CN110068103B - Refrigerant quantity judging method and control method - Google Patents
Refrigerant quantity judging method and control method Download PDFInfo
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- CN110068103B CN110068103B CN201910356546.3A CN201910356546A CN110068103B CN 110068103 B CN110068103 B CN 110068103B CN 201910356546 A CN201910356546 A CN 201910356546A CN 110068103 B CN110068103 B CN 110068103B
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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
- F24F11/49—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring ensuring correct operation, e.g. by trial operation or configuration checks
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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
- F24F11/70—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
- F24F2140/00—Control inputs relating to system states
- F24F2140/10—Pressure
- F24F2140/12—Heat-exchange fluid pressure
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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
Abstract
The invention provides a refrigerant quantity judging method and a control method, and relates to the technical field of air conditioners. The refrigerant quantity judging method is applied to an air conditioner heating system and comprises the following steps: receiving an indoor air outlet temperature parameter, an indoor electronic expansion valve supercooling degree parameter and at least two auxiliary judgment parameters; the auxiliary judgment parameters are used for representing the exhaust state and/or the suction state of the air conditioner and/or the state of the outer machine electronic expansion valve. And judging the state of the refrigerant quantity of the air conditioner according to the indoor air outlet temperature parameter, the supercooling degree parameter of the indoor unit electronic expansion valve and at least two auxiliary judgment parameters. Whether the refrigerant quantity is proper or not is comprehensively judged according to a plurality of parameters, the precision is high, the efficiency of debugging the refrigerant quantity of the air conditioner is improved, and the debugging effect is improved.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to a refrigerant quantity judgment method and a control method.
Background
In the development and debugging stage of the air conditioner, the adjustment of the refrigerant quantity in the prior art generally adopts a mode of firstly setting a certain refrigerant quantity for a system, then judging whether the refrigerant quantity is proper according to each parameter after the unit operates, if so, discharging a part of the refrigerant, and if not, refilling the refrigerant. In the process, whether the refrigerant quantity is proper or not has great influence on the debugging result of the debugging efficiency.
Disclosure of Invention
The invention solves the problem that the refrigerant quantity judgment precision is not high enough in the prior art.
In order to solve the above problems, the present invention provides a refrigerant quantity determination method applied to a heating system of an air conditioner, the refrigerant quantity determination method comprising:
receiving an indoor air outlet temperature parameter, an indoor electronic expansion valve supercooling degree parameter and at least two auxiliary judgment parameters; the auxiliary judgment parameters are used for representing the exhaust state and/or the suction state of the air conditioner and/or the state of an electronic expansion valve of an outdoor unit;
and judging the state of the refrigerant quantity of the air conditioner according to the indoor air outlet temperature parameter, the supercooling degree parameter of the indoor unit electronic expansion valve and at least two auxiliary judgment parameters.
The refrigerant quantity judging method provided by the embodiment of the invention selects the typical parameter (indoor air-out temperature parameter) which can best indicate that the refrigerant quantity is insufficient in the heating process of the air conditioner to combine with a plurality of typical parameters (indoor air-out temperature parameter and auxiliary judging parameter) which can indicate that the refrigerant quantity is insufficient to comprehensively judge whether the refrigerant quantity is insufficient, and simultaneously selects the typical parameter (indoor electronic expansion valve supercooling degree parameter) which can most indicate that the refrigerant quantity is excessive in the heating process of the air conditioner to combine with a plurality of typical parameters (indoor air-out temperature parameter and auxiliary judging parameter) which can indicate that the refrigerant quantity is insufficient to comprehensively judge whether the refrigerant quantity is excessive.
Further, the step of determining that the refrigerant quantity of the air conditioner is insufficient according to the indoor outlet air temperature parameter and the at least two auxiliary determination parameters includes:
and when the indoor air outlet temperature parameter is in the corresponding insufficient interval, and the supercooling degree parameter of the indoor electronic expansion valve and at least two of the at least two auxiliary judgment parameters are in the corresponding insufficient interval respectively, judging that the refrigerant quantity of the air conditioner is insufficient.
