CN110068102B - Refrigerant quantity control method - Google Patents
Refrigerant quantity control method Download PDFInfo
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- CN110068102B CN110068102B CN201910356540.6A CN201910356540A CN110068102B CN 110068102 B CN110068102 B CN 110068102B CN 201910356540 A CN201910356540 A CN 201910356540A CN 110068102 B CN110068102 B CN 110068102B
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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
- 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
- F24F11/85—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 variable-flow pumps
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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
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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
- F24F2140/50—Load
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- Physics & Mathematics (AREA)
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- Mathematical Physics (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention provides a refrigerant quantity control method, and relates to the technical field of air conditioners. The control method of the refrigerant quantity is applied to an air conditioner refrigeration automatic debugging system, the air conditioner refrigeration automatic debugging system comprises an air conditioner and a refrigerant adjusting device, one end of an inner machine is connected with a four-way valve through a low-pressure pipeline, and the other end of the inner machine is connected with a heat exchanger through a high-pressure pipeline. A liquid discharging tank of the refrigerant adjusting device is connected with a first electromagnetic valve, the first electromagnetic valve is connected with a high-pressure pipeline, a liquid adding tank is connected with a second electromagnetic valve, and the second electromagnetic valve is connected with a low-pressure pipeline. The refrigerant quantity control method comprises the following steps: judging the state of the refrigerant quantity of the air conditioner; controlling the first electromagnetic valve to open under the condition of excessive refrigerant quantity so as to lead the excessive refrigerant in the high-pressure pipeline into the liquid discharge tank; and under the condition of insufficient refrigerant quantity, controlling the second electromagnetic valve to open so as to lead the refrigerant in the liquid adding tank to be led into the low-pressure pipeline. By adopting the refrigerant quantity control method, the refrigerant quantity can be efficiently and safely adjusted.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to a refrigerant quantity control method.
Background
Generally, an air conditioner includes an outdoor unit and indoor units respectively connected to the outdoor unit, and in a debugging stage in an air conditioner factory, controlling the amount of refrigerant is always a time-consuming project. How to efficiently and safely adjust the refrigerant quantity is a technical problem to be solved urgently.
Disclosure of Invention
The invention solves the problem of how to efficiently and safely adjust the refrigerant quantity.
In order to solve the problems, the invention provides a refrigerant quantity control method which is applied to an air conditioner refrigeration automatic debugging system, wherein the air conditioner refrigeration automatic debugging system comprises an air conditioner and a refrigerant adjusting device, the air conditioner comprises an outer machine and an inner machine, the outer machine comprises a four-way valve and a heat exchanger which are connected, one end of the inner machine is connected with the four-way valve through a low-pressure pipeline, and the other end of the inner machine is connected with the heat exchanger through a high-pressure pipeline; the refrigerant adjusting device comprises a liquid discharging tank, a liquid adding tank, a first electromagnetic valve and a second electromagnetic valve; the liquid discharging tank is connected with the first electromagnetic valve, the first electromagnetic valve is connected with the high-pressure pipeline, the liquid feeding tank is connected with the second electromagnetic valve, and the second electromagnetic valve is connected with the low-pressure pipeline;
the refrigerant quantity control method comprises the following steps:
judging the state of the refrigerant quantity of the air conditioner;
controlling the first electromagnetic valve to open under the condition of excessive refrigerant quantity so as to lead the excessive refrigerant in the high-pressure pipeline into the liquid discharge tank;
and under the condition of insufficient refrigerant quantity, controlling the second electromagnetic valve to open so as to lead the refrigerant in the liquid adding tank to be led into the low-pressure pipeline.
Through the state of judging the refrigerant volume, the first solenoid valve of independent control is opened, with the leading-in discharge tank of too much refrigerant in the high-pressure line, perhaps controls the second solenoid valve and opens alone, with the leading-in low-pressure line of the refrigerant in the fluid reservoir, the overall process is intelligent operation, and the security performance is high to can increase substantially and adjust efficiency.
