A backflow exhaust air integrated air duct structure and a coating oven

Abstract

This application discloses an integrated reflux and exhaust duct structure and a coating oven. The duct structure includes a housing, an exhaust assembly, and an exhaust frame. A heating chamber is formed within the housing. The exhaust frame is mounted on the housing, with its first end connected to the exhaust assembly and its second end having multiple exhaust ports. The heating chamber has a reflux cavity communicating with it, where hot air is collected. Some of the exhaust ports communicate with the heating chamber, while the remaining exhaust ports communicate with the reflux cavity, allowing the exhaust assembly to discharge the hot air generated within the heating chamber. By setting up a reflux cavity to collect most of the hot air within the heating chamber and designing the second end of the exhaust frame with multiple exhaust ports, it not only collects most of the hot air through the reflux cavity but also collects the residual hot air within the heating chamber, effectively discharging the hot air from the heating chamber, preventing hot air accumulation, and ensuring consistent drying of the electrode surface.

Description

Technical Field

[0001] This application relates to the field of coating oven technology, and in particular to a duct structure integrating reflux and exhaust and a coating oven. Background Technology

[0002] The nozzles of coating ovens are used for continuous airflow, but in most related technologies, the exhaust design of ovens involves opening exhaust vents on the oven body and then using an exhaust assembly to draw in the exhaust air. As the coating width increases, the exhaust efficiency of existing exhaust designs is insufficient, and hot air still accumulates on both sides of the oven body, affecting the consistency of the drying effect on the electrode surface. Utility Model Content

[0003] This application proposes an integrated reflux and exhaust duct structure to effectively solve the technical problem of insufficient exhaust efficiency in related technologies, which affects the consistency of drying effect on the electrode surface.

[0004] This application also proposes a coating oven that includes the above-mentioned integrated duct structure for reflux and exhaust.

[0005] The first aspect of this application provides a duct structure integrating return and exhaust ventilation, including: a housing, an exhaust assembly, and an exhaust frame;

[0006] A heating air chamber is formed inside the box;

[0007] The exhaust frame is disposed on the housing, the first end of the exhaust frame is used to connect to the exhaust assembly, and the second end of the exhaust frame is provided with multiple exhaust ports;

[0008] The heating air chamber is provided with a return cavity that communicates with the heating air chamber. The return cavity is used for collecting hot air. Part of the exhaust port is connected to the heating air chamber, and the rest of the exhaust port is connected to the return cavity, so that the exhaust assembly can exhaust the hot air generated in the heating air chamber.

[0009] Furthermore, the heating air chamber is provided with a first air nozzle and an air inlet assembly. The first air nozzle includes an air inlet section and an air outlet section. The air inlet section is connected to the air inlet assembly, and the air outlet section is used to discharge air. The reflux chamber is located near the air outlet section to collect the hot air output from the air outlet section and applied to the electrode.

[0010] Furthermore, the heating air chamber is also provided with a second air nozzle, and the air intake assembly includes a first air intake hull and a second air intake hull;

[0011] The first input end of the first air intake hull and the second input end of the second air intake hull are respectively used for air intake;

[0012] The first air inlet of the first air nozzle is connected to the first air outlet of the first air inlet hull, and the second air inlet of the second air nozzle is connected to the second air outlet of the second air inlet hull.

[0013] The second nozzle is used for air outlet.

[0014] Furthermore, the housing is also provided with an air inlet chamber, which is connected to the heating air chamber. The air inlet chamber is provided with a circulation component, which is used to circulate air between the air inlet chamber and the heating air chamber.

[0015] Furthermore, a first port and a second port are provided between the air inlet chamber and the heating air chamber. The first port and the second port are spaced apart in the vertical direction, and the circulation component can draw hot air from the heating air chamber through the first port and / or the second port.

