Air conditioner variable frequency control method and system, electronic device and medium

Abstract

The present application relates to the air conditioning technical field, provide a kind of air conditioner variable frequency control method, system, electronic equipment and medium, the control method includes: receiving the variable frequency instruction of air conditioner, control air conditioner adjusts operating frequency interval according to variable frequency instruction;Obtain ambient temperature or the exhaust temperature of compressor;Based on variable frequency instruction, ambient temperature or exhaust temperature, adjust the shunt mode of variable shunt device.The air conditioner variable frequency control method provided by the present application can control air conditioner to adjust operating frequency interval according to variable frequency instruction when air conditioner receives variable frequency instruction, and in this process, ambient temperature or the exhaust temperature of compressor is obtained, to adjust the shunt mode of variable shunt device, to adapt to under corresponding variable frequency instruction, variable shunt device can adjust shunt mode in time, so as to better reflect the function of current air conditioner, improve user experience.

Description

Technical Field

[0001] This invention relates to the field of air conditioning technology, and in particular to a control method, system, electronic device and medium for air conditioning frequency conversion. Background Technology

[0002] With the development of technology and the improvement of people's living standards, air conditioners have become an indispensable appliance in people's lives. However, traditional air conditioners often have problems such as high energy consumption, loud noise, and large temperature fluctuations. These problems not only affect people's comfort but also increase energy waste. Therefore, how to improve the control technology of air conditioners to make them more energy-efficient, environmentally friendly, and highly efficient has always been an important research direction in the air conditioning industry.

[0003] Inverter technology in air conditioning is a technology that adjusts cooling capacity by changing the compressor's speed. By replacing the compressor in a traditional fixed-frequency air conditioner with an inverter compressor, the compressor's speed and cooling capacity can be automatically adjusted according to changes in parameters such as indoor and outdoor temperature, humidity, and air quality, thereby achieving intelligent control of the indoor environment. However, existing inverter technology is generally designed specifically for ordinary air conditioners and lacks a corresponding control scheme specifically designed for variable frequency technology, making it difficult to guarantee the functionality of the air conditioner when it is operating at inverter speed. Summary of the Invention

[0004] This invention provides a control method, system, electronic device, and medium for variable frequency air conditioning, solving the problem that existing air conditioners do not have a dedicated control scheme for variable current splitting technology, making it difficult to guarantee the functionality of the air conditioner during variable frequency operation.

[0005] This invention provides a control method for an air conditioner with variable frequency drive. The air conditioner includes a compressor, an indoor heat exchanger, a throttling device, an outdoor heat exchanger, and a variable flow distribution device. The variable flow distribution device is disposed in the outdoor heat exchanger and is used to switch between single-flow distribution mode and multi-flow distribution mode.

[0006] The air conditioner inverter control method includes the following steps:

[0007] Receive the inverter command from the air conditioner and control the air conditioner to adjust its operating frequency range according to the inverter command;

[0008] Obtain the ambient temperature or the exhaust temperature of the compressor;

[0009] Based on the frequency conversion command, the ambient temperature, or the exhaust temperature, adjust the flow distribution mode of the variable flow splitter;

[0010] The frequency conversion command is provided in multiple ways, and each frequency conversion command corresponds to frequency conversion parameters in different operating frequency ranges.

[0011] According to an embodiment of the present invention, the air conditioner inverter control method includes inverter commands divided into first-level inverter commands, second-level inverter commands, third-level inverter commands, fourth-level inverter commands, and fifth-level inverter commands; the operating frequency range corresponding to the second-level inverter command is the rated operating frequency range; the operating frequency ranges corresponding to the first-level inverter command, the second-level inverter command, the third-level inverter command, the fourth-level inverter command, and the fifth-level inverter command gradually decrease.

[0012] According to an embodiment of the present invention, in the case where the air conditioner adjusts its frequency according to the first-level inverter command, the step of adjusting the flow distribution mode of the variable flow distribution device based on the inverter command, the ambient temperature, or the exhaust temperature includes:

[0013] When the ambient temperature is greater than the maximum temperature in the preset temperature range, the variable current splitter is controlled to operate in a multi-path splitting mode.

[0014] When the ambient temperature is lower than the minimum temperature of the preset temperature range or is within the preset temperature range, the variable flow divider is controlled to operate in the current flow divider mode.

[0015] According to an embodiment of the present invention, in the case where the air conditioner adjusts its frequency according to the secondary inverter command, the step of adjusting the flow distribution mode of the variable flow distribution device based on the inverter command, the ambient temperature, or the exhaust temperature includes:

[0016] Control the variable diversion device to operate in the current diversion mode.

[0017] According to an embodiment of the present invention, an air conditioner inverter control method, when the air conditioner adjusts its frequency according to the three-level inverter command, the step of adjusting the flow distribution mode of the variable flow distribution device based on the inverter command, the ambient temperature, or the exhaust temperature includes:

[0018] When the exhaust temperature is lower than the first preset exhaust temperature, the variable flow divider is controlled to operate in single-path flow divider mode; the first preset exhaust temperature is 75% of the normal exhaust temperature;

[0019] When the exhaust temperature is greater than or equal to the first preset exhaust temperature, the variable flow divider is controlled to operate in the current flow divider mode.

