CN117073342A - A hot air circulation device for baking battery pole pieces - Google Patents
A hot air circulation device for baking battery pole pieces Download PDFInfo
- Publication number
- CN117073342A CN117073342A CN202311262169.XA CN202311262169A CN117073342A CN 117073342 A CN117073342 A CN 117073342A CN 202311262169 A CN202311262169 A CN 202311262169A CN 117073342 A CN117073342 A CN 117073342A
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- Prior art keywords
- air
- cavity
- oven
- return
- air inlet
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B13/00—Machines and apparatus for drying fabrics, fibres, yarns, or other materials in long lengths, with progressive movement
- F26B13/06—Machines and apparatus for drying fabrics, fibres, yarns, or other materials in long lengths, with progressive movement with movement in a sinuous or zig-zag path
- F26B13/08—Machines and apparatus for drying fabrics, fibres, yarns, or other materials in long lengths, with progressive movement with movement in a sinuous or zig-zag path using rollers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements for supplying or controlling air or other gases for drying solid materials or objects
- F26B21/001—Air generating units, e.g. movable or independent of drying enclosure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements for supplying or controlling air or other gases for drying solid materials or objects
- F26B21/20—Circulating air or gases in closed cycles, e.g. wholly within the drying enclosure
- F26B21/25—Circulating air or gases in closed cycles, e.g. wholly within the drying enclosure partly outside the drying enclosure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements for supplying or controlling air or other gases for drying solid materials or objects
- F26B21/30—Controlling, e.g. regulating, parameters of gas supply
- F26B21/35—Temperature; Pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements for supplying or controlling air or other gases for drying solid materials or objects
- F26B21/30—Controlling, e.g. regulating, parameters of gas supply
- F26B21/37—Velocity of flow; Quantity of flow
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B21/00—Arrangements for supplying or controlling air or other gases for drying solid materials or objects
- F26B21/50—Ducting arrangements from the source of air or other gases to the materials or objects being dried
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
- F26B25/06—Chambers, containers, or receptacles
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Drying Of Solid Materials (AREA)
Abstract
本发明公开了一种电池极片烘烤热风循环装置，包括烘箱、进风组件、回风组件、回风腔体和与进风组件连通的进风腔体，回风组件的一端与回风腔体连通、另一端与进风组件连通，两个进风腔体分别设置于烘箱的相对两侧并与烘箱腔体连通，其中一个进风腔体设置于回风腔体中，回风腔体与烘箱腔体连通设置；该烘烤热风循环装置中的极片受热快且受热均匀，提高了极片的成形质量和效率。
The invention discloses a hot air circulation device for baking battery pole pieces, which includes an oven, an air inlet assembly, a return air assembly, a return air cavity and an air inlet cavity connected to the air inlet assembly. One end of the return air assembly is connected to the return air assembly. The cavity is connected, and the other end is connected with the air inlet component. The two air inlet cavities are respectively arranged on opposite sides of the oven and connected with the oven cavity. One of the air inlet cavities is arranged in the return air cavity, and the return air cavity The body is connected to the oven cavity; the pole pieces in the baking hot air circulation device are heated quickly and evenly, which improves the forming quality and efficiency of the pole pieces.
Description
Technical Field
The invention relates to the technical field of lithium battery preparation, in particular to a battery pole piece baking hot air circulation device.
Background
In the pre-lithium process of the battery, the lithium sheet can not contact with moisture, so that the moisture of the pole piece needs to be dried before pre-lithium, namely baking is needed before slicing/winding, and the moisture is not removed by baking the battery cell which is already in the shell like the traditional method before liquid injection.
Traditional pole piece dehumidification toasts equipment and toasts the time that spends to the electric core that has gone into the shell longer, and toast the inhomogeneous dry time that causes the electric core different positions of in-process electric core in addition for finally toast the pole piece that finishes and appear dehumidification inadequately or dehumidify excessively scheduling problem owing to the inhomogeneous pole piece that causes of being heated, thereby influence the final quality of pole piece.
Disclosure of Invention
Based on the technical problems in the background art, the invention provides a battery pole piece baking hot air circulation device, the pole piece is heated quickly and uniformly, and the forming quality and efficiency of the pole piece are improved.
