Air conditioner outdoor unit, refrigerant filling method and device and storage medium

Abstract

The invention discloses an air conditioner outdoor unit, a refrigerant filling method and device and a storage medium. The air conditioner outdoor unit comprises a compressor, a one-way valve, a heat exchanger and a first stop valve, an output port of the compressor is connected with the heat exchanger through the one-way valve, an input port of the compressor is connected with the first stop valve, and a pipeline between the one-way valve and the heat exchanger is a first pipeline. The pipeline between the compressor and the first stop valve is a second pipeline, and refrigerants are arranged in the first pipeline, the second pipeline and the compressor. Under the condition of the same refrigerant injection amount, the air conditioner outdoor unit can store refrigerants in the first pipeline, the second pipeline and the compressor separately, so that in the process of transporting the air conditioner outdoor unit, the pressure generated when the refrigerants in the air conditioner outdoor unit are subjected to high temperature is lower than the pressure bearing capacity of the refrigerant pipeline; and pipe explosion can be reduced to a certain extent, and damage to the outdoor unit of the air conditioner is avoided.

Description

Technical Field

[0001] This invention relates to the field of air conditioner technology, and more specifically, to an outdoor air conditioner unit, a refrigerant charging method, a computing device, an electronic device, and a computer-readable storage medium. Background Technology

[0002] In related technologies, the refrigerant pipe between the one-way valve and the first shut-off valve is in a closed state, forming a blind pipe section. Refrigerant injection into the air conditioner occurs within this blind pipe section of the outdoor unit. However, during the transportation of the outdoor unit, excessive refrigerant injected into the blind pipe section, coupled with the high temperatures experienced by the outdoor unit during transport, can easily cause the pressure generated by the excess refrigerant to exceed the pressure-bearing capacity of the blind pipe section, leading to pipe rupture and damage to the outdoor unit. Summary of the Invention

[0003] The present invention provides an outdoor air conditioner unit, a refrigerant charging method, a computing device, an electronic device, and a computer-readable storage medium that can solve the problem of pipe bursting that easily occurs during the transportation of an outdoor air conditioner unit when too much refrigerant is injected into the blind pipe section and the outdoor air conditioner unit is subjected to high temperatures during transportation.

[0004] An outdoor air conditioning unit provided by an embodiment of the present invention includes a compressor, a one-way valve, a heat exchanger, and a first shut-off valve. The output port of the compressor is connected to the heat exchanger through the one-way valve, and the input port of the compressor is connected to the first shut-off valve. The pipe between the one-way valve and the heat exchanger is a first pipe, and the pipe between the compressor and the first shut-off valve is a second pipe. Refrigerant is provided in the first pipe, the second pipe, and the compressor.

[0005] Thus, with the same amount of refrigerant injected, the outdoor unit of the air conditioner can store the refrigerant separately in the first pipe, the second pipe and the compressor. Therefore, during the transportation of the outdoor unit, the pressure generated by the refrigerant in the outdoor unit when exposed to high temperatures is lower than the pressure-bearing capacity of the refrigerant pipes, which can reduce the occurrence of pipe bursts to a certain extent and avoid damage to the outdoor unit.

[0006] In some embodiments, the refrigerant level inside the compressor is lower than the compressor's air inlet.

[0007] In this way, by setting the refrigerant level in the compressor to be lower than the compressor's air inlet, liquid refrigerant entering the air inlet can be prevented from causing liquid slugging in the compressor.

[0008] The refrigerant charging method of this invention is used in an outdoor unit of an air conditioner. The outdoor unit includes a compressor, a one-way valve, a heat exchanger, and a first shut-off valve. The output port of the compressor is connected to the heat exchanger through the one-way valve, and the input port of the compressor is connected to the first shut-off valve. The refrigerant charging method includes obtaining a first refrigerant density and a first volume of a first pipe, wherein the first pipe is the pipe between the one-way valve and the heat exchanger; determining a first refrigerant injection amount for the first pipe based on the first volume and the first refrigerant density; obtaining a second refrigerant density, the internal volume of the compressor, and a second volume of a second pipe, wherein the second pipe is the pipe between the compressor and the first shut-off valve; and determining a second refrigerant injection amount for the compressor and the second pipe based on the second volume, the internal volume of the compressor, and the second refrigerant density.

[0009] In this way, by injecting the refrigerant required for the outdoor unit of the air conditioner into the first pipe and the compressor and the second pipe respectively, the amount of refrigerant injected into the first pipe can be reduced, thereby reducing the possibility of pipe bursting due to high temperature during transportation and avoiding damage to the outdoor unit.