Further, the auxiliary judgment parameter is a temperature parameter, a pressure parameter, a superheat degree parameter or an opening degree parameter of the electronic expansion valve; the temperature parameter is used for representing the exhaust temperature of the air conditioner, the pressure parameter is used for representing the exhaust pressure or the suction pressure of a system, and the superheat degree parameter is used for representing the suction superheat degree of a compressor or the superheat degree of an outer machine electronic expansion valve;
the refrigerant quantity judging method comprises the following steps:
and when the indoor air outlet temperature parameter is in the corresponding insufficient interval, and at least two of the supercooling degree parameter, the temperature parameter, the pressure parameter, the superheat degree parameter and the opening degree parameter of the electronic expansion valve of the indoor unit are in the corresponding insufficient interval respectively, judging that the refrigerant quantity of the air conditioner is insufficient.
Further, the step of determining the refrigerant quantity excess of the air conditioner according to the supercooling degree parameter of the indoor unit electronic expansion valve and at least two auxiliary determination parameters comprises the following steps:
and when the supercooling degree parameter of the internal machine electronic expansion valve is in the corresponding excess interval, and the indoor air outlet temperature parameter and at least two of the at least two auxiliary judgment parameters are in the corresponding excess intervals respectively, judging that the refrigerant quantity of the air conditioner is excess.
Further, the auxiliary judgment parameter is a temperature parameter, a pressure parameter, a superheat degree parameter or an opening degree parameter of the electronic expansion valve; the temperature parameter is used for representing the exhaust temperature of the air conditioner, the pressure parameter is used for representing the exhaust pressure or the suction pressure of a system, and the superheat degree parameter is used for representing the suction superheat degree of a compressor or the superheat degree of an outer machine electronic expansion valve;
the refrigerant quantity judging method comprises the following steps:
and when the supercooling degree parameter of the internal machine electronic expansion valve is in the corresponding excess interval, and at least two of the indoor air outlet temperature parameter, the pressure parameter, the superheat degree parameter and the opening degree parameter of the electronic expansion valve are in the corresponding excess intervals respectively, judging that the refrigerant quantity of the air conditioner is excessive.
Further, the refrigerant quantity determination method further includes:
and when at least four of the indoor air outlet temperature parameter, the supercooling degree parameter of the internal machine electronic expansion valve and the at least two auxiliary judgment parameters are respectively in the corresponding qualified intervals, judging that the amount of the refrigerant of the air conditioner is proper.
The invention provides a refrigerant quantity control method, which is applied to an automatic heating control system of an air conditioner, wherein the automatic heating control system of the air conditioner comprises an air conditioner and a refrigerant quantity adjusting device, the air conditioner comprises a first pipeline for high-pressure fluid to pass through and a second pipeline for low-pressure fluid to pass through, and the refrigerant quantity adjusting device comprises a first liquid storage tank, a second liquid storage tank, a first electromagnetic valve and a second electromagnetic valve; the first liquid storage tank is connected with the first electromagnetic valve, the first electromagnetic valve is connected with the first pipeline, the second liquid storage tank is connected with the second electromagnetic valve, and the second electromagnetic valve is connected with the second pipeline;
the refrigerant quantity control method comprises the following steps:
judging the refrigerant quantity of the air conditioner, wherein the step of judging the refrigerant quantity of the air conditioner adopts the refrigerant quantity judging method;
under the condition that the quantity of the refrigerant is excessive, controlling the opening of a first electromagnetic valve to lead the excessive refrigerant in the first pipeline into a first liquid storage tank;
and under the condition of insufficient refrigerant quantity, controlling the opening of the second electromagnetic valve to lead the refrigerant in the second liquid storage tank to be led into the second pipeline.
Further, after the step of controlling the opening of the first solenoid valve to guide the excessive refrigerant in the first pipeline into the first liquid storage tank in the state that the refrigerant amount is excessive, the refrigerant amount control method further comprises the following steps:
receiving first liquid storage amount data of a first liquid storage tank;
and controlling the first electromagnetic valve to be closed under the condition that the first liquid storage data is larger than a first preset value.
Further, after the step of receiving first liquid storage amount data of the first liquid storage tank and controlling the first electromagnetic valve to be closed under the condition that the first liquid storage amount data is larger than the first preset value, the refrigerant amount control method further comprises the following steps of:
and continuing to execute the step of judging the refrigerant quantity of the air conditioner.
