CN114370689A - Refrigerant charge amount determination method, control method, air conditioner and storage medium - Google Patents

Abstract

The present invention relates to the technical field of air conditioners, and in particular, to a refrigerant charging amount determination method, a control method, an air conditioner and a storage medium. The problem solved by the present invention is the problem of how to fill the air conditioner with an accurate amount of refrigerant at different temperatures. To solve the above problem, an embodiment of the present invention provides a method for determining a refrigerant charge amount for an air conditioner. The method includes: selecting a first operating parameter and a second operating parameter of the air conditioner according to the outdoor ambient temperature of the air conditioner; The first operating parameter is controlled until the refrigerant circulation volume of the air conditioner remains stable, and the air conditioner is charged with refrigerant; according to the second operating parameter, the refrigerant charging amount of the air conditioner is determined; wherein, the first operating parameter is the same as An operating parameter related to the refrigerant circulation amount, and the second operating parameter is an operating parameter related to the refrigerant charging amount.

Description

Refrigerant charge amount determination method, control method, air conditioner and storage medium

technical field

The present invention relates to the technical field of air conditioners, and in particular, to a refrigerant charging amount determination method, a control method, an air conditioner and a storage medium.

Background technique

Inappropriate refrigerant volume can easily lead to problems such as unstable operation and performance degradation of the multi-line system unit. Appropriate refrigerant volume is the basis for stable operation. The system performs real-time monitoring to realize the automatic determination of the amount of refrigerant during the charging process, but the determination of a single parameter will be affected by various factors such as indoor and outdoor ambient temperature, model, etc., which leads to a certain deviation in the amount of refrigerant determined.

SUMMARY OF THE INVENTION

The problem solved by the present invention is the problem of how to fill the air conditioner with an accurate amount of refrigerant at different temperatures.

To solve the above problem, an embodiment of the present invention provides a method for determining a refrigerant charge amount for an air conditioner. The method includes: selecting a first operating parameter and a second operating parameter of the air conditioner according to the outdoor ambient temperature of the air conditioner; The first operation parameter is controlled until the refrigerant circulation volume of the air conditioner remains stable, and then the air conditioner is charged with refrigerant; according to the second operation parameter, the refrigerant charge amount of the air conditioner is determined; wherein, the first operation parameter is the same as that of the air conditioner. An operating parameter related to the refrigerant circulation amount, and the second operating parameter is an operating parameter related to the refrigerant charging amount.

Compared with the prior art, the technical effect achieved by adopting this technical solution is that the parameters of the air conditioner are adjusted according to different outdoor ambient temperatures, the refrigerant circulation volume of the air conditioner is kept stable by controlling the first operating parameter, and the The charging process of the refrigerant is not affected by the work loss, and the charging amount of the refrigerant is determined by the second operation parameter, so that the charging amount of the refrigerant is more accurate.

In an embodiment of the present invention, it further includes: the first operating parameter is selected from one or a combination of the following: compressor frequency, fan speed; and/or the second operating parameter is selected from one or a combination of the following: high pressure temperature , Indoor unit expansion valve opening, subcooling.

Compared with the prior art, the technical effect achieved by adopting this technical solution: combining the law of the opening degree of the internal machine valve with the law of the change of high pressure pressure, it is possible to accurately judge the amount of refrigerant in the air-conditioning system under different external temperatures. It makes the automatic charging function more accurate when charging refrigerant, and increases the practicability of the automatic charging function.

In an embodiment of the present invention, selecting the first operating parameter and the second operating parameter of the air conditioner according to the outdoor ambient temperature of the air conditioner includes: when the outdoor ambient temperature is less than or equal to a temperature threshold, selecting the The compressor frequency and fan speed are used as the first operating parameters, and the high pressure temperature of the air conditioner is selected as the second operating parameters.

Compared with the prior art, the technical effect achieved by adopting this technical solution: by setting the temperature threshold, the two judging methods of the internal valve opening and high pressure have a boundary point, and the system can compare the external temperature with the temperature threshold. , select a reasonable judgment method to control the refrigerant charge, and the temperature threshold can be adjusted according to the specific situation, which increases the compatibility of the automatic filling function.

