CN111692735A - Air conditioner system, control method and device thereof and storage medium - Google Patents
Air conditioner system, control method and device thereof and storage medium Download PDFInfo
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- CN111692735A CN111692735A CN202010491670.3A CN202010491670A CN111692735A CN 111692735 A CN111692735 A CN 111692735A CN 202010491670 A CN202010491670 A CN 202010491670A CN 111692735 A CN111692735 A CN 111692735A
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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
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
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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
- F24F2140/00—Control inputs relating to system states
- F24F2140/20—Heat-exchange fluid temperature
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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
- F25B2500/00—Problems to be solved
- F25B2500/09—Improving heat transfers
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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
- F25B2600/00—Control issues
- F25B2600/25—Control of valves
- F25B2600/2513—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
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/21—Temperatures
- F25B2700/2115—Temperatures of a compressor or the drive means therefor
- F25B2700/21151—Temperatures of a compressor or the drive means therefor at the suction side of the compressor
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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
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses an air conditioner system and a control method, a device and a storage medium thereof, wherein the system comprises a compressor, an indoor heat exchanger, an outdoor heat exchanger, a four-way valve, a subcooler and a gas-liquid separator, wherein a first outlet of the outdoor heat exchanger is connected with an inlet of the gas-liquid separator, a liquid phase outlet of the gas-liquid separator is connected with a first port of the subcooler through a first electronic expansion valve, a gas phase outlet of the gas-liquid separator is connected with a second inlet of the outdoor heat exchanger, a second outlet of the outdoor heat exchanger is connected with a third port of the subcooler, a second port of the subcooler and an outlet of the indoor heat exchanger are both connected with a fourth port of the four-way valve, and a fourth port of the subcooler is connected with an inlet of the indoor heat exchanger. Therefore, the flow of the refrigerant in the subcooler is adjusted through the first/second electronic expansion valve, so that the heat exchange efficiency of the system is improved, the manufacturing cost is reduced, and the user experience is improved.
Description
Technical Field
The present invention relates to the field of air conditioner technologies, and in particular, to an air conditioner system, a control method of an air conditioner system, a control device of an air conditioner system, and a computer-readable storage medium.
Background
At present, in the process of evaporating the refrigerant, the air conditioning system has the refrigerant in a gas-liquid mixing state, and the air conditioning system in the related technology generally increases the volume of a heat exchanger, so that the heat exchange area is increased, and the heat exchange efficiency of the air conditioning system is ensured.
However, the related technical problem is that the increase of the volume of the heat exchanger will lead to the increase of the manufacturing cost of the air conditioning unit, and the volume and noise problems of the air conditioning system are not negligible for the user experience.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. Therefore, a first objective of the present invention is to provide an air conditioner system, which can improve the heat exchange efficiency of the system, reduce the manufacturing cost, and improve the user experience.
A second object of the present invention is to provide a control method of an air conditioner system.
A third object of the present invention is to provide a control device of an air conditioner system.
A fourth object of the invention is to propose a computer-readable storage medium.
In order to achieve the above object, an air conditioner system according to an embodiment of the first aspect of the present invention includes a compressor, an indoor heat exchanger, an outdoor heat exchanger, a four-way valve, a subcooler, and a gas-liquid separator, wherein an air outlet of the compressor is connected to a first port of the four-way valve, an air suction port of the compressor is connected to a third port of the four-way valve, a second port of the four-way valve is connected to a first inlet of the outdoor heat exchanger, a first outlet of the outdoor heat exchanger is connected to an inlet of the gas-liquid separator, a liquid phase outlet of the gas-liquid separator is connected to the first port of the subcooler through a first electronic expansion valve, a gas phase outlet of the gas-liquid separator is connected to a second inlet of the outdoor heat exchanger, a second outlet of the outdoor heat exchanger is connected to a third port of the subcooler, and both the second port of the subcooler and the outlet of the indoor heat, and a fourth port of the subcooler is connected with an inlet of the indoor heat exchanger through a second electronic expansion valve.
According to the air conditioning system provided by the embodiment of the invention, the air outlet of the compressor is connected with the first port of the four-way valve, the air suction port of the compressor is connected with the third port of the four-way valve, the second port of the four-way valve is connected with the first inlet of the outdoor heat exchanger, the first outlet of the outdoor heat exchanger is connected with the inlet of the gas-liquid separator, the liquid phase outlet of the gas-liquid separator is connected with the first port of the subcooler through the first electronic expansion valve, the gas phase outlet of the gas-liquid separator is connected with the second inlet of the outdoor heat exchanger, the second outlet of the outdoor heat exchanger is connected with the third port of the subcooler, the second port of the subcooler and the outlet of the indoor heat exchanger are both connected with the fourth port of the four-way valve, and the fourth port. Therefore, the flow of the refrigerant in the subcooler is adjusted through the first/second electronic expansion valve, so that the heat exchange efficiency of the system is improved, the manufacturing cost is reduced, and the user experience is improved.