[0016] Furthermore, a third port and a fourth port for air intake are provided between the air intake chamber and the heating air chamber. The first input end of the first air intake hull is correspondingly provided with the third port, and the second input end of the second air intake hull is correspondingly provided with the fourth port.

[0017] Furthermore, the housing is also equipped with a heat exchanger and a filter, the circulation assembly, the heat exchanger and the filter are connected in sequence, and the air outlet of the filter is arranged facing the third port and the fourth port.

[0018] Furthermore, the exhaust frame has a third end that communicates with the first end, and the third end of the exhaust frame communicates with the air inlet chamber. The circulation component is also used to draw a portion of the hot air in the exhaust frame into the air inlet chamber and circulate it with the heating air chamber.

[0019] Furthermore, the duct structure also includes a control valve for controlling the circulation assembly and the exhaust assembly to make at least one of the circulation assembly or the exhaust assembly work;

[0020] And / or, the air inlet chamber is further provided with an air inlet and / or an air outlet.

[0021] As can be seen from the above technical solutions, the embodiments of this application have at least the following beneficial effects: by setting a reflux cavity to collect most of the hot air in the heating air chamber, and setting the second end of the exhaust frame to a structure with multiple exhaust ports, it can not only collect most of the hot air through the reflux cavity, but also collect the hot air remaining in the heating air chamber, thereby effectively discharging the hot air in the heating air chamber, avoiding the phenomenon of hot air accumulation, and ensuring the consistency of the drying effect on the electrode surface.

[0022] A second aspect of this application provides a coating oven, including: an integrated reflux and exhaust duct structure as described in the first aspect of this application.

[0023] It is easy to understand that the coating oven in the second aspect embodiment of this application has the same technical effect as the integrated air duct structure of the first aspect embodiment, and therefore will not be described again.

[0024] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 A schematic diagram of the air duct structure provided in one embodiment of this application along a first direction;

[0027] Figure 2 A schematic diagram of the air duct structure provided in one embodiment of this application, shown along the second direction;

[0028] Figure 3 An internal schematic diagram of a duct structure provided in one embodiment of this application, shown along a first direction;

[0029] Figure 4 An internal schematic diagram of a duct structure provided in one embodiment of this application, shown along a second direction;

[0030] Figure 5 A schematic diagram showing the housing along a first direction according to one embodiment of this application;

[0031] Figure 6 A schematic diagram showing the housing along a second direction according to one embodiment of this application;

[0032] Figure 7 A schematic diagram of a first air nozzle provided in one embodiment of this application;

[0033] The first direction can be understood as the direction facing forward at a certain angle, and the second direction can be understood as the direction facing the opposite back at a certain angle.

[0034] Figure label:

[0035] 100. Housing; 110. Heating air chamber; 111. First opening; 112. Second opening; 120. First air nozzle; 121. Air inlet; 122. Air outlet; 123. Return gap; 124. Return cavity; 130. Air inlet assembly; 131. First air inlet hull; 132. Second air inlet hull; 140. Second air nozzle; 150. Air inlet chamber; 151. Third opening; 152. Fourth opening; 160. Circulation assembly; 170. Air outlet; 180. Air inlet;

[0036] 200. Exhaust system;

[0037] 300. Exhaust frame; 301. First end; 302. Second end; 303. Third end; 310. Exhaust vent;

[0038] 400. Heat exchanger;

[0039] 500, Filter. Detailed Implementation

[0040] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0041] See Figures 1 to 7 As shown, an embodiment of the first aspect of this application discloses an integrated air duct structure for recirculation and exhaust, including a housing 100, an exhaust assembly 200, and an exhaust frame 300.

[0042] A heating air chamber 110 is formed inside the housing 100; an exhaust frame 300 is disposed on the housing 100, the first end 301 of the exhaust frame 300 is used to connect with the exhaust assembly 200, and the second end 302 of the exhaust frame 300 is provided with multiple exhaust ports 310; a return cavity 124 communicating with the heating air chamber 110 is provided inside the heating air chamber 110, the return cavity 124 is used for hot air collection, some of the exhaust ports 310 are connected to the heating air chamber 110, and the remaining exhaust ports 310 are connected to the return cavity 124, so that the exhaust assembly 200 can exhaust the hot air generated in the heating air chamber 110.

