Anti-oxidation protection reflow soldering oven gas circulation device

Abstract

The utility model discloses an anti-oxidation protection reflow soldering oven gas circulation device, which relates to the technical field of gas circulation and comprises an oven body, a fan is mounted at the top of the oven body, an air inlet channel is mounted at the top end of the oven body, an air outlet of the fan is communicated with the air inlet channel, and a plurality of branch pipelines are mounted in the oven body. The cleaning structure is arranged to clean the filter screen, and when gas passes through the treatment channel, the propeller type stirrer rotates under the action of gas flow, so that the cleaning brush is driven to clean the filter screen; according to the device, a filter screen is mounted and dismounted through the arrangement of a mounting structure, a plurality of pull rings are shifted inwards to drive a sliding block and a clamping block to face the inner end, and then a mounting ring is inserted into a treatment channel until the mounting ring moves to a groove corresponding to the filter screen or an activated carbon plate; and the clamping blocks can pop out under the action of the springs and are clamped into the grooves in the inner side wall of the processing channel, so that the mounting ring is fixed.

Description

Technical Field

[0001] This utility model relates to the field of gas circulation technology, specifically an anti-oxidation protection gas circulation device for a reflow oven. Background Technology

[0002] In the electronics manufacturing industry, reflow soldering is a common soldering process used to solder surface mount components (SMD) onto printed circuit boards (PCBs). During reflow soldering, the temperature in the soldering area rises, and the metal surface is prone to oxidation reaction with oxygen in the air, which affects the soldering quality and leads to problems such as cold solder joints and poor connections. In the reflow soldering process, the gas environment inside the oven has a significant impact on the soldering quality. In order to prevent oxidation during the soldering process, the gas inside the oven needs to be circulated to maintain the purity and stability of the gas.

[0003] In reflow oven gas circulation systems, filters and activated carbon plates are commonly used for gas purification. However, with prolonged use, the filter mesh in traditional reflow oven gas circulation systems may become clogged with dust, impurities, and other particulate matter. The activated carbon plates, on the other hand, gradually reach adsorption saturation due to the continuous adsorption of harmful substances in the gas, thus reducing the purification effect of the system. Therefore, those skilled in the art have provided an oxidation-protected reflow oven gas circulation device to solve the problems mentioned in the background art. Utility Model Content

[0004] The purpose of this invention is to provide an anti-oxidation protection gas circulation device for reflow ovens to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] An anti-oxidation protection reflow oven gas circulation device includes an oven body, a processing channel, a cleaning structure, and an installation structure. The device is characterized in that a fan is installed on the top of the oven body, and an air inlet channel is installed at the top of the oven body. The air outlet of the fan is connected to the air inlet channel. Several branch pipes are installed inside the oven body, and these branch pipes are connected to the air inlet channel. One end of each branch pipe penetrates the oven body and connects to an air outlet channel. The air outlet channel is connected to the processing channel via a flange. The processing channel contains a cleaning structure and an installation structure. The end of the processing channel furthest from the air outlet channel is connected to the air inlet of the fan via a flange.

[0007] As a further embodiment of this utility model: the cleaning structure includes a fixed block, a threaded groove, a mounting plate, a through groove, a fixing bolt, a turntable, a rotating shaft, a propeller-type agitator, and a cleaning brush. The top of the processing channel is fixedly connected to the fixed block, and the fixed block has two threaded grooves inside. The threaded grooves are threaded with fixing bolts, and one end of the fixing bolts is fixedly connected to the turntable.

[0008] As a further improvement of this utility model: a mounting plate is inserted into the fixing bolt, and the mounting plate has two through slots that are compatible with the fixing bolt, and a rotating shaft is rotatably connected to the mounting plate.

[0009] As a further embodiment of this utility model: a propeller-type agitator is fixedly connected to one end of the rotating shaft, and a cleaning brush is fixedly connected to the end of the rotating shaft away from the propeller-type agitator.

[0010] As a further embodiment of this utility model: the installation structure includes a groove, an installation ring, a filter screen, an activated carbon plate, a guide rod, a slider, a snap-fit ​​block, a spring, a sliding groove, a pull ring, and a movable groove. Two sets of grooves arranged in a ring array are provided on the inner side wall of the processing channel, and each set of grooves has four grooves. An installation ring is provided inside the processing channel and at each of the two sets of grooves. A filter screen is fixedly connected inside one installation ring, and an activated carbon plate is fixedly connected inside the other installation ring.

