Cooling device of reflow soldering furnace

Abstract

The cooling device comprises a machine body, a cooling chamber is arranged at the top end in the machine body, an operation table is arranged at the bottom of the inner wall of the cooling chamber, an adjusting mechanism is arranged at the top of the cooling chamber, a cooling mechanism is arranged at the end of the adjusting mechanism, and installation openings are symmetrically formed in the top of the machine body. A mounting opening is formed in the machine body, a mounting cylinder is fixedly connected into the mounting opening, a cooling fan is fixedly mounted in the mounting cylinder, a mounting cavity is formed in the position, below the cooling chamber, in the machine body, and a cold water chamber is arranged at the bottom end in the machine body. The four cooling mechanisms are arranged, so that the cold air outlets of the cooling mechanisms reach the position closest to the attached circuit board element, and the cold air outlets of the four cooling mechanisms blow cold air towards the circuit board with the attached element at the same time, so that the purpose of rapid cooling is achieved, and the cooling efficiency is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of cooling equipment, in particular to a cooling device for a reflow soldering furnace. Background Art

[0002] Reflow soldering technology is not unfamiliar in the field of electronic manufacturing. The components on various boards used in our computers are soldered to the circuit board through this process. There is a heating circuit inside this equipment, which heats the air or nitrogen to a high enough temperature and blows it to the circuit board with the components already attached, so that the solder on both sides of the components melts and bonds with the main board. The advantage of this process is that the temperature is easy to control, oxidation can be avoided during the soldering process, and the manufacturing cost is easier to control. The reflow oven process is to achieve the mechanical and electrical connection between the solder end or pin of the surface mounted component and the printed circuit board pad by remelting the paste solder pre-allocated to the printed circuit board pad. The reflow oven is the last key process of SMT (surface mount technology). It is a real-time process control. Its process changes are relatively complex and involve many process parameters. Among them, the setting of the temperature curve is the most important and directly determines the quality of reflow soldering.

[0003] The existing reflow oven cooling device usually cools the circuit board with attached components by blowing cold air toward the cooling chamber through a cold air duct. However, the space in the cooling chamber is large, and blowing cold air in the space cannot quickly cool the circuit board with attached components, which is not conducive to the rapid bonding of components and the mainboard, and the cooling efficiency is low. Therefore, we propose a cooling device for the reflow oven. Utility Model Content

[0004] The utility model aims to provide a cooling device for a reflow oven to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a cooling device for a reflow soldering furnace, comprising a body, a cooling chamber is arranged at the top of the body, and an operating table is arranged at the bottom of the inner wall of the cooling chamber, an adjustment mechanism is arranged at the top of the cooling chamber, and a cooling mechanism is arranged at the end of the adjustment mechanism, mounting openings are symmetrically opened at the top of the body, and a mounting cylinder is fixedly connected to the mounting opening, a cooling fan is fixedly installed in the mounting cylinder, an mounting cavity is arranged inside the body below the cooling chamber, and a cold water chamber is arranged at the bottom end of the body.

[0006] Preferably, the adjusting mechanism comprises a movable plate, a threaded rod, a lifting block, an adjusting rod, a mounting box and a rotating motor; four movable plates are equidistantly slidably arranged on the top of the operating table; four adjusting slots are equidistantly opened on the top of the operating table; the bottom centers of the four movable plates are integrally connected with sliders, and the sliders are slidably connected in the adjusting slots; a threaded rod is rotatably connected in the mounting cavity through a bearing; a lifting block is threadedly connected on the outer side of the threaded rod; the four side walls of the lifting block are rotatably connected with adjusting rods; the ends of the four adjusting rods are rotatably connected to the bottoms of four sliders respectively; a mounting box is fixedly installed on the top of the inner wall of the cold water chamber, and a rotating motor is fixedly installed in the mounting box; the output shaft end of the rotating motor extends into the mounting cavity and is fixedly connected to the threaded rod.

[0007] Preferably, the cooling mechanism includes an air pump, a cold air pipe, a branch pipe, a cold air outlet and an air inlet pipe. The air pump is fixedly installed on the bottom end of the side wall of the machine body, the air inlet end of the air pump is fixedly connected to the air inlet pipe, and the air inlet pipe runs through the installation cavity, the end of the air inlet pipe is connected to the outside, the air outlet end of the air pump is fixedly connected to the ventilation pipe, and the ends of the ventilation pipe form four cold air pipes, the four cold air pipes are respectively fixedly installed on the surfaces of four movable plates, a section of the cold air pipe located on the surface of the movable plate is equidistantly connected with branch pipes, and the ends of the branch pipes are equipped with cold air outlets.