In an embodiment of the present invention, determining the refrigerant charge amount of the air conditioner according to the second operating parameter includes: when the high pressure temperature falls within the first temperature range, determining that the refrigerant charge amount is appropriate; and/ Or, when the high-pressure temperature is lower than the lower limit of the first temperature range, determine that the refrigerant charge is insufficient; and/or, when the high-pressure temperature is higher than the upper limit of the first temperature range, determine to cool Excessive dosage of the agent.

Compared with the prior art, the technical effect achieved by this technical solution: by setting the temperature interval, the charging, releasing and maintaining circulation of the refrigerant are divided, so that the amount of refrigerant in the air-conditioning system will not appear during the adjustment process. The situation of more or less charging also reduces the impact of short-term errors in the system on the charging volume, and increases the stability of the automatic charging function.

In an embodiment of the present invention, it further includes: the lower limit value and the upper limit value of the first temperature interval are respectively linearly related to the outdoor ambient temperature; protection formulas T1=a1+b1*Tao, T2=a2+b2*Tao, and parameter values.

Compared with the prior art, the technical effect achieved by adopting this technical solution: the same volume of refrigerant can raise the same high pressure temperature, making the determination of the refrigerant charge amount based on the high pressure temperature more accurate, and the temperature range is the same as that of the outdoor temperature. The temperature is linearly related to ensure that the value of the high pressure temperature is within the temperature range when the external temperature is less than or equal to 10 °C and the charging amount reaches the standard.

In an embodiment of the present invention, selecting the first operating parameter and the second operating parameter of the air conditioner according to the outdoor ambient temperature of the air conditioner includes: when the outdoor ambient temperature is greater than the first temperature threshold, selecting the The compressor frequency is used as the first operating parameter, and the opening degree of the indoor unit expansion valve of the air conditioner is selected as the second operating parameter.

Compared with the prior art, the technical effect achieved by adopting this technical solution is: by controlling the operating frequency of the compressor, it is avoided that the refrigerant charging speed is too fast to cause communication failures such as compressor exhaust protection and high-pressure pressure protection, and the charging is increased. process stability.

In an embodiment of the present invention, determining the refrigerant charge amount of the air conditioner according to the second operation parameter includes: when the opening degree of the expansion valve of the indoor unit falls within the valve opening degree range, determining the refrigerant charge amount and/or, when the opening degree of the expansion valve of the indoor unit is lower than the lower limit value of the valve opening interval, it is determined that the refrigerant charge is insufficient; and/or, when the opening degree of the expansion valve of the indoor unit is higher than the valve opening degree When the upper limit value of the temperature range is reached, it is determined that the refrigerant charge amount is excessive.

Compared with the prior art, the technical effect achieved by this technical solution: by setting the valve opening interval, the amount of refrigerant charging, releasing and maintaining circulation is divided, so that the amount of refrigerant in the air-conditioning system is not adjusted during the adjustment process. There will be more or less charging, which also reduces the impact of short-term errors in the system on the charging volume, and increases the stability of the automatic charging function.

In an embodiment of the present invention, it further includes: the lower limit value and the upper limit value of the second temperature interval are respectively linearly related to the indoor ambient temperature of the air conditioner; the protection formula M1=a3+b3*T inner loop, M2=a4 +b4*T inner loop, and parameter values.

Compared with the prior art, the technical effect achieved by adopting this technical solution: the same volume of refrigerant can reduce the same valve opening interval, so that the determination of the refrigerant charge amount according to the valve opening interval becomes more accurate , the valve opening interval is linearly related to the indoor temperature, to ensure that when the external temperature is less than or equal to 10 °C and the filling amount reaches the standard, the valve opening value is located within the valve opening interval.

The present invention also provides an air conditioner. The air conditioner includes a processor, a memory, and a program or instruction stored in the memory and running on the processor. When the program or instruction is executed by the processor, the control method in the above embodiment is implemented. A step of.

The present invention also provides a readable storage medium on which programs or instructions are stored, and when the programs or instructions are executed by a processor, the steps of the control methods in the above embodiments are implemented.

Description of drawings

Fig. 1 is the flow chart of the judgment method of the present invention;

Fig. 2 is the logical schematic diagram of the judgment method of the present invention;

3 is a schematic diagram of the relationship between the opening degree of the expansion valve of the indoor unit and the indoor temperature according to the present invention;

FIG. 4 is a schematic diagram of the relationship between the high pressure temperature and the outdoor temperature in the present invention.

