Vacuum reflow soldering equipment with hot air circulation function

Abstract

The invention discloses vacuum reflow soldering equipment with a hot air circulation function. The vacuum reflow soldering equipment with the hot air circulation function comprises a vacuum reflow soldering machine and an anti-blocking unit, the hot air circulation device has the hot air circulation function, the heating uniformity of workpieces in a vacuum reflow soldering machine furnace can be ensured through hot air circulation, the anti-blocking unit is introduced in the hot air circulation function, impurities and dust in hot air can be filtered through the anti-blocking unit during hot air circulation, and therefore pipeline blocking is avoided; meanwhile, through the combined action of the anti-blocking unit and the pneumatic component, an annular filter screen in the anti-blocking unit can be automatically rotated during hot air circulation, so that the problem of filter screen blocking is solved, the maintenance component is further introduced, the anti-blocking unit can be cooled and cleaned through the maintenance component, and the service life of the anti-blocking unit is prolonged. Therefore, the filtering effect of the anti-blocking unit is effectively guaranteed, and the service life is prolonged.

Description

Technical Field

[0001] The present application relates to the field of vacuum welding, in particular to vacuum reflow soldering equipment with hot air circulation function. Background Art

[0002] A vacuum welding furnace is a device that performs welding in a vacuum environment. It uses a vacuum system (including a vacuum pump, a vacuum measuring device, a vacuum valve, etc.) to exhaust the air in the furnace, making the pressure in the furnace less than a standard atmospheric pressure, thereby performing welding in a vacuum state. This equipment is mainly used to improve welding quality and efficiency, especially in the fields of aerospace, electronics, etc., which have extremely high requirements for welding quality.

[0003] The existing patent document "CN216802017U A hot air online vacuum welding furnace" discloses a vacuum welding furnace. The vacuum welding furnace is provided with a hot air component, which performs hot air circulation heating through the hot air component. However, when the hot air component is working, since the vacuum welding furnace works inside, the raw materials and solder used in the welding process may contain certain impurities. These impurities may volatilize or sublimate at high temperatures to form dust. These dusts may include metal oxides, non-metallic oxides, carbides and other problems. Therefore, during the hot air circulation process, the impurity dust is prone to block the hot air component. At the same time, when filtering through an ordinary filter, long-term use is also prone to block the filter. In addition, the high temperature causes the impurity particles to become more tightly attached to the filter due to thermal expansion, making it difficult to remove.

[0004] That is, the prior art has the following technical problem: the hot air assembly of the common vacuum soldering furnace is easily blocked by impurities and dust during the hot air circulation process. Therefore, a vacuum reflow soldering device with hot air circulation function is proposed to solve the above problem. Summary of the invention

[0005] In this embodiment, a vacuum reflow soldering device with a hot air circulation function is provided to solve the problem that the hot air component of a common vacuum soldering furnace in the prior art is easily blocked by impurities and dust during the hot air circulation process.

[0006] According to one aspect of the present application, a vacuum reflow soldering device with a hot air circulation function is provided, and the vacuum reflow soldering device with a hot air circulation function comprises:

[0007] A vacuum reflow soldering machine, wherein a circulating fan is fixedly installed on the upper surface of the vacuum reflow soldering machine, a circulating air duct is connected to the circulating fan, a heater is installed on the circulating air duct, and the heater can heat the circulating air;

[0008] An anti-blocking unit, which is fixedly arranged on the circulating air duct and can filter the circulating air to prevent blocking;

[0009] A pneumatic component, the pneumatic component is fixedly arranged on the circulating air duct, the pneumatic component is connected to the anti-blocking unit, and the pneumatic component can automatically move when circulating hot air;

[0010] A maintenance component is fixedly arranged at the anti-blocking unit, and the maintenance component can automatically clean and cool the anti-blocking unit.

[0011] Furthermore, the circulating air duct includes a first input pipe, a second input pipe and a first output pipe, one end of the first input pipe is fixedly connected to the input end of the circulating fan, the other end of the first input pipe is connected to the anti-blocking unit, one end of the anti-blocking unit is connected to the second input pipe, the second input pipe is connected to the inner cavity of the vacuum reflow soldering machine, a pneumatic component is installed on the first input pipe, the output end of the circulating fan is fixedly connected to the first output pipe, one end of the first output pipe extends into the inner cavity of the vacuum reflow soldering machine, and a heater is installed on the first output pipe. Through the present technical solution, hot air circulation can be performed.