[0043] In the embodiments of this application, a reflux chamber 124 is set to collect most of the hot air in the heating air chamber 110, and the second end 302 of the exhaust frame 300 is set to have a structure with multiple exhaust ports 310. This allows it to collect not only most of the hot air through the reflux chamber 124, but also the remaining hot air in the heating air chamber 110. This effectively discharges the hot air in the heating air chamber 110, avoids the accumulation of hot air, and ensures the consistency of the drying effect on the electrode surface.

[0044] Understandably, in some embodiments, the reflux chamber 124 is connected to the heating air chamber 110 and is used to collect the hot air from the heating air chamber 110, preventing the accumulation of hot air in the heating air chamber 110. After collection, the hot air is drawn out and discharged by the exhaust assembly 200, preventing the accumulation of hot air in the housing 100. Furthermore, the second end 302 of the exhaust frame 300 is provided with multiple exhaust ports 310, so that the layout of the exhaust ports 310 is specifically designed according to the specific layout and structure of the heating air chamber 110 and the reflux chamber 124, thereby improving the hot air discharge efficiency by simultaneously drawing out hot air through each exhaust port 310.

[0045] For example, considering that the return cavity 124 is used to collect most of the hot air, an exhaust port 310 is provided to connect with the return cavity 124 so that most of the hot air is collected and discharged from the return cavity 124, and the remaining exhaust ports 310 are spaced out in the heating air chamber 110 so as to cover and fully discharge the hot air remaining in the heating air chamber 110.

[0046] The following will combine Figures 1 to 7 The integrated return and exhaust duct structure disclosed in the embodiments of this application will be explained and described in detail.

[0047] In some embodiments of this application, reference is made to Figure 7 The heating air chamber 110 is provided with a first air nozzle 120 and an air inlet assembly 130. The first air nozzle 120 includes an air inlet section 121 and an air outlet section 122. The air inlet section 121 is connected to the air inlet assembly 130, and the air outlet section 122 is used to discharge air. The return cavity 124 is disposed near the air outlet section 122 to collect the hot air output from the air outlet section 122 and acting on the electrode.

[0048] It should be understood that, in order to achieve higher efficiency in collecting hot air from the heating air chamber 110, the design of the structural components forming the return cavity 124 is crucial to realizing the above functions. In this regard, in some embodiments of this application, reference is made to... Figure 7The heating air chamber 110 is provided with a first air nozzle 120 and an air inlet assembly 130. The first air nozzle 120 includes an air inlet section 121, an air outlet section 122 and a return gap section 123. The air inlet section 121 is connected to the air inlet assembly 130. The air outlet section 122 is used to discharge air. The return gap section 123 is disposed on the air outlet section 122. The return gap section 123 is connected to the return cavity 124 and is used to guide the hot air in the heating air chamber 110 to the return cavity 124.

[0049] Understandably, the first air nozzle 120 is used to dry the electrode sheet in the heating air chamber 110, thereby meeting the usage requirements of the coating oven. The first air nozzle 120 includes an air inlet 121 for receiving hot air supplied by the air inlet assembly 130 and an air outlet 122 for outputting hot air. Based on this, the hot air is guided by the return gap 123 as a channel to reach the return chamber 124. Subsequently, the hot air in the return chamber 124 can be discharged in time by the exhaust assembly 200 and the exhaust frame 300, thereby improving the efficiency of hot air discharge.

[0050] In some embodiments, the air inlet 121 may be provided with structural components for providing air intake quality and / or efficiency, such as flow guides, flow converging components, etc. Similarly, the air outlet 122 may be provided with structural components for providing air outlet quality and / or efficiency, such as air distribution components, filters, etc.

