CN113503620A - Air conditioning system control method and device, storage medium and air conditioning system - Google Patents
Air conditioning system control method and device, storage medium and air conditioning system Download PDFInfo
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- CN113503620A CN113503620A CN202110797128.5A CN202110797128A CN113503620A CN 113503620 A CN113503620 A CN 113503620A CN 202110797128 A CN202110797128 A CN 202110797128A CN 113503620 A CN113503620 A CN 113503620A
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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
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
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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
- F24F11/62—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
- F24F11/65—Electronic processing for selecting an operating mode
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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
- F24F11/88—Electrical aspects, e.g. circuits
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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
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
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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
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
- F24F2110/12—Temperature of the outside air
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Abstract
The disclosure provides an air conditioning system control method, an air conditioning system control device, a storage medium and an air conditioning system, wherein the method comprises the following steps: determining the optimal supercooling degree range of the operation of the air conditioning system; acquiring the current supercooling degree of the air conditioning system; determining whether the circulation quantity of the refrigerant in the air conditioning system meets the operation requirement or not according to the comparison result of the current supercooling degree and the optimal supercooling degree range; and if the circulating quantity of the refrigerant in the air conditioning system is judged not to meet the operation requirement, the air replenishing electromagnetic valve is controlled to be opened, the opening degrees of the first electronic expansion valve and the second expansion valve are adjusted, and the circulating quantity of the refrigerant is increased or reduced. The control method of the air conditioning system enables the air conditioning system with the refrigerant perfusion amount according to the maximum connecting pipe length standard to regulate and control the refrigerant circulation amount in the system, so that the refrigerant circulation amount always meets the operation requirement of the system, and the problem that the refrigerant is additionally added into the system according to the stage requirement during the after-sale debugging of the air conditioning system is solved.
Description
Technical Field
The disclosure belongs to the technical field of air conditioners, and particularly relates to an air conditioner system control method and device, a storage medium and an air conditioner system.
Background
After the split air conditioner product is sold to a customer, due to different customer requirements or different building installation environments, the lengths of the connecting pipes of the indoor unit and the outdoor unit are possibly different, if the length of the connecting pipe exceeds the length specified in the installation specification, an installer is required to calculate the total adding amount according to the length of the connecting pipe actually used and the unit length adding amount specified in the installation specification, and then manual operation is carried out through external equipment (comprising a refrigerant tank, an electronic scale and a pipeline for connecting the refrigerant tank and a unit valve), so that the refrigerant is added, the efficiency of after-sales installation is increased, extra after-sales installation cost is generated, and customer dissatisfaction is caused. Meanwhile, the phenomenon that the adding amount is inaccurate due to improper operation can also occur, and the air-conditioning performance and the reliability of the compressor can be influenced.
Disclosure of Invention
Therefore, the technical problem to be solved by the present disclosure is to provide an air conditioning system control method, device, storage medium and air conditioning system by adding a refrigerant when a split type air conditioner is installed after sale.
In order to solve the problems, the present disclosure provides an air conditioning system control method, where the air conditioning system includes a compressor, a four-way valve, an outdoor heat exchanger, an indoor heat exchanger, and a liquid storage tank, an inlet of the liquid storage tank is communicated with an outlet of the outdoor heat exchanger through a first electronic expansion valve, a gas outlet of the liquid storage tank is communicated with a medium-pressure air supplement port of the compressor through an air supplement solenoid valve, a liquid outlet of the liquid storage tank is communicated with the indoor heat exchanger through a second electronic expansion valve, and a refrigerant is poured into the air conditioning system according to a maximum connection pipe length standard; the control method comprises the following steps:
determining an optimal supercooling degree range TL 1-TL 2 for the operation of the air-conditioning system;
acquiring the current supercooling degree TL of the air-conditioning system;
determining whether the refrigerant circulation volume in the air-conditioning system meets the operation requirement or not according to the comparison result of the current supercooling degree TL and the optimal supercooling degree range TL 1-TL 2;
and if the circulating quantity of the refrigerant in the air conditioning system does not meet the operation requirement, controlling the air replenishing electromagnetic valve to be opened, and adjusting the opening degrees of the first electronic expansion valve and the second expansion valve to increase or decrease the circulating quantity of the refrigerant until the circulating quantity of the refrigerant meets the operation requirement.
The purpose of the present disclosure and the technical problems solved thereby can be further achieved by the following technical measures.
