Air conditioner, method for adding refrigerant thereto, and storage medium

Abstract

The application provides an air conditioner and a refrigerant supplement method thereof and a storage medium. The refrigerant supplement method of the air conditioner comprises the following steps: acquiring an outdoor environment temperature; comparing the outdoor environment temperature with a preset temperature; when the outdoor environment temperature is greater than or equal to the preset temperature, controlling the air conditioner to enter a refrigerant supplement mode in a cooling mode; and when the outdoor environment temperature is less than the preset temperature, controlling the air conditioner to enter the refrigerant supplement mode in a heating mode. According to the refrigerant supplement method of the air conditioner, the refrigerant supplement amount of the air conditioner can be conveniently adjusted, so that the refrigerant supplement amount matches the refrigerant demand amount of the air conditioner.

Description

Technical Field

[0001] This invention relates to the field of air conditioning technology, and more specifically, to an air conditioner and its refrigerant charging method and storage medium. Background Technology

[0002] Air conditioners require additional refrigerant in the following two situations during use and installation: 1. The connecting pipes are too long during installation, and the amount of refrigerant pre-filled at the factory is insufficient for the long connecting pipes; 2. After a period of use, the refrigerant slowly leaks, resulting in insufficient refrigerant. For adding refrigerant to long connecting pipes during installation, technicians can determine the required amount based on the manufacturer's recommended refrigerant dosage and the length of the connecting pipe. However, in cases of refrigerant leakage, it is often impossible to know the required amount. On-site refrigerant additions are also frequently performed improperly, with workers adding refrigerant arbitrarily based on experience. Inappropriate refrigerant addition can cause reliability issues with the air conditioner. Insufficient refrigerant can lead to poor cooling performance and high compressor discharge temperatures, while excessive refrigerant can cause compressor oil return, resulting in compressor damage. Summary of the Invention

[0003] The main objective of this invention is to provide an air conditioner, a refrigerant replenishment method thereon, and a storage medium, which can conveniently adjust the amount of refrigerant added to the air conditioner so that the amount of refrigerant added matches the refrigerant demand of the air conditioner.

[0004] To achieve the above objectives, according to one aspect of the present invention, a method for adding refrigerant to an air conditioner is provided, comprising:

[0005] Obtain the outdoor ambient temperature;

[0006] Compare the outdoor ambient temperature with the preset temperature;

[0007] When the outdoor ambient temperature is greater than or equal to the preset temperature, the air conditioner is controlled to enter the refrigerant charging mode according to the cooling mode.

[0008] When the outdoor ambient temperature is lower than the preset temperature, the air conditioner will switch to refrigerant charging mode in heating mode.

[0009] Furthermore, the steps following the control of the air conditioner to enter the refrigerant charging mode from the cooling mode include:

[0010] Obtain indoor ambient temperature;

[0011] The operating parameters of the compressor, throttle valve, outdoor fan, and indoor fan are determined based on the indoor and outdoor ambient temperatures.

[0012] Control the compressor, throttle valve, outdoor fan, and indoor fan to run for time t1 according to the determined operating parameters;

[0013] Open the solenoid valve to start adding refrigerant into the air conditioner.

[0014] Furthermore, the steps for determining the operating parameters of the compressor, throttle valve, outdoor fan, and indoor fan based on the indoor and outdoor ambient temperatures include:

[0015] When T 内 <T 内1 And T 外1 <T 外 <T 外2 At that time, the compressor frequency is controlled to operate at F. 1C The external fan speed is running at R 外1C The internal fan speed is running at R 内1C The throttle valve opening is at B. 1C ;

[0016] When T 内1 ≤T 内 ≤T 内2 And T 外1 <T 外 <T 外2 At that time, the compressor frequency is controlled to operate at F. 2C The external fan speed is running at R 外2C The internal fan speed is running at R 内2C The throttle valve opening is at B. 2C ;

[0017] When T 内2 <T 内 And T 外1 <T 外 <T 外2 At that time, the compressor frequency is controlled to operate at F. 3C The external fan speed is running at R 外3C The internal fan speed is running at R 内3C The throttle valve opening is at B. 3C ;

[0018] When T 内 <T 内1 And T 外2 ≤T 外 ≤T 外3 At that time, the compressor frequency is controlled to operate at F. 4C The external fan speed is running at R 外4C The internal fan speed is running at R 内4C The throttle valve opening is at B. 4C ;

[0019] When T 内1 ≤T 内 ≤T 内2 And T 外2 ≤T外 ≤T 外3 At that time, the compressor frequency is controlled to operate at F. 5C The external fan speed is running at R 外5C The internal fan speed is running at R 内5C The throttle valve opening is at B. 5C ;

[0020] When T 内2 <T 内 And T 外2 ≤T 外 ≤T 外3 At that time, the compressor frequency is controlled to operate at F. 6C The external fan speed is running at R 外6C The internal fan speed is running at R 内6C The throttle valve opening is at B. 6C ;

[0021] When T 内 <T 内1 And T 外3 <T 外 At that time, the compressor frequency is controlled to operate at F. 7C The external fan speed is running at R 外7C The internal fan speed is running at R 内7C The throttle valve opening is at B. 7C ;

[0022] When T 内1 ≤T 内 ≤T 内2 And T 外3 <T 外 At that time, the compressor frequency is controlled to operate at F. 8C The external fan speed is running at R 外8C The internal fan speed is running at R 内8C The throttle valve opening is at B. 8C ;

[0023] When T 内2 <T 内 And T 外3 <T 外 At that time, the compressor frequency is controlled to operate at F. 9C The external fan speed is running at R 外9C The internal fan speed is running at R 内9C The throttle valve opening is at B. 9C ;

[0024] Where F 1C <F 4C F 7C <F 4C F 1C <F 2C <F3C R 外1C <R 外4C <R 外7C R 外1C <R 外2C <R 外3C R 内1C >R 内4C >R 内7C R 内1C >R 内2C >R 内3C B 1C <B 4C <B 7C B 1C <B 2C <B 3C .

[0025] Furthermore, methods for adding refrigerant also include:

[0026] Obtain the compressor discharge temperature and external pipe temperature;

[0027] The obtained compressor discharge temperature and external pipe temperature are compared with the preset discharge temperature and external pipe temperature.

[0028] Determine whether the additional refrigerant amount is sufficient based on the comparison results.

[0029] Furthermore, the steps to determine whether the additional refrigerant amount is sufficient based on the comparison results include:

[0030] Determine whether the external pipe temperature has reached the preset external pipe temperature;

[0031] If the preset external pipe temperature is reached, the solenoid valve is closed and maintained for time t2.

[0032] Determine whether the compressor exhaust temperature is less than or equal to the preset exhaust temperature;

[0033] If the refrigerant temperature is less than or equal to the preset exhaust temperature, it is determined that the refrigerant addition is sufficient, the refrigerant addition is stopped, and the solenoid valve is closed.

[0034] If the exhaust temperature is higher than the preset temperature, it is determined that the refrigerant addition is insufficient. Continue to add refrigerant until the external pipe temperature is a℃ lower than the preset external pipe temperature. Then, close the solenoid valve again and continue for time t3.

[0035] The process then proceeds to determine whether the compressor exhaust temperature is less than or equal to the preset exhaust temperature.

[0036] Furthermore, if the external pipe temperature is x*a℃ lower than the preset external pipe temperature, and the compressor discharge temperature is still higher than the preset discharge temperature and the compressor power is greater than the preset power, the refrigerant addition will be stopped, the solenoid valve will be closed, and the air conditioner will be turned off.

