CN108237296A - A kind of reflow soldering cooling module of the flat coil pipe of band - Google Patents

Abstract

Reflow soldering the present invention relates to a kind of flat coil pipe of band cools down module, mounted on reflow soldering outlet at bottom end, the cooling module includes housing, cooling coil and blowing unit, the housing is three layers of hollow-core construction, it is respectively from top to bottom air supplying layer, cooling layer and air outlet layer, it is isolated respectively by carrying the partition board in air port between the air supplying layer and cooling layer and between cooling layer and air outlet layer, the housing both sides are equipped with vertically disposed air-out cavity, the air-out cavity connection air outlet layer, the cooling coil is flat panel drawer shape, cooling coil passes through air-out cavity horizontal detachable in side to be mounted on cooling layer；Thermal current in reflow soldering enters cooling layer by air supplying layer, enters air outlet layer after cooling coil is cooled down in cooling layer, air-flow after cooling to both sides is dispelled and discharged from both sides air-out cavity by blowing unit.Compared with prior art, compact-sized, good cooling results of the invention.

Description

A reflow oven cooling module with a flat coil

technical field

The invention relates to a reflow oven cooling module, in particular to a reflow oven cooling module with flat coil tubes.

Background technique

The reflow oven is a kind of welding equipment in the SMT industry. It can provide an automatic and stable heating environment, so that the solder paste in the furnace is heated and melted, so that the pre-mounted electrical components on the PCB board and the PCB board are reliably combined through the solder alloy. At the same time, in the reflow furnace At the outlet end, there will be a cooling area, which is usually composed of one or more modules, which cool the solder paste and fix the electrical components.

Outside the cooling zone, there are often some heat exchange devices. The refrigerant may be air or water. The connection between different areas will take up a lot of valuable equipment space, and at the same time, its cost is also relatively high.

Contents of the invention

The object of the present invention is to provide a reflow oven cooling module with a flat coil tube in order to overcome the above-mentioned defects in the prior art.

The purpose of the present invention can be achieved through the following technical solutions:

A reflow furnace cooling module with a flat coil, installed at the outlet end of the bottom of the reflow furnace, the cooling module includes a shell, a cooling coil and a blowing unit, and the shell is a three-layer hollow The structure, from top to bottom, is the air inlet layer, the cooling layer and the air outlet layer respectively, and the air inlet layer and the cooling layer and between the cooling layer and the air outlet layer are respectively separated by partitions with air outlets, Both sides of the housing are provided with vertical air outlet chambers, the air outlet chambers communicate with the air outlet layer, the cooling coil is flat drawer-shaped, and the cooling coil passes through one side The air outlet cavity is horizontally detachable and installed on the cooling layer;

The hot air flow in the reflow oven enters the cooling layer through the air inlet layer, and enters the air outlet layer after being cooled by the cooling coil in the cooling layer. The blowing unit blows the cooled air to both sides and discharges it from the air outlet cavity on both sides .

The cooling coil includes a frame and a stainless steel hose, the frame is a rectangular frame, one end of the frame is provided with a sealing baffle to form a drawer, and the stainless steel hose is wound around the rectangular frame on the side edge.

An air inlet hole plate is arranged above the air inlet layer.

The bottom of the air outlet cavity is sealed and the top is open, and the top opening end is connected to the top module on the top of the reflow oven, and the top module is used to blow the cooled air to the PCB located in the middle of the reflow oven. board.

The blowing unit includes a blowing motor and an impeller, the impeller is arranged on the air outlet layer, and the blowing motor is connected to the impeller.

A blower motor installation layer is also provided below the air outlet layer, and the blower motor is fixed on the bottom of the blower motor installation layer, and the output shaft of the blower motor passes through the motor installation layer and the air outlet layer in turn to connect with the impeller.

The bottom plate of the blowing layer is a detachable bottom plate, and the top cover of the air outlet layer is a detachable top cover.

A plurality of open inspection ports are provided under the installation layer of the blower motor.

