CN219942759U - Cold air circulating and filtering structure of reflow oven - Google Patents
Cold air circulating and filtering structure of reflow oven Download PDFInfo
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- CN219942759U CN219942759U CN202321047607.6U CN202321047607U CN219942759U CN 219942759 U CN219942759 U CN 219942759U CN 202321047607 U CN202321047607 U CN 202321047607U CN 219942759 U CN219942759 U CN 219942759U
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- cooling
- air
- cooling structure
- filter
- impeller
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- 238000001914 filtration Methods 0.000 title abstract description 16
- 238000001816 cooling Methods 0.000 claims abstract description 165
- 239000000284 extract Substances 0.000 claims abstract description 5
- 229920000742 Cotton Polymers 0.000 claims description 18
- 238000005192 partition Methods 0.000 claims description 9
- 230000005494 condensation Effects 0.000 claims 1
- 238000009833 condensation Methods 0.000 claims 1
- 238000005057 refrigeration Methods 0.000 abstract description 9
- 238000005476 soldering Methods 0.000 abstract description 9
- 230000004907 flux Effects 0.000 abstract description 6
- 238000011084 recovery Methods 0.000 abstract description 3
- 230000036541 health Effects 0.000 abstract description 2
- 238000004064 recycling Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 239000012535 impurity Substances 0.000 description 3
- 238000007664 blowing Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
Landscapes
- Filtering Of Dispersed Particles In Gases (AREA)
Abstract
The utility model relates to a cold air circulating and filtering structure of a reflow oven, which comprises an upper cooling structure and a lower cooling structure, wherein circulating cooling airflow is formed between the upper cooling structure and the lower cooling structure, the upper cooling structure comprises a cold air motor and a cooling impeller driven by the cold air motor, and a condensing pipe is arranged at one side of the cooling impeller, which is far away from the cold air motor; the lower cooling structure comprises a cold air motor and a cooling impeller driven by the cold air motor; the cooling cavity of the lower cooling structure is divided into an air inlet part and an air outlet part, the cooling impeller of the lower cooling structure extracts air flow of the air inlet part and conveys the air flow to the air outlet part, the air outlet part is communicated with the cooling cavity of the upper cooling structure, and the air outlet side of the cooling cavity of the upper cooling structure is communicated with the air inlet part of the cooling cavity of the lower cooling structure. According to the utility model, the cooling filter assembly is arranged in the refrigeration station, and the filtering and recycling of the soldering flux are realized while the circulating air is blown; the recovery and filtration efficiency of the soldering flux is improved, and the damage to the external environment and the health of workers is reduced.
Description
Technical Field
The utility model relates to the technical field of reflow ovens, in particular to a cold air circulating and filtering structure of a reflow oven.
Background
Reflow ovens are one type of equipment required for SMT processes in the electronics and technology industry. The reflow oven process is to realize the soldering of the mechanical and electrical connection between the soldering terminals or pins of the surface-assembled components and the soldering pads of the printed board by remelting the paste solder pre-distributed on the soldering pads of the printed board. The reflow oven is the last key process of the surface mounting technology, and is a real-time control process. The process is complex and involves multiple sets of process parameters.
From this, it is found that the gas in the reflow oven contains a large amount of impurities such as flux, and the output quality of the product is easily affected. The conventional cold air generation generally adopts a structure of cooling pipes and fans for blowing, but the structure has single cooling position, and particularly in a gas environment with high impurity content, the product quality is easily affected.
Disclosure of Invention
The inventor aims at the defects in the prior art, and provides a cold air circulating and filtering structure of a reflow oven with reasonable structure, which can timely extract and filter the gas containing the soldering flux impurities and ensure the air flow purity in a station.