[0012] Furthermore, the anti-blocking unit includes a circular shell, a rotating shaft, a disc and an annular filter screen, the circular shell is fixedly arranged between the first input pipe and the second input pipe, the rotating shaft is rotatably connected in the inner cavity of the circular shell, a disc is fixedly arranged at the arc-shaped wall of the rotating shaft, an annular opening is arranged on the disc, and an annular filter screen is fixedly arranged at the annular opening of the disc. Through the technical solution, by setting the annular filter screen, the gas can be filtered during the flow of the circulating air duct.

[0013] Furthermore, the pneumatic component includes a connecting shell, a rotating shaft, a wind wheel and a linkage part. The connecting shell is fixedly arranged at the first input pipe and is connected to the first input pipe. The rotating shaft is rotatably connected in the inner cavity of the connecting shell. The linkage part is arranged between the connecting shell and the anti-blocking unit.

[0014] Furthermore, a wind wheel is fixedly provided on the arc-shaped wall of the rotating shaft. Through this technical solution, the pneumatic component can be automatically moved when the hot air circulates.

[0015] Furthermore, the linkage part includes a first rotating disk, a support frame, a second rotating disk, a fourth rotating disk, a third rotating disk, a bevel gear A, a bevel gear B and a rotating rod, one end of the rotating shaft extends to the outer wall of the connecting shell, the first rotating disk is fixedly arranged at one end of the rotating shaft, the support frame is fixedly arranged at the outer wall of the anti-blocking unit, the support frame is rotatably connected with a rotating rod, one end of the rotating rod is fixedly connected with the second rotating disk, a belt is sleeved and connected between the second rotating disk and the first rotating disk, the other end of the rotating rod is fixedly connected with the fourth rotating disk, the support frame is rotatably connected with a rotating rod, one end of the rotating rod is fixedly connected with the third rotating disk, a connecting belt B is sleeved and connected between the third rotating disk and the fourth rotating disk. Through the technical solution, the linkage part can automatically move when the hot air circulates.

[0016] Furthermore, a bevel gear A is fixedly provided at one end of the rotating rod, and the bevel gear B is fixedly provided at one end of the rotating shaft. The bevel gear B and the bevel gear A are meshed with each other. Through this technical solution, when the hot air circulates, the annular filter net is automatically driven to rotate.

[0017] Furthermore, the maintenance component includes a cooling part and a cleaning part, the cooling part includes a fixed sleeve and a fan, one end of the fixed sleeve is fixedly arranged on the side wall of the circular shell and is interconnected with the inner cavity of the circular shell, and the fan is fixedly installed on the other end of the fixed sleeve.

[0018] Furthermore, the cleaning part includes a fixed bracket, a connecting rod, a rotating fan, a fixed plate frame, a cleaning brush and an ash discharge port, wherein the fixed bracket is fixedly arranged in the inner cavity of the fixed sleeve, the connecting rod is rotatably connected to the fixed bracket, the rotating fan is fixedly arranged at the right end of the connecting rod, the fixed plate frame is fixedly arranged at the left end of the connecting rod, and the cleaning brush is fixedly arranged on the fixed plate frame. Through this technical solution, the particles attached to the annular filter screen can be cleaned by rotating the cleaning brush.

[0019] Furthermore, the cleaning brush is made of nylon bristles, one end of the cleaning brush extends to the annular filter and contacts the annular filter, the ash discharge port is arranged at the other side wall of the circular shell, and the ash discharge port is in the same straight line as the fixed sleeve.

[0020] Through the above-mentioned embodiments of the present application, the uniformity of heating of the workpiece in the vacuum reflow soldering machine furnace can be ensured through hot air circulation. At the same time, in the function of hot air circulation, the present application introduces an anti-blocking unit. The anti-blocking unit can filter the impurities and dust inside the hot air during the hot air circulation, thereby avoiding clogging of the pipeline. At the same time, the anti-blocking unit and the pneumatic component work together to automatically rotate the internal annular filter of the anti-blocking unit during the hot air circulation, thereby avoiding the problem of clogging of the filter. Furthermore, the present application introduces a maintenance component. The maintenance component can be used to cool and clean the anti-blocking unit, thereby effectively ensuring the filtering effect of the anti-blocking unit, improving its service life, and avoiding the phenomenon of rapid aging caused by long-term hot air heating and the problem of impurities being easily tightly adhered, difficult to clean and blocked due to thermal expansion. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0022] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present application;

