Air conditioner control method and device for preventing bias current, evaporator and air conditioner

Abstract

The invention discloses an air conditioner control method and device for preventing bias current, an evaporator and an air conditioner. The method comprises the steps that under the condition that the environment temperature in a target room where the air conditioner is located reaches a preset temperature, the pipe temperature change rate of the pipeline temperature and the environment temperature change rate of the environment temperature in the current time period are obtained; under the condition that the pipe temperature change rate is larger than a first rate threshold value and the environment temperature change rate is smaller than a second rate threshold value, it is determined that the evaporator is in a bias flow state; the electronic expansion valve is controlled to increase the preset opening degree on the basis of the current opening degree; and sequentially and repeatedly executing the steps for at least one time until the current opening degree of the electronic expansion valve reaches the opening degree threshold value, or until the state of the air conditioner is switched. The technical problems that the refrigerating effect of the air conditioner becomes poor due to bias flow of the evaporator, power consumption is serious easily, and user experience is affected in the prior art are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of household appliance control, and in particular to an air conditioner control method and device for preventing bias flow, an evaporator, and an air conditioner. Background Art

[0002] At present, air conditioners are used in more and more occasions. The normal use environment is to open the cooling mode at high temperature, but some special occasions or usage conditions may be abnormal. When cooling is also needed at low temperatures, such as hospitals and laboratories, because the air conditioner will try to close the use space when in use, the humidity of the room will also decrease over time, which makes the evaporator prone to flow deviation; if the air conditioning system is dirty and blocked, the evaporator will also have flow deviation, resulting in uneven temperature of part or all of the evaporator flow path, which will lead to poor cooling effect, and even frost and ice due to low temperature; not only does it have a great impact on the user's comfort, but also the power consumption is more serious.

[0003] After a traditional variable frequency air conditioner is turned on by remote control, the opening of the electronic expansion valve will stabilize and no longer change as the exhaust reaches the target exhaust temperature after the ambient temperature reaches the preset temperature. When the ambient temperature is relatively low and the user still needs to use the air conditioner, the ambient temperature is close to the preset temperature and it is easy to reach the temperature point. As the air conditioner is used for a longer period of time, the humidity in the inner ring will become lower and lower. When the humidity is low, the evaporator is more likely to have a bias flow. After the evaporator has a bias flow, if the temperature of the pipe temperature drops below 0°C, the anti-freeze protection will be triggered. At this time, the evaporator will not freeze. If the temperature of the evaporator rises sharply, the temperature of other flow paths of the evaporator will drop, and the temperature will get lower and lower as time goes by, resulting in freezing. However, the evaporator cannot enter the anti-freeze protection, which not only seriously affects the cooling effect and has a great impact on the user experience, but also the prolonged high-frequency operation time also leads to energy loss.

[0004] With regard to the problem in the above-mentioned related technologies that the cooling effect of the air conditioner is deteriorated due to the biased flow of the evaporator, which easily causes serious power consumption and affects the user experience, no effective solution has been proposed so far. Summary of the invention

[0005] The embodiments of the present invention provide an air conditioner control method and device, an evaporator, and an air conditioner for preventing bias flow, so as to at least solve the technical problems in the related art that the cooling effect of the air conditioner is deteriorated due to bias flow of the evaporator, which easily causes serious power consumption and affects the user experience.

[0006] According to one aspect of an embodiment of the present invention, there is provided an air conditioner control method for preventing bias flow, comprising: an acquisition step, in which, when the ambient temperature in a target room where the air conditioner is located reaches a predetermined temperature, a pipe temperature change rate of the pipe temperature and a ring temperature change rate of the ambient temperature within a current time period are acquired, 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; a determination step, in which, when the pipe temperature change rate is greater than a first rate threshold and the ring temperature change rate is less than a second rate threshold, it is determined that the evaporator is in a bias flow state, wherein the first rate threshold is used to determine whether the evaporator is in the bias flow 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 bias state, and the bias state refers to the state of uneven distribution of refrigerant in the pipe of the evaporator; a control step, when it is determined that the evaporator is in the bias state, controlling the electronic expansion valve to increase a predetermined opening degree based on the current opening degree; repeating 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 threshold value, or until the air conditioner switches state, 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, the pipe temperature change rate of the pipe temperature and the ambient temperature change rate of the ambient temperature in 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 a cooling mode, the ambient temperature in the target room is obtained according to a predetermined period; 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 process of the air conditioner operating at the predetermined frequency, the pipe temperature change rate and the ambient temperature change rate in the current time period are obtained.

[0008] Optionally, when it is determined that the evaporator is in the bias flow state, the electronic expansion valve is controlled to increase the predetermined opening based on the current opening, including: when it is determined that the evaporator is in the bias flow state, obtaining the current opening of the electronic expansion valve; when the current opening does not reach the opening threshold, controlling the electronic expansion valve to increase the predetermined opening based on the current opening.

[0009] Optionally, the air conditioner control method for preventing bias flow also includes: when the current opening of the electronic expansion valve reaches the opening threshold, controlling the air conditioner to operate according to the current state; when the air conditioner has been operating in the current state for a preset time, executing 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 bias flow state; when it is determined that the evaporator is still in the bias flow state, detecting whether the current opening of the electronic expansion valve has changed to obtain a detection result; and according to the detection result, controlling the electronic expansion valve or the air conditioner to perform an adjustment operation to restore the evaporator from the bias flow state to a non-bias flow state, wherein the non-bias flow state refers to a state in which the refrigerant in the pipeline of the evaporator is evenly distributed.

