Air nozzle

Abstract

The air nozzle comprises a shell, a first air uniformizing plate and an air return part are arranged in the shell, an air inlet cavity is formed in the shell, and the first air uniformizing plate and the air return part are both arranged in the air inlet cavity; a second air uniformizing plate is arranged in the air return part, an air return cavity is formed in the air return part, the second air uniformizing plate is arranged in the air return cavity, and an air return plate communicated with the air return cavity is formed at the bottom of the air return part; compared with the prior art, through the air return function of the air return part, the problem that the edge of the pole piece is too dry and the center of the pole piece is not dry enough is solved, so that the drying effect on the pole piece is improved, and the drying efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of coating equipment, and particularly relates to an air nozzle. Background Art

[0002] In the production process of lithium batteries, the foil is a key structure for the coating machine to dry the battery electrode sheets. The coating process of lithium-ion battery electrode sheets is mainly as follows: the qualified slurry is evenly coated on the current collector through the coating machine, the substrate is dried by the drying device on the coating machine, and then wound up. The air nozzle structure in the oven has a great influence on the drying efficiency and effect of the electrode sheets. With the rapid development of new energy power lithium-ion batteries, the coating width is continuously increasing, so the requirements for the drying effect are also getting higher and higher. In the production of battery electrode sheets, the requirements for coating production capacity and quality are getting higher and higher. The coating air nozzle is an important device for the drying work of the coating machine. The coating air nozzle is installed on the upper and lower sides of the oven with the electrode sheets to be dried, and is used to direct the dry air in the oven onto the substrate to be dried, so that the dry air can dry the slurry on the substrate.

[0003] Chinese Patent with Application No. 202320293711.7 discloses an air nozzle and an air nozzle module for a coating machine oven. The above-mentioned disclosed air nozzle includes an outer shell and an inner shell. The outer shell includes an open end, and the open end has a first side wall. The inner shell is placed inside the outer shell, and ventilation channels are respectively formed between the two sides of the inner shell and the first side wall of the open end; the inner shell and the first side wall are connected by a plurality of support members, and the support members on both sides of the inner shell are arranged staggeredly. Chinese Patent with Application No. 202010859361.7 discloses a uniform air nozzle and its oven. The above-mentioned disclosed air nozzle includes an air nozzle housing connected to the oven air cavity and a first air distribution plate arranged on the air nozzle housing; a second air distribution plate is arranged at the connection between the air nozzle housing and the oven air cavity. The air flow direction P in the oven air cavity is substantially parallel to the first air distribution plate. After the air flow in the air nozzle housing passes through the second air distribution plate, an air nozzle air flow direction K that is not perpendicular to the air flow direction P in the oven air cavity is formed in the air distribution cavity C composed of the second air distribution plate and the first air distribution plate; the second air distribution plate protrudes towards the oven air cavity or is recessed between the oven air cavity and the air nozzle housing, and the second air distribution plate is a transitional structure.

[0004] In the above-mentioned disclosed prior art, the air is evenly blown onto the electrode sheet by arranging the first air distribution plate and the second air distribution plate in the housing to realize the drying of the electrode sheet. The above-mentioned air nozzle has only a single air inlet function, and the air outlet of this air nozzle blows the air from two concentrated slits onto the electrode sheet. This method will cause the edge of the electrode sheet to be over-dried while the center is insufficiently dried, and the air blown out from the air outlet acts on the electrode sheet, resulting in too high air pressure on the upper surface of the electrode sheet, which is likely to damage the electrode sheet. Summary of the Utility Model

[0005] The present utility model is to overcome the defects in the above-mentioned prior art, and provides an air nozzle with functions of air inlet and air return, which can ensure uniform drying of the electrode sheet and will not damage the electrode sheet.

[0006] To achieve the above-mentioned utility model purpose, the present utility model adopts the following technical solutions: An air nozzle includes a housing. A first air distribution plate and an air return member are arranged in the housing, and an air inlet cavity is formed in the housing. The first air distribution plate and the air return member are both arranged in the air inlet cavity. A second air distribution plate is arranged in the air return member, and an air return cavity is formed in the air return member. The second air distribution plate is arranged in the air return cavity, and an air return plate communicating with the air return cavity is formed at the bottom of the air return member.

[0007] As a preferred scheme of the present utility model, the housing includes two oppositely arranged side plates. A top plate is arranged at the top of the side plates, and a first end plate and a second end plate connected to the side plates are arranged at both ends of the side plates. The side plates, the top plate, the first end plate and the second end plate are connected to form the air inlet cavity.

