Air conditioner control methods and devices for preventing airflow deviation, evaporator, air conditioner

Abstract

This invention discloses an air conditioner control method and device for preventing evaporation flow deviation, an evaporator, and an air conditioner. The method includes: when the ambient temperature in the target room where the air conditioner is located reaches a predetermined temperature, acquiring the pipe temperature change rate and the ambient temperature change rate within the current time period; determining that the evaporator is in an evaporation flow deviation state when the pipe temperature change rate is greater than a first rate threshold and the ambient temperature change rate is less than a second rate threshold; controlling the electronic expansion valve to increase its opening by a predetermined degree based on its current opening; repeating the above steps at least once until the current opening of the electronic expansion valve reaches an opening threshold, or until the air conditioner undergoes a state switch. This invention solves the technical problem in related technologies where evaporator evaporation flow deviation leads to poor cooling performance in the air conditioner, resulting in high power consumption and negatively impacting user experience.

Description

Technical Field

[0001] This invention relates to the field of home appliance control technology, and more specifically, to an air conditioner control method and device for preventing airflow deviation, an evaporator, and an air conditioner. Background Technology

[0002] Air conditioners are increasingly used in various settings, typically operating in cooling mode at high temperatures. However, issues can arise in certain situations. For example, in low-temperature environments like hospitals and laboratories, where air conditioning is used to keep the space as enclosed as possible, humidity levels drop over time. This can cause uneven flow in the evaporator. Clogged or dirty air conditioning systems can also lead to uneven evaporator flow, resulting in inconsistent temperatures in some or all of the evaporator's flow path. This degrades cooling efficiency and can even cause frost or ice buildup due to excessively low temperatures. This not only significantly impacts user comfort but also increases energy consumption.

[0003] In traditional inverter air conditioners, after remote control startup, the opening of the electronic expansion valve stabilizes once the ambient temperature reaches the preset temperature. When the exhaust reaches the target exhaust level, the valve opening remains constant. When the ambient temperature is relatively low and the user still needs air conditioning, the ambient temperature is close to the preset temperature, making it easy to reach the desired temperature. Furthermore, as the air conditioner is used for a longer period, the humidity in the inner loop decreases. At lower humidity, the evaporator is more prone to flow deviation. If the pipe temperature path drops below 0°C, the anti-freeze protection is triggered, preventing the evaporator from freezing. However, if the evaporator temperature rises sharply in the pipe temperature path, the temperature in other flow paths of the evaporator drops, and this temperature decreases over time, eventually leading to freezing. However, the evaporator cannot trigger the anti-freeze protection, severely impacting the cooling effect and user experience. The extended high-frequency operation also results in energy loss.

[0004] There is currently no effective solution to the problem that the air conditioner's cooling effect deteriorates due to evaporator flow deviation, which easily leads to serious power consumption and affects user experience in the aforementioned related technologies. Summary of the Invention

[0005] This invention provides an air conditioner control method and device for preventing flow deviation, an evaporator, and an air conditioner, to at least solve the technical problem in the related art where flow deviation in the evaporator leads to poor cooling effect of the air conditioner, which easily causes serious power consumption and affects user experience.

[0006] According to one aspect of the present invention, an air conditioner control method for preventing flow deviation is provided, comprising: an acquisition step, wherein, when the ambient temperature in the target room where the air conditioner is located reaches a predetermined temperature, the pipe temperature change rate and the ambient temperature change rate within a current time period are acquired, wherein the pipe temperature is the temperature of the pipes of the evaporator in the air conditioner, and the duration of the time period is a predetermined duration; and a determination step, wherein, when the pipe temperature change rate is greater than a first rate threshold and the ambient temperature change rate is less than a second rate threshold, the evaporator is determined to be in a flow deviation state, wherein the first rate threshold is the threshold value at which the evaporator is determined to be in the flow deviation state. A threshold for judging the rate of change of the pipe temperature, wherein the second rate threshold is a threshold for judging the rate of change of the ambient temperature when judging whether the evaporator is in the biased flow state, the biased flow state refers to the state in which the refrigerant is unevenly distributed in the pipes of the evaporator; a control step, wherein if it is determined that the evaporator is in the biased flow state, the electronic expansion valve is controlled to increase the opening by a predetermined degree based on the current opening degree; the acquisition step, the determination step and the control step are repeated at least once in sequence until the current opening degree of the electronic expansion valve reaches the opening degree threshold, or until the air conditioner undergoes a state switch, wherein the state switch refers to a change in the operating parameters of the air conditioner.

[0007] Optionally, when the ambient temperature in the target room where the air conditioner is located reaches a predetermined temperature, acquiring the pipe temperature change rate and the ambient temperature change rate within the current time period includes: acquiring the operating mode of the air conditioner after it is started; acquiring the ambient temperature in the target room according to a predetermined period when the operating mode is cooling mode; controlling the air conditioner to operate at a predetermined frequency when the ambient temperature reaches the predetermined temperature, wherein the predetermined frequency is lower than a frequency threshold; and acquiring the pipe temperature change rate and the ambient temperature change rate within the current time period while the air conditioner is operating at the predetermined frequency.

[0008] Optionally, when it is determined that the evaporator is in the biased flow state, controlling the electronic expansion valve to increase the opening by a predetermined degree based on the current opening degree includes: when it is determined that the evaporator is in the biased flow state, obtaining the current opening degree of the electronic expansion valve; and when the current opening degree does not reach the opening threshold, controlling the electronic expansion valve to increase the opening by the predetermined degree based on the current opening degree.

[0009] Optionally, the air conditioner control method for preventing flow deviation further includes: when the current opening degree of the electronic expansion valve reaches the opening degree threshold, controlling the air conditioner to operate according to the current state; when the duration of the air conditioner operating according to the current state reaches a preset duration, performing the acquisition step to obtain the current pipe temperature change rate and the ambient temperature change rate; when the current pipe temperature change rate is greater than the first rate threshold and the current ambient temperature change rate is less than the second rate threshold, determining that the evaporator is still in the flow deviation state; when it is determined that the evaporator is still in the flow deviation state, detecting whether the current opening degree of the electronic expansion valve has changed, and obtaining a detection result; controlling the electronic expansion valve or the air conditioner to perform an adjustment operation according to the detection result, so that the evaporator is restored from the flow deviation state to the non-flow deviation state, wherein the non-flow deviation state refers to the state in which the refrigerant is evenly distributed in the pipes of the evaporator.

[0010] Optionally, performing an adjustment operation on the air conditioner based on the detection result to restore the evaporator from the biased flow state to the non-biased flow state includes: when the detection result indicates that the current opening degree has changed and the changed current opening degree is still less than the opening degree threshold, controlling the electronic expansion valve to increase the predetermined opening degree based on the current opening degree to restore the evaporator from the biased flow state to the non-biased flow state; and when the detection result indicates that the current opening degree has not changed, or when the detection result indicates that the current opening degree has changed and the changed current opening degree is greater than the opening degree threshold, controlling the air conditioner to perform the adjustment operation to restore the evaporator from the biased flow state to the non-biased flow state.

[0011] Optionally, controlling the air conditioner to perform the adjustment operation to restore the evaporator from the biased flow state to the non-biased flow state includes at least one of the following: controlling the air conditioner to perform a self-cleaning operation to make the refrigerant flowability higher than a flowability threshold, so as to restore the evaporator from the biased flow state to the non-biased flow state; controlling the air conditioner to perform a refrigerant adjustment operation to adaptively adjust the type and charge amount of the refrigerant, so as to restore the evaporator from the biased flow state to the non-biased flow state; controlling the air conditioner to perform an airflow guidance adjustment operation to make the cold air generated by the refrigerant during evaporation evenly distributed on the surface of the evaporator, so as to restore the evaporator from the biased flow state to the non-biased flow state.