The invention provides a battery pole piece baking hot air circulation device which comprises a baking oven, an air inlet assembly, an air return cavity and an air inlet cavity communicated with the air inlet assembly, wherein one end of the air return assembly is communicated with the air return cavity, the other end of the air return assembly is communicated with the baking oven cavity, the two air inlet cavities are respectively arranged on two opposite sides of the baking oven and are communicated with the baking oven cavity, one air inlet cavity is arranged in the air return cavity, and the air return cavity is communicated with the baking oven cavity.
Further, the two air inlet cavities are arranged from large to small along the air inlet flow direction, and the air return cavities are arranged from large to small along the air return flow direction.
Further, the air inlet assembly comprises a total air inlet pipe, an upper hot air pipe, a lower hot air pipe and an air knife, one end of the upper hot air pipe is communicated with the total air inlet pipe, the other end of the upper hot air pipe is communicated with an air inlet cavity arranged above the oven, one end of the lower hot air pipe is communicated with the total air inlet pipe, the other end of the lower hot air pipe is communicated with an air inlet cavity arranged below the oven, an air inlet end of the air knife is communicated with the air inlet cavity, and an air outlet end face of the air knife is arranged towards the oven cavity.
Further, the length of the upper hot air pipe is greater than that of the lower hot air pipe, and the air outlet end faces of the air knife arranged above the oven and the air knife arranged below the oven are oppositely arranged.
Further, the return air subassembly includes big return air inlet, little return air inlet, return air pipeline and exhaust pipe, and the one end and the return air cavity intercommunication of a plurality of big return air inlets, the other end pass the air inlet cavity and the oven cavity intercommunication of oven top, the one end and the oven cavity intercommunication of little return air inlet, the other end and the return air cavity intercommunication of return air pipeline, the one end and the return air cavity intercommunication of return air pipeline, the other end and the intercommunication of total air-supply line, the one end and the return air cavity intercommunication of exhaust pipe, the other end and external intercommunication.
Further, the plurality of air knives are arranged in parallel at intervals in sequence, one to a plurality of large air return openings are arranged between the adjacent air knives, and when the plurality of large air return openings are arranged between the adjacent air knives, the plurality of large air return openings are sequentially distributed along the extending direction of the air knives.
Further, a fresh air pipe for conveying fresh air into the return air pipeline is communicated with the return air pipeline, and the air quantity entering the return air pipeline through the fresh air pipe is equal to the air quantity exhausted through the exhaust pipe.
Further, a feed inlet and a discharge outlet are formed in the oven, and a winding core unreeled by the pole piece unreeling mechanism enters the oven cavity through the feed inlet and is wound by the pole piece winding mechanism after being transited by an oil roller in the oven cavity.
Further, an exhaust pipeline for exhausting is arranged at the position close to the feed inlet and the discharge outlet, one end of the exhaust pipeline is communicated with the oven cavity, and the other end of the exhaust pipeline is communicated with the return air cavity.
Further, a temperature sensor is arranged in the cavity of the oven, and a water powder detector is arranged at the discharge hole.
The battery pole piece baking hot air circulation device provided by the invention has the advantages that: according to the battery pole piece baking hot air circulation device provided by the structure, the whole roll of pole piece is unfolded for baking, the pole piece is heated very fast, moisture evaporates rapidly, and the time of the pole piece in the oven is greatly shortened. And the baking efficiency is improved. The control of the height of the hot air cavity connected with the plurality of air knives ensures that the wind speed of the hot air blown out by each air knife is consistent, and ensures the uniformity of wind speed and temperature; simultaneously, the sizes of the air inlets in the air return pipeline are controlled, so that the flow rates of different air inlets are kept consistent.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a cross-sectional view of FIG. 1;
FIG. 3 is a schematic view of a return air assembly;
FIG. 4 is a schematic diagram of the flow of supply and return air to the roasting heated air circulation;
FIG. 5 is a schematic diagram of the flow of supply and return air in the oven cavity;
the device comprises a 1-oven, a 2-air inlet assembly, a 3-air return assembly, a 4-air return cavity, a 5-air inlet cavity, an 11-feed inlet, a 12-discharge outlet, a 13-exhaust pipeline, a 14-oil roller, a 15-passing roller, a 21-total air inlet pipe, a 22-upper hot air pipe, a 23-lower hot air pipe, a 24-air knife, a 31-large air return port, a 32-small air return port, a 33-air return pipeline, a 34-exhaust pipe, a 35-fresh air pipe and a 36-guide plate.