[0011] As a further improvement of this utility model: four movable grooves are provided on the outer walls of both mounting rings, and two guide rods are fixedly connected inside the movable grooves. A slider is slidably connected to the guide rod. A spring is provided inside the movable groove, and one end of the spring is fixedly connected to the slider. A snap-fit ​​block that matches the groove is fixedly connected to the end of the slider away from the spring.

[0012] As a further improvement of this utility model: one end of the mounting ring is provided with a groove that matches the slider, and one end of the slider is fixedly connected to a pull ring through the groove.

[0013] As a further embodiment of this utility model: a dust discharge trough is provided at the bottom of the processing channel, and the dust discharge trough is located directly below the cleaning brush. A tapered tube is fixedly connected to the bottom of the processing channel and at the dust discharge trough, and a collection pipe is connected to the tapered tube through a flange.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. This device cleans the filter screen through a cleaning structure. When gas passes through the processing channel, the propeller agitator rotates under the action of the airflow, which in turn drives the rotating shaft and cleaning brush to rotate. This causes the cleaning brush to clean the filter screen, preventing excessive accumulation of impurities on the filter screen and affecting the filtration effect. The impurities and particles brushed off by the cleaning brush fall into the dust discharge trough and are collected through the conical tube and collection tube for easy cleaning. The fixing block is fixed to the top of the processing channel, and the mounting plate is inserted into the fixing bolt through the through groove. By rotating the turntable, the fixing bolt can be rotated to fix the mounting plate, which makes it convenient for staff to maintain and replace the propeller agitator, cleaning brush and other components regularly.

[0016] 2. When the gas passes through the treatment channel of this device, the filter screen can intercept larger particles of impurities, while the activated carbon plate can adsorb harmful gases and flux volatiles in the gas, further purifying the gas.

[0017] 3. This device uses an installation structure to install and remove the filter screen. By pushing several pull rings inward, the slider and locking block are moved inward to one end. Then, the installation ring is inserted into the processing channel until it moves to the groove corresponding to the filter screen or activated carbon plate. The locking block will pop out under the action of the spring and lock into the groove on the inner side wall of the processing channel, thus fixing the installation ring. The operation is convenient and quick. Attached Figure Description

[0018] Figure 1 This is a front view of a gas circulation device for an oxidation-protected reflow oven.

[0019] Figure 2 This is a schematic diagram of the processing channel in a gas circulation device for an anti-oxidation protection reflow soldering oven.

[0020] Figure 3 This is a perspective view of the mounting plate in a gas circulation device for an anti-oxidation protection reflow soldering oven.

[0021] Figure 4 This is an enlarged view of A in a gas circulation device for an anti-oxidation protection reflow soldering oven.

[0022] Figure 5 This is a side view of a filter screen in a gas circulation device for an anti-oxidation protection reflow oven.

[0023] In the diagram: 1. Furnace body; 2. Fan; 3. Air inlet channel; 4. Branch pipe; 5. Air outlet channel; 6. Processing channel; 7. Dust removal trough; 8. Conical pipe; 9. Collection pipe; 10. Fixing block; 11. Threaded groove; 12. Mounting plate; 13. Through groove; 14. Fixing bolt; 15. Turntable; 16. Rotating shaft; 17. Propeller agitator; 18. Cleaning brush; 19. Groove; 20. Mounting ring; 21. Filter screen; 22. Activated carbon plate; 23. Guide rod; 24. Slider; 25. Snap-fit ​​block; 26. Spring; 27. Slide groove; 28. Pull ring; 29. ​​Movable groove. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example 1

[0025] Reference Figure 1-3 This embodiment provides an anti-oxidation protection reflow oven gas circulation device, including an oven body 1, a processing channel 6, a cleaning structure, and an installation structure. The oven body 1 is characterized by having a fan 2 installed on its top and an air inlet channel 3 installed at the top of the oven body 1. The air outlet of the fan 2 is connected to the air inlet channel 3. Several branch pipes 4 are installed inside the oven body 1, and these branch pipes 4 are connected to the air inlet channel 3. One end of each branch pipe 4 penetrates the oven body 1 and is connected to an air outlet channel 5. The air outlet channel 5 is connected to the processing channel 6 via a flange. The processing channel 6 contains a cleaning structure and an installation structure. The end of the processing channel 6 furthest from the air outlet channel 5 is connected to the air inlet of the fan 2 via a flange.

[0026] The cleaning structure includes a fixed block 10, a threaded groove 11, a mounting plate 12, a through groove 13, a fixing bolt 14, a turntable 15, a rotating shaft 16, a propeller-type agitator 17, and a cleaning brush 18. The fixed block 10 is fixedly connected to the top of the inside of the processing channel 6, and two threaded grooves 11 are opened inside the fixed block 10. The threaded grooves 11 are threadedly connected to the fixing bolts 14, and one end of the fixing bolts 14 is fixedly connected to the turntable 15.

