PCB drying and cooling apparatus

Abstract

The utility model belongs to the field of PCB manufacturing technology discloses a kind of PCB drying cooling equipment, including box, fan, cooling device and air knife.Use, start fan, the air in the inside of box is entered into cooling device by second air inlet, cooling device is cooled to the air of suction, again by second air outlet into fan, fan is sent to air knife by first air outlet after cooling, blow out to PCB board surface by third air outlet, to dry, cooling to PCB.By fan suction the air in the inside of box, again by air knife discharge to the inside of box, realize the internal circulation of equipment inside air, reduce the suction of dust in production environment.And the internal circulation of equipment inside air, cooled air is discharged into the inside of box again, can make the air in the inside of box stable at lower temperature, avoid energy waste.Further, after the air after cooling device cooling enters fan, temperature will be appropriately increased, can reduce the generation of water mist.

Description

Technical Field

[0001] This utility model relates to the field of PCB manufacturing technology, and in particular to a PCB drying and cooling device. Background Technology

[0002] In the complex manufacturing process of PCBs, wet processes such as etching, electroplating, developing, and film removal are crucial. After each wet process, various chemical solutions remain on the PCB surface, which must be thoroughly washed and dried to prevent cross-contamination, corrosion of circuits, or defects in subsequent processes.

[0003] The current dry board process is usually as follows: After the PCB is treated with chemicals and washed in multiple stages, most of the surface water droplets are removed by a high-pressure air knife. Then, it passes through an infrared heating or hot air drying module to evaporate the residual moisture. Finally, a cold air drying device rapidly reduces the temperature of the PCB surface after high-temperature baking to near room temperature. This effectively avoids the rapid oxidation of the high-temperature board surface when it comes into contact with air, which would generate an oxide layer and cause fatal defects such as changes in circuit impedance and poor solderability, resulting in product scrap.

[0004] Existing cold air drying devices use a fan to draw air directly from the production environment where the equipment is located as the air source. The air is filtered and cooled by a filter and then blown onto the PCB board surface to achieve the purpose of cooling the PCB. Finally, the air is discharged from the equipment through the exhaust port.

[0005] However, the filters have limited precision and cannot filter out fine dust, lint, and other pollutants in the production environment. These pollutants are blown onto the still-warm PCB surface by the airflow, reducing PCB quality. Furthermore, the air temperature rises after passing through the fan, causing water vapor to form when it encounters the cooler. This water vapor, upon contact with the PCB surface, can lead to oxidation and render the PCB unusable. Moreover, the cooled air is directly discharged after cooling the PCB, meaning the cooled air is used only once and then discharged as waste gas, resulting in energy waste. Utility Model Content

[0006] The purpose of this utility model is to provide a PCB drying and cooling device. The fan draws in air from inside the PCB drying and cooling device to achieve internal air circulation, reduce dust pollution in the environment, stabilize the air inside the PCB drying and cooling device at a lower temperature, and avoid energy waste. Moreover, the temperature of the cooled air will be appropriately increased after entering the fan, which can reduce the generation of water mist.

[0007] To achieve this objective, the present invention adopts the following technical solution:

[0008] A PCB drying and cooling device is provided, comprising:

[0009] Box;

[0010] A fan is installed inside the housing, and the fan is provided with a first air inlet and a first air outlet.

[0011] A cooling device is provided inside the housing. The cooling device is provided with a second air inlet and a second air outlet. The second air outlet is connected to the first air inlet. The second air inlet is located inside the housing.

[0012] An air knife is disposed inside the housing and has a third air inlet and a third air outlet. The third air inlet is connected to the first air outlet, and the third air outlet faces the PCB.

[0013] Optionally, a first partition plate is provided inside the housing, which divides the interior of the housing into a first installation space and a second installation space. The fan and the cooling device are located in the first installation space, and the second air inlet is connected to the second installation space. The air knife is located in the second installation space.

[0014] Optionally, the PCB drying and cooling equipment further includes a filter device, which is disposed in the first installation space. The filter device is provided with a fourth air inlet and a fourth air outlet. The fourth air inlet is connected to the first air outlet, and the fourth air outlet is connected to the third air inlet.

[0015] Optionally, the fourth air outlet is connected to the third air inlet via a duct, the duct is located within the second installation space, the second installation space is provided with a second partition plate, the air knife is connected to the second partition plate, and the air knife and the duct are respectively located on both sides of the second partition plate.