[0010] Optionally, an adjustment operation is performed on the air conditioner according to the detection result to restore the evaporator from the bias flow state to the non-bias flow state, including: when the detection result indicates that the current opening has changed and the current opening after the change is still less than the opening threshold, controlling the electronic expansion valve to increase the predetermined opening on the basis of the current opening to restore the evaporator from the bias flow state to the non-bias flow state; when the detection result indicates that the current opening has not changed, or the detection result indicates that the current opening has changed and the current opening after the change is greater than the opening threshold, controlling the air conditioner to perform the adjustment operation to restore the evaporator from the bias flow state to the non-bias flow state.

[0011] Optionally, controlling the air conditioner to perform the adjustment operation so that the evaporator is restored from the bias flow state to the non-bias flow state includes at least one of the following: controlling the air conditioner to perform a self-cleaning operation so that the fluidity of the refrigerant is higher than a fluidity threshold so that the evaporator is restored from the bias flow state to the non-bias flow state; controlling the air conditioner to perform a refrigerant adjustment operation to adaptively adjust the type and charge amount of the refrigerant so that the evaporator is restored from the bias flow state to the non-bias flow state; controlling the air conditioner to perform an airflow guide 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 is restored from the bias flow state to the non-bias flow state.

[0012] Optionally, the air conditioner control method for preventing bias flow also includes: when the operating mode of the air conditioner is not the 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 operates in an operating mode other than the 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 an embodiment of the present invention, there is also provided an air conditioner control device for preventing bias flow, comprising: a first acquisition unit, for executing an acquisition step, for acquiring, when the ambient temperature in the target room where the air conditioner is located reaches a predetermined temperature, a pipe temperature change rate of the pipe temperature within a current time period and a ring temperature change rate of the ambient temperature, 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; a first determination unit, for executing a determination step, for determining, when the pipe temperature change rate is greater than a first rate threshold and the ring temperature change rate is less than a second rate threshold, that the evaporator is in a bias flow state, wherein the first rate threshold is used to determine whether the evaporator is in the bias flow state The first control unit is used to execute a control step, and when it is determined that the evaporator is in the bias state, the electronic expansion valve increases a predetermined opening degree based on the current opening degree; the execution unit 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 threshold, or until the air conditioner switches state, wherein the state switching refers to a change in the operating parameters of the air conditioner.

[0014] Optionally, the first acquisition unit includes: a first acquisition module, used to acquire the operating mode of the air conditioner after the air conditioner is started; a second acquisition module, used to acquire the ambient temperature in the target room according to a predetermined period when the operating mode is a cooling mode; a first control module, used 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, used to acquire the pipe temperature change rate and the ambient temperature change rate within the current time period during the process of the air conditioner operating at the predetermined frequency.

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

[0016] Optionally, the air conditioner control device for preventing bias flow also includes: a second control unit, used to control the air conditioner to operate according to the current state when the current opening of the electronic expansion valve reaches the opening threshold; a second acquisition unit, used to execute the acquisition step to obtain the current pipe temperature change rate and the ambient temperature change rate when the air conditioner has been operating in the current state for a preset time; a second determination unit, used to determine that the evaporator is still in the bias flow 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 of the electronic expansion valve has changed and obtain a detection result when it is determined that the evaporator is still in the bias flow state; 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 bias flow state to the non-bias flow state, wherein the non-bias flow state refers to a state in which the refrigerant in the pipeline of the evaporator is evenly distributed.

[0017] Optionally, the adjustment unit comprises: a first adjustment module, configured to control the electronic expansion valve to increase the predetermined opening degree based on the current opening degree when the detection result indicates that the current opening degree has changed and the current opening degree after the change 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;

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

[0019] 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, so that the fluidity of the refrigerant is higher than the fluidity threshold, so that the evaporator is restored from the biased flow state to the 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 filling amount of the refrigerant, so that the evaporator is restored from the biased flow state to the non-biased flow state; a third control submodule, used to control the air conditioner to perform an airflow guide 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 is restored from the biased flow state to the non-biased flow state.

[0020] Optionally, the air conditioner control device for preventing bias flow also includes: a third control unit, for controlling the air conditioner to operate in a first current operating state when the operating mode of the air conditioner is not a 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 the cooling mode; a fourth control unit, for controlling the air conditioner to operate in 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; a fifth control unit, for controlling the air conditioner to operate in 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 embodiments of the present invention, an air conditioner is provided. The air conditioner uses any of the above-mentioned air conditioner control methods for preventing bias flow.

[0022] According to another aspect of an embodiment of the present invention, a computer-readable storage medium is further provided, wherein the computer-readable storage medium includes a stored program, wherein the program executes any one of the above-mentioned air conditioner control methods for preventing bias flow.

[0023] According to another aspect of an embodiment of the present invention, a processor is further provided, the processor being used to run a program, wherein the program, when running, executes any one of the above-mentioned air conditioner control methods for preventing bias flow.

[0024] According to another aspect of an embodiment of the present invention, a computer program product is further provided, comprising computer instructions, wherein when the computer instructions are executed by a processor, any one of the above-mentioned air conditioner control methods for preventing bias flow is executed.