[0012] Optionally, the air conditioner control method for preventing flow deviation further includes: when the air conditioner's operating mode is not cooling mode, controlling the air conditioner to operate according to a first current operating state, wherein the first current operating state is the operating state of the air conditioner when operating in a mode other than cooling mode; when the pipe temperature change rate is not greater than the first rate threshold, controlling the air conditioner to operate according to a second current operating state, wherein the second current operating state refers to the operating state of the air conditioner when the pipe temperature change rate is not greater than the first rate threshold; when the pipe temperature change rate is not greater than the first rate threshold and the ambient temperature change rate is less than the second rate threshold, controlling the air conditioner to operate according to a third current operating state, wherein the third current operating state refers to the operating state of the air conditioner when the ambient temperature change rate is not less than the second rate threshold.

[0013] According to another aspect of the present invention, an air conditioner control device for preventing flow deviation is also provided, comprising: a first acquisition unit, configured to perform an acquisition step, acquiring, when the ambient temperature in the target room where the air conditioner is located reaches a predetermined temperature, the pipe temperature change rate and the ambient temperature change rate within a current time period, wherein the pipe temperature is the temperature of the pipe of the evaporator in the air conditioner, and the duration of the time period is a predetermined duration; and a first determination unit, configured to perform a determination step, determining that the evaporator is in a flow deviation state when the pipe temperature change rate is greater than a first rate threshold and the ambient temperature change rate is less than a second rate threshold, wherein the first rate threshold is used to determine whether the evaporator is in the flow deviation state. The system comprises: a threshold for judging the rate of change of the pipe temperature under certain conditions; a second rate threshold for judging the rate of change of the ambient temperature when determining whether the evaporator is in the biased flow state; a biased flow state referring to the state in which the refrigerant is unevenly distributed in the pipes of the evaporator; a first control unit for executing control steps, wherein, when it is determined that the evaporator is in the biased flow state, the control unit controls the electronic expansion valve to increase the opening degree by a predetermined degree based on the current opening degree; and an execution unit for sequentially repeating the acquisition step, the determination step, and the control step at least once, until the current opening degree of the electronic expansion valve reaches the opening degree threshold, or until the air conditioner undergoes a state switch, wherein the state switch refers to a change in the operating parameters of the air conditioner.

[0014] Optionally, the first acquisition unit includes: a first acquisition module, configured to acquire the operating mode of the air conditioner after the air conditioner is started; a second acquisition module, configured to acquire the ambient temperature in the target room according to a predetermined cycle when the operating mode is cooling mode; a first control module, configured to control the air conditioner to operate at a predetermined frequency when the ambient temperature reaches the predetermined temperature, wherein the predetermined frequency is lower than a frequency threshold; and a third acquisition module, configured to acquire the pipe temperature change rate and the ambient temperature change rate within the current time cycle during the operation of the air conditioner at the predetermined frequency.

[0015] Optionally, the first control unit includes: a fourth acquisition module, configured to acquire the current opening degree of the electronic expansion valve when it is determined that the evaporator is in the biased flow state; and a second control module, configured to control the electronic expansion valve to increase the predetermined opening degree based on the current opening degree when the current opening degree does not reach the opening degree threshold.

[0016] Optionally, the air conditioner control device for preventing flow deviation further includes: a second control unit, configured to control the air conditioner to operate in the current state when the current opening degree of the electronic expansion valve reaches the opening degree threshold; a second acquisition unit, configured to execute the acquisition step to obtain the current pipe temperature change rate and the ambient temperature change rate when the duration of the air conditioner operating in the current state reaches a preset duration; a second determination unit, configured to determine that the evaporator is still in the flow deviation state when the current pipe temperature change rate is greater than the first rate threshold and the current ambient temperature change rate is less than the second rate threshold; a third acquisition unit, configured to detect whether the current opening degree of the electronic expansion valve has changed when the evaporator is determined to be still in the flow deviation state, and obtain a detection result; and an adjustment unit, configured to control the electronic expansion valve or the air conditioner to perform an adjustment operation according to the detection result, so that the evaporator is restored from the flow deviation state to a non-flow deviation state, wherein the non-flow deviation state refers to the state in which the refrigerant is evenly distributed in the pipes of the evaporator.

[0017] Optionally, the adjustment unit includes: a first adjustment module, configured to control the electronic expansion valve to increase the predetermined opening based on the current opening when the detection result indicates that the current opening has changed and the changed current opening is still less than the opening threshold, so as to restore the evaporator from the biased flow state to the non-biased flow state;

[0018] The second adjustment module is used to control the air conditioner to perform the adjustment operation when the detection result indicates that the current opening degree has not changed, or when the detection result indicates that the current opening degree has changed and the changed current opening degree is greater than the opening threshold, so as to restore the evaporator from the biased flow state to the non-biased flow state.

[0019] Optionally, the second adjustment module includes at least one of the following: a first control submodule, configured to control the air conditioner to perform a self-cleaning operation, thereby increasing the refrigerant flow rate above a flow rate threshold to restore the evaporator from the biased flow state to the non-biased flow state; a second control submodule, configured to control the air conditioner to perform a refrigerant adjustment operation, adaptively adjusting the type and charge amount of the refrigerant to restore the evaporator from the biased flow state to the non-biased flow state; and a third control submodule, configured to control the air conditioner to perform an airflow guidance adjustment operation, thereby evenly distributing the cold air generated during the refrigerant evaporation process onto the surface of the evaporator to restore the evaporator from the biased flow state to the non-biased flow state.

[0020] Optionally, the air conditioner control device for preventing flow deviation further includes: a third control unit, configured to control the air conditioner to operate according to a first current operating state when the air conditioner's operating mode is not cooling mode, wherein the first current operating state is the operating state of the air conditioner when it operates in an operating mode other than cooling mode; a fourth control unit, configured to control the air conditioner to operate according to a second current operating state when the pipe temperature change rate is not greater than the first rate threshold, wherein the second current operating state refers to the operating state of the air conditioner when the pipe temperature change rate is not greater than the first rate threshold; and a fifth control unit, configured to control the air conditioner to operate according to a third current operating state when the pipe temperature change rate is not greater than the first rate threshold and the ambient temperature change rate is less than the second rate threshold, wherein the third current operating state refers to the operating state of the air conditioner when the ambient temperature change rate is not less than the second rate threshold.

[0021] According to another aspect of the present invention, an air conditioner is also provided, which uses any of the above-described methods for preventing airflow deviation.

[0022] According to another aspect of the present invention, a computer-readable storage medium is also provided, the computer-readable storage medium including a stored program, wherein the program executes any of the above-described methods for preventing airflow deviation in an air conditioner.

[0023] According to another aspect of the present invention, a processor is also provided, the processor being configured to run a program, wherein the program, when running, executes any of the above-described methods for preventing airflow deviation in an air conditioner.

[0024] According to another aspect of the present invention, a computer program product is also provided, including computer instructions, which, when executed by a processor, perform any of the above-described methods for preventing airflow deviation in an air conditioner.