[0020] The air conditioner inverter control method provided in the embodiment, in the case where the air conditioner adjusts its frequency according to the four-level inverter command, includes the step of adjusting the flow distribution mode of the variable flow distribution device based on the inverter command, the ambient temperature, or the exhaust temperature, comprising:

[0021] When the exhaust temperature is lower than the second preset exhaust temperature, the variable flow divider is controlled to operate in single-path flow divider mode; the second preset exhaust temperature is 55% of the normal exhaust temperature;

[0022] When the exhaust temperature is greater than or equal to the second preset exhaust temperature, the variable flow divider is controlled to operate in the current flow divider mode.

[0023] According to an embodiment of the present invention, in the case where the air conditioner adjusts its frequency according to the five-level inverter command, the step of adjusting the flow distribution mode of the variable flow distribution device based on the inverter command, the ambient temperature, or the exhaust temperature includes:

[0024] When the exhaust temperature is lower than the third preset exhaust temperature, the variable flow divider is controlled to operate in single-path flow divider mode; the third preset exhaust temperature is 40% of the normal exhaust temperature.

[0025] When the exhaust temperature is greater than or equal to the third preset exhaust temperature, the variable flow divider is controlled to operate in the current flow divider mode.

[0026] The present invention also provides a control system for an air conditioner inverter, comprising:

[0027] The receiving module is used to receive the inverter command of the air conditioner and control the air conditioner to adjust the frequency according to the inverter command;

[0028] An acquisition module is used to acquire the ambient temperature or the exhaust temperature of the compressor;

[0029] An adjustment module is used to adjust the flow splitting mode of the variable flow splitting device based on the frequency conversion command, the ambient temperature, or the exhaust temperature.

[0030] The frequency conversion command is provided in multiple ways, and each frequency conversion command corresponds to frequency conversion parameters in different operating frequency ranges.

[0031] This invention also provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the air conditioner frequency conversion control method.

[0032] This invention also provides a non-transitory computer-readable storage medium storing a computer program thereon, which, when executed by a processor, implements the air conditioner frequency conversion control method.

[0033] This invention also provides a computer program product, which includes a computer program stored on a non-transitory computer-readable storage medium. The computer program includes program instructions, and when the program instructions are executed by a computer, the computer can execute the air conditioner frequency conversion control method.

[0034] The air conditioner inverter control method provided by this invention can control the air conditioner to adjust its operating frequency range according to the inverter command when the air conditioner receives the inverter command. In this process, the ambient temperature or the compressor exhaust temperature is obtained to adjust the flow distribution mode of the variable flow distribution device. This allows the variable flow distribution device to adjust the flow distribution mode in a timely manner under the corresponding inverter command, thereby better reflecting the current function of the air conditioner and improving the user experience. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0036] Figure 1 This is a schematic diagram of the structure of a variable current splitter device provided in an embodiment of the present invention;

[0037] Figure 2 This is a schematic diagram of the structure of a heat exchanger provided in an embodiment of the present invention;

[0038] Figure 3 This is one of the flowcharts illustrating an air conditioner inverter control method according to an embodiment of the present invention;

[0039] Figure 4 This is a second schematic flowchart of an air conditioner inverter control method provided in an embodiment of the present invention;

[0040] Figure 5 This is a schematic diagram illustrating the principle of an air conditioner inverter control method according to an embodiment of the present invention;

[0041] Figure 6 This is a schematic diagram of the structure of an air conditioner inverter control system provided in an embodiment of the present invention;

[0042] Figure 7 This is a schematic diagram of the structure of an electronic device provided in an embodiment of the present invention;

[0043] Figure label:

[0044] 1. First branch line; 10. Check valve; 2. Second branch line; 3. Reversing valve; 31. First connection port; 32. Second connection port; 33. Third connection port; 34. Fourth connection port; 4. Heat exchange line; 610. Receiving module; 620. Acquisition module; 630. Adjustment module; 710. Processor; 720. Communication interface; 730. Memory; 740. Communication bus. Detailed Implementation

[0045] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0046] This invention provides a method for controlling the frequency conversion of an air conditioner, which can be a wall-mounted air conditioner, a floor-standing air conditioner, a window air conditioner, or a ceiling-mounted air conditioner, etc.

[0047] This air conditioner includes an indoor heat exchanger, a throttling device, an outdoor heat exchanger, and a compressor, connected sequentially. The indoor or outdoor heat exchanger is equipped with a variable flow distribution device, or both (generally, the variable flow distribution device is located in the outdoor heat exchanger). The variable flow distribution device is used to switch between single-flow and multi-flow modes.