Compared with prior art, the present invention has following advantage:

(1) The cooling module of the present invention is arranged in a three-layer structure, and the cooling coil is arranged in the middle layer in the shape of a flat drawer. After the hot air in the reflow oven enters, it is cooled by the cooling coil, and then the air is discharged from both sides The cavity is discharged to form a circulation structure. In the present invention, the cooling coil adopts a built-in method, which changes the traditional external method, and has a compact structure and hardly occupies external space;

(2) The traditional heat exchange device is placed in the top space of the reflow oven. When installing and maintaining, it is necessary to use ladders or other tools to carry out climbing operations. The cooling coil of the present invention is designed as a drawer, directly from the reflow The side of the welding furnace is installed, and the operation is extremely convenient.

(3) The cooling coil of the present invention adopts a winding method. When the hot air flow passes from top to bottom, the contact area between the hot air flow and the cooling coil is large, and the cooling effect is good;

(4) The air inlet orifice plate provided by the present invention can effectively prevent the residual solder or other objects on the PCB in the reflow oven from falling to affect the performance of the cooling module while ensuring the entry of hot airflow, which improves the performance of the cooling module. Performance;

(5) The cooperation mode of the air outlet cavity and the blowing unit of the present invention can make the air flow after cooling directly flow upwards into the top module, the resistance along the way is small, and the wind speed blowing to the PCB board is high;

(6) The bottom plate of the blowing layer of the present invention is designed as a detachable bottom plate, and at the same time cooperates with an open inspection port, so as to facilitate maintenance and cleaning.

Description of drawings

Fig. 1 is the structural representation of the cooling module of the reflow oven with the flat coil of the present invention;

Fig. 2 is the main cross-sectional view of the cooling module of the reflow oven with the flat coil of the present invention;

Fig. 3 is a side sectional view of the reflow oven cooling module with a flat coil of the present invention;

In the figure, 1 is the housing, 2 is the cooling coil, 3 is the blowing unit, 4 is the air outlet cavity, 5 is the air inlet orifice, 6 is the inspection port, 11 is the air inlet layer, 12 is the cooling layer, 13 For the air outlet layer, 14 is a blower motor installation layer, 21 is a frame, 22 is a stainless steel hose, 31 is a blower motor, and 32 is an impeller.

Detailed ways

The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

Example

As shown in Figures 1 to 3, a reflow furnace cooling module with a flat coil is installed at the outlet end of the bottom of the reflow furnace. The cooling module includes a shell 1, a cooling coil 2 and a blowing unit 3. The shell 1 is a three-layer hollow structure, from top to bottom are the air inlet layer 11, the cooling layer 12 and the air outlet layer 13, between the air inlet layer 11 and the cooling layer 12 and between the cooling layer 12 and the air outlet layer 13 Separated by partitions with air outlets, the air inlet layer 11 is provided with an air inlet hole plate 5, and the two sides of the housing 1 are provided with a vertically arranged air outlet cavity 4, and the air outlet cavity 4 is connected to the air outlet layer 13 The air outlet cavity 4 is sealed at the bottom and opened at the top, and the top opening end is connected to the top module on the top of the reflow oven, and the top module is used to blow the cooled air to the PCB board located in the middle of the reflow oven.

The cooling coil 2 is in the shape of a flat drawer. The cooling coil 2 passes through the air outlet cavity 4 on one side and is installed on the cooling layer 12 in a horizontal detachable manner. The cooling coil 2 includes a frame body 21 and a stainless steel hose 22. The frame body 21 is A rectangular parallelepiped frame, one end of the frame 21 is provided with a sealing baffle to form a drawer shape, and the stainless steel hose 22 is wound on the side edge of the rectangular parallelepiped frame 21 .

The blowing unit 3 includes a blowing motor 31 and an impeller 32 , the impeller 32 is arranged on the air outlet layer 13 , and the blowing motor 31 is connected to the impeller 32 . The air outlet layer 13 below is also provided with a blower motor 31 installation layer 14, and the blower motor 31 is fixed on the bottom of the blower motor 31 installation layer 14, and the output shaft of the blower motor 31 passes through the motor installation layer and the air outlet layer 13 and is connected with the impeller 32 successively. The bottom plate of the blowing layer is a detachable bottom plate, and the top cover of the air outlet layer is a detachable top cover. A plurality of open inspection ports 6 are arranged below the installation layer 14 of the blower motor 31 .