[0027] A mounting plate 12 is inserted into the fixing bolt 14, and two through slots 13 adapted to the fixing bolt 14 are provided on the mounting plate 12. A rotating shaft 16 is rotatably connected to the mounting plate 12. A propeller-type agitator 17 is fixedly connected to one end of the rotating shaft 16, and a cleaning brush 18 is fixedly connected to the other end of the rotating shaft 16 away from the propeller-type agitator 17.

[0028] The bottom of the processing channel 6 is provided with a dust discharge trough 7, which is located directly below the cleaning brush 18. A tapered tube 8 is fixedly connected to the bottom of the processing channel 6 and located at the dust discharge trough 7, and a collection tube 9 is connected to the tapered tube 8 through a flange.

[0029] In this embodiment, the blower 2 is installed on top of the furnace body 1. After the blower 2 is started, the outlet of the blower 2 forces the gas into the inlet channel 3. The gas enters several branch pipes 4 inside the furnace body 1 through the inlet channel 3. The branch pipes 4 evenly distribute the gas to various parts of the furnace body 1, providing anti-oxidation protection for the welding area. The gas passing through the furnace flows out from the other end of the branch pipes 4, enters the processing channel 6 through the outlet channel 5, and is purified by the cleaning structure in the processing channel 6. It then returns to the inlet of the blower 2 through the flange from the end of the processing channel 6 away from the outlet channel 5, completing one cycle. When the gas passes through the processing channel 6, the filter screen 21 can intercept larger particles of impurities, and the activated carbon plate 22 can adsorb harmful gases and flux volatiles in the gas, further purifying the gas. Through this filtration and adsorption method, the purity of the gas is improved, providing a higher quality anti-oxidation protective gas for reflow soldering. The fixing block 10 is fixed to the top of the processing channel 6, and the fixing bolt 14 is threadedly connected to the threaded groove 11. The mounting plate 12 is inserted into the through groove 13. The mounting plate 12 can be fixed by rotating the rotating disc 15 to drive the fixing bolt 14 to rotate. This facilitates the regular maintenance and replacement of components such as the propeller agitator 17 and cleaning brush 18 by the staff. The rotating shaft 16 connected to the mounting plate 12 is connected to the propeller agitator 17 at one end and the cleaning brush 18 at the other end. When the gas passes through the treatment channel 6, the propeller agitator 17 rotates under the action of the airflow, which in turn drives the rotating shaft 16 and the cleaning brush 18 to rotate. This causes the cleaning brush 18 to clean the filter screen 21. The cleaning brush 18 can brush off the impurities and particles on the filter screen 21, preventing the accumulation of impurities on the filter screen 21 from affecting the filtration effect and extending the service life of the filter screen 21. It also ensures the smooth flow of gas. The dust discharge groove 7 opened at the bottom of the treatment channel 6 is located directly below the cleaning brush 18. The impurities and particles brushed off by the cleaning brush 18 will fall into the dust discharge groove 7 and be collected through the conical tube 8 and the collection tube 9 for easy cleaning, keeping the inside of the treatment channel 6 clean and ensuring the effect of gas treatment. Example 2

[0030] Reference Figure 1-5This embodiment is based on the previous embodiment, but differs in that the installation structure includes a groove 19, an installation ring 20, a filter screen 21, an activated carbon plate 22, a guide rod 23, a slider 24, a snap-fit ​​block 25, a spring 26, a sliding groove 27, a pull ring 28, and a movable groove 29. Two sets of grooves 19 arranged in a ring array are provided on the inner side wall of the processing channel 6, and there are four grooves 19 in each set. An installation ring 20 is provided inside the processing channel 6 and at each of the two sets of grooves 19. A filter screen 21 is fixedly connected inside one installation ring 20, and an activated carbon plate 22 is fixedly connected inside the other installation ring 20.

[0031] Four movable grooves 29 are provided on the outer side walls of the two mounting rings 20. Two guide rods 23 are fixedly connected inside the movable grooves 29. A slider 24 is slidably connected to the guide rods 23. A spring 26 is provided inside the movable grooves 29. One end of the spring 26 is fixedly connected to the slider 24. A snap-fit ​​block 25 that matches the groove 19 is fixedly connected to the end of the slider 24 away from the spring 26.

[0032] The mounting ring 20 has a groove 27 at one end that is adapted to the slider 24, and a pull ring 28 is fixedly connected to one end of the slider 24 through the groove 27.