In addition, the air conditioner system according to the above embodiment of the present invention may further have the following additional technical features:
according to one embodiment of the invention, the liquid phase outlet of the gas-liquid separator is connected with the third port of the subcooler through a first check valve, and a second check valve is further connected between the liquid phase outlet of the gas-liquid separator and the first port of the subcooler.
In order to achieve the above object, a control method of an air conditioner system according to an embodiment of a second aspect of the present invention is applied to the air conditioner system as described above, and the method includes the steps of: acquiring an operation mode of the air conditioner system; if the operation mode is a refrigeration mode, acquiring the temperature of a suction port of a compressor, the temperature of an inlet of an indoor heat exchanger and the temperature of an outlet of the indoor heat exchanger; controlling the first electronic expansion valve according to the inlet temperature of the indoor heat exchanger and the temperature of the air suction port of the compressor; and controlling the second electronic expansion valve according to the inlet temperature of the indoor heat exchanger and the outlet temperature of the indoor heat exchanger.
According to the control method of the air conditioner system, the operation mode of the air conditioner system is obtained, if the operation mode is the refrigeration mode, the temperature of a compressor air suction port, the temperature of an inlet of an indoor heat exchanger and the temperature of an outlet of the indoor heat exchanger are obtained, the first electronic expansion valve is controlled according to the temperature of the inlet of the indoor heat exchanger and the temperature of the inlet of the compressor air suction port, and the second electronic expansion valve is controlled according to the temperature of the inlet of the indoor heat exchanger and the temperature of the outlet of the indoor heat exchanger. Therefore, the flow of the refrigerant in the subcooler is adjusted by controlling the first/second electronic expansion valves, so that the heat exchange efficiency of the system is improved, the manufacturing cost is reduced, and the user experience is improved.
In addition, the control method of the air conditioner system according to the above embodiment of the present invention may further have the following additional technical features:
according to an embodiment of the invention, the method further comprises: and before the temperature of the air suction port of the compressor, the inlet temperature of the indoor heat exchanger and the outlet temperature of the indoor heat exchanger are obtained, adjusting the opening degree of the first electronic expansion valve to a first opening degree.
According to an embodiment of the present invention, the controlling the second electronic expansion valve according to the indoor heat exchanger inlet temperature and the indoor heat exchanger outlet temperature includes: detecting that the difference value between the outlet temperature of the indoor heat exchanger and the inlet temperature of the indoor heat exchanger is smaller than a first preset superheat degree, reducing the opening degree of the second electronic expansion valve by a first preset opening degree, and continuing for a first preset time; and detecting that the difference value between the outlet temperature of the indoor heat exchanger and the inlet temperature of the indoor heat exchanger is greater than a second preset superheat degree, increasing the opening degree of the second electronic expansion valve by the first preset opening degree, and continuing for the first preset time, wherein the second preset superheat degree is greater than the first preset superheat degree.
According to an embodiment of the invention, the method further comprises: determining the running state of the air conditioner system according to the inlet temperature of the indoor heat exchanger and the outlet temperature of the indoor heat exchanger; and when the stable operation of the air conditioner system is detected, controlling the first electronic expansion valve according to the inlet temperature of the indoor heat exchanger and the temperature of the air suction port of the compressor.
According to one embodiment of the present invention, the determining an operating state of the air conditioner system based on the indoor heat exchanger inlet temperature and the indoor heat exchanger outlet temperature comprises: and detecting that the difference value between the outlet temperature of the indoor heat exchanger and the inlet temperature of the indoor heat exchanger is greater than or equal to a first preset superheat degree and less than or equal to a second preset superheat degree, and the fluctuation range of the outlet temperature of the indoor heat exchanger in a second preset time is less than the preset fluctuation range, and determining that the air conditioner system stably operates.
According to an embodiment of the present invention, the controlling the first electronic expansion valve according to the indoor heat exchanger inlet temperature and the compressor suction port temperature includes: detecting that the difference value between the temperature of the air suction port of the compressor and the temperature of the inlet of the indoor heat exchanger is greater than a third preset superheat degree, increasing the opening degree of the first electronic expansion valve by a second preset opening degree, and continuing for a third preset time; and detecting that the difference value between the temperature of the air suction port of the compressor and the inlet temperature of the indoor heat exchanger is smaller than a fourth preset superheat degree, reducing the opening degree of the first electronic expansion valve by the second preset opening degree, and continuing for the second preset time, wherein the fourth preset superheat degree is smaller than the third preset superheat degree.