Further, after the step of controlling the opening of the second solenoid valve to guide the refrigerant in the second liquid storage tank to the second pipeline in the state that the refrigerant quantity is insufficient, the refrigerant quantity control method further comprises the following steps:
receiving second liquid storage amount data of a second liquid storage tank;
and controlling the second electromagnetic valve to be closed under the condition that the second liquid storage data is smaller than a second preset value.
Further, after the step of receiving second liquid storage amount data of the first liquid storage tank and controlling the second electromagnetic valve to be closed in a state that the second liquid storage amount data is smaller than a second preset value, the refrigerant amount control method further includes:
and continuing to execute the step of judging the refrigerant quantity of the air conditioner.
Drawings
Fig. 1 is a flow chart of a refrigerant quantity determination method according to an embodiment of the present invention.
Fig. 2 is a flow chart illustrating sub-steps of a refrigerant quantity determination method according to an embodiment of the present invention.
Fig. 3 is a block diagram of an automatic heating control system of an air conditioner according to an embodiment of the present invention.
Fig. 4 is a flow chart of a refrigerant quantity control method according to an embodiment of the present invention.
Description of reference numerals:
100-an automatic heating control system of an air conditioner; 110-an air conditioner; 112-an outdoor unit; 113-inner machine; 114-a first conduit; 115-a second conduit; 120-refrigerant quantity adjusting device; 121-a first reservoir; 122-a second reservoir; 123-a first solenoid valve; 124-second solenoid valve.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
Fig. 1 is a flow chart of a refrigerant quantity determination method according to this embodiment. Fig. 2 is a flow chart illustrating sub-steps of the refrigerant quantity determination method according to the present embodiment. Referring to fig. 1 and fig. 2, the present embodiment provides a method for determining a refrigerant quantity, which is mainly applied to a heating system of an air conditioner and is applied to debugging of the air conditioner. In the debugging process of the air conditioner, the state of the refrigerant quantity needs to be continuously judged for many times, and the excessive and insufficient refrigerant quantity of the air conditioner is just suitable, so that the use quality of the air conditioner after leaving a factory is related. The debugging process is different from the state of the refrigerant quantity in the using process of the air conditioner, so that the state of the refrigerant quantity is difficult to determine directly through simple parameter judgment.
The refrigerant quantity judging method provided by the embodiment is a multi-parameter comprehensive judging method, can accurately reflect the refrigerant quantity state of an air conditioner, and comprises the following steps of:
step S110: receiving an indoor air outlet temperature parameter, an indoor electronic expansion valve supercooling degree parameter and at least two auxiliary judgment parameters; wherein the auxiliary judgment parameter is used for representing one or more of the exhaust state, the suction state and the state of the outer machine electronic expansion valve of the air conditioner.
The indoor air-out temperature parameter is used as a necessary parameter for judging the insufficient refrigerant quantity of the air conditioner, the supercooling degree parameter of the internal electronic expansion valve is used as a necessary parameter for judging the refrigerant quantity of the air conditioner, and the rest of the indoor air-out temperature parameter, the supercooling degree parameter of the internal electronic expansion valve and at least two auxiliary judging parameters are used as comprehensive evaluation parameters for judging the insufficient refrigerant quantity and the excessive refrigerant quantity of the air conditioner.
It can be understood that, in this way, the accuracy of determination can be improved by separately determining the refrigerant shortage and the refrigerant excess.
In this embodiment, the auxiliary determination parameter may be a temperature parameter, a pressure parameter, a superheat parameter, or an electronic expansion valve opening degree parameter. The temperature parameter is used for representing the exhaust temperature of the air conditioner, the pressure parameter is used for representing the exhaust pressure or the suction pressure of the system, and the superheat degree parameter is used for representing the suction superheat degree of a compressor or the superheat degree of an outer machine electronic expansion valve.
Optionally, referring to fig. 2, the step S110 may include the following sub-steps:
step S112: and receiving indoor air outlet temperature parameters.
Step S113: receiving a temperature parameter, wherein the temperature parameter comprises an exhaust temperature parameter and/or an exhaust superheat parameter.
Step S114: receiving a pressure parameter, wherein the pressure parameter comprises a system exhaust pressure parameter and/or a system suction pressure parameter.
Step S115: and receiving a superheat parameter, wherein the superheat parameter comprises a suction superheat parameter of the compressor and/or a superheat parameter of the outer machine electronic expansion valve.
