Circuit board drying device with balanced heat release
By setting up preheating zone, drying zone, cooling zone and heat recovery channel in the circuit board drying device, combined with hollow structure and blowing device, the problem of uneven drying temperature of the circuit board is solved, and the drying effect and welding are improved quality.
Patent Information
- Application Number
- CN202420738745.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-11
- Publication Date
- 2025-01-10
- Estimated Expiration
- 2034-04-11
AI Technical Summary
In the prior art, the temperature in the drying equipment is uneven when the circuit board is dried, resulting in poor drying effect and affecting the welding effect.
A circuit board drying device with exothermic balance is designed, including a preheating zone, a drying zone, a cooling zone, a heat recovery channel, a blowing device, a exhaust device and a hollow structure to ensure that the circuit board is heat uniform in the drying zone. and heat utilization is improved through heat recovery.
The heat distribution of the circuit board in the drying area is achieved, the drying effect is improved, the welding quality is ensured, and the heat utilization rate is improved through heat recovery.
Smart Images
Figure CN222335962U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of circuit board processing, in particular to a circuit board drying device with balanced heat release. Background Art
[0002] Printed Circuit Board (PCB), also known as circuit board for short, is one of the important components of the electronics industry. Almost every electronic device, from electronic watches and calculators to computers, communication electronic equipment, and military weapon systems, as long as there are electronic components such as integrated circuits, must use circuit boards. In the process of electronic product research, the most basic success factor is the manufacturing of circuit boards. The manufacturing quality of circuit boards directly affects the quality and cost of the entire product, and even affects the success or failure of commercial competition.
[0003] In the production process of circuit boards, many wet manufacturing processes are involved, such as circuit etching and surface roughening. After these processes, the circuit boards need to be dried in time. At the same time, the flux will better combine the device with the pad after the temperature of the circuit board rises to a certain level to improve the welding effect, so the circuit board also needs to be dried. However, in the prior art, when the circuit board is dried, the temperature in the drying equipment is uneven, and the drying effect is poor. Utility Model Content
[0004] Based on this, it is necessary to provide a circuit board drying device with balanced heat release to address the deficiencies in the prior art.
[0005] A circuit board drying device with balanced heat release, comprising a frame and a conveying device, a drying component, a blowing device, an exhaust device, and a water vapor separation device arranged in the frame; the frame is respectively provided with an inlet, an outlet and a conveying channel connecting the inlet and the outlet on two opposite sides, a heat recovery channel is arranged above the conveying channel, and a preheating zone, a drying zone, and a cooling zone are sequentially arranged along the conveying channel, the conveying device extends into the conveying channel, the drying component is arranged in the drying zone, the blowing device is arranged below the drying device, and the exhaust device and the water vapor separation device are both arranged above the heat recovery channel. Recovery channel, and the water vapor separation device is arranged on the rear side of the exhaust device; an air outlet is arranged above the drying area, and the air outlet is connected to the conveying channel and the heat recovery channel; the exhaust device is arranged between the preheating area and the heat recovery channel; hot air side channels are arranged on both side walls of the drying area, and a heat insulating outer shell and a hollow inner layer are arranged on both side walls of the drying area, and a plurality of hollow holes are arranged on the hollow inner layer, and the hot air side channel is formed between the heat insulating outer shell and the hollow inner layer; a hollow plate is arranged between the conveying device and the drying component, and a plurality of through holes penetrating from top to bottom are arranged on the hollow plate.
[0006] Furthermore, an auxiliary area is provided below the drying component, and the left and right side walls and the front and rear side walls in the extension direction of the auxiliary area are all inclined, and are all arranged in an inclined structure extending from top to bottom toward the middle.
[0007] Furthermore, the bottom surface of the auxiliary area is horizontally extended, and the blowing device is arranged on the bottom surface of the auxiliary area.
[0008] Furthermore, a cooling fan is provided below the conveying device in the cooling zone, and the cooling fan is provided at the front side of the cooling zone.