[0008] As a preferred scheme of the present utility model, the air inlet cavity includes a first air inlet cavity and a second air inlet cavity. The first air inlet cavity is located above the first air distribution plate, the second air inlet cavity is located below the first air distribution plate, and the second air inlet cavity is located on opposite sides of the air return member.

[0009] As a preferred scheme of the present utility model, an air inlet communicating with the first air inlet cavity is formed at the end of the housing, and an air outlet communicating with the second air inlet cavity is formed at the bottom of the housing.

[0010] As a preferred scheme of the present utility model, the air outlets are arranged on opposite sides of the housing, the air outlets are arranged along the length direction of the housing, and the air outlets are located between the air return member and the housing.

[0011] As a preferred scheme of the present utility model, the first air distribution plate is arranged along the length direction of the housing, and the first air distribution plate is located above the air return member. A plurality of first ventilation holes for communicating the first air inlet cavity and the second air inlet cavity are formed on the first air distribution plate.

[0012] As a preferred scheme of the present utility model, the air return cavity includes a first air return cavity and a second air return cavity. The first air return cavity is located above the second air distribution plate, and the second air return cavity is located below the second air distribution plate.

[0013] As a preferred scheme of the present utility model, the second air distribution plate is arranged along the length direction of the air return member, and a plurality of second ventilation holes for communicating the first air return cavity and the second air return cavity are formed on the second air distribution plate.

[0014] As a preferred embodiment of the present utility model, an air return outlet communicating with the first air return cavity is formed on the first end plate, and air return inlets communicating with the second air return cavity are formed on both the first end plate and the second end plate.

[0015] As a preferred embodiment of the present utility model, the air return plate is arranged along the length direction of the air return member, and a plurality of air return holes communicating with the second air return cavity are formed on the air return plate.

[0016] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0017] 1. By providing the first air distribution plate in the air inlet cavity of the housing, the air flow blows towards the pole piece through the first air distribution plate, ensuring the uniformity of the air outlet. At the same time, an air return member is arranged in the housing, and an air return plate is provided at the bottom of the air return member. The air flow above the pole piece enters the air return member through the air return plate, thus ensuring that the air pressure above the pole piece is in a stable state, preventing the air flow from damaging the pole piece. In addition, a second air distribution plate is arranged in the air return member to ensure the uniformity of the air return. Meanwhile, through the air return function of the air return member, the problem that the edge of the pole piece is too dry while the center is insufficiently dried is improved, thereby enhancing the drying effect on the pole piece and further improving the drying efficiency.

[0018] 2. Further, a first air return cavity and a second air return cavity are provided in the air return member. Air return holes communicating with the second air return cavity are provided on the air return plate, air return inlets communicating with the second air return cavity are provided on the first end plate and the second end plate, and an air return outlet is provided on the first end plate. The air return inlets cooperate with the air return holes to recover the air flow above the pole piece and discharge it through the air return outlet, improving the air return efficiency, enhancing the fluidity of the air flow, and further ensuring the drying effect at the center of the pole piece. Description of the Drawings

[0019] Figure 1 is a schematic structural diagram of the present utility model;

[0020] Figure 2 is a schematic structural diagram of the interior of the housing of the present utility model;

[0021] Figure 3 is a schematic structural diagram of the air return outlet of the present utility model;

[0022] Figure 4 is a cross-sectional view of the present utility model

[0023] Reference numerals: housing 1, side plate 101, top plate 102, first end plate 103, second end plate 104, air inlet 105, air outlet 106, air return member 2, second air distribution plate 201, second ventilation hole 2011, air return plate 202, air return hole 2021, air return cavity 203, first air return cavity 2031, second air return cavity 2032, air return outlet 204, air return inlet 205, first air distribution plate 3, first ventilation hole 301, air inlet cavity 4, first air inlet cavity 401, second air inlet cavity 402. Detailed implementation manner

[0024] The embodiments of the present utility model will be described in detail below with reference to the accompanying drawings.

[0025] As Figures 1-4 shown, a nozzle includes a housing 1. A first air distribution plate 3 and an air return member 2 are provided inside the housing 1. An air inlet cavity 4 is formed inside the housing 1. The first air distribution plate 3 and the air return member 2 are both arranged in the air inlet cavity 4. A second air distribution plate 201 is provided in the air return member 2, and an air return cavity 203 is formed in the air return member 2. The second air distribution plate 201 is arranged in the air return cavity 203. An air return plate 202 communicating with the air return cavity 203 is formed at the bottom of the air return member 2.