In some embodiments, if it is determined that the refrigerant circulation amount in the air conditioning system does not meet the operation requirement, the step of controlling the gas supplementing solenoid valve to open and adjusting the opening degrees of the first electronic expansion valve and the second expansion valve to increase or decrease the refrigerant circulation amount until the refrigerant circulation amount meets the operation requirement includes:
when it is judged that the refrigerant circulation amount is excessive,
in a cooling mode, increasing the opening degree of the first electronic expansion valve and decreasing the opening degree of the second electronic expansion valve;
in the heating mode, the opening degree of the first electronic expansion valve is reduced, and the opening degree of the second electronic expansion valve is increased;
and/or the presence of a gas in the gas,
when it is judged that the refrigerant circulation amount is insufficient,
in the cooling mode, the opening degree of the first electronic expansion valve is reduced, and the opening degree of the second electronic expansion valve is increased;
in the heating mode, the opening degree of the first electronic expansion valve is increased, and the opening degree of the second electronic expansion valve is decreased.
In some embodiments, the step of determining whether the circulation amount of the refrigerant in the air conditioning system is appropriate according to the comparison result between the current supercooling degree TL and the optimal supercooling degree range TL 1-TL 2 includes:
when TL is less than TL1, judging that the circulating quantity of the refrigerant is insufficient;
when TL1 is not less than TL2, judging that the refrigerant circulation quantity meets the operation requirement;
when TL > TL2, it is judged that the refrigerant circulation amount is excessive.
In some embodiments, the step of obtaining the current supercooling degree TL of the air conditioning system includes:
detecting the discharge pressure P of the compressor and the outlet temperature T1 of the outdoor heat exchanger in a refrigeration mode, and calculating the current supercooling degree TL according to the discharge pressure P and the outlet temperature T1;
and/or the presence of a gas in the gas,
and under the heating mode, detecting the discharge pressure P of the compressor and the outlet temperature T2 of the indoor heat exchanger, and calculating the current supercooling degree TL according to the discharge pressure P and the outlet temperature T2.
In some embodiments, the step of determining the optimal supercooling degree range TL 1-TL 2 for the operation of the air conditioning system includes:
and obtaining the indoor ambient temperature Tn and the outdoor ambient temperature Tw, and determining the optimal supercooling degree range TL 1-TL 2 of the air conditioning system running at the current ambient temperature according to the indoor ambient temperature Tn and the outdoor ambient temperature Tw.
A control device of an air conditioning system comprises a compressor, a four-way valve, an outdoor heat exchanger, an indoor heat exchanger and a liquid storage tank, wherein an inlet of the liquid storage tank is communicated with an outlet of the outdoor heat exchanger through a first electronic expansion valve, a gas outlet of the liquid storage tank is communicated with a medium-pressure air supplement port of the compressor through an air supplement solenoid valve, a liquid outlet of the liquid storage tank is communicated with the indoor heat exchanger through a second electronic expansion valve, and a refrigerant is poured into the air conditioning system according to the length standard of a maximum connecting pipe; the control device includes:
the optimal supercooling degree determining module is used for determining an optimal supercooling degree range TL 1-TL 2 for the operation of the air-conditioning system;
the current supercooling degree obtaining module is used for obtaining the current supercooling degree TL of the air conditioning system;
the judgment module is used for determining whether the refrigerant circulation quantity in the air-conditioning system meets the operation requirement or not according to the comparison result of the current supercooling degree TL and the optimal supercooling degree range TL 1-TL 2;
and the execution module is used for controlling the air replenishing electromagnetic valve to be opened when the circulating quantity of the refrigerant in the air conditioning system does not meet the operation requirement, and adjusting the opening degrees of the first electronic expansion valve and the second expansion valve to increase or decrease the circulating quantity of the refrigerant until the circulating quantity of the refrigerant meets the operation requirement.
The purpose of the present disclosure and the technical problems solved thereby can be further achieved by the following technical measures.
In some embodiments, the execution module is further to:
when it is judged that the refrigerant circulation amount is excessive,
in a cooling mode, increasing the opening degree of the first electronic expansion valve and decreasing the opening degree of the second electronic expansion valve;
in the heating mode, the opening degree of the first electronic expansion valve is reduced, and the opening degree of the second electronic expansion valve is increased;
and/or the presence of a gas in the gas,
when it is judged that the refrigerant circulation amount is insufficient,
in the cooling mode, the opening degree of the first electronic expansion valve is reduced, and the opening degree of the second electronic expansion valve is increased;
in the heating mode, the opening degree of the first electronic expansion valve is increased, and the opening degree of the second electronic expansion valve is decreased.
In some embodiments, the determining module is further configured to:
when TL is less than TL1, judging that the circulating quantity of the refrigerant is insufficient;
when TL1 is not less than TL2, judging that the refrigerant circulation quantity meets the operation requirement;
when TL > TL2, it is judged that the refrigerant circulation amount is excessive.
