AIR CONDITIONER OUTDOOR UNIT, REFRIGERANT CHARGING METHOD, DEVICE, AND STORAGE MEDIUM

Description

CROSS-REFERENCE TO RELATED APPLICATION

This application claims priority to Chinese Patent Application No. 202411571216.3, filed with China National Intellectual Property Administration on Nov. 5, 2024 and entitled “AIR CONDITIONER OUTDOOR UNIT, REFRIGERANT CHARGING METHOD, DEVICE, AND STORAGE MEDIUM”, the entire contents of which are incorporated herein by reference for all purposes. No new matter has been introduced.

FIELD

The present disclosure relates to the technical field of air conditioners, and in particular, to an air conditioner outdoor unit, a refrigerant charging method, a computing device, an electronic device, and a computer-readable storage medium.

BACKGROUND

In the related art, a refrigerant pipeline between a one-way valve and a first shutoff valve is in maintained in a closed state to form a blind pipe section. Charging of refrigerant in an air conditioner is performed in this blind pipe section of the air conditioner outdoor unit. However, if an excessive amount of refrigerant is charged into the blind pipe section, and the air conditioner outdoor unit is exposed to high temperature during transportation, the air pressure generated by the excessive refrigerant is likely to exceed the pressure-bearing capacity of the blind pipe section, leading to pipe burst and subsequent damage to the air conditioner outdoor unit.

SUMMARY

Embodiments of the present disclosure provide an air conditioner outdoor unit, a refrigerant charging method, a computing device, an electronic device, and a computer-readable storage medium, which can solve a problem that the air conditioner outdoor unit is prone to pipe burst when exposed to high temperature during transportation due to the excessive refrigerant charged in the blind pipe section.

The air conditioner outdoor unit provided according to the embodiments of the present disclosure includes a compressor, a one-way valve, a heat exchanger, and a first shutoff valve. The compressor has an output port connected to the heat exchanger through the one-way valve, and an input port connected to the first shutoff valve. A first pipeline is arranged between the one-way valve and the heat exchanger. A second pipeline is arranged between the compressor and the first shutoff valve. Each of the first pipeline, the second pipeline, and the compressor is configured to contain a refrigerant.

In this way, under the same refrigerant charging amount, the above-mentioned air conditioner outdoor unit may store the refrigerant separately in the first pipeline, and in the second pipeline and the compressor. In this way, during the transportation of the air conditioner outdoor unit, a pressure generated when the refrigerant in the air conditioner outdoor unit is exposed to high temperature is lower than a pressure-bearing capacity of the refrigerant pipeline, which can reduce the occurrence of pipe burst and avoid damage to the air conditioner outdoor unit.

In some embodiments, a liquid level of the refrigerant in the compressor is lower than an air inlet of the compressor.

In this way, by setting the liquid level of the refrigerant in the compressor to be lower than the air inlet of the compressor, a liquid refrigerant can be prevented from entering the air inlet and causing liquid slugging in the compressor.

The refrigerant charging method according to the embodiments of the present disclosure is applied to an air conditioner outdoor unit. The air conditioner outdoor unit includes a compressor, a one-way valve, a heat exchanger, and a first shutoff valve. The compressor has an output port connected to the heat exchanger through the one-way valve, and an input port connected to the first shutoff valve. The refrigerant charging method includes: obtaining a first refrigerant density and a first volume of a first pipeline, the first pipeline being arranged between the one-way valve and the heat exchanger; determining a first refrigerant charging amount for the first pipeline based on the first volume and the first refrigerant density; obtaining a second refrigerant density, an internal volume of the compressor, and a second volume of a second pipeline, the second pipeline being arranged between the compressor and the first shutoff valve; and determining a second refrigerant charging amount for the compressor and the second pipeline based on the second volume, the internal volume of the compressor, and the second refrigerant density.

In this way, by separately charging a required refrigerant amount of the air conditioner outdoor unit into the first pipeline and into the compressor and the second pipeline, an amount of the refrigerant charged into the first pipeline can be reduced, reducing the occurrence of pipe burst caused when the air conditioner outdoor unit is exposed to high temperature during transportation and avoiding the damage to the air conditioner outdoor unit.

In some embodiments, the obtaining the first refrigerant density includes: obtaining a maximum ambient temperature for a refrigerant in the first pipeline and a withstand pressure at a most pressure-vulnerable part of the first pipeline; and determining the first refrigerant density based on the maximum ambient temperature, the withstand pressure, and a first predetermined mapping relationship among temperature, pressure, and density.