[0009] Furthermore, the exhaust device is a vortex fan, whose air inlet is arranged horizontally and the air outlet is arranged vertically downward.
[0010] Furthermore, the air outlet is arranged at the rear side of the drying zone and the front end of the cooling zone.
[0011] Furthermore, the conveying device includes two horizontally parallel conveyor belts, each of which is provided with positioning holes; a plurality of conveying baskets are installed on the conveyor belt, each of which has a bottom foot at its bottom end, and the bottom foot corresponds one-to-one to the positioning holes on the conveyor belt.
[0012] Furthermore, the conveying basket includes a quadrilateral bottom frame, four columns and a quadrilateral top frame, and the columns are arranged at the corner positions of the quadrilateral bottom frame; and a plurality of limit strips are arranged side by side on the quadrilateral bottom frame and adjacent columns.
[0013] Furthermore, a plurality of slots are arranged on the top surface of the limit strip; and two ends of the slots are arranged corresponding to two relatively hollow inner layers of the drying area.
[0014] In summary, the utility model sets a preheating zone, a drying zone, a cooling zone, a heat reflux channel, a drying device, a blowing device, a cooling fan and a bottom auxiliary zone, so that the parts of the circuit board in the drying zone are heated relatively evenly as a whole, the uniformity of drying is improved, and the heat can be recovered through the heat reflux channel. In addition, the all-round hollow setting of the conveying basket and the circuit board correspond to the hollow plate and the hollow inner layer in the thickness direction, so that the hot air derived from the hollow plate and the hollow inner layer can quickly enter between adjacent circuit boards, avoiding the board surface blocking the hot air, so that it is heated evenly and the heat utilization rate is large. The utility model has strong practicality and strong promotion significance. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 This is a schematic structural diagram of a circuit board drying device with balanced heat release according to the utility model;
[0016] Figure 2 for Figure 1 Schematic diagram of the internal partitions of the drying device;
[0017] Figure 3 for Figure 2 Structural diagram of the middle drying area;
[0018] Figure 4 for Figure 2 A schematic diagram of the structure of the central heating tube and the hollow plate above it;
[0019] Figure 5 for Figure 2 A schematic diagram of the structure of the hollow inner layer of the side wall of the middle drying area;
[0020] Figure 6 It is a schematic diagram of the structure of the conveying basket. DETAILED DESCRIPTION
[0021] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.
[0022] like Figures 1 to 6 As shown, it is a circuit board drying device with balanced heat release provided by the utility model, and the circuit board drying device with balanced heat release includes a frame 10 and a conveying device 20, a drying assembly 30, a blowing device 40, an exhaust device 50, and a water vapor separation device 60 arranged in the frame 10. The frame 10 is provided with a conveying channel 11 and a heat recovery channel 12 arranged above it, the conveying device 20 extends in the conveying channel 11, the drying assembly 30 is arranged in the middle of the conveying channel 11, the blowing device 40 is arranged below the drying device 30, the exhaust device 50 and the water vapor separation device 60 are both arranged in the heat recovery channel, and the water vapor separation device 60 is arranged at the rear side of the exhaust device 50.
[0023] The frame 10 is provided with an inlet 13 and an outlet 14 on two opposite sides, respectively, and a preheating zone 111, a drying zone 112, and a cooling zone 113 are sequentially provided along the conveying channel 11. The two side walls of the drying zone 112 are provided with hot air side channels, and the two side walls of the drying zone 112 are provided with a heat insulating outer shell and a hollow inner layer 114, and the hollow inner layer 114 is provided with a plurality of hollow holes, and the hot air side channel is formed between the heat insulating outer shell and the hollow inner layer 114. In addition, a hollow plate 115 is provided between the conveying channel 20 and the drying assembly 30, and the hollow plate 115 is provided with a plurality of through holes penetrating from top to bottom. In addition, the outer end of the hollow plate 115 is connected to the bottom end of the hollow inner layer 114.