Step S116: and receiving the opening parameter of the electronic expansion valve of the outdoor unit.
Step S117: and receiving the supercooling degree parameter of the electronic expansion valve of the internal machine.
It should be understood that steps S112 to S117 do not indicate a sequential order, and that multiple sub-steps may be performed simultaneously, sequentially or randomly. Moreover, it should be noted that, in the same set of decision parameters, two parameters may be selected at the same time, or one of the two parameters may be selected. For example, in the temperature parameter, an exhaust temperature parameter and an exhaust superheat parameter may be selected at the same time, or only the exhaust temperature parameter or the exhaust superheat parameter may be selected.
In addition, under the national standard heating working condition (7 ℃/6 ℃ at the outer side and 20 ℃/15 ℃ at the inner side), the frequency range of the compressor is 65-75% (preferably 70%), the qualified ranges of the parameters are as follows:
exhaust temperature is 70-80 ℃ (preferably 75 ℃); the exhaust superheat degree is 25-35 ℃ (preferably 30 ℃);
the range of the system exhaust pressure is 2.8MPa to 3.2MPa (preferably 2.85 MPa); the range of the system suction pressure is 0.6Mpa to 0.8Mpa (preferably 0.7 Mpa);
thirdly, the air suction transition range of the compressor is 3-6 ℃ (preferably 4 ℃), and the superheat degree of the electronic expansion valve of the outdoor unit is 3-6 ℃ (preferably 4 ℃);
fourthly, the opening range of the electronic expansion valve of the outdoor unit is 120pls to 200pls (preferably 150 pls);
the supercooling degree of the electronic expansion valve of the indoor machine is 4-6 ℃ (preferably 5 ℃);
sixthly, the air outlet temperature in the heating chamber is 45-50 ℃ (preferably 48 ℃).
When the refrigerant quantity of the system is insufficient, the insufficient intervals corresponding to the parameters are as follows:
firstly, the exhaust temperature is higher than 80 ℃; the exhaust superheat degree is more than 35 ℃;
the exhaust pressure of the system is less than 2.8 Mpa; the system suction pressure is less than 0.6 Mpa;
thirdly, the air suction transition of the compressor is more than 6 ℃, and the superheat degree of the electronic expansion valve of the outer machine is more than 6 ℃;
opening degree of the electronic expansion valve of the outdoor unit is larger than 200 pls;
the supercooling degree of the electronic expansion valve of the indoor unit is less than 4 ℃;
and sixthly, the air outlet temperature in the heating room is less than 45 ℃.
When the refrigerant quantity of the system is excessive, the excessive interval corresponding to each parameter is as follows:
firstly, the exhaust temperature is less than 70 ℃; the exhaust superheat degree is less than 25 ℃;
the exhaust pressure of the system is more than 3.2 Mpa; the system suction pressure is more than 0.8 Mpa;
thirdly, the air suction transition of the compressor is less than 3 ℃, and the superheat degree of the electronic expansion valve of the outer machine is less than 3 ℃;
fourthly, the opening of the electronic expansion valve of the outdoor unit is less than 120 pls;
the supercooling degree of the electronic expansion valve of the indoor unit is more than 6 ℃;
and sixthly, the air outlet temperature in the heating room is more than 50 ℃.
The inventor finds that, in the heating process of the air conditioner, the refrigerant quantity is insufficient, the sensitivity of the indoor air-out temperature parameter is the highest, the refrigerant quantity is excessive, and the sensitivity of the supercooling degree parameter of the internal electronic expansion valve is the highest, so that in the embodiment, the indoor air-out temperature parameter is taken as a necessary parameter for judging that the refrigerant quantity of the air conditioner is insufficient, and the supercooling degree parameter of the internal electronic expansion valve is taken as a necessary parameter for judging that the refrigerant quantity of the air conditioner is insufficient.
The refrigerant quantity judging method also comprises the following steps:
step S120: and judging the state of the refrigerant quantity of the air conditioner according to the indoor air outlet temperature parameter, the supercooling degree parameter of the indoor unit electronic expansion valve and at least two auxiliary judgment parameters.