Detailed ways

In order to make the above objects, features and advantages of the present invention more clearly understood, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[First Embodiment]

Referring to Figure 1 and Figure 2, in a specific embodiment, the method includes:

S100. Select a first operating parameter and a second operating parameter of the air conditioner according to the outdoor ambient temperature of the air conditioner;

S200. Control the first operating parameter until the refrigerant circulation volume of the air conditioner remains stable, and then charge the air conditioner with refrigerant;

S300. Determine the refrigerant charge amount of the air conditioner according to the second operating parameter;

Wherein, the first operation parameter is an operation parameter related to the refrigerant circulation amount, and the second operation parameter is an operation parameter related to the refrigerant charge amount.

In step S100, the temperature of the outdoor environment is detected by a temperature sensor and other devices, the automatic filling function of the air conditioning system is activated, and different operating parameters are selected according to different outdoor environments, so as to ensure the smooth progress of refrigerant charging; in step S200 , by controlling the first operating parameter to control the circulation amount of the air conditioner refrigerant to keep stable, there will be a loss of refrigerant during the operation of the air conditioner, so it is necessary to keep the circulation amount of the refrigerant stable, when the circulation amount is stable and runs for a period of time After that, the determination result of the amount of refrigerant will be displayed on the main control panel of the air conditioner, and the determination result is the circulation amount of the refrigerant in the air conditioner; in step S300, the infusion amount of the refrigerant is controlled according to the second operating parameter. When the first operating parameter is used as a reference, the refrigerant is charged according to the judgment result, so that the charging amount will not be deviated due to consumption during the charging process, and the charging amount of the refrigerant will be more accurate.

During operation, the start of automatic refrigerant charging needs to be judged 15 minutes after the air conditioner is started. If the running time is less than 15 minutes, the above judgment method will not be executed.

Adjust the parameters of the air conditioner according to different outdoor ambient temperatures, and keep the refrigerant circulation volume of the air conditioner stable by controlling the first operating parameter to ensure that the refrigerant is not affected by work loss during the charging process. The operating parameters determine the refrigerant charge, making the refrigerant charge more accurate.

[Second Embodiment]

In a specific embodiment, it also includes:

S210. The first operating parameter is selected from one of the following or a combination thereof: compressor frequency, fan speed; and/or

S310. The second operating parameter is selected from one of the following or a combination thereof: high pressure temperature, opening degree of an indoor unit expansion valve, and subcooling degree.

In step S210, different first operating parameters are selected and controlled according to the difference of the outdoor ambient temperature of the air conditioner. When the outside temperature is less than or equal to 10°C, a certain output ratio needs to be controlled, that is, the compressor frequency and the fan speed are respectively fixed, When the circulating amount of refrigerant is stable, the judgment result of the amount of refrigerant will be displayed. When the outside temperature is greater than 10°C, only a certain compressor frequency will be controlled, and the corresponding fan speed will not be controlled.

In step 310, the high pressure temperature, the opening degree of the indoor unit expansion valve, and the degree of subcooling can all be used as factors for the amount of refrigerant to be charged. Among them, the high pressure temperature and the opening degree of the expansion valve of the indoor unit are the main judging factors, and the degree of subcooling is the auxiliary factor. Judging factors, when the outdoor temperature is greater than 10°C, the opening degree of the internal valve is obvious. When the amount of refrigerant in the system is determined, the charging of refrigerant begins. When the amount of refrigerant circulation increases , the internal valve will automatically reduce the opening to maintain the amount of refrigerant in the evaporator. Therefore, the smaller the opening of the internal valve, the greater the amount of refrigerant in the air conditioning system.

When the external temperature is less than or equal to 10°C, the subcooling degree with the outdoor temperature does not change significantly, and the internal valve of different refrigerants does not change much; after the frequency and fan speed are fixed, the high pressure law is obvious, which is easy to judge; when the external temperature When the temperature is greater than 10°C, the high-pressure pressure is affected by the frequency of the fan and the compressor, and the speed of the fan is not necessarily the same under each working condition, which will affect the judgment of the refrigerant charge.