In some embodiments, the current supercooling degree obtaining module is further configured to:
detecting the discharge pressure P of the compressor and the outlet temperature T1 of the outdoor heat exchanger in a refrigeration mode, and calculating the current supercooling degree TL according to the discharge pressure P and the outlet temperature T1;
and/or the presence of a gas in the gas,
and under the heating mode, detecting the discharge pressure P of the compressor and the outlet temperature T2 of the indoor heat exchanger, and calculating the current supercooling degree TL according to the discharge pressure P and the outlet temperature T2.
In some embodiments, the optimal subcooling degree determining module is further configured to:
and obtaining the indoor ambient temperature Tn and the outdoor ambient temperature Tw, and determining the optimal supercooling degree range TL 1-TL 2 of the air conditioning system running at the current ambient temperature according to the indoor ambient temperature Tn and the outdoor ambient temperature Tw.
A computer-readable storage medium, having stored thereon a computer program which, when executed by a processor, implements the steps of the above-described air conditioning system control method.
An air conditioning system comprises a processor, a memory and a computer program which is stored on the memory and can run on the processor, wherein the processor executes the program to realize the steps of the air conditioning system control method.
An air conditioning system comprises the air conditioning system control device.
The air conditioning system control method, the air conditioning system control device, the storage medium and the air conditioning system provided by the disclosure at least have the following beneficial effects:
the air conditioning system control method disclosed by the invention can intelligently regulate and control the circulation amount of the refrigerant in the system according to the refrigerant filling amount of the maximum connecting pipe length standard, so that the circulation amount of the refrigerant always meets the operation requirement of the system, and the system can continuously, safely and efficiently operate, thereby avoiding the problem that the refrigerant is additionally added into the system according to the stage requirement during the after-sale debugging of the air conditioning system or the refrigerant adding amount cannot be accurately controlled, improving the installation efficiency of the air conditioning system, reducing the after-sale problem, and ensuring the performance of the air conditioning system and the reliability of a compressor.
Drawings
FIG. 1 is a schematic flow chart of a control method according to an embodiment of the disclosure;
FIG. 2 is a schematic flow chart of a control method according to another embodiment of the present disclosure;
FIG. 3 is a schematic structural diagram of a control device according to an embodiment of the disclosure;
fig. 4 is a schematic structural diagram of an air conditioning system according to an embodiment of the present disclosure.
The reference numerals are represented as:
1. a compressor; 2. a four-way valve; 3. an outdoor heat exchanger; 4. an outdoor fan; 5. a first filter; 6. a first electronic expansion valve; 7. a liquid storage tank; 8. a second electronic expansion valve; 9. a filter; 10. a first shut-off valve; 11. an indoor heat exchanger; 12. an indoor fan; 13. a second stop valve; 14. a gas-liquid separator; 15. a gas replenishing electromagnetic valve; 16. an exhaust temperature sensing bulb; 17. a temperature sensing bulb of the outdoor heat exchanger; 18. an outdoor environment temperature sensing bulb; 19. an outlet temperature sensing bulb of the outdoor heat exchanger; 20. a temperature sensing bulb of an indoor heat exchanger; 21. an indoor environment temperature sensing bulb; 22. an outlet temperature sensing bulb of the indoor heat exchanger; 23. a gas-suction temperature sensing bulb; 24. a high voltage switch; 25. a first pressure sensor; 26. a low voltage switch; 27. a second pressure sensor.
Detailed Description
To make the objects, technical solutions and advantages of the present disclosure more apparent, the following embodiments of the present disclosure will be clearly and completely described in conjunction with the accompanying drawings. It is to be understood that the described embodiments are merely a subset of the disclosed embodiments and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments disclosed herein without making any creative effort, shall fall within the protection scope of the present disclosure.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
With reference to fig. 1, 2 and 4, the present disclosure provides a control method for an air conditioning system, where the air conditioning system includes a compressor 1, a four-way valve 2, an outdoor heat exchanger 3, an indoor heat exchanger 11 and a liquid storage tank 7, where the liquid storage tank 7 is a three-pipe liquid storage tank, an inlet of the liquid storage tank 7 is communicated with an outlet of the outdoor heat exchanger 3 through a first electronic expansion valve 6, a gaseous outlet of the liquid storage tank 7 is communicated with a medium-pressure air supplement port of the compressor 1 through an air supplement solenoid valve 15, a liquid outlet of the liquid storage tank 7 is communicated with the indoor heat exchanger 11 through a second electronic expansion valve 8, and a refrigerant is poured into the air conditioning system according to a maximum connection pipe length standard;
the air conditioning system also comprises a gas-liquid separator 14, an exhaust temperature sensing bulb 16, a high-pressure switch 24 and a first pressure sensor 25 are arranged at an exhaust port of the compressor 1, the outdoor heat exchanger 3 is provided with an outdoor heat exchanger temperature sensing bulb 17 and an outdoor fan 4, an outdoor heat exchanger outlet temperature sensing bulb 19 is arranged at the outlet of the outdoor heat exchanger 3, a first filter 5 is arranged between the liquid storage tank 7 and the outdoor heat exchanger 3, a second filter 9 and a first stop valve 10 are arranged between the liquid storage tank 7 and the indoor heat exchanger 11, the indoor heat exchanger 11 is provided with an indoor heat exchanger temperature sensing bulb 20, an indoor heat exchanger outlet temperature sensing bulb 22 is arranged at the outlet of the indoor heat exchanger 11, the indoor heat exchanger 11 is communicated with the four-way valve 2 through a second stop valve 13, an air suction temperature sensing bulb 23, a low-pressure switch 26 and a second pressure sensor 27 are arranged at the inlet of the gas-liquid separator.
