Infrared drying nozzle and oven

Abstract

The utility model discloses an infrared drying air nozzle and oven, this infrared drying air nozzle combines hot -blast drying and infrared drying, and infrared heating plate sets up in second cavity, and the whole infrared drying air nozzle is integral structure, is favorable to reduce the volume. When working, hot -blast imports first cavity from air inlet, then imports second cavity through first through -hole, finally imports slit cavity through second through -hole, then from air outlet blows to the surface of pole piece, and one -way air outlet board sets up in the side of second through -hole towards slit cavity, and only when there is hot -blast input, one -way air outlet board is blown open, and slit cavity communicates with second cavity to avoid the NMP steam that pole piece surface volatilizes and enters second cavity in mass and contacts with infrared heating plate to reduce the explosion risk. The setting of radiating fin can reflect the heat of the back of infrared heating plate to the air inlet, preheat the temperature of intake air, and the airflow input at the air inlet can cool the infrared heating plate, improve the energy utilization rate.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery electrode drying, specifically to an infrared drying nozzle and drying oven. Background Technology

[0002] In the manufacturing process of lithium battery electrodes, the coated wet electrodes need to be rapidly dried in an oven. Traditional lithium battery electrode drying processes mainly rely on a hot air circulation system with nozzles, which directly blows high-speed hot air onto the surface of the wet electrode, evaporating the solvent in the slurry using the principle of convection heat transfer. Since the hot air only acts on the electrode surface, the evaporation rate of the internal solvent is limited by the heat conduction efficiency, easily leading to premature drying and crusting of the surface layer, hindering the escape of the internal solvent, causing the electrode to crack or curl, resulting in poor baking performance. To solve this problem, existing oven technologies introduce a combination of hot air circulation with infrared radiation heating. Infrared radiation directly penetrates the electrode surface to heat the internal slurry, while hot air accelerates the evaporation of the surface solvent.

[0003] However, existing air nozzles and infrared plates are separate structures, requiring separate installation and fixation. This results in bulky equipment. Furthermore, during the drying process, NMP vapor is generated on the electrode surface, directly exposing the infrared plate to this vapor environment. Long-term use can lead to localized NMP vapor accumulation inside the oven exceeding critical concentrations. Combined with localized overheating of the infrared plate, this poses a risk of combustion and explosion. Moreover, the separate structure means the hot air output from the air nozzles operates independently from the infrared plate, preventing effective utilization of heat from the back of the infrared plate, resulting in significant heat loss and increased energy consumption, particularly in high-capacity scenarios where economic efficiency is poor. Utility Model Content

[0004] In order to overcome the shortcomings of the existing technology, this utility model provides an infrared drying nozzle and an oven, which can solve the problems of existing ovens being bulky, having an explosion risk, and having low energy utilization.

[0005] The technical solution adopted by this utility model to solve its technical problem is as follows: On the one hand, an infrared drying nozzle is provided, including a shell, heat dissipation fins, and an infrared heating plate; the shell is provided with an air inlet and a transparent panel, the air inlet and the transparent panel are arranged opposite to each other; the heat dissipation fins include a heat dissipation main plate and two heat dissipation side plates respectively connected to both sides of the heat dissipation main plate, the heat dissipation main plate is arranged near the air inlet and divides the shell into a first cavity and a second cavity, the heat dissipation side plates and the side wall of the shell enclose a slit cavity with an air outlet, the infrared heating plate is arranged in the second cavity, and the heating surface of the infrared heating plate faces the transparent panel; the heat dissipation main plate is provided with a first through hole, the first cavity and the second cavity are connected through the first through hole, the heat dissipation side plate is provided with a second through hole, the second cavity and the slit cavity are connected through the second through hole, and a one-way air outlet plate floats and covers the side of the second through hole facing the slit cavity.

[0006] As a further improvement to the above technical solution, a pressure plate is provided on the side of the heat dissipation side plate away from the heat dissipation main board. The pressure plate is sealed to the heat dissipation side plate through a sealing gasket. The side edge of the transparent panel is interference-fitted with the sealing gasket, and a gap is provided between the transparent panel and the infrared heating plate.

[0007] As a further improvement to the above technical solution, a flow guide plate is provided on the inner side of the housing. One side of the flow guide plate is located in the slit cavity, and the other side is sealed between the pressure plate and the sealing gasket.