In this way, by substituting the maximum ambient temperature for the refrigerant in the first pipeline and the withstand pressure at the most pressure-vulnerable part of the first pipeline into the predetermined mapping relationship among temperature, pressure, and density to determine the density of the refrigerant in the first pipeline, the first refrigerant density can be accurately obtained.

In some embodiments, the first predetermined mapping relationship includes a state equation representing a variation of a refrigerant density with an ambient temperature and a withstand pressure, or a table showing the variation of the refrigerant density with the ambient temperature and the withstand pressure.

In this way, by substituting the maximum ambient temperature for the refrigerant in the first pipeline and the withstand pressure at the most pressure-vulnerable part of the first pipeline into the predetermined state equation or querying the predetermined table, efficiency of determining the first refrigerant density can be improved.

In some embodiments, the obtaining the second refrigerant density includes: obtaining a maximum ambient temperature for a refrigerant in the second pipeline and a withstand pressure at a most pressure-vulnerable part of the second pipeline; and determining the second refrigerant density based on the maximum ambient temperature, the withstand pressure, and a second predetermined mapping relationship among temperature, pressure, and density.

In this way, by substituting the maximum ambient temperature for the refrigerant in the second pipeline and the withstand pressure at the most pressure-vulnerable part of the second pipeline into the predetermined mapping relationship among temperature, pressure, and density to determine the density of the refrigerant in the second pipeline, the second refrigerant density can be accurately obtained.

In some embodiments, the second predetermined mapping relationship includes a state equation representing a variation of a refrigerant density with an ambient temperature and a withstand pressure, or a table showing the variation of the refrigerant density with the ambient temperature and the withstand pressure.

In this way, by substituting the maximum ambient temperature for the refrigerant in the second pipeline and the withstand pressure at the most pressure-vulnerable part of the second pipeline into the predetermined state equation or querying the predetermined table, efficiency of determining the second refrigerant density can be improved.

The refrigerant charging method according to the embodiments of the present disclosure is applied to an air conditioner outdoor unit. The air conditioner outdoor unit includes a compressor, a one-way valve, a heat exchanger, and a first shutoff valve. The compressor has an output port connected to the heat exchanger through the one-way valve, and an input port connected to the first shutoff valve. A first pipeline is arranged between the one-way valve and the heat exchanger, and a second pipeline is arranged between the compressor and the first shutoff valve. The refrigerant charging method includes: obtaining a predetermined cooling capacity range of the air conditioner outdoor unit; and determining a first refrigerant charging amount for the first pipeline and a second refrigerant charging amount for the compressor and the second pipeline based on the predetermined cooling capacity range, and a third predetermined mapping relationship between a cooling capacity range and a refrigerant charging amount.

In this way, by determining the first refrigerant charging amount for the first pipeline and the second refrigerant charging amount for the compressor and the second pipeline based on the predetermined mapping relationship between the predetermined cooling capacity range of the air conditioner outdoor unit and the refrigerant charging amount, efficiency of determining the first refrigerant charging amount and the second refrigerant charging amount can be improved.

The computing device according to the embodiments of the present disclosure includes a processor and a memory. The memory has a computer program stored thereon. The computer program, when executed by the processor, causes the processor to implement steps of the refrigerant charging method as described according to any one of the above embodiments.

The electronic device according to the embodiments of the present disclosure includes the computing device as described according to the above embodiments.

The computer-readable storage medium according to the embodiments of the present disclosure has a computer program stored thereon. The computer program, when executed by a processor, causes the processor to implement steps of the refrigerant charging method as described according to any one of the above embodiments.

Additional aspects and advantages of the present disclosure will be provided in part in the following description, or will become apparent in part from the following description, or can be learned from practicing of the present disclosure.

BRIEF DESCRIPTION OF THE DRAWINGS

The above and/or additional aspects and advantages of the present disclosure will become more apparent and more understandable from the description of embodiments taken in conjunction with the accompanying drawings, in which:

FIG. 1 is a schematic structural view of an air conditioner outdoor unit according to some embodiments of the present disclosure;

FIG. 2 is another schematic structural view of an air conditioner outdoor unit according to some embodiments of the present disclosure;

FIG. 3 is yet another schematic structural view of an air conditioner outdoor unit according to some embodiments of the present disclosure;

FIG. 4 is a schematic flowchart of a refrigerant charging method according to some embodiments of the present disclosure;

FIG. 5 is a schematic structural diagram of an electronic device according to some embodiments of the present disclosure;

FIG. 6 to FIG. 8 are schematic flowcharts of a refrigerant charging method according to some embodiments of the present disclosure; and

FIG. 9 is a schematic diagram of a connection state between a computer-readable storage medium and a processor according to some embodiments of the present disclosure.