In this embodiment, the step S120 includes:
step S121: and when the indoor air outlet temperature parameter is in the corresponding insufficient interval, and at least two of the indoor unit electronic expansion valve supercooling degree parameter and the at least two auxiliary judgment parameters are in the corresponding insufficient interval respectively, judging that the refrigerant quantity of the air conditioner is insufficient.
That is, when the indoor outlet air temperature parameter is in the corresponding insufficient interval, and at least two of the indoor electronic expansion valve supercooling degree parameter, the temperature parameter, the pressure parameter, the superheat degree parameter and the electronic expansion valve opening degree parameter are in the corresponding insufficient interval, the refrigerant quantity of the air conditioner is judged to be insufficient.
Specifically, when the indoor outlet air temperature parameter is in the corresponding shortage interval, and the exhaust temperature parameter and/or the exhaust superheat parameter and the pressure parameter comprise/comprises a system exhaust pressure parameter and/or a system suction pressure parameter, a compressor suction superheat parameter and/or at least two of an outer machine electronic expansion valve superheat parameter, an outer machine electronic expansion valve opening parameter and an inner machine electronic expansion valve supercooling parameter are/is in the corresponding shortage interval, the refrigerant quantity of the air conditioner is judged to be insufficient.
When the indoor air outlet temperature parameter is adopted, the insufficient condition of the refrigerant quantity is comprehensively judged by selecting the supercooling degree parameter of the electronic expansion valve of the inner machine and the auxiliary judgment parameter, so that the judgment precision can be improved.
It should be understood that in alternative embodiments, other parameters may be used as the auxiliary decision parameter.
Step S122: and when the supercooling degree parameter of the internal machine electronic expansion valve is in the corresponding excess interval, and at least two of the indoor air outlet temperature parameter and the at least two auxiliary judgment parameters are in the corresponding excess interval respectively, judging that the refrigerant quantity of the air conditioner is excess.
That is, when the supercooling degree parameter of the internal electronic expansion valve is in the corresponding excess interval, and at least two of the indoor air-out temperature parameter, the pressure parameter, the superheat degree parameter and the opening degree parameter of the electronic expansion valve are in the corresponding excess intervals, the refrigerant amount excess of the air conditioner is determined.
Specifically, when the supercooling degree parameter of the indoor unit electronic expansion valve is in the corresponding excess interval, and the exhaust temperature parameter and/or the exhaust superheat parameter and the pressure parameter comprise/comprises a system exhaust pressure parameter and/or a system suction pressure parameter, a compressor suction superheat parameter and/or an outdoor unit electronic expansion valve superheat parameter, an outdoor unit electronic expansion valve superheat parameter and/or at least two of indoor air outlet temperature parameters are/is in the corresponding excess interval, the excess of the refrigerant quantity of the air conditioner is judged.
When the supercooling degree parameter of the internal machine electronic expansion valve is adopted, the insufficient condition of the refrigerant quantity is comprehensively judged by selecting the indoor air outlet temperature parameter and the auxiliary judgment parameter, so that the judgment precision can be improved.
Step S123: and when at least four of the indoor air outlet temperature parameter, the indoor electronic expansion valve supercooling degree parameter and the at least two auxiliary judgment parameters are respectively in the corresponding qualified intervals, judging that the amount of the refrigerant of the air conditioner is proper.
That is, when at least four of the indoor air outlet temperature parameter, the indoor electronic expansion valve supercooling degree parameter, the temperature parameter, the pressure parameter, the superheat degree parameter and the electronic expansion valve opening degree parameter are respectively in the corresponding qualified intervals, the proper amount of the refrigerant of the air conditioner is judged.
Specifically, when at least four of the indoor outlet air temperature parameter, the exhaust air temperature parameter and/or the exhaust superheat parameter and the pressure parameter comprise a system exhaust pressure parameter and/or a system suction pressure parameter, a compressor suction superheat parameter and/or an outdoor unit electronic expansion valve superheat parameter, an outdoor unit electronic expansion valve opening parameter and an indoor unit electronic expansion valve supercooling parameter are respectively in corresponding qualified intervals, the appropriate amount of the refrigerant of the air conditioner is judged.
It should be noted that, in this embodiment, the sequence of step S120, step S130 and step S140 is not distinguished.