[0048] Specifically, such as Figure 1 and Figure 2 As shown, the variable flow divider mainly consists of the following parts: a reversing valve 3, a first flow divider 1, a second flow divider 2, and at least two heat exchanger lines 4. The first flow divider 1 is connected to the second flow divider 2 through at least two heat exchanger lines 4. Both the first flow divider 1 and the second flow divider 2 have main pipes and multiple branch pipes inside. Depending on actual needs, some branch pipes are equipped with check valves 10.

[0049] The reversing valve 3 is a two-position four-way reversing valve, including a first connecting port 31, a second connecting port 32, a third connecting port 33, and a fourth connecting port 34. The reversing valve 3 has two working positions, namely the first position and the second position. The first connecting port 31 is connected to the refrigerant inlet, and the third connecting port 33 is connected to the refrigerant outlet.

[0050] The refrigerant distribution modes can be divided into single-path distribution mode and multi-path distribution mode. In multi-path distribution mode, the refrigerant in the outdoor heat exchanger of the air conditioner operates through multiple paths. In single-path distribution mode, the refrigerant in the outdoor heat exchanger of the air conditioner operates through a single path.

[0051] In multi-channel flow control mode, the reversing valve 3 is in the first position, with the first connecting port 31 connected to the second connecting port 32, and the third connecting port 33 connected to the fourth connecting port 34. At this time, the second connecting port 32 is connected to the first branch pipe 1, and the fourth connecting port 34 is connected to the second branch pipe 2. The refrigerant enters from the first branch pipe 1, is distributed through branch pipes to each heat exchange pipe 4 to exchange heat with the indoor air, then enters the main pipe through the branch pipes of the second branch pipe 2, and finally exits through the fourth connecting port 34 and the third connecting port 33, thus realizing heat exchange across multiple pipes.

[0052] In single-path split mode, the reversing valve 3 is in the second position, with the first connecting port 31 connected to the fourth connecting port 34, and the third connecting port 33 connected to the second connecting port 32. At this time, the second connecting port 32 is connected to the second split pipe 2, and the fourth connecting port 34 is connected to the first split pipe 1. The refrigerant enters from the second split pipe 2, but due to the one-way valve 10 installed in the first split pipe 1, the refrigerant can only exchange heat in a portion of the heat exchange pipes 4, which reduces the number of heat exchange pipes.

[0053] In this embodiment, two heat exchange pipelines 4 are taken as examples, namely the first heat exchange pipeline and the second heat exchange pipeline. Both the first branch pipeline 1 and the second branch pipeline 2 have one main pipeline and two branch pipelines. A one-way valve 10 is installed on one of the branch pipelines of the first branch pipeline 1. It is assumed that the one-way valve 10 is installed only in one branch pipeline of the first branch pipeline 1.

[0054] In multi-channel split mode, the reversing valve 3 is in the first position, with the first connecting port 31 connected to the second connecting port 32, and the third connecting port 33 connected to the fourth connecting port 34. At this time, the second connecting port 32 is connected to the first split pipe 1, and the fourth connecting port 34 is connected to the second split pipe 2. The refrigerant enters from the first split pipe 1, exchanges heat with the indoor air in the first heat exchange pipe and the second heat exchange pipe respectively, then enters the main pipe through the branch pipe of the second split pipe 2, and finally exits through the fourth connecting port 34 and the third connecting port 33, realizing simultaneous heat exchange in both pipes.

[0055] In single-path split mode, the reversing valve 3 is in the second position, with the first connecting port 31 connected to the fourth connecting port 34, and the third connecting port 33 connected to the second connecting port 32. At this time, the second connecting port 32 is connected to the second split pipe 2, and the fourth connecting port 34 is connected to the first split pipe 1. The refrigerant enters from the second split pipe 2, but due to the one-way valve 10 installed in the first split pipe 1, the refrigerant can only exchange heat in the first heat exchange pipe 4. At this time, heat exchange only occurs through one heat exchange pipe 4.

[0056] In addition, it should be noted that in the multi-path splitting mode, the number of splits can be adjusted according to requirements.

[0057] For example, the multi-flow splitting mode includes a first multi-flow splitting mode and a second multi-flow splitting mode. The first multi-flow splitting mode can achieve simultaneous heat exchange in two pipelines, while the second multi-flow splitting mode can achieve simultaneous heat exchange in three pipelines. In other words, the number of flow splits in the first multi-flow splitting mode is generally less than the number of flow splits in the second multi-flow splitting mode. Therefore, depending on specific needs, users can choose to switch between the single-flow splitting mode, the first multi-flow splitting mode, and the second multi-flow splitting mode to meet different heat exchange and other functional requirements.

[0058] like Figure 3 As shown, the control method for air conditioner inverters includes the following steps:

[0059] Step S110: Receive the inverter command from the air conditioner and control the air conditioner to adjust the operating frequency range according to the inverter command.

