A coating oven device and a coating machine

Abstract

This utility model relates to the field of battery technology and discloses a coating oven device and a coating machine. The coating oven device includes a first chamber, a second chamber, a fresh air duct, an exhaust air duct, and a return air duct. The first chamber has a first accelerated drying zone, a first uniform drying zone, and a first deceleration drying zone. The second chamber has a second accelerated drying zone, a second uniform drying zone, and a second deceleration drying zone. The fresh air duct includes a first fresh air pipe connected to the first accelerated drying zone. The exhaust air duct includes a second exhaust air pipe connected to the second deceleration drying zone. The return air duct includes a first return air pipe connected to the second exhaust air pipe and the first fresh air duct. Through the interconnection of the first fresh air duct, the first return air duct, and the second exhaust air duct, the coating oven device can realize the recycling of low solvent concentration hot air in the second deceleration drying zone, reducing heat waste and energy consumption.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a coating oven device and a coating machine. Background Technology

[0002] With the development of the new energy industry, the demand for power batteries is growing rapidly, driving the upgrading of coating equipment towards high speed and wide width. However, the energy consumption of coating machines is rising accordingly, with oven heating energy consumption accounting for the largest share. Energy saving and consumption reduction have become urgent problems to be solved.

[0003] Currently, the coating process mainly focuses on controlling hot air temperature and volume, lacking effective management of heat recycling. The solvent content in the exhaust air varies in each section of the drying oven, but existing systems typically collect all exhaust air and discharge it via heat exchange without proper allocation. During electrode drying, the electrodes typically undergo accelerated drying, uniform drying, and deceleration drying stages. In these three stages, the solvent evaporation rate initially increases, then stabilizes, and then decreases. The uniform drying stage has higher requirements for solvent concentration and hot air conditions, while the accelerated and deceleration drying stages have lower requirements. Because the solvent evaporation rate is lower in the deceleration drying stage, the exhaust air carries a lower solvent concentration. However, current coating oven devices collect exhaust air from the low-solvent-concentration area and discharge it together with the high-solvent-concentration area, failing to recycle the exhaust air from the low-solvent-concentration area, resulting in significant heat waste and increased energy consumption. Utility Model Content

[0004] With the aim of at least solving one of the technical problems existing in the prior art, this utility model aims to provide a coating oven device and a coating machine including the coating oven device, wherein the coating oven device can reduce heat waste and energy consumption.

[0005] To achieve the above objectives, in a first aspect, this utility model provides a coating oven device, comprising a first chamber, a second chamber, a fresh air duct, an exhaust air duct, and a return air duct; the first chamber has a first accelerated drying zone, a first uniform drying zone, and a first deceleration drying zone arranged sequentially; the second chamber has a second accelerated drying zone, a second uniform drying zone, and a second deceleration drying zone arranged sequentially; the fresh air duct includes a first fresh air pipe, the output end of which is connected to the first accelerated drying zone; the exhaust air duct includes a second exhaust air pipe, the input end of which is connected to the second deceleration drying zone; the return air duct includes a first return air pipe, the input end of which is connected to the second exhaust air pipe, and the output end of which is connected to the first fresh air duct.

[0006] In some embodiments, the coating oven apparatus has a first orientation; the second chamber is located on one side of the first chamber in the first orientation; and along the first orientation, the second deceleration drying zone and the first acceleration drying zone at least partially overlap.

[0007] In some embodiments, the coating oven apparatus further has a second direction perpendicular to the first direction, the first fresh air duct extends at least partially along the first direction, the second exhaust air duct extends at least partially along the first direction, the first return air duct extends at least partially along the second direction, and the first return air duct is connected to the first fresh air duct and the second exhaust air duct at opposite ends in the second direction, respectively.

[0008] In some embodiments, the coating oven apparatus further includes a first return air valve, wherein the first return air duct is provided with the first return air valve, and the first return air valve is used to regulate the flow rate of hot air delivered to the first fresh air duct via the first return air duct.

[0009] In some embodiments, the coating oven apparatus further includes a second exhaust valve and a first fresh air valve. The second exhaust duct is equipped with the second exhaust valve, the input end of the first return air duct is located between the second exhaust valve and the second chamber, the first fresh air duct is equipped with the first fresh air valve, and the output end of the first return air duct is located between the first fresh air valve and the first chamber.

