CN113432254B

CN113432254B - Air conditioner blockage identification method and device, air conditioner and readable storage medium

Info

Publication number: CN113432254B
Application number: CN202110675343.8A
Authority: CN
Inventors: 周竞强; 冼志健
Original assignee: TCL Air Conditioner Zhongshan Co Ltd
Current assignee: TCL Air Conditioner Zhongshan Co Ltd
Priority date: 2021-06-18
Filing date: 2021-06-18
Publication date: 2022-11-15
Anticipated expiration: 2041-06-18
Also published as: CN113432254A

Abstract

The application provides an air conditioner blockage identification method and device, an air conditioner and a readable storage medium. The air conditioner blockage identification method comprises the following steps: acquiring the initial room temperature of an area where an air conditioner is located and the initial inner coil temperature of the air conditioner; judging whether the air conditioner is started for the first time or not according to the initial room temperature and the initial inner coil temperature; if the air conditioner is started for the first time, judging whether the air conditioner is blocked or not according to the current operation parameters of a compressor in the air conditioner; and if the air conditioner is blocked, outputting the prompt message of the air conditioner blockage. Therefore, the scheme in the application judges whether the air conditioner is blocked according to the current operation parameters by increasing the judgment of first starting and under the condition of first starting, so that the accuracy of blockage detection is improved.

Description

Air conditioner blockage identification method and device, air conditioner and readable storage medium

Technical Field

The application relates to the technical field of air conditioners, in particular to an air conditioner blockage identification method and device, an air conditioner and a readable storage medium.

Background

When the air conditioner is operated, internal blockage may be caused by human or external reasons. When a blockage occurs in the air conditioner, the flow of the refrigerant is affected, thereby affecting the stability of the air conditioner. The manual detection method brings extra workload to the user, and is not an ideal method.

The existing detection method judges whether an air conditioning system is blocked or not by detecting the operating frequency of a compressor and the operating current of an air conditioner, but the detection method is easy to cause misjudgment when other factors influence the operating frequency and the operating current.

Disclosure of Invention

The application provides an air conditioner blockage identification method and device, an air conditioner and a readable storage medium, and aims to solve the problem that misjudgment is easily caused by existing air conditioner blockage identification.

In a first aspect, the present application provides a method for identifying a blockage in an air conditioner, the method comprising:

acquiring the initial room temperature of an area where an air conditioner is located and the initial inner coil temperature of the air conditioner;

judging whether the air conditioner is started for the first time or not according to the initial room temperature and the initial inner coil temperature;

if the air conditioner is started for the first time, judging whether the air conditioner is blocked or not according to the current operation parameters of a compressor in the air conditioner;

and if the air conditioner is blocked, outputting the prompt message of the air conditioner blockage.

In a possible implementation manner of the embodiment of the present application, the determining whether the air conditioner is started up for the first time according to the initial room temperature and the initial temperature of the inner coil includes:

calculating a first temperature deviation value between the initial room temperature and the initial inner coil temperature;

comparing the first temperature deviation value with a first preset deviation threshold value;

and if the first temperature deviation value is smaller than or equal to the first preset deviation threshold value, judging that the air conditioner is started for the first time.

In a possible implementation manner of the embodiment of the application, if the temperature deviation value is less than or equal to the first preset deviation threshold, determining that the air conditioner is started for the first time includes:

if the first temperature deviation value is smaller than or equal to the first preset deviation threshold value, acquiring a plurality of operating frequencies of a compressor in the air conditioner and a plurality of bus voltages of the air conditioner within a first preset time period;

calculating the frequency change rate of the compressor according to the running frequency of each compressor, and calculating the bus voltage change rate according to the bus voltage of each air conditioner;

and if the frequency change rate is smaller than a first preset change rate and the bus voltage change rate is larger than a second preset change rate, judging that the air conditioner is started for the first time.

In a possible implementation manner of the embodiment of the present application, before outputting the indication information of the air conditioner blockage, the method further includes:

acquiring a target room temperature of an area where the air conditioner is located and a target inner coil temperature of the air conditioner after a preset time interval;

calculating a second temperature deviation value between the target room temperature and the target inner coil temperature;

comparing the second temperature deviation value with a second preset deviation threshold;

if the second temperature deviation value is smaller than or equal to the second preset deviation threshold value, acquiring the temperatures of the plurality of inner coils after the air conditioner is started;

extracting the temperature of the maximum inner coil from the temperatures of the plurality of inner coils according to the operation mode of the air conditioner;

judging whether the air conditioner is blocked or not according to the maximum inner coil temperature and the initial inner coil temperature;

and if the air conditioner is blocked, executing the step of outputting the prompt message of the air conditioner blockage.

In a possible implementation manner of the embodiment of the present application, determining whether the air conditioner is blocked according to the maximum inner coil temperature and the initial inner coil temperature includes:

if the air conditioner is in a heating mode, extracting the maximum inner coil temperature from the temperatures of the plurality of inner coils, calculating a temperature rise value between the maximum inner coil temperature and the initial inner coil temperature, and if the temperature rise value is less than or equal to a preset protection temperature difference, judging that the air conditioner is blocked;

if the air conditioner is in a refrigeration mode, extracting the minimum inner coil temperature from the plurality of inner coil temperatures, calculating a temperature drop value between the initial inner coil temperature and the minimum inner coil temperature, and if the temperature drop value is smaller than or equal to a preset protection temperature difference, judging that the air conditioner is blocked.

