Oil dripping prevention structure of air exhaust duct and baking device

Abstract

The utility model discloses a kind of oil drip-proof structure of exhaust duct and baking device, it is related to circuit board production technical field, wherein the oil drip-proof structure of exhaust duct includes sealing box, oil collecting box and sealing structure, the upper end of sealing box is equipped with the air outlet suitable for being connected with exhaust duct, the circumferential side of sealing box is horizontally equipped with the air inlet suitable for being connected with air outlet, the opening direction of air outlet and the opening direction of air inlet are angle setting, oil collecting box is detachably arranged at the lower end of sealing box, the inside of sealing box and oil collecting box forms a cavity, air outlet and air inlet are communicated with cavity respectively, sealing structure is arranged at the connecting place of sealing box and oil collecting box.The oil drip-proof structure of exhaust duct and baking device can collect ink after vaporization and recondensation, prevent the product quality anomaly and fire caused by condensed ink backflow to baking equipment.

Description

Technical Field

[0001] This utility model relates to the field of circuit board manufacturing technology, and in particular to an oil-drip prevention structure for exhaust ducts and a baking device. Background Technology

[0002] In the production process of printed circuit boards, high-temperature baking is one of the important steps to eliminate internal stress and improve the soldering effect.

[0003] Currently, during the circuit board baking process, the high-temperature baking operation causes the ink on the circuit board to vaporize and be discharged through the exhaust duct. The exhaust duct connects directly from the equipment's exhaust port to the main exhaust duct. This ink vapor condenses back into liquid within the duct and, under gravity, accumulates along the duct wall and flows back into the baking equipment. If the backflowing liquid ink drips onto the circuit board, it will cause product quality defects; if it drips onto the heating element of the baking equipment, it may ignite the baking equipment and cause a fire. Furthermore, the existing baking equipment's exhaust port and exhaust duct connection points are not easily disassembled, making it difficult to disassemble, clean, and maintain the duct, significantly increasing the difficulty of maintenance. Utility Model Content

[0004] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes an oil-drip-proof structure for a ventilation duct, which can collect the vaporized and re-condensed ink, preventing the condensed ink from flowing back into the baking equipment.

[0005] This utility model also proposes a baking device with the above-mentioned anti-dripping oil structure for the exhaust pipe.

[0006] According to a first aspect embodiment of the present invention, the anti-drip oil structure for the exhaust duct includes:

[0007] A sealed box, wherein the upper end of the sealed box is provided with an air outlet suitable for connection to an exhaust duct, and the periphery of the sealed box is provided with an air inlet suitable for connection to an exhaust vent. The opening direction of the air outlet is set at an angle to the opening direction of the air inlet.

[0008] An oil collection box is detachably disposed at the lower end of the sealing box. The interior of the sealing box and the oil collection box form a cavity. The air outlet and the air inlet are respectively connected to the cavity.

[0009] A sealing structure is provided at the connection between the sealing box and the oil collection box.

[0010] According to some embodiments of this utility model, it also includes an oil baffle plate, which is obliquely disposed in the cavity. The upper end of the oil baffle plate is connected to the upper end of the sealing box and close to the air inlet, and the lower end of the oil baffle plate is connected to the lower end of the oil collection box and away from the air inlet. The length of the oil baffle plate in the left-right direction is less than the length of the cavity in the left-right direction.

[0011] According to some embodiments of the present invention, the oil baffle plate has a through groove.

[0012] According to some embodiments of this utility model, the cross-sectional area of ​​the air outlet is smaller than the area of ​​the upper surface of the sealing box.

[0013] According to some embodiments of the present invention, an installation part is provided on the outer side of the oil collection box, and the installation part has an installation hole.

[0014] According to some embodiments of this utility model, a snap-fit ​​component is also included, and the sealing box and the oil collection box are connected by the snap-fit ​​component.

[0015] According to some embodiments of this utility model, the sealing structure is a high-temperature sealing strip, one end of which is connected to the bottom surface of the sealing box, and the other end of which is connected to the top surface of the oil collection box. The fastener is in contact with the high-temperature sealing strip.