[0026] Furthermore, both the first air distribution plate 3 and the air return member 2 are arranged along the length direction of the housing 1, and the air return member 2 is located at the bottom of the housing 1. The air flow enters the air inlet cavity 4 and is evenly blown out through the first air distribution plate 3, ensuring the uniformity of the air outlet. In addition, the air flow above the pole piece is recovered through the air return member 2, thereby reducing the air pressure between the pole piece and the nozzle, avoiding damage to the pole piece caused by the air flow. At the same time, under the action of the air return member 2, the fluidity of the air flow is increased, and thus the drying effect on the central part of the pole piece is improved.

[0027] The housing 1 includes two relatively arranged side plates 101. A top plate 102 is provided at the top of the side plate 101. First end plate 103 and second end plate 104 connected to the side plate 101 are provided at both ends of the side plate 101. The side plate 101, the top plate 102, the first end plate 103 and the second end plate 104 are connected to form the air inlet cavity 4. Further, the two side plates 101 are arranged in parallel. The top plate 102 is arranged along the length direction of the side plate 101. The first end plate 103 and the second end plate 104 are located at the ends of the side plate 101 and the top plate 102. The space surrounded by the connection of the side plate 101, the top plate 102, the first end plate 103 and the second end plate 104 is the air inlet cavity 4. The air return member 2 is located at the bottom of the air inlet cavity 4.

[0028] The air inlet cavity 4 includes a first air inlet cavity 401 and a second air inlet cavity 402. The first air inlet cavity 401 is located above the first air distribution plate 3, and the second air inlet cavity 402 is located below the first air distribution plate 3. Moreover, the second air inlet cavity 402 is located on the opposite sides of the air return member 2. Further, the first air inlet cavity 401 and the second air inlet cavity 402 are distributed along the height direction of the housing 1. An air inlet 105 communicating with the first air inlet cavity 401 is formed at the end of the housing 1. The air flow enters the first air inlet cavity 401 through the air inlet 105, and then enters the second air inlet cavity 402 through the first air distribution plate 3. At this time, the air flow in the second air inlet cavity 402 has better uniformity under the action of the first air distribution plate 3.

[0029] An air outlet 106 communicating with the second air inlet cavity 402 is formed at the bottom of the housing 1. Further, the air outlets 106 are arranged on the opposite sides of the housing 1. The air outlets 106 are arranged along the length direction of the housing 1, and the air outlets 106 are located between the air return member 2 and the housing 1. Specifically, a gap is formed between the outer wall of the air return member 2 and the side plate 101 of the housing 1, and this gap is the air outlet 106. The air flow in the second air inlet cavity 402 blows towards the pole piece through the air outlet 106.

[0030] The first air distribution plate 3 is arranged along the length direction of the housing 1, and the first air distribution plate 3 is located above the air return member 2. A number of first ventilation holes 301 for communicating the first air inlet cavity 401 and the second air inlet cavity 402 are formed on the first air distribution plate 3. Further, a number of the first ventilation holes 301 are arranged on the opposite sides of the first air distribution plate 3, that is, a number of first ventilation holes 301 are located above the second air inlet cavity 402. The air flow enters the second air inlet cavity 402 from the first air inlet cavity 401 through the first ventilation holes 301. At the same time, a number of first ventilation holes 301 are evenly distributed, and the air flow entering the second air inlet cavity 402 through a number of first ventilation holes 301 has better uniformity.

[0031] The air return cavity 203 includes a first air return cavity 2031 and a second air return cavity 2032. The first air return cavity 2031 is located above the second air distribution plate 201, and the second air return cavity 2032 is located below the second air distribution plate 201. Further, the first air return cavity 2031 and the second air return cavity 2032 are distributed along the height direction of the air return member 2. The air return plate 202 is arranged along the length direction of the air return member 2. A number of air return holes 2021 communicating with the second air return cavity 2032 are formed on the air return plate 202. The distribution density of a number of air return holes 2021 gradually decreases from the middle to both ends along the length direction of the air return plate 202. The air flow between the pole piece and the air nozzle enters the second air return cavity 2032 through the air return holes 2021. An air return inlet 205 communicating with the second air return cavity 2032 is formed on both the first end plate 103 and the second end plate 104. The air flow above the pole piece also enters the second air return cavity 2032 from the air return inlet 205 at the same time.

[0032] The second air distribution plate 201 is arranged along the length direction of the air return member 2. A plurality of second ventilation holes 2011 for communicating the first air return cavity 2031 and the second air return cavity 2032 are formed on the second air distribution plate 201. Further, the plurality of second ventilation holes 2011 are evenly distributed on the second air distribution plate 201. The air flow in the second air return cavity 2032 enters the first air return cavity 2031 through the second ventilation holes 2011. At the same time, under the action of the plurality of second ventilation holes 2011, the uniformity of the air flow entering the first air return cavity 2031 is better.