[0037] Furthermore, the step of comparing the obtained compressor discharge temperature and external pipe temperature with the preset discharge temperature and external pipe temperature includes:

[0038] When T 内 <T 内1 And T 外1 <T 外 <T 外2 At that time, the preset exhaust temperature is T. 排1C The preset external tube temperature is T. 外管1 The preset compressor power is P. C1 ;

[0039] When T 内1 ≤T 内 ≤T 内2 And T 外1 <T 外 <T 外2 At that time, the preset exhaust temperature is T. 排2C The preset external tube temperature is T. 外管2 The preset compressor power is P. C2 ;

[0040] When T 内2 <T 内 And T 外1 <T 外 <T 外2 At that time, the preset exhaust temperature is T. 排3C The preset external tube temperature is T. 外管3 The preset compressor power is P. C3 ;

[0041] When T 内 <T 内1 And T 外2 ≤T 外 ≤T 外3 At that time, the preset exhaust temperature is T. 排4C The preset external tube temperature is T. 外管4 The preset compressor power is P. C4 ;

[0042] When T 内1 ≤T 内 ≤T 内2 And T 外2 ≤T 外 ≤T 外3 At that time, the preset exhaust temperature is T. 排5C The preset external tube temperature is T. 外管5 The preset compressor power is P. C5 ;

[0043] When T 内2 <T 内 And T外2 ≤T 外 ≤T 外3 At that time, the preset exhaust temperature is T. 排6C The preset external tube temperature is T. 外管6 The preset compressor power is P. C6 ;

[0044] When T 内 <T 内1 And T 外3 <T 外 At that time, the preset exhaust temperature is T. 排7C The preset external tube temperature is T. 外管7 The preset compressor power is P. C7 ;

[0045] When T 内1 ≤T 内 ≤T 内2 And T 外3 <T 外 At that time, the preset exhaust temperature is T. 排8C The preset external tube temperature is T. 外管8 The preset compressor power is P. C8 ;

[0046] When T 内2 <T 内 And T 外3 <T 外 At that time, the preset exhaust temperature is T. 排9C The preset external tube temperature is T. 外管9 The preset compressor power is P. C9 ;

[0047] Where T 排1C <T 排4C <T 排7C T 外管1 <T 外管4 <T 外管7 P C1 <P C4 <P C7 T 排1C <T 排2C <T 排3C T 外管1 <T 外管2 <T 外管3 P C1 <P C2 <P C3 .

[0048] Furthermore, the steps following the control of the air conditioner to switch from heating mode to refrigerant replenishment mode include:

[0049] Obtain indoor ambient temperature;

[0050] The operating parameters of the compressor, throttle valve, outdoor fan, and indoor fan are determined based on the indoor and outdoor ambient temperatures.

[0051] Control the compressor, throttle valve, outdoor fan, and indoor fan to run for t4 time according to the determined operating parameters;

[0052] Open the solenoid valve to start adding refrigerant into the air conditioner.

[0053] Furthermore, the steps for determining the operating parameters of the compressor, throttle valve, outdoor fan, and indoor fan based on the indoor and outdoor ambient temperatures include:

[0054] When T 内 <T 内3 And T 外 ≤T 外5 At that time, the compressor frequency is controlled to operate at F. 1H The external fan speed is running at R 外1H The internal fan speed is running at R 内3H The throttle valve opening is at B. 1H ;

[0055] When T 内3 ≤T 内 ≤T 内4 And T 外 ≤T 外5 At that time, the compressor frequency is controlled to operate at F. 2H The external fan speed is running at R 外2H The internal fan speed is running at R 内4H The throttle valve opening is at B. 2H ;

[0056] When T 内4 <T 内 And T 外 ≤T 外5 At that time, the compressor frequency is controlled to operate at F. 3H The external fan speed is running at R 外3H The internal fan speed is running at R 内3H The throttle valve opening is at B. 3H ;

[0057] When T 内 <T 内3 And T 外5 <T 外 <T 外4 At that time, the compressor frequency is controlled to operate at F. 4H The external fan speed is running at R 外4H The internal fan speed is running at R 内4H The throttle valve opening is at B. 4H ;

[0058] When T 内3 ≤T 内 ≤T 内4 And T 外5 <T 外 <T 外4 At that time, the compressor frequency is controlled to operate at F. 5H The external fan speed is running at R 外5H The internal fan speed is running at R 内5H The throttle valve opening is at B. 5H ;

[0059] When T 内4 <T 内 And T 外5 <T 外 <T 外4 At that time, the compressor frequency is controlled to operate at F. 6H The external fan speed is running at R 外6H The internal fan speed is running at R 内6H The throttle valve opening is at B. 6H ;

[0060] When T 内 <T 内3 And T 外4 ≤T 外 ≤T 外1 At that time, the compressor frequency is controlled to operate at F. 7H The external fan speed is running at R 外7H The internal fan speed is running at R 内7H The throttle valve opening is at B. 7H ;

[0061] When T 内3 ≤T 内 ≤T 内4 And T 外4 ≤T 外 ≤T 外1 At that time, the compressor frequency is controlled to operate at F. 8H The external fan speed is running at R 外8H The internal fan speed is running at R 内8H The throttle valve opening is at B. 8H ;

[0062] When T 内4 <T 内 And T 外4 ≤T 外 ≤T 外1 At that time, the compressor frequency is controlled to operate at F. 9H The external fan speed is running at R 外9H The internal fan speed is running at R 内9H The throttle valve opening is at B. 9H ;

[0063] Where F 1H <F 4H <F 7H F 3H <F 2H <F 1H R 外7H <R 外4H <R 外1H R 外3H <R 外2H <R 外1H R 内1H <R 内4H <R 内7H R 内1H <R 内2H <R 内3H B 1H <B 4H <B 7H B 1H <B 2H <B 3H .

[0064] Furthermore, methods for adding refrigerant also include:

[0065] Obtain the compressor discharge temperature and internal pipe temperature;

[0066] The obtained compressor discharge temperature and inner pipe temperature are compared with the preset discharge temperature and inner pipe temperature.

[0067] Determine whether the additional refrigerant amount is sufficient based on the comparison results.

[0068] Furthermore, the steps to determine whether the additional refrigerant amount is sufficient based on the comparison results include:

[0069] Determine whether the inner tube temperature has reached the preset inner tube temperature;

[0070] If the preset inner tube temperature is reached, the solenoid valve will be closed and maintained for time t5.

[0071] Determine whether the compressor exhaust temperature is less than or equal to the preset exhaust temperature;

[0072] If the refrigerant temperature is less than or equal to the preset exhaust temperature, it is determined that the refrigerant addition is sufficient, the refrigerant addition is stopped, and the solenoid valve is closed.

[0073] If the temperature exceeds the preset exhaust temperature, it is determined that the refrigerant addition is insufficient. Continue to add refrigerant until the inner pipe temperature is b℃ lower than the preset inner pipe temperature. Then, close the solenoid valve again and continue for time t6.

[0074] The process then proceeds to determine whether the compressor exhaust temperature is less than or equal to the preset exhaust temperature.

[0075] Furthermore, if the internal pipe temperature is y*b℃ lower than the preset internal pipe temperature, and the compressor discharge temperature is still higher than the preset discharge temperature and the compressor power is greater than the preset power, the refrigerant addition will be stopped, the solenoid valve will be closed, and the air conditioner will be turned off.

[0076] Furthermore, the step of comparing the obtained compressor discharge temperature and inner pipe temperature with the preset discharge temperature and inner pipe temperature includes:

[0077] When T 内 <T 内3 And T 外 ≤T 外5 At that time, the preset exhaust temperature is T. 排1H The preset inner tube temperature is T. 内管1 The preset compressor power is P. H1 ;

[0078] When T 内3 ≤T 内 ≤T 内4 And T 外 ≤T 外5 At that time, the preset exhaust temperature is T. 排2H The preset inner tube temperature is T. 内管2 The preset compressor power is P. H2 ;

[0079] When T 内4 <T 内 And T 外 ≤T 外5 At that time, the preset exhaust temperature is T. 排3H The preset inner tube temperature is T. 内管3 The preset compressor power is P. H3 ;

[0080] When T 内 <T 内3 And T 外5 <T 外 <T 外4 At that time, the preset exhaust temperature is T. 排4H The preset inner tube temperature is T. 内管4 The preset compressor power is P. H4 ;

[0081] When T 内3 ≤T 内 ≤T 内4 And T 外5 <T 外 <T 外4 At that time, the preset exhaust temperature is T. 排5H The preset inner tube temperature is T. 内管5 The preset compressor power is P. H5 ;

[0082] When T 内4 <T 内 And T 外5 <T 外 <T 外4 At that time, the preset exhaust temperature is T. 排6H The preset inner tube temperature is T. 内管6 The preset compressor power is P. H6 ;

[0083] When T 内 <T 内3 And T 外4 ≤T 外 ≤T 外1 At that time, the preset exhaust temperature is T. 排7H The preset inner tube temperature is T. 内管7 The preset compressor power is P. H7 ;

[0084] When T 内3 ≤T 内 ≤T 内4 And T 外4 ≤T 外 ≤T 外1 At that time, the preset exhaust temperature is T. 排8H The preset inner tube temperature is T. 内管8 The preset compressor power is P. H8 ;

[0085] When T 内4 <T 内 And T 外4 ≤T 外 ≤T 外1 At that time, the preset exhaust temperature is T. 排9H The preset inner tube temperature is T. 内管9 The preset compressor power is P. H9 ;

[0086] Where T 排1H <T 排4H <T 排7H T 内管1 <T 内管4 <T 内管7 P H1 <P H4 <P H7 , 排1H <T 排2H <T 排3H T 内管1 <T 内管2 <T 内管3 P H1 <P H2 <P H3 .