[0060] In order to achieve more efficient, energy-saving, and comfortable use, the operating status of an air conditioning system needs to be adjusted in real time during operation. Therefore, variable frequency drives (VFDs) are introduced to control the operation of the air conditioner. A VFD is a command that can change the operating frequency range of the air conditioner. By adjusting the air conditioner to operate within the corresponding frequency range, it can operate at its optimal state in different environments.

[0061] Step S110 primarily processes the inverter commands from the air conditioner. In this step, the air conditioning system receives inverter commands from the user or other devices. There are multiple such commands, each corresponding to a different operating frequency range. In other words, different inverter commands represent different air conditioner operating states.

[0062] When an air conditioning system receives a frequency converter command, it needs to adjust its operating frequency range according to the command. This process involves a series of frequency converter parameters that determine the air conditioner's operating status at different frequencies. For example, when operating in a low-frequency range, the air conditioner runs slower but consumes less energy; while in a high-frequency range, it runs faster but consumes more energy. Therefore, selecting appropriate frequency converter parameters based on actual needs allows the air conditioner to meet usage requirements while achieving energy savings.

[0063] In step S110, the air conditioning system searches for the corresponding inverter parameters based on the received inverter command. Then, the system adjusts the air conditioner's operating frequency range according to these parameters, ensuring the air conditioner operates within a specific frequency range. This process requires the air conditioning system to possess a certain degree of intelligent recognition and adaptive capability to achieve optimal operating performance.

[0064] Step S120: Obtain the ambient temperature or the compressor's exhaust temperature.

[0065] During inverter operation of an air conditioner, the distribution mode needs to be adjusted accordingly to suit the desired effect. The control system uses sensors to obtain ambient temperature or compressor exhaust temperature.

[0066] Ambient temperature refers to the air temperature where the air conditioner is located, and it directly affects the air conditioner's operating performance. Obtaining ambient temperature information helps to understand the environmental conditions in which the air conditioner is located, providing support for adjusting the air conditioner's operation.

[0067] The compressor's discharge temperature refers to the temperature of the gas produced by the compressor during the compression process. The discharge temperature directly affects the compressor's operating efficiency, energy consumption, and equipment lifespan. High discharge temperatures can lead to overheating, reduced efficiency, and even damage to the equipment. Low discharge temperatures, on the other hand, will affect the compressor's cooling performance. Therefore, obtaining the compressor's discharge temperature allows us to determine the current operating status of the compressor in the air conditioner, enabling adjustments to other parameters accordingly.

[0068] Step S130: Adjust the flow splitting mode of the variable flow splitter based on the frequency conversion command, ambient temperature, or exhaust temperature.

[0069] After the air conditioner adjusts its operating frequency range according to the inverter command, it obtains the ambient temperature or exhaust temperature based on the operating frequency range it is in, and adaptively adjusts the flow distribution mode of the variable flow distribution device. This allows the variable flow distribution device to adjust the flow distribution mode in a timely manner under the corresponding inverter command, thereby better reflecting the current function of the air conditioner and improving the user experience.

[0070] The air conditioner inverter control method provided in this embodiment of the invention can control the air conditioner to adjust its operating frequency range according to the inverter command when the air conditioner receives the inverter command. In this process, the ambient temperature or the compressor exhaust temperature is obtained to adjust the flow distribution mode of the variable flow distribution device. This allows the variable flow distribution device to adjust the flow distribution mode in a timely manner under the corresponding inverter command, thereby better reflecting the current function of the air conditioner and improving the user experience.

[0071] In one embodiment, frequency conversion instructions are divided into first-level frequency conversion instructions, second-level frequency conversion instructions, third-level frequency conversion instructions, fourth-level frequency conversion instructions, and fifth-level frequency conversion instructions.

[0072] Specifically, the operating frequency range corresponding to the Level 2 inverter command is the rated operating frequency range, for example, 95% to 105% of the rated frequency. The operating frequency ranges corresponding to the Level 1, Level 2, Level 3, Level 4, and Level 5 inverter commands gradually decrease.

[0073] Level 1 frequency conversion instruction: The corresponding operating frequency range is [X1, Y1], where X1 > the upper limit of the rated operating frequency range. For example, the operating frequency range of the Level 1 frequency conversion instruction is 105% to 110% of the rated frequency.

[0074] Level 3 frequency conversion instruction: The corresponding operating frequency range is [X2, Y2], where Y2 < the lower limit of the rated operating frequency range. For example, the operating frequency range of the level 3 frequency conversion instruction is 70% to 80% of the rated frequency.

[0075] Level 4 frequency conversion instruction: The corresponding operating frequency range is [X3, Y3], where Y3 < X2. For example, the operating frequency range of the level 4 frequency conversion instruction is 50% to 60% of the rated frequency.

[0076] Level 5 frequency conversion instruction: The corresponding operating frequency range is [X4, Y4], where Y4 < X3. For example, the operating frequency range of the level 5 frequency conversion instruction is 35% to 45% of the rated frequency.