[0025] In an embodiment of the present invention, an acquisition step is to acquire the pipe temperature change rate of the pipe temperature and the ambient temperature change rate of the ambient temperature in the current time period when the ambient temperature in the target room where the air conditioner is located reaches a predetermined temperature, 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; a determination step is to determine that the evaporator is in a bias flow 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 a threshold for judging the pipe temperature change rate when judging whether the evaporator is in a bias flow state, and the second rate threshold is a threshold for judging the ambient temperature change rate when judging whether the evaporator is in a bias flow state, and the bias flow state refers to a state in which the refrigerant is unevenly distributed in the pipe of the evaporator; a control step is to control the electronic expansion valve to increase the predetermined opening degree based on the current opening degree when determining that the evaporator is in a bias flow state; and the acquisition step, the determination step and the control step are sequentially repeated at least once until the current opening degree of the electronic expansion valve reaches the opening degree threshold, or until the air conditioner switches state, wherein the state switching refers to a change in the operating parameters of the air conditioner. Through the above technical scheme, the purpose of determining whether the evaporator is in a bias flow state is achieved by monitoring the change rate of the pipe temperature in the evaporator of the air conditioner and the change rate of the ambient temperature. When it is determined that the evaporator is in a bias flow state, the bias flow of the evaporator is suppressed by adjusting the opening of the electronic expansion valve to restore it to normal. The technical effect of avoiding the deterioration of the cooling effect of the air conditioner due to the bias flow of the evaporator by monitoring the bias flow of the evaporator and adjusting it is achieved, thereby improving the user experience and further solving the technical problem in the related art that the cooling effect of the air conditioner is deteriorated due to the bias flow of the evaporator, which easily causes serious power consumption and affects the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0027] Figure 1 It is a hardware structure block diagram of a mobile terminal of an air conditioner control method for preventing bias flow according to an embodiment of the present invention;

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

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

[0030] Figure 4 is a flow chart of another optional air conditioner control method for preventing bias flow according to an embodiment of the present invention;

[0031] Figure 5 2 is a schematic diagram of an air conditioner control device for preventing bias flow according to an embodiment of the present invention. DETAILED DESCRIPTION

[0032] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work 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 and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0034] As introduced in the background technology, in the related art, the cooling effect of the air conditioner is deteriorated due to the bias flow of the evaporator, which easily causes serious power consumption and affects the user experience. In view of the above defects, an air conditioner control method and device, an evaporator, and an air conditioner for preventing bias flow are provided in the embodiments of the present invention.

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

[0036] The method embodiments provided in the embodiments of the present invention can be executed in a mobile terminal, a computer terminal or a similar computing device. Taking running on a mobile terminal as an example, Figure 1 FIG. 1 is a hardware structure block diagram of a mobile terminal of an air conditioner control method for preventing bias flow according to an embodiment of the present invention. Figure 1 As shown, the mobile terminal may include one or more ( Figure 1 Only one is shown in the figure) a processor 102 (the processor 102 may include but is not limited to a processing device such as a microprocessor MCU or a programmable logic device FPGA) and a memory 104 for storing data, wherein the mobile terminal may also include a transmission device 106 and an input / output device 108 for communication functions. It can be understood by those skilled in the art that Figure 1 The structure shown is for illustration only and does not limit the structure of the mobile terminal. Figure 1 More or fewer components as shown, or with Figure 1 Different configurations are shown.

[0037] The memory 104 can be used to store computer programs, for example, software programs and modules of application software, such as the computer program corresponding to the air conditioner control method for preventing bias flow in the embodiment of the present invention. The processor 102 executes various functional applications and data processing by running the computer program stored in the memory 104, that is, the above method is implemented. The memory 104 may include a high-speed random access memory, and may also include a non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some examples, the memory 104 may further include a memory remotely arranged relative to the processor 102, and these remote memories can be connected to the mobile terminal via a network. Examples of the above-mentioned network include but are not limited to the Internet, an intranet, a local area network, a mobile communication network, and a combination thereof. The transmission device 106 is used to receive or send data via a network. The above-mentioned specific examples of the network may include a wireless network provided by a communication provider of the mobile terminal. In one example, the transmission device 106 includes a network adapter (Network Interface Controller, referred to as NIC), which can be connected to other network devices through a base station so as 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 of an air conditioner control method for preventing bias flow is provided. It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer executable instructions, and although a logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in an order different from that shown here.

[0039] Figure 2 FIG. 4 is a flow chart of an air conditioner control method for preventing bias flow according to an embodiment of the present invention. Figure 2 As shown, the method comprises the following steps:

[0040] Step S202, an acquisition step, when the ambient temperature in the target room where the air conditioner is located reaches a predetermined temperature, acquires the pipe temperature change rate of the pipe temperature and the ring temperature change rate of the ambient temperature in 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.

[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 pipe temperature change rate (i.e., the pipe temperature change rate) and the ambient temperature change rate (i.e., the ambient temperature change rate) of the pipes in the evaporator of the air conditioner can be monitored in real time, and 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 a bias flow phenomenon has occurred (i.e., whether it is in a bias flow state); the temperature change rate of the pipe temperature and the ambient temperature change rate of the ambient temperature here refer to the ratio of the difference between the temperature (including the pipe temperature and the ambient temperature) at a certain moment in the operation of the air conditioner after the ambient temperature reaches the predetermined temperature and the temperature after a predetermined time to the predetermined time. For example, the difference between the pipe temperature and the ambient temperature at a certain moment and the pipe temperature and the ambient temperature 1s later can be used as the pipe temperature change rate and the ambient temperature change rate within the current time period (here taking 1s as an example).

[0042] According to the above embodiment of the present invention, in the above step S202, when the ambient temperature in the target room where the air conditioner is located reaches a predetermined temperature, the pipe temperature change rate of the pipe temperature and the ambient temperature change rate of the ambient temperature in 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 a cooling mode, the ambient temperature in the target room is obtained according to a predetermined period; when the ambient temperature reaches a predetermined temperature, the air conditioner is controlled to operate at a predetermined frequency, wherein the predetermined frequency is lower than a frequency threshold; while the air conditioner is operating at the predetermined frequency, the pipe temperature change rate and the ambient temperature change rate in the current time period are obtained.

[0043] Combine the following Figure 3 and Figure 4 The above embodiments of the present invention are described in detail. Figure 3 is a flow chart of an optional air conditioner control method for preventing bias flow according to an embodiment of the present invention, Figure 4 is a flow chart of another optional air conditioner control method for preventing bias flow according to an embodiment of the present invention.