[0010] In some embodiments, the coating oven apparatus further includes a first solvent concentration detector, which is installed in the first fresh air duct and is located between the output end of the first return air duct and the output end of the first fresh air duct.

[0011] In some embodiments, there are multiple second exhaust ducts, multiple first fresh air ducts, and multiple first return air ducts; one second exhaust duct is connected to one first fresh air duct through one first return air duct.

[0012] In some embodiments, the exhaust duct further includes a first exhaust pipe, the input end of which is connected to the first deceleration drying zone; the fresh air duct further includes a second fresh air duct, the output end of which is connected to the second acceleration drying zone; the return air duct further includes a second return air duct, the input end of which is connected to the first exhaust duct, and the output end of which is connected to the second fresh air duct.

[0013] In some embodiments, the coating oven apparatus further includes a second return air valve, wherein the second return air duct is provided with the second return air valve, and the second return air valve is used to regulate the flow rate of hot air delivered to the second fresh air duct via the second return air duct.

[0014] Secondly, this utility model also provides a coating machine, which includes a coating oven apparatus according to any one of the above claims.

[0015] Compared with the prior art, the coating oven device provided in this embodiment of the present invention has the following advantages: by connecting the input end and the output end of the first return air duct to the second exhaust air duct and the first fresh air duct respectively, the exhaust air of the second deceleration drying zone can be reintroduced into the first acceleration drying zone. In this way, the low solvent concentration hot air discharged from the deceleration drying stage of the electrode can be reused in the acceleration drying stage of the electrode, so as to realize the recycling of the low solvent concentration hot air in the second deceleration drying zone, reduce heat waste, and reduce energy consumption. Attached Figure Description

[0016] Figure 1 This is a system block diagram of a coating oven device provided in an embodiment of the present invention;

[0017] Figure 2 This is a schematic diagram showing that the second deceleration drying zone is connected to the first acceleration drying zone via an air duct, as provided in this embodiment of the utility model.

[0018] Figure 3 This is a schematic diagram showing the connection of the first fresh air duct, the first return air duct, and the second exhaust air duct provided in this embodiment of the utility model;

[0019] Figure 4 This is a schematic diagram showing that the first deceleration drying zone is connected to the second acceleration drying zone through an air duct in an embodiment of this utility model;

[0020] Figure 5 This is a schematic diagram showing the connection of the second fresh air duct, the second return air duct, and the first exhaust air duct provided in this embodiment of the utility model;

[0021] Figure 6 This is a partial structural schematic diagram of a coating oven device provided in an embodiment of this utility model;

[0022] Figure 7 This is a partial front view of a coating oven apparatus provided in an embodiment of this utility model.

[0023] In the diagram, 11 is the first drying chamber; 12 is the second drying chamber; 111 is the first accelerated drying zone; 112 is the first uniform drying zone; 113 is the first deceleration drying zone; 121 is the second accelerated drying zone; 122 is the second uniform drying zone; and 123 is the second deceleration drying zone.

[0024] 2. Fresh air duct; 21. First fresh air duct; 22. Second fresh air duct; 23. Third fresh air duct; 24. Fourth fresh air duct; 25. First main fresh air duct; 26. Second main fresh air duct; 27. First main fresh air fan; 28. Second main fresh air fan;

[0025] 3. Exhaust duct; 31. First exhaust duct; 32. Second exhaust duct; 33. Third exhaust duct; 34. Fourth exhaust duct; 35. First main exhaust duct; 36. Second main exhaust duct; 37. First exhaust main fan; 38. Second exhaust main fan;

[0026] 4. Return air duct; 41. First return air duct; 42. Second return air duct;

[0027] 51. First return air valve; 52. First exhaust air valve; 53. First fresh air valve; 54. First solvent concentration detector; 55. Second return air valve; 56. Second exhaust air valve; 57. Second fresh air valve; 58. Second solvent concentration detector;

[0028] 61. First heat exchanger; 62. Second heat exchanger;

[0029] Z, first direction; Y, second direction; X, third direction. Detailed Implementation

[0030] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0031] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model 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. Therefore, they should not be construed as limitations on this utility model.

