Smoke removing mechanism of reflow oven

Abstract

The utility model discloses a smoke removal mechanism of a reflow oven, which belongs to the technical field of reflow ovens and comprises a reflow oven body, a plurality of support columns are fixedly connected to the top of the reflow oven body, a filter box is fixedly connected to the top ends of the support columns, and cleaning boxes are respectively arranged on two sides of the filter box. According to the utility model, the activated carbon filter screen in the filter tank is used for filtering particulate matters in smoke, the electric push rod can be used for driving the filter boxes to move, the used activated carbon filter screen is moved into the cleaning boxes, and the activated carbon filter screen in the other cleaning box is moved into the filter box for continuously filtering the smoke; and through a second exhaust fan, an air suction cover generates suction force to collect particulate matters filtered from the activated carbon filter screen into a dust removal cloth bag, so that the function of cleaning the used activated carbon filter screen is realized, and the practicability is good.

Description

Technical Field

[0001] The utility model relates to the technical field of reflow furnaces, and more specifically to a smoke removal mechanism of a reflow furnace. Background Art

[0002] A reflow soldering machine, also called a reflow soldering machine or a "reflow oven", provides a heating environment to melt the solder paste so that surface mount components and PCB pads are reliably bonded together through the solder paste alloy.

[0003] After searching, the utility model patent with announcement number CN212793473U discloses a reflow furnace which is convenient for removing smoke, including a reflow furnace base, a transverse block is fixedly connected between the left and right side walls of the reflow furnace base, a hydraulic telescopic push rod is fixedly connected to the bottom of the transverse block, a support seat is fixedly connected to the bottom of the hydraulic telescopic push rod, a moving wheel is fixedly connected to the bottom of the reflow furnace base, a top shell is fixedly connected to the top of the reflow furnace base, an exhaust fan is fixedly connected to the inner top wall of the top shell, and a filter box is fixedly connected to the inner top wall of the top shell; the reflow furnace which is convenient for removing smoke, through exhaust treatment, allows air containing smoke to enter the interior of the filter box, and under the filtering action of the activated carbon filter, effectively makes the particulate matter in the smoke be concentrated and adsorbed on the activated carbon filter, the user only needs to clean the activated carbon filter, and effectively makes the smoke of the reflow furnace easy to clean.

[0004] However, the above patents still have the following shortcomings: it is not convenient to automatically clean the activated carbon filter. When there are many particles in the smoke, it needs to be cleaned frequently by manpower, which is not convenient; and the exhaust smoke has a certain amount of heat, and direct exhaust will cause heat waste. For this reason, we propose a smoke removal mechanism for a reflow furnace. Utility Model Content

[0005] In view of the problems existing in the prior art, the utility model aims to provide a smoke removal mechanism for a reflow furnace.

[0006] In order to solve the above problems, the utility model adopts the following technical solutions:

[0007] A smoke removal mechanism for a reflow furnace comprises a reflow furnace body, a plurality of support columns are fixedly connected to the top of the reflow furnace body, a filter box is fixedly connected to the tops of the plurality of support columns, cleaning boxes are respectively arranged on both sides of the filter box, a heat recovery mechanism is arranged at the rear of the reflow furnace body, first exhaust fans are respectively fixedly installed at both ends of the filter box, smoke extraction pipes are respectively fixedly connected to the input ends of the two first exhaust fans, the ends of the smoke extraction pipes are fixedly sleeved into the reflow furnace body, a first electric control valve is fixedly installed on the bottom surface of the filter box, and the bottom end of the first electric control valve is fixedly sleeved In the reflow furnace body, the inner side surfaces of the cleaning boxes are provided with air inlet grooves, the outer side surfaces of the cleaning boxes are fixedly sleeved with air suction hoods, the outer side of the air suction hood is fixedly installed with a second exhaust fan, the input end of the second exhaust fan extends to the inner cavity of the air suction hood, the output end of the second exhaust fan is provided with a dust removal bag, the outer sides of the two cleaning boxes are respectively fixedly installed with electric push rods, the output ends of the two electric push rods respectively extend to the inner cavity of the cleaning box and are fixedly connected with filter boxes, the filter box is provided with two filter slots, and the inner cavities of the two filter slots are provided with activated carbon filters.