[0025] In this embodiment of the invention, the acquisition step involves acquiring the pipe temperature change rate and the ambient temperature change rate within the current time period when the ambient temperature in the target room where the air conditioner is located reaches a predetermined temperature. The pipe temperature refers to the temperature of the evaporator pipes in the air conditioner, and the time period is a predetermined duration. The determination step involves determining that the evaporator is in a flow-biased state when the pipe temperature change rate is greater than a first rate threshold and the ambient temperature change rate is less than a second rate threshold. The first rate threshold is a threshold used to determine whether the evaporator is in a flow-biased state based on the pipe temperature change rate, and the second rate threshold is a threshold used to determine whether the evaporator is in a flow-biased state based on the ambient temperature change rate. Flow-biased state refers to a state where the refrigerant distribution in the evaporator pipes is uneven. The control step involves controlling the electronic expansion valve to increase its opening by a predetermined degree based on its current opening when the evaporator is determined to be in a flow-biased state. The acquisition step, determination step, and control step are repeated at least once until the current opening of the electronic expansion valve reaches the opening threshold, or until the air conditioner undergoes a state switch, where a state switch refers to a change in the operating parameters of the air conditioner. The above technical solution achieves the goal of determining whether the evaporator is in a flow deviation state by monitoring the rate of change of pipe temperature in the evaporator and the rate of change of ambient temperature. If it is determined to be in a flow deviation state, the flow deviation of the evaporator is suppressed by adjusting the opening of the electronic expansion valve to restore it to normal. This achieves the technical effect of monitoring and adjusting the flow deviation of the evaporator to avoid the air conditioner's cooling effect being reduced due to the flow deviation of the evaporator, thus improving the user experience. It also solves the technical problem in related technologies that the air conditioner's cooling effect is reduced due to the flow deviation of the evaporator, which easily leads to serious power consumption and affects the user experience. Attached Figure Description

[0026] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and, together with their description, serve to explain the invention and do not constitute an undue limitation thereof. In the drawings:

[0027] Figure 1 This is a hardware structure block diagram of a mobile terminal for an air conditioner control method for preventing airflow deviation according to an embodiment of the present invention.

[0028] Figure 2 This is a flowchart of an air conditioner control method for preventing flow deviation according to an embodiment of the present invention;

[0029] Figure 3 This is a flowchart of an optional air conditioner control method for preventing flow deviation according to an embodiment of the present invention;

[0030] Figure 4 This is a flowchart of another optional air conditioner control method for preventing airflow deviation according to an embodiment of the present invention;

[0031] Figure 5 This is a schematic diagram of an air conditioner control device for preventing airflow deviation according to an embodiment of the present invention. Detailed Implementation

[0032] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0033] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0034] As described in the background section, in related technologies, evaporator flow deviation leads to poor cooling performance in air conditioners, resulting in high power consumption and negatively impacting user experience. To address these shortcomings, embodiments of the present invention provide an air conditioner control method and apparatus for preventing flow deviation, along with an evaporator and an air conditioner.

[0035] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0036] The methods and embodiments provided in this invention can be executed on a mobile terminal, a computer terminal, or a similar computing device. Taking running on a mobile terminal as an example, Figure 1 This is a hardware structure block diagram of a mobile terminal for an air conditioner control method to prevent airflow deviation, according to an embodiment of the present invention. Figure 1 As shown, a mobile terminal may include one or more ( Figure 1 Only one is shown in the diagram. A processor 102 (which may include, but is not limited to, a microprocessor MCU or a programmable logic device FPGA, etc.) and a memory 104 for storing data are also shown. The mobile terminal may further include a transmission device 106 for communication functions and an input / output device 108. Those skilled in the art will understand that... Figure 1 The structure shown is for illustrative purposes only and does not limit the structure of the mobile terminal described above. For example, the mobile terminal may also include components that are more... Figure 1 The more or fewer components shown, or having the same Figure 1 The different configurations shown.

[0037] The memory 104 can be used to store computer programs, such as application software programs and modules, like the computer program corresponding to the air conditioner control method for preventing airflow deviation in this embodiment of the invention. The processor 102 executes various functional applications and data processing by running the computer program stored in the memory 104, thereby implementing the above-described method. The memory 104 may include high-speed random access memory and may also include non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some instances, the memory 104 may further include memory remotely located relative to the processor 102, and these remote memories can be connected to the mobile terminal via a network. Examples of the aforementioned networks include, but are not limited to, the Internet, corporate intranets, local area networks, mobile communication networks, and combinations thereof. The transmission device 106 is used to receive or send data via a network. Specific examples of the aforementioned networks may include wireless networks provided by the mobile terminal's communication provider. In one example, the transmission device 106 includes a network interface controller (NIC), which can be connected to other network devices via a base station to communicate with the Internet. In one example, the transmission device 106 may be a radio frequency (RF) module, which is used to communicate with the Internet wirelessly.

[0038] According to an embodiment of the present invention, a method embodiment for preventing airflow deviation in an air conditioner control method is provided. It should be noted that the steps shown in the flowchart in the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions. Furthermore, although a logical order is shown in the flowchart, in some cases, the steps shown or described may be executed in a different order than that shown here.

[0039] Figure 2 This is a flowchart of an air conditioner control method for preventing airflow deviation according to an embodiment of the present invention, such as... Figure 2 As shown, the method includes the following steps:

[0040] Step S202, Acquisition Step: When the ambient temperature in the target room where the air conditioner is located reaches the predetermined temperature, acquire the pipe temperature change rate and the ambient temperature change rate within the current time period, wherein the pipe temperature is the temperature of the evaporator pipe in the air conditioner, and the duration of the time period is the predetermined duration.

[0041] In this embodiment, after the ambient temperature of the room where the air conditioner is located reaches the temperature preset by the user or the system, the rate of change of pipe temperature in the evaporator of the air conditioner (i.e., pipe temperature change rate) and the rate of change of ambient temperature (i.e., ambient temperature change rate) can be monitored in real time. Then, the state of the evaporator can be monitored in real time based on the comparison results of the pipe temperature change rate and the ambient temperature change rate with the corresponding thresholds to determine whether there is a flow deviation phenomenon (i.e., whether it is in a flow deviation state). Here, the rate of change of pipe temperature and the rate of change of ambient temperature refer to the ratio of the difference between the temperature (including pipe temperature and ambient temperature) at a certain moment during the operation of the air conditioner after the ambient temperature reaches the preset temperature and the temperature after a preset time period to the preset time period. For example, the difference between the pipe temperature and the ambient temperature at a certain moment and the pipe temperature and the ambient temperature 1 second later can be used as the rate of change of pipe temperature and the rate of change of ambient temperature in the current time period (1 second as an example).

[0042] According to the above embodiments of the present invention, in step S202, when the ambient temperature in the target room where the air conditioner is located reaches a predetermined temperature, obtaining the pipe temperature change rate and the ambient temperature change rate within the current time period includes: after the air conditioner is started, obtaining the operating mode of the air conditioner; when the operating mode is cooling mode, obtaining the ambient temperature in the target room according to a predetermined period; when the ambient temperature reaches the predetermined temperature, controlling the air conditioner to operate at a predetermined frequency, wherein the predetermined frequency is lower than a frequency threshold; and during the operation of the air conditioner at the predetermined frequency, obtaining the pipe temperature change rate and the ambient temperature change rate within the current time period.

[0043] The following is combined Figure 3 and Figure 4 The embodiments of the present invention will be described in detail below. Figure 3 This is a flowchart of an optional air conditioner control method for preventing airflow deviation according to an embodiment of the present invention. Figure 4 This is a flowchart of another optional air conditioner control method for preventing airflow deviation according to an embodiment of the present invention.

[0044] As above Figure 3 and above Figure 4 As shown, after the air conditioner is started, the operating mode of the air conditioner is first determined. When the air conditioner is running in cooling mode, the ambient temperature of the room is monitored in real time. After the ambient temperature reaches the temperature preset by the user or the system, the air conditioner is controlled to run at low frequency. During this process, the pipe temperature change rate and ambient temperature change rate are obtained in real time within the current time period.

[0045] Step S204, Determination Step: When the pipe temperature change rate is greater than the first rate threshold and the ambient temperature change rate is less than the second rate threshold, it is determined that the evaporator is in a flow-off state. The first rate threshold is the threshold for judging whether the evaporator is in a flow-off state based on the pipe temperature change rate, and the second rate threshold is the threshold for judging whether the evaporator is in a flow-off state based on the ambient temperature change rate. Flow-off state refers to the state in which the refrigerant is unevenly distributed in the pipes of the evaporator.