The technical scheme adopted by the utility model is as follows:
a cold air circulating and filtering structure of a reflow oven comprises an upper cooling structure and a lower cooling structure, wherein circulating cooling air flow is formed between the upper cooling structure and the lower cooling structure,
the upper cooling structure comprises a cold air motor and a cooling impeller driven by the cold air motor, and a condensing tube is arranged at one side of the cooling impeller, which is away from the cold air motor;
the lower cooling structure comprises a cold air motor and a cooling impeller driven by the cold air motor; the cooling cavity of the lower cooling structure is divided into an air inlet part and an air outlet part, the cooling impeller of the lower cooling structure extracts air flow of the air inlet part and conveys the air flow to the air outlet part, the air outlet part is communicated with the cooling cavity of the upper cooling structure, and the air outlet side of the cooling cavity of the upper cooling structure is communicated with the air inlet part of the cooling cavity of the lower cooling structure.
As a further improvement of the above technical scheme:
a drainage inclined plane is arranged in the cooling cavity of the lower cooling structure, and divides the cooling cavity of the lower cooling structure into an air inlet part and an air outlet part.
The drainage inclined plane is inclined upwards from the cooling fan of the lower cooling structure.
The product is located between the upper cooling structure and the lower cooling structure, and the projection of the drainage inclined plane on the horizontal plane is larger than the cooling area of the product.
The exhaust part separated by the drainage inclined plane is provided with two exhaust paths which respectively act on the product and are discharged into the cooling cavity of the upper cooling structure.
The axis of the cooling impeller of the upper cooling structure and the axis of the cooling impeller of the lower cooling structure are mutually perpendicular.
The air inlet part is internally provided with a cooling filter assembly, the cooling filter assembly comprises a filter screen and filter cotton which are positioned in the same plane, and air flow is pumped by a cooling impeller of a lower cooling structure after passing through the filter screen and the filter cotton in sequence.
The filter screen and the filter cotton are separated by a partition board, and an airflow path flows from the filter screen on one side of the partition board to the filter cotton on the other side of the partition board.
The area of the filter cotton is larger than that of the filter screen.
The bottom of the air inlet part is also provided with a condensing tube.
The beneficial effects of the utility model are as follows:
the utility model has compact and reasonable structure, and the cooling filter assembly is arranged in the refrigeration station, so that the filtration and recovery of the soldering flux are realized while the circulating air is blown; the recovery and filtration efficiency of the soldering flux is improved, and the damage to the external environment and the health of workers is reduced;
the refrigerating station adopts an independent upper and lower refrigerating mode, cold air motors are arranged in the upper cover and the box body to supply energy to cool the product rapidly, and meanwhile, the refrigerating structure in the box body also has a diversion effect to enable air flows in the upper chamber and the lower chamber to circularly flow to form reciprocating air flows.
Drawings
Fig. 1 is a schematic view of the whole structure of the present utility model, in which an upper cover is hidden.
Fig. 2 is a schematic overall structure of the present utility model, showing the upper cover.
Fig. 3 is a schematic view of the structure of the refrigeration station of the present utility model.
Fig. 4 is a schematic view of another view of the refrigeration station of the present utility model.
Fig. 5 is a cross-sectional view of a refrigeration station of the present utility model.
FIG. 6 is a schematic view of a cooling filter assembly according to the present utility model.
Wherein: 1. a case; 2. an upper cover; 3. a feeding station; 4. a preliminary filtration station; 5. a heating station; 6. a vacuum pumping station; 7. a refrigeration station; 8. a blanking station; 9. a conveyor chain;
701. a cool air motor; 702. a cooling chamber; 703. cooling the impeller; 704. a condensing tube; 705. cooling the filter assembly; 706. a filter screen; 707. filtering cotton; 708. drainage inclined plane.
Detailed Description
The following describes specific embodiments of the present utility model with reference to the drawings.
As shown in fig. 1, the cold air circulating filter structure of the reflow oven of the embodiment comprises an upper cooling structure and a lower cooling structure, circulating cooling air flow is formed between the upper cooling structure and the lower cooling structure,
the upper cooling structure comprises a cold air motor 701 and a cooling impeller 703 driven by the cold air motor 701, wherein a condensing pipe 704 is arranged on one side of the cooling impeller 703 away from the cold air motor 701;
the lower cooling structure comprises a cold air motor 701 and a cooling impeller 703 driven by the cold air motor 701; the cooling cavity 702 of the lower cooling structure is divided into an air inlet part and an air outlet part, the cooling impeller 703 of the lower cooling structure extracts air flow of the air inlet part and conveys the air flow to the air outlet part, the air outlet part is communicated with the cooling cavity 702 of the upper cooling structure, and the air outlet side of the cooling cavity 702 of the upper cooling structure is communicated with the air inlet part of the cooling cavity 702 of the lower cooling structure.