[0008] As a preferred solution of the utility model, the heat recovery mechanism includes a water tank fixedly connected to the back of the reflow furnace body, a smoke outlet pipe is fixedly sleeved on the top of the water tank, a second electrically-controlled valve is fixedly connected to the top of the smoke outlet pipe, the bottom end of the second electrically-controlled valve extends to the inner cavity of the filter box, the bottom end of the smoke outlet pipe extends to the inner cavity of the water tank and is fixedly connected to an upper heat exchange tube, a plurality of middle heat exchange tubes are fixedly connected to the bottom surface of the upper heat exchange tube, a plurality of middle heat exchange tubes are fixedly connected to the bottom ends of the lower heat exchange tubes, a smoke exhaust pipe is fixedly connected to the bottom surface of the lower heat exchange tube, and the bottom end of the smoke exhaust pipe extends to the bottom of the water tank.

[0009] As a preferred solution of the utility model, the dust bag sleeve is arranged on the outside of the output end of the second exhaust fan, and the outer sleeve of the end of the dust bag is provided with two mounting sleeves, and mounting seats are respectively provided at both ends of the two mounting sleeves, and bolts are threadedly installed on the mounting seats.

[0010] As a preferred solution of the utility model, the two sides of the inner cavity of the filter tank are respectively flush with the two sides of the inner cavity of the filter box, and the top surface and the bottom surface of the filter box are respectively in contact with the top surface and the bottom surface of the inner cavity of the filter box.

[0011] As a preferred solution of the utility model, a screw plug is threadedly installed on the top surface of the water tank, a drain valve is fixedly installed on the bottom of the water tank, and the top end of the drain valve extends to the inner cavity of the water tank.

[0012] As a preferred solution of the utility model, the output end of the first exhaust fan extends to the inner cavity of the filter box.

[0013] Compared with the prior art, the advantages of the present invention are:

[0014] (1) In the utility model, the activated carbon filter in the filter tank is used to filter the particulate matter in the smoke. In addition, the electric push rod can be used to drive the filter box to move, so that the used activated carbon filter is moved to the cleaning box, and the activated carbon filter in another cleaning box is moved to the filter box to continue filtering the smoke. The second exhaust fan is used to make the suction hood generate suction to collect the particulate matter filtered out by the activated carbon filter into the dust bag, thereby realizing the function of cleaning the used activated carbon filter, which is convenient and practical.

[0015] (2) In the utility model, when the reflow furnace stops running, the smoke filtered in the filter box enters the upper heat exchange tube from the smoke outlet pipe, and the smoke flows in the upper heat exchange tube, the middle heat exchange tube and the lower heat exchange tube. The high-temperature smoke in the upper heat exchange tube, the middle heat exchange tube and the lower heat exchange tube exchange heat with the water in the water tank, thereby heating the water in the water tank, realizing temperature recovery in the smoke, and improving the working quality of the smoke removal mechanism of the reflow furnace. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the structure of the filter box of the utility model;

[0018] Figure 3 It is a cross-sectional schematic diagram of the filter box of the utility model;

[0019] Figure 4 This is a schematic diagram of the structure of the air suction hood of the utility model;

[0020] Figure 5 This is a schematic diagram of the structure of the filter box of the utility model;

[0021] Figure 6 It is a cross-sectional schematic diagram of the water tank of the utility model.