[0032] 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. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

[0033] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," 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 or an electrical 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 utility model according to the specific circumstances.

[0034] In this invention, unless otherwise explicitly 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 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 directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0035] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the description of this application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms "comprising" and "having" and any variations thereof in the description, claims and foregoing drawings of this application are intended to cover non-exclusive inclusion.

[0036] In this application, the reference to "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that is mutually exclusive with other embodiments.

[0037] Firstly, such as Figures 1-7 As shown, a preferred embodiment of the present invention is a coating oven device, which includes a first chamber 11, a second chamber 12, a fresh air duct 2, an exhaust air duct 3, and a return air duct 4.

[0038] The first chamber 11 has a first accelerated drying zone 111, a first uniform drying zone 112, and a first deceleration drying zone 113 arranged in sequence; the second chamber 12 has a second accelerated drying zone 121, a second uniform drying zone 122, and a second deceleration drying zone 123 arranged in sequence; the fresh air duct 2 includes a first fresh air pipe 21, the output end of which is connected to the first accelerated drying zone 111; the exhaust duct 3 includes a second exhaust duct 32, the input end of which is connected to the second deceleration drying zone 123; the return air duct 4 includes a first return air pipe 41, the input end of which is connected to the second exhaust duct 32, and the output end of which is connected to the first fresh air duct 21.

[0039] Based on this technical solution, by connecting the input end and output end of the first return air duct 41 to the second exhaust air duct 32 and the first fresh air duct 21 respectively, the exhaust air of the second deceleration drying zone 123 can be reintroduced into the first acceleration drying zone 111. In this way, the low solvent concentration hot air discharged from the deceleration drying stage of the electrode can be reused in the acceleration drying stage of the electrode, so as to realize the recycling of the low solvent concentration hot air in the second deceleration drying zone 123, reduce heat waste, and reduce energy consumption.

[0040] It is understandable that the input end of an air duct (such as a fresh air duct, exhaust air duct, return air duct, etc.) refers to the end where air flows into the duct, and the output end refers to the end where air flows out of the duct; that is, air flows from the input end to the output end within the duct. The output end of the first fresh air duct 21 is connected to the first accelerated drying zone 111, meaning that fresh air flows into the first accelerated drying zone 111 from the first fresh air duct 21. The input end of the second exhaust air duct 32 is connected to the second deceleration drying zone 123, meaning that exhaust air flows from the second deceleration drying zone 123 to the second exhaust air duct 32. The input end of the first return air duct 41 is connected to the second exhaust air duct 32, and the output end of the first return air duct 41 is connected to the first fresh air duct 21, meaning that air in the second exhaust air duct 32 flows through the first return air duct 41 to the first fresh air duct 21.

[0041] The coating oven apparatus has a first direction Z, a second direction Y, and a third direction X that are perpendicular to each other. The first direction Z is the height direction of the coating oven apparatus, the second direction Y is the length direction of the coating oven apparatus, and the third direction X is the width direction of the coating oven apparatus.

[0042] In this embodiment, the arrangement direction of the first accelerated drying zone 111, the first uniform drying zone 112, and the first deceleration drying zone 113 of the first housing 11 is opposite to the arrangement direction of the second accelerated drying zone 121, the second uniform drying zone 122, and the second deceleration drying zone 123 of the second housing 12. Specifically, along the first direction Z, the positions of the first accelerated drying zone 111 and the second deceleration drying zone 123 correspond, the positions of the first uniform drying zone 112 and the second uniform drying zone 122 correspond, and the positions of the first deceleration drying zone 113 and the second accelerated drying zone 121 correspond.

[0043] See Figures 1-3 The coating oven device provided in this embodiment of the present invention also includes a first return air valve 51. The first return air duct 41 is equipped with the first return air valve 51, which is used to regulate the flow rate of hot air delivered to the first fresh air duct 21 via the first return air duct 41. By setting the first return air valve 51 in the first return air duct 41, the first return air valve 51 can dynamically adjust its opening according to the solvent evaporation rate and the hot air status, recovering and utilizing as much waste heat as possible in the low-concentration exhaust air while ensuring drying efficiency, further reducing the energy consumption required for fresh air heating and enhancing energy-saving effects. When an abnormal increase in solvent concentration is detected in the return air, the first return air valve 51 can be adjusted or closed to prevent high-concentration solvent gas from flowing back to the front end area, thereby avoiding safety hazards and improving the safety and reliability of the coating oven device.