[0044] As above Figure 3 And on 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 monitoring that the ambient temperature reaches the temperature preset by the user or the system, the air conditioner is controlled to run at a low frequency, and in the process, the pipe temperature change rate and the ambient temperature change rate within the current time period are obtained in real time.

[0045] Step S204, a determination step, determines that the evaporator is in a bias flow state when the tube 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 a threshold for judging the tube temperature change rate when judging whether the evaporator is in a bias flow state, and the second rate threshold is a threshold for judging the ambient temperature change rate when judging whether the evaporator is in a bias flow state, and the bias flow state refers to a state in which the refrigerant is unevenly distributed in the pipes of the evaporator.

[0046] In this embodiment, as above Figure 3 As shown, the tube temperature change rate can be compared with the first rate threshold, and the ambient temperature change rate can be compared with the second rate threshold, so as to determine whether the evaporator has a flow deviation phenomenon based on the comparison result; here, the tube temperature change rate can be compared with the first rate threshold first, if the tube temperature change rate is not greater than the first rate threshold, it is considered that the current evaporator has no flow deviation phenomenon, if the tube temperature change rate is greater than the first rate threshold, then the size of the ambient temperature change rate and the second rate threshold is further determined; if the ambient temperature change rate is not less than the second rate threshold on the basis that the tube temperature change rate is greater than the first rate threshold, it is considered that the current evaporator still has no flow deviation phenomenon, if the ambient temperature change rate is less than the second rate threshold on the basis that the tube temperature change rate is greater than the first rate threshold, then it is considered that the current evaporator has a flow deviation phenomenon.

[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 Refers to the pipe temperature at a certain time t during the low-frequency operation of the air conditioner, T 内管2 Refers to the pipe temperature 1 second after the time t, S 预设1Refers to the first rate threshold. The tube temperature change rate in this 1s is S1, and it is considered that there is no flow deviation in the current evaporator. Assuming T 内管1 -T 内管2 ) / 1s>S 预设1 , then further calculate the ambient temperature T at time t 内环1 The ambient temperature T 1 second after the time t 内环2 The difference between (i.e. the ambient temperature change rate S2 within 1s) and the second rate threshold S 预设2 For comparison, 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 , it is considered that the evaporator still has no bias flow phenomenon. 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 , it is considered that the evaporator has a bias flow 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 tube temperature (i.e., the temperature of the refrigerant in the evaporator) to change at an expected rate. If the tube temperature change rate S1 exceeds the first rate threshold S 预设1 , which may mean that the evaporation rate of the refrigerant in a certain part is abnormally fast, which may be caused by excessive refrigerant flow or excessive cold absorption in this part; and the rate of change of the 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 ambient temperature change rate S2 is lower than the second rate threshold S 预设2 , which may mean that the overall cooling efficiency of the evaporator is low, that is, the speed of the ambient temperature drop does not reach the expected speed. This is usually caused by the uneven distribution of refrigerant in the evaporator. Excessive refrigerant in some areas leads to excessive local cooling, while insufficient refrigerant in other areas leads to poor overall heat exchange efficiency. Combining these two conditions, when S1>S 预设1 , which means that the refrigerant in a certain part of the pipeline absorbs heat abnormally, which may be local overcooling; and S2 预设2 , it means that the overall cooling effect of the evaporator is not good. In this case, it usually means that the distribution of the refrigerant in the evaporator is seriously uneven, that is, the deviation phenomenon occurs, resulting in a decrease in the operating efficiency of the evaporator.

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

[0050] In this embodiment, as above Figure 3 As shown, when the evaporator has a bias flow phenomenon, that is, the evaporator is in a bias flow state, the opening of the electronic expansion valve can be corrected to adjust the flow rate of the refrigerant, thereby reducing the bias flow phenomenon of the evaporator.

[0051] According to the above embodiment of the present invention, in the above step S206, when it is determined that the evaporator is in a bias flow state, the electronic expansion valve is controlled to increase the predetermined opening on the basis of the current opening, including: when it is determined that the evaporator is in a bias flow state, obtaining the current opening of the electronic expansion valve; when the current opening does not reach the opening threshold, controlling the electronic expansion valve to increase the predetermined opening on the basis of the current opening.

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

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

[0054] In this embodiment, the above steps can be repeated in sequence until the current opening of the electronic expansion valve reaches the opening threshold or the air conditioner switches state, then the above monitoring of whether the evaporator has a bias flow can be stopped, and when a bias flow occurs, the opening of the electronic expansion valve can be corrected to reduce the evaporator bias flow.

[0055] It should be noted that the correction of the opening of the electronic expansion valve and the judgment of whether its current opening has reached the opening threshold is actually a dynamic process. Figure 4 As shown, it can also be used in 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 the case where it is considered that the current evaporator has a bias flow phenomenon and the opening of the electronic expansion valve needs to be adjusted, the opening of the electronic expansion valve can be increased according to a predetermined step frequency (such as 1P / 5s, that is, increasing 1P every 5s). In this process, it can be determined in real time whether the opening of the electronic expansion valve has reached the opening threshold. If in this process the opening of the electronic expansion valve has reached the opening threshold, or the air conditioner has a state switch (including but not limited to changes in operating mode, wind speed, frequency, etc.) or shuts down, the process of increasing the opening of the electronic expansion valve according to the predetermined step frequency (such as 1P / 5s, that is, increasing 1P every 5s) can be stopped.

[0056] According to the above embodiment of the present invention, the air conditioner control method for preventing bias flow also includes: when the current opening of the electronic expansion valve reaches an opening threshold, controlling the air conditioner to operate according to the current state; when the air conditioner operates in the current state for a preset time, executing 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 bias flow state; when it is determined that the evaporator is still in the bias flow state, detecting whether the current opening of the electronic expansion valve has changed to obtain a detection result; and according to the detection result, controlling the electronic expansion valve or the air conditioner to perform an adjustment operation to restore the evaporator from the bias flow state to the non-bias flow state, wherein the non-bias flow state refers to a state in which the refrigerant is evenly distributed in the pipes of the evaporator.