In a possible implementation manner of the embodiment of the present application, before the step of outputting the prompt message of the air conditioner blockage, the method further includes:

sampling the working current of the compressor for multiple times to obtain multiple sampling current values;

if the sampling current values are smaller than a first preset protection current value, controlling the compressor to stop;

after a second preset time interval, restarting the compressor, and judging whether the air conditioner is blocked again;

and if the air conditioner is blocked, executing the step of outputting the prompt message of the blockage.

In a possible implementation manner of the embodiment of the present application, the determining whether the air conditioner is blocked according to the current operation parameter of the compressor in the air conditioner includes:

and if the current operating frequency is greater than or equal to a first preset protection frequency and/or the current working current value is less than or equal to a second preset protection current value, judging that the air conditioner is blocked.

In a second aspect, the present application provides an air conditioner clogging recognition apparatus, the air conditioner clogging recognition including:

the system comprises an acquisition unit, a control unit and a control unit, wherein the acquisition unit is used for acquiring the initial room temperature of an area where an air conditioner is located and the initial temperature of an inner coil of the air conditioner;

the judging unit is used for judging whether the air conditioner is started for the first time or not according to the initial room temperature and the initial inner coil temperature;

the blockage judging unit is used for judging whether the air conditioner is blocked or not according to the current operation parameters of a compressor in the air conditioner if the air conditioner is started for the first time;

and the output unit is used for outputting the prompt information of the air conditioner blockage if the air conditioner is blocked.

In a possible implementation manner of the embodiment of the present application, the determining unit is further configured to:

In a possible implementation manner of the embodiment of the present application, the air conditioner blockage recognition apparatus further includes an extraction unit, and the extraction unit is configured to:

comparing the second temperature deviation value with a second preset deviation threshold value;

In a possible implementation manner of the embodiment of the present application, the extraction unit is further configured to:

if the air conditioner is in a heating mode, extracting the maximum inner coil temperature from the temperatures of the inner coils, calculating a temperature rise value between the maximum inner coil temperature and the initial inner coil temperature, and if the temperature rise value is smaller than or equal to a preset protection temperature difference, judging that the air conditioner is blocked;

In a possible implementation manner of the embodiment of the present application, the air conditioner blockage recognition apparatus further includes a sampling unit, and the sampling unit is configured to:

In a possible implementation manner of the embodiment of the present application, the current operation parameter includes a current operation frequency and a current operation current, and the blockage determining unit is further configured to:

In a third aspect, the present application further provides an air conditioner, where the air conditioner includes a processor and a memory, where the memory stores a computer program, and the processor executes any one of the steps in the method for identifying an air conditioner blockage provided in the present application when calling the computer program in the memory.

In a fourth aspect, the present application further provides a readable storage medium, on which a computer program is stored, the computer program being loaded by a processor to execute the steps of the air conditioner blockage identification method.

In summary, the method comprises the steps of obtaining an initial room temperature of an area where an air conditioner is located and an initial inner coil temperature of the air conditioner; judging whether the air conditioner is started for the first time or not according to the initial room temperature and the initial inner coil temperature; if the air conditioner is started for the first time, judging whether the air conditioner is blocked or not according to the current operation parameters of a compressor in the air conditioner; and if the air conditioner is blocked, outputting the prompt message of the air conditioner blockage. Therefore, the scheme in the application judges whether the air conditioner is blocked according to the current operation parameters by increasing the judgment of first starting and under the condition of first starting, so that the accuracy of blockage detection is improved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic view of an application scenario of an air conditioner blockage identification method according to an embodiment of the present application;

fig. 2 is a schematic flow chart of an air conditioner blockage identification method provided in an embodiment of the present application;

FIG. 3 is a schematic flow chart illustrating the determination of air conditioner blockage according to an embodiment of the present disclosure;

FIG. 4 is a schematic flow chart of the method for determining air conditioner clogging according to the sampled current value provided in the embodiment of the present application;

fig. 5 is a schematic structural diagram of an embodiment of an air conditioner blockage recognition device provided in an embodiment of the present application;

fig. 6 is a schematic structural diagram of an embodiment of an air conditioner provided in the embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only some embodiments of the present application, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

In the description of the embodiments of the present application, it should be understood that the terms "first", "second", and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the embodiments of the present application, "a plurality" means two or more unless specifically defined otherwise.

The following description is presented to enable any person skilled in the art to make and use the application. In the following description, details are set forth for the purpose of explanation. It will be apparent to one of ordinary skill in the art that the present application may be practiced without these specific details. In other instances, well-known processes have not been described in detail so as not to obscure the description of the embodiments of the present application with unnecessary detail. Thus, the present application is not intended to be limited to the embodiments shown, but is to be accorded the widest scope consistent with the principles and features disclosed in the embodiments of the present application.

First, before describing the embodiments of the present application, the related contents of the embodiments of the present application with respect to the application context will be described.

Nowadays, an air conditioner has been an indispensable electric appliance for each household. The operation of the air conditioner depends on the circulation flow of the refrigerant in the internal pipeline of the air conditioner, so that when the flow of the refrigerant is obstructed, i.e. the air conditioner is blocked, the normal operation of the air conditioner is greatly influenced.