[0008] As a further improvement to the above technical solution, a magnetic sealing ring is provided between the unidirectional air outlet plate and the heat dissipation side plate.

[0009] As a further improvement to the above technical solution, thermocouples are provided in both the slit cavity and the second cavity.

[0010] As a further improvement to the above technical solution, a side baffle is provided on the outer side of the housing, and a groove is formed between the side baffle and the housing. The thermocouple is connected to a power line, and the power line is located in the groove.

[0011] As a further improvement to the above technical solution, an explosion-proof cable connector is provided at the end of the housing, and the explosion-proof cable connector extends into the second cavity.

[0012] As a further improvement to the above technical solution, it also includes a base that is sealed and connected to the outer shell, the base having an air outlet that communicates with the air inlet, and the two ends of the base having a hook and a pin respectively.

[0013] As a further improvement to the above technical solution, handles are provided at both ends of the outer casing.

[0014] On the other hand, an oven is provided, including a blowing assembly and the aforementioned infrared drying nozzle, the blowing assembly being disposed at the air inlet and used to blow air into the first cavity.

[0015] The beneficial effects of this invention are as follows: This infrared drying nozzle combines hot air drying and infrared drying, and the infrared heating plate is housed in the second cavity. The entire infrared drying nozzle is a single integrated structure, which helps reduce its size. Inside the infrared drying nozzle, hot air enters the first cavity through the air inlet, then enters the second cavity through the first through-hole, and finally enters the slit cavity through the second through-hole. It then blows out of the air outlet onto the electrode surface. Because the one-way air outlet is located on the side of the second through-hole facing the slit cavity, the one-way air outlet is only opened when hot air is input, connecting the slit cavity and the second cavity. This design prevents a large amount of NMP vapor volatilized from the electrode surface from entering the second cavity and contacting the infrared heating plate, thus reducing the risk of explosion. The heat dissipation fins reflect the heat from the back of the infrared heating plate to the air inlet, preheating the intake air temperature. Simultaneously, the airflow entering at the air inlet cools the infrared heating plate, forming a closed-loop thermal cycle and improving energy utilization. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0017] Figure 1 This is a schematic diagram of the structure of the infrared drying nozzle provided in a preferred embodiment of the present invention;

[0018] Figure 2 yes Figure 1 Enlarged view of section A;

[0019] Figure 3 yes Figure 1 Enlarged view of section B;

[0020] Figure 4 This is a cross-sectional view of the infrared drying nozzle provided in a preferred embodiment of the present invention;

[0021] Figure 5 yes Figure 4 Another angle of the sectional view.

[0022] Reference numerals: 1. Outer shell; 2. Heat dissipation fins; 3. Infrared heating plate; 4. Base.

[0023] 11. Air inlet; 12. Transparent panel; 13. First cavity; 14. Second cavity; 15. Slit cavity; 16. Guide side plate; 17. Side baffle; 18. Explosion-proof cable connector; 19. Handle; 21. Heat dissipation main board; 22. Heat dissipation side plate; 23. One-way air outlet; 24. Pressure plate; 40. Air vent; 41. Hook; 42. Pin.

[0024] 141. Thermocouple; 151. Air outlet; 171. Cable tray; 172. Power cord; 211. First through hole; 221. Second through hole; 231. Magnetic sealing ring; 241. Sealing gasket. Detailed Implementation

[0025] The following will clearly and completely describe the concept, specific structure, and technical effects of this utility model in conjunction with embodiments and accompanying drawings, so as to fully understand the purpose, features, and effects of this utility model. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. Other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are all within the scope of protection of this utility model. Furthermore, all connections / connections involved in the patent do not simply refer to direct contact between components, but rather to the ability to form a better connection structure by adding or reducing connecting accessories according to specific implementation conditions. For example, fixed connections / fixed installations can use screw connections, bolt connections, pin connections, key connections, adhesive connections, mortise and tenon connections, welding, riveting, etc., as needed. For detachable connections, screw connections, bolt connections, threaded connections, snap-fit ​​connections, mortise and tenon connections, Velcro connections, etc., can be used as needed. The various technical features in this utility model can be combined interactively without contradicting each other.

[0026] Please see Figure 1 and Figure 4 The preferred embodiment of this utility model provides an infrared drying nozzle, including a shell 1, heat dissipation fins 2, an infrared heating plate 3 and a base 4. The infrared drying nozzle is installed on an oven via the base 4. The infrared heating plate 3 is disposed inside the shell 1. The infrared drying nozzle combines hot air drying and infrared drying. The entire infrared drying nozzle is an integrated structure, which helps to reduce the volume.