[0010] In some embodiments, obtaining the first refrigerant density includes obtaining the highest ambient temperature of the refrigerant in the first pipe and the withstand pressure at the weakest point in the first pipe; and determining the first refrigerant density based on a first preset mapping relationship between temperature, pressure and density, the highest ambient temperature and the withstand pressure.

[0011] Thus, by substituting the highest ambient temperature of the refrigerant in the first pipe and the withstand pressure at the weakest point in the first pipe into the preset mapping relationship of temperature, pressure and density, the density of the refrigerant in the first pipe can be determined, and the density of the first refrigerant can be accurately obtained.

[0012] In some embodiments, the first preset mapping relationship includes a state equation for the change of refrigerant density with ambient temperature and withstand pressure, or a table showing the change of refrigerant density with ambient temperature and withstand pressure.

[0013] Thus, by substituting the highest ambient temperature of the refrigerant in the first pipe and the pressure resistance at the weakest point in the first pipe into a preset state equation or by querying a preset table, the efficiency of determining the density of the first refrigerant can be improved.

[0014] In some embodiments, obtaining the second refrigerant density includes obtaining the highest ambient temperature of the refrigerant in the second pipe and the withstand pressure at the weakest point in the second pipe; and determining the second refrigerant density based on a second preset mapping relationship of temperature, pressure and density, the highest ambient temperature and the withstand pressure.

[0015] Thus, by substituting the highest ambient temperature of the refrigerant in the second pipe and the withstand pressure at the weakest point in the second pipe into the preset mapping relationship of temperature, pressure and density, the density of the refrigerant in the second pipe can be determined, and the density of the second refrigerant can be accurately obtained.

[0016] In some embodiments, the second preset mapping relationship includes a state equation for the change of refrigerant density with ambient temperature and withstand pressure, or a table showing the change of refrigerant density with ambient temperature and withstand pressure.

[0017] Thus, by substituting the highest ambient temperature of the refrigerant in the second pipe and the withstand pressure at the weakest point in the second pipe into a preset state equation or by querying a preset table, the efficiency of determining the density of the second refrigerant can be improved.

[0018] The refrigerant charging method of this invention is used in an outdoor unit of an air conditioner. The outdoor unit includes a compressor, a one-way valve, a heat exchanger, and a first shut-off valve. The output port of the compressor is connected to the heat exchanger through the one-way valve, and the input port of the compressor is connected to the first shut-off valve. The pipe between the one-way valve and the heat exchanger is a first pipe, and the pipe between the compressor and the first shut-off valve is a second pipe. The refrigerant charging method includes obtaining a preset cooling capacity range of the outdoor unit; determining a first refrigerant injection amount for the first pipe based on a third preset mapping relationship between the cooling capacity range and the refrigerant injection amount and the preset cooling capacity range; and determining a second refrigerant injection amount for the compressor and the second pipe.

[0019] Thus, by determining the first refrigerant injection amount and the second refrigerant injection amount of the compressor and the second pipe based on the preset mapping relationship between the cooling capacity range and the refrigerant injection amount of the outdoor unit of the air conditioner, the efficiency of determining the first and second refrigerant injection amounts can be improved.

[0020] The computing device of the present invention includes a processor and a memory; the memory stores a computer program, which, when executed by the processor, implements the steps of the refrigerant charging method described in any of the above embodiments.

[0021] The electronic device according to the embodiments of the present invention includes the computing device described in the above embodiments.

[0022] The computer-readable storage medium of the present invention stores a computer program thereon, which, when executed by a processor, implements the steps of the refrigerant charging method described in any of the above embodiments.

[0023] Additional aspects and advantages of embodiments of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of embodiments of the invention. Attached Figure Description

[0024] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0025] Figure 1 This is a schematic diagram of the structure of an outdoor air conditioner unit according to certain embodiments of the present invention;

[0026] Figure 2 This is another structural schematic diagram of an air conditioner outdoor unit according to certain embodiments of the present invention;

[0027] Figure 3 This is yet another structural schematic diagram of an outdoor unit of an air conditioner according to certain embodiments of the present invention;

[0028] Figure 4 This is a schematic flowchart of a refrigerant charging method according to certain embodiments of the present invention;

[0029] Figure 5 This is a schematic diagram of the structure of an electronic device according to certain embodiments of the present invention;

[0030] Figures 6 to 8 This is a schematic flowchart of a refrigerant charging method according to certain embodiments of the present invention;

[0031] Figure 9 This is a schematic diagram illustrating the connection state of a computer-readable storage medium and a processor according to certain embodiments of the present invention.