DESCRIPTION OF REFERENCE NUMERALS

100, air conditioner outdoor unit; 10, compressor; 11, output port; 12, input port; 13, air inlet; 14, gas-liquid separator; 15, compressor body; 20, one-way valve; 30, heat exchanger; 40, first shutoff valve; 50, first pipeline; 60, second pipeline; 70, second shutoff valve; 200, computing device; 210, processor; 220, memory; 221, computer program; 300, computer-readable storage medium; 400, electronic device.

DETAILED DESCRIPTION

The embodiments of the present disclosure will be described in detail below with reference to examples thereof as illustrated in the accompanying drawings, throughout which same or similar elements, or elements having same or similar functions, are denoted by same or similar reference numerals. The embodiments described below with reference to the drawings are illustrative only, and are intended to explain, rather than limiting, the present disclosure.

Referring to FIG. 1, FIG. 2, and FIG. 3, an air conditioner outdoor unit 100 provided according to the embodiments of the present disclosure includes a compressor 10, a one-way valve 20, a heat exchanger 30, and a first shutoff valve 40. The compressor 10 has an output port 11 connected to the heat exchanger 30 through the one-way valve 20, and an input port 12 connected to the first shutoff valve 40. A first pipeline 50 is arranged between the one-way valve 20 and the heat exchanger 30, and a second pipeline 60 is arranged between the compressor 10 and the first shutoff valve 40. Each of the first pipeline 50, the second pipeline 60, and the compressor 10 is configured to contain a refrigerant.

In this way, under the condition of the same refrigerant charging amount, the above-mentioned air conditioner outdoor unit 100 may store the refrigerant separately in the first pipeline 50, the second pipeline 60, and the compressor 10. In this way, during transportation of the air conditioner outdoor unit 100, a pressure generated when the refrigerant in the air conditioner outdoor unit 100 is exposed to high temperature is lower than a pressure-bearing capacity of a refrigerant pipeline, which can reduce the occurrence of pipe burst and avoid damage to the air conditioner outdoor unit 100.

The air conditioner outdoor unit 100 and an air conditioner indoor unit form an air conditioner, which functions to directly provide treated air to a closed room, space, or region. The air conditioner is capable of providing the indoor with functions such as cooling, heating, dehumidification, and air purification. The air conditioner performs cooling and heating processes through changes in a phase state, a temperature, and a pressure of the refrigerant in the air conditioner outdoor unit 100.

When assembly of the air conditioner outdoor unit 100 is completed, the refrigerant needs to be charged into the air conditioner outdoor unit 100. Currently, all of the refrigerant is charged into a blind pipe section formed between the one-way valve 20 and the first shutoff valve 40. However, during the transportation of the air conditioner outdoor unit 100, the first pipeline 50 between the one-way valve 20 and the first shutoff valve 40 is in a closed state, and the air conditioner outdoor unit 100 is easily affected by high temperature during transportation, causing the temperature of the refrigerant to rise and the molecular movement of the refrigerant to accelerate. As a result, the increased air pressure in the first pipeline 50 exceeds the pressure-bearing capacity of the first pipeline 50, leading to pipe burst and damage to the air conditioner outdoor unit 100. Therefore, it is required to reduce the refrigerant charging amount in the blind pipe section to prevent the pressure in the refrigerant pipeline from exceeding the pressure-bearing capacity.

In some embodiments, the air conditioner outdoor unit 100 includes the compressor 10, the one-way valve 20, the heat exchanger 30, and the first shutoff valve 40. The compressor 10 may serve as a power core of the air conditioner outdoor unit 100, and is mainly responsible for circularly compressing the refrigerant to complete air conditioning cycle for cooling or heating. The compressor 10 is capable of compressing an inhaled low-temperature and low-pressure gaseous refrigerant into a high-temperature and high-pressure gaseous refrigerant, to increase the temperature and pressure of the refrigerant and create conditions for condensation at a higher temperature. Then, the high-temperature and high-pressure gaseous refrigerant is delivered to other components of the air conditioner outdoor unit 100 to complete the refrigeration cycle or heating cycle.