A drainage ramp 708 is provided in the cooling cavity 702 of the lower cooling structure, the drainage ramp 708 dividing the cooling cavity 702 of the lower cooling structure into an intake portion and an exhaust portion.
The drainage ramp 708 points obliquely upward from the cooling fan of the lower cooling structure.
The product is located between the upper and lower cooling structures, and the projection of the drainage ramp 708 on the horizontal plane is greater than the chilled area of the product.
The exhaust portion separated by the drainage ramp 708 has two exhaust paths that act on the product and exhaust into the cooling cavity 702 of the upper cooling structure, respectively.
The axis of the cooling impeller 703 of the upper cooling structure and the axis of the cooling impeller 703 of the lower cooling structure are perpendicular to each other.
The cooling filter assembly 705 is arranged in the air inlet part, the cooling filter assembly 705 comprises a filter screen 706 and filter cotton 707 which are positioned in the same plane, and the air flow passes through the filter screen 706 and the filter cotton 707 in sequence and is sucked by the cooling impeller 703 of the lower cooling structure.
The filter screen 706 and the filter cotton 707 are separated by a partition board, and the air flow path flows from the filter screen 706 on one side of the partition board to the filter cotton 707 on the other side of the partition board.
The area of the filter cotton 707 is greater than the area of the filter screen 706.
The bottom of the intake section is also provided with a condenser tube 704.
As shown in fig. 1 and 2, the hidden upper cover 2 of the reflow oven and the structure with the upper cover 2 are schematically shown in the present utility model.
After the upper cover 2 is hidden, the box body 1 can be intuitively seen to be divided into a plurality of stations, and each station carries out one-step processing treatment on the product. The device comprises a feeding station 3, a preliminary filtering station 4, a heating station 5, a vacuumizing station 6, a refrigerating station 7 and a discharging station 8 in sequence from left to right in the figure.
All stations are connected by a conveyor chain 9, and the conveyor chain 9 conveys the products one by one through the stations and then outputs the products from the blanking station 8.
The refrigeration station 7 of the utility model adopts a treatment mode of acting on the product up and down simultaneously. The cold air motor in the upper cover 2 is positioned at the uppermost part, one side of the output end of the cold air motor is provided with an upper cooling cavity, a cooling impeller and a condensing pipe are arranged in the upper cooling cavity, and air flow sucked by the cooling impeller passes through the condensing pipe and then downwards blows to a product along the side wall of the upper cooling cavity;
the cold air motor in the box body 1 drives the cooling impeller, and the suction air flow is upwards guided to the product to cool the product.
The flow direction of the air flow at the refrigeration station 7 will be described with reference to the cross-sectional view of the refrigeration station 7 of fig. 5. The cooling impeller driven by the cold air motor above sucks air, sucks air flow below, and then diverges to the circumference of the cooling impeller through the cooling impeller; the outer shell of the upper shell is hidden in fig. 5. During the downward blowing of the air flow in the upper shell, it acts on the product.
The cold air motor in the box body 1 drives the cooling impeller to rotate, so that suction is realized, and the sucked air flow rises along a drainage inclined plane in the figure and is blown to the lower part of the product. Since the drainage ramp divides the lower cooling chamber into upper and lower areas, the right area in fig. 5 communicates with the upper cooling chamber, and the airflow flow path finally presented is: the air flow of the upper cooling cavity passes through the right side area of the lower cooling cavity in the figure, and is filtered for the first time by the filter screen of the cooling filter assembly; the filtered air flow flows to the bottom of the lower cooling cavity, is pumped by a cooling impeller in the box body 1 and then is sent to a drainage inclined plane to act on a product along the drainage inclined plane; the upper cold air motor sucks the air flow and then conveys the air flow to the lower cooling cavity through the right side area of the box body 1 in the figure, so as to obtain the circulated cooling air flow.