Exemplarily, the indoor ambient temperature is 15°C, and the outdoor ambient temperature is 9°C. At this time, it can be determined that the air conditioning system is in the judgment condition that the outside temperature is less than 10°C. Therefore, after the air conditioning system is started, it will enter the refrigerant quantity judgment process with the high pressure temperature as the main judgment basis.

Combining the law of the opening degree of the internal machine valve with the law of the high pressure pressure change, it is possible to accurately judge the amount of refrigerant in the air conditioning system under different external temperatures, so that the automatic charging function can charge the refrigerant when charging the refrigerant. The volume is more accurate and the practicality of the automatic charging function is increased.

[Third Embodiment]

In a specific embodiment, selecting the first operating parameter and the second operating parameter of the air conditioner according to the outdoor ambient temperature of the air conditioner, including:

S220 , when the outdoor ambient temperature is less than or equal to the temperature threshold, select the compressor frequency and fan speed of the air conditioner as the first operating parameter, and select the high pressure temperature of the air conditioner as the second operating parameter.

In step S220, when the outdoor temperature is less than or equal to the temperature threshold, the compressor frequency and fan speed of the air conditioner are fixed, and the high pressure temperature is used as the main basis for determining the amount of refrigerant, and the high pressure temperature is converted from the high pressure pressure of the compressor, and the fan controls the high pressure. , so that it is within a certain range and has protective adjustment. When the fan speed does not reach the maximum, the amount of refrigerant increases, and the high pressure pressure maintains the target high pressure range under the fan adjustment. When the fan reaches the maximum speed, the more refrigerant, the higher the high pressure pressure. Therefore, when the fan is maintained at a certain speed, the higher the amount of refrigerant, the higher the high pressure will be.

Usually, the temperature threshold is 10°C. Preferably, when working in different environments, the temperature threshold can be adjusted appropriately, so that the change of high pressure pressure is within the range of obvious rules as the main basis for the refrigerant charge, for example: When the outside atmospheric pressure is low, the temperature threshold can be appropriately lowered.

Exemplarily, the indoor ambient temperature is in the range of 10-35°C, and the outdoor ambient temperature is in the range of 0-45°C. If the air conditioning system detects that the indoor ambient temperature is 15°C and the outside ambient temperature is 12°C. At this time, it can be determined that the air conditioning system is in the judgment condition that the external ambient temperature is ≥10 °C, so after the air conditioning system is started, it will enter the refrigerant quantity judgment process with the opening of the internal valve as the main judgment basis.

By setting the temperature threshold, there is a dividing point between the two judgment methods of the internal valve opening and high pressure pressure. The system can compare the external temperature with the temperature threshold, and select a reasonable judgment method to control the refrigerant charge. At the same time, the temperature threshold It can be adjusted according to the specific situation, which increases the compatibility of the automatic perfusion function.

[Fourth Embodiment]

Referring to FIG. 3, in a specific embodiment, according to the second operating parameter, the refrigerant charge amount of the air conditioner is determined, including:

S320. When the high-pressure temperature falls within the first temperature range, determine that the refrigerant charge is appropriate; and/or

S330. When the high-pressure temperature is lower than the lower limit value of the first temperature interval, determine that the refrigerant charge is insufficient; and/or

S340. When the high-pressure temperature is higher than the upper limit value of the first temperature interval, determine that the refrigerant charge amount is excessive.

When the outside temperature is less than or equal to the temperature threshold, first keep the compressor frequency and fan speed fixed, and after one end of operation, the refrigerant circulation in the air-conditioning system remains basically stable. At this time, the high-pressure pressure of the compressor is detected and converted into the corresponding high-pressure temperature.

In step S330, when the high-pressure temperature is lower than the lower limit of the first temperature interval, it indicates that the amount of refrigerant in the air-conditioning system is insufficient. At this time, the refrigerant is controlled to be charged into the air-conditioning system, and the high-pressure pressure rises with the charging process. ;

In step S320, when the high-pressure temperature falls within the first temperature range, it means that the amount of refrigerant in the air-conditioning system has reached the standard for normal operation, and the performance of the air-conditioning system can be recovered. Then, the refrigerant charge is turned off after continuous charging for the target time; it should be noted that the target time is usually 5 minutes, but the time can be appropriately extended or shortened according to different high pressure values;

In step S310, when the high-pressure temperature is higher than the upper limit of the first temperature interval, it means that the amount of refrigerant in the air-conditioning system has exceeded the requirement for the normal operation of the air-conditioning system. At this time, the judgment result displayed on the main control board is a multi-refrigerant state. , the air conditioner is controlled to release the refrigerant, and the high pressure temperature is lowered to the first temperature range, and then step S320 is repeated.