After-sale installation personnel can forget to open the stop valve in the air conditioner after carrying out evacuation leak hunting operation when installing air conditioner for the first time, and this leads to the refrigerant can't pass through the stop valve when flowing, makes the air conditioner block up, and the long-time operation of compressor is a very dangerous thing under the condition that the stop valve is not opened, not only can shorten the life of compressor, more seriously has the risk of explosion. When a user starts the air conditioner for the first time, the air conditioner is directly started to operate in a cooling or heating mode, and few users have consciousness of abnormal refrigerant quantity detection, so that a method capable of accurately judging blockage of the air conditioner is urgently needed.

Based on the above defects of the prior art, the embodiments of the present application provide a method for identifying air conditioner blockage, which overcomes the defects of the prior art to at least some extent.

The embodiment of the application provides an air conditioner blockage identification method and device, an air conditioner and a readable storage medium. The air conditioner blockage recognition device can be integrated in an air conditioner, the air conditioner can adopt a working mode of independent operation or an equipment cluster, and for example, the air conditioner can be a multi-connected air conditioner.

The main body of the method for identifying the blockage of the air conditioner according to the embodiment of the present application may be the device for identifying the blockage of the air conditioner provided by the embodiment of the present application, or may be the air conditioner, and hereinafter, the air conditioner is taken as the main body of the air conditioner for example to explain, it should be noted that the air conditioner is taken as the main body of the air conditioner for example only for convenience of understanding, and the air conditioner is not taken as a limitation to the present application.

Referring to fig. 1, fig. 1 is a schematic view of a scene of an air conditioner blockage identification system according to an embodiment of the present application. The air conditioner blockage recognition system may include an air conditioner 100, and an air conditioner blockage recognition device is integrated in the air conditioner 100.

In addition, as shown in fig. 1, the air conditioner clogging recognition system may further include a memory 200 for storing data.

It should be noted that the scene schematic diagram of the air conditioner blockage identification system shown in fig. 1 is only an example, and the air conditioner blockage identification system and the scene described in the embodiment of the present application are for more clearly illustrating the technical solution of the embodiment of the present application, and do not form a limitation on the technical solution provided in the embodiment of the present application.

Referring to fig. 2, fig. 2 is a schematic flow chart of an air conditioner blockage identification method according to an embodiment of the present disclosure. It should be noted that, although a logical order is shown in the flow chart, in some cases, the steps shown or described may be performed in an order different than that shown or described herein. The air conditioner blockage identification method comprises the following steps of 201-204, wherein:

201. the method comprises the steps of obtaining the initial room temperature of an area where the air conditioner is located and the initial temperature of an inner coil of the air conditioner.

The initial room temperature may be a room temperature at which the air conditioner starts to operate. For example, the initial room temperature may be a room temperature detected by the air conditioner after the user turns on the air conditioner to select the operation mode. For example, after the air conditioner receives a power-on instruction sent by a user and determines that the operation mode is a cooling mode/heating mode according to the power-on instruction, the room temperature in a room can be detected through a temperature detection module arranged on an indoor unit to obtain an initial room temperature.

Similarly, the initial inner coil temperature may be the temperature of the inner coil at the time the air conditioner is started. For example, the initial inner coil temperature may be an inner coil temperature detected by an inner temperature detection module provided in the indoor unit while the air conditioner is detecting the initial room temperature.

202. And judging whether the air conditioner is started for the first time or not according to the initial room temperature and the initial inner coil temperature.

Wherein the first power on may refer to the first power on of the air conditioner after installation. The purpose of judging the first startup is to ensure that the judgment is accurate when the blockage is judged subsequently. If the air conditioner is started for the first time, all the components in the air conditioner are used for the first time, so that the operating parameters of the components during working can be different from the operating parameters after the components are used for multiple times. For example, for a compressor in a variable frequency air conditioner, the operating frequency of the compressor is not affected by the exhaust temperature, the temperature of an outer coil, the temperature of an inner coil and other factors when the compressor is started for the first time, but is not affected by the last operation because the air conditioner has been operated for a period of time before the compressor is started for the first time, and the operating frequency of the compressor is changed through the control logic of the variable frequency.

In some embodiments, the first power-on may also refer to the first power-on of the air conditioner for a period of time. For example, if the air conditioner is not started within 5 hours, and then the user turns on the air conditioner, the air conditioner is turned on for the first time. If the air conditioner has not been operated for a long time, the influence of the last operation on the operation is reduced to be ignored, for example, in a heating mode, if the temperature of the inner coil is influenced by the last operation, the temperature of the inner coil may be lower than the temperature of the inner coil detected when the air conditioner is started for the first time, and then the frequency fluctuation of the compressor is caused.

There are various methods for determining whether the boot is started for the first time. For example, whether the air conditioner is turned on for the first time may be determined according to a temperature difference between an initial room temperature and an initial inner coil temperature. When the air conditioner is started for the first time, the temperature inside the air conditioner is not affected by the last operation, so that the temperature in the inner coil pipe is basically consistent with the room temperature in a room or has a small difference, and if the absolute value of the temperature difference between the initial room temperature and the initial inner coil pipe temperature is smaller than a threshold value serving as a judgment reference, the air conditioner can be considered to be started for the first time. For convenience of understanding, a specific method for determining whether the air conditioner is turned on for the first time according to the initial room temperature and the initial temperature of the inner coil is provided in this embodiment, step 202 includes:

(1) Calculating a first temperature deviation value of the initial room temperature and the initial inner coil temperature.