[0087] According to another aspect of the present invention, an air conditioner is provided that applies the above-described refrigerant addition method.

[0088] Furthermore, the air conditioner includes an intake pipe and a refrigerant charging device. The refrigerant charging device is connected to the intake pipe and includes a charging pipeline, a solenoid valve, and a speed control device. Both the solenoid valve and the speed control device are located on the charging pipeline.

[0089] Furthermore, the additional piping and intake pipe are integrated into a single structure.

[0090] Furthermore, a detachable connection is added between the additional piping and the intake pipe.

[0091] Furthermore, the refrigerant replenishment device also includes a refrigerant replenishment valve, and the refrigerant replenishment valve, solenoid valve, and speed control device are sequentially arranged on the replenishment pipeline along the refrigerant replenishment direction.

[0092] Furthermore, the refrigerant charging device also includes a charging mode button, and the air conditioner also includes a controller, with the charging mode button connected to the controller.

[0093] Furthermore, the speed regulating device is a capillary tube or a flow regulating valve.

[0094] Furthermore, the flow control valve is an electronic expansion valve.

[0095] Furthermore, the air conditioner also includes a prompter and a controller. The prompter is connected to the controller and issues a prompt signal after the air conditioner enters the refrigerant charging mode and the controller opens the solenoid valve.

[0096] Furthermore, the air conditioner also includes a controller, an outdoor heat exchanger, an indoor heat exchanger, an outer loop temperature sensor, an outer pipe temperature sensor, an inner loop temperature sensor, and an inner pipe temperature sensor. The outer loop temperature sensor is used to detect the outdoor ambient temperature, the inner loop temperature sensor is used to detect the indoor ambient temperature, the outer pipe temperature sensor is used to detect the outer pipe temperature of the outdoor heat exchanger, and the inner pipe temperature sensor is used to detect the inner pipe temperature of the indoor heat exchanger. The outer loop temperature sensor, the outer pipe temperature sensor, the inner loop temperature sensor, and the inner pipe temperature sensor are all electrically connected to the controller.

[0097] Furthermore, the air conditioner also includes a controller, which is equipped with a parameter setting module for setting refrigerant addition parameters.

[0098] According to another aspect of the present invention, a storage medium is provided that stores the above-described method for adding refrigerant to an air conditioner.

[0099] According to the technical solution of this invention, the refrigerant replenishment method for an air conditioner includes: acquiring the outdoor ambient temperature; comparing the outdoor ambient temperature with a preset temperature; when the outdoor ambient temperature is greater than or equal to the preset temperature, controlling the air conditioner to enter a refrigerant replenishment mode according to the cooling mode; and when the outdoor ambient temperature is less than the preset temperature, controlling the air conditioner to enter a refrigerant replenishment mode according to the heating mode. This refrigerant replenishment method can automatically determine the type of refrigerant replenishment mode based on the outdoor ambient temperature, and can select a suitable refrigerant replenishment mode according to the outdoor ambient temperature, so that the refrigerant replenishment mode matches the outdoor ambient temperature. This allows for convenient adjustment of the refrigerant replenishment amount, ensuring that the refrigerant replenishment amount matches the refrigerant demand of the air conditioner. Attached Figure Description

[0100] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0101] Figure 1 A structural schematic diagram of an air conditioner according to an embodiment of the present invention is shown; and

[0102] Figure 2 A flowchart of a refrigerant addition method for an air conditioner according to an embodiment of the present invention is shown.

[0103] The above figures include the following reference numerals:

[0104] 1. Compressor; 2. Four-way valve; 3. Exhaust temperature sensor; 4. Outdoor heat exchanger; 5. Outdoor fan; 6. External pipe temperature sensor; 7. Outer ring temperature sensor; 8. Filter; 9. Throttling valve; 10. First shut-off valve; 11. Indoor heat exchanger; 12. Inner pipe temperature sensor; 13. Inner ring temperature sensor; 14. Indoor fan; 15. Second shut-off valve; 16. Solenoid valve; 17. Speed ​​control device; 18. Refrigerant charging valve. Detailed Implementation

[0105] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0106] See Figure 1 As shown, according to an embodiment of the present invention, the air conditioner includes an air intake pipe and a refrigerant charging device. The refrigerant charging device is connected to the air intake pipe. The refrigerant charging device includes a charging pipeline, a solenoid valve 16, and a speed control device 17. The solenoid valve 16 and the speed control device 17 are both disposed on the charging pipeline.

[0107] In this embodiment, by adding a refrigerant replenishing device to the air intake pipe of the air conditioner, the refrigerant replenishing operation can be realized using the refrigerant replenishing device. The structure is simpler and the operation is more convenient. It can realize quick connection or disconnection with the air intake pipe of the air conditioner, quickly realize the refrigerant replenishment of the air conditioner, and improve the refrigerant replenishment efficiency of the air conditioner.

[0108] In one embodiment, the additional piping and the intake pipe are integrated into one unit. In this configuration, the additional piping and the intake pipe are integrated, making the entire refrigerant replenishment device and the intake pipe a single unit. The refrigerant replenishment device is only used for refrigerant replenishment and will not affect other functions when refrigerant replenishment is not performed. Because the refrigerant replenishment device and the intake pipe are integrated, loss of the refrigerant replenishment device can be effectively prevented.

[0109] In one embodiment, the additional piping is detachably connected to the intake pipe. In this embodiment, the additional piping and the intake pipe are detachably connected, allowing the additional piping to be connected during use to connect the refrigerant charging device to the intake pipe, facilitating refrigerant charging. After the refrigerant charging operation is completed, the refrigerant charging device can be disassembled from the intake pipe, resulting in a more streamlined overall structure of the air conditioner. This structure makes the use of the refrigerant charging device more convenient and flexible.

[0110] In one embodiment, the refrigerant replenishment device further includes a refrigerant replenishment valve 18, and the refrigerant replenishment valve 18, the solenoid valve 16, and the speed control device 17 are sequentially arranged on the replenishment pipeline along the refrigerant replenishment direction. The solenoid valve 16 is used to control the on / off state of the replenishment pipeline. The solenoid valve 16 is connected to a controller, which can control the solenoid valve 16 to select an appropriate time to control the on / off state of the replenishment pipeline, thereby improving the automation level of refrigerant replenishment.

[0111] In this embodiment, the refrigerant replenishment valve 18 is a manual valve. The operator needs to manually open the valve after connecting the refrigerant tank when adding refrigerant and manually close it when finishing refrigerant replenishment. The refrigerant replenishment valve 18 enables physical control of refrigerant replenishment, allowing manual control of the opening and closing of the refrigerant pipeline. In conjunction with the electrically controlled solenoid valve 16, it combines electrical and manual control of the refrigerant pipeline, avoiding both human error and malfunctions caused by electronic control program failures. This provides dual protection, improving the safety and reliability of the refrigerant replenishment device.

[0112] In one embodiment, the refrigerant charging device further includes a charging mode button, and the air conditioner further includes a controller, with the charging mode button connected to the controller.