By setting the temperature interval, the charging, releasing and maintaining circulation of the refrigerant are divided, so that the refrigerant amount of the air conditioning system will not be overcharged or undercharged during the adjustment process, and it also reduces the short-term error of the system. The influence of the charging volume increases the stability of the automatic charging function.

[Fifth Embodiment]

In a specific embodiment, it also includes:

S340, the lower limit value and the upper limit value of the first temperature interval are respectively linearly related to the outdoor ambient temperature; the first temperature interval is obtained by the following formula: T1=a1+b1×Tao, T2=a2+b2×Tao; wherein , T1 is the lower limit of the first temperature interval, T2 is the upper limit of the first temperature interval, Tao is the outdoor ambient temperature, 29≤a1≤29.5, 34≤a2≤34.5, 1.3≤b1 ≤1.35, 1.3≤b2≤1.35.

In step S340, under the same outdoor temperature, the value of the high pressure temperature is positively correlated with the percentage of the refrigerant amount. The lower limit and the upper limit of a temperature range are linearly related to the outdoor temperature.

T1 is the lower limit of the first temperature range, and T2 is the upper limit of the first temperature range. Normally, when the outside temperature is less than or equal to 10°C, 29≤a1≤29.5, 34≤a2≤34.5, 1.3≤b1 =b2≤1.35, preferably, a1=29.13, a2=34.13, b1=b2=1.33.

The same volume of refrigerant can raise the same high-pressure temperature, which makes the determination of the refrigerant charging amount based on the high-pressure temperature more accurate. The temperature range is linearly related to the outdoor temperature, ensuring that the charging amount reaches When standard, the value of the high pressure temperature is within the temperature range.

[Sixth Embodiment]

In a specific embodiment, selecting the first operating parameter and the second operating parameter of the air conditioner according to the outdoor ambient temperature of the air conditioner, including:

S230, when the outdoor ambient temperature is greater than the first temperature threshold, select the compressor frequency of the air conditioner as the first operating parameter, and select the opening degree of the indoor unit expansion valve of the air conditioner as the second operating parameter.

In step S230, when the outdoor temperature is greater than the temperature threshold, the operating frequency of the compressor is controlled to avoid communication failures such as compressor discharge protection and high-pressure pressure protection caused by too fast refrigerant charging speed, thereby increasing the stability of refrigerant charging. When the refrigerant is charged into the air-conditioning system, since the superheat degree of the air conditioner’s internal unit is the set value, as the refrigerant increases, the circulation volume also increases, and the opening of the internal unit valve decreases to maintain The amount of refrigerant in the evaporator. Preferably, the temperature threshold is 10°C.

By controlling the operating frequency of the compressor, it can avoid communication failures such as compressor exhaust protection and high pressure protection caused by the refrigerant charging speed being too fast, and increase the stability of the charging process.

[Seventh Embodiment]

Referring to FIG. 4, in a specific embodiment, according to the second operating parameter, determining the refrigerant charge amount of the air conditioner includes:

S360, in the case that the opening degree of the expansion valve of the indoor unit falls within the valve opening degree range, determine that the refrigerant charge amount is appropriate; and/or

S370, when the opening degree of the expansion valve of the indoor unit is lower than the lower limit value of the valve opening degree interval, determine that the refrigerant charge amount is insufficient; and/or

S380, when the opening degree of the expansion valve of the indoor unit is higher than the upper limit value of the valve opening degree interval, it is determined that the refrigerant charge amount is excessive.

When the outside temperature is greater than the temperature threshold, keep the compressor running at a certain operating frequency and charge the refrigerant. During the charging process, the circulation of the refrigerant increases, and the opening of the internal valve also decreases.