(2) Comparing the first temperature deviation value with a first preset deviation threshold value.

(3) And if the first temperature deviation value is smaller than or equal to the first preset deviation threshold value, judging that the air conditioner is started for the first time.

The first temperature deviation value is an absolute value of a temperature difference between an initial room temperature and an initial inner coil temperature, and the first temperature deviation value can represent a temperature deviation between the inner temperature of the air conditioner and the room temperature. When the first temperature deviation value is large, which indicates that the deviation between the air conditioner internal temperature and the room temperature is large, the air conditioner may have been operated for a certain period of time or turned on once in a short time before being turned on, and thus the air conditioner internal temperature is affected. When the first temperature deviation value is small, the deviation between the internal temperature of the air conditioner and the room temperature is small, and the air conditioner is started for the first time.

In order to facilitate the air conditioner to determine the magnitude of the first temperature deviation value, a first preset deviation threshold serving as a determination reference may be preset in a storage space of the air conditioner or a networked cloud server, for example, the first preset deviation threshold may be 2 ℃. When the air conditioner is compared, the first temperature deviation value is larger than a first preset deviation threshold value, which shows that the first temperature deviation value is larger, and the air conditioner is judged not to be started for the first time. And when the first temperature deviation value is smaller than or equal to a first preset deviation threshold value, the first temperature deviation value is smaller, and the air conditioner is judged to be started for the first time.

In some embodiments, the air conditioner may further determine whether the current startup is the first startup by combining the operating frequency of the air conditioner and the bus voltage. In this case, the step (3) may specifically include:

(A) If the first temperature deviation value is smaller than or equal to the first preset deviation threshold value, acquiring a plurality of operating frequencies of a compressor in the air conditioner and a plurality of bus voltages of the air conditioner within a first preset time period.

When the first temperature deviation value is smaller than or equal to the first preset deviation threshold value, the air conditioner can also detect the operating frequency and the bus voltage of the air conditioner at a plurality of moments within a period of time, so as to further accurately judge whether the starting is the first starting or not according to the operating frequency and the bus voltage.

(B) And calculating the frequency change rate of the compressors according to the operating frequency of each compressor, and calculating the bus voltage change rate according to the bus voltage of each air conditioner.

Wherein, the frequency change rate refers to the change rate of the operating frequency of the compressor with time. For example, the frequency change rate may be a change rate obtained by averaging all target frequency change rates after calculating corresponding target frequency change rates according to every two operating frequencies. Assuming that the air conditioner obtains the operating frequencies of 0Hz (hereinafter abbreviated as Hz), 20Hz and 30Hz at three moments respectively, and the time intervals between adjacent moments are all 2 seconds (hereinafter abbreviated as s), the calculated 3 target frequency change rates are 10Hz/s,5Hz/s and 7.5Hz/s, so that the frequency change rate obtained after averaging is 7.5Hz/s.

The calculation method of the bus voltage change rate may refer to the calculation method of the frequency change rate, which is not described herein again.

The reason for calculating the bus voltage change rate and the frequency change rate is that the working performance of a compressor and a circuit is influenced after the air conditioner is not started for a long time. For the compressor, if the compressor is not started for a long time, the internal lubricating oil may slide into the bottom of the compressor, so that the compressor operates slowly when started for the first time, and the frequency change rate is low. After the air conditioner is not started for a long time, the voltage inside the air conditioner is possibly unstable when the air conditioner is powered on for the first time, so that the bus voltage has sudden change, and the calculated bus voltage change rate is high.

(C) And if the frequency change rate is smaller than a first preset change rate and the bus voltage change rate is larger than a second preset change rate, judging that the air conditioner is started for the first time.

In order to conveniently judge the frequency change rate and the bus voltage change rate, a first preset change rate and a second preset change rate can be preset in a memory or a cloud server of the air conditioner, the air conditioner judges the frequency change rate and the bus voltage change rate according to the relationship between the frequency change rate and the first preset change rate and the relationship between the bus voltage change rate and the second preset change rate respectively during judgment, and determines whether the air conditioner is started for the first time according to the frequency change rate and the bus voltage change rate.

Besides judging whether the air conditioner is started for the first time according to the initial room temperature and the initial inner coil temperature, the air conditioner with a part of memory functions can also directly read the historical running record of the compressor. And if the latest operation record shows that the time interval between the operation ending time and the current time is out of the preset range in the historical operation record, judging that the air conditioner is started for the first time. For example, the latest operation record shows that the time of the operation end is 100 of 6 months and 1 day, and the current time is 7 of 6 months and 1 day.

203. And if the air conditioner is started for the first time, judging whether the air conditioner is blocked or not according to the current operation parameters of a compressor in the air conditioner.

After the first startup is judged, the air conditioner can judge whether the air conditioner is blocked according to the current operation parameters of the compressor.

The current operating parameter of the compressor may include a current operating frequency and/or a current operating current of the compressor. Therefore, the air conditioner can judge whether the air conditioner is blocked according to the current running frequency and/or the current working current of the compressor. For example, the air conditioner may determine in the following manner: and if the current operating frequency is greater than or equal to the first preset protection frequency and/or the current working current value is less than or equal to the second preset protection current value, judging that the air conditioner is blocked.