[0113] In this embodiment, the refrigerant replenishment mode button can be wirelessly connected to the controller or directly installed on the controller. When the refrigerant replenishment mode button is pressed, the controller receives a signal and controls the air conditioner to enter the refrigerant replenishment mode to perform the refrigerant replenishment operation. By setting the refrigerant replenishment mode button, active control of refrigerant replenishment can be achieved, facilitating the refrigerant replenishment operation and making it easier for the controller to control the air conditioner to enter the refrigerant replenishment control state.

[0114] In one embodiment, the speed regulating device 17 is a capillary tube or a flow regulating valve.

[0115] When the speed control device 17 is a capillary tube, the refrigerant addition speed can be adjusted by using the capillary tube, so that the refrigerant addition speed can be decelerated through the capillary tube, thereby preventing the compressor 1 from returning liquid due to excessively fast addition speed.

[0116] In one embodiment, the capillary tube is detachably installed on the additional piping, and the capillary tube can be replaced as needed to obtain a suitable refrigerant addition rate.

[0117] In one embodiment, the flow regulating valve is an electronic expansion valve. The electronic expansion valve can regulate the flow rate of the refrigerant, thus making the adjustment of the refrigerant addition rate more flexible and convenient. It can quickly obtain a suitable refrigerant addition rate, ensuring refrigerant addition efficiency while avoiding refrigerant return issues in compressor 1.

[0118] The flow control valve can also be any other valve that can regulate flow.

[0119] In one embodiment, the air conditioner further includes a prompter and a controller, the prompter being connected to the controller and issuing a prompt signal after the air conditioner enters the refrigerant replenishment mode and the controller opens the solenoid valve 16.

[0120] In this embodiment, when the air conditioner enters the refrigerant charging mode, the controller controls the solenoid valve 16 to open and controls the indicator to issue a prompt signal, prompting the operator to connect the refrigerant tank and manually open the refrigerant charging valve 18 to perform the refrigerant charging operation. The prompt signal can be an audible or visual signal, or a combination of both.

[0121] In one embodiment, the air conditioner further includes a controller, an outdoor heat exchanger 4, an indoor heat exchanger 11, an outer ring temperature sensor 7, an outer pipe temperature sensor 6, an inner ring temperature sensor 13, and an inner pipe temperature sensor 12. The outer ring temperature sensor 7 is used to detect the outdoor ambient temperature, the inner ring temperature sensor 13 is used to detect the indoor ambient temperature, the outer pipe temperature sensor 6 is used to detect the outer pipe temperature of the outdoor heat exchanger 4, and the inner pipe temperature sensor 12 is used to detect the inner pipe temperature of the indoor heat exchanger 11. The outer ring temperature sensor 7, the outer pipe temperature sensor 6, the inner ring temperature sensor 13, and the inner pipe temperature sensor 12 are all electrically connected to the controller.

[0122] In one embodiment, the air conditioner further includes a controller, which is equipped with a parameter setting module for setting refrigerant addition parameters.

[0123] Because different regions and seasons can affect the operation of air conditioners, it is necessary to be able to flexibly adjust various parameters during the refrigerant top-up process to ensure more precise control parameters and a more accurate and reliable refrigerant top-up control process. By setting a parameter setting module on the controller, operators can manually set control parameters, or the system can connect directly to the network to obtain appropriate control parameters, reducing control difficulty and improving control effectiveness.

[0124] In this embodiment, the air conditioner also includes a four-way valve 2, an exhaust temperature sensor 3, an outdoor fan 5, an indoor fan 14, a filter 8, a throttle valve 9, a first shut-off valve 10, and a second shut-off valve 15. The first shut-off valve 10 and the second shut-off valve 15 are located at both ends of the indoor heat exchanger 11. The outdoor fan 5 is set to correspond to the outdoor heat exchanger 4, and the indoor fan 14 is set to correspond to the indoor heat exchanger 11. The exhaust temperature sensor 3 is set at the exhaust port of the compressor 1 and is used to detect the exhaust temperature of the compressor 1.

[0125] According to an embodiment of the present invention, the storage medium stores the following method for adding refrigerant to an air conditioner.

[0126] See also Figure 2 As shown in the embodiment of the present invention, the refrigerant addition method of the air conditioner includes: acquiring the outdoor ambient temperature; comparing the outdoor ambient temperature with a preset temperature; when the outdoor ambient temperature is greater than or equal to the preset temperature T1, controlling the air conditioner to enter the refrigerant addition mode according to the cooling mode; when the outdoor ambient temperature is less than the preset temperature T1, controlling the air conditioner to enter the refrigerant addition mode according to the heating mode.

[0127] The refrigerant addition method of this air conditioner can automatically determine the type of refrigerant addition mode based on the outdoor ambient temperature, and can select the appropriate refrigerant addition mode according to the outdoor ambient temperature, so that the refrigerant addition mode matches the outdoor ambient temperature, thereby making it easy to adjust the refrigerant addition amount of the air conditioner and match the refrigerant addition amount with the refrigerant demand of the air conditioner.

[0128] The refrigerant addition method in this embodiment allows the air conditioner to determine whether to add refrigerant in cooling mode or heating mode based on the outdoor ambient temperature, thus matching the refrigerant addition with the outdoor ambient temperature and improving the accuracy of the refrigerant addition amount.

[0129] T1 is the dividing point between refrigerant charging in cooling mode and refrigerant charging in heating mode. When charging refrigerant, either cooling or heating mode must be used. Outdoor ambient temperature is the biggest influencing factor, so no other variables need to be added. The T1 setting is generally quite low, for example, 18–20°C. For example, if T1 is 25°C, and the outdoor temperature is 24°C, refrigerant charging should be done in heating mode; if the outdoor temperature is 26°C, refrigerant charging should be done in cooling mode.

[0130] In one embodiment, the step of controlling the air conditioner to enter the refrigerant charging mode according to the cooling mode is followed by:

[0131] Obtain indoor ambient temperature;

[0132] The operating parameters of compressor 1, throttle valve 9, outdoor fan 5, and indoor fan 14 are determined based on the indoor and outdoor ambient temperatures.

[0133] Control the compressor 1, throttle valve 9, external fan 5, and internal fan 14 to run for time t1 according to the determined operating parameters;

[0134] Open solenoid valve 16 to begin adding refrigerant into the air conditioner.

[0135] After entering refrigerant replenishment mode, the air conditioner opens the solenoid valve 16 and emits a beeping sound, prompting the worker to connect the refrigerant tank and manually open the refrigerant replenishment valve 18.

[0136] In cooling mode, the compressor 1, expansion valve 9, outdoor fan 5, and indoor fan 14 in refrigerant replenishment mode operate according to the parameters in Table 1.

[0137] Table 1

[0138]

[0139]

[0140] Referring to Table 1, in one embodiment, the steps for determining the operating parameters of compressor 1, throttle valve 9, outdoor fan 5, and indoor fan 14 based on indoor and outdoor ambient temperatures include:

[0141] When T 内 <T 内1 And T 外1 <T 外 <T 外2 At that time, the compressor frequency is controlled to operate at F. 1C The external fan speed is running at R 外1C The internal fan speed is running at R 内1C The throttle valve opening is at B. 1C ;

[0142] When T 内1 ≤T 内 ≤T 内2 And T 外1 <T 外 <T 外2 At that time, the compressor frequency is controlled to operate at F. 2C The external fan speed is running at R 外2C The internal fan speed is running at R 内2C The throttle valve opening is at B. 2C ;

[0143] When T 内2 <T 内 And T 外1 <T 外 <T 外2 At that time, the compressor frequency is controlled to operate at F. 3C The external fan speed is running at R 外3C The internal fan speed is running at R 内3C The throttle valve opening is at B. 3C ;

[0144] When T 内 <T 内1 And T 外2 ≤T 外 ≤T 外3 At that time, the compressor frequency is controlled to operate at F. 4C The external fan speed is running at R 外4C The internal fan speed is running at R 内4C The throttle valve opening is at B. 4C ;

[0145] When T 内1 ≤T 内 ≤T 内2 And T 外2 ≤T 外 ≤T 外3 At that time, the compressor frequency is controlled to operate at F.5C The external fan speed is running at R 外5C The internal fan speed is running at R 内5C The throttle valve opening is at B. 5C ;