[0057] As above Figure 3 And on Figure 4 As shown, when the opening of the electronic expansion valve reaches the opening threshold value of 60P, the air conditioner can be controlled to run according to the current state for 30 minutes (i.e., the preset duration, 30 minutes is taken as an example here), and then the current pipe temperature change rate and the ambient temperature change rate are re-acquired, and it is determined whether the current evaporator still has a bias flow phenomenon; since the opening of the electronic expansion valve will automatically adjust as the air conditioner operating conditions change during the operation of the air conditioner, it is possible to first determine whether the opening of the electronic expansion valve has changed after the air conditioner has run for 30 minutes according to the current state, and then control the electronic expansion valve or the air conditioner to perform corresponding adjustment operations based on the judgment result (i.e., the above-mentioned detection result) to reduce the bias flow phenomenon of the evaporator and restore it to a non-bias flow state.

[0058] In the above embodiment of the present invention, an adjustment operation is performed on the air conditioner according to the detection result to restore the evaporator from the bias flow state to the non-bias flow state, including: when the detection result indicates that the current opening has changed and the current opening after the change is still less than the opening threshold, the electronic expansion valve is controlled to increase the predetermined opening on the basis of the current opening to restore the evaporator from the bias flow state to the non-bias flow state; when the detection result indicates that the current opening has not changed, or the detection result indicates that the current opening has changed and the current opening after the change is greater than the opening threshold, the air conditioner is controlled to perform an adjustment operation to restore the evaporator from the bias flow state to the non-bias flow state.

[0059] Specifically, if the opening of the electronic expansion valve changes after the air conditioner has been running in the current state for 30 minutes, and the opening of the electronic expansion valve after the change is still less than the opening threshold, the opening of the electronic expansion valve can be adjusted according to the above-mentioned method of controlling the electronic expansion valve to increase the opening so as to weaken the bias flow phenomenon of the evaporator and restore it to a non-bias flow state; if the opening of the electronic expansion valve does not change after the air conditioner has been running in the current state for 30 minutes, or the opening of the electronic expansion valve changes, and the opening of the electronic expansion valve after the change is still greater than the opening threshold, it can be considered that other problems have occurred in the air conditioner that caused the evaporator bias flow phenomenon, and the air conditioner can be controlled to take other measures to make corresponding adjustments so that the evaporator can be restored from the bias flow state to the non-bias flow state.

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

[0061] Specifically, the following measures can be taken to alleviate the bias phenomenon of the evaporator so that the evaporator can be restored from a bias state to a non-bias state; specifically as follows: 1) Optimize airflow distribution: Check and adjust the air duct design or airflow guiding components inside the air conditioner, such as wind wings, air guide plates, etc., to ensure that the cold air generated during the evaporation of the refrigerant can be evenly distributed on the entire evaporator surface, thereby preventing local overcooling; 2) Enhance the thermal distribution of the evaporator: Make improvements to the evaporator design, such as increasing the number of fins or changing the shape of the fins to improve the heat exchange efficiency and make the refrigerant evaporate more evenly. In addition, consider adding microchannels in specific areas of the evaporator to improve the flow characteristics of the refrigerant; 3) Introduce auxiliary control strategies: In addition to the control of the electronic expansion valve, other auxiliary control strategies can also be introduced, such as the optimization of the temperature sensor network. By increasing the number and distribution of temperature sensors, more accurate Monitor the temperature of each part of the evaporator to provide more abundant data support for the control system so that more precise control measures can be taken; 4) Adjust the type or charge of refrigerant: Consider whether the deviation is caused by the type or charge of refrigerant being unsuitable for the current operating environment and system design. Proper adjustment of the type or charge of refrigerant may improve the working condition of the evaporator and avoid deviation; 5) System self-cleaning: If the deviation is caused by dirt and blockage inside the air-conditioning system, consider introducing self-cleaning functions such as backwashing and purging to remove impurities in the system and improve the fluidity of the refrigerant; 6) User interaction prompts: Consider adding user interaction functions to prompt users of the current operating status through the display screen or mobile phone APP, and suggest taking some measures, such as adjusting the indoor humidity, checking whether the air filter is blocked, etc., to help solve the deviation problem from the external environment and usage habits.

[0062] In an optional embodiment of the present invention, the air conditioner control method for preventing bias flow also includes: when the operating mode of the air conditioner is not a 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 operates in an operating mode other than the 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.

[0063] Specifically, as above Figure 4As shown, when it is detected that the operating mode of the air conditioner is not a cooling mode, when it is detected that the pipe temperature change rate is not greater than the first rate threshold, when it is detected that 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, etc., the air conditioner can be controlled to operate normally, that is, the air conditioner can be controlled to operate according to its current operating state. This is because when the air conditioner is operating in a non-cooling mode, no anti-bias flow protection is involved, and when 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, the evaporator does not have a bias flow phenomenon, and there is no need for anti-bias flow protection, so 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 embodiment of the present invention, the pipe temperature change rate of the pipe temperature and the ambient temperature change rate of the ambient temperature in the current time period can be obtained through the acquisition step when the ambient temperature in the target room where the air conditioner is located reaches a predetermined temperature, 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 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, determines that the evaporator is in a bias flow state, wherein the first rate threshold is a threshold for judging the pipe temperature change rate when judging whether the evaporator is in a bias flow state, and the second rate threshold is a threshold for judging the ambient temperature change rate when judging whether the evaporator is in a bias flow state, and the bias flow state refers to a state in which the refrigerant is unevenly distributed in the pipes of the evaporator. ; control step, when it is determined that the evaporator is in a bias state, control the electronic expansion valve to increase a predetermined opening degree based on the current opening degree; repeat the acquisition step, the determination step and the control step in sequence at least once until the current opening degree of the electronic expansion valve reaches an opening threshold value, or until the air conditioner switches state, wherein the state switching refers to a change in the operating parameters of the air conditioner, thereby achieving the purpose of determining whether the evaporator is in a bias state by monitoring the rate of change of the pipe temperature in the evaporator of the air conditioner and the rate of change of the ambient temperature, and when it is determined that it is in a bias state, suppressing the bias flow of the evaporator by adjusting the opening degree of the electronic expansion valve to restore it to normal, achieving the technical effect of avoiding the deterioration of the cooling effect of the air conditioner due to the bias flow of the evaporator by monitoring the bias flow of the evaporator and adjusting it, thereby improving the user experience.