Detailed Description
In the following detailed description of the present invention, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The invention may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit or scope of the invention, which is therefore not limited to the specific embodiments disclosed below.
As shown in fig. 1 to 5, the battery pole piece baking hot air circulation device provided by the invention comprises an oven 1, an air inlet assembly 2, an air return assembly 3, an air return cavity 4 and an air inlet cavity 5 communicated with the air inlet assembly 2, wherein one end of the air return assembly 3 is communicated with the air return cavity 4, the other end of the air return assembly is communicated with the oven 1, the two air inlet cavities 5 are respectively arranged on two opposite sides of the oven 1 and are communicated with the oven 1, one air inlet cavity 5 is arranged in the air return cavity 4, and the air return cavity 4 is communicated with the oven 1.
The return air subassembly 3 is connected with air inlet subassembly 1 for the part return air is used as the air inlet, has not only reduced the baking cost but also has improved baking efficiency, and wherein, two air inlet cavity 5 are along the air inlet flow direction, and the space of air inlet cavity 5 is by big to little setting, and return air cavity 4 is along the air return flow direction, and the space of return air cavity 4 is by big to little setting, through the control to the height of air inlet cavity 5 that a plurality of air knives are connected, guarantees that the hot-blast wind speed that each air knife blown out is unanimous. And simultaneously, the sizes of the air openings in the return air cavity 4 are controlled, so that the flow rates of different air openings are kept consistent. On the other hand, under the condition of controlling the cost, the temperature of hot air entering the oven is adjusted by utilizing an air duct structure; therefore, the system has a simple structure, and guarantees on the temperature uniformity and the air speed uniformity of the oven main body are realized with lower cost through the design of the pipeline size and the structure.
In this embodiment, the air intake assembly 2 includes a main air intake pipe 21, an upper hot air pipe 22, a lower hot air pipe 23 and an air knife 24, one end of the upper hot air pipe 22 is communicated with the main air intake pipe 21, the other end is communicated with an air intake cavity 5 arranged above the oven 1, one end of the lower hot air pipe 23 is communicated with the main air intake pipe 21, the other end is communicated with the air intake cavity 5 arranged below the oven 1, the air intake end of the air knife 24 is communicated with the air intake cavity 5, and the air outlet end of the air knife 24 is arranged towards the oven 1.
The upper hot air pipe 22 and the lower hot air pipe 23 are connected with the total air inlet pipe 21 through the guide plate 36, so that the air entering through the total air inlet pipe 21 is divided into two paths through the guide plate 36, one path enters the upper hot air pipe 22, the other path enters the lower hot air pipe 23, the length of the upper hot air pipe 22 is set to be larger than that of the lower hot air pipe 23, and the reason for the length difference is that: because the air return assembly 3 is arranged on the top surface of the oven body, and the hot air flows upwards, when the temperature of hot air blown by the air knives 24 positioned at the upper part and the lower part of the oven 1 is consistent, the accumulated temperature of the upper part of the interior of the oven 1 is higher than that of the lower part of the interior of the oven 1, so that the temperature difference of the cavity of the oven 1 can be counteracted by the fact that the temperature of hot air blown by the lower air knives positioned at the lower part of the oven 1 is higher than that of the air knives positioned at the upper part of the oven 1. Therefore, the upper hot air pipe 22 is set longer, more heat is dissipated in the process, so that the lower air knife at the lower part of the oven 1 has higher hot air temperature than the air knife at the upper part of the oven 1 under the condition of one hot air source, and finally, the temperature uniformity in the cavity of the oven 1 is improved.
For the air knives 24, the air knives 24 are respectively arranged along the pole piece conveying direction, each air knife 24 is vertically arranged on the upper part or the lower part of the oven along the pole piece conveying direction, and the air outlet end faces of the air knives 24 arranged above the oven 1 and the air knives 24 arranged below the oven are oppositely arranged so as to uniformly bake the pole pieces in the oven 1.