[0077] The air conditioning inverter control system of the present invention can automatically select an appropriate inverter command based on the difference between the indoor temperature and the set temperature. When the difference between the indoor temperature and the set temperature is large, the control system will select a first-level inverter command or a second-level inverter command to quickly reduce the indoor temperature at a higher operating frequency; while when the indoor temperature is close to the set temperature, the control system will select a fourth-level or fifth-level inverter command to maintain the indoor temperature at a lower operating frequency, thereby reducing energy consumption.

[0078] Based on the above embodiments, in one embodiment, such as Figure 4 and Figure 5 As shown, when the air conditioner adjusts the frequency according to the first-level inverter command, step S130: the step of adjusting the flow distribution mode of the variable flow distribution device based on the inverter command, ambient temperature, or exhaust temperature, includes:

[0079] Step S1310: When the air conditioner adjusts the frequency according to the first-level inverter command, and the ambient temperature is greater than the maximum temperature of the preset temperature range, the variable flow divider is controlled to operate in multi-flow mode.

[0080] When the air conditioner operates according to the Level 1 inverter command, excessively high ambient temperatures can cause excessive pressure throughout the refrigerant circulation process. Therefore, a preset temperature range is set, for example, 0 to 48 degrees Celsius. When the ambient temperature exceeds 48 degrees Celsius, the variable flow control device operates in multi-path flow mode, thereby reducing the pressure and effectively ensuring the air conditioner's functionality in high-temperature environments.

[0081] Understandably, when an air conditioner has more flow distribution modes, such as a multi-flow distribution mode including a first multi-flow distribution mode and a second multi-flow distribution mode, if the air conditioner operates according to the first-level inverter command and detects that the ambient temperature is too high, it is only necessary to control the variable flow distribution device to increase the number of flow distributions in the current operating state.

[0082] Step S1320: When the air conditioner adjusts the frequency according to the first-level inverter command, and the ambient temperature is lower than the minimum temperature of the preset temperature range or within the preset temperature range, the variable flow distribution device is controlled to operate in the current flow distribution mode.

[0083] When the air conditioner operates according to the first-level inverter command, even if the ambient temperature is too low, the compressor can generally maintain the pressure inside the air conditioner because it operates at a higher frequency. Therefore, in low-temperature environments, the variable flow distribution device can be controlled to continue operating in the current flow distribution mode.

[0084] When the air conditioner is within the preset temperature range, the operating pressure of the air conditioner is within a controllable range, and there is no need to further control the variable flow device; it can simply operate in the current flow mode.

[0085] Based on the above embodiments, in one embodiment, such as Figure 4 and Figure 5 As shown, when the air conditioner adjusts the frequency according to the secondary inverter command, step S130: the step of adjusting the flow distribution mode of the variable flow distribution device based on the inverter command, ambient temperature, or exhaust temperature, includes:

[0086] Step S1330: When the air conditioner adjusts the frequency according to the secondary inverter command, control the variable flow distribution device to operate in the current flow distribution mode.

[0087] When the air conditioner operates according to the secondary inverter command, the entire air conditioner operates within the rated range, and the ambient temperature has little impact on the air conditioner. Therefore, there is no need to further control the variable flow distribution device, and it can operate in the current flow distribution mode.

[0088] Based on the above embodiments, in one embodiment, such as Figure 4 and Figure 5 As shown, when the air conditioner adjusts the frequency according to the three-level inverter command, step S130: the step of adjusting the flow distribution mode of the variable flow distribution device based on the inverter command, ambient temperature, or exhaust temperature, includes:

[0089] Step S1340: When the air conditioner adjusts the frequency according to the three-level variable frequency command, and the exhaust temperature is lower than the first preset exhaust temperature, the variable flow divider is controlled to operate in single-path flow divider mode.

[0090] When the air conditioner is operating according to the three-level inverter command, the compressor is not running at full load, so the exhaust temperature of the compressor is generally low. If the exhaust temperature is lower than the first preset exhaust temperature, it means that the current exhaust temperature is already low. In order to ensure the effect of the air conditioner, the exhaust temperature needs to be increased. At this time, the variable flow divider is controlled to operate in single-path flow divider mode to increase the exhaust temperature.

[0091] It should be noted that the first preset exhaust temperature is generally 75% of the normal exhaust temperature. That is, when the measured exhaust temperature is lower than 75% of the normal exhaust temperature, the variable flow divider is controlled to operate in single-path flow divider mode.

[0092] Understandably, when an air conditioner has more flow distribution modes, such as a multi-flow distribution mode including a first multi-flow distribution mode and a second multi-flow distribution mode, if the air conditioner operates according to the three-level inverter command and detects a low exhaust temperature, it is only necessary to control the variable flow distribution device to reduce the number of flow distributions in the current operating state.

[0093] Step S1350: When the air conditioner adjusts the frequency according to the three-level variable frequency command, and the exhaust temperature is greater than or equal to the first preset exhaust temperature, the variable flow divider is controlled to operate in the current flow divider mode.