[0065] Therefore, the technical solution provided by the above-mentioned embodiment of the present invention solves the technical problem in the related art that the cooling effect of the air conditioner is deteriorated due to the deviation of the evaporator, which easily causes serious power consumption and affects the user experience.

[0066] It should be noted that, for the aforementioned method embodiments, for the sake of simplicity, they are all expressed as a series of action combinations, but those skilled in the art should be aware that the present application is not limited by the described order of actions, because according to the present application, certain steps can be performed in other orders or simultaneously. Secondly, those skilled in the art should also be aware that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the present application.

[0067] Through the description of the above implementation methods, those skilled in the art can clearly understand that the method according to the above embodiment can be implemented by means of software plus a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk), and includes a number of instructions for a terminal device (which can be a mobile phone, computer, server, or network device, etc.) to execute the methods described in each embodiment of the present application.

[0068] According to an embodiment of the present invention, there is also provided an air conditioner control device for preventing bias flow for implementing the air conditioner control method for preventing bias flow. Figure 5 is a schematic diagram of an air conditioner control device for preventing bias flow according to an embodiment of the present invention. 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 air conditioner control device for preventing bias flow is described in detail below.

[0069] The first acquisition unit 51 is used to execute the acquisition step, and when the ambient temperature in the target room where the air conditioner is located reaches a predetermined temperature, obtains the pipe temperature change rate of the pipe temperature and the ring temperature change rate of the ambient temperature in 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.

[0070] The first determination unit 53 is used to execute the determination step, and determines that the evaporator is in a bias flow state when the tube temperature change rate is greater than the first rate threshold and the ambient temperature change rate is less than the second rate threshold, wherein the first rate threshold is a threshold for judging the tube temperature change rate when judging whether the evaporator is in a bias flow state, and the second rate threshold is a threshold for judging the ambient temperature change rate when judging whether the evaporator is in a bias flow state. The bias flow state refers to a state in which the refrigerant is unevenly distributed in the pipes of the evaporator.

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

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

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

[0074] As can be seen from the above, in the scheme recorded in the above-mentioned embodiment of the present invention, the first acquisition unit can be used to perform the acquisition step, and when the ambient temperature in the target room where the air conditioner is located reaches a predetermined temperature, the pipe temperature change rate of the pipe temperature and the ambient temperature change rate of the ambient temperature in the current time period are obtained, 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; then the first determination unit is used to perform the determination step, and 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 bias flow state, wherein the first rate threshold is a threshold for judging the pipe temperature change rate when judging whether the evaporator is in a bias flow state, and the second rate threshold is a threshold for judging the ambient temperature change rate when judging whether the evaporator is in a bias flow state, and the bias flow state refers to a state in which the refrigerant is unevenly distributed in the pipe of the evaporator; then Then, the control step is executed by using the first control unit, and when it is determined that the evaporator is in a bias flow state, the electronic expansion valve is controlled to increase a predetermined opening degree based on the current opening degree; finally, the acquisition step, the determination step and the control step are repeatedly executed in sequence by using the execution unit at least once, until the current opening degree of the electronic expansion valve reaches the opening degree threshold, or until the air conditioner switches state, wherein the state switching refers to a change in the operating parameters of the air conditioner, thereby achieving the purpose of determining whether the evaporator is in a bias flow state by monitoring the rate of change of the pipe temperature in the evaporator of the air conditioner and the rate of change of the ambient temperature, and when it is determined that it is in a bias flow state, suppressing the bias flow of the evaporator by adjusting the opening degree of the electronic expansion valve to restore it to normal, achieving the technical effect of avoiding the deterioration of the cooling effect of the air conditioner due to the bias flow of the evaporator by monitoring the bias flow of the evaporator and adjusting it, thereby improving the user experience.

[0075] Therefore, the technical solution provided by the above-mentioned embodiment of the present invention solves the technical problem in the related art that the cooling effect of the air conditioner is deteriorated due to the deviation of the evaporator, which easily causes serious power consumption and affects the user experience.

[0076] Optionally, the first acquisition unit includes: a first acquisition module, used to acquire the operating mode of the air conditioner after the air conditioner is started; a second acquisition module, used to acquire the ambient temperature in the target room according to a predetermined period when the operating mode is a 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; a third acquisition module, used to acquire the pipe temperature change rate and the ambient temperature change rate within a current time period when the air conditioner is operating at a predetermined frequency.

[0077] Optionally, the first control unit includes: a fourth acquisition module, used to obtain the current opening 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 a predetermined opening based on the current opening when the current opening does not reach an opening threshold.

[0078] Optionally, the air conditioner control device for preventing bias flow also includes: a second control unit, which is used to control the air conditioner to operate in the current state when the current opening of the electronic expansion valve reaches an opening threshold; a second acquisition unit, which is used to execute an acquisition step to obtain the current pipe temperature change rate and the ambient temperature change rate when the air conditioner has been operating in the current state for a preset time; a second determination unit, which is used to determine that the evaporator is still in the bias flow 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, which is used to detect whether the current opening of the electronic expansion valve has changed and obtain a detection result when it is determined that the evaporator is still in the bias flow state; and an adjustment unit, which is 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 bias flow state to the non-bias flow state, wherein the non-bias flow state refers to a state in which the refrigerant is evenly distributed in the pipes of the evaporator.