[0032] Explanation of icon numbers:

[0033] 100. Outdoor unit of air conditioner; 10. Compressor; 11. Output port; 12. Input port; 13. Air inlet; 14. Gas-liquid separator; 15. Compressor body; 20. Check valve; 30. Heat exchanger; 40. First shut-off valve; 50. First pipeline; 60. Second pipeline; 70. Second shut-off valve; 200. Computing device; 210. Processor; 220. Memory; 221. Computer program; 300. Computer-readable storage medium; 400. Electronic device. Detailed Implementation

[0034] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the embodiments of the present invention, and should not be construed as limiting the embodiments of the present invention.

[0035] Please see Figure 1 , Figure 2 and Figure 3 An outdoor unit 100 for an air conditioner provided in this embodiment of the invention includes a compressor 10, a one-way valve 20, a heat exchanger 30, and a first shut-off 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 shut-off valve 40. The pipe between the one-way valve 20 and the heat exchanger 30 is a first pipe 50, and the pipe between the compressor 10 and the first shut-off valve 40 is a second pipe 60. Refrigerant is provided in the first pipe 50, the second pipe 60, and the compressor 10.

[0036] Thus, under the same refrigerant injection volume, the above-mentioned outdoor air conditioner 100 can store the refrigerant separately in the first pipe 50, the second pipe 60 and the compressor 10. Therefore, during the transportation of the outdoor air conditioner 100, the pressure generated by the refrigerant in the outdoor air conditioner 100 when exposed to high temperature is lower than the pressure bearing capacity of the refrigerant pipes, which can reduce the occurrence of pipe bursts to a certain extent and avoid damage to the outdoor air conditioner 100.

[0037] The outdoor unit 100 and the indoor unit together form an air conditioner, which is a device used to directly supply treated air to an enclosed room, space, or area. Air conditioners can provide cooling, heating, dehumidification, and air purification functions to the indoor environment. Air conditioners complete the cooling and heating processes through changes in the phase state, temperature, and pressure of the refrigerant within the outdoor unit 100.

[0038] When the outdoor unit 100 of the air conditioner is assembled, refrigerant needs to be injected into it. Currently, the refrigerant is injected into the blind pipe section formed by the one-way valve 20 and the first shut-off valve 40. However, during transportation, because the first pipe 50 between the one-way valve 20 and the first shut-off valve 40 is in a closed state, and the outdoor unit 100 is easily affected by high temperatures during transportation, the temperature of the refrigerant rises, and the molecular motion speed of the refrigerant increases. This causes the increased pressure in the first pipe 50 to exceed its pressure-bearing capacity, resulting in a pipe burst and damage to the outdoor unit 100. Therefore, it is necessary to reduce the amount of refrigerant injected into the blind pipe section to prevent the pressure in the refrigerant pipe from exceeding its pressure-bearing capacity.

[0039] Specifically, the outdoor unit 100 of the air conditioner includes a compressor 10, a one-way valve 20, a heat exchanger 30, and a first shut-off valve 40. The compressor 10 serves as the power core of the outdoor unit 100, primarily responsible for circulating and compressing the refrigerant to complete the air conditioning cycle of cooling or heating. The compressor 10 compresses the low-temperature, low-pressure gaseous refrigerant into a high-temperature, high-pressure gaseous refrigerant, increasing its temperature and pressure to create conditions for condensation at a higher temperature. Then, the high-temperature, high-pressure gaseous refrigerant is delivered to other components of the outdoor unit 100 to complete the cooling or heating cycle.

[0040] The one-way valve 20, also known as a check valve, has the ability to conduct in one direction and stop in the reverse direction. In the outdoor unit 100 of the air conditioner, the compressor 10 is connected to the heat exchanger 30 through the one-way valve 20. Thus, the one-way valve 20 can control the forward and reverse flow of the refrigerant, ensuring that the refrigerant can only flow in a specific direction, from the compressor 10 to the heat exchanger 30. For example, when the compressor 10 is stopped, the one-way valve 20 can prevent a large amount of high-temperature, high-pressure gaseous refrigerant inside the refrigerant pipe from flowing back into the compressor 10.

[0041] The heat exchanger 30 achieves energy conversion and transfer through a highly efficient heat exchange process, enabling the refrigerant to absorb and release heat to the maximum extent during condensation and evaporation. The outdoor unit 100 also includes a second shut-off valve 70, one end of which can be connected to the heat exchanger 30, and the other end of which can be connected to the indoor unit. The second shut-off valve 70 is used to control the flow of the refrigerant pipe between the heat exchanger 30 and the indoor unit. The heat exchanger 30 includes a condenser and an evaporator.