[0022] Description of the numbers in the figure:

[0023] 1. Reflux furnace body; 2. Support column; 3. Filter box; 4. Cleaning box; 5. Suction hood; 6. Second exhaust fan; 7. Dust bag; 8. Heat recovery mechanism; 9. First exhaust fan; 10. Smoke exhaust pipe; 11. First electric control valve; 12. Electric push rod; 13. Filter box; 14. Filter tank; 15. Activated carbon filter; 16. Air inlet tank; 17. Second electric control valve; 18. Smoke exhaust pipe; 19. Water tank; 20. Upper heat exchange tube; 21. Middle heat exchange tube; 22. Lower heat exchange tube; 23. Smoke exhaust pipe; 24. Screw plug; 25. Drain valve; 26. Mounting sleeve; 27. Mounting seat; 28. Bolt. DETAILED DESCRIPTION

[0024] The following will clearly and completely describe the technical solutions in the embodiments of the utility model in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0026] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "set / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0027] Example:

[0028] See also Figure 1-6A smoke removal mechanism for a reflow furnace comprises a reflow furnace body 1, a plurality of support columns 2 are fixedly connected to the top of the reflow furnace body 1, a filter box 3 is fixedly connected to the top of the plurality of support columns 2, cleaning boxes 4 are respectively arranged on both sides of the filter box 3, a heat recovery mechanism 8 is arranged at the rear of the reflow furnace body 1, first exhaust fans 9 are respectively fixedly installed at both ends of the filter box 3, smoke extraction pipes 10 are respectively fixedly connected to the input ends of the two first exhaust fans 9, and the ends of the smoke extraction pipes 10 are fixedly sleeved into the reflow furnace body 1, a first electric control valve 11 is fixedly installed on the bottom surface of the filter box 3, and the bottom end of the first electric control valve 11 is fixedly sleeved to the reflow furnace body 1. In the flow furnace body 1, the inner side surface of the cleaning box 4 is provided with an air inlet groove 16, the outer side surface of the cleaning box 4 is fixedly sleeved with an air suction hood 5, the outer side of the air suction hood 5 is fixedly installed with a second exhaust fan 6, the input end of the second exhaust fan 6 extends to the inner cavity of the air suction hood 5, and the output end of the second exhaust fan 6 is provided with a dust removal bag 7, and the outer sides of the two cleaning boxes 4 are respectively fixedly installed with electric push rods 12, and the output ends of the two electric push rods 12 extend to the inner cavity of the cleaning box 4 and are fixedly connected with a filter box 13, and the filter box 13 is provided with two filter slots 14, and the inner cavities of the two filter slots 14 are both provided with activated carbon filters 15.

[0029] In this embodiment, the top end of the first electrically controlled valve 11 extends to the inner cavity of the filter box 3 so that the high-temperature flue gas filtered in the filter box 3 can be guided back to the reflow furnace body 1 through the first electrically controlled valve 11 to continue heating the circuit board in the reflow furnace.

[0030] For details, please refer to Figure 1 and Figure 6 The heat recovery mechanism 8 includes a water tank 19 fixedly connected to the back of the reflow furnace body 1, a smoke outlet pipe 18 is fixedly sleeved on the top of the water tank 19, a second electric-controlled valve 17 is fixedly connected to the top of the smoke outlet pipe 18, the bottom end of the second electric-controlled valve 17 extends to the inner cavity of the filter box 3, the bottom end of the smoke outlet pipe 18 extends to the inner cavity of the water tank 19 and is fixedly connected to an upper heat exchange tube 20, a plurality of middle heat exchange tubes 21 are fixedly connected to the bottom surface of the upper heat exchange tube 20, a plurality of middle heat exchange tubes 21 are fixedly connected to the bottom ends of the lower heat exchange tubes 22, a smoke exhaust pipe 23 is fixedly connected to the bottom surface of the lower heat exchange tube 22, and the bottom end of the smoke exhaust pipe 23 extends to the bottom of the water tank 19.

[0031] In this embodiment, the high-temperature smoke introduced through the upper heat exchange tube 20, the middle heat exchange tube 21 and the lower heat exchange tube 22 exchanges heat with the water in the water tank 19, thereby heating the water in the water tank 19 and further recycling the heat in the smoke.