Specifically, when the air conditioner is blocked, the cooling capacity or the heating capacity of the air conditioner is reduced, and the actual room temperature in the room cannot reach the set room temperature, so the air conditioner can continuously increase the operating frequency of the compressor, and the detected current operating frequency is higher, that is, greater than or equal to the preset first preset protection frequency. On the other hand, when the stop valve is closed to cause the air conditioner to be blocked, the compressor does no work, and the current working current value of the compressor detected by the air conditioner is smaller, namely smaller than or equal to the preset second preset protection current value.

It should be noted that, in order to ensure accuracy, the current operation parameters of the compressor may be detected after a preset time after the air conditioner is determined to be turned on for the first time, so as to avoid that the air conditioner does not enter a stable working state immediately after the air conditioner is turned on, and the detected current operation parameters are not representative. For example, when the air conditioner is blocked, although the air conditioner may continuously increase the operating frequency of the compressor, if the operating frequency is detected immediately after the air conditioner is determined to be turned on for the first time, the detected result may not be increased to be greater than or equal to the first preset protection frequency, which may result in an error in determination of the air conditioner. In addition, the sequence of detecting the current operating frequency and the current operating current value may be adjusted according to actual conditions, which is not limited in the embodiment of the present application.

Furthermore, the time interval from the start to the detection of the current working current value can be set according to the cycle period of refrigerant circulation. For example, a period of time may be added to the cycle period time, and then the added period of time may be used as the time interval. Assuming that the cycle time of the refrigerant cycle is 60s, 70s may be used as the time interval, that is, the air conditioner detects the current operating current value of the compressor at 70s after the air conditioner is turned on. The reason for this is that if the air conditioner is blocked, the compressor quickly draws the refrigerant in the pipeline when the air conditioner is started, so the compressor can do work to the refrigerant at the beginning stage, the working current value of the compressor can be in a fluctuation state which is increased firstly and then decreased to be stable, in order to avoid detecting the current value in the fluctuation state and judge the blocking condition according to the current value in the fluctuation state, and the current working current value can be detected after the refrigerant circulates for one period, namely the refrigerant is completely drawn by the compressor.

It should be noted that, the air conditioner may also detect the overall operating current value of the entire air conditioner, so as to replace the current operating current value of the compressor. At this time, different protection current values can be preset for the cooling mode and the heating mode respectively to judge the magnitude of the whole working current value. Specifically, when the air conditioner is in a heating mode, the four-way valve coil is energized and reversed, so that when other parameters are consistent, the overall working current value of the air conditioner is larger than that in a cooling mode, and therefore the protection current value corresponding to the heating mode needs to be set larger than that corresponding to the cooling mode. For example, when the protection current value corresponding to the cooling mode is set to 1A, the protection current value corresponding to the heating mode may be set to 2A.

It should be noted that, if the air conditioner determines that the start-up is not the first start-up, the determination method in step 203 may generate an error, so that other jam detection methods set in the air conditioner may be called.

204. And if the air conditioner is blocked, outputting the prompt message of the air conditioner blockage.

When the air conditioner determines that the jam occurs, the air conditioner may output a prompt message indicating the jam in order to remind a user or an after-sales serviceman. The prompt message may be a fault code for indicating congestion or an alarm prompt tone for indicating congestion, which is not limited in the embodiment of the present application.

Besides outputting the prompt message, the air conditioner can also control the compressor to stop, so that the damage caused by the idling of the compressor is avoided. In addition, the air conditioner can also control the outdoor fan to stop so as to reduce the electric quantity loss.

To sum up, the method comprises the steps of obtaining the initial room temperature of the area where the air conditioner is located and the initial temperature of an inner coil of the air conditioner; judging whether the air conditioner is started for the first time or not according to the initial room temperature and the initial inner coil temperature; if the air conditioner is started for the first time, judging whether the air conditioner is blocked or not according to the current operation parameters of a compressor in the air conditioner; and if the air conditioner is blocked, outputting the prompt message of the air conditioner blockage. Therefore, according to the scheme in the embodiment of the application, the judgment of the first startup is added, and whether the air conditioner is blocked or not is judged according to the current operation parameters under the condition of the first startup, so that the accuracy in blockage detection is improved.

In order to improve the judgment accuracy of the blockage, before the air conditioner outputs the prompt message, whether the air conditioner is blocked can be further judged according to the room temperature and the temperature of the inner coil. Referring to fig. 3, before outputting the indication that the air conditioner is blocked, the method further includes:

301. and acquiring the target room temperature of the area where the air conditioner is located and the target inner coil temperature of the air conditioner after a preset time interval.

The preset time interval may be determined according to the detection time of the current operation parameter. If the current operating parameter is detected immediately after startup, the preset time interval may be set longer. Illustratively, the preset time interval may also be determined according to a cycle period of the refrigerant cycle, and assuming that the cycle period is 60s, the preset time interval may be preset to 70s, so as to ensure that the air conditioner is in a stable operating state. If the air conditioner detects the current operation parameter after a certain time, for example, after a cycle period has elapsed, the preset time interval may be set to be shorter, for example, to 10s, or the target room temperature and the target inner coil temperature may be detected while detecting the current operation parameter.

302. And calculating a second temperature deviation value between the target room temperature and the target inner coil temperature.

