Equipment fault diagnosis methods and wet fume treatment equipment

Abstract

This application discloses a method for diagnosing equipment faults and a wet fume treatment device, belonging to the technical field of fault diagnosis for fume treatment equipment. The method includes: after the wet fume treatment device is started, acquiring the fan current, the electric field voltage of the adsorption electric field, and the water level information of the water tank; diagnosing the operating status of the fan, adsorption electric field, and water tank based on the fan current, electric field voltage, and water level information; determining the fan's operating status as faulty when the fan current exceeds a preset current threshold; determining the adsorption electric field as needing cleaning when the electric field voltage is below a preset voltage threshold; and determining the water tank's operating status as faulty when the water level remains at a preset high level for a preset duration. This application solves the technical problems of inaccurate and untimely monitoring of the operating status of wet fume treatment equipment, as well as high labor costs.

Description

Technical Field

[0001] This invention relates to the field of fault diagnosis technology for fume treatment equipment, and in particular to a fault diagnosis method for equipment and a wet fume treatment equipment. Background Technology

[0002] With increasingly stringent environmental protection requirements, the monitoring of the operational status of fume treatment equipment is receiving more and more attention from manufacturers and users, especially in restaurants, canteens, and central kitchens in large shopping malls. These facilities operate for long periods, handle large volumes of fumes, and malfunctions can affect a significant number of people, making it crucial to detect any abnormalities in the fume treatment equipment as soon as possible.

[0003] Conventional methods typically involve technicians periodically inspecting and maintaining the fume treatment equipment on-site, or on-site maintenance personnel manually monitoring the equipment's operation based on their experience. However, these methods generally only assess the equipment's operational status based on superficial observations, such as whether the equipment has started successfully, whether the fume emissions from the operating area (e.g., the kitchen) are normal, and whether the concentration of stagnant fumes in the room is excessive. This approach suffers from technical problems such as inaccurate and untimely monitoring of equipment operation status, and high labor costs. Summary of the Invention

[0004] The main purpose of this application is to provide a method for diagnosing equipment faults and a wet fume treatment device, which aims to solve the technical problems of inaccurate and untimely monitoring of equipment operating status and high labor costs in conventional technologies.

[0005] To achieve the above objectives, this application provides a method for diagnosing equipment faults. This method is applied to a wet fume treatment device, which includes a fan, an adsorption electric field, and a water tank. The method for diagnosing equipment faults includes:

[0006] After the wet fume treatment equipment is started, the fan current, the electric field voltage of the adsorption electric field, and the water level information of the water tank are obtained.

[0007] Based on the fan current, electric field voltage, and water level information, the working status of the fan, adsorption electric field, and water tank are diagnosed respectively.

[0008] If the fan current exceeds a preset current threshold, the fan's operating state is determined to be a fault state.

[0009] When the electric field voltage is less than a preset voltage threshold, the adsorption electric field is determined to be in a state to be cleaned.

[0010] If the water level remains at a preset high level for a preset duration, the working state of the water tank is determined to be a fault state.

[0011] Optionally, the wet fume treatment equipment further includes a water pump that draws water from the water tank into the circulation pipeline; the step of obtaining the fan current, the electric field voltage, and the water level information of the adsorption electric field includes:

[0012] Control the operation of the fan in the wet fume treatment equipment and dynamically monitor the fan current during operation;

[0013] Control the operation of the adsorption electric field of the wet fume treatment equipment and dynamically detect the electric field voltage of the adsorption electric field;

[0014] The water pump is controlled to operate and the water level information of the water tank is dynamically detected within a preset time period.

[0015] Optionally, the fault conditions of the fan include fan damage and blockage of the perforated plate or guide vane in the air duct where the fan is located;

[0016] The step of determining the operating state of the fan as a fault state when the fan current is greater than a preset current threshold includes:

[0017] If the fan current is greater than a preset current threshold, determine whether the fan's operating noise is greater than a preset noise threshold.

[0018] If the operating noise of the fan exceeds a preset noise threshold, the fan is determined to be in a damaged state.

[0019] If the operating noise of the fan is less than or equal to a preset noise threshold, then the working state of the fan is determined to be that the perforated plate or guide vane in the air duct where the fan is located is blocked.

[0020] Optionally, after the step of diagnosing the operating status of the fan, adsorption electric field, and water tank based on the fan current, electric field voltage, and water level information, the method further includes:

[0021] If the electric field voltage value is greater than or equal to a preset voltage threshold, then the number of discharges of the adsorption electric field is detected.

[0022] When the number of discharges per minute is detected to be greater than a first preset number, the preset step voltage of the electric field voltage is reduced to form a new electric field voltage, and it is continued to determine whether the electric field voltage is less than a preset voltage threshold.

[0023] When the number of discharges per hour is less than the second preset number, the preset step size voltage of the electric field voltage is increased to form a new electric field voltage value; wherein the first preset number is greater than the second preset number.