[0033] In this embodiment, when installing the filter screen 21 and activated carbon plate 22, several pull rings 28 are pushed inward to move the slider 24 and the locking block 25 inward to one end. Then, the mounting ring 20 is inserted into the processing channel 6 until the mounting ring 20 moves to the groove 19 corresponding to the filter screen 21 or activated carbon plate 22. The locking block 25 will pop out under the action of the spring 26 and lock into the groove 19 on the inner side wall of the processing channel 6, thus fixing the mounting ring 20. When it is necessary to replace the filter screen 21 or activated carbon plate 22, pull the pull rings 28 to make the slider 24 slide on the guide rod 23, compress the spring 26, and the locking block 25 disengages from the groove 19, so the mounting ring 20 can be taken out for replacement. The operation is convenient and quick.

[0034] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0035] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A gas circulation device for an anti-oxidation protection reflow oven, comprising an oven body (1), a processing channel (6), a cleaning structure, and an installation structure, characterized in that, A blower (2) is installed on the top of the furnace body (1), and an air inlet channel (3) is installed at the top of the furnace body (1). The air outlet of the blower (2) is connected to the air inlet channel (3). Several branch pipes (4) are installed inside the furnace body (1), and the branch pipes (4) are connected to the air inlet channel (3). One end of each branch pipe (4) passes through the furnace body (1) and is connected to an air outlet channel (5). The air outlet channel (5) is connected to a processing channel (6) through a flange. The processing channel (6) is equipped with a cleaning structure and an installation structure. The end of the processing channel (6) away from the air outlet channel (5) is connected to the air inlet of the blower (2) through a flange.

2. The gas circulation device for an anti-oxidation protection reflow oven according to claim 1, characterized in that, The cleaning structure includes a fixed block (10), a threaded groove (11), a mounting plate (12), a through groove (13), a fixing bolt (14), a turntable (15), a rotating shaft (16), a propeller-type agitator (17), and a cleaning brush (18). The top of the processing channel (6) is fixedly connected to the fixed block (10), and the fixed block (10) has two threaded grooves (11) inside. The threaded grooves (11) are threaded with fixing bolts (14), and one end of the fixing bolts (14) is fixedly connected to the turntable (15).

3. The gas circulation device for an anti-oxidation protection reflow oven according to claim 2, characterized in that, A mounting plate (12) is inserted into the fixing bolt (14), and two through slots (13) adapted to the fixing bolt (14) are provided on the mounting plate (12), and a rotating shaft (16) is rotatably connected to the mounting plate (12).

4. The gas circulation device for an anti-oxidation protection reflow oven according to claim 3, characterized in that, One end of the rotating shaft (16) is fixedly connected to a propeller-type agitator (17), and the other end of the rotating shaft (16) away from the propeller-type agitator (17) is fixedly connected to a cleaning brush (18).

5. The gas circulation device for an anti-oxidation protection reflow oven according to claim 1, characterized in that, The mounting structure includes a groove (19), a mounting ring (20), a filter screen (21), an activated carbon plate (22), a guide rod (23), a slider (24), a snap-fit ​​block (25), a spring (26), a slide groove (27), a pull ring (28), and a movable groove (29). The inner wall of the processing channel (6) is provided with two sets of grooves (19) arranged in a ring array, and the number of grooves (19) in one set is four. The processing channel (6) is provided with mounting rings (20) at both sets of grooves (19), and a filter screen (21) is fixedly connected inside one mounting ring (20), and an activated carbon plate (22) is fixedly connected inside the other mounting ring (20).

6. The gas circulation device for an anti-oxidation protection reflow oven according to claim 5, characterized in that, Four movable grooves (29) are provided on the outer side walls of the two mounting rings (20), and two guide rods (23) are fixedly connected inside the movable grooves (29). A slider (24) is slidably connected on the guide rods (23). A spring (26) is provided inside the movable grooves (29), and one end of the spring (26) is fixedly connected to the slider (24). A snap-fit ​​block (25) that matches the groove (19) is fixedly connected to the end of the slider (24) away from the spring (26).

7. The gas circulation device for an anti-oxidation protection reflow oven according to claim 5, characterized in that, The mounting ring (20) has a groove (27) at one end that is adapted to the slider (24), and a pull ring (28) is fixedly connected to one end of the slider (24) through the groove (27).

8. The gas circulation device for an anti-oxidation protection reflow oven according to claim 1, characterized in that, The bottom of the processing channel (6) is provided with a dust discharge groove (7), and the dust discharge groove (7) is located directly below the cleaning brush (18). A tapered tube (8) is fixedly connected to the bottom of the processing channel (6) and located at the dust discharge groove (7), and a collection tube (9) is connected to the tapered tube (8) through a flange.

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