Further, the step of determining the amount of refrigerant of the air conditioner includes:
receiving a first judgment factor and at least one second judgment factor; the first judgment factor comprises at least one of system exhaust pressure and system suction pressure, and the at least one second judgment factor comprises at least one of exhaust temperature, compressor superheat degree, superheat degree of an electronic expansion valve, opening degree of the electronic expansion valve and system supercooling degree;
and judging the state of the refrigerant quantity according to the first judgment factor and at least one second judgment factor.
The mode that the refrigerant quantity state is judged by the first judgment factor and the at least one second judgment factor is adopted, the accuracy is high, the debugging efficiency can be effectively improved, and the debugging effect is improved.
Further, the step of determining the state of the refrigerant quantity according to the first determination factor and the at least one second determination factor includes:
and when the first judgment factors are in the corresponding qualified ranges, or each second judgment factor is in the corresponding qualified range, judging the proper amount of the refrigerant of the air conditioner.
Further, the step of determining the state of the refrigerant quantity according to the first determination factor and the at least one second determination factor includes:
and when the first judgment factor is in the corresponding shortage range and at least one second judgment factor is in the corresponding shortage range, judging that the refrigerant quantity of the air conditioner is insufficient.
On the premise of judging the first judgment factor, at least one judgment factor is used for assisting in judging whether the refrigerant quantity is insufficient, so that the judgment accuracy can be improved.
Further, the step of determining the state of the refrigerant quantity according to the first determination factor and the at least one second determination factor includes:
and when the first judgment factor is in the corresponding excess range and at least one second judgment factor is in the corresponding excess range, judging that the refrigerant quantity of the air conditioner is excessive.
On the premise of judging the first judgment factor, at least one judgment factor is used for assisting in judging whether the refrigerant quantity is excessive, so that the judgment accuracy can be improved.
Further, after the step of controlling the first solenoid valve to open to introduce the excessive refrigerant in the high-pressure pipeline into the discharge tank in the state where the refrigerant amount is excessive, the refrigerant amount control method further includes:
receiving first liquid storage amount data of the liquid discharge tank under the condition of excessive refrigerant amount;
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.
The refrigerant quantity is judged and released step by step, so that the debugging efficiency can be improved, and the debugging precision is ensured.
Further, after the step of receiving first liquid storage amount data of the discharge tank and controlling the first electromagnetic valve to close in a state where the first liquid storage amount data is greater than a first preset value, the refrigerant amount control method further includes:
and continuing to execute the step of judging the state of the refrigerant quantity of the air conditioner.
Further, after the step of controlling the second solenoid valve to open to introduce the refrigerant in the charge tank to the low-pressure pipeline in the state where the refrigerant quantity is insufficient, the refrigerant quantity control method further includes:
receiving second liquid storage amount data of the liquid discharge tank under the state of insufficient refrigerant amount;
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.
The refrigerant quantity is judged and added step by step, so that the debugging efficiency can be improved, and the debugging precision is ensured.
Further, after the step of receiving second liquid storage amount data of the discharge tank and controlling the second electromagnetic valve to close in a state where 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 state of the refrigerant quantity of the air conditioner.
Furthermore, the refrigerant adjusting device also comprises a liquid feeding pump, the liquid feeding tank is connected with the liquid discharging tank through a one-way valve, and the liquid feeding pump is arranged between the liquid feeding tank and the liquid discharging tank; the refrigerant quantity control method further comprises the following steps:
receiving first pressure data of the liquid discharge tank;
receiving second pressure data of the liquid adding tank;
controlling the charging pump to be started when the first pressure data is larger than a first rated value;
and controlling the charging pump to be started when the second pressure data is smaller than a second rated value.
Drawings
Fig. 1 is a schematic structural diagram of an automatic debugging system for air conditioner refrigeration according to an embodiment of the present invention.
Fig. 2 is a flow chart of a refrigerant quantity control method according to an embodiment of the present invention.
Fig. 3 is a flowchart illustrating a step of determining a refrigerant quantity status of an air conditioner according to an embodiment of the present invention.