The air conditioning system is split, when the product is produced and leaves a factory, the outdoor unit of the air conditioner fills the refrigerant according to the refrigerant amount of the maximum connecting pipe length specified by the product, and after-sale debugging and installation personnel do not need to additionally add the refrigerant to the system.
The control method comprises the following steps:
s100, determining an optimal supercooling degree range TL 1-TL 2 for the operation of the air-conditioning system;
in some embodiments, the step of determining the optimal supercooling degree range TL 1-TL 2 for the operation of the air conditioning system includes:
and obtaining the indoor ambient temperature Tn and the outdoor ambient temperature Tw, and determining the optimal supercooling degree range TL 1-TL 2 of the air conditioning system running at the current ambient temperature according to the indoor ambient temperature Tn and the outdoor ambient temperature Tw.
In this embodiment, since the refrigerant amount in the air conditioning system is filled according to the maximum length of the connecting pipe, in the actual operation of the air conditioning system, the actually required refrigerant circulation amount is equal to the actually filled amount when the refrigerant circulation amount is maximum, and in the low-power operation of the air conditioning system, the refrigerant circulation amount in the control system needs to be smaller than the actually filled amount, so as to avoid the problems of over-high pressure, air suction, liquid entrainment and the like. Whether the circulating quantity of the refrigerant in the air-conditioning system meets the operation requirement or not is judged, and the optimal supercooling degree range of the air-conditioning system can be determined by acquiring the indoor and outdoor environment temperature, and the optimal supercooling degree can accurately reflect whether the circulating quantity of the refrigerant in the air-conditioning system meets the operation requirement or not.
S200, acquiring the current supercooling degree TL of the air conditioning system;
in some embodiments, the step of obtaining the current supercooling degree TL of the air conditioning system includes:
detecting the discharge pressure P of the compressor and the outlet temperature T1 of the outdoor heat exchanger in a refrigeration mode, and calculating the current supercooling degree TL according to the discharge pressure P and the outlet temperature T1;
and/or the presence of a gas in the gas,
and under the heating mode, detecting the discharge pressure P of the compressor and the outlet temperature T2 of the indoor heat exchanger, and calculating the current supercooling degree TL according to the discharge pressure P and the outlet temperature T2.
In the embodiment, the difference of calculation modes of the actual supercooling degree in the air conditioning system in the refrigeration and heating modes is considered, and the current supercooling degree is respectively calculated according to the difference of working modes of the air conditioning system, so that the accuracy of the current supercooling degree of the air conditioning system is ensured.
S300, determining whether the refrigerant circulation quantity in the air-conditioning system meets the operation requirement or not according to the comparison result of the current supercooling degree TL and the optimal supercooling degree range TL 1-TL 2;
in some embodiments, the step of determining whether the circulation amount of the refrigerant in the air conditioning system is appropriate according to the comparison result between the current supercooling degree TL and the optimal supercooling degree range TL 1-TL 2 includes:
when TL is less than TL1, judging that the circulating quantity of the refrigerant is insufficient;
when TL1 is not less than TL2, judging that the refrigerant circulation quantity meets the operation requirement;
when TL > TL2, it is judged that the refrigerant circulation amount is excessive.
In this embodiment, by determining a comparison result between the current supercooling degree of the air conditioning system and the optimal supercooling degree range of the air conditioning system at the current ambient temperature, it can be quickly determined whether the refrigerant circulation amount inside the air conditioning system meets the operation requirement, the refrigerant circulation amount is insufficient, or the refrigerant circulation amount is excessive.