[0051] In some embodiments, the reflux cavity 124 is part of the structure of the first air nozzle 120. That is, the reflux cavity 124, the air inlet 121, the air outlet 122 and the reflux gap 123 are connected and installed to form an integral whole, or the reflux cavity 124, the air inlet 121, the air outlet 122 and the reflux gap 123 are obtained by manufacturing the first air nozzle 120 as an integral unit, thereby ensuring the integrity of the hot air discharge.

[0052] In some embodiments, for example, the return chambers 124 are respectively disposed on both sides of the outlet 122 in the width direction and have air ducts extending along the length direction of the outlet 122. The return gap 123 is disposed between the return chamber 124 and the outlet 122. One end of the return gap 123 faces the same direction as the outlet 122, and the other end is connected to the bottom of the return chamber 124. It can be understood that the fact that one end of the return gap 123 faces the same direction as the outlet 122 allows the return gap 123 to collect the residual hot air after acting on the electrode in a timely and efficient manner, and guide it to the return chamber 124 for collection and treatment. Through the targeted structural design of the return chamber 124, an installation foundation is provided for the connection of the exhaust port 310 of the subsequent exhaust frame 300, and the efficiency of hot air discharge is ensured.

[0053] In some embodiments of this application, reference is made to Figure 3 and Figure 4The heating air chamber 110 is also provided with a second air nozzle 140. The air intake assembly 130 includes a first air intake hull 131 and a second air intake hull 132. The first input end of the first air intake hull 131 and the second input end of the second air intake hull 132 are respectively used for air intake. The first air intake end of the first air nozzle 120 is connected to the first air outlet end of the first air intake hull 131, and the second air intake end of the second air nozzle 140 is connected to the second air outlet end of the second air intake hull 132. The second air nozzle 140 is used for air outlet.

[0054] It is understandable that by separately setting the first air nozzle 120 and the second air nozzle 140 for drying the electrode sheets, the drying quality is improved. Furthermore, the second air nozzle 140 may or may not have a corresponding recirculation structure similar to that of the first air nozzle 120, thus meeting the usage requirements of different scenarios. Moreover, based on the different operating conditions of the first air nozzle 120 and the second air nozzle 140, hot air is supplied through the first air inlet hull 131 and the second air inlet hull 132 respectively, thereby ensuring the drying quality.

[0055] In some embodiments, there are multiple first air nozzles 120 and second air nozzles 140, with hot air supplied to the multiple first air nozzles 120 by the first air intake hull 131 and hot air supplied to the multiple second air nozzles 140 by the second air intake hull 132.

[0056] In some embodiments of this application, reference is made to Figure 4 , Figure 5 and Figure 6 The housing 100 also includes an air inlet chamber 150, which is connected to the heating air chamber 110. A circulation assembly 160 is installed within the air inlet chamber 150 to circulate air between the air inlet chamber 150 and the heating air chamber 110. It is understood that by configuring the air inlet chamber 150 and the circulation assembly 160, this air duct structure can achieve continuous hot air output and ensure drying efficiency.

[0057] In some embodiments, a partition is provided inside the housing 100 to divide the space inside the housing 100 into an air inlet chamber 150 and a heating air chamber 110. The first port 111, the second port 112, the third port 151, and the fourth port 152 mentioned in subsequent embodiments can be provided on this partition so that the air inlet chamber 150 and the heating air chamber 110 are connected through the first port 111 and the second port 112 for air outlet, and through the third port 151 and the fourth port 152 for air inlet, thereby realizing air circulation.