[0023] Figure 2 This is a schematic diagram of the overall connection structure of the circulating air duct in one embodiment of the present application;

[0024] Figure 3 This is a schematic diagram of the overall structure of an anti-blocking unit according to an embodiment of the present application;

[0025] Figure 4 This is a schematic structural diagram of an annular filter screen according to an embodiment of the present application;

[0026] Figure 5 A schematic cross-sectional view of a pneumatic component according to an embodiment of the present application;

[0027] Figure 6 This is a schematic diagram of the overall connection of the pneumatic components of an embodiment of the present application;

[0028] Figure 7 For an embodiment of the present application Figure 6 A local enlarged structural schematic diagram;

[0029] Figure 8 This is a schematic diagram of the structure of a maintenance component according to an embodiment of the present application;

[0030] Fig. 9This is an internal schematic diagram of a maintenance component according to an embodiment of the present application;

[0031] Fig.10 A schematic diagram of the connection of a cleaning unit according to an embodiment of the present application;

[0032] Fig.11 This is a connection diagram of an ash discharge port according to an embodiment of the present application.

[0033] In the figure:

[0034] Vacuum reflow soldering machine 1;

[0035] Circulating air duct 2, first input pipe 201, second input pipe 202, first output pipe 203;

[0036] Circulation fan 3, heater 4;

[0037] Anti-blocking unit 5, circular housing 501, rotating shaft 502, disc 503, annular filter 504;

[0038] Pneumatic component 6, connecting shell 601, rotating shaft 602, wind wheel 603, first rotating disk 604, second rotating disk 605, connecting belt A606, rotating rod 607, third rotating disk 608, connecting belt B609, bevel gear A610, bevel gear B611, rotating rod 612, fourth rotating disk 613, supporting frame 614;

[0039] Maintenance component 7, fixed sleeve 701, fan 702, connecting rod 703, rotating fan 704, fixed plate frame 705, cleaning brush 706, fixed bracket 707, ash discharge port 708. DETAILED DESCRIPTION

[0040] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0041] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present application described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0042] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0043] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to specific circumstances.

[0044] In addition, the terms "installed", "set", "provided with", "connected", "connected", and "socketed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0045] See also Figure 1 As shown, a vacuum reflow soldering device with hot air circulation function, the vacuum reflow soldering device with hot air circulation function comprises:

[0046] A vacuum reflow soldering machine 1, wherein a circulating fan 3 is fixedly installed on the upper surface of the vacuum reflow soldering machine 1, a circulating air duct 2 is connected to the circulating fan 3, a heater 4 is installed at the circulating air duct 2, and the heater 4 can heat the circulating air;

[0047] An anti-blocking unit 5, which is fixedly arranged on the circulating air duct 2, and can filter and prevent the circulating air from being blocked;

[0048] A pneumatic component 6, wherein the pneumatic component 6 is fixedly disposed on the circulating air duct 2, the pneumatic component 6 is connected to the anti-blocking unit 5, and the pneumatic component 6 can automatically move when circulating hot air;

[0049] The maintenance component 7 is fixedly arranged at the anti-blocking unit 5 , and the maintenance component 7 can automatically clean and cool the anti-blocking unit 5 .

[0050] Through the above technical scheme, the uniformity of heating of the workpiece in the furnace of the vacuum reflow soldering machine 1 can be ensured through hot air circulation. At the same time, in the function of hot air circulation, the present application introduces an anti-blocking unit 5. The anti-blocking unit 5 can filter the impurities and dust inside the hot air during the hot air circulation, thereby avoiding clogging of the pipeline. At the same time, the joint action of the anti-blocking unit 5 and the pneumatic component 6 can automatically rotate the internal annular filter 504 of the anti-blocking unit 5 during the hot air circulation, thereby avoiding the problem of filter clogging. Further, the present application introduces a maintenance component 7. The maintenance component 7 can be used to cool and clean the anti-blocking unit 5, thereby effectively ensuring the filtering effect of the anti-blocking unit 5, improving the service life, and avoiding the phenomenon of rapid aging caused by long-term hot air heating and the problem of impurities being easily tightly adhered and difficult to clean and clogged due to thermal expansion.

