Two-in-one cold trap for reflow oven

Abstract

The utility model relates to a two-in-one cold trap for a reflow oven, which is suitable for the reflow oven and comprises a shell, a gas inlet and a gas outlet, the gas inlet and the gas outlet are arranged on the shell, the interior of the shell is divided into a gas inlet cavity and a filter cavity along the flowing direction of gas flow, the filter cavity is provided with a filter element, the gas inlet cavity is provided with a waste discharge port, and the filter element is arranged on the gas outlet wall surface of the shell. According to the utility model, the internal chamber of the cold trap arranged in the reflow furnace is divided into an upper part and a lower part, so that the redundant soldering flux can be recycled in a centralized manner while the fluid is purified.

Description

Technical Field

[0001] The utility model relates to the technical field of reflow furnace cold traps, in particular to a two-in-one cold trap for a reflow furnace. Background Art

[0002] A cold trap is a device that prevents the flow of vapor or liquid between a system and a measuring instrument. It provides a low-temperature surface on which molecules condense and increases the vacuum level.

[0003] The fluid in the reflow oven usually contains excess flux, which is equivalent to impurities mixed into the fluid, affecting the purity of the fluid. Utility Model Content

[0004] In view of the shortcomings of the above-mentioned existing production technology, the applicant provides a two-in-one cold trap for a reflow furnace with a reasonable structure. Based on the structure of the cold trap itself, two upper and lower chambers are set to adsorb and collect excess flux.

[0005] The technical solutions adopted in this utility model are as follows:

[0006] A two-in-one cold trap for a reflow furnace is suitable for the reflow furnace, comprising a shell, a gas inlet and a gas outlet on the shell. The interior of the shell is divided into an air intake chamber and a filter chamber along the direction of air flow. The filter chamber is provided with a filter element, and the air intake chamber is provided with a waste outlet.

[0007] The filter element is installed on the air outlet wall of the shell, and air flow space is reserved around the filter element.

[0008] As a further improvement of the above technical solution:

[0009] The filter element includes a bottom wall and a side wall. The flow path of the airflow to be processed flows through the bottom wall and the side wall of the filter element in sequence and is output through the filter element.

[0010] The gas inlet is located on the wall surface of the air inlet cavity, and the output end of the gas inlet points to the bottom wall of the filter element.

[0011] An observation window is also provided on the wall of the air inlet cavity, and the vertical height of the observation window is lower than the vertical height of the gas inlet.

[0012] The waste outlet is located at the bottom of the air inlet chamber and is closed during the filtration process.

[0013] A cooling medium space is formed on the circumference of the cold trap shell, and the axial height of the cooling medium space is smaller than the axial heights of the air inlet cavity and the filter cavity.

[0014] The gas outlet, the filter element and the housing are coaxially arranged.

[0015] The beneficial effects of the utility model are as follows:

[0016] The utility model is particularly aimed at the cold trap set in the reflow furnace, improves its internal structure, and divides the internal chamber into two parts, the upper and lower parts. After the gas enters the chamber from the middle side wall of the cold trap, it enters the filter element upward, and the filter element filters the fluid containing impurities to purify the fluid. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Fig. 1 This is a schematic diagram of the overall structure of the cold trap of the present utility model.

[0018] Fig. 2 This is the front view of the cold trap of the present utility model.

[0019] Fig. 3 This is a cross-sectional view of the cold trap of the present utility model.

[0020] Wherein: 1. Shell; 2. Gas inlet; 3. Gas outlet; 4. Waste outlet; 5. Observation window; 6. Cooling inlet; 7. Cooling outlet;

[0021] 101. Cooling medium space; 102. Gas space; 103. Filter element. DETAILED DESCRIPTION

[0022] The specific implementation of the present utility model will be described below with reference to the accompanying drawings.

[0023] like Figs. 1-3 As shown, the two-in-one cold trap for reflow furnace of this embodiment is suitable for reflow furnace, comprising a shell 1, a gas inlet 2 and a gas outlet 3 on the shell 1. The interior of the shell 1 is divided into an air inlet chamber and a filter chamber along the direction of air flow. The filter chamber is provided with a filter element 103, and the air inlet chamber is provided with a waste outlet 4.

[0024] The filter element 103 is installed on the wall surface of the housing 1 where air is discharged, and a flow space for air flow is reserved around the filter element 103 .

[0025] The filter element 103 includes a bottom wall and side walls. The flow path of the airflow to be processed flows through the bottom wall of the filter element 103 and the side walls of the filter element 103 in sequence and is output through the filter element 103.