[0079] Optionally, the adjustment unit comprises: a first adjustment module, for controlling the electronic expansion valve to increase a predetermined opening degree based on the current opening degree when the detection result indicates that the current opening degree has changed and the current opening degree after the change 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 to restore the evaporator from a biased flow state to a non-biased flow state when the detection result indicates that the current opening has not changed, or when the detection result indicates that the current opening has changed and the changed current opening is greater than an opening threshold.

[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, so that the fluidity of the refrigerant is higher than the fluidity threshold, so that the evaporator is restored 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 filling amount of the refrigerant, so that the evaporator is restored from a biased flow state to a non-biased flow state; a third control submodule, used to control the air conditioner to perform an airflow guide 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 is restored from a biased flow state to a non-biased flow state.

[0082] Optionally, the air conditioner control device for preventing bias flow also includes: a third control unit, used for controlling the air conditioner to operate in a first current operating state when the operating mode of the air conditioner is not a 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 the cooling mode; a fourth control unit, used for controlling the air conditioner to operate in 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; a fifth control unit, used for controlling the air conditioner to operate in 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 embodiments of the present invention, an evaporator is further provided. The evaporator uses any one of the above-mentioned air conditioner control methods for preventing bias flow.

[0084] According to another aspect of an embodiment of the present invention, an air conditioner is provided. The air conditioner uses any of the above-mentioned air conditioner control methods for preventing bias flow.

[0085] According to another aspect of an embodiment of the present invention, a computer-readable storage medium is further provided, the computer-readable storage medium comprising a stored program, wherein the program executes any one of the above-mentioned air conditioner control methods for preventing bias flow.

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

[0087] Optionally, in this embodiment, the computer-readable storage medium is configured to store program codes for executing the following steps: an acquisition step, in which, when the ambient temperature in the target room where the air conditioner is located reaches a predetermined temperature, the pipe temperature change rate of the pipe temperature and the ambient temperature change rate of the ambient temperature in the current time period are acquired, 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; a determination step, in which, 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 biased flow state, wherein the first rate threshold is used to determine whether the evaporator is in a biased flow state. A threshold for judging the rate of change of the pipe temperature when the evaporator is in a bias flow state, a second rate threshold is a threshold for judging the rate of change of the ambient temperature when the evaporator is in a bias flow state, the bias flow state refers to the state of uneven distribution of refrigerant in the pipe of the evaporator; a control step, when it is determined that the evaporator is in a bias flow state, controlling the electronic expansion valve to increase a predetermined opening on the basis of the current opening; repeating the acquisition step, the determination step and the control step at least once in sequence until the current opening of the electronic expansion valve reaches the opening threshold, or until the air conditioner switches state, wherein the state switching refers to changes in the operating parameters of the air conditioner.

[0088] Optionally, in this embodiment, the computer-readable storage medium is configured to store program codes for executing the following steps: after the air conditioner is started, obtaining the operating mode of the air conditioner; when the operating mode is a 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; while the air conditioner is operating at the predetermined frequency, obtaining the pipe temperature change rate and the ambient temperature change rate within the current time period.

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

[0090] Optionally, in this embodiment, the computer-readable storage medium is configured to store program codes for executing the following steps: when the current opening of the electronic expansion valve reaches an opening threshold, controlling the air conditioner to operate in the current state; when the air conditioner has been operating in the current state for a preset time, executing an 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 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 bias flow state; when it is determined that the evaporator is still in a bias flow state, detecting whether the current opening of the electronic expansion valve has changed to obtain a detection result; and according to the detection result, controlling the electronic expansion valve or the air conditioner to perform an adjustment operation to restore the evaporator from a bias flow state to a non-bias flow state, wherein the non-bias flow state refers to a 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 codes for executing the following steps: when the detection result indicates that the current opening has changed and the current opening after the change is still less than the opening threshold, the electronic expansion valve is controlled to increase the predetermined opening based on the current opening to restore the evaporator from the bias flow state to the non-bias flow state; when the detection result indicates that the current opening has not changed, or the detection result indicates that the current opening has changed and the current opening after the change is greater than the opening threshold, the air conditioner is controlled to perform an adjustment operation to restore the evaporator from the bias flow state to the non-bias flow state.

[0092] Optionally, in this embodiment, the computer-readable storage medium is configured to store program codes for executing the following steps: controlling the air conditioner to perform a self-cleaning operation so that the fluidity of the refrigerant is higher than a fluidity threshold value, so that the evaporator is restored from a bias flow state to a non-bias flow state; controlling the air conditioner to perform a refrigerant adjustment operation, adaptively adjusting the type and filling amount of the refrigerant, so that the evaporator is restored from a bias flow state to a non-bias flow state; controlling the air conditioner to perform an airflow guide 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 is restored from a bias flow state to a non-bias flow state.

[0093] Optionally, in this embodiment, the computer-readable storage medium is configured to store program codes for executing the following steps: when the operating mode of the air conditioner is not the cooling mode, controlling the air conditioner to operate in a first current operating state, wherein the first current operating state is the operating state of the air conditioner when it operates in an operating mode other than the cooling mode; when the pipe temperature change rate is not greater than a first rate threshold, controlling the air conditioner to operate in 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 in 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 an embodiment of the present invention, a processor is further provided, and the processor is used to run a program, wherein when the program is run, any one of the above-mentioned air conditioner control methods for preventing bias flow is executed.