[0051] For further technical solutions, see Figure 2 As shown, the circulating air duct 2 includes a first input pipe 201, a second input pipe 202 and a first output pipe 203, one end of the first input pipe 201 is fixedly connected to the input end of the circulating fan 3, the other end of the first input pipe 201 is connected to the anti-blocking unit 5, one end of the anti-blocking unit 5 is connected to the second input pipe 202, the second input pipe 202 is connected to the inner cavity of the vacuum reflow soldering machine 1, the first input pipe 201 is installed with a pneumatic component 6, the output end of the circulating fan 3 is fixedly connected to the first output pipe 203, one end of the first output pipe 203 extends into the inner cavity of the vacuum reflow soldering machine 1, and the first output pipe 203 is installed with a heater 4. Through this technical solution, hot air circulation can be carried out. Through the operation of the circulating fan 3, gas circulation can be carried out in the inner cavity of the vacuum reflow soldering machine 1, so that the circulating gas can be heated by the setting of the heater 4, realizing the function of hot air circulation.

[0052] As a preferred technical solution, please refer to Figure 3 and Figure 4As shown, the anti-blocking unit 5 includes a circular shell 501, a rotating shaft 502, a disc 503 and an annular filter 504. The circular shell 501 is fixedly arranged between the first input pipe 201 and the second input pipe 202. The rotating shaft 502 is rotatably connected in the inner cavity of the circular shell 501. The circular disk 503 is fixedly arranged at the arc wall of the rotating shaft 502. The circular disk 503 is provided with an annular opening. The annular filter 504 is fixedly arranged at the annular opening of the circular disk 503. Through the technical solution, the annular filter 504 can be set to filter the gas during the flow of the circulating air duct 2. When the gas flows on the circulating air duct 2, the gas will pass through the annular filter 504, so that the dust and foreign matter inside the gas can be filtered through the setting of the annular filter 504, thereby avoiding the problem of impurity particles in the furnace accompanying the circulation of hot air and causing pipeline blockage.

[0053] For specific technical solutions, please refer to Figure 5 As shown, the pneumatic component 6 includes a connecting shell 601, a rotating shaft 602, a wind wheel 603 and a linkage part. The connecting shell 601 is fixedly arranged at the first input pipe 201 and is connected to the first input pipe 201. The rotating shaft 602 is rotatably connected in the inner cavity of the connecting shell 601, and the linkage part is arranged between the connecting shell 601 and the anti-blocking unit 5; the wind wheel 603 is fixedly arranged at the arc-shaped wall of the rotating shaft 602. Through the technical solution, the pneumatic component 6 can be automatically moved during hot air circulation. When the hot air gas flows through the inner cavity of the connecting shell 601, the flow of gas can drive the wind wheel 603 to rotate, thereby driving the rotating shaft 602 to rotate through the rotation of the wind wheel 603.

[0054] For further technical solutions, see Figure 6 and Figure 7As shown, the linkage part includes a first rotating disk 604, a support frame 614, a second rotating disk 605, a fourth rotating disk 613, a third rotating disk 608, a bevel gear A610, a bevel gear B611 and a rotating rod 607. One end of the rotating shaft 602 extends to the outer wall of the connecting shell 601. The first rotating disk 604 is fixedly arranged at one end of the rotating shaft 602. The support frame 614 is fixedly arranged at the outer wall of the anti-blocking unit 5. The supporting frame 614 is rotatably connected to the rotating rod 612. The rotating rod 612 A second rotating disk 605 is fixedly connected at one end, a belt is sleeved and connected between the second rotating disk 605 and the first rotating disk 604, a fourth rotating disk 613 is fixedly connected at the other end of the rotating rod 612, a rotating rod 607 is rotatably connected to the supporting frame 614, a third rotating disk 608 is fixedly provided at one end of the rotating rod 607, a connecting belt B609 is sleeved and connected between the third rotating disk 608 and the fourth rotating disk 613. Through this technical solution, the linkage part can be automatically moved when the hot air circulates.When the rotating shaft 602 rotates, the first rotating disk 604 can be driven to rotate by the rotation of the rotating shaft 602, thereby driving the connecting belt A606 to move, and then driving the second rotating disk 605 to rotate. The rotation of the second rotating disk 605 can drive the rotating rod 612 to rotate, and then drive the fourth rotating disk 613 to rotate, thereby further driving the connecting belt B609 to move, and then driving the third rotating disk 608 to rotate, thereby driving the rotating rod 607 to rotate. Through the above-mentioned technical solution, during the hot air circulation process, the rotating rod 607 is automatically rotated; a bevel gear A610 is fixedly provided at one end of the rotating rod 607, and the bevel gear B611 is fixedly provided at one end of the rotating shaft 502, and the bevel gear B611 and the bevel gear A610 are meshed with each other. Through this technical solution, when the hot air circulates, the annular filter screen 504 is automatically driven to rotate. When the rotating rod 60 When the rotating shaft 502 is rotated, the rotating rod 607 can drive the bevel gear A610 to rotate, thereby driving the bevel gear B611 to rotate, and further driving the rotating shaft 502 to rotate, so that the rotation of the rotating shaft 502 can drive the disc 503 to rotate, and then the rotation of the disc 503 drives the annular filter 504 to rotate, so that the annular filter 504 automatically rotates and keeps rotating during the hot air circulation process. Through the continuous rotation of the annular filter 504, the various positions of the annular filter 504 can be alternately filtered, thereby avoiding the filter at a single position from continuously filtering the hot air, thereby avoiding the clogging phenomenon that is easy to occur due to long-term filtering at a single position, and at the same time avoiding the overheating problem caused by long-term contact with hot air at a single position. Compared with the ordinary filter in the prior art, the filter clogging phenomenon and overheating of the filter are greatly reduced, making it more suitable for use in the hot air circulation of the vacuum reflow soldering machine 1.