[0042] The condenser cools the high-temperature, high-pressure gaseous refrigerant delivered by the compressor 10, causing it to condense into a liquid, high-pressure refrigerant. Depending on the operating mode of the outdoor unit 100, the condenser distributes the heat generated during condensation to different locations. For example, when the outdoor unit 100 is in cooling mode, the condenser dissipates the heat generated by the condensed high-pressure, high-temperature gaseous refrigerant into the outdoor environment to complete the cooling cycle; when the outdoor unit 100 is in heating mode, the condenser dissipates the heat generated by the condensed high-pressure, high-temperature gaseous refrigerant into the indoor room to complete the heating cycle.

[0043] The evaporator evaporates the liquid refrigerant and distributes the heat generated by evaporation to different locations depending on the operating mode of the outdoor unit 100. For example, when the outdoor unit 100 is in cooling mode, the low-temperature, low-pressure liquid refrigerant enters the evaporator and exchanges heat with the indoor air. The refrigerant absorbs heat from the indoor air and evaporates into a low-temperature, low-pressure gaseous refrigerant. At the same time, the indoor air is cooled and blown into the room by a fan, achieving a cooling effect. When the outdoor unit 100 is in heating mode, the low-temperature, low-pressure liquid refrigerant enters the evaporator, absorbs heat from the external heat source, evaporates, and becomes a high-temperature, low-pressure gaseous refrigerant. Simultaneously, the high-temperature gaseous refrigerant releases heat to the indoor air, raising the indoor air temperature.

[0044] The first shut-off valve 40 has an on / off function, allowing for precise control of the refrigerant flow rate. During cooling or heating, the first shut-off valve 40 can adjust the refrigerant flow rate as needed to achieve the desired temperature regulation effect.

[0045] Specifically, the output port 11 of the compressor 10 can be connected to the heat exchanger 30 via a one-way valve 20, and a first pipe 50 is provided between the one-way valve 20 and the heat exchanger 30, so that the compressor 10 can allow the compressed high-temperature and high-pressure gaseous refrigerant to flow through the one-way valve 20 and the first pipe 50 into the heat exchanger 30. The input port 12 of the compressor 10 can be connected to the first shut-off valve 40, and a second pipe 60 is provided between the compressor 10 and the first shut-off valve 40, so that the refrigerant flowing through the first shut-off valve 40 and the second pipe 60 can enter the compressor 10.

[0046] When the outdoor unit 100 of the air conditioner is assembled and refrigerant is injected, the refrigerant can be injected into the first pipe 50, the second pipe 60 and the compressor 10.

[0047] Please see Figure 2 and Figure 3 In some embodiments, the refrigerant level inside the compressor 10 is lower than the air inlet 13 of the compressor 10.

[0048] Thus, by setting the refrigerant level in the compressor 10 to be lower than the air inlet 13 of the compressor 10, liquid refrigerant entering the air inlet 13 can be prevented from causing liquid slugging in the compressor 10.

[0049] Specifically, the compressor 10 includes an inlet 13. The inlet 13 allows refrigerant from the second pipe 60 to enter the compressor 10. Figure 2As shown, after assembling the outdoor unit 100 of the air conditioner and injecting refrigerant, it is necessary to control the amount of refrigerant injected into the second pipe 60 to prevent the refrigerant in the second pipe 60 from exceeding the air inlet 13 of the compressor 10. This would cause refrigerant to enter the compressor 10, resulting in liquid slugging and damage to the compressor 10. It should be noted that at this time, the inlet 12 of the compressor 10 can also serve as the air inlet 13 of the compressor 10.

[0050] In some embodiments, the compressor 10 includes a gas-liquid separator 14 and a compressor body 15. The gas-liquid separator 14 is used to separate the gaseous and liquid refrigerant contained in the refrigerant entering the compressor body 15 through the second conduit 60. Figure 3 As shown, the air inlet 13 of the compressor 10 can be located in the inner cavity of the gas-liquid separator 14, so that when refrigerant is injected into the second pipe 60, the liquid level of the refrigerant in the gas-liquid separator 14 is prevented from exceeding the air inlet 13 of the compressor 10.