[0146] When T 内2 <T 内 And T 外2 ≤T 外 ≤T 外3 At that time, the compressor frequency is controlled to operate at F. 6C The external fan speed is running at R 外6C The internal fan speed is running at R 内6C The throttle valve opening is at B. 6C ;

[0147] When T 内 <T 内1 And T 外3 <T 外 At that time, the compressor frequency is controlled to operate at F. 7C The external fan speed is running at R 外7C The internal fan speed is running at R 内7C The throttle valve opening is at B. 7C ;

[0148] When T 内1 ≤T 内 ≤T 内2 And T 外3 <T 外 At that time, the compressor frequency is controlled to operate at F. 8C The external fan speed is running at R 外8C The internal fan speed is running at R 内8C The throttle valve opening is at B. 8C ;

[0149] When T 内2 <T 内 And T 外3 <T 外 At that time, the compressor frequency is controlled to operate at F. 9C The external fan speed is running at R 外9C The internal fan speed is running at R 内9C The throttle valve opening is at B. 9C ;

[0150] Where F 1C <F 4C F 7C <F 4C F 1C <F 2C <F 3C R 外1C <R 外4C<R 外7C R 外1C <R 外2C <R 外3C R 内1C >R 内4C >R 内7C R 内1C >R 内2C >R 内3C B 1C <B 4C <B 7C B 1C <B 2C <B 3C .

[0151] In cooling mode, the temperature changes with the outdoor ambient temperature (F). 1C <F 4C F 7C <F 4C When the outdoor ambient temperature is too high or too low, the compressor frequency should not be too high. If the compressor frequency is too high, liquid may return at low temperatures, and the pressure may become too high at high temperatures. The frequency should be adjusted according to the indoor ambient temperature. 1C <F 2C <F 3C .

[0152] In one embodiment, the refrigerant addition method further includes:

[0153] Obtain the compressor discharge temperature and external pipe temperature;

[0154] The obtained compressor discharge temperature and external pipe temperature are compared with the preset discharge temperature and external pipe temperature.

[0155] Determine whether the additional refrigerant amount is sufficient based on the comparison results.

[0156] In one embodiment, the step of determining whether the additional refrigerant amount is sufficient based on the comparison result includes:

[0157] Determine whether the external pipe temperature has reached the preset external pipe temperature;

[0158] If the preset external pipe temperature is reached, the solenoid valve 16 is closed and held for time t2.

[0159] Determine whether the compressor exhaust temperature is less than or equal to the preset exhaust temperature;

[0160] If the refrigerant temperature is less than or equal to the preset exhaust temperature, it is determined that the refrigerant addition is sufficient, the refrigerant addition is stopped, and the solenoid valve 16 is closed.

[0161] If the exhaust temperature is higher than the preset temperature, it is determined that the refrigerant addition is insufficient. Continue to add refrigerant until the external pipe temperature is a℃ lower than the preset external pipe temperature. Then, close the solenoid valve 16 again and continue for time t3.

[0162] The process then proceeds to determine if the compressor discharge temperature is less than or equal to the preset discharge temperature. After time t2, the discharge temperature is again checked to see if it is less than or equal to the preset value in Table 2. If it is less than or equal to the preset value in Table 2, the refrigerant addition ends, solenoid valve 16 is closed, a warning sound is emitted, and the air conditioner is turned off. If the discharge temperature is still higher than the preset value in Table 2, the aforementioned actions are repeated, but the external pipe temperature must be 2a℃ lower than the preset value in Table 2, and so on.

[0163] In one embodiment, if the external pipe temperature is x*a℃ lower than the preset external pipe temperature, and the compressor discharge temperature is still higher than the preset discharge temperature and the compressor power is greater than the preset power, the refrigerant addition is stopped, the solenoid valve 16 is closed, and the air conditioner is turned off.

[0164] Table 2

[0165]

[0166]

[0167] Referring to Table 2, in one embodiment, the step of comparing the obtained compressor discharge temperature and external pipe temperature with preset discharge temperature and external pipe temperature includes:

[0168] When T 内 <T 内1 And T 外1 <T 外 <T 外2 At that time, the preset exhaust temperature is T. 排1C The preset external tube temperature is T. 外管1 The preset compressor power is P. C1 ;

[0169] When T 内1 ≤T 内 ≤T 内2 And T 外1 <T 外 <T 外2 At that time, the preset exhaust temperature is T. 排2C The preset external tube temperature is T. 外管2 The preset compressor power is P. C2 ;

[0170] When T 内2 <T 内 And T 外1 <T 外 <T 外2 At that time, the preset exhaust temperature is T. 排3C The preset external tube temperature is T. 外管3 The preset compressor power is P.C3 ;

[0171] When T 内 <T 内1 And T 外2 ≤T 外 ≤T 外3 At that time, the preset exhaust temperature is T. 排4C The preset external tube temperature is T. 外管4 The preset compressor power is P. C4 ;

[0172] When T 内1 ≤T 内 ≤T 内2 And T 外2 ≤T 外 ≤T 外3 At that time, the preset exhaust temperature is T. 排5C The preset external tube temperature is T. 外管5 The preset compressor power is P. C5 ;

[0173] When T 内2 <T 内 And T 外2 ≤T 外 ≤T 外3 At that time, the preset exhaust temperature is T. 排6C The preset external tube temperature is T. 外管6 The preset compressor power is P. C6 ;

[0174] When T 内 <T 内1 And T 外3 <T 外 At that time, the preset exhaust temperature is T. 排7C The preset external tube temperature is T. 外管7 The preset compressor power is P. C7 ;

[0175] When T 内1 ≤T 内 ≤T 内2 And T 外3 <T 外 At that time, the preset exhaust temperature is T. 排8C The preset external tube temperature is T. 外管8 The preset compressor power is P. C8 ;

[0176] When T 内2 <T 内 And T 外3 <T 外 At that time, the preset exhaust temperature is T. 排9C The preset external tube temperature is T.外管9 The preset compressor power is P. C9 ;

[0177] Where T 排1C <T 排4C <T 排7C T 外管1 <T 外管4 <T 外管7 P C1 <P C4 <P C7 T 排1C <T 排2C <T 排3C T 外管1 <T 外管2 <T 外管3 P C1 <P C2 <P C3 .

[0178] In cooling mode, when the unit's connecting pipe is long, the connecting pipe length can be selected when entering refrigerant charging mode. The relevant parameters in Table 2 should be adjusted accordingly based on the connecting pipe length.

[0179] In one embodiment, the step of controlling the air conditioner to enter the refrigerant charging mode according to the heating mode includes:

[0180] Obtain indoor ambient temperature;

[0181] The operating parameters of compressor 1, throttle valve 9, outdoor fan 5, and indoor fan 14 are determined based on the indoor and outdoor ambient temperatures.

[0182] Control the compressor 1, throttle valve 9, external fan 5, and internal fan 14 to run for t4 time according to the determined operating parameters;

[0183] Open solenoid valve 16 to begin adding refrigerant into the air conditioner.

[0184] In heating mode and refrigerant replenishment mode, compressor 1, throttle valve 9, outdoor fan 5, and indoor fan 14 operate according to the parameters in Table 3.

[0185] Table 3

[0186]

[0187] In heating mode, the temperature F changes with the outdoor ambient temperature. 1H <F 4H <F 7H When the outdoor ambient temperature is low, the compressor frequency should not be too high to prevent frost buildup on the heat exchanger, which could affect the exhaust temperature. The frequency should also vary with the indoor ambient temperature. 1H >F 2H >F 3HWhen the indoor temperature is too high, the compressor frequency should not be too high to prevent the compressor exhaust temperature from being too high.