[0055] For specific technical solutions, please refer to Figure 8As shown, the maintenance component 7 includes a cooling part and a cleaning part. The cooling part includes a fixed sleeve 701 and a fan 702. One end of the fixed sleeve 701 is fixedly arranged on the side wall of the circular shell 501 and is interconnected with the inner cavity of the circular shell 501. The fan 702 is fixedly installed at the other end of the fixed sleeve 701. Through this technical solution, the annular filter 504 can be cooled by blowing air. When the annular filter 504 rotates, the operation of the fan 702 can make the cold air pass through the fixed sleeve 701 and blow to the annular filter. At 504, the heated annular filter 504 is cooled by blowing air, which can effectively avoid the overheating problem caused by the annular filter 504 filtering hot air for a long time, reduce the accelerated aging and deformation caused by high temperature, and at the same time cool the high-temperature foreign particles attached to the annular filter 504. After cooling, the impurity particles become more brittle and hard, and the adhesion between the impurity particles and the filter is weakened due to thermal shrinkage, which is convenient for subsequent more thorough cleaning. It is particularly suitable for use in hot air circulation of vacuum reflow furnaces.

[0056] As a preferred technical solution, please refer to Fig. 9 , Fig.10 and Fig.11 As shown, the cleaning part includes a fixed bracket 707, a connecting rod 703, a rotating fan 704, a fixed plate frame 705, a cleaning brush 706 and an ash discharge port 708. The fixed bracket 707 is fixedly arranged in the inner cavity of the fixed sleeve 701. The connecting rod 703 is rotatably connected to the fixed bracket 707. The rotating fan 704 is fixedly arranged at the right end of the connecting rod 703. The fixed plate frame 705 is fixedly arranged at the left end of the connecting rod 703. The cleaning brush 706 is fixedly arranged on the fixed plate frame 705. Through this technical solution, the particles attached to the annular filter 504 can be cleaned by the rotation of the cleaning brush 706. When the fan 702 blows air to cool the annular filter 504, the blowing of the cold air can drive the rotating fan 704 to rotate, so that the rotation of the rotating fan 704 can drive the connecting rod 703 to rotate, thereby driving the fixed plate frame 705 to rotate, and then driving the cleaning brush 706 to rotate, so that the annular filter 504 can be cleaned by the rotation of the cleaning brush 706;

[0057] The cleaning brush 706 is made of nylon bristles, one end of which extends to the annular filter 504 and contacts the annular filter 504. The ash discharge port 708 is arranged on the other side wall of the circular shell 501. The ash discharge port 708 is in the same straight line as the fixed sleeve 701. Through the technical solution, the ash discharge port 708 is arranged, and the fallen impurities and foreign particles are cleaned and discharged through the ash discharge port 708 along with cold air.

[0058] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. Vacuum reflow soldering equipment with hot air circulation function, characterized by: The vacuum reflow soldering equipment with hot air circulation function comprises: A vacuum reflow soldering machine, wherein a circulating fan is fixedly installed on the upper surface of the vacuum reflow soldering machine, a circulating air duct is connected to the circulating fan, a heater is installed on the circulating air duct, and the heater can heat the circulating air; An anti-blocking unit, which is fixedly arranged on the circulating air duct and can filter the circulating air to prevent blocking; A pneumatic component, the pneumatic component is fixedly arranged on the circulating air duct, the pneumatic component is connected to the anti-blocking unit, and the pneumatic component can automatically move when circulating hot air; A maintenance component is fixedly arranged at the anti-blocking unit, and the maintenance component can automatically clean and cool the anti-blocking unit.