In order to achieve the above object, a control device of an air conditioner system according to an embodiment of a third aspect of the present invention is a control device of an air conditioner system as described above, the device including: the first acquisition module is used for acquiring the operation mode of the air conditioner system; the second acquisition module is used for acquiring the temperature of a suction port of the compressor, the temperature of an inlet of the indoor heat exchanger and the temperature of an outlet of the indoor heat exchanger if the operation mode is a refrigeration mode; the control module is used for controlling the first electronic expansion valve according to the inlet temperature of the indoor heat exchanger and the temperature of the air suction port of the compressor; and controlling the second electronic expansion valve according to the inlet temperature of the indoor heat exchanger and the outlet temperature of the indoor heat exchanger.
According to the control device of the air conditioner system, the first obtaining module is used for obtaining the operation mode of the air conditioner system, when the operation mode is the refrigeration mode, the second obtaining module is used for obtaining the temperature of the air suction port of the compressor, the temperature of the inlet of the indoor heat exchanger and the temperature of the outlet of the indoor heat exchanger, further, the control module is used for controlling the first electronic expansion valve according to the temperature of the inlet of the indoor heat exchanger and the temperature of the air suction port of the compressor, and the control module is used for controlling the second electronic expansion valve according to the temperature of the inlet of the indoor heat exchanger and the temperature of the outlet of the. Therefore, the flow of the refrigerant in the subcooler is adjusted by controlling the first/second electronic expansion valves, so that the heat exchange efficiency of the system is improved, the manufacturing cost is reduced, and the user experience is improved.
To achieve the above object, a computer-readable storage medium according to a fourth aspect of the present invention is a computer-readable storage medium having stored thereon a control method computer program of an air conditioner system, which when executed by a processor, implements the control method of the air conditioner system as described above.
According to the computer-readable storage medium of the embodiment of the invention, by executing the control method of the air conditioner system stored thereon and the computer program, the flow rate of the refrigerant in the subcooler can be adjusted through controlling the first/second electronic expansion valves, so that the heat exchange efficiency of the system is improved, meanwhile, the manufacturing cost is reduced, and the user experience is improved.
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
FIG. 1 is a schematic diagram of an air conditioner system according to an embodiment of the present invention;
fig. 2 is a flowchart illustrating a control method of an air conditioner system according to an embodiment of the present invention;
fig. 3 is a flowchart illustrating a control method of an air conditioner system according to an embodiment of the present invention;
fig. 4 is a flowchart illustrating a control method of an air conditioner system according to an embodiment of the present invention;
fig. 5 is a flowchart illustrating a control method of an air conditioner system according to an embodiment of the present invention;
fig. 6 is a flowchart illustrating a control method of an air conditioner system according to an embodiment of the present invention;
FIG. 7 is a flow chart illustrating a method of controlling an air conditioner system according to an embodiment of the present invention;
fig. 8 is a block diagram schematically illustrating a control apparatus of an air conditioner system according to an embodiment of the present invention.
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 conditioner system, a control method, an apparatus, and a storage medium thereof according to an embodiment of the present invention are described below with reference to the accompanying drawings.
Fig. 1 is a schematic structural view of an air conditioner system according to an embodiment of the present invention.
As shown in fig. 1, the air conditioner system 1000 includes a compressor 1, an indoor heat exchanger 2, an outdoor heat exchanger 3, a four-way valve 4, a subcooler 5, and a gas-liquid separator 6.
Specifically, as shown in fig. 1, the air outlet 1b of the compressor 1 is connected to the first port 4a of the four-way valve 4, the air suction port 1a of the compressor 1 is connected to the third port 4c of the four-way valve 4, the second port 4b of the four-way valve 4 is connected to the first inlet 3a of the outdoor heat exchanger 3, the first outlet 3b of the outdoor heat exchanger 3 is connected to the inlet 6a of the gas-liquid separator 6, the liquid phase outlet 6c of the gas-liquid separator 6 is connected to the first port 5a of the subcooler 5 through the first electronic expansion valve S1, the gas phase outlet 6b of the gas-liquid separator 6 is connected to the second inlet 3c of the outdoor heat exchanger 3, the second outlet 3d of the outdoor heat exchanger 3 is connected to the third port 5c of the subcooler 5, both the second port 5b of the subcooler 5 and the outlet 2b of the indoor heat exchanger 2 are connected to the fourth port 4d of the four-way valve 4, and the fourth port 5d of the subcooler 5 is connected to the inlet 2.
It should be understood that the refrigerant flow rate through the chiller 5 may be adjusted by the first electronic expansion valve S1 disposed between the liquid-phase outlet 6c of the gas-liquid separator 6 and the first port 5a of the subcooler 5, and the second electronic expansion valve S2 disposed between the fourth port 5d of the subcooler 5 and the inlet 2a of the indoor heat exchanger 2, and thus, the refrigerant flow rate through the indoor heat exchanger 2 may be adjusted, thereby reducing the internal refrigerant resistance of the indoor heat exchanger 2 and improving the energy efficiency and heat exchange capacity of the air conditioner system.