[0188] In one embodiment, the steps of determining the operating parameters of compressor 1, throttle valve 9, outdoor fan 5, and indoor fan 14 based on indoor and outdoor ambient temperatures include:

[0189] When T 内 <T 内3 And T 外 ≤T 外5 At that time, the compressor frequency is controlled to operate at F. 1H The external fan speed is running at R 外1H The internal fan speed is running at R 内3H The throttle valve opening is at B. 1H ;

[0190] When T 内3 ≤T 内 ≤T 内4 And T 外 ≤T 外5 At that time, the compressor frequency is controlled to operate at F. 2H The external fan speed is running at R 外2H The internal fan speed is running at R 内4H The throttle valve opening is at B. 2H ;

[0191] When T 内4 <T 内 And T 外 ≤T 外5 At that time, the compressor frequency is controlled to operate at F. 3H The external fan speed is running at R 外3H The internal fan speed is running at R 内3H The throttle valve opening is at B. 3H ;

[0192] When T 内 <T 内3 And T 外5 <T 外 <T 外4 At that time, the compressor frequency is controlled to operate at F. 4H The external fan speed is running at R 外4H The internal fan speed is running at R 内4H The throttle valve opening is at B. 4H ;

[0193] When T 内3 ≤T 内 ≤T 内4 And T 外5 <T 外 <T 外4At that time, the compressor frequency is controlled to operate at F. 5H The external fan speed is running at R 外5H The internal fan speed is running at R 内5H The throttle valve opening is at B. 5H ;

[0194] When T 内4 <T 内 And T 外5 <T 外 <T 外4 At that time, the compressor frequency is controlled to operate at F. 6H The external fan speed is running at R 外6H The internal fan speed is running at R 内6H The throttle valve opening is at B. 6H ;

[0195] When T 内 <T 内3 And T 外4 ≤T 外 ≤T 外1 At that time, the compressor frequency is controlled to operate at F. 7H The external fan speed is running at R 外7H The internal fan speed is running at R 内7H The throttle valve opening is at B. 7H ;

[0196] When T 内3 ≤T 内 ≤T 内4 And T 外4 ≤T 外 ≤T 外1 At that time, the compressor frequency is controlled to operate at F. 8H The external fan speed is running at R 外8H The internal fan speed is running at R 内8H The throttle valve opening is at B. 8H ;

[0197] When T 内4 <T 内 And T 外4 ≤T 外 ≤T 外1 At that time, the compressor frequency is controlled to operate at F. 9H The external fan speed is running at R 外9H The internal fan speed is running at R 内9H The throttle valve opening is at B. 9H ;

[0198] Where F 1H <F 4H <F 7H F 3H <F 2H<F 1H R 外7H <R 外4H <R 外1H R 外3H <R 外2H <R 外1H R 内1H <R 内4H <R 内7H R 内1H <R 内2H <R 内3H B 1H <B 4H <B 7H B 1H <B 2H <B 3H .

[0199] In heating mode, the temperature F changes with the outdoor ambient temperature. 1H <F 4H <F 7H When the outdoor ambient temperature is low, the compressor frequency should not be too high to prevent frost buildup on the heat exchanger, which could affect the exhaust temperature. The frequency should also vary with the indoor ambient temperature. 1H >F 2H >F 3H When the indoor temperature is too high, the compressor frequency should not be too high to prevent the compressor exhaust temperature from being too high.

[0200] In one embodiment, the refrigerant addition method further includes:

[0201] Obtain the compressor discharge temperature and internal pipe temperature;

[0202] The obtained compressor discharge temperature and inner pipe temperature are compared with the preset discharge temperature and inner pipe temperature.

[0203] Determine whether the additional refrigerant amount is sufficient based on the comparison results.

[0204] In one embodiment, the step of determining whether the additional refrigerant amount is sufficient based on the comparison result includes:

[0205] Determine whether the inner tube temperature has reached the preset inner tube temperature;

[0206] If the preset inner tube temperature is reached, the solenoid valve 16 is closed and held for time t5.

[0207] Determine whether the compressor exhaust temperature is less than or equal to the preset exhaust temperature;

[0208] If the refrigerant temperature is less than or equal to the preset exhaust temperature, it is determined that the refrigerant addition is sufficient, the refrigerant addition is stopped, and the solenoid valve 16 is closed.

[0209] If the temperature exceeds the preset exhaust temperature, it is determined that the refrigerant addition is insufficient. Continue to add refrigerant until the inner pipe temperature is b℃ lower than the preset inner pipe temperature. Then, close the solenoid valve 16 again and continue for t6 time.

[0210] The system then proceeds to determine if the compressor discharge temperature is less than or equal to the preset discharge temperature. If it is less than or equal to the preset value in Table 4, the refrigerant addition process ends, solenoid valve 16 closes, a warning sound is emitted, and the air conditioner shuts off. If the discharge temperature is still higher than the preset value in Table 4, the aforementioned steps are repeated, but the internal pipe temperature must be 2*b℃ lower than the value in the table below, and so on.

[0211] In one embodiment, if the inner pipe temperature is y*b℃ lower than the preset inner pipe temperature, and the compressor discharge temperature is still higher than the preset discharge temperature and the compressor power is greater than the preset power, the refrigerant addition is stopped, the solenoid valve 16 is closed, and the air conditioner is turned off.

[0212] Table 4

[0213]

[0214] Referring to Table 4, in one embodiment, the step of comparing the obtained compressor discharge temperature and inner pipe temperature with preset discharge temperature and inner pipe temperature includes:

[0215] When T 内 <T 内3 And T 外 ≤T 外5 At that time, the preset exhaust temperature is T. 排1H The preset inner tube temperature is T. 内管1 The preset compressor power is P. H1 ;

[0216] When T 内3 ≤T 内 ≤T 内4 And T 外 ≤T 外5 At that time, the preset exhaust temperature is T. 排2H The preset inner tube temperature is T. 内管2 The preset compressor power is P. H2 ;

[0217] When T 内4 <T 内 And T 外 ≤T 外5 At that time, the preset exhaust temperature is T. 排3H The preset inner tube temperature is T. 内管3 The preset compressor power is P. H3 ;

[0218] When T 内 <T内3 And T 外5 <T 外 <T 外4 At that time, the preset exhaust temperature is T. 排4H The preset inner tube temperature is T. 内管4 The preset compressor power is P. H4 ;

[0219] When T 内3 ≤T 内 ≤T 内4 And T 外5 <T 外 <T 外4 At that time, the preset exhaust temperature is T. 排5H The preset inner tube temperature is T. 内管5 The preset compressor power is P. H5 ;

[0220] When T 内4 <T 内 And T 外5 <T 外 <T 外4 At that time, the preset exhaust temperature is T. 排6H The preset inner tube temperature is T. 内管6 The preset compressor power is P. H6 ;

[0221] When T 内 <T 内3 And T 外4 ≤T 外 ≤T 外1 At that time, the preset exhaust temperature is T. 排7H The preset inner tube temperature is T. 内管7 The preset compressor power is P. H7 ;

[0222] When T 内3 ≤T 内 ≤T 内4 And T 外4 ≤T 外 ≤T 外1 At that time, the preset exhaust temperature is T. 排8H The preset inner tube temperature is T. 内管8 The preset compressor power is P. H8 ;

[0223] When T 内4 <T 内 And T 外4 ≤T 外 ≤T 外1 At that time, the preset exhaust temperature is T. 排9H The preset inner tube temperature is T. 内管9The preset compressor power is P. H9 ;

[0224] Where T 排1H <T 排4H <T 排7H T 内管1 <T 内管4 <T 内管7 P H1 <P H4 <P H7 , 排1H <T 排2H <T 排3H T 内管1 <T 内管2 <T 内管3 P H1 <P H2 <P H3 .

[0225] In heating mode, when the unit's connecting pipe is long, the connecting pipe length can be selected when entering the refrigerant addition mode. The relevant parameters in Table 4 should be adjusted accordingly based on the connecting pipe length.

[0226] The refrigerant addition method of this invention has the following effects:

[0227] It can automatically determine the appropriate level of refrigerant to add to the air conditioner, avoiding problems such as poor cooling effect and high compressor discharge temperature when too little refrigerant is added. At the same time, it can also prevent problems such as compressor oil shortage and damage when too much refrigerant is added.