The one-way valve 20, also known as a check valve, has the capability of one-way conduction and reverse cut-off. In the air conditioner outdoor unit 100, the compressor 10 is connected to the heat exchanger 30 through the one-way valve 20. In this way, the one-way valve 20 can control forward and reverse flows of the refrigerant, allowing the refrigerant to flow only in the specified direction, i.e., from the compressor 10 to the heat exchanger 30. For example, the one-way valve 20 is capable of preventing the large amount of high-temperature and high-pressure gaseous refrigerant inside the refrigerant pipeline from flowing back to the compressor 10 when the compressor 10 is shut down.

The heat exchanger 30 can realize energy conversion and transfer through an efficient heat exchange process, enabling the refrigerant to absorb and release heat to the greatest extent during its condensation and evaporation processes. The air conditioner outdoor unit 100 further includes a second shutoff valve 70. An end of the second shutoff valve 70 may be connected to the heat exchanger 30, and another end of the second shutoff valve 70 may be connected to the air conditioner indoor unit. The second shutoff valve 70 may be used to control an on-off of a refrigerant pipeline between the heat exchanger 30 and the air conditioner indoor unit. The heat exchanger 30 includes a condenser and an evaporator.

The condenser can dissipate heat and cool down the high-temperature and high-pressure gaseous refrigerant delivered from the compressor 10, condensing it into a high-pressure liquid refrigerant, and deliver heat generated by condensation to different places according to an operating mode of the air conditioner outdoor unit 100. For example, when the operating mode of the air conditioner outdoor unit 100 is a cooling mode, the condenser may dissipate heat generated by condensing the high-pressure and high-temperature gaseous refrigerant into an outdoor environment to complete the refrigeration cycle. When the operating mode of the air conditioner outdoor unit 100 is a heating mode, the condenser may dissipate the heat generated by condensing the high-pressure and high-temperature gaseous refrigerant into an indoor room to complete the heating cycle.

The evaporator can evaporate the liquid refrigerant and deliver heat generated by evaporation to different places according to the operating mode of the air conditioner outdoor unit 100. For example, when the operating mode of the air conditioner outdoor unit 100 is the cooling mode, a low-temperature and low-pressure liquid refrigerant enters the evaporator, and performs heat exchange in the evaporator with indoor air. The refrigerant absorbs heat of the indoor air in the evaporator and evaporates into a low-temperature and low-pressure gaseous refrigerant. Meanwhile, the indoor air is cooled and blown into the room by a fan to achieve a cooling effect. When the operating mode of the air conditioner outdoor unit 100 is the heating mode, the low-temperature and low-pressure liquid refrigerant enters the evaporator, and absorbs heat from an external heat source to evaporate and becomes a high-temperature and low-pressure gaseous refrigerant. Meanwhile, the high-temperature gaseous refrigerant releases heat to the indoor air, increasing a temperature of the indoor air.

The first shutoff valve 40 has an on-off function to precisely control a flow rate of the refrigerant through on-off operation. During the cooling or heating process, the first shutoff valve 40 is capable of adjusting the flow rate of the refrigerant as needed to achieve a desired temperature adjustment effect.

In some embodiments, the output port 11 of the compressor 10 may be connected to the heat exchanger 30 through the one-way valve 20, and the first pipeline 50 is arranged between the one-way valve 20 and the heat exchanger 30. In this way, the high-temperature and high-pressure gaseous refrigerant compressed by the compressor 10 can flow through the one-way valve 20 and the first pipeline 50, and then enter the heat exchanger 30. The input port 12 of the compressor 10 may be connected to the first shutoff valve 40, and the second pipeline 60 is arranged between the compressor 10 and the first shutoff valve 40. In this way, a refrigerant flowing through the first shutoff valve 40 and the second pipeline 60 can enter the compressor 10.

When the assembly of the air conditioner outdoor unit 100 is completed and the refrigerant is to be charged, the refrigerant may be charged into the first pipeline 50, the second pipeline 60, and the compressor 10.

Referring to FIG. 2 and FIG. 3, in some embodiments, a liquid level of the refrigerant in the compressor 10 is lower than an air inlet 13 of the compressor 10.

By setting the liquid level of the refrigerant in the compressor 10 to be lower than the air inlet 13 of the compressor 10, the liquid refrigerant can be prevented from entering the air inlet 13 and causing liquid slugging in the compressor 10.

In some embodiments, the compressor 10 includes an air inlet 13. The air inlet 13 allows the refrigerant in the second pipeline 60 to enter the compressor 10. As shown in FIG. 2, when the assembly of the air conditioner outdoor unit 100 is completed and the refrigerant is charged, it is required to control the amount of the refrigerant charged into the second pipeline 60 to prevent the refrigerant charged into the second pipeline 60 from rising above the air inlet 13 of the compressor 10 and entering the compressor 10, causing the liquid slugging in the compressor 10 and thus resulting in the damage to the compressor 10. It should be noted that, in this case, the input port 12 of the compressor 10 may serve as the air inlet 13 of the compressor 10.