[0024] Optionally, the malfunctions of the water tank include: a damaged water pump and a damaged water filling solenoid valve;

[0025] When the water level remains at a preset high level for a preset duration, the steps to determine that the water tank is in a fault state include:

[0026] After the water level information reaches the preset high water level, the water pump is started to draw circulating water for oil fume cleaning from the water tank;

[0027] If the water level remains at a preset high level for a preset period of time after the water pump starts, the working state of the water tank is determined to be that the water pump is damaged.

[0028] If, within a preset time period after the water pump starts, the water level information is not at the preset high water level, the water tank's water filling solenoid valve is activated, and the water level information is detected to be not at the preset high water level, thus determining that the water tank's working state is that the water filling solenoid valve is damaged.

[0029] Optionally, before the step of obtaining the fan current, the electric field voltage, and the water level information of the water tank, the method further includes:

[0030] The drain solenoid valve of the water tank is activated, and within a preset time after the drain solenoid valve is activated, the water level information of the water tank is detected to see if it is at the preset water shortage level.

[0031] If the detected water level information of the water tank is not the preset water shortage level, then the working state of the water tank is determined to be that the drain solenoid valve is damaged.

[0032] If the detected water level information of the water tank is a preset water shortage level, then water is added to the water tank, and the steps of obtaining the fan current, the electric field voltage of the adsorption electric field, and the water level information of the water tank are executed.

[0033] Optionally, the wet fume treatment equipment further includes: a purifying agent tank; the method further includes:

[0034] After activating the water tank's water filling solenoid valve, if the water level information is detected to be at a preset high level, the process of adding purifying agent to the purifying agent tank is executed.

[0035] If the low-amount probe alarm of the purification agent tank is detected, the working status of the purification agent tank is determined to be low-amount.

[0036] Optionally, after performing the process of adding purification agent to the purification agent tank, the method further includes:

[0037] If the low agent probe of the purification agent tank does not alarm, the water pump is controlled to run for a preset test duration.

[0038] The process involves executing the step of activating the drain solenoid valve of the water tank, and within a preset time period after the drain solenoid valve is activated, detecting whether the water level information of the water tank is at a preset water shortage level.

[0039] Optionally, the method further includes:

[0040] After detecting the shutdown command of the wet fume treatment equipment, the drain solenoid valve of the water tank is closed, the water filling solenoid valve of the water tank is started, and when the water level information is detected to be a preset high water level, the water pump is turned off so that the circulating water flows back to the water tank and flows out from the overflow pipe of the water tank.

[0041] This application also provides a wet fume treatment device, the device comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, the computer program being configured to implement the steps of the device fault diagnosis method described above.

[0042] This application dynamically acquires the fan current, water level information, and electric field voltage of the fan, water tank, and adsorption electric field, respectively. It then analyzes each of these three parameters individually to diagnose the fault conditions of the wet fume treatment equipment. For example, if the fan, adsorption electric field, and water tank are all in a faulty state, the application promptly outputs information about the faults in the relevant components of the wet fume treatment equipment. By analyzing these three parameters, the application diagnoses the operating status of the wet fume treatment equipment, making it more accurate and closely aligned with actual operating conditions. It also eliminates the need for manual on-site inspections and testing, significantly reducing labor costs. Attached Figure Description

[0043] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0044] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0045] Figure 1 This is a schematic diagram of the frame structure of the fault diagnosis device for the wet fume treatment equipment involved in the embodiments of this application;

[0046] Figure 2A schematic diagram of the structure of the wet fume treatment device involved in the embodiments of this application;

[0047] Figure 3 This is a flowchart illustrating an embodiment of the equipment fault diagnosis method involved in the present application.

[0048] The purpose, features, and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0049] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0050] Reference Figure 1 , Figure 1 This is a schematic diagram of the frame structure of the wet fume treatment equipment involved in the embodiments of this application.

[0051] like Figure 1 As shown, the wet fume treatment equipment includes a fume treatment device and a fault diagnosis device. The fault diagnosis device may include: a processor 1001, such as a central processing unit (CPU), a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. The communication bus 1002 is used to establish communication between these components. The user interface 1003 may include a standard wired interface or a wireless interface. The network interface 1004 may optionally include a standard wired interface or a wireless interface. The memory 1005 may be a high-speed random access memory (RAM) or a stable non-volatile memory (NVM), such as a disk drive. Alternatively, the memory 1005 may be a storage device independent of the aforementioned processor 1001.

[0052] Those skilled in the art will understand that Figure 1 The structure shown does not constitute a limitation on the fault diagnosis device and may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0053] like Figure 1As shown, the memory 1005, which serves as a storage medium, may include an operating system, a data storage module, a network communication module, a user interface module, and computer programs.