[0032] For details, please refer to Figure 4 The dust bag 7 is sleeved on the outer side of the output end of the second exhaust fan 6, and two mounting sleeves 26 are sleeved on the outer side of the end of the dust bag 7. Mounting seats 27 are respectively provided at both ends of the two mounting sleeves 26, and bolts 28 are threadedly installed on the mounting seats 27.

[0033] In this embodiment, the dust bag 7 is installed on the output end of the second exhaust fan 6 by the cooperation of the installation sleeve 26, the installation seat 27 and the bolt 28, and the dust bag 7 can be replaced at the same time.

[0034] For details, please refer to Figure 3 and Figure 5 The two sides of the inner cavity of the filter tank 14 are flush with the two sides of the inner cavity of the filter box 3, and the top surface and the bottom surface of the filter box 13 are respectively in contact with the top surface and the bottom surface of the inner cavity of the filter box 3.

[0035] In this embodiment, it is ensured that the smoke passing through the inner cavity of the filter box 3 can be filtered by the activated carbon filter 15, so as to filter out the particulate matter in the smoke.

[0036] For details, please refer to Figure 6 A screw plug 24 is threadedly installed on the top surface of the water tank 19 , and a drain valve 25 is fixedly installed on the bottom of the water tank 19 , and the top end of the drain valve 25 extends to the inner cavity of the water tank 19 .

[0037] In this embodiment, water is added into the water tank 19 by removing the screw plug 24 , and the hot water in the water tank 19 is discharged by using the drain valve 25 .

[0038] For details, please refer to Figure 3 The output end of the first exhaust fan 9 extends to the inner cavity of the filter box 3.

[0039] In this embodiment, it is ensured that the smoke extracted from the reflow furnace body 1 by the first exhaust fan 9 can smoothly enter the filter box 3 .

[0040] Working principle: when in use, first start the first exhaust fan 9 to extract the smoke in the reflow furnace body 1 from the reflow furnace body 1, so that the smoke enters the filter box 3, and in addition, the particulate matter in the smoke is filtered through the activated carbon filter 15 in the filter tank 14, and the odor can be adsorbed at the same time, and then the high-temperature smoke after adsorption is guided back to the reflow furnace body 1 from the first electric control valve 11, so as to continue to heat the circuit board in the reflow furnace body 1, and then the electric push rod 12 is started at a fixed time to drive the filter box 13 to move, so that the activated carbon filter 15 aligned with the inner cavity of the filter box 3 moves to a cleaning box 4, and the activated carbon filter 15 in the other cleaning box 4 moves to the filter box 3 to continue filtering the smoke, and at this time, the second exhaust fan 6 on the side corresponding to the activated carbon filter 15 is started, and the second exhaust fan 6 is used to make the suction hood 5 produce Suction is generated, and external air enters the filter tank 14 from the air inlet slot 16, thereby blowing the activated carbon filter 15 in the opposite direction, so that the particulate matter filtered out of the activated carbon filter 15 moves to the dust bag 7, and the dust bag 7 is used to collect the particulate matter, thereby cleaning the activated carbon filter 15. Finally, when the reflux furnace body 1 stops running, the first electric control valve 11 is closed and the second electric control valve 17 is opened, so that the smoke filtered in the filter box 3 enters the upper heat exchange tube 20 from the smoke outlet pipe 18, and the smoke flows from the upper heat exchange tube 20, the middle heat exchange tube 21 and the lower heat exchange tube 22, and the high-temperature smoke in the upper heat exchange tube 20, the middle heat exchange tube 21 and the lower heat exchange tube 22 is heat-exchanged with the water in the water tank 19, thereby heating the water in the water tank 19, and realizing the temperature recovery of the smoke.

[0041] The above is only a preferred specific implementation method of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can make equivalent substitutions or changes within the technical scope disclosed by the utility model according to the technical solution and improved ideas of the utility model, which should be included in the protection scope of the utility model.