[0016] Optionally, the cooling device includes a housing and a cooling coil, the cooling coil being disposed inside the housing, and the second air inlet and the second air outlet both being disposed within the housing.

[0017] Optionally, the cooling device further includes a coil fixing member, which is connected to the inner wall of the housing, and the cooling coil is detachably connected to the coil fixing member.

[0018] Optionally, a first flange is connected to the housing, and a second flange is connected to the first partition plate, with the first flange and the second flange connected by a connector.

[0019] Optionally, the cooling device further includes a drain pipe, one end of which communicates with the interior of the housing, and the other end of which extends outside the housing.

[0020] Optionally, the PCB drying and cooling equipment further includes an air inlet box, and the second air outlet is connected to the first air inlet through the air inlet box.

[0021] Optionally, two air knives are provided, the two air knives are arranged in parallel, and the third air outlets of the two air knives are arranged opposite each other, so that the PCB can pass between the two air knives.

[0022] The beneficial effects of this utility model are:

[0023] This utility model provides a PCB drying and cooling device, including a housing, a fan, a cooling unit, and an air knife. The fan is located inside the housing and has a first air inlet and a first air outlet. The cooling unit is also located inside the housing and has a second air inlet and a second air outlet, which are connected to the first air inlet. The second air inlet is located inside the housing. The air knife is located inside the housing and has a third air inlet and a third air outlet, which are connected to the first air outlet and face the PCB. In use, the fan is started, and air from inside the housing enters the cooling unit through the second air inlet. The cooling unit cools the incoming air, which then enters the fan through the second air outlet. The fan delivers the cooled air to the air knife through the first air outlet and blows it out onto the PCB surface through the third air outlet, thereby drying and cooling the PCB. In this PCB drying and cooling equipment, a fan draws in air from inside the chamber and then discharges it through an air knife, achieving internal air circulation. This reduces the intake of dust from the production environment and the amount of dust blown onto the PCB surface, improving PCB quality. Furthermore, the internal air circulation, with the cooled air being discharged back into the chamber, maintains a stable lower temperature inside the chamber, preventing energy waste. Moreover, the air cooled by the cooling device enters the fan at a slightly higher temperature, reducing water mist generation and lowering the probability of water mist contacting the PCB surface and causing oxidation, thus improving PCB yield. Attached Figure Description

[0024] Figure 1 This is a cross-sectional view of the PCB drying and cooling equipment and the PCB provided in this embodiment of the utility model;

[0025] Figure 2 This is a schematic diagram of the cooling device provided in an embodiment of the present invention.

[0026] In the picture:

[0027] 1. Housing; 11. First installation space; 12. Second installation space;

[0028] 2. Fan; 3. Cooling device; 31. Shell; 32. Cooling coil; 33. Coil fastener; 34. First flange; 35. Drain pipe;

[0029] 4. Air knife; 5. First partition plate; 6. Filter device; 7. Second partition plate; 8. Second flange; 9. Air inlet box;

[0030] 100. PCB. Detailed Implementation

[0031] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0032] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0033] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0034] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0035] like Figure 1As shown, this embodiment provides a PCB drying and cooling device, which includes a housing 1, a fan 2, a cooling device 3, and an air knife 4. The fan 2 is disposed inside the housing 1 and has a first air inlet and a first air outlet. The cooling device 3 is disposed inside the housing 1 and has a second air inlet and a second air outlet. The second air outlet communicates with the first air inlet and is located inside the housing 1. The air knife 4 is disposed inside the housing 1 and has a third air inlet and a third air outlet. The third air inlet communicates with the first air outlet and faces the PCB 100. Specifically, the fan 2 is fixed to the bottom wall of the housing 1 via a connector. The air knife 4 is disposed above the fan 2, extends horizontally, and is fixed to the side wall of the housing 1 via a connector. The specific structure of the fan 2 is based on existing technology and will not be described in detail here.

[0036] In operation, fan 2 is started. Under the action of fan 2, air inside chamber 1 enters the cooling device 3 through the second air inlet. The cooling device 3 cools the intake air, which then enters fan 2 through the second air outlet. Fan 2 delivers the cooled air to the air knife 4 through the first air outlet, and then blows it out to the PCB 100 board surface through the third air outlet, thereby drying and cooling the PCB 100. In this PCB drying and cooling equipment, fan 2 draws in air from inside chamber 1 and then discharges it into chamber 1 through air knife 4, realizing internal air circulation within the equipment. This reduces the intake of dust from the production environment and the amount of dust blown onto the PCB 100 board surface, improving the quality of the PCB 100. Furthermore, the internal air circulation, with the cooled air being discharged back into chamber 1, keeps the air inside chamber 1 at a stable lower temperature, avoiding energy waste. Furthermore, after the air is cooled by the cooling device 3, its temperature will rise appropriately when it enters the fan 2, which can reduce the generation of water mist, reduce the probability of water mist contacting the PCB100 board surface and causing oxidation of the PCB100 board surface, and improve the yield of PCB100.