[0016] According to some embodiments of the present invention, the opening direction of the air outlet is at a 90-degree angle to the opening direction of the air inlet.

[0017] According to some embodiments of this utility model, the oil collection box is die-cast from a single sheet of galvanized iron.

[0018] The baking apparatus according to a second aspect of the present invention includes an oil-drip prevention structure for the exhaust duct according to the first aspect of the present invention. The oil-drip prevention structure for the exhaust duct is installed on the surface of the baking oven. The air inlet is connected to the exhaust outlet of the baking oven, and the air outlet is connected to the exhaust duct.

[0019] The oil-drip prevention structure for exhaust ducts and the baking device of this utility model embodiment have at least the following beneficial effects: Through the combined design of a sealing box and an oil collection box, a highly efficient processing chamber integrating condensation, collection, and discharge is constructed. The chamber receives gas through an air inlet horizontally positioned around the sealing box and exhausts gas through an air outlet angled to the air inlet at the top of the sealing box. High-temperature ink-laden vapor can rapidly condense and liquefy within the chamber and be collected in the lower oil collection box, preventing liquid ink from flowing back and dripping onto the circuit board, thus avoiding product quality abnormalities and potential fire hazards from dripping onto the heating element. This significantly improves production safety and product yield. Simultaneously, the product, through the design of the box, detachable structure, and sealing ring, ensures a tight connection between the oil collection box and the upper sealing box. For cleaning and maintenance, the detachable structure allows for easy removal of the oil collection box to remove oil stains and fibrous material inside, making maintenance convenient.

[0020] Additional aspects and advantages of this invention 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 the invention. Attached Figure Description

[0021] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0022] Figure 1 This is a schematic diagram of the assembly structure of an oil-drip prevention structure for an exhaust duct according to an embodiment of the present utility model;

[0023] Figure 2 yes Figure 1 Sectional view at point AA;

[0024] Figure 3 for Figure 1 One of the schematic diagrams of a hidden sealing box for an oil-drip prevention structure of an exhaust duct is shown;

[0025] Figure 4 for Figure 1 The second schematic diagram shows a hidden sealing box of an oil-drip prevention structure for an exhaust duct.

[0026] Figure label:

[0027] Sealed box 100, air outlet 110, air inlet 120.

[0028] Oil collection box 200, mounting part 210, mounting hole 211

[0029] Cavity 300

[0030] Sealing structure 400

[0031] Oil baffle 500, through groove 510,

[0032] Fastener 600. Detailed Implementation

[0033] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0034] In the description of this utility model, it should be understood that the terms "upper", "lower", "vertical", "horizontal", "bottom", "inner", 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 utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0035] In the description of this utility model, unless otherwise explicitly defined, the terms "setting", "connecting", "installing", "connecting", etc. should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in combination with the specific content of the technical solution.

[0036] The following is as follows Figures 1 to 4 This invention describes an oil-drip-proof structure for an exhaust duct according to an embodiment of the present invention.

[0037] like Figure 1 and Figure 2 As shown, an oil-drip prevention structure for an exhaust duct according to an embodiment of the present invention includes a sealing box 100, an oil collection box 200, and a sealing structure 400. The upper end of the sealing box 100 is provided with an air outlet 110 suitable for connection with an exhaust duct (not shown in the figure), and the periphery of the sealing box 100 is provided with an air inlet 120 suitable for connection with an exhaust port (not shown in the figure). The opening direction of the air outlet 110 is set at an angle to the opening direction of the air inlet 120. The oil collection box 200 is detachably disposed at the lower end of the sealing box 100. The interior of the sealing box 100 and the oil collection box 200 forms a cavity 300. The air outlet 110 and the air inlet 120 are respectively connected to the cavity 300. The sealing structure is disposed at the connection between the sealing box 100 and the oil collection box 200.