Further, as shown in fig. 1, the liquid phase outlet 6c of the gas-liquid separator 6 is connected to the third port 5c of the subcooler 5 through a first check valve a, and a second check valve B is connected between the liquid phase outlet 6c of the gas-liquid separator 6 and the first port 5a of the subcooler 5.
It should be understood that the refrigerant of the liquid phase outlet 6C of the gas-liquid separator 6 may be branched by the first check valve a disposed between the liquid phase outlet 6C of the gas-liquid separator 6 and the third port 5C of the subcooler 5, and by the second check valve B disposed between the liquid phase outlet 6C of the gas-liquid separator 6 and the first port 5a of the subcooler 5, and thus, the flow rate of the refrigerant in the subcooler 5 is increased, the degree of subcooling of the refrigerant is increased, and thus, the energy efficiency of the air conditioner system is improved.
The refrigerant flow path of the air conditioner system according to the embodiment of the present invention will be further described with reference to the drawings.
Taking the air conditioner system in a refrigeration mode as an example, a high-temperature and high-pressure gas-phase refrigerant compressed by the compressor 1 enters the upper part of the outdoor heat exchanger 3 from a first inlet 3a of the outdoor heat exchanger 3, part of the refrigerant is condensed and then flows out from a first outlet 3b of the outdoor heat exchanger 3, and enters a gas-liquid separator 6 from an inlet 6a of the gas-liquid separator 6 for gas-liquid separation, wherein the separated gas-phase refrigerant flows out from a gas-phase outlet 6b, and enters the lower part of the outdoor heat exchanger 3 through a second inlet 3c of the outdoor heat exchanger 3 to be continuously condensed, the separated liquid-phase refrigerant flows out from a liquid-phase outlet 6c of the gas-liquid separator 6 and is divided into two paths, one path of liquid-phase refrigerant passes through the first check valve a and is mixed with the refrigerant at a second outlet 3d of the lower part of the outdoor heat exchanger 3, and then passes, the refrigerant is throttled by the second electronic expansion valve S2, enters the indoor heat exchanger 2 through the inlet 2a of the indoor heat exchanger 2, evaporates and absorbs heat, and the other liquid-phase refrigerant passes through the second check valve B, the first electronic expansion valve S1, the first port 5a and the second port 5B of the subcooler 5 in this order, is mixed with the refrigerant at the outlet 2B of the indoor heat exchanger 2, and then enters the four-way selector valve 4 through the fourth port 4d of the four-way valve 4.
In other words, in the embodiment of the present invention, by providing the first check valve a and the second check valve B, the refrigerant at the liquid phase outlet 6c of the gas-liquid separator 6 of the air conditioner system can be divided into two paths, wherein one path sequentially passes through the second check valve B, the first electronic expansion valve S1, the first port 5a of the subcooler 5, and the second port 5B, and then bypasses to the outlet 2B of the indoor heat exchanger 2, so as to prevent the refrigerant in the subcooler from being too large to be completely evaporated when the air conditioner system is in the cooling mode, which leads to the suction and liquid entrainment of the compressor 1, and in addition, it can be ensured that the indoor heat exchanger 2 is not bypassed when the air conditioner system is in the heating mode, thereby maintaining the normal operation of the air conditioner system.
In summary, according to the air conditioning system of the embodiment of the present invention, the air outlet of the compressor is connected to the first port of the four-way valve, the air suction port of the compressor is connected to the third port of the four-way valve, the second port of the four-way valve is connected to the first inlet of the outdoor heat exchanger, the first outlet of the outdoor heat exchanger is connected to the inlet of the gas-liquid separator, the liquid phase outlet of the gas-liquid separator is connected to the first port of the subcooler through the first electronic expansion valve, the gas phase outlet of the gas-liquid separator is connected to the second inlet of the outdoor heat exchanger, the second outlet of the outdoor heat exchanger is connected to the third port of the subcooler, the second port of the subcooler and the outlet of the indoor heat exchanger are both connected to the fourth port of the four-way valve, and the fourth. Therefore, the flow of the refrigerant in the subcooler is adjusted through the first/second electronic expansion valve, so that the heat exchange efficiency of the system is improved, the manufacturing cost is reduced, and the user experience is improved.
Further, in order to avoid that the refrigerant in the subcooler 5 is too large to be completely evaporated, which causes the suction of the compressor 1 to carry liquid and improves the evaporation heat transfer coefficient of the indoor heat exchanger 2, the embodiment of the present invention further provides a control method for the air conditioner system, which performs coupling control on the opening degrees of the first electronic expansion valve S1 and the second electronic expansion valve S2.
Fig. 2 is a flowchart illustrating a control method of an air conditioner system according to an embodiment of the present invention.
As shown in fig. 2, the control method of the air conditioner system includes the steps of:
and S101, acquiring the operation mode of the air conditioner system.