[0058] In some embodiments, reference is made to Figure 5A first port 111 and a second port 112 are provided between the air inlet chamber 150 and the heating air chamber 110. The first port 111 and the second port 112 are spaced apart in the vertical direction. The circulation component 160 can draw hot air from the heating air chamber 110 through the first port 111 and / or the second port 112. It can be understood that the hot air in the heating air chamber 110 can also flow into the circulation component 160 through the first port 111 and the second port 112. That is, conventional hot air flows into the circulation component 160 through the first port 111, and the hot air sinking to the bottom is drawn into the circulation component 160 through the second port 112 through the gap below.

[0059] In some embodiments, reference is made to Figure 6 A third port 151 and a fourth port 152 for air intake are provided between the air intake chamber 150 and the heating air chamber 110. The first input end of the first air intake hull 131 is correspondingly provided with the third port 151, and the second input end of the second air intake hull 132 is correspondingly provided with the fourth port 152. It can be understood that due to the setting of the first air nozzle 120 and the second air nozzle 140, the first air intake hull 131 and the second air intake hull 132 are correspondingly provided. Based on this, by setting the third port 151 and the fourth port 152 for air intake to correspond with them, the usage requirements of the first air nozzle 120 and the second air nozzle 140 are met.

[0060] In some embodiments, reference is made to Figure 4 The chamber 100 is also equipped with a heat exchanger 400 and a filter 500. The circulation assembly 160, heat exchanger 400, and filter 500 are connected in sequence. The air outlet of filter 500 is set towards the third port 151 and the fourth port 152. It can be understood that configuring filter 500 and heat exchanger 400 can meet the usage requirements of electrode drying in coating oven, ensure that the supplied hot air for drying has a good drying effect, and ensure the drying quality of electrode surface.

[0061] In some embodiments of this application, reference is made to Figures 1 to 4 The exhaust frame 300 has a third end 303 that is connected to the first end 301. The third end 303 of the exhaust frame 300 is connected to the air inlet chamber 150. The circulation component 160 is also used to draw part of the hot air in the exhaust frame 300 into the air inlet chamber 150 and circulate it with the heating air chamber 110. By drawing part of the hot air in the exhaust frame 300 into the air inlet chamber 150 for recycling through the circulation component 160, the energy utilization rate is improved.

[0062] Understandably, the circulation component 160 and the exhaust component 200 work together to extract hot air from multiple exhaust vents 310, and combined with the duct design, this greatly improves exhaust efficiency.

[0063] In some embodiments of this application, the duct structure further includes a control valve for controlling the circulation component 160 and the exhaust component 200 to make at least one of the circulation component 160 or the exhaust component 200 work; it is understood that the circulation component 160 and the exhaust component 200 are both controlled by the control valve and can be used simultaneously or selectively to effectively exhaust hot air and meet the needs of different working conditions.

[0064] In some embodiments, the circulation component 160 is a circulation fan, and the exhaust component 200 is an exhaust fan.

[0065] In some embodiments of this application, reference is made to Figure 2 The air inlet chamber 150 is also provided with an air inlet 180 and / or an air outlet 170. It can be understood that the air inlet 180 is used to supply air, which is then obtained by the circulation component 160 to achieve air circulation within the chamber 100, and the air outlet 170 is used to cooperate with the exhaust component 200 and the exhaust frame 300 to achieve natural exhaust. The three exhaust designs are designed to match the high and wide width coating drying requirements.

[0066] The integrated return and exhaust duct structure of this application is described in detail below with a specific embodiment. It should be noted that the following embodiment is merely an exemplary description and should not be construed as limiting the embodiments of this application.

[0067] See Figures 1 to 7 As shown, the integrated reflux and exhaust duct structure of this embodiment includes a housing 100 and an exhaust frame 300. A heating air chamber 110 is formed inside the housing 100. The exhaust frame 300 is disposed on the housing 100, and one end of the exhaust frame 300 is provided with multiple exhaust ports 310 communicating with the heating air chamber 110. The other end of the exhaust frame 300 is used to communicate with the exhaust assembly 200. By providing multiple exhaust ports 310 on the exhaust frame 300, with one exhaust port 310 facing the reflux cavity 124 in the heating air chamber 110, most of the hot air is collected and discharged by the reflux cavity 124. The remaining hot air in the heating air chamber 110 is covered by the remaining exhaust ports 310. This can effectively discharge the hot air in the heating air chamber 110 after contact with the electrode, avoid the phenomenon of hot air accumulation in the housing 100, and thus ensure the consistency of the drying effect on the electrode surface.