[0051] Please see Figure 1 , Figure 4 and Figure 5 This invention provides a refrigerant charging method for an outdoor air conditioning unit 100. The outdoor air conditioning unit 100 includes a compressor 10, a one-way valve 20, a heat exchanger 30, and a first shut-off 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 shut-off valve 40. The refrigerant charging method includes:

[0052] Step 011: Obtain the first refrigerant density and the first volume of the first pipe 50, where the first pipe 50 is the pipe between the one-way valve 20 and the heat exchanger 30;

[0053] Step 012: Determine the first refrigerant injection amount of the first pipe 50 based on the first volume and the first refrigerant density;

[0054] Step 013: Obtain the second refrigerant density, the internal volume of the compressor 10, and the second volume of the second pipe 60, wherein the second pipe 60 is the pipe between the compressor 10 and the first shut-off valve 40;

[0055] Step 014: Determine the second refrigerant injection amount of compressor 10 and second pipe 60 based on the second volume, the internal volume of compressor 10 and the second refrigerant density.

[0056] In this way, by injecting the refrigerant required for the outdoor unit 100 of the air conditioner into the first pipe 50 and into the compressor 10 and the second pipe 60 respectively, the amount of refrigerant injected into the first pipe 50 can be reduced, thereby reducing the possibility of pipe bursting caused by high temperature during transportation of the outdoor unit 100 of the air conditioner and avoiding damage to the outdoor unit 100 of the air conditioner.

[0057] The outdoor unit 100 of the air conditioner includes a compressor 10, a one-way valve 20, a heat exchanger 30, and a first shut-off 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 can be connected to the first shut-off valve 40. The outdoor unit 100 also includes a computing device 200, which includes a processor 210 and a memory 220. The memory 220 stores a computer program 221. When the computer program 221 is executed by the processor 210, the steps of the above-described refrigerant charging method are implemented.

[0058] Specifically, the processor 210 can obtain the first refrigerant density and the first volume of the first pipe 50. The first pipe 50 can be a pipe between the one-way valve 20 and the heat exchanger 30 through which the refrigerant flows. For example, the processor 210 can obtain the first refrigerant density by installing a density sensor in the first pipe 50 and reading the data displayed on the density sensor; the processor 210 can obtain the first volume by obtaining the diameter data of the pipe opening and the length data of the first pipe 50, and then calculating the first volume of the first pipe 50.

[0059] Then, having obtained the first refrigerant density and first volume of the refrigerant in the first pipe 50, the processor 210 can determine the first refrigerant injection amount of the first pipe 50 by calculation.

[0060] The processor 210 is capable of acquiring the second refrigerant density, the internal volume of the compressor 10, and the second volume of the second pipe 60. The second pipe 60 can be a pipe between the compressor 10 and the first shut-off valve 40 through which the refrigerant flows. For example, the processor 210 can acquire the second refrigerant density by installing a density sensor in the first pipe 50 and reading the data displayed on the density sensor; the processor 210 can acquire the second volume by acquiring the diameter data of the pipe opening of the second pipe 60 and the length data of the second pipe 60, and then calculating the second volume of the second pipe 60; the processor 210 can acquire the internal volume of the compressor 10 by querying the size data of the compressor 10 pre-set in the memory 220.

[0061] Then, having obtained the second volume, the internal volume of the compressor 10, and the second refrigerant density, the processor 210 can determine the second refrigerant injection amount of the compressor 10 and the second pipe 60 by calculation.

[0062] Please see Figure 6In some implementations, step 011: obtaining the first refrigerant density includes:

[0063] Step 0111: Obtain the highest ambient temperature of the refrigerant in the first pipe 50 and the withstand pressure at the weakest point in the first pipe 50;

[0064] Step 0112: Determine the first refrigerant density based on the first preset mapping relationship between temperature, pressure and density, the highest ambient temperature and the withstand pressure.

[0065] Thus, by substituting the highest ambient temperature of the refrigerant in the first pipe 50 and the pressure resistance at the weakest point in the first pipe 50 into the preset mapping relationship of temperature, pressure and density, the density of the refrigerant in the first pipe 50 can be determined, and the density of the first refrigerant can be accurately obtained.

[0066] Specifically, the processor 210 obtains the first refrigerant density in the first pipe 50 between the one-way valve 20 and the heat exchanger 30 by acquiring the highest ambient temperature of the refrigerant in the first pipe 50 and the withstand pressure at the weakest pressure-resistant part of the first pipe 50, and determines it according to a first preset mapping relationship between temperature, pressure, and density. The highest ambient temperature of the refrigerant in the first pipe 50 can be obtained by setting multiple temperature sensors in the first pipe 50, detecting the temperature of the refrigerant through multiple temperature sensors, and comparing the collected temperature data.