[0046] In this embodiment, as described above Figure 3 As shown, the rate of change of pipe temperature can be compared with a first rate threshold, and the rate of change of ambient temperature can be compared with a second rate threshold to determine whether the evaporator has experienced flow deviation. Here, the rate of change of pipe temperature can be compared with the first rate threshold first. If the rate of change of pipe temperature is not greater than the first rate threshold, it is considered that the current evaporator has not experienced flow deviation. If the rate of change of pipe temperature is greater than the first rate threshold, the magnitude of the rate of change of ambient temperature and the second rate threshold can be further determined. If the rate of change of pipe temperature is greater than the first rate threshold and the rate of change of ambient temperature is not less than the second rate threshold, it is considered that the current evaporator still has not experienced flow deviation. If the rate of change of pipe temperature is greater than the first rate threshold and the rate of change of ambient temperature is less than the second rate threshold, it is considered that the current evaporator has experienced flow deviation.

[0047] For example, as above Figure 4 As shown, assuming (T) 内管1 -T 内管2 ) / 1s≤S 预设1 , here T 内管1 The pipe temperature at a specific moment t during the low-frequency operation of an air conditioner, T 内管2 The pipe temperature (S) is the temperature of the pipeline 1 second after the given time t. 预设1The first rate threshold is defined as S1, where the rate of change in pipe temperature within 1 second is S1. In this case, it is assumed that there is no flow deviation in the evaporator. Assuming T... 内管1 -T 内管2 ) / 1s>S 预设1 Then, further consider the ambient temperature T at time t. 内环1 The ambient temperature T 1 second after that time t 内环2 The difference between them (i.e., the rate of change of ambient temperature S2 within this 1 second) and the second rate threshold S 预设2 Compare, that is, if T 内管1 -T 内管2 ) / 1s>S 预设1 And T 内环1 -T 内环2 ) / 1s≥S 预设2 If T 内管1 -T 内管2 ) / 1s>S 预设1 And T 内环1 -T 内环2 ) / 1s 预设2 If this is the case, it is considered that the evaporator is experiencing a flow deviation phenomenon.

[0048] When the air conditioner is in cooling mode and the ambient temperature is relatively low, a normal evaporator should be able to absorb heat evenly, causing the pipe temperature (i.e., the temperature of the refrigerant inside the evaporator) to change at the expected rate. If the pipe temperature change rate S1 exceeds the first rate threshold S... 预设1 This could mean that the refrigerant is evaporating abnormally fast in a certain part, possibly due to excessive refrigerant flow or excessive cold absorption in that section; while the rate of change of ambient temperature (equivalent to the air temperature around the evaporator) reflects the change in the overall cooling effect of the evaporator on the surrounding air. If the rate of change of ambient temperature S2 is lower than the second rate threshold S... 预设2 This may mean that the overall cooling efficiency of the evaporator is low, that is, the ambient temperature does not drop as expected. This is usually caused by uneven distribution of refrigerant in the evaporator, with some areas having too much refrigerant leading to localized overcooling, while other areas have insufficient refrigerant, resulting in poor overall heat exchange efficiency. Combining these two conditions, when S1>S 预设1 This means that the refrigerant in a certain part of the pipeline is absorbing heat abnormally, possibly due to localized overcooling; while S2 预设2 If the refrigerant distribution is uneven, it indicates that the overall cooling effect of the evaporator is poor. In this case, it usually means that the refrigerant is distributed unevenly in the evaporator, that is, the flow deviation has occurred, which leads to a decrease in the operating efficiency of the evaporator.

[0049] Step S206, control step: when it is determined that the evaporator is in a biased flow state, control the electronic expansion valve to increase the opening by a predetermined degree based on the current opening degree.​​

[0050] In this embodiment, as described above Figure 3 As shown, when the evaporator exhibits a flow deviation phenomenon, i.e., when the evaporator is in a flow deviation state, the opening of the electronic expansion valve can be corrected to adjust the refrigerant flow and thus reduce the flow deviation phenomenon of the evaporator.

[0051] According to the above embodiments of the present invention, in step S206, when it is determined that the evaporator is in a biased flow state, controlling the electronic expansion valve to increase the opening by a predetermined degree based on the current opening degree includes: when it is determined that the evaporator is in a biased flow state, obtaining the current opening degree of the electronic expansion valve; when the current opening degree does not reach the opening threshold, controlling the electronic expansion valve to increase the opening by a predetermined degree based on the current opening degree.

[0052] Specifically, when it is necessary to correct the opening degree of the electronic expansion valve, it can be first determined whether the current opening degree of the electronic expansion valve has reached the opening threshold (such as 60P). If the current opening degree of the electronic expansion valve has not yet reached the opening threshold, the electronic expansion valve can be controlled to increase the predetermined opening degree based on the current opening degree.

[0053] Step S208: Repeat the acquisition step, determination step and control step at least once in sequence until the current opening degree of the electronic expansion valve reaches the opening degree threshold, or until the air conditioner undergoes a state switch, wherein the state switch refers to a change in the operating parameters of the air conditioner.

[0054] In this embodiment, the above steps can be repeated sequentially until the current opening degree of the electronic expansion valve reaches the opening degree threshold or the air conditioner undergoes a state switch. At this point, the monitoring of whether the evaporator is experiencing flow deviation can be stopped, and when flow deviation occurs, the opening degree of the electronic expansion valve can be adjusted to reduce the flow deviation of the evaporator.

[0055] It should be noted that correcting the opening degree of the electronic expansion valve and determining whether the current opening degree has reached the opening threshold is actually a dynamic process, as described above. Figure 4 As shown, it can also be done at T 内管1 -T 内管2 ) / 1s>S 预设1 And T 内环1 -T 内环2 ) / 1s 预设2 ​In cases where it is assumed that the evaporator is experiencing flow deviation and the opening of the electronic expansion valve needs to be adjusted, the opening of the electronic expansion valve can be increased at a predetermined step frequency (e.g., 1P / 5s, i.e., increasing by 1P every 5s). During this process, it can be determined in real time whether the opening of the electronic expansion valve has reached the opening threshold. If the opening of the electronic expansion valve reaches the opening threshold during this process, or if the air conditioner undergoes a state switch (including but not limited to changes in operating mode, fan speed, frequency, etc.) or stops, the process of increasing the opening of the electronic expansion valve at the predetermined step frequency (e.g., 1P / 5s, i.e., increasing by 1P every 5s) can be stopped.

[0056] According to the above embodiments of the present invention, the air conditioner control method for preventing flow deviation further includes: when the current opening degree of the electronic expansion valve reaches an opening threshold, controlling the air conditioner to operate according to the current state; when the duration of the air conditioner operating according to the current state reaches a preset duration, performing an acquisition step to obtain the current pipe temperature change rate and ambient temperature change rate; when the current pipe temperature change rate is greater than a first rate threshold and the current ambient temperature change rate is less than a second rate threshold, determining that the evaporator is still in a flow deviation state; when it is determined that the evaporator is still in a flow deviation state, detecting whether the current opening degree of the electronic expansion valve has changed, and obtaining a detection result; and controlling the electronic expansion valve or the air conditioner to perform an adjustment operation according to the detection result, so that the evaporator returns from the flow deviation state to a non-flow deviation state, wherein the non-flow deviation state refers to the state in which the refrigerant is evenly distributed in the pipes of the evaporator.

[0057] As above Figure 3 and above Figure 4 As shown, when the opening degree of the electronic expansion valve reaches the opening threshold of 60P, the air conditioner can be controlled to run in the current state for 30 minutes (i.e., the preset time, taking 30 minutes as an example). Then, the current pipe temperature change rate and ambient temperature change rate are reacquired, and it is determined whether the evaporator still has a flow deviation phenomenon. Since the opening degree of the electronic expansion valve will be automatically adjusted according to the change of the air conditioner's operating conditions during operation, it is possible to first determine whether the opening degree of the electronic expansion valve has changed after the air conditioner has run in the current state for 30 minutes. Then, based on the judgment result (i.e., the above detection result), the electronic expansion valve or the air conditioner is controlled to perform the corresponding adjustment operation to reduce the flow deviation phenomenon of the evaporator and restore it to a non-flow deviation state.