[0038] In use, the air inlet 120 is adapted to connect with the exhaust port of the baking equipment and receive oily gas, allowing the oily gas to enter the cavity 300. The upper air outlet 110 is adapted to connect to the exhaust gas duct to draw the oily gas away from the cavity 300. After the oily gas liquefies in the inner cavity 300 and the air outlet 110, it converges and drips downwards under the action of gravity into the oil collection box 200 located below the air inlet 120, thereby preventing the ink from flowing back into the air inlet 120 and re-entering the baking equipment along the air inlet 120.

[0039] Understandably, the horizontal orientation of the air inlet 120 allows the oily gas continuously entering the cavity 300 to blow the reliquefied ink from the port of the air inlet 120 near the cavity 300 into the inner cavity of the oil collection box 200, instead of entering the air inlet 120 itself.

[0040] Understandably, the sealing box 100 and the oil collection box 200 are connected in a detachable manner, which makes it easy to disassemble and clean the oil collection box 200. Only the ink collected in the oil collection box 200 needs to be cleaned to restore the structure to use. There is no need to disassemble the exhaust port and exhaust pipe connection port for cleaning and maintenance.

[0041] Understandably, the sealing structure 400 is designed to prevent ink from leaking from the connection between the sealing box 100 and the oil collection box 200, thus avoiding ink contamination of the external environment.

[0042] Understandably, the diameters of the air inlet 120 and the air outlet 110 remain unchanged.

[0043] In some specific embodiments of this utility model, an oil baffle 500 is also included. The oil baffle 500 is obliquely arranged in the cavity 300. The upper end of the oil baffle 500 is connected to the upper end of the sealing box 100 and close to the air inlet 120. The lower end of the oil baffle 500 is connected to the lower end of the oil collection box 200 and away from the air inlet 120. The length of the oil baffle 500 in the left-right direction is less than the length of the cavity 300 in the left-right direction.

[0044] like Figure 2 , Figure 3 and Figure 4As shown, in this embodiment, the oil baffle 500 is inclinedly disposed within the cavity 300. The upper end of the oil baffle 500 is secured in the inner cavity of the sealing box 100, and the lower end of the oil baffle 500 is secured in the inner cavity of the oil collection box 200, thereby achieving stable placement. Furthermore, it can be easily removed during disassembly and cleaning. The largest surface of the oil baffle 500 faces the air inlet 120, maximizing its contact with the oily gas entering the cavity 300 from the air inlet 120. This allows oil molecules in the oily gas to contact the oil baffle 500, adhere to it, and, under the influence of gravity, flow along the inclined angle of the oil baffle 500 into the bottom of the inner cavity of the oil collection box 200 or drip directly onto the bottom of the inner cavity of the oil collection box 200. The length of the oil baffle 500 in the left-right direction is less than the length of the cavity 300 in the left-right direction. This prevents the oil baffle 500 from completely sealing the cavity 300, allowing the oily gas entering from the air inlet 120 to come into contact with the oil baffle 500 and pass through one or both sides of the oil baffle 500 before entering the air outlet 110.

[0045] Understandably, when the cross-sectional area of ​​the air outlet 110 is smaller than the cross-sectional area of ​​the cavity 300, the oil baffle 500 can be fixedly installed inside the cavity 300 and will not be blown away by the air blown in from the air inlet 120. When the cross-sectional area of ​​the air outlet 110 is greater than or equal to the cross-sectional area of ​​the cavity 300, and when the cross-sectional area of ​​the air outlet 110 is the same as the cross-sectional area of ​​the cavity 300, a connector (not shown in the drawing) needs to be provided on the sealing box 100 to connect with the oil baffle 500 to ensure that the connector 500 will not be blown away by the air blown in from the air inlet 120. The connector can be a common connection structure such as bolts or screws, extending from the outside of the sealing box 100 to the inner cavity 300 to achieve a fixed connection with the baffle plate 500.

[0046] It is understandable that the shape of the oil baffle 500 can be adapted to the shape of the cavity 300. When the cavity 300 is a rectangular prism, the oil baffle 500 can be a rectangular plate; when the cavity 300 is a triangular prism, the oil baffle 500 can be a triangular plate; when the cavity 300 is a pentagonal prism, the oil baffle 500 can be a triangular plate, a rectangular plate, or other compatible irregularly shaped plates.