[0067] The pressure resistance at the weakest point in the first pipe 50 can be obtained by setting multiple pressure sensors in the first pipe 50, detecting the pressure resistance at the deformation point in the first pipe 50 using multiple pressure sensors, comparing the collected pressure data, and determining the pressure resistance at the point with the greatest deformation as the pressure resistance at the weakest point in the first pipe 50.

[0068] Given the maximum ambient temperature and withstand pressure of the refrigerant, the processor 210 can determine the density of the first refrigerant in the first pipe 50 based on a first preset mapping relationship between temperature, pressure, and density, as well as the maximum ambient temperature and withstand pressure. The first preset mapping relationship can be a state equation showing the change of refrigerant density with ambient temperature and withstand pressure; by substituting the ambient temperature and withstand pressure into the state equation, the first refrigerant density can be determined. Alternatively, the first preset mapping relationship can be a table showing the change of refrigerant density with ambient temperature and withstand pressure; by querying the values ​​of the ambient temperature and withstand pressure, the first refrigerant density can be determined.

[0069] Thus, by substituting the highest ambient temperature of the refrigerant in the first pipe 50 and the pressure resistance at the weakest point in the first pipe 50 into a preset state equation or by querying a preset table, the efficiency of determining the density of the first refrigerant can be improved.

[0070] Please see Figure 7 In some implementations, step 013: obtaining the second refrigerant density includes:

[0071] Step 0131: Obtain the highest ambient temperature of the refrigerant in the second pipe 60 and the withstand pressure at the weakest point in the second pipe 60;

[0072] Step 0132: Determine the second refrigerant density based on the second preset mapping relationship of temperature, pressure and density, the highest ambient temperature and the withstand pressure.

[0073] Thus, by substituting the highest ambient temperature of the refrigerant in the second pipe 60 and the withstand pressure at the weakest pressure-resistant part of the second pipe 60 into the preset mapping relationship of temperature, pressure and density, the density of the refrigerant in the second pipe 60 can be determined, and the density of the second refrigerant can be accurately obtained.

[0074] Specifically, the processor 210 obtains the second refrigerant density in the second pipe 60 between the compressor 10 and the first shut-off valve 40 by obtaining the highest ambient temperature of the refrigerant in the second pipe 60 and the withstand pressure at the weakest point in the second pipe 60, and determines it according to a second preset mapping relationship between temperature, pressure, and density. The highest ambient temperature of the refrigerant in the second pipe 60 can be obtained by setting multiple temperature sensors in the second pipe 60, detecting the temperature of the refrigerant by multiple temperature sensors, and comparing the collected temperature data.

[0075] The pressure resistance at the weakest point in the second pipe 60 can be obtained by setting multiple pressure sensors in the second pipe 60, detecting the pressure resistance at the deformation points in the second pipe 60 using multiple pressure sensors, comparing the collected pressure data, and determining the pressure resistance at the point with the greatest deformation as the pressure resistance at the weakest point in the second pipe 60.

[0076] Given the maximum ambient temperature and withstand pressure of the refrigerant, the processor 210 can determine the density of the second refrigerant in the second pipe 60 based on a second preset mapping relationship between temperature, pressure, and density, as well as the maximum ambient temperature and withstand pressure. The second preset mapping relationship can be a state equation showing the refrigerant density changing with ambient temperature and withstand pressure; by substituting the ambient temperature and withstand pressure into the state equation, the second refrigerant density can be determined. Alternatively, the second preset mapping relationship can be a table showing the refrigerant density changing with ambient temperature and withstand pressure; by querying the values ​​of the ambient temperature and withstand pressure, the second refrigerant density can be determined.

[0077] Thus, by substituting the highest ambient temperature of the refrigerant in the second pipe 60 and the pressure resistance at the weakest point in the second pipe 60 into a preset state equation or by querying a preset table, the efficiency of determining the density of the second refrigerant can be improved.

[0078] Please see Figure 1 , Figure 5 and Figure 8 This invention provides a refrigerant charging method for an outdoor air conditioning unit 100. The outdoor air conditioning unit 100 includes a compressor 10, a one-way valve 20, a heat exchanger 30, and a first shut-off 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 shut-off valve 40. The pipe between the one-way valve 20 and the heat exchanger 30 is a first pipe 50, and the pipe between the compressor 10 and the first shut-off valve 40 is a second pipe 60. The refrigerant charging method includes:

[0079] Step 021: Obtain the preset cooling capacity range of the outdoor unit 100 of the air conditioner;

[0080] Step 022: Based on the third preset mapping relationship between cooling capacity segment and refrigerant injection amount and the preset cooling capacity segment, determine the first refrigerant injection amount of the first pipe 50, and determine the second refrigerant injection amount of the compressor 10 and the second pipe 60.