[0008] Preferably, a section of the cold air duct located on the surface of the movable plate is arranged in a serpentine structure, and one end of the air inlet duct located inside the cold water chamber is in a spiral structure.

[0009] Preferably, the side wall of the machine body is provided with a water inlet and a water outlet at the top and the bottom of the cold water chamber respectively, and electric control valves are installed on the outside of the water inlet and the water outlet.

[0010] Preferably, connecting doors are symmetrically provided on the surfaces of the side walls of the machine body located in the installation cavity and the cooling chamber.

[0011] Preferably, self-locking wheels are installed at the four corners of the bottom of the body.

[0012] Preferably, the branch pipe is a hard pipe.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] 1. The utility model can adjust the positions of the four cooling mechanisms according to the size of the circuit board, so that the cold air outlets of the cooling mechanisms reach the position closest to the bonded circuit board components. The multiple cold air outlets of the four cooling mechanisms simultaneously blow cold air toward the circuit board with the components bonded, thereby achieving the purpose of rapid cooling and greatly improving the cooling efficiency.

[0015] 2. The utility model installs two cooling fans on the top of the machine body, which can cool the circuit board while making the cooling fans work to quickly discharge the hot air in the cooling chamber and quickly distribute the cold air inside the cooling chamber, thereby achieving the purpose of rapid cooling. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0017] Figure 2 It is a schematic diagram of the cross-sectional structure of the machine body of the utility model;

[0018] Figure 3 This is a schematic diagram of the internal connection structure of the installation cavity of the utility model;

[0019] Figure 4 It is a schematic diagram of the structure of the enlarged view of B of the utility model;

[0020] Figure 5 This is a schematic diagram of the structure of the enlarged view of point A of the present utility model.

[0021] In the figure: 1. machine body; 2. cooling chamber; 3. operating table; 4. adjusting mechanism; 5. cooling mechanism; 6. mounting cylinder; 7. cooling fan; 8. adjusting slot; 9. moving plate; 10. threaded rod; 11. lifting block; 12. adjusting rod; 13. air pump; 14. mounting cavity; 15. cold air duct; 16. branch pipe; 17. cold air outlet; 18. mounting box; 19. rotating motor; 20. air inlet duct; 21. water inlet; 22. water outlet; 23. connecting door; 24. cold water chamber. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions 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.

[0023] See also Figure 1-5 The utility model provides a technical solution: a cooling device for a reflow soldering furnace, comprising a body 1, a cooling chamber 2 is arranged at the top of the body 1, and an operating table 3 is arranged at the bottom of the inner wall of the cooling chamber 2, an adjusting mechanism 4 is arranged at the top of the cooling chamber 2, and a cooling mechanism 5 is arranged at the end of the adjusting mechanism 4, a mounting opening is symmetrically opened at the top of the body 1, and a mounting cylinder 6 is fixedly connected in the mounting opening, a cooling fan 7 is fixedly installed in the mounting cylinder 6, an mounting cavity 14 is arranged below the cooling chamber 2 inside the body 1, and a cold water chamber 24 is arranged at the bottom of the body 1.

[0024] It should be noted that when the utility model is used, the connecting door 23 in the cooling chamber 2 is opened, the circuit board is located on the top of the operating table 3, and the connecting door 23 of the cooling chamber 2 is closed. The positions of the adjusting mechanism 4 and the cooling mechanism 5 are adjusted according to the size of the circuit board. When adjusting, it is only necessary to control the rotating motor 19 through the control system provided in the device to rotate the threaded rod 10, and the lifting block 11 is moved down through the threaded connection between the lifting block 11 and the threaded rod 10. Under the action of the adjusting rod 12, the four movable plates 9 are moved toward the circuit board, and the cooling mechanism 5 on the movable plate 9 approaches the circuit board at the closest distance, and then the air pump 13 works to make the extracted wind cool during the process of passing through the inside of the cold water chamber 24, and the cold wind reaches the four cold air pipes 15, and the cold air is blown toward the circuit board through the four cold air pipes 15 to cool the components attached to the circuit board, and at the same time, the heat dissipation fan 7 works to extract the hot air inside the cooling chamber 2, so that the inside of the cooling chamber 2 quickly reaches a cooling environment, thereby achieving the purpose of rapid cooling.