[0044] Opening degree refers to the extent to which a valve is open, typically used to describe the flow area or flow control state of a valve at a certain position between closed and fully open. When a valve is completely closed, its opening degree is 0%; when it is fully open, the opening degree is 100%; if the valve is only half open, then the opening degree is 50%. Therefore, by adjusting the opening degree of the first return air valve 51, the flow rate of hot air discharged from the second exhaust duct 32 and delivered to the first fresh air duct 21 via the first return air duct 41 can be adjusted.

[0045] The coating oven device also includes a second exhaust valve 56 and a first fresh air valve 53. The second exhaust duct 32 is equipped with the second exhaust valve 56. The input end of the first return air duct 41 is located between the second exhaust valve 56 and the second chamber 12, that is, the input end of the first return air duct 41 is located between the second exhaust valve 56 and the input end of the first exhaust duct 31. The first fresh air duct 21 is equipped with the first fresh air valve 53. The output end of the first return air duct 41 is located between the first fresh air valve 53 and the first chamber 11, that is, the output end of the first return air duct 41 is located between the first fresh air valve 53 and the output end of the first fresh air duct 21.

[0046] By setting the first fresh air valve 53, the second exhaust air valve 56, and the first return air valve 51 respectively, the fresh air volume entering the first fresh air duct 21, the exhaust gas volume discharged from the second exhaust air duct 32, and the return air volume recycled by the first return air duct 41 can be adjusted independently, thereby achieving precise control of the hot air circulation system from the first accelerated drying zone 111 to the second deceleration drying zone 123, and improving the control accuracy of temperature, humidity, and solvent concentration.

[0047] Since the input end of the first return air duct 41 is located between the second exhaust valve 56 and the second housing 12, and the output end of the first return air duct 41 is located between the first fresh air valve 53 and the first housing 11, the low solvent concentration hot air discharged from the second deceleration drying zone 123 can be directly returned to the first accelerated drying zone 111 for use without being diluted in large quantities, so as to recover waste heat to the greatest extent and reduce heating energy consumption.

[0048] Meanwhile, by reasonably controlling the opening of each valve, the air distribution ratio can be flexibly adjusted under different working conditions to avoid high-concentration solvent gas flowing back to the front end area and prevent safety hazards; at the same time, it also helps to maintain stable hot air conditions in each drying section and ensure the consistency of electrode drying quality.

[0049] The coating oven apparatus also includes a first solvent concentration detector 54. The first fresh air duct 21 is equipped with the first solvent concentration detector 54, which is located between the output end of the first return air duct 41 and the output end of the first fresh air duct 21. By setting up the first solvent concentration detector 54, the solvent concentration in the air returning from the first return air duct 41 to the first fresh air duct 21 and mixing with the fresh air can be accurately determined. This provides crucial feedback information to the controller of the coating oven apparatus, thereby preventing excessively high solvent concentration in the return air from affecting drying efficiency or causing safety hazards.

[0050] This coating oven unit uses a PLC controller (programmable logic controller) to link with electric air valves (such as fresh air valve, exhaust air valve and return air valve) to achieve intelligent adjustment of fresh air, return air and exhaust air; the entire control system has two operating modes: closed-loop control mode and manual control mode, which can be flexibly switched according to actual working conditions.

[0051] I. Manual Control Mode: In manual mode, the operator presets the opening values ​​of the first fresh air valve 53, the second exhaust air valve 56, and the first return air valve 51 based on current process conditions, equipment operating status, and historical experience. This mode is suitable for the following situations: the initial stage of equipment startup when the system is not yet stable; the regular production stage with fixed process parameters and stable operating status; during the maintenance or repair of testing instruments; and the debugging stage where manual intervention is required to verify the impact of different valve openings on the drying effect. In this mode, each electric air valve operates at the preset fixed opening. The system does not automatically adjust the solvent concentration or other dynamic parameters, but it still retains the PLC monitoring function. Once an abnormality is detected (such as excessively high solvent concentration), the system can issue an alarm signal and prompt the operator to intervene.