[0228] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0229] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A method for adding refrigerant to an air conditioner, characterized in that, include: Obtain the outdoor ambient temperature; Compare the outdoor ambient temperature with the preset temperature; When the outdoor ambient temperature is greater than or equal to the preset temperature, the air conditioner is controlled to enter the refrigerant charging mode according to the cooling mode. When the outdoor ambient temperature is lower than the preset temperature, the air conditioner will switch to refrigerant charging mode in heating mode. The steps to control the air conditioner to switch from cooling mode to refrigerant charging mode include: Obtain indoor ambient temperature; The operating parameters of the compressor, throttle valve, outdoor fan, and indoor fan are determined based on the indoor and outdoor ambient temperatures. Control the compressor, throttle valve, outdoor fan, and indoor fan to run for time t1 according to the determined operating parameters; Open the solenoid valve to begin adding refrigerant into the air conditioner; The steps for determining the operating parameters of the compressor, throttle valve, outdoor fan, and indoor fan based on the indoor and outdoor ambient temperatures include: When T 内 <T 内1 And T 外1 <T 外 <T 外2 At that time, the compressor frequency is controlled to operate at F. 1C The external fan speed is running at R 外1C The internal fan speed is running at R 内1C The throttle valve opening is at B. 1C ; When T 内1 ≤T 内 ≤T 内2 And T 外1 <T 外 <T 外2 At that time, the compressor frequency is controlled to operate at F. 2C The external fan speed is running at R 外2C The internal fan speed is running at R 内2C The throttle valve opening is at B. 2C ; When T 内2 <T 内 And T 外1 <T 外 <T 外2 At that time, the compressor frequency is controlled to operate at F. 3C The external fan speed is running at R 外3C The internal fan speed is running at R 内3C The throttle valve opening is at B. 3C ; When T 内 <T 内1 And T 外2 ≤T 外 ≤T 外3 At that time, the compressor frequency is controlled to operate at F. 4C The external fan speed is running at R 外4C The internal fan speed is running at R 内4C The throttle valve opening is at B. 4C ; When T 内1 ≤T 内 ≤T 内2 And T 外2 ≤T 外 ≤T 外3 At that time, the compressor frequency is controlled to operate at F. 5C The external fan speed is running at R 外5C The internal fan speed is running at R 内5C The throttle valve opening is at B. 5C ; When T 内2 <T 内 And T 外2 ≤T 外 ≤T 外3 At that time, the compressor frequency is controlled to operate at F. 6C The external fan speed is running at R 外6C The internal fan speed is running at R 内6C The throttle valve opening is at B. 6C ; When T 内 <T 内1 And T 外3 <T 外 At that time, the compressor frequency is controlled to operate at F. 7C The external fan speed is running at R 外7C The internal fan speed is running at R 内7C The throttle valve opening is at B. 7C ; When T 内1 ≤T 内 ≤T 内2 And T 外3 <T 外 At that time, the compressor frequency is controlled to operate at F. 8C The external fan speed is running at R 外8C The internal fan speed is running at R 内8C The throttle valve opening is at B. 8C ; When T 内2 <T 内 And T 外3 <T 外 At that time, the compressor frequency is controlled to operate at F. 9C The external fan speed is running at R 外9C The internal fan speed is running at R 内9C The throttle valve opening is at B. 9C ; Among which F 1C <F 4C ,F 7C <F 4C ,F 1C <F 2C <F 3C ,R 外1C <R 外4C <R 外7C ,R 外1C <R 外2C <R 外3C ,R 内1C >R 内4C >R 内7C [[ID=3Z]],R 内1C >R 内2C >R 内3C ,B 1C <B 4C [[ID=U]]<B 7C ,B 1C <B 2C ]><B 3C 。 It should be noted that there seems to be an error in the original text where "<B " is repeated as "<B " in line 42. I have translated it as it is, but it might need to be corrected in the original source for a more accurate meaning. Also, "<B " in line 41 is translated as "<B " as it's not clear if there's a specific error there or if it's just a formatting issue. And there's an unclear "<B " in line 42 which is translated as "<B " for the same reason. Additionally, there's an unclear "<B " in line 47 which is translated as "<B " for the same reason. If these are actual errors in the original text, they should be rectified for a more meaningful translation.

2. The refrigerant addition method according to claim 1, characterized in that, Methods for adding refrigerant also include: Obtain the compressor discharge temperature and external pipe temperature; The obtained compressor discharge temperature and external pipe temperature are compared with the preset discharge temperature and external pipe temperature. Determine whether the additional refrigerant amount is sufficient based on the comparison results.

3. The refrigerant addition method according to claim 2, characterized in that, The steps to determine whether the additional refrigerant amount is sufficient based on the comparison results include: Determine whether the external pipe temperature has reached the preset external pipe temperature; If the preset external pipe temperature is reached, the solenoid valve is closed and maintained for time t2. Determine whether the compressor exhaust temperature is less than or equal to the preset exhaust temperature; If the refrigerant temperature is less than or equal to the preset exhaust temperature, it is determined that the refrigerant addition is sufficient, the refrigerant addition is stopped, and the solenoid valve is closed. If the exhaust temperature is higher than the preset temperature, it is determined that the refrigerant addition is insufficient. Continue to add refrigerant until the external pipe temperature is a℃ lower than the preset external pipe temperature. Then, close the solenoid valve again and continue for time t3. The process then proceeds to determine whether the compressor exhaust temperature is less than or equal to the preset exhaust temperature.

4. The refrigerant addition method according to claim 3, characterized in that, The next step in determining whether the compressor discharge temperature is less than or equal to the preset discharge temperature includes: After time t2, check again whether the exhaust temperature is lower than the preset exhaust temperature; If the exhaust temperature is still higher than the preset exhaust temperature, it is determined that the refrigerant addition is insufficient. Continue to add refrigerant until the external pipe temperature is 2a℃ lower than the preset external pipe temperature. Then, close the solenoid valve again and continue for time t3. And so on; If the external pipe temperature is x*a℃ lower than the preset external pipe temperature, and the compressor discharge temperature is still higher than the preset discharge temperature and the compressor power is greater than the preset compressor power, then the refrigerant addition will stop, the solenoid valve will be closed, and the air conditioner will be turned off. x=1,2,3…… 5. The refrigerant addition method according to claim 2, characterized in that, The steps for comparing the obtained compressor discharge temperature and external pipe temperature with the preset discharge temperature and external pipe temperature include: When T 内 <T 内1 And T 外1 <T 外 <T 外2 At that time, the preset exhaust temperature is T. 排1C The preset external tube temperature is T. 外管1 The preset compressor power is P. C1 ; When T 内1 ≤T 内 ≤T 内2 And T 外1 <T 外 <T 外2 At that time, the preset exhaust temperature is T. 排2C The preset external tube temperature is T. 外管2 The preset compressor power is P. C2 ; When T 内2 <T 内 And T 外1 <T 外 <T 外2 At that time, the preset exhaust temperature is T. 排3C The preset external tube temperature is T. 外管3 The preset compressor power is P. C3 ; When T 内 <T 内1 And T 外2 ≤T 外 ≤T 外3 At that time, the preset exhaust temperature is T. 排4C The preset external tube temperature is T. 外管4 The preset compressor power is P. C4 ; When T 内1 ≤T 内 ≤T 内2 And T 外2 ≤T 外 ≤T 外3 At that time, the preset exhaust temperature is T. 排5C The preset external tube temperature is T. 外管5 The preset compressor power is P. C5 ; When T 内2 <T 内 And T 外2 ≤T 外 ≤T 外3 At that time, the preset exhaust temperature is T. 排6C The preset external tube temperature is T. 外管6 The preset compressor power is P. C6 ; When T 内 <T 内1 And T 外3 <T 外 At that time, the preset exhaust temperature is T. 排7C The preset external tube temperature is T. 外管7 The preset compressor power is P. C7 ; When T 内1 ≤T 内 ≤T 内2 And T 外3 <T 外 At that time, the preset exhaust temperature is T. 排8C The preset external tube temperature is T. 外管8 The preset compressor power is P. C8 ; When T 内2 <T 内 And T 外3 <T 外 At that time, the preset exhaust temperature is T. 排9C The preset external tube temperature is T. 外管9 The preset compressor power is P. C9 ; where T 排1C <T 排4C <T 排7C , T 外管1 <T 外管4 <T 外管7 , P C1 <P C4 <P C7 , T 排1C <T 排2C <T 排3C , T 外管1 <T 外管2 <T 外管3 , P C1 <P C2 <P C3 .

