Valve blockage identification method, air conditioner and computer-readable storage medium

Abstract

The present invention discloses a valve blockage identification method, an air conditioner, and a computer-readable storage medium. The method includes the following steps: monitoring the operating conditions of a compressor, and determining whether the compressor is in a preset stable state based on the operating conditions; when the compressor is in the preset stable state, recording the compressor's current steady-state return air temperature and steady-state exhaust temperature; monitoring the ambient temperature and the compressor's real-time return air temperature, and obtaining the initial return air temperature when the compressor is powered on; and identifying whether a valve blockage has occurred in the air conditioning system based on the steady-state return air temperature, the steady exhaust temperature, the ambient temperature, the real-time return air temperature, and the initial return air temperature. The present invention can accurately identify valve blockage at a very low cost without adding other components to the air conditioning system.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning, and in particular to a valve blockage identification method, an air conditioner and a computer-readable storage medium. Background Art

[0002] Currently, it's common for air conditioner outdoor units to experience clogged valves during use, or to be forgotten to open them after inspection and after-sales installation. When valves aren't open, or are only partially open, refrigerant can't circulate through the pipes, causing the compressor's exhaust and return air temperatures to rise continuously. Without refrigerant to carry away the heat, the compressor motor's temperature rises above its design limit, damaging the compressor and other components in the air conditioning system. In variable-frequency compressors, this can also cause demagnetization and, in extreme cases, explosions. Therefore, monitoring and identifying valve blockages is crucial to prevent damage to the air conditioner. Summary of the Invention

[0003] The main purpose of the present invention is to provide a valve blockage identification method, an air conditioner and a computer-readable storage medium, aiming to solve the technical problem of how to identify the blockage of the air conditioner valve.

[0004] To achieve the above object, the present invention provides a valve blockage identification method, which is applied to an air conditioning system. The valve blockage identification method comprises the following steps:

[0005] monitoring the operating condition of the compressor, and determining whether the compressor is in a preset stable state according to the operating condition;

[0006] When the compressor is in a preset stable state, recording the steady-state return air temperature and the steady-state exhaust air temperature of the compressor at the current moment;

[0007] Monitor the ambient temperature and the real-time return air temperature of the compressor, and obtain the initial return air temperature when the compressor is powered on;

[0008] Whether valve blockage occurs in the air conditioning system is identified according to the steady-state return air temperature, the steady-state exhaust temperature, the external ambient temperature, the real-time return air temperature, and the initial return air temperature.

[0009] Optionally, the step of monitoring the operating condition of the compressor and determining whether the compressor is in a preset stable state according to the operating condition includes:

[0010] Monitor the operating frequency of the compressor in real time to determine whether the operating frequency reaches a preset frequency;

[0011] If the operating frequency reaches the preset frequency, the current value of the compressor is collected every preset period;

[0012] Determining the current change values ​​of the adjacent cycle lengths according to the current values ​​collected at each preset cycle length;

[0013] Determining whether the current change value is less than or equal to a preset first change threshold;

[0014] If the current change value is less than or equal to a preset first change threshold, it is determined that the compressor is in a preset stable state.

[0015] Optionally, after the step of determining whether the current change value is less than or equal to a preset first change threshold, the method further includes:

[0016] If the current change value is greater than a preset first change threshold, determining whether the current change value is greater than a preset second change threshold, wherein the second change threshold is greater than the first change threshold;

[0017] If the current change value is greater than a preset second change threshold, obtaining the operating time of the compressor after startup, and determining whether the operating time is greater than a preset stable time;

[0018] If the operating time is greater than the preset stable time, it is determined that the compressor is in a preset stable state.

[0019] Optionally, the step of identifying whether valve blockage occurs in the air-conditioning system based on the steady-state return air temperature, the steady-state exhaust temperature, the external ambient temperature, the real-time return air temperature, and the initial return air temperature includes:

[0020] Determining whether the steady-state return air temperature is greater than the external ambient temperature and the steady-state exhaust temperature is greater than a preset first temperature threshold;

[0021] If the steady-state return air temperature is greater than the ambient temperature and the steady-state exhaust temperature is greater than a preset first temperature threshold, determining whether the difference between the real-time return air temperature and the initial return air temperature is greater than a preset second temperature threshold;

[0022] If the difference between the real-time return air temperature and the initial return air temperature is greater than a preset second temperature threshold, it is determined that a valve blockage occurs in the air conditioning system.