[0052] II. Closed-Loop Control Mode: In closed-loop mode, the system achieves fully automatic control through sensor feedback signals. This primarily relies on the first solvent concentration detector 54 installed on the first fresh air duct 21 to monitor the solvent concentration in the mixed air entering the first accelerated drying zone 111 in real time. Based on this concentration data, and combined with preset safety thresholds and energy-saving optimization strategies, the PLC controller dynamically adjusts the opening of the following three key valves: the first fresh air valve 53 is used to control the amount of fresh air introduced.

[0053] The second exhaust valve 56 is used to control the flow rate of exhaust gas discharged from the second deceleration drying zone 123, and the first return air valve 51 is used to control the amount of hot air recovered from the second deceleration drying zone 123 to the first acceleration drying zone 111.

[0054] The specific workflow of closed-loop control is as follows:

[0055] Data acquisition: The first solvent concentration detector 54 continuously detects the solvent concentration in the mixed air and transmits the signal to the PLC controller;

[0056] Judgment and Decision: If the solvent concentration is within a safe range, the PLC controller maintains the current return air ratio to recover as much heat as possible and improve energy efficiency; if the solvent concentration is close to the upper limit threshold, the PLC controller gradually reduces the opening of the first return air valve 51 and increases the opening of the first fresh air valve 53 to reduce the solvent concentration in the mixed air; if the solvent concentration exceeds the safe threshold, the PLC controller immediately closes the first return air valve 51, cuts off the return air path, and increases the exhaust volume to prevent high-concentration solvent gas from entering the front-end drying area.

[0057] Action execution: The PLC controller sends control commands to each electric air valve, adjusting its opening degree in real time to ensure that the system always operates in a safe and efficient state;

[0058] Feedback regulation: The system continuously monitors changes in solvent concentration, forming a closed-loop regulation to achieve dynamic equilibrium.

[0059] The two modes complement each other. The manual mode provides basic operational support for the system, and is especially suitable for non-steady-state conditions or equipment commissioning. The closed-loop mode realizes automated and intelligent operation, which not only improves the energy-saving effect of the system, but also enhances the safety and stability of operation, while reducing the need for manual intervention and improving production efficiency.

[0060] For example, there are multiple second-row air ducts 32, multiple first fresh air ducts 21, and multiple first return air ducts 41; each second-row air duct 32 is connected to a first fresh air duct 21 through a first return air duct 41. With this one-to-one independent connection method, each air path (including one second-row air duct 32, one first return air duct 41, and one first fresh air duct 21) can operate independently without interference. This not only improves the coating oven's responsiveness to different hot air conditions but also provides a hardware foundation for subsequent zonal control and fine-tuning. Since each air path is independently configured, operators can flexibly adjust the return air ratio or air volume distribution of a specific area according to actual process requirements without affecting the normal operation of other areas. Furthermore, during equipment maintenance or partial failure, a single air duct system can be shut down without affecting the continued operation of the entire unit, improving the maintainability and operational continuity of the equipment.

[0061] See Figure 1 , Figure 4 and Figure 5 The exhaust duct 3 also includes a first exhaust duct 31, the input end of which is connected to the first deceleration drying zone 113; the fresh air duct 2 also includes a second fresh air duct 22, the output end of which is connected to the second acceleration drying zone 121; the return air duct 4 also includes a second return air duct 42, the input end of which is connected to the first exhaust duct 31, and the output end of which is connected to the second fresh air duct 22.

[0062] By connecting the input and output ends of the second return air duct 42 to the first exhaust duct 31 and the second fresh air duct 22 respectively, the exhaust air from the first deceleration drying zone 113 can be reintroduced into the second acceleration drying zone 121. This allows the low-solvent-concentration hot air discharged during the deceleration drying stage of the electrode to be reused during the acceleration drying stage of the electrode, thereby achieving the recycling of the low-solvent-concentration hot air in the first deceleration drying zone 113, further reducing heat waste and energy consumption.