[0068] Furthermore, the housing 100 also includes an air inlet chamber 150, with the other end of the exhaust frame 300 connected to the air inlet chamber 150. A circulating fan is installed within the air inlet chamber 150, drawing some of the hot air from the exhaust frame 300 into the air inlet chamber 150 for recycling. A first opening 111 and a second opening 112 are located at the gap between the air inlet chamber 150 and the heating air chamber 110. Hot air from the heating air chamber 110 can also flow into the circulating fan through the first opening 111 and the second opening 112; that is, hot air sinking to the bottom from the lower gap can also flow into the circulating fan through the second opening 112. An exhaust port 310 is located on the side of the air inlet chamber 150 adjacent to the exhaust frame 300, allowing for natural ventilation. This three-exhaust design is designed to meet the requirements of high-width coating drying.

[0069] In addition, the housing 100 also includes a heat exchanger 400 and a filter 500. The circulating fan, heat exchanger 400, and filter 500 are connected in sequence. The air outlet of the filter 500 faces the air inlet of the air inlet assembly 130. That is, a third port 151 and a fourth port 152 are provided at the connection between the air inlet chamber 150 and the heating air chamber 110 for air intake. The exhaust assembly 200 is an exhaust fan. By splitting the air duct into two sides at the other end of the exhaust frame 300, one side flows to the circulating fan, and the other side directly exhausts air. This can effectively adapt to the needs of high-width coating. Moreover, the two fans work together to extract hot air from multiple exhaust ports 310. Combined with the air duct design, the exhaust efficiency can be greatly improved. Both the circulating fan and the exhaust fan are controlled by control valves and can be used simultaneously or selectively.

[0070] It should be noted that the heating air chamber 110 is equipped with a first air nozzle 120, a first air inlet hull 131, a second air inlet hull 132, and a return air frame. The air inlet end of the first air inlet hull 131 and the air inlet end of the second air inlet hull 132 are respectively provided with a third port 151 and a fourth port 152. The air inlet end of the first air nozzle 120 is connected to the air outlet end of the first hull. The return air frame 300 is provided on the first air inlet hull 131 and is connected to the return cavity 124 of the first air nozzle 120. The air inlet end of the second air nozzle 140 is connected to the air outlet end of the second hull. The second air nozzle 140 does not have a return structure design and only has an air outlet function. The structure of the first air nozzle 120 includes a return gap and a return cavity 124. The hot air that returns is collected through the return gap and then flows back to the return air frame through the pipe from the return cavity 124. The air inlet of the first air nozzle 120 is provided with an air distribution mesh plate and an air outlet mesh plate.

[0071] The second aspect of this application discloses a coating oven, including: the integrated reflux and exhaust duct structure of the first aspect of this application.

[0072] It is easy to understand that the coating oven in the second aspect embodiment of this application has the same technical effect as the integrated air duct structure of the first aspect embodiment, and therefore will not be described again.

[0073] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., 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 application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0074] 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. In the description of this application, unless otherwise stated, "multiple" means two or more. It should be noted that the term "and / or" used herein is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone. Similarly, at least one of A or B can also represent: A alone, A and B simultaneously, or B alone.