[0024] An air outlet 117 is also provided between the conveying channel 11 and the heat recovery channel 12, and the air outlet 117 is provided at the rear side of the drying area 112 and the front end of the cooling area 113. The drying component 30 includes a plurality of heating tubes, and the plurality of heating tubes are arranged side by side below the hollow plate 115. In addition, an auxiliary area 116 is also provided below the drying component 30, and the auxiliary area 116 is arranged from top to bottom in a larger upper portion and smaller lower portion, and the left and right side walls and the front and rear side walls in the extension direction of the auxiliary area 116 are all inclined, and are all arranged in an inclined structure extending from top to bottom toward the middle. The blowing device 40 is arranged on the bottom surface in the middle of the auxiliary area 116, and the inclined surface of the auxiliary area 116 is conducive to the uniform conduction of wind.
[0025] A cooling fan 70 is also provided below the conveying device 20 of the cooling zone 113. The cooling fan 70 is provided at the front side of the cooling zone 113. The cooling fan 70 blows air upwards, and can quickly blow the heat on the circuit board just removed from the drying zone upwards into the air outlet 117. The exhaust device 50 is provided at the front end of the heat recovery channel 12. In this embodiment, the exhaust device 50 is a vortex fan, and its air inlet and air outlet are arranged at 90 degrees. The wind of the heat recovery channel 12 enters the exhaust device 50 horizontally, and then blows downwards into the preheating zone 111.
[0026] The conveying device 20 includes two horizontally parallel conveyor belts 21, and the conveyor belts 21 are provided with positioning holes 22. A plurality of conveyor baskets 80 are installed on the conveyor belts 21, and the circuit boards are installed in the conveyor baskets 80. Specifically, a foot 81 is provided at the bottom end of the conveyor basket 80, and the foot 81 corresponds to the positioning holes 22 on the conveyor belt. During conveying, the foot 81 of the conveyor basket 80 is embedded in the positioning holes 22. The conveyor basket 80 includes a quadrilateral bottom frame 82, four columns 83 and a quadrilateral top frame 84, and the columns 83 are arranged at the corner positions of the quadrilateral bottom frame 82. A plurality of limit strips 85 are arranged side by side on the quadrilateral bottom frame 82, and a plurality of card slots are arranged on the top surface of the limit strips 85. The two ends of the limit strip 85 are installed on the corresponding two bottom frames. A limiting strip 85 is also provided on the adjacent column 83 on the same side. The limiting strip 85 is arranged in parallel with the limiting strip 85 of the bottom frame 82. A limiting groove is provided on the inner surface of the limiting strip 85. The limiting groove corresponds to the card slot one by one, so as to facilitate the installation of the circuit board. When in use, the bottom end of the circuit board is clamped in the card slots of several limiting strips 85, and the side is clamped in the corresponding limiting groove, so as to achieve the limitation of the circuit board. In this embodiment, the circuit board is placed upright in the conveying basket 80, and the two opposite end faces in the thickness direction thereof are arranged corresponding to the hollow inner layer 114.
[0027] During operation, the heating tube of the drying component 30 starts to generate heat, and the blowing device 40 blows the hot air from bottom to top to the drying area 112. The hot air is respectively emitted from the bottom and both sides toward the middle of the drying area 112, so that the overall heat of the drying area 112 is relatively uniform. The heat then enters the heat recovery channel 12 through the air outlet 117 at the rear end of the drying area 112, and after separation by the water-gas separation device 60, the dry hot air enters the preheating area 111, and the conveying device 20 delivers the conveying basket 80 with the circuit board to the preheating area 111 for preheating, and then enters the drying area 112 for drying; after drying for a certain period of time, it enters the cooling area 113 for cooling.