The second temperature deviation value can represent the circulation condition of the refrigerant in the air conditioner, and when the refrigerant flows smoothly, the heat exchange condition of the indoor unit of the air conditioner is better, so that the temperature difference between the temperature of the inner coil pipe and the room temperature is large, and the second temperature deviation value is large. On the contrary, when the refrigerant flows unsmoothly, the heat exchange condition of the indoor unit of the air conditioner is poor, so the temperature difference between the temperature of the inner coil pipe and the room temperature is small, and the second temperature deviation value is small.

303. And comparing the second temperature deviation value with a second preset deviation threshold value.

304. And if the second temperature deviation value is smaller than or equal to the second preset deviation threshold value, acquiring the temperatures of the plurality of inner coils after the air conditioner is started.

In order to conveniently determine the size of the second temperature deviation value, a second preset deviation threshold serving as a comparison reference may be set in the storage space of the air conditioner or the cloud server, for example, the second preset deviation threshold may be set to 1 ℃. If the second temperature deviation value calculated by the air conditioner is smaller than or equal to a second preset deviation threshold value, the situation that the heat exchange condition of the indoor unit is poor, the refrigerant flows unsmoothly, and the air conditioner is likely to be blocked is indicated. In addition, the air conditioner can further judge whether the heat exchange condition of the indoor unit has a problem or not through the maximum variation amplitude of the temperature of the inner coil, and the accuracy of blockage detection is improved. At this time, the air conditioner needs to acquire the temperature of the internal coil after being started.

For example, the air conditioner may sample the temperature of the inner coil once every certain time since the air conditioner is turned on, and then record the sampling result in the storage space or the cloud server until the air conditioner performs step 304. When the air conditioner needs to obtain the temperature of the internal coil after the air conditioner is turned on, that is, step 304 is executed, the storage space may be queried to obtain the temperature of the internal coil recorded in the storage space. For example, the air conditioner may sample the temperature of the inner coil every 30s from the start-up, and assuming that the time for the air conditioner to perform step 304 is 2 minutes after the start-up, the temperature of the inner coil that the air conditioner can obtain is 4 inner coil temperatures in total.

305. And extracting the maximum temperature of the inner coil from the plurality of temperatures of the inner coil according to the operation mode of the air conditioner.

In order to obtain the maximum variation amplitude of the temperature of the inner coil, for different operation modes, different maximum values, namely the maximum inner coil temperature, reached by the temperature of the inner coil when the air conditioner operates stably need to be obtained. For the refrigeration mode, the refrigerant at the indoor unit is a low-temperature refrigerant, so that the temperature of the inner coil pipe can be reduced if the heat exchange condition of the indoor unit is good in the running process of the air conditioner, and the air conditioner needs to obtain the minimum value of the temperature of the inner coil pipe after starting up, namely the minimum temperature of the inner coil pipe, so that the maximum variation amplitude can be obtained in the subsequent steps. On the contrary, for the heating mode, the refrigerant at the indoor unit is a high-temperature refrigerant, so that if the heat exchange condition of the indoor unit is good during the operation of the air conditioner, the temperature of the inner coil pipe can rise, and the air conditioner needs to obtain the maximum value reached by the temperature of the inner coil pipe after being started, namely the maximum temperature of the inner coil pipe, so as to obtain the maximum variation amplitude in the subsequent steps.

306. Judging whether the air conditioner is blocked or not according to the maximum inner coil temperature and the initial inner coil temperature;

307. and if the air conditioner is blocked, executing the step of outputting the prompt message of the air conditioner blockage.

According to the maximum inner coil temperature and the initial inner coil temperature, the air conditioner can calculate the maximum variation amplitude of the inner coil temperature. For the cooling mode, the air conditioner may use the temperature drop values of the initial inner coil temperature and the minimum inner coil temperature as the maximum variation amplitude. For the heating mode, the air conditioner may use the maximum inner coil temperature and the temperature increase value of the initial inner coil temperature as the maximum variation amplitude. If the maximum variation amplitude is larger, the heat exchange condition of the indoor unit is good, and if the maximum variation amplitude is smaller, the heat exchange condition of the indoor unit is poor, and the air conditioner is possibly blocked.

In order to conveniently judge the temperature rise value or the temperature drop value, a preset protection temperature difference can be preset, and if the temperature rise value or the temperature drop value calculated by the air conditioner is smaller than or equal to the preset protection temperature difference, the air conditioner can be judged to be blocked, and a blocking prompt message is output.

In some embodiments, the air conditioner may also determine the blockage based on the maximum inside coil temperature and the initial inside coil temperature in other ways. For example, the manufacturer may preset a corresponding maximum temperature for each initial inner coil temperature in the cooling mode and the heating mode, respectively. The maximum temperature represents the maximum possible temperature of the inner coil in the cooling mode when the air conditioner is not blocked, or represents the minimum possible temperature of the inner coil in the heating mode when the air conditioner is not blocked. If the air conditioner detects that the temperature of the most-value inner coil is greater than or equal to the most-value temperature in the refrigeration mode or the temperature of the most-value inner coil is less than or equal to the most-value temperature in the heating mode, the situation that the heat exchange condition of the indoor unit is poor is indicated, the air conditioner is likely to be blocked, and at the moment, the air conditioner can output prompt information to prompt a user or after-sales maintenance personnel to check the air conditioner.