6. The refrigerant addition method according to claim 1, characterized in that, The steps to control the air conditioner to switch from heating mode to refrigerant charging mode include: Obtain indoor ambient temperature; The operating parameters of the compressor, throttle valve, outdoor fan, and indoor fan are determined based on the indoor and outdoor ambient temperatures. Control the compressor, throttle valve, outdoor fan, and indoor fan to run for t4 time according to the determined operating parameters; Open the solenoid valve to start adding refrigerant into the air conditioner.

7. The refrigerant addition method according to claim 6, characterized in that, The steps for determining the operating parameters of the compressor, throttle valve, outdoor fan, and indoor fan based on the indoor and outdoor ambient temperatures include: When T 内 <T 内3 And T 外 ≤T 外5 At that time, the compressor frequency is controlled to operate at F. 1H The external fan speed is running at R 外1H The internal fan speed is running at R 内3H The throttle valve opening is at B. 1H ; When T 内3 ≤T 内 ≤T 内4 And T 外 ≤T 外5 At that time, the compressor frequency is controlled to operate at F. 2H The external fan speed is running at R 外2H The internal fan speed is running at R 内4H The throttle valve opening is at B. 2H ; When T 内4 <T 内 And T 外 ≤T 外5 At that time, the compressor frequency is controlled to operate at F. 3H The external fan speed is running at R 外3H The internal fan speed is running at R 内3H The throttle valve opening is at B. 3H ; When T 内 <T 内3 And T 外5 <T 外 <T 外4 At that time, the compressor frequency is controlled to operate at F. 4H The external fan speed is running at R 外4H The internal fan speed is running at R 内4H The throttle valve opening is at B. 4H ; When T 内3 ≤T 内 ≤T 内4 And T 外5 <T 外 <T 外4 At that time, the compressor frequency is controlled to operate at F. 5H The external fan speed is running at R 外5H The internal fan speed is running at R 内5H The throttle valve opening is at B. 5H ; When T 内4 <T 内 And T 外5 <T 外 <T 外4 At that time, the compressor frequency is controlled to operate at F. 6H The external fan speed is running at R 外6H The internal fan speed is running at R 内6H The throttle valve opening is at B. 6H ; When T 内 <T 内3 And T 外4 ≤T 外 ≤T 外1 At that time, the compressor frequency is controlled to operate at F. 7H The external fan speed is running at R 外7H The internal fan speed is running at R 内7H The throttle valve opening is at B. 7H ; When T 内3 ≤T 内 ≤T 内4 And T 外4 ≤T 外 ≤T 外1 At that time, the compressor frequency is controlled to operate at F. 8H The external fan speed is running at R 外8H The internal fan speed is running at R 内8H The throttle valve opening is at B. 8H ; When T 内4 <T 内 And T 外4 ≤T 外 ≤T 外1 At that time, the compressor frequency is controlled to operate at F. 9H The external fan speed is running at R 外9H The internal fan speed is running at R 内9H The throttle valve opening is at B. 9H ; where F 1H <F 4H <F 7H ,F 3H <F 2H <F 1H ,R 外7H <R 外4H <R 外1H ,R 外3H <R 外2H <R 外1H ,R 内1H <R 内4H <R 内7H ,R 内1H <R 内2H <R 内3H ,B 1H <B 4H <B 7H ,B 1H <B 2H <B 3H 。 8. The refrigerant addition method according to claim 7, characterized in that, Methods for adding refrigerant also include: Obtain the compressor discharge temperature and internal pipe temperature; The obtained compressor discharge temperature and inner pipe temperature are compared with the preset discharge temperature and inner pipe temperature. Determine whether the additional refrigerant amount is sufficient based on the comparison results.

9. The refrigerant addition method according to claim 8, characterized in that, The steps to determine whether the additional refrigerant amount is sufficient based on the comparison results include: Determine whether the inner tube temperature has reached the preset inner tube temperature; If the preset inner tube temperature is reached, the solenoid valve will be closed and maintained for time t5. Determine whether the compressor exhaust temperature is less than or equal to the preset exhaust temperature; If the refrigerant temperature is less than or equal to the preset exhaust temperature, it is determined that the refrigerant addition is sufficient, the refrigerant addition is stopped, and the solenoid valve is closed. If the temperature exceeds the preset exhaust temperature, it is determined that the refrigerant addition is insufficient. Continue to add refrigerant until the inner pipe temperature is b℃ lower than the preset inner pipe temperature. Then, close the solenoid valve again and continue for time t6. The process then proceeds to determine whether the compressor exhaust temperature is less than or equal to the preset exhaust temperature.

10. The refrigerant addition method according to claim 9, characterized in that, The next step in determining whether the compressor discharge temperature is less than or equal to the preset discharge temperature includes: After time t5, check again whether the compressor exhaust temperature is less than or equal to the preset exhaust temperature; If the compressor's discharge temperature is still higher than the preset discharge temperature, it is determined that the refrigerant addition is insufficient. Continue to add refrigerant until the inner pipe temperature is 2*b℃ lower than the preset inner pipe temperature. Then, close the solenoid valve again and continue for time t6. And so on; If the internal pipe temperature is y*b℃ lower than the preset internal pipe temperature, and the compressor discharge temperature is still higher than the preset discharge temperature and the compressor power is greater than the preset compressor power, then the refrigerant addition will stop, the solenoid valve will be closed, and the air conditioner will be turned off. y=1,2,3…… 11. The refrigerant addition method according to claim 8, characterized in that, The steps for comparing the obtained compressor discharge temperature and inner pipe temperature with the preset discharge temperature and inner pipe temperature include: When T 内 <T 内3 And T 外 ≤T 外5 At that time, the preset exhaust temperature is T. 排1H The preset inner tube temperature is T. 内管1 The preset compressor power is P. H1 ; When T 内3 ≤T 内 ≤T 内4 And T 外 ≤T 外5 At that time, the preset exhaust temperature is T. 排2H The preset inner tube temperature is T. 内管2 The preset compressor power is P. H2 ; When T 内4 <T 内 And T 外 ≤T 外5 At that time, the preset exhaust temperature is T. 排3H The preset inner tube temperature is T. 内管3 The preset compressor power is P. H3 ; When T 内 <T 内3 And T 外5 <T 外 <T 外4 At that time, the preset exhaust temperature is T. 排4H The preset inner tube temperature is T. 内管4 The preset compressor power is P. H4 ; When T 内3 ≤T 内 ≤T 内4 And T 外5 <T 外 <T 外4 At that time, the preset exhaust temperature is T. 排5H The preset inner tube temperature is T. 内管5 The preset compressor power is P. H5 ; When T 内4 <T 内 And T 外5 <T 外 <T 外4 At that time, the preset exhaust temperature is T. 排6H The preset inner tube temperature is T. 内管6 The preset compressor power is P. H6 ; When T 内 <T 内3 And T 外4 ≤T 外 ≤T 外1 At that time, the preset exhaust temperature is T. 排7H The preset inner tube temperature is T. 内管7 The preset compressor power is P. H7 ; When T 内3 ≤T 内 ≤T 内4 And T 外4 ≤T 外 ≤T 外1 At that time, the preset exhaust temperature is T. 排8H The preset inner tube temperature is T. 内管8 The preset compressor power is P. H8 ; When T 内4 <T 内 And T 外4 ≤T 外 ≤T 外1 At that time, the preset exhaust temperature is T. 排9H The preset inner tube temperature is T. 内管9 The preset compressor power is P. H9 ; where T 排1H <T 排4H <T 排7H , T 内管1 <T 内管4 <T 内管7 , P H1 <P H4 <P H7 , 排1H <T 排2H <T 排3H , T 内管1 <T 内管2 <T 内管3 , P H1 <P H2 <P H3 .

12. An air conditioner, characterized in that, The refrigerant addition method according to any one of claims 1 to 11 is applied.

13. The air conditioner according to claim 12, characterized in that, The air conditioner includes an air inlet pipe and a refrigerant charging device. The refrigerant charging device is connected to the air inlet pipe. The refrigerant charging device includes a charging pipeline, a solenoid valve (16), and a speed control device (17). The solenoid valve (16) and the speed control device (17) are both located on the charging pipeline.

14. A storage medium, characterized in that, A method for adding refrigerant to an air conditioner according to any one of claims 1 to 11.

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