It should be noted that, when the operation mode of the air conditioner system is the cooling mode, the refrigerant is bypassed to the indoor heat exchanger, and at this time, the opening degree of the first electromagnetic valve and the second electromagnetic valve may be controlled, so as to control the refrigerant flow rate in the indoor heat exchanger to improve the heat exchange energy efficiency of the air conditioner system, and when the operation mode of the air conditioner system is the heating mode, the refrigerant is not bypassed to the indoor heat exchanger, and at this time, the normal operation of the air conditioner system may be maintained.
And S102, if the operation mode is the cooling mode, acquiring the temperature of a suction port of the compressor, the temperature of an inlet of the indoor heat exchanger and the temperature of an outlet of the indoor heat exchanger.
Alternatively, the indoor heat exchanger inlet temperature T1 may be obtained by providing a temperature sensor C1 at the indoor heat exchanger inlet, the indoor heat exchanger outlet temperature T2 may be obtained by providing a temperature sensor C2 at the indoor heat exchanger outlet, and the compressor suction temperature T3 may be obtained by providing a temperature sensor C3 at the compressor suction.
And S103, controlling the first electronic expansion valve according to the inlet temperature of the indoor heat exchanger and the temperature of the air suction port of the compressor.
It should be understood that, through the control of the first electronic expansion valve, the flow of the refrigerant entering the indoor heat exchanger can be adjusted, and the heat exchange energy efficiency of the indoor heat exchanger is improved.
And S104, controlling the second electronic expansion valve according to the inlet temperature of the indoor heat exchanger and the outlet temperature of the indoor heat exchanger.
It should be understood that the flow rate of the refrigerant entering the subcooler can be adjusted by controlling the second electronic expansion valve, so that the supercooling degree of the refrigerant in the subcooler is improved.
Further, as shown in fig. 3, the method further includes:
and S1021, before the temperature of the air suction port of the compressor, the inlet temperature of the indoor heat exchanger and the outlet temperature of the indoor heat exchanger are obtained, the opening degree of the first electronic expansion valve is adjusted to be a first opening degree.
It can be understood that, before the compressor suction temperature T3, the indoor heat exchanger inlet temperature T1 and the indoor heat exchanger outlet temperature T2 are obtained, i.e., when the air conditioner system is in the start-up stage, the opening degree n1 of the first electronic expansion valve is adjusted to the first opening degree K1.
Alternatively, the first opening degree K1 may be set accordingly according to the minimum opening degree of the first electronic expansion valve.
Further, as shown in fig. 4, the controlling the second electronic expansion valve according to the inlet temperature of the indoor heat exchanger and the outlet temperature of the indoor heat exchanger includes:
s201, detecting that the difference value between the outlet temperature of the indoor heat exchanger and the inlet temperature of the indoor heat exchanger is smaller than a first preset superheat degree, reducing the opening degree of the second electronic expansion valve by a first preset opening degree, and continuing for a first preset time.
It should be understood that the difference between the indoor heat exchanger outlet temperature T2 and the indoor heat exchanger inlet temperature T1 may be taken as the superheat degree at the indoor heat exchanger outlet, in other words, the superheat degree at the indoor heat exchanger outlet is detected to be less than the first preset superheat degree Tr1, i.e., T2-T1 < Tr1, and it is considered that the heat exchange capacity of the indoor heat exchanger is insufficient, and the opening degree n2 of the second electronic expansion valve is decreased by the first preset opening degree Ky1 for the first preset time T1.
Alternatively, the first preset superheat Tr1, the first preset opening degree Ky1, and the first preset time t1 may be set accordingly according to the actual configuration of the air conditioner system.
S202, detecting that the difference value between the outlet temperature of the indoor heat exchanger and the inlet temperature of the indoor heat exchanger is larger than a second preset superheat degree, increasing the opening degree of the second electronic expansion valve by a first preset opening degree, and continuing for a first preset time, wherein the second preset superheat degree is larger than the first preset superheat degree.
That is, when the difference T between the outlet temperature T2 of the indoor heat exchanger and the inlet temperature T1 of the indoor heat exchanger is detected to be greater than the second preset superheat degree Tr2, i.e., T2-T1 > Tr2, it is considered that the heat exchange capability of the indoor heat exchanger is excessive, the opening degree n2 of the second electronic expansion valve is increased by the first preset opening degree Ky1 for the first preset time T1, wherein the second preset superheat degree Tr2 is greater than the first preset superheat degree Tr 1.
Alternatively, the second preset superheat degree Tr2 may be set accordingly according to the actual configuration of the air conditioner system.
Further, as shown in fig. 4, the method further includes:
and S203, determining the running state of the air conditioner system according to the inlet temperature of the indoor heat exchanger and the outlet temperature of the indoor heat exchanger.