[0033] An air return outlet 204 communicating with the first air return cavity 2031 is formed on the first end plate 103. Further, the air return outlet 204 is located above the air return inlet 205. The air flow in the first air return cavity 2031 is discharged through the air return outlet 204.

[0034] As Figure 4 shown, air inlet passage: The gas enters the first air inlet cavity 401 through the air inlet 105, and then flows into the second air inlet cavities 402 on both sides of the air return member 2 through the first air distribution plate 3, and finally blows to the pole piece through the air outlet 106.

[0035] Air return passage: The gas enters the second air return cavity 2032 through the air return inlet 205 and the air return holes 2021, then enters the first air return cavity 2031 through the second air distribution plate 201, and finally flows out through the air return outlet 204.

[0036] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

[0037] Although terms such as the housing 1, the side plate 101, the top plate 102, the first end plate 103, the second end plate 104, the air inlet 105, the air outlet 106, the air return member 2, the second air distribution plate 201, the second ventilation holes 2011, the air return plate 202, the air return holes 2021, the air return cavity 203, the first air return cavity 2031, the second air return cavity 2032, the air return outlet 204, the air return inlet 205, the first air distribution plate 3, the first ventilation holes 301, the air inlet cavity 4, the first air inlet cavity 401, the second air inlet cavity 402, etc. are used more frequently in this article, the possibility of using other terms is not excluded. These terms are only used to more conveniently describe and explain the essence of the present invention. Interpreting them as any additional limitation is contrary to the spirit of the present invention.

Claims

1. A tuyere, comprising a housing (1), characterized in that: The shell (1) is provided with a first air leveling plate (3) and an air return member (2), an air inlet cavity (4) is formed in the shell (1), and the first air leveling plate (3) and the air return member (2) are both arranged in the air inlet cavity (4); the air return member (2) is provided with a second air leveling plate (201), and an air return cavity (203) is formed in the air return member (2), the second air leveling plate (201) is arranged in the air return cavity (203), and a air return plate (202) connected to the air return cavity (203) is formed at the bottom of the air return member (2).

2. The air nozzle according to claim 1, characterized in that: The shell (1) comprises two side panels (101) arranged opposite to each other, a top panel (102) being provided on the top of the side panel (101), and a first end panel (103) and a second end panel (104) being provided at both ends of the side panel (101) and being connected to the side panel (101); the side panel (101), the top panel (102), the first end panel (103) and the second end panel (104) are connected to form an air inlet chamber (4).

3. The air nozzle according to claim 1, characterized in that: The air inlet chamber (4) comprises a first air inlet chamber (401) and a second air inlet chamber (402), wherein the first air inlet chamber (401) is located above the first air uniforming plate (3), the second air inlet chamber (402) is located below the first air uniforming plate (3), and the second air inlet chamber (402) is located on opposite sides of the air return member (2).

4. The air nozzle according to claim 3, characterized in that: An air inlet (105) connected to the first air inlet cavity (401) is formed at the end of the shell (1), and an air outlet (106) connected to the second air inlet cavity (402) is formed at the bottom of the shell (1).

5. The air nozzle according to claim 4, characterized in that: The air outlet (106) is arranged on two opposite sides of the shell (1), the air outlet (106) is arranged along the length direction of the shell (1), and the air outlet (106) is located between the air return member (2) and the shell (1).

6. The air nozzle according to claim 3, characterized in that: The first air leveling plate (3) is arranged along the length direction of the shell (1), and the first air leveling plate (3) is located above the air return member (2). The first air leveling plate (3) is formed with a plurality of first ventilation holes (301) for connecting the first air inlet cavity (401) and the second air inlet cavity (402).

7. The air nozzle according to claim 2, characterized in that: The return air chamber (203) comprises a first return air chamber (2031) and a second return air chamber (2032), wherein the first return air chamber (2031) is located above the second air uniforming plate (201), and the second return air chamber (2032) is located below the second air uniforming plate (201).

8. The air nozzle according to claim 7, characterized in that: The second air leveling plate (201) is arranged along the length direction of the air return member (2), and a plurality of second ventilation holes (2011) for connecting the first air return cavity (2031) and the second air return cavity (2032) are formed on the second air leveling plate (201).

9. The air nozzle according to claim 7, characterized in that: The first end plate (103) is formed with a return air outlet (204) connected to the first return air chamber (2031), and the first end plate (103) and the second end plate (104) are both formed with a return air inlet (205) connected to the second return air chamber (2032).

10. The air nozzle according to claim 7, characterized in that: The return air plate (202) is arranged along the length direction of the return air component (2), and a plurality of return air holes (2021) connected to the second return air cavity (2032) are formed on the return air plate (202).

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