[0058] In the above embodiments of the present invention, the adjustment operation performed on the air conditioner according to the detection result to restore the evaporator from the biased flow state to the non-biased flow state includes: when the detection result indicates that the current opening degree has changed and the changed current opening degree is still less than the opening degree threshold, controlling the electronic expansion valve to increase the opening degree by a predetermined degree based on the current opening degree to restore the evaporator from the biased flow state to the non-biased flow state; when the detection result indicates that the current opening degree has not changed, or when the detection result indicates that the current opening degree has changed and the changed current opening degree is greater than the opening degree threshold, controlling the air conditioner to perform the adjustment operation to restore the evaporator from the biased flow state to the non-biased flow state.

[0059] Specifically, if the opening of the electronic expansion valve changes after the air conditioner has been running for 30 minutes in its current state, and the changed opening is still less than the opening threshold, the opening of the electronic expansion valve can be adjusted according to the method described above for controlling the electronic expansion valve to increase its opening, in order to reduce the evaporator's flow deviation phenomenon and restore it to a non-flow deviation state. If the opening of the electronic expansion valve does not change after the air conditioner has been running for 30 minutes in its current state, or if the opening of the electronic expansion valve changes, and the changed opening is still greater than the opening threshold, it can be considered that another problem has occurred in the air conditioner that has caused the evaporator's flow deviation phenomenon. In this case, the air conditioner can be controlled to take other measures to make corresponding adjustments so that the evaporator can be restored from the flow deviation state to the non-flow deviation state.

[0060] In a specific embodiment of the present invention, controlling the air conditioner to perform an adjustment operation to restore the evaporator from a biased flow state to a non-biased flow state includes at least one of the following: controlling the air conditioner to perform a self-cleaning operation to make the refrigerant flowability higher than the flowability threshold, so as to restore the evaporator from a biased flow state to a non-biased flow state; controlling the air conditioner to perform a refrigerant adjustment operation to adaptively adjust the type and charge amount of refrigerant, so as to restore the evaporator from a biased flow state to a non-biased flow state; controlling the air conditioner to perform an airflow guidance adjustment operation to make the cold air generated by the refrigerant during the evaporation process evenly distributed on the surface of the evaporator, so as to restore the evaporator from a biased flow state to a non-biased flow state.

[0061] Specifically, the following measures can be taken to alleviate the evaporator's flow deviation phenomenon, so that the evaporator can return from a flow deviation state to a non-flow deviation state: 1) Optimize airflow distribution: Check and adjust the air duct design or airflow guiding components inside the air conditioner, such as fan blades and air guides, to ensure that the cold air generated during refrigerant evaporation can be evenly distributed across the entire evaporator surface, thereby preventing local overcooling; 2) Enhance evaporator heat distribution: Make improvements to the evaporator design, such as increasing the number of fins or changing the fin shape, to improve heat exchange efficiency and make the refrigerant evaporate more evenly. In addition, microchannels can be added to specific areas of the evaporator to improve the refrigerant flow characteristics; 3) Introduce auxiliary control strategies: In addition to the control of the electronic expansion valve, other auxiliary control strategies can be introduced, such as optimizing the temperature sensor network. By increasing the number and distribution of temperature sensors, more accurate temperature control can be achieved. 4) Adjusting the type or charge of refrigerant: Consider whether the refrigerant type or charge is unsuitable for the current operating environment and system design, causing flow deviation. Appropriate adjustment of the refrigerant type or charge may improve the working condition of the evaporator and avoid flow deviation; 5) System self-cleaning: If the flow deviation is caused by dirt blockage inside the air conditioning system, consider introducing self-cleaning functions, such as backflushing and purging, to remove impurities in the system and improve the flow of refrigerant; 6) User interaction prompts: Consider adding user interaction functions to prompt users on the current operating status through the display screen or mobile APP, and suggest some measures, such as adjusting the indoor humidity and checking whether the air filter is blocked, to help solve the flow deviation problem from the perspective of external environment and usage habits.

[0062] In an optional embodiment of the present invention, the air conditioner control method for preventing flow deviation further includes: when the air conditioner's operating mode is not cooling mode, controlling the air conditioner to operate according to a first current operating state, wherein the first current operating state is the operating state of the air conditioner when operating in an operating mode other than cooling mode; when the pipe temperature change rate is not greater than a first rate threshold, controlling the air conditioner to operate according to a second current operating state, wherein the second current operating state refers to the operating state of the air conditioner when the pipe temperature change rate is not greater than the first rate threshold; and when the pipe temperature change rate is not greater than the first rate threshold and the ambient temperature change rate is less than a second rate threshold, controlling the air conditioner to operate according to a third current operating state, wherein the third current operating state refers to the operating state of the air conditioner when the ambient temperature change rate is not less than the second rate threshold.

[0063] Specifically, as above Figure 4As shown, the air conditioner can be controlled to operate normally under any of the following conditions: the air conditioner is not in cooling mode; the pipe temperature change rate is not greater than the first rate threshold; or the pipe temperature change rate is not greater than the first rate threshold and the ambient temperature change rate is less than the second rate threshold. This is because when the air conditioner is running in non-cooling mode, there is no anti-flow protection. Furthermore, when the pipe temperature change rate is not greater than the first rate threshold, or when the pipe temperature change rate is not greater than the first rate threshold and the ambient temperature change rate is less than the second rate threshold, the evaporator does not exhibit flow deviation, and there is no need for anti-flow protection. Therefore, the air conditioner can be controlled to operate according to its current operating state.

[0064] As can be seen from the above, through the technical solution provided by the above embodiments of the present invention, the following steps are achieved: First, when the ambient temperature in the target room where the air conditioner is located reaches a predetermined temperature, the pipe temperature change rate and the ambient temperature change rate within the current time period are obtained. Here, the pipe temperature refers to the temperature of the evaporator pipes in the air conditioner, and the time period is a predetermined duration. Second, in the determination step, when the pipe temperature change rate is greater than a first rate threshold and the ambient temperature change rate is less than a second rate threshold, it is determined that the evaporator is in a flow-biased state. Here, the first rate threshold is a threshold for judging whether the evaporator is in a flow-biased state based on the pipe temperature change rate, and the second rate threshold is a threshold for judging whether the evaporator is in a flow-biased state based on the ambient temperature change rate. A flow-biased state refers to a state where the refrigerant distribution in the evaporator pipes is uneven. The control steps involve, upon determining that the evaporator is in a flow deviation state, increasing the opening of the electronic expansion valve by a predetermined degree based on its current opening. The acquisition, determination, and control steps are repeated at least once until the current opening of the electronic expansion valve reaches the opening threshold, or until the air conditioner undergoes a state switch. A state switch refers to a change in the air conditioner's operating parameters. This achieves the goal of determining whether the evaporator is in a flow deviation state by monitoring the rate of change of pipe temperature in the evaporator and the rate of change of ambient temperature. If a flow deviation state is determined, the flow deviation of the evaporator is suppressed by adjusting the opening of the electronic expansion valve to restore it to normal. This achieves the technical effect of monitoring and adjusting the flow deviation of the evaporator to avoid a decrease in the cooling effect of the air conditioner due to evaporator flow deviation, thus improving the user experience.

[0065] Therefore, the technical solution provided by the above embodiments of the present invention solves the technical problem in the related art that the air conditioner's cooling effect is reduced due to evaporator flow deviation, which easily leads to serious power consumption and affects user experience.