It is understood that, after the second solenoid valve is controlled according to the indoor heat exchanger inlet temperature T1 and the indoor heat exchanger outlet temperature T2, it is also determined whether the air conditioner system enters a stable operation stage according to the indoor heat exchanger inlet temperature T1 and the indoor heat exchanger outlet temperature T2.
And S204, detecting that the air conditioner system stably operates, and controlling the first electronic expansion valve according to the inlet temperature of the indoor heat exchanger and the temperature of the air suction port of the compressor.
It will be appreciated that, upon detection of a steady operation of the air conditioner system, control of the second electronic expansion valve may be stopped and the first electronic expansion valve may be controlled based upon the indoor heat exchanger inlet temperature T1 and the compressor suction temperature T3.
Further, as shown in fig. 5, determining the operation state of the air conditioner system according to the indoor heat exchanger inlet temperature and the indoor heat exchanger outlet temperature includes:
s2031, detecting that the difference value between the outlet temperature of the indoor heat exchanger and the inlet temperature of the indoor heat exchanger is greater than or equal to a first preset superheat degree and less than or equal to a second preset superheat degree, and the fluctuation range of the outlet temperature of the indoor heat exchanger in a second preset time is less than a preset fluctuation range, and determining that the air conditioner system is stably operated.
That is, it is determined that the air conditioner system has entered the stable operation stage when it is detected that the difference between the indoor heat exchanger outlet temperature T2 and the indoor heat exchanger inlet temperature T1 is greater than or equal to the first preset superheat degree Tr1 and less than or equal to the second preset superheat degree Tr2, and the fluctuation width Tf of the indoor heat exchanger outlet temperature T2 over the second preset time T2 is less than the preset fluctuation width Tyf.
Further, as shown in fig. 6, the first electronic expansion valve is controlled according to the inlet temperature of the indoor heat exchanger and the temperature of the compressor suction port, and includes:
s301, detecting that the difference value between the temperature of the air suction port of the compressor and the temperature of the inlet of the indoor heat exchanger is larger than a third preset superheat degree, increasing the opening degree of the first electronic expansion valve by a second preset opening degree, and continuing for a third preset time.
It should be understood that the difference between the compressor suction port temperature T3 and the indoor heat exchanger inlet temperature T1 may be regarded as the degree of superheat at the compressor suction port, in other words, the degree of superheat at the compressor suction port is detected to be greater than the third preset opening degree Tr3, i.e., T3-T1 > Tr3, and it may be considered that the supercooling ability of the subcooler is excessive, the opening degree n1 of the first electronic expansion valve is increased by the second preset opening degree Ky2, and continues for the third preset time T3.
Alternatively, the third preset opening Tr3, the second preset opening Ky2 and the third preset time t3 may be set accordingly according to the actual configuration of the air conditioner system.
S302, detecting that the difference value between the temperature of the air suction port of the compressor and the temperature of the inlet of the indoor heat exchanger is smaller than a fourth preset superheat degree, reducing the opening degree of the first electronic expansion valve by a second preset opening degree, and continuing for a second preset time, wherein the fourth preset superheat degree is smaller than the third preset superheat degree.
That is, when it is detected that the difference between the compressor suction port temperature T3 and the indoor heat exchanger inlet temperature T1 is less than the fourth preset superheat degree Tr4, which is less than the supercooling capacity of the subcooler, the opening degree n2 of the first electronic expansion valve is decreased by the second preset opening degree Ky2 for the second preset time T3, wherein the fourth preset superheat degree Tr4 is less than the third preset superheat degree Tr 3.
Alternatively, the fourth preset superheat degree Tr4 may be set accordingly according to the actual configuration of the air conditioner system.
Referring to fig. 7 and the embodiment of the present invention, the following description is made on the control method of the air conditioner system according to the embodiment of the present invention, as shown in fig. 7, the air conditioner system is started up, and step S1 is executed.
S1, the opening degree of the first electronic expansion valve is adjusted to the first opening degree.
And S2, acquiring the temperature of a compressor suction port, the temperature of an indoor heat exchanger inlet and the temperature of an indoor heat exchanger outlet.
And S3, judging whether the difference value between the outlet temperature of the indoor heat exchanger and the inlet temperature of the indoor heat exchanger is smaller than a first preset superheat degree, if so, executing a step S4, and if not, executing a step S5.
S4, the opening degree of the second electronic expansion valve is decreased by a first preset opening degree for a first preset time, and step S3 is executed.
And S5, judging whether the difference value between the outlet temperature of the indoor heat exchanger and the inlet temperature of the indoor heat exchanger is larger than a second preset superheat degree, if so, executing a step S6, and if not, executing a step S7.
S6, the opening degree of the second electronic expansion valve is increased by a first preset opening degree for a first preset time, and step S3 is executed.