And S400, if the circulation quantity of the refrigerant in the air-conditioning system is judged not to meet the operation requirement, controlling the air replenishing electromagnetic valve to be opened, and adjusting the opening degrees of the first electronic expansion valve and the second expansion valve to increase or decrease the circulation quantity of the refrigerant until the circulation quantity of the refrigerant meets the operation requirement.
In some embodiments, if it is determined that the refrigerant circulation amount in the air conditioning system does not meet the operation requirement, the step of controlling the gas supplementing solenoid valve to open and adjusting the opening degrees of the first electronic expansion valve and the second expansion valve to increase or decrease the refrigerant circulation amount until the refrigerant circulation amount meets the operation requirement includes:
when it is judged that the refrigerant circulation amount is excessive,
in a cooling mode, increasing the opening degree of the first electronic expansion valve and decreasing the opening degree of the second electronic expansion valve;
in the heating mode, the opening degree of the first electronic expansion valve is reduced, and the opening degree of the second electronic expansion valve is increased;
and/or the presence of a gas in the gas,
when it is judged that the refrigerant circulation amount is insufficient,
in the cooling mode, the opening degree of the first electronic expansion valve is reduced, and the opening degree of the second electronic expansion valve is increased;
in the heating mode, the opening degree of the first electronic expansion valve is increased, and the opening degree of the second electronic expansion valve is decreased.
In this embodiment, the amount of the refrigerant remaining in the liquid storage tank can be controlled by controlling the air supply solenoid valve, the first electronic expansion valve and the second electronic expansion valve, and the circulation amount of the refrigerant in the air conditioning system is correspondingly controlled, so that the air conditioning system is ensured to operate safely and efficiently under the condition that the circulation amount of the refrigerant meets the operation requirement.
According to the air conditioning system control method, the liquid storage tank 7 can prevent excessive refrigerant from directly influencing the performance of the compressor and preventing liquid impact on the compressor 1, the operating supercooling degree is judged in real time according to the ambient temperature, so that the refrigerant quantity in the liquid storage tank 7 is adjusted, the refrigerant circulating quantity in the system can be intelligently adjusted and controlled, the refrigerant circulating quantity can always meet the operating requirement of the system, and the air conditioning system can continuously, safely and efficiently operate, so that the problem that the refrigerant is additionally added into the system according to the stage requirement in the after-sale debugging of the air conditioning system or the refrigerant adding quantity cannot be accurately controlled is solved, the installation efficiency of the air conditioning system is improved, the after-sale problem is reduced, and the performance of the air conditioning system and the reliability of the compressor are ensured.
As shown in fig. 3 and 4, the embodiment further provides an air conditioning system control device, the air conditioning system includes a compressor 1, a four-way valve 2, an outdoor heat exchanger 3, an indoor heat exchanger 11, and a liquid storage tank 7, the liquid storage tank 7 is a three-pipe liquid storage tank, so as to prevent a large amount of refrigerant from directly affecting the performance of the compressor and from causing liquid impact on the compressor, an inlet of the liquid storage tank 7 is communicated with an outlet of the outdoor heat exchanger 3 through a first electronic expansion valve 6, a gas outlet of the liquid storage tank 7 is communicated with a medium-pressure gas supplementing port of the compressor 1 through a gas supplementing electromagnetic valve 15, a liquid outlet of the liquid storage tank 7 is communicated with the indoor heat exchanger 11 through a second electronic expansion valve 8, and the refrigerant is poured into the air conditioning system according to the maximum connection pipe length standard;
the air conditioning system also comprises a gas-liquid separator 14, an exhaust temperature sensing bulb 16, a high-pressure switch 24 and a first pressure sensor 25 are arranged at an exhaust port of the compressor 1, the outdoor heat exchanger 3 is provided with an outdoor heat exchanger temperature sensing bulb 17 and an outdoor fan 4, an outdoor heat exchanger outlet temperature sensing bulb 19 is arranged at the outlet of the outdoor heat exchanger 3, a first filter 5 is arranged between the liquid storage tank 7 and the outdoor heat exchanger 3, a second filter 9 and a first stop valve 10 are arranged between the liquid storage tank 7 and the indoor heat exchanger 11, the indoor heat exchanger 11 is provided with an indoor heat exchanger temperature sensing bulb 20, an indoor heat exchanger outlet temperature sensing bulb 22 is arranged at the outlet of the indoor heat exchanger 11, the indoor heat exchanger 11 is communicated with the four-way valve 2 through a second stop valve 13, an air suction temperature sensing bulb 23, a low-pressure switch 26 and a second pressure sensor 27 are arranged at the inlet of the gas-liquid separator.