It can be understood that, in the refrigerant quantity judging method provided in this embodiment, the typical parameter (indoor air outlet temperature parameter) most capable of indicating that the refrigerant quantity is insufficient in the heating process of the air conditioner is selected to combine with the plurality of typical parameters (indoor electronic expansion valve supercooling degree parameter, auxiliary judgment parameter) capable of indicating that the refrigerant quantity is insufficient to comprehensively judge whether the refrigerant quantity is insufficient, and meanwhile, the typical parameter (indoor electronic expansion valve supercooling degree parameter) most capable of indicating that the refrigerant quantity is excessive in the heating process of the air conditioner is selected to combine with the plurality of typical parameters (indoor air outlet temperature parameter, auxiliary judgment parameter) capable of indicating that the refrigerant quantity is insufficient to comprehensively judge whether the refrigerant quantity is excessive, so that the multi-parameter comprehensive judging method has high precision, and is beneficial to improving the efficiency of adjusting the refrigerant quantity of the air conditioner and improving the adjusting effect.
Fig. 3 is a block diagram of an automatic heating control system 100 of an air conditioner according to the refrigerant quantity control method of the present embodiment. Fig. 4 is a flow chart of a refrigerant quantity control method according to this embodiment. Referring to fig. 3, the present embodiment further provides a refrigerant quantity control method, which is applied to an automatic heating control system 100 of an air conditioner.
The automatic control system 100 for heating of an air conditioner includes an air conditioner 110 and a refrigerant amount adjusting device 120. The refrigerant quantity adjusting device 120 is used for inputting or outputting the refrigerant to or from the air conditioner 110 during the debugging stage of the air conditioner 110, so as to adjust the refrigerant quantity in the air conditioner 110.
It should be noted that the air conditioner 110 may be a multi-split air conditioner or a common single-indoor unit or single-outdoor unit air conditioner. Moreover, it should be understood that the refrigerant quantity control method includes, but is not limited to, commissioning of the factory stage of the air conditioner 110 and commissioning of the usage stage of the air conditioner 110.
Alternatively, in the present embodiment, the air conditioner 110 includes an outdoor unit 112 and a plurality of indoor units 113, and the outdoor unit 112 and the plurality of indoor units 113 are connected by a plurality of pipes, and it is understood that the pipes include a first pipe 114 through which high-pressure fluid passes and a second pipe 115 through which low-pressure fluid passes.
The refrigerant amount adjusting device 120 includes a first tank 121, a second tank 122, a first solenoid valve 123, and a second solenoid valve 124. The first reservoir tank 121 is connected to a first solenoid valve 123, the first solenoid valve 123 is connected to the first pipe 114, the second reservoir tank 122 is connected to a second solenoid valve 124, and the second solenoid valve 124 is connected to the second pipe 115.
It is understood that the controller of the air conditioner 110 may discharge the excessive refrigerant of the air conditioner 110 by controlling the opening of the first solenoid valve 123, and may inject the refrigerant of the air conditioner 110 by controlling the opening of the second solenoid valve 124.
It should be noted that the first tank 121 and the second tank 122 may be connected by a check valve to circulate the refrigerant of the heating automatic control system 100.
The refrigerant quantity control method comprises the following steps:
step S210: the amount of refrigerant in the air conditioner 110 is determined.
In this embodiment, the above-mentioned method for determining the amount of refrigerant can be adopted in the step S210.
That is, in the present embodiment, the refrigerant condition of the air conditioner 110 is first determined by using the refrigerant quantity determination method, and the refrigerant of the air conditioner 110 is excessive, insufficient, or appropriate.
Step S221: in the state of excessive refrigerant quantity, the first solenoid valve 123 is controlled to open, so that the excessive refrigerant in the first pipeline 114 is guided into the first accumulator 121.
Step S231: in the state of insufficient refrigerant quantity, the second solenoid valve 124 is controlled to open, so that the refrigerant in the second accumulator 122 is guided into the second pipeline 115.
It should be understood that, in order to enable the automatic control system for heating system 100 to automatically complete the best effect of refrigerant quantity adjustment, in this embodiment, after step S221, the method for controlling refrigerant quantity further includes:
step S222: first liquid storage amount data of the first liquid storage tank 121 is received.
Step S223: the first solenoid valve 123 is controlled to close in a state where the first stored-liquid data is greater than the first preset value.
It should be understood that the step of determining the amount of refrigerant of the air conditioner 110 should be continuously performed after the first solenoid valve 123 is closed.