In this embodiment, the air return assembly 3 includes a large air return opening 31, a small air return opening 32, an air return pipeline 33 and an exhaust pipe 34, one end of the large air return openings 31 is communicated with the air return cavity 4, the other end passes through the air inlet cavity 5 above the oven 1 and is communicated with the oven 1, the small air return openings 32 are distributed in the area which does not pass through the upper air return cavity 5 along the conveying direction of the pole piece, one end of the small air return openings 32 is communicated with the oven 1, the other end is communicated with the air return cavity 4, one end of the air return pipeline 33 is communicated with the air return cavity 4, the other end is communicated with the total air inlet pipe 21, one end of the exhaust pipe 34 is communicated with the air return cavity 4, and the other end is communicated with the outside.
The plurality of air knives 24 are sequentially arranged in parallel at intervals, one to a plurality of large air return openings 31 are arranged between the adjacent air knives 24, and when the plurality of large air return openings 31 are arranged between the adjacent air knives 24, the plurality of large air return openings 31 are sequentially arranged along the extending direction of the air knives 24. In addition, a fresh air pipe 35 for conveying fresh air into the return air pipe 33 is communicated with the return air pipe 33, and the air quantity entering the return air pipe 33 through the fresh air pipe 35 is equal to the air quantity discharged through the exhaust pipe 34.
The feeding hole 11 and the discharging hole 12 are formed in the oven 1, and a winding core unreeled by the pole piece unreeling mechanism enters the cavity of the oven 1 through the feeding hole 11 and is wound through the pole piece winding mechanism after being transited through the oil roller 14 in the cavity of the oven 1. The oil roller 14 and the passing roller 5 are arranged in the oven body 15 according to the baking requirement, the pole piece can enter the oven 1 cavity from the feed inlet 11, the belt is penetrated between the passing roller 5 and the oil roller 14 according to the design position, and finally the pole piece is discharged from the oven 1 cavity from the discharge outlet 12.
An air draft pipeline 13 for air draft is arranged at the position close to the feed inlet 11 and the discharge outlet 12, one end of the air draft pipeline 13 is communicated with the cavity of the oven 1, and the other end is communicated with the return air cavity 4. The air suction pipeline 13 pumps air close to the feed inlet 11 and the discharge outlet 12 into the return air cavity 11, so that micro negative pressure is formed in the areas of the feed inlet 11 and the discharge outlet 12, and the heat of the cavity of the oven 1 is prevented from leaking to the outside. The air suction duct 13 is narrower at the air suction opening near the end of the return duct 33 than at the end far from the return duct 33, and similarly, the large return air opening 31 is increased in size proportionally along the direction near the end of the return duct 33 and toward the end far from the return duct 33.
The air inlet cavity 5 on the upper part of the oven 1 is arranged in the space formed by the air return cavity 4 and the oven body 1, and the heights of the air inlet cavity 5 on the upper part of the oven 1 and the air inlet cavity 5 on the lower part of the oven 1 are gradually reduced along with the direction away from the total air inlet pipe 21. The height design is related to the length of the cavity and the design air quantity, and the height design is adjusted according to the requirement. If the cavity height far from the total air inlet pipe 21 is too high, the smaller the air speed of the air knife 24 at the position far from the total air inlet pipe 21 is, the larger the air speed difference between the air knife 24 at the position close to the total air inlet pipe 21 is; if the height near the total air inlet duct 21 is too short, the greater the wind speed of the air knife 24 near the position of the total air inlet duct 21, the greater the difference between the wind speed of the air knife 24 and the wind speed of the air knife 24 far from the position of the total air inlet duct 21. This is because in the air intake chamber 5, when hot air is blown into the air intake chamber, kinetic energy is gradually dissipated in the process of reaching the innermost part of the air intake chamber. In order to prevent the wind speed of the air knife 24 far away from the total air inlet pipe 21 from being reduced due to the reduction of the kinetic energy, the air speed blown into the cavity of the oven 1 is kept uniform by controlling the volume of the air inlet cavity 5 at different positions.
The same applies to the return air cavity 4, if the size of the return air inlet (the return air inlet includes the large return air inlet 31 and the small return air inlet 32) far away from the return air pipeline 33 is too small, the smaller the flow of the return air inlet is, the larger the difference between the flow of the return air inlet and the air flow near the position of the return air inlet 33 is. Therefore, by adjusting the size of the air return opening, the air quantity discharged from the position far away from the air return pipeline 33 is kept consistent with the air quantity discharged from the position close to the air return pipeline 33, so that the flow quantity of each air return opening of the cavity of the oven 1 is kept uniform.