[0094] When the air conditioner is operating according to the three-level inverter command, if the exhaust temperature is greater than or equal to the first preset exhaust temperature, it means that the exhaust temperature is normal. Therefore, there is no need to further control the variable flow distribution device, and it can operate in the current flow distribution mode.

[0095] Based on the above embodiments, in one embodiment, such as Figure 4 and Figure 5 As shown, when the air conditioner adjusts the frequency according to the fourth-level inverter command, step S130: the step of adjusting the flow distribution mode of the variable flow distribution device based on the inverter command, ambient temperature, or exhaust temperature, includes:

[0096] Step S1360: When the air conditioner adjusts the frequency according to the fourth-level variable frequency command, and the exhaust temperature is lower than the second preset exhaust temperature, the variable flow divider is controlled to operate in single-path flow divider mode.

[0097] When the air conditioner is operating according to the fourth-level inverter command, the compressor is not running at full load, so the exhaust temperature of the compressor is generally low. If the exhaust temperature is lower than the second preset exhaust temperature, it means that the current exhaust temperature is already low. In order to ensure the effect of the air conditioner, the exhaust temperature needs to be increased. At this time, the variable flow divider is controlled to operate in single-path flow divider mode to increase the exhaust temperature.

[0098] It should be noted that the second preset exhaust temperature is generally 55% of the normal exhaust temperature. That is, when the measured exhaust temperature is lower than 55% of the normal exhaust temperature, the variable flow divider is controlled to operate in single-path flow divider mode.

[0099] Understandably, when an air conditioner has more flow distribution modes, such as a multi-flow distribution mode including a first multi-flow distribution mode and a second multi-flow distribution mode, if the air conditioner operates according to the fourth-level inverter command and detects a low exhaust temperature, it is only necessary to control the variable flow distribution device to reduce the number of flow distributions in the current operating state.

[0100] Step S1370: When the air conditioner adjusts the frequency according to the fourth-level variable frequency command, and the exhaust temperature is greater than or equal to the second preset exhaust temperature, the variable flow divider is controlled to operate in the current flow divider mode.

[0101] When the air conditioner is operating according to the fourth-level inverter command, if the exhaust temperature is greater than or equal to the second preset exhaust temperature, it means that the exhaust temperature is normal. Therefore, there is no need to further control the variable flow distribution device, and it can be operated in the current flow distribution mode.

[0102] Based on the above embodiments, in one embodiment, such as Figure 4 and Figure 5 As shown, when the air conditioner adjusts the frequency according to the five-level inverter command, step S130: the step of adjusting the flow distribution mode of the variable flow distribution device based on the inverter command, ambient temperature, or exhaust temperature, includes:

[0103] Step S1380: When the air conditioner adjusts the frequency according to the five-level variable frequency command, and the exhaust temperature is less than the third preset exhaust temperature, the variable flow divider is controlled to operate in single-path flow divider mode.

[0104] When the air conditioner is operating according to the five-level inverter command, the compressor is not running at full load, so the exhaust temperature of the compressor is generally low. If the exhaust temperature is lower than the third preset exhaust temperature, it means that the current exhaust temperature is already low. In order to ensure the effect of the air conditioner, the exhaust temperature needs to be increased. At this time, the variable flow divider is controlled to operate in single-path flow divider mode to increase the exhaust temperature.

[0105] It should be noted that the third preset exhaust temperature is generally 40% of the normal exhaust temperature. That is, when the measured exhaust temperature is lower than 40% of the normal exhaust temperature, the variable flow divider is controlled to operate in single-path flow divider mode.

[0106] Understandably, when an air conditioner has more flow distribution modes, such as a multi-flow distribution mode including a first multi-flow distribution mode and a second multi-flow distribution mode, if the air conditioner operates according to the five-level inverter command and detects a low exhaust temperature, it is only necessary to control the variable flow distribution device to reduce the number of flow distributions in the current operating state.

[0107] Step S1390: When the air conditioner adjusts the frequency according to the five-level variable frequency command, and the exhaust temperature is greater than or equal to the third preset exhaust temperature, the variable flow divider is controlled to operate in the current flow divider mode.

[0108] When the air conditioner is operating according to the five-level variable frequency instruction, if the exhaust temperature is greater than or equal to the third preset exhaust temperature, it means that the exhaust temperature is normal. Therefore, there is no need to further control the variable flow distribution device, and it can be operated in the current flow distribution mode.

[0109] The air conditioner inverter control system provided in the embodiments of the present invention will be described below. The air conditioner inverter control system described below can be referred to in correspondence with the control method described above.

[0110] like Figure 6 As shown, the control system of the air conditioner inverter includes: a receiving module 610, an acquisition module 620, and an adjustment module 630.

[0111] The receiving module 610 is used to receive the inverter command from the air conditioner and control the air conditioner to adjust the frequency according to the inverter command. The acquiring module 620 is used to acquire the ambient temperature or the exhaust temperature of the compressor; the adjusting module 630 is used to adjust the flow distribution mode of the variable flow distribution device based on the inverter command, the ambient temperature or the exhaust temperature; wherein, there are multiple inverter commands, and each inverter command corresponds to inverter parameters in different operating frequency ranges.