[0027] Specifically, the outer casing 1 is provided with an air inlet 11 and a transparent panel 12, which are arranged opposite to each other; the heat dissipation fins 2 include a heat dissipation main board 21 and two heat dissipation side plates 22 respectively connected to both sides of the heat dissipation main board 21. The heat dissipation main board 21 is located near the air inlet 11 and divides the outer casing 1 into a first cavity 13 and a second cavity 14. The heat dissipation side plates 22 and the side wall of the outer casing 1 enclose a slit cavity 15 with an air outlet 151. An infrared heating plate 3 is located in the second cavity 14, and the heating surface of the infrared heating plate 3 faces the transparent panel 12; the heat dissipation main board 21 is provided with a first through hole 211, through which the first cavity 13 and the second cavity 14 are connected. The heat dissipation side plate 22 is provided with a second through hole 221, through which the second cavity 14 and the slit cavity 15 are connected. A one-way air outlet plate 23 floats and covers the side of the second through hole 221 facing the slit cavity 15. Inside the infrared drying nozzle, hot air enters the first cavity 13 through the air inlet 11, then enters the second cavity 14 through the first through-hole 211, and finally enters the slit cavity 15 through the second through-hole 221. It then blows onto the electrode surface from the air outlet 151. Since the one-way air outlet 23 is located on the side of the second through-hole 221 facing the slit cavity 15, the one-way air outlet 23 is only opened when hot air is input, connecting the slit cavity 15 and the second cavity 14. When no hot air is input, the second through-hole 221 is closed. This design prevents large amounts of NMP vapor volatilized from the electrode surface from entering the second cavity 14 and contacting the infrared heating plate 3, thus reducing the risk of explosion. The heat dissipation fins 2 reflect the heat from the back of the infrared heating plate 3 to the air inlet 11, preheating the intake air temperature. Simultaneously, the airflow entering through the air inlet 11 cools the infrared heating plate 3, forming a closed-loop thermal cycle and improving energy utilization.

[0028] Please see Figure 4 A pressure plate 24 is provided on the side of the heat dissipation side plate 22 away from the heat dissipation main plate 21. The pressure plate 24 is sealed to the heat dissipation side plate 22 through a sealing gasket 241. The side edge of the transparent panel 12 is interference-fitted with the sealing gasket 241, and the transparent panel 12 is sealed to the pressure plate 24 to prevent NMP vapor from entering the second cavity 14 from the connection between the two. Furthermore, a gap is provided between the transparent panel 12 and the infrared heating plate 3 to prevent NMP vapor from directly contacting the high-temperature heating surface of the infrared heating plate 3, reducing the risk of explosion. In this embodiment, the transparent panel 12 is a transparent glass panel, which facilitates the passage of rays from the infrared heating plate 3 to ensure the efficiency of the infrared drying electrode.

[0029] The inner side of the outer casing 1 is provided with a flow guide plate 16. One side of the flow guide plate 16 is located inside the slit cavity 15, and the other side is sealed between the pressure plate 24 and the sealing gasket 241. The flow guide plate 16 can further narrow the slit cavity 15, ensure the continuity of air outlet in the slit cavity 15, provide a certain buoyancy for the electrode sheet to travel, and at the same time have high drying efficiency.

[0030] In this embodiment, a magnetic sealing ring 231 is provided between the one-way air outlet plate 23 and the heat dissipation side plate 22. After gas is introduced into the air inlet 11, the generated air pressure can force open the one-way air outlet plate 23. Due to the presence of the one-way airflow, the NMP vapor volatilized on the electrode surface flows elsewhere with the one-way airflow to prevent NMP vapor from entering the second cavity 14. When the gas input at the air inlet 11 stops, under the action of the magnetic sealing ring 231, the one-way air outlet plate 23 can cover the second through hole 221 to achieve the sealing of the second cavity 14.

[0031] Please see Figure 5 Thermocouples 141 are installed in both the slit cavity 15 and the second cavity 14. The two thermocouples 141 are linked and adjusted to dynamically adjust the airflow size of the air inlet 11 and the heat radiation of the infrared heating plate 3 according to the air outlet temperature, so as to achieve dynamic matching of heat source, ensure temperature uniformity, and improve the stability of electrode drying and curing quality.