[0037] Optionally, a first partition plate 5 is provided inside the housing 1, dividing the interior of the housing 1 into a first installation space 11 and a second installation space 12. The fan 2 and the cooling device 3 are located in the first installation space 11, and the second air inlet is connected to the second installation space 12. The air knife 4 is located in the second installation space 12. The air knife 4 blows cooled air into the second installation space 12, and then the cooled air is drawn into the cooling device 3 through the second air inlet. This prevents cooled air from entering the first installation space 11, ensuring that the air drawn into the cooling device 3 is as cool as possible from the second installation space 12, further avoiding energy waste.

[0038] Specifically, the first partition plate 5 is arranged horizontally and welded to the inner wall of the housing 1. The first mounting space 11 is located below the second mounting space 12. The first mounting space 11 is a sealed space, and the housing 1 corresponding to the second mounting space 12 has an opening (not shown in the figure) for transporting the PCB 100. The first partition plate 5 has a through hole, and the second air inlet communicates with the second mounting space 12 through the through hole.

[0039] Optionally, two air knives 4 are provided, arranged in parallel with their third air outlets facing each other. The PCB 100 can pass between the two air knives 4, and the two air knives 4 respectively dry and cool both sides of the PCB 100, improving the cooling efficiency of the PCB 100. Specifically, the two air knives 4 are arranged vertically at intervals, with the air knife 4 located above the PCB 100 being the upper air knife and the air knife 4 located below the PCB 100 being the lower air knife.

[0040] Optionally, the PCB drying and cooling equipment further includes a filter device 6, which is disposed in the first installation space 11. The filter device 6 has a fourth air inlet and a fourth air outlet. The fourth air inlet is connected to the first air outlet, and the fourth air outlet is connected to the third air inlet. The filter device 6 can filter the dust drawn into the fan 2, further reducing the dust blown onto the surface of the PCB 100 and improving the quality of the PCB 100. The filter device is a high-efficiency particulate air (HEPA) filter. The use of filter device 6 is prior art in this application and will not be described in detail here. The filter device 6 and the fan 2 can be connected via a duct.

[0041] Optionally, the fourth air outlet and the third air inlet are connected by a duct. The duct facilitates this connection. The duct is located within the second installation space 12, which is equipped with a second partition plate 7. The air knife 4 is connected to the second partition plate 7. The air knife 4 and the duct are located on opposite sides of the second partition plate 7, facilitating the installation of the air knife 4 while ensuring the duct is within the second installation space 12, resulting in a more aesthetically pleasing overall structure for the PCB drying and cooling equipment.

[0042] Specifically, the second partition plate 7 is arranged vertically, with its top end welded to the inner wall of the housing 1 and its bottom end welded to the first partition plate 5. The second partition plate 7 has two mounting holes. The ends of the upper and lower air knives with the third air inlet extend into the mounting holes and overlap the inner wall of the mounting holes. The ends of the upper and lower air knives away from the third air inlet are fixed to the side wall of the housing 1.

[0043] Optionally, such as Figure 1 and Figure 2As shown, the cooling device 3 includes a housing 31 and a cooling coil 32. The cooling coil 32 is disposed inside the housing 31. The second air inlet and the second air outlet are both disposed in the housing 31. The housing 31 is used for air passage, and the cooling coil 32 is used for cooling the air inside the housing 31. Specifically, the second air inlet is disposed at the top of the housing 31, and the second air outlet is disposed on the side wall of the housing 31.

[0044] Furthermore, the cooling device 3 also includes coil fixing members 33, which are connected to the inner wall of the housing 31. The cooling coil 32 is detachably connected to the coil fixing members 33, which can fix the cooling coil 32 and facilitate the installation and removal of the cooling coil 32. Specifically, the coil fixing members 33 are clamping plates. Four coil fixing members 33 are provided, with two coil fixing members 33 located near the upper side of the cooling coil 32 and the other two near the lower side of the cooling coil 32. The cooling coil 32 is clamped to the four coil fixing members 33.