[0066] It should be noted that, for the sake of simplicity, the foregoing method embodiments are all described as a series of actions. However, those skilled in the art should understand that this application is not limited to the described order of actions, as some steps may be performed in other orders or simultaneously according to this application. Furthermore, those skilled in the art should also understand that the embodiments described in the specification are preferred embodiments, and the actions and modules involved are not necessarily essential to this application.

[0067] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods according to the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of this application, 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 is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) and includes several instructions to cause a terminal device (which may be a mobile phone, computer, server, or network device, etc.) to execute the methods described in the various embodiments of this application.

[0068] According to an embodiment of the present invention, an air conditioner control device for preventing airflow deviation is also provided for implementing the above-described air conditioner control method for preventing airflow deviation. Figure 5 This is a schematic diagram of an air conditioner control device for preventing airflow deviation according to an embodiment of the present invention, as shown below. Figure 5 As shown, the device includes: a first acquisition unit 51, a first determination unit 53, a first control unit 55, and an execution unit 57. The following is a detailed description of this air conditioner control device for preventing airflow deviation.

[0069] The first acquisition unit 51 is used to perform the acquisition step, which, when the ambient temperature in the target room where the air conditioner is located reaches the predetermined temperature, acquires the pipe temperature change rate and the ambient temperature change rate within the current time period, wherein the pipe temperature is the temperature of the evaporator pipe in the air conditioner, and the duration of the time period is the predetermined duration.

[0070] The first determining unit 53 is used to perform the determining step, which determines that the evaporator is in a flow-off state when the pipe temperature change rate is greater than the first rate threshold and the ambient temperature change rate is less than the second rate threshold. The first rate threshold is the threshold for judging whether the evaporator is in a flow-off state based on the pipe temperature change rate, and the second rate threshold is the threshold for judging whether the evaporator is in a flow-off state based on the ambient temperature change rate. The flow-off state refers to the state in which the refrigerant is unevenly distributed in the pipes of the evaporator.

[0071] The first control unit 55 is used to execute control steps, and when it is determined that the evaporator is in a biased flow state, it controls the electronic expansion valve to increase the opening by a predetermined degree based on the current opening degree.

[0072] The execution unit 57 is used to repeatedly execute the acquisition step, the determination step and the control step at least once in sequence until the current opening degree of the electronic expansion valve reaches the opening degree threshold, or until the air conditioner undergoes a state switch, wherein the state switch refers to a change in the operating parameters of the air conditioner.

[0073] It should be noted that the first acquisition unit 51, the first determination unit 53, the first control unit 55, and the execution unit 57 mentioned above correspond to steps S202 to S208 in the above embodiments. The four units and the corresponding steps implement the same instances and application scenarios, but are not limited to the content disclosed in the above embodiments.

[0074] As can be seen from the above, in the solution described in the above embodiments of the present invention, the first acquisition unit can be used to perform the acquisition step. When the ambient temperature in the target room where the air conditioner is located reaches a predetermined temperature, the pipe temperature change rate and the ambient temperature change rate within the current time period are acquired. The pipe temperature refers to the temperature of the evaporator pipe in the air conditioner, and the time period is a predetermined duration. Then, the first determination unit performs the determination step. When the pipe temperature change rate is greater than a first rate threshold and the ambient temperature change rate is less than a second rate threshold, it is determined that the evaporator is in a flow-biased state. The first rate threshold is a threshold for judging whether the evaporator is in a flow-biased state based on the pipe temperature change rate, and the second rate threshold is a threshold for judging whether the evaporator is in a flow-biased state based on the ambient temperature change rate. A flow-biased state refers to a state where the refrigerant distribution in the evaporator pipe is uneven. The system utilizes the first control unit to execute control steps. If the evaporator is determined to be in a flow-off state, the system controls the electronic expansion valve to increase its opening by a predetermined degree based on its current opening. Finally, the execution unit sequentially repeats the acquisition, determination, and control steps at least once until the current opening of the electronic expansion valve reaches the opening threshold, or until the air conditioner undergoes a state switch. Here, a state switch refers to a change in the air conditioner's operating parameters. This achieves the goal of determining whether the evaporator is in a flow-off state by monitoring the rate of change of pipe temperature in the evaporator and the rate of change of ambient temperature. If a flow-off state is determined, the system adjusts the opening of the electronic expansion valve to suppress the flow-off and restore the evaporator to normal operation. This achieves the technical effect of monitoring and adjusting the flow-off of the evaporator to prevent a decrease in the air conditioner's cooling effect due to evaporator flow-off, thus improving the user experience.

[0075] Therefore, the technical solution provided by the above embodiments of the present invention solves the technical problem in the related art that the air conditioner's cooling effect is reduced due to evaporator flow deviation, which easily leads to serious power consumption and affects user experience.

[0076] Optionally, the first acquisition unit includes: a first acquisition module, used to acquire the operating mode of the air conditioner after it is started; a second acquisition module, used to acquire the ambient temperature in the target room according to a predetermined cycle when the operating mode is cooling mode; a first control module, used to control the air conditioner to operate at a predetermined frequency when the ambient temperature reaches a predetermined temperature, wherein the predetermined frequency is lower than a frequency threshold; and a third acquisition module, used to acquire the pipe temperature change rate and the ambient temperature change rate within the current time cycle during the operation of the air conditioner at the predetermined frequency.

[0077] Optionally, the first control unit includes: a fourth acquisition module, used to acquire the current opening degree of the electronic expansion valve when it is determined that the evaporator is in a biased flow state; and a second control module, used to control the electronic expansion valve to increase the opening degree by a predetermined degree based on the current opening degree when the current opening degree has not reached the opening degree threshold.

[0078] Optionally, the air conditioner control device for preventing flow deviation further includes: a second control unit, used to control the air conditioner to operate according to the current state when the current opening degree of the electronic expansion valve reaches the opening degree threshold; a second acquisition unit, used to perform an acquisition step to obtain the current pipe temperature change rate and ambient temperature change rate when the air conditioner operates according to the current state for a preset time; a second determination unit, used to determine that the evaporator is still in a flow deviation state when the current pipe temperature change rate is greater than the first rate threshold and the current ambient temperature change rate is less than the second rate threshold; a third acquisition unit, used to detect whether the current opening degree of the electronic expansion valve has changed when the evaporator is determined to be in a flow deviation state, and obtain the detection result; and an adjustment unit, used to control the electronic expansion valve or the air conditioner to perform an adjustment operation according to the detection result, so that the evaporator is restored from the flow deviation state to the non-flow deviation state, wherein the non-flow deviation state refers to the state in which the refrigerant is evenly distributed in the pipes of the evaporator.

[0079] Optionally, the adjustment unit includes: a first adjustment module, used to control the electronic expansion valve to increase the opening by a predetermined degree based on the current opening when the detection result indicates that the current opening degree has changed and the changed current opening degree is still less than the opening degree threshold, so as to restore the evaporator from the biased flow state to the non-biased flow state;

[0080] The second adjustment module is used to control the air conditioner to perform an adjustment operation when the detection result indicates that the current opening degree has not changed, or when the detection result indicates that the current opening degree has changed and the changed current opening degree is greater than the opening threshold, so as to restore the evaporator from the biased flow state to the non-biased flow state.

[0081] Optionally, the second adjustment module includes at least one of the following: a first control submodule, used to control the air conditioner to perform a self-cleaning operation, making the refrigerant flow higher than the flow threshold, so that the evaporator returns from a biased flow state to a non-biased flow state; a second control submodule, used to control the air conditioner to perform a refrigerant adjustment operation, adaptively adjusting the type and charge amount of refrigerant, so that the evaporator returns from a biased flow state to a non-biased flow state; and a third control submodule, used to control the air conditioner to perform an airflow guidance adjustment operation, so that the cold air generated by the refrigerant during evaporation is evenly distributed on the surface of the evaporator, so that the evaporator returns from a biased flow state to a non-biased flow state.