The control device includes:
the optimal supercooling degree determining module 100 is used for determining an optimal supercooling degree range TL 1-TL 2 for the operation of the air conditioning system;
in some embodiments, the optimal subcooling degree determining module 100 is further configured to:
and obtaining the indoor ambient temperature Tn and the outdoor ambient temperature Tw, and determining the optimal supercooling degree range TL 1-TL 2 of the air conditioning system running at the current ambient temperature according to the indoor ambient temperature Tn and the outdoor ambient temperature Tw.
In this embodiment, since the refrigerant amount in the air conditioning system is filled according to the maximum length of the connecting pipe, in the actual operation of the air conditioning system, the actually required refrigerant circulation amount is equal to the actually filled amount when the refrigerant circulation amount is maximum, and in the low-power operation of the air conditioning system, the refrigerant circulation amount in the control system needs to be smaller than the actually filled amount, so as to avoid the problems of over-high pressure, air suction, liquid entrainment and the like. Whether the circulating quantity of the refrigerant in the air-conditioning system meets the operation requirement or not is judged, and the optimal supercooling degree range of the air-conditioning system can be determined by acquiring the indoor and outdoor environment temperature, and the optimal supercooling degree can accurately reflect whether the circulating quantity of the refrigerant in the air-conditioning system meets the operation requirement or not.
The current supercooling degree obtaining module 200 is used for obtaining the current supercooling degree TL of the air conditioning system;
in some embodiments, the current supercooling degree obtaining module 200 is further configured to:
detecting the discharge pressure P of the compressor and the outlet temperature T1 of the outdoor heat exchanger in a refrigeration mode, and calculating the current supercooling degree TL according to the discharge pressure P and the outlet temperature T1;
and/or the presence of a gas in the gas,
and under the heating mode, detecting the discharge pressure P of the compressor and the outlet temperature T2 of the indoor heat exchanger, and calculating the current supercooling degree TL according to the discharge pressure P and the outlet temperature T2.
In the embodiment, the difference of calculation modes of the actual supercooling degree in the air conditioning system in the refrigeration and heating modes is considered, and the current supercooling degree is respectively calculated according to the difference of working modes of the air conditioning system, so that the accuracy of the current supercooling degree of the air conditioning system is ensured.
The judgment module 300 is used for determining whether the refrigerant circulation volume in the air-conditioning system meets the operation requirement or not according to the comparison result of the current supercooling degree TL and the optimal supercooling degree range TL 1-TL 2;
in some embodiments, the determining module is further configured to:
when TL is less than TL1, judging that the circulating quantity of the refrigerant is insufficient;
when TL1 is not less than TL2, judging that the refrigerant circulation quantity meets the operation requirement;
when TL > TL2, it is judged that the refrigerant circulation amount is excessive.
In this embodiment, the determination module 300 determines the result of comparing the current supercooling degree of the air conditioning system with the optimal supercooling degree range of the air conditioning system at the current ambient temperature, and can quickly determine whether the refrigerant circulation amount inside the air conditioning system meets the operation requirement, is insufficient, or is too much.
And the execution module 400 is configured to control the air make-up solenoid valve to open when the refrigerant circulation volume in the air conditioning system does not meet the operation requirement, and adjust the opening degrees of the first electronic expansion valve and the second expansion valve to increase or decrease the refrigerant circulation volume until the refrigerant circulation volume meets the operation requirement.
In some embodiments, the execution module 400 is further configured to:
when it is judged that the refrigerant circulation amount is excessive,
in the cooling mode, the opening degree of the first electronic expansion valve 6 is increased, and the opening degree of the second electronic expansion valve 7 is decreased;
in the heating mode, the opening degree of the first electronic expansion valve 6 is decreased, and the opening degree of the second electronic expansion valve 8 is increased;
and/or the presence of a gas in the gas,
when it is judged that the refrigerant circulation amount is insufficient,
in the cooling mode, the opening degree of the first electronic expansion valve 6 is decreased, and the opening degree of the second electronic expansion valve 8 is increased;
in the heating mode, the opening degree of the first electronic expansion valve 6 is increased, and the opening degree of the second electronic expansion valve 8 is decreased.
In this embodiment, the execution module 400 controls the air supply solenoid valve 15, the first electronic expansion valve 6, and the second electronic expansion valve 8, so as to control the amount of the refrigerant retained in the liquid storage tank 7, and correspondingly control the circulation amount of the refrigerant in the air conditioning system, thereby ensuring that the air conditioning system operates safely and efficiently under the condition of meeting the refrigerant circulation amount required by operation.
A computer-readable storage medium, having stored thereon a computer program which, when executed by a processor, implements the steps of the above-described air conditioning system control method.
An air conditioning system comprises a processor, a memory and a computer program which is stored on the memory and can run on the processor, wherein the processor executes the program to realize the steps of the air conditioning system control method.