[0023] Optionally, the step of identifying whether valve blockage occurs in the air-conditioning system based on the steady-state return air temperature, the steady-state exhaust temperature, the external ambient temperature, the real-time return air temperature, and the initial return air temperature includes:

[0024] Determining whether the steady-state return air temperature is greater than the external ambient temperature;

[0025] If the steady-state return air temperature is greater than the external ambient temperature, obtaining the operating time of the compressor after startup;

[0026] Determine whether the running time is greater than a preset safety time;

[0027] If the operating time is greater than a preset safety time, it is determined that a valve blockage occurs in the air-conditioning system.

[0028] Optionally, the step of identifying whether valve blockage occurs in the air-conditioning system based on the steady-state return air temperature, the steady-state exhaust temperature, the external ambient temperature, the real-time return air temperature, and the initial return air temperature includes:

[0029] Determining whether the real-time return air temperature is greater than the real-time exhaust temperature corresponding to the real-time return air temperature at the same time;

[0030] If the real-time return air temperature is greater than the real-time exhaust air temperature, it is determined that a valve blockage occurs in the air-conditioning system.

[0031] Optionally, after the step of identifying whether a valve blockage occurs in the air conditioning system, the method further includes:

[0032] If it is determined that a valve blockage occurs in the air-conditioning system, the operation of the compressor is stopped and valve blockage fault information is output.

[0033] Optionally, the step of outputting valve blockage fault information includes:

[0034] determining a user terminal connected to the air conditioning system;

[0035] According to the terminal attributes of the user terminal, valve blockage fault information corresponding to the terminal attributes is sent to the user terminal.

[0036] In addition, to achieve the above-mentioned purpose, the present invention also provides an air conditioner, comprising a processor, a memory, and a valve blockage identification program stored in the memory and executable by the processor, wherein when the valve blockage identification program is executed by the processor, the steps of the valve blockage identification method described above are implemented.

[0037] The present invention also provides a computer-readable storage medium, on which a valve blockage identification program is stored. When the valve blockage identification program is executed by a processor, the steps of the valve blockage identification method described above are implemented.

[0038] The valve blockage identification method in the technical solution of the present invention monitors the operating conditions of the compressor in real time, and determines whether the compressor is in a stable state based on the operating conditions. It can ensure that the compressor reaches a stable state corresponding to the indoor air parameters set by the user after running for a period of time after power-on, and prevents misjudgment of various faults when the compressor is not yet stable; by collecting the steady-state return air temperature and the steady-state scheduled temperature when the compressor is just stable, and collecting the external ambient temperature and the real-time return air temperature of the compressor in real time after the compressor is stable, as well as obtaining the initial return air temperature collected and recorded when the compressor is just powered on, it can comprehensively analyze the above-mentioned multiple different temperature parameters related to the compressor to accurately determine whether the valve in the air-conditioning system is blocked, and there is no need to add other auxiliary detection components to the air-conditioning system. The cost of achieving the above-mentioned purpose of accurately determining valve blockage is extremely low, and it can be applicable to various air-conditioning systems and air conditioners, with broad application prospects and economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 A schematic diagram of the terminal structure of the hardware operating environment of the air conditioner involved in the embodiment of the present invention;

[0040] Figure 2 This is a flow chart of a first embodiment of a valve blockage identification method according to the present invention;

[0041] Figure 3 This is a flow chart of an application scenario of the valve blockage identification method of the present invention;

[0042] Figure 4 Schematic diagram of the current temperature monitoring transition curve involved in the valve blockage identification method of the present invention.

[0043] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0044] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0045] Summary of the technical solution of the present invention:

[0046] You can refer to Figure 4 , Figure 4 Schematic diagram of the current temperature monitoring transition curve involved in the valve blockage identification method of the present invention;

[0047] In the preliminary conditions of the present invention, a large number of air conditioner prototypes were monitored for compressor current and various compressor temperatures when the valve was blocked (closed), and the current and temperature monitoring transition curves of the experimental prototypes were obtained, such as Figure 4As shown, the horizontal axis represents time in seconds. The vertical axis on the left represents current in A, and the vertical axis on the right represents temperature. Curve ① represents the compressor current, curve ② represents the middle temperature of the compressor, curve ③ represents the bottom temperature of the compressor, curve ④ represents the top temperature of the compressor, curve ⑤ represents the return air temperature of the compressor, and curve ⑥ represents the discharge air temperature of the compressor.