In step S370, when the opening of the expansion valve of the indoor unit is higher than the upper limit of the valve opening interval, it means that the amount of refrigerant in the air-conditioning system is insufficient. The filling process is reduced;

In step S360, when the opening of the expansion valve of the indoor unit falls within the valve opening range, it means that the amount of refrigerant in the air-conditioning system has reached the standard for normal operation, and the performance of the air-conditioning can be recovered. At this time, the amount of refrigerant will be displayed on the main control board. Appropriate words, then, continue to charge the target time and then close the refrigerant charge; it should be noted that the target time is usually 5 minutes, but the time can be appropriately extended or shortened according to the opening of the internal engine valve;

In step S380, when the opening of the expansion valve of the indoor unit is higher than the upper limit of the valve opening interval, it means that the amount of refrigerant in the air-conditioning system has exceeded the requirement for the normal operation of the air-conditioning. At this time, the judgment result displayed on the main control board is: In the multi-refrigerant state, the air conditioner is controlled to release the refrigerant, and the opening degree of the internal unit valve is increased to within the valve opening degree range, and then step S360 is repeated.

By setting the valve opening interval, the charging, releasing and maintaining circulation of the refrigerant are divided, so that the refrigerant amount of the air-conditioning system will not be overcharged or undercharged during the adjustment process, and it also reduces the system short-term The effect of errors on the charge volume has increased the stability of the automatic charge function.

[Eighth Embodiment]

In a specific embodiment, it also includes: S390, the lower limit value and the upper limit value of the second temperature interval are respectively linearly related to the indoor ambient temperature of the air conditioner; the linear relationship between the valve opening interval and the indoor ambient temperature is: M1=a3+b3×T inner ring, M2=a4+b4×T inner ring; among them, M1 is the lower limit value of the valve opening interval, M2 is the upper limit value of the valve opening interval, and T inner ring is the outdoor environment Temperature, 99≤a3≤101, 34≤a4≤36, 2.2≤b3≤2.4, 6.9≤b4≤7.1.

In step S390, under the same indoor temperature, the size of the opening degree of the internal valve is positively correlated with the percentage of the amount of refrigerant. The limit is linearly related to the room temperature.

M1 is the lower limit of the valve opening range, and M2 is the upper limit of the valve opening range. Normally, when the outside temperature is greater than 10°C, 99≤a3≤101, 34≤a4≤36, 2.2≤b3≤ 2.4, 6.9≤b4≤7.1, preferably, a3=100, a4=35, b3=2.3, b4=7.

The same volume of refrigerant can reduce the same valve opening interval, making the determination of refrigerant charge more accurate according to the valve opening interval. The valve opening interval is linearly related to the indoor temperature, ensuring that the outside temperature is less than or equal to 10℃, when the charging amount reaches the standard, the value of the valve opening is within the valve opening range.

[Ninth Embodiment]

In a specific embodiment, the method further includes: a method for controlling refrigerant charging of an air conditioner, determining the refrigerant charging amount of the air conditioner according to the second operating parameter, including: when the air conditioner is refrigerated When the amount of refrigerant in the air conditioner is insufficient, the refrigerant is charged; when the amount of refrigerant in the air conditioner is excessive, the refrigerant is released; when the amount of refrigerant in the air conditioner is appropriate, the charging is continued for the target time and then stopped.

The target time is usually 5 minutes. After the determination of the amount of refrigerant is completed, the charging and releasing of the refrigerant is controlled by the control method, so that the refrigerant in the air-conditioning system can meet the performance of the air-conditioning system.

[Tenth Embodiment]

In a specific embodiment, the present invention also provides an air conditioner, the air conditioner includes a processor, a memory, and a program or instruction stored in the memory and executed on the processor, and the program or instruction is implemented when executed by the processor The steps of the control method in the above-mentioned embodiment. The present invention also provides a readable storage medium on which programs or instructions are stored, and when the programs or instructions are executed by a processor, the steps of the control methods in the above embodiments are implemented.

Although the present invention is disclosed above, the present invention is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention should be based on the scope defined by the claims.