Claims

1. A fume removal mechanism for a reflow furnace, comprising a reflow furnace body (1), characterized in that: The top of the reflow furnace body (1) is fixedly connected to a plurality of support columns (2), the top ends of the plurality of support columns (2) are fixedly connected to a filter box (3), both sides of the filter box (3) are respectively provided with a cleaning box (4), the rear part of the reflow furnace body (1) is provided with a heat recovery mechanism (8), the two ends of the filter box (3) are respectively fixedly installed with a first exhaust fan (9), the input ends of the two first exhaust fans (9) are respectively fixedly connected to a smoke extraction pipe (10), the end of the smoke extraction pipe (10) is fixedly sleeved in the reflow furnace body (1), the bottom surface of the filter box (3) is fixedly installed with a first electric control valve (11), the bottom end of the first electric control valve (11) is fixedly sleeved in the reflow furnace body (1), the cleaning box ( The inner side of each cleaning box (4) is provided with an air inlet groove (16), the outer side of each cleaning box (4) is fixedly sleeved with an air suction hood (5), the outer side of each cleaning box (4) is fixedly mounted with a second exhaust fan (6), the input end of the second exhaust fan (6) extends to the inner cavity of the air suction hood (5), the output end of the second exhaust fan (6) is provided with a dust removal bag (7), the outer sides of the two cleaning boxes (4) are respectively fixedly mounted with electric push rods (12), the output ends of the two electric push rods (12) respectively extend to the inner cavity of the cleaning box (4) and are fixedly connected with a filter box (13), the filter box (13) is provided with two filter slots (14), and the inner cavities of the two filter slots (14) are both provided with activated carbon filters (15).

2. The smoke removal mechanism of a reflow furnace according to claim 1, characterized in that: The heat recovery mechanism (8) comprises a water tank (19) fixedly connected to the back side of the reflow furnace body (1); a smoke outlet pipe (18) is fixedly sleeved on the top of the water tank (19); a second electric control valve (17) is fixedly connected to the top of the smoke outlet pipe (18); the bottom end of the second electric control valve (17) extends to the inner cavity of the filter box (3); the bottom end of the smoke outlet pipe (18) extends to the inner cavity of the water tank (19) and is fixedly connected to an upper heat exchange tube (20); a plurality of middle heat exchange tubes (21) are fixedly connected to the bottom surface of the upper heat exchange tube (20); a plurality of middle heat exchange tubes (21) are fixedly connected to the bottom ends of the lower heat exchange tubes (22); a smoke exhaust pipe (23) is fixedly connected to the bottom surface of the lower heat exchange tube (22); the bottom end of the smoke exhaust pipe (23) extends to the bottom of the water tank (19).

3. The smoke removal mechanism of a reflow furnace according to claim 1, characterized in that: The dust removal bag (7) is sleeved on the outside of the output end of the second exhaust fan (6), and two mounting sleeves (26) are sleeved on the outside of the end of the dust removal bag (7). Mounting seats (27) are respectively provided at both ends of the two mounting sleeves (26), and bolts (28) are threadedly installed on the mounting seats (27).

4. The smoke removal mechanism of a reflow furnace according to claim 1, characterized in that: The two sides of the inner cavity of the filter tank (14) are respectively flush with the two sides of the inner cavity of the filter box (3), and the top surface and the bottom surface of the filter box (13) are respectively in contact with the top surface and the bottom surface of the inner cavity of the filter box (3).

5. The smoke removal mechanism of a reflow furnace according to claim 2, characterized in that: A screw plug (24) is threadedly mounted on the top surface of the water tank (19), and a drain valve (25) is fixedly mounted on the bottom of the water tank (19), wherein the top end of the drain valve (25) extends to the inner cavity of the water tank (19).

6. The smoke removal mechanism of a reflow furnace according to claim 1, characterized in that: The output end of the first exhaust fan (9) extends to the inner cavity of the filter box (3).

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