[0063] The coating oven device also includes a second return air valve 55. The second return air duct 42 is equipped with the second return air valve 55, which is used to regulate the flow rate of hot air delivered to the second fresh air duct 22 through the second return air duct 42. The second return air valve 55 can dynamically adjust its opening according to the solvent evaporation rate and the hot air status, so as to recover and utilize as much waste heat in the low-concentration exhaust air as possible while ensuring drying efficiency, further reducing the energy consumption required for fresh air heating and enhancing energy-saving effect.

[0064] For example, there are multiple first-row air ducts 31, multiple second-fresh air ducts 22, and multiple second-return air ducts 42; one first-row air duct 31 is connected to one second-fresh air duct 22 through one second-return air duct 42. After adopting a one-to-one independent connection method, each group of air ducts (including one first-row air duct 31, one second-return air duct 42, and one second-fresh air duct) can operate independently without interfering with each other.

[0065] See Figures 1-5 The coating oven apparatus provided in this embodiment of the present invention further includes a first exhaust valve 52 and a second fresh air valve 57. The first exhaust duct 31 is equipped with the first exhaust valve 52. The input end of the second return air duct 42 is located between the first exhaust valve 52 and the first housing 11, that is, the input end of the second return air duct 42 is located between the first exhaust valve 52 and the input end of the first exhaust duct 31. The second fresh air duct 22 is equipped with a second fresh air valve 57. The output end of the second return air duct 42 is located between the second fresh air valve 57 and the second housing 12, that is, the output end of the second return air duct 42 is located between the first fresh air valve 53 and the output end of the first fresh air duct 21.

[0066] The coating oven apparatus also includes a second solvent concentration detector 58. The second fresh air duct 22 is equipped with the second solvent concentration detector 58, which is located between the output end of the second return air duct 42 and the output end of the second fresh air duct 22. By setting the second solvent concentration detector 58, the solvent concentration in the air returning from the second return air duct 42 to the second fresh air duct 22 and mixing with the fresh air can be accurately determined.

[0067] The fresh air duct 2 also includes a third fresh air duct 23, a fourth fresh air duct 24, a first main fresh air duct 25, a second main fresh air duct, a first main fresh air fan 27, and a second main fresh air fan 28.

[0068] The first deceleration drying zone 113 is connected to at least one third fresh air duct 23, the first uniform speed drying zone 112 is connected to at least one third fresh air duct 23, the second deceleration drying zone 123 is connected to at least one fourth fresh air duct 24, and the second uniform speed drying zone 122 is connected to at least one fourth fresh air duct 24.

[0069] The first fresh air main fan 27 is located in the first main fresh air duct 25. The input ends of each fresh air duct (first fresh air duct 21 and third fresh air duct 23) of the first housing 11 are connected to the first main fresh air duct 25. The input end of the first main fresh air duct 25 is connected to the fresh air supply area. Under the action of the first fresh air main fan 27, the first main fresh air duct 25 draws fresh air from the fresh air supply area and distributes the fresh air to each fresh air duct of the first housing 11. Each fresh air duct delivers fresh air to each drying area of ​​the first housing 11.

[0070] The second fresh air main fan 28 is located in the second main fresh air duct 26. The input ends of each fresh air duct (second fresh air duct 22 and fourth fresh air duct 24) of the second housing 12 are connected to the second main fresh air duct 26. The input end of the second main fresh air duct 26 is connected to the fresh air supply area. Under the action of the second fresh air main fan 28, the second main fresh air duct 26 draws fresh air from the fresh air supply area and distributes the fresh air to each fresh air duct of the second housing 12. Each fresh air duct delivers fresh air to each drying area of ​​the second housing 12.

[0071] The exhaust duct 3 also includes a third exhaust duct 33, a fourth exhaust duct 34, a first main exhaust duct 35, a second main exhaust duct 36, a first main exhaust fan 37, and a second main exhaust fan 38.

[0072] The first uniform drying zone 112 is connected to at least one third air duct 33, and the first accelerated drying zone 111 is connected to at least one third air duct 33; the second uniform drying zone 122 is connected to at least one fourth air duct 34, and the second accelerated drying zone 121 is connected to at least one fourth air duct 34.