An air conditioning system comprises the air conditioning system control device.
Therefore, according to the scheme provided by the disclosure, the air conditioning system with the refrigerant filling amount according to the maximum connecting pipe length standard can intelligently regulate and control the refrigerant circulation amount in the system, so that the refrigerant circulation amount always meets the operation requirement of the system, and the system can continuously, safely and efficiently operate, thereby avoiding the problem that the refrigerant is additionally added into the system according to the stage requirement during the after-sale debugging of the air conditioning system or the refrigerant adding amount cannot be accurately controlled, improving the installation efficiency of the air conditioning system, reducing the after-sale problem, and ensuring the performance of the air conditioning system and the reliability of the compressor.
The functions described herein may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Other examples and implementations are within the scope and spirit of the invention and the following claims. For example, due to the nature of software, the functions described above may be implemented using software executed by a processor, hardware, firmware, hardwired, or a combination of any of these. In addition, each functional unit may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.
In the embodiments provided in the present application, it should be understood that the disclosed technology can be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units may be a logical division, and in actual implementation, there may be another division, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, units or modules, and may be in an electrical or other form.
The units described as separate parts may or may not be physically separate, and the parts serving as the control device may or may not be physical units, may be located in one place, or may be distributed on a plurality of units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic or optical disk, and other various media capable of storing program codes.
The above description is only an example of the present invention, and is not intended to limit the present invention, and it is obvious to those skilled in the art that various modifications and variations can be made in the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.
Claims (13)
1. The control method of the air conditioning system is characterized in that the air conditioning system comprises a compressor, a four-way valve, an outdoor heat exchanger, an indoor heat exchanger and a liquid storage tank, wherein an inlet of the liquid storage tank is communicated with an outlet of the outdoor heat exchanger through a first electronic expansion valve, a gas outlet of the liquid storage tank is communicated with a medium-pressure air supplementing port of the compressor through an air supplementing electromagnetic valve, a liquid outlet of the liquid storage tank is communicated with the indoor heat exchanger through a second electronic expansion valve, and a refrigerant is poured into the air conditioning system according to the length standard of a maximum connecting pipe; the control method comprises the following steps:
determining an optimal supercooling degree range TL 1-TL 2 for the operation of the air-conditioning system;
acquiring the current supercooling degree TL of the air-conditioning system;
determining whether the refrigerant circulation volume in the air-conditioning system meets the operation requirement or not according to the comparison result of the current supercooling degree TL and the optimal supercooling degree range TL 1-TL 2;
and if the circulating quantity of the refrigerant in the air conditioning system does not meet the operation requirement, controlling the air replenishing electromagnetic valve to be opened, and adjusting the opening degrees of the first electronic expansion valve and the second expansion valve to increase or decrease the circulating quantity of the refrigerant until the circulating quantity of the refrigerant meets the operation requirement.
2. The method as claimed in claim 1, wherein if it is determined that the refrigerant circulation amount in the air conditioning system does not satisfy the operation requirement, the step of controlling the air make-up solenoid valve to open and adjusting the opening degrees of the first electronic expansion valve and the second expansion valve to increase or decrease the refrigerant circulation amount until the refrigerant circulation amount satisfies the operation requirement comprises:
when it is judged that the refrigerant circulation amount is excessive,
in a cooling mode, increasing the opening degree of the first electronic expansion valve and decreasing the opening degree of the second electronic expansion valve;
in the heating mode, the opening degree of the first electronic expansion valve is reduced, and the opening degree of the second electronic expansion valve is increased;
and/or the presence of a gas in the gas,
when it is judged that the refrigerant circulation amount is insufficient,
in the cooling mode, the opening degree of the first electronic expansion valve is reduced, and the opening degree of the second electronic expansion valve is increased;
in the heating mode, the opening degree of the first electronic expansion valve is increased, and the opening degree of the second electronic expansion valve is decreased.
3. The air conditioning system control method according to claim 1, wherein the step of determining whether the circulation amount of the refrigerant in the air conditioning system is appropriate according to the comparison result between the current supercooling degree TL and the optimal supercooling degree range TL 1-TL 2 comprises:
when TL is less than TL1, judging that the circulating quantity of the refrigerant is insufficient;
when TL1 is not less than TL2, judging that the refrigerant circulation quantity meets the operation requirement;
when TL > TL2, it is judged that the refrigerant circulation amount is excessive.