And S7, judging whether the difference value between the outlet temperature of the indoor heat exchanger and the inlet temperature of the indoor heat exchanger is greater than or equal to a first preset superheat degree and less than or equal to a second preset superheat degree, and the fluctuation range of the outlet temperature of the indoor heat exchanger in a second preset time is less than a preset fluctuation range, if so, executing the step S8, otherwise, executing the step S7 repeatedly.
And S8, judging whether the difference value between the temperature of the suction port of the compressor and the temperature of the inlet of the indoor heat exchanger is larger than a third preset superheat degree, if so, executing a step S9, and if not, executing a step S10.
S9, the opening degree of the first electronic expansion valve is increased by a second preset opening degree for a third preset time, and step S3 is performed.
And S10, judging whether the difference value between the temperature of the air suction port of the compressor and the temperature of the inlet of the indoor heat exchanger is less than a fourth preset superheat degree, if so, executing a step S11, and if not, executing a step S3.
S11, the opening degree of the first electronic expansion valve is decreased by a second preset opening degree for a second preset time, and step S3 is executed.
In summary, according to the control method of the air conditioner system in the embodiment of the present invention, the operation mode of the air conditioner system is obtained, and if the operation mode is the cooling mode, the compressor air suction port temperature, the indoor heat exchanger inlet temperature, and the indoor heat exchanger outlet temperature are obtained, and the first electronic expansion valve is controlled according to the indoor heat exchanger inlet temperature and the compressor air suction port temperature, and the second electronic expansion valve is controlled according to the indoor heat exchanger inlet temperature and the indoor heat exchanger outlet temperature. Therefore, the flow of the refrigerant in the subcooler is adjusted by controlling the first/second electronic expansion valves, so that the heat exchange efficiency of the system is improved, the manufacturing cost is reduced, and the user experience is improved.
Fig. 8 is a control device of an air conditioner system according to an embodiment of the present invention.
Further, an embodiment of the present invention further provides a control device 100 for an air conditioner system of the air conditioner system, as shown in fig. 8, the device 100 includes: a first acquisition module 10, a second acquisition module 20, and a control module 30.
The first obtaining module 10 is configured to obtain an operation mode of the air conditioner system; the second obtaining module 20 is configured to obtain a temperature of a suction port of the compressor, an inlet temperature of the indoor heat exchanger, and an outlet temperature of the indoor heat exchanger if the operation mode is the cooling mode; the control module 30 is configured to control the first electronic expansion valve according to the temperature of the inlet of the indoor heat exchanger and the temperature of the air suction port of the compressor, and control the second electronic expansion valve according to the temperature of the inlet of the indoor heat exchanger and the temperature of the outlet of the indoor heat exchanger.
It should be noted that the control device of the air conditioner system according to the embodiment of the present invention corresponds to the specific implementation of the control method of the air conditioner system according to the embodiment of the present invention, and details are not repeated herein.
In summary, according to the control device of the air conditioner system in the embodiment of the present invention, the first obtaining module obtains the operation mode of the air conditioner system, and when the operation mode is the cooling mode, the second obtaining module obtains the compressor air suction port temperature, the indoor heat exchanger inlet temperature and the indoor heat exchanger outlet temperature, and further, the control module controls the first electronic expansion valve according to the indoor heat exchanger inlet temperature and the compressor air suction port temperature, and controls the second electronic expansion valve according to the indoor heat exchanger inlet temperature and the indoor heat exchanger outlet temperature. Therefore, the flow of the refrigerant in the subcooler is adjusted by controlling the first/second electronic expansion valves, so that the heat exchange efficiency of the system is improved, the manufacturing cost is reduced, and the user experience is improved.
Further, an embodiment of the present invention also provides a computer-readable storage medium on which a control method computer program of an air conditioner system is stored, which when executed by a processor implements the control method of the air conditioner system as described above.
In summary, according to the computer-readable storage medium of the embodiment of the present invention, by executing the control method of the air conditioner system stored thereon, the flow rate of the refrigerant in the subcooler can be adjusted through controlling the first/second electronic expansion valves, so as to improve the heat exchange efficiency of the system, reduce the manufacturing cost, and improve the user experience.
It should be noted that the logic and/or steps represented in the flowcharts or otherwise described herein, such as 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. For example, if implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
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 do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.
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.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
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. An air conditioner system is characterized in that the air conditioner system comprises a compressor, an indoor heat exchanger, an outdoor heat exchanger, a four-way valve, a subcooler and a gas-liquid separator,
the air outlet of the compressor is connected with the first port of the four-way valve, the air suction port of the compressor is connected with the third port of the four-way valve, the second port of the four-way valve is connected with the first inlet of the outdoor heat exchanger, the first outlet of the outdoor heat exchanger is connected with the inlet of the gas-liquid separator, the liquid phase outlet of the gas-liquid separator is connected with the first port of the subcooler through a first electronic expansion valve, a gas phase outlet of the gas-liquid separator is connected with a second inlet of the outdoor heat exchanger, a second outlet of the outdoor heat exchanger is connected with a third port of the subcooler, the second port of the subcooler and the outlet of the indoor heat exchanger are both connected with the fourth port of the four-way valve, and a fourth port of the subcooler is connected with an inlet of the indoor heat exchanger through a second electronic expansion valve.