Description of reference numerals:
100-an air conditioner refrigeration automatic debugging system; 110-an air conditioner; 112-an outdoor unit; 1121-four-way valve; 1122-a heat exchanger; 113-inner machine; 114-low pressure line; 115-high pressure line; 120-refrigerant regulating device; 121-liquid discharge tank; 122-a liquid adding tank; 123-a first solenoid valve; 124-a second solenoid valve; 125-liquid adding pump.
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 schematic structural diagram of an automatic debugging system 100 for air conditioner refrigeration according to the present embodiment. Fig. 2 is a flow chart of a refrigerant quantity control method according to this embodiment. Referring to fig. 1 and fig. 2, the present embodiment provides a refrigerant quantity control method and an automatic debugging system 100 for air conditioner refrigeration applied by the refrigerant quantity control method.
The air conditioner cooling automatic debugging system 100 includes an air conditioner 110 and a refrigerant adjusting device 120. The refrigerant adjusting device 120 is used for adjusting the flow rate of the refrigerant of the air conditioner 110 at the debugging stage of the air conditioner 110.
It should be noted that the air conditioner 110 may be a multi-split air conditioner, or may be a common single indoor unit or single outdoor unit air conditioner.
Optionally, the air conditioner 110 includes an outdoor unit 112 and a plurality of indoor units 113. The plurality of inner units 113 are connected to the outer unit 112.
The outdoor unit 112 includes a four-way valve 1121 and a heat exchanger 1122 connected to each other, and one end of each of the plurality of indoor units 113 is connected to the four-way valve 1121 through a low-pressure line 114, and the other end thereof is connected to the heat exchanger 1122 through a high-pressure line 115.
The refrigerant adjusting device 120 includes a discharge tank 121, a charging tank 122, a first solenoid valve 123, and a second solenoid valve 124; the drain tank 121 is connected to a first solenoid valve 123, the first solenoid valve 123 is connected to the high-pressure line 115, the priming tank 122 is connected to a second solenoid valve 124, and the second solenoid valve 124 is connected to the low-pressure line 114.
It can be understood that the amount of refrigerant in the air conditioner 110 can be conveniently and rapidly adjusted by controlling the first solenoid valve 123 and the second solenoid valve 124.
Optionally, in this embodiment, the liquid adding tank 122 and the liquid discharging tank 121 are connected through a check valve, so that the air conditioner refrigeration automatic debugging system 100 forms a refrigerant circulation system. The cooling medium adjusting device 120 further includes a liquid charging pump 125, and the liquid charging pump 125 is disposed between the liquid charging tank 122 and the liquid discharging tank 121. It can be understood that the refrigerant in the tapping tank 121 can be rapidly introduced into the charging tank 122 by the charging pump 125.
In this embodiment, the refrigerant quantity control method includes the following steps:
step S110: the state of the refrigerant quantity of the air conditioner 110 is determined.
The state judgment of the refrigerant quantity is the basis for the refrigerant quantity adjustment. The accuracy of state judgment directly influences the accuracy and efficiency of refrigerant quantity regulation.
Fig. 3 is a flowchart illustrating a procedure of determining a state of a refrigerant quantity of the air conditioner 110 according to this embodiment. Referring to fig. 3, optionally, in this embodiment, the step S110 may include the following steps:
step S112: a first decision factor and at least one second decision factor are received.
The first determination factor is a factor that can accurately represent the state of the refrigerant quantity, and is therefore a necessary factor for determining the refrigerant quantity. At least one second judgment factor is used for assisting in judging the state of the refrigerant quantity.
Alternatively, in this embodiment, the first determination factor may include at least one of a system exhaust pressure and a system suction pressure, that is, the first determination factor may be the system exhaust pressure or the system suction pressure, or the first determination factor may be the system exhaust pressure and the system suction pressure.
The at least one second determination factor may include at least one of a discharge temperature, a compressor superheat, a superheat of the electronic expansion valve, an electronic expansion valve opening, and a system subcooling.