In some embodiments, the compressor 10 includes a gas-liquid separator 14 and a compressor body 15. The gas-liquid separator 14 may be used to separate a gaseous refrigerant and a liquid refrigerant contained in the refrigerant that enters the compressor body 15 through the second pipeline 60. As shown in FIG. 3, the air inlet 13 of the compressor 10 may be arranged in an inner cavity of the gas-liquid separator 14. In this way, a liquid level of the refrigerant in the gas-liquid separator 14 is prevented from rising above the air inlet 13 of the compressor 10 when the refrigerant is charged into the second pipeline 60.

Referring to FIG. 1, FIG. 4, and FIG. 5, a refrigerant charging method provided according to the embodiments of the present disclosure is applied to the air conditioner outdoor unit 100. The air conditioner outdoor unit 100 includes the compressor 10, the one-way valve 20, the heat exchanger 30, and the first shutoff valve 40. The compressor 10 has the output port 11 connected to the heat exchanger 30 through the one-way valve 20, and the input port 12 connected to the first shutoff valve 40. The refrigerant charging method includes following steps 011 to 014.

At step 011, a first refrigerant density and a first volume of the first pipeline 50 are obtained. The first pipeline 50 is arranged between the one-way valve 20 and the heat exchanger 30.

At step 012, a first refrigerant charging amount for the first pipeline 50 is determined based on the first volume and the first refrigerant density.

At step 013, a second refrigerant density, an internal volume of the compressor 10, and a second volume of the second pipeline 60 are obtained. The second pipeline 60 is arranged between the compressor 10 and the first shutoff valve 40.

At step 014, a second refrigerant charging amount for the compressor 10 and the second pipeline 60 is determined based on the second volume, the internal volume of the compressor 10, and the second refrigerant density.

In this way, by separately charging the required refrigerant amount of the air conditioner outdoor unit 100 into the first pipeline 50, and into the compressor 10 and the second pipeline 60, the amount of the refrigerant charged into the first pipeline 50 can be reduced, which reduces the occurrence of pipe burst caused when the air conditioner outdoor unit 100 is exposed to high temperature during transportation, avoiding the damage to the air conditioner outdoor unit 100.

The air conditioner outdoor unit 100 includes the compressor 10, the one-way valve 20, the heat exchanger 30, and the first shutoff valve 40. The output port 11 of the compressor 10 is connected to the heat exchanger 30 through the one-way valve 20, and the input port 12 of the compressor 10 is connected to the first shutoff valve 40. The air conditioner outdoor unit 100 further includes a computing device 200. The computing device 200 includes at least one processor 210 and at least one memory 220 having a computer program 221 stored thereon. The computer program 221, when executed by the processor 210, causes the processor 210 to implement steps of the refrigerant charging method as described above.

In some embodiments, the processor 210 is capable of obtaining the first refrigerant density and the first volume of the first pipeline 50. The first pipeline 50 may be a pipeline for refrigerant flow between the one-way valve 20 and the heat exchanger 30. For example, the processor 210 may obtain the first refrigerant density through a density sensor arranged in the first pipeline 50, and the processor 210 may obtain the density of the refrigerant in the first pipeline 50 by reading data displayed on the density sensor. The processor 210 may obtain the first volume by obtaining diameter data of a pipeline opening of the first pipeline 50 and length data of the first pipeline 50, and calculating the first volume of the first pipeline 50 based on these data.

Then, after the first refrigerant density of the refrigerant in the first pipeline 50 and the first volume are obtained, the processor 210 may determine the first refrigerant charging amount for the first pipeline 50 through calculation.

The processor 210 may obtain the second refrigerant density, the internal volume of the compressor 10, and the second volume of the second pipeline 60. The second pipeline 60 may be a pipeline for refrigerant flow between the compressor 10 and the first shutoff valve 40. For example, the processor 210 may obtain the second refrigerant density through a density sensor arranged in the second pipeline 60, and the processor 210 may obtain the density of the refrigerant in the second pipeline 60 by reading data displayed on the density sensor. The processor 210 may obtain the second volume by obtaining diameter data of a pipeline opening of the second pipeline 60 and length data of the second pipeline 60, and calculating the second volume of the second pipeline 60 based on these data. The processor 210 may obtain the internal volume of the compressor 10 by querying predetermined size data of the compressor 10 in the memory 220.