[0048] It is not difficult to see from the figure that after the compressor is turned on, the compressor current is stable for 3min-16min, and the temperature changes are not big, so the compressor can basically be considered normal; from 16min to 21min, the compressor current fluctuates violently, and the temperature exceeds the normal range, so it can be considered that the compressor is partially demagnetized, and the compressor can still operate; after 31min, the temperature of the compressor is seriously too high, causing the compressor to be completely demagnetized and unable to operate. The fault code P46 can be reported and the compressor will be shut down.

[0049] Based on the above monitoring results, three parallel valve blockage identification processes are further obtained in the following embodiments. First, it is determined whether the compressor is in a stable state based on the operating conditions of the compressor, with the purpose of preventing misjudgment of various faults in the air-conditioning system. Then, when the compressor is in a stable state, multiple temperature parameters related to the compressor are obtained, including steady-state return air temperature, steady-state exhaust temperature, external ambient temperature, real-time return air temperature, and initial return air temperature. From these temperature parameters, corresponding temperature parameters are selected according to different parallel valve blockage identification processes for comparison. At the same time, the operating time of the compressor is also timed to ensure that various abnormal temperature conditions caused by valve blockage of the compressor can be identified by the air-conditioning system, making the identification of valve blockage more comprehensive and ensuring that the compressor can be shut down in a timely manner within the safe time limit, thereby protecting the compressor.

[0050] An embodiment of the present invention provides an air conditioner. The air conditioner can be any type of air conditioner, such as a wall-mounted air conditioner, a cabinet air conditioner, a portable air conditioner, a window air conditioner, a multi-split air conditioner, a ceiling-mounted air conditioner, etc., without limitation herein.

[0051] like Figure 1 As shown, Figure 1 It is a structural diagram of the hardware operating environment of the air conditioner involved in the embodiment of the present invention.

[0052] like Figure 1As shown, the air conditioner may include: a processor 1001, such as a CPU, a network interface 1004, a user interface 1003, a memory 1005, and a communication bus 1002. The communication bus 1002 is used to realize the connection and communication between these components. The user interface 1003 may include a display (Display), an input unit such as a control panel, and the user interface 1003 may optionally include a standard wired interface and a wireless interface. The network interface 1004 may optionally include a standard wired interface and a wireless interface (such as a WIFI interface). The memory 1005 may be a high-speed RAM memory or a stable memory (non-volatile memory), such as a disk memory. The memory 1005 may optionally be a storage device independent of the aforementioned processor 1001. The memory 1005, which serves as a computer storage medium, may include a valve blockage identification program.

[0053] Those skilled in the art will understand that Figure 1 The hardware structure shown in the figure does not constitute a limitation of the device, and may include more or fewer components than shown in the figure, or combine certain components, or arrange the components differently.

[0054] Continue to refer to Figure 1 , Figure 1 The memory 1005 as a computer-readable storage medium may include an operating system, a user interface module, a network communication module, and a valve blockage identification program.

[0055] exist Figure 1 In the embodiment, the network communication module is mainly used to connect to the server and perform data communication with the server; and the processor 1001 can call the valve blockage identification program stored in the memory 1005 and execute the steps in the following embodiments.

[0056] Based on the hardware structure of the controller described above, various embodiments of the valve blockage identification method of the present invention are proposed.

[0057] An embodiment of the present invention provides a valve blockage identification method.

[0058] Please refer to Figure 2 , Figure 2 1 is a flow chart of a first embodiment of a valve blockage identification method according to the present invention. In the first embodiment of the present invention, the valve blockage identification method includes the following steps:

[0059] Step S10, monitoring the operating condition of the compressor, and determining whether the compressor is in a preset stable state according to the operating condition;

[0060] Currently, valve blockage identification is mainly achieved by installing a low-pressure switch at the valve. The low-pressure switch is used to determine whether the valve is blocked. However, most air-conditioning systems do not have a low-pressure switch, so the utilization rate of the low-pressure switch is low. If a low-pressure switch is installed for each user, the economic and labor costs will be very high.

[0061] In this embodiment, the compressor may be a fixed-frequency compressor or a variable-frequency compressor, exemplarily a variable-frequency compressor. The operating conditions of the compressor may include the ambient temperature, the current value, voltage value, power value of the compressor, the operating frequency of the compressor, and the internal pressure of the compressor.