[0054] exist Figure 1 In the fault diagnosis device shown, the network interface 1004 is mainly used for data communication with other devices; the user interface 1003 is mainly used for data interaction with the user; the processor 1001 and memory 1005 in the fault diagnosis device of this application can be set in the wet fume treatment equipment. The fault diagnosis device calls the computer program stored in the memory 1005 through the processor 1001 and executes the equipment fault diagnosis methods of the various embodiments provided in this invention.

[0055] This application also provides a method for diagnosing equipment faults, which is applied to wet fume treatment equipment. In some feasible embodiments, refer to... Figure 2 The wet fume treatment equipment includes a fan, a water tank, a water pump, a purifying agent tank, an adsorption electric field, and a dynamic separation screen. Furthermore, the wet fume treatment equipment is equipped with an air duct, at the inlet of which is a dynamic separation screen. The fan provides negative pressure to the air duct. A liquid droplet generation zone is located downwind of the dynamic separation screen in the air duct. The water tank and purifying agent tank provide circulating water and purifying agent to the liquid droplet generation zone, respectively. The water pump draws water from the water tank into the circulation pipeline. The circulating water and purifying agent mix in the liquid droplet generation zone to generate liquid droplets. An adsorption electric field is located downwind of the liquid droplet generation zone in the air duct.

[0056] After the fan starts, a negative pressure is formed in the duct. The fumes enter from the duct inlet. The dynamic separation screen rotates at high speed. When the fumes pass through the spokes of the dynamic separation screen, the large particles in the fumes are cut and collided by the high-speed moving spokes. The large particles are attached to the spokes, thus the dynamic separation screen performs primary filtration of large particles of fumes entering the duct.

[0057] Then, the oil fumes filtered through the primary filter enter the liquid foam generation zone. The liquid foam in the liquid foam generation zone washes the oil fumes with water to perform secondary filtration of medium-sized oil fumes. The circulating water carries away the liquid foam to clean the oil grease deposits in the oil fumes.

[0058] Furthermore, the oil fumes from the secondary filtration enter the adsorption electric field, where at least two electrode plates are positioned opposite each other on the side wall of the duct, forming a high-voltage area between the electrode plates. This allows the electrode plates to adsorb small particles of oil fumes as they flow through, thus completing the tertiary filtration of small particulate oil fumes.

[0059] Wet fume treatment equipment achieves purification of oil fumes through primary, secondary, and tertiary filtration.

[0060] In one embodiment of the equipment fault diagnosis method of this application, the equipment fault diagnosis method is applied to a wet fume treatment device, which includes: a fan, an adsorption electric field, and a water tank; see reference. Figure 3 The equipment fault diagnosis method includes:

[0061] Step S10: After the wet fume treatment equipment is started, acquire the fan current, the electric field voltage of the adsorption electric field, and the water level information of the water tank.

[0062] The equipment fault diagnosis method is applied to wet fume treatment equipment, which may include a fan, a water tank, and an adsorption electric field. Sensors for collecting various real-time parameters are installed in the fan, water tank, and adsorption electric field of the wet fume treatment equipment.

[0063] For example, sensors that collect various real-time parameters of integrated fume treatment equipment include:

[0064] (1) A voltage detection sensor connected to the power supply terminal of the adsorption electric field and used to detect the electric field voltage during the operation of the adsorption electric field;

[0065] (2) A water level sensor installed inside the water tank and used to sense the water level information of the remaining water in the tank;

[0066] (3) A fan current detection sensor connected to the power supply terminal of the fan and used to detect the fan current during fan operation.

[0067] Based on the above sensors, data is collected once at a preset time interval to dynamically obtain the electric field voltage of the adsorption electric field, the water level information of the water tank, and the fan current of the blower. For example, the preset time interval is 1 minute.

[0068] In some feasible embodiments, the wet fume treatment equipment further includes a water pump that draws water from the water tank into the circulation pipeline; step S10, obtaining the fan current, the electric field voltage of the adsorption electric field, and the water level information of the water tank, includes:

[0069] Step S11: Control the operation of the fan in the wet fume treatment equipment and dynamically detect the fan current during operation;

[0070] After the wet fume treatment equipment is powered on, the user triggers the start command. At this time, the fan controlling the wet fume treatment equipment starts to run. The fan draws air out of the air duct of the wet fume treatment equipment to form a negative pressure, and then draws air from the air inlet of the air duct. Simultaneously, the fan current is dynamically detected based on the fan current detection sensor.

[0071] Step S12: Control the operation of the adsorption electric field of the wet fume treatment equipment and dynamically detect the electric field voltage of the adsorption electric field;

[0072] When or after the fan starts, the adsorption electric field of the wet fume treatment equipment is energized and put into operation to adsorb the oil fume particles flowing through the adsorption electric field. Simultaneously, the electric field voltage of the adsorption electric field is dynamically detected based on the voltage detection sensor.

[0073] Step S13: Control the operation of the water pump to dynamically detect the water level information of the water tank within a preset duration.

[0074] For example, a wet fume treatment device includes a water level sensor installed in a water tank to sense the water level information of the remaining water in the tank; when or after the fan starts, the water pump is controlled to run, and the water pump draws water from the water tank into the circulation pipe, and simultaneously, the water level information of the remaining water in the tank is dynamically detected based on the water level sensor.

[0075] Thus, after the wet fume treatment equipment is powered on, the operation of the fan is controlled to dynamically detect the fan current, the operation of the adsorption electric field is controlled to dynamically detect the electric field voltage, and the operation of the water pump is controlled to dynamically detect the water level information of the water tank. This enables the dynamic acquisition of fan current, adsorption electric field voltage, and water level information, providing timely and accurate raw data for subsequent diagnosis of the working status of the fan, adsorption electric field, and water tank. This ensures that the diagnosis is accurate and relevant to reality, and also eliminates the need for manual intervention, reducing labor costs.

[0076] Step S20: Based on the fan current, electric field voltage, and water level information, diagnose the working status of the fan, adsorption electric field, and water tank respectively;

[0077] For example, based on a preset fan current analysis algorithm, the fan current is analyzed to determine the working state of the fan; based on a preset electric field voltage analysis algorithm, the electric field voltage of the adsorption electric field is analyzed to determine the working state of the adsorption electric field; based on a preset water volume and level analysis algorithm, the water level information of the water tank is analyzed to determine the working state of the water tank.

[0078] Step S31: When the fan current is greater than a preset current threshold, determine that the working state of the fan is a fault state.

[0079] For example, it is determined whether the fan current is greater than a preset current threshold. If the fan current is greater than the preset current threshold, it indicates that the fan is overloaded, the duct of the wet fume treatment equipment is likely blocked, and the fan is at risk of vacuuming or being overloaded. This may be due to blockage of the mesh plate or guide of the wet fume treatment equipment, or the airflow velocity in the duct being too low, preventing the fumes from being quickly drawn into the duct and discharged outdoors. In this case, the working state of the fan is determined to be a fault state.

[0080] Optionally, the fault states of the fan include fan damage and blockage of the perforated plate or guide vane in the air duct where the fan is located; step S31, when the fan current is greater than a preset current threshold, determines the operating state of the fan as a fault state, including:

[0081] Step S311: If the fan current is greater than a preset current threshold, determine whether the operating noise of the fan is greater than a preset noise threshold.

[0082] Step S312: If the operating noise of the fan is greater than a preset noise threshold, the working state of the fan is determined to be fan damage; if the operating noise of the fan is less than or equal to the preset noise threshold, the working state of the fan is determined to be blockage of the perforated plate or guide in the air duct where the fan is located.

[0083] When the fan current exceeds the preset current threshold, the fan is definitely in a faulty state. However, whether the fault lies with the fan itself or with external factors such as duct blockage requires further analysis based on the fan's operating noise. If the fan current exceeds the preset current threshold and the fan's operating noise exceeds the preset noise threshold, it indicates a high probability of bearing wear or fan damage requiring replacement. If the fan current exceeds the preset current threshold and the fan's operating noise is less than or equal to the preset noise threshold, it indicates that the fan itself is not faulty, and the problem is most likely duct blockage, primarily due to a blockage in the perforated plate or guide vane within the duct, requiring cleaning of the perforated plate or guide vane. If the fan current is less than or equal to the preset current threshold, it indicates that the fan is operating normally, and its working state is normal.

[0084] In this way, by using the primary judgment of the fan current and the secondary judgment of the fan operating noise, the more detailed and accurate causes of the fan failure can be determined more precisely, which is conducive to targeted solutions to the fan failure and ensures the accuracy of the fan failure diagnosis. No manual intervention is required, which reduces labor costs.

[0085] Step S32: When the electric field voltage is less than a preset voltage threshold, determine that the adsorption electric field is in a state to be cleaned.

[0086] For example, after obtaining the electric field voltage, the electric field voltage value is compared with the preset voltage threshold. If the electric field voltage is less than the preset voltage threshold, it indicates that the voltage between the two plates of the adsorption electric field is too small. Under this low voltage, the adsorption electric field can exert too little adsorption force on the oil fumes passing through the electric field, which greatly reduces the filtration effect of the adsorption electric field on the oil fumes passing through the interior. It is difficult to play the role of purifying oil fumes with the adsorption electric field. At this time, too much oil fumes are adsorbed on the adsorption electric field, resulting in the gap between the two plates of the adsorption electric field being too small. The working state of the adsorption electric field is the cleaning state.

[0087] Step S33: If the water level remains at a preset high level for a preset duration, determine that the working state of the water tank is a fault state.

[0088] If the water level remains at the preset high level for a preset duration, it indicates that after the water pump that draws water from the tank into the circulation pipe is turned on, the water level in the tank remains unchanged at the preset high level. This means that the water in the tank is not being supplied to the e-liquid treatment process normally, and the tank is in a fault state.

[0089] In this embodiment, the fan current, water level information, and electric field voltage of the fan, water tank, and adsorption electric field are dynamically acquired. These three parameters are then analyzed individually to diagnose the fault conditions of the wet fume treatment equipment. For example, if the fan, adsorption electric field, and water tank are all in a fault state, information about the faults in the relevant components of the wet fume treatment equipment is promptly output. This analysis of the three equipment parameters to diagnose the operating status of the wet fume treatment equipment is more consistent with actual operating conditions and more accurate. It also eliminates the need for manual on-site inspections and testing, significantly saving labor costs.

[0090] Furthermore, in another embodiment of the equipment fault diagnosis method of this application, after diagnosing the working status of the fan, adsorption electric field, and water tank respectively based on the fan current, electric field voltage, and water level information in step S20, the method further includes:

[0091] Step A1: If the electric field voltage is greater than or equal to a preset voltage threshold, then detect the number of discharges of the adsorption electric field.

[0092] Step A2: When the number of discharges per minute is detected to be greater than the first preset number, the preset step voltage of the electric field voltage is reduced to form a new electric field voltage, and it is determined whether the electric field voltage is less than a preset voltage threshold.

[0093] If the electric field voltage is greater than or equal to the preset voltage threshold, it indicates that the voltage between the two plates of the adsorption electric field is normal. Under this normal voltage, the adsorption electric field can exert an adsorption force on the oil fumes passing through the electric field and can adsorb the oil fumes. Then, it is further detected whether the number of discharges per minute of the adsorption electric field is greater than the first preset number (for example, the first preset number is 10 times).

[0094] Since the electric force between the two electrode plates of the adsorption electric field is directly proportional to the electric field voltage and inversely proportional to the distance between the two electrode plates, when the electric field voltage is within a preset reasonable range (i.e., greater than the preset voltage threshold), the distance between the two electrode plates continuously decreases as the electrode plates continuously adsorb small particles of oil fumes, and the electric force continuously increases, gradually increasing the probability of electrical discharge between the two electrode plates of the adsorption electric field. When the number of discharges per minute of the adsorption electric field is detected to be greater than the first preset number, it indicates that a certain thickness of small particles of oil fumes has been adsorbed on the electrode plates of the adsorption electric field. In order to avoid excessive equipment damage to the adsorption electric field caused by frequent electrode discharges, the preset step voltage of the electric field voltage (e.g., 200V) is reduced to form a new electric field voltage, and it is determined again whether the electric field voltage is less than the preset voltage threshold. This step of determining whether the electric field voltage is less than the preset voltage threshold is after step S20. The previous embodiment omitted the step of determining whether the electric field voltage is less than the preset voltage threshold.

[0095] As the electrode plates of the adsorption electric field continuously adsorb small particles of oil fumes, these particles accumulate on the relatively arranged electrode plates, causing the distance between the two electrode plates to decrease. This continuously increases the probability of electrical discharge between the two electrode plates of the adsorption electric field, thereby continuously triggering the condition that the number of discharges per minute in the adsorption electric field exceeds a first preset number. Then, the current operating voltage of the adsorption electric field is continuously reduced by a preset step voltage until the electric field voltage is less than a preset voltage threshold, at which point the adsorption electric field is determined to be in a state to be cleaned.

[0096] Step A3: When the number of discharges per hour is less than the second preset number, the preset step size voltage of the electric field voltage is increased to form a new electric field voltage; wherein, the first preset number is greater than the second preset number.

[0097] Furthermore, based on the condition that the number of discharges per minute of the adsorption electric field is greater than the first preset number, the current working electric field voltage of the adsorption electric field may be misjudged or affected by occasional random factors when reducing the voltage of the adsorption electric field with a preset step size. Therefore, in the process of detecting whether the number of discharges per minute of the adsorption electric field is greater than the first preset number, it is simultaneously detected whether the number of discharges per hour of the adsorption electric field is less than the second preset number (for example, if the second preset number is 1, it means detecting whether the number of discharges per hour of the adsorption electric field is 0).

[0098] If the number of discharges per hour is less than the second preset number, it indicates that the electrode plates of the adsorption electric field have hardly experienced any electrical discharge. The working voltage of the adsorption electric field can be appropriately increased to increase the electric field force between the electrode plates, thereby increasing the adsorption capacity for small particulate oil fumes passing through the adsorption electric field. Simultaneously, the number of discharges per minute of the adsorption electric field is dynamically detected to be greater than the first preset number, and the number of discharges per hour of the adsorption electric field is dynamically detected to be less than the second preset number. This allows for dynamic correction of the working electric field voltage value of the adsorption electric field, maintaining the working electric field voltage value of the adsorption electric field above the preset voltage threshold without being too high and causing frequent electrical discharges. This maximizes the electric field force of the electrode plates working in the adsorption electric field to ensure the adsorption of small particulate oil fumes.

[0099] Furthermore, in another embodiment of the equipment fault diagnosis method of this application, the fault state of the water tank includes: water pump failure and water filling solenoid valve failure; step S33, when the water level information remains at a preset high water level for a preset duration, determines the working state of the water tank as a fault state, including:

[0100] Step S331: After the water level information is at the preset high water level, start the water pump to extract circulating water for oil fume cleaning from the water tank.

[0101] Step S332: If the water level information remains at a preset high level within a preset time period after the water pump is started, the working state of the water tank is determined to be that the water pump is damaged.

[0102] For example, after determining that the water level in the tank is at the preset high level, indicating that the tank is full, the water pump is started for the first time or restarted to draw water from the tank into the circulation pipe, thus forming circulating water for oil fume cleaning. Specifically, after the water passes through the circulation pipe, it mixes with the purifying agent and reaches the liquid foam generation area in the air duct to filter and clean the passing oil fume mixture. The water mixed with the oil fume continues to circulate in the circulation pipe as circulating water.

[0103] If the water level remains at the preset high level after the water pump has been running for a preset time, it indicates that the water pump has not successfully pumped water into the circulation pipeline. At this point, it is determined that the water pump is damaged, allowing for a more detailed analysis of the cause of the water tank malfunction.

[0104] Step S333: If the water level information is not at the preset high water level within a preset time after the water pump starts, the water filling solenoid valve of the water tank is activated, and the water level information is detected to be not at the preset high water level, thus determining that the working state of the water tank is that the water filling solenoid valve is damaged.

[0105] If the water level is not at the preset high level after the water pump has been running for a preset time, it indicates that the water pump is pumping water into the circulation pipeline normally. At this time, the water filling solenoid valve that controls the opening and closing of the water tank filling pipeline is activated to add water to the water tank. If the water level is not at the preset high level after the water filling solenoid valve has been open for a period of time, it indicates that water filling through the water filling solenoid valve has failed. At this time, it is determined that the working state of the water tank is that the water filling solenoid valve is damaged, so as to further distinguish the detailed reasons for the working state of the water tank as a fault state.

[0106] For example, the water level information of the water tank is preset to a high water level of 50L. After the water pump starts, it draws 5L of water into the circulation pipeline as circulating water. At this time, the water level information of the water tank is 45L. Then, the water filling solenoid valve of the water tank is started. If the water filling solenoid valve is not damaged and starts successfully, the water tank is filled with water, and the water level information is the preset high water level of 50L. If the water filling solenoid valve is damaged and starts unsuccessfully, the water volume in the water tank remains unchanged, and the water level information is still 45L. At this time, it is determined that the working state of the water tank is that the water filling solenoid valve is damaged.

[0107] Optionally, before obtaining the fan current, adsorption electric field voltage, and water level information of the water tank in step S10, the method further includes:

[0108] Step B1: Activate the drain solenoid valve of the water tank. Within a preset time after the drain solenoid valve is activated, detect whether the water level information of the water tank is at the preset water shortage level.

[0109] Step B2: If the water level information of the water tank is not the preset water shortage level, then the working state of the water tank is determined to be that the drain solenoid valve is damaged.

[0110] Step B3: If the water level information of the water tank is a preset water shortage level, then add water to the water tank and execute the steps of obtaining the fan current, the electric field voltage of the adsorption electric field, and the water level information of the water tank.

[0111] Before using wet fume treatment equipment for fume treatment, it is generally necessary to drain and refill the water tank. At this time, the drain solenoid valve of the water tank is activated to drain any remaining water. Simultaneously, within a preset time (e.g., 10 minutes) after the drain solenoid valve is activated, the water level in the tank is checked to see if it reaches the preset low-water level. If the water level is not at the preset low-water level, it indicates that the residual water in the tank has not been drained, the drain solenoid valve is damaged, and the water tank's operating status is determined to be a drain solenoid valve malfunction. If the water level is at the preset low-water level, it indicates that the residual water in the tank has been successfully drained, and the tank can be refilled. Then, step S10 is executed to obtain the fan current, the electric field voltage of the adsorption electric field, and the water level information of the tank. This adds a diagnostic feature regarding drain solenoid valve malfunction, further refining the cause of the water tank's operating status as a faulty state.

[0112] Optionally, the wet fume treatment equipment further includes: a purifying agent tank; the method further includes:

[0113] Step C1: After activating the water filling solenoid valve of the water tank, if the water level information is detected to be at a preset high water level, the process of adding purifying agent to the purifying agent tank is executed.

[0114] A purification agent level sensor (such as a low agent probe) is installed in the purification agent tank to sense the remaining purification agent level in the tank.

[0115] Step C2: If the low-resource probe alarm of the purification agent tank is detected, determine that the working state of the purification agent tank is low-resource state.

[0116] After activating the water tank's solenoid valve, if the water level is detected at the preset high level, it indicates the tank is full and the water pump is ready to draw circulating water. Adding purifying agent to the purifying agent tank begins. If the purifying agent level is below the preset minimum level, it indicates insufficient remaining purifying agent, making it difficult to continuously supply purifying agent for the wet fume treatment equipment, posing a risk of reduced fume purification effect. In this case, the purifying agent level sensor alarms, confirming the purifying agent tank's operating status as low on purifying agent. If the purifying agent level is greater than or equal to the preset minimum level, it indicates sufficient remaining purifying agent, and the purifying agent tank is operating normally. Thus, based on the purifying agent level sensor and purifying agent level, dynamic monitoring of the remaining purifying agent in the tank is achieved, promptly detecting low levels and confirming the purifying agent tank's operating status as low on purifying agent, completing the diagnosis of low-purifying agent status.

[0117] Optionally, after performing the step of adding purification agent to the purification agent tank in step C1, the method further includes:

[0118] Step D1: If the low agent probe of the purification agent tank does not alarm, control the water pump to run for a preset test duration.

[0119] In step B1, the drain solenoid valve of the water tank is activated, and within a preset time after the drain solenoid valve is activated, the water level information of the water tank is detected to see if it is at the preset water shortage level.

[0120] If the desiccant level probe in the desiccant tank does not alarm, it indicates that the desiccant in the tank is sufficient, and the water pump can be started to draw circulating water into the circulation pipeline. At this time, the water pump is controlled to start for a preset test time (e.g., 30 minutes) to clean the circulation pipeline, removing any residual desiccant or oil fume from the previous use. Then, the drain solenoid valve of the water tank is activated to drain the water and replace the water in the tank. After the drain solenoid valve is activated, within a preset time, step B1 is executed to activate the drain solenoid valve of the water tank. Within the preset time after the drain solenoid valve is activated, the water level information of the water tank is checked to see if it is at the preset low water level, and subsequent steps are executed according to the detection results.

[0121] Optionally, in another embodiment of the equipment fault diagnosis method of this application, the method further includes:

[0122] Step E: After detecting the shutdown command of the wet fume treatment equipment, close the drain solenoid valve of the water tank, start the water filling solenoid valve of the water tank, and when the water level information is detected to be a preset high water level, turn off the water pump so that the circulating water flows back to the water tank and flows out from the overflow pipe of the water tank.

[0123] After the user triggers the stop control of the wet fume treatment equipment, the control device will detect the stop command. At this time, it will close the drain solenoid valve of the water tank and start the water filling solenoid valve to fill the water tank to full, for example, 50L. The water level information of the water tank is set to the preset high water level. Then, the water pump will be turned off. The circulating water in the circulation pipeline will flow back into the water tank without the pump driving it. At the same time, the returning circulating water will carry the condensed oil fume particles after being cleaned by the purification agent back into the water tank. Since the water tank is full at this time, the mixture of returning circulating water and oil fume particles will flow out from the overflow pipe of the water tank. Since the density of oil fume particles is less than that of water, the returning oil fume particles will also be discharged through the overflow pipe. For example, the inlet of the overflow pipe is set at a preset small distance above the full water level of the water tank. After the water level in the water tank exceeds the preset high water level, the excess water will be discharged through the overflow pipe. Therefore, after shutting down the wet fume treatment equipment, ensure that the fume blocks and return water are discharged in a timely manner to reduce pollution of the water tank and reduce the probability of water tank failure.

[0124] This application also provides a wet fume treatment device, the device comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, the computer program being configured to implement the steps of the device fault diagnosis method described above.

[0125] The technical extension and derivation of the wet fume treatment equipment in this application are basically the same as the embodiments of the equipment fault diagnosis method described above, so they will not be repeated here.

[0126] The above are merely preferred embodiments of this application and do not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent scope of this application.

Claims

1. A method for diagnosing equipment faults, characterized in that, The equipment fault diagnosis method is applied to wet fume treatment equipment, which includes: a fan, an adsorption electric field, and a water tank; the equipment fault diagnosis method includes: After the wet fume treatment equipment is started, the fan current, the electric field voltage of the adsorption electric field, and the water level information of the water tank are obtained. Based on the fan current, electric field voltage, and water level information, the working status of the fan, adsorption electric field, and water tank are diagnosed respectively. If the electric field voltage is greater than or equal to a preset voltage threshold, then the number of discharges of the adsorption electric field is detected; When the number of discharges per minute is detected to be greater than a first preset number, the preset step voltage of the electric field voltage is reduced to form a new electric field voltage, and it is continued to determine whether the electric field voltage is less than a preset voltage threshold. If the fan current exceeds a preset current threshold, the fan's operating state is determined to be a fault state. When the electric field voltage is less than a preset voltage threshold, the adsorption electric field is determined to be in a state to be cleaned. If the water level remains at a preset high level for a preset duration, the working state of the water tank is determined to be a fault state. The steps of obtaining the fan current during operation of the fan, the electric field voltage during operation of the adsorption electric field, and the water level information of the water tank include: Control the operation of the adsorption electric field of the wet fume treatment equipment and dynamically detect the electric field voltage of the adsorption electric field.

2. The equipment fault diagnosis method as described in claim 1, characterized in that, The wet fume treatment equipment also includes a water pump that draws water from the water tank into the circulation pipeline; the steps of obtaining the fan current, the electric field voltage, and the water level information of the adsorption electric field and the water tank include: Control the operation of the fan in the wet fume treatment equipment and dynamically monitor the fan current during operation; The water pump is controlled to operate and the water level information of the water tank is dynamically detected within a preset time period.

3. The equipment fault diagnosis method as described in claim 2, characterized in that, The fault conditions of the fan include fan damage and blockage of the perforated plate or guide vane in the air duct where the fan is located. The step of determining the operating state of the fan as a fault state when the fan current is greater than a preset current threshold includes: If the fan current is greater than a preset current threshold, determine whether the fan's operating noise is greater than a preset noise threshold. If the operating noise of the fan exceeds a preset noise threshold, the fan is determined to be in a damaged state. If the operating noise of the fan is less than or equal to a preset noise threshold, then the working state of the fan is determined to be that the perforated plate or guide vane in the air duct where the fan is located is blocked.

4. The equipment fault diagnosis method as described in claim 3, characterized in that, After the step of detecting the number of discharges in the adsorption electric field, the method further includes: When the number of discharges per hour is less than the second preset number, the preset step size voltage of the electric field voltage is increased to form a new electric field voltage value; wherein the first preset number is greater than the second preset number.

5. The equipment fault diagnosis method as described in claim 4, characterized in that, The malfunctions of the water tank include: a damaged water pump and a damaged water filling solenoid valve; When the water level remains at a preset high level for a preset duration, the steps to determine that the water tank is in a fault state include: After the water level information reaches the preset high water level, the water pump is started to draw circulating water for oil fume cleaning from the water tank; If the water level remains at a preset high level for a preset period of time after the water pump starts, the working state of the water tank is determined to be that the water pump is damaged. If, within a preset time period after the water pump starts, the water level information is not at the preset high water level, the water tank's water filling solenoid valve is activated, and the water level information is detected to be not at the preset high water level, thus determining that the water tank's working state is that the water filling solenoid valve is damaged.

6. The equipment fault diagnosis method as described in claim 5, characterized in that, Before the steps of obtaining the fan current, the electric field voltage, and the water level information of the adsorption electric field, the method further includes: The drain solenoid valve of the water tank is activated, and within a preset time after the drain solenoid valve is activated, the water level information of the water tank is detected to see if it is at the preset water shortage level. If the water level information of the water tank is not the preset water shortage level, then the working state of the water tank is determined to be that the drain solenoid valve is damaged. If the water level information of the water tank is a preset water shortage level, then water is added to the water tank, and the steps of obtaining the fan current, the electric field voltage of the adsorption electric field, and the water level information of the water tank are executed.

7. The equipment fault diagnosis method as described in claim 6, characterized in that, The wet fume treatment equipment further includes: a purifying agent tank; the method further includes: After activating the water tank's water filling solenoid valve, if the water level information is detected to be at a preset high level, the process of adding purifying agent to the purifying agent tank is executed. If the low-amount probe alarm of the purification agent tank is detected, the working status of the purification agent tank is determined to be low-amount.

8. The equipment fault diagnosis method as described in claim 7, characterized in that, After performing the process of adding purification agent to the purification agent tank, the method further includes: If the low agent probe of the purification agent tank does not alarm, the water pump is controlled to run for a preset test duration. The step involves executing the step of activating the drain solenoid valve of the water tank, and within a preset time period after the drain solenoid valve is activated, detecting whether the water level information of the water tank is at the preset water shortage level.

9. The equipment fault diagnosis method as described in claim 7, characterized in that, The method further includes: After detecting the shutdown command of the wet fume treatment equipment, the drain solenoid valve of the water tank is closed, the water filling solenoid valve of the water tank is started, and when the water level information is detected to be a preset high water level, the water pump is turned off so that the circulating water flows back to the water tank and flows out from the overflow pipe of the water tank.

10. A wet fume treatment device, characterized in that, The device includes: a memory, a processor, and a computer program stored in the memory and executable on the processor, the computer program being configured to implement the steps of the device fault diagnosis method as described in any one of claims 1 to 9.

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