[0047] In some specific embodiments of this utility model, the oil baffle 500 has a through groove 510. For example... Figure 3 As shown, in this embodiment, the oil baffle 500 has five through slots 510, which can facilitate the oily gas to quickly reach the air outlet 110 from the through slots 510, and also facilitate the liquefied ink to drip from the through slots 510 to the bottom of the inner cavity of the oil collection box 200.

[0048] It is understandable that when the oil baffle 500 has a through groove and the oil baffle 510 has a through groove, the length of the oil baffle 500 in the left and right direction can be equal to the length of the cavity 300 in the left and right direction, and the oily gas can pass through the through groove 510 through the oil baffle 500 and enter the air outlet 110.

[0049] Understandably, the size and number of channels 510 should be set appropriately. Too many channels 510 or too large an area will weaken the adsorption of ink by the oil baffle plate 500. Too few channels 510 or too small an area will affect the flow efficiency of oil-laden gas.

[0050] In some specific embodiments of this utility model, the cross-sectional area of ​​the air outlet 110 is smaller than the area of ​​the upper surface of the sealing box 100. For example... Figure 1 and Figure 2 As shown, in this embodiment, by setting the cross-sectional area of ​​the air outlet 110 to be smaller than the area of ​​the upper surface of the sealing box 100, the upper surface of the sealing box 100 can assist the air outlet 110 in connecting to an external pipe (not shown in the figure), and the external pipe can be placed on the upper surface of the sealing box 100.

[0051] In some specific embodiments of this utility model, an installation part 210 is provided on the outer side of the oil collection box 200, and the installation part 210 has an installation hole 211.

[0052] like Figure 2 and Figure 4 As shown in this embodiment, two mounting portions 210 are provided on each of the left and right sides of the oil collection box 200. Each mounting portion 210 has a mounting hole 211, which can install the oil collection box 200 onto other structures and achieve stable placement on other structures.

[0053] In some specific embodiments of this utility model, a snap-fit ​​component 600 is also included, and the sealing box 100 and the oil collection box 200 are connected by the snap-fit ​​component 600. For example... Figure 1 and Figure 3 As shown in this embodiment, two buckle members 600 are provided on each of the left and right sides, which can stably connect the sealing box 100 and the oil collection box 200, and can be quickly disassembled, making it convenient to disassemble and clean the oil collection box 200.

[0054] In some specific embodiments of this utility model, the sealing structure 400 is a high-temperature sealing strip. One end of the high-temperature sealing strip is connected to the bottom surface of the sealing box 100, and the other end of the high-temperature sealing strip is connected to the top surface of the oil collection box 200. The fastener 600 is in contact with the high-temperature sealing strip.

[0055] like Figure 1 and Figure 2As shown, in this embodiment, the sealing structure 400 is a high-temperature sealing strip, which is sandwiched between the sealing box 100 and the oil collection box 200. The high-temperature sealing strip ensures that the sealing box 100 and the oil collection box 200 are tightly connected without leakage, while also preventing deformation due to the tight connection. It is understood that using a high-temperature sealing strip in the sealing structure 400 can prevent failure due to excessively high structural temperatures, and the high-temperature sealing strip has good corrosion resistance. It is also understood that the high-temperature sealing strip has various cross-sectional shapes, commonly L-shaped, T-shaped, or other irregular shapes.

[0056] In some specific embodiments of this utility model, the opening direction of the air outlet 110 is at a 90-degree angle to the opening direction of the air inlet 120. For example... Figure 1 and Figure 2 As shown, in this embodiment, the air outlet 110 is horizontally arranged on the front side of the sealing box 100, and the air inlet 120 is vertically arranged at the top, which facilitates connection with the outside.

[0057] In some specific embodiments of this utility model, the oil collection box 200 is die-cast from a single sheet of galvanized iron, such as... Figure 1 and Figure 2 As shown, the oil collection box 200 is made of a single sheet of galvanized iron through die casting to form a seamless structure, thus preventing leakage.