[0062] For example, whether the compressor has reached a stable state can be determined based on the current value in the above operating condition, the corresponding current change value, and the compressor operating power.

[0063] Specifically, it is possible to first determine whether the real-time operating frequency of the compressor has reached the preset frequency. If the preset frequency is reached, the compressor can be operated for a preset time interval. The current value of the compressor is collected at regular intervals, and the current change value is determined based on the current values ​​collected in two adjacent periods. The current change value is compared with the change threshold corresponding to the normal operating condition of the air-conditioning system to determine whether the compressor has reached a stable state.

[0064] It should be noted that the above-mentioned preset frequency can be set as a default value according to actual needs, or can correspond to the indoor air parameters set by the user. It can be understood that the user will set different indoor air parameters according to the comfort needs indoors, such as cooling mode or heating mode, indoor set temperature, wind speed, dehumidification, etc. A mapping association table can be established between the indoor air parameters and the preset frequency, so that after determining the indoor air parameters, the preset frequency can be quickly found and determined.

[0065] In addition, it can also be judged based on the external ambient temperature, the voltage value or power value of the compressor. Specifically, the external ambient temperature and the indoor air parameters set by the user are obtained, and the standard voltage range of the compressor or the standard power range of the compressor is determined based on the external ambient temperature and the indoor air parameters set by the user. It is judged whether the actual voltage value or power value of the compressor is within the standard voltage range or the standard power range of the compressor. If so, it is determined that the compressor has reached a stable state. Otherwise, it is determined that the stable state has not been reached.

[0066] Step S20, when the compressor is in a preset stable state, recording the steady-state return air temperature and the steady-state exhaust air temperature of the compressor at the current moment;

[0067] Once the compressor reaches a steady state, the steady-state return air temperature TH1 and the steady-state discharge air temperature TP1 of the compressor at this time are collected and recorded.

[0068] It should be noted that obtaining various temperature parameters after the compressor is stable can effectively prevent misjudgment of various faults in the air-conditioning system when the compressor operation is not yet stable, thereby further ensuring the accuracy of identifying valve blockage.

[0069] Step S30, monitoring the external ambient temperature and the real-time return air temperature of the compressor, and obtaining the initial return air temperature when the compressor is powered on;

[0070] The external ambient temperature can be the average value of the temperature values ​​collected by multiple temperature sensors in the outdoor unit. When counting the temperature values ​​collected by multiple temperature sensors, abnormal temperature values, that is, temperature values ​​that are obviously too low or too high, are discarded. Whether a temperature value is an abnormal temperature value can be determined according to general common standards, which will not be repeated here.

[0071] The real-time return air temperature of the compressor can be collected at a certain frequency, for example, once every 10 seconds.

[0072] The initial return air temperature is the return air temperature collected and stored in the cache space when the compressor is just powered on. It is only necessary to extract the cached initial return air temperature.

[0073] Step S40 , identifying whether valve blockage occurs in the air conditioning system based on the steady-state return air temperature, the steady-state exhaust temperature, the external ambient temperature, the real-time return air temperature, and the initial return air temperature.

[0074] Whether valve blockage occurs in the air conditioning system is determined based on one or more parameters of the steady-state return air temperature TH1, the steady-state exhaust temperature TP1, the external ambient temperature Tw, the real-time return air temperature TH, and the initial return air temperature TH0.

[0075] Specifically, in another embodiment, step S40 includes:

[0076] Step a, determining whether the steady-state return air temperature is greater than the external ambient temperature and the steady-state exhaust temperature is greater than a preset first temperature threshold;

[0077] Step b: if the steady-state return air temperature is greater than the ambient temperature and the steady-state exhaust temperature is greater than a preset first temperature threshold, determining whether the difference between the real-time return air temperature and the initial return air temperature is greater than a preset second temperature threshold;

[0078] Step c: If the difference between the real-time return air temperature and the initial return air temperature is greater than a preset second temperature threshold, it is determined that a valve blockage occurs in the air conditioning system.

[0079] After the compressor is determined to be in a stable state, the steady-state return air temperature TH1 is compared with the external ambient temperature Tw, and the steady-state exhaust temperature TP1 is compared with the first temperature threshold TY1. When the steady-state return air temperature is greater than the external ambient temperature and the steady-state exhaust temperature TP1 is greater than the first temperature threshold, that is, when TH1>Tw, TP1>TY1 is reached, it is determined whether the difference between the real-time return air temperature TH and the initial return air temperature TH0 is greater than the second temperature threshold TY2, that is, it is determined that TH-TH0>TY2. If TH-TH0>TY2, it is determined that a valve blockage has occurred in the air-conditioning system.