That is, any one of the exhaust temperature, the degree of superheat of the compressor, the degree of superheat of the electronic expansion valve, the degree of opening of the electronic expansion valve, and the degree of supercooling of the system may be selected, or any two, three, or all of them may be selected.
Optionally, in this embodiment, all the parameters are selected.
Under the national standard refrigeration 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:
the system exhaust pressure range is 2.8 MPa-3.2 MPa (preferably 2.85 MPa); the range of the system suction pressure is 0.6Mpa to 0.8Mpa (preferably 0.7 Mpa);
② the exhaust temperature is 70-80 ℃ (preferably 75 ℃); the exhaust superheat degree is 25-35 ℃ (preferably 30 ℃);
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 112 is 3-6 ℃ (preferably 4 ℃);
the opening range of the electronic expansion valve of the outdoor unit 112 is 120pls to 200pls (preferably 150 pls);
the supercooling degree range of the system is 3-6 ℃ (preferably 4 ℃).
When the refrigerant quantity of the system is insufficient, the insufficient intervals corresponding to the parameters are as follows:
exhaust pressure of the system is less than 2.8 Mpa; the system suction pressure is less than 0.6 Mpa;
② the exhaust temperature is more than 80 ℃; the exhaust superheat degree is more than 35 ℃;
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 112 is more than 6 ℃;
the opening degree of the electronic expansion valve of the outdoor unit 112 is larger than 200 pls;
the supercooling degree of the system is less than 3 ℃.
When the refrigerant quantity of the system is excessive, the excessive interval corresponding to each parameter is as follows:
the exhaust pressure of the system is more than 3.2 Mpa; the system suction pressure is more than 0.8 Mpa;
the exhaust temperature is less than 70 ℃; the exhaust superheat degree is less than 25 ℃;
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 112 is less than 3 ℃;
fourthly, the opening of the electronic expansion valve of the outdoor unit 112 is less than 120 pls;
the supercooling degree of the system is more than 6 ℃.
The inventor found that the sensitivity of the system discharge pressure and the system suction pressure is the highest when the refrigerant quantity is insufficient or excessive during the cooling process of the air conditioner 110, and therefore, in the present embodiment, the system discharge pressure and the system suction pressure are used as necessary parameters for determining the refrigerant quantity state of the air conditioner 110.
Alternatively, step S110 may include the steps of:
and judging the state of the refrigerant quantity according to the first judgment factor and at least one second judgment factor.
In this embodiment, the determining the state of the refrigerant quantity according to the first determination factor and the at least one second determination factor includes:
step S1131: when the first judgment factor is in the corresponding qualified range, or each second judgment factor is in the corresponding qualified range, the proper amount of refrigerant of the air conditioner 110 is judged.
Step S1132: when the first determination factor is within the corresponding shortage range and the at least one second determination factor is within the corresponding shortage range, it is determined that the refrigerant quantity of the air conditioner 110 is insufficient.
Step S1133: when the first determination factor is within the corresponding excess range and the at least one second determination factor is within the corresponding excess range, it is determined that the amount of refrigerant in the air conditioner 110 is excessive.
It is understood that the state of the refrigerant quantity may be preliminarily determined by determining the range of the first determination factor, and if the first determination factor is within the corresponding qualified range, the refrigerant quantity of the air conditioner 110 is appropriate. If the first judgment factor is in the corresponding shortage range or the first judgment factor is in the corresponding excess range, the state of the refrigerant quantity can be judged by combining a plurality of second judgment factors.
For example, after the air conditioner 110 is operated for 30 minutes, the first determination factor and the second determination factors are determined, and if the current system discharge pressure is less than 2.8Mpa and the current discharge temperature is greater than 80 ℃, the pre-heating refrigerant amount is determined to be insufficient. For another example, if the current system suction pressure is less than 0.6Mpa and the system supercooling degree is less than 3 ℃, the pre-added refrigerant quantity is determined to be insufficient.