[0028] In summary, the utility model provides a preheating zone 111, a drying zone 112, a cooling zone 113, a heat reflux channel 12, a drying device 20, a blowing device 40, a cooling fan 70 and a bottom auxiliary zone 116, so that the parts of the circuit board in the drying zone 112 are heated relatively evenly as a whole, the uniformity of drying is improved, and the heat can be recovered through the heat reflux channel. In addition, the all-round hollowing setting of the conveying basket 80 and the circuit board correspond to the hollow plate 115 and the hollow inner layer 114 in the thickness direction, so that the hot air derived from the hollow plate 115 and the hollow inner layer 114 can quickly enter between adjacent circuit boards, avoiding the board surface blocking the hot air, so that it is heated evenly and has a high heat utilization rate. The utility model has strong practicality and strong promotion significance.
[0029] The above-mentioned embodiment only expresses one implementation method of the utility model, and its description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.
Claims
1. A circuit board drying device with balanced heat release, characterized in that: The invention comprises a frame and a conveying device, a drying component, a blowing device, an exhaust device, and a water vapor separation device arranged in the frame; the frame is respectively provided with an inlet, an outlet, and a conveying channel connecting the inlet and the outlet on two opposite sides; a heat recovery channel is arranged above the conveying channel; a preheating zone, a drying zone, and a cooling zone are arranged in sequence along the conveying channel; the conveying device extends into the conveying channel; the drying component is arranged in the drying zone; the blowing device is arranged below the drying device; the exhaust device and the water vapor separation device are both arranged in the heat recovery channel; and the water vapor separation device is provided in the water vapor separation device. The steam separation device is arranged on the rear side of the exhaust device; an air outlet is arranged above the drying area, and the air outlet is connected to the conveying channel and the heat recovery channel; the exhaust device is arranged between the preheating area and the heat recovery channel; hot air side channels are arranged on both side walls of the drying area, and a heat insulating outer shell and a hollow inner layer are arranged on the two side walls of the drying area, and a plurality of hollow holes are arranged on the hollow inner layer, and the hot air side channel is formed between the heat insulating outer shell and the hollow inner layer; a hollow plate is arranged between the conveying device and the drying component, and a plurality of through holes penetrating from top to bottom are arranged on the hollow plate.
2. A circuit board drying device with balanced heat release as claimed in claim 1, characterized in that: An auxiliary area is also provided below the drying component. The left and right side walls and the front and rear side walls in the extension direction of the auxiliary area are all arranged in an inclined manner, and are all arranged in an inclined structure extending from top to bottom toward the middle.
3. A circuit board drying device with balanced heat release as claimed in claim 2, characterized in that: The bottom surface of the auxiliary area is horizontally extended, and the blowing device is arranged on the bottom surface of the auxiliary area.
4. A circuit board drying device with balanced heat release as claimed in claim 1, characterized in that: A cooling fan is also arranged below the conveying device in the cooling zone, and the cooling fan is arranged at the front side of the cooling zone.
5. A circuit board drying device with balanced heat release as claimed in claim 1, characterized in that: The air exhaust device is a vortex fan, the air inlet of which is arranged horizontally, and the air outlet is arranged vertically downward.
6. A circuit board drying device with balanced heat release as claimed in claim 1, characterized in that: The air outlet is arranged at the rear side of the drying area and the front end of the cooling area.
7. A circuit board drying device with balanced heat release as claimed in claim 1, characterized in that: The conveying device comprises two horizontally parallel conveyor belts, on which positioning holes are arranged; a plurality of conveyor baskets are mounted on the conveyor belts, and the bottom ends of the conveyor baskets are provided with feet, which correspond one to one with the positioning holes on the conveyor belts.
8. A circuit board drying device with balanced heat release as claimed in claim 7, characterized in that: The conveying basket comprises a quadrilateral bottom frame, four upright posts and a quadrilateral top frame, wherein the upright posts are arranged at the corner positions of the quadrilateral bottom frame; and a plurality of limit strips are arranged side by side on the quadrilateral bottom frame and the adjacent upright posts.
9. A circuit board drying device with balanced heat release as claimed in claim 8, characterized in that: A plurality of slots are arranged on the top surface of the limit strip; and two ends of the slots are arranged corresponding to two opposite hollow inner layers of the drying area.