[0081] Thus, by determining the first refrigerant injection amount and the second refrigerant injection amount of the compressor 10 and the second pipe 60 according to the preset mapping relationship between the cooling capacity range and the refrigerant injection amount of the outdoor unit 100, the efficiency of determining the first refrigerant injection amount and the second refrigerant injection amount can be improved.

[0082] The outdoor unit 100 of the air conditioner includes a compressor 10, a one-way valve 20, a heat exchanger 30 and a first shut-off 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 can be connected to the first shut-off valve 40.

[0083] The outdoor unit 100 of the air conditioner also includes a computing device 200, which includes a processor 210 and a memory 220. The memory 220 stores a computer program 221. When the computer program 221 is executed by the processor 210, the steps of the above-mentioned refrigerant charging method are implemented.

[0084] Specifically, different outdoor air conditioning units 100 are equipped with different cooling capacity ranges, and different cooling capacity ranges require different amounts of refrigerant. Therefore, the first refrigerant injection amount and the second refrigerant injection amount of the compressor 10 and the second pipe 60 can be determined based on the cooling capacity range of the outdoor air conditioning unit 100. As shown in Table 1,

[0085] Table 1

[0086] Cooling capacity range / ton First refrigerant injection volume / kg Second refrigerant injection volume / 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

[0087] Specifically, when the cooling capacity of the outdoor unit 100 is between 1 and 1.5 refrigeration tons, the first refrigerant injection amount is 1.3 kg to 1.6 kg, and the second refrigerant injection amount is 0.3 kg to 0.9 kg; when the cooling capacity of the outdoor unit 100 is between 1.5 and 2 refrigeration tons, the first refrigerant injection amount is 0.8 kg to 1.4 kg, and the second refrigerant injection amount is 0.3 kg to 0.9 kg; when the cooling capacity of the outdoor unit 100 is between 2 and 2.5 refrigeration tons, the first refrigerant injection amount is 0.8 kg to 1.4 kg, and the second refrigerant injection amount is 0.4 kg to 1 kg; when the cooling capacity of the outdoor unit 100 is between 2.5 and 3 refrigeration tons... The first refrigerant injection amount is 0.6 kg to 1.2 kg, and the second refrigerant injection amount is 0.3 kg to 0.9 kg; when the cooling capacity of the outdoor unit 100 is 3 refrigeration tons to 3.5 refrigeration tons, the first refrigerant injection amount is 0.8 kg to 1.4 kg, and the second refrigerant injection amount is 0.4 kg to 1 kg; when the cooling capacity of the outdoor unit 100 is 3.5 refrigeration tons to 4 refrigeration tons, the first refrigerant injection amount is 0.9 kg to 1.5 kg, and the second refrigerant injection amount is 0.4 kg to 1 kg; when the cooling capacity of the outdoor unit 100 is 4 refrigeration tons to 5 refrigeration tons, the first refrigerant injection amount is 0.9 kg to 1.5 kg, and the second refrigerant injection amount is 0.4 kg to 1 kg.

[0088] The processor 210 can obtain the preset cooling capacity range of the outdoor unit 100. For example, the value of the preset cooling capacity range of the outdoor unit 100 is stored in the memory 220, and the processor 210 can obtain the corresponding cooling capacity range of the outdoor unit 100 by calling the memory 220.

[0089] The processor 210 can determine the first and second refrigerant injection amounts corresponding to the outdoor unit 100 of the air conditioner based on a third preset mapping relationship between cooling capacity range and volume. For example, the third preset mapping relationship between cooling capacity range and refrigerant injection amount can be a table showing how the refrigerant injection amount changes with the cooling capacity range. The processor 210 can look up the table based on the cooling capacity range of the outdoor unit 100 of the air conditioner to determine the first and second refrigerant injection amounts corresponding to the outdoor unit 100 of the air conditioner.

[0090] Please refer to it again. Figure 5 The present invention also provides an electronic device 400, which includes the computing device 200 described in any of the above embodiments.

[0091] Specifically, the electronic device 400 includes, but is not limited to, an outdoor air conditioning unit 100, an air conditioner, a mobile phone, a tablet computer, a personal computer, a server, and wearable smart devices.