Then, when the second volume, the internal volume of the compressor 10, and the second refrigerant density are obtained, the processor 210 may determine the second refrigerant charging amount for the compressor 10 and the second pipeline 60 through calculation.

Referring to FIG. 6, in some embodiments, step 011 of obtaining the first refrigerant density includes following steps 0111 and 0112.

At step 0111, a maximum ambient temperature for the refrigerant in the first pipeline 50 and a withstand pressure at a most pressure-vulnerable part of the first pipeline 50 are obtained.

At step 0112, the first refrigerant density is determined based on the maximum ambient temperature, the withstand pressure, and a first predetermined mapping relationship among temperature, pressure, and density.

In this way, by substituting the maximum ambient temperature for the refrigerant in the first pipeline 50 and the withstand pressure at the most pressure-vulnerable part of the first pipeline 50 into the predetermined mapping relationship among temperature, pressure, and density, to determine the density of the refrigerant in the first pipeline 50, the first refrigerant density can be accurately obtained.

In some embodiments, the processor 210 may obtain the first refrigerant density in the first pipeline 50 between the one-way valve 20 and the heat exchanger 30 by obtaining the maximum ambient temperature for the refrigerant in the first pipeline 50 and the withstand pressure at the most pressure-vulnerable part of the first pipeline 50 and determining the first refrigerant density based on the first predetermined mapping relationship among temperature, pressure, and density.

The maximum ambient temperature for the refrigerant in the first pipeline 50 may be obtained by arranging a plurality of temperature sensors in the first pipeline 50, detecting the temperature of the refrigerant through the plurality of temperature sensors, and comparing the collected temperature data to determine the maximum ambient temperature of the refrigerant.

The withstand pressure at the most pressure-vulnerable part of the first pipeline 50 may be obtained by arranging a plurality of pressure sensors in the first pipeline 50, detecting a withstand pressure at a deformed part of the first pipeline 50 through the plurality of pressure sensors, and comparing the collected pressure data, to determine a withstand pressure at a part with the greatest deformation as the withstand pressure at the most pressure-vulnerable part of the first pipeline 50.

When the maximum ambient temperature for the refrigerant and the withstand pressure are obtained, the processor 210 may determine the first refrigerant density in the first pipeline 50 based on the maximum ambient temperature, the withstand pressure, and the first predetermined mapping relationship among temperature, pressure, and density. The first predetermined mapping relationship may be a state equation representing a variation of a refrigerant density with an ambient temperature and a withstand pressure. By substituting the ambient temperature and the withstand pressure into this state equation, the first refrigerant density may be determined. Alternatively, the first predetermined mapping relationship may be a table showing the variation of the refrigerant density with the ambient temperature and the withstand pressure. By querying the table based on values of the ambient temperature and the withstand pressure, the first refrigerant density may be determined.

In this way, by substituting the maximum ambient temperature for the refrigerant in the first pipeline 50 and the withstand pressure at the most pressure-vulnerable part of the first pipeline 50 into the predetermined state equation or querying the predetermined table, efficiency of determining the first refrigerant density can be improved.

Referring to FIG. 7, in some embodiments, step 013 of obtaining the second refrigerant density includes following steps 0131 and 0132.

At step 0131, a maximum ambient temperature for the refrigerant in the second pipeline 60 and a withstand pressure at a most pressure-vulnerable part of the second pipeline 60 are obtained.

At step 0132, the second refrigerant density is determined based on the maximum ambient temperature, the withstand pressure, and a second predetermined mapping relationship among temperature, pressure, and density.

In this way, by substituting the maximum ambient temperature for the refrigerant in the second pipeline 60 and the withstand pressure at the most pressure-vulnerable part of the second pipeline 60 into the predetermined mapping relationship among temperature, pressure, and density, to determine the density of the refrigerant in the second pipeline 60, the second refrigerant density can be accurately obtained.

In some embodiments, the processor 210 may obtain the second refrigerant density in the second pipeline 60 between the compressor 10 and the first shutoff valve 40 by obtaining the maximum ambient temperature for the refrigerant in the second pipeline 60 and the withstand pressure at the most pressure-vulnerable part of the second pipeline 60, and then determining the second refrigerant density based on the second predetermined mapping relationship among temperature, pressure, and density. The maximum ambient temperature for the refrigerant in the second pipeline 60 may be obtained by arranging a plurality of temperature sensors in the second pipeline 60, detecting the temperature of the refrigerant through the plurality of temperature sensors, and comparing the collected temperature data to determine the maximum ambient temperature for the refrigerant.