[0082] Optionally, the air conditioner control device for preventing flow deviation further includes: a third control unit, used to control the air conditioner to operate according to a first current operating state when the air conditioner's operating mode is not cooling mode, wherein the first current operating state is the operating state of the air conditioner when it is operating in an operating mode other than cooling mode; a fourth control unit, used to control the air conditioner to operate according to a second current operating state when the pipe temperature change rate is not greater than a first rate threshold, wherein the second current operating state refers to the operating state of the air conditioner when the pipe temperature change rate is not greater than the first rate threshold; and a fifth control unit, used to control the air conditioner to operate according to a third current operating state when the pipe temperature change rate is not greater than the first rate threshold and the ambient temperature change rate is less than the second rate threshold, wherein the third current operating state refers to the operating state of the air conditioner when the ambient temperature change rate is not less than the second rate threshold.

[0083] According to another aspect of the present invention, an evaporator is also provided, which uses any of the above-described methods for preventing airflow deviation in air conditioners.

[0084] According to another aspect of the present invention, an air conditioner is also provided, which uses any of the above-described methods for preventing airflow deviation.

[0085] According to another aspect of the present invention, a computer-readable storage medium is also provided, the computer-readable storage medium including a stored program, wherein the program executes any of the above-described methods for preventing airflow deviation in an air conditioner.

[0086] Optionally, in this embodiment, the computer-readable storage medium may be located in any computer terminal in a group of computer terminals in a computer network, or in any communication device in a group of communication devices.

[0087] Optionally, in this embodiment, the computer-readable storage medium is configured to store program code for performing the following steps: an acquisition step, whereby, when the ambient temperature in the target room where the air conditioner is located reaches a predetermined temperature, the pipe temperature change rate and the ambient temperature change rate within the current time period are acquired, wherein the pipe temperature is the temperature of the pipes of the evaporator in the air conditioner, and the duration of the time period is a predetermined duration; a determination step, whereby, when the pipe temperature change rate is greater than a first rate threshold and the ambient temperature change rate is less than a second rate threshold, the evaporator is determined to be in a biased flow state, wherein the first rate threshold is used to determine if the evaporator is in a biased flow state. The threshold for judging the rate of change of pipe temperature when the evaporator is in a flow-off state is a second rate threshold for judging the rate of change of ambient temperature when the evaporator is in a flow-off state. Flow-off state refers to the state in which the refrigerant is unevenly distributed in the pipes of the evaporator. Control steps: When it is determined that the evaporator is in a flow-off state, control the electronic expansion valve to increase the opening by a predetermined degree based on the current opening degree. Repeat the acquisition step, determination step and control step at least once in sequence until the current opening degree of the electronic expansion valve reaches the opening degree threshold, or until the air conditioner undergoes a state switch, where the state switch refers to a change in the operating parameters of the air conditioner.

[0088] Optionally, in this embodiment, the computer-readable storage medium is configured to store program code for performing the following steps: after the air conditioner is started, obtaining the operating mode of the air conditioner; when the operating mode is cooling mode, obtaining the ambient temperature in the target room according to a predetermined cycle; when the ambient temperature reaches a predetermined temperature, controlling the air conditioner to operate at a predetermined frequency, wherein the predetermined frequency is lower than a frequency threshold; during the operation of the air conditioner at the predetermined frequency, obtaining the pipe temperature change rate and the ambient temperature change rate within the current time cycle.

[0089] Optionally, in this embodiment, the computer-readable storage medium is configured to store program code for performing the following steps: when it is determined that the evaporator is in a biased flow state, obtaining the current opening degree of the electronic expansion valve; when the current opening degree does not reach the opening degree threshold, controlling the electronic expansion valve to increase the opening degree by a predetermined degree based on the current opening degree.

[0090] Optionally, in this embodiment, the computer-readable storage medium is configured to store program code for performing the following steps: when the current opening degree of the electronic expansion valve reaches an opening threshold, controlling the air conditioner to operate according to the current state; when the duration of the air conditioner operating according to the current state reaches a preset duration, performing an acquisition step to obtain the current pipe temperature change rate and ambient temperature change rate; when the current pipe temperature change rate is greater than a first rate threshold and the current ambient temperature change rate is less than a second rate threshold, determining that the evaporator is still in a biased flow state; when determining that the evaporator is still in a biased flow state, detecting whether the current opening degree of the electronic expansion valve has changed, and obtaining the detection result; controlling the electronic expansion valve or the air conditioner to perform an adjustment operation according to the detection result, so that the evaporator returns from the biased flow state to a non-biased flow state, wherein the non-biased flow state refers to the state in which the refrigerant is evenly distributed in the pipes of the evaporator.

[0091] Optionally, in this embodiment, the computer-readable storage medium is configured to store program code for performing the following steps: when the detection result indicates that the current opening degree has changed and the changed current opening degree is still less than the opening degree threshold, the electronic expansion valve is controlled to increase the opening degree by a predetermined degree based on the current opening degree, so that the evaporator returns from the biased flow state to the non-biased flow state; when the detection result indicates that the current opening degree has not changed, or when the detection result indicates that the current opening degree has changed and the changed current opening degree is greater than the opening degree threshold, the air conditioner is controlled to perform an adjustment operation, so that the evaporator returns from the biased flow state to the non-biased flow state.

[0092] Optionally, in this embodiment, the computer-readable storage medium is configured to store program code for performing the following steps: controlling the air conditioner to perform a self-cleaning operation, making the refrigerant flow higher than the flow threshold, so that the evaporator returns from a biased flow state to a non-biased flow state; controlling the air conditioner to perform a refrigerant adjustment operation, adaptively adjusting the type and charge amount of the refrigerant, so that the evaporator returns from a biased flow state to a non-biased flow state; controlling the air conditioner to perform an airflow guidance adjustment operation, so that the cold air generated by the refrigerant during evaporation is evenly distributed on the surface of the evaporator, so that the evaporator returns from a biased flow state to a non-biased flow state.

[0093] Optionally, in this embodiment, the computer-readable storage medium is configured to store program code for performing the following steps: when the air conditioner's operating mode is not cooling mode, controlling the air conditioner to operate according to a first current operating state, wherein the first current operating state is the operating state of the air conditioner when it is operating in an operating mode other than cooling mode; when the pipe temperature change rate is not greater than a first rate threshold, controlling the air conditioner to operate according to a second current operating state, wherein the second current operating state refers to the operating state of the air conditioner when the pipe temperature change rate is not greater than the first rate threshold; when the pipe temperature change rate is not greater than the first rate threshold and the ambient temperature change rate is less than the second rate threshold, controlling the air conditioner to operate according to a third current operating state, wherein the third current operating state refers to the operating state of the air conditioner when the ambient temperature change rate is not less than the second rate threshold.

[0094] According to another aspect of the present invention, a processor is also provided, which is used to run a program, wherein the program executes any of the above-described methods for preventing airflow deviation in an air conditioner.

[0095] According to another aspect of the present invention, a computer program product is also provided, including computer instructions, which, when executed by a processor, perform any of the above-described methods for preventing airflow deviation in an air conditioner.

[0096] The sequence numbers of the above embodiments of the present invention are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0097] In the above embodiments of the present invention, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0098] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. The device embodiments described above are merely illustrative; for example, the division of units can be a logical functional division, and in actual implementation, there may be other division methods. For instance, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the displayed or discussed mutual coupling, direct coupling, or communication connection may be through some interfaces; the indirect coupling or communication connection between units or modules may be electrical or other forms.

[0099] 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 units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0100] Furthermore, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0101] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or 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, read-only memory (ROM), random access memory (RAM), portable hard drives, magnetic disks, or optical disks.