For example, after the air conditioner 110 performs a cooling operation for 30 minutes, if the current system discharge pressure is greater than 3.2Mpa, and the degree of superheat of the electronic expansion valve of the outdoor unit 112 is less than 3 ℃, it is determined that the pre-heating amount of refrigerant is excessive. For another example, if the current system suction pressure is greater than 0.8Mpa, the system supercooling degree is greater than 6 ℃, and the compressor suction excess is less than 3 ℃, the pre-added refrigerant amount is determined to be excessive.
For example, after the air conditioner 110 is operated for 30 minutes, the current system discharge pressure is 2.85Mpa, and the appropriate amount of refrigerant can be directly determined.
In addition, it should be noted that, after the system refrigerant amount is adjusted, the state of the refrigerant amount of the air conditioner refrigeration automatic debugging system 100 is judged again, and if each second judgment factor is within the corresponding qualified range, or the first judgment factor is within the corresponding qualified range, the proper amount of the refrigerant amount of the air conditioner 110 can be directly judged.
Optionally, the refrigerant quantity control method may further include the following steps:
step S121: when the amount of refrigerant is excessive, the first solenoid valve 123 is controlled to be opened, so that the excessive refrigerant in the high-pressure pipeline 115 is introduced into the liquid discharge tank 121.
Step S131: in a state where the amount of refrigerant is excessive, the first liquid storage amount data of the liquid discharge tank 121 is received.
Step S141: 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.
Step S123: and ending under the condition of proper amount of refrigerant.
After the above steps are completed, the process of determining the state of the refrigerant quantity of the air conditioner 110 is continuously performed.
It can be understood that the refrigerant amount of the air conditioner 110 can be adjusted by opening the first solenoid valve 123 to introduce the excessive refrigerant in the high pressure pipeline 115 into the tapping tank 121. The adjustment of the refrigerant quantity is performed in steps, a certain amount of refrigerant is released to the liquid discharge tank 121 once, the judgment and the debugging are repeated for many times until the refrigerant quantity is proper, and the judgment is quitted.
Optionally, in this embodiment, 20 to 60g (preferably 50g) of refrigerant release amount per time preset by the system is released into the liquid discharge tank, when the first stored liquid amount data is greater than 50g, the first electromagnetic valve 123 is controlled to be closed, the system is judged after running for 30 minutes again, if the first judgment factor is in the corresponding qualified range, or each second judgment factor is in the corresponding qualified range, the proper amount of refrigerant of the air conditioner 110 is judged, and the judgment is exited.
Optionally, the refrigerant quantity control method further includes the following steps:
step S122: in the state of insufficient refrigerant quantity, the second solenoid valve 124 is controlled to open, so that the refrigerant in the charge tank 122 is led into the low-pressure pipeline 114.
Step S132: and receiving second liquid storage amount data of the liquid discharge tank 121 in a state where the refrigerant amount is insufficient.
Step S142: 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.
After the above steps are completed, the process of determining the state of the refrigerant quantity of the air conditioner 110 is continuously performed.
It is understood that the amount of refrigerant in the air conditioner 110 can be adjusted by opening the second solenoid valve 124 to direct the refrigerant in the charge tank 122 to the low pressure line 114. The adjustment of the refrigerant quantity is performed in steps, a certain amount of refrigerant is added to the low-pressure pipeline 114 once, the judgment and the debugging are repeated for a plurality of times until the refrigerant quantity is proper, and the judgment is quitted, so that the adjustment precision can be improved.
Optionally, in this embodiment, 20 to 60g (preferably 50g) of refrigerant is added into the low pressure pipeline 114 per preset amount of refrigerant added by the system, when the second stored liquid amount data is less than 50g, the second electromagnetic valve 124 is automatically closed, the system further determines after running for 30 minutes again, if the first determination factor is within the corresponding qualified range, or each second determination factor is within the corresponding qualified range, the appropriate amount of refrigerant of the air conditioner 110 is determined, and the determination is exited.