[0112] Figure 7 An example is a schematic diagram of the physical structure of an electronic device, such as... Figure 7 As shown, the electronic device may include a processor 710, a communication interface 720, a memory 730, and a communication bus 740, wherein the processor 710, the communication interface 720, and the memory 730 communicate with each other via the communication bus 740. The processor 710 can call logic instructions in the memory 730 to execute the control method, which includes: receiving a frequency conversion instruction from the air conditioner; controlling the air conditioner to adjust its operating frequency range according to the frequency conversion instruction; acquiring the ambient temperature or the exhaust temperature of the compressor; and adjusting the flow distribution mode of the variable flow distribution device based on the frequency conversion instruction, the ambient temperature, or the exhaust temperature; wherein there are multiple frequency conversion instructions, each corresponding to frequency conversion parameters for a different operating frequency range.

[0113] It should be noted that the electronic device in this embodiment can be a server, a PC, or other devices, as long as its structure includes the following: Figure 7The processor 710, communication interface 720, memory 730, and communication bus 740 shown are interconnected via the communication bus 740. The processor 710 can call logical instructions stored in the memory 730 to execute the aforementioned method. This embodiment does not limit the specific implementation of the electronic device.

[0114] Furthermore, the logical instructions in the aforementioned memory 730 can be implemented as software functional units and, when sold or used as independent products, can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, essentially, or the part that contributes to the prior art, or a part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0115] Furthermore, this embodiment of the invention discloses a computer program product, which includes a computer program stored on a non-transitory computer-readable storage medium. The computer program includes program instructions, and when the program instructions are executed by a computer, the computer can execute the control method provided in the above-described method embodiments. The control method includes: receiving a frequency conversion instruction from the air conditioner and controlling the air conditioner to adjust its operating frequency range according to the frequency conversion instruction; acquiring the ambient temperature or the exhaust temperature of the compressor; and adjusting the flow distribution mode of the variable flow distribution device based on the frequency conversion instruction, the ambient temperature, or the exhaust temperature. The frequency conversion instruction is provided in multiple ways, and each frequency conversion instruction corresponds to frequency conversion parameters for different operating frequency ranges.

[0116] On the other hand, embodiments of the present invention also provide a non-transitory computer-readable storage medium storing a computer program thereon. When the computer program is executed by a processor, it implements the control methods provided in the above embodiments. The control method includes: receiving a frequency conversion command from the air conditioner and controlling the air conditioner to adjust its operating frequency range according to the frequency conversion command; acquiring the ambient temperature or the exhaust temperature of the compressor; and adjusting the flow distribution mode of the variable flow distribution device based on the frequency conversion command, the ambient temperature, or the exhaust temperature. The frequency conversion command is provided in multiple manner, and each frequency conversion command corresponds to frequency conversion parameters for different operating frequency ranges.

[0117] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without any creative effort.

[0118] Through the above description of the embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus necessary general-purpose hardware platforms, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solutions, in essence or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods described in the various embodiments or some parts of the embodiments.

[0119] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A control method for an air conditioner inverter, characterized in that, The air conditioner includes a compressor, an indoor heat exchanger, a throttling device, an outdoor heat exchanger, and a variable flow distribution device. The variable flow distribution device is installed in the outdoor heat exchanger and is used to switch between single-flow distribution mode and multi-flow distribution mode. The variable flow distribution device includes a reversing valve, a first flow distribution pipe, a second flow distribution pipe, and at least two heat exchange pipes. The first flow distribution pipe is connected to the second flow distribution pipe through at least two heat exchange pipes. Both the first flow distribution pipe and the second flow distribution pipe have a main pipe and multiple branch pipes inside, and some branch pipes are equipped with one-way valves. The air conditioner inverter control method includes the following steps: The system receives inverter commands from the air conditioner and controls the air conditioner to adjust its operating frequency range according to the inverter commands. Multiple inverter commands are provided, each corresponding to inverter parameters for a different operating frequency range. The inverter commands include first-level, second-level, and third-level inverter commands. The operating frequency ranges corresponding to the first-level, second-level, and third-level inverter commands gradually decrease. The operating frequency range corresponding to the second-level inverter command is the rated operating frequency range. Obtain the ambient temperature or the exhaust temperature of the compressor; Based on the frequency conversion command, the ambient temperature, or the exhaust temperature, the flow distribution mode of the variable flow distribution device is adjusted; when the air conditioner adjusts the frequency according to the first-level frequency conversion command, and the ambient temperature is greater than the maximum temperature of the preset temperature range, the variable flow distribution device is controlled to increase the flow distribution quantity in the current operating state. When the air conditioner adjusts its frequency according to the secondary inverter command, the variable flow divider is controlled to operate in the current flow divider mode; when the air conditioner adjusts its frequency according to the tertiary inverter command, and the exhaust temperature is less than the first preset exhaust temperature, the variable flow divider is controlled to reduce the flow divider quantity in the current operating state.