[0026] The gas inlet 2 is located on the wall of the air inlet cavity, and the output end of the gas inlet 2 points to the bottom wall of the filter element 103 .

[0027] An observation window 5 is also provided on the wall of the air inlet cavity, and the vertical height of the observation window 5 is lower than the vertical height of the gas inlet 2 .

[0028] The waste outlet 4 is located at the bottom of the air inlet cavity and is in a closed state during the filtration process.

[0029] A cooling medium space 101 is formed on the circumference of the cold trap housing 1 , and the axial height of the cooling medium space 101 is smaller than the axial heights of the air inlet cavity and the filter cavity.

[0030] The gas outlet 3 , the filter element 103 , and the housing 1 are coaxially arranged.

[0031] The specific structure and working process of the utility model are as follows:

[0032] like Figs. 1-3 The figure shows the overall structure of the cold trap. Fig. 2 and Fig. 3 The cold trap shell 1 is cylindrical, and the interior of the shell 1 is a gas space 102. The top of the gas space 102 is connected to a gas outlet 3, and the gas outlet 3 is connected to a filter element 103 built into the gas space 102. In this way, the gas space 102 is divided into a filter chamber with a filter element 103 in the upper half and an air inlet chamber in the lower half.

[0033] A cooling medium space 101 is provided around the gas space 102. The axial height of the gas space 102 is greater than that of the cooling medium space 101, i.e., the portion containing the filter element 103 is higher than the cooling medium space 101. This provides installation space for the filter element 103 and reduces the heat exchange area of ​​the refrigerant.

[0034] In order to improve the filtering efficiency, the gas inlet 2 is arranged below the filter element 103, on the side wall of the air inlet cavity, and the outlet direction of the gas inlet 2 points to the bottom wall of the filter element 103. The untreated gas that has not been completely filtered by the bottom wall of the filter element 103 continues to contact the side wall of the filter element 103 upward under the influence of the airflow direction and is filtered by the side wall of the filter element 103.

[0035] In one embodiment of the present invention, sufficient spacing is reserved between the filter element 103 and the inner wall of the shell 1. When the airflow flows upward along the side wall of the filter element 103 to the top wall of the shell 1, there is ample space for the airflow to turn and flow along the inner wall of the shell 1 to the bottom wall near the filter element 103, forming a local backflow, ensuring that the airflow inside the cold trap is not prone to turbulence.

[0036] The flux filtered by the filter element is directly discharged through the drain valve at the bottom.

[0037] The above description is an explanation of the utility model, not a limitation of the utility model. The scope of the utility model is defined by the claims. Any form of modification can be made within the scope of protection of the utility model.

Claims

1. A two-in-one cold trap for a reflow furnace, characterized by: The invention is suitable for a reflow furnace, comprising a shell (1), a gas inlet (2) on the shell (1), and a gas outlet (3); the interior of the shell (1) is divided into an air intake chamber and a filter chamber along the flow direction of the air flow; the filter chamber is provided with a filter element (103); and the air intake chamber is provided with a waste outlet (4). The filter element (103) is mounted on the air outlet wall of the housing (1), and a flow space for air flow is reserved around the filter element (103).

2. The two-in-one cold trap for a reflow furnace according to claim 1, wherein: The filter element (103) comprises a bottom wall and a side wall, and the flow path of the airflow to be processed flows through the bottom wall of the filter element (103) and the side wall of the filter element (103) in sequence and is output through the filter element (103).

3. The two-in-one cold trap for a reflow furnace according to claim 2, wherein: The gas inlet (2) is located on the wall surface of the air inlet cavity, and the output end of the gas inlet (2) points to the bottom wall of the filter element (103).

4. The two-in-one cold trap for a reflow furnace according to claim 3, wherein: An observation window (5) is also provided on the wall surface of the air inlet cavity, and the vertical height of the observation window (5) is lower than the vertical height of the gas inlet (2).

5. The two-in-one cold trap for a reflow furnace according to claim 1, wherein: The waste outlet (4) is located at the bottom of the air inlet cavity and is in a closed state during the filtering process.

6. The two-in-one cold trap for a reflow furnace according to claim 1, wherein: A cooling medium space (101) is formed circumferentially on the cold trap housing (1), and the axial height of the cooling medium space (101) is smaller than the axial heights of the air inlet cavity and the filter cavity.

7. The two-in-one cold trap for a reflow furnace according to claim 1, wherein: The gas outlet (3), the filter element (103), and the housing (1) are coaxially arranged.

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