Method and device for failure recovery control of an ink supply circuit

Abstract

The embodiment of the application discloses a kind of fault recovery control method and device for ink supply circuit, ink supply circuit includes ink return cavity, diaphragm pump and ink inlet chamber, ink return cavity is communicated with the inlet side of diaphragm pump, and the outlet side of diaphragm pump is communicated with ink inlet chamber;The method comprises: when ink supply circuit is in the state of blockage, control diaphragm pump reverse operation first preset time, then control diaphragm pump forward operation;Pulse positive pressure is applied to ink inlet chamber.The technical scheme of the embodiment of the application solves the problem that manual reverse dredging is inefficient and damages equipment, and lag processing can easily produce batch defects, without manual intervention, dredging recovery can be completed, and the continuity of ink supply system operation is improved.

Description

Technical Field

[0001] This invention relates to the field of photovoltaic cell inkjet printing technology, and in particular to a fault recovery control method and device for an ink supply circuit. Background Technology

[0002] In the manufacturing process of photovoltaic cells, diaphragm pumps are typically used to deliver functional varnishes with a certain viscosity, such as insulating inks used for local insulation or protection. The viscosity of the insulating ink at 25°C is approximately 90 mPa·s, which makes it extremely prone to jamming at the inlet and outlet check valves of the diaphragm pump or forming air pockets within the pump chamber, leading to pumping interruption and flow instability.

[0003] Currently, when encountering jamming or air blockage, on-site operators generally use a temporary "plug swapping" method to handle the situation. This involves manually unplugging the diaphragm pump motor plug and swapping the positive and negative terminals to briefly reverse the diaphragm pump, thereby using the reverse pressure to open the jammed valve ball or expel the gas in the chamber.

[0004] However, with current technology, operators only intervene when printing defects such as "broken lines" or "missing prints" caused by unstable liquid supply appear on the photovoltaic cells and are identified as defective by automated optical inspection equipment. This significantly reduces the production line yield. Furthermore, the manual plugging and unplugging of power cords lacks standardization; the duration of reversing the positive and negative terminals depends entirely on the operator's feel and experience. If the reversal time is too short, it cannot effectively vent air or clear blockages; if the reversal time is too long, it can easily damage the diaphragm inside the pump. Summary of the Invention

[0005] This invention provides a fault recovery control method and device for ink supply circuits to solve the problems of inefficient manual reverse unblocking damaging equipment and delayed processing easily causing batch defects.

[0006] According to one aspect of the present invention, a fault recovery control method for an ink supply circuit is provided, the ink supply circuit including an ink return chamber, a diaphragm pump, and an ink inlet chamber, the ink return chamber being connected to the inlet side of the diaphragm pump, and the outlet side of the diaphragm pump being connected to the ink inlet chamber; the method includes: When the ink supply circuit is blocked, the diaphragm pump is controlled to run in reverse for a first preset time, and then the diaphragm pump is controlled to run in forward. Apply pulsed positive pressure to the ink inlet chamber.

[0007] Optionally, when the ink supply circuit is blocked, after controlling the diaphragm pump to run in reverse for a first preset time and before controlling the diaphragm pump to run in the forward direction, the method further includes: During the forward operation of the diaphragm pump, the operating status parameters of the ink supply circuit are acquired; Determine whether the operating status parameters are in an abnormal state based on the operating status parameters; When the operating status parameters are in an abnormal state, the blockage status of the ink supply circuit is determined based on the duration of the abnormal state.

[0008] Optionally, the operating status parameters include the flow rate of the ink supply circuit; Determining whether the operating status parameters are in an abnormal state based on the operating status parameters includes: When the flow rate of the ink supply circuit is less than a preset flow rate threshold, the operating status parameter is determined to be in an abnormal state.

[0009] Optionally, the operating status parameters include the operating current of the diaphragm pump motor; Determining whether the operating status parameters are in an abnormal state based on the operating status parameters includes: If the operating current of the diaphragm pump motor is greater than a preset current threshold, the operating status parameter is determined to be in an abnormal state.

[0010] Optionally, when the operating status parameter is in an abnormal state, the blockage state of the ink supply circuit is determined based on the duration of the abnormal state, including: When the operating status parameter is in an abnormal state and the duration of the abnormal state is greater than or equal to a second preset time, it is determined that the ink supply circuit is in a blocked state.

[0011] Optionally, the second preset time is 3 to 5 seconds.

[0012] Optionally, the first preset time is 2 to 4 seconds.

[0013] Optionally, after applying pulsed positive pressure to the ink inlet chamber, the following steps are also included: The number of consecutive executions of the diaphragm pump reversing and applying pulsed positive pressure is obtained; When the number of consecutive executions exceeds a first preset number, the ink supply circuit is determined to be an unrecoverable fault.

[0014] Optionally, a pulsed positive pressure is applied to the ink inlet chamber, including: The peak pressure of the pulsed positive pressure is controlled to be less than or equal to a first preset pressure; The duration of a single pressurization is controlled to be less than or equal to a third preset time, and the interval between two adjacent pressurizations is a fourth preset time.

[0015] According to another aspect of the present invention, a fault recovery control device for an ink supply circuit is also provided, the ink supply circuit including an ink return chamber, a diaphragm pump, and an ink inlet chamber, the ink return chamber being connected to the inlet side of the diaphragm pump, and the outlet side of the diaphragm pump being connected to the ink inlet chamber; the device includes: The diaphragm pump control module is used to control the diaphragm pump to run in reverse for a first preset time when the ink supply circuit is blocked, and then control the diaphragm pump to run in forward. The pressure control module is used to apply pulsed positive pressure to the ink inlet chamber.

[0016] The technical solution of this invention addresses the problem of ink blockage in the ink supply circuit. First, the diaphragm pump is controlled to run in reverse for a preset time, then it is controlled to run in the forward direction. Reverse operation reverses the ink flow, preventing the blockage from worsening due to unidirectional pressure. Forward operation removes loosened impurities or air bubbles from the circuit. Furthermore, applying pulsed positive pressure to the ink inlet chamber further facilitates the removal of air bubbles and prevents continuous high pressure from damaging the diaphragm pump. This invention solves the problems of inefficient manual reverse unblocking damaging equipment and delayed processing leading to batch defects. Unblocking and restoration can be completed without manual intervention, improving the continuity of the ink supply system.

[0017] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of the present invention, nor is it intended to limit the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of an ink supply circuit provided in an embodiment of the present invention; Figure 2 This is a flowchart of a fault recovery control method for an ink supply circuit provided in an embodiment of the present invention; Figure 3 This is a flowchart of another ink supply circuit fault recovery control method provided in an embodiment of the present invention; Figure 4 This is a flowchart of another fault recovery control method for an ink supply circuit provided in an embodiment of the present invention; Figure 5 This is a flowchart of a fault recovery control method for an ink supply circuit provided in an embodiment of the present invention; Figure 6 This is a schematic diagram of the structure of a fault recovery control device for an ink supply circuit provided in an embodiment of the present invention. Detailed Implementation

[0020] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0021] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0022] Figure 1 This is a schematic diagram of an ink supply circuit provided in an embodiment of the present invention. Figure 2 This is a flowchart of a fault recovery control method for an ink supply circuit provided in an embodiment of the present invention, as shown below. Figure 1 As shown, the ink supply circuit includes an ink return chamber 101, a diaphragm pump 102, and an ink inlet chamber 103. The ink return chamber 101 is connected to the inlet side of the diaphragm pump 102, and the outlet side of the diaphragm pump 102 is connected to the ink inlet chamber 103. This method can be executed by a fault recovery control device for the ink supply circuit, which can be implemented in hardware and / or software. Figure 2 As shown, the method includes: S110. When the ink supply circuit is blocked, after controlling the diaphragm pump 102 to run in reverse for a first preset time, control the diaphragm pump 102 to run in forward. The ink inlet chamber 103 stores ink and delivers it to the printhead 104. The ink return chamber 101 recovers the returned ink. The diaphragm pump 102 is driven by a DC brushed or brushless motor. When the diaphragm pump 102 is working normally, ink flows from the ink return chamber 101 into the ink inlet chamber 103 via the diaphragm pump 102. In some embodiments, the ink supply circuit may also be referred to as the ink supply system. The ink supply system in this embodiment is a dual-chamber circulating ink supply architecture, but it is not limited to this structure. Any ink supply circuit with a unidirectional pump and a positive pressure injection interface can be used with the fault recovery control method of the ink supply circuit of this invention. The ink includes, but is not limited to, photovoltaic isolation ink. It can be widely used in functional inks with similar fluid properties in the photovoltaic and semiconductor manufacturing fields, such as all-back-contact (ABC) / back-contact (BC) battery isolation adhesive ink, metallized conductive inks such as silver paste / copper paste, and perovskite precursor inks. The ink supply system also includes a printhead 104, a PLC controller 106, a polarity switching unit 105, and a parameter detection module 107. The printhead 104 is used for inkjet printing. The parameter detection module 107 can detect the operating parameters of the ink supply circuit. The PLC controller 106 can determine whether the ink supply circuit is blocked based on the detected operating parameters. At the same time, the PLC controller 106 can send a control signal to the polarity switching unit 105 to control the forward or reverse operation of the diaphragm pump 102. The polarity switching unit 105 can control the diaphragm pump to operate in the forward or reverse direction based on the control signal. The polarity switching unit 105 can be a relay or a motor drive circuit. The PLC controller 106 controls the relay to switch the positive and negative power supply circuits of the diaphragm pump 102 motor, avoiding the risk of electrical short circuits that may be caused by manual plugging and unplugging.

[0023] When the ink supply circuit is blocked, the diaphragm pump 102 is controlled to run in reverse, instantly generating a reverse negative pressure inside the pump chamber. This utilizes the fluid's backlash to actively disrupt the blocked one-way valve and burst air bubbles. After the diaphragm pump 102 runs in reverse for a first preset time, it resumes forward operation, restoring normal circulation. The first preset time can be the maximum allowable time for the diaphragm pump to run in reverse. This first preset time must ensure sufficient reverse fluid impact force during reverse operation while avoiding component wear and reduced lifespan due to prolonged reverse operation, thus extending the diaphragm pump's service life. For example, the first preset time can be set to 3 seconds. When the ink supply circuit is blocked, the diaphragm pump is controlled to run in reverse for 3 seconds before switching back to forward operation. This avoids the existing technology's approach of requiring equipment shutdown, manual intervention for troubleshooting and repair, and repeated plugging and unplugging of tubing for trial and error when the ink supply circuit becomes blocked.

[0024] S120, apply pulsed positive pressure to the ink inlet chamber 103.

[0025] This involves applying pulsed positive pressure to the ink inlet chamber, which, in conjunction with a forward-rotating diaphragm pump, refills the ink. Pulsed positive pressure refers to periodically alternating pressure changes, for example, applying pressure every 3 seconds for 10 seconds. Pulsed positive pressure more easily removes air bubbles or viscous ink, while avoiding ink leakage from the printhead caused by prolonged constant pressure.

[0026] The technical solution of this invention addresses the problem of ink blockage in the ink supply circuit. First, the diaphragm pump is controlled to run in reverse for a preset time, then it is controlled to run in the forward direction. Reverse operation reverses the ink flow, preventing the blockage from worsening due to unidirectional pressure. Forward operation removes loosened impurities or air bubbles from the circuit. Furthermore, applying pulsed positive pressure to the ink inlet chamber further facilitates the removal of air bubbles and prevents continuous high pressure from damaging the diaphragm pump. This invention solves the problems of inefficient manual reverse unblocking damaging equipment and delayed processing leading to batch defects. Unblocking and restoration can be completed without manual intervention, improving the continuity of the ink supply system.

[0027] Figure 3 This is a flowchart of another ink supply circuit fault recovery control method provided by an embodiment of the present invention. In some optional embodiments of the present invention, refer to... Figure 2 and Figure 3 Based on the above embodiments, further refinement is achieved by adding S210, after controlling the diaphragm pump to run in reverse for a first preset time and before controlling the diaphragm pump to run in the forward direction when the ink supply circuit is blocked, and before controlling the diaphragm pump to run in the forward direction. S220 involves acquiring the operating status parameters of the ink supply circuit during the forward operation of the diaphragm pump; S230 involves determining whether the operating status parameters are in an abnormal state based on the operating status parameters; and S24 involves determining the blockage state of the ink supply circuit based on the duration of the abnormal state when the operating status parameters are in an abnormal state. The refined method includes: S210. During the forward operation of the diaphragm pump, acquire the operating status parameters of the ink supply circuit; Among them, reference Figure 1 When the ink supply system is working normally, the diaphragm pump 102 operates in the forward direction, sending ink from the return ink chamber 101 into the inlet ink chamber 103. During the forward operation of the diaphragm pump 102, the system is in normal ink feeding. The parameter detection module 107 monitors the operating status parameters of the ink supply circuit in real time, and the PLC controller 106 determines whether the ink supply circuit is blocked based on these parameters. Operating status parameters may include flow rate, pressure, diaphragm pump motor current, and speed.

[0028] S220. Determine whether the operating status parameters are in an abnormal state based on the operating status parameters; Specifically, the real-time monitored operating status parameters of the ink supply circuit are compared with preset thresholds to determine whether the operating parameters are in an abnormal state. For example, if the operating status parameter is the flow rate of the ink supply circuit, it is determined that the operating parameter is in an abnormal state when the flow rate of the ink supply circuit is lower than the preset flow rate value.

[0029] S230. When the operating status parameters are in an abnormal state, determine the blockage status of the ink supply circuit based on the duration of the abnormal state.

[0030] Brief abnormal fluctuations may not indicate a true blockage. To avoid misjudgment, the duration of the abnormal state can be monitored. If the duration of the abnormal state exceeds a certain preset time threshold, it is determined that the ink supply circuit is blocked. Blockage in the ink supply circuit can include air blockage or jamming. Air blockage refers to air accumulation in the ink supply circuit, forming an air resistance that prevents ink from being delivered. Jamming refers to high-viscosity ink drying and impurity accumulation, which jams the one-way valve core, causing the valve to malfunction.

[0031] S110. When the ink supply circuit is blocked, control the diaphragm pump to run in reverse for a first preset time, and then control the diaphragm pump to run in forward. S120: Apply pulsed positive pressure to the ink inlet chamber.

[0032] In some optional embodiments of the present invention, the operating status parameters include the flow rate of the ink supply circuit; Determine whether the running status parameters are in an abnormal state based on the running status parameters, including: When the flow rate in the ink supply circuit is less than the preset flow rate threshold, the operating status parameters are determined to be in an abnormal state.

[0033] The flow rate in the ink supply circuit can be detected by a flow meter. The flow rate reflects whether the ink supply circuit is unobstructed. When the ink supply circuit is working normally, the diaphragm pump operates at a stable speed, maintaining a normal ink flow rate. If a blockage occurs, the ink flow is obstructed, and the flow rate will decrease. The preset flow rate threshold can be the minimum allowable flow rate value of the system. During the forward operation of the diaphragm pump, the flow meter continuously monitors the actual flow rate in the ink supply circuit. When the actual flow rate is less than the preset flow rate threshold, the operating status parameters are determined to be in an abnormal state.

[0034] In some optional embodiments of the present invention, the operating status parameters include the operating current of the diaphragm pump motor; Determine whether the running status parameters are in an abnormal state based on the running status parameters, including: When the operating current of the diaphragm pump motor exceeds the preset current threshold, the operating status parameters are determined to be in an abnormal state.

[0035] The diaphragm pump is driven by a motor. When the diaphragm pump is operating normally, the motor output torque overcomes pipeline resistance and propels the ink circulation. When the ink supply circuit becomes blocked, the resistance the diaphragm pump needs to overcome increases. To maintain its speed, the motor increases its output torque, leading to an increase in current. The preset current threshold can be the system's maximum allowable current value. During the forward operation of the diaphragm pump, the operating current of the diaphragm pump motor is continuously sampled. When the operating current of the diaphragm pump motor exceeds the preset current threshold, the operating status parameters are determined to be in an abnormal state.

[0036] In some optional embodiments of the present invention, when the operating status parameters are in an abnormal state, the blockage state of the ink supply circuit is determined based on the duration of the abnormal state, including: If the operating status parameters are in an abnormal state and the duration of the abnormal state is greater than or equal to the second preset time, it is determined that the ink supply circuit is blocked.

[0037] Specifically, after determining that the operating parameters are in an abnormal state based on the flow rate of the ink supply circuit or the operating current of the diaphragm pump motor, the ink supply circuit is only considered blocked if the abnormal state lasts for a duration greater than or equal to a second preset time, thus eliminating accidental interference. Setting the second preset time too short may falsely trigger start-stop transients; setting it too long may miss the optimal self-recovery opportunity, increasing the failure rate. For example, the second preset time could be 3 seconds. The diaphragm pump runs in the forward direction, monitoring the ink supply circuit flow rate in real time. Timing begins when the flow rate drops below a preset flow rate threshold. If the flow rate returns to normal after 1 second, a blockage is not determined. If the flow rate remains below the preset flow rate threshold for 3 seconds, the ink supply circuit is determined to be blocked, and recovery actions such as reverse operation are performed.

[0038] In some optional embodiments of the present invention, the second preset time is 3 to 5 seconds.

[0039] The second preset time can be 3 to 5 seconds. Only when the operating parameters of the ink supply circuit are abnormal and the duration of the abnormal state reaches 3 to 5 seconds or more, is it determined that the ink supply circuit is blocked and the fault recovery operation is initiated.

[0040] In some optional embodiments of the present invention, the first preset time is 2 to 4 seconds.

[0041] The first preset time is the reverse running time of the diaphragm pump. When the ink supply circuit is determined to be blocked, the diaphragm pump is controlled to reverse for 2-4 seconds before switching back to normal forward operation.

[0042] Figure 4 This is a flowchart of another fault recovery control method for an ink supply circuit provided by an embodiment of the present invention. It is a further refinement based on the above embodiments, as shown in the following figure. Figure 2 and Figure 4After applying pulsed positive pressure to the ink inlet chamber in step S120, step S310 is added to obtain the number of consecutive executions of the diaphragm pump reversing and applying pulsed positive pressure; and step S320 is added to determine that the ink supply circuit is an unrecoverable fault when the number of consecutive executions exceeds a first preset number. The refined method includes: S110. When the ink supply circuit is blocked, control the diaphragm pump to run in reverse for a first preset time, and then control the diaphragm pump to run in forward. S120: Apply pulsed positive pressure to the ink inlet chamber.

[0043] S310, Obtain the number of consecutive executions of the diaphragm pump reversing and applying pulsed positive pressure; A complete recovery process includes: the diaphragm pump running in reverse for a first preset time, the diaphragm pump running in the forward direction, and applying pulsed positive pressure to the ink inlet chamber. After completing one full recovery process, the operating parameters can be checked again to determine if there is a blockage. If the blockage persists, the same recovery process is repeated. If the blockage in the ink supply circuit is severe, even repeating the recovery process multiple times may not clear the blockage, wasting time and ink, and potentially damaging the diaphragm pump or pipeline. A counter can be used to record the number of consecutive executions of the recovery process.

[0044] S320. When the number of consecutive executions exceeds the first preset number, the ink supply circuit is determined to be an unrecoverable fault.

[0045] The first preset number of times is a preset threshold, for example, 3 times. If the flow rate or current still does not return to normal after the number of consecutive executions exceeds the first preset number, the system determines that the ink supply circuit has an unrecoverable fault. At this time, the system must be forcibly stopped to prevent further damage caused by continuous attempts to recover. At the same time, an audible and visual alarm is triggered, prompting "Replace diaphragm pump".

[0046] In some optional embodiments of the present invention, applying a pulsed positive pressure to the ink inlet chamber includes: The peak pressure of the pulsed positive pressure is controlled to be less than or equal to the first preset pressure; The duration of a single pressurization is controlled to be less than or equal to a third preset time, and the interval between two adjacent pressurizations is a fourth preset time.

[0047] The peak pressure of the pulsed positive pressure refers to the maximum pressure value during each pressurization. The first preset pressure can be a preset safety pressure threshold within the ink supply system. For example, the first preset pressure can be set to 15 kPa. By limiting the peak pressure of the pulsed positive pressure to no more than the first preset pressure, damage to the ink supply components due to instantaneous high pressure can be avoided, ensuring the safety and stability of the ink pressing process. The duration of a single pressurization refers to the length of time that positive pressure is applied to the ink inlet chamber within one pulse cycle. The third preset time can be the maximum allowable duration of a single pressurization. For example, the third preset time can be 10 seconds. If the single pressurization time is too long, it may approach a constant pressure state. The fourth preset time can be the waiting time required after completing one pressurization. For example, the fourth preset time can be 2-3 seconds. Waiting for the fourth preset time after one pressurization is completed before the next pressurization can avoid excessive pressure caused by continuous pressurization.

[0048] Figure 5 This is a flowchart of a fault recovery control method for an ink supply circuit provided in an embodiment of the present invention. (Refer to...) Figure 5 The working principle of this invention is as follows: During normal ink filling, the system monitors the flow rate of the ink supply circuit or the operating current of the diaphragm pump motor in real time. When the flow rate of the ink supply circuit is lower than a preset flow rate threshold or the operating current of the diaphragm pump motor is greater than a preset current threshold, and the abnormal state persists for a period of time greater than or equal to a second preset time, the ink supply circuit is determined to be blocked. The second preset time can be 3-5 seconds. When the ink supply circuit is blocked, the positive and negative power supply circuits of the diaphragm pump motor are controlled to reverse the motor for a first preset time. This reverse action instantly generates a reverse negative pressure suction inside the pump chamber, actively breaking the stuck one-way valve and sucking up the air bubbles using the fluid backflow force. The first preset time can be 2-4 seconds. After backflushing for the first preset time, the diaphragm pump motor is restored to forward power supply. At the same time, to prevent secondary blockage, a pulsed positive pressure with a peak pressure less than or equal to the first preset pressure is applied to the ink inlet chamber. The duration of each pressurization is less than or equal to a third preset time, and the interval between two adjacent pressurizations is a fourth preset time, coordinating with the forward-running diaphragm pump to refill the ink. The first preset pressure can be 15 kPa, the third preset time can be 10 seconds, and the fourth preset time can be 2-3 seconds. Record the number of consecutive executions of "diaphragm pump reverse operation and application of pulsed positive pressure". If the flow rate or current still does not return to normal after the number of consecutive executions exceeds the first preset number, it is determined to be an unrecoverable fault, the machine is forcibly stopped, and an audible and visual alarm for "replacing the diaphragm pump" is triggered. The first preset number of executions can be 3. Traditional manual plug swapping for handling a single anomaly takes an average of 15 minutes, with a defective sheet leakage rate of approximately 0.5%. Using the fault recovery control method of the ink supply circuit of this invention, the time for handling a single anomaly is shortened to less than 20 seconds, and the defective sheet leakage rate is reduced to 0%.

[0049] The metal grid structure on the back of ABC / BC batteries is intricate and complex, thus requiring stringent zero-defect requirements for the continuity of the separator coating. Minor faults such as micro-air bubbles trapped in the ink supply circuit or partial jamming of the one-way valve can easily trigger ink supply pulsation within a short time, causing fluctuations in ink delivery rate. This, in turn, can lead to defects in the formed separator lines, such as necking and localized thinning, which are difficult to detect with the naked eye, directly affecting battery performance and yield. Using the fault recovery control method provided in this invention, the system can quickly self-heal and clear minor anomalies in flow rate and pipeline resistance, ensuring uniform and continuous separator coating and effectively improving battery manufacturing yield and production stability.

[0050] Figure 6 This is a schematic diagram of a fault recovery control device for an ink supply circuit according to an embodiment of the present invention. The ink supply circuit includes an ink return chamber, a diaphragm pump, and an ink inlet chamber. The ink return chamber is connected to the inlet side of the diaphragm pump, and the outlet side of the diaphragm pump is connected to the ink inlet chamber. Figure 6 As shown, the device includes: The diaphragm pump control module 410 is used to control the diaphragm pump to run in reverse for a first preset time when the ink supply circuit is blocked, and then control the diaphragm pump to run in forward. Pressure control module 420 is used to apply pulsed positive pressure to the ink inlet chamber.

[0051] The fault recovery control device for the ink supply circuit provided in this embodiment of the invention can execute the fault recovery control method for the ink supply circuit provided in any embodiment of the invention. Through the mutual cooperation and collaborative work between the modules, it has the corresponding functional modules and beneficial effects of the method.

[0052] In some optional embodiments of the present invention, the fault recovery control device for the ink supply circuit further includes a status judgment module, which is used to acquire the operating status parameters of the ink supply circuit during the forward operation of the diaphragm pump; determine whether the operating status parameters are in an abnormal state based on the operating status parameters; and determine the blockage state of the ink supply circuit based on the duration of the abnormal state when the operating status parameters are in an abnormal state.

[0053] The status judgment module is also used to determine that the operating status parameters are in an abnormal state when the operating status parameters include the flow rate of the ink supply circuit; and when the flow rate of the ink supply circuit is less than a preset flow rate threshold.

[0054] The status judgment module is also used to determine that the operating status parameters are in an abnormal state when the operating current of the diaphragm pump motor is greater than a preset current threshold, in cases where the operating status parameters include the operating current of the diaphragm pump motor.

[0055] The status judgment module is also used to determine that the ink supply circuit is blocked when the operating status parameter is in an abnormal state and the duration of the abnormal state is greater than or equal to a second preset time.

[0056] The fault recovery control device for the ink supply circuit also includes a fault identification module, which is used to obtain the number of consecutive executions of the diaphragm pump running in reverse and applying pulsed positive pressure; when the number of consecutive executions is greater than a first preset number, the ink supply circuit is determined to be an unrecoverable fault.

[0057] The pressure control module is also used to control the peak pressure of the pulsed positive pressure to be less than or equal to the first preset pressure; control the duration of a single pressurization to be less than or equal to the third preset time; and control the interval between two adjacent pressurizations to be the fourth preset time.

[0058] It should be understood that the various forms of processes shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this invention can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this invention can be achieved, and this is not limited herein.

[0059] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A fault recovery control method for an ink supply circuit, characterized in that, The ink supply circuit includes an ink return chamber, a diaphragm pump, and an ink inlet chamber. The ink return chamber is connected to the inlet side of the diaphragm pump, and the outlet side of the diaphragm pump is connected to the ink inlet chamber. The method includes: When the ink supply circuit is blocked, the diaphragm pump is controlled to run in reverse for a first preset time, and then the diaphragm pump is controlled to run in forward. Apply pulsed positive pressure to the ink inlet chamber.

2. The fault recovery control method for the ink supply circuit according to claim 1, characterized in that, When the ink supply circuit is blocked, after controlling the diaphragm pump to run in reverse for a first preset time and before controlling the diaphragm pump to run in the forward direction, the following steps are also included: During the forward operation of the diaphragm pump, the operating status parameters of the ink supply circuit are acquired; Determine whether the operating status parameters are in an abnormal state based on the operating status parameters; When the operating status parameters are in an abnormal state, the blockage status of the ink supply circuit is determined based on the duration of the abnormal state.

3. The fault recovery control method for the ink supply circuit according to claim 2, characterized in that, The operating status parameters include the flow rate of the ink supply circuit; Determining whether the operating status parameters are in an abnormal state based on the operating status parameters includes: When the flow rate of the ink supply circuit is less than a preset flow rate threshold, the operating status parameter is determined to be in an abnormal state.

4. The fault recovery control method for the ink supply circuit according to claim 3, characterized in that, The operating status parameters include the operating current of the diaphragm pump motor; Determining whether the operating status parameters are in an abnormal state based on the operating status parameters includes: If the operating current of the diaphragm pump motor is greater than a preset current threshold, the operating status parameter is determined to be in an abnormal state.

5. The fault recovery control method for the ink supply circuit according to claim 4, characterized in that, When the operating status parameters are in an abnormal state, the blockage status of the ink supply circuit is determined based on the duration of the abnormal state, including: When the operating status parameter is in an abnormal state and the duration of the abnormal state is greater than or equal to a second preset time, it is determined that the ink supply circuit is in a blocked state.

6. The fault recovery control method for the ink supply circuit according to claim 5, characterized in that, The second preset time is 3 to 5 seconds.

7. The fault recovery control method for the ink supply circuit according to claim 1, characterized in that, The first preset time is 2 to 4 seconds.

8. The fault recovery control method for the ink supply circuit according to claim 1, characterized in that, After applying pulsed positive pressure to the ink inlet chamber, the process also includes: The number of consecutive executions of the diaphragm pump reversing and applying pulsed positive pressure is obtained; When the number of consecutive executions exceeds a first preset number, the ink supply circuit is determined to be an unrecoverable fault.

9. The fault recovery control method for the ink supply circuit according to claim 1, characterized in that, Applying pulsed positive pressure to the ink inlet chamber includes: The peak pressure of the pulsed positive pressure is controlled to be less than or equal to a first preset pressure; The duration of a single pressurization is controlled to be less than or equal to a third preset time, and the interval between two adjacent pressurizations is a fourth preset time.

10. A fault recovery control device for an ink supply circuit, characterized in that, The ink supply circuit includes an ink return chamber, a diaphragm pump, and an ink inlet chamber. The ink return chamber is connected to the inlet side of the diaphragm pump, and the outlet side of the diaphragm pump is connected to the ink inlet chamber. The device includes: The diaphragm pump control module is used to control the diaphragm pump to run in reverse for a first preset time when the ink supply circuit is blocked, and then control the diaphragm pump to run in forward. The pressure control module is used to apply pulsed positive pressure to the ink inlet chamber.

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