[0080] It should be noted that the real-time return air temperature low TH can be collected at the compressor's return air inlet at a frequency of once every 10 seconds. The first temperature threshold TY1 can be set based on actual needs, illustratively at 50°C. The second temperature threshold TY2 can also be set based on actual needs, illustratively at 10°C. This is based on experimental temperature results. If the difference between the real-time return air temperature and the initial return air temperature is greater than 10°C, it indicates a valve blockage abnormality.

[0081] In this embodiment, based on Figure 4 The monitoring results can be compared between the steady-state return air temperature and the external ambient temperature, between the steady-state exhaust temperature and the preset first temperature threshold, and between the real-time return air temperature and the initial return air temperature. When the above conditions are met, it means that the gate valve is blocked, thereby accurately identifying the gate valve blockage, which is conducive to further timely protection of the compressor.

[0082] The valve blockage identification method in the technical solution of the present invention monitors the operating conditions of the compressor in real time, and determines whether the compressor is in a stable state based on the operating conditions. It can ensure that the compressor reaches a stable state corresponding to the indoor air parameters set by the user after running for a period of time after power-on, and prevents misjudgment of various faults when the compressor is not yet stable; by collecting the steady-state return air temperature and the steady-state scheduled temperature when the compressor is just stable, and collecting the external ambient temperature and the real-time return air temperature of the compressor in real time after the compressor is stable, as well as obtaining the initial return air temperature collected and recorded when the compressor is just powered on, it can comprehensively analyze the above-mentioned multiple different temperature parameters related to the compressor to accurately determine whether the valve in the air-conditioning system is blocked, and there is no need to add other auxiliary detection components to the air-conditioning system. The cost of achieving the above-mentioned purpose of accurately determining valve blockage is extremely low, and it can be applicable to various air-conditioning systems and air conditioners, with broad application prospects and economic benefits.

[0083] Furthermore, based on the first embodiment of the valve blockage identification method of the present invention, a second embodiment of the valve blockage identification method of the present invention is proposed. In this embodiment, step S10 includes:

[0084] Step d, monitoring the operating frequency of the compressor in real time, and determining whether the operating frequency reaches a preset frequency;

[0085] Step e: if the operating frequency reaches the preset frequency, collecting the current value of the compressor at every preset period;

[0086] Step f, determining the current change values ​​of the adjacent cycle lengths according to the current values ​​collected at each preset cycle length;

[0087] Step g, determining whether the current change value is less than or equal to a preset first change threshold;

[0088] Step h: If the current change value is less than or equal to a preset first change threshold, it is determined that the compressor is in a preset stable state.

[0089] In this embodiment, the preset frequency can be set according to actual needs, or it can correspond to the indoor air parameters set by the user. It should be noted that although the preset frequency can be set according to actual needs, in general, the actual needs must meet the specifications of the compressor to be meaningful. In other words, the preset frequency corresponds to the specifications of the compressor.

[0090] After the operating frequency of the compressor reaches the preset frequency, the compressor current value needs to be collected again according to the preset period after a preset time interval. The preset time interval can be set according to actual needs, and is exemplarily 1 minute. The preset period length can also be set according to actual needs, and is exemplarily 10 seconds.

[0091] The current change value of the two cycles before and after is determined based on the current values ​​collected therein, and it is judged whether the current change value is less than or equal to a preset first change threshold, where the first change threshold can be set according to actual needs, and is 0.2A for example.

[0092] Once the current change value is less than or equal to the first change threshold, it is determined that the compressor is in a stable state, so that the subsequent determination process of whether valve blockage occurs in the air-conditioning system is performed as soon as possible.

[0093] In addition, if the current change value is greater than the first change threshold, it is determined whether the running time of the compressor after power-on is greater than 6 minutes (which can be called the preset first stable time). If it is greater than 6 minutes, the compressor is also determined to be in a stable state. It should be noted that this determination result does not mean that the compressor is actually in a stable state, but it is for the purpose of further determining whether the air-conditioning system has valve blockage based on other conditions after determining the stable state. If the valve is blocked, the compressor can be started in time within the safety time of the compressor to perform protection operations such as power-off.