2. The vacuum reflow soldering equipment with hot air circulation function according to claim 1, characterized in that: The circulating air duct includes a first input pipe, a second input pipe and a first output pipe, one end of the first input pipe is fixedly connected to the input end of the circulating fan, the other end of the first input pipe is connected to the anti-blocking unit, one end of the anti-blocking unit is connected to the second input pipe, the second input pipe is connected to the inner cavity of the vacuum reflow soldering machine, a pneumatic component is installed on the first input pipe, the output end of the circulating fan is fixedly connected to the first output pipe, one end of the first output pipe extends into the inner cavity of the vacuum reflow soldering machine, and a heater is installed on the first output pipe.

3. The vacuum reflow soldering equipment with hot air circulation function according to claim 1, characterized in that: The anti-blocking unit includes a circular shell, a rotating shaft, a disc and an annular filter. The circular shell is fixedly arranged between the first input pipe and the second input pipe. The rotating shaft is rotatably connected in the inner cavity of the circular shell. The circular disk is fixedly arranged at the arc-shaped wall of the rotating shaft. The circular disk is provided with an annular opening, and the annular filter is fixedly arranged at the annular opening of the circular disk.

4. The vacuum reflow soldering equipment with hot air circulation function according to claim 1, characterized in that: The pneumatic component includes a connecting shell, a rotating shaft, a wind wheel and a linkage part. The connecting shell is fixedly arranged at the first input pipe and is connected to the first input pipe. The rotating shaft is rotatably connected in the inner cavity of the connecting shell. The linkage part is arranged between the connecting shell and the anti-blocking unit.

5. The vacuum reflow soldering equipment with hot air circulation function according to claim 4, characterized in that: A wind wheel is fixedly arranged on the arc-shaped wall of the rotating shaft.

6. The vacuum reflow soldering equipment with hot air circulation function according to claim 4, characterized in that: The linkage part includes a first rotating disk, a supporting frame, a second rotating disk, a fourth rotating disk, a third rotating disk, a bevel gear A, a bevel gear B and a rotating rod. One end of the rotating shaft extends to the outer wall of the connecting shell, and the first rotating disk is fixedly arranged at one end of the rotating shaft. The supporting frame is fixedly arranged at the outer wall of the anti-blocking unit. The supporting frame is rotatably connected with a rotating rod, and one end of the rotating rod is fixedly connected with the second rotating disk. A belt is sleeved and connected between the second rotating disk and the first rotating disk, and the other end of the rotating rod is fixedly connected with the fourth rotating disk. The supporting frame is rotatably connected with a rotating rod, and the third rotating disk is fixedly arranged at one end of the rotating rod, and a connecting belt B is sleeved and connected between the third rotating disk and the fourth rotating disk.

7. The vacuum reflow soldering equipment with hot air circulation function according to claim 6, characterized in that: A bevel gear A is fixedly arranged at one end of the rotating rod, and the bevel gear B is fixedly arranged at one end of the rotating shaft, and the bevel gear B and the bevel gear A are meshed with each other.

8. The vacuum reflow soldering equipment with hot air circulation function according to claim 1, characterized in that: The maintenance component includes a cooling part and a cleaning part. The cooling part includes a fixed sleeve and a fan. One end of the fixed sleeve is fixedly arranged on the side wall of the circular shell and is communicated with the inner cavity of the circular shell. The fan is fixedly installed on the other end of the fixed sleeve.

9. The vacuum reflow soldering equipment with hot air circulation function according to claim 8, characterized in that: The cleaning part includes a fixed bracket, a connecting rod, a rotating fan, a fixed plate frame, a cleaning brush and an ash discharge port. The fixed bracket is fixedly arranged in the inner cavity of the fixed sleeve. The fixed bracket is rotatably connected to the connecting rod. The rotating fan is fixedly arranged at the right end of the connecting rod. The fixed plate frame is fixedly arranged at the left end of the connecting rod. The cleaning brush is fixedly arranged on the fixed plate frame.

10. The vacuum reflow soldering equipment with hot air circulation function according to claim 9, characterized in that: The cleaning brush is made of nylon brush filaments, one end of the cleaning brush extends to the annular filter screen and contacts the annular filter screen, the ash discharge port is arranged at the other side wall of the circular shell, and the ash discharge port and the fixed sleeve are in the same straight line.

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