Similarly, after step S231, the refrigerant quantity control method further includes:
step S232: second fluid reservoir data for the second fluid reservoir 122 is received.
Step S233: and controlling the second electromagnetic valve 124 to close in the state that the second liquid storage data is smaller than the second preset value.
It should be appreciated that the step of determining the amount of refrigerant in the air conditioner 110 is continuously performed after the second solenoid valve 124 is closed.
The refrigerant quantity control method also comprises the following steps:
step S240: and withdrawing under the state of proper amount of refrigerant.
That is, the debugging is terminated when it is determined that the refrigerant quantity of the air conditioner 110 is appropriate.
It can be understood that, by adopting the refrigerant quantity determination method, the refrigerant quantity control method provided in this embodiment enables the refrigerant quantity debugging accuracy to be higher and can achieve a better debugging effect.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (9)
1. A refrigerant quantity judging method is applied to a heating system of an air conditioner and is characterized by comprising the following steps:
receiving an indoor air outlet temperature parameter, an indoor electronic expansion valve supercooling degree parameter and at least two auxiliary judgment parameters; the auxiliary judgment parameters are used for representing the exhaust state and/or the suction state of the air conditioner and/or the state of an electronic expansion valve of an outdoor unit;
when the indoor air outlet temperature parameter is in the corresponding insufficient interval, and the supercooling degree parameter of the indoor electronic expansion valve and at least two of the at least two auxiliary judgment parameters are in the corresponding insufficient interval respectively, judging that the refrigerant quantity of the air conditioner is insufficient; the indoor air outlet temperature parameter is used as a necessary parameter for judging the insufficient refrigerant quantity of the air conditioner;
when the supercooling degree parameter of the internal machine electronic expansion valve is in the corresponding excess interval, and at least two of the indoor air outlet temperature parameter and the at least two auxiliary judgment parameters are in the corresponding excess intervals respectively, judging that the refrigerant quantity of the air conditioner is excessive; the supercooling degree parameter of the internal machine electronic expansion valve is used as a necessary parameter for judging the amount of the refrigerant coming from the air conditioner.
2. The refrigerant quantity judging method according to claim 1,
the auxiliary judgment parameters are temperature parameters, pressure parameters, superheat degree parameters or opening degree parameters of the electronic expansion valve; the temperature parameter is used for representing the exhaust temperature of the air conditioner, the pressure parameter is used for representing the exhaust pressure or the suction pressure of a system, and the superheat degree parameter is used for representing the suction superheat degree of a compressor or the superheat degree of an outer machine electronic expansion valve;
the refrigerant quantity judging method comprises the following steps:
and when the indoor air outlet temperature parameter is in the corresponding insufficient interval, and at least two of the supercooling degree parameter, the temperature parameter, the pressure parameter, the superheat degree parameter and the opening degree parameter of the electronic expansion valve of the indoor unit are in the corresponding insufficient interval respectively, judging that the refrigerant quantity of the air conditioner is insufficient.
3. The refrigerant quantity judging method according to claim 1, wherein the auxiliary determination parameter is a temperature parameter, a pressure parameter, a superheat parameter, or an opening parameter of an electronic expansion valve; the temperature parameter is used for representing the exhaust temperature of the air conditioner, the pressure parameter is used for representing the exhaust pressure or the suction pressure of a system, and the superheat degree parameter is used for representing the suction superheat degree of a compressor or the superheat degree of an outer machine electronic expansion valve;
the refrigerant quantity judging method comprises the following steps:
and when the supercooling degree parameter of the internal machine electronic expansion valve is in the corresponding excess interval, and at least two of the indoor air outlet temperature parameter, the pressure parameter, the superheat degree parameter and the opening degree parameter of the electronic expansion valve are in the corresponding excess intervals respectively, judging that the refrigerant quantity of the air conditioner is excessive.
4. The refrigerant quantity determination method according to claim 1, further comprising:
and when at least four of the indoor air outlet temperature parameter, the supercooling degree parameter of the internal machine electronic expansion valve and the at least two auxiliary judgment parameters are respectively in the corresponding qualified intervals, judging that the amount of the refrigerant of the air conditioner is proper.