The withstand pressure at the most pressure-vulnerable part of the second pipeline 60 may be obtained by arranging a plurality of pressure sensors in the second pipeline 60, detecting a withstand pressure at a deformed part of the second pipeline 60 through the plurality of temperature sensors, and comparing the collected pressure data to determine a withstand pressure at a part with the greatest deformation as the withstand pressure at the most pressure-vulnerable part of the second pipeline 60.

After the maximum ambient temperature for the refrigerant and the withstand pressure are obtained, the processor 210 may determine the second refrigerant density in the second pipeline 60 based on the maximum ambient temperature, the withstand pressure, and the second predetermined mapping relationship among temperature, pressure, and density. The second predetermined mapping relationship may be a state equation representing a variation of a refrigerant density with an ambient temperature and a withstand pressure. By substituting the ambient temperature and the withstand pressure into this state equation, the second refrigerant density may be determined. Alternatively, the second predetermined mapping relationship may be a table showing the variation of the refrigerant density with the ambient temperature and the withstand pressure. By querying the table based on values of the ambient temperature and the withstand pressure, the second refrigerant density may be determined.

In this way, by substituting the maximum ambient temperature for the refrigerant in the second pipeline 60 and the withstand pressure at the most pressure-vulnerable part of the second pipeline 60 into the predetermined state equation or querying the predetermined table, efficiency of determining the second refrigerant density can be improved.

Referring to FIG. 1, FIG. 5, and FIG. 8, a refrigerant charging method provided according to the embodiments of the present disclosure is applied in the air conditioner outdoor unit 100. The air conditioner outdoor unit 100 includes the compressor 10, the one-way valve 20, the heat exchanger 30, and the first shutoff valve 40. The compressor 10 has the output port 11 connected to the heat exchanger 30 through the one-way valve 20 and the input port 12 connected to the first shutoff valve 40. The first pipeline 50 is arranged between the one-way valve 20 and the heat exchanger 30, and the second pipeline 60 is arranged between the compressor 10 and the first shutoff valve 40. The refrigerant charging method includes following steps 021 and 022.

At step 021, a predetermined cooling capacity range of the air conditioner outdoor unit 100 is obtained.

At step 022, a first refrigerant charging amount for the first pipeline 50 and a second refrigerant charging amount for the compressor 10 and the second pipeline 60 are determined based on the predetermined cooling capacity range and a third predetermined mapping relationship between a cooling capacity range and a refrigerant charging amount.

In this way, by determining the first refrigerant charging amount for the first pipeline 50 and the second refrigerant charging amount for the compressor 10 and the second pipeline 60 based on the predetermined cooling capacity range of the air conditioner outdoor unit 100 and the predetermined mapping relationship between the cooling capacity range and the refrigerant charging amount, efficiency of determining the first refrigerant charging amount and the second refrigerant charging amount can be improved.

The air conditioner outdoor unit 100 includes the compressor 10, the one-way valve 20, the heat exchanger 30, and the first shutoff valve 40. The output port 11 of the compressor 10 is connected to the heat exchanger 30 through the one-way valve 20, and the input port 12 of the compressor 10 is connected to the first shutoff valve 40.

The air conditioner outdoor unit 100 further includes a computing device 200. The computing device 200 includes a processor 210 and a memory 220 storing a computer program 221. The computer program 221, when executed by the processor 210, implements steps of the refrigerant charging method as described above.

In some embodiments, different air conditioner outdoor units 100 are configured with different cooling capacity ranges, and the refrigerant amount required for different cooling capacity ranges varies. In this way, the first refrigerant charging amount for the first pipeline 50 and the second refrigerant charging amount for the compressor 10 and the second pipeline 60 can be determined based on the cooling capacity range of the air conditioner outdoor unit 100. As shown in Table 1:

TABLE 1
	First refrigerant	Second refrigerant
Cooling capacity	charging	charging
range/ton	amount/kg	amount/kg
1-1.5	0.6-1.2	0.3-0.9
1.5-2	0.8-1.4	0.3-0.9
2-2.5	0.8-1.4	0.4-1.0
2.5-3	0.6-1.2	0.3-0.9
3-3.5	0.8-1.4	0.4-1.0
3.5-4	0.9-1.5	0.4-1.0
4-5	0.9-1.5	0.4-1.0