The working principle of the present invention: the reflow oven cooling module is installed at the outlet end of the bottom of the reflow oven, the stainless steel hose 22 is wound on the side edge of the cuboid frame 21 to form a flat drawer-shaped cooling coil 2, and the cooling coil 2 is installed In the cooling layer 12, when the reflow soldering furnace is working, the hot air in the reflow soldering furnace enters the cooling layer 12 through the air inlet layer 11, and enters the air outlet layer 13 after the cooling layer 12 is cooled by the cooling coil 2, and the blowing unit 3 The cooled air flow is blown to both sides and discharged from the air outlet chambers 4 on both sides. The gas flow direction is shown by the arrows in Fig. 2 and Fig. 3 .

The cooling module of the present invention is composed of a special module and a specially designed cooling coil 2, which are combined together like a drawer and hardly occupy the external space of the equipment, and the hot air in the module and The cooling coil 2 directly performs heat exchange inside the module, instead of entering the heat exchanger through a long pipe like the traditional heat exchange method, thereby greatly reducing energy loss and greatly improving heat exchange efficiency improvement.

The cooling coil 2 is similar to a drawer inserted into the module. It is in the shape of a cuboid and is wound by a stainless steel hose 22. The air will pass through the cooling coil 2 before it is discharged from the module and blows to the PCB board. Heat exchange, the heat in the air is taken away by the cooling water to achieve cooling.

The design of this product has also fully considered the ease of installation and maintenance. The cooling coil 2 is installed from the side of the reflow oven, which is extremely convenient. In order to facilitate the cleaning of residues in the module, there is a Maintenance window, and some parts are designed to be detachable.

Claims (8)

1. A reflow oven cooling module with a flat plate coil, installed at the bottom outlet of the reflow oven, is characterized in that the cooling module includes a housing (1), a cooling coil (2) and The blowing unit (3), the housing (1) is a three-layer hollow structure, from top to bottom are the air inlet layer (11), the cooling layer (12) and the air outlet layer (13), the inlet Between the air layer (11) and the cooling layer (12) and between the cooling layer (12) and the air outlet layer (13) are respectively separated by partitions with air outlets, and the two sides of the housing (1) are provided with There is a vertical air outlet cavity (4), the air outlet cavity (4) communicates with the air outlet layer (13), the cooling coil (2) is flat drawer-shaped, and the cooling coil (2) Pass through one side of the air outlet cavity (4) and install it on the cooling layer (12) in a horizontal detachable manner; The hot air flow in the reflow oven enters the cooling layer (12) through the air inlet layer (11), and enters the air outlet layer (13) after the cooling layer (12) is cooled by the cooling coil (2), and the blowing unit (3) The cooled air flow is blown to both sides and discharged from the air outlet chambers (4) on both sides. 2. A reflow oven cooling module with flat coils according to claim 1, characterized in that the cooling coil (2) comprises a frame (21) and a stainless steel hose (22) , the frame (21) is a rectangular frame (21), and one end of the frame (21) is provided with a sealing baffle to form a drawer shape, and the stainless steel hose (22) is wound around the rectangular frame ( 21) On the side edge. 3. A reflow oven cooling module with flat coils according to claim 1, characterized in that an air inlet hole plate (5) is arranged above the air inlet layer (11). 4. A reflow oven cooling module with a flat plate coil according to claim 1, characterized in that the bottom of the air outlet cavity (4) is sealed, the top is open, and the top opening is connected to the reflow The top module on the top of the soldering furnace is used to blow the cooled air to the PCB board located in the middle of the reflow soldering furnace. 5. The cooling module of a reflow oven with a flat plate coil according to claim 1, wherein the blowing unit (3) includes a blowing motor (31) and an impeller (32), and the The impeller (32) is arranged on the air outlet layer (13), and the blowing motor (31) is connected to the impeller (32). 6. A reflow oven cooling module with flat coils according to claim 5, characterized in that a blower motor (31) installation layer (14) is also provided below the air outlet layer (13) ), the blowing motor (31) is fixed on the bottom of the blowing motor (31) installation layer (14), and the output shaft of the blowing motor (31) passes through the motor installation layer and the air outlet layer (13) and the described impeller ( 32) Connect. 7. A reflow oven cooling module with flat coils according to claim 6, wherein the bottom plate of the blowing layer is a detachable bottom plate, and the top cover of the air outlet layer is a detachable top cover. 8. A reflow oven cooling module with a flat plate coil according to claim 7, characterized in that a plurality of open inspection ports are provided under the installation layer (14) of the blower motor (31) (6).