4. The air conditioning system control method according to claim 1, wherein the step of obtaining the current supercooling degree TL of the air conditioning system comprises:
detecting the discharge pressure P of the compressor and the outlet temperature T1 of the outdoor heat exchanger in a refrigeration mode, and calculating the current supercooling degree TL according to the discharge pressure P and the outlet temperature T1;
and/or the presence of a gas in the gas,
and under the heating mode, detecting the discharge pressure P of the compressor and the outlet temperature T2 of the indoor heat exchanger, and calculating the current supercooling degree TL according to the discharge pressure P and the outlet temperature T2.
5. The air conditioning system control method according to claim 1, wherein the step of determining the optimal supercooling degree range TL 1-TL 2 for the operation of the air conditioning system comprises:
and obtaining the indoor ambient temperature Tn and the outdoor ambient temperature Tw, and determining the optimal supercooling degree range TL 1-TL 2 of the air conditioning system running at the current ambient temperature according to the indoor ambient temperature Tn and the outdoor ambient temperature Tw.
6. The control device of the air conditioning system is characterized in that the air conditioning system comprises a compressor, a four-way valve, an outdoor heat exchanger, an indoor heat exchanger and a liquid storage tank, wherein an inlet of the liquid storage tank is communicated with an outlet of the outdoor heat exchanger through a first electronic expansion valve, a gas outlet of the liquid storage tank is communicated with a medium-pressure air supplement port of the compressor through an air supplement solenoid valve, a liquid outlet of the liquid storage tank is communicated with the indoor heat exchanger through a second electronic expansion valve, and a refrigerant is poured into the air conditioning system according to the length standard of a maximum connecting pipe; the control device includes:
the optimal supercooling degree determining module is used for determining an optimal supercooling degree range TL 1-TL 2 for the operation of the air-conditioning system;
the current supercooling degree obtaining module is used for obtaining the current supercooling degree TL of the air conditioning system;
the judgment module is used for determining whether the refrigerant circulation quantity in the air-conditioning system meets the operation requirement or not according to the comparison result of the current supercooling degree TL and the optimal supercooling degree range TL 1-TL 2;
and the execution module is used for controlling the air replenishing electromagnetic valve to be opened when the circulating quantity of the refrigerant in the air conditioning system does not meet the operation requirement, and adjusting the opening degrees of the first electronic expansion valve and the second expansion valve to increase or decrease the circulating quantity of the refrigerant until the circulating quantity of the refrigerant meets the operation requirement.
7. The air conditioning system control device according to claim 6, wherein the execution module is further configured to:
when it is judged that the refrigerant circulation amount is excessive,
in the cooling mode, the opening degree of the first electronic expansion valve is increased, and the opening degree of the second electronic expansion valve is decreased;
in the heating mode, the opening degree of the first electronic expansion valve is reduced, and the opening degree of the second electronic expansion valve is increased;
and/or the presence of a gas in the gas,
when it is judged that the refrigerant circulation amount is insufficient,
in the cooling mode, the opening degree of the first electronic expansion valve is reduced, and the opening degree of the second electronic expansion valve is increased;
in the heating mode, the opening degree of the first electronic expansion valve is increased, and the opening degree of the second electronic expansion valve is decreased.
8. The air conditioning system control device according to claim 6, wherein the determining module is further configured to:
when TL is less than TL1, judging that the circulating quantity of the refrigerant is insufficient;
when TL1 is not less than TL2, judging that the refrigerant circulation quantity meets the operation requirement;
when TL > TL2, it is judged that the refrigerant circulation amount is excessive.
9. The air conditioning system control device according to claim 6, wherein the current supercooling degree obtaining module is further configured to:
detecting the discharge pressure P of the compressor and the outlet temperature T1 of the outdoor heat exchanger in a refrigeration mode, and calculating the current supercooling degree TL according to the discharge pressure P and the outlet temperature T1;
and/or the presence of a gas in the gas,
and under the heating mode, detecting the discharge pressure P of the compressor and the outlet temperature T2 of the indoor heat exchanger, and calculating the current supercooling degree TL according to the discharge pressure P and the outlet temperature T2.
10. The air conditioning system control device according to claim 6, wherein the optimal supercooling degree determination module is further configured to:
and obtaining the indoor ambient temperature Tn and the outdoor ambient temperature Tw, and determining the optimal supercooling degree range TL 1-TL 2 of the air conditioning system running at the current ambient temperature according to the indoor ambient temperature Tn and the outdoor ambient temperature Tw.
11. A computer-readable storage medium, having stored thereon a computer program which, when executed by a processor, carries out the steps of the air conditioning system control method according to any one of claims 1 to 5.
12. An air conditioning system comprising a processor, a memory, and a computer program stored in the memory and operable on the processor, wherein the processor implements the steps of the air conditioning system control method of any of claims 1-5 when executing the program.
13. An air conditioning system characterized by comprising the air conditioning system control device according to any one of claims 6 to 10.
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