[0025] The adjusting mechanism 4 comprises a movable plate 9, a threaded rod 10, a lifting block 11, an adjusting rod 12, a mounting box 18 and a rotating motor 19. Four movable plates 9 are equidistantly slidably arranged on the top of the operating platform 3. Four adjusting slots 8 are equidistantly opened on the top of the operating platform 3. The bottom centers of the four movable plates 9 are integrally connected with sliders, and the sliders are slidably connected in the adjusting slots 8. A threaded rod 10 is rotatably connected in the mounting cavity 14 through a bearing. The outer side of the threaded rod 10 is threadedly connected with a lifting block 11. The four side walls of the lifting block 11 are rotatably connected with adjusting rods 12. The ends of the four adjusting rods 12 are rotatably connected to the bottoms of the four sliders, respectively. A mounting box 18 is fixedly installed on the top of the inner wall of the cold water chamber 24, and a rotating motor 19 is fixedly installed in the mounting box 18. The output shaft end of the rotating motor 19 extends into the mounting cavity 14 and is fixedly connected to the threaded rod 10.

[0026] The cooling mechanism 5 includes an air pump 13, a cold air pipe 15, a branch pipe 16, a cold air outlet 17 and an air inlet pipe 20. The air pump 13 is fixedly installed at the bottom end of the side wall of the body 1, and the air inlet end of the air pump 13 is fixedly connected to the air inlet pipe 20, and the air inlet pipe 20 runs through the installation cavity 14. The end of the air inlet pipe 20 is connected to the outside world. The air outlet end of the air pump 13 is fixedly connected to the ventilation pipe, and four cold air pipes 15 are formed at the ends of the ventilation pipes. The four cold air pipes 15 are respectively fixedly installed on the surfaces of four movable plates 9. The cold air pipe 15 is located on a section of the surface of the movable plate 9 and is equidistantly connected to the branch pipe 16, and the end of the branch pipe 16 is installed with a cold air outlet 17.

[0027] It should be noted that during cooling, the air pump 13 is controlled to work so that the extracted air is cooled during the process of passing through the cold water chamber 24. The cold air reaches the four cold air pipes 15 and blows cold air toward the circuit board through the four cold air pipes 15 to cool down the components attached to the circuit board. At the same time, the heat dissipation fan 7 works to extract the hot air inside the cooling chamber 2, so that the inside of the cooling chamber 2 quickly reaches a cooling environment, thereby achieving the purpose of rapid cooling.

[0028] A section of the cold air pipe 15 located on the surface of the movable plate 9 is arranged in a serpentine structure, and one end of the air inlet pipe 20 located inside the cold water chamber 24 is arranged in a spiral structure.

[0029] It should be noted that the cold air duct 15 is arranged in a serpentine structure, so that the cold air outlets 17 thereon can be widely distributed on the surface of the movable plate 9, so that cold air can be blown toward the circuit board with components attached on a large scale, thereby achieving the purpose of rapid cooling thereof. The air inlet duct 20 in the cold water chamber 24 is arranged in a spiral structure, which can expand the walking path of the wind inside the air inlet duct 20 in the cold water chamber 24, thereby achieving rapid cooling of the gas inside the air inlet duct 20.

[0030] The side wall of the machine body 1 is provided with a water inlet 21 and a water outlet 22 at the top and bottom of the cold water chamber 24 , respectively, and electric control valves are installed on the outsides of the water inlet 21 and the water outlet 22 .

[0031] It should be noted that the water inlet 21 facilitates the flow of cold water into the cold water chamber 24 of the box, and the water outlet 22 facilitates the discharge of water from the cold water chamber 24. The setting of the electric control valve facilitates the control of the opening and closing of the water inlet 21 and the water outlet 22.

[0032] The side wall of the machine body 1 is symmetrically provided with connecting doors 23 on the surface of the installation cavity 14 and the cooling chamber 2 .

[0033] It should be noted that the connection door 23 on the installation cavity 14 is provided to facilitate the inspection of the components inside the installation cavity 14, and the connection door 23 on the cooling chamber 2 is provided to facilitate the placement and removal of the components to be cooled.

[0034] Self-locking wheels are installed at the four corners of the bottom of the body 1.

[0035] It should be noted that the self-locking wheels at the bottom of the body 1 facilitate its movement.