[0094] In one embodiment, after the step of determining whether the current change value is less than or equal to a preset first change threshold, the method further includes:

[0095] Step i: if the current change value is greater than a preset first change threshold, determining whether the current change value is greater than a preset second change threshold, wherein the second change threshold is greater than the first change threshold;

[0096] Step j: if the current change value is greater than a preset second change threshold, obtaining the operating time of the compressor after startup, and determining whether the operating time is greater than a preset stable time;

[0097] Step k: If the operating time is greater than a preset stable time, it is determined that the compressor is in a preset stable state.

[0098] If the current change value is greater than the preset first change threshold, it can be further determined whether the current change value is greater than the preset second change threshold, wherein the second change threshold is greater than the first change threshold and can be set according to actual needs. For example, the second change threshold is 0.5A.

[0099] If the current change value is greater than the second change threshold, it is determined whether the compressor's operating time is greater than a preset stable time (which can be called the second stable time, as distinguished from the first stable time). When the compressor's operating time is greater than the preset stable time, the compressor is determined to be in a stable state. The preset stable time can be set based on actual needs, illustratively, for example, 3 minutes. This 3 minutes is shorter than the first stable time of 6 minutes. This is done to allow the air conditioning system to more quickly determine valve blockage when the compressor's current changes significantly, thereby preventing damage to the compressor caused by valve blockage in a timely manner.

[0100] Furthermore, based on the above-mentioned embodiment of the valve blockage identification method of the present invention, a third embodiment of the valve blockage identification method of the present invention is proposed. In this embodiment, step S40 includes:

[0101] Step 1, determining whether the steady-state return air temperature is greater than the external ambient temperature;

[0102] Step m: if the steady-state return air temperature is greater than the external ambient temperature, obtaining the operating time of the compressor after startup;

[0103] Step n, determining whether the running time is greater than a preset safety time;

[0104] In step o, if the operating time is greater than the preset safety time, it is determined that a valve blockage occurs in the air conditioning system.

[0105] In this embodiment, the steady-state return air temperature TH1 is compared with the external ambient temperature Tw. When TH1>Tw, the operating time of the compressor since power-on is obtained, and it is determined whether the operating time of the compressor is greater than the preset safety time. If it is greater than the preset safety time, it is determined that the valve of the air-conditioning system is blocked, wherein the preset safety time is the time limit for the safe operation of the compressor, illustratively, it is 16 minutes.

[0106] In this embodiment, based on Figure 4 Based on the monitoring results, by comparing the steady-state return air temperature with the external ambient temperature and judging the compressor running time, it is possible to take no action within the 16-minute compressor safety time limit based on the less serious abnormal situation that the steady-state return air temperature is greater than the external ambient temperature. When this limit is exceeded, it is determined that the valve is blocked and the compressor is further protected. In this way, even less serious abnormal situations can be handled in a timely and safe manner, and the compressor is fully protected, because this situation is also very likely to be caused by valve blockage.

[0107] Furthermore, based on the above-mentioned embodiment of the valve blockage identification method of the present invention, a fourth embodiment of the valve blockage identification method of the present invention is proposed. In this embodiment, step S40 includes:

[0108] Step p, determining whether the real-time return air temperature is greater than the real-time exhaust temperature corresponding to the real-time return air temperature at the same moment;

[0109] Step q: If the real-time return air temperature is greater than the real-time exhaust air temperature, it is determined that a valve blockage occurs in the air conditioning system.

[0110] After the compressor stabilizes, the real-time return air temperature TH is compared with the real-time exhaust temperature TP at the same sampling time. When TH>TP, it can be determined that the air conditioning system valve is blocked.

[0111] Through this embodiment, by comparing the real-time return air temperature with the real-time exhaust temperature, based on the experimental knowledge that the compressor return air temperature is greater than the exhaust temperature, which is a serious case of valve blockage, it is determined in a timely and accurate manner that the valve is blocked, and the compressor is protected.

[0112] Furthermore, based on the above-mentioned embodiment of the valve blockage identification method of the present invention, a fifth embodiment of the valve blockage identification method of the present invention is proposed. In this embodiment, after step S40, the following steps are included:

[0113] If it is determined that a valve blockage occurs in the air-conditioning system, the operation of the compressor is stopped and valve blockage fault information is output.

[0114] If a valve in the air conditioning system is clogged, the compressor and the air conditioning system will stop operating. Information about the valve blockage fault will be displayed on the display panel and audio module of the indoor unit or remote control. Specifically, the display panel will display detailed text information about the valve blockage fault, as well as the corresponding fault code. A voice alarm will also be issued through the audio module. Furthermore, for air conditioning systems connected to the network, this information can be uploaded to a server.