[0095] According to another aspect of an embodiment of the present invention, a computer program product is further provided, comprising computer instructions, and when the computer instructions are executed by a processor, any one of the above-mentioned air conditioner control methods for preventing bias flow is executed.

[0096] The serial numbers of the above embodiments of the present invention are only for description and do not represent the advantages or disadvantages of the embodiments.

[0097] In the above embodiments of the present invention, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made 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. Among them, the device embodiments described above are only schematic. For example, the division of the units can be a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of units or modules, which can be electrical or other forms.

[0099] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple units. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0100] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0101] If the integrated unit is implemented in the form of 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, and the computer software product is stored in a storage medium, including a number of instructions for a computer device (which can be a personal computer, a server or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), mobile hard disk, magnetic disk or optical disk and other media that can store program codes.

[0102] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. An air conditioner control method for preventing bias flow, characterized in that: include: an acquisition step, in which, when the ambient temperature in the target room where the air conditioner is located reaches a predetermined temperature, a pipe temperature change rate of the pipe temperature and a ring temperature change rate of the ambient temperature in a current time period are acquired, 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; A determination step, in which, when the tube 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 biased flow state, wherein the first rate threshold is a threshold for determining the tube temperature change rate when determining whether the evaporator is in the biased flow state, and the second rate threshold is a threshold for determining the ambient temperature change rate when determining whether the evaporator is in the biased flow state, and the biased flow state refers to a state in which the refrigerant in the pipe of the evaporator is unevenly distributed; A control step, when it is determined that the evaporator is in the biased flow state, controlling the electronic expansion valve to increase a predetermined opening degree based on a current opening degree; Repeat the acquisition step, the determination step and the control step at least once in sequence until the current opening of the electronic expansion valve reaches an opening threshold, or until the air conditioner switches state, wherein the state switch refers to a change in the operating parameters of the air conditioner.

2. The air conditioner control method for preventing bias flow 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 pipe temperature change rate of the pipe temperature and the ambient temperature change rate of the ambient temperature in the current time period are obtained, including: After the air conditioner is started, obtaining an operating mode of the air conditioner; When the operation mode is a 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; When the air conditioner is running at the predetermined frequency, the pipe temperature change rate and the ambient temperature change rate in the current time period are obtained.

3. The air conditioner control method for preventing bias flow 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 a predetermined opening degree based on a current opening degree includes: When it is determined that the evaporator is in the biased flow state, acquiring the current opening degree of the electronic expansion valve; When 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 bias flow according to claim 1, characterized in that: Also includes: When the current opening of the electronic expansion valve reaches the opening threshold, controlling the air conditioner to operate according to the current state; When the air conditioner has been running in the current state for a predetermined time, executing the acquisition step to obtain the current pipe temperature change rate and the ambient temperature change rate; When the current tube 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 biased flow state; In the case where it is determined that the evaporator is still in the biased flow state, detecting whether the current opening of the electronic expansion valve changes, and obtaining a detection result; According to the detection result, the electronic expansion valve or the air conditioner is controlled to perform an adjustment operation so that the evaporator is restored from the biased flow state to a non-biased flow state, wherein the non-biased flow state refers to a state in which the refrigerant in the pipeline of the evaporator is evenly distributed.

5. The air conditioner control method for preventing bias flow according to claim 4, characterized in that: Performing an adjustment operation on the air conditioner according to the detection result so as to restore the evaporator from the biased flow state to a 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 so that the evaporator is restored from the biased flow state to the non-biased flow state; When the detection result indicates that the current opening has not changed, or when the detection result indicates that the current opening has changed and the current opening after the change is greater than the opening threshold, the air conditioner is controlled to perform the adjustment operation so that the evaporator is restored from the biased flow state to the non-biased flow state.

6. The air conditioner control method for preventing bias flow according to claim 5, characterized in that: Controlling the air conditioner to perform the adjustment operation so that the evaporator is restored 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 so that the flowability of the refrigerant is higher than a flowability threshold value, so that the evaporator is restored from the biased flow state to the 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 is restored from the biased flow state to the non-biased flow state; The air conditioner is controlled to perform an airflow guide 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 is restored from the biased flow state to the non-biased flow state.

7. The air conditioner control method for preventing bias flow according to any one of claims 1 to 6, characterized in that: Also includes: When the operation mode of the air conditioner is not the cooling mode, controlling the air conditioner to operate according to a first current operation state, wherein the first current operation state is an operation state when the air conditioner operates in an operation mode other than the 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, the air conditioner is controlled 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.

8. An air conditioner control device for preventing bias flow, characterized in that: include: a first acquisition unit, configured to execute an acquisition step, and to acquire, when the ambient temperature in the target room where the air conditioner is located reaches a predetermined temperature, a pipe temperature change rate of the pipe temperature and a ring temperature change rate of the ambient temperature within a current time period, wherein the pipe temperature is a temperature of a pipe of an evaporator in the air conditioner, and the duration of the time period is a predetermined duration; A first determining unit is used to perform a determining step, and determine that the evaporator is in a biased flow state when the tube 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 a threshold for judging the tube temperature change rate when judging whether the evaporator is in the biased flow state, and the second rate threshold is a threshold for judging the ambient temperature change rate when judging whether the evaporator is in the biased flow state, and the biased flow state refers to a state in which the refrigerant in the pipe of the evaporator is unevenly distributed; A first control unit is used to execute a control step, and when it is determined that the evaporator is in the biased flow state, control the electronic expansion valve to increase a predetermined opening degree based on a current opening degree; An execution unit is used to repeatedly execute the acquisition step, the determination step and the control step in sequence at least once until the current opening of the electronic expansion valve reaches an opening threshold, or until the air conditioner switches state, 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 bias flow according to 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 bias flow according to 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 bias flow according to 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 bias flow as described in any one of claims 1 to 7 is performed.

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