2. The air conditioner inverter control method according to claim 1, characterized in that, The frequency conversion instructions also include four-level frequency conversion instructions and five-level frequency conversion instructions; the operating frequency ranges corresponding to the first-level frequency conversion instructions, the second-level frequency conversion instructions, the third-level frequency conversion instructions, the fourth-level frequency conversion instructions and the fifth-level frequency conversion instructions gradually decrease.

3. The air conditioner inverter control method according to claim 2, characterized in that, When the air conditioner adjusts its frequency according to the first-level inverter command, the step of adjusting the flow distribution mode of the variable flow distribution device based on the inverter command, the ambient temperature, or the exhaust temperature includes: When the ambient temperature is greater than the maximum temperature in the preset temperature range, the variable current splitter is controlled to operate in a multi-path splitting mode. When the ambient temperature is lower than the minimum temperature of the preset temperature range or is within the preset temperature range, the variable flow divider is controlled to operate in the current flow divider mode.

4. The air conditioner inverter control method according to claim 2, characterized in that, When the air conditioner adjusts its frequency according to the three-level inverter command, the step of adjusting the flow distribution mode of the variable flow distribution device based on the inverter command, the ambient temperature, or the exhaust temperature includes: When the exhaust temperature is lower than the first preset exhaust temperature, the variable flow divider is controlled to operate in single-path flow divider mode; the first preset exhaust temperature is 75% of the normal exhaust temperature. When the exhaust temperature is greater than or equal to the first preset exhaust temperature, the variable flow divider is controlled to operate in the current flow divider mode.

5. The air conditioner inverter control method according to claim 2, characterized in that, When the air conditioner adjusts its frequency according to the fourth-level inverter command, the step of adjusting the flow distribution mode of the variable flow distribution device based on the inverter command, the ambient temperature, or the exhaust temperature includes: When the exhaust temperature is lower than the second preset exhaust temperature, the variable flow divider is controlled to operate in single-path flow divider mode; the second preset exhaust temperature is 55% of the normal exhaust temperature. When the exhaust temperature is greater than or equal to the second preset exhaust temperature, the variable flow divider is controlled to operate in the current flow divider mode.

6. The air conditioner inverter control method according to claim 2, characterized in that, When the air conditioner adjusts its frequency according to the five-level inverter command, the step of adjusting the flow distribution mode of the variable flow distribution device based on the inverter command, the ambient temperature, or the exhaust temperature includes: When the exhaust temperature is lower than the third preset exhaust temperature, the variable flow divider is controlled to operate in single-path flow divider mode; the third preset exhaust temperature is 40% of the normal exhaust temperature. When the exhaust temperature is greater than or equal to the third preset exhaust temperature, the variable flow divider is controlled to operate in the current flow divider mode.

7. A control system for an air conditioner inverter, characterized in that, An air conditioner is used in an application that includes a compressor, an indoor heat exchanger, a throttling device, an outdoor heat exchanger, and a variable flow divider. The variable flow divider is located in the outdoor heat exchanger and is used to switch between single-flow and multi-flow modes. The variable flow divider includes a reversing valve, a first flow divider, a second flow divider, and at least two heat exchanger lines. The first flow divider is connected to the second flow divider through at least two heat exchanger lines. Both the first and second flow divider lines have a main pipe and multiple branch pipes inside, and some branch pipes are equipped with check valves. The control system for the air conditioner inverter includes: A receiving module is used to receive inverter commands from the air conditioner and control the air conditioner to adjust its frequency according to the inverter commands. Multiple inverter commands are provided, each corresponding to inverter parameters in a different operating frequency range. The inverter commands include a first-level inverter command, a second-level inverter command, and a third-level inverter command. The operating frequency ranges corresponding to the first-level, second-level, and third-level inverter commands gradually decrease. The operating frequency range corresponding to the second-level inverter command is the rated operating frequency range. An acquisition module is used to acquire the ambient temperature or the exhaust temperature of the compressor; The adjustment module is used to adjust the flow distribution mode of the variable flow distribution device based on the frequency conversion command, the ambient temperature, or the exhaust temperature; when the air conditioner adjusts the frequency according to the first-level frequency conversion command, and the ambient temperature is greater than the maximum temperature of the preset temperature range, the module controls the variable flow distribution device to increase the flow distribution quantity in the current operating state; when the air conditioner adjusts the frequency according to the second-level frequency conversion command, the module controls the variable flow distribution device to operate in the current flow distribution mode; when the air conditioner adjusts the frequency according to the third-level frequency conversion command, and the exhaust temperature is less than the first preset exhaust temperature, the module controls the variable flow distribution device to decrease the flow distribution quantity in the current operating state.

8. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the program, it implements the air conditioner inverter control method as described in any one of claims 1 to 6.

9. A non-transitory 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 air conditioner frequency conversion control method as described in any one of claims 1 to 6.

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