Claims (13)

1. A refrigerant charge amount determination method for an air conditioner, wherein the method comprises: selecting the first operating parameter and the second operating parameter of the air conditioner according to the outdoor ambient temperature of the air conditioner; controlling the first operating parameter until the refrigerant circulation volume of the air conditioner remains stable, and then charging the air conditioner with refrigerant; determining the refrigerant charge amount of the air conditioner according to the second operating parameter; Wherein, the first operating parameter is an operating parameter related to the refrigerant circulation amount, and the second operating parameter is an operating parameter related to the refrigerant charging amount. 2. The method according to claim 1, wherein The first operating parameter is selected from one or a combination of the following: compressor frequency, fan speed; and/or The second operating parameter is selected from one of the following or a combination thereof: high pressure temperature, indoor unit expansion valve opening degree, and subcooling degree. 3. The method according to claim 1, wherein the selecting the first operating parameter and the second operating parameter of the air conditioner according to the outdoor ambient temperature of the air conditioner comprises: When the outdoor ambient temperature is less than or equal to the temperature threshold, the compressor frequency and fan speed of the air conditioner are selected as the first operation parameters, and the high pressure temperature of the air conditioner is selected as the second operation parameter. 4. The method according to claim 3, wherein determining the refrigerant charge amount of the air conditioner according to the second operating parameter comprises: When the high pressure temperature falls within the first temperature range, it is determined that the refrigerant charge amount is appropriate; and/or In the case that the high pressure temperature is lower than the lower limit value of the first temperature interval, it is determined that the refrigerant charge amount is insufficient; and/or When the high pressure temperature is higher than the upper limit value of the first temperature interval, it is determined that the refrigerant charge amount is excessive. 5 . The method according to claim 4 , wherein the lower limit value and the upper limit value of the first temperature interval are respectively linearly related to the outdoor ambient temperature. 6 . 6. The method according to claim 4, wherein the first temperature interval is obtained by the following formula: T1=a1+b1×Tao, T2=a2+b2×Tao; Wherein, T1 is the lower limit of the first temperature interval, T2 is the upper limit of the first temperature interval, Tao is the outdoor ambient temperature, 29≤a1≤29.5, 34≤a2≤34.5, 1.3≤ b1≤1.35, 1.3≤b2≤1.35. 7. The method according to claim 1, wherein the selecting the first operating parameter and the second operating parameter of the air conditioner according to the outdoor ambient temperature of the air conditioner comprises: In the case that the outdoor ambient temperature is greater than the first temperature threshold, the compressor frequency of the air conditioner is selected as the first operating parameter, and the opening degree of the indoor unit expansion valve of the air conditioner is selected as the second operating parameter Operating parameters. 8 . The method according to claim 7 , wherein determining the refrigerant charge amount of the air conditioner according to the second operating parameter comprises: 8 . In the case that the opening degree of the expansion valve of the indoor unit falls within the valve opening degree range, it is determined that the refrigerant charge amount is appropriate; and/or In the case that the opening degree of the expansion valve of the indoor unit is lower than the lower limit value of the valve opening degree interval, it is determined that the refrigerant charge amount is insufficient; and/or When the opening degree of the indoor unit expansion valve is higher than the upper limit value of the valve opening degree interval, it is determined that the refrigerant charge amount is excessive. 9 . The method according to claim 8 , wherein the lower limit value and the upper limit value of the valve opening degree interval are respectively linearly related to the indoor ambient temperature of the air conditioner. 10 . 10. The method according to claim 9, wherein the linear relationship between the valve opening interval and the indoor ambient temperature is: M1=a3+b3×T inner ring, M2=a4+b4×T inner ring; Among them, M1 is the lower limit value of the valve opening range, M2 is the upper limit value of the valve opening range, T inner ring is the outdoor ambient temperature, 99≤a3≤101, 34≤a4≤36, 2.2≤b3≤2.4, 6.9≤b4≤7.1. 11. A control method for refrigerant charging of an air conditioner, wherein the control method comprises: Using the determination method according to any one of claims 1 to 10, determine the refrigerant charge amount of the air conditioner; When it is determined that the refrigerant charging amount is appropriate, the charging is continued for the target time and then the charging is stopped. 12. An air conditioner, characterized in that the air conditioner comprises a processor, a memory, and a program or instruction stored on the memory and executable on the processor, the program or instruction being processed by the processor The steps of the control method according to any one of claims 1 to 10 are realized when the controller is executed. 13. A readable storage medium, wherein a program or an instruction is stored on the readable storage medium, and when the program or instruction is executed by a processor, the control according to any one of claims 1 to 10 is realized steps of the method.

Images