[0036] The branch pipe 16 is a hard pipe.

[0037] It should be noted that the branch pipe 16 has a certain hardness and can be a plastic pipe with a certain supporting performance, so that the branch pipe 16 can support the cold air outlet 17 to facilitate cooling of the circuit board.

[0038] In the description of the present invention, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inside", "front", "center", "both ends" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying 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 orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0039] In addition, the terms "first", "second", "third" and "fourth" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first", "second", "third" and "fourth" may explicitly or implicitly include at least one of such features.

[0040] In the present utility model, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, it 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 an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the utility model according to the specific circumstances.

[0041] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A cooling device for a reflow oven, comprising a body (1), characterized in that: A cooling chamber (2) is arranged at the top of the interior of the machine body (1), and an operating table (3) is arranged at the bottom of the inner wall of the cooling chamber (2); an adjustment mechanism (4) is arranged at the top of the cooling chamber (2), and a cooling mechanism (5) is arranged at the end of the adjustment mechanism (4); a mounting opening is symmetrically provided at the top of the machine body (1), and a mounting cylinder (6) is fixedly connected in the mounting opening, and a cooling fan (7) is fixedly installed in the mounting cylinder (6); a mounting cavity (14) is arranged inside the machine body (1) below the cooling chamber (2), and a cold water chamber (24) is arranged at the bottom of the interior of the machine body (1); The adjusting mechanism (4) comprises a movable plate (9), a threaded rod (10), a lifting block (11), an adjusting rod (12), a mounting box (18) and a rotating motor (19); four movable plates (9) are equidistantly slidably arranged on the top of the operating table (3); four adjusting slots (8) are equidistantly opened on the top of the operating table (3); the bottom centers of the four movable plates (9) are integrally connected with a slider, and the slider is slidably connected in the adjusting slot (8); a threaded rod (12) is rotatably connected in the mounting cavity (14) via a bearing. 10), the outer side of the threaded rod (10) is threadedly connected to a lifting block (11), the four side walls of the lifting block (11) are rotatably connected to adjusting rods (12), the ends of the four adjusting rods (12) are rotatably connected to the bottoms of four sliders respectively, a mounting box (18) is fixedly installed on the top of the inner wall of the cold water chamber (24), and a rotating motor (19) is fixedly installed in the mounting box (18), and the output shaft end of the rotating motor (19) extends into the mounting cavity (14) and is fixedly connected to the threaded rod (10).

2. The cooling device for a reflow oven according to claim 1, characterized in that: The cooling mechanism (5) comprises an air pump (13), a cold air pipe (15), a branch pipe (16), a cold air outlet (17) and an air inlet pipe (20); the air pump (13) is fixedly installed at the bottom end of the side wall of the machine body (1); the air inlet end of the air pump (13) is fixedly connected to the air inlet pipe (20), and the air inlet pipe (20) passes through the installation cavity (14); the end of the air inlet pipe (20) is connected to the outside; the air outlet end of the air pump (13) is fixedly connected to a ventilation pipe, and the ends of the ventilation pipes form four cold air pipes (15); the four cold air pipes (15) are respectively fixedly installed on the surfaces of four movable plates (9); a section of the cold air pipe (15) located on the surface of the movable plate (9) is equidistantly connected to the branch pipe (16), and the end of the branch pipe (16) is equipped with a cold air outlet (17).

3. The cooling device of a reflow oven according to claim 2, characterized in that: The cold air pipe (15) is located on a section of the surface of the movable plate (9) and is arranged in a serpentine structure, and the air inlet pipe (20) is located at one end inside the cold water chamber (24) and is arranged in a spiral structure.

4. The cooling device for a reflow oven according to claim 3, characterized in that: The side wall of the machine body (1) is provided with a water inlet (21) and a water outlet (22) at the top and bottom of the cold water chamber (24), respectively, and electric control valves are installed on the outsides of the water inlet (21) and the water outlet (22).

5. The cooling device for a reflow oven according to claim 4, characterized in that: The side walls of the machine body (1) are symmetrically provided with connecting doors (23) on the surfaces of the installation cavity (14) and the cooling chamber (2).

6. The cooling device of a reflow oven according to claim 5, characterized in that: Self-locking wheels are installed at the four corners of the bottom of the machine body (1).

7. The cooling device of a reflow oven according to claim 6, characterized in that: The branch pipe (16) is a hard pipe.

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