[0032] Please see Figure 4 A side baffle 17 is provided on the outer side of the outer casing 1, and a wire groove 171 is formed between the side baffle 17 and the outer casing 1. Thermocouple 141 is connected to a power line 172, which is located in the wire groove 171 to fix thermocouple 141 and power line 172.

[0033] Please see Figure 1 To further reduce the risk of explosion, an explosion-proof cable connector 18 is provided at the end of the outer shell 1, and the explosion-proof cable connector 18 extends into the second cavity 14, which can ensure the safe connection between the infrared heating plate 3 and the thermocouple 141 in the special internal environment of the infrared drying nozzle, and avoid explosion accidents caused by sparks generated by electrical connection.

[0034] Please see Figure 2-3 In this embodiment, the base 4 is sealed to the outer casing 1. The base 4 has an air vent 40 communicating with the air inlet 11. The base 4 has a hook 41 and a pin 42 at each end. The hook 41 engages with the oven, and the pin 42 engages with a pin hole on the oven for easy connection. Please refer to [further details omitted]. Figure 1 Both ends of the outer casing 1 are equipped with handles 19, which facilitates production personnel to pick up and replace the infrared drying nozzle.

[0035] A preferred embodiment of this utility model also provides an oven, including a blowing assembly and an infrared drying nozzle as described in the above embodiment. The blowing assembly is disposed at the air inlet 11 and is used to blow air into the first cavity 13. After the hot air enters the first cavity 13, it is then input into the second cavity 14 through the first through hole 211, and finally input into the slit cavity 15 through the second through hole 221, and then blown onto the electrode surface from the air outlet 151.

[0036] The above is a detailed description of the preferred embodiments of the present utility model. However, the present utility model is not limited to the described embodiments. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present utility model. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. An infrared drying nozzle, characterized in that: The device includes a housing, heat dissipation fins, and an infrared heating plate. The housing has an air inlet and a transparent panel, which are positioned opposite each other. The heat dissipation fins include a main heat dissipation plate and two side heat dissipation plates connected to both sides of the main heat dissipation plate. The main heat dissipation plate is located near the air inlet and divides the housing into a first cavity and a second cavity. The side heat dissipation plates and the side walls of the housing enclose a slit cavity with an air outlet. The infrared heating plate is located in the second cavity, with its heating surface facing the transparent panel. The main heat dissipation plate has a first through hole, through which the first cavity and the second cavity communicate. The side heat dissipation plates have a second through hole, through which the second cavity and the slit cavity communicate. A one-way air outlet plate floats and covers the side of the second through hole facing the slit cavity.

2. The infrared drying nozzle according to claim 1, characterized in that: A pressure plate is provided on the side of the heat dissipation side plate away from the heat dissipation main board. The pressure plate is sealed to the heat dissipation side plate through a sealing gasket. The side edge of the transparent panel is interference-fitted with the sealing gasket, and a gap is provided between the transparent panel and the infrared heating plate.

3. The infrared drying nozzle according to claim 2, characterized in that: The inner side of the housing is provided with a flow guide plate, one side of which is located in the slit cavity, and the other side is sealed between the pressure plate and the sealing gasket.

4. The infrared drying nozzle according to claim 1, characterized in that: A magnetic sealing ring is provided between the unidirectional air outlet plate and the heat dissipation side plate.

5. The infrared drying nozzle according to claim 1, characterized in that: Thermocouples are installed in both the slit cavity and the second cavity.

6. The infrared drying nozzle according to claim 5, characterized in that: A side baffle is provided on the outer side of the housing, and a groove is formed between the side baffle and the housing. The thermocouple is connected to a power line, which is located in the groove.

7. The infrared drying nozzle according to claim 1, characterized in that: An explosion-proof cable connector is provided at the end of the outer casing, and the explosion-proof cable connector extends into the second cavity.

8. The infrared drying nozzle according to claim 1, characterized in that: It also includes a base that is sealed to the outer casing, the base having an air vent that communicates with the air inlet, and hooks and pins at both ends of the base.

9. The infrared drying nozzle according to claim 1, characterized in that: Handles are provided at both ends of the outer casing.

10. An oven, characterized in that: It includes a blowing assembly and an infrared drying nozzle as described in any one of claims 1-9, wherein the blowing assembly is disposed at the air inlet and is used to blow air into the first cavity.

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