In order to realize the refrigerant circulation of the air conditioner refrigeration automatic debugging system 100, in this embodiment, the refrigerant quantity control method may further include the following steps:
receiving first pressure data of the receiving and dispensing tank 121;
receiving second pressure data of the charge tank 122;
controlling the charge pump 125 to turn on when the first pressure data is greater than the first nominal value;
and controlling the charging pump 125 to be started when the second pressure data is less than the second rated value.
That is, the refrigerant can be adjusted between the drain tank 121 and the charging tank 122 by controlling the charging pump 125 to be turned on according to the pressure of the drain tank 121 being too high or the pressure of the charging tank 122 being too low.
In summary, in the refrigerant quantity control method provided in this embodiment, the state of the refrigerant quantity is determined, the first solenoid valve 123 is independently controlled to be opened, so that excessive refrigerant in the high-pressure pipeline 115 is introduced into the discharge tank 121, or the second solenoid valve 124 is independently controlled to be opened, so that refrigerant in the charge tank 122 is introduced into the low-pressure pipeline 114, the whole process is intelligent operation, the safety performance is high, and the regulation efficiency can be greatly improved.
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 (8)
1. A refrigerant quantity control method is applied to an air conditioner refrigeration automatic debugging system (100), and is characterized in that the air conditioner refrigeration automatic debugging system (100) comprises an air conditioner (110) and a refrigerant adjusting device (120), the air conditioner (110) comprises an outer unit (112) and an inner unit (113), the outer unit (112) comprises a four-way valve (1121) and a heat exchanger (1122) which are connected, one end of the inner unit (113) is connected with the four-way valve (1121) through a low-pressure pipeline (114), and the other end of the inner unit is connected with the heat exchanger (1122) through a high-pressure pipeline (115); the refrigerant adjusting device (120) comprises a liquid discharging tank (121), a liquid adding tank (122), a first electromagnetic valve (123) and a second electromagnetic valve (124); the liquid discharging tank (121) is connected with the first electromagnetic valve (123), the first electromagnetic valve (123) is connected with the high-pressure pipeline (115), the liquid adding tank (122) is connected with the second electromagnetic valve (124), and the second electromagnetic valve (124) is connected with the low-pressure pipeline (114);
the refrigerant quantity control method comprises the following steps:
judging the state of the refrigerant quantity of the air conditioner (110);
under the condition of excessive refrigerant quantity, controlling the first electromagnetic valve (123) to be opened so as to lead the excessive refrigerant in the high-pressure pipeline (115) to be led into the liquid discharge tank (121);
under the condition of insufficient refrigerant quantity, controlling the second electromagnetic valve (124) to be opened so as to lead the refrigerant in the liquid adding tank (122) to be led into the low-pressure pipeline (114);
after the step of controlling the first solenoid valve (123) to open to introduce the excessive refrigerant in the high-pressure pipeline (115) into the discharge tank (121) in the state of the excessive refrigerant, the refrigerant quantity control method further includes: receiving first liquid storage amount data of the liquid discharge tank (121) in a state that the amount of the refrigerant is excessive; controlling the first electromagnetic valve (123) to close under the condition that the first liquid storage data is larger than a first preset value;
the step of controlling the second electromagnetic valve (124) to be opened to lead the refrigerant in the liquid adding tank (122) to be led into the low-pressure pipeline (114) under the state that the refrigerant quantity is insufficient comprises the following steps: receiving second liquid storage amount data of the liquid discharge tank (121) in a state that the amount of the refrigerant is insufficient; 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.
2. The refrigerant quantity control method according to claim 1, wherein the step of determining the refrigerant quantity of the air conditioner (110) includes:
receiving a first judgment factor and at least one second judgment factor; the first judgment factor comprises at least one of system exhaust pressure and system suction pressure, and the at least one second judgment factor comprises at least one of exhaust temperature, compressor superheat degree, superheat degree of an electronic expansion valve, opening degree of the electronic expansion valve and system supercooling degree;
and judging the state of the refrigerant quantity according to the first judgment factor and at least one second judgment factor.