When the cooling capacity range of the air conditioner outdoor unit 100 ranges from 1 ton of refrigeration to 1.5 tons of refrigeration, the first refrigerant charging amount ranges from 1.3 kg to 1.6 kg, and the second refrigerant charging amount ranges from 0.3 kg to 0.9 kg. When the cooling capacity range of the air conditioner outdoor unit 100 ranges from 1.5 tons of refrigeration to 2 tons of refrigeration, the first refrigerant charging amount ranges from 0.8 kg to 1.4 kg, and the second refrigerant charging amount ranges from 0.3 kg to 0.9 kg. When the cooling capacity range of the air conditioner outdoor unit 100 ranges from 2 tons of refrigeration to 2.5 tons of refrigeration, the first refrigerant charging amount ranges from 0.8 kg to 1.4 kg, and the second refrigerant charging amount ranges from 0.4 kg to 1.0 kg. When the cooling capacity range of the air conditioner outdoor unit 100 ranges from 2.5 tons of refrigeration to 3 tons of refrigeration, the first refrigerant charging amount ranges from 0.6 kg to 1.2 kg, and the second refrigerant charging amount ranges from 0.3 kg to 0.9 kg. When the cooling capacity range of the air conditioner outdoor unit 100 ranges from 3 tons of refrigeration to 3.5 tons of refrigeration, the first refrigerant charging amount ranges from 0.8 kg to 1.4 kg, and the second refrigerant charging amount ranges from 0.4 kg to 1.0 kg. When the cooling capacity range of the air conditioner outdoor unit 100 ranges from 3.5 tons of refrigeration to 4 tons of refrigeration, the first refrigerant charging amount ranges from 0.9 kg to 1.5 kg, and the second refrigerant charging amount ranges from 0.4 kg to 1.0 kg. When the cooling capacity range of the air conditioner outdoor unit 100 ranges from 4 tons of refrigeration to 5 tons of refrigeration, the first refrigerant charging amount ranges from 0.9 kg to 1.5 kg, and the second refrigerant charging amount ranges from 0.4 kg to 1.0 kg.

The processor 210 may obtain the predetermined cooling capacity range of the air conditioner outdoor unit 100. For example, a value of the predetermined cooling capacity range of the air conditioner outdoor unit 100 is stored in the memory 220, and the processor 210 may obtain the cooling capacity range corresponding to the air conditioner outdoor unit 100 by invoking the memory 220.

The processor 210 may determine the first refrigerant charging amount and the second refrigerant charging amount corresponding to the air conditioner outdoor unit 100 based on the third predetermined mapping relationship between the cooling capacity range and the refrigerant charging amount. For example, the third predetermined mapping relationship between the cooling capacity range and the refrigerant charging amount may be a table showing a variation of the refrigerant charging amount with the cooling capacity range. The processor 210 may query this table based on the cooling capacity range of the air conditioner outdoor unit 100, and may determine the first refrigerant charging amount and the second refrigerant charging amount corresponding to the air conditioner outdoor unit 100.

Referring to FIG. 5 again, the embodiments of the present disclosure further provide an electronic device 400, including the computing device 200 as described in any of the above embodiments.

In some embodiments, the electronic device 400 includes, but is not limited to, the air conditioner outdoor unit 100, an air conditioner, a mobile phone, a tablet computer, a personal computer, a server, a wearable smart device, and the like.

Referring to FIG. 9, the embodiments of the present disclosure further provide a computer-readable storage medium 300, having a computer program 221 stored thereon. The computer program 221, when executed by a processor 210, causes the processor 210 to implement steps of the refrigerant charging method as described in any of the above embodiments. For brevity, details are omitted here.

In the description of the present disclosure, description with reference to “some embodiments”, “an example”, “exemplarily”, or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. The appearances of the above phrases in various places throughout this specification are not necessarily referring to the same embodiment or example of the present disclosure. Further, the particular features, structures, materials, or characteristics described here may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine the different embodiments or examples and the features of the different embodiments or examples described in this specification without contradicting each other.

Any process or method described in a flowchart or described herein in other ways may be understood to include one or more modules, segments, or portions of codes of executable instructions for achieving specific logical functions or steps in the process. The scope of a preferred embodiment of the present disclosure includes other implementations. A function may be performed not in a sequence shown or discussed, including a substantially simultaneous manner or a reverse sequence based on the function involved, which should be understood by those skilled in the art to which the embodiments of the present disclosure belong.

Although the embodiments of the present disclosure have been shown and described above, it can be understood that the above-mentioned embodiments are exemplary and should not be construed as limiting the present disclosure. Those of ordinary skill in the art can make changes, modifications, substitutions and modifications to the above-mentioned embodiments within the scope of the present disclosure.