[0102] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A method for controlling an air conditioner to prevent airflow deviation, characterized in that, include: The acquisition step involves obtaining the pipe temperature change rate and the ambient temperature change rate within the current time period when the ambient temperature in the target room where the air conditioner is located reaches a predetermined temperature. The pipe temperature is the temperature of the evaporator pipe in the air conditioner, and the duration of the time period is a predetermined duration. The determination step involves determining that the evaporator is in a flow-off state when the pipe temperature change rate is greater than a first rate threshold and the ambient temperature change rate is less than a second rate threshold. The first rate threshold is a threshold used to determine whether the evaporator is in the flow-off state based on the pipe temperature change rate, and the second rate threshold is a threshold used to determine whether the evaporator is in the flow-off state based on the ambient temperature change rate. The flow-off state refers to a state where the refrigerant distribution in the evaporator's pipes is uneven. In the control step, when it is determined that the evaporator is in the biased flow state, the electronic expansion valve is controlled to increase the opening by a predetermined degree based on the current opening degree; The acquisition step, the determination step, and the control step are executed at least once in sequence until the current opening degree of the electronic expansion valve reaches the opening degree threshold, or until the air conditioner undergoes a state switch, wherein the state switch refers to a change in the operating parameters of the air conditioner.

2. The air conditioner control method for preventing airflow deviation according to claim 1, characterized in that, When the ambient temperature in the target room where the air conditioner is located reaches a predetermined temperature, the rate of change of pipe temperature and the rate of change of ambient temperature within the current time period are obtained, including: After the air conditioner is started, the operating mode of the air conditioner is obtained; When the operating mode is cooling mode, the ambient temperature in the target room is acquired according to a predetermined cycle; When the ambient temperature reaches the predetermined temperature, the air conditioner is controlled to operate at a predetermined frequency, wherein the predetermined frequency is lower than a frequency threshold. During the operation of the air conditioner at the predetermined frequency, the rate of change of pipe temperature and the rate of change of ambient temperature within the current time period are obtained.

3. The air conditioner control method for preventing airflow deviation according to claim 1, characterized in that, When it is determined that the evaporator is in the biased flow state, controlling the electronic expansion valve to increase its opening by a predetermined degree based on its current opening includes: If it is determined that the evaporator is in the biased flow state, the current opening degree of the electronic expansion valve is obtained; If the current opening degree does not reach the opening degree threshold, the electronic expansion valve is controlled to increase the predetermined opening degree based on the current opening degree.

4. The air conditioner control method for preventing airflow deviation according to claim 1, characterized in that, Also includes: When the current opening degree of the electronic expansion valve reaches the opening degree threshold, the air conditioner is controlled to operate according to the current state; When the air conditioner operates in the current state for a preset duration, the acquisition step is performed to obtain the current pipe temperature change rate and the ambient temperature change rate. If the current rate of change of the pipe temperature is greater than the first rate threshold and the current rate of change of the ambient temperature is less than the second rate threshold, it is determined that the evaporator is still in the biased flow state. If it is determined that the evaporator is still in the biased flow state, the current opening degree of the electronic expansion valve is detected to see if it has changed, and the detection result is obtained. Based on the detection results, the electronic expansion valve or the air conditioner is controlled to perform an adjustment operation to restore the evaporator from the biased flow state to the non-biased flow state, wherein the non-biased flow state refers to the state in which the refrigerant is evenly distributed in the pipeline of the evaporator.

5. The air conditioner control method for preventing airflow deviation according to claim 4, characterized in that, Based on the detection results, an adjustment operation is performed on the air conditioner to restore the evaporator from the biased flow state to a non-biased flow state, including: If the detection result indicates that the current opening degree has changed, and the changed current opening degree is still less than the opening threshold, the electronic expansion valve is controlled to increase the predetermined opening degree based on the current opening degree, so that the evaporator returns from the biased flow state to the non-biased flow state; If the detection result indicates that the current opening degree has not changed, or if the detection result indicates that the current opening degree has changed and the changed current opening degree is greater than the opening threshold, the air conditioner is controlled to perform the adjustment operation so that the evaporator returns from the biased flow state to the non-biased flow state.

6. The air conditioner control method for preventing airflow deviation according to claim 5, characterized in that, Controlling the air conditioner to perform the adjustment operation to restore the evaporator from the biased flow state to the non-biased flow state includes at least one of the following: The air conditioner is controlled to perform a self-cleaning operation, so that the refrigerant flow is higher than the flow threshold, so that the evaporator returns from the biased flow state to the non-biased flow state; The air conditioner is controlled to perform a refrigerant adjustment operation, adaptively adjusting the type and charge amount of the refrigerant to restore the evaporator from the biased flow state to the non-biased flow state; The air conditioner is controlled to perform an airflow guidance adjustment operation, so that the cold air generated by the refrigerant during the evaporation process is evenly distributed on the surface of the evaporator, so that the evaporator returns from the deflection state to the non-deflection state.

7. The air conditioner control method for preventing flow deviation according to any one of claims 1 to 6, characterized in that, Also includes: When the air conditioner is not in cooling mode, the air conditioner is controlled to operate according to a first current operating state, wherein the first current operating state is the operating state of the air conditioner when it is running in an operating mode other than cooling mode; When the rate of change of pipe temperature is not greater than the first rate threshold, the air conditioner is controlled to operate according to the second current operating state, wherein the second current operating state refers to the operating state of the air conditioner when the rate of change of pipe temperature is not greater than the first rate threshold. When the rate of change of pipe temperature is not greater than the first rate threshold and the rate of change of ambient temperature is less than the second rate threshold, the air conditioner is controlled to operate according to the third current operating state, wherein the third current operating state refers to the operating state of the air conditioner when the rate of change of ambient temperature is not less than the second rate threshold.

8. An air conditioner control device for preventing airflow deviation, characterized in that, include: The first acquisition unit is used to perform the acquisition step, which, when the ambient temperature in the target room where the air conditioner is located reaches a predetermined temperature, acquires the pipe temperature change rate and the ambient temperature change rate within the current time period, wherein the pipe temperature is the temperature of the pipe of the evaporator in the air conditioner, and the duration of the time period is a predetermined duration. The first determining unit is used to perform a determining step, which determines that the evaporator is in a flow-off state when the pipe temperature change rate is greater than a first rate threshold and the ambient temperature change rate is less than a second rate threshold. The first rate threshold is a threshold for judging the pipe temperature change rate when determining whether the evaporator is in the flow-off state, and the second rate threshold is a threshold for judging the ambient temperature change rate when determining whether the evaporator is in the flow-off state. The flow-off state refers to a state in which the refrigerant is unevenly distributed in the pipes of the evaporator. The first control unit is used to execute control steps, and when it is determined that the evaporator is in the biased flow state, it controls the electronic expansion valve to increase the opening by a predetermined degree based on the current opening degree; An execution unit is configured to sequentially and repeatedly execute the acquisition step, the determination step, and the control step at least once, until the current opening degree of the electronic expansion valve reaches the opening degree threshold, or until the air conditioner undergoes a state switch, wherein the state switch refers to a change in the operating parameters of the air conditioner.

9. An evaporator, characterized in that, The evaporator uses the air conditioner control method for preventing flow deviation as described in any one of claims 1 to 7.

10. An air conditioner, characterized in that, The air conditioner uses the air conditioner control method for preventing airflow deviation as described in any one of claims 1 to 7.

11. A computer-readable storage medium, characterized in that, The computer-readable storage medium includes a stored program, wherein the program executes the air conditioner control method for preventing airflow deviation as described in any one of claims 1 to 7.

12. A computer program product comprising computer instructions, characterized in that, When the computer instructions are executed by the processor, the air conditioner control method for preventing airflow deviation as described in any one of claims 1 to 7 is performed.

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