[0115] In addition, the air-conditioning system can also output valve blockage fault information to the user terminal connected to the air-conditioning system, and output the valve blockage fault information through the user terminal to remind the user to inspect the valve in time to ensure the normal use of the air-conditioning system.

[0116] Specifically, the step of outputting valve blockage fault information includes:

[0117] determining a user terminal connected to the air conditioning system;

[0118] According to the terminal attributes of the user terminal, valve blockage fault information corresponding to the terminal attributes is sent to the user terminal.

[0119] At the same time, there may be a single or multiple user terminals that are wirelessly connected to the air-conditioning system. For example, the user terminal and the air-conditioning system are connected to each other via a local area network under the same WIFI or are connected to each other through a server.

[0120] Obtain the terminal attributes of the user terminal, where the terminal attributes are also the terminal type of the user terminal. For example, the user terminal can be a personal computer, mobile phone, tablet, TV, projector and other smart terminals. Since each user terminal has a different operating system and different message push mode, the air-conditioning system can send corresponding types of valve blockage fault information to different types of user terminals. For example, the mobile phone can push the valve blockage fault information in the form of text messages, the personal computer can push the valve blockage fault information in the form of pop-up windows, and the TV can push the valve blockage fault information in the form of message broadcasts.

[0121] Through this embodiment, when a valve is blocked, the air conditioning system can send a valve blockage fault message to the user in a variety of ways, so that the user can promptly discover the valve blockage problem and take corresponding measures, ensuring that the air conditioning system can be restored to normal use in a timely manner.

[0122] To further understand the present invention and the above embodiments, please refer to Figure 3 , Figure 3 This is a flow chart of an application scenario of the valve blockage identification method of the present invention;

[0123] As shown in the figure, Figure 3 The flow chart shows a scenario for identifying valve blockage from the moment the compressor is powered on to the moment the valve blockage protection program is activated. Specifically, after the compressor is powered on for the first time, the exhaust gas temperature TP0 (initial exhaust gas temperature) and the return gas temperature TH0 (initial return gas temperature) are recorded. The compressor then waits until it reaches the set frequency (preset frequency) and records the compressor current value from the second minute. The current change between two adjacent cycles is obtained for each preset cycle duration. If the current change is less than 0.2A, the compressor is deemed to be operating stably, and the following three valve blockage fault identification processes are executed. If the current change is greater than 0.2A, the compressor continues to operate until the time (operation duration) reaches 6 minutes, at which point the compressor is deemed to be operating stably, and the following three valve blockage fault identification processes are executed.

[0124] Identify valve blockage fault process:

[0125] ① If the steady-state return air temperature TH1 is greater than the external ambient temperature Tw and the time exceeds 1 minute, the valve is determined to be blocked, a fault is reported, and the compressor is stopped;

[0126] ② If the steady-state return air temperature TH1 is greater than the external ambient temperature Tw, and the steady-state exhaust temperature TP1 is greater than 50°C, and TH-TH0 is greater than 10°C, the valve is determined to be blocked, a fault is reported, and the compressor is stopped;

[0127] ③If TH>TP, the valve is determined to be blocked, a fault is reported, and the compressor is stopped.

[0128] In combination with the above-mentioned embodiments, when any abnormal situation of valve blockage related to the compressor is determined, the valve blockage can be determined, thereby making the identification of valve blockage fault more comprehensive and accurate, and reporting the fault in time to stop the compressor, making it convenient for users to know and take corresponding measures, thereby protecting the compressor intact and enhancing the user experience.

[0129] In addition, the present invention also provides a computer-readable storage medium.

[0130] The computer-readable storage medium of the present invention stores a valve blockage identification program, wherein when the valve blockage identification program is executed by a processor, the steps of the valve blockage identification method described above are implemented.

[0131] The method implemented when the valve blockage identification program is executed can refer to the various embodiments of the valve blockage identification method of the present invention, and will not be described in detail here.

[0132] It will be understood by those skilled in the art that embodiments of the present invention may be provided as methods, systems, or computer program products. Thus, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware. Furthermore, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0133] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowcharts and / or block diagrams, as well as combinations of processes and / or blocks in the flowcharts and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowcharts and / or block diagrams. Figure 1 a process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0134] These computer program instructions may also be stored in a computer readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 a process or multiple processes and / or boxes Figure 1 The function specified in one or more boxes.