3. The refrigerant quantity control method according to claim 2, wherein the step of determining the state of the refrigerant quantity based on the first determination factor and at least one of the second determination factors includes:
and when the first judgment factors are in the corresponding qualified ranges, or each second judgment factor is in the corresponding qualified range, judging the proper amount of the refrigerant of the air conditioner (110).
4. The refrigerant quantity control method according to claim 2, wherein the step of determining the state of the refrigerant quantity based on the first determination factor and at least one of the second determination factors includes:
and when the first judgment factor is in the corresponding shortage range and at least one second judgment factor is in the corresponding shortage range, judging that the refrigerant quantity of the air conditioner (110) is insufficient.
5. The refrigerant quantity control method according to claim 2, wherein the step of determining the state of the refrigerant quantity based on the first determination factor and at least one of the second determination factors includes:
and when the first judgment factor is in the corresponding excess range and at least one second judgment factor is in the corresponding excess range, judging that the refrigerant quantity of the air conditioner (110) is excessive.
6. The refrigerant amount control method according to any one of claims 1 to 5, wherein the refrigerant amount control method, after the step of receiving first liquid storage amount data of the discharge tank (121) and controlling the first solenoid valve (123) to close in a state where the first liquid storage amount data is greater than a first preset value, further comprises:
and continuing to execute the step of judging the state of the refrigerant quantity of the air conditioner (110).
7. The refrigerant amount control method according to any one of claims 1 to 5, wherein the refrigerant amount control method, after the step of receiving second liquid storage amount data of the discharge tank (121) and controlling the second solenoid valve (124) to close in a state where the second liquid storage amount data is less than a second preset value, further comprises:
and continuing to execute the step of judging the state of the refrigerant quantity of the air conditioner (110).
8. The refrigerant quantity control method according to claim 1, wherein the refrigerant regulating device (120) further comprises a liquid adding pump (125), the liquid adding tank (122) is connected with the liquid discharging tank (121) through a one-way valve, and the liquid adding pump (125) is arranged between the liquid adding tank (122) and the liquid discharging tank (121); the refrigerant quantity control method further comprises the following steps:
receiving first pressure data of the liquid discharge tank (121);
receiving second pressure data for the charge tank (122);
controlling the charging pump (125) to start when the first pressure data is greater than a first rated value;
and controlling the charging pump (125) to be started when the second pressure data is smaller than a second rated value.
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| CN110529966A (en) * | 2019-09-09 | 2019-12-03 | 宁波奥克斯电气股份有限公司 | A kind of change coolant quantity air-conditioning system and its control method |
| CN111102680A (en) * | 2019-12-10 | 2020-05-05 | 宁波奥克斯电气股份有限公司 | Automatic refrigerant quantity calibration device and calibration method |
| CN111023412A (en) * | 2019-12-16 | 2020-04-17 | 宁波奥克斯电气股份有限公司 | Refrigerant filling device and method |
| CN111023484B (en) * | 2019-12-16 | 2021-04-02 | 宁波奥克斯电气股份有限公司 | Automatic control method for refrigerant quantity in heating mode |
| CN111174368B (en) * | 2020-01-07 | 2021-10-15 | 宁波奥克斯电气股份有限公司 | Method for automatically adjusting refrigerant quantity of air conditioner and air conditioning system |
| CN113405243A (en) * | 2020-03-16 | 2021-09-17 | 青岛海尔空调电子有限公司 | Control method of 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 |
| CN113701873A (en) * | 2020-05-19 | 2021-11-26 | 广州汽车集团股份有限公司 | Refrigerant flow sound detection device, system and method |
| CN112797680A (en) * | 2020-12-31 | 2021-05-14 | 珠海格力电器股份有限公司 | Control device, method and system for automatically filling refrigerant and air conditioning equipment |
| CN114370689B (en) * | 2022-01-27 | 2023-06-02 | 宁波奥克斯电气股份有限公司 | Refrigerant charge amount determination method, control method, air conditioner, and storage medium |
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