5. A cooling medium amount control method is applied to an air conditioner heating automatic control system (100), and is characterized in that the air conditioner heating automatic control system (100) comprises an air conditioner (110) and a cooling medium amount adjusting device (120), the air conditioner (110) comprises a first pipeline (114) for high-pressure fluid to pass through and a second pipeline (115) for low-pressure fluid to pass through, and the cooling medium amount adjusting device (120) comprises a first liquid storage tank (121), a second liquid storage tank (122), a first electromagnetic valve (123) and a second electromagnetic valve (124); the first liquid storage tank (121) is connected with the first electromagnetic valve (123), the first electromagnetic valve (123) is connected with the first pipeline (114), the second liquid storage tank (122) is connected with the second electromagnetic valve (124), and the second electromagnetic valve (124) is connected with the second pipeline (115);
the refrigerant quantity control method comprises the following steps:
judging the refrigerant quantity of the air conditioner (110), wherein the step of judging the refrigerant quantity of the air conditioner (110) adopts the refrigerant quantity judging method as set forth in any one of claims 1-4;
under the condition of excessive refrigerant quantity, controlling a first electromagnetic valve (123) to be opened so as to lead the excessive refrigerant in the first pipeline (114) to be led into a first liquid storage tank (121);
and under the condition of insufficient refrigerant quantity, the second electromagnetic valve (124) is controlled to be opened so as to lead the refrigerant in the second liquid storage tank (122) to be led into the second pipeline (115).
6. The refrigerant quantity control method as claimed in claim 5, wherein, after the step of controlling the first solenoid valve (123) to open to introduce the excessive refrigerant in the first pipeline (114) into the first receiver (121) in the state of excessive refrigerant quantity, the refrigerant quantity control method further comprises:
receiving first liquid storage amount data of a first liquid storage tank (121);
and controlling the first electromagnetic valve (123) to close under the condition that the first liquid storage data is larger than the first preset value.
7. The refrigerant quantity control method according to claim 6, wherein first liquid storage amount data of the first liquid storage tank (121) is received, and after the step of controlling the first electromagnetic valve (123) to close in a state where the first liquid storage amount data is greater than a first preset value, the refrigerant quantity control method further comprises:
and continuing to execute the step of judging the refrigerant quantity of the air conditioner (110).
8. The refrigerant quantity control method according to claim 5, wherein after the step of controlling the second solenoid valve (124) to open to introduce the refrigerant in the second receiver (122) into the second pipeline (115) in the state of insufficient refrigerant quantity, the refrigerant quantity control method further comprises:
receiving second fluid reservoir data for a second fluid reservoir (122);
and controlling the second electromagnetic valve (124) to close under the condition that the second liquid storage data is smaller than a second preset value.
9. The refrigerant quantity control method according to claim 8, wherein, after the step of receiving second liquid storage quantity data of the first liquid storage tank (121) and controlling the second electromagnetic valve (124) to close in a state where the second liquid storage quantity data is smaller than a second preset value, the refrigerant quantity control method further comprises:
and continuing to execute the step of judging the refrigerant quantity of the air conditioner (110).
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| CN111023433B (en) * | 2019-12-31 | 2021-10-22 | 宁波奥克斯电气股份有限公司 | Multi-split refrigerant-lack control method and device, storage medium and air conditioning system |
| CN111486508B (en) * | 2020-04-30 | 2021-10-26 | 宁波奥克斯电气股份有限公司 | Adaptive refrigerant quantity multi-split system and control method thereof |
| CN113739348B (en) * | 2020-05-29 | 2023-05-26 | 广东美的制冷设备有限公司 | Refrigerant state detection method, air conditioner and storage medium |
| CN111795468B (en) * | 2020-07-14 | 2021-06-08 | 南京天加环境科技有限公司 | Refrigeration control method for indoor unit electronic expansion valve |
| CN112178863A (en) * | 2020-08-17 | 2021-01-05 | 珠海格力电器股份有限公司 | Refrigerant quantity control device and method and air conditioner |
| CN114279043B (en) * | 2021-12-08 | 2022-11-25 | 珠海格力电器股份有限公司 | Refrigerant shortage processing method and device, multi-split air conditioner and storage medium |
| CN115899990A (en) * | 2022-11-16 | 2023-04-04 | 宁波奥克斯电气股份有限公司 | Refrigerant quantity judging method and device, multi-split system and storage medium |
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