[0075] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0076] In the foregoing description of this specification, references to terms such as "one embodiment," "another embodiment," or "some embodiments" indicate that a specific feature, structure, material, or characteristic described in connection with an embodiment or example is included in at least one embodiment or example of this application. In the description of this specification, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

Claims

1. A duct structure integrating return and exhaust ventilation, characterized in that, include: The enclosure (100), the exhaust assembly (200), and the exhaust frame (300); A heating air chamber (110) is formed inside the housing (100); The exhaust frame (300) is disposed on the housing (100), the first end (301) of the exhaust frame (300) is used to connect to the exhaust assembly (200), and the second end (302) of the exhaust frame (300) is provided with a plurality of exhaust ports (310). The heating air chamber (110) is provided with a return cavity (124) communicating with the heating air chamber (110). The return cavity (124) is used for hot air collection. Part of the exhaust port (310) is connected to the heating air chamber (110), and the rest of the exhaust port (310) is connected to the return cavity (124), so that the exhaust assembly (200) can exhaust the hot air generated in the heating air chamber (110).

2. The integrated return and exhaust duct structure according to claim 1, characterized in that: The heating air chamber (110) is provided with a first air nozzle (120) and an air inlet assembly (130). The first air nozzle (120) includes an air inlet (121) and an air outlet (122). The air inlet (121) is connected to the air inlet assembly (130). The air outlet (122) is used to discharge air. The return cavity (124) is located close to the air outlet (122) to collect the hot air output by the air outlet (122) and applied to the electrode.

3. The integrated return and exhaust duct structure according to claim 2, characterized in that: The heating air chamber (110) is also provided with a second air nozzle (140), and the air intake assembly (130) includes a first air intake hull (131) and a second air intake hull (132). The first input end of the first air intake hull (131) and the second input end of the second air intake hull (132) are used for air intake, respectively; The first air inlet of the first air nozzle (120) is connected to the first air outlet of the first air inlet hull (131), and the second air inlet of the second air nozzle (140) is connected to the second air outlet of the second air inlet hull (132). The second air nozzle (140) is used for air outlet.

4. The integrated return and exhaust duct structure according to claim 3, characterized in that: The housing (100) is also provided with an air inlet chamber (150), which is connected to the heating air chamber (110). The air inlet chamber (150) is provided with a circulation component (160), which is used to circulate air between the air inlet chamber (150) and the heating air chamber (110).

5. The integrated return and exhaust duct structure according to claim 4, characterized in that: A first port (111) and a second port (112) are provided between the air inlet chamber (150) and the heating air chamber (110). The first port (111) and the second port (112) are spaced apart in the vertical direction. The circulation component (160) can draw hot air from the heating air chamber (110) through the first port (111) and / or the second port (112).

6. The integrated return and exhaust duct structure according to claim 4, characterized in that: A third port (151) and a fourth port (152) for air intake are provided between the air intake chamber (150) and the heating air chamber (110). The first input end of the first air intake hull (131) is correspondingly provided with the third port (151), and the second input end of the second air intake hull (132) is correspondingly provided with the fourth port (152).

7. The integrated return and exhaust duct structure according to claim 6, characterized in that: The housing (100) is also provided with a heat exchanger (400) and a filter (500). The circulation component (160), the heat exchanger (400) and the filter (500) are connected in sequence. The air outlet of the filter (500) is set towards the third port (151) and the fourth port (152).

8. The integrated return and exhaust duct structure according to claim 4, characterized in that: The exhaust frame (300) has a third end (303) that communicates with the first end (301). The third end (303) of the exhaust frame (300) communicates with the air inlet chamber (150). The circulation component (160) is also used to draw part of the hot air in the exhaust frame (300) into the air inlet chamber (150) and circulate it with the heating air chamber (110).

9. The integrated return and exhaust duct structure according to claim 4, characterized in that: The duct structure also includes a control valve for controlling the circulation assembly (160) and the exhaust assembly (200) to make at least one of the circulation assembly (160) or the exhaust assembly (200) work; And / or, the air inlet chamber (150) is also provided with an air inlet (180) and / or an air outlet (170).

10. A coating oven, characterized in that, include: The integrated return and exhaust duct structure as described in any one of claims 1 to 9.

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