[0073] The first exhaust fan 37 is located in the first main exhaust duct 35. The output ends of each exhaust duct of the first housing 11 (the first exhaust duct 31 and the third exhaust duct 33) are connected to the first main exhaust duct 35. The exhaust air from each drying zone of the first housing 11 (the first deceleration drying zone 113, the first uniform speed drying zone 112 and the first acceleration drying zone 111) is collected by each exhaust duct and sent to the first main exhaust duct 35. Then, under the action of the first exhaust fan 37, it is discharged to the predetermined discharge area.

[0074] The second exhaust fan 38 is located in the second main exhaust duct 36. The output ends of each exhaust duct of the second housing 12 (the second exhaust duct 32 and the fourth exhaust duct 34) are connected to the second main exhaust duct 36. The exhaust air from each drying zone of the second housing 12 (the second deceleration drying zone 123, the second uniform speed drying zone 122, and the second acceleration drying zone 121) is collected by each exhaust duct and sent to the second main exhaust duct 36. Then, under the action of the second exhaust fan 38, it is discharged to the predetermined discharge area.

[0075] The coating oven apparatus further includes a first heat exchanger 61 and a second heat exchanger 62; the first heat exchanger 61 is connected to the first main exhaust duct 35 and the first main fresh air duct 25 and is adapted to heat the fresh air of the first main fresh air duct 25 using the exhaust air from the first main exhaust duct 35. The second heat exchanger 62 is connected to the second main exhaust duct 36 and the second main fresh air duct 26 and is adapted to heat the fresh air of the second main fresh air duct 26 using the exhaust air from the second main exhaust duct 36.

[0076] See Figures 6-7 The second housing 12 is located on one side of the first housing 11 in the first direction Z; along the first direction Z, the second deceleration drying zone 123 and the first acceleration drying zone 111 at least partially overlap. This avoids the problem of excessively long overlapping pipes, thus simplifying the duct connection structure of the first fresh air duct 21, the first return air duct 41, and the second exhaust air duct 32, and reducing heat loss during transport. For example, in the overlapping area of ​​the second deceleration drying zone 123 and the first acceleration drying zone 111 along the first direction Z, the first fresh air duct 21 and the second exhaust air duct 32 can be extended along the first direction Z, and then connected to the two ends of the first return air duct 41 extending along the second direction Y, respectively, to achieve an "I"-shaped overlap of the first fresh air duct 21, the first return air duct 41, and the second exhaust air duct 32. The overlapping pipes are shorter, the duct connection structure is simpler, and heat loss during transport is reduced.

[0077] The first fresh air duct 21 extends at least partially along the first direction Z, the second exhaust duct 32 extends at least partially along the first direction Z, and the first return air duct 41 extends at least partially along the second direction Y. The first return air duct 41 is connected to the first fresh air duct 21 and the second exhaust duct 32 at opposite ends in the second direction Y, respectively. In this way, the interconnected duct sections (first fresh air duct 21, first return air duct 41, and second exhaust duct 32) can be set in the same vertical position (i.e., aligned in the height direction of the equipment), thereby avoiding the problem of increased duct length due to misalignment and overlap. This allows the low solvent concentration hot air discharged from the second deceleration drying zone 123 to be transported to the first accelerated drying zone 111 via a shorter path through the second exhaust duct 32, the first return air duct 41, and the first fresh air duct 21, reducing the duct overlap length and minimizing heat loss during transport.

[0078] Preferably, along the first direction Z, the first deceleration drying zone 113 and the second acceleration drying zone 121 at least partially overlap. This avoids the problem of excessively long overlapping pipes, thereby simplifying the duct connection structure of the second fresh air duct 22, the second return air duct 42, and the first exhaust air duct 31, and reducing heat loss during the transportation process.

[0079] It should be noted that, along the first direction Z, the second deceleration drying zone 123 of the second housing 12 and the first acceleration drying zone 111 of the first housing 11 at least partially overlap, meaning that the orthographic projection ranges of the second deceleration drying zone 123 of the second housing 12 and the first acceleration drying zone 111 of the first housing 11 partially or completely overlap on a plane perpendicular to the first direction Z. For example, if the first direction Z is perpendicular to the first plane, then the orthographic projection ranges of the second deceleration drying zone 123 of the second housing 12 and the first acceleration drying zone 111 of the first housing 11 partially or completely overlap on the first plane. Similarly, the second acceleration drying zone 121 of the second housing 12 and the first deceleration drying zone 113 of the first housing 11 at least partially overlap, meaning that the orthographic projection ranges of the second acceleration drying zone 121 of the second housing 12 and the first deceleration drying zone 113 of the first housing 11 partially or completely overlap on a plane perpendicular to the first direction Z.