In order to optimize the filtering effect, the filtering surface in fig. 5 adopts a mode of combining a filter screen and filter cotton, and air flow firstly passes through the filter screen and then passes through the filter cotton with larger area for twice filtering.
The above description is intended to illustrate the utility model and not to limit it, the scope of which is defined by the claims, and any modifications can be made within the scope of the utility model.
Claims (10)
1. A cold air circulating filter structure of a reflow oven is characterized in that: comprises an upper cooling structure and a lower cooling structure, wherein circulating cooling air flow is formed between the upper cooling structure and the lower cooling structure,
the upper cooling structure comprises a cold air motor (701) and a cooling impeller (703) driven by the cold air motor (701), and a condensing tube (704) is arranged at one side of the cooling impeller (703) away from the cold air motor (701);
the lower cooling structure comprises a cold air motor (701) and a cooling impeller (703) driven by the cold air motor (701); the cooling cavity (702) of the lower cooling structure is divided into an air inlet part and an air outlet part, the cooling impeller (703) of the lower cooling structure extracts air flow of the air inlet part and conveys the air flow to the air outlet part, the air outlet part is communicated with the cooling cavity (702) of the upper cooling structure, and the air outlet side of the cooling cavity (702) of the upper cooling structure is communicated with the air inlet part of the cooling cavity (702) of the lower cooling structure.
2. The reflow oven cool air circulation filter structure of claim 1, wherein: a drainage inclined plane (708) is arranged in the cooling cavity (702) of the lower cooling structure, and the drainage inclined plane (708) divides the cooling cavity (702) of the lower cooling structure into an air inlet part and an air exhaust part.
3. The return oven cooling air circulating filter structure according to claim 2, wherein: the drainage ramp (708) is directed obliquely upward from the cooling fan of the lower cooling structure.
4. A reflow oven cool air circulation filter structure in accordance with claim 3, wherein: the product is located between the upper cooling structure and the lower cooling structure, and the projection of the drainage inclined plane (708) on the horizontal plane is larger than the cooling area of the product.
5. The reflow oven cool air circulation filter structure of claim 4, wherein: the exhaust portion separated by the drainage ramp (708) has two exhaust paths that act on the product and exhaust into the cooling cavity (702) of the upper cooling structure, respectively.
6. The reflow oven cool air circulation filter structure of claim 1, wherein: the axis of the cooling impeller (703) of the upper cooling structure and the axis of the cooling impeller (703) of the lower cooling structure are mutually perpendicular.
7. The reflow oven cool air circulation filter structure of claim 1, wherein: the air inlet part is internally provided with a cooling filter assembly (705), the cooling filter assembly (705) comprises a filter screen (706) and filter cotton (707) which are positioned in the same plane, and air flow is pumped by a cooling impeller (703) of a lower cooling structure after passing through the filter screen (706) and the filter cotton (707) in sequence.
8. The return oven cooling air circulating filter structure of claim 7, wherein: the filter screen (706) and the filter cotton (707) are separated by a partition board, and an air flow path flows from the filter screen (706) on one side of the partition board to the filter cotton (707) on the other side of the partition board.
9. The return oven cooling air circulating filter structure of claim 8, wherein: the area of the filter cotton (707) is larger than the area of the filter screen (706).
10. The reflow oven cool air circulation filter structure of claim 1, wherein: the bottom of the air inlet part is also provided with a condensation pipe (704).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321047607.6U CN219942759U (en) | 2023-05-04 | 2023-05-04 | Cold air circulating and filtering structure of reflow oven |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321047607.6U CN219942759U (en) | 2023-05-04 | 2023-05-04 | Cold air circulating and filtering structure of reflow oven |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219942759U true CN219942759U (en) | 2023-11-03 |
Family
ID=88537826
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321047607.6U Active CN219942759U (en) | 2023-05-04 | 2023-05-04 | Cold air circulating and filtering structure of reflow oven |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219942759U (en) |
-
2023
- 2023-05-04 CN CN202321047607.6U patent/CN219942759U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant |