TFT substrate glass tank electrode cooling air automatic control system

Abstract

The application discloses a TFT substrate glass tank electrode cooling air automatic control system and belongs to the technical field of substrate glass manufacturing. The system comprises an air conditioning unit, a fan, an air bellow, an air cooling device, a temperature sensor and an electrode cooling air automatic control system. The air conditioning unit, the fan, the air bellow and the air cooling device are sequentially connected through ventilation pipelines to form a cooling air passage, and the air outlet of the air cooling device is aligned with the electrode of the tank. The temperature sensor is arranged around the electrode to detect the temperature. The electrode cooling air automatic control system is electrically connected with the temperature sensor and the fan, receives the temperature signal, compares the temperature signal with a set temperature, automatically adjusts the operation frequency of the fan to control the air volume. The application can automatically control the temperature around the electrode, effectively solves the problems of manual adjustment lag and poor precision, guarantees the heat dissipation of the electrode, meets the process requirements, improves the production efficiency and safety, and has a simple structure and is convenient to operate and maintain.

Description

Technical Field

[0001] This application belongs to the field of glass manufacturing technology, and specifically relates to an automatic control system for electrode cooling air in a TFT substrate glass bath furnace. Background Technology

[0002] In the manufacturing process of TFT substrate glass, the furnace is the core equipment used to melt the glass batch. Its heating method typically combines electric heating and gas heating. Electric melting utilizes the electrical conductivity of molten glass; by passing electricity through electrode bricks inserted into the molten glass, Joule heating is generated, thereby improving the melting efficiency and temperature uniformity of the glass.

[0003] Electrode bricks generate a significant amount of heat during operation, causing their temperature to rise rapidly. Simultaneously, the entire furnace operates in a high-temperature environment, making heat dissipation a particularly critical issue for the electrode bricks. Currently, existing technologies commonly employ forced air cooling systems to cool the furnace wall bricks and electrode bricks. However, current cooling technologies have low levels of automation and intelligence, with airflow adjustment largely relying on manual adjustments of fan valves or frequencies by operators. This manual control method suffers from response lag and poor adjustment precision, making it difficult to accurately and in real-time adapt to changes in furnace operating conditions. This results in large temperature fluctuations in the electrode bricks, posing a risk of overheating and damage.

[0004] Furthermore, as tank furnaces develop towards larger volumes and higher efficiency, the size and power of heating devices such as electrodes are also increasing, making their heat dissipation requirements even more stringent. Due to the extremely high temperature around the electrode bricks, close-range manual operation is not only highly dangerous but also makes it difficult to effectively observe and intervene in the melting of the molten glass. Utility Model Content

[0005] The purpose of this application is to provide an automatic control system for electrode cooling air in a TFT substrate glass bath furnace. This system addresses the problems mentioned in the background art, such as low automation and intelligence levels in existing cooling technologies, reliance on manual adjustment of fan opening leading to lag and poor adjustment accuracy, difficulty in heat dissipation of electrodes in large-volume bath furnaces, low safety of manual operation, and difficulty in observing the glass molten metal manufacturing process.

[0006] To achieve the above objectives, this application adopts the following technical solution: A TFT substrate glass furnace electrode cooling air automatic control system includes: an air conditioning unit, a fan, an air box, an air cooling device, a temperature sensor, and an electrode cooling air automatic control system; The air conditioning unit, fan, air box and air cooling device are connected in sequence through ventilation ducts to form a cooling air passage. The air outlet of the air cooling device is set to face the electrodes of the furnace. The temperature sensor is positioned around the electrode to detect the temperature around the electrode. The electrode cooling air automatic control system is electrically connected to the temperature sensor and the fan, and is configured to receive the temperature signal from the temperature sensor, compare it with the set temperature, and automatically adjust the operating frequency of the fan according to the comparison result to control the air volume of the cooling air.

[0007] In one possible implementation, the electrode cooling air automatic control system is configured to: initiate frequency adjustment of the fan when the difference between the temperature detected by the temperature sensor and the set temperature exceeds a preset fluctuation range.

[0008] In one possible implementation, the preset fluctuation range is ±30°C of the set temperature.

[0009] In one possible implementation, the air-cooling device includes a T-shaped air outlet with the air outlet surface facing the electrode.

[0010] In one possible implementation, the number of temperature sensors is multiple, respectively disposed on the left, right and above the electrode.

[0011] In one possible implementation, the portion of the ventilation duct connecting the fan and the air box, and the portion connecting the air box and the air-cooling device, is made of flexible tubing.

[0012] In one possible implementation, the electrode cooling air control system is a DCS temperature control system.

[0013] In one possible implementation, the width of the T-shaped air outlet is greater than the width of the electrode.

[0014] In one possible implementation, the system includes a plurality of the air-cooling devices, each corresponding to a plurality of electrode settings in the tank furnace.

[0015] In one possible implementation, the electrode cooling air control system collects the average temperature value of the temperature sensor on a cycle of one minute.

[0016] Compared with the prior art, this application has the following beneficial effects: This application provides an automatic control system for electrode cooling air in a TFT substrate glass furnace. By automating the control of electrode cooling air, it eliminates the need for manual adjustment of the fan opening, avoiding the problems of response lag and poor adjustment accuracy associated with manual control. It can control the temperature around the electrodes in real time and accurately, ensuring effective heat dissipation of the electrode bricks and preventing electrode damage due to overheating. This meets the process requirements for TFT substrate glass manufacturing, while reducing manual intervention, lowering the safety risks of manual operation in high-temperature environments, and improving the stability and efficiency of the production process.

[0017] In one possible implementation, a defined ±30℃ fluctuation range provides a precise judgment standard for system adjustment, which meets the actual process requirements of electrode heat dissipation in TFT substrate glass bath furnace. This effectively avoids the risk of electrode damage caused by excessive temperature deviation, and also prevents frequent system operation due to an excessively narrow adjustment threshold, ensuring the stability and reliability of system operation. At the same time, it facilitates system debugging and maintenance by operators based on this fixed range.

[0018] In one possible implementation, multiple temperature sensors detect the temperature around the electrode from different directions, which can comprehensively reflect the temperature distribution of the electrode and avoid the local temperature deviation problem that exists in the detection of a single sensor. This makes the temperature information obtained by the electrode cooling air automatic control system more accurate and comprehensive. Based on the accurate data, the fan frequency is adjusted to ensure that the overall temperature of the electrode is stable within the set range, improve the accuracy of the system temperature control, ensure uniform heat dissipation of the electrode, and reduce the damage to the electrode caused by excessive local temperature.

[0019] In one possible implementation, using flexible hoses to connect key parts of the ventilation duct enhances the flexibility of system installation, adapts to the complex equipment layout environment around the furnace, and reduces installation difficulty. At the same time, the hoses have a certain shock absorption effect, which can reduce the impact of vibrations generated by the fan during operation on equipment such as the air box and air-cooling device, and extend the service life of the equipment. In addition, the sealed hoses can effectively prevent cooling air leakage, ensure the utilization efficiency of cooling air, ensure the cooling effect, and the hoses are easy to disassemble, facilitating the maintenance and replacement of system components in the future. Attached Figure Description

[0020] Figure 1 A schematic diagram of the overall structure of an automatic control system for electrode cooling air in a TFT substrate glass bath furnace provided in this application; Figure 2 This is a schematic diagram of the structure of an air-cooling device provided in this application.

[0021] The attached diagram is labeled as follows: 1. Hose connector; 2. Air-cooling device; 3. Temperature sensor; 4. T-shaped air outlet; 5. Electrode. Detailed Implementation

[0022] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope. Therefore, the drawings and description are considered to be exemplary in nature and not restrictive.

[0023] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0024] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly defined. The specific embodiments of this application will be further described in detail below with reference to the accompanying drawings.

[0025] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0026] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0027] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0028] like Figure 1 and Figure 2 As shown, this application discloses an automatic control system for electrode cooling air in a TFT substrate glass furnace, which may include an air conditioning unit, a fan, a wind box, an air-cooling device 2, a temperature sensor 3, and an automatic control system for electrode cooling air.

[0029] The air conditioning unit, fan, air box and air-cooling device 2 are connected in sequence through ventilation ducts to form a cooling air passage. The air outlet of the air-cooling device 2 is set to face the electrode 5 of the furnace.

[0030] The temperature sensor 3 is positioned around the electrode 5 to detect the temperature around the electrode 5.

[0031] The electrode cooling air automatic control system is electrically connected to the temperature sensor 3 and the fan. It is configured to receive the temperature signal from the temperature sensor 3, compare it with the set temperature, and automatically adjust the operating frequency of the fan according to the comparison result to control the air volume of the cooling air.

[0032] Specifically, in the TFT substrate glass furnace production scenario, this electrode cooling air automatic control system is built. The air conditioning unit serves as the cooling air source, and its output end is connected to the fan input end through a ventilation duct. The fan output end is connected to the air box through a ventilation duct, and the air box is then connected to the air cooling device 2 through a ventilation duct, forming a complete cooling air passage. The air outlet of the air cooling device 2 is precisely aligned with the electrode brick 5 inside the furnace.

[0033] Temperature sensor 3 is installed around electrode 5 brick, and temperature sensor 3 is electrically connected to electrode cooling air automatic control system through wires. Fan is also electrically connected to the automatic control system through wires.

[0034] The temperature value around electrode 5 that meets the process requirements is preset in the electrode cooling air automatic control system. During the operation of the furnace, the temperature sensor 3 continuously detects the temperature around electrode 5 and transmits the signal to the automatic control system. After receiving the signal, the automatic control system compares it with the set temperature. If the detected temperature is higher than the set temperature, the fan operating frequency is automatically increased to increase the air volume. If the detected temperature is lower than the set temperature, the fan operating frequency is automatically reduced to decrease the air volume.

[0035] In this embodiment, the automated control of the cooling air of electrode 5 eliminates the need for manual adjustment of the fan opening, avoiding the problems of response lag and poor adjustment accuracy of manual control. It can control the temperature around electrode 5 in real time and accurately, ensuring effective heat dissipation of electrode 5 brick, preventing electrode 5 from being damaged due to overheating, meeting the process requirements of TFT substrate glass manufacturing, reducing manual intervention, lowering the safety risks of manual operation in high temperature environment, and improving the stability and efficiency of the production process.

[0036] In one possible embodiment, the electrode cooling air control system is configured as follows: When the difference between the temperature detected by the temperature sensor 3 and the set temperature exceeds the preset fluctuation range, the frequency adjustment of the fan is initiated.

[0037] The temperature fluctuation range is preset in the electrode cooling air automatic control system.

[0038] For example, if the set temperature around electrode 5 is 300℃, the preset fluctuation range is 300℃±30℃. During system operation, temperature sensor 3 collects the average temperature around electrode 5 every minute and transmits it to the automatic control system. The automatic control system compares the detected temperature with the set temperature. When the difference is within ±30℃, the automatic control system determines that the temperature is in a normal fluctuation state and does not start the fan frequency adjustment; when the difference exceeds ±30℃, the automatic control system immediately starts the adjustment program and adjusts the fan frequency according to the temperature deviation.

[0039] In this embodiment, by setting a temperature fluctuation range, frequent adjustments to the fan due to minor temperature fluctuations are avoided, unnecessary start-ups and shutdowns and frequency changes of the fan are reduced, the fan's service life is extended, and energy consumption is reduced. At the same time, it is ensured that adjustments are only made when the temperature deviates from the allowable range of the process, which not only ensures that the temperature around electrode 5 is stable within a reasonable range, but also improves the economy and stability of the system operation.

[0040] In one possible embodiment, the preset fluctuation range is ±30°C of the set temperature.

[0041] The preset fluctuation range is specifically set to ±30℃ of the set temperature. Assuming the set temperature around electrode 5 is 280℃, when the temperature detected by temperature sensor 3 is between 250℃ and 310℃, the electrode cooling air automatic control system determines it as normal temperature fluctuation and does not adjust the fan frequency.

[0042] When the detected temperature is below 250℃ or above 310℃, the automatic control system adjusts the fan frequency according to the temperature. For example, when the temperature is 320℃, it automatically increases the fan frequency and air volume until the temperature drops back to the 250℃-310℃ range.

[0043] In this embodiment, the defined ±30℃ fluctuation range provides a precise judgment standard for system adjustment, which meets the actual process requirements of heat dissipation of electrode 5 in TFT substrate glass bath furnace. It can effectively avoid the risk of electrode 5 being damaged due to excessive temperature deviation, and will not cause frequent system operation due to excessively narrow adjustment threshold, thus ensuring the stability and reliability of system operation. At the same time, it is convenient for operators to perform system debugging and maintenance based on this fixed range.

[0044] In one possible embodiment, the air-cooling device 2 includes a T-shaped air outlet 4, the air outlet surface of which faces the electrode 5.

[0045] Optionally, a T-shaped air outlet 4 is adopted. The length of the horizontal part of the T-shaped air outlet 4 is adapted to the length of the electrode 5, and the vertical part is connected to the ventilation duct of the air-cooling device 2. The air outlet surface of the T-shaped air outlet 4 is directly facing the surface of the electrode 5 brick, so as to ensure that the cooling air blown out from the T-shaped air outlet 4 can cover most of the area of ​​the electrode 5 brick.

[0046] In actual operation, the cooling air enters the air-cooling device 2 through the air box and is then blown evenly onto the electrode brick 5 through the T-shaped air outlet 4.

[0047] In this embodiment, the T-shaped air outlet 4 significantly increases the contact area between the cooling air and the electrode 5 while keeping the air volume constant. This allows the cooling air to act more evenly on the surface of the electrode 5 brick, avoiding the temperature difference of the electrode 5 brick caused by uneven local cooling in traditional air outlets. This improves heat dissipation efficiency, effectively prevents the electrode 5 brick from being damaged due to local overheating, extends the service life of the electrode 5 brick, and ensures the stable working state of the electrode 5, which is beneficial to improving the production quality of TFT substrate glass.

[0048] In one possible embodiment, there are multiple temperature sensors 3, which are respectively disposed on the left, right and above the electrode 5.

[0049] Specifically, three temperature sensors 3 are installed and fixed on the left, right and top of the electrode 5 respectively, and the distance between each temperature sensor 3 and the surface of the electrode 5 is kept consistent to ensure the consistency and representativeness of the detection data.

[0050] During system operation, the three temperature sensors 3 simultaneously collect temperature data at their respective locations and transmit the data to the electrode cooling air automatic control system in real time. The automatic control system performs comprehensive analysis on the data from the three sensors to determine the overall temperature around the electrode 5.

[0051] In this embodiment, multiple temperature sensors 3 detect the temperature around the electrode 5 from different directions, which can comprehensively reflect the temperature distribution of the electrode 5 and avoid the local temperature deviation problem that exists in the detection of a single sensor. This makes the temperature information obtained by the electrode cooling air automatic control system more accurate and comprehensive. Based on the accurate data, the fan frequency is adjusted to ensure that the overall temperature of the electrode 5 is stable within the set range, improve the accuracy of the system temperature control, ensure uniform heat dissipation of the electrode 5, and reduce the damage to the electrode 5 caused by excessive local temperature.

[0052] In one possible embodiment, the portion of the ventilation duct that connects the fan to the air box and the portion that connects the air box to the air-cooling device 2 is made of a flexible hose.

[0053] In the ventilation duct design, the ventilation duct section connecting the fan and the air box uses a high-temperature resistant flexible hose, which can be connected through the hose interface 1. The ventilation duct section connecting the air box and the air-cooling device 2 also uses a high-temperature resistant flexible hose. The connection points between the hose and the fan, air box, and air-cooling device 2 are sealed with seals to prevent cooling air leakage.

[0054] During system installation and maintenance, the flexibility of the hoses can be used to adjust the relative positions of the various devices, facilitating equipment installation, commissioning, and subsequent maintenance.

[0055] In this embodiment, flexible hoses are used to connect key parts of the ventilation duct, which enhances the flexibility of system installation, adapts to the complex equipment layout environment around the furnace, and reduces installation difficulty. At the same time, the hoses have a certain shock absorption effect, which can reduce the impact of vibration generated by the fan during operation on equipment such as the air box and air-cooling device 2, and extend the service life of the equipment. In addition, the sealed hoses can effectively prevent cooling air leakage, ensure the utilization efficiency of cooling air, ensure the cooling effect, and the hoses are easy to disassemble, which facilitates the maintenance and replacement of system components in the future.

[0056] In one possible embodiment, the electrode cooling air control system is a DCS temperature control system.

[0057] Optionally, the electrode cooling air automatic control system can be a DCS temperature automatic control system. This system is connected to the temperature sensor 3 and the fan through dedicated data lines and control lines. The temperature control program is pre-written in the DCS system, and parameters such as temperature acquisition cycle and set temperature value are set.

[0058] During operation, the DCS system collects temperature data from temperature sensor 3 according to a set cycle. After data processing and analysis, it sends frequency adjustment commands to the fan to achieve automatic control of the fan.

[0059] In this embodiment, the DCS temperature control system features strong data processing capabilities, high control precision, and good stability. It can accurately receive and analyze signals transmitted by temperature sensor 3, quickly respond to temperature changes, and issue fan adjustment commands to ensure the accuracy and timeliness of temperature control around electrode 5. At the same time, the DCS system has a user-friendly human-machine interface, which facilitates operators to monitor the system's operating status, view temperature data, and adjust parameters in real time, improving the convenience of system operation and maintenance. Furthermore, its reliable operating performance reduces the probability of system failure, ensuring continuous and stable production.

[0060] In one possible embodiment, the width of the T-shaped air outlet 4 is greater than the width of the electrode 5.

[0061] Optionally, in the design of the T-shaped air outlet 4, ensure that the width of the T-shaped air outlet 4 is greater than the width of the electrode 5.

[0062] For example, if the width of electrode 5 is 15cm, the lateral width of T-shaped air outlet 4 is set to 20cm so that the cooling air blown out by T-shaped air outlet 4 can completely cover the surface of electrode 5, and there is a certain margin in the width direction of electrode 5 to avoid the cooling air only acting on a local area of ​​electrode 5.

[0063] In this embodiment, the width of the T-shaped air outlet 4 is greater than the width of the electrode 5, which ensures that the cooling air fully covers the surface of the electrode 5 without any cooling dead corners, further improving the uniformity of the cooling air action, effectively reducing the overall temperature of the electrode 5, and preventing the electrode 5 from being overheated and damaged due to ineffective cooling of the edges or local areas; at the same time, the sufficient air outlet width also provides adaptation space for subsequent fine-tuning of the size of the furnace electrode 5, enhancing the versatility of the system and reducing the need for air outlet modification due to changes in the size of the electrode 5.

[0064] In one possible embodiment, the system includes a plurality of the air-cooling devices 2, each corresponding to a plurality of electrodes 5 of the furnace.

[0065] Optionally, a corresponding number of air-cooling devices 2 can be configured according to the number of electrodes 5 in the furnace. For example, if there are 6 electrodes 5 in the furnace, then 6 air-cooling devices 2 can be set up. Each air-cooling device 2 is connected to the air box through an independent ventilation duct, and the air outlet of each air-cooling device 2 is aligned with the corresponding electrode 5.

[0066] Each air-cooling device 2 is equipped with an independent temperature sensor 3. All temperature sensors 3 and fans are connected to the same electrode cooling air automatic control system. The automatic control system can control the fan and air-cooling device 2 corresponding to each electrode 5 respectively.

[0067] In this embodiment, multiple air-cooling devices 2 correspond to multiple electrodes 5, realizing independent cooling control for each electrode 5 in the furnace. The air volume can be precisely adjusted according to the actual temperature of each electrode 5, avoiding the problem of insufficient or excessive cooling of some electrodes 5 due to multiple electrodes 5 sharing a set of cooling devices. At the same time, the independent control mode also makes it convenient to repair only the faulty part when a certain electrode 5 or air-cooling device 2 fails, without affecting the normal cooling and production of other electrodes 5, thus improving the reliability of system operation and the continuity of production.

[0068] In one possible embodiment, the electrode cooling air control system collects the average temperature value of the temperature sensor 3 on a minute-by-minute basis.

[0069] The data acquisition cycle is set to every minute, meaning the automatic control system acquires temperature data detected by temperature sensor 3 every minute and averages all temperature data transmitted by the sensor within that minute to obtain the average temperature value per minute. The automatic control system compares this average temperature value with the set temperature and decides whether to adjust the fan frequency based on the comparison result.

[0070] In this embodiment, the average temperature value is collected every minute, which can effectively filter out the instantaneous temperature fluctuations detected by the temperature sensor 3, avoid the system from being mis-adjusted due to instantaneous temperature anomalies, and make the temperature data obtained by the automatic control system more representative and stable. The fan adjustment based on this data is more accurate and reasonable. At the same time, the minute collection cycle can reflect the temperature change trend around the electrode 5 in a timely manner, and will not increase the system data processing burden due to excessively high collection frequency, thus balancing the system's response speed and operating efficiency.

[0071] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them; although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications to the technical solutions described in the foregoing embodiments, or equivalent substitutions for some or all of the technical features, do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A self-control system for electrode cooling air in a TFT substrate glass bath furnace, characterized in that, include: Air conditioning unit, fan, air box, air-cooled device (2), temperature sensor (3) and electrode (5) cooling air automatic control system; The air conditioning unit, fan, air box and air cooling device (2) are connected in sequence through ventilation ducts to form a cooling air passage. The air outlet of the air cooling device (2) is set to face the electrode (5) of the furnace. The temperature sensor (3) is disposed around the electrode (5) for detecting the temperature around the electrode (5); The electrode (5) cooling air automatic control system is electrically connected to the temperature sensor (3) and the fan, and is configured to receive the temperature signal from the temperature sensor (3), compare it with the set temperature, and automatically adjust the operating frequency of the fan according to the comparison result to control the air volume of the cooling air.

2. The TFT substrate glass bath furnace electrode cooling air automatic control system according to claim 1, characterized in that, The electrode (5) cooling air automatic control system is configured as follows: When the difference between the temperature detected by the temperature sensor (3) and the set temperature exceeds the preset fluctuation range, the frequency adjustment of the fan is initiated.

3. The TFT substrate glass bath furnace electrode cooling air automatic control system according to claim 2, characterized in that, The preset fluctuation range is ±30℃ of the set temperature.

4. The TFT substrate glass bath furnace electrode cooling air automatic control system according to claim 1, characterized in that, The air-cooling device (2) includes a T-shaped air outlet (4), the air outlet surface of which faces the electrode (5).

5. The TFT substrate glass bath furnace electrode cooling air automatic control system according to claim 1, characterized in that, The temperature sensors (3) are multiple and are respectively located on the left, right and above the electrode (5).

6. The TFT substrate glass bath furnace electrode cooling air automatic control system according to claim 1, characterized in that, The ventilation duct that connects the fan to the air box and the air box to the air-cooling device (2) uses flexible hoses.

7. The TFT substrate glass bath furnace electrode cooling air automatic control system according to claim 1, characterized in that, The electrode (5) cooling air automatic control system is a DCS temperature automatic control system.

8. The TFT substrate glass bath furnace electrode cooling air automatic control system according to claim 4, characterized in that, The width of the T-shaped air outlet (4) is greater than the width of the electrode (5).

9. The TFT substrate glass bath furnace electrode cooling air automatic control system according to claim 1, characterized in that, The system includes multiple air-cooling devices (2) for setting up multiple electrodes (5) of the furnace respectively.

10. The TFT substrate glass bath furnace electrode cooling air automatic control system according to claim 1, characterized in that, The electrode (5) cooling air automatic control system collects the average temperature value of the temperature sensor (3) every minute.

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