When it is determined whether the air conditioner is clogged through steps 301 to 306, a misdetermination may still occur. For the refrigeration mode, if the stop valve is closed, the temperature of the inner coil can fluctuate at the moment of starting the compressor due to the fact that the refrigerant is quickly recycled to the compressor from the inside of the evaporator, the temperature firstly declines and then rises, the temperature of the inner coil at the maximum value detected by the air conditioner can be the temperature of the inner coil which reaches the minimum fluctuation in the fluctuation process, if the temperature of the inner coil at the maximum value is adopted as the temperature of the inner coil at the maximum value, the maximum variation amplitude of the temperature of the inner coil calculated by the air conditioner is larger than the value obtained by actual calculation, and the air conditioner can be mistakenly judged to have no blockage. In addition, if the difference between the initial indoor temperature and the set temperature in the room is not large, the temperature rise value between the maximum inner coil temperature and the initial inner coil temperature may be smaller than the preset protection temperature difference, so that the air conditioner makes a wrong judgment that no blockage occurs.

In order to avoid such a misjudgment, the judgment may be performed once again according to the operating current of the compressor, and referring to fig. 4, before the step of outputting the prompting message of the air conditioner blockage, the method further includes:

401. and sampling the working current of the compressor for multiple times to obtain multiple sampled current values.

The air conditioner can sample the working current of the compressor for multiple times according to the preset sampling frequency so as to obtain multiple sampling current values.

The purpose of sampling the working current by the air conditioner may refer to the purpose of sampling the current working current value in step 203, which is not described herein again. It is understood that the reason for performing the sampling a plurality of times is to avoid the contingency, and if the current is sampled only once, the misjudgment may be caused because the current value fluctuates.

402. And if the sampling current values are smaller than a first preset protection current value, controlling the compressor to stop.

403. And after a second preset time interval, restarting the compressor, and judging whether the air conditioner is blocked again.

404. And if the air conditioner is blocked, executing the step of outputting the prompt message of the blockage.

If the sampling current values are all smaller than the first preset protection current value, the working current of the compressor is always kept at a lower value, so that the compressor does not work on the refrigerant, and the air conditioner is possibly blocked. At this time, the air conditioner controls the compressor to stop, and after a second preset time interval, the compressor is restarted to detect whether the air conditioner is blocked again. If the air conditioner is still blocked, a prompt message for indicating the blockage is sent out, and the compressor and the outdoor fan are controlled to stop. If the user or the maintenance personnel need to release the state of sending the prompt message, the power supply of the air conditioner can be disconnected, and then the power supply is powered on again. If the air conditioner does not meet the preset blocking condition at the moment, the detection result before is probably because the compressor is accidentally in a working failure or the detection error occurs in the detection process, so that the air conditioner is not blocked and is normally operated.

It should be noted that, when the air conditioner controls the compressor to stop, the outdoor fan may also be controlled to stop to reduce the power consumption.

In addition, the air conditioner may also sample the overall working current of the air conditioner to replace the working current of the compressor, which is not described herein again.

In order to better implement the method for identifying the blockage of the air conditioner in the embodiment of the present application, on the basis of the method for identifying the blockage of the air conditioner, an apparatus for identifying the blockage of the air conditioner is further provided in the embodiment of the present application, as shown in fig. 5, which is a schematic structural diagram of an embodiment of the apparatus for identifying the blockage of the air conditioner in the embodiment of the present application, and the apparatus 500 for identifying the blockage of the air conditioner includes:

an obtaining unit 501, configured to obtain an initial room temperature of an area where an air conditioner is located and an initial temperature of an internal coil of the air conditioner;

a determining unit 502, configured to determine whether the air conditioner is started up for the first time according to the initial room temperature and the initial temperature of the inner coil;

a blockage determination unit 503, configured to determine whether the air conditioner is blocked according to a current operation parameter of a compressor in the air conditioner if the air conditioner is started for the first time;

an output unit 504, configured to output a prompt message of air conditioner blockage if the air conditioner is blocked.

In a possible implementation manner of the embodiment of the present application, the determining unit 502 is further configured to:

calculating the frequency change rate of the compressor according to the operating frequency of each compressor, and calculating the bus voltage change rate of each air conditioner according to the bus voltage of each air conditioner;

In a possible implementation manner of the embodiment of the present application, the air conditioner blockage recognition apparatus 500 further includes an extraction unit 505, where the extraction unit 505 is configured to:

In a possible implementation manner of the embodiment of the present application, the extracting unit 505 is further configured to:

In a possible implementation manner of the embodiment of the present application, the air conditioner blockage recognition apparatus 500 further includes a sampling unit 506, where the sampling unit 506 is configured to:

In a possible implementation manner of the embodiment of the present application, the current operation parameter includes a current operation frequency and a current operation current, and the blockage determining unit 503 is further configured to:

In a specific implementation, the above units may be implemented as independent entities, or may be combined arbitrarily to be implemented as the same or several entities, and the specific implementation of the above units may refer to the foregoing method embodiments, which are not described herein again.

Since the air conditioner blockage recognition device can execute the steps in the air conditioner blockage recognition method in any embodiment of the present application, the beneficial effects that can be realized by the air conditioner blockage recognition method in any embodiment of the present application can be realized, which are detailed in the foregoing description and will not be repeated herein.

In addition, in order to better implement the method for identifying the air conditioner blockage in the embodiment of the present application, based on the method for identifying the air conditioner blockage, the embodiment of the present application further provides an air conditioner, referring to fig. 6, fig. 6 shows a schematic structural diagram of the air conditioner in the embodiment of the present application, specifically, the air conditioner provided in the embodiment of the present application includes a processor 601, and the processor 601 is configured to implement each step of the method for identifying the air conditioner blockage in any embodiment when executing the computer program stored in the memory 602; alternatively, the processor 601 is configured to implement the functions of the units in the corresponding embodiment of fig. 5 when executing the computer program stored in the memory 602.

Illustratively, a computer program may be partitioned into one or more modules/units, which are stored in memory 602 and executed by processor 601 to implement embodiments of the present application. One or more modules/units may be a series of computer program instruction segments capable of performing certain functions, the instruction segments being used to describe the execution of a computer program in a computer device.

The air conditioner may include, but is not limited to, a processor 601, a memory 602. Those skilled in the art will appreciate that the illustration is merely an example of an air conditioner, and does not constitute a limitation of the air conditioner, and may include more or less components than those illustrated, or some components may be combined, or different components, for example, the air conditioner may further include an input output device, a network access device, a bus, etc., and the processor 601, the memory 602, the input output device, the network access device, etc., are connected through the bus.

The Processor 601 may be a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic device, discrete hardware component, etc. The general purpose processor may be a microprocessor or the processor may be any conventional processor or the like, the processor being the control center of the air conditioner and connected to the various parts of the overall air conditioner by various interfaces and lines.

The memory 602 may be used to store computer programs and/or modules, and the processor 601 may implement various functions of the computer apparatus by executing or executing the computer programs and/or modules stored in the memory 602 and invoking data stored in the memory 602. The memory 602 may mainly include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application program required by at least one function (such as a sound playing function, an image playing function, etc.), and the like; the storage data area may store data (such as audio data, video data, etc.) created according to the use of the air conditioner, etc. In addition, the memory may include high speed random access memory, and may also include non-volatile memory, such as a hard disk, a memory, a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), at least one magnetic disk storage device, a Flash memory device, or other volatile solid state storage device.

It can be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific working processes of the air conditioner blockage recognition device, the air conditioner and the corresponding units thereof described above may refer to the description of the air conditioner blockage recognition method in any embodiment, and are not described herein in detail.

It will be understood by those skilled in the art that all or part of the steps of the methods of the above embodiments may be performed by instructions, or by instructions controlling associated hardware, which may be stored in a computer-readable storage medium and loaded and executed by a processor.

For this reason, embodiments of the present application provide a computer-readable storage medium, where multiple instructions are stored, where the instructions can be loaded by a processor to perform steps in an air conditioner blockage identification method in any embodiment of the present application, and specific operations may refer to descriptions of the air conditioner blockage identification method in any embodiment, which are not repeated herein.

Wherein the computer-readable storage medium may include: read Only Memory (ROM), random Access Memory (RAM), magnetic or optical disks, and the like.

Since the instructions stored in the computer-readable storage medium can execute the steps in the method for identifying the blockage of the air conditioner in any embodiment of the present application, the beneficial effects that can be achieved by the method for identifying the blockage of the air conditioner in any embodiment of the present application can be achieved, which are detailed in the foregoing description and are not repeated herein.

The method, the device, the storage medium and the air conditioner for identifying the blockage of the air conditioner provided by the embodiment of the application are introduced in detail, a specific example is applied to explain the principle and the implementation mode of the application, and the description of the embodiment is only used for helping to understand the method and the core idea of the application; meanwhile, for those skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.

Claims

1. An air conditioner blockage identification method, characterized in that the method comprises:

if the frequency change rate is smaller than a first preset change rate and the bus voltage change rate is larger than a second preset change rate, judging that the air conditioner is started for the first time;

if the air conditioner is started for the first time, the current running frequency of a compressor in the air conditioner is greater than or equal to a first preset protection frequency, and/or the current working current value of the air conditioner is smaller than or equal to a second preset protection current value, judging that the air conditioner is blocked;

2. The method of claim 1, wherein before outputting the indication of the air conditioner blockage, the method further comprises:

extracting a maximum inner coil temperature from the plurality of inner coil temperatures according to the operation mode of the air conditioner;

3. The method as claimed in claim 2, wherein said determining whether the air conditioner is blocked according to the maximum inner coil temperature and the initial inner coil temperature comprises:

4. The air conditioner jam recognition method according to claim 2, wherein before the step of executing the step of outputting the prompt message of the air conditioner jam, further comprising:

5. An air conditioner clogging recognition apparatus characterized by comprising:

the judging unit is used for calculating a first temperature deviation value between the initial room temperature and the initial inner coil temperature;

the blockage judging unit is used for judging that the air conditioner is blocked if the air conditioner is started for the first time, the current running frequency of a compressor in the air conditioner is greater than or equal to a first preset protection frequency, and/or the current working current value of the air conditioner is less than or equal to a second preset protection current value;

and the output unit is used for outputting the prompt message of the air conditioner blockage if the air conditioner is blocked.

6. An air conditioner comprising a processor and a memory, wherein the memory stores a computer program, and the processor executes the air conditioner blockage recognition method according to any one of claims 1 to 4 when calling the computer program in the memory.

7. A readable storage medium, having stored thereon a computer program to be loaded by a processor for performing the steps of the air conditioner blockage identification method according to any one of claims 1 to 4.