[0058] This utility model embodiment also discloses a baking device, including the above-mentioned anti-drip oil structure of the exhaust duct. The anti-drip oil structure of the exhaust duct is installed on the surface of the baking oven. The air inlet 120 is connected to the exhaust port of the baking oven, and the air outlet 110 is connected to the exhaust duct.

[0059] When using the device, the product to be processed is placed inside the baking device. The exhaust port of the baking device is connected to the air inlet 110, allowing oily gas to enter the cavity 300 through the air inlet 110 and come into contact with the oil baffle 500. After passing through the oil baffle 500, it enters the air outlet 110. The upper air outlet 110 is connected to the exhaust pipe, which draws the oily gas out of the cavity 300. After the oily gas liquefies in the cavity 300 and the air outlet 110, it flows downwards under the action of gravity and drips into the oil collection box 200 located below the air inlet 120. This prevents the ink from flowing back into the air inlet 120 and re-entering the baking device along the air inlet 120. This avoids product quality abnormalities caused by liquid ink dripping back onto the circuit board and the potential fire hazard caused by dripping onto the heating element.

[0060] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A drip-proof structure for exhaust ducts, characterized in that, include: A sealed box (100) has an air outlet (110) at its upper end that is suitable for connection with an exhaust duct, and an air inlet (120) is horizontally opened on the periphery of the sealed box (100) that is suitable for connection with an exhaust vent. The opening direction of the air outlet (110) is set at an angle to the opening direction of the air inlet (120). An oil collection box (200) is detachably disposed at the lower end of the sealing box (100). The sealing box (100) and the interior of the oil collection box (200) form a cavity (300). The air outlet (110) and the air inlet (120) are respectively connected to the cavity (300). A sealing structure (400) is provided at the connection between the sealing box (100) and the oil collection box (200).

2. The anti-drip oil structure for an exhaust duct according to claim 1, characterized in that, It also includes an oil baffle (500), which is obliquely disposed in the cavity (300). The upper end of the oil baffle (500) is connected to the upper end of the sealing box (100) and close to the air inlet (120). The lower end of the oil baffle (500) is connected to the lower end of the oil collection box (200) and away from the air inlet (120). The length of the oil baffle (500) in the left-right direction is less than the length of the cavity (300) in the left-right direction.

3. The anti-drip oil structure for an exhaust duct according to claim 2, characterized in that, The oil baffle (500) has a through groove (510).

4. The anti-drip oil structure for an exhaust duct according to claim 1, characterized in that, The cross-sectional area of ​​the air outlet (110) is smaller than the area of ​​the upper surface of the sealing box (100).

5. The anti-drip oil structure for an exhaust duct according to claim 1, characterized in that, The oil collection box (200) has an installation part (210) on its outer side, and the installation part (210) has an installation hole (211).

6. The anti-drip oil structure for an exhaust duct according to claim 1, characterized in that, It also includes a snap fastener (600), through which the sealing box (100) and the oil collection box (200) are connected.

7. The anti-drip oil structure for an exhaust duct according to claim 6, characterized in that, The sealing structure (400) is a high-temperature sealing strip. One end of the high-temperature sealing strip is connected to the bottom surface of the sealing box (100), and the other end of the high-temperature sealing strip is connected to the top surface of the oil collection box (200). The fastener (600) is in contact with the high-temperature sealing strip.

8. The anti-drip oil structure for an exhaust duct according to claim 1, characterized in that, The opening direction of the air outlet (110) is at a 90-degree angle to the opening direction of the air inlet (120).

9. The anti-drip oil structure for an exhaust duct according to claim 1, characterized in that, The oil collection box (200) is made of a single sheet of galvanized iron.

10. A baking apparatus, comprising a baking oven and an exhaust duct, characterized in that, It also includes the oil-drip prevention structure for the exhaust duct as described in any one of claims 1 to 9, wherein the oil-drip prevention structure for the exhaust duct is installed on the surface of the baking oven, the air inlet (120) is connected to the exhaust outlet of the baking oven, and the air outlet (110) is connected to the exhaust duct.

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