2. The air conditioner system as claimed in claim 1, wherein the liquid phase outlet of the gas-liquid separator is connected to the third port of the subcooler through a first check valve, and a second check valve is further connected between the liquid phase outlet of the gas-liquid separator and the first port of the subcooler.
3. A control method of an air conditioner system, characterized in that the method is used for the air conditioner system as claimed in claim 1 or 2, the method comprising the steps of:
acquiring an operation mode of the air conditioner system;
if the operation mode is a refrigeration mode, acquiring the temperature of a suction port of a compressor, the temperature of an inlet of an indoor heat exchanger and the temperature of an outlet of the indoor heat exchanger;
controlling the first electronic expansion valve according to the inlet temperature of the indoor heat exchanger and the temperature of the air suction port of the compressor; and the number of the first and second groups,
and controlling the second electronic expansion valve according to the inlet temperature of the indoor heat exchanger and the outlet temperature of the indoor heat exchanger.
4. The method of claim 3, wherein the method further comprises:
and before the temperature of the air suction port of the compressor, the inlet temperature of the indoor heat exchanger and the outlet temperature of the indoor heat exchanger are obtained, adjusting the opening degree of the first electronic expansion valve to a first opening degree.
5. The method of claim 4, wherein said controlling the second electronic expansion valve based on the indoor heat exchanger inlet temperature and the indoor heat exchanger outlet temperature comprises:
detecting that the difference value between the outlet temperature of the indoor heat exchanger and the inlet temperature of the indoor heat exchanger is smaller than a first preset superheat degree, reducing the opening degree of the second electronic expansion valve by a first preset opening degree, and continuing for a first preset time;
and detecting that the difference value between the outlet temperature of the indoor heat exchanger and the inlet temperature of the indoor heat exchanger is greater than a second preset superheat degree, increasing the opening degree of the second electronic expansion valve by the first preset opening degree, and continuing for the first preset time, wherein the second preset superheat degree is greater than the first preset superheat degree.
6. The method of claim 5, wherein the method further comprises:
determining the running state of the air conditioner system according to the inlet temperature of the indoor heat exchanger and the outlet temperature of the indoor heat exchanger;
and when the stable operation of the air conditioner system is detected, controlling the first electronic expansion valve according to the inlet temperature of the indoor heat exchanger and the temperature of the air suction port of the compressor.
7. The method of claim 6, wherein said determining an operating condition of the air conditioner system based on the indoor heat exchanger inlet temperature and the indoor heat exchanger outlet temperature comprises:
and detecting that the difference value between the outlet temperature of the indoor heat exchanger and the inlet temperature of the indoor heat exchanger is greater than or equal to a first preset superheat degree and less than or equal to a second preset superheat degree, and the fluctuation range of the outlet temperature of the indoor heat exchanger in a second preset time is less than the preset fluctuation range, and determining that the air conditioner system stably operates.
8. The method of claim 4, wherein said controlling the first electronic expansion valve based on the indoor heat exchanger inlet temperature and the compressor suction temperature comprises:
detecting that the difference value between the temperature of the air suction port of the compressor and the temperature of the inlet of the indoor heat exchanger is greater than a third preset superheat degree, increasing the opening degree of the first electronic expansion valve by a second preset opening degree, and continuing for a third preset time;
and detecting that the difference value between the temperature of the air suction port of the compressor and the inlet temperature of the indoor heat exchanger is smaller than a fourth preset superheat degree, reducing the opening degree of the first electronic expansion valve by the second preset opening degree, and continuing for the second preset time, wherein the fourth preset superheat degree is smaller than the third preset superheat degree.
9. A control device for an air conditioner system, characterized in that the device is used for the air conditioner system as claimed in claim 1 or 2, the device comprising:
the first acquisition module is used for acquiring the operation mode of the air conditioner system;
the second acquisition module is used for acquiring the temperature of a suction port of the compressor, the temperature of an inlet of the indoor heat exchanger and the temperature of an outlet of the indoor heat exchanger if the operation mode is a refrigeration mode;
the control module is used for controlling the first electronic expansion valve according to the inlet temperature of the indoor heat exchanger and the temperature of the air suction port of the compressor; and the number of the first and second groups,
and controlling the second electronic expansion valve according to the inlet temperature of the indoor heat exchanger and the outlet temperature of the indoor heat exchanger.
10. A computer-readable storage medium, characterized in that a control method of an air conditioner system, a computer program is stored thereon, which when executed by a processor, implements the control method of the air conditioner system according to any one of claims 3 to 8.
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