The specific implementation flow is as follows: the main air inlet pipe 21 is connected with a heater and a fan, the exhaust pipe 34 and the return air pipeline 33 are connected with the fan and the heat exchanger, part of air is discharged to the outside of the workshop through the exhaust pipe 34, meanwhile, the fresh air pipe 35 inputs fresh air which is consistent with or slightly less than the discharged air volume, heat exchange is carried out between the fresh air and the discharged air through the heat exchanger, then the fresh air is introduced into the return air pipeline 33, and after passing through the heater, the fresh air is introduced into the main air inlet pipe 21 again to form circulation. The operating personnel sets for wind temperature and flow through the control panel of pole piece dehumidification toasting equipment, opens the back air supply, goes on simultaneously with the return air to guarantee that oven 1 inside total amount of wind is unchangeable to utilize the air extraction pipeline 13 of feed inlet 11 and discharge gate 12, guarantee that oven 1 inside heat does not influence the interior temperature control of workshop. In the structure of the air inlet assembly 2, the air speed of the hot air blown out by each air knife 24 is consistent through controlling the height of the air inlet cavity 5. The air port size in the air return pipeline 33 is controlled, so that the flow rates of different air ports are kept consistent, and meanwhile, the air duct structure is utilized to adjust the temperature of hot air entering the oven 1, so that the requirements of the oven 1 on the uniformity of air speed and temperature are met.
The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical scheme of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311262169.XA CN117073342A (en) | 2023-09-27 | 2023-09-27 | A hot air circulation device for baking battery pole pieces |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311262169.XA CN117073342A (en) | 2023-09-27 | 2023-09-27 | A hot air circulation device for baking battery pole pieces |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117073342A true CN117073342A (en) | 2023-11-17 |
Family
ID=88708207
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311262169.XA Pending CN117073342A (en) | 2023-09-27 | 2023-09-27 | A hot air circulation device for baking battery pole pieces |
Country Status (1)
| Country | Link |
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| CN (1) | CN117073342A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN120043325A (en) * | 2025-04-08 | 2025-05-27 | 深圳捷牛科技有限公司 | Baking chamber and baking device with same |
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| US20090321411A1 (en) * | 2006-09-19 | 2009-12-31 | Michael Koos | Baking oven |
| CN207317481U (en) * | 2017-09-29 | 2018-05-04 | 东莞市创明电池技术有限公司 | Baking oven and coating machine |
| CN210810615U (en) * | 2019-08-03 | 2020-06-23 | 广东智源机器人科技有限公司 | Baking oven circulating air duct mechanism and baking machine |
| CN113522692A (en) * | 2021-06-28 | 2021-10-22 | 合肥国轩高科动力能源有限公司 | A double-layer heating coating machine oven |
| CN114427779A (en) * | 2021-12-01 | 2022-05-03 | 昆山晟成光电科技有限公司 | Linear vacuum drying equipment |
| CN219572575U (en) * | 2023-02-13 | 2023-08-22 | 武汉鼎耐力纺织科技有限公司 | Automatic hot air circulation drying device for lining cloth drying |
-
2023
- 2023-09-27 CN CN202311262169.XA patent/CN117073342A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090321411A1 (en) * | 2006-09-19 | 2009-12-31 | Michael Koos | Baking oven |
| CN207317481U (en) * | 2017-09-29 | 2018-05-04 | 东莞市创明电池技术有限公司 | Baking oven and coating machine |
| CN210810615U (en) * | 2019-08-03 | 2020-06-23 | 广东智源机器人科技有限公司 | Baking oven circulating air duct mechanism and baking machine |
| CN113522692A (en) * | 2021-06-28 | 2021-10-22 | 合肥国轩高科动力能源有限公司 | A double-layer heating coating machine oven |
| CN114427779A (en) * | 2021-12-01 | 2022-05-03 | 昆山晟成光电科技有限公司 | Linear vacuum drying equipment |
| CN219572575U (en) * | 2023-02-13 | 2023-08-22 | 武汉鼎耐力纺织科技有限公司 | Automatic hot air circulation drying device for lining cloth drying |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN120043325A (en) * | 2025-04-08 | 2025-05-27 | 深圳捷牛科技有限公司 | Baking chamber and baking device with same |
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