[0080] Secondly, this utility model also provides a coating machine, which includes a coating oven device according to any one of the above claims.

[0081] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present utility model, and these improvements and substitutions should also be considered within the protection scope of the present utility model.

Claims

1. A coating oven apparatus, characterized in that, include: The first box (11) has a first accelerated drying zone (111), a first uniform drying zone (112) and a first deceleration drying zone (113) arranged in sequence. The second chamber (12) has a second accelerated drying zone (121), a second uniform drying zone (122) and a second deceleration drying zone (123) arranged in sequence. Fresh air duct (2), the fresh air duct (2) includes a first fresh air pipe (21), the output end of the first fresh air pipe (21) is connected to the first accelerated drying zone (111); The exhaust duct (3) includes a second exhaust pipe (32), the input end of which is connected to the second deceleration drying zone (123); The return air duct (4) includes a first return air pipe (41), the input end of which is connected to the second exhaust air pipe (32), and the output end of which is connected to the first fresh air pipe (21).

2. The coating oven apparatus according to claim 1, characterized in that, It has a first direction (Z); the second housing (12) is located on one side of the first housing (11) in the first direction (Z); along the first direction (Z), the second deceleration drying zone (123) and the first acceleration drying zone (111) at least partially overlap.

3. The coating oven apparatus according to claim 2, characterized in that, It also has a second direction (Y) perpendicular to the first direction (Z), the first fresh air duct (21) extends at least partially along the first direction (Z), the second exhaust air duct (32) extends at least partially along the first direction (Z), the first return air duct (41) extends at least partially along the second direction (Y), and the first return air duct (41) is connected to the first fresh air duct (21) and the second exhaust air duct (32) at opposite ends of the second direction (Y).

4. The coating oven apparatus according to claim 1, characterized in that, It also includes a first return air valve (51), which is provided on the first return air duct (41). The first return air valve (51) is used to regulate the flow rate of hot air delivered to the first fresh air duct (21) via the first return air duct (41).

5. The coating oven apparatus according to claim 4, characterized in that, It also includes a second exhaust valve (56) and a first fresh air valve (53). The second exhaust pipe (32) is equipped with the second exhaust valve (56). The input end of the first return air pipe (41) is located between the second exhaust valve (56) and the second housing (12). The first fresh air pipe (21) is equipped with the first fresh air valve (53). The output end of the first return air pipe (41) is located between the first fresh air valve (53) and the first housing (11).

6. The coating oven apparatus according to claim 5, characterized in that, It also includes a first solvent concentration detector (54), which is provided on the first fresh air duct (21). The first solvent concentration detector (54) is located between the output end of the first return air duct (41) and the output end of the first fresh air duct (21).

7. The coating oven apparatus according to any one of claims 1-6, characterized in that, There are multiple second exhaust ducts (32), multiple first fresh air ducts (21), and multiple first return air ducts (41); A second exhaust duct (32) is connected to a first fresh air duct (21) via a first return air duct (41).

8. The coating oven apparatus according to claim 1, characterized in that, The exhaust duct (3) also includes a first exhaust duct (31), the input end of which is connected to the first deceleration drying zone (113); The fresh air duct (2) also includes a second fresh air duct (22), the output end of which is connected to the second accelerated drying zone (121); The return air duct (4) also includes a second return air duct (42), the input end of which is connected to the first exhaust duct (31), and the output end of which is connected to the second fresh air duct (22).

9. The coating oven apparatus according to claim 8, characterized in that, It also includes a second return air valve (55), which is provided on the second return air duct (42). The second return air valve (55) is used to regulate the flow rate of hot air delivered to the second fresh air duct (22) via the second return air duct (42).

10. A coating machine, characterized in that, Includes the coating oven apparatus according to any one of claims 1-9.

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