[0135] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing the instructions executed on the computer or other programmable device for implementing the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0136] It should be noted that in the claims, any reference signs placed between parentheses shall not be construed as limiting the claims. The word "comprising" does not exclude the presence of components or steps not listed in the claim. The word "a" or "an" preceding a component does not exclude the presence of a plurality of such components. The invention can be implemented by means of hardware comprising several different components and by means of a suitably programmed computer. In a unit claim enumerating several means, several of these means may be embodied by one and the same item of hardware. The use of the words first, second, third etc. does not indicate any order. These words may be interpreted as names.

[0137] Although the preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0138] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made by using the contents of the present invention description and drawings under the inventive concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A valve blockage identification method, characterized in that: The valve blockage identification method is applied to an air conditioning system; the valve blockage identification method comprises the following steps: monitoring the operating condition of the compressor, and determining whether the compressor is in a preset stable state according to the operating condition; When the compressor is in a preset stable state, recording the steady-state return air temperature and the steady-state exhaust air temperature of the compressor at the current moment; Monitor the ambient temperature and the real-time return air temperature of the compressor, and obtain the initial return air temperature when the compressor is powered on; identifying whether a valve in the air conditioning system is clogged based on the steady-state return air temperature, the steady-state exhaust temperature, the ambient temperature, the real-time return air temperature, and the initial return air temperature; The step of identifying whether valve blockage occurs in the air conditioning system based on the steady-state return air temperature, the steady-state exhaust temperature, the external ambient temperature, the real-time return air temperature, and the initial return air temperature includes: Determining whether the steady-state return air temperature is greater than the external ambient temperature and the steady-state exhaust temperature is greater than a preset first temperature threshold; If the steady-state return air temperature is greater than the ambient temperature and the steady-state exhaust temperature is greater than a preset first temperature threshold, determining whether the difference between the real-time return air temperature and the initial return air temperature is greater than a preset second temperature threshold; If the difference between the real-time return air temperature and the initial return air temperature is greater than a preset second temperature threshold, it is determined that a valve blockage occurs in the air conditioning system.

2. The valve blockage identification method according to claim 1, characterized in that: The step of monitoring the operating condition of the compressor and determining whether the compressor is in a preset stable state according to the operating condition includes: Monitor the operating frequency of the compressor in real time to determine whether the operating frequency reaches a preset frequency; If the operating frequency reaches the preset frequency, the current value of the compressor is collected every preset period; Determining the current change values ​​of the adjacent cycle lengths according to the current values ​​collected at each preset cycle length; Determining whether the current change value is less than or equal to a preset first change threshold; If the current change value is less than or equal to a preset first change threshold, it is determined that the compressor is in a preset stable state.

3. The valve blockage identification method according to claim 2, characterized in that: After the step of determining whether the current change value is less than or equal to a preset first change threshold, the method further includes: If the current change value is greater than a preset first change threshold, determining whether the current change value is greater than a preset second change threshold, wherein the second change threshold is greater than the first change threshold; If the current change value is greater than a preset second change threshold, obtaining the operating time of the compressor after startup, and determining whether the operating time is greater than a preset stable time; If the operating time is greater than the preset stable time, it is determined that the compressor is in a preset stable state.

4. The valve blockage identification method according to any one of claims 1 to 3, characterized in that: After the step of identifying whether a valve blockage occurs in the air conditioning system, the method further includes: If it is determined that a valve blockage occurs in the air-conditioning system, the operation of the compressor is stopped and valve blockage fault information is output.

5. The valve blockage identification method according to claim 4, characterized in that: The step of outputting valve blockage fault information comprises: determining a user terminal connected to the air conditioning system; According to the terminal attributes of the user terminal, valve blockage fault information corresponding to the terminal attributes is sent to the user terminal.

6. An air conditioner, characterized in that: The air conditioner includes a processor, a memory, and a valve blockage identification program stored in the memory and executable by the processor, wherein when the valve blockage identification program is executed by the processor, the steps of the valve blockage identification method according to any one of claims 1 to 5 are implemented.

7. A computer-readable storage medium, characterized in that The computer-readable storage medium stores a valve blockage identification program, wherein when the valve blockage identification program is executed by a processor, the steps of the valve blockage identification method according to any one of claims 1 to 5 are implemented.

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