[0092] Please see Figure 9 The present invention also provides a computer-readable storage medium 300 storing a computer program 221. When the computer program 221 is executed by the processor 210, it implements the steps of the refrigerant charging method described in any of the above embodiments. For the sake of brevity, it will not be described in detail here.

[0093] In the description of this specification, the references to terms such as "some embodiments," "in one example," and "exemplarily" indicate that a specific feature, structure, material, or characteristic described in connection with an embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0094] Any process or method description in the flowchart or otherwise herein can be understood as representing a module, segment, or portion of code comprising one or more executable instructions for implementing a particular logical function or process, and the scope of the preferred embodiments of the invention includes additional implementations in which functions may be performed not in the order shown or discussed, including substantially simultaneously or in reverse order depending on the functions involved, as will be understood by those skilled in the art to which embodiments of the invention pertain.

[0095] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. An outdoor unit for an air conditioner, characterized in that, The system includes a compressor, a one-way valve, a heat exchanger, and a first shut-off valve. The output port of the compressor is connected to the heat exchanger through the one-way valve, and the input port of the compressor is connected to the first shut-off valve. The pipe between the one-way valve and the heat exchanger is a first pipe, and the pipe between the compressor and the first shut-off valve is a second pipe. Refrigerant is contained in the first pipe, the second pipe, and the compressor.

2. The outdoor unit of the air conditioner according to claim 1, characterized in that, The refrigerant level inside the compressor is lower than the compressor's air inlet.

3. A refrigerant charging method for an outdoor unit of an air conditioner, characterized in that, The outdoor unit of the air conditioner includes a compressor, a one-way valve, a heat exchanger, and a first shut-off valve. The output port of the compressor is connected to the heat exchanger through the one-way valve, and the input port of the compressor is connected to the first shut-off valve. The refrigerant charging method includes: Obtain the first refrigerant density and the first volume of the first pipe, wherein the first pipe is the pipe between the one-way valve and the heat exchanger; The first refrigerant injection amount is determined based on the first volume and the first refrigerant density; Obtain the second refrigerant density, the internal volume of the compressor, and the second volume of the second pipe, wherein the second pipe is the pipe between the compressor and the first shut-off valve; The second refrigerant injection amount for the compressor and the second pipeline is determined based on the second volume, the internal volume of the compressor, and the second refrigerant density.

4. The refrigerant charging method according to claim 3, characterized in that, The process of obtaining the first refrigerant density includes: Obtain the highest ambient temperature of the refrigerant in the first pipe and the withstand pressure at the weakest point in the first pipe; The first refrigerant density is determined based on a first preset mapping relationship between temperature, pressure, and density, the highest ambient temperature, and the withstand pressure.

5. The refrigerant charging method according to claim 4, characterized in that, The first preset mapping relationship includes a state equation for the change of refrigerant density with ambient temperature and withstand pressure, or a table showing the change of refrigerant density with ambient temperature and withstand pressure.

6. The refrigerant charging method according to claim 3, characterized in that, The process of obtaining the second refrigerant density includes: Obtain the highest ambient temperature of the refrigerant in the second pipe and the withstand pressure at the weakest point in the second pipe; The second refrigerant density is determined based on a second preset mapping relationship between temperature, pressure, and density, the highest ambient temperature, and the withstand pressure.

7. The refrigerant charging method according to claim 6, characterized in that, The second preset mapping relationship includes a state equation for the change of refrigerant density with ambient temperature and withstand pressure, or a table showing the change of refrigerant density with ambient temperature and withstand pressure.

8. A refrigerant charging method for an outdoor unit of an air conditioner, characterized in that, The outdoor unit of the air conditioner includes a compressor, a one-way valve, a heat exchanger, and a first shut-off valve. The output port of the compressor is connected to the heat exchanger through the one-way valve, and the input port of the compressor is connected to the first shut-off valve. The pipe between the one-way valve and the heat exchanger is a first pipe, and the pipe between the compressor and the first shut-off valve is a second pipe. The refrigerant charging method includes: Obtain the preset cooling capacity range of the outdoor unit of the air conditioner; Based on the third preset mapping relationship between refrigeration capacity segment and refrigerant injection amount and the preset refrigeration capacity segment, the first refrigerant injection amount of the first pipe is determined, and the second refrigerant injection amount of the compressor and the second pipe is determined.

9. A computing device, characterized in that, include: Processor, and; A memory storing a computer program, which, when executed by the processor, implements the steps of the refrigerant charging method according to any one of claims 3-8.

10. An electronic device, characterized in that, Includes the computing device as described in claim 9.

11. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the steps of the refrigerant charging method according to any one of claims 3-8.

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