[0045] Optionally, a first flange 34 is connected to the housing 31, and a second flange 8 is connected to the first partition plate 5. The first flange 34 and the second flange 8 are connected by a connector. By setting the first flange 34 and the second flange 8, it is convenient to fix the cooling device 3.

[0046] Specifically, the first flange 34 is fixed to the top of the housing 31, and the second flange 8 is fixed to the side of the first partition plate 5 facing the first mounting space 11. The connecting element is a screw; the first flange 34 has a connecting hole, and the second flange 8 has a threaded hole. The screw passes through the connecting hole and is threaded into the threaded hole, thereby fixing the first flange 34 and the second flange 8. In other embodiments, the first flange 34 may also have a threaded hole, and the second flange 8 may have a connecting hole.

[0047] Optionally, the cooling device 3 also includes a drain pipe 35, one end of which communicates with the interior of the housing 31, and the other end extends out of the casing 1. Air cooling inside the housing 31 produces condensate, which is drained through the drain pipe 35 to prevent water accumulation inside the housing 31. Specifically, a drain hole is provided at the bottom of the housing 31, one end of the drain pipe 35 communicates with the drain hole, and the other end extends out of the casing 1 and corresponds to the condensate collection tank for collecting the condensate. The drain pipe 35 is made of PE.

[0048] Optionally, the PCB drying and cooling equipment also includes an air inlet box 9, through which the second air outlet and the first air inlet are connected. The air inlet box 9 can optimize the airflow of the fan 2 and improve the working efficiency of the fan 2.

[0049] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A PCB drying and cooling apparatus, characterized by, include: Box (1); A fan (2) is installed inside the housing (1) and is provided with a first air inlet and a first air outlet. Cooling device (3), the cooling device (3) is disposed inside the box (1), the cooling device (3) is provided with a second air inlet and a second air outlet, the second air outlet is connected to the first air inlet, and the second air inlet is located inside the box (1); Air knife (4), the air knife (4) is set inside the housing (1) and is provided with a third air inlet and a third air outlet. The third air inlet is connected to the first air outlet and the third air outlet faces the PCB (100).

2. The PCB drying and cooling apparatus according to claim 1, characterized in that, The housing (1) is provided with a first partition plate (5), which divides the interior of the housing (1) into a first installation space (11) and a second installation space (12). The fan (2) and the cooling device (3) are located in the first installation space (11), and the second air inlet is connected to the second installation space (12). The air knife (4) is located in the second installation space (12).

3. The PCB drying and cooling equipment according to claim 2, characterized in that, The PCB drying and cooling equipment also includes a filter device (6), which is disposed in the first installation space (11). The filter device (6) is provided with a fourth air inlet and a fourth air outlet. The fourth air inlet is connected to the first air outlet, and the fourth air outlet is connected to the third air inlet.

4. The PCB drying and cooling equipment according to claim 3, characterized in that, The fourth air outlet is connected to the third air inlet through a duct. The duct is located in the second installation space (12). The second installation space (12) is provided with a second partition plate (7). The air knife (4) is connected to the second partition plate (7). The air knife (4) and the duct are located on both sides of the second partition plate (7).

5. The PCB drying and cooling apparatus according to claim 2, wherein The cooling device (3) includes a housing (31) and a cooling coil (32), the cooling coil (32) being disposed inside the housing (31), and the second air inlet and the second air outlet being disposed inside the housing (31).

6. The PCB drying and cooling equipment according to claim 5, characterized in that, The cooling device (3) further includes a coil fixing member (33), which is connected to the inner wall of the housing (31), and the cooling coil (32) is detachably connected to the coil fixing member (33).

7. The PCB drying and cooling equipment according to claim 5, characterized in that, A first flange (34) is connected to the housing (31), and a second flange (8) is connected to the first partition plate (5). The first flange (34) and the second flange (8) are connected by a connector.

8. The PCB drying and cooling apparatus of claim 5, wherein, The cooling device (3) also includes a drain pipe (35), one end of which is connected to the interior of the housing (31), and the other end extends out of the box (1).

9. The PCB drying and cooling apparatus according to any one of claims 1-8, characterized in that, The PCB drying and cooling equipment also includes an air inlet box (9), and the second air outlet is connected to the first air inlet through the air inlet box (9).

10. The PCB drying and cooling apparatus according to any one of claims 1-8, characterized in that, There are two air knives (4), which are arranged in parallel and the third air outlets of the two air knives (4) are arranged opposite each other. The PCB (100) can pass between the two air knives (4).

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