as a candidate indoor unit; detecting the condensation temperature of the candidate indoor unit, and acquiring the candidate indoor unit with insufficient heating capacity according to the condensation temperature;
the control module is used for taking the candidate indoor unit with insufficient heating capacity as a target indoor unit and performing heating protection on the target indoor unit; and controlling the second compressor to reduce to a preset frequency and controlling the second electronic expansion valve to reduce to a preset opening degree.
9. An air conditioning system characterized by comprising the control device of the air conditioning system according to claim 8.
10. A readable storage medium on which a computer program is stored, characterized in that the program, when executed by a processor, implements a control method of an air conditioning system according to any one of claims 1 to 7.
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| CN113007876B (en) * | 2021-03-18 | 2022-05-31 | 珠海格力电器股份有限公司 | Air conditioning unit control method and device, air conditioning unit and storage medium |
| CN113834150B (en) * | 2021-09-27 | 2022-09-27 | 广东美的制冷设备有限公司 | Multi-online heat pump system, control method thereof and computer readable storage medium |
| CN114484830A (en) * | 2022-01-14 | 2022-05-13 | 青岛海尔空调器有限总公司 | Control method and control system of air conditioner, electronic equipment and storage medium |
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